KR100631231B1 - Retaining ring for fixing a release bearing in a release system - Google Patents

Abstract

The present invention relates to a release system for operating a friction clutch in a motor vehicle.

Description

Hydraulic release system for operating friction clutch for vehicle. {RETAINING RING FOR FIXING A RELEASE BEARING IN A RELEASE SYSTEM}

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1 is a longitudinal sectional view of an axial angle disc in accordance with the present invention;

FIG. 2 is a front view of the axial angle disk of FIG. 1. FIG.

FIG. 3 is an enlarged view of an area z of FIG. 1.

4 is a front view of the angle disc shown in FIG. 1 with an alternative embodiment of an elastic tang;

5 shows a hydraulic release system comprising a axial angle disc of the present invention for securing a release bearing and for a friction clutch of the prior art.

* Sign Description

1 ... angle disc 2 ... hydraulic release system

3 ... housing 4 ... drive shaft

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9 ... annular piston 10 ... grooved ring seal

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11 ... release bearing 14 ... rolling body

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17 ... shoulder 18 ... overhang

19 ... collar 20 ... collar flange

22a ... elastic tang 23 ... recess

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The present invention includes a drive shaft of a gearbox having a toothed gear connected to an internal combustion engine, comprising a housing having an elongated bore arranged concentrically with the drive shaft, and radially spaced apart from the bore and the drive shaft. Together with the sleeve, the bore forms a circular pressure chamber with an annular shape, in which the annular piston is axially guided, and at the end of the annular piston away from the pressure chamber, the annular piston is axially oriented. The release bearing is secured by an angle disc, and the angle disc surrounds the annular piston in a large diameter region of the angle disc, and a radial recess of the angle disc is provided to fix the release bearing, and a vehicle friction clutch It relates to a hydraulic release system for operating the hydraulic pressure.

Various examples of this type of release system are known. According to the release system described in document DE 44 12 928 A1, the inner bearing ring of a rotatably fixedly mounted release bearing is supported on the annular piston at its end. For the fixing function, a fixing element configured as an axial angle disc with respect to the holder cap is connected around the radially aligned bearing ring. The leaf spring inserted between the collar of the holder cap and the flange of the bearing ring securely holds the bearing ring. The angle disc is fixed by a fixing stud which snaps into the recess in the annular piston. The fixed studs formed in the angle discs have limited protrusions or stud heights by imprinting without the need to remove material, so that they are relatively slightly overlapped with the outer portion of the annular piston in the installed state. If an unfavorable error position exists between the axial angle disk and the annular piston, the connection can be loosened by improper overlap. Loose connections compromise the functionality of the entire release system and of the vehicle.

It is an object of the present invention to solve the problems of the prior art and to develop an axial angle disk or fixed component which is effectively fixed and permanently fastened to an annular piston.

This problem is solved by the features disclosed in claim 1 of the present invention. In order to position and fix the axial angle disk with respect to the annular piston, at least one elastic tank formed by the cut of the angle disk and capable of elastic deformation is constituted in the longest diameter portion of the angle disk. According to the present invention, the elastic tank bent inward in the radial direction protrudes inward in the radial direction from the inner wall of the angle disk, the elastic tank has a holding shoulder at the free end, when the angle disk is installed The fixed shoulder is automatically engaged in a keyed connection in the recess of the annular piston.

The elastic tank formed by the cutting portion forms an enlarged protrusion compared with the prior art, so that an overlapping portion is increased between the outer portion of the annular piston and the fixed shoulder in the region of the recess. Known as the assembly lateral height and the enlarged overlap compared to the prior art increases the functional reliability of the snap-fit connection and improves the fixation of the angle disc to the annular piston. Relatively strong bends are formed in the elastic tank by the cutouts, without stresses causing cracks or breakage by bending. Therefore, the assembly stability of the angle disk is increased by the elastic tank of the present invention.

The configuration of the present invention is described in claims 2 to 10 and the advantages of the configuration are described.

According to this invention, the said elastic tank is comprised by the cutting part which has a U shape. For this purpose the cut is made inside the axial angle disc, so that the parallel arms of the elastic tang are arranged towards the longitudinal axis of the angle disc. The fixed shoulder of the elastic tank faces the release bearing at the installation position. The separation distance and length of the arms directly related to the size of the elastic tank can be freely selected. For example, in order to avoid the risk of gaps and breakage, axial angle discs made of a material having a relatively small material elasticity and high strength may have relatively long arms. According to the invention for the separation of the arms, the arms are constructed depending on the diameter of the angle disk.

According to the present invention, fixed shoulders of different configurations are provided at the free ends of the elastic tanks. An inner part having a circular arc shape and coinciding with the free area of the annular piston or the groove base of the recess can be provided at the end of the elastic tank. By the above structure of the elastic tank, a wide contact surface is formed between the fixed shoulder and the annular piston. Optionally, the elastic tank does not require further processing after the elastic tank is bent in the radial direction. The end region of the elastic tank may be composed of strings.

According to the present invention, a portion of the angle disc projecting axially from the annular piston is arranged in cross section or is arranged along the circumference and has a radially inward collar or recess formed at the free end of the angle disc. As a result, an axial stop is formed as a support for the leaf spring or fastening means supported against the radial flange of the bearing ring, so that the bearing ring is force-bound at the axial angle disc and indirectly at the end of the annular piston. Supported.

According to the present invention, a plurality of elastic tanks are formed in a symmetrical structure around the circumference of the angle disk. In the installation position of the angle disc, the elastic tang fits into the recess or free area of the annular piston and the number and position of the recesses coincide with the elastic tang of the angle disc. Optionally, the elastic tank fits into the circumferential groove formed in the annular piston.

The depth s of the elastic tank, i.e., the size of the elastic tank protruding radially from the inner wall of the angle disk, is larger than half the wall thickness of the angle disk. The depth s may exceed the wall thickness in order to improve the reliability of the fit and the snap-fit function.

In order to determine the position of the cut portion, a cut portion arranged in the circumferential direction and having a U-shape is arranged in an area corresponding to 1/2 of the width of the axial portion of the angle disk surrounding the annular piston. The arm length of the cut portion is preferably larger than 1/4 of the width of the axial portion.

In order to provide a cost-effective component, the axial angle disc according to the invention is produced without removing the material, which is produced by a deep drawing process from the metal material. The production process is suitable for mass production and advantageous in terms of cost.
The invention will be described in detail with reference to the embodiments shown in the drawings.

An axial angle disc 1 according to the invention is described with reference to FIG. 5 showing the installation of the hydraulic release system 2 of the prior art. A housing 3 mounted concentrically with the drive shaft 4 is constructed in the hydraulic release system 2. A longitudinal bore 5 and a guide sleeve 6 mounted radially apart from the drive shaft 4 are fixed to the housing 3 by an annular flange 7. The pressure chamber 8, which is radially limited by the housing 3 and the guide sleeve 6, fixes the annular piston 9 and forms the seal with the groove ring seal 10. 9 is provided on the side of the pressure chamber. The annular piston 9 supports the release bearing 11 at the end away from the pressure chamber 8. The preload spring 12 between the inner bearing ring 13 of the release bearing 11 and the housing 3 so that the release bearing 11 contacts without friction with respect to the friction clutch (not shown in FIG. 5). ) Is inserted. The release bearing 11 formed of an inclined shoulder bearing has a rolling body 14 which is guided between the inner bearing ring 13 and the outer bearing ring 15 and has a ball shape. The release bearing 11 is connected on the annular piston 9 by the axial angle disk 1. An axial portion 16 constituting the stepped angle disc 1 and axially aligned surrounds the end of the annular piston 9. A shoulder 17, which is supported against the end of the annular piston 9 and extends radially, is connected with the axial portion 16.

The angle disc 1 has a projection 18 connected to the shoulder 17, the projection 18 extending axially on the annular piston 9, and at the free end of the projection 18 the projection ( 18 has a collar 19 extending radially outward. An inner bearing ring 13 of the release bearing 11 is supported on the shoulder 17 of the angle disc 1 by the ring flange 20. In order to support in a force-locked state, the leaf spring 21 is arranged on the collar 19 of the angle disc 1 on the inside and in contact with the ring flange 20 on the outside. The angle disc 1 is fixed on the annular piston 9 by the elastic tank 22a. The elastic tank 22a formed in the axial portion 16 forms a radially inwardly projecting portion and has a fixed shoulder 25 at the free end of the elastic tank 22a, and the elastic tank 22a. Is fitted in the recess 23 of the annular piston 9 in the keyed state.

Referring to FIG. 2, a total of six elastic tanks 22a arranged in a symmetrical structure at the circumferential portion are constituted in the angle disk 1. In order to form the elastic tanks 22a, the area formed by the cutting portion 24 and forming the tongue is bent inward in the radial direction. The U-shaped cutout 24 has a rolling body 14 which is constructed in the axial portion 16 of the angle disc 1 and has a ball shape. Referring to FIG. 2, the fixed shoulder 25 which connects the elastic tank 22a to the axial portion 16 has an arc-shaped portion that forms a concentric structure with an outer portion of the axial portion 16. The width k of the elastic tank 22a is smaller than the longitudinal size B of the axial portion 16.

Referring to FIG. 3, the area z of FIG. 1 is enlarged and the shape and arrangement of the elastic tank 22a is shown. The depth s of the elastic tank 22a is larger than 1/2 of the wall thickness d of the angle disc 1. A circumferentially cut portion 24 is axially spaced from the end, and the measured value b is smaller than half of the longitudinal size B of the axial portion 16. An end region with reduced wall thickness at the end of the protrusion 18 is constructed so that the plate above the collar 19 (as shown in FIG. 5) is removed without removing material from the radially inwardly facing collar 19. The spring 21 is supported.

Referring to FIG. 4, which is similar to FIG. 2, a fixed shoulder 26 formed at the free end of the elastic tank 22b forms a string. The elastic tank 22b is bent inward in the radial direction to provide the elastic tank 22b of FIG. 4 without processing such as forming work of the fixed shoulder 26.

Claims (11)

The drive shaft 4 of the gearbox with toothed gear is connected to the internal combustion engine and comprises a housing 3 having a long bore 5 arranged concentrically with the drive shaft 4, the bore 5 And the guide sleeve 6 radially spaced from the drive shaft 4, the bore 5 forms a circular pressure chamber 8 having an annular shape, within the pressure chamber 8. The annular piston 9 is guided in the axial direction, and at the end of the annular piston 9 away from the pressure chamber 8, the annular piston 9 is released by an axial angle disk 1. 11) and the release bearing 11 is fixed to the annular piston 9 in the relatively large diameter region of the annular piston 9, and to the radially concave protrusion 18 having a relatively small diameter. By which the annular piston 9 fixes the tracking of the release bearing 11 In a hydraulic release system for operating a friction friction clutch, At least one elastic tank 22a, 22b formed by the cutting portion 24 and formed in the radial direction so that the outer circumferential portion of the annular piston 9 is arranged and fixed to the axial portion 16 of the angle disk 1. Is formed in the angle disc 1, the elastic tanks 22a and 22b are bent inward in the radial direction and have fixed shoulders 25 and 26, and the fixed shoulders 25 and 26 are annular pistons 9. Hydraulic release system for operating a friction clutch for a vehicle, characterized in that the key is automatically engaged in the recess (23). The U-shaped cutout 24 is formed in the axial portion 16 of the angle disc 1, and the arms 27a and 27b of the cutout 24 configured in parallel are formed on the angle disk. A hydraulic release system for operating a vehicle friction clutch, which is arranged toward the longitudinal axis 28 of (1), wherein the fixed shoulders 25 and 26 are arranged toward the release bearing 11. 1) The hydraulic release system according to claim 1, wherein the fixed shoulder (25) formed at the free end of the elastic tank (22a) includes a circular inner portion having an arc shape. 2) 2. The hydraulic release system according to claim 1, wherein the elastic tank (22b) has a fixed shoulder (26) formed of a string portion (Fig. 4). 2. A holding device as claimed in claim 1, which retains the support means for retaining the radially flanged flanges (20) constituting a rotationally fixed inner bearing ring (13) coupled to the axial angle disc (1) in a force-restricted state. For this purpose, the friction clutch for the vehicle is characterized in that the projection 18 of the angle disc 1 projecting axially on the annular piston 9 comprises a collar 19 facing radially outward at the end of the projection. Hydraulic release system to make. (Fig. 5) 2. Hydraulic release system according to claim 1, characterized in that the angle disc (1) comprises elastic tanks (22a, 22b) arranged symmetrically. 2. Hydraulic release system according to claim 1, characterized in that the elastic tanks (22a, 22b) are constrained to the circumferential groove of the annular piston (9). 2. The vehicle friction clutch according to claim 1, wherein recesses (23) in which the number and arrangement of the elastic tanks (22a, 22b) formed in the angle disk (1) match are provided in the annular piston (9). Hydraulic release system to operate. The hydraulic release for operating a friction clutch for a vehicle according to claim 1, wherein the depth s of the elastic tank 22a has a size equal to or greater than half the wall thickness of the angle disk 1. system. The constituent region of the cutout portion 24 of the elastic tanks 22a and 22b formed in the circumferential direction is arranged in an area that is 1/2 of the width of the axial portion 16 of the angle disc 1. Hydraulic release system for operating a friction clutch for a vehicle, characterized in that. 2. Hydraulic release system according to claim 1, characterized in that the angle disc (1) is manufactured without removing material from the metal strip material.

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