JP5312300B2 - Play adjustment device for vehicle clutch - Google Patents

Description

  The present invention relates to a vehicle clutch that engages and disengages a clutch with an actuator, and more particularly to an apparatus that adjusts clutch play.

  Patent Document 1 discloses a mechanism that adjusts initial play in a mechanical clutch that transmits an operation force of a clutch pedal by a driver through a cable.

Patent No. 3050006

  On the other hand, adjustment of the play of the vehicle clutch that connects and disconnects the clutch by the actuator (clutch booster) is performed by applying a ruler to the clearance between the lever member linked to the actuator and the engagement member of the movable clutch member, that is, the clutch play. The adjustment was made while measuring, but the work was troublesome and the adjustment amount varied.

  The present invention has been made paying attention to such a conventional problem, and it is possible to easily adjust the play of the vehicle clutch that is engaged and disengaged by the actuator and to suppress the variation in the adjustment amount. An object is to provide an adjusting device.

In a vehicle clutch that performs a clutch disengagement operation by engaging and engaging an engagement portion of a movable clutch member with an end portion of a lever member that swings in association with an output rod of an actuator for clutch engagement / disconnection,
An elastic stopper member is attached to a portion of the movable side clutch member that is located on the opposite side of the engaging portion across the lever member, and the lever member is engaged with the engaging portion in a direction opposite to the clutch disengaging operation. The lever member abuts against the elastic stopper member by an operation equivalent to clutch play, and the lever member is configured to be able to get over by elastically deforming the elastic stopper member.

  When adjusting the play, you can feel a response (resistance) when moving the lever member linked while changing the output rod length of the actuator in the opposite direction to the clutch disengagement operation and coming into contact with the elastic stopper member. By fixing the output rod length in position, clutch play can be easily adjusted.

  Further, since the lever member can be elastically deformed by the elastic stopper member to overcome the engagement between the lever member and the movable side clutch member, the member including the release yoke can be easily attached to and detached from the transmission. Maintained.

The figure which shows the clutch for vehicles which concerns on embodiment of this invention, and its operation system. The principal part sectional drawing which shows the peripheral part of a clutch same as the above. The perspective view of the release sleeve with which a clutch same as the above is equipped. The perspective view of a release sleeve and a release yoke same as the above. The perspective view which looked at the release sleeve and release yoke same as the above from the direction different from FIG. The figure which shows the guide spring with which a release sleeve same as the above is mounted | worn.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a vehicle clutch and its operating system. In FIG. 1, a master cylinder 2 is connected to a clutch pedal 1 via a link, and this master cylinder 2 is connected to a clutch booster 4 that is a clutch connecting / disconnecting actuator via a hydraulic line 3. The clutch booster 4 is connected to the outer wall of the transmission case. Oil is supplied to the master cylinder 2 from the clutch oil reservoir 5.

  The clutch booster 4 is also connected to the air tank 7 through the air line 6, and the hydraulic pressure (operation that is supplied via the hydraulic line 3 by the depression operation of the clutch pedal 1 by the booster mechanism built in the clutch booster 4 is operated. Force) is amplified by the air pressure supplied from the air tank 7 through the air line 6 and transmitted to the output rod 4a, and the output rod 4a is stretched against the return spring 4b.

FIG. 2 shows the periphery of the clutch, which will be described below with reference to FIG.
One end of the outer lever 9 of the clutch is coupled to the end of the shaft 8 that is pivotally supported by the outer wall of the clutch housing 7 and protrudes outward by key coupling or the like, and the output end of the output rod 4a of the clutch booster 4 is It is pivotally connected to the other end of the outer lever 9.

  The shaft 8 is disposed perpendicular to an input shaft 10 of a transmission that can be freely connected to a crankshaft of an engine (not shown) via a clutch, and a release yoke 11 is coupled to the center of the clutch housing 7 by welding or the like. Has been. Therefore, the release yoke 11 constitutes a lever member that is linked to the output rod 4 a of the clutch booster 4 via the outer lever 9 and the shaft 8.

  The release yoke 11 has a U-shaped outer shape, and a pair of engaging portions projecting in the outer diameter direction from the transmission side end portion of the release sleeve 12 which is a movable side clutch member at the time of clutch disconnection operation. It is arrange | positioned so that it can engage with 12a via clutch play freely.

  The release sleeve 12 is spline-engaged with a cylindrical portion formed in the center portion inside the clutch housing 7 so as to freely move in the axial direction, and the inner periphery of the diaphragm spring 13 is formed in a circumferential groove formed in the peripheral wall of the engine side end portion. The end is engaged.

  When the output rod 4a of the clutch booster 4 is extended by the depression of the clutch pedal, the outer lever 9 and the release yoke 11 are rotated counterclockwise in FIG. 2 together with the shaft 8, and both ends of the release yoke 11 are the release sleeve 12. The release sleeve 12 is pulled in the axial direction toward the transmission side by engaging with the engaging portion 12a. Thereby, the diaphragm spring 13 is elastically deformed toward the axial transmission side, and the clutch engagement surface 14a of the clutch disk 14 connected to the outer peripheral edge of the diaphragm spring is connected to the clutch of the flywheel 15 connected to the crankshaft of the engine. The clutch is disconnected from the joint surface 15a.

  When the clutch pedal 1 is operated to return, the diaphragm spring 13 is restored to its original position by the elastic restoring force, and the clutch engagement surface 14a of the clutch disk 14 and the clutch engagement surface 15a of the flywheel 15 are joined by the elastic force. The clutch is engaged.

  In the vehicle clutch having such a configuration, the adjustment of the play of the clutch has been conventionally performed as follows. The output rod 4a is fixed to the base end portion on the booster body side via a lock nut 4c, and the lock rod 4c is loosened to rotate the output rod 4a around the axis, thereby projecting from the base end portion of the output rod 4a. It is configured to be adjustable in length. Note that the length of the output rod 4a is increased by rotation in one rotation direction, and the length of the output rod 4a is decreased by rotation in the opposite rotation direction. Therefore, after removing the return spring 4b, the lock nut 4c is loosened to rotate the output rod 4a around the axis, and the clutch play amount is changed from the rotational position of the outer lever 9 when the release yoke 11 contacts the engaging portion 12a. When the length of the output rod 4a is reduced, the lock nut 4c is fastened and adjusted. Since this adjustment is performed while measuring the clutch play with a ruler, the work is troublesome and adjustment variations occur.

  In order to eliminate the above-described conventional problems, in this embodiment, an elastic stopper member for adjusting play of the release yoke 11 is provided at a position opposite to the engagement portion 12a with the end of the release yoke 11 of the release sleeve 12 interposed therebetween. A guide spring 16 is attached.

  Specifically, as shown in FIGS. 3 to 5, which are enlarged views of the periphery of the release sleeve 12, a large-diameter cylinder that protrudes in a trapezoidal shape from the small-diameter cylindrical portion at the corresponding position of the release sleeve 12. An engaging groove 12c is formed in the convex portion 12b continuous with the outer peripheral surface and the upper and lower side surfaces of the protruding portion 12b, and the guide spring 16 bent and formed with a metallic spring material in the engaging groove 12c as shown in FIG. The end is locked and attached.

  The guide spring 16 has a central portion that protrudes outward from the engaging groove 12 c, the protruding portion 16 a is formed so as to freely contact the engine side surface of the release yoke 11, and the end portion of the release yoke 11 is engaged. The amount of rotation from the rotational position in contact with the joint portion 12a to the rotational position in contact with the protrusion 16a of the guide spring 16 is set as clutch play (see FIGS. 2 and 4).

The clutch play adjustment of the vehicle clutch of this embodiment having such a configuration is performed as follows.
As in the prior art, after the return spring 4b is removed, the lock nut 4c is loosened and the length of the output rod 4a is increased while rotating the output rod 4a around the axis. 16a abuts and feels resistance (resistance). In this state, the lock nut 4c is tightened to fix the length from the base end of the output rod 4a, and the return spring 4b is remounted. Then, adjustment of clutch play is completed.

  After the adjustment, when the clutch is operated and the output rod 4a of the clutch booster 4 is extended, the outer lever 9 and the release yoke 11 rotate around the shaft 8 counterclockwise in FIG. 2, and both ends of the release yoke 11 are engaged with the clutch. After rotating by the amount of play, the clutch is disengaged by engaging with the engaging portion of the release sleeve 11 and pulling the release sleeve 11 in the axial direction on the transmission side.

  If the clutch engagement surface or the like is worn due to repeated clutch operation, the release sleeve 11 moves to the right side (engine side) in FIG. 2 and the clutch play is reduced. Therefore, the clutch play adjustment may be performed again.

With such a configuration, it is possible to easily adjust the clutch play without measuring the clutch play using a ruler or the like, thereby improving maintainability and suppressing adjustment variations.
In addition, since the projection 16a of the guide spring 16 is elastically deformed so that the release yoke 11 can get over the guide spring 16 and disengage the release yoke 11 from the release sleeve 12, the transmission (clutch) of the member including the release yoke can be released. The workability at the time of attaching to and detaching from the housing can be maintained well without being impaired.

DESCRIPTION OF SYMBOLS 4 ... Clutch booster 4a ... Output rod 4c ... Lock nut 8 ... Shaft 9 ... Outer lever 11 ... Release yoke 12 ... Release sleeve 12a ... Engagement part 12c ... Engagement groove 16 ... Guide spring 16a ... Projection part

Claims (2)

In a vehicle clutch that performs a clutch disengagement operation by engaging and engaging an engagement portion of a movable clutch member with an end portion of a lever member that swings in association with an output rod of an actuator for clutch engagement / disconnection,
An elastic stopper member is attached to a portion of the movable clutch member that is located on the opposite side of the engaging portion across the lever member, and the clutch disengaging operation from the position where the lever member engages with the engaging portion. The play adjustment of the vehicular clutch characterized in that the lever member abuts on the elastic stopper member by an operation equivalent to clutch play in the reverse direction, and the lever member is configured to be able to get over by elastically deforming the elastic stopper member. apparatus.   The elastic stopper member is formed of a wire-like metal spring material, and both end portions are locked to the outer wall of the movable clutch member, and the central portion is pushed into the inner side of the movable clutch member by a lever member. The play adjustment device for a clutch for a vehicle according to claim 1, which has a shape that is elastically deformed.

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