JP2001124107A - Clutch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple, compact, light-weight and inexpensive structure for a clutch device. SOLUTION: Arms 4, 4 as movable bodies are mounted on a second rotary shaft 2 integrally rotatably, and radially inwardly and outwardly displaceably, the arms are radially outwardly and inwardly displaced in accompany with the rotation at a desired angle, of a first rotary shaft by a cam mechanism 6 consisting of engagement pins 10, 10 formed on an annular flange 1a of the first rotary shaft 1 and cam grooves 8, 8 formed on end parts 4a, 4a of the arms 4, 4, the arms are locked immovably in the circumferential direction by a fixed cylinder 5 as a fixed body when the arms are radially outwardly displaced, and the circumferential movement of the arms is permitted when the arms are radially inwardly displaced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission system in which power is transmitted between two rotating bodies which are coaxially opposed to each other.
The present invention relates to a clutch device that couples two rotating bodies so as to be able to rotate synchronously when rotating power is input to the rotating body, and that causes the second rotating body to be in a non-rotating state when rotating power is input to the second rotating body.

[0002]

2. Description of the Related Art In a conventional clutch device of this type,
When the first rotating body is driven to rotate by a power source such as a motor, and this rotating power is transmitted to the second rotating body,
A worm speed reducer or an electromagnetic brake is employed as a mechanism for bringing the second rotating body into a non-rotating state when rotational power is input to the second rotating body.

[0003]

The structure of a clutch device using a worm speed reducer or an electromagnetic brake is complicated, and its size is large and heavy, so that it is very expensive. Therefore, such a clutch device is not suitable for simple, small, lightweight and inexpensive applications.

Accordingly, the present invention provides a clutch device having a structure suitable for a simple, compact, lightweight and inexpensive application while satisfying a latch function equivalent to a worm speed reducer or an electromagnetic brake. .

[0005]

A first clutch device according to the present invention is interposed between the power transmissions of two rotating bodies coaxially opposed to each other, and rotational power is input to the first rotating body. A clutch device that, when rotating power is input to the second rotating body, causes the second rotating body to be in a non-rotating state while the two rotating bodies are synchronously rotatable. A movable body that is rotatable and displaceable inward and outward in the radial direction, and locks the movable body in the circumferential direction immovably when the movable body is displaced radially outward, while the movable body is in the radial direction. A fixed body that allows circumferential movement of the movable body when displaced inward, and a required angle of one of the rotating bodies provided between an end face of the movable body and the other rotating body. Cam displacing the movable body radially in and out with the rotation of Characterized in that had a structure.

The second clutch device of the present invention is interposed between the power transmissions of the two rotating members disposed coaxially and opposed to each other, and when both the rotating members are input to the first rotating member. A synchronously rotatable coupling device that, when rotational power is input to the second rotating body, causes the second rotating body to be in a non-rotating state. Arm-shaped movable body, and fixedly disposed on the outer peripheral side of the inner end portions of these two rotating bodies, and locks the movable body circumferentially immovably when the movable body is displaced radially outward. On the other hand, when the movable body is displaced radially inward, a cylindrical fixed body that allows the movable body to move in the circumferential direction, between the end face of the movable body and the other rotating body. A cam mechanism provided for elastically displacing the movable body radially in and out. It is characterized in.

A third clutch device according to the present invention is interposed between the power transmissions of two rotating bodies disposed coaxially and opposed to each other, and when both the rotating bodies are inputted to the first rotating body. A synchronously rotatable coupling device that, when rotational power is input to the second rotating body, causes the second rotating body to be in a non-rotating state, wherein a radial displacement is applied to an inner end portion of one of the rotating bodies. Two movable bodies that are provided so as to be fixed, and are arranged in a fixed state on the outer peripheral side of the inner end portions of these two rotating bodies, and move the movable bodies in the circumferential direction when the movable bodies are displaced radially outward. While being immovably locked, a cylindrical fixed body that allows the movable body to move in the circumferential direction when the movable body is displaced radially inward, and an end face of the movable body and the other rotating body. And a cam mechanism provided between the movable members to displace the movable body in and out in the radial direction. It is characterized in.

The fourth clutch device of the present invention is the first clutch device of the present invention.
In the clutch device according to any one of the third to third aspects, the lock is formed by a gear structure, an uneven structure, or a friction structure provided on both opposing surfaces of the movable body and the fixed body.

The fifth clutch device of the present invention is the same as the first clutch device of the present invention.
In any one of the clutch devices according to any one of the fourth to fourth aspects, the cam mechanism includes a pin provided on one of the opposing surfaces of the movable body and the other rotating body and a cam groove provided on the other. And

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below based on embodiments shown in the drawings.

FIGS. 1 to 4 relate to a first embodiment of the present invention. FIG. 1 is a side sectional view of a clutch device in a state where a second rotation shaft is not rotated. FIG. FIG. 3 is a side cross-sectional view of the clutch device for transmitting rotational power to the second rotation shaft, FIG. 3 is an exploded perspective view of the clutch device, and FIG.
(B) and (c) are each a plan view showing a cam operation of the cam mechanism of the clutch device.

In these figures, reference numeral 1 denotes a first rotating shaft as a first rotating body which is rotated by a power source such as a motor;
Reference numeral 2 denotes a second rotating shaft serving as a second rotating body disposed coaxially with the first rotating shaft 1.

Reference numeral 3 denotes a clutch device according to the embodiment.

The clutch device 3 is basically interposed between the power transmissions of the rotating shafts 1 and 2, and synchronizes the rotating shafts 1 and 2 when the rotating power is input to the first rotating shaft 1. While being rotatably connected, the second rotating shaft 2 is brought into a non-rotating state when rotating power is input to the second rotating shaft 2.

The clutch device 3 includes arms 4 and 4 as movable bodies, a fixed cylinder 5 as a fixed body, and a cam mechanism 6 (which includes cam grooves 8 and 8 and engagement pins 10 and 10 to be described later). ).

The arms 4 and 4 are attached to the inner end of the second rotary shaft 2 in a bifurcated manner so as to be integrally rotatable and displaceable in and out in the radial direction.

The arms 4, 4 are formed integrally with the second rotating shaft 2, but are formed separately from the second rotating shaft 2, and are mounted on the second rotating shaft 2 by mounting with screws or by fitting unevenness. 2 may be attached to the inner end portion.

The arms 4 and 4 are opposed to each other by 180 degrees and extend in the other axial direction.
A wedge-shaped gap 4a extends in the radial direction and has a flange shape, and becomes larger in the axial direction between the two radially opposed portions.
Is configured.

Each of the arms 4 and 4 is made of a resin material having elasticity and can be displaced inward and outward in the radial direction, and is reduced in diameter inward so as to narrow the wedge-shaped gap 7. It has an elastic restoring force that is displaced radially outward when displaced.

In order to provide such a restoring force, the second rotating shaft 2 integrally provided with the arms 4 and 4 is preferably made of an elastic material such as a resin material. When the arm 2 and the shaft 2 are configured separately, only the arms 4 and 4 may be made of an elastic material such as a resin material. When only the arms 4 and 4 are made of an elastic material such as a resin material, the ends of the second rotating shaft 2 and the ends of the arms 4 and 4 may be spline-fitted to prevent the arms 4 and 4 from rotating.

The outer peripheral surfaces of both ends 4a, 4a of the arms 4, 4 are each formed in an arc shape along the inner peripheral surface of the fixed cylinder 5, and the inner periphery of each of the ends 4a, 4a. The surfaces have opposing surfaces parallel to each other.

The ends 4a, 4a,
In the axial plane of 4a, semicircular cam grooves 8, 8 in this embodiment 1 are formed.

The ends 4a, 4a,
4a, several lock teeth 9,
Are formed in the circumferential direction.

An annular flange 1a is formed integrally with the first rotary shaft 1 on the outer circumferential surface on one side in the axial direction of the first rotary shaft 1, and a pair of engaging pins 10 at 180 ° circumferential intervals are formed on the side surfaces thereof. , 10 are formed.

The engagement pins 10, 10 are engaged with the cam grooves 8, 8 of the ends 4a, 4a of the arms 4, 4 respectively, and are brought into the engagement positions with the rotation of the first rotary shaft 1 at a required angle. The arms 4 and 4 are displaced inward and outward in the radial direction by the change.

The annular flange 1a is connected to the first rotating shaft 1
It may be configured separately from the first rotary shaft 1 by mounting with screws or fitting with unevenness.

If an area for forming the engaging pins 10 and 10 can be secured on one end face in the axial direction of the first rotary shaft 1, the annular flange 1a is omitted and the engaging pin 1 is provided on the end face.
0, 10 may be formed.

The cam grooves 8, 8 and the engagement pins 10,
10, the cam mechanism 6 is constituted.

The fixed cylinder 5 locks the arms 4 and 4 circumferentially immovably when the ends 4a and 4a of the arms 4 and 4 are displaced radially outward, while the ends 4a and 4 are fixed.
a is displaced radially inward,
Is allowed to move in the circumferential direction.

The fixed cylinder 5 has a circular cross-section, and its radially outer peripheral portion is fixed to an appropriate fixing point 5a, and inside the annular flange 1a and the ends 4a, 4a of the arms 4, 4, respectively. Are arranged concentrically. The facing surfaces of the annular flange 1a and the ends 4a, 4a are fixed cylinder 5
They are coaxially opposed inside.

On the entire inner peripheral surface of the fixed cylinder 5, arms 4, 4
A large number of lock teeth 11 meshing with the lock teeth 9 on the outer periphery of each end 4a, 4a are formed in the circumferential direction.

The lock teeth 9 and 11 are connected to the arms 4 and 4
Each of the lock members locks the inner peripheral surface of the fixed cylinder 5 in the circumferential direction.

This lock body is not limited to the meshing of lock teeth.
Locking may be performed by engagement of one or more uneven structures on the outer peripheral surface of each end 4a, 4a with the uneven structure on the inner peripheral surface of the cylinder 6, or the outer peripheral surface of these ends 4a, 4a. Locking by friction between the inner cylinder 5 and the inner peripheral surface of the fixed cylinder 5 may be used.

The operation will be described with reference to FIG.

(A) When the motor is stopped and rotational power is not being input to the first rotating shaft 1, the ends 4a and 4a of the arms 4 and 4 are moved by the elastic restoring force of the arms 4 and 4 respectively. 4A, the outer periphery of these ends 4a, 4a is pressed against the inner peripheral surface of the fixed cylinder 5, and the lock teeth 9,
11 are in a state of meshing.

Since the arms 4 and 4 are locked in the circumferential direction and cannot rotate, the second rotating shaft 2 is in a non-rotating state even if rotating power is input to the second rotating shaft 2. The second rotating shaft 2 is separated from the first rotating shaft 1 with respect to transmission of rotational power.

(B) From the state of (a), when a rotational power is input to the first rotating shaft 1 driven by the motor, the annular flange 1a is rotated integrally therewith.

Then, the two engaging pins 10 on the side surface of the annular flange 1a are connected to the ends 4 of the arms 4 and 4, respectively.
a, 4a, and the two engaging pins 10, 10 abut against and press against the inner wall on the left or right side of the grooves of the cam grooves 8, 8, so that End 4a,
4a is displaced radially inward against the elastic restoring force of the arms 4, 4, and when the first rotating shaft 1 rotates clockwise, as shown in FIG. When 1 rotates in the counterclockwise direction, it is separated from the inner peripheral surface of the fixed cylinder 5 as shown in FIG.

In this case, since the curvature of the semicircular cam grooves 8, 8 is the same as the curvature of the movement locus arc of the engagement pins 10, 10, both engagement pins 10, 10 are connected to the cam grooves 8, 10. Ends 4a, 4
a is not displaced inward in the radial direction.
4a is displaced with a twist in a radially oblique direction by the rotational power of the two engaging pins 10, 10. This displacement is performed until both ends 4a, 4a abut.

As a result, the engagement between the lock teeth 9 and 11 on the inner peripheral surface of the fixed cylinder 5 and the outer periphery of the end portions 4 a and 4 a is released, and the arms 4 and 4 rotate with the rotation of the first rotating shaft 1. The rotation of the first rotating shaft 1 is transmitted to the second rotating shaft 2.

(C) When the motor stops and the rotational power is no longer input to the first rotary shaft 1, the engagement with the cam grooves 8, 8 acting on the ends 4a, 4a of the arms 4, 4 respectively. Arms 4 and 4 are smaller than the engaging force of mating pins 10 and 10.
The radially outward elastic restoring force of the arm 4
The outer periphery of each end 4a, 4a abuts on the inner periphery of the fixed cylinder 5, and the lock teeth 9, 11 are brought into a meshing state again as shown in FIG. As a result, (a)
State.

As a result, the clutch device of the embodiment is
While satisfying the clutch function equivalent to a worm reducer or an electromagnetic brake, the structure is simple, and the structure is suitable for small, lightweight and inexpensive applications.

The present invention is not limited to the first embodiment, and various applications and modifications are conceivable.

(1) In the first embodiment, the cam grooves 8,
8 is a semicircular arc and has the same curvature as the arc of the movement trajectory of the engaging pins 10 and 10, but is not limited to this. For example, as shown in the second embodiment of FIGS. 5A to 5C, the cam grooves 8, 8 are formed in a circle having a curvature larger than the curvature of the circumference described by the movement locus of the engagement pins 10, 10. The groove may have an arc shape or a straight groove shape.

FIG. 5A corresponds to FIG. 4A, FIG. 5B corresponds to FIG. 4B, and FIG. 5C corresponds to FIG.

In the case of FIG. 5, since the curvature of the circle drawn by the movement locus of both engagement pins 10, 10 is smaller than the curvature of the shape of the cam grooves 8, 8, both engagement pins 10, 10 rotate. Then, the cam grooves 8, 8 are pressed while being in contact with the inner peripheral walls of the cam grooves 8, 8, and the ends 4a, 4a are linearly displaced radially inward. Parts 4a, 4
a does not need to be twisted.

The operation and effect are as described above in (a), (b) and (c).
Therefore, the detailed description is omitted.

(2) In the first and second embodiments, the arms 4 and 4 as movable bodies are configured so as to be able to rotate integrally with the second rotary shaft 2, but the present invention is not limited to this. 6
As shown in Embodiment 3 of FIG. 9, the movable body may be configured separately from the second rotation shaft 2.

FIG. 6 is a side sectional view of the clutch device when the second rotating shaft is not rotated, and FIG. 7 is a clutch device when the rotating power of the first rotating shaft is transmitted to the second rotating shaft. 8 is an exploded perspective view of the clutch device, and FIGS. 9A, 9B, and 9C are plan views showing cam operations of a cam mechanism provided in the clutch device.

Referring to FIGS. 6 to 8, first rotating shaft 1
Has a pair of engagement pins 10 at intervals of 180 degrees on an annular flange 1a on one axial side.

A pair of opposing walls 20, 20 are formed on the inner end surface 2a of the second rotary shaft 2 in the axial direction so as to oppose each other in parallel.

The opposing walls 20, 20 have opposing surfaces 20a, 20b, 20a, respectively, adjacent to each other in the radial direction. A step surface is formed between the facing surfaces 20a, 20b, 20a. In this manner, the movable bodies 21 and 21 are guided so as to be displaceable radially outward at the inner end portion of the second rotary shaft 2 in a region surrounded by the inner end surface 2a and the respective opposing surfaces 20a, 20b and 20a. A guide is formed, and the movable bodies 21 and 21 are attached to the guide.

The movable members 21 and 21 are separated from the second rotating shaft 2 by this guide structure.

Each of the movable members 21 and 21 has a guide / restrictor 21b projecting from the side surface 21a.
Are slidably guided in the radial direction on the opposing surfaces 20a of the opposing walls 20, 20, and the amount of displacement is regulated by the step surface between the opposing surfaces 20a and 20b, so that they can be displaced in the radial direction.

The movable members 21 and 21 also have a bottom surface 20c,
It has a radially outward arcuate peripheral surface 21d provided with several lock teeth 9, and an opposing surface 21e having cam grooves 8, 8 of the same shape as shown in the second embodiment. .

In this case, the engagement pin 10 and the cam groove 8
A cam mechanism 6 for displacing the movable bodies 21 and 21 radially in and out.
Is configured.

Reference numeral 5 indicates that, similarly to the first embodiment, when the movable members 21 and 21 are displaced radially outward, the movable members 21 and 21 are locked immovably in the circumferential direction.
When the movable body 21 is displaced radially inward,
A fixed cylinder is formed as a cylindrical fixed body that allows the circumferential movement of 21.

Reference numeral 30 denotes an elastic member which is housed between the opposed end faces of the movable bodies 21 and 21 to urge the movable bodies 21 and 21 radially outward to stabilize the engagement of the lock teeth 9 and 11. It is a spring.

The operation will be described with reference to FIG.

In the clutch device of the third embodiment, when the motor is stopped and the rotational power is not input to the first rotating shaft 1, the movable members 21 and 21 are moved inside the guide portion as shown in FIG. Are displaced by being guided radially outward, and the lock teeth 9, 9 are the lock teeth 1 of the fixed cylinder 5 as a fixed body.
1 is in a state of engagement.

The movable members 21 and 21 are formed by this engagement.
Is locked in the circumferential direction and cannot rotate,
Even if rotational power is input to the second rotating shaft 2, the second rotating shaft 2
Are in a non-rotating state and are separated from the first rotating shaft 1 with respect to transmission of rotational power of the second rotating shaft 2.

In this state, when rotational power is input to the first rotating shaft 1 driven by the motor, the engagement pins 10 of the first rotating shaft 1 are changed according to the rotating direction of the first rotating shaft 1 by the motor. As shown in FIG. 9B or 9C, the movable members 21 and 21 move in the cam grooves 8 and 8 respectively.

The cam grooves 8, 8 of the engagement pins 10, 10
The movement trajectory inside is the same as in the second embodiment, and a detailed description thereof will be omitted.

As a result, the movable bodies 21 and 21 are displaced while being guided linearly inward in the radial direction in the guide portion.
As a result of the lock teeth 9, 9 of the movable bodies 21, 21 being separated from the lock teeth 11 of the fixed cylinder 5, the movable bodies 21, 21 are allowed to rotate in the circumferential direction together with the rotation of the first rotating shaft 1, The rotating power of the first rotating shaft 1 is transmitted to the second rotating shaft 2.

As a result, the clutch device of the third embodiment satisfies the same clutch function as the worm speed reducer and the electromagnetic brake, similarly to the clutch device of the first embodiment.
The structure is simple, and the structure is suitable for small, lightweight and inexpensive applications.

(3) In the case of the third embodiment, the cam grooves 8, 8
Is the same as that of the second embodiment, but as in the fourth embodiment of FIGS. 10 and 11, the movable bodies 21 and 21 are configured separately from the second rotating shaft 2 as in the third embodiment. The shape of the cam grooves 8, 8 may be the same as in the first embodiment.

The locus of movement of the two engaging pins 10, 10 with respect to the cam grooves 8, 8 in the fourth embodiment is the same as that in the first embodiment, and a detailed description thereof will be omitted.

Referring to FIG. 10, a pair of engagement pins 10, 10 spaced at 180 degrees are provided on annular flange 1a on one axial side of first rotary shaft 1.

A pair of opposing walls 20, 20 are formed on the inner end face 2a in the axial direction of the second rotating shaft 2 so as to oppose each other in parallel.

The two opposing walls 20, 20 have opposing surfaces 20a, 20b, respectively, adjacent to each other in the radial direction. A step surface 20c is formed between the facing surfaces 20a and 20b.

Then, the opposing surface 20a of the one opposing wall 20
And the opposing surface 20b of the other opposing wall 20 and the opposing walls 2
The inner end surface 2a of the second rotary shaft 2 between 0 and 20 constitutes a guide portion for guiding one movable body 21 at the inner end portion of the second rotary shaft 2 so as to be displaceable radially outward.

Further, the other movable body 21 is moved radially at the inner end portion of the second rotary shaft 2 by the opposing surface 20a of the opposing wall 20, the opposing surface 20b of the other opposing wall 20, and the inner end surface 2a. A guide portion for guiding outwardly displaceably is configured.

As a result, both movable bodies 21 and 21
It is separate from the rotating shaft 2.

The movable bodies 21 and 21 include a side surface 21a having a length along the facing surface 20a, a side surface 21b having a length along the facing surface 20b, a facing surface 20a of one facing wall 20 and the other facing wall. The bottom surface 20 having an opposing length between the opposing surfaces 20b of the base 20
c, and when the bottom surface 20c abuts on the step surface 20c, a displacement more than necessary inward in the radial direction is regulated.

The movable members 21 and 21 further include a plurality of lock teeth 9 and 9 on a radially outward arcuate peripheral surface 21d and a plurality of lock teeth 9 and 9 on the surface 21e facing the first rotation shaft 1 in the first embodiment. It has cam grooves 8, 8 of the same shape as shown.

In this case, the engagement pin 10 and the cam groove 8
A cam mechanism 6 for displacing the movable bodies 21 and 21 radially in and out.
Is configured.

Reference numeral 5 indicates that, similarly to the first embodiment, when the movable members 21 and 21 are displaced radially outward, the movable members 21 and 21 are locked immovably in the circumferential direction.
When the movable body 21 is displaced radially inward,
A fixed cylinder is formed as a cylindrical fixed body that allows the circumferential movement of 21.

Reference numeral 30 denotes an elastic member which is housed between the opposing end surfaces of the movable bodies 21 and 21 to urge the movable bodies 21 and 21 radially outward to stabilize the engagement of the lock teeth 9 and 11. It is a spring.

The operation will be described with reference to FIG.

In the clutch device of the fourth embodiment, when the motor is stopped and the rotational power is not being input to the first rotating shaft 1, the movable members 21 and 21 are moved inside the guide portion as shown in FIG. Is displaced by being guided radially outward,
The lock teeth 9 and 9 are in a state of being engaged with the lock teeth 11 of the fixed cylinder 5 as a fixed body.

The movable members 21 and 21 are formed by this engagement.
Is locked in the circumferential direction and cannot rotate,
Even if rotational power is input to the second rotating shaft 2, the second rotating shaft 2
Are in a non-rotating state and are separated from the first rotating shaft 1 with respect to transmission of rotational power of the second rotating shaft 2.

In this state, when rotational power is input to the first rotating shaft 1 driven by the motor, the engaging pins 10, 10 of the first rotating shaft 1 are changed according to the rotating direction of the first rotating shaft 1 by the motor. Then, as shown in FIG. 11B or 11C, the movable bodies 21 and 21 move in the cam grooves 8 and 8 respectively.

The cam grooves 8, 8 of the engagement pins 10, 10 are provided.
The movement trajectory inside is the same as in the first embodiment, and a detailed description thereof will be omitted.

As a result, the movable bodies 21 and 21 are displaced while being guided obliquely in the radial direction by the guide portions, and the lock teeth 9 of the movable bodies 21 and 21 are separated from the lock teeth 11 of the fixed cylinder 5. As a result, the movable bodies 21 and 21 are allowed to rotate in the circumferential direction together with the rotation of the first rotating shaft 1, and the rotational power of the first rotating shaft 1 is transmitted to the second rotating shaft 2.

As a result, the clutch device of the fourth embodiment satisfies the clutch function equivalent to that of the worm speed reducer or the electromagnetic brake, similarly to that of the first embodiment.
The structure is simple, and the structure is suitable for small, lightweight and inexpensive applications.

As described above, in Embodiments 1 and 2,
In the third and fourth embodiments, the movable body is formed separately from the second rotating shaft, and the shape of the cam groove is varied.

(4) Each of the above-described embodiments 1 to 4
In the cam mechanism 6, the position of the engaging pin 10 in the cam groove 8 when the movable body is displaced radially outward and is locked in the circumferential direction by the fixed body is defined as the lock position, and the first rotation is performed. No matter which direction the shaft 1 rotates, the engagement pin 1
Numeral 0 is movable in the cam grooves 8, 8 in any direction from the lock position, displaces the movable body radially inward, and allows the movable body to move in the circumferential direction. .

In this case, as Embodiment 5, the engagement pin 1
0 can be moved in the cam groove 8 only in one direction from the lock position, and the movable body is displaced radially inward only when the first rotary shaft 1 rotates in that direction, so that the circumferential direction of the movable body While the first rotating shaft 1 rotates in the opposite direction, the engaging pin 10 is disabled from the locked position and the movable body is maintained in the circumferentially immobile state. Is also good.

(5) Each of the clutch devices of the first to fifth embodiments can be applied to, for example, a continuously variable transmission, an electric power steering, and other mechanical devices.

[0090]

According to the first to third clutch devices of the present invention, the clutch device is constituted by a combination of a simple structure including a movable body, a fixed body, and a cam mechanism. Unlike a clutch device that is complicated, heavy and expensive due to the use of a brake,
The clutch device is suitable for small, lightweight and inexpensive applications.

In particular, in the case of the second clutch device of the present invention,
Since the movable body is in the form of a bifurcated arm, a simple structure that can be elastically formed using a resin or the like and can be locked to the fixed body in the circumferential direction is possible. Can be configured.

Further, in particular, in the case of the third clutch device of the present invention, since the movable body is constituted by two movable bodies provided at the inner end portion of one of the rotating bodies so as to be displaceable in the radial direction, the movable body is provided. Can be configured separately from the second rotating body, and a smaller, lighter and less expensive clutch device can be configured.

According to the fourth clutch device of the present invention, the lock structure for moving the movable body in the circumferential direction is provided by a gear structure, a concave-convex structure, or a friction structure provided on both opposing surfaces of the movable body and the fixed body. And an inexpensive clutch structure.

The cam mechanism of the fifth clutch device of the present invention comprises:
Since the pin and the cam groove are used, a simpler and less expensive clutch structure is obtained.

[Brief description of the drawings]

FIG. 1 shows a clutch device according to a first embodiment of the present invention,
Side sectional view when the second rotating shaft is not rotated

FIG. 2 is a side cross-sectional view of the clutch device according to the first embodiment when the rotation power of a first rotation shaft is transmitted to a second rotation shaft;

FIG. 3 is an exploded perspective view of the clutch device according to the first embodiment.

FIG. 4 is a plan view showing a cam operation of a cam mechanism provided in the clutch device according to the first embodiment.

FIG. 5 shows a clutch device according to a second embodiment of the present invention;
Each plan view corresponding to FIG.

FIG. 6 shows a clutch device according to a third embodiment of the present invention;
Side sectional view when the second rotating shaft is not rotated and separated from the first rotating shaft

FIG. 7 is a sectional side view of the clutch device according to the third embodiment when the rotation power of the first rotation shaft is transmitted to the second rotation shaft;

FIG. 8 is an exploded perspective view of a clutch device according to a third embodiment.

FIG. 9 is a plan view showing a cam operation of a cam mechanism provided in the clutch device according to the third embodiment.

FIG. 10 is an exploded perspective view of a clutch device according to a fourth embodiment of the present invention.

FIG. 11 is a plan view showing a cam operation of a cam mechanism provided in a clutch device according to a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st rotating shaft 1a Annular flange 2 2nd rotating shaft 3 Clutch device 4 Arm (movable body) 5 Fixed cylinder (fixed body) 6 Cam mechanism 8 Cam groove 10 Engagement pin

Claims (5)

[Claims] 1. A rotating body interposed between two rotators arranged coaxially and opposed to each other, and when the rotative power is input to the first rotator, the two rotators are coupled so as to be synchronously rotatable. On the other hand, a clutch device that causes the second rotating body to be in a non-rotating state when rotational power is input to the second rotating body, and is attached to one of the rotating bodies so as to be integrally rotatable and displaceable in and out of the radial direction. A movable body, while the movable body is locked in the circumferential direction immovably when the movable body is displaced radially outward, while the movable body is locked when the movable body is displaced radially inward. A fixed body that allows movement in the circumferential direction, and a movable body that is provided between an end surface of the movable body and the other rotating body, and that displaces the movable body radially in and out with rotation of one of the rotating bodies at a required angle. And a cam mechanism for causing Apparatus. 2. A rotator, which is interposed between the power transmissions of two rotators disposed coaxially and opposed to each other, and when the rotative power is input to the first rotator, the two rotators are coupled so as to be synchronously rotatable. On the other hand, a clutch device that sets the second rotating body in a non-rotating state when rotational power is input to the second rotating body, a forked arm-shaped movable body provided at an inner end portion of one of the rotating bodies, When the movable body is disposed in a fixed state on the outer peripheral side of the inner end portions of these two rotating bodies and locks the movable body in the circumferential direction immovable when the movable body is displaced radially outward, the movable body is A cylindrical fixed body that allows the movable body to move in the circumferential direction when displaced radially inward; and a movable body provided between an end face of the movable body and the other rotating body. And a cam mechanism for elastically displacing radially in and out. Pitch devices. 3. A rotator interposed between power transmissions of two rotators arranged coaxially and opposed to each other, and when rotative power is input to the first rotator, the two rotators are coupled so as to be synchronously rotatable. On the other hand, a clutch device that causes the second rotating body to be in a non-rotating state when rotational power is input to the second rotating body, wherein two movable members provided at the inner end portion of one rotating body so as to be radially displaceable. The movable body is fixedly disposed on the outer peripheral side of the inner end portion of the two rotating bodies, and locks the movable body in the circumferential direction immovable when the movable body is displaced radially outward. A cylindrical fixed body that allows the movable body to move in the circumferential direction when the movable body is displaced radially inward; and a cylindrical fixed body provided between an end face of the movable body and the other rotating body. And a cam mechanism for displacing the movable body in and out of the radial direction. Pitch devices. 4. The clutch device according to claim 1, wherein the lock is formed by a gear structure, an uneven structure, or a friction structure provided on both opposing surfaces of the movable body and the fixed body. Clutch device. 5. The clutch device according to claim 1, wherein the cam mechanism is provided on one of the opposing surfaces of the movable body and the other rotating body, and on the other of the pins. A clutch device comprising a cam groove.