DE102013223653A1 - Solid lid release system, particularly for dual clutch of motor vehicle, has sleeve that is rotatably connected at one end having clutch cover of friction clutch, and is connected at its another end with lid bearing - Google Patents

Abstract

The solid lid release system (1) has a disengagement unit, which is provided with a housing (10) having an annular pressure chamber (11), where an axially movable piston (12) is provided, in which a release bearing is operatively connected. The release bearing acts on a diaphragm spring (5) of a friction clutch (2) in the axial direction with a force. A sleeve (16) is rotatably connected at one end (16.1) having a clutch cover (7) of the friction clutch. The sleeve is connected at its another end (16.2) with a lid bearing (9).

Description

The invention relates to a cover-resistant release system, in particular for a dual clutch of a motor vehicle having the features of the preamble of claim 1.

Release devices for clutches in the drive train of a motor vehicle are known in the prior art in various designs. In recent years, increasingly so-called. Concentric slave cylinder have been used in which a housing is concentrically arranged around a shaft, such as the transmission input shaft, and forms an annular pressure chamber in which an annular piston is arranged axially displaceable. The piston carries on its end remote from the pressure chamber a release bearing, which bears against the plate or lever spring of a clutch. By pressing hydraulic fluid into the pressure chamber, the piston is then moved out of the pressure chamber and actuates the plate or lever spring of the clutch. A special embodiment of the concentric slave cylinder are so-called cover-fixed release, in which the slave cylinder housing is fixed via a cover bearing axially and radially on the cover of the coupling. Since the clutch cover rotates with the clutch, this cover bearing is necessary in order to store the release housing rotatably. However, since a drag bearing is always transmitted via a rotary bearing, a torque which always has to be dissipated into a stationary component, for example the gear bell, always acts on the releaser housing during operation of the drive train. For this purpose, it is often provided in the prior art to provide in the bell housing a corresponding support element which supports the fluid line to the housing in the tangential direction with respect to the axis. The problem with this is that when an unanticipated strong drag torque occurs, the supply line can be damaged, which can lead to failure of the release system.

There is already known a device for disengaging a clutch, in particular a clutch in the drive train of a motor vehicle, which has a housing which is arranged concentrically about an axis and forms a pressure chamber in which an axially movable annular piston is arranged, and the housing via a Cover bearing is supported on a cover of the coupling with a supply line for supplying a hydraulic fluid into the pressure chamber, wherein to form an overload protection, a plate rotatably connected to the housing having a cantilever parallel to the feed line, wherein at the Kragarmende at least one holding arm is arranged to support the supply line against torque load. Disadvantage of this solution is the costly and expensive structural design. From the DE 10 2008 021 161 A1 a friction clutch is known, which is equipped with a clutch release device comprising a slave cylinder with a housing which is connected by means of a cover bearing rotatably and axially fixed to a mounting flange of the friction clutch. A guide sleeve surrounds an annular pressure chamber, in which an axially displaceable annular piston is arranged, which is axially fixedly connected to a release bearing, which acts on a radially inner portion of a plate spring in the axial direction with force. This arrangement has a very large radial extent, since both bearings, ie cover bearing and release bearing, run within a rotating sheet metal flange and is very expensive.

It is also known from a yet unpublished application, a clutch assembly for a friction clutch in a clutch release system of a motor vehicle, in which the cover bearing is axially spaced from the slave cylinder mounted towards the clutch, the clutch cover is guided between the cover bearing and the release bearing and in particular the Belleville spring between the cover bearing and the release bearing runs.

The disadvantages of this solution are that between coupling disk hub and the cover stop of the coupling space must be available. In the present application, a two-disc clutch is provided, which means that no installation space is available.

Therefore, the object of the invention is to develop a cover-resistant release system, in particular for a dual clutch of a motor vehicle, which requires a small space. Furthermore, noises, plucking or tingling on the pedal should be minimized in conjunction with manual gearboxes.

This object is achieved with the features of the first claim. Advantageous embodiments emerge from the subclaims.

The cover-resistant release system is used in particular in a motor vehicle for actuating a friction clutch of the motor vehicle by means of a releaser and comprises a housing having an annular pressure chamber in which a piston is mounted axially movable, which is operatively connected to a release bearing, which is a plate spring of the friction clutch In the axial direction is acted upon by a force and wherein a cover bearing is present, and the release system according to the invention has a disposed within the inner diameter of the housing of the disengagement sleeve, which at a first end with a Clutch cover of the friction clutch is rotatably connected and rotates with the friction clutch and is at its opposite second end to the cover bearing in conjunction. This makes it possible to rotatably support the housing of the releaser and to choose an axial bearing arrangement, wherein the cover bearing is mounted below the housing and holds a standard release over a co-rotating sleeve, which reduces the design effort and the release system is inexpensive to produce ,

The sleeve is fastened with its first end to the clutch cover, preferably on a cover stop of the clutch cover. It is possible to attach the sleeve to the coupling cover by a material connection (preferably welding or soldering) or mechanically (preferably by means of a retaining ring or other securing element).

The releaser is then mounted with its housing on the sleeve, wherein it is also possible that the housing of the releaser includes the guide sleeve.

The release consists essentially of a plastic housing, a piston, a release bearing, and a seal and a preload spring.

The bearing of the releaser on the sleeve is preferably carried out via the outer ring of the cover bearing, which is designed in the form of a diagonal or axial bearing.

For this purpose, the sleeve has at its second end via a radially outwardly facing flange on which the cover bearing is supported in the axial direction and radially centered.

The cover bearing is connected to its co-rotating inner ring with the sleeve, wherein the inner ring of the cover bearing is supported on the flange of the sleeve. The stationary (non-rotatable) outer ring is connected against rotation with the housing of the releaser.

The housing (one-piece or two-part) of the releaser is attached in the direction of the second end of the sleeve on the stationary outer ring of the cover bearing, for example via ribs secured against rotation and centered over a collar.

At its opposite end, the housing is operatively connected to a stationary outer ring of the release bearing, for example via a centering the piston towards ensuring flange plate which simultaneously forms a stop for a preload spring of the release bearing and has a stop to prevent rotation. The rotating inner ring of the release bearing is in contact via a pressure disk, for example in the form of a shim disk, with the disk spring tongues.

Thus, with the solution according to the invention, a cover-resistant release system, in particular for a double clutch of a motor vehicle, is made available which requires a small installation space due to the axial bearing arrangement of the release bearing and the cover bearing. Due to the possible rotationally fixed arrangement of the housing of the releaser, which can be realized by the use of the co-rotating sleeve, noise, plucking or tingling on the pedal can be reduced in conjunction with manual gearboxes.

The invention will be explained in more detail with reference to an embodiment.

The associated 1 shows a cover-resistant release system 1 , for a motor vehicle, for actuating a friction clutch 2 a motor vehicle, by means of a releaser 3 , which on the plate spring tongues 4 a plate spring 5 for actuating the friction clutch 2 via a release bearing 6 acts.

The friction clutch 2 is towards the releaser 3 with a clutch cover 7 Mistake.

The rotating inner ring 6.1 the release bearing 6 is over a shim-disk 8th with the plate spring tongues 4 in contact.

The non-rotating release 3 stands with the non-rotatable outer ring 6.2 the release bearing in operative connection and is at its release bearing 6 opposite end over a cover bearing 9 stored.

The releaser 3 has a housing in a known design 10 with an annular pressure chamber 11 in which a piston 12 is mounted axially movable. The piston 12 is by means of a piston seal 13 to the pressure room 11 sealed and works with his, the pressure chamber 11 opposite end (not labeled), on it rotatably mounted flange 14 on the outer ring 6.2 the release bearing 6 , The flange plate 14 also acts as a spring retaining plate for the preload spring only indicated here 15 of the releaser 3 ,

Inside the case 10 of the releaser 3 is one with the friction clutch 2 co-rotating sleeve 16 arranged at their first end 16.1 with the clutch cover 7 the friction clutch 2 and at its opposite second end 16.2 with the rotating inner ring 9.1 of the cover bearing 9 each rotatably connected. The releaser 3 is thus on the sleeve 16 over the cover bearing 9 , which is designed here as angular contact ball bearings stored.

The sleeve 16 comes with her first end 16.1 at a cover stop 7.1 the clutch cover 7 by means of a retaining ring 17 attached or alternatively by a material connection. For axial support of the cover bearing 9 has the sleeve 16 at its second end 16.2 via a radially outwardly pointing flange 18 on which the cover bearing 9 with its rotating inner ring 9.2 axially supported in the direction and radially centered.

Advantageously, two standard release bearings can be used by the solution according to the invention, one as a release bearing 6 between friction clutch 2 and releasers 3 is used and the other the cover bearing 9 forms.

The cover bearing 9 is then, as already described, with its rotating inner ring 9.1 with the co-rotating sleeve 16 and with his standing outer ring 9.2 with the housing 10 each secured against rotation.

Advantageously, the housing 10 on the standing inner ring 9.1 of the cover bearing 9 secured against rotation by ribs, not shown, and via a collar 19 centered.

It is inventively provided a bearing assembly in an axial manner, wherein the cover bearing to the second end 16.2 the sleeve 16 which is pushed inside the friction clutch 2 at the cover stop 7.1 the coupling cover 7 is attached. The sleeve 16 rotates with the friction clutch. On this sleeve 16 becomes the releaser 3 attached, and via a diagonal or thrust bearing, which the cover bearing 9 forms, stored. The release consists essentially of the housing 10 , which preferably consists of plastic, the piston 12 , a release bearing 6 , as well as a piston seal 13 and a preload spring 15 , It is irrelevant whether the housing 10 the guide sleeve 16 includes, or this is realized separately, for example via a steel part.

LIST OF REFERENCE NUMBERS

1

 release system

2

 friction clutch

3

 releaser

4

 Diaphragm spring fingers

5

 Belleville spring

6

 release bearing

6.1

Inner ring of the release bearing 6

6.2

Outer ring of the release bearing 6

7

 clutch cover

8th

 Shimscheibe

9

 cover support

9.1

Inner ring of the cover bearing 9

9.2

Outer ring of the cover bearing 9

10

 casing

11

 pressure chamber

12

 piston

13

 piston seal

14

 flange plate

15

 preload

16

 shell

16.1

first end of the sleeve 16

16.2

second end of the sleeve 16

17

 circlip

18

 flange

19

 Federation

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 102008021161 A1 [0003]

Claims (10)

Cover resistant release system ( 1 ), for a motor vehicle, in particular for actuating a friction clutch ( 2 ) of a motor vehicle, by means of a releaser ( 3 ), comprising a housing ( 10 ), which has an annular pressure chamber ( 11 ), in which a piston ( 12 ) is mounted axially movable, with a release bearing ( 16 ), which is a diaphragm spring ( 5 ) of the friction clutch ( 2 ) is acted upon in the axial direction with a force and wherein a cover bearing ( 9 ), characterized in that the release system ( 1 ) a sleeve ( 16 ), which at a first end ( 16.1 ) with a clutch cover ( 7 ) of the friction clutch ( 2 ) is rotatably connected and with the friction clutch ( 2 ) and at its opposite second end ( 16.2 ) with the cover bearing ( 9 ). Cover resistant release system ( 1 ), according to claim 1, characterized in that the sleeve ( 16 ) within the inside diameter of the housing ( 10 ) of the release ( 3 ) or in the housing ( 10 ) is integrated. Cover resistant release system ( 1 ) according to claim 1 or 2, characterized in that the sleeve ( 16 ) with a first end ( 16.1 ) on a cover stop ( 7.1 ) of the clutch cover ( 7 ) by a cohesive connection or by means of a retaining ring ( 17 ) is attached. Cover resistant release system ( 1 ) according to one of claims 1 to 3, characterized in that the release ( 3 ) on the sleeve ( 16 ) is stored. Cover resistant release system ( 1 ) according to one of claims 1 to 4, characterized in that the release ( 3 ) on the sleeve ( 16 ) is mounted on the cover bearing, which is designed as a diagonal or thrust bearing. Lid-tight release system according to one of claims 1 to 5, characterized in that the sleeve ( 16 ) at its second end via a radially outwardly facing flange ( 18 ), on which the cover bearing ( 9 ) axially supported and radially centered. Lid-tight release system according to one of claims 1 to 6, characterized in that the cover bearing ( 9 ) a rotating inner ring ( 9.1 ), which is connected to the sleeve ( 16 ) and that the cover bearing ( 9 ) a standing outer ring ( 9.2 ), which is connected to the housing ( 10 ) is secured against rotation. Lid-tight release system according to one of claims 1 to 7, characterized in that the housing ( 10 ) on the stationary inner ring ( 9.1 ) of the cover bearing ( 9 ) secured by ribs secured against ribs and by a collar ( 19 ) is centered. Lid-tight release system according to one of claims 1 to 8, characterized in that the housing ( 10 ) with a standing outer ring ( 6.2 ) of the release bearing ( 6 ) via a centering to the piston ( 12 ) ensuring flange ( 14 ) is operatively connected, which is a stop for a preload spring ( 15 ) of the release bearing ( 6 ) and has a stop as anti-rotation and that a rotating inner ring ( 6.1 ) of the release bearing ( 6 ) over a shim slice ( 8th ) with the plate spring tongues ( 4 ) is in contact. Lid-tight release system according to one of claims 1 to 9, characterized in that as a cover bearing ( 9 ) A release bearing is used.

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