JP2001050300A - Clutch release device and clutch using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a structure and improve controllability by providing an electric motor and a motion direction converting mechanism for converting rotation of the electric motor into axial motion and releasing a clutch by axial force around an input shaft in a concentric circular shape. SOLUTION: A clutch release device 6 is mainly constituted of a motor 31 and a motion direction converting mechanism 32. The motion direction converting mechanism 32 converts rotation of the motor 31 into axial motion and releases pressing load of a clutch cover assembly by the axial force. The motor 31 is constituted of a motor case 38, a stator 35 fixed to the motor case 38 and a rotatable rotor 36 on the inside of the stator 35. Both of the stator 35 and the rotor 36 are annular and concentric. Because the clutch release device 6 is constituted by only a combination of the motor 31 and the motion direction converting mechanism 32, the number of parts items is reduced, the structure is simplified and space as whole is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a clutch release device and a clutch.

[0002]

2. Description of the Related Art A clutch is a device for interrupting torque between an engine flywheel and an input shaft of a transmission. The clutch mainly includes a clutch disk assembly, a clutch cover assembly, a clutch release device, and the like. It is composed of A clutch disc assembly is a device for transmitting torque from a flywheel to an input shaft. The clutch disk assembly includes a clutch disk disposed near a friction surface of the flywheel,
The hub includes a hub that is spline-engaged with the input shaft, and a damper mechanism that elastically connects the clutch disc and the hub in the rotational direction.

[0003] A clutch cover assembly is a device for pressing a clutch disc against a friction surface of a flywheel. The clutch cover assembly includes a clutch cover fixed to the flywheel, a pressure plate disposed between the clutch cover and the friction facing, and an elasticity supported by the clutch cover to bias the pressure plate toward the flywheel. And a member. As the elastic member, for example, a disk-shaped diaphragm spring is used. The release device is a device for releasing the urging of the pressure plate by the diaphragm spring, for example, by acting on the diaphragm spring of the clutch cover assembly. The clutch release device includes, for example, a release bearing capable of abutting on the inner peripheral end of the diaphragm spring, and a hydraulic drive device for moving the release bearing in the axial direction. The hydraulic drive device includes a slave cylinder disposed in a cover of a clutch, a master cylinder connected to the slave cylinder outside the cover, and a mechanism for operating the master cylinder by operating a clutch pedal. .

[0004]

In the conventional clutch release device, as the size of the clutch increases, it becomes difficult to achieve a balance between the release load and the release amount within a practical range. For this reason, an auxiliary mechanism such as a release booster is employed, but the structure becomes complicated such as the necessity of air pressure, and the controllability in the clutch release operation is not good.

An object of the present invention is to simplify the structure of a clutch release device and improve controllability.

[0006]

A clutch release device according to a first aspect of the present invention is a device for releasing a clutch in a clutch for connecting and disconnecting a flywheel and an input shaft extending from a front wall of a transmission. The clutch release device includes an electric motor and a movement direction conversion mechanism that converts rotation of the electric motor into axial movement and releases the clutch by an axial force, concentrically around the input shaft.

In the clutch release device according to the first aspect, the clutch release device including the motor and the movement direction conversion mechanism is disposed around the input shaft.
The torque generated by the motor is used directly to release the clutch by the direction-of-motion conversion mechanism. Such a structure reduces the number of parts and simplifies the structure.

[0008] In the clutch release device according to the second aspect, in the first aspect, the motor has a rotor. The movement direction conversion mechanism has a cylindrical shaft and a moving member. The cylindrical shaft is fixed to the front wall and is disposed around the shaft. The moving member is disposed between the rotor and the cylindrical shaft, and is engaged with both so that the rotor moves axially along the cylindrical shaft when the rotor rotates.

In the clutch release device according to the second aspect, when the motor rotates, the moving member moves in the axial direction by the cylindrical shaft. In the clutch release device described in claim 3, in claim 2, the movement direction conversion mechanism further includes a bearing arranged on the clutch side of the moving member. In the clutch release device described in claim 4, in claim 2 or 3, the movement direction conversion mechanism further includes an urging member that applies an urging force to the moving member. The urging member urges the moving member in a direction in which the moving member moves at the time of clutch release.

In the clutch release device according to the fourth aspect, the urging member can reduce the torque of the motor required to move the moving member during the clutch release. In the clutch release device described in claim 5, in claim 4, the load of the biasing member is locked in the movement direction conversion mechanism and does not affect the pressing load of the clutch. It is not blocked in the mechanism and does not affect the load of the biasing member.

In the clutch release device according to the fifth aspect, the load by the urging member does not act on the clutch side, and the load from the clutch side does not act on the urging member.
Each load is locked at a portion of the screw mechanism inside the movement direction conversion mechanism. In the clutch release device according to the sixth aspect, in any one of the first to fifth aspects, the outer periphery of the clutch is covered by a cover extending from the front wall, and the clutch release device is disposed inside the cover.

According to a seventh aspect of the present invention, in the clutch release device according to any one of the first to sixth aspects, the clutch release device is detachable from the front wall as one assembly. The clutch according to claim 8 is for intermittently connecting the input shaft extending from the front wall of the transmission to the flywheel. The clutch includes a clutch disk assembly, a clutch cover assembly, and a clutch release device according to claim 4. The clutch disc assembly has a clutch disc disposed in close proximity to a friction surface of a flywheel and is capable of outputting torque to an input shaft. The clutch cover assembly is for biasing the clutch disk assembly to the flywheel. The clutch cover assembly includes a clutch cover fixed to the flywheel, a pressure plate arranged in the clutch cover and arranged close to the clutch disc assembly, and a pressure plate supported by the clutch cover on the flywheel side. It has a diaphragm spring for biasing and a wear following mechanism for keeping the attitude of the diaphragm spring constant against wear of the clutch disk. The clutch release device is a device for releasing the urging of the diaphragm spring to the pressure plate by acting on the diaphragm spring.

[0013] In the clutch according to the eighth aspect, the attitude of the diaphragm spring is unlikely to change due to the wear of the clutch disk by the wear following mechanism. Therefore, the release load characteristic obtained by the combination of the diaphragm spring and the biasing member is unlikely to change over a long period of time.

[0014]

FIG. 1 shows a power transmission system 1 for a vehicle to which an embodiment of the present invention is applied. The power transmission system 1 mainly includes an engine 2, a transmission 3, and a clutch 4 disposed therebetween.
In the clutch 4, a clutch cover assembly 5 for generating a pressing force for connecting the clutch and a clutch release device 6 for releasing the pressing force are shown. Motor 31 constituting clutch release device 6
(FIG. 2) is controlled by the control system 7. The control system 7 includes a drive circuit 8 and an ECU 9. The ECU 9 receives a signal from, for example, an angle sensor or a displacement sensor provided on the clutch pedal 10, and controls a drive circuit according to the signal to move an electric cylinder (described later). As another method, the ECU 9 has a ROM or a RAM.
The electric cylinder can be moved by controlling the drive circuit according to the program stored in the motor controller 11.

Next, the structure of the clutch 4 will be described with reference to FIG. The clutch 4 receives the torque from the crankshaft 15 and the flywheel 16 of the engine 2,
This is a device for transmitting or blocking to the input shaft 19 of the transmission 3. The clutch 4 includes the above-described clutch cover assembly 5, a clutch release device 6, and a clutch disk assembly 13. Note that FIG.
In FIG. 2, OO is a rotation shaft of the clutch 4, an engine (not shown) is arranged on the left side of FIG. 2, and a transmission (not shown) is arranged on the right side of FIG.

The clutch disk assembly 13 is arranged close to the flywheel 16. The clutch disc assembly 13 has a clutch disc 81 on the outer periphery and a hub 82 on the inner periphery. A damper mechanism 83 including a plate member, a spring, and the like is provided between the clutch disk 81 and the hub 82. A spline that engages with the input shaft 19 is formed on the inner periphery of the hub 82.

A front wall 17 is provided on the transmission side (the right side in FIG. 2) of the clutch 4 in the axial direction. Front wall 1
A cover 18 extends from 7 toward the engine in the axial direction.
The cover 18 covers the outer peripheral side of the entire clutch 4. A central hole 85 is provided in the center of the front wall 17 so as to penetrate in the axial direction. The input shaft 19 protrudes from the central hole 85 into the clutch 4 toward the engine in the axial direction. The input shaft 19 is rotatably supported on the front wall 17 by a bearing 20 mounted in the center hole 85. The tip of the input shaft 19 is rotatably supported by the flywheel 16 via a bearing 21.

The clutch cover assembly 5 is a device for pressing the clutch disc 81 of the clutch disc assembly 13 against the flywheel 16. The clutch cover assembly 5 mainly includes a clutch cover 23, a diaphragm spring 24, a pressure plate 25, and a wear following mechanism 2.
6. The clutch cover 23 is an annular sheet metal member fixed to the flywheel 16. The pressure plate 25 is arranged on the inner peripheral side of the clutch cover 23, and is arranged near the clutch disk of the clutch disk assembly 13. Diaphragm spring 24
Is a disk-shaped member, and the outer peripheral portion is disposed between the clutch cover 23 and the pressure plate 25. The diaphragm spring 24 is connected to the pressure plate 2
5 includes an annular elastic portion 86 for applying a biasing force to the lever 5 and a plurality of lever portions 87 extending from the annular elastic portion 86 to the inner peripheral side. An inner peripheral end of the annular elastic portion 86 is supported by the clutch cover 23, and an outer peripheral end thereof applies a pressing force to the pressure plate 25. With the structure described above, when the tip of the lever portion 87 is pushed toward the engine, the annular elastic portion 86 is pressed.
Moves in a direction away from the fulcrum ring 28.

The wear following mechanism 26 is a mechanism for keeping the posture of the diaphragm spring 24 at the time of clutch engagement constant even when the wear of the clutch disk 81 of the clutch disk assembly 13 has advanced. The wear following mechanism 26 includes the pressure plate 25 and the diaphragm spring 2.
4 are arranged. Specifically, the wear following mechanism 26 includes a fulcrum ring 28, a biasing mechanism 29, and a movement restricting mechanism 100. The fulcrum ring 28 is an annular member disposed between the pressure plate 25 and the diaphragm spring 24, and is in contact with the outer peripheral end of the diaphragm spring 24 from the engine side in the axial direction. The urging mechanism 29 is disposed between the pressure plate 25 and the fulcrum ring 28, and constantly urges the fulcrum ring 28 away from the pressure plate 25 (axial transmission side) by a spring 89 and a wedge mechanism 90. The movement restricting mechanism 100 detects the amount of wear on the clutch disc 81 while restricting the movement of the fulcrum ring 28 toward the transmission in the axial direction, and detects the amount of wear. This is a mechanism that allows the user to move. The movement restricting mechanism 100 includes a bolt 101 and a spring collar 102 as shown in FIG. Bolt 10
Numeral 1 is fixed to a pressure plate, and its head and the like are located outside the cover through holes formed in the clutch cover 23. The spring collar 102 is a cylindrical member having a slit formed in the axial direction.
And are frictionally engaged. The spring collar 102 has a flange that abuts against the clutch cover 23 from outside. Also, spring color 1
The tip of 02 is in contact with the fulcrum ring 28.

The axial position of the fulcrum ring 28, that is, the axial position of the outer peripheral end of the diaphragm spring 24, is reliably returned to the predetermined position after the clutch disk 81 is worn by the wear following mechanism 26. That is, the attitude of the diaphragm spring 24 does not change despite the wear of the clutch disc 81. As a result, the pressing load acting on the pressure plate 25 from the diaphragm spring 24 and the release load characteristics of the diaphragm spring 24 do not change.

Next, the clutch release device 6 will be described. The clutch release device 6 includes the clutch cover assembly 5
, The pressing load from the diaphragm spring 24 to the pressure plate 25 is released (that is, the clutch disc assembly 13 is connected to the flywheel 16
To separate from the The clutch release device 6 as a whole constitutes one sub-assembly, and is detachably attached to the front wall 17 of the transmission. The clutch release device 6 is provided around the input shaft 19 and concentrically.

The clutch release device 6 mainly comprises a motor 31 and a movement direction conversion mechanism 32.
The motor 31 is rotated by a drive signal from the drive circuit 8 shown in FIG. The movement direction converting mechanism 32 is a mechanism for converting the rotation of the motor 31 into an axial movement and releasing the pressing load of the clutch cover assembly 5 by the axial force. The movement direction conversion mechanism 32 mainly includes
A block holder 53, a bearing moving member 54,
Release bearing 55 and a plurality of cone springs 5
6 and a thrust bearing 57.

Hereinafter, the structure of the clutch release device 6 will be described in detail. The motor 31 is the input shaft 1
9 and are arranged concentrically. As the motor 31, a motor called a step motor or an SR (switched reluctance) motor can be used. The motor 31 mainly includes a motor case 38, a stator 35 fixed to the motor case 38, and a rotor 36 rotatable on the inner peripheral side of the stator 35.

The motor case 38 includes a cylindrical portion 39,
The cylindrical portion 39 has a first flange 40 extending from the axial transmission end to the outer peripheral side, and a cylindrical portion 39 has a second flange 41 extending from the axial engine end to the inner peripheral side. The first flange 40 is a flange 61 described later.
At the same time, it is fixed to the front wall 17 by bolts 99.
A rotation position sensor and a connector 42 are provided outside the cylindrical portion 39. The rotation position sensor and the connector 42 are connected to the drive circuit 8.

The stator 35 and the rotor 36 are both annular and concentric, and are accommodated on the inner peripheral side of the cylindrical portion 39 and on the axial transmission side of the second flange 41. The stator 35 has an annular portion 37 and a plurality of salient pole teeth 44 formed on an inner peripheral side thereof. The salient pole teeth 44 of the stator 35 have phase windings, and are wound in opposite directions so that the facing magnetic poles are the opposite poles of N and S. Rotor 36
Is an annular portion 47 and a plurality of salient pole teeth 4 formed on the outer peripheral side thereof.
Eight. No phase winding is wound on the salient pole teeth 48 of the rotor 36. The salient pole teeth 48 of the rotor 36 are two more than the salient pole teeth of the stator 35. More specifically, in this embodiment shown in FIG. 5, in order to make two magnetic poles face each other,
A five-phase, 10-8 tooth pole is configured, and unequally spaced slots are employed.

The annular portion 37 of the stator 35 has a cylindrical portion 39.
The spline groove 49 is formed on the inner peripheral side of the annular portion 47 of the rotor 36. Also,
An annular oilless metal 5 is provided between an outer peripheral portion of the annular portion 47 on the transmission side in the axial direction and a flange 61 described later.
1 is arranged. Furthermore, an annular oilless metal 52 is provided between the outer peripheral surface of the annular portion 47 on the engine side in the axial direction and the inner peripheral end of the second flange 41. As described above, the rotor 36 is positioned in the radial direction and the axial direction by the block holder 53 and the motor case 38.

The block holder 53 comprises a disk-shaped flange 61 and a cylindrical shaft 62 extending from the inner peripheral end of the flange 61 to the engine side in the axial direction. The outer peripheral portion of the flange 61 is fixed to the front wall 17 by the plurality of bolts 99 described above. An annular portion 61a extends from the inner peripheral portion of the flange 61 toward the transmission in the axial direction. The annular portion 61a is inserted into the center hole 85 of the front wall 17. Thus, the block holder 53 is positioned in the radial direction.

The cylindrical shaft 62 is disposed around the input shaft 19, and its axial engine end is connected to the hub 82 and the clutch cover assembly 5 of the clutch disc assembly 13.
Inner peripheral end of the diaphragm spring 24 (the lever portion 87).
End). Next, the outer peripheral surface of the cylindrical shaft 62 will be described. In the outer peripheral surface of the cylindrical shaft 62, the axial transmission side has a smooth outer peripheral surface 62a, and the axial engine side has a thread groove 63 formed therein. The thread groove 63 has a trapezoidal cross section.

The moving member 54 is an annular member disposed on the outer periphery of the cylindrical shaft 62 and on the inner periphery of the rotor 36.
The moving member 54 has an annular main body 64 and a protrusion 65 extending from the inner peripheral side of the annular main body 64 to the engine side in the axial direction. Spline teeth 66 that engage with the spline grooves 49 of the rotor 36 are formed on the outer peripheral surface of the annular main body 64. Accordingly, the moving member 54 is configured to rotate integrally with the rotor 36 and to be relatively movable in the axial direction with respect to the rotor 36. A thread groove 67 is formed on the inner peripheral surface of the annular main body 64 and the protruding portion 65. The thread groove 67 has a trapezoidal cross section, and is engaged with a thread groove 63 formed on the outer peripheral surface of the cylindrical shaft 62. This engagement allows the moving member 54 to move in the axial direction at the same time as rotating with respect to the cylindrical shaft 62.
In this way, a structure in which relative movement in the axial direction occurs when relative rotation occurs between the moving member 54 and the cylindrical shaft 62 is referred to as a screw engagement portion 68. As another structure, a screw groove is used for engagement between the rotor 36 and the moving member 54, and
Moving member 54 and cylindrical shaft 6 of block holder 53
Spline teeth can also be used for engagement with the two.

As shown in FIG. 3, an annular space A is provided between the annular main body 64 of the moving member 54 and the inner peripheral portion of the flange 61.
Are formed. The inner peripheral surface of the space A is formed by the smooth outer peripheral surface 62 a of the cylindrical shaft 62, and the outer peripheral surface is formed by the inner peripheral surface of the rotor 36. In this space A, a plurality of cone springs 56 and thrust bearings 57 are arranged. As shown in FIG. 4, the plurality of cone springs 56 are, more specifically, a first cone spring 71 and a second cone spring
It comprises a cone spring 72, a third cone spring 73, and a fourth cone spring 74. A first plate 76 is disposed between the first cone spring 71 and the second cone spring 72. Between the second cone spring 72 and the third cone spring 73, the second
A plate 77 is provided. A third plate 78 is disposed between the third cone spring 73 and the fourth cone spring 74. These plates 76, 77, 7
Numeral 8 is for preventing edges of the cone springs from contacting each other. Multiple cone springs 5
A thrust bearing 57 for receiving an axial load from the cone spring 56 is disposed between the inner peripheral portion 6 and the inner peripheral portion of the flange 61. As a result of the above arrangement, the first cone spring 71 applies an urging force to the thrust bearing 57 toward the axial transmission, and the fourth cone spring 74 applies an urging force to the moving member 54 toward the engine in the axial direction. ing.

A release bearing 55 is arranged between the inner peripheral end of the diaphragm spring 24 and the moving member 54 in the axial direction. The release bearing 55 is for transmitting the axial load from the moving member 54 to the diaphragm spring 24 without transmitting the rotation of the diaphragm spring 24 to the moving member 54 side. The release bearing 55 includes the inner race 92 and the outer race 9.
3 and a plurality of rolling elements 94. The inner race 92 is in contact with the distal end of the lever portion 87 of the diaphragm spring 24 on the axial transmission side. The outer race 93 is fixed to the moving member 54 via a case 97. Specifically, the case 97 includes the outer race 9.
3, a first cylindrical portion 97a fixed to the outer peripheral side, an annular portion 97b abutting on the axial engine side surface of the annular main body 64,
The outer peripheral surface of the protruding portion 65 has a second cylindrical portion 97c into which the press-fitting is performed.

Next, the operation will be described. In the clutch connection state shown in FIG. 2, the moving member 54 and the release bearing 55 in the clutch release device 6 are located on the transmission side in the axial direction. As a result, the annular elastic portion 86 of the diaphragm spring 24 is connected to the pressure plate 25 (more specifically, the fulcrum ring 28).
To the engine in the axial direction. As a result, the clutch disc 81 of the clutch disc assembly 13 is attached to the flywheel 16 and the pressure plate 2.
5 between. Therefore, the flywheel 16
Is transmitted to the clutch disk assembly 13 and further output to the input shaft 19.

Here, for example, the driver operates the clutch pedal 10
When the pedal is depressed, a signal detected by the angle sensor or the displacement sensor is sent to the ECU 9. The ECU 9 supplies a control signal to the drive circuit 8, and the drive circuit 8 further supplies a drive signal to the motor 31. As a result, the rotor 36 rotates in one direction, and accordingly, the moving member 54 also rotates integrally. During this rotation, the moving member 54 moves along the cylindrical shaft 62 toward the engine in the axial direction. Therefore, the release bearing 55 is pushed by the moving member 54 and moves toward the engine in the axial direction, and pushes the inner peripheral ends of the plurality of lever portions 87 of the diaphragm spring 24 toward the engine in the axial direction. As a result, the annular elastic portion 8 of the diaphragm spring 24
6 moves away from the pressure plate 25 (more specifically, the fulcrum ring 28) toward the engine side in the axial direction. In this way, when the pressing load from the diaphragm spring 24 to the pressure plate 25 is released, the clutch disk 81 of the clutch disk assembly 13 is separated from the flywheel 16.
In this way, torque transmission from the flywheel 16 to the input shaft 19 is cut off. [Advantages of the clutch release device 6] (1) Since the clutch release device 6 is constituted only by the combination of the motor 31 and the movement direction conversion mechanism 32, the number of parts is small, the structure is simple, and the entire space is small. It is getting smaller. (2) Since only a rigid body such as the moving member 54 and the release bearing 55 is disposed between the motor 31 and the clutch cover assembly 5, a loss in the release operation is reduced. In addition, since no hydraulic pressure is used, there is no efficiency loss due to the hydraulic circuit, and there is no design limitation due to the release load or the release amount. (3) The clutch release device 6 is mounted on the front wall 17 of the transmission within the cover 18 and is arranged concentrically with the input shaft 19. That is, since all the mechanical structures are accommodated in the space that has been wasted in the past, space efficiency is extremely high, and the degree of freedom in layout is high because signals are transmitted by electricity instead of the conventional hydraulic pressure. (4) Since the plurality of cone springs 56 are provided, the necessary torque generated by the motor 31 when performing the release operation can be reduced. In particular, the release load can be minimized by realizing desired characteristics by combining a plurality of cone springs 56. As shown in FIG. 6, the release load of the diaphragm spring 24 has a characteristic that becomes convex on the upper side of the graph, whereas the characteristic of the plurality of cone springs 56 has a characteristic that becomes convex on the lower side of the graph. As described above, since the load directions are reversed, the release load characteristics obtained by combining the two are flat and significantly smaller than the release load characteristics of the diaphragm spring alone. That is, the torque required by the motor 31 is significantly reduced. Therefore, the size and cost of the motor can be significantly reduced.

Furthermore, when the wear follower mechanism 26 is provided in the clutch cover assembly 5, the combined release load characteristic shown in FIG. 6 does not change regardless of the wear of the clutch disk of the clutch disk assembly 13. That is, the preferable combined release load characteristic shown in FIG. 6 is maintained over a long period of time. (5) For example, an SR
If a (switched reluctance) motor is used, low-cost, compact, weighing, high-speed and large-torque performance can be obtained.
In particular, the rotor volume of the SR motor and the thickness of the core of the stator are significantly smaller than those of other series motors. Other Embodiments (1) The urging member for urging the moving member is not limited to the cone spring, and its position and configuration are not limited to the above embodiment. When the output of the motor has a margin or the release load of the clutch is small, it is not always necessary to use the urging member.

FIG. 8 shows an embodiment in which the cone spring is omitted. (2) Further, this release device exhibits the most excellent effect in combination with a clutch cover assembly having a wear-following mechanism, but can also exhibit preferable functions in combination with a clutch cover assembly without a wear-following mechanism. . FIG. 9 shows an embodiment using a normal clutch cover assembly. FIG. 10 shows an embodiment in which the cone spring is omitted and a normal clutch cover assembly is used. (3) In the above embodiment, the clutch release device is used for a push type clutch cover assembly, but may be used for a pull type clutch cover assembly. The motor may be another type of motor such as a stepping motor. Further, a spline is formed between the rotor and the block, and a screw engagement portion is formed between the block and the cylindrical shaft, but these may be formed in reverse. (4) The configuration of the wear following mechanism is not limited to the above embodiment.

[0036]

The clutch release device according to the present invention has a simple structure in which the motor and the movement direction changing mechanism are arranged around the input shaft.

[Brief description of the drawings]

FIG. 1 is a block diagram of a power transmission system employing an embodiment of the present invention.

FIG. 2 is a schematic longitudinal sectional view of a clutch employing a clutch release device as one embodiment of the present invention.

FIG. 3 is a partially enlarged view of FIG. 2 and is a schematic longitudinal sectional view of a clutch release device.

FIG. 4 is a partially enlarged view of FIG. 3;

FIG. 5 is a schematic sectional view for explaining the structure of the motor.

FIG. 6 is a combined release load characteristic diagram.

FIG. 7 is a partial longitudinal sectional view of a clutch cover assembly.

FIG. 8 is a schematic longitudinal sectional view of a clutch according to another embodiment.

FIG. 9 is a schematic longitudinal sectional view of a clutch according to another embodiment.

FIG. 10 is a schematic longitudinal sectional view of a clutch according to another embodiment.

[Explanation of symbols]

 Reference Signs List 6 clutch release device 31 motor 32 movement direction conversion mechanism 35 stator 36 rotor (rotor) 53 block holder 54 moving member 55 release bearing 56 cone spring (biasing member)

Claims (8)

[Claims] 1. A clutch release device for releasing a clutch from an input shaft extending from a front wall of a transmission and a flywheel, comprising: an electric motor; And a movement direction conversion mechanism for converting the movement into a direction and releasing the clutch by an axial force, concentrically around the input shaft. 2. The motor according to claim 1, wherein the motor has a rotor, the movement direction changing mechanism includes a cylindrical shaft fixed to the front wall and arranged around the input shaft, and the rotor and the cylindrical shaft. A moving member that is disposed between the two members so as to move in the axial direction along the cylindrical shaft when the rotor rotates.
4. The clutch release device according to item 1. 3. The clutch release device according to claim 2, wherein said movement direction converting mechanism further includes a release bearing disposed on said clutch side of said moving member. 4. The movement direction converting mechanism further includes an urging member for applying an urging force to the moving member, wherein the urging member is arranged so that the moving member moves in a clutch release direction. The moving member is biased.
Or the clutch release device according to 3. 5. The release load of the clutch is blocked in the movement direction conversion mechanism without the load of the urging member being locked in the movement direction conversion mechanism and affecting the pressing load of the clutch. The clutch release device according to claim 4, wherein the clutch release device does not affect the load of the urging member. 6. The clutch release device according to claim 1, wherein the clutch has an outer periphery covered by a cover extending from the front wall, and the clutch release device is disposed inside the cover. 7. The clutch release device according to claim 1, wherein said clutch release device is detachably attached to said front wall as one assembly. 8. A clutch for intermittently connecting an input shaft extending from a front wall of a transmission and a flywheel, the clutch having a clutch disk disposed close to a friction surface of a flywheel, and having a torque applied to the input shaft. A clutch disc assembly capable of outputting the clutch disc assembly, the clutch disc assembly biasing the clutch disc assembly to the flywheel, a clutch cover fixed to the flywheel, and the clutch disc disposed in the clutch cover. A pressure plate disposed in proximity to the assembly, a diaphragm spring supported by the clutch cover for biasing the pressure plate toward the flywheel, and a diaphragm spring against wear of the clutch disk. Wear to maintain a constant posture A clutch cover assembly having a follow-up mechanism; and the clutch release device according to claim 4, configured to act on the diaphragm spring to release the bias of the diaphragm spring against the pressure plate. Clutch.