JPS608182Y2 - clutch operating cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch operating cylinder for operating a clutch device installed in a vehicle or the like.

Conventionally, a clutch operating cylinder includes a cylinder body having a cylinder hole, an operating piston that is slidably fitted into the cylinder hole and has a pressure chamber at both bottoms that communicates with a mask cylinder, and the operating piston and a clutch. a push rod E disposed between the clutch release arm and the clutch release arm, and when the pressure generated in the mask cylinder is transmitted to the pressure chamber, the actuating piston moves and swings the clutch release arm via the bushing rod. ing.

The clutch is disconnected and connected by frictionally engaging or disengaging the clutch plate of the clutch device in response to the swinging of the clutch release arm.

However, when the clutch operating cylinder is used to disconnect or connect the clutch as described above, when the clutch plates are frictionally engaged, or when the clutch plates are disengaged, the so-called half-clutch occurs. When in this state, vibrations occur, which are transmitted via the clutch release arm to the actuating piston of the clutch operating cylinder.

The vibrations transmitted to the actuating piston generate pressure oscillations (pulsations) in the liquid filling the piping system between the clutch operating cylinder and the clutch mask cylinder.

These hydraulic vibrations also cause the piston of the mask cylinder to vibrate, causing the clutch pedal to follow suit and vibrate, giving the driver a sense of uneasiness.Also, due to hydraulic vibration, each sealing part may be damaged. This causes problems such as impairing the function of the sealing member, inducing liquid leakage, and reducing the durability of the sealing member.

The generation of such vibrations is particularly noticeable in vehicles equipped with diesel engines, and the vibrations may be quite strong.

The present invention has been made in view of the above-mentioned problems, and aims to provide a clutch operating cylinder that can sufficiently damp vibrations with a simple structure. A recess facing the bushing rod is provided in the piston, a vibration damping material is inserted into the bottom side of the recess, and a movable member is provided, one end of which can come into elastic contact with the vibration damping material and the other end of which can come into contact with the bushing rod. It is movably inserted into the recess with a stopper.

As a result, the present invention has the following effects.

■ The vibration transmitted from the bushing rod tries to be transmitted to the piston, but because the vibration damping material is between the piston and the bushing rod, it is not transmitted to the piston.

Therefore, no hydraulic pressure pulsation occurs in the pressure chamber adjacent to the piston, thereby preventing damage to the sealing member within the piping system or transmitting vibrations to the operator.

■ The vibration damping material is surrounded by the piston and the movable member, and the piston is housed inside the cylinder body, so there is little influence from the outside of the cylinder body, and
Since oil, dirt, etc. do not adhere to the vibration damping material, the durability of the vibration damping material is improved, and the vibration damping effect can be effectively exerted over a long period of time.

- Even if the movable member violently moves within the recess of the piston in response to the vibration of the bushing rod and damages the inner circumferential surface of the recess, the inner circumferential surface of the recess will not form a liquid-tight seal and there will be no problem of liquid leakage.

Furthermore, since the piston itself does not move violently within the cylinder hole, liquid leakage due to the occurrence of sliding scratches can be prevented.

Hereinafter, the clutch operating cylinder of the present invention will be explained in detail based on the illustrated embodiment.

FIG. 1 is a side sectional view of a clutch operating cylinder that is an embodiment of the present invention.

In FIG. 1, the clutch operating cylinder is indicated as a whole by 1, and the cylinder 1 includes a cylinder body 3 in which a cylinder hole 2 is bored, and an operating piston 4 is slidable in the cylinder hole 2. A pressure chamber 5 is defined by fitting into the .

The actuating piston 4 has a small diameter portion 6 extending toward the closed end of the cylinder hole 2 and a lip-shaped sealing member 7 fitted onto the small diameter portion 6. is provided with a cylindrical recess 8.

A vibration damping material 9 made of synthetic rubber and a movable member 10 are inserted into the recess 8 of the actuating piston 4 adjacent to the vibration damping material 9. They are prevented from coming out.

The vibration damping material 9 has a substantially cylindrical shape, and a constriction 12 having a reduced diameter in a spherical shape is provided in the center portion, and there is a slight volume between the constriction 12 and the inner wall of the recess 8. An annular space 13 is formed.

The movable member 10 is slidably fitted into the recess 8, and a hemispherical guide surface 14 is provided at the opening end side.

Movable member 10 and clutch release arm 1 shown by broken lines
A bushing rod 16 is arranged between the
The left end of the bushing rod 16 is in spherical contact with the guide surface 14 of the movable member 10, and the right end is in spherical contact with the clutch release arm 15 through a collar portion 18 having a spherical guide surface 17.

Reference numeral 19 denotes a dustproof boot disposed between the end of the cylinder body 3 and the bushing rod 16. One end of the boot 19 is fitted into the groove 20 of the bushing rod 16, and the other end is attached to the bushing rod 16. It is pressed and fitted into the groove 21 of No. 3 by a ring 22.

On the other hand, a light spring 24 is stretched between the flange 23 of the small diameter portion 6 of the working piston 4 and the closed end of the cylinder hole 2.
The operating piston 4 is lightly urged toward the clutch release arm 15 side.

The pressure chamber 5 communicates with the hydraulic pressure generation chamber of the clutch mask cylinder by connecting a pipe from the clutch mask cylinder (not shown) to the connection hole 25 .

In addition, in FIG. 1, 26 is a bleeder device used when air is removed from the piping system including the pressure chamber 5; 27 is a bleeder device;
The mounting parts for fixing the clutch operating cylinder 1 to the vehicle are each shown.

The operation of the clutch operating cylinder 1 having the above configuration will be described below.

Now, in a clutch device (not shown), if the clutch is completely connected, the clutch operating cylinder 1 is in the state shown, and the clutch release arm 15 is pushed as far as the clutch operating cylinder 1 due to the biasing force of the spring of the clutch device. The actuating piston 4 and bushing rod 16 are biased to a position close to .
Due to the biasing force of the spring 24, the clutch release arm 1
5 side, and is in contact with the right cuff latch release arm 15 of the bushing rod 16, and the left side is in contact with the movable member 10.

At this time, the pressure inside the pressure chamber 5 is equal to atmospheric pressure, the vibration damping material 9 is in substantially its original shape, and the movable member 10 is engaged with the retainer 11.

In this state, when the driver depresses the clutch pedal, hydraulic pressure is transmitted from the clutch mask cylinder to the pressure chamber 5, and the pressure in the pressure chamber 5 causes the actuating piston 4 to begin to move to the right.

As the actuating piston 4 moves to the right, the movable member 10 and the bushing rod 16 begin to move to the right via the vibration damping material 9.

At this time, the vibration damping material 9 is slightly deformed, but the annular space 1
It does not deform to the extent that 3 disappears.

Thereafter, when the actuating piston 4 moves sufficiently to the right, the bushing rod 16 also moves to the right, so that the clutch release arm 15 is moved in the direction shown by arrow A in the figure, that is, in the direction away from the clutch operating cylinder 1. oscillates to release the frictional engagement of the clutch plate,
Eventually the clutch will be disengaged.

Conversely, when connecting the clutch, when the driver releases the clutch pedal, the pressure inside the pressure chamber 5 drops to atmospheric pressure, and members such as the actuating piston 4, bushing rod 16, and clutch release arm 15 are released. , it returns to the state shown in FIG. 1 due to the biasing force of the spring within the clutch device.

In other words, the biasing force of the spring in the clutch device
The internal pressure overcomes the urging force that tries to move the actuating piston 4, causing the clutch release arm 15 to swing in the direction indicated by arrow B in the figure, that is, in the direction toward the clutch operating cylinder 1, and the clutch release arm 15 is moved toward the clutch operating cylinder 1. Pressed by the arm 15, members such as the bushing rod 16 and the actuating piston 4 are moved to their original positions.

As a result of this operation, the clutch is eventually engaged.

In this series of operations of disconnecting and connecting the clutch described above, vibrations are generated within the clutch device, so that the clutch release arm 15 also vibrates, and this vibration is transmitted toward the actuating piston 4 via the bushing rod 16. come.

However, in the above-mentioned embodiment, although the bushing rod 16 is in contact with the movable member 10, since the vibration damping material 9 is disposed between the movable member 10 and the actuating piston 4, there is no vibration from the clutch release arm 15. Even if the movable member 10 reciprocates within the recess B due to the transmitted vibrations, the vibration damping material 9 repeatedly deforms to increase or decrease the volume of the annular space 13 to attenuate the propagation of the vibrations. does not reciprocate within the cylinder hole 2 following the vibrations of the clutch release arm 15.

That is, the vibration transmitted from the clutch release arm 15 toward the actuating piston 4 is damped by the vibration damping material 9.

Furthermore, even if some vibration is transmitted to the operating piston 4, the fluid pressure pulsations generated in the piping system between the clutch operating cylinder 1 and the clutch mask cylinder are weak and may cause a sense of uneasiness to the driver. Or, it is only to the extent that the sealing member of each sealing part is not damaged.

Furthermore, the above-described embodiments provide various useful effects as described below.

In other words, the vibration damping material 9 is made of synthetic rubber, and since this vibration damping material 9 is placed in the recess 8 of the actuating piston 4, the vibration damping is effective when considering the entire device or system. Compared to the case where the member 9 is disposed as a separate device from the clutch operating cylinder 1, it is possible to simplify and reduce the weight, and the work when installing it on an actual vehicle is also easier.

Furthermore, since the vibration damping material 9 is disposed within the recess 8 of the actuating piston 4, water or oil will not adhere to the vibration damping material 9, and it will not be damaged by tools or the like. The function of the vibration damping material 90 can be fully exhibited.

Also, clutch release arm 15 and bushing rod 1
Due to the swinging of the bushing rod 16, the actuating piston 4 may fall and slide within the gap between the cylinder hole 2 and the cylinder hole 2. When the vibration is transmitted to the working piston 4 via the vibration damping material 9, the vibration is weakened so that the working piston 4 does not collapse violently within the cylinder hole 2 due to the deformation of the vibration damping material 9.

By preventing the operating piston 4 from falling violently, uneven wear when the operating piston 4 slides within the cylinder hole 2 can be reduced, and the reliability or certainty in the original operation of the clutch operating cylinder 1 is improved.

Incidentally, such a phenomenon is noticeable when the difference between the outer diameter of the movable member 10 and the inner diameter of the recess 8 is a relatively large value. In order to prevent the movable member 10 from being bitten, a ring made of metal or synthetic resin having a cross-sectional shape to prevent biting is provided in the same place, or the movable member 10 is arranged on the axis. The vibration damping material 9 and the movable member 10 are fitted together through axially extending projections and depressions, or are integrally molded.

As described above, the clutch operating cylinder of the present invention has the useful effect of sufficiently damping vibrations with a simple structure by disposing the vibration damping material between the operating piston and the bushing rod. It is something.

[Brief explanation of the drawing]

The figure is a side sectional view of a clutch operating cylinder that is an embodiment of the present invention. 1...Clutch operating cylinder, 4
・・・・・・Operating piston, butt ・・・Recess, 9...
... Vibration damping material, 10 ... Movable member, 11
...Removal stopper, 16...Butsch rod.

Claims (1)

[Scope of utility model registration request] A cylinder body with a cylinder hole bored therein, an actuation piston that is slidably fitted into the cylinder hole and has a pressure chamber at both bottoms that communicates with the mask cylinder, and is arranged between the actuation piston and the clutch release arm. In the clutch operating cylinder, the clutch operating cylinder is equipped with a bushing rod, and when the pressure generated in the mask cylinder is transmitted to the pressure chamber, the actuating piston moves and swings the clutch release arm via the bushing rod, The operating piston is provided with a recess facing the bushing rod, and a vibration damping material is inserted into the bottom side of the recess, and a movable member whose one end is in elastic contact with the vibration damping material and whose other end is capable of contacting with the bushing rod. A clutch operating cylinder which is movably inserted into the recess with a retainer.