DE102018116135A1 - Release device with openings for retaining ring - Google Patents

Abstract

The invention relates to a release device (1) for a drive train of a motor vehicle, with a hydraulic slave cylinder and a release bearing (2) with at least one bearing ring (3), the release bearing (2) having a retaining ring (4) which is attached to a piston ( 5) of the hydraulic slave cylinder is at least axially fixed, the retaining ring (4) engaging the bearing ring (3) in a force-transmitting manner, the bearing ring (3) having at least one through opening (6) through which the retaining ring (4) engages.

Description

The present invention relates to a release device for a drive train of a motor vehicle for actuating a clutch or a brake, with a hydraulic slave cylinder and a release bearing with at least one bearing ring, the release bearing having a retaining ring which is attached to a piston of the hydraulic slave cylinder at least axially fixed, wherein the retaining ring acts force-transmitting on the bearing ring.

In the currently known release systems, the release bearing and the slave cylinder piston are connected to one another via a first component, for example a retaining ring, and centered to one another via a second, separate component, for example a spring. For example, the DE 10 2016 220 457 A1 an actuator for actuating a vehicle clutch with a clamped spring retaining ring. The actuator has a slave piston which is mounted so as to be movable relative to a slave cylinder and which is prepared for axially displacing a release bearing. The release bearing can be preloaded in the axial direction by means of a preload spring which can be positioned between a spring retaining ring on the release bearing side and a housing section fixed to the slave cylinder, the spring retaining ring being clamped between a component which is fixed to the slave piston and the release bearing.

The use of two components to position the release bearing and the slave cylinder piston relative to each other increases the number of components and increases the installation space required. Furthermore, the assembly becomes more complex, which increases the risk of incorrect assembly.

The object of the invention is to avoid or at least alleviate the disadvantages of the prior art and in particular to reduce the number of components and to simplify assembly.

The object of the invention is achieved in a generic device in that the bearing ring has at least one through opening through which the retaining ring engages.

As a result, the release bearing and the piston can advantageously be positioned and centered only with respect to one another, namely the retaining ring. The number of parts can thus be reduced and the installation space saved.

Advantageous embodiments are claimed in the subclaims and are explained below.

So it is advantageous if the retaining ring passes through an inner or outer bearing ring. Which bearing ring is penetrated by the retaining ring depends on the arrangement or structure of the release device.

It is advantageous if the retaining ring is designed and arranged so that it serves to center the release bearing. In addition to its holding function, the retaining ring also serves to center the release bearing with respect to the piston.

For the connection of the retaining ring to the piston, it has proven to be advantageous if the retaining ring has fastening recesses, such as, for example, blind holes or through-holes, which are connected via a positive connection to fastening means of the piston for fixing to the piston. Such a positive connection is advantageous for the disassembly of the release device, since the retaining ring and the piston can be separated from one another without being destroyed.

A possible embodiment provides that the fastening means of the piston are designed as projections, in particular as nose-like hooks, and / or as ribs. The fastening means are preferably formed integrally, in one piece and / or in one material with the piston.

An advantageous embodiment provides that the retaining ring has a plurality of, preferably four, fastening recesses and the piston has a plurality of, preferably four, fastening means corresponding to the number of fastening recesses.

It is particularly advantageous here if the fastening recesses and the fastening means are arranged uniformly distributed over the circumference.

The retaining ring is advantageously designed as an annular wave spring which has tabs which are arranged in a uniformly distributed manner over its circumference and extend in the axial direction and in which the fastening recesses are arranged.

It is also advantageous that the retaining ring between two adjacent plates has spring-shaped sections, for example with a hook-like cross section, which rest on a side surface of the bearing ring facing away from the piston. This creates a preload that positions both the release bearing and the piston relative to one another and centers them.

For assembly, it is advantageous if the number of through openings in the bearing ring corresponds to the number of tabs in the retaining ring.

To compensate for manufacturing tolerances, it is advantageous if there is radial play between the through openings and the tabs.

A possible embodiment of the hydraulic slave cylinder provides that at least the piston is made of a plastic. This enables a very light construction.

It is also advantageous if the retaining ring is designed as a sheet metal and / or stamped and / or bent part.

In other words, the invention consists in connecting / assembling a corrugated spring with four connection points directly to ribs of the plastic piston in a disengaging device. The bearing inner ring has four holes for the corrugated spring, a gap between the spring and the holes allowing radial displacement. The wave spring is used to connect the bearing to the plastic piston of the slave cylinder, which is also referred to as CSC (concentric slave cylinder), and to self-center the piston and the release bearing in relation to each other. Depending on the self-centering force required, the shaft thickness and height of the wave spring must be calculated to ensure that the requirements can be met.

It can therefore be said that, according to the invention, bores are provided in the bearing ring, through which four hooks of the retaining ring or retainer ring extend, and the retaining ring also has four tabs, which in turn have bores through which the retaining ring is connected to the piston. As a result, both the holding function and the centering function are fulfilled with only one component.

• 1 eine Teilansicht in Querschnittansicht einer erfindungsgemäßen Ausrückvorrichtung mit einem Ausrücklager, einem Haltering und einem Kolben;
• 2 die Ansicht aus 1 der Ausrückvorrichtung ohne Darstellung des Halterings und des Kolbens; und
• 3 eine perspektivische Ansicht des erfindungsgemäßen Halterings.

The invention is explained in more detail below with the aid of figures, in which a possible embodiment is shown. Show it:

• 1 a partial cross-sectional view of a release device according to the invention with a release bearing, a retaining ring and a piston;
• 2 the view 1 the release device without showing the retaining ring and the piston; and
• 3 a perspective view of the retaining ring according to the invention.

The figures are only schematic in nature and only serve to understand the invention. The same elements are provided with the same reference symbols.

Features of the individual exemplary embodiments can also be implemented in other exemplary embodiments. So they are interchangeable.

1 and 2 show a partial view of a disengaging device 1 , with a release bearing 2 , which here has two bearing rings 3 . 3 having. In 1 is also a retaining ring 4 and a piston 5 shown. The retaining ring 4 engages in the bearing ring 3 trained through openings 6 and is at the release bearing 2 over a spring force generating section 7 axially fixed. tabs 8th (see also 3 ) reach through the openings 6 which here in a bearing inner ring 9 are trained. In another assembly of the disengaging device, the through openings 6 instead of in the bearing inner ring 9 also in a bearing outer ring 10 be trained.

Regarding 3 is the retaining ring 4 as an annular wave spring 11 educated. The tabs 8th , here a total of four, are evenly distributed over the circumference and extend in the axial direction of the retaining ring 4 , The tabs 8th each have a mounting recess 12 on that here as a through hole 13 is trained. Alternatively, the mounting recess 12 also be designed as a blind hole. Between adjacent tabs 8th is a spring force generating section 7 arranged, which in the assembled state of the release device 1 on one side 14 of the bearing inner ring 9 applied to the piston 5 is turned away.

Referring back to 1 points the piston 5 fastener 15 on, in the exemplary embodiment shown here as hook-like noses 16 are trained. Other geometric shapes are also conceivable. The fasteners are general 15 designed as radially outward projections or ribs.

The fasteners 15 are in the same number as the mounting recesses 12 in the tabs 8th of the retaining ring 4 provided and also equally distributed over the circumference. Together with the mounting recesses 12 form the fasteners 15 in the assembled or assembled state, a form fit, which in interaction with the reaching through of the tabs 8th through the through holes 6 and the concern of the spring force generating section 7 on the bearing ring 3 of the release bearing 2 the release bearing 2 and the piston 5 both positioned to each other as well as the release bearing 2 centered.

LIST OF REFERENCE NUMBERS

1

declutching

2

release bearing

3

bearing ring

4

retaining ring

5

piston

6

Through opening

7

spring force generating section

8th

tabs

9

Bearing inner ring

10

Bearing outer ring

11

Well spring

12

mounting recess

13

Through opening

14

side surface

15

Fasteners

16

hook-like nose

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included 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.

Patent literature cited

• DE 102016220457 A1 [0002]

Claims (10)

Release device (1) for a drive train of a motor vehicle, with a hydraulic slave cylinder and a release bearing (2) with at least one bearing ring (3), the release bearing (2) having a retaining ring (4) which is connected to a piston (5) of the hydraulic Slave cylinder is mounted at least axially fixed, the retaining ring (4) acting on the bearing ring (3) in a force-transmitting manner, characterized in that the bearing ring (3) has at least one through opening (6) through which the retaining ring (4) engages. Release device (1) according to Claim 1 , characterized in that the retaining ring (4) passes through an inner bearing ring (9). Release device (1) according to Claim 1 or 2 , characterized in that the retaining ring (4) is designed and arranged such that it serves to center the release bearing (2). Release device (1) according to one of claims 1 to 3, characterized in that the retaining ring (4) has fastening recesses (12) which are connected via a positive connection to fastening means (15) of the piston (5) for fixing to the piston (5). Release device (1) according to Claim 4 , characterized in that the fastening means (15) of the piston (5) are designed as a projection. Release device (1) according to Claim 4 or 5 characterized in that the retaining ring (4) has a plurality of fastening recesses (12) and the piston (5) has a plurality of fastening means (15) corresponding to the number of fastening recesses (12). Release device (1) according to one of claims 4 to 6, characterized in that the fastening recesses (12) and the fastening means (15) are arranged uniformly distributed over the circumference. Disengaging device (1) according to one of claims 4 to 7, characterized in that the retaining ring (4) is designed as an annular wave spring (11) which has axially extending tabs (8) which are evenly distributed over its circumference and in which the Fastening recesses (12) are formed. Release device (1) according to Claim 8 , characterized in that the retaining ring (4) between two adjacent tabs (8) has sections (7) which produce spring force and which abut a side surface (14) of the bearing ring (3) facing away from the piston (5). Release device (1) according to Claim 8 or 9 , characterized in that the number of through openings (6) of the bearing ring (3) corresponds to the number of tabs (8) of the retaining ring (4).

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