Oscillation damper assembly to dampen mechanical motion

The assembly has a damper cylinder (13) which is sub-divided into two chambers (13a,b) by a piston (5) moved by a connecting rod (3). Vapour is discharged through a valve (1) whose valve faces (29) are above the main part of the valve body (27). Passages (5a,b) past the valve seats are covered by the valve disc (15). The valve seat is covered by a circular valve disc in contact with a spring (21). A flow reversal disc (17) is of a thickness (s) less than that (S) of the valve disk and is arranged concentric to it. The reverse flow disc movement is dependent upon the direction of gas flow to the valve disc. The gas valve has an initial opening cross-sectional which is the sum of that admitted by the first (23) and second (25) discs. The second (25) pre-opening cross-section is determined by the reverse flow disc.

Schwingungsdämpfer mit bedarfsgerechtem Dämpfkraftkennfeld

Dämpfventil für einen Schwingungsdämpfer

Dämpfventil für einen Schwingungsdämpfer, das einen Durchlassquerschnitt aufweist, der von wenigstens einer Ventilscheibe abgedeckt wird, wobei das Dämpfventil ein in Öffnungsrichtung wirksam zuschaltbaren Voröffnungsquerschnitt aufweist, wobei der Voröffnungsquerschnitt räumlich getrennt von dem Durchlassquerschnitt angeordnet ist und ein Rückschlagventil richtungsabhängig die Durchströmung des Voröffnungsquerschnitts ansteuert, dadurch gekennzeichnet, dass das Rückschlagventil (25) von einer Federkraft in Schließrichtung vorgespannt ist, wobei sich die Federkraft am Dämpfventil (5; 7) abstützt und dass die Federkraft von einem Federelement (27) gebildet wird, das sich an der Ventilscheibe (5) des Dämpfventils abstützt.

Channelled-disc-type damper valve for actuating cylinder

A pre-choking disc (15) partly covers the entries of the through-channels (5a,b) leading through the valve and the disc is recessed (23) for the raised valve areas (21). The disc should be directly clamped to the valve body (19) and the several through-channels differ in pitch circle radii. The disc covers the channels to leave a crescent-shaped gap (17) which in each case acts as a permanent flow choke, allowing damping power to build up from a specified flow rate. The raised areas exactly equal the volume they displace on the entry side. The equalising disc (25) on the disc allows for height differences and in turn supports the valve disc (27) pressed onto the raised areas by a plate spring (29). A tension ring (31) centres the disc and holds the entire valve unit on the piston rod (9).

Damping cylinder valve design

The load-spring for the disc is of the plate or compression screw type in which case the spring acts on the disc via a support disc complete with the tip-over edge. The spring bears on the disc radially offset from the pitch circle diameter (35) of the channels in the piston rod (5). Damping medium entering the channels (17) builds up back-pressure below the disc loading the pitch circle of the channels so the effective area of the pressure is provided by the section area (37) thus applying a bending force (Fp,Fr) to disc opposed by the thrust force of the spring. The disc changes shape via the tip-over edge, giving the maximum opening when the disc bears from below on the spring or when the bending force equals that of the spring.

Vibration damper having piston in pressure tube

Vibration damper in which the piston sides (31, 33) on the part of the piston (5) for the engagement of the holding surfaces (27, 29) of the piston ring (23) have profiled surfaces. The distance between one piston side and an imaginary reference plane (71) running parallel to the piston side is such that a tolerance dimension is alternately exceeded and undershot. The profiling applies to the upper and lower surfaces of the piston, and consists of a raised section (67) and a depressed section (69).

Vibration damper acting as a function of the load

The present invention creates a vibration damper acting as a function of the load in that the recoil force of at least one spring supported on the vehicle body is exerted on a damping valve acting both in a tensile and in a compression direction. The spring supported on the vehicle body may be the vehicle spring itself or it may be a spring supporting a part. Allowing additional bump stops to act on the damping valve is also feasible so that, for example, starting from a certain compression travel of the piston rod the bump stop increases both the spring force and the damping force.

SHOCK ABSORBER Of OSCILLATIONS

L'invention concerne un amortisseur d'oscillations, comportant un cylindre dans lequel est guidée en déplacement axial une tige de piston (5), dans lequel un premier piston (7) est monté de façon stationnaire et un second piston (13) est monté en translation axiale à l'encontre de la force d'un ressort sur la tige de piston, le cylindre comprend une chambre de travail (29) côté tige de piston, une chambre de travail (23) éloignée de la tige de piston (5) et une chambre de travail (27) entre les deux pistons, et des ouvertures de passage équipées de valves commandent une liaison entre les chambres de travail. Le second piston (13) comprend des deux côtés au moins un ressort de rappel respectif (19; 21), et le piston (13) est monté en translation axiale dans deux directions à l'encontre des ressorts de rappel (19; 21). The invention relates to an oscillation damper, comprising a cylinder in which a piston rod (5) is guided in axial displacement, in which a first piston (7) is stationary and a second piston (13) is mounted. in axial translation against the force of a spring on the piston rod, the cylinder comprises a working chamber (29) on the piston rod side, a working chamber (23) remote from the piston rod (5 ) and a working chamber (27) between the two pistons, and passage openings equipped with valves control a connection between the working chambers. The second piston (13) comprises at least two respective return springs (19; 21) on both sides, and the piston (13) is mounted in axial translation in two directions against the return springs (19; 21) .

Anti-swing damping system, has two valve disks with respective circular surfaces activated via bypass groove, and throttling positioned in zone of circular surfaces of one valve disk

Un amortisseur comporte un cylindre (3) rempli d'un fluide, où se déplace une tige (1) avec un piston (5), un by-pass (49) reliant une chambre (7) côté tige à une chambre (9) opposée, en fonction de la position du piston (5), lequel présente un canal (13 ; 15) couvert d'un disque de valve (19 ; 21) côté sortie ; ainsi, une surface (37 ; 39) sollicitée en pression à l'ouverture existe sur le disque (19 ; 21) ; celui-ci présente une deuxième surface (51 ; 53) sollicitée en pression, séparée de la première dans l'état fermé du disque (19 ; 21) et mise en circuit via le by-pass (49), pour que les deux surfaces (37 ; 51 ; 39 ; 53) s'additionnent, la deuxième surface étant réalisée, par rapport à la première, jusqu'à une course déterminée avec son emplacement d'étranglement (19d ; 21d) dans la zone de la deuxième surface.

SHOCK ABSORBER Of OSCILLATIONS WITH a THRUST OF WATER PRESSURE

Un amortisseur d'oscillations avec butée hydromécanique comprend un cylindre rempli d'un fluide amortisseur dans lequel une tige de piston est axialement mobile conjointement avec un premier piston qui subdivise le cylindre en une première et une deuxième chambre de travail (15). À partir d'une course définie, un deuxième piston est entraîné par le mouvement de la tige (9), ce piston est équipé d'une valve (29 ; 31), qui sépare une troisième chambre de travail (27) de la deuxième chambre de travail (15) et qui est sollicité par un ressort de rappel (47) en direction de la tige. Le mouvement de la tige agit sur le deuxième piston (25) via un ressort de transmission (41 ; 45) et repousse la totalité du fluide amortisseur refoulé hors de la troisième chambre de travail (27) à travers la valve (29 ; 31) du deuxième piston (25) dans la deuxième chambre de travail (15).

Suspension strut for motor vehicle has damping fluid control valve controlled by linkage connected to piston rod

The suspension strut for a motor vehicle has a cylinder containing a piston with piston rod. A flow control valve is adjusted using a function of the movement of the piston rod. The sensor for the rod movement has a regulator linkage (139) which provides a correction to the flow control valve (27) independently of the direction of reopening. The sensor can be a connected to a stabiliser (141).

VIBRATION DAMPER

Hydropneumatic vibration damper with sintered filter

The invention relates to a hydropneumatic vibration damper, there being provided, for the purpose of compensating for the drop in damping force which occurs during run time, a fine filter which forms a bypass duct for the intake and discharge valves. The pore size and filter area of the fine filter are tailored in such a way that, as a result of impurities being filtered out, a change in the flow resistance in this bypass is caused.

Vibration damper with hydraulic pressure

Vibration damper comprising a piston which is connected to a piston rod and is arranged in an axially moveable manner in a cylinder and subdivides the cylinder interior, filled with damping fluid, into two working chambers which are connected to one another by means of damping valves of the piston, while provided at the lower end of the cylinder is a bottom valve which, together with a piston-rod guide, centres and fastens the cylinder in a container, there being a compensation chamber between the cylinder and container, which compensation chamber is in connection with the lower working chamber via the bottom valve, the lower working chamber exhibiting at least one throttle section as hydraulic pressure stop, which throttle section takes effect as from a specific retraction stroke position via a piston-side or piston-rod-side component, and the hydraulic pressure stop is in operative connection with a changeover valve (15) which closes upon retraction into the pressure stop and opens with ...

VALVE Of DAMPING FOR a SHOCK ABSORBER Of OSCILLATIONS

L'invention concerne une soupape d'amortissement pour un amortisseur d'oscillations, laquelle présente une section de passage recouverte par au moins un disque de soupape (5), la soupape d'amortissement (5; 7) présentant une section d'ouverture préliminaire (29) susceptible d'être mise en service et agissant en direction d'ouverture, la section d'ouverture préliminaire (29) étant agencée de façon séparée dans l'espace par rapport à la section de passage, et un clapet anti-retour (25) pilotant l'écoulement à travers la section d'ouverture préliminaire (29) en fonction de la direction, caractérisée en ce que le clapet anti-retour (25) est mis sous précontrainte en direction de fermeture par la force d'un ressort, la force du ressort prenant appui contre la soupape d'amortissement (5; 7).

Kolben-Zylinderaggregat mit wegabhängigem Dämpfkraftfeld

Hydraulically acting vibration damper with adjustable damping force

The invention relates to a hydraulically acting vibration damper with an adjustable damping force for vehicles. The damper comprises a cylinder filled with damping fluid, the interior of which is divided into two working chambers by a piston connected to a piston rod and has adjustable piston damping. For this purpose, there is, in addition to the customary piston damping valves, a bypass passage, the cross-section of which can be varied in a controlled manner. In order to obtain a change in the damping force which is effective over the entire speed range, the bypass passage has a bypass-damping valve connected in series with it, which can be operated by the pressure difference between the working chambers.

Vibration damper

Vibration damper

A vibration damper comprises a cylinder 13 divided into two fluid chambers 13a, 13b by a piston 1 secured on a piston rod 3, the piston 1 comprising a piston body 5 with fluid passages 5a, 5b which are closed off by valve plates, and at least one piston ring 11 which encloses the peripheral surface 77 of the piston body 5 and engages against the axial faces of the piston body 5. The piston ring 11 slides in the cylinder 13. The piston body 5 is disc-shaped, in one piece and formed by a stamping process, whereby starting from a piston base body the piston body regions raised on one axial face of the piston are formed as recesses on the axially opposing face. The piston ring 11 is axially movable on the piston body 5, according to the direction of movement of the piston and is controlled by the frictional force between the cylinder 13 and the piston ring 11, and a variable preliminary orifice 73, 75, 55 is formed between adjacent faces of the piston ring 11 and the piston. The opening of ...

Damper, has regulator passing through shunt such that two surfaces, one stressed in pressure in opening direction and another stressed in pressure when regulator is closed, are combined

The damper has a regulator with a surface (37, 39) stressed in pressure in an opening direction and another surface (51, 53) stressed in pressure and separated from the former surface when the regulator is closed. The regulator passes through a shunt (49) in such a way that the two surfaces stressed in pressure are combined. The shunt connects a work chamber near a piston rod with a work chamber removed from the rod.

Damping control valve suspension strut

The damping control for the suspension strut has flow ducts through the damping piston fitted with control valves. The main flow control valve (23) is bridged by a small flow opening (23d) leading to a small flow rate control valve (21) in series with the main valve. This small flow valve has a single plate element (21a) held onto the valve seat by a single cup spring (21d). The small flow rate control valve operates at small to medium flow rates and supplements the main valve control. The main valve is operated by a much stronger spring (23a). The two springs are arranged in series or each valve element is located onto a separate valve stop. The small flow opening through the main valve seat provides sufficient flow to match the small valve characteristics.

Fluid shock absorber with temperature compensation

SHOCK ABSORBER Of OSCILLATIONS THROUGH ADJUSTABLE DAMPING

L'amortisseur d'oscillations (1) à force d'amortissement réglable, comprend un cylindre (3), dans lequel une tige de piston (5) est agencée en déplacement axial, et définissant une chambre de travail (9); ladite chambre de travail (9) comporte à l'extrémité une valve d'amortissement (11) dont l'effet d'étranglement est réglable. Le cylindre (3) est suivi par un support (25) en forme de douille qui comprend un piston (31) réglable axialement et à son tour en liaison d'action avec la valve d'amortissement (11). The vibration damper (1) with adjustable damping force, comprises a cylinder (3), in which a piston rod (5) is arranged in axial displacement, and defining a working chamber (9); said working chamber (9) comprises at the end a damping valve (11) whose throttling effect is adjustable. The cylinder (3) is followed by a sleeve-shaped support (25) which comprises a piston (31) adjustable axially and in turn in action with the damping valve (11).

PISTON HAS PISTON RING FOR the SEALING

Dans un piston qui comporte un segment de piston serré sur le piston, et destiné à un ensemble piston-cylindre, le segment de piston recouvrant une surface périphérique d'enveloppe du piston et assurant une étanchéité à l'encontre du cylindre, le segment de piston 23 présente une largeur, qui est plus grande que la surface périphérique d'enveloppe 25, de sorte que l'on est en présence d'une saillie 27 du segment de piston par rapport au piston 5, qui est déformée en une extrémité élastique en ressort 29 s'appuyant, côté frontal, sur le piston 5. In a piston which has a piston ring clamped on the piston, and intended for a piston-cylinder assembly, the piston ring covering a peripheral surface of the piston casing and providing a seal against the cylinder, the piston ring piston 23 has a width, which is greater than the peripheral casing surface 25, so that there is a projection 27 of the piston ring with respect to the piston 5, which is deformed into an elastic end spring 29 resting, front side, on piston 5.

SHOCK ABSORBER UNIT FOR VEHICLES

SHOCK ABSORBER UNIT FOR VEHICLES In a shock absorber unit for vehicles of the doubletube type a piston rod guiding and sealing unit is provided adjacent a first end of a cylinder and a container surrounding the cylinder, and a bottom valve unit is provided at a second end of the cylinder and the container, respectively. The cavity within the cylinder is divided into two working chambers by a piston unit. The piston unit is connected to a piston rod extending through the piston rod guiding and sealing unit. The cavity within the cylinder is filled with a damping liquid. The compensation chamber defined radially between the cylinder and the container is partially filled with damping liquid and partially filled with gas. adjacent the piston rod guiding and sealing unit, there is provided a by-pass connecting the working chamber adjacent the piston rod guiding and sealing unit and the compensation chamber. This by-pass defines a throttling flow cross-sectional area. This flow cross-sectional ...

Convey equipped with a shock absorber with variable characteristics, and shock absorber for such a vehicle

Dans un véhicule avec une superstructure, un train de roulement avec roues à pneumatiques sur lesquelles est supporté le véhicule, des ressorts de suspension et des amortisseurs sont montés entre les roues et la superstructure et subissent en fonction de la course de suspension des roues une variation de longueur sous la forme d'un trajet de déplacement entre un piston et un tube de compression de l'amortisseur et chasse alors un fluide d'amortissement à travers un dispositif d'amortissement. L'amortisseur possède un champ de caractéristiques d'amortissement (1) constitué par au moins trois zones caractéristiques d'amortissement (7, 13, 15). Une prermière zone (7) est conçue de manière à exercer une force d'amortissement très faible. Cette zone (7) est agencée dans la région de la position normale du débattement de l'amortisseur et se transforme dans la direction de traction et dans la direction de compression en des zones caractéristiques d'amortissement (13, 15) qui procurent une force d'amortissement plus importante. In a vehicle with a superstructure, a running gear with pneumatic wheels on which the vehicle is supported, suspension springs and shock absorbers are mounted between the wheels and the superstructure and undergo a variation depending on the suspension travel of the wheels. length as a travel path between a piston and a shock absorber compression tube and then drives damping fluid through a damper. The damper has a field of damping characteristics (1) consisting of at least three damping characteristic zones (7, 13, 15). A first zone (7) is designed so as to exert a very low damping force. This zone (7) is arranged in the region of the normal position of the shock absorber travel and transforms in the direction of traction and in the direction of compression into characteristic damping zones (13, 15) which provide a force. greater depreciation.

VALVE Of DAMPING FOR a SHOCK ABSORBER Of OSCILLATIONS

SHOCK ABSORBER WHOSE PISTON COMPRISES SECTIONS Of INITIAL OPENING

Dans un amortisseur dont le tube de cylindre est divisé en deux chambres de travail, par un piston fixé à une tige de piston 3, le piston comprenant un corps de piston 5 présentant des canaux de passage de fluide, qui sont recouverts par des disques de soupape sur des corps d'appui comportant des surfaces d'appui de soupape, et le corps de piston étant en liaison de glissement avec le tube de cylindre par l'intermédiaire d'au moins un segment de piston, qui recouvre la surface périphérique du corps de piston, le segment de piston 11 est conçu de manière à être mobile axialement en fonction du sens du mouvement, et est commandé par la force de friction agissant entre le tube de cylindre 13 et le segment de piston, et entre les surfaces du segment de piston dirigées vers le piston et le piston, est réalisée au moins une section d'ouverture initiale, qui est libérée suivant la position axiale du segment de piston par rapport au corps de piston.

Fan impeller automatic clutch - uses mechanical friction for lower speed range d viscosity friction with speed limiting

The impeller (3) is bolted onto the composite hub (1) consisting of a split housing (2) and the extended hub (5). The latter is shaped to form a radially extended gap (6) filled with silicon oil. At normal speed the two legs of the extended radial hub, being pre-stressed in outward direction engage against the walls of the housing by means of a step-shaped surface of the extension. At higher speeds, when the shaft input is increasing, at a certain point a slip develops between the extended hub and the housing walls. At this point the oil particles trapped between the stepped surface of the extension and the housing wall limit, due to viscosity friction, the amount of slip to a level which prevents the fan impeller from becoming too noisy.

A vibration damper with fixed and moving pistons

A vibration damper 1 comprises a cylinder 3 in which a piston rod 5 is guided for axial movement. The piston rod 5 carries a piston assembly comprising a first fixed piston 7 and a second piston 13 which is axially movable against a spring force. The cylinder 3 has first and second working chambers 23, 29 separated by the piston assembly, and a third working chamber 27 between the two pistons. The piston assembly has valve-controlled passages controlling communication between the working chambers. The spring force for the second piston 13 is provided by at least one return spring 19, 21 on each axial side, and the second piston 13 is movable in each axial direction against the return springs 19, 21.

Vibration damper

A vibration damper 1 comprises a cylinder 3 in which a piston rod 5 is guided for axial movement. The piston rod 5 carries a piston assembly comprising a first fixed piston 7 and a second piston 13 axially movable against a spring force. The cylinder 3 has first and second working chambers 23, 29 separated by the piston assembly, and a third working chamber 27 between the two pistons. The piston assembly has valve-controlled passages controlling communication between the working chambers. The second piston comprises two second piston parts 13a, 13b, each being urged into a normal position by at least one return spring 19, 21.

DEVICE Of DAMPING THROUGH VARIABLE DAMPING

Schwingungsdämpfer mit hubabhängiger Dämpfkraft

Schwingungsdämpfer, fassend einen dämpfmediumgefüllten Zylinder, in dem eine Kolbenstange mit einem Kolben axial beweglich angeordnet ist, wobei ein Bypass einen vom Kolben getrennten kolbenstangenseitigen Arbeitsraum mit einem kolbenstangenfernen Arbeitsraum in Abhängigkeit der Hublage des Kolbens verbindet, wobei der Kolben für mindestens eine Durchströmungsrichtung mindestens einen Durchlasskanal aufweist, der austrittsseitig von mindestens einer Ventilscheibe zumindest teilweise abgedeckt wird, so dass an der Ventilscheibe eine in Öffnungsrichtung druckbeaufschlagte Fläche vorliegt, wobei die Ventilscheibe zu der besagten druckbeaufschlagten Fläche eine zusätzliche zweite druckbeaufschlagte Fläche aufweist, die von der ersten bei geschlossener Ventilscheibe getrennt ist und über den Bypass zuschaltbar ist, so dass sich dann die beiden druckbeaufschlagten Flächen addieren, wobei die zweite druckbeaufschlagte Fläche der Ventilscheibe zu der ersten druckbeaufschlagten Fläche der Ventilscheibe zumindest bis zu einem bestimmten Ventilweg der Ventilscheibe im Bereich der zweiten druckbeaufschlagten Fläche mit ihrer Drosselstelle ausgeführt ist.

Lastabhängig wirkender Schwingungsdämpfer

Schwingungsdämpfer mit veränderbarer Dämpfkraft

Vibration damper

FLUID SHOCK ABSORBER WITH TEMPERATURE COMPENSATION

Nachstelleinrichtung fuer die Zwischenanpressplatte von Zweischeibenreibungskupplungen mit abgebogenem Zylinderstift

Schwingungsdämpfer mit hubabhängiger Dämpfkraft

Schwingungsdämpfer, fassend einen dämpfmediumgefüllten Zylinder, in dem eine Kolbenstange mit einem Kolben axial beweglich angeordnet ist, wobei ein Bypass einen durch den Kolben getrennten kolbenstangenseitigen Arbeitsraum mit einem kolbenstangenfernen Arbeitsraum in Abhängigkeit der Hublage des Kolbens verbindet, wobei der Kolben für mindestens eine Durchströmungsrichtung mindestens einen Durchlasskanal aufweist, der austrittsseitig von mindestens einer Ventilscheibe zumindest teilweise abgedeckt wird, so dass an der Ventilscheibe eine in Öffnungsrichtung druckbeaufschlagte Fläche vorliegt, dadurch gekennzeichnet, dass die Ventilscheibe (19; 21) zu der besagten druckbeaufschlagten Fläche (37; 39) eine zusätzliche zweite druckbeaufschlagte Fläche (51; 53) aufweist, die von der ersten bei geschlossener Ventilscheibe (19; 21) getrennt ist und über den Bypass (49) zuschaltbar ist, so dass sich dann die beiden druckbeaufschlagten Flächen (37; 51; 39; 53) addieren, wobei die zweite druckbeaufschlagte ...

Vibration damper

Centrifugal coupling with snap action operating between rotating parts - line of action of spring contact force is near to dead point

A snap action centrifugal governor operates between a drive motor and an air pump. A vee belt pulley wheel (1) is driven from a motor and carries two pivoted (13) centrifugal weights (3). Two springs (6, 7) force the weights apart and exert contact pressure on a friction pad (4) rigidly fixed to a central sleeve attached to the input shaft of the pump. The line of action of the one spring (6) lies just within the line between the pivot centres. In operation the coupling is engaged until the centrifugal force is sufficient to move the line of action of the spring (6) above the dead point and the coupling disengages with a snap action. When the speed falls the second spring (7) moves the weights until the spring (6) action crosses over the dead point again and the coupling engages with a snap action.

Vibration damper with damping force characteristics to match demands

Vehicle, comprising a vehicle body, a chassis with tyred wheels, on which the vehicle is supported, a number of vehicle support springs and vibration dampers which are fitted between the wheels and the vehicle body and execute an axial length adjustment as a function of the suspension travel, which adjustment manifests itself as a displacement travel between a piston fixed on a piston rod guided by a piston rod guide and a compression tube of the vibration damper and in the process displaces a damping medium through a damping device, means of fixing the piston rod and the compression tube to the vehicle body and the wheel, the vibration damper having a damping force characteristic which comprises at least three individual damping force characteristics, a first damping force characteristic of which is designed in such a way that it exerts a very small damping force, this damping force characteristic being arranged in the area of the normal compression position of the damper and merging in the extension and compression direction respectively into a damping force characteristic which, in relation to the stroke travel results in a greater damping force than the first damping force characteristic.

Dämpfkrafteinrichtung mit veränderbarer Dämpfkraft

Dämpfungseinrichtung mit veränderbarer Dämpfkraft, umfassend einen Zylinder, in dem ein eine Kolbenstange axial beweglich angeordnet ist, und ein verstellbares Dämpfungsventil, welches in Abhängigkeit des Einfederungsweges eines Achsteils von einer Gebereinrichtung angesteuert wird, dadurch gekennzeichnet, daß die Gebereinrichtung eine Gleichrichtungseinrichtung umfaßt, durch welche eine mit demDämpfungsventil verbundene Ausgangskoppelstange (199) unabhängig von der Federungseinrichtung einer Eingangskoppelstange eine einseitig gerichtete Stellkraft auf das verstellbare Dämpfungsventil ausübt, indem die Gleichrichtungseinrichtung als ein Getriebe ausgeführt ist mit einer Wippe (151, 193) an der zwei Koppelstangen (195; 197) angreifen, wobei jede Koppelstange (195; 197) für jeweils eine Kraftübertragungsrichtung einen Freigang (201; 203) aufweist, so dass die Koppelstangen (195; 197) innerhalb des Getriebes eine Stellkraft nur in eine Richtung übertragen können.

Schwingungsdämpfer mit richtungsabhängigem Voröffnungsquerschnitt

Vibration damper with hydraulic pressure stop has piston rod movement acting on second piston via transmission spring

The damper has a cylinder filled with damping fluid, a piston rod and two pistons (11, 25). The piston rod movement acts on the second piston (25) via a transmission spring (41, 45). All the displaced damping fluid from the third working cavity (27) is displaced through the slide valve (29, 31) of the second piston into the second working cavity (15).

Vibration damper with stroke-dependent damping force

Vibration damper, containing a damping medium-filled cylinder, in which a piston rod with a piston is installed with freedom of axial movement, where, as a function of the stroke of the piston, a bypass connects a working space on the piston rod side to a working space on the side away from the piston rod, the two spaces being separated from each other by the piston, where the piston has at least one through-channel for at least one flow direction, the outlet side this channel being at least partially covered by at least one valve disk, so that a surface is present on the valve disk upon which pressure can act in the opening direction of the disk, where, in addition to the said pressure-actuated surface, the valve disk also has a second pressure-actuated surface, which is separated from the first when the valve disk is closed and which can be put into action by the bypass, so that the effects of the two pressure-actuated surfaces are added to each other.

Automobile shock absorber has piston rod fitted with fixed and axially sliding pistons and equalization space concentric to shock absorber cylinder

The shock absorber (1) has a cylinder (3) containing an axially displaced piston rod (5), provided with a fixed piston and a spring-loaded axially sliding piston, with a cylinder working space (27) between the pistons selectively connected to the cylinder working spaces (23,29) on either side of the piston set via controlled valves and an equalization space for the displaced volume upon the piston movement, as in P 10041199.1. The equalization space is concentric to the cylinder and communicates with at least one cylinder working space.

Dämpfkrafteinrichtung mit verstellbarer Dämpfkraft

Dämpfungseinrichtung mit veränderbarer Dämpfkraft, umfassend einen Zylinder, in dem eine Kolbenstange axial beweglich angerodnet ist, wobei ein verstellbares Dämpfventil in Abhängigkeit des Einfederungsweges eines Achsteils angesteuert wird, wobei die Ansteuerung des verstellbaren Dämpfventils von einer Gebereinrichtung erfolgt, wobei die Gebereinrichtung eine Gleichrichtungseinrichtung umfaßt, die unabhängig von der Einfederungsrichtung eine gleichgerichtete Stellgröße auf das verstellbare Dämpfventil wirksam werden läßt.

Vibration damper has valve body provided with cushioning valve which is a slide valve whose throttle slide is moved by temperature-dependent valve unit

The vibration damper has a valve body provided with a cushioning valve (39). The cushioning valve is controlled based on a temperature-dependent valve unit (45). The cushioning valve is a slide valve whose throttle slide (43) is moved by the temperature-dependent valve unit. The valve body is arranged between two working spaces (9,11) which are partly filled with cushioning medium. The cushioning valve is bypassed between the working spaces.

Testing machine for vibration dampers (vibrational absorbers)

The invention provides a testing machine for vibration dampers which renders it possible to conduct for a given speed and stroke setting a prescribed test cycle which permits the damping forces for the prescribed test speeds to be determined using the one prescribed setting. This is achieved by providing the drive unit of the testing machine with a cam mechanism which produces a reduced speed characteristic at the reversing points.

Schwingungdämpfer mit temperaturunabhängiger Dämpfkraft

Vibration damper

A vibration damper includes a cylinder in which a piston rod is guided so as to be axially movable. A first piston is mounted stationary on the piston rod and a second piston is mounted so as to be displaceable axially on the rod against a spring force. The cylinder has a work space at the piston rod side, a work space remote of the piston rod, and a work space between the two pistons. Through-openings which are outfitted with valves control a connection between the work spaces. The second piston has at least one return spring on both sides, and the piston is mounted so as to be displaceable axially in two directions against the return springs.

Kolben-Zylinderaggregat

Vibration damper with stroke-dependent damping force

A piston rod with a piston is installed with freedom of axial movement in a damping medium-filled cylinder, where, as a function of the stroke position of the piston, a bypass connects the two working spaces separated from each other by the piston. The piston has at least one through-channel for at least one flow direction, which channel is at least partially covered on the outlet side by at least one valve disk, so that a first pressure-actuated surface to which pressure can be applied in the opening direction is present on the valve disk. In addition to the first pressure-actuated surface, the valve disk has a second pressure-actuated surface, which is separated from the first when the valve disk is closed and which can be actuated via the bypass, in which case the effects of the two pressure-actuated surfaces are additive. The second pressure-actuated surface of the valve disk, in addition to the first pressure-actuated surface of the valve disk, is designed with its throttle point in ...

Vorgesteuertes Dämpfungsventil mit schwingungsdämpfergerechten Kennlinien

Mehrscheibenreibungskupplung mit kontinuierlicher Nachstellvorrichtung und Abhubbegrenzung mittels schraeggestellter Blattfeder

Kolben-Zylinderaggregat mit wegabhängigem Dämpfkraftfeld

Vibration damper for use in car has fixed piston and sliding piston mounted on same piston rod, sliding piston acting against springs on either side biasing it in opposite directions

The vibration damper for use in a car has a fixed piston (7) and a sliding piston (13) mounted on the same piston rod (5). The sliding piston acts against springs (19, 21) on either side biasing it in opposite directions.

Force transducer for a measuring machine

A very simple force transducer is provided for a vibration-damper test machine by the present invention owing to the fact that the force transducer consists of at least two load cells which are designed for different measuring ranges and are connected in series. Here, the load cells are designed for different rated loads, and in an arrangement of two load cells the load cell allocated to the lower rated load has stops which limit the displacement allocated to the rated load of the load cell.

Oscillation damper with adjustable damping force, for motor vehicle

The adjustable damping valve(15) with equal-sided spring deflection and excursion of the piston rod(7) on one axle of the vehicle, or with one-sided excursion, has a damping force setting which is smaller than the damping force of the additional damping valves(35,39). On one axle of the vehicle the damping force setting with a one-sided spring deflection of the piston rod is greater on the adjustable damping valve than the setting of the additional valves.

Damping valve for vibration damper has passage connected to another passage by valve consisting of plate biased by spring fitted between it and first valve plate

The damping valve for a vibration damper has a flow passage (9) in a piston (3) which is closed by a valve plate (5) biased by a plate spring (7). A second passage (29) can be connected to the first when a valve (25) opens. This consists of a valve plate (23) biased by a spring (27) fitted between it and the plate (5) of the first valve.

Sprung suspension strut for motor vehicle

The sprung strut has a piston (2) connected to a rod (1) axially movable in a rod guide (5) and having a seal (3). The rod guide has a damping valve (16). The strut has a helical spring (12) between a chassis mounting and a holder (7) on the strut. A ring (13) is supported on the spring holder or to a disc (4) connected to the holder and transmits additional spring force over the spring carrier (11) onto the support spring (12). The ring can be attached to the holder via a mechanical spring, a pneumatic spring and an air cushion.

Schwingungsdämpfer mit temperaturkompensierter Dämpfungscharaktersitik

Schwingungsdämpfer, umfassend einen Ventilkörper zwischen zwei zumindest teilweise mit Dämpfmedium gefüllten Räumen mit mindestens einem ersten Dämpfventil, wobei zu diesem Ventil zwischen den besagten Räumen ein Bypass ausgeführt ist, der an ein weiteres Dämpfventil angeschlossen ist, wobei das weitere Dämpfventil in Abhängigkeit eines temperaturabhängigen Ventilelements ansteuerbar ist und als ein Schieberventil ausgeführt ist, dessen Drosselschieber von dem temperaturabhängigen Ventilelement bewegt wird, dadurch gekennzeichnet, dass der Bypass (41) im Ventilkörper (7) ausgeführt ist und der Drosselschieber (43) auf einer Kolbenstange (5) axial beweglich gelagert ist, wobei das erste Dämpfventil (15; 19; 25) eine starre Stützscheibe (25) aufweist, die das temperaturabhängige Ventilelement (45) des weiteren Dämpfventils (39) trägt.

Vibration damper for variety of applications

The piston body (5) which divides the cylinder tube into two work chambers is disc-shaped and is stamped out in one piece. When starting from the main body (5c) the areas (19,45) embossed on one side of the piston are formed as indentations (43) on the axially opposite side of the piston. The piston body has a bearing support ring whose axial height matches that of the bearing support faces of the valve. When using a pre-opening cross-section (31) this can be formed by a valve disc in connection with at least one fluid passage (5a,5b). An angular ring can be mounted on one side of the piston for the plate spring to act as a centring support device.

Vibration absorber for operating a cylinder filled with an absorbent medium has a piston rod and piston moving on-axis

For through-flow, a piston (5) has a passage channel partly covered on an outlet side by a valve plate (VP) (19) so that on the VP a first surface (FS) is impinged by pressure in an opening direction. The VP has a second surface (SS) impinged by pressure (51) separate from the FS when the VP is closed and switched on via a temperature-controlled bypass (Azu) so as to cumulate the FS and SS.

Piston having fluid-tight segment

The piston has a segment (23) having a length, which is much greater than the peripheral surface of the cover (25). The piston has a projection (27) in the segment (23) which is deformed elastically at one end by a spring (29). The peripheral surface of the cover (25) may be arranged inside the length of the segment (23) of the piston. The elastic ends of the spring may be at each opposite end of the piston and the spring may be in the form of an arc of a circle.

Schwingungsdämpfer mit hubabhängiger Dämpfkraft

Schwingungsdämpfer, umfassend einen dämpfmediumgefüllten Zylinder, in dem eine Kolbenstange mit einem Kolben axial beweglich angeordnet ist, wobei ein Bypass einen vom Kolben getrennten kolbenstangenseitigen Arbeitsraum mit einem kolbenstangenfernen Arbeitsraum in Abhängigkeit der Hublage des Kolbens verbindet, wobei der Kolben für mindestens eine Durchströmungsrichtung mindestens einen Durchlasskanal aufweist, der austrittsseitig von mindestens einer Ventilscheibe zumindest teilweise abgedeckt wird, so dass an der Ventilscheibe eine in Öffnungsrichtung druckbeaufschlagte Fläche vorliegt, wobei die Ventilscheibe zu der besagten druckbeaufschlagten Fläche eine zusätzliche zweite druckbeaufschlagte Fläche aufweist, die von der ersten bei geschlossener Ventilscheibe getrennt ist und über den Bypass zuschaltbar ist, so dass sich die beiden druckbeaufschlagten Flächen addieren.

Piston damping valve has axially movable piston ring retained in defined position in relation to damping valve by at least one spring and therefore determines flow passage of flow path between two working chambers of oscillation damper

The piston damping valve has an axially movable piston ring influencing a flow path between two working chambers of an oscillation damper. The piston ring (23) is retained in a defined position in the relation to the damping valve (5) by at least one spring (41) and therefore determines a flow passage of the flow path. A first spring applies a spring force with movement of the piston rod (7) in the extending direction, and a second spring applies a spring force with movement of the piston rod in the retracting direction.

Vibration damper with variable damping force for vehicle suspension

The vibration damper has a stabiliser which controls the adjustable damping valve (15). The damper has further valves (35,37,39) whose damping effect is independent from the control of stabiliser. At least one of the further valves (35,37) is located on a piston (31), and one valve (39) is formed as a foot valve. The stabiliser acts together with a hinged tie bar which affects the damping valve (15) via a transmission member (17).

Suspension system for a motor vehicle

The invention relates to a suspension system for a motor vehicle, which is arranged between a vehicle wheel and a vehicle body and in which a level control device is provided for maintaining the level of the motor vehicle. This suspension system has a bearing spring with a positive, relatively high rigidity and a compensating spring of lower rigidity. A suspension system of simple design comprising low-cost parts, which in the level position has a spring travel range with a low spring rate, is created in that the compensating spring is formed by at least one pre-loaded disc spring, which is connected in series with the bearing spring, whilst the level control device provided with an additional spring is arranged so that it acts parallel to this.

HYDROPNEUMATISCHER ZWEIROHR-SCHWINGUNGSDAEMPFER MIT TEMPERATURKOMPENSATION DER DAEMPFKRAEFTE

Schwingungsdämpfer mit richtungsabhängigem Voröffnungsquerschnitt

Vibration damper acting as a function of load

The present invention provides a vibration damper acting as a function of the vehicle load, the reaction force of a spring supported against the vehicle body being exerted on a damping valve acting both in the tension and compression direction. The invention furthermore provides load-dependent adjustment of the characteristic in the pre-opening range as well, to this end the damping valve being formed by a first valve and a second valve. Assigned to each of these valves is a valve seat and a pre-opening cross-section, a spring element having a spring force greater than the supporting spring in the case of a low vehicle load and a spring force smaller than the supporting spring in the case of a high vehicle load being arranged between the valves.

Clamping device for clamping vibration dampers in a test machine

Adjustable resonance damper for use in cars has valve at top end of cylinder whose throttle effect can be adjusted and cap fitted at end of cylinder containing additional axially adjustable piston which cooperates with valve

The adjustable resonance damper has a valve (11) at the top end of the cylinder (3) whose throttle effect can be adjusted. The novelty is that a cap (25) fitted at the end of the cylinder which contains an additional axially adjustable piston (31) which cooperates with the valve.

Schwingungsdämpfer mit Vordrosselscheibe

Ram throttle valve

The valve plug divides a cylinder filled with liquid and/or gas, and contains through-passages covered by a valve plate at the outlet side. The plate forms part of a throttle passage between the passage outlets and a chamber in the cylinder, and the passage minimises noise generated by the pressure drop which takes place. Two or more concentric annular supporting ribs (29,31) at the outlet side (25) of the passages (23) through the plug form an annular passage (33) working with a covering throttle-passage plate (35). The annular passage is connected via an inlet port (41) to the outlet side of one or more of the passages through the plug, and has an outlet port (45) offset from the inlet one in the peripheral direction. The inlet and/or outlet port can be formed in the throttle-passage plate, over which there is a covering plate (37).

Kolben mit Kolbenring

Vibration damper has flow connection between working chambers of cylinder with radial offset, whereby first section of flow connection is constructed radially outside one valve seat surface and second section radially inside other

The vibration damper has a cylinder divided into two chambers by a damping valve. The flow connection (13) between the working chambers (9,11) has a radial offset, whereby a first section (35) of the flow connection is constructed radially outside one of two valve seat surfaces (31), and a second section (37) is constructed radially inside the other valve seat surface (33). The valve disc (21) is elastically constructed, and the valve seat surface (31) for the locating of the upper side (47) of the valve disc has a different diameter than the valve seat surface for the contact of the underside (45).

Oscillation damper with piston fixed to piston rod

The piston body is connected to the cylinder pipe (13) by at least one axially moving piston ring (11). The piston ring is controlled by the frictional force produced between the cylinder pipe and piston ring. At least one advanced opening is positioned between the piston ring surfaces facing the piston and the piston. The advanced opening is attached to a duct (73) joining the top and bottom piston side near the piston body's peripheral surface (77).

VIBRATION DAMPING DEVICE HAVING ADJUSTABLE DAMPING FORCE

PROBLEM TO BE SOLVED: To provide an adjustable damping valve enabling a simple connection to a vibration damping device. SOLUTION: In this vibration damping device having a cylinder and an adjustable damping force, a piston rod is axially movably arranged in the cylinder, the cylinder is formed into an operation chamber, the operation chamber has the damping valve in its end side, the damping valve is adjustable relative to its throttling operation, a sleeve-shaped support body is axially connected to the cylinder, the support body has an axially adjustable piston, and the piston is operationally connected to the damping valve. COPYRIGHT: (C)2001,JPO ...

Vibration damper with variable damping force

A vibration damper with variable damping force, including a cylinder, in which a piston with a piston rod is arranged in axially movable fashion, whereby an adjustable damping valve is activated in dependence on the deflection distance and the activation of the adjustable damping valve is carried out via a stabilizer. The vibration damper has further damping valves, whose damping effects are independent of activation by the stabilizer. The adjustable damping valve, during equilateral deflection and rebound travel of the piston rod on a vehicle axle or unilateral rebound travel, has a damping force setting that is smaller than the damping force of the further damping valves of the vibration damper.

Vibration damper with a hydraulic pressure stop

A vibration damper with a hydraulic-mechanical pressure stop includes a cylinder filled with damping medium; a piston rod movable in and out of the cylinder, a first piston fixed to the piston rod with freedom of axial movement, a second piston spaced from the first piston, a transfer spring in the second working space for moving the second piston toward the third working space in response to movement of the first piston toward the second working space; and a disk valve which allows damping medium to flow from the third working space through the second piston to the second working space as the second piston moves toward the third working space. The first piston divides the cylinder into a first and a second working space where the piston rod extends through the first working space. The second piston separates the second working space from a third working space.

Damping force device with adjustable damping force

A damping device with variable damping force, including a cylinder, in which a piston rod is arranged axially movably, and an adjustable damping valve which is activated as a function of the compression travel of an axle part. The adjustable damping valve is activated by a generator device. The generator device includes an equidirectional device which causes an equidirectional regulating variable to take effect on the adjustable damping valve independently of the compression direction.

PISTON FOR VIBRATION DAMPER

PROBLEM TO BE SOLVED: To realize a vibration damper providing an advantage with respect to comfortableness when compared with a conventional vibration damper when a high frequency is excited. SOLUTION: A second piston 13 has at least one return spring 19, 21 on both sides of it, respectively, and this piston 13 is provided so as to move in the axial direction against the return springs 19, 21 in two directions. COPYRIGHT: (C)2002,JPO ...

PISTON WITH PISTON SEGMENT FOR SEALING

SHOCK ABSORBER FOR VEHICLE SUSPENSION

Vehicle fitted with a shock absorber with variable characteristics, and shock absorber for such a vehicle.

DAMPING VALVE ASSEMBLY FOR A HYDRAULIC VIBRATION DAMPER

Piston-cylinder unit with path-dependent damping characteristics

Shock absorber for a motor vehicle, which shock absorber has a piston valve

Vibration damper, the piston valve of which is fastened to a piston rod, and which comprises a piston body with fluid passage channels which are covered by valve discs on support bodies with valve support surfaces, whereby the piston divides a cylinder tube into two work chambers by way of at least one piston ring, characterized by the fact that the piston body is realized in a disc shape, in one piece, and by way of stamping.

Vibration damping valve

The at least one annular valve disc (15) on valve support surfaces formed by raised parts of the valve body has at least one pre-opening cross-section flush with a passage (5a,5b) and covered by a backflow disc (17). The valve disc has guide segments fitting into intermediate spaces formed by the raised parts of the damping valve body. The backflow disc has tongues exerting force in the direction in which the valve disc is lifted.

Twin-tube vibration damper with a spring-loaded hydraulic compression stop

The object of the invention is to provide a hydraulic compression stop with a piston speed-dependent damping-force characteristic which can easily be configured for a required fixed stop damping. This is achieved by the provision of a compression stop valve interacting with a control spool. This compression stop valve has a valve disc which, with the control spool forms an opening which can be varied as a function of the pressure, while a throttling (choke) orifice provided with a throttle opening is arranged at an axial distance downstream of the valve disc. This throttling orifice limits the stroke of the valve disc, and the throttle opening is partially covered by the valve disc.

Vibration damper

A vibration damper includes a pressure tube in which a piston on a piston rod which can move axially is guided by means of a piston rod guide which closes the pressure tube. The piston divides the pressure tube which is filled with damping medium into two working chambers. A piston ring which covers a peripheral area of the piston has an essentially U-shaped cross section with retaining surfaces, whereby the retaining surfaces are supported on the upper and lower side of the piston. On at least one side of the piston, at least a portion of the piston on which the retaining surfaces of the piston ring are engaged has a profiled surface. The profiled surface is configured such that the distance between one side of the piston and a hypothetical reference plane which runs parallel to the piston side is alternately less than and greater than a specified size of fit.

VIBRATION DAMPER.

Amortiguador de vibraciones, que comprende un tubo a presión, en el que va conducido un émbolo unido a un vástago de émbolo axialmente móvil, por medio de una guía del vástago de émbolo, que cierra el tubo a presión, en donde el émbolo subdivide al tubo a presión relleno de medio amortiguador en dos cámaras de trabajo; con un segmento de émbolo, que cubre una superficie perimetral del émbolo y que presenta una sección transversal, prácticamente, en forma de U con unas superficies de sujeción, apoyándose las superficies de apoyo en las caras superior e Inferior del émbolo, caracterizado porque en, por lo menos, una cara del émbolo, al menos, una parte del émbolo, en la que atacan las superficies de sujeción del segmento de émbolo, presenta una superficie perfilada, de modo que la distancia entre una cara del émbolo y un plano de referencia imaginario, que discurre paralelamente a la cara del émbolo, no alcance u sobrepase, alternativamente, una medida de ajuste prevista. Figura 1.Û Vibration damper, comprising a pressure tube, in which a piston connected to an axially mobile piston rod is driven, by means of a guide of the piston rod, which closes the pressure tube, where the piston subdivides the pressure tube filled with damping medium in two working chambers; with a piston segment, which covers a perimeter surface of the piston and which has a practically U-shaped cross section with clamping surfaces, the bearing surfaces resting on the upper and lower faces of the piston, characterized in that, at least one face of the piston, at least a part of the piston, in which the clamping surfaces of the piston segment attack, has a profiled surface, so that the distance between a face of the piston and a reference plane imaginary, which runs parallel to the face of the piston, does not alternatively reach or exceed a planned adjustment measure. Figure 1.Û

Spring strut for vehicles

The invention is directed to a spring strut for motor vehicles comprising a hydropneumatic vibration damper and a supporting spring. The vibration damper has a piston rod connected with a piston and is axially guided in a piston rod guide at the end of a container. The piston rod is outwardly sealed by a piston rod seal. The piston rod guide comprises a damping valve acted upon by external forces, such as the force of the supporting spring arranged between a structural component part connected with the vehicle and a spring carrier surrounding the container of the spring strut. The spring carrier acts on the damping valve with a contact surface. The supporting spring and/or the spring carrier cooperates with at least one auxiliary device exerting a force. The auxiliary device is supported at the container by a structural component part that is fixed with respect to the container or at a vehicle part which is connected with the container.

Two-tube vibration damper with spring-loaded hydraulic pressure stop

DAMPING VALVE ASSEMBLY FOR A HYDRAULIC VIBRATION DAMPER

Selon l'invention, le piston d'un amortisseur hydraulique d'oscillations est muni d'une soupape de traction, c'est-à-dire d'une soupape destinée à amortir les mouvements vers l'extérieur de la tige de piston. Cette soupape de traction comporte deux têtes de soupape et un organe de soupape. L'organe de soupape est déplacé en position fermée et pousse les têtes de soupape contre un siège de piston. En réponse à une différence de pression prédéterminée entre les deux chambres de travail 22, 24 disposées de part et d'autre du piston 20, un passage pour l'écoulement du fluide est ouvert par soulèvement des têtes de soupape et de l'organe de soupape de la face de soupape. En dessous de la différence prédéterminée de pression, un passage préliminaire réduit est prévu pour l'écoulement du fluide. Ce passage préliminaire réduit pour écoulement du fluide traverse successivement le bord de circonférence radialement intérieur de la première tête de soupape adjacente au piston, les évidements ménagés dans le bord radialement intérieur et dans le bord radialement extérieur de la seconde tête de soupape adjacente à la première tête de soupape. According to the invention, the piston of a hydraulic vibration damper is provided with a traction valve, that is to say a valve intended to damp the outward movements of the piston rod. This pull valve has two valve heads and a valve member. The valve member is moved to the closed position and pushes the valve heads against a piston seat. In response to a predetermined pressure difference between the two working chambers 22, 24 arranged on either side of the piston 20, a passage for the flow of fluid is opened by lifting the valve heads and the valve member. valve from the valve face. Below the predetermined pressure difference, a reduced preliminary passage is provided for the fluid flow. This reduced preliminary passage for fluid flow successively passes through the radially inner ...