FR2926617A1 - CLUTCH FIT INSTALLATION. - Google Patents

Abstract

Installation comprising a first bearing ring (1) formed as a flat ring forming a first circulation surface (B1), a second bearing ring (2) also as a flat ring rotating about the bearing axis (X) and forming a second circulation area (B2). The first surface (B1) and the second surface (B2) are without axial overlap.The rolling members (W) housed in the circulation volume (B) between the first (1) and the second bearing ring (2), have a cage (3) for guiding.A clutch abutment (4) constitutes a bearing surface (KF) and is pressed axially against the second bearing ring (2) by a cap-like articulation (KG ) so that the stop (4) can tilt around a tilting center (Z) located bearing axis (X).

Description

FIELD OF THE INVENTION The present invention relates to a clutch abutment installation comprising a first bearing ring, a second bearing ring, rolling members housed in the circulation volume defined between the two bearing rings as well as a bearing ring. cage to guide the running gear in this volume of traffic. The invention particularly relates to a clutch abutment installation which remains reliable for a long period of operation during which it is subjected to high operating stresses. State of the art DE 724 51 41 U1 discloses a self-centering clutch abutment with a rolling bearing having a first and a second bearing ring and a centering ring. The centering ring is pressed against the inner ring of the rolling bearing by means of a ring-shaped hinge. DE 101 14 846 A1 also describes a self-centering clutch abutment installation with a roller bearing fixed to a sliding sleeve and a clutch abutment bearing against the rolling bearing via a hinge. annular cap. The annular cap hinge is provided with a sliding coating made of a plastic material and hooked against the annular crown segment of the clutch abutment. OBJECT OF THE INVENTION The present invention aims to develop a clutch abutment installation, more economical manufacturing and a long life while having advantageous mechanical operating characteristics, including high rigidity. DESCRIPTION AND ADVANTAGES OF THE INVENTION For this purpose, the invention relates to a clutch abutment installation comprising: a first bearing ring made in the form of a flat ring and forming a first circulation surface area; rolling members, - a second bearing ring also produced in the form of a flat ring and representing the rolling ring rotating about the bearing axis and forming a second surface area of rolling bodies circulation, the first circulation surface area and the second circulation surface area extending without axial overlap in axial regions axially spaced from each other, - the running gear being housed in a traffic volume defined between the first bearing ring and the second bearing ring, - a cage for guiding the rolling members in the circulation volume, and - a clutch abutment for constituting a bearing surface the clutch abutment being pressed axially against the second race by means of a cap-shaped ring joint so that the clutch abutment can tilt around a tilting center which is in the area of the bearing axis. It is thus possible, advantageously, to achieve a very rigid clutch stop installation, and which, for the support ring and the ring-shaped ring joint, has a relatively large axial volume, the cap ring-shaped hinge being supported in a very rigid manner in the axial direction. The concept according to the invention also makes it possible to develop different clutch abutment variants in the manner of a construction toy because, due to the reduced axial size of the rolling bearing, a volume of construction is available. residual, important for different bearing ring constructions and ring-shaped ring joints. The integrated flat bearing according to the invention in the clutch abutment installation can be made particularly advantageously as a permanent lubrication bearing and also makes it possible to ensure a sufficient lubricant supply during a long operating period. thanks to the lubricating agent stored in the immediate vicinity of the running gear.

According to a particularly advantageous embodiment of the invention, the clutch abutment installation is designed so that the annular hinge in the form of a cap comprises a first annular cap structure attached to the second race. The attachment of this ring-shaped ring structure to the second race ring can be achieved in particular by pressing an annular spacer of the cap ring-shaped structure in an inner peripheral zone of the second bearing ring. The inner surface preferably formed by the inner peripheral zone of the second bearing ring directly centers the cap-shaped ring structure at the level of the second race. Alternatively or in combination with this means, it is also possible to ensure the centering of the first ring-shaped ring structure and, if appropriate, also the fixing of this structure to the second bearing ring by a connection by force. or by the form having different assembly or bonding geometries. Preferably, the cap-like ring structure is made to rest on the frontal surface area of the second race and thus directly abut the front surface of the second race in the axial direction. , in a very rigid way. The first ring-shaped ring structure may be a shaped sheet metal part or in particular a composite plastic part. In particular in the production of the first ring-shaped ring structure as a composite plastic component, it is possible to produce the actual cap-shaped annular surface of the annular cap structure constituting the first segment of the component in a plastic material and to form the plastic segment preferably only for the geometry of the cap-shaped ring also representing a smooth bearing structure and thus to have a sufficiently light operating support for the support ring. The first cap-shaped ring structure may have a global geometry providing a cap-shaped ring surface convex with respect to the clutch bearing surface. In this embodiment of the cap-shaped ring structure, the tilting center is in the area not located on the rolling bearing side of the clutch installation. Alternatively, it is also possible to make the cap-shaped ring structure to have a cap-shaped ring surface, domed recess, concavely with respect to the second race, i.e. say a shell-shaped surface. In this variant of the cap-shaped ring structure, the tilting center is located in an axial zone occupied by the tilting installation, that is to say in an axial zone situated in front of the clutch abutment. . The crown ring-shaped hinge, attached to a rolling bearing of extremely short axial construction, and formed of two flat rings, is advantageously designed for its geometric properties so that the distance from the tilting center, measured in the direction of the bearing axis, corresponding to the radial surface along the bearing axis and surrounding the running chamber of the running gear, to at least 30% of the radius of the path in the running volume of the running gear .

The nominal pressure angle is preferably in a range between 35 ° and 55 ° and preferably 45 °. The cap ring-shaped hinge attached to the rolling bearing formed by flat rings preferably comprises a second cap-shaped ring structure located on the first cap-like ring structure so that the second structure can be tilted. enough relative to the first around the tilting center Z to compensate for misalignment. This second ring-shaped ring structure can directly form the clutch abutment. It is also possible to press against this ring-shaped ring structure, other annular elements that further improve the transmission of clutch actuation forces to the associated clutch installation. The first cap ring structure is adapted to surround the outer wall area of the second race. In this wrapped area, one can have in particular the sliding surfaces of the cap, necessary to support the second cap-shaped structure. According to a particular characteristic of the present invention, the clutch abutment in the form of a flat disk axial bearing is furthermore fixed to a support structure in such a way that the rolling bearing can move sufficiently to the support structure in the radial direction to compensate for misalignment. The concept according to the invention of the fixing of a cap-shaped ring joint has an axially outer rolling bearing, of very short construction and as strong as possible and the additional offsets of the rolling bearing are such that their positions can be slightly displaced relative to the support structure, in the radial direction and form a disengaging installation having a particularly advantageous mechanical operating behavior. The support structure mentioned above can be made in particular as a sliding sleeve or at least as a sleeve element attached to a sliding sleeve.

According to another characteristic of the invention, an annular flap is connected to the second bearing ring rotating at the same time and it overlaps and covers the circulation gap that remains between the first race and the second race. In the attacking zone not facing the second bearing ring, this annular cover may comprise radial shrinkage further improving the encapsulation of the rolling bearing. This annular cover can further protect against loss, and by the second bearing suspension it is fixed captively to the first race. The fixing of the annular cover to the second race ring is achieved in particular by teeth, mortises and crimped structures. Drawings The present invention will be described below in more detail with the aid of an embodiment shown in the accompanying drawings in which: - Figure 1 is an axial section showing the structure of the stop installation of clutch according to the invention comprising a hinge ring shaped cap supported against a rolling bearing double ring, very rigid axially and a fixed rolling ring, guided in a sliding manner radially, - Figure 2 is a view axial section showing the structure of a second variant of a clutch abutment installation according to the invention comprising a hinge ring ring-shaped center-facing, applied frontally and a contact ring for the pawls of the diaphragm pressed against it, and FIG. 3 is an axial sectional view showing the structure of a third variant of an axial bearing according to the invention which forms a surface concave nnulaire on the ring-shaped cap mounted on the bearing ring rotating with it. DETAILED DESCRIPTION OF EMBODIMENTS The clutch abutment according to FIG. 1 comprises a first rolling ring 1 made in the form of a relatively flat ring and forming a circulation surface area B1 for rolling members. The clutch abutment installation further comprises a second bearing ring 2 also formed as a flat ring and constituting the circulation ring rotating around the bearing axis X. The second bearing ring 2 forms a second zone of rotation. circulation area B2 for the running gear. The first circulation surface area B1 of the rolling members and the second circulation surface area B2 of the rolling members extend in axially spaced regions apart from each other in the axial direction without overlapping. In the embodiment shown, the two circulation surface areas B1, B2 of the rolling members are flat annular grooves facing towards each other, not overlapping axially and axially spaced apart from one another. 'other. The clutch abutment according to the invention further comprises rolling members W housed in the circulation volume B defined between the first race 1 and the second race 2; these rolling members are balls. The clutch abutment installation further comprises a cage 3 for guiding the rolling members W in the circulation volume B and a clutching ring 4 forming the clutch bearing surface KF.

The clutch abutment installation shown is characterized in that the clutch ring 4 is axially supported by means of a ring-shaped ring joint KG against the second race 2 so that the clutch ring 4 can be tilted around a tilting center Z. This center is located at the level of the bearing axis X in particular exactly on this bearing axis X. In the case of the embodiment shown, the ring joint in the form of a cap KG comprises a first cap-shaped ring structure 5 fixed to the second race 2. In the present example, the first cap-shaped ring structure 5 is centered on the inner peripheral zone 6 of the second race ring 2. The first ring-shaped ring structure 5 is furthermore made to come on a frontal surface area 7 of the second race 2 and thus be supported in a very rigid in the axial direction. In the embodiment shown, the first cap-shaped ring structure 5 is a composite part, in particular a plastic composite part comprising an annular core 8 on which is molded a cap head segment 5b made of a plastics material. having good sliding properties. The crown head segment 5b forms a crown ring surface 5 convexly convex with respect to the clutch bearing surface KF and the outer edge; the center of the sphere of this surface in the form of a cap ring 5c is the center of tilting Z which, as it appears, is in the axial zone not facing the clutch installation (not detailed here) it is ie behind the actual clutch stopper. The clutch ring 4 of the embodiment shown is a relatively massive annular piece and its inner surface not facing the clutch bearing surface KF directly forms the concavely curved bearing surface located on the surface. 5c of ring-shaped cap, complementary to this surface 5c. In the present embodiment, the first bearing ring 1 is fixed to a support structure 9 so as to be able to move relative thereto, in the radial direction, a measure sufficient to compensate for a shift. alignment. In the present exemplary embodiment, the support structure 9 is a sheet metal part obtained by deep drawing, in particular a shoulder ring which is supported in a manner known per se on a sliding sleeve preferably made of plastic material while being hooked to it. muff. The support structure 9 forms an annular spacer 10 against which the inner peripheral zone of a Belleville spring 11 rests. This Belleville spring 11 is clamped at the region of the inner edge of the first race 1 against a surface front end constituted by the support structure 9. Between the inner peripheral edge region of the first bearing ring 1 and an outer peripheral surface of a sleeve segment 9a of the support structure 9, the radial gap has been left R, which, as indicated, allows a slight radial displacement of the first race 1 with respect to the support structure 9. This attachment according to the invention of a ring-shaped ring articulation KG on a rolling bearing of axial length extremely short and very rigid in the axial direction, and which is furthermore fixed in such a way as to be able to move slightly in the radial direction to the structure support 9, allows for a clutch abutment installation which is surprisingly characterized by an excellent behavior mechanical astonishment; moreover it can be realized in the form of a construction kit by equipping the rolling bearing with ring, according to the different variants of clutch abutment, according to a short construction in the axial direction. In the embodiment shown here, an annular cover 12 is attached to the second race 2. This cover covers as such the circulation gap S1 remaining between the first race 1 and the second race. 2. In the present example, the annular cover 12 is blocked by depression and clearance 14 at the second race 2 between the inner peripheral zone of the annular cover 12 and the outer peripheral zone of the segment of the first race ring 1 in the vicinity of the annular cover 12, there remains a sufficiently large circulation gap S2. The annular cover 12 ensures not only the protection of the rolling bearing against fouling but also the captive fixing of the second race 2; thus globally there is a reliable assembly of the cap-shaped ring joint to the first race ring 1. The annular cover presented here is further provided with a ring-fixing segment 50 provided with a plurality of retaining branches 51 These holding arms 51 are formed to provide an assembly fastener which secures the clutch ring 4 to the crown ring-shaped ring joint KG without unacceptably limiting the possibility of tilting of the clutch ring 4. The The explanations given above also apply to the embodiment shown in FIG. 2. The components of the clutch abutment of FIG. 2 corresponding to those of the clutch abutment of FIG. 1 bear the same references. The main difference between the clutch abutment of FIG. 2 with respect to the clutch abutment described above with the help of FIG. 1 resides in the shape of the cap-shaped ring joint KG. In the present exemplary embodiment, the crown ring-shaped hinge KG comprises a first cap-shaped ring structure 5a 'which is a shaped sheet metal part and carrying the second bearing ring 2. The first structure The cap-like ring 5a 'is formed so that its outer edge region overlaps the outer peripheral edge of the second race 2 in the radial direction with a plateau edge set back from the outer edge of the first race ring. rolling. In this peripheral zone which overlaps the second bearing ring 2, the outer surface not facing the circulation volume B forms a hinge surface 5c cap convex convexly outwardly. This cap-like base surface carries a sliding coating 20 attached to the second cap ring structure 21. The second cap-shaped ring structure 21 is part of an assembly having the function of a clutch abutment. The second ring-shaped ring structure 21 integrally carries an annular element 4 'forming the bearing surface KF. In the area of its front surface KF facing the clutch installation not detailed here, the annular element 4 'may have a profiled shape for firstly making a rotation lock and secondly to transmit in particular advantageously, the forces on the actuators not shown in detail here, the associated clutch installation. The smooth coating 20 is preferably a smooth, high temperature resistant material, especially a slip material or smooth, metallic material. This sliding coating 20 may be fixed by a connection by the material, in particular by brazing or welding, to the inner peripheral surface of the second cap-shaped ring 21.

In this embodiment, there is also provided an annular cover 12 which rotates with the second bearing ring 2. Unlike the first embodiment according to FIG. 1, the integration of this annular cover 12 into the abutment of FIG. The clutch according to the invention is made by means of an annular segment which does not appear here but which is produced by the outer peripheral zone of the cap-like articulation ring 5c. As in the embodiment of Figure 1, in this embodiment there is provided a fixing ring 50 provided with the branches 51 which fix the clutch ring 4 'or the ring-shaped cap 21 which carries it to the clutch thrust installation.

The first bearing ring 1 is fixed in the same way as in the embodiment of FIG. 1 to a support structure 9 so that it can be moved radially in the radial direction with respect to a sliding sleeve 22. The sliding sleeve 22 is preferably made of a plastics material and forms a flange surface 23 against which the back region of the first bearing ring 1 not facing the circulation volume B is applied, if necessary with the interposition of the support structure 9.

The first ring-shaped ring structure 5a 'also forms an annular edge 5d which on the one hand ensures the centering and hooking of the first cap-shaped ring structure 5a to the second race 2 and which on the other hand also allows the attachment of an attached ring 23. This attached ring 23 has a section preferably like that shown in Figure 2. This ring 23 provides on the one hand a particularly effective coverage of the circulation volume B relative to to the inner peripheral zone of the rolling bearing and secondly it realizes a guide structure guided in the radial direction by the cage 3 serving to guide the rolling members W. As the cage rotates relative to the ring reported only about at half the speed of rotation, the cage is pulled and thus has a positive bearing friction. The insert ring 23 may also be attached to a porous body 24 made of nonwoven or other material, which provides additional sealing of the circulation volume B with respect to the inner peripheral zone of the bearing and also makes it possible to complete the sealing of the circulation volume B relative to the inner peripheral zone of the bearing and to improve the lubrication of the bearing segment of the Belleville spring 11 against the inner surface of the first bearing ring 1 facing the Belleville spring 11. This annular cap structure can be formed in one piece, directly on the bearing ring 2. Figure 3 shows a third variant of a clutch abutment according to the invention. In the case of this clutch abutment, the ring-shaped ring joint KG is designed so that the center of tilting Z of the clutch ring 4 is on the bearing axis X in the zone of the clutch. clutch installation not detailed here. The first cap-like ring structure 5a is formed to provide a cap-shaped ring surface 5c concavely curved inwardly with respect to the second bearing ring 2. This cap-like ring surface 5c This smooth coating may be made of a plastics material or preferably of a metal bearing bearing material resistant to relatively high temperatures. The first cap-shaped ring structure 5a is a shaped sheet metal part centered on the second bearing ring 2. The centering according to this embodiment is also effected by means of an annular edge 5d which is an integral part of the first ring-shaped ring structure 5a. This first structure 5a is a workpiece obtained by deep drawing, having undergone at least locally machining with chip removal. The axial support of this first ring-shaped ring structure against the second race 2 is via a peripheral surface segment 5e, interior and a bearing surface segment 5f, exterior , located relatively far outward in the radial direction. For the remainder, in this embodiment, the rolling bearing formed by two relatively flat bearing members extending substantially only in the radial direction is fixed to the support structure 9 so that the first bearing ring 1 may move slightly in the radial direction relative to the support structure 9 to compensate for misalignments. The concept according to the invention allows for a clutch abutment characterized by a self-adjusting effect particularly good and also offering a relatively high axial stiffness. The clutch abutment according to the invention can be manufactured economically by converting an axial bearing formed by flat bearing rings. In the case of the clutch abutment according to the invention, it is a self-adjusting clutch abutment, manufactured in a relatively economical manner in the form of an axial ball bearing with an installation of automatic adjustment. The clutch abutment installation according to the invention can be manufactured from a basic bearing provided with self-centering equipment, also for other areas of application in which the self-centering of the abutment 'clutch is enough. With the aid of an additional intermediate ring comprising a spherical adjustment zone and an adjusting ring, the invention makes it possible to perform a self-adjusting function. The bearing according to the invention using, for example, a nonwoven ring as a lubricant reserve is sufficient for minimum lubrication with a relatively small amount of lubricating agent. The bearing according to the invention allows a captive attachment via a sealing cover attached to the outer periphery. In this embodiment, there is provided a securing ring segment 50 carrying a plurality of securing branches 51. These securing branches 51 are formed to form a captive safety protecting the clutch abutment 4 on the shaped annular joint. of cap KG without unduly limiting the possibility of tilting of the clutch ring 4. The fixing ring segment 50 is connected to the second bearing ring 2 via the annular structure of the cap 5a. A coating can be attached to the intermediate ring by overmolding. In addition, an inner seal can be made by a non-woven ring.

The clutch abutment according to the invention is simply manufactured economically as a toy building system. In the case of the clutch abutment according to the invention, there is a direct dynamic short-circuit which guarantees high rigidity to the clutch abutment, particularly in its embodiment for conventional control by means of a control lever. walkout. The abutment or bearing according to the invention is characterized by a particularly reliable and effective sealing vis-à-vis the lubricant outlet and fouling from the outside. In the variant of Figure 1, the smooth coating or sliding coating is fixed to the adjusting ring by a connection by force or by the shape including a sliding material such as a Perma sliding material or a plastic material, these materials being overmolded. The ring for guiding the cage receives at the same time the seal formed by the non-woven ring and a sealing seal to prevent fouling from the outside. The clutch abutment includes a plastic drive disc. The clutch abutment according to the invention is characterized by an axially short construction and by components that are simply manufactured, particularly by stamping or deep drawing. In the case of the clutch abutment according to Figure 2, the rolling ring is movable in one piece with the spherical adjusting cap. This makes it possible to obtain a very strong embodiment for clutch stops with conventional lever control. In the case of the variant of Figure 2, there is further provided a particularly compact construction by mounting the self-centering installation on the outer diameter of the bearing ring installed integrally in rotation. In the embodiment of Figure 2, there is also an autoregulated installation for which the spherical adjustment range has a relatively small active gap relative to the axis of rotation. The adjusting ring then serves as a support for the smooth plastic coating. In addition, in the embodiment of Figure 2, the outer movable ring and the cap are made in one piece.

For optimal use of the available space, it is proposed to make the bearing ring, mobile, as a part manufactured in the press, continuously or as a piece of fine cast iron and the machiner in finishing with chip removal. The adjusting ring is preferably provided with a coating of a very strong plastic material with low friction in the spherical adjustment zone and / or the contact area of the tabs of the Belleville spring of the clutch. As a variant, it is possible to equip the coating in the spherical adjustment zone with a smooth coating of sintered bronze balls on a backing support St fixed for example by a connection by the material, by laser welding.

This makes it possible to give the bearing very high rigidity thanks to optimally adapted annular sections and a relatively large volume of lubricating agent reserve. According to another variant of the invention, this bearing is also realized for conventional actuations using the clutch lever.

In addition, in the various embodiments presented, the adjusting rings with interchangeable plastic disks and rotating fixing struts, can be made for rapid self-centering, with a support tachometer, flat for the diaphragm pawls and curved pawl ends, or the support contours in segmented bulge form for the diaphragms, may be manufactured with straight pawl ends for the diaphragm.

Claims (1)

1 °) clutch stop installation comprising: - a first bearing ring (1) made in the form of a flat ring and forming a first circulation surface area (B 1) of rolling members, second bearing ring (2) also made in the form of a flat ring and showing the rolling ring rotating around the bearing axis (X) and forming a second circulation surface area (B2) of rolling, the first zone of 1 o circulation surface (B 1) and the second circulation surface area (B2) extending without axial overlap in axially spaced axially apart regions, bearing (W) being housed in a circulation volume (B) defined between the first race (1) and the second race (2), - a cage (3) for guiding the running gear (W) in the circulation volume (B), and - a clutch abutment (4) to constitute a surface of ap the clutch abutment (4) being pressed axially against the second bearing ring (2) by means of a cap-shaped ring joint (KG) so that the abutment clutch (4) can swing about a tilting center (Z) which lies in the region of the bearing axis (X). 2) clutch abutment installation according to claim 1, characterized in that the cap-shaped ring joint (KG) comprises a first cap-shaped ring structure (5) attached to the second ring of Bearing (2). 3) clutch abutment installation according to claim 2, characterized in that the first cap-shaped ring structure (5) is centered by means of an inner peripheral zone (6) of the second ring of bearing (2). 4 °) clutch stop arrangement according to claim 2 or 3, characterized in that the first cap-like ring structure (5) is pressed against a frontal surface area (7) of the second race ( 2). 5 °) clutch abutment installation according to claims 2 to 4, characterized in that the first ring-shaped ring structure (5) is a composite component. 6 °) Clutch stop installation according to claims 2 to 4, characterized in that the first cap-like ring structure (5) is a shaped sheet metal part. Clutch abutment installation according to claims 2 to 6, characterized in that the first cap-shaped ring structure (5) constitutes a convex surface towards the clutch bearing surface (KF). ) and the tilting center (Z) is in the axial zone behind the clutch abutment in the clutch system. Clutch abutment arrangement according to claims 2 to 6, characterized in that the first cap-shaped ring structure (5c) constitutes an annular surface curved concavely with respect to the second race ( 2), and the tilting center (Z) is located in an axial zone of the clutch system in front of the clutch abutment. 359 °) Clutch stop arrangement according to claims 2 to 8, characterized in that the cap-shaped ring joint (KG) comprises a second cap ring-shaped structure (4, 21) supported on the first ring-shaped ring structure (5). 10 °) Clutch stop installation according to claim 9, characterized in that the second ring-shaped ring structure constitutes the clutch abutment (4). Clutch abutment installation according to claims 2 to 10, characterized in that the first cap-like ring structure (5) is constructed so that the sliding surface area of the cap surrounds the edge region. outside the second race (2). Clutch stop device according to Claim 1, characterized in that the first bearing ring (1) is fixed to a supporting structure (9) so that it can move relative to the supporting structure (9). in the radial direction, of a measurement sufficient to compensate for a misalignment. 13 °) clutch stop installation according to claim 12, characterized in that the support structure (9) is fixed to a sliding sleeve. 14 °) clutch stop installation according to claim 1, characterized by an annular cover (12) covering as such the circulation gap (S 1) remaining between the first race (1) and the second bearing ring (2). 515 °) clutch stop installation according to claim 14, characterized in that the annular cover (2) is fixed to the second race (2). 10