CS270619B1 - Disengaging bearing for clutches - Google Patents

Description

57) Automotive industry. It addresses the problem of increasing the service life of a clutch release bearing for commercial vehicle clutches. The clutch release bearing consists of a single row ball bearing and a guide bush. The bearing ring of the bearing extends in the axial direction and a thrust ring is mounted on the bearing ring, which is supported by the diaphragm spring of the clutch. The outer ring of the bearing is provided with two opposing grooves and the guide bushing is provided with two opposing projections which extend through the grooves of the outer ring of the bearing. The guide sleeve rests in the direction of the release force on the retaining ring housed in the outer bearing ring.

Italy (11) (13) 51 (51) Int. Cl? F16D 15/60

FIG

CS 270619 01

AND

BACKGROUND OF THE INVENTION The invention relates to a clutch release bearing, in particular to couplings of traction embodiments for commercial vehicles. .

For controlling clutch couplings are known release bearings, which are made by the German company FICHTEL und SACHS and INA. FICHTEL und SACHS release bearing consists of an outer bearing ring which is pressed <on the guide bush and provided with protrusions *>

for clutch disengagement and groove to lock. Balls are placed between the rings in the cage. The inner ring extends in the axial direction and at its end a pressure ring is supported by a snap ring which rests against the diaphragm spring of the coupling. An auxiliary disk spring is arranged between the clutch diaphragm spring and the inner ring and a cover plate is provided on the outer ring of the bearing, which covers the entrance to the bearing ball space. This design does not allow the self-centering of the bearing, since this is guided radially through the guide sleeve. _at

The clutch diaphragm spring and thrust ring wear surfaces wear, reducing the service life of the release bearing. The INA release bearing consists of a plastic guide bushing on which a metal cover with protrusions for. clutch release. There is a play between the outer circumference of the guide sleeve and the inner circumference of the sheet metal cover. A radial-clutch housing accommodates a release bearing consisting of an outer ring, a ball cage and an inner ring which is fixed by means of a retaining ring, a compression ring and a spring to the diaphragm spring of the clutch. This design allows self-centering, but during the cut-off cycle, the bearing is forced out of the centered position by the radial force of friction of the cut-off lever by the amount of play between the plastic guide bushing and the tin plate. Upon completion of the release cycle, the central bearing is in the actual axis of rotation of the clutch diaphragm spring. Again, the coupling surfaces of the clutch diaphragm spring and thrust ring are worn out, reducing the service life of the release bearing.

It is an object of the present invention to improve a thrust bearing for pull-type couplings to increase service life.

The clutch release bearing consists of a single row ball bearing and a guide sleeve. The inner ring of the bearing extends in the axial direction and a thrust ring is mounted on it by a retaining ring, which is supported by the diaphragm spring of the clutch. SUMMARY OF THE INVENTION The outer ring of the bearing is provided with two opposing grooves and the guide bushing is provided with two opposing projections which extend through the grooves of the outer ring of the bearing. The guide sleeve rests in the direction of the release force against the retaining ring, which is housed in the outer bearing ring.

The design of the bearing allows it to be centered on the clutch diaphragm spring and this centering does not change during further operation. The wear of the contact surfaces between the clutch diaphragm spring and the thrust ring and the thrust ring wear are removed. The service life of the coupling is increased. The bearing is fully demountable, allowing its renovation. A two-stage seal - rubber rings, labyrinth and space - protects the bearing from dust penetration into the ball compartment. The bearing length is smaller than INA bearings. By using the bearing, higher technical and economical parameters are achieved when operating the clutch.

An example of a clutch release bearing according to the invention is shown in the accompanying drawings, in which Fig. 1 is a front view of the bearing and Fig. 2 is a section along line A-A of Figure 1.

The release bearing consists of a single row ball bearing and a guide sleeve which is provided with two protrusions ₂₉ facing each other. The guide bushing 1 is mounted on the guide 19. Around the hub of the guide bushing 7 is an inner bearing ring 2, on which the outer bearing ring 2 is mounted by means of balls 6, which is provided with a locking groove 2 for securing the position and grooves 7 through which the projections 2 of the guide sleeve χ pass. The inner race 2 of the bearing extends in the axial direction and at its end a snap ring 16 is supported by the circlip 17, which is supported by the diaphragm spring 15 of the coupling. A plate spring 14 is disposed between the clutch diaphragm spring 15 and the bearing inner ring 2, and a bearing plate 13 is provided on the outer bearing ring 4, covering the entrance to the ball space 6, which is sealed on one side by the first rubber ring 12 and a ring 11 and a labyrinth 20 formed between the cover plate 13 and the outer bearing ring 4. There is a space 21 between the bearing inner ring 2 and the guide bush X. ........

Between the two guide projection and the outer ring pouzdra.X £ bearing is a sliding pad 2, ⁰ which is supported auxiliary spring 10 supported on the outer ring of the bearing £. On the opposite side of the protrusion χ of the guide sleeve X there is a locking sliding washer 16, which protrudes with its protrusion against the safety ring 2, which is mounted in the outer bearing ring 6, against falling out. The retaining ring χ locks the axial position of the guide sleeve χ in the direction of the breaking force.

The guide bushing χ is guided radially on a guide 19 which is fixedly attached to a clutch housing or gearbox (not shown). The tripping force is transmitted from the control device (not shown) to the lugs 2 of the guide bushing X and further via the lock washer 18, the retaining ring 2, the outer bearing ring 6, the balls 6, the inner bearing ring 2, the retaining ring 17 and the supporting ring 16. the clutch that disengages the clutch.

After connecting the complete clutch assembly to the engine, the position X of the guide bush X is unambiguously determined by the guide 19 and the other parts of the release bearing are in a general floating position relative to the clutch spring 15 and the guide 19. When the clutch is rotated to identify the axis of rotation of the clutch and the release bearing, wherein the position of the axis 2 of the guide sleeve X is held in a constant position by the guide 19.

Claims (2)

OBJECT OF THE INVENTION Clutch release bearing, comprising a single row ball bearing and a guide bushing, wherein the inner race of the bearing is axially extended and a thrust ring is supported thereon by a thrust ring supported by the diaphragm spring of the clutch, characterized in that the outer ring (4) the bearing is provided with two opposing grooves (7) and the guide bushing (1) is provided with two opposing projections (2) which extend through the grooves (7) of the outer bearing ring (4). Clutch release bearing according to claim 1, characterized in that the guide sleeve (1) is supported in the direction of the release force by a locking ring (8) housed in the outer bearing ring (4).