DE102010022237A1 - Dual coupling for coupling motor-sided input shaft with gear-sided output shafts in gear train of motor car, has coupling cover connected with central counter plate and mounted on actuation device by axial immovable axial bearing - Google Patents

Abstract

The coupling has a coupling part (22) including a coupling disk (16) that is connected with an output shaft (10) for coupling a pressure plate (15). The pressure plate is axially moved relative to a central counter plate (7), and an actuation device (11) moves the pressure plate and another pressure plate (5). A coupling cover (13) is connected with the central counter plate that is directly connected with an axially movable radial bearing (9), where the coupling cover is mounted on the actuation device by an axial immovable axial bearing (19). An independent claim is also included for a gear train of a motor car, comprising a coupling housing.

Description

The invention relates to a double clutch, with the aid of which in a motor vehicle, an engine-side input shaft with two coaxially arranged transmission-side output shafts can be coupled substantially traction interruption free.

Out EP 1 850 025 A2 is a double clutch for coupling an engine-side input shaft with two different coaxially arranged output shafts known. The dual clutch has a first clutch and a second clutch, wherein the respective clutch has a relative to the central counter plate axially movable pressure plate for coupling the respective clutch with the associated output shaft. Further, an actuating device for moving the first pressure plate and / or the second pressure plate is provided in each case by means of an actuating lever designed as a plate spring. With the central counter-plate, a clutch cover is screwed axially, which forms a pivot point for the respective operating lever. The central counter-plate is supported via a fixed bearing on the second output shaft.

There is a constant need to simplify the assembly of a dual clutch with a motor vehicle transmission and a motor vehicle engine of a motor vehicle even with possible tolerance-induced manufacturing inaccuracies of the components involved.

It is the object of the invention to simplify the assembly of the double clutch even with tolerance-related manufacturing inaccuracies of the components involved.

The object is achieved by the features of claim 1. Preferred embodiments of the invention are specified in the subclaims.

The double clutch according to the invention for coupling an engine-side input shaft with a first transmission-side output shaft and / or a second transmission-side output shaft, has a first clutch which has a relative to a central counter-plate axially movable first pressure plate for coupling a first clutch connected to the first output shaft first clutch plate. In addition, the dual clutch on a second clutch, which has a relative to the central counter-plate axially movable second pressure plate for coupling a second clutch connected to the second output shaft second clutch plate. Furthermore, an actuating device for moving the first pressure plate and / or the second pressure plate is provided. A clutch cover is connected to the central counterplate. According to the invention, the central counterplate is in particular directly connected to an axially movable radial bearing and the clutch cover is mounted on the actuating device via an axially immovable axial bearing.

By the radial bearing and the thrust bearing two different spaced-apart bearings are provided, which can remove both occurring in the double clutch loads. A swinging of the double clutch to a single bearing as the center of rotation can be avoided or at least reduced. By dividing the axial and radial fixation of the dual clutch to different camps can be easily compensated for misalignment and positional error of the input shaft relative to the output shafts, since the radial bearing and the thrust bearing do not interfere with each other in the assembly of the double clutch. About the thrust bearing, the axial positioning of the double clutch can be defined, the radial bearing due to its mobility in the axial direction can adjust its axial position substantially automatically to the position of the actuator. The radial bearing can be configured for example as a floating bearing. The thrust bearing can be formed for example by a needle bearing. The thrust bearing can also be designed as a slide bearing, for example, by the clutch cover is mounted on a particular made of plastic sleeve on the actuator. Particularly preferably, the clutch cover in the thrust bearing is pivotable and / or movable in the radial direction, so that the radial positioning of the dual clutch can be defined via the radial bearing. Alignment errors and positional errors of the motor vehicle engine relative to the motor vehicle transmission can be easily compensated. At the same time a defined stop is formed by the thrust bearing and the actuator for the remaining components of the double clutch, so that the clutch discs and the central counter-plate can be easily attached to the output shafts and automatically assume the correct axial position, whereby the assembly of the dual clutch is simplified.

The respective pressure plate can be rotatably connected via a toothing with the respective output shaft, but axially movable. However, the respective pressure plate can also be connected only to an operating pot and / or operating lever. The respective clutch disc can have, in particular on mutually path-breaking axial end faces, in each case a friction lining which can come into frictional engagement with an optionally provided friction lining of the central counterplate and / or pressure plate to close the respective clutch. The respective clutch disc can be rotatably connected via a toothing with the respective output shaft, but axially movably connected. The respective pressure plates and the central counterplate are designed in particular as separate functionally separate components, so that a so-called "three-plate design" is possible for the double clutch. The dual clutch may in particular be directly or indirectly connected to a vibration damper, in particular dual-mass flywheel and / or centrifugal force pendulum and / or mass pendulum, arranged upstream of the engine and / or on the transmission side. Furthermore, the respective clutch disc can be damped in particular by means of a dual-mass flywheel and / or centrifugal force pendulum, and / or mass pendulum. The dual clutch can in particular be connected to the input shaft via a rigid disk (drive plate) and / or a flexible and / or flexible disk (flexplate), wherein the disk can transmit torques in order to be able to introduce the torque of the input shaft into the double clutch. Due to the flexible design of the disc occurring vibrations can be completely or partially damped or eliminated.

In particular, a torsional vibration damper, in particular two-mass flywheel, rotatably but axially slidably connected to the clutch cover and / or connected to the central counter-plate. The torsional vibration damper can be easily attached to the clutch cover and / or the central counter-plate. The torsional vibration damper can already be connected to the input shaft. By manufacturing tolerances and mounting tolerances caused distance error of the input shaft to the output shafts can be easily compensated by the axial displacement. At the same time it is ensured by the rotationally fixed connection, that the torque of the input shaft can be introduced via the torsional vibration damper in the double clutch.

Preferably, the clutch cover on at least one radially outwardly facing driver, wherein the torsional vibration damper has at least one associated with the driver slot extending in the axial direction and the driver is inserted in the slot. The driver inserted into the slot forms a stop for the output side of the torsional vibration damper, so that the torque of the input shaft can be introduced via the torsional vibration damper and the clutch cover in the double clutch. The clutch cover, for example, be axially connected to the central counter-plate, in particular by screwing or riveting, so that designed to form the driver an applied to the central counter-plate substantially radially extending portion of the clutch cover in a partial area only extends beyond the radial level of the central counter-plate out needs to be. In particular, a plurality of drivers is provided, which may be inserted into a corresponding number of slots, so that there is a substantially circumferential toothing between the output side of the torsional vibration damper and the clutch cover. An unnecessarily high load of a single slot and / or a single driver in the transmission of the torque of the input shaft can be avoided. A tie rod connected to the first pressure plate, which extends radially outward on the central counter plate on the actuator to, may have openings and / or slots through which the driver can be passed radially outward without colliding with the tie rod.

Particularly preferably, the driver is formed by a bent out of the material of the clutch cover tab. The clutch cover may rest in particular radially outward on the central counterplate with a substantially axially extending part of the clutch cover and be connected in the radial direction, for example by screwing or riveting, to the central counterplate. To form the driver lugs can be defined by slots in the clutch cover, which can be bent radially outward by non-cutting forming from the voltage applied to the central counter-plate substantially axially extending portion of the clutch cover. This makes it possible to introduce the torque of the input shaft substantially centrally to the central counter-plate and / or substantially centrally to the radial bearing in the double clutch, so that act on the central counter-plate and / or the radial bearing particularly low tilting moments. The bearing load of the radial bearing can be kept low, so that the radial bearing has a correspondingly long life.

In particular, the slot is open towards the driver. The torsional vibration damper can thereby be plugged by a substantially exclusively axial movement on the clutch cover and rotatably connected in the circumferential direction with the clutch cover. Preferably, the at least one slot and / or the at least one driver on insertion bevels, which facilitate insertion of the driver in the slot and in particular allows automatic alignment in the circumferential direction of the torsional vibration damper relative to the clutch cover.

In a preferred embodiment, the torsional vibration damper is designed as a dual-mass flywheel, wherein the Dual mass flywheel has an output flange and the output flange has a substantially axially extending in particular substantially tubular extension piece, wherein the extension piece for connection to the clutch cover and / or with the central counter-plate at least partially surrounds the first clutch radially outward. Through the extension piece of the output flange, the torque of the input shaft can be introduced into the double clutch substantially over the entire circumference of the double clutch. Imbalances and uneven component loads are thereby avoided. At the same time, the output flange of the dual-mass flywheel for the double clutch can act like a cover which protects the components arranged within the dual clutch, for example against contamination.

Particularly preferably, the actuating device has a particular circumferential groove for receiving the clutch cover, wherein the groove with the clutch cover in particular forms a sliding bearing. The clutch cover, for example, have a plurality of circumferentially separated segments, which can be used from the outside radially into the groove. Further, the groove can be formed by two interconnectable components of the actuator, so that first the clutch cover is pushed in the axial direction of the actuator and then a component with a radially outwardly projecting shoulder is connected to the actuator to the actuator a groove form, in which the clutch cover is stored captive. Through the groove, the clutch cover can be mounted both in the transmission-side axial direction and in the motor-side axial direction, so that an axial mobility of the clutch cover relative to the actuating device can be minimized. The clutch cover may be used to form a sliding bearing, in particular via a plastic sleeve in the groove.

Preferably, the actuating means comprises a first annular pressure cylinder for moving the first pressure plate and a second annular pressure cylinder for moving the second pressure plate, wherein the first pressure cylinder and the second pressure cylinder are arranged coaxially with each other. The coaxial arrangement of the ring-shaped pressure cylinder results in a particularly compact and space-saving design for the actuator. Due to the compact design of the actuating device, the actuating device has a comparatively low weight, so that the weight of the actuator can be removed without difficulty.

The invention further relates to a transmission line for a motor vehicle having an engine-side input shaft, a first transmission-side output shaft, a second transmission-side output shaft and a dual clutch for coupling the input shaft to the first output shaft and / or the second output shaft, the dual clutch as described above and can be trained. Due to the double clutch results in a simplified assembly for the gear train even with tolerance-related manufacturing inaccuracies of the components involved.

In particular, the actuator is axially immovably connected to a clutch housing and / or a transmission housing. The actuator can thereby be fixed axially, so that there is a clear reference point on the axial positioning of the actuator to which the other components of the double clutch can be aligned for axial positioning. In particular, when the actuator and / or the clutch housing of the dual clutch is connected to the transmission housing, the position of the actuator substantially corresponds to the orientation and positioning of the motor vehicle transmission, which is covered by the transmission housing. Misalignment and misalignment of the dual clutch relative to the motor vehicle transmission can be reduced, so that it is sufficient to compensate for the misalignment and misalignment of the vehicle engine relative to the motor vehicle transmission via the dual clutch only.

The invention will be explained by way of example with reference to the accompanying drawings with reference to a preferred embodiment. Show it:

1 : A schematic plan view of a double clutch according to the invention and

2 a schematic sectional view of the double clutch from 1 ,

In the 1 and 2 illustrated double clutch 20 can be an engine-side input shaft 1 with an inner first output shaft 8th and / or an outer coaxial with the first output shaft 8th arranged second output shaft 10 couple. The double clutch 20 has for this purpose a first clutch 21 and a second clutch 22 on. The first clutch 21 has a relative to a central counter-plate 7 axially movable first pressure plate 5 on to one between the central counter-plate 7 and the first pressure plate 5 arranged first clutch disc 6 Frictionally coupled via friction pads. The first clutch disc 6 can have a gearing 23 rotatably but axially displaceable with the first output shaft 8th be connected. Accordingly, the second clutch 22 a relative to the central counter-plate 7 axially displaceable second pressure plate 15 on to one between the central counter-plate 7 and the second pressure plate 15 arranged second clutch disc 16 Frictionally coupled via friction pads. The second clutch disc 16 can have a gearing 23 with the second output shaft 10 rotatably but axially slidably connected. The first pressure plate 5 , the second pressure plate 15 and the central counter-plate 7 are designed as separate separate components, wherein the first pressure plate 5 and the second pressure plate 15 from different axial direction on the same central counter-plate 7 push to the respective clutch 21 . 22 close.

The central counter plate 7 is about extending in the radial direction fasteners 18 with a clutch cover 13 connected, which via a groove-shaped thrust bearing 19 with an actuating device 11 connected is. The actuating device 11 is rotatably designed and can be connected to a clutch housing, not shown, and / or a transmission housing, not shown. About the thrust bearing 19 is the double clutch 20 Positioned in the axial direction. The central counter plate 7 is about a radial bearing 9 , For example, a needle bearing or plain bearings, axially movable radially supported. Through the radial bearing 9 is the double clutch 20 positioned defined in the radial direction.

The actuating device 11 has an annular first impression cylinder 24 on, with the help of which a first piston 25 can be disengaged. The first piston 25 pivots a designed as a plate spring first actuating lever 12 to the first pressure plate 5 to close the first clutch 21 on the central counter-plate 7 with the help of a tie rod 4 to move. The tie rod 4 is about a connection piece 17 with the first operating lever 12 connected. Accordingly, the actuator 11 a coaxial with the first annular pressure cylinder 24 radially inwardly disposed annular second impression cylinder 26 on, with whose help a second piston 27 can be disengaged. The second piston 27 can be configured as a plate spring second operating lever 14 pivot to close the second clutch 22 the second pressure plate 15 on the central counter-plate 7 to move.

With the input shaft 1 is about a screw connection 2 as a torsional vibration damper a dual-mass flywheel 3 connected. The dual mass flywheel 3 has an outlet flange 3 ' on, in a radially outward direction to the first clutch 21 extending tubular extension piece 29 Transmission-side open slots 28 having. In the slots are tabs as a driver 13 ' used, made of the material of the clutch cover 13 are bent outward radially. Through the tabs 13 ' be inside the slots 28 Formed stops, so that in the transmission of the torque of the input shaft 1 through the dual mass flywheel 3 the clutch cover 13 can be taken to the torque in the double clutch 20 initiate. The slots 28 have in the axial direction an extension which is sufficient axial offset between the input shaft 1 and the output waves 8th . 10 compensate.

LIST OF REFERENCE NUMBERS

1

input shaft

2

screw

3

Dual Mass Flywheel

3 '

output flange

4

tie rods

5

first pressure plate

6

first clutch disc

7

central counter plate

8th

first output shaft

9

radial bearings

10

second output shaft

11

actuator

12

first operating lever

13

clutch cover

13 '

flap

14

second operating lever

15

second pressure plate

16

second clutch disc

17

connection piece

18

fastener

19

thrust

20

Double coupling

21

first clutch

22

second clutch

23

gearing

24

first impression cylinder

25

first piston

26

second impression cylinder

27

second piston

28

slot

29

extension

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

• EP 1850025 A2 [0002]

Claims (10)

Double clutch for coupling an engine-side input shaft ( 1 ) with a first transmission-side output shaft ( 8th ) and / or a second transmission-side output shaft ( 10 ), with a first clutch ( 21 ), which is a relative to a central counter-plate ( 7 ) axially movable first pressure plate ( 5 ) for coupling one with the first output shaft ( 8th ) connected first clutch disc ( 6 ), a second clutch ( 22 ), which is a relative to the central counter-plate ( 7 ) axially movable second pressure plate ( 15 ) for coupling one with the second output shaft ( 10 ) connected second clutch disc ( 16 ), an actuating device ( 11 ) for moving the first pressure plate ( 5 ) and / or the second pressure plate ( 15 ), and one with the central counter-plate ( 7 ) connected clutch cover ( 13 ), wherein the central counter-plate ( 7 ), in particular directly, with an axially movable radial bearing ( 9 ) and the clutch cover ( 13 ) via an axially immovable axial bearing ( 19 ) on the actuating device ( 11 ) is stored. Double clutch according to claim 1, characterized in that a torsional vibration damper, in particular two-mass flywheel ( 3 ), non-rotatably but axially displaceable with the clutch cover ( 13 ) and / or with the central counterplate ( 7 ) connected is. Double clutch according to claim 2, characterized in that the clutch cover ( 13 ) at least one radially outwardly facing driver ( 13 ' ), wherein the torsional vibration damper ( 3 ) at least one driver ( 13 ' ) associated in the axial direction slot ( 28 ) and the driver ( 13 ' ) in the slot ( 28 ) is used. Double clutch according to claim 3, characterized in that the driver by a from the material of the clutch cover ( 13 ) bent tab ( 13 ' ) is trained. Double clutch according to claim 3 or 4, characterized in that the slot ( 28 ) to the driver ( 13 ' ) is open. Double clutch according to one of claims 2 to 5, characterized in that the torsional vibration damper as a dual-mass flywheel ( 3 ) is configured, wherein the dual mass flywheel ( 3 ) an output flange ( 3 ' ) and the output flange ( 3 ' ) is a substantially axially extending, in particular substantially tubular extension piece ( 29 ), wherein the extension piece ( 29 ) for connection to the clutch cover ( 13 ) and / or with the central counterplate ( 7 ) at least partially the first clutch ( 21 ) surrounds radially on the outside. Double clutch according to one of claims 1 to 6, characterized in that the actuating device ( 11 ) a particular circumferential groove for receiving the clutch cover ( 13 ), wherein the groove with the clutch cover ( 13 ) in particular forms a sliding bearing. Double clutch according to one of claims 1 to 7, characterized in that the actuating device ( 11 ) a first annular pressure cylinder ( 24 ) for moving the first pressure plate ( 5 ) and a second annular pressure cylinder ( 26 ) for moving the second pressure plate ( 15 ), wherein the first impression cylinder ( 24 ) and the second impression cylinder ( 26 ) are arranged coaxially with each other. Gear train for a motor vehicle with an engine-side input shaft ( 1 ), a first transmission-side output shaft ( 8th ), a second transmission-side output shaft ( 10 ) and a double clutch ( 20 ) according to one of claims 1 to 8 for coupling the input shaft ( 1 ) with the first output shaft ( 8th ) and / or the second output shaft ( 10 ). Gear train according to claim 9, characterized in that the actuating device ( 11 ) is axially immovably connected to a clutch housing and / or a transmission housing.

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