JP3448096B2 - clutch - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch suitable for, for example, an electric antenna for an automobile, and more particularly to an improvement of a clutch element for transmitting the rotational force of a driving side rotating base body to a driven side rotating base body.

[0002]

2. Description of the Related Art Generally, a clutch of this type is a disk-shaped main drive side rotary base body that is rotated by power from a drive source such as a motor, and is arranged concentrically opposite to the main drive side rotary base body. A disk-shaped driven side rotating base body that rotates by receiving a rotational force from the base body and drives the expandable antenna and the like as a load to expand and contract, and is interposed between the driven side rotary base body and the main drive side rotating base body, In the normal state, the rotational force of the driving side rotating base body is frictionally transmitted to the driven side rotating base body, and in the overload state, the driving side rotating base body and the driven side rotating base body are slipped to couple the driving side and the load side. It is composed of a clutch element for releasing.

As the above-mentioned clutch element, concavo-convex portions which engage with each other are arranged along the circumferential direction on the respective opposing surfaces of the main rotating body and the subordinate rotating substrate, and the confronting surfaces are provided with the concavo-convex portions. In the prior art, a structure in which a leaf spring or other springs stored in a compressed state so as to urge both rotary bases so as to be in a pressure contact state has been widely used. It is also known that a ball, a roller, a cam or the like is used as a friction transmitter in order to enhance the friction transmitting force by the uneven portion.

[0004]

The above-mentioned conventional clutch has the following problems. That is, since the frictional transmitters such as the uneven portions or the balls, the rollers, the cams, etc. are directly press-contact engaged with the facing surface of the rotary base body by the leaf springs or other springs, the clutch is disengaged. In the state, that is, when the main driving side rotary base and the driven side rotary base relatively slip and rotate, the concavo-convex portions formed of a relatively hard material or the friction transmitter and the concavo-convex portion are strongly engaged. Since the removal operation is repeated, the impact sound generated at that time becomes a loud noise and the wear is severe. Therefore, it is difficult to maintain the initial performance stably over a long period of time. Further, the main rotating body, the driven rotating body, the leaf spring in the compressed state, the balls,
In order to form a clutch by integrating frictional transmission elements such as rollers and cams, a lot of accessory parts are required and the number of assembling steps is large. For this reason, the structure is complicated and the size is increased, and it is difficult to reduce the manufacturing cost.

An object of the present invention is to provide a clutch as described below. (1) A clutch that produces significantly less noise and wear when the clutch is disengaged, and that provides stable clutch force.

(2) A clutch having the advantage described in (1) above, and further reducing the impact noise when the sliding contact member is engaged with or disengaged from the recess. (3) A clutch that has the advantage described in (1) above, and that suppresses the restoration sound of the entire clutch element due to the restoration of the third elastic body.

[0007]

In order to solve the above problems and achieve the object, the clutch of the present invention is constructed as follows. (1) In the clutch of the present invention, the rotational force of the driving side rotating base body is transmitted to the driven side rotating base body via a clutch element, and the driving side rotating base body faces the driven side rotating base body. Circular recesses (including circular, oval, polygonal recesses, etc.) formed on the surface and V-shaped (including arcuate) along the circumferential direction on the peripheral wall surface of the circular recesses
An engaging concave portion formed of a plurality of concave concave portions, and capable of engaging and slidingly contacting the concave concave portion of the engaging concave portion and slidingly contacting the peripheral wall surface of the circular concave portion. Sliding contact member provided, first and second link members provided so as to pivotally support the sliding contact member at a pivot portion provided between respective one end portions, and these first and second link members Each of the other end portions of the sliding contact member is pivotally supported by the one end portion thereof, and is pivotally supported so as to be concentrically rotatable with the driving side rotation base body and the driven side rotation base body, and in the engagement concave portion of the sliding contact member. Between the first and second rotating members and the driven-side rotating base, the first and second rotating members being mounted so that the rotating angle relatively changes depending on the sliding contact position in Is inserted into the first and second rotation members, and the rotation angle of the first and second rotation members changes relative to each other.
Each of the first and second elastic members mounted so as to store energy and the other end of each of the first and second rotating members are interposed between the first and second elastic members, A third elastic body mounted so as to store energy in accordance with a relative change in the rotation angle of the moving member,
The slidable contact member includes the first and second link members, the first and second rotating members, and the first, second and third elastic members when the elastic body is restored. It is characterized by including a clutch element provided so as to be held at a balance point of a link mechanism composed of a repellent body. (2) The clutch of the present invention is the clutch according to (1) above, in which the sliding contact member is not in contact with the inner surface of the depressed recess when the sliding contact member is engaged in the depressed recess. The first, second, and
The third embodiment is characterized in that the positional relationship between the holding position of the sliding contact member and the inner surface of the depression is set when the third elastic body is restored. (3) The clutch of the present invention is the clutch according to the above (1), wherein the third elastic body is a pair of couplings projectingly provided on a surface of the driven side rotating base body facing the driving side rotary base body. It is characterized in that it is provided so that the energy storing operation is performed in the mutual region of the children in accordance with the relative change in the rotation angle of the first and second rotation members.

[0008]

As a result of taking the above-mentioned means, the following effects occur. (1) In the clutch of the present invention, the sliding contact member is the first
The second and third elastic-repellent bodies are moved and held by the link motion within the displacement range between the stored state and the restored state. The sliding contact member is held at a predetermined balance point of the link mechanism when the first, second, and third resilient members are restored. Therefore, when the clutch is disengaged, the sliding contact member that is sliding along the circumferential wall surface of the circular concave portion of the engaging concave portion along the circumferential direction is engaged in the recessed concave portion in the engaging direction. Is not a radial direction of the rotary base body, but a direction inclined largely in the circumferential direction. As a result, the collision force of the sliding contact member with respect to the inner surface of the depressed recess is significantly reduced. Further, the pressure contact force of the sliding contact member against the peripheral wall surface of the circular recess is inserted between the first and second rotating members and the driven-side rotating base body, and
The first and second repellent bodies that are respectively stored with the relative change of the rotation angle of the second rotation member and the other end portions of the first and second rotation members. It is secured by a third elastic body which is interposed between the third and the second rotating members and stores energy in accordance with a relative change in the rotating angle of the first and second rotating members. Therefore, the pressure contact force is sufficiently large and stable. (2) In the clutch of the present invention, since the sliding contact member is set to be engageable with the inner surface of the recessed recess without contacting the inner surface of the recessed recess, at least the sliding member is disposed within the recessed recess. The sliding contact member does not directly collide with the inner surface of the recessed portion at the time of engaging with. (3) In the clutch of the present invention, when the third elastic body is restored from the compressed state to the initial state, both ends of the third elastic body collide with the pair of connectors provided on the driven-side rotary base body and expand at that position. The operation can be stopped. Therefore, the restoring force of the first and second rotating members that return with the restoration of the third elastic body is weakened. Therefore, it is possible to prevent the first and second rotating members from violently colliding with the pair of connectors, and the sliding contact member connected to the first and second rotating members via the link member is depressed. It is possible to surely avoid a situation in which the inner surface of the recess strongly collides.

[0009]

1 to 3 are views showing the structure of a clutch according to a first embodiment in which the present invention is applied to a clutch for an electric antenna for an automobile, FIG. 1 is a longitudinal sectional view, and FIG. FIG. 4 is a view showing the main part of FIG. 1 viewed from the direction of line AA, and FIG.
Is a drive-side rotating base 10 and a clutch element 30 (sliding member,
First and second link members, fan-shaped rotating member, first to third
3 is a view showing a positional relationship between the driven rotating body 20 and the elastic body and the like), and FIG.

As shown in FIGS. 1 to 3, this clutch is provided with power from a motor (not shown), which is a drive source, via a two-step reduction gear 1 and a main rotating body 10 on the driving side. , Which is concentrically opposed to the main driving side rotating base body 10 with a predetermined distance, and receives the rotational force from the main driving side rotating base body 10 to rotate and drive a telescopic antenna element (not shown) as a load. The driven-side rotating base body 20 is interposed between the driven-side rotating base body 20 and the driving-side rotating base body 10, and the rotational force of the driving-side rotating base body 10 is applied to the driven-side rotating base body 2.
And a clutch element 30 that transmits to zero. In FIG. 1, reference numeral 2 is a wall of a drive mechanism casing of an electric antenna for an automobile, 3 is a main shaft, and 4 is a rotary drum for accommodating a rope with a rack for expanding and contracting an antenna element.

A disk-shaped main body side rotary base 10 is rotatably fitted on the main shaft 3, and a gear portion 11 meshing with the two-stage reduction gear 1 is provided on the outer peripheral surface thereof. A cylindrical portion 12 is provided on the outer peripheral portion of the facing surface of the driving-side rotary base body 10 that faces the driven-side rotary base body 20.

A driven rotary body 20 in the form of a disk is also rotatably fitted to the main shaft 3 and has a gear portion on its outer peripheral surface which meshes with a rack portion of a rope with a rack for extending and retracting an antenna element (not shown). 21 is provided.
A cylindrical portion 22 is provided on the outer peripheral portion of the facing surface of the driven-side rotary base body 20 that faces the drive-side rotary base body 10. In addition, an arcuate guide protrusion 23 is formed concentrically with the shaft center on the opposing surface of the driven-side rotary base 20 facing the main-side rotary base 10, and the guide protrusions 23 are arranged at symmetrical positions. , Connectors 24, 25 for establishing a connection with the driving side rotary base body 10 via a clutch element 30 described later.
Are formed. Protrusions 24a and 25a are provided on one side surface of each of the connectors 24 and 25, respectively.

The clutch element 30 is constructed as follows. An engagement recess 33 including a circular recess 31 and a recess 32 is formed on a surface of the driving-side rotary base 10 facing the driven-side rotary base 20. The depressions 32 have a form in which they are continuously connected to the peripheral wall surface of the circular depression 31 and are depressed in a V shape along the circumferential direction, and a plurality (two in this embodiment) are provided. There is.

The sliding contact member 34 composed of a rotating roller can be engaged / slidingly contacted with the recessed recess 32 of the engaging recess 33, and can be slidably contacted with the peripheral wall surface of the circular recess 31. It is provided as follows. The sliding contact member 34 is pivotally supported via a pin 37 on a pivot portion provided between the respective one end portions of the first and second link members 35, 36. The other end of each of the first and second link members 35, 36 has a pin 3
8 and 39, and the elastic-repellent body accommodation grooves 41a and 41 on the front surface side.
b and 42a, 42b, each of which is pivotally supported at one end of each of substantially fan-shaped first and second rotating members 41, 42. The first and second rotating members 41 and 42 are rotatably supported by the main shaft 3 so as to be concentrically rotatable with the main drive side rotary base body 10 and the driven side rotary base body 20.

The turning angles of the first and second turning members 41 and 42 can be relatively changed according to the sliding contact position of the sliding contact member 34 inside the engagement recess 33. It is installed like this. On one side surface of the first and second rotating members 41, 42 (that is, a surface facing the driven-side rotary base body 20), the elastic-repellent body accommodation groove curved so as to draw an arc along the circumferential direction, respectively. 41a, 41b and 42a, 42b are provided.

A partition wall 41c having a slit S in the central portion is provided between the elastic-repellent body accommodation grooves 41a and 41b. Similarly, a partition wall 42c having a slit S in the center is provided between the elastic-repellent body accommodating grooves 42a and 42b.

Of these elastic-repellent body accommodation grooves 41a, 41b and 42a, 42b, the elastic-repellent body accommodation grooves 41a and 4b.
2a includes, for example, a first and a first elastic rubber block.
The second repellent bodies 51 and 52 are housed. A third elastic body 53, which is also made of a rubber elastic body block, is fitted into the elastic body housing grooves 41b and 42b only at both end portions thereof except the central portion.

When the first rotating body 10 and the driven rotating body 20 are joined to the space formed in the elastic body housing groove 41a in the state where the first elastic body 51 is housed, the driven side is formed. The connector 24 of the rotary base 20 is inserted with the protrusion 24a facing the slit S of the partition wall 41c. Similarly, when the driving-side rotating base 10 and the driven-side rotating base 20 are joined to the space formed in the elastic-repellent-body receiving groove 42a in the state where the second elastic-repellent body 52 is accommodated, the driven-side rotary substrate is joined. The connector 25 of 20 is the protrusion 25a.
Is inserted in a state of facing the slit S of the partition wall 42c.

The first repellent body 51 comprises a first rotating member 41.
Is inserted between the end wall body 41d of the elastic / repellent body receiving groove 41a and the connector 24 of the driven-side rotary base body 20, and the second elastic / repellent body 52 is the elastic body of the second rotating member 42. Since it is inserted between the end wall 42d of the repellent body housing groove 42a and the connector 25 of the driven-side rotary base 20, the first and second repellent bodies 51 and 52 are the first and second repellent bodies. With the relative change in the rotation angle of the rotation members 41 and 42, energy is stored by compression or expansion in relation to the connectors 24 and 25, respectively.

Since the third elastic body 53 is inserted between the other end portions of the first and second rotating members 41, 42, the third elastic body 53 is the first elastic body 53. , Second rotating members 41, 4
With the relative change of the rotation angle of No. 2, the energy is stored by compression or extension in relation to each of the other ends.

Thus, in the stationary state, the sliding contact member 34 has the first and second link members 35 and 36, and the first and second link members 35 and 36.
The second rotating members 41, 42 and the first and second elastic members 5
It is provided so as to be held at the balance point of the link mechanism composed of the first and the second elastic members 53.

In this embodiment, when the sliding contact member 34 is engaged in the recessed concave portion 32, the sliding contact member 34 is different from the inner surface of the recessed concave portion 32 as shown in FIG. As it can be engaged in the depressed recess 32 in a contact state,
The positional relationship between the holding position of the sliding contact member 34 and the inner surface of the recessed concave portion 32 when the first, second, and third elastic-repellent bodies 51 to 53 are restored is set.

Next, the operation of the clutch of this embodiment constructed as described above will be described with reference to FIGS. 4 and 5 as appropriate. During the antenna extension operation, when the motor (not shown) rotates in the forward direction, the two-stage reduction gear 1
The drive-side rotary base body 10 rotates forward in the direction of arrow M in FIG. Then, the sliding contact member 34, the first and second link members 35, 36, etc. of the clutch element 30 relatively rotate in the direction of arrow N. That is, as shown in FIG. 4, the sliding contact member 34 comes into contact with the point P1 on the peripheral wall surface of the depression 32. As a result, the first and second link members 35 and 36, the first and second rotating members 41 and 42, the first and second resilient members 51 and 52, and the third resilient member 53. The link mechanism consisting of etc. deforms. Due to the relative change in the rotation angle of the first and second rotating members 41 and 42 due to this deformation operation, the first and second elastic bodies 51 and 52 and the third elastic body 53 will eventually A small amount of compression energy is stored.

The repulsive force of the first and second repellent bodies 51 and 52 and the third repellent body 53 due to the compression accumulation works as a locking force at the point P1. Therefore, the driving-side rotating base 10
The rotational force of the depressions 32 to the sliding contact member 34 to the first and second
Link members 35, 36 to first and second rotating members 41,
42-first and second elastic-repellent bodies 51, 52-connectors 24, 2
5, and is transmitted to the driven-side rotary base body 20 via 5, etc. Therefore, the driven rotary base 20 rotates in the same direction as the main rotary base 10 (in the direction of arrow M), and the telescopic antenna element (not shown) is extended.

When the extendable antenna element reaches the extension limit and stops its extension operation, the driven side rotating base body 20 stops rotating and assumes a locked state. On the other hand, the driving-side rotary base body 10 continues to rotate as it is due to the power of the motor. When the relative rotational force between the rotary bases 10 and 20 in such a situation exceeds the locking force at the point P1, the sliding contact member 34 causes the recessed concave portion 32 in the engaging concave portion 33 as shown in FIG.
Point P2 on the peripheral wall surface of the circular concave portion 31 by deviating from the point P1
And continues to slide along the peripheral wall surface of the circular recess 31.

At this time, the link mechanism further strengthens the deforming action as compared with the above-mentioned state, and the first to third resilient bodies 51 to 5 are formed.
3 is further compressed. The sliding contact member 34, which is sliding on the circumferential wall surface of the circular recess 31 along the circumferential direction, is once engaged in the recessed recess 32 every half turn of the engagement recess 33, and then the recessed part 32 is continuously recessed. It separates from the recess 32 and slides on the peripheral wall surface of the circular recess 31.

When the sliding contact member 34 is engaged in the depression 32, the first elastic body 51 to the third elastic body 53 are restored from the compressed state to the initial state, and are rotated by the restoring force. Members 41, 4
The second grade returns to its original position. When the third repellent body 53 is restored from the compressed state to the initial state, both ends thereof abut on the ridge portions 24a, 25a of the pair of connectors 24, 25 provided on the driven side rotation base 20, and at that position. The extension operation can be stopped. For this reason, the restoring force of the first and second rotating members 41 and 42 that returns with the restoration of the third elastic body 53 is weakened.

Thereafter, the above operation is repeated. That is, the clutch is disengaged. When the clutch is disengaged in this way, the fact is detected by some detecting means, and immediately after that, a motor control circuit (not shown) operates, the motor power is cut off, and the rotation of the motor is stopped.
For this reason, the rotation of the driving-side rotary base 10 is stopped, and the extension operation of the telescopic antenna element is completed.

When the motor (not shown) rotates in the reverse direction during the antenna reduction operation, the drive side rotary base body 10 reversely rotates in the direction of the arrow N in FIG. 2 via the two-step reduction gear 1 accordingly. Each part operates. The operation of the retractable antenna element at the time of contraction is basically the same, except that the direction such as the rotation direction is opposite to that at the time of extension of the retractable antenna element described above. Therefore, the description of the operation is omitted.

The configuration and operational effects of the above-mentioned embodiment are summarized as follows. (1) In the clutch of the present embodiment, the rotational force of the driving side rotating base body 10 is transferred to the driven side rotating base body 20 via the clutch element 30.
In a clutch adapted to transmit to a drive, a circular concave portion (including a circular shape, an oval shape, a polygonal concave portion, etc.) formed on a surface of the driving side rotation base body 10 facing the driven side rotation base body 20.
An engaging recess 33 including a recess 31 and a plurality of recesses 32 recessed in a V shape (including an arc shape) along the circumferential direction on the peripheral wall surface of the circular recess 31, and the engaging recess 33. 33
And a sliding contact member 34 provided so as to be capable of engaging / sliding contact with the recessed concave portion 32 and sliding contact with the peripheral wall surface of the circular concave portion 31, and the sliding contact member 34 between one end portions thereof. The first and second link members 35 and 36 provided so as to be pivotally supported by the pivotal support portion provided on the above, and the other end portions of these first and second link members 35 and 36 at their respective one end portions. In addition to being pivotally supported, it is pivotally supported so as to be concentrically rotatable with the main drive side rotary base body 10 and the driven side rotary base body 20, and depending on the slide contact position of the slide contact member 34 in the engagement recess 33. The first and the first mounted so that the rotation angle changes relatively.
The second rotating members 41 and 42 are interposed between the first and second rotating members 41 and 42 and the driven-side rotating base body 20, and the first and second rotating members 41 are provided. , 42, the first and second repulsion members 51 and 52 mounted so as to store respective forces, and the first and second rotation members 41, 42. A third bullet inserted between the other ends of 42 and mounted so as to store energy in accordance with a relative change in the rotation angle of the first and second rotation members 41, 42. The sliding contact member 34 includes the repellant body 53, and
Of the first and second link members 35,
36, the first and second rotating members 41 and 42, and the first
It is characterized in that the clutch element 30 is provided so as to be held at the balance point of the link mechanism including the elastic body 51 to the third elastic body 53.

Therefore, in the clutch of this embodiment, the sliding contact member 34 is moved by the link motion within the displacement range of the first elastic body 51 to the third elastic body 53 in the stored state and the restored state. Moved and held. The sliding contact member 34 is held at a predetermined balance point of the link mechanism when the first elastic body 51 to the third elastic body 53 are restored. Therefore, when the sliding contact member 34, which is sliding along the circumferential wall surface of the circular recess 31 in the engaging recess 33 in the disengaged state of the clutch, is engaged in the recess 32, The engagement direction is not the radial direction of the rotary base body but the direction inclined largely in the circumferential direction. As a result, the sliding contact member 34
The collision force with respect to the inner surface of the recessed concave portion 32 is significantly reduced. Further, the pressure contact force of the sliding contact member 34 against the peripheral wall surface of the circular recess 31 causes the first and second rotating members 41 and 4 to rotate.
2 and the driven-side rotary substrate 20 are interposed between the first and second
The first and second repellent bodies 51 and 52 are respectively stored with the relative change in the rotation angle of the second rotation members 41 and 42.
With the relative change of the rotation angle of the first and second rotating members 41 and 42, which are inserted between the other ends of the first and second rotating members 41 and 42. It is secured by the third repellent body 53 which is stored by Therefore, the pressure contact force is sufficiently large and stable. Thus, noise and wear in the disengaged state of the clutch are significantly reduced, and a stable clutch force can be obtained. (2) The clutch according to the present embodiment is the clutch according to the above (1), in which the sliding contact member 34 is engaged with the recessed recess 3 when the sliding contact member 34 is engaged with the recessed recess 32.
The holding position of the sliding contact member 34 at the time of restoration of the first elastic body 51 to the third elastic body 53 and the above-mentioned sliding position of the first elastic body 51 to the third elastic body 53 so that the inner surface of the second elastic body can be engaged with the recessed concave portion 32 in a non-contact state. It is characterized in that the positional relationship with the inner surface of the depression 32 is set.

Therefore, in the clutch of this embodiment, the sliding contact member 34 does not directly collide with the inner surface of the depression 32 at least when the sliding member 34 is engaged in the depression 32. Thus, the impact sound when the sliding contact member 34 is engaged with and disengaged from the depressed recess 32 is further reduced. (3) The clutch of the present embodiment is the clutch described in (1) above, and the third resilient member 53 is the driven-side rotating base member 2.
The relative change of the rotation angle of the first and second rotation members 41 and 42 in the inter-region of the pair of connectors 24 and 25 projectingly provided on the surface facing the driving side rotation base 10 at 0. It is characterized in that it is provided so as to carry out the energy storage operation according to.

Therefore, in the clutch of this embodiment, when the third elastic body 53 is restored from the compressed state to the initial state, both ends of the third elastic body 53 are provided with the pair of couplers 24 and 25 provided on the driven rotary base 20. It hits against the ridges 24a, 25a, and the extension operation is stopped at that position. For this reason, the restoring force of the first and second rotating members 41 and 42 that returns with the restoration of the third elastic body 53 is weakened.
Therefore, it is possible to prevent the first and second rotating members 41 and 42 from colliding violently with the pair of connectors 24 and 25, and the link members 35 and 36 are attached to the first and second rotating members 41 and 42. It is possible to surely avoid the situation in which the sliding contact member 34, which is connected via the contact, strongly collides with the inner surface of the depressed recess 32.
Thus, the restoration sound of the entire clutch element due to the restoration of the third elastic-repellent body 53 is suppressed. (4) The clutch according to the present embodiment is the clutch according to (1) above, in which each of the first and second link members 35 and 36 that holds the sliding contact member 34 between the facing surfaces of the respective one end portions. The other end facing surface of one link member 35 is pivoted to one side surface of the one rotating member 41 so that the first and second rotating members 41, 42 are held from both sides by the facing surface of the other end portion. The other end surface of the other link member 35 is pivotally supported on the other side surface of the other rotating member 42.

Therefore, in the clutch of this embodiment, both surfaces of the first and second rotating members 41 and 42 are
The second link members 35 and 36 are held between the opposite surfaces of the other end portions, and as a result, the first and second link members 3 are held.
Compared to the case where the first and second rotating members 41 and 42 are attached to each other while being superposed on each other, the total of "thickness of rotating member" and "thickness of one link member" The total thickness of the clutch can be reduced accordingly. Since the distance between the sliding contact member 34 and the elastic members 51 to 53 in the direction along the main axis becomes zero, the link members 35 and 36 are formed.
Also, the torsional moment of the rotating members 41, 42 is not generated, and the durability and strength are significantly improved. Thus, it can be made small and lightweight, and it is relatively robust. (5) The clutch according to the present embodiment is the clutch described in (1) above, and includes the first elastic body 51 to the third elastic body 53.
Is made of a rubber elastic block.

Therefore, in the clutch of this embodiment, as compared with, for example, a metal coil spring or the like, it is easy to manufacture, and it is extremely easy to assemble it at a predetermined place, and it is rich in mass productivity. Thus, the manufacturing is easy, the assembling workability is excellent, and the cost can be reduced. (6) The clutch of this embodiment includes the following modifications.

Applied to actuators for automobile door locks, etc. At least a part of the first, second, and third elastic bodies is formed of, for example, a metal coil spring, a pneumatic spring, or another elastic body.

[0037]

According to the present invention, the following clutch can be provided. (1) A clutch that produces significantly less noise and wear when the clutch is disengaged, and that provides stable clutch force.

(2) A clutch which has the advantage described in (1) above and further reduces the impact noise when the sliding contact member is engaged with or disengaged from the recess. (3) A clutch that has the advantage described in (1) above, and that suppresses the restoration sound of the entire clutch element due to the restoration of the third elastic body.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the structure of a clutch according to an embodiment of the present invention.

FIG. 2 is a view showing a relationship among a main driving side rotating base body, a clutch element and a driven side rotating base body of the clutch according to the above embodiment, and is a view of FIG. 1 seen from a line AA direction.

FIG. 3 is a plan view showing the clutch according to the above embodiment divided into two parts, a main driving side rotating base and a driven side rotating base.

FIG. 4 is a view for explaining the operation and action of the clutch according to the above embodiment.

FIG. 5 is a view for explaining the operation and action of the clutch according to the above embodiment.

[Explanation of symbols]

Reference numeral 10 ... Driving side rotating base body 20 ... Driven side rotating base body 24, 25 ... Coupler 30 ... Clutch element 31 ... Circular recess 32 ... Recessed recess 33 ... Engagement recess 34 ... Sliding contact member 35, 36 ... First,
Second link members 41, 42 ... Substantially fan-shaped first and second rotating members 51 to 53 ... First to third resilient members

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-5-231449 (JP, A) JP-A-4-151022 (JP, A) Actually open 7-19265 (JP, U) Actually open Sho-59- 136036 (JP, U) Actual opening Sho 58-108629 (JP, U) Actual opening Sho 48-79945 (JP, U) Actual public Sho 53-48935 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16D 11/00-23/14 F16D 41/00-47/06 F16D 7/06-7/10

Claims (3)

(57) [Claims] 1. A clutch in which the rotational force of a driving-side rotating base is transmitted to a driven-side rotating base through a clutch element, the clutch being formed on a surface of the driving-side rotating base facing the driven-side rotating base. Engaging recess including a circular recess and a plurality of recesses that are recessed in a V shape along the circumferential direction on the peripheral wall surface of the circular recess, and the engaging recess with respect to the recess. A sliding contact member provided so as to be able to enter and slide, and slidably contact the peripheral wall surface of the circular concave portion, and the sliding contact member is pivotally supported by a pivot portion provided between each one end. The provided first and second link members, and the other end portions of these first and second link members are pivotally supported at their one end portions, and the main drive side rotation base body and the driven side rotation base body are provided. The slide contact member is rotatably supported so as to be concentrically rotatable. The first and the first parts mounted so that the rotation angle relatively changes according to the sliding contact position in the fitting recess.
A second rotating member, which is interposed between the first and second rotating members and the driven-side rotating base body, and is configured to provide relative rotation angles of the first and second rotating members. According to the change, the first and second repellent bodies mounted so as to store energy respectively and the other end portions of the first and second rotating members are interposed between A third resilient member mounted so as to store energy according to a relative change in the rotation angle of the second rotating member, and the sliding contact member restores the resilient member. At the time, it is held at the balance point of the link mechanism including the first and second link members, the first and second rotating members, and the first, second, and third elastic members. A clutch comprising a clutch element provided. 2. When the sliding contact member is engaged in the depression, the sliding contact member can be engaged in the depression without contacting the inner surface of the depression. , Second,
The clutch according to claim 1, wherein a positional relationship between a holding position of the sliding contact member and an inner surface of the recessed recess is set when the third elastic body is restored. 3. A third elastic body is a first rotating member and a second rotating member in an inter-region of a pair of connectors projectingly provided on a surface of the driven side rotating base body facing the driving side rotary base body. The clutch according to claim 1, wherein the clutch is provided so as to perform a power storing operation in accordance with a relative change in the rotation angle of the clutch.