WO2015000477A1

WO2015000477A1 - Self-adjusting clutch release bearing, and method for producing an impact compensation bearing for a self-adjusting clutch release bearing

Info

Publication number: WO2015000477A1
Application number: PCT/DE2014/200271
Authority: WO
Inventors: Jerome Malitourne; Luben Krahtov
Original assignee: Schaeffler Technologies Gmbh & Co. Kg (Angestellter)
Priority date: 2013-07-04
Filing date: 2014-06-20
Publication date: 2015-01-08
Also published as: DE112014003122A5; CN205780434U; DE102014211813A1

Abstract

The invention relates to a self-adjusting clutch release bearing consisting of an inner ring and an outer ring, between which rolling bodies are arranged. The inner ring is in contact with an impact compensation bearing consisting of a dome-like release ring on which a slide ring is arranged in a kinematically rigid manner. In an inexpensively producible clutch release bearing, the dome-like release ring comprises a support ring on which a circumferential dome portion pointing in the axial direction is formed, said dome-like release ring being formed as a punched sheet metal part on which the separate slide ring is arranged in a formfitting and/or bonded manner.

Description

Self-adjusting clutch release bearing and method of making a shock-absorbing bearing for a self-adjusting clutch release bearing

The invention relates to a self-adjusting clutch release bearing, consisting of an inner ring and an outer ring, between which rolling elements are arranged, wherein the inner ring is in contact with a shock-absorbing bearing, which consists of a dome-like release ring, on which kinematically fixed a sliding ring is arranged.

The invention is used in release systems for single or double clutch systems, which are used in motor vehicles and have a shock-absorbing bearings.

From DE 70 36 423 U a coupling bearing is known, which consists of an outer ring and an inner ring, between which rolling elements are mounted. The inner ring of the release bearing engages with an axially directed shoulder via an axially directed portion of a provided with at least one curved end face release ring. Between the inner ring and the release ring, a compensation ring made of elastic material is arranged. By means of this arrangement, smaller misalignments between the release bearing and the clutch are compensated for, with the release bearing centering itself. In addition, tumbling movements of the clutch disc are not transferred to the actual bearing. The compensation ring is loosely placed on the release ring or is glued to the release ring.

DE 101 14 844 A1 shows a self-adjusting clutch release bearing, which also has an inner ring and a peripheral outer ring, between which rolling elements are guided. An integrally connected to the inner ring flange forms with a support ring Kugelkalottensegmente to achieve a self-aligning release bearing. In particular, a sliding element is attached by injection molding on the support ring.

Due to the complex geometry of the dome segment on the support ring most support rings are designed as a rotated part. In order to ensure a good overmolding with a plastic forming the slide ring on the support ring, this support ring made of steel must often be hard turned in the hardened state, resulting in very high production costs. The invention is therefore an object of the invention to provide a self-adjusting clutch release bearing, in which the impact compensation bearing is easy to manufacture and still reliably on the release bearing sliding the position of the plate spring of the clutch can compensate.

According to the invention the object is achieved in that the dome-like release ring has a support ring on which a circumferential, pointing in the axial direction Kalottenabschnitt is worked out, wherein the dome-like release ring is formed as a punched sheet metal part on which the separate seal ring arranged positively and / or cohesively is. This has the advantage that a mechanical processing of the calotte-like disengagement ring produced from a sheet metal part can be reduced to a minimum after the stamping and bending operation, since only one clamping of the circulating calotte section is necessary. Such a dome-like release ring is movable at an angle, so that an approximately existing wobble of the clutch is caught by this and not passed on to the release bearing. In addition, the release bearing centered itself. Furthermore, also compensated by such a shock-absorbing bearing misalignment in relation to the coupling axis.

Advantageously, the sliding ring can be clipped into a circumferential groove formed between the carrier ring and the dome portion of the dome-like disengagement ring. Due to this geometry, a separate slide ring made of plastic can simply be clipped into the dome-like release ring, which reduces the manufacturing costs. In contrast to a Kunststoffumspritzung a separate slide ring is used, which engages positively in the calotte-like release ring.

In order to increase the elasticity of the sliding ring during the clipping in the calotte-like disengagement ring, the slip ring has at least one pair of notches, which are formed perpendicular to the radial extent of the slip ring.

In one embodiment, the sliding ring on the dome-like release ring by

Ultrasonic welding attached. This ensures that the slide ring is permanently connected to the dome-like disengagement ring, whereby a kinematic movement between disengaging ring and slide ring is reliably prevented. The kinematic movement takes place exclusively between the, the sliding ring-bearing calotte-like release ring and the inner ring of the release bearing, wherein the release ring can be tilted in its position relative to the release bearing. Through the sliding ring wear or Friction losses compared to the release bearing minimized. This measure simultaneously avoids an adverse noise. Furthermore, a significantly increased life of the dome-like release ring is guaranteed. The design of the contact region, in which at least the calotte section is designed to reduce wear and friction, decisively improves the possibility of self-adjustment between the inner ring and the release ring.

In one embodiment, the sliding ring formed of a plastic on a surface facing the dome-like disengagement ring has at least one circumferential, projecting rib for melting during ultrasonic welding. By this melting a reliable attachment of the seal ring is ensured at the Kalottenabschnitt and at the same time realizes a rotation of the seal ring for dome-like release ring.

In order to improve the effect of the rotation, the sliding ring facing surface of the circumferential dome portion of the calotte-like disengagement ring is roughened. Preferably, this has a knurling. A knurling is understood to mean a material processing in which a pattern is embossed in the circumferential dome section. Compared to smooth surfaces such grip surfaces allow a better connection of the slide ring with the dome-like release ring.

A further development of the invention relates to a method for producing a shock-absorbing bearing for a self-adjusting release bearing in which a slip ring is applied to a dome-like release ring. In a method in which the impact compensation bearing can be produced inexpensively, the dome-like release ring made of steel is punched out of a sheet metal and then the slip ring is clipped into the calotte-like release ring or welded by means of ultrasound. This has the advantage that a cost reduction in the production of impact compensation bearing is possible, which is not only due to the use of a sheet, but also due to a reduced mechanical reworking on the punched dome-like release ring.

Advantageously, a stamped-out support ring of the dome-like release ring is turned off in a predetermined height. Due to this turning process, it is easily possible, depending on the application of the shock-absorbing bearing to adjust this to a predetermined height, so that its dimensions well with the space to match, which provides the release bearing comprehensive coupling.

In one embodiment, a circumferential Kalottenabschnitt the calotte-like release ring is rotated in a predetermined shape and then knurled. By means of the turning operation, the dimensions of the circumferential dome section of the dome-like disengagement ring are adjusted, while the knurling process roughens the surface of the dome section which receives the slip ring in order to realize an anti-rotation lock of the slide ring formed of plastic.

The invention allows numerous embodiments. Two of these will be explained in more detail with reference to the figures shown in the drawing.

Show it:

1 shows a first embodiment of the clutch release bearing according to the invention,

2 shows a perspective view of the components of the impact compensating bearing according to FIG

Fig. 1,

3 shows a first embodiment of a method for producing the shock-absorbing bearing,

4 shows a second embodiment of the clutch release bearing according to the invention,

5 shows a perspective view of the components of the impact compensating bearing according to FIG. 4, FIG.

6 shows a second embodiment of the method for producing the impact compensation ring,

Fig. 7: a third embodiment for adjusting the height of the impact compensation ring.

Identical features are identified by the same reference numerals. In Fig. 1, a first embodiment of the self-adjusting clutch release bearing 1 is shown. The clutch release bearing 1 consists of an outer ring 2 and an inner ring 3, between which a plurality of rolling elements 4 are arranged. At an angle of approximately 135 ° spanning leg 5 of the inner ring 3 is the impact compensation bearing 7, 8 at. The impact compensation bearing 7, 8 consists of a made of steel dome-like release ring 7 and resting on the calotte-like release ring 7 slide ring 8. The slip ring 8, which is made of plastic, runs parallel to a support ring 7.1 and inclined to this support ring 7.1 formed , Circumferential Kalottenabschnitt 7.2, wherein the support ring 7.1 and the dome section 7.2 7.2 form the dome-like release ring. Here, the Kalottenabschnitt 7.2 is connected to the seal ring 8 by means of ultrasonic welding, so that the dome-like release ring 7 and the seal ring 8 can not lose. The sliding ring 8 contacted in this position, the legs 5 of the inner ring 3, wherein the impact compensating bearing 7, 8 and the legs 5 of the inner ring 3 are mounted to each other movable. Here, the impact compensating bearing 7, 8 is a ball joint connection, which can tilt at an angle relative to the leg 5 of the inner ring 3.

In Fig. 2 is a perspective view of the dome-like release ring 7 and the slide ring 8 is shown. The existing steel carrier ring 7.1 of the dome-like disengaging ring 7 is formed as a flat circular ring, in the interior of which the circumferential Kalottenabschnitt 7.2 is integrally formed, which expands circumferentially in an axial direction. The surface of the Kalottenabschnittes 7.2, which is opposite to the sliding ring 8, in this case has a knurled structure to roughen the surface and to support an attachment of the slide ring 8. The existing plastic slide ring 8 has in Fig. 2, three projecting, circumferential ribs 8.1, 8.2, 8.3, which melt during ultrasonic welding, wherein the rib 8.1 flows into a groove 9 of the dome-like Ausrückringes 7, while the ribs 8.2, 8.3 in the Interiors of the knurled surface of the Kalottenabschnitts 7.2 flow and thus enter into a non-detachable cohesive connection with the dome-like release ring 7. The ribs 8.2 and 8.3 form by the material connection with the Kalottenabschnitt 7.2 an anti-rotation, while the connection of the rib 8.1 with the groove 9 prevents axial displacement of the slide ring 8. An outwardly projecting edge 8.4 of the slide ring 8 is applied to the support ring 7.1.

In Fig. 3 shows an embodiment for producing the impact compensating bearing 7, 8 is shown. In this case, the dome-like release ring 7 of the impact compensation bearing 7, 8 punched out of a sheet (step A). Subsequently, the punched release ring 7 is abgeschlif- fen to unevenness by the punching process. By bending the circumferential Kalottenabschnitt 7.2 is designed at a predetermined angle from the circular inner edge of the support ring 7.1, being realized by a Spanabhebendes method, such as turning, the desired shape and by knurling a patterned surface (step B). In the subsequent step C, the sliding ring 8 is placed on the disengaging ring 7 so that the ribs 8.1, 8.2, 8.3, which are designated in connection with FIG. 2, rest on the knurled surface of the calotte section 7.2. During the subsequent ultrasonic welding, these ribs 8.1, 8.2, 8.3 melt and run in the knurled pattern, which leads to a permanent connection between the sliding ring 8 and the disengaging ring 7.

A second embodiment of the clutch release bearing 1 according to the invention is shown in Fig. 4. FIG. 4 differs from FIG. 1 only in that the slide ring 8 is clipped with the dome-like release ring 7 and thus both form a positive connection. In this case, a projection 8.5 of the sliding ring 8, which runs circumferentially radially, opposite to the edge 8.4, engages in a groove 9 of the dome-like disengagement ring 7. The groove 9 is formed between the support ring 7.1 and the dome portion 7.2. As shown in FIG. 5, the slide ring 8 has a pair of notches 6, which are formed perpendicular to the circumferential extent of the slide ring 8. Advantageously, four such pairs of notches 6 are formed in the 90 ° distance over the entire slide ring 8 of time. By means of these notches 6, the elasticity of the slide ring 8 is increased during clipping into the calotte-like release ring 7.

FIG. 6 shows a second exemplary embodiment for producing the impact compensation bearing 7, 8, in which steps D and E are identical to the steps A and B according to FIG. 3. In step F of FIG. 6, the protrusion 8. 5 is inserted into the groove 9 with the aid of the existing notches 10, so that a tight connection is produced in a form-fitting manner between the sliding ring 8 and the disengaging ring 7.

In order to ensure that the impact compensating bearing 7. 8 thus produced can be used for different coupling systems of different sizes, a sheet metal having a thickness d, which is the largest required thickness for all applications of the impact compensating bearing 7, 8, is required for punching out the dome-like release ring 7 equivalent. In order to use a once-made impact compensation bearing 7, 8 for a variety of applications, the thickness d of the sheet, which determines the height of the support ring 7.1, turned off for different heights. As can be seen from FIG. 7, between the largest thickness d and the minimum thickness dm of the support ring 7.1 eleven different height classes are provided. Thus, a shock-absorbing bearing 7, 8 can be produced with only a single manufacturing process, which can be used at minimal cost versatile in various coupling systems.

LIST OF REFERENCES

1 clutch release bearing

outer ring

inner ring

rolling elements

Leg of the inner ring

Pair of notches

7 dome-like release ring

7.1 carrier ring

7.2 dome section

8 sliding ring

8.1 rib

8.2 rib

8.3 rib

8.4 edge

8.5 lead

9 groove

the largest thickness

dm minimum thickness

Claims

claims

1 . Self-adjusting clutch release bearing, consisting of an inner ring (3) and an outer ring (2), between which rolling elements (4) are arranged, wherein the inner ring (3) with a shock-absorbing bearing (7, 8) is in contact, which consists of a dome-like release ring ( 7), on which kinematically fixed a sliding ring (8) is arranged, characterized in that the dome-like disengagement ring (7) comprises a support ring (7.1) on which a circumferential, pointing in the axial direction Kalottenabschnitt (7.2) is formed, wherein the dome-like release ring (7) is designed as a stamped sheet metal part on which the separate seal ring (8) is arranged positively and / or cohesively.

2. clutch release bearing according to claim 1, characterized in that the sliding ring (8) in a, between the support ring (7.1) and Kalottenabschnitt (7.2) of the dome-like Ausrückringes (7) formed circumferential groove (9) is clipped.

3. clutch release bearing according to claim 2, characterized in that the sliding ring (8) has at least one pair of notches (6) which are formed perpendicular to the radial extent of the sliding ring (8) in this.

4. clutch release bearing according to claim 1, characterized in that the sliding ring (8) on the dome-like release ring (7) is fixed by ultrasonic welding.

5. clutch release bearing according to claim 4, characterized in that the formed of a plastic seal (8) on a surface which faces the calotte-like release ring (7), at least one circumferential, projecting rib (8.1, 8.2, 8.3) for melting Having ultrasonic welding.

6. clutch release bearing according to at least one of the preceding claims, characterized in that the circumferential Kalottenabschnitt (7.2) of the dome-like Ausrückringes (7) is roughened on one, the sliding ring (8) facing surface.

7. clutch release bearing according to at least one of the preceding claims 1 to 5, characterized in that the sliding ring (8) facing surface of the circumferential Kalottenabschnitts (7.2) has a knurling.

8. A method for producing a shock-absorbing bearing for a self-adjusting release bearing, wherein on a dome-like release ring (7), a slide ring (8) is applied, characterized in that the dome-shaped Ausrückring consisting of steel (7) is punched out of a metal sheet and then the Slip ring (8) is clipped into the punched dome-like release ring (7) or welded by means of ultrasound.

9. The method according to claim 8, characterized in that a punched-out carrier ring (7.1) of the dome-like Ausrückringes (7) is turned off in a predetermined height.

10. The method according to claim 8 or 9, characterized in that a circumferential Kalottenabschnitt (7.2) of the dome-like Ausrückringes (7) is rotated in a predetermined shape and then knurled.