JPS6238018Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a clutch lifter device for a multi-branched friction clutch used in motorcycles and the like.

PRIOR ART AND PROBLEMS There is a conventional clutch lifter device, such as the one shown in FIG. 1, in which a clutch lifter plate is operated by a shaft member (rod) with a rack attached thereto.

That is, a predetermined shaft hole 04 is formed in the clutch cover 03 of the clutch disposed at the shaft end of the main shaft 01 in the transmission.
A clutch lifter plate 0 is coaxial with the shaft hole 04.
A lifter rod 05 having a rack 06 on its shaft is inserted into the shaft hole 04.
Further, a flange 07 is formed at one end of the lifter rod 05 adjacent to the clutch plate 02, and a thrust bearing 01 is formed between the flange 07 and the side surface of the clutch lifter plate 02.
0 is inserted, and a pinion 09 attached to a lifter shaft 08 is meshed with the rack 06.

In the above configuration, when the lifter shaft 08 is rotated clockwise in FIG. 1 by a clutch lever (not shown), the lifter rod 0
5 is moved to the right, and the clutch lifter plate 02, which is in a rotating state, is attached to the thrust bearing 010.
is moved to the right (in the clutch disengaging direction) by the flange 07 of the shaft 05.

Therefore, in the clutch lifter device, the lifter rod 05 is connected to the clutch lifter plate 0.
Since the lifter rod 05 is supported by the inner surface of the opening 2 or the inner wall surface thereof (the left wall surface in FIG. 1), the moment centered on the support portion (in the counterclockwise direction in FIG. 1) is applied to the lifter rod 05 during lift operation. This poses a problem in that the clutch lifter plate 02 and the inner surface of the shaft hole 04 are subject to an undesirable load, and the thrust bearing 010 is easily worn out because it is subjected to pressing force in a rotating state.

Although some effect can be obtained by interposing a spring washer between the thrust bearing 010 and the inner wall surface of the clutch lifter plate 02 to solve this problem, it is not an essential solution.

The present invention addresses this problem, and its purpose is to provide a clutch lifter plate,
It is an object of the present invention to provide a clutch lifter device in which seizure is less likely to occur between its operating members and the bearings are less worn out.

Embodiment Hereinafter, an embodiment of the present invention shown in FIG. 2 will be described.

The clutch 2 is disposed coaxially with the main shaft 1 of the transmission, and has a clutch outer 5 in which a driven gear 4 and a plurality of clutch disks 6 are engaged and disposed at the shaft end of the main shaft 1. An assembly 3 is rotatably supported.

Furthermore, a clutch center 7 is connected to the main shaft 1 by spline engagement on the outer side of the pivot portion of the clutch outer 5 in the main shaft 1.
A plurality of clutch plates 8 are disposed in engagement with the outer peripheral groove of the cylindrical portion of the clutch center 7.

Further, a clutch lifter plate 24 is disposed outside the shaft end of the main shaft 1, and a shaft portion 25 having a center opening 26 is protruded from the plate 24. It is fitted into an opening at the end of the shaft 1. Moreover,
The clutch outer 5 is attached to the plate 24.
A pressure plate 27 is disposed between the clutch center 7 and the clutch center 7, and has a plurality of boss portions 27a with screw holes formed therein. A pressure plate 27 is screwed to each boss portion 27a. Each boss portion 27a passes through a plurality of openings formed in the radial wall portion of the clutch center 7, and is fitted onto each boss portion 27a so that the clutch spring 28 connects the clutch center 7 and the clutch lifter. The plate 24 is arranged so as to urge the plate 24 to separate the two from each other. Furthermore, the clutch lifter plate 24
A ball 22 is inserted into the center opening 26, and a needle bearing 20 is press-fitted onto the edge of the opening, and an oil seal 23 is provided.

On the other hand, a lifter rod 16 is disposed in the clutch cover 10, extending between a boss portion 11 having an opening at the same axis as the main shaft 1 and a center opening 26 of a clutch lifter plate 24. The rod 16 has a rack portion 1 having a rack on one side.
7. It is formed of shaft parts 18 and 19 extending coaxially in both directions with the rack part 17 in between, and is fitted into the central opening 26 so that the shaft part 18 contacts the ball 22 at its tip. The shaft portion 19 is inserted into the opening of the boss portion 11 via the bush 21 .

Further, a lifter shaft 13 rotatably supported by needle bearings 12 disposed in a pair of receiving portions formed on the clutch cover 10 is disposed so as to be orthogonal to the lifter rod 16.
A pinion 15 that meshes with the rack of the rack portion 17 is formed at the junction. moreover,
A lifter lever 14 is attached to the shaft end of the lifter shaft 13 that partially protrudes outside the clutch cover 10.
is screwed on.

The embodiment shown in FIG. 2 is constructed as described above, and when the engine is running, the rotation of the driven gear 4 that meshes with the gear on the crankshaft side causes the clutch assembled integrally with the gear 4 to rotate. The outer 5 rotates, and the plurality of clutch disks 6 also rotate together.

However, the pressing portion 27b of the pressure plate 27, which is biased by the clutch spring 28 disposed on the side surface of the clutch center 7,
Since the plurality of clutch disks 6 and the plurality of clutch plates 8, which are strongly pressed with the clutch center 7, are in frictional engagement with each other, the rotation of the clutch outer 5 is caused through the clutch plates 8. This is transmitted to the clutch center 7, and the main shaft 1, which is in spline engagement with the clutch center 7, rotates.

Next, when it is necessary to disconnect the clutch 2, the lifter lever 14 is pushed toward the back side of the paper in FIG.
The pinion 15 integrated therewith rotates, and the lifter rod 16, which engages with the pinion 15 at the rack part 17, moves to the left, and the shaft part 25 of the rotating clutch lifter plate 24 moves to the left via the ball 22. It slides in the axial direction within the opening of the shaft 1, and the pressure plate 27 is also inevitably displaced in the same direction (displacement that resists the elastic force of the clutch spring 28), so that the plurality of clutch disks 6 And the frictional engagement of the clutch plate 8 is released.

Therefore, the rotation of the clutch outer 5 is not transmitted to the main shaft 1, and the clutch 2 is in a disengaged state.

In the embodiment described above, the lifter rod 16 is supported at two places, the needle bearing 20 and the bush 21, and when the lifter rod 16 is moved by the rotation of the pinion 15, no excessive force is applied to the lifter rod 16, so that the clutch is Movements are carried out easily.

Further, since the clutch lifter plate 24 is pressed against the lifter rod 16 via the ball 22, there is no fear of seizure.

Furthermore, since the needle bearing 20 is disposed on the lifter rod 16, it is not subjected to excessive pressing force as in the one shown in FIG. 1, and is less likely to wear out. Therefore, the life of the bearing can be extended.

Furthermore, the lifter rod 16 is connected to the rack portion 1.
Since the shaft portions 18 and 19 extend in both directions with 7 in between, the operating stroke can be relatively long, and maintenance due to dimensional intersections is not required.

Effects of the invention As is clear from the above explanation, in a clutch lifter device for a multi-disc friction type clutch in which engagement and disengagement are performed by the movement of a lifter rod that has a rack that engages with a pinion on a clutch shaft that is rotated by a clutch lever, the lifter rod is supported via bearings at the shaft portions on both sides of the rack, and one shaft edge is provided at the center of rotation of the lifter plate, which rotates on the same axis as the clutch center, and is located at the center of rotation of the lifter plate. A clutch lifter device has been proposed in which a pressing force is transmitted to a lifter plate via a ball housed in the rotation center.

According to such a configuration, the following actions and effects can be obtained.

The lifter rod is supported via bearings on the shafts on both sides of the rack, so when the rack is moved in engagement with the pinion during clutch disengagement, undue force (deflection) is applied to the lifter rod. This prevents seizure between the lifter plate and the lifter plate.
The clutch operates easily.

The pressing force of the lifter rod is transmitted to the lifter plate via the ball, which is stored in the center of rotation of the lifter plate and therefore automatically centripetes as the lifter plate rotates (the ball is always pushed correctly at its center). Therefore, no pressing force is applied to the bearing provided at the center of rotation of the lifter plate, and the bearing is less likely to wear out and has a long life.

[Brief explanation of the drawing]

FIG. 1 is a schematic illustration of a clutch lifter device according to the prior art, and FIG. 2 is a sectional view of a clutch having a clutch lifter device according to an embodiment of the present invention. 1... Main shaft, 2... Clutch body,
3...Clutch outer assembly, 4...Driven gear, 5...Clutch outer, 6...Clutch disk, 7...Clutch center, 8...Clutch plate, 10...Clutch cover, 11...
...Boss part, 12... Needle bearing, 13...
...Lifter shaft, 14...Lifter lever,
15...Pinion, 16...Lifter rod, 1
7... Rack part, 18... Shaft part, 19... Shaft part,
20...Needle bearing, 21...Button, 22...Ball, 23...Oil seal, 2
4...Clutch lifter plate, 25...Shaft portion, 26...Center opening portion, 27...Pressure plate, 27a...Boss portion, 27b...Press portion, 28...Clutch spring.

Claims (1)

[Claims for Utility Model Registration] A clutch lifter device for a multi-plate friction clutch in which engagement and disengagement are performed by the movement of a lifter rod having a rack that engages with a pinion on a clutch shaft rotated by a clutch lever, wherein the lifter rod is The clutch is supported by shaft portions on both sides of the rack via bearings, and one of the bearings is provided at the center of rotation of a lifter plate that rotates on the same axis as the clutch center,
The clutch lifter device has a structure in which the pressing force of the lifter rod is transmitted to the lifter plate via a ball housed in the rotation center.