DE102013208432A1 - release bearing - Google Patents

Abstract

According to the invention, a release bearing 1 is specified, in which the bearing inner ring 2, the bearing outer ring 3, the rolling elements 4 and the cage 6 are combined to form an assembly without the need for raceway increases. This succeeds in such a way that either the bearing outer ring 3 or the bearing inner ring 2 has a circumferential groove 9 on its side 8 facing the respective other bearing ring such that the cage 6 has an L-shaped profile comprising two legs 7.1, 7.2, the first Leg 7.1 of the L-shaped profile in the axial direction and the second leg 7.2 of the L-shaped profile extends in the radial direction, and that in the connected state of the bearing inner ring 2 and bearing outer ring 3, the second leg 7.2 engages in the groove 9.

Description

Field of the invention

The invention is concerned with the formation of Kupplungsausrücklagergehäusen - in the following called release bearing - as they are used for example for the operation of shift disconnect couplings in motor vehicles. An essential aspect is the formation of a prefabricated and interconnected assembly of bearing inner ring and bearing outer ring.

Out DE 2240383 it is known to actuate shift disconnect couplings to provide so-called release bearing. These release bearings are essentially formed by a bearing inner ring and a bearing outer ring. Between the coaxially arranged bearing rings rolling elements roll on provided by the bearing races raceways. For guiding and mutual spacing of the rolling elements, a cage is provided.

If a prefabricated assembly of the bearing inner ring, the bearing outer ring, the cage and the rolling elements are to be formed for better handling of release bearings, it is customary to work with so-called career overshoots. The following is understood by such track overshoots: Release bearings are essentially angular shoulder bearings in which the raceways of the bearing inner race and bearing outer race do not run parallel to the axis of rotation of the bearing. Rather, the running parallel to each other tracks of bearing inner and outer bearing ring of a Schrägschulter- or release bearing cut the axis of rotation of the bearing at an angle. Even if, according to the previous discussion, the impression has been given that at Schrägschulter- or release bearings rolling off between the bearing and the bearing outer ring round rolling elements only punctiform contact with - in the sense of the above consideration straight - have careers, such an idea be counteracted because according to the prior art, the raceways, despite their angled orientation a rounded, the deep groove ball bearing similar contour, in which nestle the rolling elements. If the raceways of bearing inner and outer bearing ring are formed in the manner just described and, for example, held by a cage rolling elements placed on the track of the bearing inner ring, no captive assembly of bearing inner, outer bearing, cage and rolling elements can be prepared by only the bearing outer ring is postponed. Therefore, the rounded raceways are extended so far in the axial direction that in the axial direction, a portion of a rolling element inserted into the raceway is completely surrounded by the raceway. This extension of the rounded track in the axial direction causes - as can easily be seen - with respect to the axis of rotation of the release bearing an increase in the raceway, so that it can be spoken of a Laufbahnerhöhung.

Are the respective raceways formed with corresponding Laufbahnerhöhungen and is then - to stay in the previous example - the bearing outer ring pushed onto the prepared with the cage and the rolling bearing inner race, a simple postponement of the Laufbahnerhöhung the bearing outer ring is initially hindered. However, since the Laufbahnerhöhung is small, then snap when increasing the Aufschiebekraft the rolling elements on the Laufbahnerhöhung on the bearing outer ring in its predetermined position and connect after snapping bearing inner and outer bearing ring, together with the rolling elements and the cage to form an assembly.

As can easily be seen, the connection to an assembly is largely dependent on tight tolerances, because it must be ensured that the snapping the rollers are not damaged, but still creates a captive connection. Since i.ü. To connect the assembly considerable (pressing) forces must be expended, such assemblies are not to be separated again by simple means, which makes the repair or replacement of rolling almost impossible.

Object of the invention

The invention is therefore based on the object of specifying a release bearing, in which a module formed from Lagerinnen- and outer bearing ring, rolling elements and cage can be mounted very easily and without much Auswand or dismantled.

Summary of the invention

This object is achieved with the features specified in claim 1. Advantageous training and further developments are the claims 2 to 6 can be removed.

Is either the bearing outer ring or the bearing inner ring provided on its side facing the other bearing ring side with a circumferential groove, the cage formed as a two leg comprehensive L-shaped profile, wherein the first leg of the L-shaped profile in the axial direction and the second leg of the L-shaped profile extends in the radial direction, and engages in the connected state of the bearing inner ring and bearing outer ring of the second leg in the groove, is a connection between Lagerinnen- and Bearing outer ring and the cage and the rolling elements created without the rolling elements are involved in this connection.

Heat and friction influences are reduced or completely excluded in this type of connection in the release bearing, if in the connected state of the bearing inner ring and bearing outer ring of the second leg of the L-shaped profile and the groove comply with each other a mutual axial and / or radial distance.

The assembly or disassembly of the module without great force is successful if at least the second leg of the L-shaped profile is made of an elastic material. If the second leg, made of an elastic material, comes into physical contact with the respective other bearing ring when the connection is made, this second leg gives way to the other bearing ring and then returns or snaps into the groove when both bearing rings are in contact final position have assumed.

It when the cage is integrally formed from the elastic material, because then no special process steps must be performed to form an elastic second leg is particularly advantageous.

Already at this point it should be mentioned that the second leg can also be formed of a non-elastic material when the groove is provided with a locking means which escapes under the influence of the then non-elastic second leg this when connecting the respective, aufzuschiebenden bearing ring and then snaps back and connects both bearing rings together when they have taken their predetermined position to each other.

It is particularly advantageous if at least the material of the second leg or even the entire cage is made of plastic. This is because in addition to the essential elasticity of the second leg, the necessary contours of the cage i.ü. very easily and without much effort as can be designed as an injection molded part.

A particularly good guidance of the rolling elements is given when the cage is a pocket cage, whose pockets completely surround these inserted rolling elements.

The effort in the case of cage production is reduced if the cage is a snap cage, the pockets of which are not completely surrounded in this inserted rolling elements.

Brief description of the figures

Show it:

1 a sectional view of a release bearing above the axis of rotation;

2 an enlarged detail according to 1 ;

3 a pocket cage according to the invention; and

4 a snap cage according to the invention.

Detailed description of the figures

The invention will now be explained in more detail with reference to FIGS. In 1 is a release bearing 1 shown in side section above the axis of rotation D. This release bearing 1 is essentially a bearing inner ring 2 and a bearing outer ring 3 formed, with the bearing outer ring 3 the bearing inner ring 2 Coaxially surrounds. Between bearing inner ring 2 and bearing outer ring 3 are rolling elements 4 arranged on the bearing rings 2 . 3 provided careers 5 roll. Only for the sake of completeness it should be noted that in the 1 and 2 the section does not pass through the center of a rolling element 4 is guided, but the cutting plane facing the 1 and 2 behind the center of the rolling element shown cut 4 lies. This causes the two in the 1 and 2 visible rolling elements 4 not at the raceways 5 are shown adjacent.

The rolling elements 5 the release bearing 1 are in a cage 6 arranged, which the different rolling elements 5 in the circumferential direction of the release bearing 1 at a mutual distance and i.ü. the rolling elements 5 also leads. This cage 6 is made entirely of plastic and has - as the presentation according to 1 can be clearly taken - a first leg 7.1 and a second leg 7.2 comprehensive L-shaped profile. In this case, the first leg extends 7.1. substantially parallel to the axis of rotation D of the release bearing 1 while the second leg 7.2 , which in this embodiment integral with the first leg 7.1 is connected, radially from the axis of rotation D of the release bearing 1 extends away.

As 2 , which only the ratios of the upper range of 1 shows enlarged, particularly good to take is on the side 8th of the bearing outer ring 3 which the bearing inner ring 2 facing, a circumferential groove 9 intended. In compliance with the axial and radial distance A to the groove 9 the second leg protrudes 7.2 in this one, when the assembly of bearing inner ring 2 . Bearing outer ring 3 , Cage 6 and rolling elements 4 is completed. By the intrusion of the second thigh 7.2 in the groove 9 ensures that all components of this module are connected to each other captive.

The completion of the assembly is done in such a way that initially the cage 6 , in which already the rolling elements 4 are used in 1 from the right onto the bearing inner ring 2 is pushed, so that the rolling elements 4 together with the cage holding her 6 on the from the bearing inner ring 2 provided career 5 rest. Then it is then looking up 1 also from the right of the bearing outer ring 3 on the formed unit of bearing inner ring 2 , Rolling elements 4 and cage 6 postponed.

Only for the sake of completeness it should be noted that during the postponement of the bearing outer ring 3 in the 1 and 2 visible seal 10 not yet with the bearing outer ring 3 connected is.

Then comes during the postponement of the face 11 of the bearing outer ring 3 with the second leg 7.2 in physical contact, this is because of its elasticity in the direction of arrow P ( 2 ) slightly bent. As the postponement continues, the page then slides 8th the bearing outer ring on the second, bent leg 7.2 along. Then has the bearing outer ring 3 his in 1 respectively. 2 taken shown end position, then expands the second leg 7.2 in the groove 9 , This expanding of the second leg 7.2 in the groove 9 Ensures that the assembly is made of bearing outer ring 3 , Bearing inner ring 2 , Rolling elements 4 and cage 6 is connected to one another for the transport or assembly of the assembly completely sufficient captive. As can be readily appreciated, the assembly formed, for example, to change the rolling elements 4 be dismantled again, in which a small force against the extension direction on the bearing outer ring 3 acts.

In 3 is a cage 6 in the training of a pocket cage 6.1 shown. It is clear the execution according to 3 removable, that every bag 12 if in it a rolling element (in 3 not shown), this completely from the respective bag 12 is bordered. Also is 3 removable, that the bags 12 all in the first, substantially parallel to the rotational axis D of the release bearing 1 arranged legs 7.1 are arranged and the upstanding, second leg 7.2 no function in relation to the inclusion of rolling elements 4 have, but only serve to connect the assembly.

Finally, it should be noted that an L-shaped profile is also understood to mean one in which the first leg 7.1 and the second leg 7.2 include an angle between 110 and 70 °. This deviates from the pure 90 ° angular relationship position of the two legs 7.1 . 7.2 can take advantage of threading and sliding along the second leg 7.2 on the side 8th of the bearing outer ring 3 have, if the bearing outer ring 3 - as in connection with the 1 and 2 described - postponed. An angular relationship of the second leg 7.2 to the first leg (s) 7.1 from 70 ° is in 3 shown.

4 shows a cage 6 in the training of a snap cage 6.2 , which also in the embodiments according to the 1 and 2 was used and in which in the pockets 12 inserted rolling elements (in 4 not shown) do not completely surround them. Like the 1 and 2 illustrate, in this embodiment, the in a bag 12 used rolling elements 4 from a first, in the first leg 7.1 provided pocket part 12.1 and a second, in the second pocket part 12.2 provided pocket part 12.2 added. The bags 12 the snap cage 6.2 become so with rolling elements 4 equipped by the rolling elements 4 looking up 4 from the right in the pocket parts 12.1 . 12.2 pressed in and after their impressions through the geometry of the pockets 12 be held in this captive.

LIST OF REFERENCE NUMBERS

1

 release bearing

2

 Bearing inner ring

3

 Bearing outer ring

4

 rolling elements

5

 raceways

6

 Cage

6.1

 bag cage

6.2

 snap cage

7.1

 first leg

7.2.

 second leg

8th

 page

9

 groove

10

poetry

11

 face

12

 bag

12.1

 first pocket part

12.2

 second pocket part

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 2240383 [0002]

Claims (6)

release bearing 1 with a bearing inner ring 2 coming from a bearing outer ring 3 Coaxially surrounded, with rolling elements 4 Starting from the bearing rings 2 . 3 provided careers 5 unroll, and with a cage 6 that the rolling elements 4 in the circumferential direction of the release bearing 1 keeps at a mutual distance and the rolling elements 4 leads, characterized in that either the bearing outer ring 3 or the bearing inner ring 2 at its side facing the other bearing ring side 8th a circumferential groove 9 that has the cage 6 a two thigh 7.1 . 7.2 has extensive L-shaped profile, wherein the first leg 7.1 the L-shaped profile in the axial direction and the second leg 7.2 of the L-shaped profile extends in the radial direction, and that in the connected state of bearing inner ring 2 and bearing outer ring 3 the second leg 7.2 in the groove 9 intervenes. Release bearing according to claim 1, characterized in that in the connected state of the bearing inner ring 2 and bearing outer ring 3 the second leg 7.2 of the L-shaped profile and the groove 9 maintain a mutual axial and / or radial distance A to each other. Release bearing according to claim 1 or claim 2, characterized in that at least the second leg 7.2 of the L-shaped profile is made of an elastic material. Release bearing according to claim 3 characterized in that the material from which at least the second leg 7.2 of the L-shaped profile is made of plastic. Release bearing according to one of claims 1 to 4, characterized in that the cage 6 a pocket cage 6.1 is whose pockets in these inserted rolling elements 4 completely border. Release bearing according to one of claims 1 to 4, characterized in that the cage 6 a snap cage 6.2 is whose pockets 12 in this inserted rolling elements 4 not completely bordered.

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