STATOR WITH WAFER

The present invention relates to a stator assembly for a Electric motor, in particular an external rotor motor, consisting of a Stator having stator windings and a perpendicular to the motor axis to the stator arranged switching disc with conductor tracks, the winding ends the stator winding can be connected to a connection line contact and are.

A such stator assembly than Interconnection board for joining the wire ends of a stator winding from the publication EP 0,603,478 B1 known. On the run switching disc designated as Interconnection board from sheet metal-dance-hurry shaped conductor tracks, in their terminal-side unit As tab portions are formed and on the end region engine connecting cable plugged in the tangential direction of movement a socket terminals be. The external electrical contacting is therefore here by a socket contact system realized. The coil-lateral end regions the conductor tracks are formed as terminal lugs, with the Winding wire ends of the stator winding are welded or soldered.

A Termination technique in Publication DE 202 12,273 by means of cutting Clamping contacts is disclosed. There a is molded by extrusion-coating, disposed on the end face of the stator Insulating element as a component of a Interconnection arrangement for direct connection of winding wires of a stator winding with an electric line lead described, wherein in clamp technology exported Contact elements for contacting the winding wires with the connecting line are supported in said insulating element. By a male Lift guide operation of a receptacle housing on the insulating element by means of the cutting clamping action of the is Cutting Clamping contacts a direct electrical connection between the Winding Wires and the connecting lead produced.

In eP 1,126,580 is a plug connection for the electrical terminals of stator windings described. The arrangement features a switching disc as a component of a terminal unit on, the contacting between Lead wire and stator windings is effected by means of a plug connection Blade contacts and connector members. The Connecting Line is therefore directly by means of tabs with the contact elements of the Stator connected.

The said connection devices that have been achieved, but disadvantages. Thus in the in EP is 0 603,478 B1 disclosed technical teaching a specific device necessary, for the ends of the wires in a separate work step to solder to the terminal lugs or to weld.

Equally with disadvantages in the execution is to be made is from DE 202 12,273 U1. Through the direct contacting of the internal winding wires with from the outside approaching lead wire an individual interconnection is the coil windings not possible.

Even the Publication EP 1 126,580 B1 reveals little flexibility as regards the design flexibility. By the ducting a connection cable of the are to be joined on the switching disc Hard wired contacts of the stator. Also the proposed flat pin connections increase the Complexity of the product.

The present invention is based on the task to reason, a stator assembly to develop of the type described above, through which a simplification engine final assembly of manufacturing process and can be achieved.

This Task is thereby according to the invention dissolved, the winding ends of the stator windings that Cutting Clamping contacts with on the switching disc coil-lateral contact portions of the connecting strip conductors arranged.

The Use the cutting Clamping technique for contacting the coil-lateral Contact portions of the conductor tracks saves the costly manufacturing step the soldering of or welding the winding ends to terminal lugs.

In another advantageous embodiment, the stator an extruded coating of on, at the circumferentially distributed in axial direction for switching disc facing receiving pockets are integrally formed, in the contact elements of the cutting Clamping contacts insertable are, with their contact areas facing away from the switching disk the winding ends contact. By integration the cutting Clamping contacts in the plastic encapsulation of the stator, this can as far as prefabricated be that the contacts of the winding ends to the insulation piercing coupling devices available for picking off. The winding and the test the winding can be fully automated.

Zur Making contact with the insulation-displacement terminals, the switching disc expediently in its outer edge region circumferentially perforations which are disposed distributed on, into the coil-lateral Contact portions of the conductor tracks protrude radially. The Openings switching disk from the receiving pockets are placed in to the stator of the stator passes. Advantageously coil-lateral extend the Contact portions of the conductor tracks in the openings radially and are oriented on edge, so as to be axially in the the switching disc facing Contact regions of the contact elements of the cutting Clamping contacts can be inserted. This construction enables a simplified manufacturing process, in which largely preconfigured assemblies only by means of insertion and snap-in connections are joined together, the switching disk can be placed automatically. In addition to a cost advantage a significant time advantage by construction unit reduction arises due to the.

Further advantageous implementations of the invention are on the basis of a preferred, in the drawings embodiment illustrated explained in more detail. Here show:

1 a the invention stator assembly with stator bush,

2 a according to the invention switching disc with conductor tracks and cover plate,

3 the Switching disk according to 2 with inserted Conductor tracks and the cover plate and

4 a according to the invention an external rotor motor having a plug element.

1 shows 2 together, a perspective view of an the invention stator assembly 4 for a 1st The stator assembly with a stator bush 2 is an external rotor motor 8 and 6 from a stator with stator windings a switching disc 10,12 used in the conductor tracks are, see 2 , 14 closed with a cover plate and the is. Zur engine final assembly 14 is closed with the cover plate the Switching disk 6 pressed onto the wound stator 10 at the end face and then the Stator bush placed 4.

The Stator 6 is surrounded by a plastic encapsulation 16, at the circumferentially distributed in axial direction for switching disc 10 facing Receiving pockets 18 are integrally formed. In the represented Embodiment four 90° offset are about Receiving pockets 18 to detect. In the receiving pockets 18 are Contact elements 20 used, the 22 form the cutting Clamping contacts and, by its contact areas 10 facing away from the switching disk (largely by the receiving pockets concealed) 8 contact the winding ends 24 of the stator winding.

Between the receiving pockets 26 during the winding 18 serve axially integrally formed guide pin of the stator for deflecting of the winding wire and the determine geometrical arrangement of the winding. Corresponding guide pin 26 are mounted on the side facing away from the switching disk 6 of the stator 10.

2 shows the switching disc 12 and the conductor tracks 10 with Cover plate 14 in detail. The switching disk is 10 circular formed and a concentric opening 13 for receiving the facing front isolation shank of the stator 6 on. The switching disc 10 has in the design illustrated in its outer edge region four circumferentially equidistant distributed openings 28, set down on the Stator 6 is placed from the switching disc 10 Receiving pockets 18 of the stator 6 penetrated be. The receiving pockets 18 close in approximately flush with the 6 upper side facing away from the stator 10 from the switching disk.

Des Addition, the switching disk 6 facing away from the stator 10 on the Side at its outer periphery Contact chambers 29 on, the present than two chambers are formed at a plug member 34 located in the and external Cutting Clamping contacts 38 for A connecting conduit 36 connecting can be used. Between the two chambers 10 along the edge area of the switching disk is the periphery of an elongated 57 for rest arm opening Receiving a detent arm 34 pierced the plug element.

On the side facing away from the stator 10 has the switching disc 6 by Edge webs 30 demarcated conductive strip guidance 32 on, the substantially in the circumferential direction, in its end regions but usually extend radially. Again on the the stator 6 remote from Side, the switching disc 10 along the outer edge over an angular range of about 300° a Groove 40 on, the 32 conductive strip guidance serves as in sections.

In the 30 and from the groove 40 molded from the edge webs conductive strip guidance 32 can the Conductor tracks 12 are used. The conductor tracks 12 are the electrical connection between the winding ends 24 and the external terminals the connecting lead constitute 36, wherein different interconnecting possibilities, z. B. for clockwise and anti-clockwise operation can be realized, the "routing" of the conductor tracks express 12 is in a different. Preferably, the conductor tracks 12 are punched and bent parts carried out as a one-piece. The Conductor tracks 12 are with their respective end portions in the perforations 29 on edge 28, as well as in the contact chambers aligned, so that they are free from the internal Cutting Clamping contacts 22 and from the external Cutting Clamping contacts 38 in fitting in the axial direction are detected.

Zur Receiving a button-shaped temperature monitoring element 42 is in the switching disk 6 facing away from the stator 10 on the Side a further circular Chamber 44 embedded, can be closed with a lid 46 up-tie-clipable. The temperature monitoring element 42 is in the chamber 44 by conductive strip final sections, as Spring clip 43,45 formed are, laterally and on its top surface contacts.

On the side facing the stator 6 to 10, the switching disk its outer periphery in the shown embodiment, three axial supporting webs 48 on, on the outer edge of the Encasing plastic moulding 16 of the stator 6 are supported. Two this supporting webs axially opposite are the contact chambers 29 arranged, to the pressure during fitting the external cutting Clamping contacts 34 counteract 38 of the plug member.

The Switching disc 14 closed with the cover plate 10 can be. As the switching disc 10 also has the cover plate 14 a concentric receiving opening 50 for Receiving the front isolation shank of the stator 6 on. A circular segmental recess 52 in the cover plate 14 ensures that the terminal, edgewise aligned end regions of the Conductor tracks 29 for fitting 12 in the contact chambers the plug element 34 axially are accessible. Zum Latching the plug element 34, the cover plate 14 at the Edge of the arcuate Recess 58 on a radially outwardly facing bow-shaped holder 52, 60 of the plug member by a latching arm 34 (see 4 ) is engaged from behind. The cover plate 14 has at its outer edge circumferentially distributed latching arms 54,56 the rest arm openings in corresponding Switching disk 10 engage.

3 shows the switching disc 10 with inserted conductor tracks 12. By interlocking of the cover plate 10 to the switching disc 14 is produced before-configurable unit a, the in a simple way on the Stator 6 can be placed. Heat to project on the Encasing plastic moulding 16 of the stator 6 integrally formed Receiving pockets 18 by the openings 28 of the Switching disc 22 10 20 the cutting Clamping contacts The contact elements engage around. the conductor tracks aligned in the perforations 28 on end 12.

At the switching disc 22 by the cutting Clamping contacts 10 is at the stator 6 fixed in position that is, next to the electrical Connection to the winding ends 24 the cutting contacts 22 also have-Clamping the function of the mechanical retention of the switching disc 10.

4 shows the composite External rotor motor, only the plug element 34 is for resting on the. In the final assembly are pressed axially with a handle This can be realized. Between Stator 6 and 10 are recessed in the switching disk 4 stator bush Contact chambers 29 for the connecting line 36 to detect. The 34 formed on the plug element external Cutting Clamping contacts 38 engage around upon placement of the plug element 34 the edgewise aligned terminal-side end regions of the conductor tracks 12.

The Invention is not to the illustrated and described embodiments limited, but comprises also all equivalent speech in the sense of the invention. Also the invention is also so far not yet listed in the claim 1 defined element combination limited, but may be made by any other combination of certain characteristics of all individual features disclosed as a whole be defined. This means, that in principle practically every single characteristic of claim 1 or by omitted at least one at another point of the application disclosed single characteristic can be replaced. Therefore the only claim 1 is as a first formulation attempt for an invention to understand.