Release system

Abstract

To reduce a difference between a clutch engagement point and a clutch disengagement point.SOLUTION: A release system includes: a release device; a control valve; and an operation mechanism. The operation mechanism operates the control valve. The operation mechanism has an inner cable, an outer cable, a pressing link, an attachment link, and a holding mechanism. The inner cable has a first tip part. The first tip part integrally moves with a release piston. Control force is applied to the inner cable by operation of an operator. The outer cable has a second tip part. The pressing link has a pressing part. The pressing part presses a valve body. The pressing link is swingably attached to the control valve through a first joint part. The attachment link is swingably attached to the pressing link through a second joint part. The second tip part is fixed to the attachment link. The holding mechanism keeps a posture of the attachment link.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a release system. [Background technology]

[0002] A release device is attached to the clutch device to release the power transmission in the clutch device. Patent Document 1 discloses a release system having a release device and a control valve. The control valve is configured to supply air to the release device or stop the supply of air to the release device based on the relationship between the hydraulic pressure in the hydraulic chamber and a target pressure. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-047381 Summary of the Invention [Problem to be solved by the invention]

[0004] The release system described above may have a problem in that oil leaks occur in the release device, causing the clutch to slip due to the oil. For this reason, a configuration has been considered in which the control valve is operated using an inner cable, an outer cable, an attachment arm, and a pressing arm, without using hydraulic pressure. That is, the outer cable presses the attachment arm, which moves the pressing arm via the attachment arm, and the pressing arm presses the valve body of the control valve, thereby operating the control valve. However, when this configuration is adopted, there is a problem in that the difference between the clutch engagement point and clutch disengagement point of the clutch device becomes large, making clutch operation difficult.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a release system which can reduce the difference between the clutch engagement point and the clutch disengagement point. [Means for solving the problem]

[0006] The release system according to the first aspect includes a release device, a control valve, and an operation mechanism. The release device has a release piston and an air chamber. The control valve has a valve body. The control valve is configured to control the supply of air to the air chamber and the exhaust of air from the air chamber. The operation mechanism is configured to operate the control valve. The operation mechanism has an inner cable, an outer cable, a pressing link, an attachment link, and a holding mechanism. The inner cable has a first tip portion. The first tip portion is configured to move integrally with the release piston. The inner cable is configured to be subjected to an operation force by an operation by a driver. The outer cable has a second tip portion. The inner cable extends inside the outer cable. The pressing link has a pressing portion. The pressing portion is configured to press the valve body. The pressing link is swingably attached to the control valve via a first joint portion. The attachment link is swingably attached to the pressing link via a second joint portion. The second tip portion is fixed to the attachment link. The holding mechanism holds the posture of the attachment link.

[0007] As a result of extensive research, the inventors have found that by maintaining the posture of the attachment link, the difference between the clutch engagement point and the clutch disengagement point can be reduced. In more detail, when the outer cable is bent and arranged, the reaction force of the outer cable causes the attachment link to deviate from a predetermined posture. Therefore, when the clutch is operated, the attachment link returns to the predetermined posture or becomes displaced from the predetermined posture, increasing the difference between the clutch engagement point and the clutch disengagement point. In contrast, in the above release system, the attachment link is maintained in a predetermined posture by a retention mechanism, so that the difference between the clutch engagement point and the clutch disengagement point can be reduced.

[0008] The release system according to the second aspect is configured as follows in the release system according to the first aspect. The holding mechanism is an auxiliary link. The auxiliary link is swingably attached to the control valve via a third joint portion, and is swingably attached to the mounting link via a fourth joint portion. The auxiliary link extends parallel to the pressure link.

[0009] The release system according to the third aspect is the release system according to the second aspect, and is configured as follows: the auxiliary link has a main body portion, a first bent portion, and a second bent portion. The main body portion extends parallel to the pressure link. The first bent portion is bent from the main body portion and attached to the control valve. The second bent portion is bent in the opposite direction to the first bent portion and attached to the attachment link.

[0010] A release system according to a fourth aspect is the release system according to any one of the first to third aspects, and is configured as follows: the mounting link has a pair of extending portions and a connecting portion. The pair of extending portions are arranged at a distance from each other. The connecting portion connects the pair of extending portions. The second tip portion is fixed to the connecting portion.

[0011] A release system according to a fifth aspect is the release system according to the fourth aspect, and is configured as follows: the holding mechanism is an auxiliary link. The auxiliary link is swingably attached to the control valve via a third joint portion, and is swingably attached to the mounting link via a fourth joint portion. The auxiliary link extends parallel to the pressing link. Each extension portion has a first end and a second end. The first end is attached to the pressing link. The second end is connected to the connecting portion. The auxiliary link is attached to the extension portion between the first end and the second end. Effect of the Invention

[0012] According to the present invention, the difference between the clutch engagement point and the clutch disengagement point can be reduced. [Brief description of the drawings]

[0013] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] Overall view of the auxiliary link. [Figure 7] FIG. 4 is an explanatory diagram showing the operation of the release system. [Figure 8] FIG. 4 is an explanatory diagram showing the operation of the release system. [Figure 9] FIG. 4 is an explanatory diagram showing the operation of the release system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The release system according to this embodiment will be described below with reference to the drawings.

[0015] <Release system> 1, the release system 100 includes a release device 2, a control valve 3, and an operation mechanism 4. The release system 100 is configured to perform a release operation on a clutch device 101 by using air.

[0016] <Release device> The release device 2 uses air as a driving source. When the release device 2 presses the inner peripheral end of the diaphragm spring 102 of the clutch device 101, the power transmission state by the clutch device 101 is released.

[0017] The release device 2 has a cylinder 21, a release piston 22, a spring 23, an air chamber 24, a push ring 25, a release bearing 26, and a guide member 27.

[0018] The release piston 22 is disposed so as to be movable in the axial direction within the cylinder 21. In the release device 2, the axial direction means the direction along the rotation axis O of the clutch device 101. In addition, in the release device 2, the circumferential direction means the circumferential direction of a circle centered on the rotation axis O, and the radial direction means the radial direction of a circle centered on the rotation axis O.

[0019] Release piston 22 is movable in a disconnection direction (leftward in FIG. 1) and a transmission direction (rightward in FIG. 1). The disconnection direction is the direction in which release piston 22 moves when power transmission of clutch device 101 is disconnected. The transmission direction is the direction in which release piston 22 moves when power is transmitted in clutch device 101 in the clutch-off state. The transmission direction is the opposite direction to the disconnection direction.

[0020] The spring 23 is disposed between the release piston 22 and the cylinder 21. The spring 23 biases the release piston 22 in the axial direction toward the diaphragm spring 102. That is, the spring 23 biases the release piston 22 in the blocking direction. The air chamber 24 is defined by the cylinder 21 and the release piston 22. The spring 23 is disposed in this air chamber 24.

[0021] The push ring 25 is configured to press the diaphragm spring 102. In detail, the push ring 25 is cylindrical and presses the inner periphery of the diaphragm spring 102. The release bearing 26 is disposed between the release piston 22 and the push ring 25. An inner ring of the release bearing 26 abuts against the push ring 25, but does not abut against the release piston 22. Also, an outer ring of the release bearing 26 abuts against the release piston 22, but does not abut against the push ring 25.

[0022] The guide member 27 is disposed outside the cylinder 21. The guide member 27 is configured to move integrally with the release piston 22. In other words, the guide member 27 is movable in the axial direction.

[0023] When air is supplied to the air chamber 24, the release piston 22 and the push ring 25 move in the disconnecting direction so as to press the diaphragm spring 102, and the clutch device 101 enters a state in which the power transmission is interrupted (clutch-off state). When air is discharged from the air chamber 24 of the release device 2, the release piston 22 and the push ring 25 move in the transmission direction due to the biasing force of the diaphragm spring 102, the pressure of the push ring 25 on the diaphragm spring 102 is released, and the clutch device 101 enters a state in which the power is transmitted (clutch-on state).

[0024] <Control valve> The control valve 3 is configured to supply air to the air chamber 24 of the release device 2 and exhaust air from the air chamber 24. As shown in Fig. 2, the control valve 3 has a valve body 31, a valve element 32, and a biasing member 33. The control valve 3 also has a first chamber C1, a second chamber C2, and a third chamber C3.

[0025] The valve body 31 has a supply port P1 and a communication port P2. The supply port P1 is connected to an air supply source (not shown). The supply port P1 also communicates with the first chamber C1. Air is supplied from the air supply source to the first chamber C1 via the supply port P1.

[0026] The communication port P2 is connected to the air chamber 24 of the release device 2. The communication port P2 also communicates with the second chamber C2. The air chamber 24 of the release device 2 and the second chamber C2 communicate with each other via the communication port P2.

[0027] The valve element 32 is disposed within the valve body 31. The valve element 32 is disposed within the valve body 31 so as to be movable in an inward direction and a backward direction. The inward direction is the direction in which the valve element 32 enters the valve body 31, and is specifically the downward direction in FIG. 2. The backward direction is the direction in which the valve element 32 retreats from the valve body 31, and is specifically the upward direction in FIG. 2. The backward direction is the opposite direction to the inward direction. The inward direction is the same as the transmission direction, and the backward direction is the same as the blocking direction.

[0028] The valve body 32 has a first valve body 32a and a second valve body 32b. The first valve body 32a is disposed in the valve body 31. The first valve body 32a is disposed in the approaching direction relative to the second valve body 32b. The first valve body 32a is disposed so as to be movable in the axial direction. Note that the axial direction in the control valve 3 refers to the direction in which the valve body 32 moves. The outer peripheral surface of the first valve body 32a is disposed at a distance from the inner peripheral surface of the valve body 31. A first chamber C1 is formed between the first valve body 32a and the valve body 31 in the radial direction.

[0029] The first valve body 32a has a through hole 321 penetrating in the axial direction. The through hole 321 communicates with the internal space of the valve body 31 and the outside of the valve body 31. In detail, the through hole 321 communicates with the outside of the valve body 31 via the silencer 36. The inner circumferential surface of the through hole 321 of the first valve body 32a defines a third chamber C3. The third chamber C3 communicates with the outside of the valve body 31. The first valve body 32a is supported by a sleeve 37.

[0030] The second valve body 32b is disposed in the valve body 31. The second valve body 32b is disposed in the retracting direction relative to the first valve body 32a. One axial end (upper end in FIG. 2) of the second valve body 32b protrudes from the valve body 31. That is, the end of the second valve body 32b in the retracting direction protrudes from the valve body 31. This end of the second valve body 32b abuts against the operating mechanism 4. The second valve body 32b is movable in the axial direction within the valve body 31. When no force is applied from the operating mechanism 4 (neutral state), the second valve body 32b is disposed at a distance from the first valve body 32a in the axial direction.

[0031] The second valve body 32b moves in the advance direction by being pressed by the operation mechanism 4. When the second valve body 32b moves in the advance direction, the second valve body 32b comes into contact with the first valve body 32a. When the pressure by the operation mechanism 4 is released, the second valve body 32b moves in the retreat direction, and the second valve body 32b moves away from the first valve body 32a.

[0032] The biasing member 33 biases the valve body 32 in the retracting direction. The biasing member 33 has a first biasing member 33a and a second biasing member 33b.

[0033] The first biasing member 33a is configured to bias the first valve body 32a in the retracting direction. The first biasing member 33a biases the first valve body 32a, so that the first valve body 32a abuts against the abutment portion 311 of the valve main body 31. The first valve body 32a abuts against the abutment portion 311, so that the first chamber C1 is isolated from the second chamber C2. The first biasing member 33a is, for example, a coil spring. The first biasing member 33a is disposed in the first chamber C1. The first biasing member 33a is disposed so as to surround the first valve body 32a. The first biasing member 33a has a smaller spring constant than the diaphragm spring 102.

[0034] The second biasing member 33b is configured to bias the second valve body 32b in the retracting direction. That is, the second biasing member 33b biases the second valve body 32b toward a pressing portion 431 described later. The second biasing member 33b is, for example, a coil spring. The second biasing member 33b is disposed in the second chamber C2. The second biasing member 33b is disposed so as to surround the second valve body 32b. The second biasing member 33b has a smaller spring constant than the diaphragm spring 102.

[0035] <Operation mechanism> Fig. 3 is a front view showing the relationship between the control valve 3 and the operation mechanism 4, and Fig. 4 is a rear view thereof. As shown in Figs. 1, 3, and 4, the operation mechanism 4 is configured to operate the control valve 3. The operation mechanism 4 has an inner cable 41, an outer cable 42, a pressure link 43, an attachment link 44, and an auxiliary link 45 (an example of a holding mechanism).

[0036] The inner cable 41 is configured so that an operating force is applied to it by the driver's operation. An operating force is applied to the inner cable 41 when the driver operates the pedal. Specifically, when the driver operates the clutch pedal (not shown), an operating force is applied to the inner cable 41 so that it is pulled toward the right side in FIG. 3 (left side in FIG. 4). By applying tension to the inner cable 41 in this way, the inner cable 41 is put into a tensioned state.

[0037] When the driver releases the pedal operation and the operating force on the inner cable 41 is released, the inner cable 41 goes from a tensioned state to a relaxed state. That is, the tension acting on the inner cable 41 is released.

[0038] The inner cable 41 has a first tip portion 411. The first tip portion 411 is configured to move integrally with the release piston 22. In detail, the first tip portion 411 is attached to the guide member 27.

[0039] Moreover, the inner cable 41 has a first base end portion (not shown) that is connected to a member on the clutch pedal side.

[0040] When the release piston 22 moves in the transmission direction (to the right in FIG. 1), the first tip portion 411 also moves in the transmission direction. When the release piston 22 moves in the blocking direction (to the left in FIG. 1), the first tip portion 411 also moves in the blocking direction.

[0041] The outer cable 42 is cylindrical. The inner cable 41 extends inside the outer cable 42. As shown in Fig. 5, the outer cable 42 has a second tip portion 421. The second tip portion 421 is attached to the mounting link 44. In detail, the second tip portion 421 is attached to the mounting link 44 while facing the entry direction. The outer cable 42 also has a second base end portion (not shown). The second base end portion is fixed so as to be immovable.

[0042] The outer cable 42 has a flexible portion 422 and a rigid portion 423. The flexible portion 422 is a portion that is deformed by the force applied from the inner cable 41. The flexible portion 422 is formed, for example, of a composite material of a resin liner, a steel wire, and a resin coating, a composite material of a resin liner, a spirally wound steel wire, and a resin coating, or a resin tube. The flexible portion 422 extends in a curved state. The flexible portion 422 has a curved portion in an area not shown. The flexible portion 422 has a second base end It has.

[0043] The rigid portion 423 is a portion that does not deform even when a force is applied from the inner cable 41. The rigid portion 423 is made of, for example, a steel pipe, aluminum, or resin. The rigid portion 423 is attached to the tip of the flexible portion 422. The rigid portion 423 is also attached to the mounting link 44. The rigid portion 423 is formed in an L-shape. The rigid portion 423 has a second tip portion 421.

[0044] As shown in Figures 3 and 4, the pressing link 43 is swingably attached to the control valve 3 via a first joint portion 51. In detail, the pressing link 43 is swingably attached to the valve body 31 of the control valve 3. The pressing link 43 is swingable about the first joint portion 51. The first joint portion 51 is a joint portion between the pressing link 43 and the control valve 3. The first joint portion 51 is formed by a pin that penetrates the control valve 3 and the pressing link 43.

[0045] The pressing link 43 has a pressing portion 431. The pressing portion 431 is configured to press the valve body 32. The pressing portion 431 abuts against the valve body 32 of the control valve 3. The pressing portion 431 is in constant contact with the valve body 32.

[0046] The pressing portion 431 is movable in an entering direction and a retracting direction. When the pressing portion 431 moves in the entering direction, the valve body 32 moves in the entering direction by being pressed by the pressing portion 431. That is, when the pressing portion 431 moves in the entering direction, the valve body 32 moves in the entering direction so as to enter the valve body 31.

[0047] Furthermore, when the pressing portion 431 moves in the retracting direction, the valve body 32 moves in the retracting direction due to the biasing force of the biasing member 33. That is, when the pressing portion 431 moves in the retracting direction, the valve body 32 moves in the retracting direction so as to retract from within the valve body 31.

[0048] The pressing link 43 swings in the approaching direction so as to move the pressing portion 431 in the approaching direction. Note that in this embodiment, the pressing link 43 swinging in the approaching direction means that the pressing link 43 swings around the first joint portion 51 in the clockwise direction in FIG.

[0049] In addition, the pressing link 43 swings in the retracting direction so as to move the pressing portion 431 in the retracting direction. Note that in this embodiment, the pressing link 43 swinging in the retracting direction means that the pressing link 43 swings in the counterclockwise direction in FIG. 4 around the first joint portion 51.

[0050] As shown in FIG. 3, the mounting link 44 is swingably attached to the pressing link 43 via a second joint portion 52. In detail, the mounting link 44 is swingably attached to one end of the pressing link 43. The control valve 3 is attached to the other end of the pressing link 43 via a first joint portion 51. The mounting link 44 is swingable about the second joint portion 52. The second joint portion 52 is a joint portion between the mounting link 44 and the pressing link 43. The second joint portion 52 is formed by a pin that passes through the pressing link 43 and the mounting link 44.

[0051] The second tip portion 421 of the outer cable 42 is fixed to the mounting link 44. Therefore, the mounting link 44 moves integrally with the second tip portion 421 of the outer cable 42. That is, when the second tip portion 421 of the outer cable 42 moves in the approaching direction, the mounting link 44 also moves in the approaching direction together with the second tip portion 421. In addition, when the second tip portion 421 of the outer cable 42 moves in the retracting direction, the mounting link 44 also moves in the retracting direction together with the second tip portion 421.

[0052] 5, the mounting link 44 has a pair of extending portions 441 and a connecting portion 442. The pair of extending portions 441 are disposed at a distance from each other. A portion of the outer cable 42 is disposed between the pair of extending portions 441.

[0053] The connecting portion 442 connects the pair of extending portions 441. The connecting portion 442 connects the ends of the pair of extending portions 441 to each other. Each extending portion 441 has a first end portion 443 and a second end portion 444. The first end portion 443 is attached to the pressure link 43 via the second joint portion 52. The connecting portion 442 connects the second end portions 444 of the extending portions 441 to each other. The connecting portion 442 is integrally formed with the pair of extending portions 441 by a single member. The second tip portion 421 of the outer cable 42 is fixed to the connecting portion 442.

[0054] 3 to 5, the auxiliary link 45 is configured to maintain the posture of the mounting link 44. Specifically, the auxiliary link 45 maintains the posture of the mounting link 44 so that the second joint portion 52, the first tip portion 411, and the second tip portion 421 are aligned in a straight line.

[0055] The auxiliary link 45 is swingably attached to the control valve 3 via a third joint portion 53. Moreover, the auxiliary link 45 is swingably attached to the mounting link 44 via a fourth joint portion 54. In detail, the auxiliary link 45 is attached to one of a pair of extension portions 441. Moreover, the auxiliary link 45 is attached to the extension portion 441 between a first end portion 443 and a second end portion 444 of the extension portion 441.

[0056] The auxiliary link 45 extends parallel to the pressing link 43. Specifically, the straight line connecting the first joint portion 51 and the second joint portion 52 extends substantially parallel to the straight line connecting the third joint portion 53 and the fourth joint portion 54. Also, the straight line connecting the first joint portion 51 and the third joint portion 53 extends substantially parallel to the straight line connecting the second joint portion 52 and the fourth joint portion 54. That is, the pressing link 43, the mounting link 44, and the auxiliary link 45 configure a parallel link mechanism. Therefore, the posture of the mounting link 44 is maintained so that the second joint portion 52, the first tip portion 411, and the second tip portion 421 are aligned in a straight line.

[0057] As shown in FIG. 6, the auxiliary link 45 has a main body portion 451, a first bent portion 452, and a second bent portion 453. The main body portion 451 is a portion that extends substantially parallel to the pressure link 43. The first bent portion 452 is a portion that is bent from the main body portion 451 toward the control valve 3. The first bent portion 452 is attached to the control valve 3. In detail, the first bent portion 452 is inserted into a hole formed in the control valve 3. The first bent portion 452 and the hole in the control valve 3 form a third joint portion 53.

[0058] The second bent portion 453 is a portion bent from the main body portion 451 toward the opposite side to the first bent portion 452. The second bent portion 453 is a portion bent from the main body portion 451 toward the mounting link 44. The second bent portion 453 is shorter than the first bent portion 452. This second bent portion 453 is attached to the mounting link 44. In detail, the second bent portion 453 is inserted into a hole formed in the mounting link 44. The second bent portion 453 and the hole in the mounting link 44 form a fourth joint portion 54.

[0059] <Operation> Next, the operation of the release system 100 configured as described above will be described with reference to Figs. 7 to 9. In Figs. 7 to 9, reference lines L1 and L2 are lines for indicating the positional relationship of each member of the control valve 3 and the operation mechanism 4. First, as shown in Fig. 7, when the driver is not operating the clutch (for example, when the driver is not stepping on the clutch pedal), no operating force is applied to the inner cable 41, and the pressing portion 431 of the pressing link 43 does not press the second valve body 32b in the entering direction. Therefore, the control valve 3 is not operated at all and is in a neutral state.

[0060] The second valve body 32b is biased in the retreating direction by the second biasing member 33b. Therefore, the second chamber C2 is in communication with the third chamber C3. The first valve body 32a is biased in the direction toward the second valve body 32b by the first biasing member 33a and is in contact with the contact portion 311. Therefore, the first chamber C1 is isolated from the second chamber C2.

[0061] The air chamber 24 of the release device 2 is open to the outside via the second chamber C2 and the third chamber C3. That is, the air in the air chamber 24 of the release device 2 is discharged from the air chamber 24. Note that the second chamber C2 and the third chamber C3 are thus connected to each other, and the position of the valve body 32 when the air in the air chamber 24 is discharged is referred to as the exhaust position.

[0062] 8, when the driver performs a clutch-off operation (for example, when the driver depresses the clutch pedal), an operating force is applied to the inner cable 41, causing the inner cable 41 to become tense. As a result, the flexible portion 422 of the outer cable 42 tries to change from a curved state to a straight state, and since the second base end portion of the outer cable 42 is fixed so as not to move, the second tip portion 421 of the outer cable 42 presses the mounting link 44 in the entry direction.

[0063] As the mounting link 44 moves in the entry direction, the pressing link 43 swings in the entry direction, and the pressing portion 431 presses the second valve body 32b in the entry direction. The second valve body 32b moves in the entry direction and abuts against the first valve body 32a, moving the first valve body 32a in the entry direction. The first valve body 32a moves away from the abutment portion 311.

[0064] The second chamber C2 is isolated from the third chamber C3 and communicates with the first chamber C1. As a result, air is supplied from the first chamber C1 through the second chamber C2 to the air chamber 24 of the release device 2. The position of the valve body 32 when the first chamber C1 and the second chamber C2 are thus communicated and air is supplied to the air chamber 24 is referred to as the supply position.

[0065] 9, when the driver stops the clutch operation (for example, when the driver stops depressing the clutch pedal while it is depressed), the release piston 22 of the release device 2 moves in the disconnecting direction due to the air supplied to the air chamber 24. Then, the push ring 25 presses the inner periphery of the diaphragm spring 102, and the clutch device enters the clutch-off state.

[0066] The first tip portion 411 of the inner cable 41 moves in the shutoff direction (retraction direction) like the release piston 22, so the inner cable 41 becomes slightly loose. As a result, the pressing force by the second tip portion 421 of the outer cable 42 decreases, the mounting link 44 moves in the retraction direction, and the pressing portion 431 also moves in the retraction direction. The second valve body 32b and the first valve body 32a move in the retraction direction, and the first valve body 32a abuts against the abutment portion 311 while the first valve body 32a and the second valve body 32b remain in abutment with each other.

[0067] Therefore, the second chamber C2 is isolated from both the first chamber C1 and the third chamber C3. That is, the first chamber C1, the second chamber C2, and the third chamber C3 are not in communication with each other. As a result, the air pressure in the air chamber 24 is maintained, and the release piston 22 continues to press the diaphragm spring 102. Note that the position of the valve body 32 when the first chamber C1, the second chamber C2, and the third chamber C3 are not connected to each other and the air chamber 24 is closed is referred to as the closed position.

[0068] When the driver performs a clutch-on operation (for example, when the driver releases the clutch pedal), the inner cable 41 returns to its initial relaxed state, and the outer cable 42 also returns to its initial curved state, and the pressing force by the second tip portion 421 of the outer cable 42 is released. As a result, the mounting link 44 moves in the retracting direction, and the pressing portion 431 also moves in the retracting direction.

[0069] Therefore, the second valve body 32b moves in the retracting direction, and the second valve body 32b moves away from the first valve body 32a. As a result, the second chamber C2 communicates with the third chamber C3 and is isolated from the first chamber C1. That is, the valve body 32 moves to the exhaust position. As a result, the air in the air chamber 24 of the release device 2 is discharged from the air chamber 24, the release piston 22 moves in the transmission direction, and the clutch device 101 is in the clutch-on state. In addition, with the movement of the release piston 22 in the transmission direction, the first tip portion 411 of the inner cable 41 also moves in the transmission direction (advance direction). As a result, the control valve 3 and the operation mechanism 4 return to the state shown in FIG. 7. As described above, the valve body 32 is movable between three positions: the supply position, the exhaust position, and the closed position.

[0070] [Variations] Although the embodiments of the present invention have been described above, the present invention is not limited to these, and various modifications are possible without departing from the spirit of the present invention.

[0071] (a) In the above embodiment, the auxiliary link 45 is described as an example of a holding mechanism, but the configuration of the holding mechanism is not limited to this. For example, the posture of the mounting link 44 may be held by an elastic member or the like. In this case, the elastic member is an example of a holding mechanism.

[0072] (b) In the above embodiment, the mounting link 44 is configured by a pair of extending portions 441 and a connecting portion 442, but the configuration of the mounting link 44 is not limited to this. For example, the mounting link 44 may be configured by one extending portion 441 and a connecting portion 442.

[0073] (c) In the above embodiment, the auxiliary link 45 is configured by the main body portion 451, the first bent portion 452, and the second bent portion 453, but the configuration of the auxiliary link 45 is not limited to this. For example, the auxiliary link 45 may have only the main body portion 451. In this case, the auxiliary link 45 is attached to the control valve 3 or the mounting link 44 via a pin or the like. Also, the main body portion 451 can be formed in a plate shape rather than a rod shape. [Explanation of symbols]

[0074] 2: Release device 22: Release piston 24: Air chamber 3: Control valve 32: Valve body 34: 1st bending part 4: Operation mechanism 41: Inner cable 411: First tip 42: Outer cable 421:Second tip 43: Press link 431: Pressing part 44: Mounting link 441 :Extension part 442 :Connection part 443: First end 444 :Second end 45: Auxiliary link 51: First joint 52: Second joint part 53: Third joint 54: 4th joint 100: Release system 451: Main body 452: 1st bending part 453:Second bending part

Claims

1. a release device having a release piston and an air chamber; a control valve having a valve body and configured to control the supply of air to the air chamber and the exhaust of air from the air chamber; an operating mechanism configured to operate the control valve; The operation mechanism includes: an inner cable including a first tip portion configured to move integrally with the release piston, the inner cable being configured to receive an operating force through an operation by a rider; an outer cable having a second tip portion and through which the inner cable extends; a pressing link including a pressing portion configured to press the valve body and pivotably attached to the control valve via a first joint portion; an attachment link that is swingably attached to the pressing link via a second joint portion and to which the second tip portion is fixed; a holding mechanism for holding the posture of the mounting link; having Release system.

2. the holding mechanism is an auxiliary link that is swingably attached to the control valve via a third joint portion and to the mounting link via a fourth joint portion, The auxiliary link extends parallel to the pressure link.

2. The release system of claim 1.

3. The auxiliary link is A main body portion extending parallel to the pressing link; a first bent portion bent from the main body portion and attached to the control valve; a second bent portion bent in a direction opposite to the first bent portion and attached to the attachment link; 3. A release system according to claim 2.

4. The mounting link is A pair of extensions spaced apart from each other; A connecting portion that connects the pair of extending portions; having The second tip portion is fixed to the connecting portion.

2. The release system of claim 1.

5. the holding mechanism is an auxiliary link that is swingably attached to the control valve via a third joint portion and to the mounting link via a fourth joint portion, The auxiliary link extends parallel to the pressure link, Each of the extension portions is A first end attached to the pressure link; A second end portion connected to the connecting portion; having The auxiliary link is attached to the extension between the first end and the second end.

5. A release system according to claim 4.

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