JP2003206953A - Clutch engaging/disengaging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clutch engaging/disengaging device for engagement/ disengagement of a clutch by generating hydraulic pressure in a hydraulic mechanism with the rotation of a driving mechanism, reducing the wear of a piston. <P>SOLUTION: The clutch engaging/disengaging device 1 comprises a motor 2, a motion changing mechanism 3 consisting of a reducing mechanism 30, a push rod 33 and a connecting mechanism 40 for changing rotating motion into a linear motion, the hydraulic mechanism for putting the clutch in engagement/disengagement with the linear motion of the motion changing mechanism 3, and a load accumulating mechanism 4 for accumulating a load during the linear motion of the motion changing mechanism 3 in one direction and for releasing the accumulated load during the linear motion of the motion changing mechanism 3 in the opposite direction. The connecting mechanism 40 allows the linear motion of the push rod 33 by transmitting the load of the push rod 33 in the axial direction only, out of the load transmitted from the reducing mechanism 30 to the push rod 33, to the push rod 33. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch connecting / disconnecting device, and more particularly to a clutch connecting / disconnecting device for connecting / disconnecting a clutch by rotating a drive mechanism.

[0002]

2. Description of the Related Art In a clutch connecting / disconnecting device for connecting / disconnecting a clutch of a vehicle, there is a clutch connecting / disconnecting device for operating a clutch by generating a hydraulic pressure by rotating a drive mechanism including a motor and transmitting the hydraulic pressure to a slave cylinder. As such a clutch connecting / disconnecting device, there are a technique described in JP-A-10-119603 and a technique described in JP-A-11-201188. These clutch connecting / disconnecting devices include a drive mechanism including a motor that generates a rotational force, a motion converting mechanism that converts the rotational motion of the motor into a linear motion, and a linear motion of the motion converting mechanism that generates hydraulic pressure to connect and disconnect the clutch. A load accumulating mechanism having a hydraulic mechanism and a coil spring for accumulating a load when the motion converting mechanism linearly moves in one direction and releasing the accumulated load when the motion converting mechanism linearly moves in the opposite direction. It has and. The motion converting mechanism includes a speed reducing mechanism including a worm gear rotated by a motor and a worm wheel meshing with the worm gear,
And a push rod that is linearly moved by the rotation of the worm wheel. The hydraulic mechanism includes a master cylinder that generates a hydraulic pressure and a tandem cylinder that transmits the hydraulic pressure generated in the master cylinder to a slave cylinder. The master cylinder comprises a piston that is pressed by one end of a push rod.

In such a clutch connecting / disconnecting device, when the clutch is connected, the motor is rotated in the reverse (normal) direction to linearly move the motion converting mechanism in one direction,
The load is stored as an elastic force in the coil spring of the load storage mechanism. At this time, since the push rod does not press the piston, hydraulic pressure is not generated in the master cylinder and the clutch is in the connected state. Next, when disengaging the clutch, the motion conversion mechanism is linearly moved in the reverse direction by rotating the motor forward (reverse), and the piston is pressed by the push rod. At this time, the coil spring of the load accumulating mechanism releases the load accumulated as elastic force when the motor rotates in the reverse (normal) direction to assist the pushing of the piston by the push rod. As a result, hydraulic pressure is generated in the master cylinder and the clutch is disengaged.

[0004]

In the clutch connecting / disconnecting device described above, the connecting portion between the push rod and the worm wheel oscillates due to the rotation of the worm wheel, and this oscillating movement causes one end of the push rod to move to the piston. It is moving linearly with respect to. For this reason, the push rod cannot always face straight with respect to the pressing direction of the piston, and one end of the push rod abuts with an inclination according to the swinging motion of the connecting portion between the push rod and the worm wheel. It is like this. As a result, in addition to the load in the pressing direction of the piston, the load in the direction orthogonal to the pressing direction of the piston acts on the piston.
As a result, the side surface of the piston is worn.

An object of the present invention is to reduce wear of a piston in a clutch connecting / disconnecting device for connecting / disconnecting a clutch by generating hydraulic pressure in a hydraulic mechanism by rotation of a drive mechanism.

[0006]

A clutch connecting / disconnecting device according to claim 1 is a clutch connecting / disconnecting device for connecting / disconnecting a clutch by rotation of a drive mechanism, and a reduction mechanism for decelerating rotation of the drive mechanism. A push rod to which a load is transmitted from the reduction gear mechanism, a coupling mechanism, and a hydraulic mechanism that generates hydraulic pressure to connect and disconnect the clutch. The coupling mechanism is interposed between the reduction gear mechanism and the push rod, and transmits only the load in the push rod axial direction among the loads transmitted from the reduction gear mechanism to the push rod to the push rod for linear movement. There is. The hydraulic mechanism has a piston that is pressed by one end of the push rod.

In this clutch connecting / disconnecting device, the speed reducing mechanism and the push rod are connected via the connecting mechanism. According to this connecting mechanism, since the connecting portion of the push rod with the speed reducing mechanism does not swing, the push rod is pushed. When the piston is pressed by the rod, the load in the direction orthogonal to the pressing direction of the piston does not act. Thereby, wear of the piston can be reduced.

According to a second aspect of the present invention, there is provided the clutch connecting / disconnecting device according to the first aspect, wherein the coupling mechanism includes a rolling member and a rolling surface portion. The rolling member is provided on one of the speed reducing mechanism and the push rod. The rolling surface portion is provided on the other of the reduction mechanism and the push rod so as to sandwich the rolling member in the push rod axial direction, and the rolling member can roll and move in a direction intersecting the push rod axial direction.

A clutch connecting / disconnecting device according to a third aspect of the present invention is the clutch connecting / disconnecting device according to the first or second aspect, wherein the load is accumulated when the push rod linearly moves in one direction and the push rod linearly moves in the opposite direction. It further comprises a load accumulating mechanism for discharging the load accumulated in the. Since this clutch connecting / disconnecting device includes the load accumulating mechanism, a large pressing load can be obtained when the piston is pressed by the push rod. With this, it is possible to apply the load when the push rod is moved in the opposite direction by the driving mechanism having a low driving force.

According to a fourth aspect of the present invention, there is provided the clutch connecting / disconnecting device according to the third aspect, wherein the load accumulating mechanism has a spring which is connected to the push rod and is capable of expanding and contracting with linear movement of the push rod. A clutch connecting / disconnecting device according to a fifth aspect is the clutch connecting / disconnecting device according to the third or fourth aspect, wherein the load accumulating mechanism immovably supports the spring in a direction orthogonal to the linear movement direction of the push rod and linearly moves the push rod. It further has a support member which immovably supports in a direction orthogonal to the direction.

In this clutch connecting / disconnecting device, since the spring and the push rod constituting the load accumulating mechanism are both supported by the supporting member in the direction orthogonal to the linear movement direction of the push rod, the expansion / contraction direction of the spring and the push rod are pushed. The linear movement direction of the rod can always be the same direction,
It is possible to suppress the loss of load due to the deviation of the moving direction.

According to a sixth aspect of the present invention, there is provided a clutch connecting / disconnecting device according to any one of the first to fifth aspects, wherein the reduction mechanism has a worm gear rotated by a drive mechanism and a worm wheel meshing with the worm gear. In this clutch connecting / disconnecting device, the rotation motion of the drive mechanism is transmitted to the push rod by using the reduction mechanism consisting of the worm gear and the worm wheel. Even when the reverse torque is applied from the mechanism, the worm wheel is locked by the meshing of the worm gear and the worm wheel, and the position of the push rod can be held.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIG. 1 shows a schematic side view of a clutch connecting / disconnecting device 1 according to a first embodiment of the present invention, and FIG. 2 is a schematic top sectional view of the clutch connecting / disconnecting device 1. Show. (1) Configuration The clutch connecting / disconnecting device 1 shown in FIGS. 1 and 2 operates a clutch by generating hydraulic pressure by rotation of a drive mechanism including a motor 2 and transmitting the hydraulic pressure to a slave cylinder (not shown). Is.

The clutch connecting / disconnecting device 1 includes a motor 2 and a motion converting mechanism 3 for converting a rotational motion of the motor 2 into a linear motion.
And a hydraulic mechanism that engages and disengages the clutch by the linear motion of the motion conversion mechanism 3, and a load is accumulated when the motion conversion mechanism 3 linearly moves in one direction, and the motion conversion mechanism 3 linearly moves in the opposite direction. And a load accumulating mechanism 4 for discharging the accumulated load.

The housing 5 is a member for accommodating the motion converting mechanism 3 and the load accumulating mechanism 4, and is composed of a housing main body 51 and a housing lid 52 (see FIG. 2) covering the side surface of the housing main body 51. . Here, FIG.
Shows a state in which the housing lid 52 is removed to show the inside of the housing 5 of the clutch connecting / disconnecting device 1.

The motor 2 has a motor shaft 21 connected to an end of a worm gear 31 described later. Motor shaft 2
An engaging portion 21a having a width across flats is formed at the tip of the No. 1. The motor 2 is capable of forward and reverse rotation. Here, the O-O axis in the figure is the rotation axis of the motor 2. <Motion Conversion Mechanism> The motion conversion mechanism 3 is interposed between the reduction mechanism 30 for reducing the rotation of the motor 2, the push rod 33 to which the load is transmitted from the reduction mechanism 30, and the reduction mechanism 30 and the push rod 33. And a connecting mechanism 40. The connecting mechanism 40 is a mechanism for linearly moving the push rod 33 by transmitting only the axial load of the push rod 33 among the loads transmitted from the reduction mechanism 30 to the push rod 33 to the push rod 33.

The reduction mechanism 30 includes a worm gear 31 rotated by the motor 2 and a worm wheel 32 meshing with the worm gear 31. Worm gear 3
1, bearings 37 and 38 are press-fitted into both ends, respectively, and the bearing 1 is supported by the lower portion of the housing 5. Worm gear 31
Of the motor shaft 21 at the end of the
A concave portion 31a is formed so as to sandwich it from the axial direction. As a result, the worm gear 31 is attached to the lower portion of the housing 5 by O-.
It is rotatably supported around the O-axis and is rotationally driven by the motor 2.

The worm wheel 32 is a worm gear 3
It is a gear for converting the rotational motion of the No. 1 around the O-O axis into the rotational motion of the worm wheel 32 around the P-P axis. The worm wheel 32 has a substantially fan-shaped worm wheel main body 32 a pivotally supported by the housing 5 around the PP axis via the wheel shaft 39, and the worm gear 3.
An arc-shaped gear portion 32b that meshes with the gear 1, and a gear portion 32b
And a rod connecting part 32c extending in a direction symmetrical to the PP axis and provided with a rolling member 34. The rod connecting portion 32c has a pin shape centered on the QQ axis.

The connecting mechanism 40 is provided with a rolling member 34 formed of a ball bearing provided in the rod connecting portion 32c of the worm wheel 32, and a rolling member provided so as to sandwich the rolling member 34 in the axial direction of a push rod 33 described later. The moving member 34 is composed of a wheel connecting portion 33a having a rolling surface portion that can roll and move in a direction intersecting the axial direction of the push rod 33. The rolling member 34 includes a rod connecting portion 32c.
The ball race is press-fitted into the outer race 34a of which the outer race 34a can roll around the QQ axis. The wheel connecting portion 33a is specifically, the housing lid 52.
From the side toward the inside of the housing main body 52, the side surface of the recess in the axial direction of the push rod 33 serves as a rolling surface portion, and the outer surface of the rolling member 34 with respect to the rolling surface portion. Race 34a is push rod 33
It is possible to roll in a direction orthogonal to the axial direction of (1) (vertical direction in the plane of FIG. 1).

The push rod 33 is a rod-shaped member to which the rotational movement of the worm wheel 32 about the PP axis is transmitted. The push rod 33 is a wheel connecting portion 33a which is a part of the connecting mechanism 40 described above, and a piston 61 which will be described later. Push rod 33
A front end portion 33b that abuts the end portion on the side and transmits a linear motion,
It comprises a front end portion 33b and a rear end portion 33c which extends in a direction symmetrical to the Q-Q axis and is connected to a load accumulating mechanism 4 described later.

<Hydraulic Mechanism> The hydraulic mechanism includes a master cylinder 6 that generates hydraulic pressure by pressing the front end portion 33b of the push rod 33, and a tandem cylinder (not shown) for transmitting the hydraulic pressure generated in the master cylinder 6 to slave cylinders. And). The master cylinder 6 includes a cylindrical cylinder 62 arranged on the front end portion 33b side of the push rod 33 of the housing 5, and a piston 6 fitted inside the cylinder 62 via seal rings 63 and 64.
It is mainly composed of 1.

The cylinder 62 has a flange portion 62a formed at the end portion on the push rod 33 side, and is fixed to the side surface of the housing main body 51 by a plurality of bolts 35. Then, the front end portion 33 of the push rod 33
b is inserted into the cylinder 62 through a hole 36 formed in the surface of the housing 5 on the master cylinder 6 side. The push rod 33 is immovably supported by the hole 36 in a direction orthogonal to the axial direction of the push rod 33.

The piston 61 is a columnar member inserted into the cylinder 62, and has a recess 61a with which the front end 33b of the push rod 33 abuts. Here, the central axis of the push rod 33 is arranged on the pressing direction of the piston 61, that is, the central axis S-S. <Load Accumulation Mechanism> The load accumulation mechanism 4 includes an assist spring 41, a spring cover 44 for supporting one end of the assist spring 41, and the assist spring 41.
And a rear end portion 33c of the push rod 33 having a role of a spring seat for supporting the other end of the push rod 33.

The assist spring 41 is composed of, for example, a coil spring, and accumulates a load when the push rod 33 linearly moves toward the side opposite to the piston 61, and accumulates a load when the push rod 33 linearly moves toward the piston 61. It is a member for releasing the applied load. The assist spring 41 is arranged on the side opposite to the piston 61 of the push rod 33 so that the push rod 33 can expand and contract in the same direction as the direction of pressing the piston 61.

The spring cover 44 is a member for supporting the end portion of the assist spring 41 on the side opposite to the piston 61, and extends inside the plate-shaped cover body 44a and the coil at the end portion of the assist spring 41 on the side opposite to the piston 61. It is composed of a cylindrical portion 44b. Cover body 44a
Are fixed to the side surface of the housing 5 by a plurality of bolts 43. Here, the spring cover 44 is fixed such that the coil center of the end portion of the assist spring 41 on the side opposite to the piston 61 is arranged on the central axis line S-S of the piston 61. As a result, the assist spring 4
The coil center of 1 and the central axis of the push rod 33 are
It is arranged on the central axis line S-S of the piston 61.

(2) Operation The operation of the clutch connecting / disconnecting device 1 will be described with reference to FIG. Here, the forward rotation direction of the worm wheel 32 (the direction in which the piston 61 is pressed by the linear movement of the push rod 33) is defined as the rotation direction R, and the motor 2 and the worm gear 31 when the worm wheel 32 rotates in this R direction. The rotation direction of is the forward rotation direction.

First, from the state where the center of the rod connecting portion 32c of the worm wheel 32 is at the position of Q1 shown in FIG. 1, that is, the position of the worm wheel 32 shown by the chain double-dashed line in FIG. Drive in the reverse rotation direction. Then, the rotation generated by the rotation of the motor 2 is transmitted to the worm wheel 32 via the worm gear 31, and the worm wheel 32 rotates in the opposite R direction. Thereby, the rod connecting portion 32c of the worm wheel 32
Swings its center from Q1 to Q2 to the position of Q, and moves the wheel connecting portion 33a of the push rod 33 to the side opposite to the piston 61 via the rolling member 34.
Specifically, the outer race 34a of the rolling member 34 presses the wheel connecting portion 33a toward the side opposite to the piston 61 while rolling the wheel connecting portion 33a in the vertical direction. In other words, the push rod 33 is always in linear contact with the pushing direction of the piston 61 in a straight line while the rod connecting portion 32c swings. At this time, at the same time, the assist spring 41 of the load accumulating mechanism 4 is compressed by the rear end portion 33c of the push rod 33 to accumulate the load (the worm wheel 32 shown by the solid line in FIG. 1,
Push rod 33, piston 61). In this state, the hydraulic pressure is not generated in the master cylinder 6, so that the clutch is engaged. Then, the motor 2 is stopped.

Next, the motor 2 is driven in the forward rotation direction.
Then, the rotation generated by the rotation of the motor 2 is transmitted to the worm wheel 32 via the worm gear 31, and the worm wheel 32 rotates in the R direction. This allows
The rod connecting portion 32c of the worm wheel 32 swings its center from Q to the position of Q1 via Q2, and moves the wheel connecting portion 33a of the push rod 33 to the piston 61 side via the rolling member 34. Let In particular,
The outer race 34a of the rolling member 34 rolls the wheel connecting portion 33a in the vertical direction, and
A is pressed to the piston 61 side. In other words, the push rod 33 is always in linear contact with the pushing direction of the piston 61 in a straight line while the rod connecting portion 32c swings. At this time, at the same time, the assist spring 41 of the load accumulating mechanism 4 releases the load accumulated in the pushing direction of the piston 61 with respect to the push rod 33 to assist the pushing of the piston 61 by the push rod 33. In this state, the master cylinder 6
A hydraulic pressure is generated in the clutch, and the clutch (not shown) is released.

(3) Characteristic Reduction of Piston Wear In the clutch connecting / disconnecting device 1 of this embodiment, since the worm wheel 32 and the push rod 33 are connected via the connecting mechanism 40, the piston 61 is connected by the push rod 33. When pressed, the piston 61 can be brought into straight contact with the pressing direction of the piston 61 and can move linearly, and a load in a direction orthogonal to the pressing direction of the piston 61 does not act.
Thereby, the wear of the piston 61 can be reduced.

Smooth Discharge of Accumulated Load In the clutch connecting / disconnecting device 1 of the present embodiment, the assist spring 41 constituting the load accumulating mechanism 4 can be expanded / contracted in the same direction as the push rod 33 presses the piston 61. Therefore, when the push rod 33 presses the piston 61, the load accumulated in the assist spring 41 can be released smoothly.

Holding Function of Push Rod Position when Motor Stops In the clutch connecting / disconnecting device 1 of this embodiment, the worm gear 3 is used.
Since the motion converting mechanism 3 composed of 1 and the worm wheel 32 is used to convert the rotary motion into the swing motion,
Even when the rotation of the motor 2 is stopped and a reverse torque is applied to the worm wheel 32 from the hydraulic mechanism or the load accumulating mechanism 4, the worm wheel 32 is locked by the engagement of the worm gear 31 and the worm wheel 32 and is pushed. The position of the rod 33 is held.

[Second Embodiment] FIG. 3 is a schematic top sectional view of a clutch connecting / disconnecting device 101 according to a second embodiment of the present invention.
The structure of the clutch connecting / disconnecting device 101 of the second embodiment is basically the same as that of the first embodiment. Here, the shape of the housing is different from that of the first embodiment.

The housing body 151 of the housing 105 of this embodiment extends so as to support the outer circumference of the assist spring 141, and further supports the rear end portion 133c of the push rod 133 so as not to move in the direction orthogonal to the S-S axis. Has been extended to. That is, the housing body 151
Pushes the assist spring 141 to the push rod 133
Has a role as a support member that immovably supports the push rod 133 in a direction orthogonal to the linear movement direction and immovably supports the push rod 133 in a direction orthogonal to the linear movement direction.

As a result, in the clutch connecting / disconnecting device 101 of the present embodiment, in addition to the effects obtained in the first embodiment,
The direction in which the assist spring 141 expands and contracts and the direction in which the push rod 133 moves linearly can always be made to be the same direction, and the loss of load due to the deviation in the direction of motion can be suppressed. [Third Embodiment] FIG. 4 is a schematic top sectional view of a clutch connecting / disconnecting device 201 according to a third embodiment of the present invention.

The structure of the clutch connecting / disconnecting device 201 of the third embodiment is similar to that of the second embodiment, except that the assist spring 2 is used.
41 and the rear end portion 233c of the push rod 233 S-
The only difference is that the support in the direction orthogonal to the S axis is carried out by a tubular support member 253 fitted to the housing body 251. Also in the clutch connecting / disconnecting device 201 of the present embodiment, the same effect as in the second embodiment can be obtained.

[Fourth Embodiment] FIG. 5 is a schematic top sectional view of a clutch connecting / disconnecting device 301 according to a fourth embodiment of the present invention.
The structure of the clutch connecting / disconnecting device 301 of the fourth embodiment is the third
Instead of fixing the tubular support member to the housing as in the embodiment, the tubular support member 353 is fixed to the rear end portion 333c of the push rod 333, and the outer peripheral portion of the assist spring 341 and the housing body 351 are By sliding between them, the assist spring 341 and the rear end portion 333c of the push rod 333 are supported.

Also in the clutch connecting / disconnecting device 301 of the present embodiment, the same effect as in the third embodiment can be obtained. [Fifth Embodiment] Fig. 6 is a schematic top sectional view of a clutch connecting / disconnecting device 401 according to a fifth embodiment of the present invention.

In the structure of the clutch connecting / disconnecting device 401 of the fifth embodiment, the cylindrical support member 453 is not disposed on the outer peripheral side of the assist spring in the third embodiment, but the cylindrical support member 453 is used. It is arranged inside the coil. And the push rod 433
A columnar portion 433d extending inside the support member 453 is formed at the rear end portion 433c, and the push rod 43
3 is supported by the support member 453 so as not to move in a direction orthogonal to the axial direction of the push rod 433.

Also in the clutch connecting / disconnecting device 401 of the present embodiment, the same effect as in the third embodiment can be obtained. [Sixth Embodiment] FIG. 7 shows a schematic side view of a clutch connecting / disconnecting device 501 according to a sixth embodiment of the present invention, and FIG. 8 is a schematic top sectional view thereof.

The structure of the clutch connecting / disconnecting device 501 of the sixth embodiment is basically the same as that of the first embodiment. Here, the connecting mechanism is different from that of the first embodiment in that the connecting mechanism is provided on the push rod side. Connection mechanism 5 of the present embodiment
40 is a wheel connecting portion 533 of the push rod 533.
A rolling member 534 including a hole centered on the Q-Q axis provided in a and a needle bearing press-fitted into the hole.
And a rolling surface portion that sandwiches the rolling member 534 formed on the rod connecting portion 532c of the worm wheel 532 from both axial sides of the push rod 533. The needle portion 534a of the rolling member 534 is rollable around the QQ axis.

With the above structure, the worm wheel 53
2 is rotated, the needle portion 534 of the rolling member 534 is rotated.
Since “a” moves by rolling in the vertical direction on the rolling surface portion of the rod connecting portion 532c, the load that moves the push rod 533 in the axial direction among the loads given by the swing of the rod connecting portion 532c of the worm wheel 532. Only this can be transmitted to the wheel connecting portion 533a of the push rod 533.

As a result, also in the clutch connecting / disconnecting device 501 of the present embodiment, the same effect as in the first embodiment can be obtained. [Seventh Embodiment] FIG. 9 is a schematic top sectional view of a clutch connecting / disconnecting device 601 according to a seventh embodiment of the present invention.

The structure of the clutch connecting / disconnecting device 601 of the seventh embodiment is different only in that the end of the needle portion of the rolling member on the housing lid side of the sixth embodiment is supported by the housing lid 652. Specifically, the needle portion 632 of the rolling member 632 is provided on the inner surface of the housing lid 652.
A groove 652a having the same linear shape as the movement trajectory of a is formed, and supports the end of the needle portion 632a on the housing lid 652 side.

In the clutch connecting / disconnecting device 601 of this embodiment, in addition to the effect obtained in the sixth embodiment, the linear movement of the push rod 633 is stabilized.

[0045]

In the clutch connecting / disconnecting device according to the present invention, since the reduction mechanism and the push rod are connected via the connecting mechanism, when the piston is pressed by the push rod, it is orthogonal to the pressing direction of the piston. The load in the moving direction does not act, and the wear of the piston can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic side view of a clutch connecting / disconnecting device according to a first embodiment of the present invention.

FIG. 2 is a schematic top cross-sectional view of the clutch connecting / disconnecting device according to the first embodiment of the present invention.

FIG. 3 is a schematic top sectional view of a clutch connecting / disconnecting device according to a second embodiment of the present invention.

FIG. 4 is a schematic top cross-sectional view of a clutch connecting / disconnecting device according to a third embodiment of the present invention.

FIG. 5 is a schematic top sectional view of a clutch connecting / disconnecting device according to a fourth embodiment of the present invention.

FIG. 6 is a schematic top sectional view of a clutch connecting / disconnecting device according to a fifth embodiment of the present invention.

FIG. 7 is a schematic side view of a clutch connecting / disconnecting device according to a sixth embodiment of the present invention.

FIG. 8 is a schematic top cross-sectional view of a clutch connecting / disconnecting device according to a sixth embodiment of the present invention.

FIG. 9 is a schematic top sectional view of a clutch connecting / disconnecting device according to a seventh embodiment of the present invention.

[Explanation of symbols]

1, 101, 201, 301, 401, 501, 601
Clutch connecting / disconnecting device 2 Motor (drive mechanism) 3 Motion conversion mechanism 4 Load accumulation mechanism 30 Reduction mechanism 31 Worm gear 32, 532 Worm wheel 532c Rod connecting portion (rolling surface portion) 33, 133, 233, 333, 433, 533, 63
3 Push rod 33a Wheel connection part (rolling surface part) 40, 540 Connection mechanism 41, 141, 241, 341, 441 Assist spring (spring) 151 Housing body (support member) 253, 353, 453 Support member 61 Piston

Claims (6)

[Claims] 1. A clutch connecting / disconnecting device for connecting / disconnecting a clutch by rotation of a drive mechanism, comprising: a reduction mechanism for reducing the rotation of the drive mechanism; a push rod for transmitting a load from the reduction mechanism; In order to linearly move the push rod by transmitting only the load in the push rod axial direction among the loads that are interposed between the reduction mechanism and the push rod and transmitted from the reduction mechanism to the push rod. And a hydraulic mechanism that has a piston that is pressed by one end of the push rod and that generates hydraulic pressure to connect and disconnect the clutch. 2. The connecting mechanism includes a rolling member provided on one of the speed reducing mechanism and the push rod, and the rolling member sandwiched in the other of the speed reducing mechanism and the push rod in the push rod axial direction. 2. The clutch connecting / disconnecting device according to claim 1, further comprising: a rolling surface portion that is provided in such a manner that the rolling member can roll and move in a direction intersecting the push rod axial direction. 3. A load accumulating mechanism for accumulating a load when the push rod linearly moves in one direction and discharging a load accumulated when the push rod linearly moves in the opposite direction. The clutch connecting / disconnecting device according to claim 1 or 2. 4. The clutch connecting / disconnecting device according to claim 3, wherein the load accumulating mechanism includes a spring which is connected to the push rod and is capable of expanding and contracting with linear movement of the push rod. 5. The load accumulating mechanism immovably supports the spring in a direction orthogonal to the linear movement direction of the push rod and immovably supports the push rod in a direction orthogonal to the linear movement direction. The clutch connecting / disconnecting device according to claim 3 or 4, further comprising a supporting member for controlling. 6. The clutch connecting / disconnecting device according to claim 1, wherein the reduction mechanism has a worm gear rotated by the drive mechanism and a worm wheel meshing with the worm gear.