JPH0262429A - Clutch operation device - Google Patents

Abstract

PURPOSE:To permit satisfactory setting of set load and cut-off control corresponding to the amount of a pedal operation by driving a cam with an electric motor to move a release bearing so that the electric motor is controlled corresponding to as difference between detecting signals by a displacement detector and a angle-detector. CONSTITUTION:The operation of a clutch pedal 21 moves the pedal 21 rotationally around a shaft 22, so that detecting signals by angle-detector 27 become bigger to cause the difference thereof from the detecting signals by a displacement detector 28, therefore a motor control device 29 judges that the detecting signals by the detector 27 is bigger to bring a motor 18 into positive run. Then, a rotational mover 13 is moved by rotational force of the motor 18 to transmit a cam 5 for left movement. Then, left movement of the cum 5 causes bigger signals by the detector 28 to lessen a difference from signals by detector 27 into zero, so that the control device 29 stops the motor 18. The pedal 21 with operation up to the stroke limit causes the cum 5 to be moved up to the moving limit and a release bearing 7 to be pushed to the left, so that a lever 8 is pushed to the left to cut off a clutch completely.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a clutch operating device that moves a release bearing by operating a clutch pedal.

(Prior art) Conventional clutch operating devices include hydraulic ones that move the release bearing via a hydraulic cylinder device, etc. when the clutch pedal is operated, and clutch pedals that connect the clutch pedal to the release bearing via wires, link mechanisms, etc. There were mechanical types.

Further, in the conventional clutch operating device, the clutch pedal is biased by one return spring.

(Problems to be Solved by the Invention) In the conventional configuration described above, in the case of a hydraulic type, there is a disadvantage that the device becomes large and requires a large amount of installation space. In addition, there was a risk that oil leakage would occur due to damage to the pressure oil piping, resulting in inoperability.

Further, in the case of a mechanical type, there is a problem in that the relationship between the amount of depression of the clutch pedal and the degree of clutch disengagement changes due to the elongation of the wire or the like.

In addition, in both hydraulic and mechanical systems, if the set load for engaging and disconnecting the clutch is large, the pressing force on the clutch pedal increases, so there is the inconvenience that the set load cannot be set sufficiently large. .

Furthermore, since the clutch pedal was biased by a single return spring, it was not possible to set the reaction force and return force of the clutch pedal to optimize the clutch pedal operation feeling and clutch connection pattern. There was an inconvenience.

(Means for Solving the Problems) In order to solve the above problems, the clutch operating device of the present invention includes a cylindrical cam that has a spiral groove on its outer circumferential surface and is supported so as to be movable only in the axial direction. a rotary body supported rotatably around an axis and having a plurality of balls or rollers rotatably attached to the inner periphery at appropriate intervals in the circumferential direction to fit into the grooves of the cam; an electric motor that reversibly rotates a moving body; a displacement detector that detects the displacement of the cam in the axial direction; an angle detector that detects the rotation angle of the clutch pedal; a detection signal of the displacement detector; The motor controller is provided with a motor control device that manually inputs the detection signal of the angle detector and drives the motor according to the difference between these detection signals, and the cam is connected to a release bearing that connects and disconnects the clutch.

In addition to the above-mentioned configuration, another clutch operating device of the present invention biases the clutch pedal with a plurality of springs, so that the clutch pedal can be operated to optimize the operating feeling of the clutch pedal and the clutch connection pattern. The structure is such that a reaction force and a return force are set.

(Operation) The displacement detector detects the displacement of the cam in the axial direction, and the angle detector detects the rotation angle of the clutch pedal. The motor control device drives the motor according to the difference in rain detection signals. When the rotating body is rotationally driven by the electric motor, the rotating force is converted into a moving force in the axial direction of the cam via a ball or roller, and the release bearing moves together with the cam to connect and disconnect the clutch.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.

FIG. 1 is a cross-sectional view of the essential parts of the main body of a clutch operating device according to an embodiment of the present invention. Reference numeral 1 indicates an output shaft of the clutch, and this output shaft 1 is supported around the axis by a housing 3 via a bearing 2. It is rotatably supported. A cylindrical portion 3a that loosely fits around the outer periphery of the output shaft 1 is integrally protruded from the housing 3, and a cylindrical body 4 is fitted and fixed to the outer periphery of the cylindrical portion 3a. A substantially cylindrical cam 5 is provided on the outer periphery of the cylindrical body 4.
is loosely fitted into the cam 5, and a substantially L-shaped engagement protrusion 6 is integrally provided at one end of the cam 5. The engagement protrusion 6 can be engaged with a release bearing 7 that loosely fits on the outer periphery of the output shaft 1, and the release bearing 7 can come into contact with the inner periphery of the clutch lever 8.

A rotation stopper groove 9 along the axial direction is formed on the inner periphery of the intermediate portion of the cam 5 in the axial direction. A protruding portion of a rotatably mounted roller 10 is fitted. A spiral groove 11 is formed on the outer periphery of the other end of the cam 5. A substantially cylindrical rotating body 13 is loosely fitted on the outer periphery of the other end of the cam 5, and this rotating body 13 is supported by the cylindrical body 4 via a bearing 14 so as to be freely rotatable around its axis. . Rotating body 1
A plurality of balls 15 are rotatably mounted on the inner circumference of the cam 3 at appropriate intervals in the circumferential direction, and the protruding portions of these balls 15 fit into the grooves 11 of the cam 5. Rotating body 13
Teeth 16 are formed on the outer periphery of the pinion 17, and these teeth 16 mesh with a pinion 17. The pinion 17 is fitted and fixed to the outer periphery of an output shaft 18a of a motor 18 attached to the housing 3, and the motor 18 can be switched between forward rotation and reverse rotation. The cam 5, rotating body 13, electric motor 18, etc. are covered by a cover 19 which has one end fixed to the release bearing 7 and the other end fixed to the housing 3, and the cover 19 is provided with a bellows-shaped extensible part 19a. It is configured to be expandable and contractible in the axial direction.

FIG. 2 is a schematic configuration diagram of a clutch pedal portion of a clutch operating device according to an embodiment of the present invention, in which reference numeral 21 denotes a clutch pedal provided at the driver's seat;
1 is rotatable at a predetermined angle around an axis 22 along the horizontal direction. The clutch pedal 21 is biased in the counterclockwise direction in FIG. 1 by a return spring 23 made of a coil spring and a feeling adjustment spring 24 made of a coil spring.

FIG. 3 is an electric circuit diagram of a clutch operating device according to an embodiment of the present invention. Reference numeral 27 is an angle detector for detecting the rotation angle of the clutch pedal 21. It consists of a variable resistor installed between 22 and 22. A displacement detector 28 detects the displacement of the cam 5, that is, the position in the axial direction, and the displacement detector 28 is constituted by, for example, a variable resistor installed between the cylindrical body 4 and the cam 5. The output ends of the angle detector 27 and the displacement detector 28 are connected to the input end of a motor control device 29, and the output end of the motor control device 29 is connected to a power terminal of the electric motor 18. The motor control device 29 compares the detection signal from the angle detector 27 and the detection signal from the displacement detector 28, and rotates the motor 18 forward or reverse depending on the relative difference between these detection signals.

Next, the effect will be explained. Now, as shown in the figure, the clutch pedal 21 is not depressed, and the cam 5 is located at the right movement limit in FIG. 1, and in this state, the detection signals of the angle detector 27 and displacement detector 28 are large shall be equal to each other and minimum. In this state, the clutch is engaged. When the clutch pedal 21 is depressed, the clutch pedal 21 pivots about the shaft 22 against the biasing force of the springs 23,24. As a result, the detection signal of the angle detector 27 increases and a relative difference with the detection signal of the displacement detector 28 occurs.
It is determined that the detection signal of is larger than the detection signal of the displacement detector 28, and the electric motor 18 is rotated in the normal direction. As a result, the rotational force of the electric motor 18 is transmitted to the rotating body 13 via the output shaft 18a and the pinion 17, the rotating body 13 rotates around the axis, and this rotational force is transmitted to the cam 5 via the ball 15. Then, the cam 5 moves to the left in FIG. That is, the ball 15 is fitted into the spiral groove 11 of the cam 5, and the cam 5
Since the rotation of the rotating body 13 around the axis is prevented by the roller 10, the rotational force of the rotating body 13 is converted into a force for moving the cam 5 in the axis direction.

When the cam 5 moves to the left in FIG. 1, the detection signal from the displacement detector 28 increases, and the difference between it and the detection signal from the angle detector 27 gradually decreases until the difference becomes zero.

As a result, the motor control device 29 stops driving the electric motor 18.

That is, there is a one-to-one correspondence between the rotation angle of the clutch pedal 21 and the displacement amount of the cam 5 in the axial direction, and the cam 5 moves to the left in FIG. 1 according to the amount of depression of the clutch pedal 21. do. Therefore, when the clutch pedal 21 is depressed to its stroke limit, the cam 5 moves to the left travel limit in FIG. 1, and at this time pushes the release bearing 7 to the left. is pushed to the left and the clutch is completely disengaged.

After depressing the clutch pedal 21, the clutch pedal 21
When you release your foot from the clutch pedal 21, the springs 23, 24
The motor controller 29 rotates the motor 18 in the reverse direction because the biasing force returns the motor 18 to its original position and the detection signal from the angle detector 27 becomes smaller than the detection signal from the displacement detector 28 . As a result, the cam 5 moves to the right in FIG. 1 and returns to the right limit of movement.

At this time, the engagement protrusion 6 of the cam 5 engages with the release bearing 7, so the release bearing 7 moves together with the cam 5.

In this way, the electric motor 18 drives the cam 5 to move the release bearing 7, so even if the set load for engaging and disconnecting the clutch is large, the depression force on the clutch pedal 21 does not become large, so that the set load can be sufficiently controlled. Can be set large. Further, since the motor control device 29 controls the motor 18 so that the difference between the detection signal of the angle detector 27 and the detection signal of the displacement detector 28 becomes zero, the degree of clutch disengagement is determined according to the amount of depression of the clutch pedal 21. At the same time, there is no risk of oil leakage due to damage to the pressure oil piping, which would cause the clutch pedal to become inoperable, unlike in the case of a hydraulic type, and unlike a mechanical type, the clutch pedal can be easily controlled due to wire stretching, etc. There is no change in the relationship between the amount of depression of the clutch and the degree of clutch disengagement. Further, since the rotating body 13 is rotated by the electric motor 18 to move the cam 5 in the axial direction, the device can be made compact and space saving can be achieved. Further, since the rotational force of the rotating body 13 is converted into a force for moving the cam 5 in the axial direction via the ball 15, the efficiency of force conversion is high, and changes over time such as wear are small. In addition, since the clutch pedal 21 is biased by two springs, a return spring 23 and a feeling adjustment spring 24, the clutch pedal 21 is biased so that the operating feeling of the clutch pedal 21 and the clutch connection pattern are optimized. 21 reaction force and return force can be set.

(Another Example) In the above example, the rotational force of the rotating body 13 is
Although the force is converted into a moving force in the axial direction of the cam 5 via the ball 15, the present invention is not limited to this configuration, and a roller may be used instead of the ball 15.

Further, in the above embodiment, the rotation of the cam 5 is controlled by the roller 10.
However, the present invention is not limited to this configuration, and instead of the roller 10, a ball or a pin may be used.

Further, in the above embodiment, the clutch pedal 21 is biased by the two springs 23 and 24, but the present invention is not limited to such a configuration, and the clutch pedal 21
may be biased by three or more springs.

Further, in the above embodiment, the displacement detector 28 directly detects the displacement of the cam 5, but the present invention is not limited to such a configuration, and the displacement detector 28 detects the displacement of the release bearing 7. It's okay.

Further, in the above embodiment, variable resistors are used as the angle detector 27 and the displacement detector 28, and the clutch pedal 2
Although the detection signal is increased by pressing the pedal in step 1, the present invention is not limited to such a configuration, and various control methods can be adopted.

(Effects of the Invention) As explained above, according to the present invention, the cam is driven by the electric motor to move the release bearing, so even if the set load for connecting and disconnecting the clutch is large, the depression force on the clutch pedal is large. Therefore, the set load can be set sufficiently large.

In addition, since the electric motor control device controls the electric motor according to the difference between the detection signal of the angle detector and the detection signal of the displacement detector, it is possible to accurately control the degree of clutch disengagement according to the amount of depression of the clutch pedal. Unlike a hydraulic type, there is no risk of oil leaking due to damage to the pressure oil piping, resulting in inoperability, and unlike a mechanical type, the amount of clutch pedal depression and clutch disengagement can be controlled by stretching of the wire, etc. There is no change in the relationship between them. Further, since the moving body is rotated by an electric motor to move the cam in the axial direction, the device can be made compact and space-saving can be achieved. Furthermore, since the same force of the rotating body is converted into a moving force in the direction of the axis Jj of the cam via the ball or roller, the force conversion efficiency is high and there is little change over time such as wear. Also, if the clutch pedal is biased by multiple springs,
The reaction force and return force of the clutch pedal can be set so that the operating feeling of the clutch pedal and the clutch connection pattern are optimized.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the main body of a clutch operating device according to an embodiment of the present invention, FIG. 2 is a schematic diagram of the clutch pedal portion of the clutch operating device, and FIG. 3 is a schematic diagram of the clutch operating device. It is an electrical circuit diagram. 5...Cam, 7...Release bearing, 11...
・Groove, 13...Rotating body, 15...Ball, 18...
・Electric motor, 21...Clutch pedal, 23.24...
・Spring, 27... Angle detector, 28... Displacement detector, 29... Motor control device Fig. 1 Fig. 2 Fig. 3

Claims (1)

[Claims] 1. A cylindrical cam having a spiral groove on its outer circumferential surface and supported so as to be movable only in the axial direction; a rotating body in which a plurality of balls or rollers that fit into grooves of the cam are rotatably attached at appropriate intervals in the circumferential direction; an electric motor that reversibly rotates the rotating body; and an axis of the cam. A displacement detector that detects a displacement in a direction, an angle detector that detects a rotation angle of a clutch pedal, a detection signal of the displacement detector and a detection signal of the angle detector are input, and a difference between these detection signals is input. A clutch operating device characterized in that the cam is connected to a release bearing that connects and disconnects the clutch. 2. The clutch pedal is biased by a plurality of springs to set the reaction force and return force of the clutch pedal so that the operating feeling of the clutch pedal and the clutch connection pattern are optimized. Clutch operating device according to scope 1.