JP2014055658A - Clutch release device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress wear of a piston and a cylinder by allowing the piston to smoothly operate in a clutch release device for hydraulically moving a release bearing unit.SOLUTION: A clutch release device comprises: a release bearing unit 2; a base member 10; a plurality of cylinders 11; and a plurality of pistons 12. The release bearing unit 2 moves along a rotating shaft of a clutch device and releases the press by a pressing member. The base member 10 has an oil pressure chamber 20 inside. Each of the plurality of cylinders 11 is separately arranged to the base member 10, and hydraulic oil is supplied to the cylinders from the oil pressure chamber 20. Each of the plurality of pistons 12 has a piston body 30 arranged in the cylinder 11 in a freely movable manner, and a rod 31 whose one end can abut against the piston body 30 and the other end projects from the cylinder 11 to be connected with the release bearing unit 2.

Description

  The present invention relates to a clutch release device, and more particularly to a clutch release device for releasing a clutch disk pressing force by a pressing member of the clutch device.

  BACKGROUND ART A vehicle clutch device is provided with a hydraulic clutch release device that is operated by a clutch pedal. The clutch release device includes a slave cylinder, a release fork, and a release bearing unit. The slave cylinder is driven by a hydraulic pressure generated by a master cylinder directly connected to the clutch pedal. By operating the slave cylinder, the release bearing unit is moved through the release fork. Then, when the release bearing unit presses the lever tip of the diaphragm spring of the clutch device, the clutch is released.

  Here, it is necessary to increase the torque transmission capacity of the clutch as the engine output increases. When the clutch torque transmission capacity increases, the release operation force of the clutch increases accordingly. For this reason, as shown in Patent Document 1, a release device is already provided in which a release bearing unit is directly driven by a drive mechanism including a cylinder and a piston without using a conventional release fork or the like. Yes.

JP 2011-226492 A

  As described above, when releasing the clutch, the release bearing unit presses the lever tip of the diaphragm spring. At this time, the release load may not be applied uniformly to the entire release bearing unit due to clutch cover manufacturing error, assembly error, or uneven lever tip height.

  As described above, when the load does not uniformly act on the entire release bearing unit, the release bearing unit is inclined. Then, the piston connected to the release bearing unit also tilts, and the piston partially hits against the inner wall of the cylinder. For this reason, the problem that the piston does not slide smoothly or the wear of the piston and the inner wall of the cylinder increases.

  SUMMARY OF THE INVENTION An object of the present invention is to smoothly operate a piston and suppress wear of the piston or cylinder in a clutch release device in which the piston is operated by hydraulic pressure and the release bearing unit is moved.

  A clutch release device according to a first aspect of the present invention is a device for releasing a clutch disk pressing force by a pressing member of a clutch device, and includes a release bearing unit, a base member, a plurality of cylinders, and a plurality of pistons. And a hydraulic pressure supply unit. The release bearing unit moves along the rotation shaft of the clutch device and releases the pressing by the pressing member. The base member has a hydraulic chamber inside. The plurality of cylinders are separately arranged on the base member, and hydraulic oil is supplied from the hydraulic chamber. Each of the plurality of pistons includes a piston main body that is movably disposed in the cylinder, and a rod that has one end capable of contacting the piston main body and the other end protruding from the cylinder and connected to the release bearing unit. . The hydraulic pressure supply unit is provided in the base member and supplies hydraulic oil for operating the plurality of pistons to the hydraulic chamber.

  In this apparatus, when hydraulic oil is supplied to a plurality of cylinders via a hydraulic chamber from a hydraulic pressure supply section provided on a base member, piston bodies provided in each cylinder slide, and further a rod is pressed to release. Activate the bearing unit. Thereby, the coupling of the clutch device is released.

  Here, the piston is composed of two members: a piston body that slides in the cylinder, and a rod that is connected to the release bearing unit. Therefore, even if the release bearing unit is tilted without the load being uniformly applied to the release bearing unit, the tilting of the piston body can be suppressed. For this reason, wear of the piston main body and the cylinder inner wall is suppressed.

  The clutch release device according to the second aspect of the present invention is the device according to the first aspect, wherein the rod is connected to the release bearing unit by a detachable pin.

  Here, the connection between the release bearing unit and the rod of the piston can be easily released by removing the pin. Therefore, it is easy to assemble the device or replace the release bearing.

  In the clutch release device according to the third aspect of the present invention, in the device of the first or second aspect, at least one of the end surfaces of the piston body and the rod that contact each other is a spherical surface.

  Here, as described above, the piston is composed of two members, the piston main body and the rod, and at least one of the contact surfaces of both is formed into a spherical surface. However, the influence on the piston body can be reduced, and the piston body can be smoothly slid in the cylinder.

  A clutch release device according to a fourth aspect of the present invention is the clutch release device according to any one of the first to third aspects, wherein the base member is disposed to face the first base plate and the annular first base plate; And an annular second base plate constituting a hydraulic chamber.

  Here, since the base member is composed of two plates, the base member can be formed with a simple configuration and at a low cost.

  The clutch release device according to the fifth aspect of the present invention is the device according to the fourth aspect, wherein the outer peripheral end and the inner peripheral end of the first and second base plates are welded over the entire circumference.

  Here, the two annular plates are sealed between the two plates by welding the outer peripheral end and the inner peripheral end of each other. Thereby, a hydraulic chamber can be formed easily.

  In the clutch release device according to the sixth aspect of the present invention, in the device of the fourth or fifth aspect, the second base plate has openings at a plurality of positions including a position where a plurality of cylinders are arranged. Each of the plurality of cylinders includes an attachment portion sandwiched between the first base plate and the second base plate, and a cylinder body that protrudes from the attachment portion through the opening of the second base plate to the clutch device side. ing.

  A clutch release device according to a seventh aspect of the present invention is the device according to the sixth aspect, wherein the hydraulic pressure supply portion is provided on the base member and a pipe for supplying hydraulic pressure from the outside, and the pipe is connected to operate from the pipe. A socket for introducing oil into the hydraulic chamber. The socket has an attachment portion sandwiched between the first base plate and the second base plate, and a socket body that protrudes from the attachment portion through the opening of the second base plate to the clutch device side. . The pipe is connected to the tip of the socket body.

  Here, the hydraulic supply port is constituted by a socket. The socket is provided such that its mounting portion is disposed in a hydraulic chamber between the first base plate and the second base plate, and the socket body projects from the mounting portion.

  For this reason, the hydraulic pressure supply port can be configured substantially parallel to the rotating shaft, and the size in the radial direction can be reduced.

  A clutch release device according to an eighth aspect of the present invention is the device according to any one of the first to seventh aspects, further comprising a biasing member that biases the release bearing unit in a direction away from the base member.

  With this urging member, the release bearing unit can be pressed against the clutch device. That is, a preload can be applied to the release mechanism of the clutch device. Therefore, a gap between the release bearing unit and the clutch device can be eliminated, and noise due to vibration can be suppressed.

  In the present invention as described above, in the clutch release device in which the piston is operated by hydraulic pressure and the release bearing unit is moved, the piston is smoothly operated to suppress wear of the piston and the cylinder.

The front view of the clutch release apparatus by 1st Embodiment of this invention. II-II sectional view taken on the line of FIG. III-III sectional view taken on the line of FIG. The enlarged view of the cylinder and piston part of FIG. The enlarged view of the socket part of FIG. The figure equivalent to FIG. 2 of 2nd Embodiment of this invention.

-First embodiment-
[overall structure]
1 to 3 show a clutch release device according to a first embodiment of the present invention. 1 is a front view of the apparatus, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a sectional view taken along the line III-III in FIG.

  Although not shown, the clutch device is disposed on the left side of the clutch release device 1 in FIGS. The clutch device mainly includes a clutch disk pressed against the flywheel, a pressure plate for pressing the clutch disk against the flywheel, and a diaphragm spring that applies a pressing force to the pressure plate.

  The clutch release device 1 includes a release bearing unit 2 and a hydraulic clutch release cylinder device 3. And the clutch release apparatus 1 cancels | releases the press to the pressure plate of a diaphragm spring by pushing the inner peripheral edge part of a diaphragm spring to an engine side.

[Release bearing unit 2]
The release bearing unit 2 includes a release plate 5 that comes into contact with an inner peripheral end of a diaphragm spring (not shown), a release bearing 6 attached to the release plate 5, and a connecting plate 7 fixed to the outer periphery of the release bearing 6. Have.

  The release plate 5 includes an annular pressing portion 5a and an inner ring support portion 5b extending along the axial direction from the inner peripheral portion of the pressing portion 5a. The side surface of the pressing portion 5a can abut on the inner peripheral end of the diaphragm spring. The inner ring support portion 5b supports the inner ring of the release bearing 6.

  The connection plate 7 includes a support part 7a, a bearing support part 7b, and a connection part 7c. The support portion 7a is annular and has an L-shaped cross section. The support portion 7a is disposed on the side of the release bearing 6 and supports a preload spring (described later). The connecting portion 7c is provided at equiangular intervals in the circumferential direction at three locations on the outer peripheral portion of the support portion 7b. The bearing support portion 7 b extends along the axial direction and supports the release bearing 6. The connecting portion 7c is formed to extend radially outward from the tip of the bearing support portion 7b, and has a connecting hole 7d penetrating in the axial direction.

[Clutch release cylinder device 3]
The clutch release cylinder device 3 includes a base member 10, three cylinders 11, pistons 12 provided in each of the three cylinders 11, a hydraulic pressure introduction unit (hydraulic supply unit) 13, and a hydraulic pressure discharge unit 14. It is equipped with.

<Base member 10>
The base member 10 includes a first base plate 15 and a second base plate 16 each formed in an annular shape, and three spacers 17 (see FIG. 3) disposed between the base plates 15 and 16. . Both base plates 15 and 16 are made of sheet metal, for example.

  The first base plate 15 is disposed on the side opposite to the clutch device (the right side in FIG. 2). The first base plate 15 has a flat disk shape, and three positioning holes 15a (see FIG. 3) are formed at predetermined intervals in the circumferential direction.

  The second base plate 16 is disposed so as to face the first base plate 15 in the axial direction. As described above, the second base plate 16 is formed in an annular shape. The inner peripheral edge 16a and the outer peripheral edge 16b of the second base plate 16 are bent toward the first base plate 15 over the entire circumference.

  In the second base plate 16, bonding grooves 16c and 16d are formed in the outer peripheral wall portion at the distal end portion of the inner peripheral edge portion 16a and the inner peripheral wall portion at the distal end portion of the outer peripheral edge portion 16b, respectively. The inner peripheral edge and the outer peripheral edge of the first base plate 15 are joined to the joining grooves 16c and 16d by laser welding, whereby the hydraulic chamber 20 is provided between the first base plate 15 and the second base plate 16. Is formed. Note that laser welding of the first base plate 15 and the second base plate 16 is performed by irradiating laser light from the opposite side to the clutch device.

  Further, as shown in FIGS. 2 and 3, the second base plate 16 has two socket openings 16e, three cylinder openings 16f, and positioning holes 16g. As shown in FIG. 1, of the two socket openings 16e, the opening formed in the hydraulic pressure discharge portion 14 is formed at a position such that the opening is disposed above when the apparatus is attached to the vehicle. Yes.

  As shown in FIG. 3, the spacer 17 is an annular member having a through hole 17a into which a device mounting bolt is inserted, and a stopper portion 17b formed on the outer peripheral portion and a positioning portion formed on the central portion. 17c. The stopper portion 17b is disposed so as to be sandwiched between the first base plate 15 and the second base plate 16, whereby the gap between the base plates 15 and 16 is set to a predetermined gap. The positioning portion 17c is formed so as to protrude from the stopper portion 17b on both sides, and a portion protruding to one side is fitted into the positioning hole 15a of the first base plate 15, and a portion protruding to the other side is the second base plate. 16 positioning holes 16g. Thereby, both base plates 15 and 16 are positioned in the circumferential direction.

  An annular groove for a seal member is formed on both surfaces of the stopper portion 17b of the spacer 17, and the seal member 22 is attached to the seal member groove.

<Cylinder>
All the three cylinders 11 have the same configuration, and are disposed in the cylinder openings 16 f of the second base plate 16, respectively.

  As shown in FIG. 4 in which a part of FIG. 2 is enlarged, the cylinder 11 includes a cylinder body 25, a mounting flange portion 26 formed to spread outward at the end of the cylinder body 25, a cap 27, and a dust seal. 29.

  An opening 25 a through which the piston 12 passes is formed at the tip of the cylinder body 25. The mounting flange portion 26 is disposed in the hydraulic chamber 20 and has the same thickness as the stopper portion 17 b of the spacer 17. An annular groove 26a is formed on the end face of the mounting flange portion 26 on the clutch device side, and a seal member 28 is disposed in the annular groove 26a. As a result, the hydraulic oil in the hydraulic chamber 20 does not leak from the opening 16 f of the second base plate 16. A hydraulic oil passage 26 b is formed on the opposite end face of the mounting flange portion 26. The hydraulic oil passage 26 b is formed by grooves of a predetermined width that are formed on the end face of the mounting flange portion 26 and are orthogonal to each other.

  An annular groove 25b is formed at the tip of the opening 25a of the cylinder body 25, and a dust seal 29 is disposed in the annular groove 25b. A cap 27 is attached to the tip of the cylinder body 25, and the dust seal 29 is held in the annular groove 25b by the cap 27. The cap 27 is formed with a hole 27 a having a diameter slightly larger than the opening 25 a of the cylinder body 25.

<Piston 12>
As shown in FIG. 4, the piston 12 is movably disposed in each of the plurality of cylinders 11, and includes a piston main body 30 and a rod 31.

  The piston body 30 is slidably disposed inside the cylinder 11. The piston main body 30 includes a first guide portion 30a and a second guide portion 30b formed at both ends in the axial direction, and a seal having a smaller diameter than both the guide portions 30a and 30b formed between the both guide portions 30a and 30b. And an attachment portion 30c. Each guide part 30a, 30b slidably contacts the inner wall of the cylinder 11 and functions as a movement guide for the piston body 30. A seal member 33 is attached to the seal attachment portion 30c to prevent the hydraulic oil inside the cylinder 11 from leaking to the rod 31 side.

  The rod 31 is disposed on the clutch device side (left side in FIG. 2 and the like) of the piston body 30. A part of the rod 31 on the piston main body 30 side is accommodated inside the cylinder 11, and the tip end side of the rod 31 passes through the opening 25 a of the cylinder main body 25 and protrudes outside the cylinder 11.

  Further, the end portion of the rod 31 on the piston body 30 side is formed with a portion 31a having a larger diameter than the other portions, and this end surface is formed into a spherical surface that swells toward the piston body 30 side. That is, a spherical seat 31 a is formed at one end of the rod 31, and the end surface of the spherical seat 31 a is in contact with the end surface of the first guide portion 30 a of the piston body 30.

  Further, a connecting portion 31b having a small diameter is formed at the tip of the other end of the rod 31 as compared with other portions. The connecting portion 31 b passes through a connecting hole 7 d formed in the connecting plate 7. The connecting portion 31b of the rod 31 is formed with a hole 31c penetrating in the radial direction, and a snap pin 34 is attached to the hole 31c. The tip of the piston 12 is connected to the connecting plate 7 by the snap pin 34.

<Hydraulic introduction part 13 and hydraulic discharge part 14>
The hydraulic pressure introduction unit 13 supplies hydraulic oil for operating the plurality of pistons 12 to each cylinder 11 via the hydraulic chamber 20. As shown in FIG. 3, the hydraulic pressure introduction unit 13 includes a hydraulic pressure supply pipe 36 and a socket 37. The pipe 36 is connected to a hydraulic pressure supply source (not shown), and its tip is connected to a socket 37.

  The socket 37 includes a socket body 38 to which the pipe 36 is attached and a flange portion 39, as shown in FIG.

  The socket body 38 is formed in a cylindrical shape, and the fitting hole 38a having the largest inner diameter, the sealing hole 38b having a smaller diameter than the attachment hole 38a, and the pipe fitting into which the tip of the pipe 38 is inserted in order from the clutch device side. And a combination hole 38c. A U-shaped clip 40 is inserted into the mounting hole 38 a from the outer periphery of the socket body 38, whereby the pipe 36 is fixed to the socket 37. In the sealing hole 38b, two sealing members 41 such as an O-ring and a back plate 42 are disposed between the bottom of the sealing hole 38b and the bulging portion 36a of the pipe 36, respectively. The back plate 42 is a member for preventing the seal member 41 from protruding from the gap.

  The flange portion 39 is disposed so as to be sandwiched between the first base plate 15 and the second base plate 16. An annular groove 39a for the seal member is formed on the surface of the flange portion 39 on the second base plate 16 side, and the seal member 43 is mounted in the seal member groove 39a. A hydraulic oil passage 39 b is formed on the surface of the flange portion 39 on the first base plate 15 side. The hydraulic oil supplied through the pipe 36 is introduced into the hydraulic chamber 20 through the hydraulic oil passage 39b.

  As is clear from FIG. 1, the hydraulic pressure discharge unit 14 is disposed so as to be positioned above in a state of being attached to the vehicle. The hydraulic pressure discharge unit 14 has the same configuration as the hydraulic pressure introduction unit 13 and will not be described in detail. In the hydraulic discharge part 14, a spacer 45 (see FIG. 1) is disposed in a region above the pipe 47 of the hydraulic chamber 20. The spacer 45 can prevent air from accumulating in a region above the pipe 47 of the hydraulic pressure discharge unit 14 in the hydraulic chamber 20.

  An air bleeding bleeder 49 is provided at the tip of the pipe 47 connected to the hydraulic pressure discharge unit 14.

[Spring for preload]
As shown in FIG. 2, a preload spring 46 is provided between the support portion 7 a of the connection plate 7 and the second base plate 16 in the axial direction. The preload spring 46 has the largest coil diameter on the second base plate 16 side, and the coil diameter becomes smaller toward the connecting plate 7 side. The release bearing unit 2 is always biased toward the clutch device by the preload spring 46. For this reason, the release plate 5 of the release bearing unit 2 is always in contact with the lever tip of the diaphragm spring of the clutch device.

[Operation]
In a state where hydraulic oil is not supplied to the clutch release device 1, the release bearing unit 2 is biased toward the clutch device by the preload spring 46. For this reason, the release plate 5 of the release bearing unit 2 is in contact with the inner peripheral end portion of the diaphragm spring of the clutch device. However, the urging force of the preload spring 46 is not so large as to release the pressing force of the diaphragm spring.

  When the clutch device is released, hydraulic oil is supplied to the socket 37 through the pipe 36 of the hydraulic pressure introduction unit 13. Since the hydraulic oil passage 39b is formed at the bottom of the socket 37, the hydraulic oil is supplied into the hydraulic chamber 20 through the oil passage 39b. The hydraulic oil supplied to the hydraulic chamber 20 is supplied to each cylinder 11. Specifically, the hydraulic oil supplied into the hydraulic chamber 20 is supplied to the inside of the cylinder 11 via a hydraulic oil passage 26 b formed on the end face of the mounting flange portion 26 of the cylinder 11. Thereby, the piston main body 30 moves to the clutch device side. Then, the piston body 30 pushes the spherical seat 31a of the rod 31, so that the rod 31 protrudes to the clutch device side. Due to the protrusion of the rod 31, the clutch release bearing unit 2 moves to the clutch device side and presses the inner peripheral end of a diaphragm spring (not shown). For this reason, the pressing force of the diaphragm spring is released, and the clutch is released.

  Note that air may be mixed in the hydraulic path of the clutch release device 3 in the initial stage of assembly or the like. In this case, the bleeder 49 connected to the end of the pipe 47 is loosened, and the hydraulic pressure introduction unit 13 is pressurized. Thereby, the air mixed in the hydraulic path of the apparatus can be removed together with the hydraulic oil. At this time, in the hydraulic chamber 20, there is no space above the pipe 47 of the hydraulic discharge portion 14 due to the presence of the spacer 45, so that air does not remain in the hydraulic chamber 20.

[Feature]
(1) The piston 12 is divided into a piston body 30 and a rod 31. For this reason, even when the release bearing unit 2 is tilted, the tilted force does not act directly on the piston body 30. Therefore, the piston main body 30 can smoothly slide in the cylinder 11, and wear of the piston main body 30 and the inner wall of the cylinder 11 can be suppressed.

  (2) Since the end surface of the piston main body 30 is in contact with the spherical seat 31a of the rod 31, the influence on the piston main body 30 can be further reduced even when the release bearing unit 2 is tilted.

  (3) Since the rod 31 and the connection plate 7 are connected by the snap pin 34, the rod 31 and the connection plate 7 can be easily attached and detached. Therefore, the assembling work becomes easy, and when the release bearing breaks down, etc., only the bearing can be easily replaced.

  (4) Since the hydraulic pressure introduction part 13 and the hydraulic pressure discharge part 14 are sealed by the two pairs of seal members 41 and the back plate 42, it is possible to reliably suppress the hydraulic oil from leaking from these parts.

  (5) At the joint portion between the first base plate 15 and the second base plate 16, the inner peripheral edge portion 16a and the outer peripheral edge portion 16b of the second base plate 16 are formed in a straight shape, and grooves 16c and 16d are formed inside these. The end portions of the inner and outer circumferences of the first base plate 15 are fitted into these grooves 16c and 16d and welded. For this reason, the pressure receiving area of the second base plate 16 constituting the hydraulic chamber 20 can be reduced, and deformation of the second base plate 16 due to the hydraulic pressure can be suppressed.

-Second Embodiment-
FIG. 6 shows a second embodiment of the present invention. This second embodiment differs from the first embodiment only in the configuration of the piston, and the other configurations are the same.

  The piston 50 includes a piston main body 51 and a collar 52.

  The piston body 51 is slidably disposed inside the cylinder 11. The piston main body 51 includes a first guide portion 51a and a second guide portion 51b, a seal mounting portion 51c formed between the two guide portions 51a and 51b, and an axial direction from the first guide portion 51a to the clutch device side. And a rod portion 51d extending in the direction. Each of the guide portions 51 a and 51 b slidably contacts the inner wall of the cylinder 11 and functions as a movement guide for the piston main body 51. A seal member 33 is attached to the seal attachment portion 51c to prevent the hydraulic oil inside the cylinder 11 from leaking to the collar 52 side. A hole 51e penetrating in the radial direction is formed at the tip of the rod portion 51d.

  The collar 52 is a cylindrical member, and one end side is accommodated in the cylinder 11 and is in contact with the side surface of the first guide portion 51 a of the piston main body 51. Further, the other end side of the collar 52 protrudes to the outside of the cylinder 11. At the other end of the collar 52, a collar part 52 a having a larger diameter than the other part is formed, and this collar part 52 a supports the connecting plate 7.

  Further, a connecting portion 52b having a smaller diameter than that of the other portion is formed at the tip of the collar 52 on the other end side. The connecting portion 52 b passes through a connecting hole 7 d formed in the connecting plate 7. And the hole which penetrates to radial direction is formed in the connection part 52b. This hole is formed at the same position as the hole 51e of the piston main body 51, and a snap pin 34 is attached to these holes. The tip of the piston 50 is connected to the connecting plate 7 by the snap pin 34.

  Also in the second embodiment, the same functions and effects as those of the first embodiment are obtained except for the functions and effects of the spherical seat in the first embodiment.

[Other Embodiments]
The present invention is not limited to the above-described embodiments, and various changes or modifications can be made without departing from the scope of the present invention.

  (A) In the above embodiment, the base member is constituted by two sheet metal plates, but may be constituted by, for example, resin. Also, the cylinder is not particularly limited, such as formation by press working or resin molding.

  (B) Although the two plates constituting the base member are fixed by welding, the sealing member may be fixed by a fixing tool such as a bolt or a method such as caulking.

  (C) The number of cylinders and pistons is not limited to the above embodiment.

  (D) In the first embodiment, the spherical seat is provided on the end surface of the rod. However, the spherical seat may be provided on the piston body side. Moreover, you may provide a spherical seat in both a rod and a piston main body.

1 Clutch release device 2 Release bearing unit 3 Clutch release cylinder device 10 Base member 11 Cylinder 12, 50 Piston 15 First base plate 16 Second base plate 20 Hydraulic chamber 30, 51 Piston body 31, 52 Rod 31a Spherical seat 34 Snap pin 36, 47 Pipe 37 Socket 46 Preload spring

Claims (8)

A clutch release device for releasing a clutch disk pressing force by a pressing member of the clutch device,
A release bearing unit for moving along the rotation axis of the clutch device and releasing the pressing by the pressing member;
A base member having a hydraulic chamber therein;
A plurality of cylinders separately disposed on the base member and supplied with hydraulic oil from the hydraulic chamber;
A plurality of pistons each having a piston body movably disposed on the cylinder; and a rod having one end abutting the piston body and the other end protruding from the cylinder and connected to the release bearing unit; ,
A hydraulic pressure supply section that is provided in the base member and supplies hydraulic oil for operating the plurality of pistons to the hydraulic chamber;
Clutch release device with   The clutch release device according to claim 1, wherein the rod is connected to the release bearing unit by a detachable pin.   The clutch release device according to claim 1 or 2, wherein at least one of the end surfaces of the piston main body and the rod that are in contact with each other is a spherical surface. The base member includes an annular first base plate, and an annular second base plate that is disposed to face the first base plate and forms the hydraulic chamber between the first base plate and the first base plate. Item 4. The clutch release cylinder device according to any one of Items 1 to 3.   The clutch release cylinder device according to claim 4, wherein the first and second base plates are sealed at the outer peripheral end and the inner peripheral end over the entire circumference. The second base plate has openings at a plurality of positions including a position where the plurality of cylinders are arranged,
Each of the plurality of cylinders includes a mounting portion sandwiched between the first base plate and the second base plate, and a cylinder body protruding from the mounting portion through the opening of the second base plate to the clutch device side. And having
The clutch release cylinder device according to claim 4 or 5. The hydraulic pressure supply unit includes a pipe for supplying hydraulic pressure from the outside, and a socket provided on the base member and connected to the pipe to introduce hydraulic oil from the pipe into the hydraulic chamber,
The socket has an attachment portion sandwiched between the first base plate and the second base plate, and a socket body that protrudes from the attachment portion through the opening of the second base plate to the clutch device side. And
The pipe is connected to the tip of the socket body,
The hydraulic clutch release cylinder device according to claim 6.   The clutch release cylinder device according to any one of claims 1 to 7, further comprising a biasing member that biases the release bearing unit in a direction away from the base member.

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