JP2004308709A - Clutch operating mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a power loss in a driving mechanism of a clutch operating mechanism when engaging a clutch. <P>SOLUTION: The clutch operating mechanism 8 of a clutch device 1 for applying a pushing load to a pressure plate 72 of a clutch cover assembly 7 is provided with a driving mechanism 81, a reduction gear mechanism 82 and a movement direction converting mechanism 83. The reduction gear mechanism 82 has a worm gear 91 to be rotated by the driving mechanism 81 and a worm wheel 92 arranged around an input shaft 4 and engaged with the worm gear 91. The movement direction converting mechanism 83 has an operating member 101 and a moving member 102, and applies a pushing load to the pressure plate 72 with the axial movement of the moving member 102, and while it can apply a cancel load to the clutch cover 71 in a direction opposite to the pushing load. The operating member 101 is provided to be rotated in relation to the clutch cover 71 through a bearing, and the worm wheel 92 is fixed to the operating member 101. The moving member 102 is moved in the axial direction by rotation of the operating member. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a device for transmitting and interrupting torque between a clutch operating mechanism, in particular, a flywheel connected to a crankshaft and an input shaft of a transmission, and includes a friction connecting portion disposed close to the flywheel. A clutch disc assembly having a clutch disc assembly connected to an input shaft, and a clutch cover assembly having a clutch cover fixed to a flywheel and a pressure plate pressing a frictional connection portion against the flywheel. The present invention relates to a clutch operation mechanism for applying a pressing load to a plate.
[0002]
[Prior art]
The clutch device is mounted on a crankshaft of an engine of a vehicle, and transmits and cuts torque from the engine to a transmission. The clutch device includes, for example, a flywheel fixed to a tip of a crankshaft, a clutch disc assembly having a friction coupling portion disposed close to a friction surface of the flywheel and coupled to an input shaft of a transmission, The clutch cover assembly includes a clutch cover assembly mounted on the flywheel and capable of pressing the friction coupling portion toward the flywheel side, and a clutch operation mechanism for applying an operation load to the clutch cover assembly to perform a clutch operation.
[0003]
As a clutch cover assembly used in such a clutch device, there is a direct push type clutch cover assembly in which a clutch connection operation is performed by applying a pressing load from a clutch operation mechanism. The direct push type clutch cover assembly consists of a clutch cover fixed to the flywheel, a pressure plate located inside the clutch cover and close to the frictional connection, and a lever plate supported by the clutch cover and abutting against the pressure plate. It is configured. In this case, the clutch operation mechanism applies a pressing load to the pressure plate by pressing the lever plate.
[0004]
As such a clutch operating mechanism, for example, as in a clutch operating mechanism described in Japanese Patent Application No. 2003-32305, a drive mechanism such as a motor, and the pressure plate that converts rotation of the drive mechanism into axial movement. And a motion direction conversion mechanism capable of applying a pressing load to the moving direction. Here, as the movement direction conversion mechanism, an operation member having a first screw portion rotatably provided on the clutch cover via a bearing via a bearing and having a first screw portion and a feed screw screwed to the first screw portion. And a moving member having a second screw portion forming a mechanism.
[0005]
In this clutch operating mechanism, the operating member is rotated by the driving mechanism, thereby moving the moving member in the axial direction with respect to the clutch cover, applying a pressing load to the pressure plate via the moving member, and engaging the clutch. be able to. In addition, when the clutch is engaged, a pressing load can be applied to the pressure plate via the moving member, and a canceling load can be applied to the clutch cover via the operating member on the side opposite to the pressing load. The load acting on the crankshaft can be reduced.
[0006]
[Problems to be solved by the invention]
In the above-described clutch operation mechanism, it is necessary to maintain a state in which the movement direction conversion mechanism applies a pressing load to the pressure plate when the clutch is engaged.
Therefore, if the movement direction conversion mechanism does not have a self-locking function, the driving mechanism must apply a rotational force to the movement direction conversion mechanism even after the clutch connection operation to maintain the axial position of the moving member. Must.
[0007]
On the other hand, in the case where the movement direction converting mechanism including the above-described feed screw mechanism is employed, the first screw portion of the operation member and the second screw portion of the moving member that constitute the feed screw mechanism are provided at an appropriate pitch. Thus, even after the application of the rotational force from the drive mechanism to the movement direction conversion mechanism is stopped after the clutch connection operation, the axial position of the moving member is maintained. However, since the operation member is rotatably supported by the clutch cover via the bearing, the rotation of the clutch cover is transmitted to the operation member by the sliding resistance, or the clutch member is rotated by unexpected vibration. There is a possibility that the moving member may be moved in a direction in which the connection state is released. For this reason, even when a movement direction conversion mechanism including a feed screw mechanism is employed, it is necessary to always apply a rotational force from the drive mechanism to the movement direction conversion mechanism in order to reliably maintain the clutch connection state. is there.
[0008]
As described above, constantly applying a rotational force from the drive mechanism to the movement direction conversion mechanism when the clutch is engaged leads to an increase in power loss of the drive mechanism in the clutch operation mechanism.
An object of the present invention is to reduce power loss of a driving mechanism of a clutch operating mechanism when a clutch is engaged.
[0009]
[Means for Solving the Problems]
The clutch operating mechanism according to claim 1, wherein the clutch operating mechanism is a device for transmitting and interrupting torque between a flywheel connected to a crankshaft and an input shaft of a transmission, and is a friction connecting portion disposed close to the flywheel. And a clutch cover assembly having a clutch cover fixed to a flywheel and a pressure plate for pressing a frictional connection portion against the flywheel. A clutch operating mechanism for applying a pressing load to the pressure plate, comprising a drive mechanism, a speed reduction mechanism, and a movement direction conversion mechanism. The speed reduction mechanism has a worm gear rotated by the drive mechanism, and a worm wheel arranged around the input shaft and meshing with the worm gear. The movement direction conversion mechanism has an operating member and a moving member, and can apply a pressing load to the pressure plate by moving the moving member in the axial direction, and can apply a canceling load to the clutch cover on the side opposite to the pressing load. It is possible. The operating member is provided on the clutch cover via a bearing so as to be relatively rotatable, and the worm wheel is fixed. The moving member moves in the axial direction by rotation of the operation member.
[0010]
In this clutch operation mechanism, the rotation of the drive mechanism is imparted to the movement direction conversion mechanism via a reduction mechanism including a worm gear and a worm wheel. Therefore, even when the application of the rotational force from the drive mechanism to the movement direction conversion mechanism is stopped when the clutch is engaged, the self-locking function of the speed reduction mechanism including the worm gear and the worm wheel allows the movement member of the movement direction conversion mechanism to rotate. The directional position is maintained, and the clutch engagement state is maintained. As a result, it is possible to reduce the power loss of the drive mechanism of the clutch operation mechanism when the clutch is engaged.
[0011]
According to a second aspect of the present invention, in the clutch operation mechanism according to the first aspect, the operation member has a first screw portion. The moving member has a second screw portion that is screwed to the first screw portion to form a feed screw mechanism.
In this clutch operation mechanism, since the movement direction conversion mechanism including the feed screw mechanism is employed, even if the application of the rotational force from the drive mechanism to the movement direction conversion mechanism is stopped after the clutch connection operation, basically, The position of the moving member in the axial direction is held by the self-locking function of the feed screw mechanism.
[0012]
However, since the operation member is rotatably supported by the clutch cover via the bearing, the rotation of the clutch cover is transmitted to the operation member by the sliding resistance, or the clutch member is rotated by unexpected vibration. A case where the moving member is moved in a direction in which the connection state is released may occur.
In this clutch operating mechanism, even with such a phenomenon, the rotation of the operating member can be self-locked by utilizing the self-locking function of the speed reduction mechanism. Even if the application is stopped, the axial position of the moving member can be reliably held.
[0013]
According to a third aspect of the present invention, in the clutch operation mechanism according to the first or second aspect, the clutch cover assembly has a lever plate that abuts on the pressure plate and is pressed toward the pressure plate by the axial movement of the moving member. ing.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a clutch device employing a clutch operation mechanism according to an embodiment of the present invention will be described with reference to the drawings.
(1) Configuration of Clutch Device FIG. 1 shows a clutch device 1 according to an embodiment of the present invention. Here, OO in the figure is the rotation axis of the clutch device 1. The clutch device 1 is a device for transmitting and interrupting torque from a flywheel 3 connected to a crankshaft 2 on the axial engine side (left side in FIG. 1) to an input shaft 4 on the axial transmission side (right side in FIG. 1). is there.
[0015]
In the present embodiment, the flywheel 3 is an annular member, and is fixed to the distal end of the crankshaft 2 via a disk-shaped flexible plate 5. Specifically, the inner peripheral portion of the flywheel 3 is fixed to the outer peripheral portion of the flexible plate 5 by a plurality of bolts 51, and the inner peripheral portion of the flexible plate 5 is fixed to the distal end portion of the crankshaft 2 by a plurality of bolts 52. Fixed. That is, the torque of the crankshaft 2 is transmitted to the flywheel 3 via the flexible plate 5. Here, since the flexible plate 5 is thinner than the crankshaft 2 and the flywheel 3, the flexible plate 5 has sufficient rigidity in the rotation direction, but has low rigidity in the bending direction. ing.
[0016]
On the transmission side of the clutch device 1, a transmission housing 11 is arranged. The transmission housing 11 has a front wall 11a disposed on the transmission side of the clutch device 1. A bell-shaped cylindrical portion 11b is formed so as to cover the outer peripheral side of the clutch device 1 from the outer peripheral portion of the front wall 11a. Extending. Further, a cylindrical tubular shaft 12 extending in the axial direction is fixed to the front wall 11 a so as to cover the outer peripheral side of the input shaft 4.
[0017]
The clutch device 1 mainly includes a clutch disk assembly 6, a clutch cover assembly 7, and a clutch operation mechanism 8.
The clutch disk assembly 6 includes a friction connecting portion 61 disposed on the outer peripheral side and formed of friction facing and the like, a damper mechanism 62 including a clutch plate and a retaining plate fixed to the friction connecting portion 61 and a coil spring, and the like. And a hub flange 63 connected to the mechanism 62. The friction connecting portion 61 is arranged close to the friction surface 3 a of the flywheel 3. The inner peripheral portion of the hub flange 63 is spline-engaged with the input shaft 4.
[0018]
The clutch cover assembly 7 is a mechanism that is mounted on the flywheel 3 and presses and releases the friction coupling portion 61 of the clutch disc assembly 6 with respect to the flywheel 3. The clutch cover assembly 7 mainly includes a clutch cover 71, a pressure plate 72, and a lever plate 73.
The clutch cover 71 is a dish-shaped member having a large-diameter hole formed in the center. The outer peripheral end of the clutch cover 71 is fixed to the flywheel 3 by a plurality of bolts 74. Further, the clutch cover 71 is formed with a tubular portion 71a extending toward the inner peripheral side and proximate to a clutch operation mechanism 8 described later. In this embodiment, the cylindrical portion 71a is a cylindrical portion extending toward the transmission.
[0019]
The pressure plate 72 is disposed inside the clutch cover 71. For this reason, the surface on the transmission side on the outer peripheral side of the pressure plate 72 is covered with the clutch cover 71. The pressure plate 72 has a pressing surface 72 a facing the frictional connection portion 61 of the clutch disk assembly 6. Further, a plurality of protruding portions 72b extending toward the transmission side are formed on the inner peripheral side of the transmission side surface (the surface opposite to the pressing surface 72a) of the pressure plate. The pressure plate 72 is connected to the clutch cover 71 at a plurality of positions in the circumferential direction so as to be relatively non-rotatable and movable in a predetermined range in the axial direction by the strap plate 75. Further, the strap plate 75 urges the pressure plate 72 toward the transmission when the clutch is engaged.
[0020]
The lever plate 73 is an annular member having a center hole. In the lever plate 73, a plurality of slits extending radially outward from the inner peripheral edge thereof and a plurality of slits radially extending radially outward from the outer peripheral edge are formed alternately in the circumferential direction. By forming a large number of slits in this way, the lever plate 73 fixes the axial displacement of the outer peripheral edge thereof, and when the axial displacement is given near the inner peripheral edge, the lever plate 73 has a minimum rigidity. It has no structure. That is, when a displacement is given under such conditions, only a small amount of elastic energy is stored inside the lever plate 73, so that the lever plate has an integral structure in which each lever portion is connected in the circumferential direction. Works similarly to a single lever. The outer peripheral edge of the lever plate 73 is engaged with a pin fixed to the clutch cover 71, and the engagement causes the lever plate 73 to rotate integrally with the clutch cover 71. The transmission-side surface of the outer peripheral end of the lever plate 73 is in contact with the clutch cover 71. Further, a radially intermediate portion of the lever plate 73 is in contact with the protrusion 72 b of the pressure plate 72.
[0021]
The clutch operating mechanism 8 is a mechanism for applying a pressing load to the clutch cover assembly 7 (specifically, applying a pressing load to the pressure plate 72 via the lever plate 73). The clutch operating mechanism 8 also has a function of applying a canceling load to the clutch cover 71 on the side opposite to the pressing load when applying the pressing load. In this way, the clutch operation load is balanced as the internal force of the clutch device 1 to reduce or eliminate the load on the engine. As a result, the load on the thrust bearing of the crankshaft 2 of the engine is reduced.
[0022]
The clutch operation mechanism 8 is disposed on the outer periphery of the input shaft 4 and on the transmission side of the inner periphery of the lever plate 73. As shown in FIG. 2, the clutch operation mechanism 8 mainly includes a drive mechanism 81, a speed reduction mechanism 82, and a movement direction conversion mechanism 83. Here, FIG. 2 is a sectional view taken along line AA of FIG.
As shown in FIG. 2, the drive mechanism 81 is a motor disposed below the input shaft 4 so as to be orthogonal to the OO axis and connected to an end of a worm gear 91 described later. The drive mechanism 81 is capable of both forward and reverse rotation. Here, the axis PP in the figure is the rotation axis of the drive mechanism 81.
[0023]
The speed reduction mechanism 82 is a mechanism that reduces the rotational movement of the drive mechanism 81, and mainly includes a worm gear 91 that is rotated by the drive mechanism 81, and a worm wheel 92 that meshes with the worm gear 91.
The worm gear 91 is disposed in a cylindrical housing 93 extending along the front wall 11a of the transmission housing 11. An opening 93a is formed in an upper portion of the housing 93 so as to correspond to a position where the worm gear 91 and the worm wheel 92 mesh. The housing 93 is fixed to the front wall 11a via bolts 94 and the like.
[0024]
The worm wheel 92 is a gear for converting the rotational movement of the worm gear 91 about the PP axis into a rotational movement about the OO axis (that is, the input shaft 4). The worm wheel 92 is fixed to an outer peripheral surface of an operation member 101 described later.
The movement direction conversion mechanism 83 is a mechanism that converts the rotational movement of the worm wheel 92 of the reduction mechanism 82 into the movement in the axial direction (that is, the OO axis direction), and mainly includes the operation member 101, the moving member 102, It is composed of
[0025]
The operating member 101 is an annular member disposed radially between the tubular portion 71a of the clutch cover 71 and the tubular shaft 12, and is relatively opposed to the tubular portion 71a of the clutch cover 71 via the first bearing 84. It is rotatably supported. In the present embodiment, a trapezoidal female screw 101a (first screw portion) is provided on the inner peripheral surface of the operation member 101. A worm wheel 92 is fixed to the outer peripheral surface of the operation member 101, so that rotation of the drive mechanism 81 is transmitted.
[0026]
The moving member 102 is an annular member disposed on the inner peripheral side of the operation member 101, and is spline-engaged with the outer peripheral surface of the cylindrical shaft 12 to engage the cylindrical shaft 12 (that is, with the front wall 11a). It is supported so as to be non-rotatable and movable in the axial direction. On the outer peripheral surface of the moving member 102, a male screw 102a (second screw portion) screwed to the female screw 101a is formed. A feed screw mechanism 103 is formed by screwing the female screw 101a and the male screw 102a. When the feed screw mechanism 103 rotates with respect to the cylindrical shaft 12 (that is, with respect to the front wall 11a), the moving member 102 moves in the axial direction. It is designed to move.
[0027]
Further, a second bearing 85 is arranged between the moving member 102 and the inner peripheral end of the lever plate 73. The second bearing 85 has a function of transmitting the axial load from the moving member 102 to the lever plate 73 without transmitting the rotation of the lever plate 73 to the moving member 102. Specifically, the outer race of the second bearing 85 is in contact with the transmission side surface of the inner peripheral portion of the lever plate 73, and the inner race of the second bearing 85 is fixed to the moving member 102 by press fitting or the like.
[0028]
(2) Operation of Clutch Device Next, the operation of the clutch device 1 will be described with reference to FIGS. Here, FIG. 3 is an enlarged view of the vicinity of the clutch operation mechanism 8 in FIG. 1, and is a view showing a state in which a pressing load is not applied to the pressure plate 72. FIG. 4 is an enlarged view of the vicinity of the clutch operation mechanism 8 in FIG. 1, and is a view showing a state in which a pressing load is applied to the pressure plate 72.
[0029]
(1) Clutch connection Before the clutch is connected, the moving member 102 and the second bearing 85 are arranged at the lever plate 73 and the second bearing 85 shown by the solid line in FIG. 1 and at the position shown in FIG. That is, no pressing load is applied from the second bearing 85 to the inner peripheral end of the lever plate 73, and as a result, the pressure plate 72 does not press the friction coupling portion 61 against the flywheel 3.
[0030]
When the driver operates, for example, a clutch pedal or the like, the drive mechanism 81 of the clutch operation mechanism 8 is energized to rotate the worm gear 91 of the reduction mechanism 82 about the PP axis in conjunction with the movement. This rotation is transmitted to the worm wheel 92 and converted into rotation about the OO axis. At this time, the rotation is reduced according to the gear ratio between the worm gear 91 and the worm wheel 92. Then, the operation member 101 is rotated by the rotation of the worm wheel 92.
[0031]
Then, as shown by an arrow X in FIG. 4, the moving member 102 moves to the engine side by the feed screw mechanism 103, and accordingly, the second bearing 85 also moves to the engine side. As a result, the second bearing 85 applies a pressing load to the inner peripheral end of the lever plate 73, and the posture of the lever plate 73 changes. Here, a load larger than the pressing load from the moving member 102 is applied to the pressure plate 72 in accordance with the lever ratio of the lever plate 73 (the pressure plate 72, the lever plate 73, and the 2 bearing 85). As a result, the pressing surface 72a of the pressure plate 72 pushes the friction connecting portion 61 toward the engine, and frictionally engages the friction connecting portion 61 with the flywheel 3. As a result, the torque from the flywheel 3 is transmitted to the clutch disk assembly 6 and output to the input shaft 4.
[0032]
In this clutch connected state, the clutch cover 71 is urged toward the transmission by the reaction force generated in the feed screw mechanism 103. That is, a load on the transmission side is applied to the cylindrical portion 71a of the clutch cover 71.
As described above, the flywheel 3 is applied with the pressing load from the pressure plate 72 and the frictional connection portion 61 to the engine side, and at the same time, the load (cancel load) from the clutch cover 71 to the transmission side. Therefore, the load acting on the crankshaft 2 from the flywheel 3 is reduced.
[0033]
{Circle around (2)} Holding the clutch connection state After performing the above-described clutch connection operation, the power supply to the drive mechanism 81 is stopped (that is, the application of the rotational force from the drive mechanism 81 to the movement direction conversion mechanism 83 is stopped). At this time, the operation member 101 is not rotated by the self-locking function of the speed reduction mechanism 82 including the worm gear 91 and the worm wheel 92. Thus, even when the power supply to the drive mechanism 81 is stopped, the moving member 102 is held at the axial position in the clutch connected state.
[0034]
Moreover, in the present embodiment, since the feed screw mechanism 103 is employed as the movement direction conversion mechanism 83, the position of the moving member 102 in the axial direction is maintained by the self-lock function of the feed screw mechanism 103, and the worm gear 91 The rotation of the operation member 101 can be prevented by the self-locking function of the speed reduction mechanism 82 including the worm wheel 92.
[0035]
Therefore, the torque is transmitted from the clutch cover 71 to the operation member 101 by a slight sliding resistance of the first bearing 84, or the operation member 101 is rotated by an unexpected vibration, and the moving member 102 is moved in the axial direction. As a result, the position of the moving member 102 in the axial direction when the power supply to the drive mechanism 81 is stopped after the clutch coupling operation is securely held.
[0036]
(3) Disengagement of the clutch In the above-mentioned clutch connection state, when the drive mechanism 81 of the clutch operating mechanism 8 is energized so that the worm gear 91 rotates in the opposite direction to that in the clutch connection, the worm wheel 92 also operates in the opposite direction to the clutch connection. Therefore, the operation member 101 is rotated in the direction opposite to that when the clutch is engaged. Then, as shown by an arrow Y in FIG. 3, the moving member 102 moves to the transmission side by the feed screw mechanism 103, and accordingly, the second bearing 85 also moves to the transmission side. Thus, the application of the pressing load from the second bearing 85 to the inner peripheral portion of the lever plate 73 is released. At this time, the pressure plate 72 to which no pressing load is applied moves to the transmission side by the urging force from the strap plate 75. As a result, the friction connecting portion 61 of the clutch disk assembly 6 is separated from the flywheel 3, and the clutch connection is released.
[0037]
(3) Features of the clutch operating mechanism The clutch operating mechanism 8 of the present embodiment has the following features.
{Circle around (1)} In the clutch operating mechanism 8, the rotation of the drive mechanism 81 is applied to the movement direction converting mechanism 83 via the reduction mechanism 82 including the worm gear 91 and the worm wheel 92. Therefore, even when the application of the rotational force from the drive mechanism 81 to the movement direction changing mechanism 83 is stopped when the clutch is engaged, the movement direction changing mechanism is formed by the self-locking function of the reduction mechanism 82 including the worm gear 91 and the worm wheel 92. The position of the moving member 102 in the axial direction is held, and the clutch connection state is held. Thereby, the power loss of the drive mechanism 81 of the clutch operation mechanism 8 at the time of clutch engagement can be reduced.
[0038]
{Circle around (2)} In the clutch operating mechanism 8, the pressing load applied from the lever plate 73 to the pressure plate 72 is obtained by adding the lever ratio and the reduction ratio of the reduction mechanism 82 to the load applied from the moving member 102 to the inner peripheral portion of the lever plate 73. It is determined by multiplication. In this manner, by transmitting the torque of the drive mechanism 81 to the moving member 102 via the speed reduction mechanism 82 including the worm gear 91 and the worm wheel 92, the power of the drive mechanism 81 during clutch operation can be reduced. The advantage of reducing the capacity of the drive mechanism 81 can also be obtained.
[0039]
(3) The clutch operation mechanism 8 employs the movement direction conversion mechanism 83 including the feed screw mechanism 103. Therefore, even if the drive mechanism 81 is de-energized after the clutch connection operation, basically, the feed screw The axial position of the moving member 102 is held by the self-locking function of the mechanism 103.
However, since the operation member 101 is rotatably supported by the clutch cover 71 via the first bearing 84, the rotation of the clutch cover 71 is transmitted by the sliding resistance, and the operation member 101 is rotated by unexpected vibration. Accordingly, a case where the moving member 102 is moved in a direction in which the clutch engagement state is released may occur.
[0040]
The clutch operating mechanism 8 can self-lock the rotation of the operating member 101 by utilizing the self-lock function of the speed reduction mechanism 82 against such a phenomenon. Thus, the axial position of the moving member 102 can be reliably held.
(4) Other Embodiments Although the embodiments of the present invention have been described based on the drawings, the specific configuration is not limited to these embodiments, and can be changed without departing from the spirit of the invention. It is.
[0041]
In the above-described embodiment, a motor is employed as the drive mechanism. However, the present invention is not limited to this, and any operation member may be used as long as it can rotationally drive a reduction mechanism including a worm gear and a worm wheel.
In addition, although the feed screw mechanism is employed as the movement direction conversion mechanism, the invention is not limited thereto, and any mechanism that can convert the rotation of the worm wheel into the movement in the axial direction may be used.
[0042]
【The invention's effect】
As described in the above description, in the clutch operation mechanism according to the present invention, the rotation of the drive mechanism is applied to the movement direction conversion mechanism via the reduction mechanism including the worm gear and the worm wheel. Therefore, even when the application of the rotational force from the drive mechanism to the movement direction conversion mechanism is stopped when the clutch is engaged, the self-locking function of the speed reduction mechanism including the worm gear and the worm wheel allows the movement member of the movement direction conversion mechanism to rotate. The directional position is maintained, and the clutch engagement state is maintained. As a result, it is possible to reduce the power loss of the drive mechanism of the clutch operation mechanism when the clutch is engaged.
[Brief description of the drawings]
FIG. 1 is a schematic longitudinal sectional view of a clutch device employing a clutch operation mechanism according to an embodiment of the present invention.
FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 3 is a partially enlarged view of FIG. 1 and is a schematic longitudinal sectional view near a clutch operating mechanism.
FIG. 4 is a partially enlarged view of FIG. 1 and is a schematic longitudinal sectional view near a clutch operation mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Clutch device 2 Crankshaft 3 Flywheel 4 Input shaft 6 Clutch disk assembly 7 Clutch cover assembly 8 Clutch operating mechanism 71 Clutch cover 72 Pressure plate 81 Drive mechanism 82 Reduction mechanism 83 Motion direction conversion mechanism

Claims (3)

A device for transmitting and interrupting torque between a flywheel connected to a crankshaft and an input shaft of a transmission, the device having a frictional connection portion disposed close to the flywheel and connected to the input shaft. A clutch device comprising: a clutch disc assembly; and a clutch cover assembly having a clutch cover fixed to the flywheel and a pressure plate for pressing the frictional connection portion against the flywheel. A clutch operating mechanism for imparting
A drive mechanism,
A worm gear rotated by the drive mechanism, and a reduction mechanism having a worm wheel disposed around the input shaft and meshing with the worm gear;
The clutch cover has an operating member provided rotatably via a bearing via a bearing, and the worm wheel is fixed, and a moving member that moves in the axial direction by rotation of the operating member. A movement direction conversion mechanism capable of applying a pressing load to the pressure plate by moving, and applying a canceling load to the clutch cover on the side opposite to the pressing load,
A clutch operating mechanism equipped with. The operation member has a first screw portion,
The moving member has a second screw portion that is screwed into the first screw portion to constitute a feed screw mechanism.
The clutch operating mechanism according to claim 1. 3. The clutch operating mechanism according to claim 1, wherein the clutch cover assembly has a lever plate that comes into contact with the pressure plate and is pressed toward the pressure plate by an axial movement of the moving member. 4. .

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