JP4314160B2 - Release device for pull type clutch - Google Patents

Description

  The present invention relates to a release device, and more particularly to a release device for moving a lever plate mounted on an inner peripheral portion of a diaphragm spring of a pull type clutch in the axial direction.

  The clutch device is a device attached to a flywheel of an engine, and mainly includes a clutch disk assembly and a clutch cover assembly. The clutch disk assembly is mainly composed of a friction coupling portion close to the friction surface of the flywheel, a hub that engages with the transmission input shaft, and a damper mechanism that couples both. The clutch cover assembly includes a clutch cover fixed to the flywheel, a pressure plate disposed adjacent to the friction coupling portion in the clutch cover, and supported by the clutch cover to urge the pressure plate toward the flywheel. It consists of a diaphragm spring.

  The clutch device further includes a release device for operating the inner peripheral portion of the diaphragm spring to connect / release the clutch. The release device has a function of releasing the engagement of the clutch by pulling out the inner peripheral portion of the diaphragm spring to the transmission side or pushing it into the engine side by the release device. The release device has a release bearing that moves in the axial direction by a release lever or the like, and a coupling mechanism that couples the release bearing and a lever plate mounted on the inner peripheral portion of the diaphragm spring. The coupling mechanism includes a wiring provided between the release bearing and the lever plate, and a collar for holding the wiring.

  The wiring is a member for transmitting the load from the release bearing to the lever plate, and is fitted into the annular groove formed in the annular groove of the release bearing and the inner peripheral portion of the lever plate. The collar is a member for holding the wiring so as not to drop off the lever plate when the connecting mechanism is connected / released. The collar is made of, for example, a plate member, and has an annular plate portion and a plurality of claw portions extending therefrom toward the axial engine side. The claw portion is engaged with a plurality of notches formed in the wiring. The annular plate portion of the collar is disposed between the inner peripheral end of the diaphragm spring and the axial direction of the release bearing via axial gaps on both sides.

Prior to connecting the release device, a lever plate is fixed to the inner peripheral end of the diaphragm spring, and a wedge collar is attached to the lever plate while holding the wiring. From this state, the inner race of the release bearing is pushed into the inner peripheral side of the lever plate from the axial transmission side, and the wiring is fitted in the annular groove of the inner race. At this time, the collar has its annular plate portion pressed against the inner peripheral portion of the diaphragm spring and the lever plate from the axial transmission side. Subsequently, when the release bearing is pulled out to the axial transmission side, the wiring is fitted into the annular groove of the lever plate, and the connection of the release device is completed (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 4-84927

  When disassembling the release device, in order to get over the wire ring from the annular groove, it is necessary to insert a tool between the annular plate portion of the collar and the release bearing and apply a load so as to pull them apart. Therefore, the axial clearance between the annular plate portion of the collar and the release bearing needs to be a certain length or less in consideration of the workability of the tool.

  On the other hand, when connecting the release device, the annular plate portion of the collar is pressed against the lever plate toward the axial engine side in order to fit the wiring in the annular groove of the inner race. Therefore, if the axial clearance between the collar annular plate and the inner peripheral end of the diaphragm spring is long, the amount of the collar pawl extending from the lever plate to the axial engine side is large when the release device is connected. Thus, it interferes with the members of the clutch disk assembly.

  To summarize the above, if the collar annular plate portion is brought close to the release bearing, there will be a problem in the clutch connecting operation, and conversely if the collar annular plate portion is brought close to the diaphragm spring, the clutch disassembling work will be problematic. .

  An object of the present invention is to eliminate problems in connection and disassembly work in a release device for a pull type clutch.

A release device for a pull type clutch according to claim 1 , wherein a diaphragm spring inner peripheral end portion is provided for a clutch cover assembly having a pressure plate and a diaphragm spring that elastically urges the pressure plate toward the clutch disk. Is a device for releasing the clutch by pulling out the gear toward the transmission. The release device includes a locking member, a release bearing, a wiring, and a holding member. The locking member is an annular member fixed to the inner peripheral end of the diaphragm spring. The release bearing has an inner race disposed on the inner peripheral side of the locking member. The wiring is disposed between the locking member and the inner race. The holding member is a member for holding the wire ring on the locking member, and an annular portion disposed with a first gap on the axial transmission side with respect to the inner peripheral end portion of the diaphragm spring, and an axis from the annular portion. A plurality of claws extending to the direction clutch side and engaging the wire ring, and a protrusion extending from the outer peripheral edge of the annular portion toward the axial transmission side and having a second gap in the axial direction with respect to the bearing.

In this release device, the collar has a protrusion extending from the outer peripheral edge of the annular portion toward the axial transmission side and having a second gap in the axial direction with respect to the bearing. The axial clearance can be set regardless of the axial position of the collar annular portion. Therefore, the axial gap between the collar and the release bearing can be shortened without increasing the axial gap between the annular portion and the locking member.

In a release device for a pull type clutch according to a second aspect, the second gap is smaller than the first gap in the first aspect .

Pull type clutch release device according to 請 Motomeko 3 resides in that in Claim 1 or 2, the protrusion is inclined such that the tip is positioned on the outer peripheral side of the root end.

In the release device for a pull type clutch according to a fourth aspect , in any one of the first to third aspects, a plurality of protrusions are formed side by side in the circumferential direction.

In a release device for a pull type clutch according to a fifth aspect , in any one of the first to fourth aspects, the protrusion has a circumferential angle of 10 degrees or more.

  In the present invention, since the collar has the protrusion, the axial gap (second gap) between the collar and the release bearing can be set regardless of the axial position of the annular portion of the collar. Therefore, the axial gap (second gap) between the collar and the release bearing can be shortened without increasing the axial gap (first gap) between the annular portion and the locking member. As a result, in the release device for the pull-type clutch, problems are unlikely to occur in connection and disassembly operations.

1. Overall Structure of Clutch FIG. 1 shows a pull type clutch in which an embodiment of the present invention is adopted. Here, OO is a center line. In the figure, this pull type clutch mainly has a clutch cover assembly 1, a clutch disk assembly 2 and a release device 3.

  The clutch cover assembly 1 includes a clutch cover 6 fixed to the engine-side flywheel 5, a pressure plate 7 disposed inside the clutch cover 6, and a diaphragm spring 8. The outer periphery of the diaphragm spring 8 is supported by the clutch cover 6, and the intermediate portion in the radial direction presses the pressure plate 7 toward the clutch disk assembly 2.

  The clutch disk assembly 2 is configured such that the friction facing of the outer peripheral portion thereof is sandwiched between the flywheel 5 and the pressure plate 7. The front end portion of the main drive shaft 9 on the transmission side is spline-engaged with the hub at the center of the clutch disc assembly 2. The clutch disk assembly 2 further has a damper mechanism.

2. Release Device Structure As shown in FIG. 2, the release device 3 includes a release bearing 12, a wire ring 14, a wedge collar 15, and a lever plate 16.

  The release bearing 12 is a member that is driven in the axial direction by a release fork (not shown), and includes an inner race 17, an outer race 18, and a plurality of rolling elements 19. The inner race 17 has a cylindrical portion 17a that extends further to the axial engine side from the rolling elements 19 and the outer race 18, and an annular fitting groove 17b is formed on the outer periphery of the tip portion. The fitting groove 17b generally faces outward in the radial direction. A tubular member 29 is fixed to the outer race 18. The tubular member 29 has a flat annular portion 29 a located on the engine side of the outer race 18 in the axial direction.

  The wire ring 14 is an annular member having a circular cross section divided at one place, and has a plurality of notches 14a at equal intervals in the circumferential direction on the inner periphery. The cross section of the portion where the notch 14a is formed is semicircular. The inner peripheral side of the wire ring 14 is fitted in the fitting groove 17b at the tip of the inner race 17.

  As shown in FIGS. 3 and 4, the wedge collar 15 includes an annular flange portion 15a having a certain length in the radial direction, and a plurality of wedge collars 15 protruding from the inner peripheral edge of the flange portion 15a toward the axial engine side. A first claw 20 and a second claw 21 are provided. The flange portion 15 a is disposed with a gap between the inner peripheral end portion 8 a of the diaphragm spring 8 and the release bearing 12 in the axial direction. A first axial gap 25 is formed between the flange portion 15a and the inner peripheral end portion 8a (more precisely, the locking portion 22b of the support plate 22), and its axial length is S1. S1 is, for example, 8 to 12 mm. The 1st nail | claw 20 is provided in the space | interval same as the space | interval of the circumferential direction of the notch 14a of the wire ring 14, and is inserted in the notch 14a, as shown in FIG. The wire ring 14 is concentrically supported by the wedge collar 15 by the first claw 20. Furthermore, the 1st nail | claw 20 has the bending part 20a bent in the radial direction outward at the front-end | tip part. The bent portion 20a supports the engine side of the wire ring 14 so that the wire ring 14 does not fall off from the first claw 20 in the axial direction. Two second claws 21 are formed between the adjacent first claws 20, and as shown in FIG. 6, the second claws 21 are in contact with the rear part in the axial direction of the portions where the notches 14 a of the wire ring 14 are not formed. It is close. In FIG. 6, a slight axial gap 27 is secured between the tip of the second claw 21 and the wire ring 14. The length S3 of the axial gap 27 is preferably 0.4 mm or less. Thus, the wire ring 14 is held immovably in the axial direction by the bent portion 20a of the first claw 20 and the tip of the second claw 21. Although the second claw 21 extends straight in the axial direction, the first claw 20 is inclined so that the tip is located on the inner peripheral side from the rear end.

  The flange portion 15a of the wedge collar 15 has an annular drawing portion 15b formed so as to protrude toward the release bearing 12 side. By this drawing portion 15b, the rigidity of the flange portion 15a is improved.

  Furthermore, a plurality of protrusions 23 extending to the axial transmission are formed on the outer peripheral edge of the wedge collar 15. The protrusion 23 extends in the axial direction and is inclined so that the tip is positioned on the outer peripheral side from the root end. However, the protrusion 23 may be inclined such that the tip is located on the inner peripheral side from the root end, or may extend in parallel to the axial direction. Yes. The tip of the protrusion 23 faces the annular portion 29 a of the cylindrical member 29 of the release bearing 12. A second axial gap 26 is secured between the protrusion 23 and the release bearing 12, and its axial length is S2. S2 is shorter than S1, for example, 2.0 mm. S2 is preferably in the range of 1.0 to 4.0 mm. The protrusions 23 are divided in the circumferential direction by the grooves 24. In this embodiment, the grooves 24 are formed at intervals of 45 degrees, and the circumferential angle of each protrusion 23 is, for example, 42 degrees. In addition, it is preferable that the circumferential direction angle of the protrusion part 23 is 10 degrees or more. In addition, the protrusion part 23 may be a cylinder shape continuously in the circumferential direction. In that case, the rigidity of the protrusion is increased and the function is improved.

  As shown in FIG. 2, the lever plate 16 is attached to the inner peripheral end of the diaphragm spring 8 by a support plate 22. Specifically, the lever plate 16 includes a flange portion 16a and a cylindrical portion 16b extending from the flange portion 16a toward the axial engine side. On the other hand, the support plate 22 has an annular main body 22a that abuts the axial engine side surface of the inner peripheral end portion 8a, and a plurality of locking portions 22b formed to protrude in the axial direction from the outer peripheral edge of the annular main body 22a. ing. The locking portion 22b extends through the notch 16d formed in the flange portion 16a and is further bent toward the inner peripheral side so as to contact the surface on the axial transmission side of the inner peripheral end portion 8a. As described above, the inner peripheral end portion 8a of the diaphragm spring 8 is sandwiched between the flange portion 16a of the lever plate 16 and the annular main body 22a of the support plate 22, and the lever plate 16 and the inner peripheral end portion 8a of the diaphragm spring 8 are connected. ing.

  On the inner peripheral surface of the cylindrical portion 16b of the lever plate 16, as shown in FIG. 3, an annular groove 16c opened to the axial engine side is formed. The annular groove 16c has a wall surface facing the axial engine side. The outer peripheral portion of the wire ring 14 is in contact with the annular groove 16c from the engine side in the axial direction.

  With such a configuration, the inner peripheral end portion 8 a of the diaphragm spring 8 is connected to the cylindrical portion 17 a of the inner race 17 via the lever plate 16 and the wire ring 14.

3. Release Operation Next, the release operation of the embodiment will be described.

  By operating a clutch pedal (not shown), the tip of the release fork moves to the axial transmission side. Thereby, the release bearing 12 also moves to the axial transmission side. Then, the cylindrical portion 17a of the inner race 17 moves the inner peripheral end portion 8a of the diaphragm spring 8 to the axial transmission side via the wiring 14 and the lever plate 16. As a result, the pressure on the pressure plate 7 by the diaphragm spring 8 is released. As a result, the pressure plate 7 moves rearward and the clutch disc assembly 2 is separated from the flywheel 5.

4). Next, disassembly / assembly work of the release device 3 will be described.

  When disassembling, as shown in the lower half of FIG. 2, the tip of the tool 30 is inserted into the second axial gap 26 between the tip of the projection 23 of the collar 15 and the release bearing 12, and both members are moved in the axial direction. A load is applied to leave. As a result, the wire ring 14 is detached from the groove 17b of the inner race 17. In addition, since the 1st nail | claw 20 and the 2nd nail | claw 21 of the wedge collar 15 hold | maintain the wire ring 14 in the axial direction, the wire ring 14 does not drop from the wedge collar 15. FIG. In the above operation, since the second axial gap 26 is set sufficiently small, the disassembly workability is very good.

  Before connecting the release device 3, as shown in FIG. 7, the lever plate 16 is fixed to the inner peripheral end 8 a of the diaphragm spring 8, and the wedge collar 15 holds the wire ring 14 and the lever. Attached to the plate 16. From this state, the inner race 17 of the release bearing 12 is pushed into the inner peripheral side of the lever plate 16 from the axial transmission side, and the wire ring 14 is fitted into the fitting groove 17 b of the inner race 17. At this time, the flange 15a of the collar 15 is pressed against the inner peripheral end 8a of the diaphragm spring 8 and the lever plate 16 from the axial transmission side. Next, when the release bearing 12 is moved to the axial transmission side, the wire ring 14 is fitted into the annular groove 16c of the lever plate 16, and the connecting operation is completed. In the above operation, the first and second claws 20 and 21 of the wire ring 14 and the wedge collar 15 do not protrude to the axial engine side so much from the lever plate 16 and the like, so that interference with the clutch disk assembly 2 is unlikely to occur.

  In the release device 3, the wedge collar 15 has a protrusion 23 that extends from the flange portion 15 a toward the axial transmission side and is disposed with a second axial clearance 26 in the axial direction with respect to the release bearing 12. The second axial gap 26 between the collar 15 and the release bearing 12 can be set regardless of the axial position of the flange portion 15a of the wedge collar 15. Therefore, the axial gap between the collar 15 and the release bearing 12 can be shortened without increasing the axial gap between the flange portion 15a and the lever plate 16 or the like.

  As mentioned above, although one embodiment of the clutch device according to the present invention has been described, the present invention is not limited to such an embodiment, and various changes and modifications can be made without departing from the scope of the present invention. In particular, the present invention is not limited to the specific length values described above.

The longitudinal cross-sectional view of the pull type clutch by which one Embodiment of this invention was employ | adopted. The longitudinal cross-section fragmentary view of the release apparatus of the said embodiment. The top view of a wedge color. It is IV-IV sectional drawing of FIG. 3, and is a longitudinal cross-sectional view of a wedge collar. The figure which shows the engagement state of a wedge collar and a wiring. The figure which shows the engagement state of a wedge collar and a wiring. The longitudinal cross-sectional view which shows the state before the connection of a release apparatus.

3 Release device 8 Diaphragm spring 12 Release bearing 14 Wire ring 15 Wedge collar (holding member)
15a Flange part 16 Lever plate (locking member)
20 first claw 21 second claw 23 protrusion

Claims (5)

To release the clutch by pulling out the inner peripheral end of the diaphragm spring to the transmission side with respect to a clutch cover assembly having a pressure plate and a diaphragm spring that elastically biases the pressure plate toward the clutch disk. Release device for pull type clutch
An annular locking member fixed to the inner peripheral end of the diaphragm spring;
A release bearing having an inner race disposed on the inner peripheral side of the locking member;
A wiring disposed between the locking member and the inner race;
An annular portion that is a member for holding the wiring ring on the locking member, and is disposed with a first gap on the axial transmission side with respect to an inner peripheral end portion of the diaphragm spring; A plurality of claws that extend toward the directional clutch and engage with the wire ring; a protrusion that extends from the outer peripheral edge of the annular portion toward the axial transmission side and is disposed with a second gap in the axial direction with respect to the bearing; A holding member having
Release device for pull type clutch equipped with The release device for a pull-type clutch according to claim 1, wherein the second gap is smaller than the first gap . The pull-type clutch release device according to claim 1 or 2 , wherein the protrusion is inclined such that a tip is positioned on an outer peripheral side from a root end. The release device for a pull type clutch according to any one of claims 1 to 3 , wherein a plurality of the protrusions are formed side by side in the circumferential direction. The release device for a pull type clutch according to any one of claims 1 to 4 , wherein the protrusion has a circumferential angle of 10 degrees or more.

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