JPH0729315Y2 - Release device for pull type clutch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a release device, and more particularly to a release device for a pull type clutch for moving a release bearing arranged in the central portion of the pull type clutch in the central axis direction. Regarding

[Conventional technology]

A conventional pull-type clutch is provided with a release device including a release fork whose front end is locked to a release bearing and a support block which rotatably supports the release fork.

In a general release device, as shown in FIG.
The release fork 50 is supported by a support block 52 via a support shaft 51. The support block 52 is the front surface of the transmission housing 53 (the rear surface of the clutch housing)
Are fixed by bolts 54 extending parallel to the central axis of the clutch.

When disassembling the clutch, it is necessary to remove the transmission housing integrally including the clutch housing. However, in the pull type clutch, the release fork interferes with the release bearing, so that the transmission housing cannot be easily removed.

Therefore, conventionally, the transmission housing can be removed by removing the release bearing from the diaphragm spring on the clutch cover side in advance (snap-out) or by using a special structure at the fulcrum of the release fork.

[Problems to be solved by the device]

In the above-mentioned conventional configuration in which the release bearing is removed from the clutch cover side when the clutch is disassembled, the release bearing is arranged deep inside the clutch housing, and therefore the work is not easy.

Further, in the above-described conventional configuration in which the fulcrum portion of the release fork uses a special configuration, the structure of the fulcrum portion becomes complicated.

An object of the present invention is to provide a pull-type clutch release device having a simple structure and good workability when disassembling the clutch.

[Means for Solving the Problems]

The release device according to the present invention is a device for covering the outer periphery by a clutch housing having an opening in a part thereof and moving the release bearing in the central axis direction to release the clutch connection. This device includes a release fork, a support block, and a bolt. One end of the release fork projects outward from the opening of the clutch housing, and the other end contacts the clutch side of the release bearing. The support block is fixed inside the clutch housing and rotatably supports the central portion of the release fork. The bolt has a head portion facing the opening of the clutch housing and fixes the support block to the clutch housing.

[Action]

In the release device according to the present invention, when the release fork rotates about the central portion, the other end moves the release bearing to the side opposite to the clutch. As a result, the clutch is disengaged.

The operator operates the bolt through the opening of the clutch housing to remove the support block supporting the release fork from the clutch housing. Then, the release fork and the release bearing are disengaged. As a result, the workability is improved because the release fork and the release bearing are disengaged during the disassembling work for removing the transmission housing from the clutch. Since the head of the bolt faces the opening of the clutch housing, the operator can easily approach the bolt from the outer peripheral side of the clutch housing.

Moreover, in the release device according to the present invention, it is not necessary to employ a special configuration for the fulcrum portion of the release fork, so the structure is simple.

〔Example〕

FIG. 1 shows a pull type clutch to which an embodiment of the present invention is applied. Here, OO is the center line.

In the drawing, this pull-type clutch is mainly composed of a clutch cover assembly pair 1, a clutch disc 2, and a release fork 3.

The clutch cover assembly 1 has a clutch cover 5 fixed to a flywheel 4 on the engine side, a pressure plate 7 and a diaphragm spring 8 arranged inside the clutch cover 5. The outer periphery of the clutch disc 2 is sandwiched between the flywheel 4 and the pressure plate 7. A front end portion (a left end portion in FIG. 1) of a main drive shaft (not shown) on the transmission side is spline-engaged with the center of the clutch disc 2.

A transmission housing 10 is arranged behind the clutch cover 1 (on the right side in FIG. 1). A rear portion of a main drive shaft (not shown) that spline-engages with the clutch disc 2 extends into the mission housing 10. A clutch housing 11 is provided at the front end of the transmission housing 10 to cover the clutch cover 1, the flywheel 4, etc. from the outer peripheral side. Further, in the clutch housing 11, the front wall 10 of the mission housing 10 is
A sleeve 12 is arranged at the center of a (that is, the rear wall of the clutch housing). The sleeve 12 covers a main drive shaft (not shown) from the outer peripheral side.

A release bearing 13 is slidably fitted in the sleeve 12. An inner peripheral end of the diaphragm spring 8 is detachably engaged with the inner race side member 13a of the release bearing 13. An annular engagement member 14 including a wedge collar and a lever plate is attached to the inner peripheral portion of the diaphragm spring 8. In FIG. 1, the engagement member 14 elastically engages with the engagement groove formed in the inner race side member 13a of the release bearing 13, so that the release bearing 13 snaps into the diaphragm spring 8. It is in. The outer race side member 13b of the release bearing 13 is provided with an engagement member 15 with which the tip of the release fork 3 is engaged.

As shown in FIG. 2, the release fork 3 is bifurcated at the tip side portion thereof, and the pair of branch tip portions 16 sandwiches the release bearing 13 from the left and right, and the engaging member 15
Is engaged with. A notch 17 into which the tip of a support block 22 (described later) can be inserted in the middle of the release fork 3.
Is provided. The notch 17 is a notch that is opened upward between the two branch tip portions 16, and a hole 3a through which the pin 29 is inserted is formed in the center portion thereof. The lower part of the release fork 3 has a hole formed in the clutch housing 11 shown in FIG.
It extends through 18 and has a concave receiving portion 19 at its tip. A push rod 21 of a hydraulic cylinder 20 driven by a hydraulic mechanism (not shown) is in contact with the receiving portion 19.

As shown in FIG. 3, the support block 22 has a locking portion 23 having a semicircular tip, and the locking portion 23 has a locking hole 24. Further, the support block 22 has a fixing portion 25 integrated with the locking portion 23, and the fixing portion 25 has a bolt hole 26 through which a bolt (described later) penetrates. The bolt 26 extends in a direction orthogonal to the locking hole 24.

As shown in FIG. 4, the fixing portion 25 is fixed to a protrusion portion 28 of the front wall 10a of the transmission housing (that is, the rear wall of the clutch housing) by a bolt 27. The protrusion 28 is formed with a female screw hole 28a opening outward in the radial direction of the clutch, and the bolt 27 is screwed into the female screw hole 28a. The bolt 27 extends in the radial direction of the clutch (downward in the case of this embodiment) and can be easily attached / detached from a hole 18 formed in the clutch housing 11.

The locking portion 23 of the support block 22 is inserted into the notch 17 of the release fork 3 and rotatably supports the release fork 3 via a pin 29.

Next, the operation of the above embodiment will be described.

When assembling the clutch, first, the clutch cover assembly 1 and the clutch disc 2 are fixed in the state shown in FIG. Next, the mission housing 10 is brought closer to the clutch cover assembly 1 side from the rear. At this time, the sleeve
A release bearing 13 is fitted in advance in the 12. The release fork 3 is supported by a support block 22, and the tip of the release fork 3 is an engaging member 15 of the release bearing 3.
Is engaged with. Here, since the support block 22 locks the release fork 3 via the pin 29, the engagement of the release fork 3 with the engaging member 15 is reliably maintained.

After arranging the mission housing 10 in the state shown in FIG. 1,
The release fork 3 is rotated in the direction of arrow A. As a result, the release bearing 13 moves forward, and the inner race side member 13a engages with the engagement member 14 of the diaphragm spring 8 (snap-in). When the snap-in operation of the release bearing 13 is completed, the hydraulic cylinder 20
The push load 21 of is engaged with the receiving portion 19 of the release fork. This completes the clutch assembly process.

Next, when disassembling the clutch, the push rod 21 of the hydraulic cylinder 20 is removed from the release fork 3. Next, the bolt 27 is removed by approaching the bolt 27 from the hole 18 of the clutch housing 11, and the release fork 3 and the support block 22 are moved downward. As a result, the engagement of the release fork 3 with the engagement member 15 is released. As a result, it becomes possible to remove the transmission housing 10 rearward while leaving the release bearing 13 on the clutch cover assembly 1 side. Since the release bearing 13 can be easily approached by removing the clutch housing 11 together with the transmission housing 10, the release bearing 13 can be easily removed (snapped out) from the engaging member 14.

[Other Examples]

In the above embodiment, the projection 28 is integrated with the front wall 10a of the transmission housing 10, but a separate member may be fixed to the transmission housing 10.

[Effect of device]

In the release device according to the present invention, since the head of the bolt faces the opening of the clutch housing, the operator can easily approach the bolt from the outer peripheral side of the clutch housing. As a result, the disengagement work of the transmission housing from the clutch causes the release fork and release bearing to be disengaged.
Workability is improved.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a clutch adopting an embodiment of the present invention, FIG. 2 is a rear view of a release bearing and a release fork, FIG. 3 is a perspective view of a support block, and FIG. 4 is a release fork and a release fork. FIG. 5 is a sectional view of the support block, and FIG. 5 is a view corresponding to FIG. 4 of the conventional example. 3 ... Release fork, 11 ... Clutch housing,
13 ... Release bearing, 22 ... Support block, 27 ...
…bolt.

Claims (1)

[Scope of utility model registration request] 1. A release device for a pull-type clutch, the outer periphery of which is covered by a clutch housing having an opening in its part, for moving a release bearing in the central axis direction to release the clutch connection. A release fork protruding outward from an opening of the clutch housing and having the other end abutting the clutch side of the release bearing; a support fixed inside the clutch housing and rotatably supporting a central portion of the release fork. A block, and a head portion facing the opening of the clutch housing,
A pull-type clutch release device comprising: a bolt for fixing the support block to the clutch housing.