Mehrfachzahnkranz für Fahrrad-Kettenschaltung

Zahnkranz-Trägereinrichtung (74) für ein Fahrrad, aufweisend: einen ersten Außenumfangsflächenabschnitt (90), der ausgebildet ist, um eine Innenumfangsfläche (212) eines ersten Zahnkranzes (200) zur Rotation um eine Achse (C) zu tragen, wobei der erste Außenumfangsflächenabschnitt (90) mindestens ein sich radial nach innen erstreckendes Keilzahnprofil (110) und mindestens ein sich radial nach außen erstreckendes Keilzahnprofil (114) definiert, wobei das mindestens eine sich radial nach innen erstreckende Keilzahnprofil (110) eine radiale innere Fläche (118) mit einem ersten radialen inneren Abstand (RID1) von der Achse (C) aufweist, und wobei das mindestens eine sich radial nach außen erstreckende Keilzahnprofil (114) eine radiale äußere Fläche (122) mit einem ersten radialen äußeren Abstand (ROD1) von der Achse (C) aufweist; einen zweiten Außenumfangsflächenabschnitt (94), der ausgebildet ist, um eine Innenumfangsfläche eines zweiten Zahnkranzes (300) zur Rotation um die Achse zu tragen ...

Zusammenbau eines mehrstufigen Kettenrades für ein Fahrrad.

FAHRRADSCHALTWERKAPPARAT UND FAHRRADANTRIEBSEINHEIT

Ein Fahrradschaltwerkapparat umfasst ein Basisglied, ein erstes Schaltwerkglied, ein zweites Schaltwerkglied, ein erstes Koppelglied, eine erste Führstruktur, eine Schalteinrichtung und einen Schaltwerksteuerer. Die Schalteinrichtung ist/wird ausgestaltet zum Schalten einer Position des ersten Schaltwerkglieds in Bezug auf das Basisglied in einer Axialrichtung zwischen einer ersten Axialposition und einer zweiten Axialposition. Der Schaltwerksteuerer ist/wird ausgestaltet zum Steuern der Schalteinrichtung und der ersten Führstruktur, um einen ersten Eingreifzustand des ersten Koppelglieds nicht zu wechseln von einem Zahnrad zu einem anderen benachbarten Zahnrad aus den ersten Zahnrädern, wenn das erste Schaltwerkglied in Bezug auf das Basisglied sich bewegt im Zusammenhang mit einer Bewegung der ersten Führstruktur in Bezug auf das Basisglied zum Wechseln eines zweiten Eingreifzustands des ersten Koppelglieds von einem Zahnrad zu einem anderen benachbarten Zahnrad aus den zweiten Zahnrädern ...

FAHRRAD-KETTENRAD UND FAHRRAD-KETTENRAD-BAUEINHEIT

Die vorliegende Erfindung stellt ein Fahrrad-Kettenrad 11 bereit, mit dem das Schaltverhalten verbessert werden kann. Das Fahrrad-Kettenrad 11 gemäß der vorliegenden Erfindung weist einen ersten Kettenradkörper 13 und mehrere erste Kettenradzähne 14 auf. Die mehreren ersten Kettenradzähne 14 weisen mehrere Zahnkopfabschnitte 17 und mehrere Zahnfußabschnitte 18 auf. Die mehreren Zahnfußabschnitte 18 weisen wenigstens einen ersten Zahnfußabschnitt 19 und wenigstens einen zweiten Zahnfußabschnitt 20 auf. Der wenigstens eine erste Zahnfußabschnitt 19 hat eine erste Zahnfußform. Der wenigstens eine zweite Zahnfußabschnitt 20 hat eine zweite Zahnfußform. Die erste Zahnfußform unterscheidet sich von der zweiten Zahnfußform.

Mehrfach-Ritzelanordnung und Fahrradantrieb mit einer solchen Mehrfach-Ritzelanordnung

Die Erfindung betrifft eine Mehrfach-Ritzelanordnung zur Montage an einer Hinterradnabe und zum Eingriff in eine Fahrradkette mit mindestens zehn benachbarten Ritzeln mit unterschiedlichen Zähnezahlen, wobei jeweils zwei benachbarte Ritzel der Ritzel zueinander in einem vorgegebenen Abstand angeordnet sind, und der vorgegebene Abstand entweder einem kleinsten Abstand oder einem größeren Abstand entspricht, wobei höchstens 70 % der vorgegebenen Abstände dem kleinsten Abstand entsprechen.

FAHRRADKETTENRADANORDNUNG

Fahrradkettenradanordnung umfasst mehrere Kettenräder und ein erstes Stützelement. Die mehreren Kettenräder sind koaxial um eine Drehmittelachse der Fahrradkettenradanordnung angeordnet. Die mehreren Kettenräder umfassen ein erstes Kettenrad. Das erste Kettenrad umfasst einen ersten Zahnkranz und einen ersten Kettenradkörper, der in Bezug auf die Drehmittelachse zumindest teilweise radial innerhalb des ersten Zahnkranzes angeordnet ist. Der erste Zahnkranz ist aus einem ersten Material hergestellt. Der erste Kettenradkörper ist aus einem zweiten Material hergestellt, das sich von dem ersten Material unterscheidet. Das erste Stützelement erstreckt sich in einer axialen Richtung in Bezug auf die Drehmittelachse von dem ersten Kettenrad bis zu einem zweiten Kettenrad, das zu dem ersten Kettenrad benachbart ist. Das erste Stützelement ist aus einem ersten zusätzlichen Material hergestellt, das sich von dem zweiten Material unterscheidet.

KETTENRADTRÄGERKÖRPER UND FAHRRADNABENBAUGRUPPE

Ein Kettenradträgerkörper 30 umfasst eine Außenverzahnung 50, die so konfiguriert ist, dass sie mit einer Innenverzahnung 52 einer Fahrradkettenradanordnung 14 in Eingriff gebracht werden kann. Die Außenverzahnung 50 umfasst eine Vielzahl von Außenverzahnungs-Antriebsflächen 57, die so konfiguriert sind, dass sie eine Antriebsdrehkraft F1 zwischen dem Kettenradträgerkörper 30 und der Fahrradkettenradanordnung 14 in einer Umfangsrichtung D1 übertragen. Die Vielzahl von Außenverzahnungs-Antriebsflächen 57 umfasst mindestens vier erste Außenverzahnungs-Antriebsflächen 58 und mindestens eine zweite Außenverzahnungs-Antriebsfläche 60. Die mindestens vier ersten Außenverzahnungs-Antriebsflächen 58 sind jeweils an mindestens vier von neun ersten Außenverzahnungs-Antriebspositionen P11 angeordnet, die in Umfangsrichtung D1 um eine Drehmittelachse A1 herum gleichmäßig mit einem ersten Außenverzahnungs-Anstellwinkel PA11, der 40 Grad beträgt, angeordnet sind. Die mindestens eine zweite Außenverzahnungs-Antriebsfläche ...

Mehrstufiger Hinterradzusammenbau für ein Fahrrad

Zusammenbau eines mehrstufigen Kettenrades für ein Fahrrad.

Attaching sprocket cluster to freewheeling body of drive hub of bicycle, by holding together aligned sprocket wheels at periphery and axially attaching using securing screw

The complete sprocket cluster is gripped together by a device in order to simply assembly. The aligned sprocket wheels are held together at their periphery and then axially attached to the freewheeling body using a securing element such as an end screw (3). An independent claim is included for a device for fixing a complete sprocket cluster to a freewheeling body.

Dämpfungseinrichtung an einer Mehrfach-Kettenradanordnung

Die Erfindung stellt eine Dämpfungseinrichtung an einer Mehrfach-Kettenradanordnung an einem Hinterrad eines Fahrrades bereit, bei der Stoßkräfte durch die aus dem Leertrum auf das Kettenrad auflaufenden und in Kettenglieder in radialer Richtung auf die Zähnflanken auftreffenden Kettenglieder gedämpft werden. Im Unterschied zu herkömmlichen Systemen wird der Wirkungsgrad bei der Kraftübertragung nicht beeinträchtigt. Dies wird erreicht, indem die Kette im lastfreien Bereich des Ketteneinlaufs gedämpft wird. Im bevorzugten Ausführungsbeispiel wird ein Dämpfungsring zur Abstützung der Kettenlasche bereitgestellt sowie die Zahnkontur der keine Last übertragenden Zahnflanke zurück gesetzt und der erfindungsgemäße Zahnzwischenraum nach radial innen erweitert, damit beim Einlaufen der Kette auf das Ritzel nicht die Kettenrolle auf die Zahnflanke oder auf den Zahngrund aufschlägt, sondern die Kettenlasche auf den Dämpfungsring auftrifft. Im Laufe der Umdrehung vom Leertrum zum Lasttrum wird der ...

Fahrrad-Kettenrad und Fahrrad-Kettenrad-Baueinheit

Ein Fahrrad-Kettenrad 12, 212, 312 weist eine Drehmittelachse A1 auf. Das Fahrrad-Kettenrad 12, 212, 312 weist einen Kettenradkörper 22 und eine Ketteneingriffkonstruktion 24, 224, 324 auf. Die Ketteneingriffkonstruktion 24, 224, 324 ist am radialen Außenumfang des Kettenradkörpers 22 angeordnet. Die Ketteneingriffkonstruktion 24, 224, 324 weist mehrere Kettenantriebszähne 26, 226, die in eine Fahrradkette BC eingreifen und so eine Drehantriebskraft F1 auf die Fahrradkette BC übertragen, wenigstens einen das Herunterschalten erleichternden Bereich 42, 257A zum Erleichtern eines Herunterschaltvorgangs vom Fahrrad-Kettenrad 12, 212, 312 auf ein kleineres Kettenrad 14, 214 und wenigstens einen das Herunterschalten erleichternden Vorsprung 44, 344 auf, der in dem wenigstens einen das Herunterschalten erleichternden Bereich 42, 257A angeordnet ist und in die Fahrradkette BC eingreift, wenn die Fahrradkette BC vom Fahrrad-Kettenrad 12, 212, 312 zum kleineren Kettenrad 14, 214 schaltet.

HINTERE FAHRRADKETTENRADANORDNUNG

Hintere Fahrradkettenradanordnung umfasst mehrere Kettenräder und einen Kettenradträger. Die mehreren Kettenräder umfassen ein erstes Kettenrad und ein zweites Kettenrad. Das erste Kettenrad weist mindestens einen Umfangsverbindungspunkt auf. Das erste Kettenrad ist mit einer sich radial erstreckenden Fläche mindestens eines von mehreren Kettenradbefestigungsabschnitten an dem mindestens einen Umfangsverbindungspunkt verbunden. Das zweite Kettenrad weist mindestens einen zusätzlichen Umfangsverbindungspunkt. Das zweite Kettenrad ist an dem mindestens einen zusätzlichen Umfangsverbindungspunkt mit mindestens einem von dem Kettenradträger und einem der mehreren Kettenräder verbunden. Eine Gesamtanzahl des mindestens einen Umfangsverbindungspunkts unterscheidet sich von einer Gesamtanzahl des mindestens einen zusätzlichen Umfangsverbindungspunkts.

GLEITENDE KOMPONENTE UND INTERNE FAHRRADGETRIEBEVORRICHTUNG

Gleitende Komponente umfasst ein Basiselement, eine plattierte Schicht und ein Schmiermittel. Die plattierte Schicht umfasst ein metallisches Material und ist auf dem Basiselement angeordnet. Das Schmiermittel umfasst eine Fettsäure, die eine Carboxylgruppe aufweist. Das Schmiermittel kontaktiert die plattierte Schicht.

Extensible roller chain

... 492,935. Driving-chains. POLLAK, R. Nov. 16, 1937, No. 31433. Convention date, Nov. 16, 1936. [Class 24] The links of a roller chain are connected by bushes traversed by rivets for connecting the adjacent links, the rivets having sufficient clearance to permit shortening of the chain due to the pressure of an endless spring mounted on the chain or of a number of separate springs distributed along the chain. In the form shown, links 1 side by side are connected in pairs by bushes 2 forming bearings for rollers 4 and having cylindrical apertures 6 to receive rivets 5, which also connect together the adjacent outer links 7. The curvature of the rivets 5 at their contact surfaces corresponcls to the inner periphery of the bushes 2 in the apertures 6 of which they are movable. An endless spring 9 is disposed about the chain and maintained in position by extensions 8 on the links 1. In a modification several short springs are used, each connecting links a short distance apart.

Freewheel structure

Multi-speed free-wheel ring for bicycles

A multi-speed free-wheel sprocket support ring having two ball races for connecting the ring to an interior starwheel, and ratchet teeth intended to interact with spring clicks supported by the starwheel, said support ring is formed by at least one thin-walled tubular member (2,3). The ball races (7,10) and the toothing (9) are formed by deformations of the wall of the member.

MULTI-SPEED FREE-WHEEL RING FOR BICYCLES

PROCESS FOR THE PRODUCTION OF A MULTIPLE SPROCKET FREEWHEEL DEVICE

RATCHET DRIVE ARRANGEMENT

Freewheel drive hub for a cycle

The freewheel drive hub for a bicycle comprises a hub spindle consisting of two spindle parts axially disengageably coupled with one another. On a first of the two spindle parts, which is individually securable on the frame of the bicycle, a drive member is rotatably mounted, carrying at least one chain wheel. A hub sleeve is rotatably mounted on the second spindle part. A pawl freewheel with radial pawls pivotably mounted on the hub sleeve couples the drive member with the hub sleeve. A distance ring is loosely seated on the second spindle part on the side axially remote from the drive member. The distance ring carries an axially movable ring part which facilitates the handling of the distance ring and in the insertion of the second spindle part centers the distance ring on the hub sleeve.

PRODUCTION OF THREE-PINION FREEWHEEL DEVICE

FREEWHEEL DEVICE FOR BICYCLES

Improvements in or relating to shock absorbers

Wheel hub

Derailleur gear apparatus

A derailleur gear apparatus, comprising a housing (1), a mandrel (2), an assembly member (3), a drive assembly (4), a transmission assembly (5), and a clutch assembly (6). The mandrel (2) is axially and pivotedly connected to the housing (1); the assembly member (3) is provided with a driving gear (31); the transmission assembly (5) comprises a first variable gear (51) and second variable gear (52); the first variable gear (51) and second variable gear (52) are rotatable connected to the drive assembly (4), respectively; the clutch assembly (6) comprises a clutch member (61). The derailleur gear apparatus can greatly increase transmission stages of bicycles, and may not make a gear plate too thick, which results in that tooth jumping on a transmission cannot achieved smoothly, and the use is more convenient.

MECHANIK ZUM ÜBERTRAGEN EINER DREHBEWEGUNG MIT VERÄNDERBARER ÜBERSETZUNG

Eine Stellmechanik (800) zum Einstellen eines Übersetzungsverhältnisses zwischen einem Zugmittel (812), insbesondere einer Kette, und einem um eine Radachse drehbaren Radsatz, welcher zwei oder mehr Radblätter (810, 820, 830), insbesondere Zahnradblätter, umfasst,verstellt die Radkranzsektoren in Bezug auf eine festbleibende Fluchtebene des Zugmittels in einer Richtung quer zur Fluchtebene. Zumindest eines der Radblätter ist aus mehreren unabhängig stellbaren Radkranzsektoren (802, 803) zusammengesetzt. Mittels einer von einer Drehbewegung des Radsatzes entkoppelt gelagerten Stellkomponente (807) werden mehrere mitdrehende Verschubelemente (804, 805) über jeweils drehfreie Kopplungen in zumindest axialer Richtung zwischen einer ersten und einer zweiten Position verschoben,wobei jeder Radkranzsektor mit einem jeweils zugeordneten Verschubelement drehfest verbunden ist. Die erste Position eines Verschubelementes entspricht der Lage des zugehörenden Radkranzsektors außerhalb der Fluchtebene ...

MECHANIK ZUM ÜBERTRAGEN EINER DREHBEWEGUNG MIT VERÄNDERBARER ÜBERSETZUNG

Eine Stellmechanik (800) zum Einstellen eines Übersetzungsverhältnisses zwischen einem Zugmittel (812), insbesondere einer Kette, und einem um eine Radachse drehbaren Radsatz, welcher zwei oder mehr Radblätter (810, 820, 830), insbesondere Zahnradblätter, umfasst, verstellt die Radkranzsektoren in Bezug auf eine festbleibende Fluchtebene des Zugmittels in einer Richtung quer zur Fluchtebene. Zumindest eines der Radblätter ist aus mehreren unabhängig stellbaren Radkranzsektoren (802, 803) zusammengesetzt. Mittels einer von einer Drehbewegung des Radsatzes entkoppelt gelagerten Stellkomponente (807) werden mehrere mitdrehende Verschubelemente (804, 805) über jeweils drehfreie Kopplungen in zumindest axialer Richtung zwischen einer ersten und einer zweiten Position verschoben, wobei jeder Radkranzsektor mit einem jeweils zugeordneten Verschubelement drehfest verbunden ist. Die erste Position eines Verschubelementes entspricht der Lage des zugehörenden Radkranzsektors außerhalb der Fluchtebene ...

CARRYING ELEMENT FOR A BICYCLE CHAIN NETWORK

Gelenktreibkette.

Outil à débloquer pour roues libres.

Wechselgetriebe an Fahrrädern.

Elastische Kraftübertragungskette.

Moyeu avec roue libre pour cycle.

Pédalier de cycle à roues dentées de diamètres différents.

Kettenrad für Fahrräder und Verfahren zur Herstellung desselben.

Chaîne pour cycle et autre véhicule semblable.

Pédalier pour bicyclettes, tandems ou similaires.

Rollenkette

Dispositivo di registrazione automatica di una catena

Galet de guidage pour chaînes à rouleaux, notamment pour donner appui à la chaîne des cycles dans les changements de vitesse

Moyeu à roue libre pour changement de vitesse par déraillement.

Einrichtung zum Befestigen eines Kettenrades auf der Freilaufnabe eines Fahrrades.

Roue libre à pignons étagés.

Kettengetriebe.

Mécanisme à roue libre pour bicyclettes, motocyclettes, etc.

DEVICE WITH ROTATES FREE AND GROUP OF SPOOLS FOR THE TRANSMISSION OF THE MOTION IN THE BICYCLES.

BICYCLE WITH A CHAIN NETWORK.

BICYCLE CHAIN NETWORK.

Bicycle rear hub with freewheel - has ratchet drive on inside edge of gear block and with separate bearings for block

The rear axle has the axle shaft (20) secured to the machine and supporting the rear wheel via two bearings (29,30). The rear wheel block is mounted on a sleeve (18) with an inner face having the ratchet coupling (24) to the outside of the hub. The hub is widened at this point to take the drive. The rear wheel block is braced on the shaft by separate bearings (19). The ratchet has sprung teeth on the end of the block to grip inwards facing teeth on a ratchet ring (26) set inside the end of the hub. USE/ADVANTAGE - Freewheel system for bicycle is of simple construction, no space restriction by moving ratchet away from fork supports.

Ratchet wheel arrangement for a bicycle hub.

Die Erfindung betrifft eine Sperrradanordnung für eine Fahrradnabe, die ein Nabenlager (10) und ein Hülsenlager (20) umfasst, wobei zwischen dem Nabenlager (10) und dem Hülsenlager (20) ein Kupplungsring (30), ein angetriebener Ring (40) und ein Antriebsring (50) angeordnet sind, wobei der angetriebene Ring (40) ins Hohlteil des Kupplungsrings (30) eingebaut ist, wobei an der Aussenwand des angetriebenen Rings (40) eine Vielzahl von Eingriffssperrzähnen (42) ringförmig angeordnet ist, wobei der Antriebsring (50) in das Hülsenlager (20) eingesetzt ist und sich so synchron zum Hülsenlager (20) drehen kann, wobei an der dem Nabenlager (10) zugewandten Stirnseite des Antriebsrings (50) ferner eine Vielzahl von Sperrklinken (53) ringförmig angeordnet ist, die in die Eingriffssperrzähne (42) des angetriebenen Rings (40) eingreifen und so mit denselben gekoppelt werden, wobei der Abstand zwischen den Sperrklinken (53) grösser ist als der Abstand zwischen den Eingriffssperrzähnen (42), wobei zwischen ...

Chain gear for bicycle

Bicycle hub

Bicycle with direct propulsion

SYSTEME DE DOUBLE TRANSMISSION DU MOUVEMENT POUR CYCLE AVEC DOUBLE SYSTEME DE DERAILLEUR

DISPOSITIF PERMETTANT UNE DOUBLE TRACTION DE LA ROUE ARRIERE D'UN CYCLE. AVEC DEUX PEDALIERS SOLIDAIRES D'UN MEME AXE ET DEUX ROUES LIBRES OU JEU DE ROUES LIBRE EGALEMENT SOLIDAIRE D'UN MEME AXE. CE DISPOSITIF PERMET: L'ATTENUATION DES TEMPS MORTS, UNE TRAJECTOIRE PLUS RECTILIGNE, UN MEILLEUR RENDEMENT DE LA JAMBE GAUCHE, UNE MEILLEURE RESISTANCE MECANIQUE DU CADRE ET DES PIECES D'UN CYCLE. DISPOSITIF POUVANT S'APPLIQUER A TOUT TYPE DE CYCLE.

Improvements brought to the free wheels of bicycles, with staged pinions

Improvements with the hubs of wheels, in particular for auto-cycles and analogues

HUB HAS WHEEL FREE FOR BICYCLE

FREE-WHEELING CYCLE OR SIMILAR

Improvements with the systems of fast locking of a flask posed on two or several axes

Freewheel device shock resistant potting composition for bicycles.

MULTIPLE PINIONS OR PLATES IN PARTICULAR FOR BICYCLE

New layout of teeth for pinions, rollers, etc, using roller chains and applicable particularly to the shiftings of speed of bicycles by shifting tracks

Device of toothed pinions staged for free wheels of bicycles

New pedals for vélocipèdes

ROUE LIBRE MULTIPLE POUR DERAILLEUR DE BICYCLETTE

ROUE LIBRE MULTIPLE, EN PARTICULIER POUR DERAILLEUR DE BICYCLETTE, DU TYPE COMPRENANT UNE COURONNE PORTE-PIGNONS MONTEE SUR UN MOYEU A L'AIDE D'UN EMBRAYAGE, OU EMBOITEMENT, UNIDIRECTIONNEL. CETTE ROUE LIBRE MULTIPLE SE DISTINGUE EN CE QUE LESDITS PIGNONS FORMENT UN TOUT AVEC UNE CLOCHE 10 QUE L'ON PEUT RENDRE SOLIDAIRE DE LADITE COURONNE 11 A L'AIDE DE MOYENS DE BLOCAGE QUE L'ON PEUT INTRODUIRE ET RETIRER A LA MAIN SANS L'AIDE D'AUCUN OUTIL, CETTE CLOCHE 10 ETANT MAINTENUE ACCROCHEE PAR UN RESSORT ANTAGONISTE.

Blocks of interchangeable fixed pinions for bicycle

PROCEEDED FOR THE FREE MANUFACTURE OF WHEEL SEVERAL PINIONS FOR SHIFTING TRACK OF CYCLE, AS WELL AS THE FREE WHEELS OBTAINED

Bicycle chain transmission mechanism, includes set of toothed ring gears in which distance between two adjacent toothed ring gears varies according to selected transmission ratio

La présente invention porte sur les transmissions mécaniques par chaîne et, dans cet exemple de réalisation, concerne une transmission pour bicyclette. Elle présente plus précisément un mécanisme permettant d'augmenter le nombre de couronnes utilisées sur les transmissions à chaîne. Le mécanisme, selon l'invention, permet de faire varier la distance entre deux couronnes dentées adjacentes, en fonction des rapports de transmission sélectionnés. Cette variation de distance entre deux couronnes dentées adjacentes est obtenue par le déplacement de la tige de commande 17 donc du sélecteur 22 qui lui est lié. Le déplacement du sélecteur 22 engendre la mise en rotation des trois roues de commande 23. La rotation des trois roues de commande 23 permet la mise en contact des lobes de ces dernières avec la base de la couronne 78 puis le déplacement continu de celle-ci.

MULTIPLE FREE WHEEL FOR SHIFTING TRACK OF BICYCLE

TOGETHER OF PINIONS SEVERAL SPEEDS FOR A BICYCLE

COIL DENTEE FOR BICYCLE CHAIN

Compact drive hub for bicycle - with extension and ball races for free wheel drive tags in bearing groove

Drift-chain

Device news of a rigid bearing to one or two lines of balls combinéavec a thrust ball bearing, in the free of bicycles or similar wheels

CROWN OF FREE WHEEL OF BICYCLE, PROCESS OF FIXING OF PINIONS ON SUCH A CROWN AND COILS FREE THUS OBTAINED

Hub with free wheel

Disengageable crown wheel for engine bicycle and similar applications

Compact drive hub for bicycle - with extension and ball races for free wheel drive tags in bearing groove

FREE WHEEL FOR A BICYCLE

Improvements with the pedals of the apparatuses of locomotion driven by pedals

Transmission chain for a cycle in particular

Device of assembly of the free pinions of rouses, and the free wheels thus assembled

DISPOSITIF A ROUE LIBRE POUR BICYCLETTES

Dispositif à roue libre, du genre comportant un groupe de pignons sur un corps porteur alésé. Le plus petit pignon 1 de la roue libre présente un diamètre interne à peu prés égal à celui du corps intérieur 4 du dispositif, sur l'extrémité duquel il vient s'appliquer, ladite extremité comportant deux évidements 7 s'étendant axialement et permettant l'engagement d'une clé de manoeuvre 6. L'ajustage est effectué au moyen d'une seule et unique bague entretoise 13. Application aux bicyclettes de course.

Bicycle multi-gear cassette

A bicyclemulti-gear cassettemountable to a wheel hub that includes truncated conical shell having a first opening proximate a small shell base and a second opening proximate a large shell base. The openings are coaxial with an axis of the shell. A plurality of toothed sprockets having different numbers of teeth are disposed on the shell and extend radially of the central axis. A torque load transmitting profile is configured on the shell proximate one of the small and large shell bases. A radial load transmitting profile is configured on the shell proximate one of the small and large shell bases. The shell, sprockets, and the load transmitting profiles embody a single piece.

Bicycle rear hub

A bicycle rear hub includes a hub spindle, a drive part, a hub shell and a driving force measuring part. The drive part is rotatably supported on the hub spindle, and configured to receive a driving-force-input member. The hub shell is rotatably supported on the hub spindle and operatively coupled to the drive part for rotation by the drive part on the hub spindle. The driving force measuring part includes a first signal generating mechanism and a second signal generating mechanism. The first signal generating mechanism has a first magnet and a first coil. The second signal generating mechanism has a second magnet and a second coil. The second signal generating mechanism is axially aligned with the first signal generating mechanism in an axial direction of the hub spindle.

Slide component, bicycle component, bicycle rear sprocket, bicycle front sprocket, bicycle chain, and method of manufacturing slide component

A slide component comprises a base member and a plated layer. The base member is made of a titanium alloy including beta phase of titanium. The base member includes a surface having a plurality of recesses. The plated layer is provided on the surface of the base member.

MECHANICAL CHAIN TRANSMISSION

The invention relates to mechanical chain transmissions, more particularly bicycle transmissions, specifically a mechanism which permits an increase in the number of sprockets (7) used in chain transmissions. According to the invention, said mechanism permits a variation in the distance between two adjacent toothed sprockets as a function of the selected transmission ratio. Said variation in distance between two adjacent toothed sprockets is generated by the displacement of the control rod (17) and hence the selector (22), connected thereto. The displacement of the selector (22) causes the rotation of the three control wheels (23). The rotation of the three control wheels (23) permits the engagement of the lobes thereof with base of the sprocket (78) and hence the continuous displacement thereof.

Bicycle chain wheel assembly

A bicycle chain wheel assembly includes an outer ring made of Aluminum Alloy with teeth defined in an outer periphery thereof, and an inner ring made of composite material which is light in weight. The inner ring is securely connected to an inner periphery of the outer ring by rivets. The chain wheel has durable outer ring that is engaged with bicycle chain and light inner ring, so that the whole weight of the chain wheel is light and meets the requirement of a modern bicycle.

Sprocket shift assembly

A sprocket shift assembly wherein sprockets of different diameters are arranged as a cluster on a common shaft and are coupled with a chain between driving and driven members. The chain is movable as the sprockets rotate from one of the sprockets to another by realignment of portions of the sprocket such that the chain is at all times in a positive driving relationship with the cluster.

Derailleur

Derailleur with at least two sprockets on a sprocket set which is located around a pedal axle of a bicycle, which sprockets are provided with chain transfer assistance measures to assist the transfer of the chain in upshifting or downshifting, whereby the shifting can be done under load in both of these directions. The chain transfer assistance measures comprise a tooth space with a spiral-shaped base, a conical rivet with an encircling sharp edge to locate the chain in the vicinity of its links between the chain plates, as well as bevels, recesses and steps, the totality of which optimize the chain transfer in both directions between sprockets which are coordinated with one another.

Retaining device for a multi-stage sprocket assembly

A multi-stage sprocket assembly comprises a cylindrical member and a sprocket group and has therebetween a retaining device for preventing the sprocket group from axial movement with respect to the cylindrical member, the retaining device comprising an engaging groove extending circumferentially of the cylindrical member and an engaging member elastically engageable with the engaging groove and disengageable therefrom against the elastic engagement force. The engaging member engages with the engaging groove to mount the sprocket group to the cylindrical member in relation of being axially immovable and disengages from the groove to remove the sprocket group from the cylindrical member.

Gear for bicycles and a freewheel for bicycles including a plurality of such gears

A freewheel for bicycles has a plurality of gears each of which, with the exception of the one with the smallest diameter, has teeth arranged in successive sets of three constituted each by teeth of three different types. A first type of tooth has a face which is recessed relative to the corresponding flat face of the gear. A second type of tooth has a groove formed in the top surface of the tooth and extending circumferentially of the gear. A third type of tooth has a top chamfer on its face situated on the side opposite the recessed face of the first tooth.

Sprocket having teeth of improved shape and a cycle free-wheel including said sprocket

Each of the teeth (5) of the sprocket has a Y-shaped top (10) in a view developed along the circumference of the sprocket (5). The principal branch (10a) of the Y extends along the direction (11) of rotation of the sprocket and is located in the central part of the top (10) of the tooth. The two divergent branches (10b, 10c) of the Y are located at the front of the branch (10a) in the direction of rotation of the sprocket. The part of the tooth in the vicinity of the top comprises inclined surfaces which facilitate the reception of a chain on the sprocket. The sprocket is in particular intended for a free-wheel for a cycle providing a plurality of speeds.

BICYCLE SPROCKET FOR USE WITH A MULTI-GEAR REAR CASSETTE

A rear bicycle sprocket for use with a multi-gear rear cassette is provided. The sprocket includes a chain engaging portion and a mounting portion having generally annular shape about a central axis and a plurality of support arms, integrally formed with the chain engaging portion and with the mounting portion. The sprocket further includes a plurality of space maintaining protrusions, each space maintaining protrusion extending axially forwardly from an axially forward surface of a corresponding support arm and integrally formed therewith. A multi-gear rear cassette having a plurality of sprockets coaxially mounted together wherein the plurality of sprockets includes the rear bicycle sprocket mounted axially rearmost and a bicycle including the multi-gear rear cassette are further provided.

Low-noise chainwheel

A bicycle chainwheel assembly that includes at least one smaller chainwheel and at least one larger chainwheel, the chainwheels engageable by a chain. The larger chainwheel includes a first tooth and a second tooth disposed adjacent the first tooth opposite a drive rotation direction. The first tooth and the second tooth have a configuration that improves the shifting of a chain from a smaller chainwheel to the larger chainwheel. The first tooth has a lateral recess and the second tooth has a deflection chamfer. The second tooth may also have a recess. The first and second teeth have a configuration that prevents the first and second teeth from capturing the chain. An inner link plate of the chain includes a chamfer disposed on an outer side surface in a central region of the plate.

BICYCLE SPROCKET ARRANGEMENT

A bicycle sprocket arrangement comprises an internal spline configured to be engaged with an external spline of a sprocket support body of a bicycle hub assembly. The internal spline includes a plurality of internal-spline driving surfaces configured to transmit a rotational driving force between the bicycle sprocket arrangement and the bicycle hub assembly in a circumferential direction. The plurality of internal-spline driving surfaces includes at least four first internal-spline driving surfaces and at least one second internal-spline driving surface. The at least four first internal-spline driving surfaces are respectively arranged on at least four of nine first internal-spline driving positions equally arranged in the circumferential direction about a rotational center axis at a first internal-spline pitch angle which is equal to 40 degrees. The at least one second internal-spline driving surface is offset from the nine first internal-spline driving positions in the circumferential ...

BICYCLE SPROCKET

A bicycle sprocket comprises a sprocket body and chain-driving teeth. The chain-driving teeth comprises at least one first tooth and at least one second tooth. The at least one first tooth has a first circumferential tooth-length defined in a circumferential direction at a radial location defined in vicinity of a reference line. The at least one second tooth has a second circumferential tooth-length defined in the circumferential direction at the radial location. The first circumferential tooth-length is larger than the second circumferential tooth-length. A dimensional difference between the first circumferential tooth-length and the second circumferential tooth-length is equal to or smaller than 1 mm. 1. A bicycle sprocket comprising:a sprocket body including a radially outer periphery provided about a rotational center axis of the bicycle sprocket; and at least one first tooth provided on the radially outer periphery to engage with outer link plates of a bicycle chain, the at least one first tooth having a first circumferential tooth-length defined in a circumferential direction at a radial location defined in vicinity of a reference line, the circumferential direction being defined about the rotational center axis, the reference line being defined to connect centers of neighboring pins of the bicycle chain engaged with the chain-driving teeth when viewed from an axial direction parallel to the rotational center axis; and', 'at least one second tooth provided on the radially outer periphery to engage with inner link plates of the bicycle chain, the at least one second tooth having a second circumferential tooth-length defined in the circumferential direction at the radial location, the first circumferential tooth-length being larger than the second circumferential tooth-length, a dimensional difference between the first circumferential tooth-length and the second circumferential tooth-length being equal to or smaller than 1 mm., 'chain-driving teeth provided on ...

Bicycle sprocket assembly

A bicycle sprocket assembly is provided with at least a first sprocket and a first axial spacer. The first sprocket includes a first sprocket mounting portion, a plurality of first sprocket arms extending radially from the first sprocket mounting portion and a first chain engaging portion disposed on radial outer ends of the first sprocket arms. The first chain engaging portion includes a plurality of first teeth. The first axial spacer is disposed on a first sprocket side surface of the first sprocket. The first axial spacer has a first spacer mounting portion and a plurality of first spacer arms extending radially from the first spacer mounting portion. The first spacer arms are partially visible from an axial view of a second sprocket side surface that faces in an opposite direction from the first sprocket side surface.

Bicycle rear hub

A bicycle rear hub includes a hub spindle, a drive part, a hub shell, at least one first opposed part, at least one second opposed part and a driving force measuring part. The drive part is rotatably supported on the hub spindle, and configured to receive a driving-force-input member. The hub shell is rotatably supported on the hub spindle and operatively coupled to the drive part for rotation by the drive part on the hub spindle. The at least one first opposed part is coupled to the drive part. The at least one second opposed part is coupled to the hub shell and being disposed oppose to the first opposed part with a gap therebetween. The driving force measuring part includes at least one sensor arranged to measure at least one of the gap between the first and second opposed parts and a displacement of the gap.

Bicycle rear hub

A bicycle rear hub includes a hub spindle, a drive part, a hub shell, at least one first opposed part, at least one second opposed part and a driving force measuring part. The drive part is rotatably supported on the hub spindle, and configured to receive a driving-force-input member. The hub shell is rotatably supported on the hub spindle and operatively coupled to the drive part for rotation by the drive part on the hub spindle. The at least one first opposed part is coupled to the drive part. The at least one second opposed part is coupled to the hub shell and is disposed oppose to the first opposed part. The driving force measuring part includes a pressure sensor provided for contacting the first and second opposed parts.

Bicycle rear hub

A bicycle rear hub includes a hub spindle, a drive part, a hub shell and a driving force measuring part. The drive part is rotatably supported on the hub spindle, and configured to receive a driving-force-input member. The drive part includes a coupling part having a liquid storage area filled with a liquid. The hub shell is rotatably supported on the hub spindle and operatively coupled to the coupling part of the drive part for rotation by the drive part on the hub spindle. The driving force measuring part includes a liquid pressure sensor that detects pressure of the liquid in the liquid storage area of the coupling part of the drive part.

Crankset for a motorized cycle

A crank set for a bicycle includes a free-wheeling device having holes for attaching chain rings. The holes include two separate circular bolt hole patterns L 1 and L 2.

CONICAL BICYCLE CASSETTE SPROCKET STRUCTURE

A conical shaped bicycle cassette has a unitary sprocket assembly. Each annular portion of an individual sprocket is mechanically supported either from a back of the sprocket, in an axial direction toward a bicycle hub or from an inner radial direction toward a centerline axis of the bicycle cassette and hub. The axial support zones and radial support zones are alternated around a circumference of the sprocket so that an entirety of the sprocket is supported in either the axial direction or the radial direction. In this way, the chain driving loads on the cassette are spread throughout the entire cassette and the areas of highly localized stress from the cassette are removed. 2. The bicycle cassette of claim 1 , wherein each of the plurality of first radial support members and the plurality of first axial support members has one or more machined windows.3. The bicycle cassette of claim 1 , wherein the plurality of first radial support members are offset from the plurality of first axial support members along the first inner circumference of the first sprocket.4. The bicycle cassette of claim 3 , wherein positions of the plurality of first radial support members and the plurality of first axial support members on the first sprocket alternate such that along the first inner circumference each first radial support of the first radial supports is straddled by two of the first axial supports and each first axial support of the first axial supports is straddled by two of the first radial supports.5. The bicycle cassette of claim 1 , wherein a quantity of the first gear teeth is greater than a quantity of the second gear teeth and less than a quantity of the third gear teeth.6. The bicycle cassette of claim 1 , wherein in a direction aligned with the central axis claim 1 , a profile of both left and right sides of each of the plurality of radial supports and a profile of both left and right sides of each of the plurality of axial supports is curved.7. The bicycle cassette ...

BICYCLE REAR SPROCKET ASSEMBLY AND BICYCLE REAR SPROCKET

A bicycle rear sprocket assembly comprises a first sprocket. The first sprocket includes a first sprocket body, a plurality of first sprocket teeth, a bearing unit mounting section, and a first torque-transmitting structure. The plurality of first sprocket teeth extend radially outwardly from a first radially outer periphery of the first sprocket body with respect to a rotational center axis. The bearing unit mounting section is at least partly provided to a first radially inner periphery of the first sprocket body. The first torque-transmitting structure is configured to transmit pedaling torque to a second sprocket separately disposed adjacent to the first sprocket without another sprocket between the first sprocket and the second sprocket. The first torque-transmitting structure is provided to a first bicycle inbound facing surface and is a separate member from the second sprocket. 1. A bicycle rear sprocket assembly comprising: a first sprocket body,', 'a plurality of first sprocket teeth extending radially outwardly from a first radially outer periphery of the first sprocket body with respect to the rotational center axis,', 'a bearing unit mounting section at least partly provided to a first radially inner periphery of the first sprocket body, and', 'a first torque-transmitting structure configured to transmit pedaling torque to a second sprocket separately disposed adjacent to the first sprocket without another sprocket between the first sprocket and the second sprocket, the first torque-transmitting structure being provided to the first bicycle inbound facing surface and being a separate member from the second sprocket., 'a first sprocket having a first bicycle inbound facing surface and a first bicycle outbound facing surface opposite to the first bicycle inbound facing surface in an axial direction parallel to a rotational center axis of the bicycle rear sprocket assembly, the first sprocket including2. The bicycle rear sprocket assembly according to claim ...

SLIDING COMPONENT AND BICYCLE INTERNAL TRANSMISSION DEVICE

A sliding component comprises a base member, a plated layer, and a lubricant agent. The plated layer includes a metallic material and is disposed on the base member. The lubricant agent includes a fatty acid containing a carboxyl group. The lubricant agent contacts the plated layer. 1. A sliding component comprising:a base member;a plated layer including a metallic material, the plated layer being disposed on the base member; anda lubricant agent including a fatty acid containing a carboxyl group, the lubricant agent contacting the plated layer.2. The sliding component according to claim 1 , whereinthe fatty acid includes an olein acid.3. The sliding component according to claim 1 , whereinthe fatty acid includes a stearic acid.4. The sliding component according to claim 1 , whereinthe fatty acid includes a linoleic acid.5. The sliding component according to claim 1 , whereinthe plated layer has Vickers hardness ranging from 10 HV to 200 HV.6. The sliding component according to claim 1 , whereinthe plated layer includes tin.7. The sliding component according to claim 6 , further comprising:a chromized layer to slidably contact the plated layer.8. The sliding component according to claim 1 , whereinthe plated layer includes silver.9. The sliding component according to claim 8 , further comprising:a chromized layer to slidably contact the plated layer.10. The sliding component according to claim 1 , further comprising:a bicycle chain including the base member and the plated layer.11. The sliding component according to claim 10 , whereinthe bicycle chain includes an inner link plate and an outer link plate, andat least one of the inner link plate and the outer link plate includes the base member and the plated layer.12. The sliding component according to claim 11 , whereinthe bicycle chain includes a pin which is chromized.13. The sliding component according to claim 12 , whereinthe inner link plate includes the base member and the plated layer, andthe pin is ...

Bicycle sprocket

A bicycle sprocket comprises a sprocket body and a plurality of sprocket teeth. The plurality of sprocket teeth includes at least one first axially recessed upshifting-facilitation tooth with respect to a rotational center axis. The plurality of sprocket teeth includes at least one first axially recessed downshifting-facilitation tooth with respect to the rotational center axis. The at least one first axially recessed downshifting-facilitation tooth is adjacent to the at least one first axially recessed upshifting-facilitation tooth without another tooth therebetween in a circumferential direction with respect to the rotational center axis. The at least one first axially recessed upshifting-facilitation tooth and the at least one first axially recessed downshifting-facilitation tooth provide a first continuous recess extending in the circumferential direction.

SPROCKET MODULE FOR A BICYCLE AND SPROCKET ASSEMBLY COMPRISING SUCH A MODULE

A sprocket module for a bicycle has at least two sprockets fixedly coupled one another. At least one first sprocket of the at least two sprockets comprises engagement portion to a freewheel body of a hub for a bicycle rear wheel. A second sprocket of the module lacks the engagement portion and is supported on the freewheel body through the aforementioned at least one first sprocket. The module allows strong and low-weight sprocket assemblies to be made. 1. Sprocket module for a bicycle , comprising at least two sprockets fixedly coupled to one another , wherein at least one first sprocket of the at least two sprockets comprises an engagement portion that engages a freewheel body of a hub for a bicycle rear wheel.2. Sprocket module according to claim 1 , comprising at least one spacer element operatively interposed between the at least two sprockets.3. Sprocket module according to claim 2 , wherein the at least one spacer element lacks an engagement portion.4. Sprocket module according to claim 2 ,wherein the at least one first sprocket comprises a radially inner annular portion provided with the engagement portion, a radially outer annular portion, concentric to the radially inner annular portion, provided with a toothing for engaging with a bicycle chain, and a plurality of radial portions extending between the radially inner annular portion, and the radially outer annular portion,wherein the at least one spacer element is in abutment with the at least one first sprocket at least one first contact area defined in the radially inner annular portion and at least one second contact area arranged at a different radial distance from that of the at least one first contact area.5. Sprocket module according to claim 4 , wherein the at least one second contact area is defined at the radial portions.6. Sprocket module according to claim 4 ,wherein the at least one second sprocket comprises a plurality of radial projections extending cantilevered in a radially inner direction ...

BICYCLE SPROCKET ASSEMBLY

A bicycle sprocket assembly comprises a first sprocket. The first sprocket comprises a first sprocket body, a shifting facilitation area, and a plurality of first sprocket teeth. The plurality of first sprocket teeth includes a plurality of first teeth and a plurality of second teeth. The plurality of first teeth includes a shifting-facilitation tooth and a first driving tooth. A maximum axial top width of the shifting-facilitation tooth is smaller than a maximum axial bottom width of the shifting-facilitation tooth. The maximum axial top width of the shifting-facilitation tooth is smaller than a maximum axial top width of the first driving tooth. The plurality of second teeth includes a second driving tooth extending radially outwardly from the first sprocket body. The plurality of second teeth has a maximum axial width smaller than a maximum axial bottom width of the first driving tooth. 1. A bicycle sprocket assembly comprising: a first sprocket body having a rotational center axis;', 'a shifting facilitation area to facilitate a shifting operation in which a bicycle chain is shifted between the first sprocket and a second sprocket adjacent to the first sprocket; and', [ a shifting-facilitation tooth extending radially outwardly from the first sprocket body, the shifting-facilitation tooth being provided in the shifting facilitation area, the maximum axial top width of the shifting-facilitation tooth being smaller than the maximum axial bottom width of the shifting-facilitation tooth; and', 'a first driving tooth extending radially outwardly from the first sprocket body, the first driving tooth being provided outside the shifting facilitation area, the maximum axial top width of the shifting-facilitation tooth being smaller than the maximum axial top width of the first driving tooth; and, 'a plurality of first teeth configured to engage with an outer link space provided between an opposed pair of outer link plates of the bicycle chain, the plurality of first ...

BICYCLE SPROCKET SUPPORTING MEMBER AND BICYCLE SPROCKET ASSEMBLY

A bicycle sprocket assembly is basically provided with a bicycle sprocket supporting member and at least one sprocket. The bicycle sprocket supporting member includes an outer peripheral surface and an inner peripheral surface. The outer peripheral surface includes at least one sprocket engaging spline. The inner peripheral surface includes at least one hub engaging spline. The at least one sprocket is configured to be axially movable on the outer peripheral surface of the sprocket supporting member before the bicycle sprocket assembly becomes an assembled state. 1. A bicycle sprocket supporting member comprising:an outer peripheral surface including at least one sprocket engaging spline; andan inner peripheral surface including at least one huh engaging spline.2. A bicycle sprocket assembly comprising the sprocket supporting member according to claim 1 , and further comprisingat least one sprocket configured to be axially movable on the outer peripheral surface of the sprocket supporting member before the bicycle sprocket assembly becomes an assembled state.3. The bicycle sprocket assembly according to claim 2 , further comprisinga first sprocket carrier including at least one first spline engaged with at least one sprocket engaging spline of the sprocket supporting member, the first sprocket carrier supporting the at least one sprocket.4. The bicycle sprocket assembly according to claim 3 , whereinthe at least one sprocket includes a first sprocket and a second sprocket, andthe first sprocket carrier supports the first sprocket and the second sprocket.5. The bicycle sprocket assembly according to claim 3 , further comprisingat least one additional sprocket; anda second sprocket carrier supporting the at least one additional sprocket.6. The bicycle sprocket assembly according to claim 5 , whereinthe at least one additional sprocket includes a third sprocket and a fourth sprocket, andthe second sprocket carrier supports the third sprocket and the fourth sprocket.7. ...

Bicycle sprocket assembly

A bicycle sprocket assembly is basically provided with a first sprocket having a first pitch circle diameter, a second sprocket having a second pitch circle diameter, a third sprocket having a third pitch circle diameter, a fourth sprocket having a fourth pitch circle diameter, and a sprocket supporting member. At least one of the second and third sprockets is attached to the sprocket supporting member. The first sprocket is attached to the second sprocket so that the second sprocket is positioned between the first sprocket and the sprocket supporting member in an axial direction. The fourth sprocket is attached to the third sprocket so that the third sprocket is positioned between the sprocket supporting member and the fourth sprocket in the axial direction. The second sprocket is adjacent to the third sprocket without another sprocket positioned therebetween in the axial direction.

Multiple-sprocket arrangement for a bicycle gearing

A multiple-sprocket arrangement for mounting on a rear wheel axle of a bicycle includes a receiving body designed for mounting on the rear wheel axle, and a sprocket assembly. The sprocket assembly includes a first sprocket, the inner diameter of which is greater than an outer diameter of the receiving body and which is connected to the receiving body. The sprocket assembly further includes at least one second sprocket, the inner diameter of which is smaller than an outer diameter of the receiving body and which is designed in an unsupported manner and connected to the receiving body in a torque-transmitting manner by means of the first sprocket.

TRANSMISSION ELEMENT FOR THE TRANSMISSION OF TORQUE FROM A CHAIN WHEEL TO A WHEEL HUB

A transmission element for transferring torque from a set of sprockets to a bicycle rear wheel hub bearing-supported on a wheel axle is equipped with a first interface for coupling to the sprocket. This first interface is arranged such that it secures the sprocket or the cassette to the driver in axial and/or radial and/or tangential direction. The driver is furthermore equipped with a second interface for coupling to the sprocket. The second interface is arranged such that it secures the sprocket to the driver in axial and/or radial and/or tangential direction. The second interface is then present in a larger diameter than the first interface. 1. A transmission driver for transferring torque from a sprocket , which forms part of a set of sprockets , to a wheel hub bearing-supported on a wheel axle of a rear wheel of a bicycle ,the driver being equipped with an adapter for coupling to the wheel hub and a first interface for coupling to the sprocket,the first interface being arranged such that it secures the sprocket to the driver in axial and/or radial and/or tangential direction,wherein the driver is further equipped with a second interface for coupling to the sprocket, wherein the second interface is arranged such that it secures the sprocket to the driver in axial and/or radial and/or tangential direction and wherein the second interface is present in a relatively larger diameter than the first interface.2. The driver as claimed in claim 1 , wherein the driver is furthermore equipped with a third interface for coupling to the sprocket claim 1 , wherein the third interface is arranged such that it secures the sprocket to the driver in axial and/or radial and/or tangential direction claim 1 , and wherein the third interface is present in a relatively larger diameter than the second interface.3. The driver as claimed in claim 1 , wherein the first and/or second interface is configured to secure the sprocket in axial direction.4. The driver as claimed in claim 1 , ...

BICYCLE SPROCKET, BICYCLE REAR SPROCKET, AND BICYCLE MULTIPLE SPROCKET ASSEMBLY

A bicycle sprocket comprises a sprocket body, a plurality of sprocket teeth, and at least one chain-curvature limiting protuberance. The sprocket body is configured to be rotatable about a rotational center axis. The plurality of sprocket teeth extend radially outward from an outer periphery of the sprocket body. The at least one chain-curvature limiting protuberance is configured to limit axial curvature of a bicycle chain engaging with an independent neighboring bicycle sprocket which is adjacent to the bicycle sprocket without another sprocket between the bicycle sprocket and the independent neighboring bicycle sprocket. The axial curvature is curvature of the bicycle chain relative to the bicycle sprocket when viewed from a radial direction perpendicular to the rotational center axis. The at least one chain-curvature limiting protuberance is disposed on at least one of an outward facing side and an inward facing side. 1. A bicycle sprocket having a rotational center axis , an outward facing side facing in an axial direction parallel to the rotational center axis and an inward facing side facing in the axial direction , the inward facing side being opposite to the outward facing side in the axial direction , the bicycle sprocket comprising:a sprocket body configured to be rotatable about the rotational center axis;a plurality of sprocket teeth extending radially outward from an outer periphery of the sprocket body; andat least one chain-curvature limiting protuberance configured to limit axial curvature of a bicycle chain engaging with an independent neighboring bicycle sprocket which is adjacent to the bicycle sprocket without another sprocket between the bicycle sprocket and the independent neighboring bicycle sprocket, the axial curvature being curvature of the bicycle chain relative to the bicycle sprocket when viewed from a radial direction perpendicular to the rotational center axis, the at least one chain-curvature limiting protuberance being disposed on ...

Bicycle Chain Rings

A bicycle chain ring for engaging a chain link of a bicycle chain, the bicycle chain ring including an inner edge fully circumscribing both an opening and an axis of rotation, an inner surface extending between the inner edge and an outer edge where a plurality of chain ring teeth emanate, and a plurality of ramps disposed about the inner surface, wherein at least one of the plurality of ramps includes a lifting surface for initiating lift of a bicycle chain without assistance from the plurality of chain ring teeth. The lifting surface extends radially along the inner surface toward the outer edge, and the at least one ramp has a first end proximate the inner edge and a second end proximate the outer edge. The second end of the at least one lifting surface terminates before reaching the bottom of a trough positioned between two or more of the plurality of chain ring teeth. 1. A bicycle chain ring for engaging a chain link of a bicycle chain , the bicycle chain ring comprising:an inner edge fully circumscribing both an opening and an axis of rotation;an inner surface extending between the inner edge and an outer edge where a plurality of chain ring teeth emanate; anda plurality of ramps disposed about the inner surface, wherein at least one of the plurality of ramps includes a lifting surface for initiating lift of a bicycle chain without assistance from the plurality of chain ring teeth;wherein the lifting surface extends radially along the inner surface toward the outer edge, the at least one ramp having a first end proximate the inner edge and a second end proximate the outer edge; andwherein the second end of the at least one lifting surface terminates before reaching the bottom of a trough positioned between two or more of the plurality of chain ring teeth.2. The bicycle chain ring according to claim 1 , wherein the lifting surface is a linear lifting surface that extends perpendicularly from the inner surface and is configured to concurrently engage the chain ...

BICYCLE HUB ASSEMBLY

A bicycle hub assembly comprises a sprocket support body. The sprocket support body includes at least ten external spline teeth, a base support, and a larger-diameter part. The at least ten external spline teeth are configured to engage with a bicycle rear sprocket assembly. The at least ten external spline teeth radially outwardly extend from the base support. The larger-diameter part extends radially outwardly from the base support. Each of the at least ten external spline teeth has an external-spline driving surface and an external-spline non-driving surface. 1. A bicycle hub assembly comprising: at least ten external spline teeth configured to engage with a bicycle rear sprocket assembly,', 'a base support from which the at least ten external spline teeth radially outwardly extend, and', 'a larger-diameter part extending radially outwardly from the base support, each of the at least ten external spline teeth having an external-spline driving surface and an external-spline non-driving surface., 'a sprocket support body including'}2. The bicycle hub assembly according to claim 1 , whereina total number of the at least ten external spline teeth is equal to or larger than 20.3. The bicycle hub assembly according to claim 1 , whereinthe at least ten external spline teeth have a first external pitch angle and a second external pitch angle different from the first external pitch angle.4. The bicycle hub assembly according to claim 1 , whereinat least one of the at least ten external spline teeth has a first spline shape different from a second spline shape of another of the at least ten external spline teeth.5. The bicycle hub assembly according to claim 1 , whereinat least one of the at least ten external spline teeth has a first spline size different from a second spline size of another of the at least ten external spline teeth.6. The bicycle hub assembly according to claim 1 , whereinat least two external spline teeth of the at least ten external spline teeth are ...

ADAPTER FOR A SPROCKET-CARRYING BODY FOR A BICYCLE REAR WHEEL

A bicycle rear wheel adapter has an annular body that abuts a sprocket-carrying body that extends in an axially outer direction and receives sprockets in radially peripheral positions. A coupling element on the annular body couples with the sprocket-carrying body so the adapter rotates as a unit with the sprocket-carrying body, and a sprocket-receiving seat on the annular body couples with a sprocket so the adapter rotates as a unit with the sprocket. The adapter is suitable for cogsets with small sprockets grouped in a monolithic grouping. 1. An adapter for a sprocket-carrying body for a bicycle rear wheel , the adapter comprising: an annular body configured to abut a sprocket-carrying body and extend in an axially outer direction and to receive sprockets in a radially peripheral position; a coupling element formed on the annular body as a shape coupling with the sprocket-carrying body so the adapter rotates as a unit with the sprocket-carrying body; and at least one sprocket-receiving seat formed on the annular body that couples with at least one sprocket so the adapter rotates as a unit with the sprocket.2. The adapter according to claim 1 , wherein the coupling element comprises at least one front tooth projecting axially from the annular body and dimensioned for insertion in a selected groove in the sprocket-carrying body.3. The adapter according to claim 1 , wherein the coupling element comprises four front teeth projecting axially from the annular body and dimensioned for insertion in a respected selected groove in the sprocket-carrying body.4. The adapter according to claim 3 , wherein the four front teeth are equally spaced in a circumferential direction.5. The adapter according to claim 1 , wherein the coupling element comprises a mounting key for ensuring a predetermined angular phasing of the adapter with respect to the sprocket-carrying body.6. The adapter according to claim 1 , wherein the sprocket receiving seat comprises at least one axially- ...

SUB-ASSEMBLY SPROCKET-CARRYING BODY AND COGSET FOR A BICYCLE REAR WHEEL

This sub-assembly for a bicycle rear wheel, formed by a sprocket-carrying body () and a cogset () mounted coaxially on the sprocket-carrying body () through shape engagement, is sized so as to respect the condition: 1142014201614. A sub-assembly for a bicycle rear wheel , the sub-assembly comprising a sprocket-carrying body () and a cogset () mounted coaxially on the sprocket-carrying body () through shape engagement of the cogset () on a coupling profile () formed on a radially peripheral surface of the sprocket-carrying body () and extending in an axial direction ,wherein transversal planes A, B, C, and D are defined perpendicular to a common axis (X) of the sprocket-carrying body and of the cogset:{'b': 14', '20', '14, 'plane A is a plane of the sprocket-carrying body () at an axial abutment position of the cogset () on the sprocket-carrying body ();'}{'b': '14', 'plane B is a plane at an axially outer bulk end of the sprocket-carrying body () opposite to the plane A;'}{'b': 26', '20', '20, 'i': 'c', 'plane C is a plane at an axially outer bulk face of the smallest sprocket () of the cogset () that faces away from the cogset ();'}{'b': 21', '20', '20, 'i': 'a', 'plane D is a plane at an axially inner bulk face of the largest sprocket () of the cogset () that faces away from the cogset ();'}{'b': 20', '14, 'wherein mounting the cogset () on the sprocket-carrying body () results in the defined following lengths along the common axis (X){'b': '14', 'Lc is a length of the sprocket-carrying body () between the plane B and the plane A;'}{'b': 16', '14, 'Ls is an axial length of the coupling profile () on the sprocket-carrying body ();'}{'b': '20', 'Lp is a length of the cogset () between the plane C and the plane D;'}{'b': 14', '20, 'Sint is an inner overhang equal to a distance between the plane A of the sprocket-carrying body () and the plane D of the cogset () that is positive when plane A is axially outside of plane B;'}{'b': 14', '20, 'Sest is an outer overhang ...

SPROCKET-CARRYING BODY AND SUB- ASSEMBLY OF SPROCKET-CARRYING BODY AND COGSET FOR A BICYCLE REAR WHEEL

A cogset with a plurality of sprockets has a subset of the sprockets connected together in a monolithic subset that is mounted directly in engagement with a coupling profile on the radially peripheral surface of a sprocket in the monolithic subset. The direct shape coupling between the sprocket of the monolithic subset and the sprocket-carrying body makes it possible to have very high solidity and rigidity of coupling to ensure the maximum precision of actuation of the gearshift that uses the sub-assembly. 1. A cogset for a bicycle rear wheel , adapted for being mounted coaxially on a sprocket-carrying body , the cogset comprising a plurality of axially adjacent sprockets between a first having a minimum number of teeth and a last sprocket having a maximum number of teeth , wherein a first plurality of “n” sprockets , where the range of “n” is 6≥n≥3 , are fixedly connected together in a monolithic set , and wherein the monolithic is adapted for direct engagement on a coupling profile formed on a radially peripheral surface of a sprocket-carrying body through a coupling profile formed on a radially inner surface of at least the largest sprocket of the monolithic set.2. The cogset according to claim 1 , wherein the first sprocket in the monolithic set has 10 teeth.3. The cogset according to claim 1 , wherein the first sprocket in the monolithic set has 9 teeth.4. The cogset according to claim 1 , wherein the first sprocket in the monolithic set has 8 teeth.5. The cogset according to claim 1 , wherein n=3.6. The cogset according to claim 1 , wherein n=4.7. The cogset according to claim 1 , wherein n=5 and the coupling profile between the monolithic set and the sprocket-carrying body is formed on a radially inner surface of the two largest sprockets of the monolithic set.8. The cogset according to claim 1 , wherein n=6 and the coupling profile between the monolithic set and the sprocket-carrying body is formed on a radially inner surface of the three largest sprockets ...

Chain-rings set for a power transmission system provided with segmented chain-rings in different planes

Chain-rings set, for a power transmission system, which includes a chain, a first chain-ring, a second chain-ring where the first chain-ring is formed by a support part of the teeth and a teeth part, where the second chain-ring is formed by segments each formed by a support part of the teeth and a teeth part, which includes axial displacement means of the segments, where an up-shift segment of the segments has a first tooth which is the first which is engaged with the chain in the rotation movement, and where the displacement means are configured for moving the up-shift segment to an engaging position such that the first tooth can engage with an engaging link of the up-shift section of the chain, when the chain is engaged in the small chain-ring, and without the support part of the up-shift segment reaching the same plane than the support part of the first chain-ring, and to successively displace the other independent segments to an engaging position with the chain without the support parts of the independent segments reaching the same plane than the support part of the first chain-ring.

Chain-rings set for a bicycle power transmission system provided with segmented chain-ring and segmentation method for obtaining it

Chain-rings sets for power transmission systems, where at least one of the chain-rings is formed by independent segments provided with axial displacement means, where the segmentation is optimum both for shifts to a bigger chain-ring or a smaller chain-ring through a relative configuration between chain-rings, especially between the teeth involved in the power transmission during the shift, that ensure a smooth shift, efficient in the power transmission and reducing as possible the friction and the wear of the components.

ELECTRIC MOTORCYCLE WITH IMPROVED MOTOR PERFORMANCE

An electric motorcycle includes an electric motor, a motor controller for controlling the operation of the electric motor, a gearbox that can be of a used or new fuel engine-based vehicle and rotatable by the electric motor, and a main drive shaft coupled between the electric motor and the gearbox. Subject to the optimal power transmission performance of the gearbox, the electric motor is capable of producing the most appropriate driving speed in the starting state or any of a variety of travelling state, achieving optimal output efficiency and significantly reducing power consumption and enhancing endurance. 1. An electric motorcycle , comprising a power transmission system , said power transmission system comprising an electric motor , a motor controller adapted for controlling the operation of said electric motor , a gearbox , and a main drive shaft coupled between said electric motor and said gearbox , wherein said main drive shaft has one end thereof fixedly mounted with a belt gear and coupled to said electric motor through a transmission belt , and an opposite end thereof fixedly mounted with a main drive gear; said gearbox comprising a power input gear located at a power input end thereof and meshed with said main drive gear , a speed change gear set , a clutch coupled between said power input gear and said speed change gear set for controlling the rotating speed of said power input gear and the linking between said power input gear and said speed change gear set , said speed change gear set comprising a tachometer output sprocket located at an opposing output end thereof for driving a rear wheel of the electric motorcycle to rotate; the power transmission system further comprises a pitch shifting pedal for controlling the desired gear shift position , and a clutch lever mounted on a handlebar of the electric motorcycle for moving said clutch between a connected position and a disconnected position.2. The electric motorcycle as claimed in claim 1 , further ...

Bicycle sprocket

A bicycle sprocket comprises a sprocket body, a plurality of sprocket teeth, a mounting member, at least one fastening member, and a cover member. The sprocket body has at least one first threaded portion. The mounting member has at least one fastening hole configured to be aligned with the at least one first threaded portion in the assembled state. The at least one fastening member has a fastening shaft portion, a fastening head portion, and a second threaded portion. The second threaded portion is configured to threadedly engage with the at least one first threaded portion of the sprocket body in the assembled state. The cover member is configured to at least cover the fastening shaft portion of the at least one fastening member when viewed from an axial direction with respect to the rotational center axis in the assembled state.

MULTI-SPROCKET ARRANGEMENT FOR A BICYCLE

A multi-sprocket arrangement for installation on a rear wheel axle of a bicycle includes a sprocket assembly. The sprocket assembly has at least a first sprocket and a second, self-supporting sprocket. The second sprocket is connected to a holding body via the first sprocket by way of a separate, cylindrical fastener which extends parallel to the rear wheel axle. The fastener has a first and a second end which are connected in frictionally fit fashion to drilled holes in the first and second sprockets. The frictionally fit connection between the fastener and the drilled holes of the sprockets prevents an axial movement of the first and second sprockets toward one another. The fastener is additionally connected, at the first and second ends, in form-fitting fashion, to the first and second sprockets such that an axial movement of the first and second sprockets away from one another is also reliably prevented. 1. A multi-sprocket arrangement for installation on a rear wheel axle of a bicycle , having:a holding body configured for installation on the rear wheel axle; and a first sprocket, fixable radially and axially to the holding body; and', has a cylindrical shape;', 'has a first end and a second end;', 'extends parallel to the rear wheel axle;', 'is frictionally fit into holes in the first and second sprockets such that axial movement of the first sprocket and of the second sprocket toward one another is prevented; and', 'is additionally connected, at the first and second ends, in form-fitting fashion to the first and second sprockets such that axial movement of the first sprocket and of the second sprocket away from one another is prevented., 'a second sprocket, which is of self-supporting design, and which is connected to the holding body via the first sprocket by way of a separate fastener, wherein the fastener], 'a sprocket assembly having2. The multi-sprocket arrangement according to claim 1 , wherein the fastener further comprises a central part having a ...

BICYCLE CHAIN GUIDE WITH HEIGHT ADJUSTMENT

A chain guide for a bicycle having may include a base frame and a height adjustment member connected to the base frame and slidable relative to the base frame and lockable in a first position by engaging a first locking member. A retaining member may be pivotally connected to the height adjustment member and may be pivotable about a pivot axis a retaining position, in which the retaining member is positioned to obstruct lateral movement of the chain away from the chainring thereby preventing lateral misalignment between the chain and the chainring, and a removal position, in which the retaining member does not obstruct lateral movement of the chain away from the base frame while the height adjustment member is locked in the first position. The pivot axis may be spaced apart from the first locking member. 1. A chain guide for a bicycle having a chainring and a chain , the chain guide comprising:a) a base frame having a mounting portion for connecting to a bicycle;b) a height adjustment member connected to the base frame and slidable relative to the base frame whereby the height adjustment member is movable relative to the base frame and is lockable in a first position by engaging a first locking member;c) a retaining member pivotally connected to the height adjustment member and being pivotable about a pivot axis that is spaced apart from the first locking member while the height adjustment member is locked in the first position, and wherein the retaining member is lockable in a retaining position by engaging a second locking member that extends through at least a portion of the retaining member, and wherein the second locking member is spaced apart from the first locking member and can be engaged and disengaged independent of whether the first locking member is engaged or disengaged;wherein when the base frame is connected to the bicycle with the height adjustment member locked in the first position and the retaining member positioned proximate a periphery of the ...

BICYCLE SPROCKET ASSEMBLY AND BICYCLE SPROCKET

A bicycle sprocket assembly comprises a first sprocket and a second sprocket. The first sprocket includes a plurality of first sprocket teeth, a first sprocket inward surface, a first sprocket outward surface, and an axial space. The second sprocket includes a plurality of second sprocket teeth, a second sprocket inward surface, and a second sprocket outward surface. The axial space is defined between the first sprocket outward surface and an axially inward outer link plate in the axial direction while the second sprocket outward surface contacts an axially outward inner link plate in an engagement state where the one of the plurality of the second sprocket teeth is positioned between an axially inward inner link plate and the axially outward inner link plate in the axial direction. The axial space is larger than 0 mm and equal to or smaller than 0.15 mm. 1. A bicycle sprocket assembly comprising: a first sprocket body;', 'a plurality of first sprocket teeth disposed on an outer periphery of the first sprocket body, the plurality of first sprocket teeth defining a first maximum tooth-tip diameter;', 'a first sprocket inward surface configured to face toward an axial center plane of a bicycle in a mounting state where the bicycle sprocket assembly is mounted to the bicycle; and', 'a first sprocket outward surface provided on a reverse side of the first sprocket inward surface in an axial direction with respect to a rotational center axis of the bicycle sprocket, and, 'a first sprocket including a second sprocket body;', 'a plurality of second sprocket teeth disposed on an outer periphery of the second sprocket body, the plurality of second sprocket teeth defining a second maximum tooth-tip diameter smaller than the first maximum tooth-tip diameter;', 'a second sprocket inward surface configured to face toward the axial center plane of the bicycle in the mounting state; and', 'a second sprocket outward surface provided on a reverse side of the second sprocket inward ...

BICYCLE HUB ASSEMBLY

A bicycle hub assembly comprises a hub axle, a hub body, and a sprocket support body. The hub body includes a first spoke-mounting portion, a second spoke-mounting portion, and a first axial length. The first axial length is defined between a first axially outermost part of the first spoke-mounting portion and a second axially outermost part of the second spoke-mounting portion in an axial direction with respect to a rotational center axis. The first axial length is equal to or larger than 55 mm. The sprocket support body is rotatably mounted on the hub axle about the rotational center axis. The sprocket support body includes at least ten external spline teeth configured to engage with a bicycle rear sprocket assembly. Each of the at least ten external spline teeth has an external-spline driving surface and an external-spline non-driving surface. 1. A bicycle hub assembly comprising:a hub axle; a first spoke-mounting portion having a first axially outermost part;', 'a second spoke-mounting portion having a second axially outermost part; and', 'a first axial length defined between the first axially outermost part of the first spoke-mounting portion and the second axially outermost part of the second spoke-mounting portion in an axial direction with respect to the rotational center axis, the first axial length being equal to or larger than 55 mm; and, 'a hub body rotatably mounted on the hub axle about a rotational center axis of the bicycle hub assembly, the hub body includinga sprocket support body rotatably mounted on the hub axle about the rotational center axis, the sprocket support body including at least ten external spline teeth configured to engage with a bicycle rear sprocket assembly, each of the at least ten external spline teeth having an external-spline driving surface and an external-spline non-driving surface.2. The bicycle hub assembly according to claim 1 , whereinthe first axial length is equal to or larger than 60 mm.3. The bicycle hub assembly ...

CHAINRING

A bicycle chainring includes a plurality of teeth extending from a periphery of the chainring wherein roots of the plurality of teeth are disposed adjacent the periphery of the chainring. The plurality of teeth include a first group of teeth and a second group of teeth, each of the first group of teeth wider than each of the second group of teeth. At least some of the second group of teeth arranged alternatingly and adjacently between the first group of teeth, and at least some of the first and/or second group of teeth being asymmetric along the chainring circumference. 1. A bicycle chainring for engagement with a drive chain , comprising:a plurality of teeth extending from a periphery of the chainring wherein roots of the plurality of teeth are disposed adjacent the periphery of the chainring;the plurality of teeth including a first group of teeth and a second group of teeth, each of the first group of teeth wider than each of the second group of teeth;at least some of the second group of teeth arranged alternatingly and adjacently between the first group of teeth; andat least some of the first and second group of teeth being asymmetric about a radial tooth centerline along the direction of the chainring circumference.2. The bicycle chainring of claim 1 , wherein each of the plurality of teeth includes an outboard side and an inboard side opposite the outboard side and each of the first group of teeth includes at least a first protrusion on one of the outboard side and the inboard side and each of the second group of teeth are free of the first protrusion; andwherein the first protrusion is asymmetrically disposed on a side of the first group of teeth along the direction of the chainring circumference.3. The bicycle chainring of claim 2 , wherein each of the first and second group of teeth include a front flank and a rear flank; andwherein the first protrusion is asymmetrically disposed on a side of the first group of teeth along the direction of the chainring ...

Chainring

A bicycle chainring includes a plurality of teeth extending from a periphery of the chainring wherein roots of the plurality of teeth are disposed adjacent the periphery of the chainring. The plurality of teeth including a first group of teeth and a second group of teeth, each of the first group of teeth wider than each of the second group of teeth. At least some of the second group of teeth are arranged alternatingly and adjacently between the first group of teeth, each of the plurality of teeth includes an outboard side and an inboard side opposite the outboard side and one of the inboard and outboard sides of each of the second group of teeth includes a link-receiving recess formed in the chainring.

Chainring

A bicycle chainring includes a plurality of teeth extending from a periphery of the chainring wherein roots of the plurality of teeth are disposed adjacent the periphery of the chainring. The plurality of teeth include a first group of teeth and a second group of teeth, each of the first group of teeth wider than each of the second group of teeth, and at least some of the second group of teeth arranged alternatingly and adjacently between the first group of teeth, wherein the center of a top land of at least some of the first and second groups of teeth are offset from a plane in a direction toward one of the inboard and outboard sides of the chainring.

MULTI-SPROCKET ASSEMBLY FOR A BICYCLE

A multi-sprocket arrangement for a rear wheel hub of a bicycle may have improved gearshift characteristics, reduced vibrations during skewed running, and improved wear characteristics. The multi-sprocket arrangement includes a multiplicity of sprockets of different diameters, wherein at least one of the sprockets has a multiplicity of teeth. Also on the circumference of said sprocket, as viewed in a circumferential direction, at least one sequence of teeth is provided in which, with regard to their material thickness, a thin tooth is followed by a thick tooth which is followed in turn by another thin tooth. 1. A multi-sprocket arrangement for a rear wheel hub of a bicycle , the multi-sprocket arrangement comprising:a plurality of sprockets of different diameters, wherein at least one of the plurality of sprockets has a plurality of teeth on the circumference of said sprocket, the plurality of teeth including a thin tooth followed by a thick tooth with the thick tooth followed in turn by another thin tooth in series, andwherein, on said sprocket of the plurality of sprockets, there is provided at least one gearshift path that permits a shift between two adjacent sprockets,wherein the thick tooth is thickened only on one side as viewed in an axial direction.2. The multi-sprocket arrangement of claim 1 , wherein the thick tooth is thickened only on a first side of the thick tooth claim 1 , the first side opposite a second side of the thick tooth claim 1 , the second side facing a sprocket of relatively small diameter.3. The multi-sprocket arrangement of claim 1 , wherein on said sprocket of the plurality of sprockets claim 1 , there is provided at least one impression and/or a passage recess that forms the at least one gearshift path that permits a shift between two adjacent sprockets.4. The multi-sprocket arrangement of claim 1 , wherein the series of teeth is repeated at least two times along the circumferential direction of the at least one sprocket.5. The multi- ...

BICYCLE SPROCKET

A bicycle sprocket has a rotational center axis. The bicycle sprocket comprises a sprocket body, a plurality of sprocket teeth, and at least one chain-supporting portion. The plurality of sprocket teeth are circumferentially arranged on an outer periphery of the sprocket body. The at least one chain-supporting portion is configured to contact one of inner link plates of a bicycle chain without engaging with the bicycle chain at inner link spaces each defined between a pair of inner link plates that face each other in an axial direction parallel to the rotational center axis. The at least one chain-supporting portion is offset from the sprocket teeth in the axial direction. 1. A bicycle sprocket having a rotational center axis , the bicycle sprocket comprising:a sprocket body;a plurality of sprocket teeth circumferentially arranged on an outer periphery of the sprocket body; andat least one chain-supporting portion configured to contact one of inner link plates of a bicycle chain without engaging with the bicycle chain at inner link spaces each defined between a pair of inner link plates that face each other in an axial direction parallel to the rotational center axis, the at least one chain-supporting portion being offset from the sprocket teeth in the axial direction.2. The bicycle sprocket according to the claim 1 , whereinthe at least one chain-supporting portion includes a plurality of chain-supporting portions each configured to contact one of the inner link plates of the bicycle chain without engaging with the bicycle chain at the inner link spaces each defined between the pair of inner link plates that face each other in the axial direction.3. The bicycle sprocket according to the claim 1 , whereinthe bicycle sprocket has a first axial side and a second axial side opposite to the first axial side, andthe at least one chain-supporting portion is positioned closer to one of the first axial side and the second axial side than the other of the first axial side ...

BICYCLE CASSETTE WITH CLAMPING CONNECTION

A bicycle cassette comprises a clampstyle connection for connecting the bicycle cassette to a bicycle hub driver body. The bicycle cassette is attached to a bicycle hub driver body by incorporating a clamp structure into one portion of the cassette, which then rigidly clamps onto the driver body of the bicycle hub. In addition, when combined with a bayonet style attachment structure between two parts of the cassette, it allows for the use of a smaller sprocket on one segment of the cassette. Specifically, it allows a small 9 or 10 tooth sprocket to overhang the cassette driver body on a bicycle hub, by attaching the small cog assembly to a larger cog assembly using a bayonet style attachment. 1. A bicycle cassette comprising:a. a large sprocket sub-assembly comprising a clamping mechanism for attaching the large sprocket sub-assembly to a rear bicycle hub; andb. a small sprocket sub-assembly, wherein the small sprocket sub-assembly rotatably couples with and locks to the large sprocket sub-assembly after the large sprocket assembly is clamped to the rear bicycle hub to form the bicycle cassette.2. The bicycle cassette of claim 1 , wherein the large sprocket sub-assembly clamps to the rear bicycle hub by tightening a clamp screw.3. The bicycle cassette of claim 1 , wherein the small sprocket sub-assembly is coupled to the large sprocket assembly using a locking bayonet style attachment.4. The bicycle cassette of claim 1 , wherein the small sprocket sub-assembly comprises a 9 tooth sprocket.5. The bicycle cassette of claim 1 , wherein the small sprocket sub-assembly comprises a 10 tooth sprocket.6. The bicycle cassette of claim 1 , wherein the large sprocket sub-assembly comprises a 46 tooth sprocket.7. The bicycle cassette of claim 1 , wherein the large sprocket sub-assembly comprises a 50 tooth sprocket.8. The bicycle cassette of claim 1 , wherein the large sprocket sub-assembly and the small sprocket assembly are manufactured from different materials.9. The bicycle ...

BICYCLE SPROCKET AND BICYCLE SPROCKET ASSEMBLY

A bicycle sprocket has a rotational center axis. The bicycle sprocket comprises a sprocket body and a chain engagement structure. The sprocket body has an axial width defined in an axial direction parallel to the rotational center axis. The chain engagement structure is arranged on a radially outer periphery of the sprocket body. The chain engagement structure includes at least one shifting facilitation area and a plurality of chain-engaging teeth. The at least one shifting facilitation area is configured to facilitate changing gears. The plurality of chain-engaging teeth include at least two neighboring chain-engaging teeth each including a chain-engaging portion configured to engage with a bicycle chain. The chain-engaging portion has an axial chain-engaging width defined in the axial direction. The axial chain-engaging width is larger than the axial width of the sprocket body. 1. A bicycle sprocket having a rotational center axis , the bicycle sprocket comprising:a sprocket body having an axial width defined in an axial direction parallel to the rotational center axis; and at least one shifting facilitation area configured to facilitate changing gears; and', 'a plurality of chain-engaging teeth including at least two neighboring chain-engaging teeth each including a chain-engaging portion configured to engage with a bicycle chain, the chain-engaging portion having an axial chain-engaging width defined in the axial direction, the axial chain-engaging width being larger than the axial width of the sprocket body., 'a chain engagement structure arranged on a radially outer periphery of the sprocket body, the chain engagement structure including2. The bicycle sprocket according to the claim 1 , whereinthe at least one shifting facilitation area includes an axially recessed portion.3. The bicycle sprocket according to the claim 1 , whereinthe at least one shifting facilitation area includes a tooth-free gap from which an additional chain-engaging tooth is free between ...

BICYCLE SPROCKET AND BICYCLE SPROCKET ASSEMBLY

A bicycle sprocket having a rotational center axis comprises a sprocket body and a chain engagement structure. The sprocket body is rotatable about the rotational center axis. The chain engagement structure includes an upshifting facilitation area configured to facilitate upshifting. The chain engagement structure includes a plurality of chain-engaging teeth configured to engage with a bicycle chain. The plurality of chain-engaging teeth includes at least three upshifting facilitation teeth configured to facilitate upshifting. The at least three upshifting facilitation teeth are adjacent to each other without another tooth between the at least three upshifting facilitation teeth. The at least three upshifting facilitation teeth are provided in the upshifting facilitation area. 1. A bicycle sprocket having a rotational center axis , the bicycle sprocket comprising:a sprocket body rotatable about the rotational center axis; anda chain engagement structure including an upshifting facilitation area configured to facilitate upshifting, the chain engagement structure including a plurality of chain-engaging teeth configured to engage with a bicycle chain, the plurality of chain-engaging teeth including at least three upshifting facilitation teeth configured to facilitate upshifting, the at least three upshifting facilitation teeth being adjacent to each other without another tooth between the at least three upshifting facilitation teeth, the at least three upshifting facilitation teeth being provided in the upshifting facilitation area.2. The bicycle sprocket according to claim 1 , whereinthe upshifting facilitation area includes an upshifting recessed portion recessed in an axial direction parallel to the rotational center axis.3. The bicycle sprocket according to claim 2 , further comprising:a first axial side configured to face in the axial direction; anda second axial side configured to face in the axial direction and opposite to the first axial side in the axial ...

BICYCLE MULTI-GEAR CASSETTE

A bicycle multi-gear cassette mountable to a wheel hub driver mechanism that includes truncated conical shell having a first opening proximate a small shell base and a second opening proximate a large shell base. The openings are coaxial with an axis of the shell. A plurality of toothed sprockets having different numbers of teeth are disposed on the shell and extend radially of the central axis. A torque load transmitting profile is configured on the shell proximate one of the small and large shell bases. A radial load transmitting profile is configured on the shell proximate one of the small and large shell bases. The shell, sprockets, and the load transmitting profiles embody a single piece. 1. A bicycle multi-gear cassette mountable to a wheel hub , the cassette comprising:a truncated conical shell having a first opening proximate a small shell base and a second opening proximate a large shell base, the openings coaxial with a central axis of the shell, the first opening proximate the small shell base receiving the wheel hub;a plurality of toothed sprockets having different numbers of teeth disposed on the shell and extending radially of the central axis;a torque load transmitting profile configured on the shell proximate one of the small and large shell bases;a first radial load transmitting profile configured on the shell proximate the large shell base transmitting radial load to the wheel hub;a cap member extending radially of the shell axis and non-rotatably coupled to the radial load transmitting profile proximate the large shell base, the cap member including a third opening coaxial with the shell axis and proximate the large shell base, the third opening receiving the wheel hub;a second radial load transmitting profile configured at the third opening transmitting radial load to the wheel hub; anda third radial load transmitting profile configured at the first opening and transmitting radial load to the wheel hub,wherein the shell, sprockets, and the first ...

CASSETTE AND BICYCLE WHEEL ASSEMBLY

A cassette for a bicycle may include a plurality of sprocket portions joined together into a single unit. The cassette may include a cavity formed in the large end of the cassette. A related manufacturing method may include joining a first generally planar sprocket portion having a plurality of connector portions extending transverse to the plane of the first sprocket portion, to a second generally planar sprocket portion, e.g., by fusing at least one of the connector portions to the second sprocket portion. 1. A method for making a cassette for a bicycle , the method comprising:forming a generally planar and annular first sprocket portion defining a plane;forming a plurality of connector portions around a first inner diameter (ID) of the first sprocket portion, each of the connector portions being formed of a single piece with the first sprocket portion and extending transverse to the plane of the first sprocket portion; andjoining the first sprocket portion to a second generally planar sprocket portion by affixing at least one of the connector portions to the second sprocket portion;wherein the second sprocket portion is generally annular and has a second ID sized differently from the first ID.2. The method of claim 1 , wherein forming the first sprocket portion includes stamping a blank of the first sprocket portion from a metal plate.3. The method of claim 1 , wherein affixing the at least one connector portion to the second sprocket portion includes coalescing.4. The method of claim 3 , wherein affixing the at least one connector portion to the second sprocket portion includes welding.5. The method of claim 1 , wherein the first sprocket portion has a first plurality of teeth spaced about a first outer diameter (OD) claim 1 , and the second sprocket portion has a second plurality of teeth spaced about a second OD claim 1 , the second OD being sized differently from the first OD and each tooth in the first and second pluralities of teeth being substantially ...

BICYCLE REAR SPROCKET ASSEMBLY AND BICYCLE REAR SPROCKET

A bicycle rear sprocket assembly comprises a sprocket support member, a first sprocket attachment portion, and a second sprocket attachment portion. The sprocket support member comprises a first support member and a second support member. The first support member includes a first radially outer portion and a first radially inner portion. The second support member includes a second radially outer portion and a second radially inner portion. The first support member faces the second support member in the axial direction to define an axial gap provided between the first support member and the second support member in the axial direction. A first sprocket is to be attached to the first sprocket attachment portion. A second sprocket is to be attached to the second sprocket attachment portion. 1. A bicycle rear sprocket assembly comprising: a first support member including a first radially outer portion and a first radially inner portion, the first support member at least partly constituting the first axial side; and', 'a second support member including a second radially outer portion and a second radially inner portion, the second support member at least partly constituting the second axial side, the first radially outer portion of the first support member being configured to be attached to the second radially outer portion of the second support member, the first support member facing the second support member in the axial direction to define an axial gap provided between the first support member and the second support member in the axial direction;, 'a sprocket support member rotatable about a rotational center axis, the sprocket support member having a first axial side and a second axial side opposite to the first axial side in an axial direction parallel to the rotational center axis, the sprocket support member comprisinga first sprocket attachment portion to which a first sprocket is to be attached, the first sprocket attachment portion being provided at the first ...

BICYCLE CASSETTE WITH LOCKING CONNECTION

A bicycle cassette comprises two segments that are attached together thereby forming a composite cassette that can be attached to a rear bicycle hub driver body. The bicycle cassette allows for the use of a smaller sprocket on one segment of the cassette because the smaller sprockets can overhang the hub driver body. Specifically, the cassette allows a small 9 or 10 tooth sprocket to overhang the cassette driver body on the bicycle hub by attaching a small sprocket assembly to a larger sprocket assembly using a locking, bayonet style attachment. 1. A bicycle cassette comprising:a. a large sprocket assembly; andb. a small sprocket assembly,wherein the small sprocket assembly rotatably couples with and locks to the large sprocket assembly to form the bicycle cassette.2. The bicycle cassette of claim 1 , wherein the small sprocket assembly is coupled to the large sprocket assembly using a locking bayonet style attachment.3. The bicycle cassette of claim 2 , wherein the small sprocket couples with one or more locking flanges of the large sprocket assembly.4. The bicycle cassette of claim 1 , wherein the small sprocket assembly comprises a 9 tooth sprocket.5. The bicycle cassette of claim 1 , wherein the small sprocket assembly comprises a 10 tooth sprocket.6. The bicycle cassette of claim 1 , wherein the large sprocket assembly comprises a 42 tooth sprocket.7. The bicycle cassette of claim 1 , wherein the large sprocket assembly comprises a 44 tooth sprocket.8. The bicycle cassette of claim 1 , wherein the large sprocket assembly and the small sprocket assembly are manufactured from different materials.9. The bicycle cassette of claim 8 , wherein larger sprocket assembly is manufactured from aluminum and the small sprocket assembly is manufactured from one of steel and titanium.10. The bicycle cassette of claim 1 , wherein the bicycle cassette attaches to a hub driver body using a single locking ring.11. A bicycle cassette and hub system comprising;a. a rear bicycle hub ...

BICYCLE REAR SPROCKET ASSEMBLY

A bicycle rear sprocket assembly comprises a sprocket support and a first sprocket. The sprocket support includes a hub engagement part configured to engage with a bicycle hub assembly. The sprocket support includes a plurality of sprocket attachment members extending radially outwardly from the hub engagement part with respect to a rotational center axis of the bicycle rear sprocket assembly. The first sprocket is attached to the plurality of sprocket attachment members. The first sprocket includes a first sprocket body and a plurality of first sprocket teeth which extends radially outwardly from the first sprocket body with respect to the rotational center axis and a total number of which is equal to or larger than thirty-four. The first sprocket has a plurality of shifting facilitation areas. A total number of the plurality of shifting facilitation areas is a divisor of a total number of the plurality of sprocket attachment members. 1. A bicycle rear sprocket assembly comprising:a sprocket support including a hub engagement part configured to engage with a bicycle hub assembly, the sprocket support including a plurality of sprocket attachment members extending radially outwardly from the hub engagement part with respect to a rotational center axis of the bicycle rear sprocket assembly; anda first sprocket attached to the plurality of sprocket attachment members, the first sprocket including a first sprocket body and a plurality of first sprocket teeth which extend radially outwardly from the first sprocket body with respect to the rotational center axis and a total number of which is equal to or larger than thirty-four, the first sprocket having a plurality of shifting facilitation areas, a total number of the plurality of shifting facilitation areas being a divisor of a total number of the plurality of sprocket attachment members.2. A bicycle rear sprocket assembly comprising:a sprocket support including a hub engagement part configured to engage with a bicycle ...

BICYCLE REAR SPROCKET ASSEMBLY

A bicycle rear sprocket assembly comprises a first sprocket, a second sprocket, and a sprocket support. The first sprocket includes a first sprocket body and a plurality of first sprocket teeth. The first sprocket body has at least one first recess. The second sprocket includes a second sprocket body and a plurality of second sprocket teeth. The sprocket support is configured to engage with a bicycle hub assembly. The sprocket support includes a sprocket attachment part. The first sprocket and the second sprocket are attached to the sprocket attachment part. The sprocket attachment part is at least partly provided in the at least one first recess to transmit a rotational force between the first sprocket and the sprocket support. 1. A bicycle rear sprocket assembly comprising:a first sprocket including a first sprocket body and a plurality of first sprocket teeth extending radially outwardly from the first sprocket body with respect to a rotational center axis of the bicycle rear sprocket assembly, the first sprocket body having at least one first recess;a second sprocket including a second sprocket body and a plurality of second sprocket teeth extending radially outwardly from the second sprocket body with respect to the rotational center axis; anda sprocket support configured to engage with a bicycle hub assembly, the sprocket support including a sprocket attachment part, the first sprocket and the second sprocket being attached to the sprocket attachment part, the sprocket attachment part being at least partly provided in the at least one first recess to transmit a rotational force between the first sprocket and the sprocket support.2. The bicycle rear sprocket assembly according to claim 1 , whereinthe at least one first recess includes a first circumferential surface and a first additional circumferential surface spaced apart from the first circumferential surface in a circumferential direction with respect to the rotational center axis, andthe sprocket ...

Sprocket carrier and multiple sprocket arrangement

A multiple sprocket arrangement for rotatable mounting on a rear wheel axle may include a sprocket carrier. The sprocket carrier has a substantially uniform material thickness. The multiple sprocket arrangement includes smaller sprockets and larger sprockets. The sprocket carrier is formed so that at least three larger sprockets can be fastened to the carrier.

BICYCLE SPROCKET ASSEMBLY

Example bicycle sprocket assemblies are described herein. An example sprocket assembly includes a cassette formed by a plurality of sprockets arranged in increasing diameter order from a first end to a second end of the cassette opposite the first end. The cassette has a passageway extending between a first opening in the first end and a second opening in the second end to receive a driver hub. An outboard portion of the passageway is formed between a midpoint of the cassette and the first end of the cassette. The cassette further includes a torque transmitting profile located within the outboard portion of the passageway to interface with the driver hub. The sprocket assembly also includes a bushing to be disposed within the second opening to form a non-torque transmitting interface between the second end of the cassette and the driver hub. 1. A sprocket assembly comprising:a cassette formed by a plurality of sprockets arranged in increasing diameter order from a first end of the cassette to a second end of the cassette opposite the first end, the cassette having a passageway extending between a first opening in the first end and a second opening in the second end to receive a driver hub, the first and second openings being coaxial with a central axis of the cassette, an outboard portion of the passageway formed between a midpoint of the cassette and the first end of the cassette, and an inboard portion of the passageway formed between the midpoint of the cassette and the second end of the cassette, the cassette including a torque transmitting profile located within the outboard portion of the passageway to interface with the driver hub; anda bushing to be disposed within the second opening to form a non-torque transmitting interface between the second end of the cassette and the driver hub.2. The sprocket assembly of claim 1 , wherein the bushing is an elongated sleeve having an inner surface and an outer surface.3. The sprocket assembly of claim 2 , wherein the ...

BICYCLE SPROCKET AND MULTIPLE BICYCLE SPROCKET ASEMBLY

A bicycle sprocket has a sprocket main body, a plurality of teeth disposed on the sprocket main body, and at least one shifting area. The teeth include at least one first tooth having a first maximum axial width and at least one second tooth having a second maximum axial width. The first maximum axial width is larger than the second maximum axial width. The first tooth is configured to engage with an outer link plate of a chain. The second tooth is configured to engage with an inner link plate of the chain. The at least one shifting area includes an area where a chain engages with one of the teeth during shifting from a small sprocket to the bicycle sprocket and an area where the chain separates from one of the teeth during a shifting action from the bicycle sprocket to the small sprocket. 1. A bicycle sprocket for engaging with a chain and having a rotational center axis , the bicycle sprocket comprising:a sprocket main body;a plurality of teeth disposed along a circumferential direction on a radially outer side of the sprocket main body; andat least one shifting area including an area where the chain engages with one of the plurality of teeth of the bicycle sprocket during a shifting action from a small sprocket to the bicycle sprocket and an area where the chain separates from one of the plurality of teeth of the bicycle sprocket during a shifting action from the bicycle sprocket to the small sprocket,the plurality of teeth including at least one first tooth having a first maximum axial width for engaging with an outer link plate of the chain and at least one second tooth having a second maximum axial width for engaging with an inner link plate of the chain, the first maximum axial width being larger than the second maximum axial width.2. The bicycle sprocket according to claim 1 , whereinthe plurality of teeth include a plurality of the first teeth.3. The bicycle sprocket according to claim 1 , whereinthe plurality of teeth include a plurality of the second ...

LOW-NOISE SPROCKET

A chain may be engageable with a chainwheel assembly that includes a plurality of chainwheels having different tooth counts. The chain includes a plurality of inner links having inner link plates, a plurality of outer links having outer link plates, and a plurality of pins joining the outer and inner links in alternating sequence. The chain also may include the inner link plate having a chamfer disposed on a surface of a link plate, the chamfer disposed on a central region of an inner link extending between two points, the chamfer having a contour between the two points that is discontinuous at a central region of the inner link plate. The chain also may include a second chamfer and the first chamfer forming a ridge of constant thickness therebetween. 1. A chain engageable with a chainwheel assembly including a plurality of chainwheels having different tooth counts , the chain comprising:a plurality of inner links having inner link plates;a plurality of outer links having outer link plates; anda plurality of pins joining the outer and inner links in alternating sequence,the inner link plate having a chamfer disposed on a surface of a link plate, the chamfer disposed on a central region of an inner link extending between two points, the chamfer having a contour between the two points that is discontinuous at a central region of the inner link plate.2. The chain of claim 1 , wherein the central region comprises a constant depth region of the chamfer.2. The chain of claim 1 , wherein the inner link plate has a second chamber disposed on the surface of the link plate claim 1 , the second chamfer and the first chamfer forming a ridge of constant thickness therebetween.3. The chain of claim 1 , wherein the chamfer includes claim 1 , in the central region of the inner link plate claim 1 , an approximately straight line chamfer profile of the transition line that is defined by the chamfer surface and the remaining unchamfered outer side surface of the inner link plate.4. ...

MULTIPLE-SPROCKET ARRANGEMENT FOR A BICYCLE GEARING

A multiple-sprocket arrangement for mounting on a rear wheel axle of a bicycle includes a receiving body designed for mounting on the rear wheel axle, and a sprocket assembly. The sprocket assembly includes a first sprocket, the inner diameter of which is greater than an outer diameter of the receiving body and which is connected to the receiving body. The sprocket assembly further includes at least one second sprocket, the inner diameter of which is smaller than an outer diameter of the receiving body and which is designed in an unsupported manner and connected to the receiving body in a torque-transmitting manner by means of the first sprocket. The first sprocket and the at least one second sprocket may be of a one-piece construction. 1. A multiple-sprocket arrangement for mounting on a rear wheel axle of a bicycle , comprising:a receiving body shaped and sized to mount on the rear wheel axle, anda sprocket assembly including a first sprocket connected to the receiving body, the first sprocket having an inner diameter greater than an outer diameter of the receiving body, and at least one second sprocket having an inner diameter smaller than the outer diameter of the receiving body and which is indirectly supported on the receiving body by a connection with the first sprocket, the first sprocket and the at least one second sprocket being a one-piece construction.2. A multiple-sprocket arrangement according to claim 1 , wherein the first sprocket and the at least one second sprocket are connected to one another by a first flange section extending substantially parallel to the rear wheel axle.3. A multiple-sprocket arrangement according to claim 1 , wherein the sprocket assembly includes two second sprockets.4. A multiple-sprocket arrangement according to claim 3 , wherein the two second sprockets are connected to one another by a second flange section extending parallel to the rear wheel axle or separate fasteners.5. A multiple-sprocket arrangement according to ...

BICYCLE SPROCKET

A bicycle sprocket comprises a sprocket body, a shifting facilitation area, and a plurality of chain-driving teeth. The plurality of chain-driving teeth comprises a reference tooth and a first tooth. The reference tooth has a reference radial length defined radially outward from a root circle of the bicycle sprocket. The first tooth has a first radial length defined radially outward from the root circle of the bicycle sprocket. The first radial length is larger than the reference radial length. The first tooth is adjacent to the reference tooth in a circumferential direction defined about the rotational center axis without another tooth between the first tooth and the reference tooth. The first tooth is provided on a downstream side of the reference tooth in a driving rotational direction in which the bicycle sprocket is rotated about the rotational center axis during pedaling. 1. A bicycle sprocket comprising:a sprocket body including a radially outer periphery provided about a rotational center axis of the bicycle sprocket;a shifting facilitation area to facilitate a shifting operation of the bicycle chain, the shifting facilitation area having a shifting facilitation recess; and a reference tooth provided in the shifting facilitation area, the reference tooth having a reference radial length defined radially outward from a root circle of the bicycle sprocket; and', 'a first tooth provided in the shifting facilitation area, the first tooth having a first radial length defined radially outward from the root circle of the bicycle sprocket, the first radial length being larger than the reference radial length, the first tooth being adjacent to the reference tooth in a circumferential direction defined about the rotational center axis without another tooth between the first tooth and the reference tooth, the first tooth being provided on a downstream side of the reference tooth in a driving rotational direction in which the bicycle sprocket is rotated about the ...

BICYCLE SPROCKET ASSEMBLY

A bicycle sprocket assembly comprises a first sprocket and a second sprocket. The first sprocket comprises a first sprocket body, a first shifting facilitation area, a plurality of first chain-driving teeth, and a first outer diameter. The second sprocket comprises a second sprocket body, a plurality of second chain-driving teeth, a second outer diameter, and a support protuberance. The support protuberance protrudes from the second sprocket body toward the first sprocket. The support protuberance is provided in a circumferential support area on the second sprocket. The circumferential support area is configured to face a circumferential area on the first sprocket in an axial direction. The circumferential area extends from a third tooth to a fifth tooth in a circumferential direction with respect to a rotational center axis. 1. A bicycle sprocket assembly comprising: a first sprocket body including a first radially outer periphery provided about a rotational center axis of the bicycle sprocket assembly;', 'a first shifting facilitation area to facilitate a shifting operation of a bicycle chain;', 'a plurality of first chain-driving teeth provided on the first radially outer periphery to engage with the bicycle chain, the plurality of first chain-driving teeth including a first tooth, a second tooth, a third tooth, a fourth tooth, and a fifth tooth which are circumferentially arranged in order and which are adjacent to each other without another tooth therebetween, the first tooth being provided in the first shifting facilitation area and provided on an upstream side of the fifth tooth in a driving rotational direction in which the bicycle sprocket assembly is rotated about the rotational center axis during pedaling; and', 'a first outer diameter defined by the plurality of first chain-driving teeth; and, 'a first sprocket comprising a second sprocket body including a second radially outer periphery provided about the rotational center axis of the bicycle sprocket ...

CLAD CHAINRING

A bicycle chainring, including a generally annular body formed of at least an inner material, the inner material including a first side and a second side opposite the first side and a plurality of teeth disposed about a periphery of the body. At least some of the plurality of teeth are formed of both the inner material and an outer material, the outer material disposed on one or both of the first and second sides, the outer material having a greater wear resistance relative to the inner material and a thickness greater than 0.1 millimeter. 1. A sprocket for a bicycle drivetrain , comprising:a generally annular body formed of at least an inner material, the inner material including a first side and a second side opposite the first side; anda plurality of teeth disposed about a periphery of the body, at least some of the plurality of teeth formed of both the inner material and an outer material, the outer material disposed on both of the first and second sides, the outer material having a greater wear resistance relative to the inner material and a thickness greater than 0.1 millimeter, wherein the outer material of the first side and the second side comes into contact at the tip of at least one tooth.2. The sprocket of claim 1 , wherein the inner material includes an aluminum alloy and the outer material includes an iron alloy.3. The sprocket of claim 1 , wherein the plurality of teeth include a first group of teeth and a second group of teeth claim 1 , each of the teeth of the first group of teeth wider than each of the teeth of the second group of teeth.4. The sprocket of claim 3 , wherein each of the first group of teeth is arranged between an adjacent pair of the second group of teeth.5. The sprocket of claim 3 , wherein each of the first group of teeth is arranged between each of the second group of teeth in an alternating pattern.6. The sprocket of claim 3 , wherein the plurality of teeth is an even number of teeth.7. The sprocket of claim 6 , wherein the first ...

SPROCKET WHEEL FOR A BICYCLE DRIVE

An individual chain wheel for a bicycle front crank arrangement for engaging in a drive chain includes a plurality of teeth formed on a circumference of the chain wheel and having a first and a second group of teeth. The teeth of the second group of teeth are arranged in an alternating manner between the teeth of the first group of teeth. Each tooth has a load flank via which force is transmitted between an adjacent roller of the drive chain and the respective tooth. Each tooth of the first group may also have at least one profile with an opening in the vicinity of the flank, in which a portion of an inner link plate of the drive chain, which portion protrudes beyond the roller, engages. 1. A single chain wheel for a bicycle front crank arrangement for engaging in a roller drive chain , comprising:a plurality of teeth formed on a circumference of the chain wheel and having a first and a second group of teeth, wherein the teeth of the second group of teeth are arranged in an alternating manner between the teeth of the first group of teeth, the teeth of the first group of teeth comprise a portion of greater material thickness than the teeth of the second group of teeth in a direction transverse with respect to a circumferential direction of said chain wheel,wherein each tooth has a load flank, via which force is transmitted between an adjacent chain roller of the drive chain and the respective tooth, andwherein the teeth of the second group of teeth in the radial direction of the individual chain wheel are formed with a lower height than the teeth of the first group of teeth, wherein the teeth of the second group of teeth have a height in the range from about 85% up to 90% of the height of the teeth of the first group of teeth.2. The single chain wheel according to claim 1 , wherein each tooth of the first group of teeth and/or each tooth of the second group of teeth is provided with a tapered tooth crest.3. The single chain wheel according to claim 1 , wherein the ...

BICYCLE SPROCKET ASSEMBLY

A bicycle rear sprocket assembly comprises a sprocket carrier , at least one metallic support , and at least one rear sprocket -. The sprocket carrier is made of a non-metallic material. The at least one metallic support is attached to at least one of a first circumferentially facing surface and a second circumferentially facing surface of at least one mounting arm of the sprocket carrier . The at least one rear sprocket -is made of a metallic material. A sprocket body of the at least one rear sprocket -is attached to the at least one metallic support 1. A bicycle sprocket assembly comprising:a sprocket carrier made of a non-metallic material, the sprocket carrier including a central base and at least one mounting arm extending radially outwardly from the central base with respect to a rotational center axis of the bicycle sprocket assembly, the at least one mounting arm having a first circumferentially facing surface and a second circumferentially facing surface opposite to the first circumferentially facing surface in a circumferential direction with respect to the rotational center axis;at least one metallic support attached to at least one of the first circumferentially facing surface and the second circumferentially facing surface of the at least one mounting arm; andat least one sprocket made of a metallic material, the at least one sprocket including a sprocket body and a plurality of sprocket teeth extending radially outwardly from the sprocket body with respect to the rotational center axis, the sprocket body being attached to the at least one metallic support.2. The bicycle sprocket assembly according to claim 1 , whereinthe first circumferentially facing surface of the at least one mounting arm faces a reverse direction of a rotational driving direction of the sprocket assembly;the at least one metallic support is attached to the first circumferentially facing surface of the at least one mounting arm.3. The bicycle sprocket assembly according to claim 2 , ...

BICYCLE FRONT SPROCKET ASSEMBLY

A bicycle front sprocket assembly is basically provided with a first sprocket, a second sprocket, a sprocket carrier and a chain guiding portion. The first sprocket includes a first sprocket body and a plurality of first sprocket teeth disposed on a first outer periphery of the first sprocket body, The second sprocket includes a second sprocket body and a plurality of second sprocket teeth. The second sprocket teeth are disposed on a second outer periphery of the second sprocket body. The sprocket carrier includes a torque transmitting profile and a sprocket mounting portion. The chain guiding portion is positioned between the first and second sprockets in an axial direction parallel to a rotational center axis of the bicycle front sprocket assembly. At least one of the first and second sprockets is mounted to the sprocket mounting portion of the sprocket carrier by a non-threaded fastener. 1. A bicycle front sprocket assembly comprising:a first sprocket including a first sprocket body and a plurality of first sprocket teeth disposed on a first outer periphery of the first sprocket body;a second sprocket including a second sprocket body and a plurality of second sprocket teeth disposed on a second outer periphery of the second sprocket body;a sprocket carrier including a torque transmitting profile and a sprocket mounting portion; anda chain guiding portion positioned between the first sprocket teeth and the second sprocket teeth in an axial direction parallel to a rotational center axis of the bicycle front sprocket assembly,at least one of the first sprocket and the second sprocket being mounted to the sprocket mounting portion of the sprocket carrier by a non-threaded fastener.2. A bicycle front sprocket assembly comprising:a first sprocket including a first sprocket body and a plurality of first sprocket teeth disposed on a first outer periphery of the first sprocket body, each of the first sprocket teeth having a first axial tooth center plane;a second sprocket ...

CHAIN WHEEL ASSEMBLY AND CHAIN WHEEL DEVICE USING IT

The present invention provides a chain wheel assembly and chain wheel device using it, wherein the chain wheel device includes a driver, a switching sleeve, plural chain wheels with different diameter sizes, plural connectors, and a fastener. Therein, the driver is connected to a wheel hub of a back wheel of a bicycle for transmitting a torque. One end of the switching sleeve is screwed to the driver. The chain wheels, axially stacked from the largest one to the smallest one, are disposed in a direction from the driver toward the switching sleeve, with sprockets disposed on the periphery of each chain wheel, respectively, for optionally engaging chain. The ring-shaped connectors are coupled between each two of the chain wheels, respectively. The fastener is screwed to the other end of the switching sleeve for axially fixing the switching sleeve. 1. A chain wheel assembly installed on an installation assembly disposed on a wheel hub of a back wheel of a bicycle , whereby the chain wheel assembly engages a chain , wherein the chain wheel assembly comprises:plural chain wheels with different diameter sizes, axially stacked from the largest one to the smallest one and disposed on the installation assembly, with plural sprockets disposed on the periphery of each of the chain wheels for optionally engaging the chain; andplural connectors, formed in a ring shape and coupled between each two of the chain wheels, respectively.2. The chain wheel assembly of claim 1 , wherein each of the connectors is made of a metal strip coiled up.3. The chain wheel assembly of claim 1 , wherein the connectors are arranged from the largest ring to the smallest ring and disposed between two of the neighboring chain wheels claim 1 , respectively.4. The chain wheel assembly of claim 1 , wherein each of the chain wheels is provided with plural coupling bores claim 1 , while two sides of each of the connectors are engaged with the coupling bores claim 1 , respectively.5. The chain wheel assembly ...

BICYCLE REAR SPROCKET ASSEMBLY

A bicycle rear sprocket assembly comprises a plurality of sprockets and a sprocket carrier. The sprocket carrier includes at least ten internal spline teeth and a circumferentially extending non-splined portion. The at least ten internal spline teeth extend in an axial direction with respect to a rotational center axis of the bicycle rear sprocket assembly. The at least ten internal spline teeth includes a plurality of internal-spline driving surfaces. The plurality of internal-spline driving surfaces each includes a radially outermost edge, a radially innermost edge, and a radial length. The total of the radial lengths ranges from 11 mm to 14 mm. The circumferentially extending non-splined portion is disposed to be adjacent to the at least ten internal spline teeth in the axial direction and recessed from the at least ten internal spline teeth in a radial direction with respect to the rotational center axis. 1. A bicycle rear sprocket assembly configured to be mounted to a sprocket support body of a bicycle rear hub assembly , the bicycle rear sprocket assembly comprising:a plurality of sprockets; and [ a radially outermost edge,', 'a radially inneimost edge, and', 'a radial length defined from the radially outermost edge to the radially innermost edge, the total of the radial lengths ranges from 11 mm to 14 mm; and, 'at least ten internal spline teeth configured to engage with the sprocket support body of the bicycle rear hub assembly, the at least ten internal spline teeth extending in an axial direction with respect to a rotational center axis of the bicycle rear sprocket assembly, the at least ten internal spline teeth including a plurality of internal-spline driving surfaces to transmit a driving rotational force during pedaling, the plurality of internal-spline driving surfaces each including'}, 'a circumferentially extending non-splined portion disposed to be adjacent to the at least ten internal spline teeth in the axial direction and recessed from the at ...

Assembly of bicycle frame, cassette, and wheel

The present invention is an assembly of bicycle frame, cassette, and wheel that improves the efficiency and performance of bicycle riding by placing the cassette on the frame and outside of the area between the left and right chain stays. 1. (canceled)3. The drive assembly of further including:a derailleur mounted to said frame forward of said cassette. The present invention is directed towards a bicycle that provides a high-quality riding experience. The assembly of bicycle frame, cassette, and wheel is an area that can still be improved in order to provide the user a better ride.The present invention is an assembly of bicycle frame, cassette, and wheel that improves the efficiency and performance of bicycle riding by placing the cassette on the frame and outside of the area between the left and right chain stays.In traditional bicycle manufacturing, the cassette is placed on the wheel hub and located between the left and right chain stays. When the wheel is removed from the frame, it is removed along with the cassette. Furthermore, removing the wheel is a tedious procedure because the chain must be removed from the cassette which is placed on the wheel.In the present invention, these issues are addressed by placing the cassette on the frame so that it resides outside of the area between the left and right chain stays. This creates a more-efficient transmission of energy from the rider's legs to the spinning of the wheel.Referring to the drawing, the cassette is placed on the frame and located outside of the area between the left and right chain stays . The wheel resides between the left and right chain stays and turns in reaction to the cassette by means of an axle . The chain runs through the rear derailleur and then over the cassette .

TOOTHED WHEEL ASSEMBLY FOR A CASSETTE

The invention relates to a toothed wheel assembly for a cassette having a first toothed wheel and a second toothed wheel that are concentric. The second tooth wheel has a greater number of teeth than the first toothed wheel; a radially inner cylindrical portion to engage a sprocket support body; a plurality of spokes comprising respective first constraining portions to the first toothed wheel and second constraining portions to the radially inner cylindrical portion; and a plurality of connection bodies that connect the first. The second toothed wheel has an axially-extending portion with at least one pair of spokes having connection bodies that include axially-extending portions in the circumferential direction and at least partially contained in the minimum circumferential extension a respective spoke.

BICYCLE REAR SPROCKET ASSEMBLY

A bicycle rear sprocket assembly comprises a plurality of bicycle sprockets comprising a first sprocket and a second sprocket. The first sprocket includes a first opening having a first minimum diameter that is smaller than a minimum outer diameter of a sprocket support body of a bicycle rear hub assembly. The second sprocket includes a second opening and at least ten internal spline teeth. The second opening has a second minimum diameter that is equal to or larger than the minimum outer diameter. The at least ten internal spline teeth are configured to engage with the sprocket support body of the bicycle rear hub assembly. The at least ten internal spline teeth include a plurality of internal-spline driving surfaces each including a radial length. A total of the radial lengths of the plurality of internal-spline driving surfaces is equal to or larger than 7 mm. 1. A bicycle rear sprocket assembly configured to be mounted to a sprocket support body of a bicycle rear hub assembly , the bicycle rear sprocket assembly comprising: [ 'a first opening having a first minimum diameter that is smaller than a minimum outer diameter of the sprocket support body of the bicycle rear hub assembly; and', 'a first sprocket including, a second opening having a second minimum diameter that is equal to or larger than the minimum outer diameter of the sprocket support body of the bicycle rear hub assembly; and', 'at least ten internal spline teeth configured to engage with the sprocket support body of the bicycle rear hub assembly, the at least ten internal spline teeth including a plurality of internal-spline driving surfaces to transmit a driving rotational force between the sprocket support body of the bicycle rear hub assembly and the bicycle rear sprocket assembly,, 'a second sprocket including], 'a plurality of bicycle sprockets comprising a radially outermost edge,', 'a radially innermost edge, and', 'a radial length defined from the radially outermost edge to the radially ...

BICYCLE REAR SPROCKET ASSEMBLY AND BICYCLE DRIVE TRAIN

A bicycle rear sprocket assembly is configured to be mounted to a sprocket support body of a bicycle rear hub assembly. The bicycle rear sprocket assembly comprises a plurality of bicycle sprockets. The plurality of bicycle sprockets comprises a first sprocket and a second sprocket. The first sprocket includes a first opening having a first minimum diameter that is smaller than a minimum outer diameter of the sprocket support body of the bicycle rear hub assembly. The second sprocket includes a second opening and at least ten internal spline teeth. The second opening has a second minimum diameter that is equal to or larger than the minimum outer diameter of the sprocket support body of the bicycle rear hub assembly. The at least ten internal spline teeth are configured to engage with the sprocket support body of the bicycle rear hub assembly. 1. A bicycle rear sprocket assembly configured to be mounted to a sprocket support body of a bicycle rear hub assembly , the bicycle rear sprocket assembly comprising: [ 'a first opening having a first minimum diameter that is smaller than a minimum outer diameter of the sprocket support body of the bicycle rear hub assembly; and', 'a first sprocket including, a second opening having a second minimum diameter that is equal to or larger than the minimum outer diameter of the sprocket support body of the bicycle rear hub assembly; and', 'at least ten internal spline teeth configured to engage with the sprocket support body of the bicycle rear hub assembly., 'a second sprocket including], 'a plurality of bicycle sprockets comprising2. The bicycle rear sprocket assembly according to claim 1 , further comprising [ a first axial end; and', 'a second axial end opposite to the first axial end in an axial direction with respect to a rotational center axis of the bicycle rear sprocket assembly, the first axial end being positioned closer to an axial center plane of the bicycle rear hub assembly than the second axial end in the state ...

BICYCLE SPROCKET ASSEMBLY COMPONENT AND BICYCLE MOTION TRANSMISSION SYSTEM

A sprocket assembly component with at least one first toothed wheel configured to have the most teeth of the sprocket assembly. The first toothed wheel has an axially inner surface and a supporting assembly that extends in the axial direction up to a free end arranged axially more internally with respect to the axially inner surface of the first toothed wheel. 1. A sprocket assembly component comprising:at least one first toothed wheel configured to be the toothed wheel having the most teeth of a sprocket assembly, said first toothed wheel comprising an axially inner surface;a supporting assembly that extends in an axial direction up to a free end arranged axially more internally with respect to the axially inner surface of the first toothed wheel.2. The sprocket assembly component according to claim 1 , wherein the teeth of the first toothed wheel are separated from one another by respective troughs; said supporting assembly being radially inner with respect to a radially innermost point of said troughs.3. The sprocket assembly component according to claim 1 , wherein said supporting assembly comprises a radially outer surface substantially perpendicular to the axially inner surface of the first toothed wheel; said radially outer surface extending up to said free end.4. The sprocket assembly component according to claim 1 , wherein said supporting assembly comprises a substantially annular protuberance.5. The sprocket assembly component according to claim 4 , wherein said substantially annular protuberance is arranged on the axially inner surface of the first toothed wheel.6. The sprocket assembly component according to claim 1 , wherein said supporting assembly comprises a plurality of axial protuberances circumferentially spaced from one another.7. The sprocket assembly component according to claim 1 , comprising a second toothed wheel having a smaller number of teeth than the number of teeth of the first toothed wheel claim 1 , preferably a third toothed wheel ...

Sprocket Assembly

The invention relates to a sprocket assembly for mounting on a driver of a rear wheel hub of a bicycle. By means of a threaded element, a sprocket cluster and a separately embodied ring element are axially clamped together, and a rotation-coupling device is provided between the sprocket cluster and the ring element. Knurled teeth features on the threaded element and ring element prevent the loosening of the threaded element. Through the separate embodiment of the ring element and sprocket cluster, the respective most suitable manufacturing methods can be used for the two parts and, in the event that the sprocket cluster is manufactured by means of machining methods, the knurled features on the ring element can also be produced in a cost-effective and precise manner through shaping methods.

BICYCLE REAR SPROCKET ASSEMBLY

A bicycle rear sprocket assembly is basically provided that includes a first sprocket including a first sprocket body and a plurality of first sprocket teeth provided to an outer periphery thereof. Each of a plurality of first circumferential areas has a first circumferential length. A first total number of the plurality of first circumferential areas is an even number. A first circumferential area counting number from a driving surface of a first shifting initiation tooth to a driving surface of a second shifting initiation tooth in a driving rotational direction of the bicycle rear sprocket assembly is an odd number. A second circumferential area counting number from the driving surface of the second shifting initiation tooth to the driving surface of the first shifting initiation tooth in the driving rotational direction is an odd number. The first circumferential area counting number is different from the second circumferential area counting number. 1. A bicycle rear sprocket assembly comprising: a first sprocket body;', 'a plurality of first sprocket teeth provided to an outer periphery of the first sprocket body, the plurality of first sprocket teeth including a first shifting initiation tooth and a second shifting initiation tooth, a plurality of first circumferential areas each of which has a first circumferential length corresponding to a single tooth pitch defined from a driving surface of a tooth of the first sprocket teeth to a driving surface of an adjacent tooth of the first sprocket teeth, the adjacent tooth being adjacent to the tooth without another tooth of the first sprocket teeth therebetween,', 'a first total number of the plurality of first circumferential areas is an even number;', 'a first shifting facilitation area in which the first shifting initiation tooth is disposed; and', 'a second shifting facilitation area in which the second shifting initiation tooth is disposed;', 'a first circumferential area counting number from a driving surface ...

BICYCLE SPROCKET AND BICYCLE SPROCKET ASSEMBLY

A bicycle sprocket has a rotational center axis, and basically includes a first tooth and a second tooth. The first tooth has a first axial chain engaging width. A first axial chain engaging width is smaller than a first axial spacing of the outer link. Further, the first axial chain engaging width is larger than a second axial spacing of an inner link coupled to an outer link. The second tooth has a second axial chain engaging width. The second axial chain engaging width is smaller than the second axial spacing. The second tooth is formed by deformation of the material. 1. A bicycle sprocket having a rotational center axis , the bicycle sprocket comprising:a first tooth having a first axial chain engaging width that is smaller than a first axial spacing of an outer link and larger than a second axial spacing of an inner link coupled to the outer link, anda second tooth having a second axial chain engaging width that is smaller than the second axial spacing, the second tooth being formed by deformation of a material constituting the second tooth.2. The bicycle sprocket according to claim 1 , whereinthe second tooth is formed by press working.3. The bicycle sprocket according to claim 1 , whereinthe first tooth includes a recess configured to minimize interference with the inner link, andthe recess is formed by press working.4. The bicycle sprocket according to claim 1 , whereinthe first tooth includes a recess configured to minimize interference with the inner link, andthe recess is formed by a cutting process.5. The bicycle sprocket according to claim 1 , whereinthe first tooth comprises a main body portion and an additional portion, the additional portion is attached to the main body portion to increase a width of the main body portion, andthe first axial chain engaging width is obtained by attaching the additional portion to the main body portion.6. The bicycle sprocket according to claim 5 , whereinthe additional portion is made of metal and attached to the main ...

MULTI-SPROCKET FOR BICYCLES

A multi-sprocket assembly for attachment to a rear axle assembly of a bicycle comprises at least one first sprocket, at least one second sprocket, and at least one damping member. The at least one first sprocket has a toothed ring, a coupling opening and a connecting portion connecting the toothed ring to the coupling opening. The at least one damping member extends from the at least one first sprocket toward the at least one second sprocket. The at least one damping member is disposed at least on an axial side surface of the connecting portion of the at least one first sprocket. 1. A multi-sprocket assembly for attachment to a rear axle assembly of a bicycle , comprising:at least one first sprocket having a toothed ring, a coupling opening and a connecting portion connecting the toothed ring to the coupling opening;at least one second sprocket; andat least one damping member, the at least one damping member extending from the at least one first sprocket toward the at least one second sprocket, wherein the at least one damping member is disposed at least on an axial side surface of the connecting portion of the at least one first sprocket.2. A multi-sprocket assembly according to claim 1 , wherein the at least one damping member is supported at least on mutually facing axial side surfaces of the first sprocket and of the second sprocket.3. A multi-sprocket assembly according to claim 1 , wherein the at least one damping member contacts the at least one second sprocket at least in the radial direction.4. A multi-sprocket assembly according to claim 1 , wherein at least the first sprocket is configured for coupling the multi-sprocket assembly in a torque-transmitting manner to the rear axle assembly of the bicycle.5. A multi-sprocket assembly according to claim 1 , wherein the at least one damping member is held between the at least one first sprocket and the at least one second sprocket via a press fit.6. A multi-sprocket assembly according to claim 1 , wherein the ...

BICYCLE SPROCKET

A bicycle sprocket for a sprocket cassette comprises a sprocket main body which extends about a virtual sprocket axis about which the sprocket is rotatable during intended operation on a bicycle. In the case of a single release tooth being formed, a release-side stabilizing tooth is arranged in the circumferential region of extent of an upshift recess formation. The release-side stabilizing tooth has an inner tooth contact surface which has a greater axial spacing to an axial reference position than an inner tooth contact surface of the reference tooth. Additionally, or alternatively, in the case of a single catch tooth being formed, a receiving-side stabilizing tooth is arranged in the circumferential region of extent of a downshift recess formation. The receiving-side stabilizing tooth has an inner tooth contact surface which has a greater axial spacing to the axial reference position than the inner tooth contact surface of the reference tooth. 1. A bicycle sprocket for a sprocket cassette , the bicycle sprocket comprising:a sprocket main body extending about a virtual sprocket axis about which the sprocket is rotatable during intended operation on a bicycle, the sprocket axis defining an axial direction, radial directions orthogonal with respect thereto, and a circumferential direction encircling the axial direction; anda plurality of sprocket teeth for engaging with a bicycle roller chain having inner link plate chain links and outer link plate chain links alternating along a circulating path of the bicycle roller chain, the plurality of sprocket teeth spaced apart from one another and arranged in the circumferential direction,wherein the sprocket is designed to be arranged on a bicycle such that an axially outwardly facing outer side surface of the sprocket rotates clockwise as seen in an axial plan view of the outer side surface during forward travel, driven by the sprocket, of the bicycle, and such that an axially inwardly facing inner side surface, which is ...

BICYCLE COGSET

A bicycle cogset comprises a sprocket base, a first sprocket, and a second sprocket. A periphery of the sprocket base is provided with a plurality of connecting arms, and each of the connecting arms is provided with at least one first and one second connection hole respectively. The first sprocket has a first outer portion and a first inner portion, the first outer portion provided with a plurality of first teeth, the first inner portion provided with a plurality of first insertion members, and the first insertion members disposed in the first connection holes. The second sprocket has a second outer portion and a second inner portion, the second outer portion provided with a plurality of second teeth, the second inner portion provided with a plurality of second insertion members, and the second insertion members disposed in the second connection holes. 1. A bicycle cogset , which is combined with a sleeve of a rear hub of a bicycle , comprising:a sprocket base, having a combination hole used for combining with the sleeve , wherein a periphery of the sprocket base is provided with a plurality of connecting arms, and each of the connecting arms is provided with at least one first connection hole and at least one second connection hole;a first sprocket, having a first outer portion and a first inner portion, wherein the first outer portion is provided with a plurality of first teeth, the first inner portion is provided with a plurality of first insertion members, and the first insertion members are disposed in the first connection holes; anda second sprocket, having a second outer portion and a second inner portion, wherein the second outer portion is provided with a plurality of second teeth, the second inner portion is provided with a plurality of second insertion members, and the second insertion member are disposed in the second connection holes.2. The bicycle cogset according to claim 1 , further comprising a plurality of columnar connecting elements claim 1 , the ...

BICYCLE DRIVE UNIT

A bicycle drive unit includes a housing, crankshaft and a propulsion assist motor. The housing is configured to be mounted on a frame of a bicycle. The housing includes a first portion and a second portion. The crankshaft is provided to the first portion of the housing. The propulsion assist motor is provided to the second portion of the housing and configured to assist propulsion of the bicycle. The propulsion assist motor includes a rotational axis extending in a direction intersecting a direction in which the crankshaft extends. The second portion has a maximum dimension of smaller than or equal to 75 mm in a direction orthogonal to the rotational axis of the propulsion assist motor. 1. A bicycle drive unit comprising:a housing configured to be mounted on a frame of a bicycle, the housing including a first portion and a second portion;a crankshaft provided to the first portion of the housing; anda propulsion assist motor provided to the second portion of the housing and configured to assist propulsion of the bicycle,the propulsion assist motor including a rotational axis extending in a direction intersecting a direction in which the crankshaft extends,the second portion having a maximum dimension of smaller than or equal to 75 mm in a direction orthogonal to the rotational axis of the propulsion assist motor.2. The bicycle drive unit according to claim 1 , whereinthe housing is configured to be accommodated in at least a part of the frame.3. The bicycle drive unit according to claim 1 , whereinthe second portion has a minimum dimension of larger than or equal to 40 mm in a direction orthogonal to the rotational axis of the propulsion assist motor.4. The bicycle drive unit according to claim 3 , whereinthe second portion has a first dimension in a first direction differs from a second dimension in a second direction extending perpendicular to the first direction on a plane orthogonal to the rotational axis of the propulsion assist motor.5. The bicycle drive unit ...

BICYCLE DRIVE UNIT

A bicycle drive unit includes a housing, a crankshaft and a propulsion assist motor. The housing is configured to be mounted on a frame of a bicycle. The crankshaft is provided to the housing. The assist propulsion motor is provided to the housing to assist propulsion of a bicycle. The propulsion assist motor includes a rotational axis extending in a direction intersecting a direction in which crankshaft extends. The bicycle drive unit is configured such that a distance from a rotational axis of the crankshaft to a part of the bicycle drive unit that is the farthest from the rotational axis of the crankshaft in a direction parallel to the rotational axis of the propulsion assist motor is smaller than or equal to 210 mm. 1. A bicycle drive unit comprising:a housing configured to be mounted on a frame of a bicycle;a crankshaft provided to the housing; anda propulsion assist motor provided to the housing and having a rotational axis extending in a direction intersecting a direction in which the crankshaft extends,the bicycle drive unit being configured such that a distance from a rotational axis of the crankshaft to a part of the bicycle drive unit that is the farthest from the rotational axis of the crankshaft in a direction parallel to the rotational axis of the propulsion assist motor is smaller than or equal to 210 mm.2. The bicycle drive unit according to claim 1 , whereinthe housing is configured to be accommodated in at least part of the frame.3. The bicycle drive unit according to claim 1 , whereinthe housing includes a first portion and a second portion,the crankshaft is provided to the first portion,the propulsion assist motor is provided to the second portion,the second portion of the housing includes a first end and a second end that are spaced in the direction parallel to the rotational axis of the assist propulsion motor,the first end of the second portion is connected to the first portion, andthe part of the bicycle drive unit that is the farthest from ...

BICYCLE DRIVE UNIT

A bicycle drive unit includes a housing, a crankshaft and a propulsion assist motor. The housing is configured to be coupled to a frame of a bicycle. The housing includes first and second portions. The crankshaft is provided to the first portion of the housing. The propulsion assist motor is provided to the second portion of the housing. The propulsion assist has a rotational axis extending in a direction intersecting with a direction in which the crankshaft extends. A maximum dimension of the first portion in the direction in which the crankshaft extends is less than or equal to 100 mm. A maximum output torque of the propulsion assist motor is greater than or equal to 10 Nm and less than or equal to 80 Nm. 1. A bicycle drive unit comprising:a housing configured to be coupled to a frame of a bicycle, the housing including a first portion and a second portion;a crankshaft provided to the first portion of the housing; anda propulsion assist motor provided to the second portion of the housing,the propulsion assist motor having a rotational axis extending in a direction intersecting with a direction in which the crankshaft extends,the first portion having a maximum dimension in the direction in which the crankshaft extends is less than or equal to 100 mm, andthe propulsion assist motor having a maximum output torque that is greater than or equal to 10 Nm and less than or equal to 80 Nm.2. The bicycle drive unit according to claim 1 , whereinthe housing is configured to be at least partially accommodated in the frame.3. The bicycle drive unit according to claim 1 , whereinthe maximum output torque of the propulsion assist motor is greater than or equal to 10 Nm and less than or equal to 60 Nm.4. The bicycle drive unit according to claim 3 , whereinthe maximum output torque of the propulsion assist motor is greater than or equal to 10 Nm and less than or equal to 40 Nm.5. The bicycle drive unit according to claim 1 , whereinthe second portion has a maximum dimension in a ...

CASSETTE AND BODY FOR MOUNTING A CASSETTE ON A BICYCLE REAR WHEEL HUB

A cassette adapted for mounting on a bicycle rear wheel hub and a by a mounting body for positioning the assembly on a bicycle rear wheel hub. The cassette has a plurality of adjacent sprockets fixedly connected to one another along an axis of the cassette. The cassette has an axial centering opening for centering on the mounting body without transmission of torque, and a plurality of attachment areas positioned a greater radial distance from the axis of the cassette than the radius of the centering opening for attachment to the mounting body. 1. A cassette adapted for mounting on a bicycle rear wheel hub by means of a body , comprising a plurality of sprockets fixedly connected to one another , adjacent along an axis (X) of the cassette , characterized in that it comprises an axial centering opening for centering on the body without transmission of torque , and a plurality of attachment areas to the body , positioned a greater radial distance from the axis (X) of the cassette than the radius of the centering opening.2. The cassette according to claim 1 , wherein each of the attachment areas to the body comprises a support surface for the body and at least one threaded hole at the support surface.3. The cassette according to claim 1 , wherein each of the attachment areas to the body comprises a support surface for the body and at least one threaded pin at the support surface.4. The cassette according to claim 1 , wherein the attachment areas to the body are mutually equally spaced apart in the circumferential direction claim 1 , around the axis (X) of the cassette.5. The cassette according to claim 1 , wherein the sprockets of the cassette are a single machined piece.6. The cassette according to claim 5 , wherein adjacent sprockets are connected by connections aligned solely with recesses of a smallest sprocket of the plurality of sprockets.7. The cassette according to claim 1 , wherein the centering opening comprises an axial support area claim 1 , intended for ...

BODY FOR BICYCLE REAR WHEEL HUB AND CASSETTE ADAPTED TO BE MOUNTED ON THE HUB BY MEANS OF SUCH A BODY

A mounting body and a cassette suitable for mounting on a bicycle rear wheel hub in combination with the body. The body has an inner radial portion for coupling with rear wheel hub and an outer radial portion for mounting the cassette and a portion with a plurality of attachment areas for attachment to a cassette. The cassette has an axial centering opening for centering on the mounting body and a plurality of cassette attachment areas that align with the mounting body attachment areas to unite the mounting body and cassette for transmission of pedaling torque. 1. A body for mounting a cassette on a bicycle rear wheel hub , comprising:a radially inner first portion, of tubular shape, with an axial cavity arranged along an axis (X) of the body and intended for coupling with the hub through a free-wheel system, and a radially outer surface for mounting the cassette, wherein the first portion has axial extension between a first face and a second face of the body, and has shorter axial extension than the axial extension of the first portion;', 'extends radially outwards from the first portion; and', 'has a plurality of attachment areas for attachment to the cassette., 'the second portion, 'a radially outer second portion for coupling with the cassette, wherein'}2. The body according to claim 1 , wherein the attachment areas each comprise a support surface for the cassette and at least one hole at the support surface claim 1 , the hole passing right through the axial thickness of the second portion of the body.3. The body according to claim 2 , wherein the support surfaces of the attachment areas are coplanar to one another and perpendicular to the axis (X) of the body.4. The body according to claim 2 , wherein the support surfaces of the attachment areas extend radially outwards as much as the second portion.5. The body according to claim 2 , wherein the holes of the attachment areas are divided into two series claim 2 , a first series of holes at a first radial ...

METHOD FOR MANUFACTURING BICYCLE COGSET

A bicycle cogset manufacturing method includes: connecting a first and a second sprocket in different sizes with connecting members as a sprockets assembly in advance, where first and second inner portions of the first and second sprockets respectively have first insertion and second insertion members, and each of the insertion members are respectively provided with a first and a second positioning hole; transferring the sprockets assembly into a mold, and performing pouring to form a sprocket base, where an assembly hole is disposed in the center of the sprocket base, a plurality of connecting arms are arranged on an outer portion of the sprocket base, and the connecting arms clad the first insertion members and the second insertion members to form a cogset. In this way, modularization can be implemented to achieve objectives of preventing troublesome riveting, accelerating manufacture, and reducing product weight. 1. A method for manufacturing a bicycle cogset , comprising the following steps:Step (a1): preparing a first sprocket, wherein the first sprocket has a first outer portion and a first inner portion, the first outer portion is provided with a plurality of first teeth, the first inner portion is provided with a plurality of first insertion members, and each of the first insertion members is provided with a first positioning hole;Step (b1): preparing a second sprocket, wherein the second sprocket has a second outer portion and a second inner portion, the second outer portion is provided with a plurality of second teeth, the second inner portion is provided with a plurality of second insertion members, and each of the second insertion members is provided with a second positioning hole;Step (c1): preparing a plurality of connecting members, wherein each of the connecting members has a first pin and a second pin that are formed at different ends, the first pin is disposed in the first positioning hole of the first sprocket, and the second pin is disposed in ...

CHAINRING

A bicycle chainring for engagement with a drive chain includes a plurality of teeth extending from a periphery of the chainring wherein roots of the plurality of teeth are disposed adjacent the periphery of the chainring. The plurality of teeth include a first group of teeth and a second group of teeth, each of the first group of teeth wider than each of the second group of teeth. At least some of the second group of teeth are arranged alternatingly and adjacently between the first group of teeth, and at least some of the first group of teeth are asymmetrically wider than each of the second group of teeth. 1. A bicycle chainring for engagement with a drive chain , comprising:a plurality of teeth extending from a periphery of the chainring wherein roots of the plurality of teeth are disposed adjacent the periphery of the chainring;the plurality of teeth including a first group of teeth and a second group of teeth, each of the first group of teeth wider than each of the second group of teeth;at least some of the second group of teeth arranged alternatingly and adjacently between the first group of teeth; andwherein at least some of the first group of teeth are asymmetrically wider than each of the second group of teeth.2. The bicycle chainring of claim 1 , wherein each of the plurality of teeth includes an outboard side and an inboard side opposite the outboard side and each of the first group of teeth includes at least a first protrusion on one of the outboard side and the inboard side and each of the second group of teeth are free of the first protrusion.3. The bicycle chainring of claim 2 , wherein each of the first group of teeth includes at least a second protrusion on the other of the outboard and inboard sides.4. The bicycle chainring of claim 3 , wherein the first protrusion has a first width and the second protrusion has a second width; andwherein the first and second protrusion widths are one of equal and unequal.5. The bicycle chainring of for engagement ...

BICYCLE SPROCKET AND BICYCLE SPROCKET ASSEMBLY

A bicycle sprocket having a rotational center axis, the bicycle sprocket comprises a sprocket body, a chain engagement structure, and a shifting facilitation projection. The chain engagement structure is arranged on a radially outer periphery of the sprocket body. The chain engagement structure includes a plurality of chain-driving teeth to engage with a bicycle chain to transmit a rotational driving force to the bicycle chain. The shifting facilitation projection is to facilitate an upshifting operation of the bicycle chain and to facilitate a downshifting operation of the bicycle chain. 1. A bicycle sprocket having a rotational center axis , the bicycle sprocket comprising:a sprocket body;a chain engagement structure arranged on a radially outer periphery of the sprocket body, the chain engagement structure including a plurality of chain-driving teeth to engage with a bicycle chain to transmit a rotational driving force to the bicycle chain; anda shifting facilitation projection to facilitate an upshifting operation of the bicycle chain and to facilitate a downshifting operation of the bicycle chain.2. The bicycle sprocket according to claim 1 , wherein at least one upshifting facilitation tooth, and', 'at least one downshifting facilitation tooth which is disposed on a downstream side of the at least one upshifting facilitation tooth., 'the plurality of chain-driving teeth includes'}3. The bicycle sprocket according to claim 2 , whereinthe at least one downshifting facilitation tooth is adjacent to the at least one upshifting facilitation tooth on a downstream side of the at least one upshifting facilitation tooth without another tooth between the at least one upshifting facilitation tooth and the at least one downshifting facilitation tooth.4. The bicycle sprocket according to claim 2 , whereinthe at least one downshifting facilitation tooth includes a downshifting derailing tooth to first derail the bicycle chain from the bicycle sprocket during the ...

Multiple Sprocket Assembly for a Bicycle

A roller chain based drive train for a bicycle includes a sprocket assembly configured for mounting to a hub of a rear wheel of the bicycle. The sprocket assembly includes a smaller sprocket, a larger sprocket, and a plurality of pins connecting the smaller sprocket and the larger sprocket to each other. The pins are mounted in outer pin mount holes on the smaller sprocket and in the inner pin mount holes on the larger sprocket. 1. A sprocket assembly for mounting to a hub of a rear wheel of the bicycle comprising:a first radial support and a second radial support, the first radial support being included in an end sprocket comprising an inner region and an outer region, the inner region comprising an opening having a torque transmitting profile, the second radial support formed as a part of at least one other sprocket of the sprocket assembly;a plurality of floating sprockets disposed between the end sprocket and the at least one other sprocket, the plurality of floating sprockets connected to the end sprocket and the at least one other sprocket by pins.2. The sprocket assembly of claim 1 , wherein the sprockets of the plurality of floating sprockets comprise a radially inner ring of pin mounts and a radially outer ring of pin mounts configured to receive the pins.3. The sprocket assembly of claim 2 , wherein the radially inner ring comprises a plurality of inner pin mounts claim 2 , and the radially inner ring has circumferential connectors extending between at least two adjacent inner pin mounts.4. The sprocket assembly of claim 3 , wherein the plurality of floating sprockets comprise a larger sprocket and a smaller sprocket.5. The sprocket assembly of claim 4 , wherein the larger sprocket comprises direct connections between the inner pin mounts of the inner ring and the outer ring.6. The sprocket assembly of claim 1 , wherein the end sprocket has a number of teeth greater than the other sprocket.7. The sprocket assembly of claim 1 , wherein the end sprocket has ...

BICYCLE CRANK ASSEMBLY AND BICYCLE SPROCKET ASSEMBLY

A bicycle crank assembly comprises a crank arm, a first sprocket, and a second sprocket. One of the first sprocket and the second sprocket comprises a first shifting facilitation area to facilitate a first shifting operation in which a bicycle chain is shifted from the second sprocket toward the first sprocket in a first chain-phase state in which a reference tooth of a plurality of second sprocket teeth is received in an outer link space, and a second shifting facilitation area to facilitate a second shifting operation in which the bicycle chain is shifted from the second sprocket toward the first sprocket in a second chain-phase state in which the reference tooth of the plurality of second sprocket teeth is received in an inner link space. 1. A bicycle crank assembly comprising:a crank arm; a first sprocket body including a first outer periphery; and', 'a plurality of first sprocket teeth provided on the first outer periphery, the plurality of first sprocket teeth including at least one first tooth provided on the first outer periphery to be received in only an outer link space defined between a pair of outer link plates of a bicycle chain; and, 'a first sprocket coupled to the crank arm to integrally rotate with the crank arm about a rotational center axis, the first sprocket comprising a second sprocket body including a second outer periphery; and', 'a plurality of second sprocket teeth provided on the second outer periphery, the plurality of second sprocket teeth including at least one second tooth provided on the second outer periphery to be engaged with the bicycle chain,, 'a second sprocket coupled to the crank arm to integrally rotate with the crank arm about the rotational center axis, the second sprocket comprising a first shifting facilitation area to facilitate a first shifting operation in which the bicycle chain is shifted from the second sprocket toward the first sprocket in a first chain-phase state in which a reference tooth of the plurality of ...

Speed-changing method of bicycle

A speed-changing method of bicycle suitable for controlling a gear ratio of a bicycle is provided. The bicycle has a front electronic derailleur, a rear electronic derailleur, a controller, and a controlling switch. The controller stores a gear-ratio table. The speed-changing method of bicycle includes the following steps. The controlling switch is triggered to generate a speed-increasing signal or a laborsaving signal. The controller controls the front and rear electronic derailleurs according to the speed-increasing signal or the laborsaving signal to increase the gear ratio along a speed-increasing path of the gear-ratio table or decrease the gear ratio along a laborsaving path of the gear-ratio table respectively. On the other hand, the front and rear electronic derailleurs are started simultaneously at a first switch point of the speed-increasing path or a second switch point of the laborsaving path, and the first switch point is different from the second switch point.

BICYCLE HUB ASSEMBLY

A bicycle hub assembly comprises a hub axle, a hub body, and a sprocket support structure. The hub axle includes an axle through-bore that has an axle minimum inner diameter equal to or larger than 13 mm. The hub body has a first body end and a second body end opposite to the first body end in an axial direction with respect to a rotational center axis. The sprocket support structure is rotatably mounted on the hub axle about the rotational center axis. The sprocket support structure includes a first torque-transmitting profile and a first externally-threaded portion. The first torque-transmitting profile is configured to transmit a rotational force. The first externally-threaded portion is configured to threadedly engage with a first internally-threaded portion of a first lock member. The first torque-transmitting profile is closer to the first body end than the first externally-threaded portion in the axial direction. 1. A bicycle hub assembly comprising:a hub axle including an axle through-bore that has an axle minimum inner diameter equal to or larger than 13 mm;a hub body rotatably supported on the hub axle about a rotational center axis of the bicycle hub assembly, the hub body having a first body end and a second body end opposite to the first body end in an axial direction with respect to the rotational center axis; and a first torque-transmitting profile configured to transmit a rotational force between the sprocket support structure and a bicycle sprocket assembly; and', 'a first externally-threaded portion configured to threadedly engage with a first internally-threaded portion of a first lock member, the first torque-transmitting profile being closer to the first body end than the first externally-threaded portion in the axial direction., 'a sprocket support structure rotatably mounted on the hub axle about the rotational center axis of the bicycle hub assembly, the sprocket support structure including2. The bicycle hub assembly according to claim 1 , ...

CASSETTE FOR A BICYCLE TRANSMISSION SYSTEM AND SPROCKET FOR A CASSETTE FOR A BICYCLE TRANSMISSION SYSTEM

Cassette () for a bicycle transmission system, which comprises a first sprocket (P) and a second sprocket (P) smaller than the first sprocket (P) and a support structure (S) the sprockets (P, P), being the inner edges (CI, CI) of the sprockets (P, P) configured by grooved surfaces (P, P), being the support structure (S) provided with two engagement surfaces (S, S) complementary of the grooved surfaces (P, P) of the grooved sprockets (P, P), such that tangential forces (T) can be transmitted between the sprockets and the support structure (S), comprising the cassette at least a spacer (E-, E-, E- . . . ) between sprockets (P, P), wherein the base line (B) of the second sprocket (P) is smaller than the average diameter (D) of the grooved surface (P) of the first sprocket (P), extending the spacer (E-) between the first sprocket (P) and the second sprocket (P) at least from the grooved surface (P) of the first sprocket (P) to at least the base line (B) of the second sprocket (P), such that the spacer (E-) allows to exert axial forces (A) on the first sprocket (P). 1. A cassette for a bicycle transmission system , comprising:at least a first sprocket provided with a plurality of teeth and a second sprocket provided with a smaller number of teeth than the first sprocket and mounted on an axis common to the first sprocket, in both sprockets a base line of the teeth being defined; anda support structure for supporting the sprockets,an outer edge configured by the teeth and an inner edge oriented towards the axis being defined in the sprockets, the inner edges of the sprockets being formed by grooved surfaces, the support structure being provided with two engagement surfaces complementary of the grooved surfaces of the grooved sprockets, such that tangential forces can be transmitted between the sprockets and the support structure, the cassette comprising at least a spacer between sprockets, characterised in that the diameter of the base line of the second sprocket is ...

BICYCLE FRONT SPROCKET, BICYCLE CRANK ASSEMBLY, AND BICYCLE DRIVE TRAIN

A bicycle front sprocket comprises a sprocket body and at least one sprocket tooth. The sprocket body includes a crank arm mounting portion including a first mounting axial surface facing toward an axial bicycle-center plane in an axial direction in a state where the bicycle front sprocket is mounted to the bicycle frame. The at least one sprocket tooth has a first chain-engagement axial surface facing toward the axial bicycle-center plane in the axial direction in a state where the bicycle front sprocket is mounted to the bicycle frame. The first chain-engagement axial surface is offset from the first mounting axial surface toward the axial bicycle-center plane in the axial direction. An axial distance is defined from the first mounting axial surface to the first chain-engagement axial surface in the axial direction and is equal to or larger than 6 mm. 1. A bicycle front sprocket comprising:a sprocket body including a crank arm mounting portion to be mounted to a bicycle crank arm, the crank arm mounting portion including a first mounting axial surface facing toward an axial bicycle-center plane in an axial direction parallel to a rotational center axis of the bicycle front sprocket in a state where the bicycle front sprocket is mounted to a bicycle frame, the axial bicycle-center plane being defined to bisect the bicycle frame in the axial direction; andat least one sprocket tooth having a first chain-engagement axial surface facing toward the axial bicycle-center plane in the axial direction in a state where the bicycle front sprocket is mounted to the bicycle frame, the first chain-engagement axial surface being offset from the first mounting axial surface toward the axial bicycle-center plane in the axial direction, an axial distance being defined from the first mounting axial surface to the first chain-engagement axial surface in the axial direction, the axial distance being equal to or larger than 6 mm, whereinan axially inner most portion of the first ...

Bicycle chain and motion transmission system comprising such a chain

A bicycle chain having an alternate succession of outer links and inner links connected to each other at respective end portions thereof. Each outer link and inner link comprises two respective plates arranged parallel to and spaced apart from one another to define a housing space for a tooth of a sprocket or toothed wheel. Each plate of each outer link has, at a central portion thereof, a first thickness. Each plate of each inner link has, at a central portion thereof, a second thickness. Each plate of each outer link and inner link has, at said respective end portions, a third thickness that is less than the sum of said first thickness and second thickness.

WHEEL HUB

A wheel hub () comprises a main body () and a drive axle arrangement () extending through the main body (). The main body () is rotatable about the drive axle arrangement (). The wheel hub () further includes a transmission assembly comprising first and second transmission arrangements (). The first transmission arrangement () is provided on the drive axle arrangement (), and the second transmission arrangement () is provided on the main body (). The first transmission arrangement () is cooperable with the second transmission arrangement () to transmit a driving force from the drive axle arrangement () to the main body (). The drive axle arrangement () comprises an axle portion () and a sprocket carrier (). The axle portion () extends through the main body (), and the sprocket carrier () is configured to carry at least one sprocket. 1. A wheel hub comprising:a main body;a drive axle arrangement extending through the main body, the main body being rotatable about the drive axle arrangement; anda transmission assembly comprising first and second transmission arrangements, the first transmission arrangement being provided on the drive axle arrangement, and the second transmission arrangement being provided on the main body;the first transmission arrangement being cooperable with the second transmission arrangement to transmit a driving force from the drive axle arrangement to the main body;wherein the drive axle arrangement comprises an axle portion and a sprocket carrier configured to carry at least one sprocket.2. A wheel hub according to wherein the axle portion extends through the main body claim 1 ,3. A wheel hub according to or claim 1 , further including a support arrangement for supporting the drive axle arrangement.4. A wheel hub according to claim 3 , wherein the support arrangement extends through the drive axle arrangement.5. A wheel hub according to or claim 3 , the support arrangement comprising first and second end support members at respective opposite ...

BICYCLE REAR SPROCKET ASSEMBLY

A bicycle rear sprocket assembly comprises a first sprocket and a second sprocket. The first sprocket includes a first torque-transmitting profile disposed around a first sprocket opening. The second sprocket includes a second torque-transmitting profile disposed around a second sprocket opening. The first torque-transmitting profile is configured to engage with the second torque-transmitting profile in the mounted state. The first sprocket includes an axial abutment surface configured to axially abut against the second sprocket for axially positioning the first sprocket and the second sprocket relative to each other in the mounted state. The axial abutment surface is disposed farther from an axial center plane of the bicycle rear hub assembly than the first torque-transmitting profile in the mounted state. 1. A bicycle rear sprocket assembly configured to be mounted to a sprocket support body of a bicycle rear hub assembly , the bicycle rear sprocket assembly comprising:a first sprocket having a first sprocket opening, a first hub-center facing side and a first hub-center far side provided on a reverse side of the first hub-center facing side in an axial direction with respect to a rotational center axis of the bicycle rear sprocket assembly, the first hub-center facing side being configured to face toward an axial center plane of the bicycle rear hub assembly in a mounted state where the bicycle rear sprocket assembly is mounted to the bicycle rear hub assembly, the first sprocket including a first torque-transmitting profile disposed around the first sprocket opening; anda second sprocket having a second sprocket opening, a second hub-center facing side and a second hub-center far side provided on a reverse side of the second hub-center facing side in the axial direction, the second hub-center facing side being configured to face toward the axial center plane of the bicycle rear hub assembly in the mounted state, the second sprocket including a second torque- ...

BICYCLE SPROCKET ARRANGEMENT

A bicycle sprocket arrangement comprises a largest sprocket, a smallest sprocket, and a plurality of intermediate sprockets. A first quotient is obtained if a total tooth-space number of the large sprocket is divided by a half of the tooth-space number difference. The first quotient is an even number with respect to all sprockets of the plurality of intermediate sprockets. A second quotient is obtained if the total tooth-space number of the small sprocket is divided by a half of the tooth-space number difference. The second quotient is an even number with respect to all sprockets of the plurality of intermediate sprockets excluding a largest intermediate sprocket of the plurality of intermediate sprockets. 1. A bicycle sprocket arrangement comprising:a largest sprocket having a largest total tooth-space number that is an odd number, the largest sprocket including an upshifting initiation tooth and an additional upshifting initiation tooth which are spaced apart from each other without another upshifting initiation tooth therebetween in a circumferential direction with respect to a rotational center axis of the bicycle sprocket arrangement, an even number of tooth-spaces being disposed between the upshifting initiation tooth and the additional upshifting initiation tooth in the circumferential direction;a smallest sprocket having a smallest total tooth-space number that is an even number;a plurality of intermediate sprockets disposed between the largest sprocket and the smallest sprocket in an axial direction with respect to a rotational center axis of the bicycle sprocket arrangement;a tooth-space number difference being defined as a difference between a total tooth-space number of a large sprocket among the plurality of intermediate sprockets and a total tooth-space number of a small sprocket among the plurality of intermediate sprockets and the smallest sprocket, the large sprocket and the small sprocket being adjacent to each other without another sprocket ...

BICYCLE CASSETTE WITH LOCKING CONNECTION

A bicycle cassette comprises two segments that are attached together thereby forming a composite cassette that can be attached to a rear bicycle hub driver body. The bicycle cassette allows for the use of a smaller sprocket on one segment of the cassette because the smaller sprockets can overhang the hub driver body. Specifically, the cassette allows a small 9 or 10 tooth sprocket to overhang the cassette driver body on the bicycle hub by attaching a small sprocket assembly to a larger sprocket assembly using a locking, bayonet style attachment. 124-. (canceled)25. A bicycle cassette comprising: i. one or more locking flanges;', 'ii. a torque receiving face;, 'a. a large sprocket assembly comprising i. one or more locking tangs;', 'ii. a torque driving face; and', 'iv. one or more locking holes,, 'b. a small sprocket assembly comprisingwherein after the large sprocket assembly is engaged on a bicycle hub, the small sprocket assembly is aligned with the large sprocket assembly such that the one or more locking tangs engage the one or more locking flanges, the torque driving face comes into contact with the torque receiving face and a screw is inserted into the one or more locking holes and tightened to lock the small sprocket assembly to the large sprocket assembly to form the bicycle cassette on the bicycle hub.26. The bicycle cassette of claim 25 , wherein the small sprocket assembly is coupled to the large sprocket assembly using a locking bayonet style attachment.27. The bicycle cassette of claim 25 , wherein the small sprocket assembly comprises a 9 tooth sprocket.28. The bicycle cassette of claim 25 , wherein the small sprocket assembly comprises a 10 tooth sprocket.29. The bicycle cassette of claim 25 , wherein the large sprocket assembly comprises a 42 tooth sprocket.30. The bicycle cassette of claim 25 , wherein the large sprocket assembly comprises a 44 tooth sprocket.31. The bicycle cassette of claim 25 , wherein the large sprocket assembly and the small ...

SEQUENTIAL ADJACENT DRIVE ASSEMBLY FOR A CYCLE

A sequential adjacent drive assembly for a single pivot rear suspension cycle includes a cycle frame and a suspension assembly operably attached to the cycle frame. The suspension assembly includes a wheel carrier and a wheel carrier fixed pivot. A primary drive assembly includes a primary drive sprocket having a primary drive sprocket rotation axis, a primary driven sprocket, and a primary drive chain operably connecting the primary drive sprocket and the primary driven sprocket. A secondary drive assembly is operably connected to the primary drive assembly. The secondary drive assembly includes a secondary drive sprocket having a secondary drive sprocket rotation axis, a secondary driven sprocket, and a secondary drive chain operably connecting the secondary drive sprocket and the secondary driven sprocket. A wheel is operably attached to the cycle frame and the secondary driven sprocket is operably connected to the wheel. 1. A sequential adjacent drive assembly for a cycle , the drive assembly comprising:a cycle frame;a suspension assembly operably attached to the frame, the suspension assembly comprising a wheel carrier and a wheel carrier fixed pivot;a primary drive assembly comprising a primary drive sprocket having a maximum circle diameter and a primary drive sprocket rotation axis, a primary driven sprocket, and a primary drive chain operably connecting the primary drive sprocket and the primary driven sprocket;a secondary drive assembly operably connected to the primary drive assembly, the secondary drive assembly comprising a secondary drive sprocket having a maximum circle diameter and a secondary drive sprocket rotation axis, a secondary driven sprocket, and a secondary drive chain operably connecting the secondary drive sprocket to the secondary driven sprocket; anda wheel operably attached to the cycle frame, the secondary driven sprocket being operably connected to the wheel;wherein the maximum circle diameter of the primary drive sprocket overlaps ...

Ratchet cylinder with strengthened structure for a bicycle

A ratchet cylinder with strengthened structure for a bicycle includes at least one anti-collision member which is disposed in the positioning grooves formed on an outer peripheral surface of the ratchet cylinder to press against the edge of the engaging ribs, and have rigidity higher than the engaging ribs. The anti-collision members will take the pushing force produced by the sprocket wheel, so as to prevent the engaging ribs from being damaged by the pushing force produced by the sprocket wheel. As a result, the structure strength of the ratchet cylinder and the engaging ribs are reinforced, and the maintenance cost can also be reduced.

MULTIPLE BICYCLE SPROCKET ASSEMBLY

A multiple bicycle sprocket assembly is basically provided that is capable of creating a gear ratio in a wide range. The multiple bicycle sprocket assembly includes a first sprocket and a second sprocket. The first sprocket includes a first tooth number that is less than or equal to ten. The second sprocket includes a second tooth number that is more than or equal to forty-four. 1. A multiple bicycle sprocket assembly having a rotational central axis and configured to be mounted on a bicycle hub assembly , the multiple bicycle sprocket assembly comprising:a first sprocket having a total first tooth number that is less than or equal to ten; anda second sprocket having a total second tooth number that is more than or equal to forty-four.2. The multiple bicycle sprocket assembly according to claim 1 , whereinthe total first tooth number is less than or equal to nine.3. The multiple bicycle sprocket assembly according to claim 1 , whereinthe total first tooth number is nine that is a smallest tooth number multiple bicycle sprocket assembly; andthe total second tooth number is forty-four that is a largest tooth number of the multiple bicycle sprocket assembly.4. The multiple bicycle sprocket assembly according to claim 1 , whereinthe total first tooth number is ten that is a smallest tooth number of the multiple bicycle sprocket assembly; andthe total second tooth number is one among forty-six, forty-eight and fifty that is a largest tooth number of the multiple bicycle sprocket assembly.5. The multiple bicycle sprocket assembly according to claim 1 , further comprising:at least five, in particular at least eight, most particularly at least ten additional sprockets positioned between the first sprocket and the second sprocket in an axial direction parallel to the rotational central axis.6. The multiple bicycle sprocket assembly according to claim 1 , further comprising one among:a) five additional sprockets positioned between the first sprocket and the second sprocket in ...

BICYCLE TRANSMISSION APPARATUS

A bicycle transmission apparatus comprises a controller configured to control at least one transmission device in accordance with a transmission route in response to a shift signal. The controller is configured to adjust the transmission route based on bicycle information relating to a running condition of a bicycle. 1. A bicycle transmission apparatus comprising:a controller configured to control at least one transmission device in accordance with a transmission route in response to a shift signal, the controller being configured to adjust the transmission route based on bicycle information relating to a running condition of a bicycle.2. The bicycle transmission apparatus according to claim 1 , further comprising:a bicycle-information obtaining device configured to obtain the bicycle information.3. The bicycle transmission apparatus according to claim 1 , whereinthe bicycle information includes a cadence indicating a rotational speed of a crank of the bicycle, andthe controller is configured to adjust the transmission route based on the cadence.4. The bicycle transmission apparatus according to claim 1 , whereinthe bicycle information includes a torque applied from a rider to a crank of the bicycle, andthe controller is configured to adjust the transmission route based on the torque.5. The bicycle transmission apparatus according to claim 1 , whereinthe bicycle information includes an amount of energy applied from a rider to a crank of the bicycle, andthe controller is configured to adjust the transmission route based on the amount of energy.6. The bicycle transmission apparatus according to claim 1 , whereinthe bicycle information includes a geographical location of the bicycle, andthe controller is configured to adjust the transmission route based on the geographical location.7. The bicycle transmission apparatus according to claim 1 , whereinthe at least one transmission device includes a first transmission device and a second transmission device.8. The bicycle ...

Crank assembly

A crank assembly for a bicycle includes a crank arm, multiple first and second securing members, and a sprocket unit having small, medium, and large sprockets. The small sprocket includes a toothed ring and multiple first fastening pieces. The medium sprocket includes a toothed ring, multiple second and third fastening pieces, and multiple spacing-adjustment pieces each extending obliquely and interconnecting a respective one of the second fastening pieces and a respective one of the third fastening pieces. The large sprocket includes a toothed ring and multiple fourth fastening pieces. The first securing members secure the small and medium sprockets to the crank arm. The second securing members secure the large sprocket to the medium sprocket.

NARROW - WIDE TEETH CHAINRING

A sprocket for engagement with a drive chain has a plurality of teeth extending radially from a periphery of the sprocket, including a first and a second group of teeth; the teeth of the first group and the second group are alternately arranged so that each tooth of the first group is followed by a tooth of the second group, and vice versa; each tooth of the first group having a first maximum width, each tooth of the second group having a second maximum width which is larger than the first maximum width; each tooth of the second group has a protrusion on at least one lateral face of the tooth; the outer lateral face of the protrusion extends over a first portion of the lateral face of each tooth of the second group, the length being 50% of the length of the respective tooth or less. 2. The sprocket of comprising two lateral faces claim 1 , wherein each tooth of the plurality of teeth of the second group of teeth has a protrusion on each of the two lateral faces of each tooth of the plurality of teeth.3. The sprocket of claim 1 , wherein the protrusion is located adjacent to the front flank of each tooth of the plurality of teeth of the second group of teeth claim 1 , wherein a width of the respective tooth adjacent to the rear flank is equal to the width of each tooth of the first group of teeth.4. The sprocket of claim 1 , wherein:the protrusion is located adjacent to the rear flank of each tooth of the second group of teeth;the protrusion is located in the middle between the front flank and the rear flank of each tooth of the second group of teeth; orthe protrusion on the first lateral face of each tooth of the second group of teeth is located at a different location than the protrusion on the second lateral face of the respective tooth.5. The sprocket of claim 1 , wherein each tooth of the second group of teeth comprises front edges and the front edges are chamfered.6. The sprocket of claim 1 , wherein each tooth of the plurality of teeth comprises rear edges and ...

Chain link for bicycles

A roller-type chain for a bicycle is configured with asymmetrical chain link plates, the chain link plates applicable for use with a chain with reduced chain width as in use on chain drives with a high number of gear ratios. The chain link plates are configured at the inner side of the chain loop for engagement on the teeth of the rear sprocket and of the front chain wheel. The chain link plates are further configured at the outer side of the chain loop for interaction with the chain-guiding roller on the rear gearshift mechanism.

SPROCKET WHEEL FOR A BICYCLE DRIVE

An individual chain wheel for a bicycle front crank arrangement for engaging in a drive chain includes a plurality of teeth formed on a circumference of the chain wheel and having a first and a second group of teeth. The teeth of the second group of teeth are arranged in an alternating manner between the teeth of the first group of teeth. Each tooth has a load flank via which force is transmitted between an adjacent roller of the drive chain and the respective tooth. Each tooth of the first group may also have at least one profile with an opening in the vicinity of the flank, in which a portion of an inner link plate of the drive chain, which portion protrudes beyond the roller, engages. 1. A single chain wheel for a bicycle front crank arrangement for engaging in a roller drive chain , comprising:a plurality of teeth formed on a circumference of the chain wheel and having a first and a second group of teeth, wherein the teeth of the second group of teeth are arranged in an alternating manner between the teeth of the first group of teeth, the teeth of the first group of teeth comprise a portion of greater material thickness than the teeth of the second group of teeth in a direction transverse with respect to a circumferential direction of said chain wheel,wherein each tooth has a load flank, via which force is transmitted between an adjacent chain roller of the drive chain and the respective tooth, andwherein the teeth of the second group of teeth in the radial direction of the individual chain wheel are formed with a lower height than the teeth of the first group of teeth, wherein the teeth of the second group of teeth have a height in the range from about 85% up to 90% of the height of the teeth of the first group of teeth.2. The single chain wheel according to claim 1 , wherein each tooth of the first group of teeth and/or each tooth of the second group of teeth is provided with a tapered tooth crest.3. The single chain wheel according to claim 1 , wherein the ...

Bicycle sprocket and bicycle sprocket assembly

A bicycle sprocket comprises a sprocket body, sprocket teeth, and at least one shifting facilitation area. The sprocket teeth include at least one first tooth and at least one second tooth. The at least one first tooth includes a first tooth center plane defined to bisect a first maximum axial width. The at least one second tooth includes a second tooth center plane defined to bisect a second maximum axial width. The second tooth center plane is offset from the first tooth center plane in an axial direction. The at least one shifting facilitation area is configured to facilitate a shifting operation of the bicycle chain.

Multi-sprocket assembly for a bicycle

A multi-sprocket arrangement for a rear wheel hub of a bicycle may have improved gearshift characteristics, reduced vibrations during skewed running, and improved wear characteristics. The multi-sprocket arrangement includes a multiplicity of sprockets of different diameters, wherein at least one of the sprockets has a multiplicity of teeth. Also on the circumference of said sprocket, as viewed in a circumferential direction, at least one sequence of teeth is provided in which, with regard to their material thickness, a thin tooth is followed by a thick tooth which is followed in turn by another thin tooth.

DETACHABLE CHAINRING ASSEMBLY

A detachable chainring assembly includes a first chainring, a second chainring and a locking part. The first chainring includes a first through hole. The second chainring includes a first surface, a second surface, a driven hole, and a plurality of first protrusion parts. The second surface is opposite to the first surface. The driven hole runs through the first surface and the second surface for securing a driving portion of a crank arm. The first protrusion parts protrude from the second surface and are disposed around the driven hole, and at least one of the first protrusion parts has a first locked hole. The locking part is detachably secured to the first through hole and the first locked hole such that the first chainring and the second chainring are jointly secured to each other via the locking part. 1. A detachable chainring assembly , comprising:a first chainring, comprising a first through hole running through the first chainring; a first surface;', 'a second surface opposite to the first surface;', 'a driven hole running through the first surface and the second surface for securing a driving portion of a crank arm; and', 'a plurality of first protrusion parts protruding from the second surface and disposed around the driven hole, wherein at least one of the first protrusion parts has a first locked hole; and, 'a second chainring, comprisinga locking part, detachably secured to the first through hole and the first locked hole such that the first chainring and the second chainring are jointly secured to each other via the locking part.2. The detachable chainring assembly according to claim 1 , wherein the second chainring comprises an installation portion having an open slot and a side wall disposed around the driven hole claim 1 , and when the driving portion of the crank arm is secured to the driven hole claim 1 , the driving portion of the crank arm is disposed in the installation portion and abutted against an inner surface of the side wall claim 1 , and ...

SYSTEMS AND METHODS FOR AUTOMATIC CONFIGURATION AND AUTOMATIC CALIBRATION OF CONTINUOUSLY VARIABLE TRANSMISSIONS AND BICYCLES HAVING CONTINUOUSLY VARIABLE TRANSMISSIONS

A continuously variable transmission on a bicycle may be automatically configured with little or no assistance from a user. Optical scanning devices, RFIDs, and other information capturing technology can communicate with a controller. The controller may then perform a portion or all of a configuration process. In operation, a controller may determine that calibration is needed. A calibration process may be initiated and performed with little or no user interaction. A calibration process may account for a load, a power source, or an environment. 1. A method for automatically configuring a control system on a bicycle , comprising:communicating, by a continuously variable transmission (CVT) controller executing a startup routine, a first packet of information to a system controller, the first packet of information containing a set of operating parameters for a continuously variable transmission (CVT);receiving, by the system controller, a second packet of information comprising a set of operating parameters for an electric motor or a set of parameters for a rider preference; andoperating the CVT according to a set of parameters based on the first packet of information and the second packet of information.2. The method of claim 1 , wherein the first packet of information is received from a server claim 1 , a vendor computer or a third-party computing device.3. The method of claim 1 , wherein the second packet of information is received from a server claim 1 , a vendor computer or a third-party computing device.4. The method of claim 1 , wherein the set of parameters for a rider preference includes information about a geographic area or jurisdiction claim 1 , and wherein operating the CVT is performed based on the geographic area or jurisdiction. This application is a divisional of U.S. patent application Ser. No. 16/034,659, filed Jul. 13, 2018 and scheduled to issue on Dec. 29, 2020 as U.S. Pat. No. 10,875,603, which is a continuation of U.S. patent application Ser. No ...

Multiple Sprocket Assembly for a Bicycle

A roller chain based drive train for a bicycle includes a sprocket assembly configured for mounting to a hub of a rear wheel of the bicycle. The sprocket assembly includes a smaller sprocket, a larger sprocket, and a plurality of pins connecting the smaller sprocket and the larger sprocket to each other. The pins are mounted in outer pin mount holes on the smaller sprocket and in the inner pin mount holes on the larger sprocket. 1. A roller chain based drive train for a bicycle , comprising: a smaller sprocket having a first radially outer ring with a first plurality of teeth for engaging the roller chain, the first radially outer ring also including a plurality of radially outer pin mounts, each of the radially outer pin mounts including an outer pin mount hole having a first edge radially positioned at a radial height of an outer base contour between adjacent teeth of the first plurality of teeth and a second edge located near a load flank of a tooth of the adjacent teeth;', 'a larger sprocket having a second radially outer ring with a second plurality of teeth for engaging the roller chain, the larger sprocket having a radially inner ring having a plurality of radially inner pin mounts connected to the second radially outer ring forming a single piece, each of the radially inner pin mounts including an inner pin mount hole;', 'a plurality of pins connecting the smaller sprocket and the larger sprocket to each other, the pins mounted in the outer pin mount holes on the smaller sprocket and in the inner pin mount holes on the larger sprocket;', 'a first mounting sprocket connected to the smaller sprocket by pins; and', 'a second mounting sprocket connected to the larger sprocket by pins and including a torque-transmitting profile engageable with a driver and coupled to the hub,, 'a sprocket assembly configured for mounting to a hub of a rear wheel of the bicycle comprisingwherein torque imparted to the first plurality of teeth of the smaller sprocket is transmitted ...