JPH063230B2 - Vehicle clutch operation mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a clutch operating mechanism for a vehicle.

[Prior Art] Conventionally, in order to deal with thermal deformation of the facing due to an increase in heat load of the clutch, delicate hysteresis operation of the conical disc, and the like, it has been desired to increase the disengagement margin of the clutch. Further, while the engine torque is increased, the final gear transmission ratio tends to be reduced in order to reduce fuel consumption, so that the clutch mechanism is required to have a larger friction plate diameter and a plurality of friction plates. It is necessary to increase the allowance of the clutch.

In order to increase the disengagement allowance of the clutch, it is conceivable to increase the stroke of the clutch pedal, but this increases the clutch disengagement point and also increases the stroke, resulting in poor operability.

Further, if a booster is attached to reduce the lever ratio of the clutch mechanism and reduce the pedal effort, the response becomes too sharp and the stroke in the half-clutch region becomes narrow. That is,
As shown by line 21 in FIG. 3, it is possible to secure a sufficiently large clutch disengagement margin with a small clutch pedal stroke, as compared with the conventional one shown by line 22 in FIG. The stroke S1 becomes narrower than the conventional stroke S2, making it difficult to smoothly start the vehicle.

Further, if only the amount of disengagement of the clutch is increased with the same stroke of the clutch pedal, the disengagement point of the clutch becomes high (the stroke until starting disengagement becomes small), which also impairs operability.

[Problems to be Solved by the Invention] In view of the above problems, an object of the present invention is to operate a clutch in which a large clutch disengagement margin is obtained while sufficiently securing a stroke in a half-clutch region that affects the operability of the clutch. To provide a mechanism.

[Means for Solving the Problems] Therefore, according to the configuration of the present invention, a master cylinder device in which a base end portion of a clutch pedal and an arm extending rearward are coupled to a rotation shaft supported on the vehicle body side and driven by the arm In a clutch operating mechanism of a vehicle in which a clutch is disengaged by a hydraulic pressure from a shaft, a long hole extending in a longitudinal direction is provided in a radius, and a control lever can be pivoted forward and downward with respect to the pivot shaft on the vehicle body side. The rear end of the control lever and the push rod of the master cylinder device are connected to a pin that is supported and slidably engaged with the elongated hole.

[Operation] As the stroke of the clutch pedal increases, the control lever rotates and moves the pin along the elongated hole of the arm in a direction away from the rotation axis.

At this time, the lever ratio of the arm to the clutch pedal is gradually reduced, and a sufficiently wide half-clutch region and a large clutch disengagement are given within the limited stroke of the clutch pedal.

[Embodiment of the Invention] When the present invention is described based on an embodiment, as shown in FIG. 1, the clutch pedal 2 rotates together with the rotation shaft 6 with respect to the bracket 3 fixed to the vehicle body side. Supported as possible,
An arm 9 is connected to the rotary shaft 6 and extends rearward and has a longitudinal slot 8.

The rear end of the control lever 5 is connected to one end of a pin 7 slidably inserted in the long hole 8. The front end of the control lever 5 is rotatably supported by the bracket 3 by the support shaft 4. Spindle 4
Are arranged in front of and below the rotary shaft 6. The other end of the pin 7 is connected to the tip of the push rod 10 that abuts the piston of the master cylinder device 12.

The master cylinder device 12 has a piston fitted inside a cylinder fixedly supported by a bracket 3. The master cylinder device 12 pumps hydraulic oil filled in the cylinder from an oil tank (not shown) to a known slave cylinder, and a clutch. It is designed to shut off the mechanism.

The piston of the master cylinder device 12 is provided with a known recess on the outer end surface, and the base end of the push rod 10 is pressed into the recess.

The operation of the device of the present invention will be described. When the clutch is engaged, the arm 9 and the control lever 5 move to the second position.
The state is shown by the solid line in the figure. When the clutch pedal 2 is depressed, the arm 9 is rotated clockwise together with the rotation shaft 6. At this time, the control lever 5 also rotates clockwise around the support shaft 4, and the pin 7 moves along the elongated hole 8.

Therefore, the arm 9 that pushes down the push rod 10
Of the push rod 10 gradually increases, and accordingly, the operation amount of the push rod 10 gradually increases. That is, as shown by the line 23 in FIG. 3, when the clutch pedal 2 is depressed,
First, the play stroke is sent, and when the clutch breaking point is reached, the clutch mechanism is activated and the stroke S3 becomes the half-clutch region. When the clutch pedal 2 is further stepped on, as the lever ratio of the arm 9 to the clutch pedal 2 becomes smaller, the disengagement margin of the clutch sharply increases,
Gives a large enough disengagement of the clutch.

[Effects of the Invention] As described above, the present invention has a non-linear characteristic that the lever ratio of the arm to the clutch pedal is gradually reduced as the stroke of the clutch pedal is increased by the control lever. Within the stroke of the clutch pedal, it is possible to obtain a sufficiently wide half-clutch region and a large clutch disengagement margin. Therefore, particularly when the vehicle is started, a smooth operation of the clutch pedal can be obtained, and a clutch disengagement defect can be prevented.

Compared with the conventional clutch operation mechanism, the control lever moves the connecting point between the arm and the push rod of the master cylinder device, so that the structure is simple and the increase in cost can be suppressed to a minimum.

[Brief description of drawings]

FIG. 1 is a side view of a clutch operating mechanism according to the present invention, and FIG.
FIG. 3 is a side view for explaining the operation of the clutch operating mechanism,
The figure is a diagram showing the operating characteristics of the clutch operating mechanism in comparison with a conventional example. 2: Clutch pedal, 3: Bracket, 4: Support shaft, 5:
Control lever, 6: rotating shaft, 7: pin, 8: long hole, 9: arm, 10: push rod, 12: master cylinder device

Claims (1)

[Claims] 1. A vehicle clutch in which a base end portion of a clutch pedal and an arm extending rearward are coupled to a rotating shaft supported on a vehicle body side, and the clutch is disengaged by hydraulic pressure from a master cylinder device driven by the arm. In the operating mechanism,
The arm is provided with a long hole extending in the longitudinal direction, and a control lever is rotatably axially supported at a portion in front of and below the rotary shaft on the vehicle body side, and a pin slidably engaged with the long hole is provided. A clutch operating mechanism for a vehicle, wherein a rear end of a control lever and a push rod of a master cylinder device are connected to each other.