DE102013208715A1 - release bearing - Google Patents

Abstract

According to the invention, a release bearing 1 is specified, the housing 3 of which is made of plastic and is operatively connected to a release lever 6. To improve the wear resistance of the housing 3, it is proposed to provide at least the contact surfaces 5.1, 5.2 of the housing 3, on which the release lever 6 rests on the housing 3, with a metal reinforcement 7.

Description

Field of the invention

The invention is concerned with the formation of the housing of release bearings, such as those used for the operation of shift disconnect clutches of internal combustion engines.

In general, it is customary to provide shift disconnect clutches of internal combustion engines with so-called release bearings, which are arranged on a so-called sliding sleeve. These release bearings generally have a first and a second bearing ring, wherein the second bearing ring surrounds the first bearing ring coaxially. Furthermore, rolling bodies are provided, which roll between the bearing rings on provided raceways. The first bearing ring of such a release bearing is in physical contact with the diaphragm springs of a shift disconnect clutch, while the second, stationary bearing ring is in operative connection with a housing or is connected to the housing. If the drive train to be interrupted via the gearshift clutch, the housing is moved axially together with the second bearing ring against the action of the diaphragm springs. The axial force of the housing triggering force is generally introduced via a so-called release lever, which rests against the housing provided, usually rounded trained contact surfaces.

Such a release bearing is about DE 10152484 known. Details of the housing are EP 0908640 removable. Also, the last-named document can be found that the housing used for this purpose are made of plastic.

A disadvantage is felt that made of plastic housing by the constant rubbing contact with the release lever are subject to increased wear.

Object of the invention

Therefore, the invention has for its object to provide a release bearing, the housing is also made of plastic, but identifies a higher wear resistance to the action of the release lever.

Summary of the invention

This object is achieved with the features of claim 1. Advantageous embodiments and further developments of the invention are the claims 2 and 3 can be removed.

If a metal reinforcement is provided, which bears against the housing, it is precluded that plastic is removed by the frictional contact of the release lever on the housing.

Since similar to the bearing rings and the housing have a round outer contour, it is particularly advantageous if the metal reinforcement is annular and can be pushed onto the housing. This is because in this case the otherwise required complex connection of the various metal reinforcements to the corresponding contact surfaces of the housing can be omitted and to protect the housing, only the annular metal reinforcement must be pushed as a whole onto the housing.

If an additional safeguard and / or a particularly simple way of connecting the metal reinforcement to the housing is required, it is advantageous if latching means are provided on the housing and the metal reinforcement which fixes the respective metal reinforcement on the housing when the respective metal reinforcement is joined to the housing ,

Brief description of the figures

Show it:

1 a release bearing according to the prior art;

2 a release bearing according to the invention; and

3 an exploded view of a release bearing according to the invention.

Detailed description of the figures

Ways to carry out the invention

The invention will now be explained in more detail with reference to FIGS.

In 1 is a release bearing 1 shown according to the prior art.

From this release bearing 1 are in 1 only the second, stationary bearing ring 2 and the case 3 visible, with the housing made entirely of plastic 3 at one of the second bearing ring 2 provided flange 4 is applied.

Furthermore, in 1 two contact surfaces 5.1 . 5.2 on the housing 3 provided, which are rounded and formed with a release lever 6 (in 1 only indicated by the dashed representation) are in operative connection. Will now from the release lever 6 a force K on the contact surfaces 5.1 . 5.2 exercised, the housing becomes 3 and with him the second bearing ring 2 - looking up 1 - moved to the right.

In 2 is a release bearing 1 shown according to the invention. This release bearing 1 differs from the release bearing in 1 only by the fact that on the housing 3 an annular metal reinforcement 7 is pushed on and on a housing shoulder 8th is applied. Also is 2 removable, that the two contact surfaces 5.1 . 5.2 for the release lever 6 (in 2 not shown) from the metal reinforcement 7 be provided by each contact surface 5.1 . 5.2 a part of the housing shoulder 8th arched over.

Only for the sake of completeness, it should be noted that the contact surfaces 5.1 . 5.2 not necessary the housing shoulder 8th have to span cantilevered. Rather, in another - not shown - embodiment, the arcuate design of the contact surfaces 5.1 . 5.2 also by an appropriately trained housing shoulder 8th be fully or partially supported.

Finally, in 2 also a locking means in the form of a latching hook 9 provided, which on the housing 3 is trained. Will be a ring-shaped metal reinforcement 7 on the case 3 deferred, gives way to the latching hook 9 the metal reinforcement 7 radially inward and then snaps back when the metal reinforcement 7 their in 2 shown end position on the housing 3 has taken. This snatching of the metal reinforcement is a captive connection of metal reinforcement 7 and housing 3 created.

In 3 is a release bearing 1 according to 2 shown closer. The left sectional view according to 3 shows that the second bearing ring 2 a first bearing ring 10 coaxially edged. Between the two bearing rings 2 . 10 roll up from the bearing rings 2 . 10 prepared careers 11 rolling elements 12 from.

In the right part of the representation of 3 are some items of release bearing 1 shown drawn out, namely a spring washer 13 with which the flange 4 of the second bearing ring 2 on the housing 3 is fixed, the second bearing ring 2 , the annular metal reinforcement 7 with the two contact surfaces 5.1 . 5.2 and the case 3 made of plastic.

LIST OF REFERENCE NUMBERS

1

 release bearing

2

second bearing ring

3

 casing

4

 flange

5.1, 5.2

 contact surfaces

6

release lever

7

 metal reinforcement

8th

housing shoulder

9

 latch hook

10

 first bearing ring

11

 career

12

rolling elements

13

spring washer

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 10152484 [0003]
• EP 0908640 [0003]

Claims (3)

Release bearing with a first bearing ring 10 and a second bearing ring 2 who made the first bearing ring 10 Coaxially surrounds, with rolling elements 12 Starting from the bearing rings 2 . 10 provided careers 11 unroll, and with a housing 3 made of plastic, which with the respective standing of the two bearing rings 2 is in operative connection and which contact surfaces 5.1 . 5.2 having at which a release lever 6 for introducing a force K is applied, characterized in that a metal reinforcement 7 is provided, which on the housing 3 is applied. Release bearing according to claim 1, characterized in that the metal reinforcement 7 is annular and on the housing 3 is deferrable. Release bearing according to claim 1 or claim 2, characterized in that latching means 9 on the housing 3 and the metal reinforcement 7 are provided, which the respective metal reinforcement 7 on the housing 3 fixed, if the respective metal reinforcement 7 with the housing 3 is joined together.

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