Coupling having a pressure ring with bayonet lock

Abstract

Clutch (1) for a drive train of a motor vehicle (2), comprising at least one outer disk carrier (3, 22) with at least one outer disk (4, 23) and at least one inner disk carrier (5, 24) with at least one inner disk (6, 25), wherein the at least one outer disk carrier (3, 22) has a groove (7) into which a pressure ring (8) for supporting an actuating force can be fastened with a bayonet catch (9), wherein the bayonet catch (9) has an anti-twist device (10), wherein the anti-twist device (10) is designed as an embossing (17) in the pressure ring (8).

Description

[0001] The present invention relates to a clutch for a drive train of a motor vehicle, with the aid of which a torque transmission from an internal combustion engine to a transmission can be interrupted as required.

[0002] Clutches, in particular wet dual clutches, are known from the prior art, comprising at least one outer disk carrier with at least one outer disk and at least one inner disk carrier with at least one inner disk. Such clutches are engaged by pressing the at least one inner disk onto the at least one outer disk using an actuating force to create a frictional connection between the at least one inner disk and the at least one outer disk. The actuating force is typically provided by a piston that bears against the clutch. Supporting the piston sometimes requires a large amount of space and is complex to assemble.

[0003] As state of the art, reference is made, for example, to JP 369 666 4 B2 and DE 10 2007 027 120 A1.

[0004] The object of the invention is therefore to at least partially solve the problems described with reference to the prior art and, in particular, to provide a clutch for a drive train of a motor vehicle that enables support of an actuating force in a space-saving manner and with minimal assembly effort. Furthermore, a motor vehicle is also to be provided whose clutch enables support of an actuating force in a space-saving manner and with minimal assembly effort.

[0005] These objects are achieved with a device according to the features of the independent patent claims. Further advantageous embodiments of the invention are specified in the dependent patent claims. It should be noted that the features listed individually in the dependent patent claims can be combined with one another in any technologically expedient manner and define further embodiments of the invention. Furthermore, the features specified in the patent claims are further specified and explained in the description, with further preferred embodiments of the invention being presented.

[0006] The clutch according to the invention for a drive train of a motor vehicle has at least one outer disk carrier with at least one outer disk and at least one inner disk carrier with at least one inner disk, wherein the at least one outer disk carrier has a groove into which a pressure ring for supporting an actuating force can be fastened with a bayonet lock.

[0007] Vehicle drive engines usually have a minimum speed (idling speed). To start off from a stationary vehicle, a speed gap between the lowest engine operating speed and a stationary transmission input shaft must be closed by a clutch. The clutch also serves to interrupt the transmission of torque from the flywheel of the drive engine to the transmission during gear changes. The clutch proposed here is, in particular, a wet clutch or wet dual clutch. Wet-running means that (transmission) oil can flow through a clutch housing, so that energy introduced into the clutch by frictional work can be dissipated through the (transmission) oil.Dual clutches are two independently operated clutches, each operating one of two autonomous sub-transmissions of a dual-clutch transmission, thus enabling gearshifts without interruption of traction. The clutch is preferably used in passenger cars or trucks.

[0008] The clutch further comprises at least one outer disk carrier with at least one outer disk and at least one inner disk carrier with at least one inner disk. The at least one outer disk carrier is preferably connected to an input hub for the internal combustion engine. The at least one inner disk carrier is preferably connected to a transmission input shaft. The clutch can be actuated by an actuating force by which the at least one inner disk and the at least one outer disk can be pressed against one another in an axial direction, such that a force-locking connection can be established between the at least one inner disk and the at least one outer disk. A torque can be transmitted from the drive motor to the transmission via this force-locking connection. The actuating force is applied by an actuating force generator, for example a piston, which is supported against the clutch.The support is therefore in particular a bearing for the actuating force generator. The at least one outer disk carrier has a groove into which a thrust ring for supporting an actuating force can be fastened with a bayonet lock. The thrust ring is an annular component made of metal, in particular of flat steel. The thrust ring has a thickness of preferably 2 mm - 20 mm (millimeters) in an axial direction and a diameter of 100 mm - 400 mm (millimeters). Furthermore, the thrust ring has a circumferential surface in a radial direction, which is preferably provided with external teeth. The outer disk carrier is in particular an at least partially wooden cylindrical component with an inner surface, wherein the inner surface is preferably designed with internal teeth.The bayonet lock is a detachable mechanical connection between the thrust ring and the at least one outer disk carrier. For this purpose, the thrust ring and the at least one outer disk carrier are inserted into one another and connected by counter-rotating. During rotation, a circumferential surface of the thrust ring engages in the groove of the at least one outer disk carrier, so that the thrust ring and the at least one outer disk carrier are positively connected to one another in the axial direction. The thrust ring serves to support the actuating force and is characterized by its particularly small bulk requirement and ease of assembly.

[0009] According to the invention, the bayonet lock has an anti-rotation device. The anti-rotation device prevents the thrust ring from becoming detached from the at least one outer disk carrier due to independent rotation. Furthermore, the anti-rotation device prevents the thrust ring from contacting other moving components in the clutch, which would lead to friction and thus to hysteresis in a clutch characteristic curve. In particular, the bayonet lock can have a plurality of anti-rotation devices, which are preferably evenly distributed in a circumferential direction of the thrust ring and / or the at least one outer disk carrier.

[0010] The anti-rotation device is preferably designed as a rivet. The rivet preferably extends in an axial direction through the thrust ring and the at least one outer disk carrier or another component that is rotationally fixedly connected to the at least one outer disk carrier.

[0011] Furthermore, it is advantageous if the anti-rotation device is designed as a securing element between a peripheral surface of the pressure ring and an inner surface of the at least one outer disk carrier. The securing element is, in particular, a metal piece that is inserted into a recess between the peripheral surface of the pressure ring and the inner surface of the at least one outer disk carrier when the bayonet lock is closed. The securing element blocks rotational movement of the pressure ring in the at least one outer disk carrier.

[0012] It is also advantageous if the securing element is designed as a clamp. A clamp here is a hollow cylindrical component that is preferably slotted along its length. The clamp is preferably pressed into the recess and is thus arranged in a self-locking manner within the recess.

[0013] It is according to the invention if the anti-twist device is designed as an embossing in the pressure ring. The embossing is in particular a projection that protrudes from the pressure ring in the axial direction. Furthermore, the embossing can be a deformation of the pressure ring, which is preferably produced by a forming tool with pressure on a surface of the pressure ring. If the anti-twist device is designed as an embossing, the groove in the at least one outer disk carrier preferably has a width in the axial direction that corresponds at least to the thickness of the pressure ring plus a height of the embossing. The height of the embossing is in particular a length by which the embossing protrudes from the surface of the pressure ring in the axial direction.The securing of the pressure ring in the at least one outer disk carrier is preferably carried out by an axial adjustment of the pressure ring in the at least one outer disk carrier, whereby the embossing in a circumferential direction of the pressure ring is blocked against rotation by the internal toothing of the at least one outer disk carrier.

[0014] According to a further aspect of the invention, a motor vehicle with a drive motor and a clutch according to the invention is also proposed.

[0015] The invention and the technical environment are explained in more detail below with reference to the figures. It should be noted that the figures show particularly preferred embodiments of the invention, but the invention is not limited thereto. Identical components in the figures are provided with the same reference numerals. They schematically show: Fig. 1: a motor vehicle with a clutch; Fig. 2: a clutch; Fig. 3: a first example of an outer disk carrier and a thrust ring; Fig. 4: a detailed view of the outer disk carrier and the thrust ring according to the Fig. 3; Fig. 5: a second example of an outer disk carrier and a thrust ring; Fig. 6: a detailed view of the outer disk carrier and the thrust ring according to the Fig. 5; Fig. 7: a third example of an outer disk carrier and a thrust ring; Fig. 8: a detailed view of the outer disk carrier and the thrust ring according to the Fig. 7; Fig. 9: a fourth example of an outer disk carrier and a thrust ring; Fig. 10: a fifth example of an outer disk carrier and a thrust ring; Fig. 11: a sixth example of a pressure ring; Fig. 12: the sixth example of the pressure ring according to the Fig. 11 with a sixth example of an outer disk carrier in a first detailed view; Fig. 13: the sixth example of the outer disk carrier and the thrust ring in a second detailed view; and Fig. 14: the sixth example of the outer disk carrier and the thrust ring in a third detailed view.

[0016] The Fig. 1 shows a motor vehicle 2 with a drive motor 18, a clutch 1 and a transmission 19. In the Fig. 2 shows a sectional view of the coupling 1 of the Fig. 1. The clutch 1 shown here is a wet-running dual clutch. The clutch 1 has a housing 32 in which a first partial clutch 20 and a second partial clutch 21 are arranged. The first partial clutch 20 has a first outer disk carrier 3 with a plurality of outer disks 4 and a first inner disk carrier 5 with a plurality of first inner disks 6. The second partial clutch 21 has a second outer disk carrier 22 with a plurality of second outer disks 23 and a second inner disk carrier 24 with a plurality of second inner disks 25. The following figures show several examples of the second outer disk carrier 22. It should be clarified at this point that the following examples of the second outer disk carrier 22 can easily be transferred to the first outer disk carrier 3.

[0017] The Fig. 3 shows a first example of the second outer disk carrier 22 which has an internal toothing 30 on an inner surface 14. Furthermore, the Fig. 3 a thrust ring 8 with a circumferential surface 13 with an external toothing 29. The thrust ring 8 was inserted in an axial direction 33 into the second outer disk carrier 22 and rotated relative to the second outer disk carrier 22 at the level of a groove 7 in the internal toothing 13, so that the external toothing 29 engages in the groove 7 of the internal toothing 30. The external toothing 29 and the internal toothing 30 with the groove 7 therefore form a bayonet lock 9. The thrust ring 8 is secured in the second outer disk carrier 22 by the bayonet lock 9 in the axial direction 33 by a positive fit. Fig. 4 shows a detailed view of the pressure ring 8 in the groove 7 of the second outer disk carrier 22 according to the Fig. 3.

[0018] The Fig. Figure 5 shows a second example of the second outer disk carrier 22, wherein the thrust ring 8 is connected to the second outer disk carrier 22 by the bayonet lock 9. The bayonet lock 9 has an anti-twist device 10, which in this example is formed by a rivet 11. The rivet 11 extends in the axial direction 33 through the thrust ring 8 and a retaining ring 26 that is connected to the second outer disk carrier 22 in a rotationally fixed manner. Fig. 6 shows a detailed view of the second example in a sectional view, wherein in particular the rivet 11 in the pressure ring 8 and the retaining ring 26 can be seen.

[0019] The Fig. Figure 7 shows a third example of the second outer disk carrier 22, wherein the pressure ring 8 is connected to the second outer disk carrier 22 by the bayonet lock 9. In the second example, the anti-rotation device 10 is designed as a securing element 12, wherein the securing element 12 is inserted into a recess 27 between the inner surface 14 of the second outer disk carrier 22 and the circumferential surface 13 of the pressure ring 8. Fig. 8 shows the third example in a detailed view, wherein it can be seen particularly clearly that the securing element 12 is arranged in the recess 27 between the inner surface 14 of the second outer disk carrier 22 and the peripheral surface 13 of the pressure ring 8.

[0020] The Fig. 9 shows a fourth example in which the securing element 12 is designed as a clamp 15.

[0021] The Fig. Figure 10 shows a fifth example, in which the securing element 12 in the form of the clip 15 is secured by a pin 16. For this purpose, the pressure ring 8 has an opening 28 that extends into the recess 27.

[0022] The Fig. 11 shows a sixth example of the pressure ring 8, wherein the pressure ring 8 has an embossing 17 in the area of ​​the circumferential surface 13. The Fig. 12 shows a sectional view through the thrust ring 8 in the area of ​​the embossing 17. In the position of the thrust ring 8 shown here, the thrust ring 8 is screwed into the groove 7 of the second outer disk carrier 22, but is not yet secured against rotation. Fig. 13 shows a further sectional view through the pressure ring 8 in the area of ​​the embossing 17. In the Fig. In the position shown in Figure 13, the thrust ring 8 is adjusted in the axial direction 33, so that a projection 31 of the embossing 17 is at least partially aligned in a circumferential direction of the thrust ring 8 with the internal toothing 30 of the second outer disk carrier 22. As a result, the thrust ring 8 is secured against rotation relative to the second outer disk carrier 22. The same position as in the Fig. 13 will be repeated in the Fig. 14 shown in a perspective view.

[0023] The proposed coupling enables the support of an actuating force in a space-saving manner and with minimal installation effort. List of reference symbols 1 clutch 2 motor vehicles 3 first outer disc carriers 4 first outer slat 5 first inner disc carrier 6 first inner lamella 7 grooves 8 Pressure ring 9 Bayonet lock 10 Anti-twist device 11 rivet 12 Securing element 13 Circumferential surface 14 inner surface 15 brackets 16 pin 17 Embossing 18 Drive motor 19 gearboxes 20 first partial coupling 21 second partial coupling 22 second outer disc carrier 23 second outer lamella 24 second inner disc carrier 25 second inner lamella 26 Retaining ring 27 recesses 28 Opening 29 External gearing 30 internal gearing 31 overhang 32 housings 33 axial direction

Claims

[1] Clutch (1) for a drive train of a motor vehicle (2), comprising at least one outer disk carrier (3, 22) with at least one outer disk (4, 23) and at least one inner disk carrier (5, 24) with at least one inner disk (6, 25), wherein the at least one outer disk carrier (3, 22) has a groove (7) into which a pressure ring (8) for supporting an actuating force can be fastened with a bayonet catch (9), wherein the bayonet catch (9) has an anti-twist device (10), wherein the anti-twist device (10) is designed as an embossing (17) in the pressure ring (8). [2] Motor vehicle (2) comprising a drive motor (18) and a clutch (1) according to claim 1.

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