DE102015210301A1 - Coupling arrangement for a motor vehicle - Google Patents

Abstract

The invention relates to a clutch arrangement (10) for a motor vehicle, comprising - a first plate carrier (20) on which a set of first plates (22) is arranged rotationally fixed and axially displaceable, - a coaxial with the first plate carrier (20) and radially adjacent to this, relative to it rotatably arranged second plate carrier (16) on which axially alternately with the first blades (20) a set of second blades (18) rotatably and axially displaceably arranged, and - a set of support springs (12), the axially directed recesses (121, 122), by means of which they are at least tangentially positively connected to one of the first blades (22) and these spring-loaded against each other in the separating direction. The invention is characterized in that the support springs are formed as annular disc-shaped corrugated springs (12) and with their recesses (121, 122) on axial projections (221, 227, 228) of their respective associated first slats (22) are plugged.

Description

• – einen ersten Lamellenträger, auf dem ein Satz erster Lamellen drehfest und axial verschieblich angeordnet ist,
• – einen koaxial zu dem ersten Lamellenträger und radial benachbart zu diesem, relativ zu ihm drehbar angeordneten zweiten Lamellenträger, auf dem axial abwechselnd mit den ersten Lamellen ein Satz zweiter Lamellen drehfest und axial verschieblich angeordnet ist, und
• – einen Satz Abstützfedern, die axial gerichtete Ausnehmungen aufweisen, mittels derer sie wenigstens tangential formschlüssig mit jeweils einer der ersten Lamellen verbunden sind und diese gegeneinander in Trennrichtung federbeaufschlagen.

The invention relates to a clutch assembly for a motor vehicle, comprising

• A first plate carrier on which a set of first plates is arranged rotationally fixed and axially displaceable,
• A coaxial with the first plate carrier and radially adjacent thereto, rotatably arranged relative to it second plate carrier on which axially alternately with the first plates a set of second plates rotatably and axially displaceably arranged, and
• - A set of support springs, which have axially directed recesses, by means of which they are at least tangentially positively connected to one of the first fins and these spring against each other in the separation direction.

State of the art

Such coupling arrangements are known from the DE 10 2012 214 590 A1 ,

Coupling arrangement of the type of multi-plate clutch are well known in the art and are widely used in motor vehicle application. A typical multi-plate clutch is in the DE 10 2009 057 353 A1 disclosed. The core of such a multi-plate clutch is a disk set of annular disc-shaped, alternately arranged inner and outer disks, the inner disks are rotatably and axially displaceably arranged on a radially inner inner disk carrier, while the outer disks are rotatably and axially displaceably arranged on a radially outer outer disk carrier. For storage of the slats on their respective carriers the latter are pot-shaped with a toothed pot wall and the slats have at their radially inner (inner slats) and radially outer (outer slats) edge on a corresponding toothing. As a result, the blades are taken rotatably upon rotation of their respective carrier, but are axially displaceable. To actuate such a coupling arrangement, an actuating piston is provided, which exerts an axial compressive force on the disk set, whereby the inner disks come into frictional contact with the outer disks, so that a torque can be transmitted between the inner disk carrier and the outer disk carrier. In order to ensure a separation of the slats after release of the actuation pressure and thus a release of the torque transfer, support springs are arranged between the slats of at least one set of plates, which are formed in the embodiment of said document as annular corrugated springs. They are in particular arranged between each two outer disks and dimensioned such that they separate the outer disks axially so far from each other without external application of force by the actuating piston, that the inner disks can rotate therebetween without frictional contact with the outer disks. The corrugated springs must be rotatably coupled with the associated disk carrier (the outer disk carrier in the prior art embodiment). For this they have at their edge over one or a few notches, in which engages an extended tooth of the pot wall of the outer disk carrier. This is disadvantageous because notch and tooth extension typically do not form an ideal positive fit, so that the axial movement leads to abrasion in particular on the outer disc carrier material.

From the above-mentioned, generic document, it is known to use instead of corrugated springs individual spring segments, which are individually riveted with associated slats. The multiple riveting of the spring segments with the associated slats is technically very complicated assembly and therefore expensive.

task

It is the object of the present invention to improve a generic clutch assembly such that the assembly cost is reduced.

Presentation of the invention

This object is achieved in conjunction with the features of the preamble of claim 1, characterized in that the Abstützfedern are designed as annular disk-shaped corrugated springs and are plugged with their recesses on axial projections of their respective associated first slats.

This invention combines the advantages of the above-described prior art clutch designs while avoiding their respective disadvantages. Basically, the idea is taken to make the Abstützfedern as annular disk-shaped corrugated springs. However, these are not performed in the toothing of the outer disk carrier, but indirectly rotatably coupled via their respective associated first blades with these. However, apart from the known, montage-consuming riveting. Rather, the inventors have recognized that between corrugated spring and first blade only in tangential direction directed positive connection is required. In particular in the axial direction no positive connection is required. In the final assembled state, the plate pack pretensioned outwards from the corrugated springs is in fact supported against a rigid end plate and the actuating piston so that falling apart is not to be feared. An axial fixation of the corrugated springs the fins is therefore not required. Their omission according to the invention, however, has the great advantage that during assembly the individual elements only have to be stacked on one another in the correct angular orientation and, in particular, no time-consuming riveting operations are required.

In a preferred embodiment, it is even provided that the recesses with respect to the projections have a radial excess. This simplifies the assembly, since so find projections and recesses easier to each other. In the case of several projections per lamella or recesses per wave spring, however, a radial centering is nevertheless achieved.

Preferably, the projections are integrally connected to their respective first lamella. Alternatively, it is of course also possible to design the projections as a separate component, for example. In the form of pressed-in, screwed or cohesively connected bolts.

Regardless of the type of connection (or one-piece), the shape of the projections may vary. In a first embodiment it is provided that the projections are formed as protruding from the slats of their respective first lamella bolts. This represents a particularly simple and inexpensive variant.

Alternatively, however, the projections can also be arranged in each case at the free end of a spring finger extending in the lamellar plane of its respective first lamella. This spring finger is preferably extended in the tangential direction of the respective first lamella. This facilitates the assembly. For example, lamella and corrugated spring can be placed on each other at any angle and then be rotated relative to each other. Once the correct angle of rotation is reached, the projections, driven by the spring fingers, engage in the recesses.

As is basically known from the prior art, the first lamellae are preferably designed as outer lamellae. These are commonly used as lining fins, i. Metal plates with a friction lining, designed.

Further features and advantages of the invention will become apparent from the following specific description and the drawings.

Brief description of the drawings

Show it:

1 : an inventively designed double clutch arrangement in sectional and enlarged detail representation,

2 : A partial plan view of a lamellar / wave spring connection of the dual clutch assembly of 1 .

3 : a schematic representation of a first variant of a laminar / wave spring connection according to the invention,

4 : A schematic representation of a second variant of a lamellar / wave spring connection according to the invention and

5 : A schematic representation of a third variant of a lamellar / wave spring connection according to the invention.

Detailed description of preferred embodiments

Like reference numerals in the figures indicate like or analogous elements.

1 shows, without limitation of generality, a dual clutch arrangement 10 with according to the invention rotationally secured corrugated springs 12 , In the embodiment shown, the dual clutch assembly as shown in the overview below in FIG 1 shown, two axially adjacent multi-plate clutches 14 . 14a of which, for reasons of clarity, only the left multi-plate clutch 14 is provided with reference numerals. The multi-plate clutch 14 includes an inner disc carrier 16 on which a set of disc-shaped inner disks 18 rotatably and axially displaceable. As in 2 clearly recognizable, this rotational fixation takes place while maintaining an axial degree of freedom by an internal toothing of the inner plates 18 , which with a corresponding external toothing of the inner disk carrier 16 interacts.

Next comprises the multi-plate clutch 14 an outer disc carrier 20 on which a set of outer plates 22 is rotatably mounted and axially displaceable. As in particular in 2 clearly recognizable, this rotational fixation is done while maintaining an axial degree of freedom by external teeth of the outer plates 22 , which with a corresponding internal toothing of the outer disk carrier 20 interacts.

As usual with such multi-plate clutches and in the overview of 1 recognizable, are the inner fins 18 with the outer plates 22 arranged nested, ie axially alternately positioned so that a Compressing the disk pack by means of an actuating piston 24 to a common axial displacement of the inner plates 18 and the outer lamellae 22 against a final lamella 26 and to an approximation of each inner plate 18 with her on both sides adjacent outer plates 22 and leads to the formation of a frictional contact, so that a torque between the inner disk carrier and the outer disk carrier 20 can be transferred. To ensure a release of the clutch after the end of the pressurization, are between the outer plates 22 the already mentioned corrugated springs 12 arranged. These are also formed annular disc-shaped and, as in particular in the detailed representation above in 1 recognizable, on the outer plates 22 rotating fixed. In the illustrated embodiment, this is by means of punctures 221 in the outer plates 22 and corresponding breakthroughs 121 in the corrugated springs 12 realized. Easily recognizable in the detailed representation above in 1 is the "mountain-on-mountain" arrangement of corrugated springs 12 ie that of an outer fin 22 bilateral corrugated springs 12 the outer lamella 22 contact in each case the same angle ranges, so that the on the outer plate 22 acting axial forces cancel each other, so no bending of the outer plate 22 is to be feared.

As also in the detail above in 1 recognizable, in the embodiment shown are the outer plates 22 designed as so-called lining lamellae, which is a typically metallic lining carrier 222 and on these glued friction linings 223 exhibit. The inner disks 18 In contrast, in the embodiment shown are formed as pure steel plates.

The throats 221 and the corresponding breakthroughs 121 are in 2 again shown in plan view. It can be seen that in the embodiment shown, both the settings 221 as well as the breakthroughs 121 are circular, so that the corrugated spring 12 is fixed at each of its fixation points in both the tangential and in the radial direction. Alternatively, it is also possible the breakthroughs 121 To make with radial oversize, so that each fixation point only ensures a tangential positive rotation lock, several fixation points together but also for the radial fixation, ie in particular the centering of the corrugated spring 12 relative to the outer lamella carrying it 22 guarantee. Such a radial oversize can be done, for example, by forming a slot, a rectangular or wedge-shaped cutout or in some other way.

The 3 to 5 show some other possible embodiments of the rotational fixation of corrugated springs 12 on outer plates 22 , wherein the variants shown are purely illustrative and not restrictive.

In the embodiment of 3 is also an enforcement 221 in the outer lamella 22 provided, whereas the corrugated spring 12 no breakthrough, but rather a blind hole 122 as to the enforcement 221 having corresponding element.

In the embodiment of 4 has the outer lamella 22 a tangentially oriented slot 225 on in a likewise tangentially oriented spring fingers 226 protrudes, at its free end an axial projection 227 is arranged. The wave spring 12 has a corresponding breakthrough 121 on, which could of course be designed as a blind hole.

In the embodiment of 5 Finally, the outer lamella points 22 a one-piece or cohesively formed with her, axially projecting bolt 228 on that in a breakthrough 121 the wave spring 12 protrudes.

Of course, the embodiments discussed in the specific description and shown in the figures represent only illustrative embodiments of the present invention. In the light of the disclosure herein, those skilled in the art will be offered a wide range of possible variations. In particular, the person skilled in the art will also be able to use other corresponding forms of the positive rotational fixation for implementing the present invention. Likewise, the person skilled in the art will recognize that the wave springs can in principle also be coupled to the inner disks and that, with regard to the disk / wave spring connection, a kinematic reversal can also be considered.

LIST OF REFERENCE NUMBERS

10

Dual clutch assembly

12

Well spring

121

Breakthrough in 12

122

Blind hole in 12

14

multi-plate clutch

14 '

multi-plate clutch

16

Inner disk carrier

18

inner plate

20

External disk carrier

22

outer plate

221

Puncture in 22

222

Beluksträger of 22

223

Friction lining of 22

225

tangential slot in 22

226

spring fingers

227

axial projection on 226

228

Bolt on 22

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102012214590 A1 [0002]
• DE 102009057353 A1 [0003]

Claims (8)

Coupling arrangement ( 10 ) for a motor vehicle, comprising - a first plate carrier ( 20 ) on which a set of first fins ( 22 ) is arranged rotationally fixed and axially displaceable, - a coaxial with the first plate carrier ( 20 ) and radially adjacent to this, relative to it rotatably arranged second plate carrier ( 16 ), on the axially alternating with the first lamellae ( 20 ) a set of second blades ( 18 ) is arranged rotationally fixed and axially displaceable, and - a set of support springs ( 12 ), the axially directed recesses ( 121 . 122 ), by means of which they at least tangentially form-fitting with one of the first blades ( 22 ) are connected and these spring against each other in the separation direction, characterized in that the support springs as annular disc-shaped corrugated springs ( 12 ) are formed and with their recesses ( 121 . 122 ) on axial projections ( 221 . 227 . 228 ) of their respective associated first fins ( 22 ) are plugged. Coupling arrangement ( 10 ) according to claim 1, characterized in that the recesses ( 121 . 122 ) opposite the projections ( 221 . 227 . 228 ) have a radial excess. Coupling arrangement ( 10 ) according to one of the preceding claims, characterized in that the projections ( 221 . 227 . 228 ) in one piece with its respective first lamella ( 22 ) are connected. Coupling arrangement ( 10 ) according to one of the preceding claims, characterized in that the projections as from the lamellar plane of their respective first lamella ( 22 ) projecting bolts ( 228 ) are formed. Coupling arrangement ( 10 ) according to one of claims 1 to 3, characterized in that the projections ( 227 ) each at the free end of one in the lamellar plane of their respective first lamella ( 22 ) extended spring fingers ( 226 ) are arranged. Coupling arrangement ( 10 ) according to claim 6, characterized in that the spring finger ( 226 ) in the tangential direction of the respective first lamella ( 22 ). Coupling arrangement ( 10 ) according to one of the preceding claims, characterized in that the first lamellae are designed as outer lamellae ( 22 ) are formed. Coupling arrangement ( 10 ) according to one of the preceding claims, characterized in that the first lamellae ( 22 ) are formed as lining lamellae.

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