JPH0533783Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is designed to slide a clutch plate between a pressure plate and a flywheel through the forward and backward movement of a release cylinder that is provided in communication with a master cylinder. In the clutch mechanism provided, it relates to a structure that sets the wear limit of the clutch disk, and more specifically, the pressure plate and the fly that occur due to the exposure of the rivet that rivets the facing portion of the clutch disk. Regarding improvements to prevent wheel damage.

[Conventional technology]

In general, a clutch mechanism, particularly a non-adjustable clutch mechanism, is provided with a release cylinder that communicates with a master cylinder connected to the clutch pedal, and the release cylinder is released by operating a piston rod that is inserted into the release cylinder so that it can move forward and backward. A clutch plate is provided to slide between the shear plate and the flywheel. FIG. 2 is a drawing showing its specific structure, in which 1 is a release cylinder, 11' is an oil port connected to the master cylinder, 3 is a cylinder piston that is inserted into the release cylinder 1 so that it can move forward and backward, and 5 indicates a piston rod extending from the cylinder piston 3. The tip of the piston rod 5 is connected to a shift fork 24 via a push rod 25, and by rotating the shift fork 24, the bearing collar 22 is moved forward and backward, thereby rotating the release lever 20. Although the clutch disk 13 is provided so that it can be slid between the pressure plate 18 and the flywheel 16 through rotation of the release lever 20, if the clutch disk 13 becomes worn, When the clutch is connected, the pressure plate 18 and release lever 20 are urged toward the clutch disk 13 by the clutch spring 19, and the bearing collar 22, shift fork 24, and push rod 25
is provided so that its position changes toward the release cylinder 1 by the amount of wear caused on the clutch disk 13, and pushes the cylinder piston 3 back toward the bottom 1' side of the release cylinder 1 via the piston rod 5.

[The problem that the idea aims to solve]

However, in the case of the clutch mechanism as described above,
As the clutch disc wears, the cylinder piston is pushed back toward the bottom 1' side of the release cylinder 1, while the release cylinder 1
Since the cylinder piston is not provided with any means for regulating the amount of movement of the cylinder piston, the position of the cylinder piston gradually changes toward the bottom 1' of the release cylinder 1 as wear of the clutch disk progresses. Eventually, the rivets that rivet the facings on the clutch disk become exposed, causing problems such as the rivets damaging the flywheel and pressure plate, which are extremely expensive and difficult to replace. There are some problems.

This invention is an attempt to improve the above-mentioned problems, and prevents damage to the flywheel and pressure plate caused by exposure of the rivet due to wear of the clutch disk. The problem to be solved lies in making it possible to do so. That is, the present invention aims to stop the friction of the clutch disk against the flywheel and pressure plate before the rivet is exposed, or in other words, to limit the wear of the clutch disk by regulating the amount of movement of the cylinder piston. The present invention is characterized in that the above-mentioned problems are solved by setting .

[Means to solve the problem]

The fine adjustment bottom is screwed onto the bottom of the release cylinder so that it can be adjusted forward and backward, facing the cylinder piston.

[Effect]

When the clutch disc is not worn, screw the fine adjustment bottom to the bottom of the release cylinder and set it between the cylinder piston and the bottom of the release cylinder.
Fine adjustment according to the wear allowance of the clutch disc〓
By forming the gap, the wear limit of the clutch disk can be set. If the cylinder piston moves toward the bottom of the release cylinder as the clutch disk wears, the cylinder piston will come into contact with the fine adjustment bottom when the clutch disk reaches its wear limit. .

〔Example〕

Hereinafter, specific embodiments of the present invention will be described with reference to the illustrative drawings.

In FIG. 1, 1 indicates a release cylinder. Reference numeral 2 denotes a cylinder body of the release cylinder 1. The cylinder body 2 is formed into a cylindrical shape with openings at both ends, and a cylinder piston 3 is fitted into the cylinder body 2 so as to be freely retractable. At the same time, a piston rod 5 extends from the center of the cylinder piston 3 toward the opening of the tip of the cylinder body 2, and its tip is provided so as to face into a clutch case 6, which will be described later.
On the other hand, on the bottom 2' side of the cylinder main body 2, a female screw part 2s is carved along the inner peripheral surface, and a fine adjustment bottom in which a male screw part 8s is carved on the outer peripheral part of the female screw part 2s. 8 is screwed into the base portion of the fine adjustment bottom 8 so as to be adjustable forward and backward, and a fixing nut 7 for fixing the fine adjustment bottom 8 is screwed into the base portion of the fine adjustment bottom 8. A spring 9 is interposed between the fine adjustment bottom 8 and the cylinder piston 3, and protrusions 8' and 3' are opposed to each other so as to face into the spring 9. A fine adjustment gap S is formed between the protrusions 8' and 3'. The fine adjustment interval S is the wear allowance of the clutch disc 13 (facing part 13C).
(distance between the surface of the rivet 13D and the rivet 13D). A passage 11 is carved in the center of the fine adjustment bottom 8 and communicates with the pressure chamber 10 formed between the fine adjustment bottom 8 and the cylinder piston 3, and an oil port 11 is formed at the end of the passage 11. Although not shown, it is connected to a master cylinder connected to a clutch pedal.

Reference numeral 6 designates the aforementioned clutch case, in which a main drive shaft 12 is rotatably suspended horizontally, and a clutch disk 13 is spline-fitted to the main drive shaft 12. More specifically, the same clutch disk 1
Reference numeral 3 denotes a boss portion 13A spline-fitted to the main drive shaft 12, a plate portion 13B extending from the boss portion 13A toward the outer circumference, and a flywheel 16 and a plate portion to be described later on the outer circumferential edge of the plate portion 13B. Facing portion 1 facing the shear plate 18 and riveted with rivets 13D
Formed from 3C. A crankshaft 15 is coaxially mounted horizontally on one end of the main drive shaft 12 via a pilot bearing 14, and a flywheel 16 is fixed to the end of the crankshaft 15. Same flywheel 16
is provided facing the clutch disk 13 so as to be able to slide against the clutch disk 13, and a clutch cover 17 is fixed to the flywheel 16 so as to cover the clutch disk 13. A window hole 17' is opened in the center of the rear wall of the clutch cover 17 in correspondence with the main drive shaft 12, and the pressure plate 1 is provided inside the clutch cover 17.
8 is provided. The pressure plate 18 is provided so as to come into pressure contact with the facing portion 13C of the clutch disk 13 via a clutch spring 19. A fulcrum pin 26 is horizontally suspended within the clutch cover 17, and a release lever 20 is pivotally connected to the fulcrum pin 26. The release lever 20 is provided to extend in the radial direction of the clutch cover 17, and one end on the outer diameter side is pivotally connected to the pressure plate 18, while one end on the inner diameter side is mounted inside the window hole 17'. It is set up so that you can see the sky.
Furthermore, a bearing collar 22 is loosely fitted into the main drive shaft 12 so as to be able to slide freely in the axial direction so that it can come into contact with one end of the inner diameter side of the release lever 20 via a release bearing 21. and the same bearing collar 22
An engaging protrusion 22' is provided in a protruding manner on the peripheral wall.

Reference numeral 23 denotes a fulcrum shaft horizontally suspended within the clutch case 6 in a direction perpendicular to the main drive shaft 12. A shift fork 24 and a push rod 25 are mounted on the fulcrum shaft 23. The tip end of the push rod 25 is provided so as to be able to come into contact with the engagement protrusion 22', while the tip end of the push rod 25 is connected to the piston rod 5 of the release cylinder 1.

Next, its effect will be explained.

FIG. 1 is a drawing showing a state in which the clutch is connected when the clutch disk 13 is not worn.
When setting the wear limit of the release cylinder 1, the fine adjustment bottom 8 is screwed into the release cylinder 1, and the protrusion 8' formed at the tip thereof is once brought into contact with the protrusion 3' on the cylinder piston 3 side. After that, adjust the fine adjustment bottom 8 by adjusting the wear allowance of the clutch disk 13 (the surface of the facing part 13C and the rivet 13D).
At the same time, set the fine adjustment distance S between both protrusions 3' and 8' by the same amount (distance between them) as shown in FIG. By fixing the wear limit, the wear limit can be set. The position of the cylinder piston 3 within the cylinder body 2 when the clutch is connected is not necessarily a constant position due to dimensional errors and assembly errors of each part such as the piston rod 5, shift fork 24, push rod 25, etc. , fine-tune bottom 8 like this
By making fine adjustments through the screw engagement, a certain fine adjustment can be made between the fine adjustment bottom 8 and the cylinder piston 3 in accordance with the wear allowance of the clutch disk 13.
The interval S can be set. When the clutch disk 13 is not worn as described above, and the clutch is in the engaged state, the clutch disk 13 is in pressure contact with the flywheel 16 through the biasing pressure of the clutch spring 19. be. In addition, when the clutch is connected in this manner, hydraulic oil is supplied from the master cylinder into the pressure chamber 10 through the oil port 11' and the passage 11, so that the cylinder piston 3
is pushed out, and the piston rod 5 extending from the cylinder piston 3 moves in the direction of the clutch case 6. At the same time, the push rod 25 connected to the tip of the piston rod 5 moves in the direction of the clutch cover 17 using the fulcrum shaft 23 as a fulcrum. This gives the effect of rotating towards. As the push rod 25 rotates in the direction of the clutch cover 17 in this manner, the shift fork 24 rotates in the same direction in conjunction with the push rod 25. As the shift fork 24 rotates in the direction of the clutch cover 17 in this manner, the tip of the shift fork 24 presses the engagement protrusion 22', causing the bearing collar 22 to move along the main drive shaft 12. This provides the effect of sliding the clutch cover 17 so that it faces into the window hole 17'. By sliding the bearing collar 22 so as to face the inside of the window hole 17' in this manner, one end of the inner diameter side of the release lever 20 is pressed against the biasing pressure of the clutch spring 19.
The action of rotating one end of the outer diameter side of the release lever 20 toward the release cylinder 1, that is, the action of retracting the pressure rate 18 and disengaging the clutch disk 13 from the flywheel 16, is obtained.

When the clutch disc 13 is not worn as described above, and the wear limit of the clutch disc 13 is set, the supply of hydraulic oil from the master cylinder to the release cylinder 1 is stopped. When the clutch disk 13 is pressed against the flywheel 16 through the biasing pressure of the clutch spring 19, the cylinder piston 3 moves in the direction of the fine adjustment bottom 8, and the cylinder piston 3 moves toward the fine adjustment bottom 8 and the cylinder. Constant fine adjustment between 3 pistons
However, if the clutch disk 13 is worn and its thickness decreases, the clutch disk 13 will have the above-mentioned gap S corresponding to the amount of wear.
A state is obtained in which the distance S gradually decreases. When the clutch disk 13 has almost no wear remaining, that is, when the distance between the surface of the facing portion 13C of the clutch disk 13 and the rivet 13D is small, the rivet 13D is attached to the flywheel. 16 or the pressure plate 18, the protrusion 3' of the cylinder piston 3 comes into contact with the protrusion 8' of the fine adjustment bottom 8 in the release cylinder 1, thereby regulating the amount of wear on the clutch disk 13. Effect can be obtained. In this way, when the clutch disk 13 wears out by a certain amount (wear limit), the cylinder piston 3
The protrusion 3' of the clutch disk 13 comes into contact with the protrusion 3' of the clutch disk 13.
By restricting further abrasion of the rivet 13D, exposure of the rivet 13D can be prevented, thereby preventing damage to the flywheel 16 and pressure plate 18 caused by sliding friction with the rivet 13D. . In addition, when the protrusion 3' of the cylinder piston 3 comes into contact with the protrusion 8' of the fine adjustment bottom 8 in this way, the distance between the flywheel 16 and the pressure plate 18 does not narrow any further. , the power from the crankshaft 15 to the flywheel 16 and pressure plate 18 is not transmitted to the clutch disk 13 via the flywheel 16. Since the power is not transmitted to the clutch disc 13 in this way, the vehicle comes to a stop, and it can be detected that the clutch disc 13 is at its wear limit.

[Effect of idea]

The present invention is constructed as described above.
As mentioned above, a release cylinder is provided in communication with the master cylinder connected to the clutch pedal,
A cylinder piston is inserted into the release cylinder so that it can move forward and backward, and the tip of the piston rod extending from the cylinder piston is connected to a shift fork, etc., and the pressure plate is moved to the flywheel by the shift fork. At the same time, the cylinder piston moves toward the bottom of the release cylinder due to positional fluctuations of the shift fork, etc. due to wear of the clutch disk that rubs between the pressure plate and the flywheel. In the clutch mechanism installed in the release cylinder, the fine adjustment bottom is screwed into the bottom of the release cylinder so that the cylinder piston can be freely adjusted forward and backward, with the fine adjustment bottom facing the cylinder piston. By forming a fine adjustment gap between the bottom and the fine adjustment bottom in correspondence with the wear allowance of the clutch disk, it has become possible to set the wear limit of the clutch disk. By making it possible to set the wear limit of the clutch disk in this way, it is possible to prevent the rivet from being exposed due to wear of the clutch disk through contact of the cylinder piston with the fine adjustment bottom. To prevent the occurrence of a problem in which the rivet riveting the facing part is exposed as the clutch disk wears and the pressure plate and flywheel are damaged by the rivet as in the past. I was able to do it. In addition, as mentioned above, since the fine adjustment bottom is not fixed but can be adjusted forward and backward, constant fine adjustment between the cylinder piston and the cylinder piston can be achieved regardless of dimensional errors or assembly errors of each part. I was able to form a gap.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the entire clutch mechanism equipped with a clutch disk wear amount regulating structure according to the present invention. Further, FIG. 2 is a sectional view showing the entire conventional clutch mechanism. 1...Release cylinder, 2...Cylinder body, 2s...Female screw part, 2'...Bottom, 3...
...Cylinder piston, 5...Piston rod,
6...Clutch case, 7...Fixing nut, 8...
...Fine adjustment bottom, 8s...Male thread, 8'...Protrusion, 9...Spring, 10...Pressure chamber, 11...Passage, 11'...Oil port, 12...Main drive shaft, 13 ...Clutch disc, 13A...
Boss part, 13B...Plate part, 13C...Facing part, 13D...Rivet, 14...Pilot bearing, 15...Crankshaft,
16... Flywheel, 17... Clutch cover, 17'... Window hole, 18... Pressure plate, 19... Clutch spring, 20... Release lever, 21... Release bearing, 22
...Bearing collar, 22'...Engagement protrusion, 2
3...Fully shaft, 24...Shift fork, 25...
...Pushy rod, 26...Fulcrum pin.

Claims (1)

[Scope of utility model registration request] A release cylinder is provided in communication with the master cylinder connected to the clutch pedal, and a cylinder piston is fitted into the release cylinder so that it can move forward and backward, and the tip of the piston rod extending from the cylinder piston is connected to a shift fork, etc. While the shift fork moves the pressure plate forward and backward toward the flywheel, the position of the shift fork changes due to wear of the clutch disk that slides between the pressure plate and the flywheel. In the clutch mechanism, the cylinder piston is provided so that the cylinder piston moves toward the bottom of the release cylinder, and the clutch mechanism includes a fine adjustment bottom screwed onto the bottom of the release cylinder so that the fine adjustment bottom faces the cylinder piston and can be freely adjusted forward and backward. A wear limit setting structure for the clutch disc in the mechanism.