JP2017044320A - Clutch control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clutch control system capable of performing an operation of a clutch operating member more easily than that of the prior art.SOLUTION: A clutch control device 1 includes a first cylinder 2, a first piston 3, a clutch pedal 9, a second cylinder 4, a second piston 5, a connecting passage 8 for connecting the first cylinder 2 with the second cylinder 4, a release fork 10, a third cylinder 6, a third piston 7, a coil spring 16, a first valve 19 for communicating the second cylinder 4 with the third cylinder 6 when a fluid pressure in the second cylinder 4 is more than a specified value, and a second valve 20 for allowing working fluid in the third cylinder 6 to move into the second cylinder 4 when fluid pressure in the second cylinder 4 is lower than fluid pressure in the third cylinder 6. When fluid pressure in the second cylinder 4 becomes higher than a specified value to cause the first valve 19 to open and the fluid pressure in the second cylinder 4 is transmitted to the working fluid in the third cylinder 6, the third piston 7 advances to press the second piston 5 in its advancing direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a clutch operating device for turning on / off a clutch in an automobile, a motorcycle, or the like.

  2. Description of the Related Art Conventionally, a clutch operating device for turning on / off a clutch in an automobile, a motorcycle or the like via hydraulic oil is known (for example, see Patent Document 1).

Utility Model Registration No. 2571170

  In recent years, the capacity of the clutch responsible for connecting / disconnecting power transmission between the prime mover and the transmission has increased with the increase in the output of the prime mover. As the clutch capacity increases, there is a problem that it becomes difficult for the clutch operator for operating the clutch to move.

  In view of the above points, an object of the present invention is to provide a clutch operating device capable of operating a clutch operator more easily than in the past.

In order to achieve the above object, the present invention provides:
A first cylinder filled with a working fluid;
A first piston slidable in the first cylinder;
A clutch operator connected to the first piston;
A second cylinder filled with a working fluid;
A second piston slidable in the second cylinder;
A connection path connecting the first cylinder and the second cylinder so that the working fluid can move between the first cylinder and the second cylinder;
A release portion that can be pressed by the second piston,
A clutch operating device that operates the clutch by operating the release unit by pushing the first piston by operating the clutch operator to generate the fluid pressure of the working fluid and moving the second piston in the second cylinder. Because
A third cylinder filled with a working fluid;
A third piston slidable in the third cylinder;
A biasing portion that biases the third piston in the backward direction;
A first valve for communicating the second cylinder and the third cylinder when the fluid pressure in the second cylinder is equal to or greater than a predetermined value;
A second valve that allows the working fluid in the third cylinder to move into the second cylinder when the fluid pressure in the second cylinder is lower than the fluid pressure in the third cylinder;
When the fluid pressure in the second cylinder exceeds a predetermined value and the first valve opens and the fluid pressure in the second cylinder is transmitted to the working fluid in the third cylinder, the third piston advances and the second The piston is pressed in the traveling direction of the second piston, and the urging portion urges the third piston in the backward direction with an urging force equivalent to a predetermined value of the fluid pressure when the first valve opens. And

  According to the present invention, when the fluid pressure becomes a predetermined value or more, the third piston in the third cylinder is actuated to press the second piston. For this reason, when the fluid pressure exceeds a predetermined value, the area of the piston receiving the fluid pressure increases, and the operation of the clutch operator becomes easy.

  In the present invention, the urging portion generates a pressure in the third cylinder that is equivalent to a predetermined value of the fluid pressure in the second cylinder when the first valve opens when the third piston advances. It is preferable that the third piston be urged in the backward direction by a force.

  When the third piston advances, the working fluid in the second cylinder moves into the third cylinder. Therefore, when the fluid pressure of the working fluid in the second cylinder is changed from the state above the predetermined value to the state below the predetermined value, the working fluid moved from the second cylinder into the third cylinder again becomes the second fluid. If it does not return to the cylinder, the stroke length of the second piston will be changed by the amount of the working fluid in the second cylinder when the second piston moves back and forth next time.

  Therefore, if the urging force of the urging portion is set as described above, when the first valve shifts from the opened state to the closed state, the third piston is immediately retracted by the urging force of the urging portion, The working fluid in the three cylinders immediately returns to the second cylinder. Thereby, a change in the stroke length of the second piston can be prevented.

  Further, in the present invention, the second cylinder is disposed in the third cylinder, the third piston is formed into an annular body having an insertion hole through which the second cylinder can be inserted, and the third piston is externally fitted to the second cylinder. Can be made.

Explanatory drawing which shows 1st Embodiment of the clutch operation apparatus of this invention. The graph which shows the relationship between the clutch pedal stroke of the clutch operating device of 1st Embodiment, and a clutch pedal load. Explanatory drawing which shows the operating state in less than the predetermined pressure of the clutch operating device of 1st Embodiment. Explanatory drawing which shows the operating state above the predetermined pressure of the clutch operating device of 1st Embodiment. Explanatory drawing which shows a state when the clutch operating device of 1st Embodiment changes from the operating state more than the predetermined pressure to the operating state below a predetermined pressure. Explanatory drawing which shows the state which the piston returns in the state below the predetermined pressure of the clutch operating device of 1st Embodiment. Explanatory drawing which shows the state which the piston returned in the clutch operation apparatus of 1st Embodiment. Explanatory drawing which shows 2nd Embodiment of the clutch operation apparatus of this invention. Explanatory drawing which shows the 1st valve of embodiment.

  A clutch operating device according to an embodiment of the present invention will be described with reference to the drawings. Referring to FIG. 1, a clutch operating device 1 according to the present embodiment includes a first cylinder 2 filled with hydraulic oil as a working fluid, a first piston 3 slidable in the first cylinder, and a working fluid. The second cylinder 4 filled with hydraulic oil, the second piston 5 slidable in the second cylinder 4, the third cylinder 6 filled with hydraulic oil as the working fluid, and the third cylinder 6 A third piston 7 slidable inside is provided.

  The first cylinder 2 and the second cylinder 4 are connected by a tubular connection path 8 so that hydraulic oil as a working fluid can move between them. A clutch pedal 9 serving as a clutch operator is connected to the first piston 3.

  When a clutch pedal 9 as a clutch operator is depressed, the first piston 3 is pushed in, fluid pressure is output from the first cylinder 2, and the second piston 5 in the second cylinder 4 advances.

  The leading end of the second piston 5 in the advancing direction is in contact with a release fork 10 as a release portion. A release fork 10 serving as a release portion presses a finger portion 12a on the radially inner side of a diaphragm spring 12 having a function of a pressure lever via a release bearing 11, and thereby a radial direction of the diaphragm spring 12 is pressed. By curving the outer side 12b, the pressure of the clutch disk 14 of the pressure plate 13 is released, and the state where the clutch disk 14 is pressed against the rotating body 15 such as a flywheel is released.

  The third cylinder 6 is disposed so as to cover the second cylinder 4. In other words, the second cylinder 4 is disposed in the third cylinder 6. The third piston 7 is an annular body provided with an insertion hole 7a at the center thereof. The second cylinder 4 is inserted through the insertion hole 7 a of the third piston 7. In other words, the third piston 7 is fitted on the second cylinder 4.

  The third piston 7 is connected to the proximal end portion of the third cylinder 6 by a coil spring 16 as an urging portion. The third piston 7 is urged by the coil spring 16 in the backward direction on the base end side.

  On the peripheral wall of the second cylinder 4, there are provided first and second communication holes 17, 18 for communicating the inside of the second cylinder 4 and the inside of the third cylinder 6. The first communication hole 17 is provided with a first valve 19 that is positioned on the outer peripheral side of the second cylinder 4 and closes the first communication hole 17.

  As shown in FIG. 9, the first valve 19 includes a valve main body 102 that closes the first communication hole 17 from the outer peripheral side of the second cylinder 4, a bottomed cylindrical case 104 that covers the valve main body 102, and a valve main body 102. And an elastic part 106 made of a coil spring that urges the valve body 102 toward the first communication hole 17.

  The elastic portion 106 is set so that the valve body 102 opens the first communication hole 17 against the urging force of the elastic portion 106 when the hydraulic pressure in the second cylinder 4 becomes a predetermined value or more. A plurality of slits 104 a are provided on the peripheral wall of the case 104.

  The second communication hole 18 is provided with a second valve 20 that is positioned on the inner peripheral side of the second cylinder 4 and closes the second communication hole 18. The second valve 20 also closes the second communication hole 18 from the inner peripheral side of the second cylinder 4 and is configured in the same manner as the first valve 19 shown in FIG. 9 except that the urging force of the elastic portion is different. Yes. When the fluid pressure in the third cylinder 6 exceeds the fluid pressure in the second cylinder 4, the biasing force of the elastic part of the second valve 20 is such that the valve body opens the second communication hole 18, It is set to allow the working fluid in the cylinder 6 to move into the second cylinder 4.

  FIG. 2 shows the stroke of the clutch pedal 9 and the load required to move the clutch pedal 9. The horizontal axis represents the stroke of the clutch pedal 9, and the vertical axis represents the load of the clutch pedal 9. An upper white arrow indicates an area where the third piston 7 presses the second piston 5 as an operating area, and an area where the third piston 7 does not press the second piston 5 as an inactive area. A solid line indicates the load change characteristic of the present embodiment, and a broken line indicates the conventional load change characteristic.

  As can be seen from FIG. 2, the load peak is suppressed lower in the present embodiment than in the conventional broken line. In the present embodiment, the predetermined value of the fluid pressure at which the first valve 19 is opened is a load peak higher than that in the past, as shown in FIG. 2 as an operation region in which the third piston 7 presses the second piston 5. Is set to decrease.

  FIG. 3 shows a state in which fluid pressure starts to be generated in the first cylinder 2 when the clutch pedal 9 starts to be depressed. The graph of FIG. 2 is displayed on the upper left of FIG. 3, and the stroke position and load of the clutch pedal 9 in the drawing are indicated by white circles. In FIG. 3, the load of the clutch pedal 9 is small, the fluid pressure in the second cylinder 4 is less than a predetermined value, and the first valve 19 is closed.

  FIG. 4 shows a state when the fluid pressure in the second cylinder 4 becomes a predetermined value or more. At this time, the first valve 19 is opened, the fluid pressure in the second cylinder 4 is also transmitted to the working fluid in the third cylinder 6, and the third piston 7 has a large diameter provided at the center of the second piston 5. The part 5a is pressed. As a result, the area of the fluid pressure acting on the second piston 5 is substantially increased, and the clutch pedal 9 can be depressed with a smaller load than before.

  FIG. 5 shows a case where the fluid pressure in the third cylinder 6 has shifted from a state of a predetermined value or more to a state of less than a predetermined value. At this time, the third piston 7 is pulled back by the coil spring 16 as the urging portion, the second valve 20 is opened, and the working fluid in the third cylinder 6 returns to the second cylinder 4.

  The urging force of the coil spring 16 as the urging portion is such that when the third piston 7 advances, a pressure equivalent to a predetermined value of the fluid pressure in the second cylinder 4 when the first valve 19 opens is the third cylinder. The third piston 7 is set so as to be urged in the backward direction by the urging force generated in the inside 6.

  When the third piston 7 advances, the working fluid in the second cylinder 4 moves into the third cylinder 6. Accordingly, when the fluid pressure of the working fluid in the second cylinder 4 is changed from a predetermined value or more to a predetermined value or less, the working fluid corresponding to the movement from the second cylinder 4 to the third cylinder 6 is obtained. If it does not return to the second cylinder 4 again, the stroke length of the second piston 5 changes by the amount of the working fluid in the second cylinder 4 when the second piston 5 advances or retreats next time.

  Therefore, by setting the urging force of the coil spring 16 as the urging unit to be equal to the fluid pressure when the first valve 19 is opened as described above, the first valve 19 is changed from the opened state to the closed state. When the transition is made, the third piston 7 is immediately retracted by the urging force of the coil spring 16 as the urging portion, and the working fluid in the third cylinder 6 immediately returns into the second cylinder 4. Thereby, a change in the stroke length of the second piston 5 can be prevented.

  FIG. 6 shows a state in which the clutch pedal 9 is returned. The fluid pressure in the second cylinder 4 also decreases, and the second piston 5 gradually returns in the proximal direction through the release bearing 11 and the release fork 10 by the urging force of the diaphragm spring 12, The working fluid in the cylinder 4 gradually moves to the first cylinder 2. At this time, the clutch disk 14 is pressed against the rotating body 15 while sliding.

  FIG. 7 shows a state where the clutch pedal 9 is completely returned and the driver does not step on the clutch pedal 9. At this time, the second piston 5 also returns to its original position, and the clutch disk 14 is also pressed against the rotating body 15 by the urging force of the diaphragm spring 12, and the rotation of the clutch disk 14 and the rotating body 15 is synchronized.

  According to the clutch operating device 1 of the first embodiment, when the fluid pressure becomes a predetermined value or more, the third piston 7 in the third cylinder 6 operates to press the second piston 5. For this reason, when the fluid pressure exceeds a predetermined value, the area of the piston receiving the fluid pressure increases, and the operation of the clutch pedal 9 as the clutch operator becomes easy.

  Further, in the case of the clutch using the diaphragm spring 12, when the clutch disk 14 is worn, the diaphragm spring 12 spreads in the direction of the rotation axis by the worn amount, and the clutch disk 14 is going to be separated from the rotating body 15. However, the radially outer portion of the diaphragm spring 12 is unlikely to warp, and the load on the clutch pedal 9 as the clutch operator gradually increases with wear of the clutch disk 14.

  According to the clutch operating device 1 of the present embodiment, the clutch pedal 9 can be easily operated even when the load of the clutch pedal 9 as the clutch operator due to such wear of the clutch disk 14 increases.

  FIG. 8 shows the clutch operating device 1 of the second embodiment. The clutch operating device 1 according to the second embodiment is configured such that the arrangement of the second cylinder 4 and the third cylinder 6 is reversed compared to that of the first embodiment. 6 is arranged in the second cylinder 4. The second piston 5 is formed with a recess 5b that is recessed from the base end surface toward the distal end side in the traveling direction. The tip of the third cylinder 6 is inserted into the recess 5b so that the third piston 7 can come into contact with the tip wall of the recess 5b. Other configurations are the same as those of the first embodiment.

  According to the clutch operating device 1 of the second embodiment, as in the case of the first embodiment, when the fluid pressure becomes a predetermined value or more, the third piston 7 in the third cylinder 6 is operated and the second piston 5 is moved. Press. For this reason, when the fluid pressure exceeds a predetermined value, the area of the piston receiving the fluid pressure increases, and the operation of the clutch pedal 9 as the clutch operator becomes easy.

DESCRIPTION OF SYMBOLS 1 Clutch operating device 2 1st cylinder 3 1st piston 4 2nd cylinder 5 2nd piston 5a Large diameter part 5b Recess 6 3rd cylinder 7 3rd piston 7a Insertion hole 8 Connection path 9 Clutch pedal (clutch operator)
10 Release Fork (Release Department)
11 Release Bearing 12 Diaphragm Spring 13 Pressure Plate 14 Clutch Disk 15 Rotating Body 16 Coil Spring (Biasing Part)
17 1st communication hole 18 2nd communication hole 19 1st valve 20 2nd valve 102 Valve main body 104 Case 104a Slit 106 Elastic part (coil spring)

Claims (3)

A first cylinder filled with a working fluid;
A first piston slidable in the first cylinder;
A clutch operator connected to the first piston;
A second cylinder filled with a working fluid;
A second piston slidable in the second cylinder;
A connection path connecting the first cylinder and the second cylinder so that the working fluid can move between the first cylinder and the second cylinder;
A release portion that can be pressed by the second piston,
A clutch operating device that operates the clutch by operating the release unit by pushing the first piston by operating the clutch operator to generate the fluid pressure of the working fluid and moving the second piston in the second cylinder. Because
A third cylinder filled with a working fluid;
A third piston slidable in the third cylinder;
A biasing portion that biases the third piston in the backward direction;
A first valve for communicating the second cylinder and the third cylinder when the fluid pressure in the second cylinder is equal to or greater than a predetermined value;
A second valve that allows the working fluid in the third cylinder to move into the second cylinder when the fluid pressure in the second cylinder is lower than the fluid pressure in the third cylinder;
When the fluid pressure in the second cylinder exceeds a predetermined value and the first valve opens and the fluid pressure in the second cylinder is transmitted to the working fluid in the third cylinder, the third piston advances and the second A clutch operating device that presses a piston in a traveling direction of a second piston. The clutch operating device according to claim 1,
The urging portion generates an urging force in the third cylinder that generates a pressure equivalent to a predetermined value of the fluid pressure in the second cylinder when the first valve opens when the third piston advances. And urging the third piston in the backward direction. The clutch operating device according to claim 1 or 2,
The second cylinder is disposed in the third cylinder;
The clutch operating device according to claim 1, wherein the third piston is an annular body having an insertion hole through which the second cylinder can be inserted, and is externally fitted to the second cylinder.