FR2927679A1 - Clutch release bearing device for gearbox, has stop ring placed on crown shaped ring section such that stop ring is rotated relative to bearing ring around crown shaped ring center provided on stop axis - Google Patents

Abstract

The device has bearing rings (1, 2) respectively forming raceways for two sets of rolling elements (B1, B2) and respectively constituting non-peripheral and peripheral bearing rings. A stop ring (3) transmits an axial force introduced in the bearing ring (1) to a clutch device (4). The stop ring includes an articulated ring (GR) formed in a manner complementary to that of a crown shaped ring section (K1) and is placed on the ring section such that the stop ring is rotated relative to the bearing ring (2) around a crown shaped ring center (Z) provided on a stop axis (X).

Description

CLUTCH DEVICE

Field of the Invention The present invention relates to a disengaging device. The present invention more specifically concerns a clutch release bearing device comprising: - a first bearing race (1) which forms a first raceway for rolling elements (Bi) and which constitutes the non-peripheral raceway, - a second raceway wheel (2) which forms a second rolling element rolling track (B2) and which constitutes the peripheral rolling ring, - rolling elements (W) which are received in a track space (B) delimited between the first and the second bearing ring (1, 2), and - an abutment ring (3) for the transmission of an axial force introduced into the first bearing ring (1) to a clutch device (4), - in wherein the rolling element rolling tracks (B1, B2) formed by the two bearing rings (1, 2) are designed so that it results in including the rolling elements (W) mentioned a bearing ball assembly within range oblique. It is known from DE 10 2005 037 514 A1 a double-clutch gearbox, whose clutches each have spring plates which are actuated by clutch release stops. These clutch release stops are each made as an angular bearing ball bearing, the two bearing rings being manufactured as stamped components. For the two clutch releases of this gearbox, the inner bearing ring forms the peripheral bearing ring. The axial displacement required to modify the engagement state of the clutch of each clutch release bearing is effected by axial biasing and displacement of the clutch release bearing. Also known from DE 43 38 261 B4 a clutch release bearing, the two bearing rings are made as stamped moldings and for which an angular bearing ball bearing is made above these two rings in cooperation with rolling elements included. the inner bearing ring forms the rotary bearing ring, the outer bearing ring forms the stationary bearing ring and provided for the introduction of the actuating forces.

OBJECT OF THE INVENTION The present invention aims to indicate solutions, by which it is possible to create disengaging devices which are distinguished by a compact structure and a particularly advantageous mechanical service behavior.

Solution according to the invention This object is achieved according to the invention by a clutch release device with:

a first rolling ring which forms a first raceway for rolling elements and which constitutes the non-peripheral bearing race; a second raceway which forms a second raceway on rolling elements and which constitutes the peripheral raceway; rolling elements which are received in a track space delimited between the first and second bearing rings, and a thrust ring for the transmission of an axial force introduced into the first bearing ring to a device clutch, in which the rolling element rolling tracks formed by the two rolling rings are designed so that it results in including the rolling elements mentioned an oblique bearing ball bearing assembly, in which this thrust device of disengagement is distinguished by the fact that the second race is provided in an outer peripheral zone bo providing the second rolling element rolling track of a cap-like ring segment outwardly convexly flaring with a cap-shaped ring center on the abutment axis, and - that the thrust ring has a hinged ring made complementary to the cap-shaped ring section and is placed on the cap-shaped ring section so that the thrust ring can be tilted with respect to the

second bearing ring around the center of cap-shaped ring located on the stop axis. It is thereby advantageously possible to create a disengagement device, for which a contact surface provided for the actuation of the clutch members is approximately at the axial level of a rolling element circulation lane. and by means of which, furthermore, during the transmission of the axial forces guided by the clutch release device towards the clutch members, a uniform peripheral load distribution on the thrust ring as well as on the rolling elements rolling tracks . According to a particularly preferred embodiment of the invention, the cap-shaped ring section is made so that a conical bearing-axis envelope defined by the geometry of the oblique-span ball bearing separates the section of cap-like ring in two annular zones which present in an axial abutment cut substantially the same annular zone width. The first bearing ring can be made here in particular as a shaped race made of sheet metal. This shaped ring of sheet metal can be made in particular as a stamped component. On this shaped sheet metal bearing ring, an annular collar or annular branch protruding radially inwards can be integrally formed, whereby the actuating forces provided for the axial displacement of the first bearing ring can be introduced and the ring suspended bearing. The hinged collar is preferably designed so as to seat through a slippery material member on the crown ring section. The slider member is preferably anchored to the second race so that the hinge ring can be tilted relative to the slippery material member. As an alternative to this embodiment, it is also possible to anchor the sliding material member on the hinged ring so that it can be tilted together with the sliding material member with respect to the second bearing ring. .

It is also possible finally to achieve on the bearing ring and on the hinged ring elements of sliding material which form as such ring-shaped seat surfaces complementary to each other, through which the two elements made of sliding material and thus also the abutment components carrying them, that is to say the second race ring and the hinged ring are supported pivotally on one another.

According to another aspect of the present invention, it is also possible to produce the sliding material element as a structural component which ultimately functions as a retaining member and thereby locks the hinged ring or stop ring formed by the hinged ring on the second bearing ring.

The aforementioned sliding material element is made according to a particular aspect of the present invention as a composite component which comprises as such a relatively high structural strength bearing layer and a layer of sliding material bonded sufficiently securely thereto. The carrier layer is preferably made of a plastically deformable metal material, in particular steel. The layer of sliding material is preferably bonded to the carrier layer. It is possible to integrate this sliding material element in the clutch release device according to the invention also during a material connection, in particular to weld the carrier layer to the second race or to braze with it. The angular ball bearing and the articulation of the ring-shaped cap are preferably configured so that the tip of the cone of the bearing axis of the angular bearing ball bearing is at least near the center of the cap-shaped ring of the hinge of the cap-shaped ring on the rotary axis of the second race.

Preferably, the disengaging device according to the invention is housed so that the first bearing ring can be slightly displaced in the radial direction. In addition, a sealing device is preferably provided to seal a slot area defined between the two bearing rings. This sealing device may be constructed to include a separate abutment ring member to which is attached a sealing lip device made of an elastomeric material. The clutch abutment device preferably also comprises a cage device which serves as such to guide the rolling elements in the tread area defined between the two races. It is possible to use this cage device as a suspension structure, through which the sealing devices provided for sealing the rolling element track space are locked in the disengaging stop device. It is further possible to realize the cage device and the two races so that the cage device is guided in the radial direction by at least one of the two bearing rings. A snap-in structure can be realized by the cage device, whereby the two bearing rings are joined sufficiently without loss. This lossless meeting can also be achieved by designing the two rolling element rolling tracks so that the raceway extending into the small diameter inner race groove extends between rolling tracks with a larger diameter. and the raceway extending into the rolling groove of the larger diameter outer race extends between two smaller diameter raceways. It is possible by this to achieve an axial locking under the effect of the rolling elements and the cage device.

BRIEF DESCRIPTION OF THE DRAWINGS Further details and features of the invention will become apparent from the drawings, the figures of which show: FIG. 1: an axial section serving to represent the structure of a disengaging stop device according to FIG. FIG. 2: an axial section for representing the structure of a second variant of a clutch release device according to the invention, FIG. 3: an axial section serving to represent the structure of a third variant of FIG. 4: an axial section serving to represent the structure of a fourth variant of a disengagement stop device according to the invention, FIG. 5: an axial section serving to provide a clutch abutment device according to the invention, FIG. represent the structure of a fifth variant of a clutch release device according to the invention. DETAILED DESCRIPTION OF THE DRAWINGS The disengaging stopper device shown in FIG. 1 comprises a first raceway 1 which forms a first rolling element rolling track B1 and which constitutes the non-peripheral raceway. The clutch abutment device further comprises a second race 2 which forms a second raceway for rolling elements B2 and which constitutes the peripheral raceway. The second bearing ring 2 surrounds

the first bearing ring 1. The two bearing rings 1, 2 are arranged coaxially to one another or overlap in the axial direction. The clutch release device further comprises rolling elements W which are received in a track space B delimited between the first and second bearing rings, as well as an abutment ring 3 which serves as such for the transmission. an axial force introduced into the first race 1 to a flexible blade plate indicated here only in places of a clutch device 4. The two races 1, 2 are designed so that it results in including the rolling elements W cited an oblique bearing ball bearing assembly.

The clutch release device shown here is distinguished by the fact that the second bearing ring 2 is provided in an outer clamping zone of the second rolling element rolling track B2 with a cap-shaped ring section K1. convexly flaring outwardly, this cap-shaped ring section K1 having a cap-shaped ring center Z lying on the abutment axis X. In addition, the abutment ring 3 is provided with of an articulated ring GR made complementary to the above-mentioned cap-shaped ring section K1 and placed on the cap-shaped ring section K1 so that the abutment ring 3 can be tilted with respect to the second ring 2 around the cap-shaped ring center on the abutment axis X. The crown ring section K1 is made 10

so that a conical envelope with a bearing axis KM defined by the angular bearing ball bearing geometry separates the cap-shaped ring section K1 into two annular zones K11, K12 which preferably have in the axial section of stop shown here essentially the same annular zone width Z1, Z2. The first race 1 is formed as a shaped ring made of sheet metal and has a radially inward annular branch or an annular wall section 1a which is connected to a connecting structure AS made here as a sliding sleeve. In the embodiment shown here, the connection of the first bearing ring 1 to the connecting structure AS is carried out so that the first rolling ring 1 is moved radially by the value T1 with respect to the connecting structure. . This connection is obtained by the fact that the inside diameter of the inner opening 1b bordered by the annular wall 1a is greater than the outside diameter of the annular post AS1 passing through the internal opening 1b. The axial locking of the first race 1 on the connecting structure AS or the aforementioned annular tenon AS1 is effected by an annular spring RF which rests in the zone of its inner opening on a folded branch AS2 of the connecting structure AS and thus tends the annular wall lA against a front surface S1 made available by the connecting structure AS.

The intermediate raceway space directed towards the clutch, formed between the first race 1 and the second race 2 is covered by a sealing device Dl. In the embodiment shown here, the sealing device D1 is designed so that it has a separate abutment ring W1 anchored in the second peripheral race 2 and an El elastomer structure vulcanized thereon which forms as such a sealing lip L1 resting on an outer peripheral surface of the first race 1. The rear intermediate space formed between the first race 1 and the second race 2 is sealed. rearwards by a second sealing device D2 which also has a separate abutment ring W2 anchored to the second race 2, pressed in particular therein and a vulcanized elastomer structure E2. The elastomer structure E2 forms a sealing lip L2 which rests in a manner similar to the sealing lip L1 on a rolling zone formed by the outer peripheral surface of the second race. The rolling elements W are guided in the track space B defined between the two bearing rings 1, 2 by a cage device K. The cage device K can be made in particular as a cage with a spherical engagement. It is possible to design the two bearing rings 1, 2 and the cage device K so that a radial guide of the cage device K is also obtained by it. 12

In the embodiment shown here of a clutch release device according to the invention, a sliding material member 5 is placed on the cap-shaped ring section K1 formed by the second bearing ring, which is locked in position. as such on the second race 2 by the folding of the edges 11 indicated here. This sliding material element 5 is made as a composite component and comprises a carrier layer 6 and a layer of sliding material 8 connected by material thereto. With this layer of sliding material 8, the ring-shaped ring surface KF1 for housing the thrust ring 3 or the hinged ring GR, flaring convexly outwardly.

The articulated ring GR which is formed as an integral component of the kind of the thrust ring 3 is designed so that it forms in the area of its inner surface facing the cap-shaped ring section K1 a surface KF2 seat concave and bent complementarily to the ring-shaped ring surface KF1. It is possible through the AS connection structure to link the clutch release device to an actuating member, in particular an actuating rod. Thanks to the articulated housing, undertaken according to the invention of the thrust ring 3, it is possible to compensate for an axial vertical offset of the rest surface of the thrust ring formed by the washer blades of a clutch system. The stop ring 3 forms for this special design of the disengagement stop device and a component made separately with respect to the second bearing ring 2 with a spherical adjustment zone on the articulated ring GR. In order to avoid wear as well as to reduce the adjustment torque, the sliding material element 5 is placed on the second bearing ring 2. This sliding material element 5 preferably consists of a metal carrying part 6 with a sintered bronze coating 8 and inserted PTFE particles. This sliding coating 5 is placed on the second race 2 with a ring-shaped ring section K1 consequently spherically shaped and preferably fixed by complementary shape on this second race 2.

The sliding coating 5 may be made in particular of a web material and rolled or stamped to the desired shape. To increase the form resistance, a separation point or peripheral junction can be connected in particular by welding to the user, by a brazing process and / or by riveting. Thanks to the structure according to the invention of the clutch release device, it is possible to allow for an extremely compact abutment design oblique position compensation at least to a large extent. The disengagement stop device according to the invention can be manufactured economically by relatively simple parts. Thanks to the sliding coating inserted according to the invention between the abutment ring and the second race 2, a particularly easy connection to 14

get and reliable from the thrust ring 3 to the second bearing ring 2 is guaranteed. The clutch release bearing according to the invention is distinguished by a particularly compact structure and by a particularly favorable form of the stop ring with regard to its manufacture as a stamped part in particular C80M. The abutment ring 3 may be optionally subjected to heat treatment and final polishing in the spherical bearing zone. The previous embodiments apply to a large extent in a similar manner to the embodiment shown in Figure 2 of a clutch release bearing according to the invention. The essential difference of this variant clutch release device is that in this embodiment, the second bearing ring is also formed as a molded shaped component and the cap-shaped ring section K1 is formed by an element. of additional ring-shaped ring KE, placed on the second bearing ring 2. This ring-shaped ring element KE can be designed so that by it, the structural resistance of the second bearing ring 2 is still increased. In the exemplary embodiment shown here, the sliding material element 5 sits, similarly to the variant according to FIG. 1, on the ring-shaped ring element KE. It is also possible to directly manufacture the KE ring-shaped ring member in a sliding material, as well as to optionally provide it with holes that are filled with 15

example of PTFE material and thus form the sliding surface KF1 provided for the support of the GR articulated ring directly by the ring-shaped ring element KE.

In FIG. 3, a variant of a clutching step according to the invention is shown, which has a bearing zone 21 designed spherically on the outer ring for a bearing ring 23 with a bearing zone 24. spherically designed. The sliding coating 25 has a metal carrying portion which is provided with a sintered bronze coating 8 and which is integrally locked on the spherical bearing zone of the abutment ring 23. widening of the bearing zone, the abutment ring 23 is provided in the piercing zone with a lining 26. The abutment ring 23 is equipped with fasteners 27 which can engage as such in the zones intermediate springs-spring blades. As an alternative to the projections 4, a separate abutment ring 4 is provided as retaining means for the abutment ring 3. Advantages - the spherical adjustment zone on the outer ring can be manufactured with higher precision by means of the technique grinding, - the wide base of support of the bearing area on the adjusting ring decreases the surface pressure, -single form of safer complementarity of the sliding coating on the stop ring, - compact design, robust, 16

- simple fixing of the stop ring on the clutch spring washer. In the embodiment according to FIG. 4, the clutch release device is designed so that a sliding coating 31 of plastic material is injection-molded on the adjusting ring 23 by forming an anchoring structure, in particular for the anchoring by complementarity of form. The slip coating is preferably made of a high temperature, friction reducing and wear resistant plastic material such as PA46, CF30, PTFE5 or PEEK with slip improving agents such as PTFE or MoS2.

As a retaining means is provided a retaining ring 33 which is engaged by pressure on the inner ring 34 and surrounds by complementary shape, afflicted by a game partially the thrust ring 3. As is apparent from Figure 5, it is it is also possible to make the clutch release bearing so that the sliding liner 41 and the contact area 42 are injection molded of a plastic material in an injection process. In another embodiment, it is possible to provide instead of the retaining ring 43 branches 44 extending radially in the contact area of the washer blades, which cover with projections 45 the spring washers and allow fixing of the thrust ring 3. These branches simultaneously serve as locking means in rotation. As a variant further optimized, it is proposed to manufacture the sliding coating 41 of a particularly low-friction plastic material and the contact area for the spring washers on the abutment ring of a plastic material very resistant to wear in the process injection of several components. Advantages: - fast self-centering of the stop thanks to the branches, - reduction of the number of parts by 10 injection-molded self-fixing, - sliding coatings optimized by stress. As an alternative to the aforementioned coatings, hard material coatings may also be provided depending on the stress in combination with slip improving agents. Alternatively, and for the embodiments illustrated in FIG. 1 or 2, it is possible to provide that the sliding material 5 is force-connected to the bearing ring 2. Similarly, for the embodiments illustrated in FIGS. Figures 3 to 5, it is possible to provide that the sliding material 5 is anchored by force on the articulated ring GR. Of course, the invention is not limited to the embodiments described above and shown, from which we can provide other modes and other embodiments, without departing from the scope of the invention. invention.

Claims (16)

1. Clutch release device with: - a first bearing ring (1) which forms a first rolling element rolling track (B1) and which constitutes the non-peripheral bearing ring, -a second bearing ring (2) forming a second running track for rolling elements (B2) and constituting the peripheral rolling ring, - rolling elements (W) which are received in a track space (B) delimited between the first and second bearing rings (1, 2), and an abutment ring (3) for the transmission of an axial force introduced into the first bearing ring (1) to a clutch device (4), - in which the rolling elements rolling tracks ( B1, B2) formed by the two bearing rings (1, 2) are designed so that it results in including the rolling elements (W) mentioned an oblique bearing ball bearing assembly, characterized in that the second ring (2) is provided in an outer peripheral zone bordering the second rolling element rolling track (B2) with a cap-shaped ring section (K1) convexly outwardly flaring with a center having a cap-shaped ring (Z) located on the abutment axis (X), and - in that the abutment ring (3) has an articulated ring (GR) made complementary to the ring section. cap shape (K1) and is placed on the calotte-shaped ring section e (Kl) so that the stop ring (3) can be tilted with respect to the second bearing ring (2) around the cap-shaped ring center (Z) located on the abutment axis (X ). 2. Clutch release device according to claim 1, characterized in that the cap-shaped ring section (K1) is made such that a conical bearing shaft envelope defined by the ball bearing geometry. in oblique range passes through the cap-shaped ring section (K1). 3. Clutch release device according to claim 1 or 2, characterized in that the first race (1) is formed as a shaped ring made of sheet metal. Clutch abutment device according to at least one of Claims 1 to 3, characterized in that the hinged ring GR) sits by means of a sliding material element (5) on the ring section. cap shape (Kl). 5. Clutch release device according to claim 4, characterized in that the sliding material element (5) is anchored to the second bearing ring (2). 25 6. Clutch release device according to claim 4, characterized in that the sliding material member (5) is anchored by material connection and / or complementarity of form and / or force on the hinged ring (GR). 30 Clutch abutment device according to at least one of Claims 1 to 6, characterized in that the sliding material element (5) is designed as a retaining element for securing the thrust ring ( 3) on the second bearing ring (2). Clutch abutment device according to at least one of Claims 1 to 7, characterized in that the sliding material element (5) is formed as a composite component with a carrier layer (6) and a protective layer (6). sliding material (8), and in that the carrier layer (6) is made of a plastically deformable metal material. Clutch abutment device according to at least one of Claims 1 to 8, characterized in that the sliding material element (5) is bonded by material and / or form or force-fitting to the second ring. rolling (2). 10. Clutch release device according to at least one of claims 1 to 9, characterized in that the conical tip of the conical abutment of the bearing axis is in the region of the center of the ring shaped cap (Z). Clutch abutment device according to at least one of Claims 1 to 10, characterized in that the first bearing ring (1) is integrated in the disengaging stop device so that it can be slightly disengaged. moved in the radial direction of a value (Tl). 12. Disengaging stop device according to at least one of claims 1 to 11, characterized in that a sealing device (D1, D2) 21 is provided to seal a defined slot area between the two rings. rolling (1, 2). Clutch abutment device according to at least one of Claims 1 to 12, characterized in that the sealing device (D1, D2) has a separate stop ring element (3) (W1, W2). and an elastomeric body (E1, E2) bonded thereto with sealing lips (L1, L2). Clutch abutment device according to at least one of Claims 1 to 13, characterized in that a cage device (K) is provided for guiding the rolling elements (W) in the track space for rolling elements (B). Clutch abutment device according to claim 14, characterized in that the cage device (K) is designed so that it is guided in the radial direction by at least one of the bearing rings (1, 2) and / or through the rolling elements (W). 16. Clutch release device according to claim 1 to 15, characterized in that a retaining ring (33) is provided for the retaining means of the stop ring (3).