JP2002266902A - Reverse input preventing clutch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reverse input preventing clutch that has a function for transmitting input torque from an input side to an output side and locking revere input torque from the output side to prevent it from backing up to the input side, and is compact, light and inexpensive. SOLUTION: The reverse input preventing clutch comprises, as principal elements, an input side member 1, an output side member 2, a rotationally restrained stationary side member 3, a locking means, an unlocking means and a torque transmitting means. The input side member 1, the output side member 2, the stationary side member 3 and a fixed side plate 4 are a pressed product of a metal plate such as a steel plate. Reverse input torque on the output side member 2 and the like is locked on the stationary side member 3 in both normal and reverse rotation directions by rollers 6 as the locking means. Input torque in both normal and reverse rotation directions from the input side member 1 is transmitted to the output side member 2 via holes 1d and projections 2d as the torque transmitting means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reverse input prevention clutch having a function of transmitting an input torque from an input side to an output side while locking a reverse input torque from the output side so as not to return to the input side.

[Detailed Description of the Invention]

[0003]

2. Description of the Related Art For example, in a device that transmits an input torque from a drive source to an output side mechanism and performs a required operation, a function of holding the output side mechanism so that the position of the output side mechanism does not change when the drive source is stopped is required. May be Taking an electric shutter as an example, in this device, a forward or reverse input torque from a drive motor is input to an opening / closing mechanism on the output side to open / close the shutter. When the drive source is stopped due to (power failure, etc.), if the reverse input torque is returned to the input side due to the lowering of the weight of the shutter, the input side device may be damaged. Therefore, a mechanism having a function of holding the position of the shutter and preventing the reverse input torque from the shutter from returning to the input side is required.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a compact, lightweight, and low-cost reverse input prevention clutch having the functions described above.

[0005]

In order to solve the above-mentioned problems, the present invention provides an input member to which a torque is input, an output member to which a torque is output, a stationary member to which rotation is restricted, and A locking means provided between the stationary side member and the output side member for locking the output side member and the stationary side member against a reverse input torque from the output side member; and an input side member provided on the input side member. A lock release means for releasing a lock state by a lock means with respect to an input torque from the input side member, and an input side member provided between the input side member and the output side member when the lock state by the lock means is released. A torque transmitting means for transmitting an input torque from the member to an output-side member, wherein the input-side member, the output-side member, and the stationary-side member are each formed as a plastically processed metal plate.

[0006] The "lock means" here includes a wedge engaging force,
Includes those that apply rotation restraining force by uneven engagement force, friction force, magnetic force, electromagnetic force, fluid pressure, fluid viscous resistance force, fine particle medium, etc., but simplification of structure and control mechanism, smooth operation, cost It is preferable to apply a rotation restraining force by a wedge engaging force from the surface or the like. Specifically, a wedge gap is formed between the output side member and the stationary side member, and the locking / idling is switched by engaging and disengaging the wedge with the wedge gap. good. In this configuration, a cam surface for forming a wedge gap is provided on the output-side member or the stationary-side member (an engaging element having a circular cross section such as a roller or a ball is used), and a wedge gap is formed. (A sprag or the like is used as the engaging element).

[0007] The "metal plate" is not particularly limited as long as it can be formed into required dimensions and shapes by plastic working, and the material is not particularly limited. For example, a steel plate can be used. Further, as the “plastic working”, for example, press working can be adopted.

In the above configuration, when the input torque is input to the input member, first, the locked state by the lock means is released by the lock release means, and in this state, the input torque from the input member is transmitted to the torque transmission means. The power is transmitted to the output side member via the output side. On the other hand, the reverse input torque from the output side member is locked between the output side member and the stationary side member via the locking means. Therefore, a function is obtained in which the input torque from the input side is transmitted to the output side, and the reverse input torque from the output side is not returned to the input side. In addition, by forming the input side member, the output side member, and the stationary side member as plastic processed products of a metal plate, respectively, compared to the case of forming a forged product, a cast product, and a machined product, the size, weight, and cost are reduced. Price can be increased.

In the above configuration, a connecting portion for connecting the input shaft to the input member can be provided, and the connecting portion can be located inside the clutch. Thereby, the axial dimension of the clutch itself can be made compact, and the overall axial dimension when assembled with the drive source can be made compact. The connecting portion is preferably provided on a cylindrical portion extending continuously from the inner peripheral side of the input-side member toward the inside of the clutch, and is provided with at least one flat portion that fits in a plane with the input shaft. When the flat portion provided on the input shaft and the flat portion of the connecting portion are flatly fitted, the input shaft and the input-side member are connected to each other such that they cannot rotate relative to each other.

Further, in the above configuration, a cylindrical output shaft portion can be provided integrally with the output side member. As a result, the weight of the output shaft can be reduced, the number of parts can be reduced, and the cost can be reduced. This output shaft portion is preferably in a form in which one end thereof has a bottom. Thereby, the strength against the radial load and the torsional torque of the output shaft portion can be increased, the deformation can be prevented, and the durability can be improved. Preferably, the output shaft portion is provided with at least one flat portion that is flatly fitted with another rotary member (a rotary member of a mechanism or a device connected to the output side). When the flat portion provided on the other rotating member and the flat portion of the output shaft portion are fitted in a plane, the output shaft portion and the other rotating member are connected to each other so that they cannot rotate relative to each other. Alternatively, the output shaft may be provided with a spline or serration that is splined or serrated with another rotating member (a rotating member of a mechanism or device connected to the output side).

In the above structure, the locking means is a cam surface provided on the stationary side member and a cam surface provided on the output side member and forming a wedge gap between the circumferential surface and the circumferential surface in both forward and reverse rotation directions. And a pair of engagement members interposed between the cam surface and the circumferential surface,
An elastic member for pressing each of the pair of engagement members in the direction of the wedge gap, wherein the unlocking means selectively engages with any one of the pair of engagement members, and adjusts this to the direction of the wedge gap. An engagement element for pressing in the opposite direction, wherein the torque transmitting means is:
A rotation direction engagement element provided on the input side member and the output side member, and a rotation direction between the engagement element of the lock release means and the engagement element at a neutral position of the lock release means and the torque transmission means. The gap δ1 and the gap δ2 in the rotational direction between the engagement elements of the torque transmitting means may have a relationship of δ1 <δ2.

In the above configuration, when a reverse input torque in one direction is input to the output side member, one of the pair of engagement members is wedge-engaged with the wedge gap in that direction, and the output side member is moved to the stationary side member. When a reverse input torque in the other direction is input to the output side member, the other of the pair of engagement members engages with the wedge gap in that direction to stop the output side member. Lock in the other direction to the side member. Therefore, the output side member is locked in the forward and reverse rotation directions with respect to the stationary side member via the pair of engagement members. On the other hand, when the input torque is input to the input-side member, first, the engagement element serving as the unlocking means provided on the input-side member has a wedge gap and a wedge engagement in the direction of the input torque among the pair of engagement elements. The mating engaging element is pressed in a direction opposite to the direction of the wedge gap to be disengaged from the wedge gap. Thereby, the locked state of the output side member is released in the direction of the input torque. Next, in a state where the locked state of the output-side member is released, the engagement elements in the rotation direction as torque transmission means provided on the input-side member and the output-side member engage with each other. Thus, the input torque input to the input side member is transmitted through the path of the input side member → torque transmitting means (engaging element in the rotating direction) → the output side member, and the output side member rotates.

At the neutral position of the unlocking means and the torque transmitting means, a rotational gap δ1 between the engaging element of the unlocking means and the engaging element and a rotational gap δ2 between the engaging elements of the torque transmitting means are defined. , Δ1 <δ2, the lock release by the lock release unit and the torque transmission by the torque transmission unit can be sequentially and reliably performed.

In the above configuration, the torque transmitting means may be constituted by a convex portion provided on one of the input side member and the output side member, and a concave portion provided on the other side and adapted to the convex portion. Specifically, a projection as a projection can be provided on the output-side member, and a notch or hole as a depression can be provided on the input-side member. In that case, the protrusion can be made to protrude in the outer radial direction or in the axial direction. Incidentally, the cam surface may be formed directly on the output side member,
A member having a cam surface may be mounted on the output side member. Preferably, a roller is used as the engagement element.

In the above configuration, the elastic member includes a base,
A tongue piece extending in one axial direction from the base, wherein the tongue piece is interposed between the pair of engaging elements and configured to press the pair of engaging elements in a direction separating from each other. Preferably, the elastic member is formed as an integral ring, that is, the base has a ring shape and a plurality of tongue pieces are arranged in the circumferential direction, so that the number of parts can be reduced and the cost can be reduced. .

In the above configuration, the fixed side plate can be fixed to the stationary side member, and the fixed side plate can be a plastically processed metal plate. In this case, a bearing portion for supporting the input shaft in the radial direction can be provided integrally with the fixed side plate. This makes it possible to smoothly and stably rotate the input shaft and the input-side member, and to prevent or suppress an improper load from being applied to the locking means, thereby performing a stable clutch operation. Note that this bearing portion can be configured by disposing a separate rolling bearing or slide bearing. However, by adopting the above configuration, the structure can be simplified and the number of parts can be reduced. This bearing portion is preferably provided in a tubular portion extending continuously from the inner peripheral side of the fixed side plate in the clutch inner direction.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show the entire structure of a reverse input prevention clutch according to a first embodiment of the present invention. The clutch according to this embodiment includes an input-side member 1 to which torque is input, an output-side member 2 to which torque is output, a stationary-side member 3 whose rotation is restricted, and a fixed side plate fixed to the stationary-side member 3. 4 and a lock unit, a lock release unit, and a torque transmission unit, which will be described later, are configured as main elements. The input-side member 1, the output-side member 2, the stationary-side member 3, and the fixed-side plate 4 are a metal plate, for example, a pressed product of a steel plate (a member formed by pressing).

As shown in FIGS. 1 and 3, the input side member 1
A flange portion 1a extending in a radial direction;
and a plurality of (for example, eight) columns extending continuously in one axial direction from the outer periphery of the flange portion 1a, and a cylindrical portion 1b extending continuously in one axial direction (in the clutch internal direction) from the inner periphery of the cylindrical member 1a. It is mainly composed of a portion 1c and a plurality (for example, eight) of holes 1d formed through the flange portion 1a.

The pillars 1c and the holes 1d are arranged at equal circumferential intervals. The position of the pillar 1c and the position of the hole 1d are mutually shifted in the circumferential direction. In this example, the hole 1d is located at an intermediate position between the circumferentially adjacent pillars 1c.
The space between the column portions 1c that are adjacent in the circumferential direction constitutes pockets 1e that are open toward one side in the axial direction, and a pair of rollers 6 described later is arranged in each pocket 1e.

The tubular portion 1b is located inside the clutch, and its tip portion is slightly reduced in diameter to form a connecting portion 1f. In this embodiment, the inner periphery of the connecting portion 1f has a polygonal shape, for example, a rectangular shape {FIG. 1 (b)}, and four plane portions 1f1 are formed by each side of the rectangular shape. A connecting part of an input shaft (not shown) (a motor, an output shaft of a motor with a speed reducer, etc.) is connected to the connecting part 1f. The outer periphery of the connecting portion of the input shaft has a polygonal shape, for example, a square shape corresponding to the inner periphery of the connecting portion 1f, and four plane portions are formed by each side of the square. Then, the input shaft and the input-side member 1 are connected to each other so that the input shaft and the input-side member 1 cannot rotate relative to each other by the respective flat portions formed on the connecting portion of the input shaft and the respective flat portions 1f1 of the connecting portion 1f being flatly fitted. In addition, the connecting portion 1f may have a polygonal shape, for example, a square shape, as a whole, in addition to the inner periphery thereof, in its thick portion.
Further, a structure may be employed in which the connecting portion of the input shaft and the connecting portion 1f are fitted to each other by one flat portion or two flat portions formed at 180 ° opposing positions.

The output side member 2 includes a flange portion 2a extending in a radial direction, a cylindrical output shaft portion 2b extending continuously from the inner periphery of the flange portion 2a in one axial direction, and a flange portion 2a.
Large diameter portion 2c extending continuously from the outer periphery of
And a plurality (for example, eight) of projections 2d axially projecting from one end of the large diameter portion 2c.

For example, one flat portion 2b1 is provided at the shaft end portion of the output shaft portion 2b, and this shaft end portion is connected to a rotating member of a not-shown output side mechanism or device. Then, the flat portion 2b1 of the shaft end portion and the flat portion formed on the rotating member are flatly fitted, so that the output shaft portion 2b
And the rotating member are connected to each other so as not to rotate relatively. 2
The two flat portions 2b1 may be formed at 180 ° opposite positions, or the shaft end portion may be formed in a polygonal shape, and the shaft end portion and the rotating member may be fitted in a plane by a plurality of flat portions. In addition, the shaft end of the output shaft portion 2b has a bottom with a bottom portion 2b2.

The large diameter portion 2c has a polygonal shape, for example, a regular octagonal shape, and the outer periphery of each side is a cam surface 2c1. Therefore, eight cam surfaces 2c1 are provided on the outer periphery of the large diameter portion 2c.
Are arranged at equal circumferential intervals.

As shown in an enlarged manner in FIG.
Each of the projections 2d is provided with a corresponding one of the holes 1 of the input-side member 1.
d is inserted with a rotational gap (a rotational gap δ2 shown in FIG. 9). In addition, as shown in FIG. 5, burring may be performed on each hole 1d to form the overlay 1d1. As a result, the protrusion 2d and the hole 1d can be reliably engaged in the rotational direction.

The stationary member 3 includes a flange 3a extending in the radial direction, a cylindrical portion 3b extending continuously in one axial direction from the inner periphery of the flange 3a, and an axial direction extending from the outer periphery of the flange 3a. A large diameter portion 3c extending to the other end of the first portion and a flange portion 3d projecting from one end of the large diameter portion 3c in the outer diameter direction are mainly constituted.

The flange portion 3a is mounted on the outer surface of the flange portion 2a of the output-side member 2, and the cylindrical portion 3b supports the outer periphery of the output shaft portion 2b of the output-side member 2 so as to be rotatable in the radial direction. (Sliding bearing).

On the inner periphery of the large diameter portion 3c, there is provided a circumferential surface 3c1 which radially opposes the cam surface 2c1 of the output side member 2 and forms a wedge gap in both forward and reverse rotation directions.

A plurality of (for example, four) rectangular notches 3d1 and a plurality (for example, four) arc-shaped notches 3d2 are formed in the flange 3d at equal circumferential intervals. The notch 3d1 is compatible with a crimping portion 4c of the fixed side plate 4 described later. The notch 3d2 is the bracket 4b of the fixed side plate 4.
It is provided in order to avoid interference with the mounting bolts mounted on the.

As shown in FIGS. 1 and 2, the fixed side plate 4
A flange portion 4a extending in the radial direction;
a (for example, four) bracket portions 4b protruding in the outer diameter direction from the outer periphery of a, a plurality (for example, four) caulking portions 4c protruding in the axial direction from the outer periphery of the flange portion 4a,
A cylindrical portion 4d continuously extending from the inner periphery of the flange portion 4a in one axial direction (inside the clutch) is mainly constituted.

The flange 4a is mounted on the outer surface of the flange 1a of the input member 1. 4 brackets 4
b are formed at equal circumferential intervals, and a through hole 4b1 is formed in each of them. A mounting bolt (not shown) is inserted into the through hole 4b1.

The four caulking portions 4c are formed at equal circumferential intervals, and each have a pair of claws 4c1 divided into two branches (see FIG. 2). The caulking portion 4c is fitted into the notch 3d1 of the stationary member 3, and the pair of claws 4c1 are folded back in opposite directions in the circumferential direction, and caulked to the flange 3d of the stationary member 3. As a result, the stationary side member 3 and the fixed side plate 4 are coupled so as to be relatively immovable in the axial and rotational directions.

The cylindrical portion 4d is a cylindrical portion 1b of the input side member 1.
Bearing (sliding bearing) that is inserted into the inner peripheral side of the shaft and supports the outer periphery of the input shaft (not shown) so as to be rotatable in the radial direction.
Becomes

As shown in FIG. 2, between each cam surface 2c1 of the output-side member 2 and the circumferential surface 3c1 of the stationary-side member 3, a pair (for example, eight pairs) of rollers Are arranged in a pocket 1 e formed between the pillars 1 c of the input side member 1. A tongue piece 7b of an elastic member 7 described below is interposed between the pair of rollers 6, and presses the pair of rollers 6 in a direction away from each other. Cam surface 2c1, circumferential surface 3
c1, a pair of rollers 6, and a tongue piece 7b of the elastic member 7
The lock means is constituted by the input side member 1. The lock release means is constituted by the pillar portions 1 c (engaging elements) of the input side member 1 located on both circumferential sides of the pair of rollers 6.
Hole 1d and the projection 2 of the output side member 2 inserted into the hole 1d
d constitutes a torque transmitting means. Note that, for example, grease is sealed in a space between the outer periphery of the output-side member 2 and the inner periphery of the stationary-side member 3, particularly, between the cam surface 2c1 and the circumferential surface 3c1.

As shown in FIG. 6, the elastic member 7 is
a, a tongue piece 7b extending from the base 7a to one side in the axial direction
And The elastic member 7 has an integral ring shape, and a plurality of pairs of tongue pieces 7b are arranged at equal circumferential intervals on a ring-shaped base 7a. The elastic member 7 is a pressed product of a metal plate, for example, a spring steel plate.

In this embodiment, the outer periphery of the base 7a has a regular octagonal shape, and a pair of tongues 7b is provided on each side of the outer periphery of the base 7a. A pair of tongue pieces 7b
Is formed in a bent piece shape by cutting and raising each side of the outer periphery of the base 7a, and each of them is connected to the base 7a via the upright portion 7c. As shown in FIG. 6C, the pair of tongue pieces 7b is interposed between the pair of rollers 6, and elastically presses the pair of rollers 6 in a direction separating from each other.

As shown in an enlarged view in FIG. 7, at the neutral position, the pair of rollers 6 are pressed in a direction away from each other by a tongue piece 7b of the elastic member 7, and each of the rollers 6 has a cam surface 2c.
1 and the circumferential surface 3c1 are engaged with wedge gaps formed in both forward and reverse rotation directions. At this time, each column 1c of the input side member 1
And each roller 6 has a gap δ1 in the rotation direction. In addition, between the projection 2d of the output-side member 2 and the hole 1d of the input-side member 1, there are rotational gaps δ2 in both forward and reverse rotational directions. The rotation direction gap δ1 and the rotation direction gap δ2 have a relationship of δ1 <δ2. The size of the rotational gap δ1 is, for example, about 0 to 0.4 mm (0 to 1.5 ° about the axis of the clutch), and the rotational gap δ1
The size of 2 is, for example, about 0.4 to 0.8 mm (1.8 to 3.7 degrees around the axis of the clutch).

In the state shown in FIG. 7, for example, the output side member 2
When the clockwise reverse input torque is input to the counterclockwise direction, the roller 6 in the counterclockwise direction (rearward in the rotation direction) engages with the wedge gap in that direction, and the output side member 2 Locked in direction. When a counterclockwise reverse input torque is input to the output side member 2, the roller 6 in the clockwise direction (rearward in the rotational direction) engages with the wedge gap in that direction, and the output side member 2 is moved to the stationary side member 3. Locked counterclockwise. Therefore, the reverse input torque from the output side member 2 is locked by the roller 6 in both forward and reverse rotation directions.

FIG. 8 shows an initial state in which an input torque (clockwise in the figure) is input to the input side member 1 and the input side member 1 starts rotating clockwise in the figure. Since the rotation direction gap is set to δ1 <δ2, first, the columnar portion 1c of the input side member 1 in the counterclockwise direction (rearward in the rotational direction) is engaged with the roller 6 in that direction (rearward in the rotational direction). This is pressed clockwise (rotationally forward) against the elastic force of the tongue piece 7b. Thereby, the roller 6 in the counterclockwise direction (rearward in the rotational direction) is separated from the wedge gap in that direction, and the locked state of the output side member 2 is released. , Does not engage with the wedge gap in that direction. ｝. Therefore, the output side member 2 can be rotated clockwise.

When the input side member 1 is further rotated clockwise, as shown in FIG. 9, the wall surface of the hole 1d of the input side member 1 is engaged with the projection 2d of the output side member 2 in a clockwise direction. Thereby, the clockwise input torque from the input side member 1 is transmitted to the output side member 2 via the engagement portion between the hole 1d and the projection 2d, and the output side member 2 rotates clockwise. When the input torque in the counterclockwise direction is input to the input side member 1, the output side member 2 rotates counterclockwise by the reverse operation. Therefore, the input torque in the forward and reverse rotation directions from the input member 1 is transmitted to the output member 2 via the hole 1d and the projection 2d as a torque transmitting means, and the output member 2 rotates in both forward and reverse directions. Rotate in the direction. When the input torque from the input side member 1 is lost, the tongue piece 7b returns to the neutral position shown in FIG. 7 by the elastic restoring force.

FIGS. 10 to 12 show a second embodiment of the present invention. This second embodiment is similar to the first embodiment described above.
This embodiment differs from the first embodiment in that an engagement structure between a notch 21d and a projection 22d in the outer diameter direction is employed as the torque transmitting means. As shown in FIG.
1 d is formed on the outer peripheral side portion of the flange portion 1 a of the input side member 1. A plurality of (for example, eight) notches 21d are formed and arranged at equal circumferential intervals. Base 1c1 of pillar 1c
Is slightly wider in the circumferential direction, and the notch 21d is located between the base ends 1c1 adjacent in the circumferential direction. The protruding portion 22d in the outer diameter direction is continuous with one end of the large diameter portion 2c of the output side member 2 via the base end 22d1 in the axial direction.
A plurality (for example, eight) of the protrusions 22d are formed, and are arranged at equal circumferential intervals. Each projection 22d of the output side member 2 is adapted to each notch 21d with a rotational gap δ2 (see FIG. 7).

It should be noted that the input side member 1 may be provided with a notch 21d 'in the form shown in FIG. 13 instead of the notch 21d. According to this example, compared to the embodiment shown in FIG.
Since it is not necessary to cut out the flange portion 1a of the input-side member 1, the manufacturing process is simplified. Further, as a torque transmitting means, a notch provided on the input member 1 and an axial protrusion provided on the output member 2 are formed by a rotational gap δ2.
(See FIG. 7). Other items are the same as those in the first embodiment, and a duplicate description will be omitted.

[0043]

According to the present invention, the input torque from the input side is transmitted to the output side, while the reverse input torque from the output side is locked so as not to return to the input side, and
A compact, lightweight, and low-cost reverse input prevention clutch can be provided.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a reverse input prevention clutch according to a first embodiment {FIG. 1 (a): BB sectional view of FIG. 2}, a transverse sectional view of a connecting portion {FIG. 1 (b)}, FIG. 1C is a view in the X direction of the output shaft portion {FIG. 1C}.

FIG. 2 is a cross-sectional view showing a reverse input prevention clutch according to the first embodiment {cross-sectional view taken along the line AA in FIG. 1A}.

FIG. 3 is a perspective view of an input-side member, an output-side member, and a stationary-side member.

FIG. 4 is an enlarged longitudinal sectional view showing a peripheral portion of a torque transmitting means (a cut-out portion of an input-side member and a protrusion of an output-side member).

FIG. 5 is an enlarged longitudinal sectional view showing a peripheral portion of a torque transmission unit (a cut-out portion of an input-side member and a projection of an output-side member) according to another example.

FIG. 6 is a front view showing the elastic member {FIG. 6 (a)}, a view seen from the outer peripheral side {FIG. 6 (b)}, and an enlarged view showing a state where a tongue piece is interposed between a pair of rollers. FIG. 6C｝.

FIG. 7 is a partially enlarged cross-sectional view for explaining the operation of the reverse input prevention clutch according to the first embodiment (neutral position).

FIG. 8 is a partially enlarged cross-sectional view illustrating the operation of the reverse input prevention clutch according to the first embodiment (at the time of unlocking).

FIG. 9 is a partially enlarged cross-sectional view for explaining the operation of the reverse input prevention clutch according to the first embodiment (during torque transmission).

FIG. 10 is a longitudinal sectional view of the reverse input prevention clutch according to the second embodiment {FIG. 10 (a): BB sectional view of FIG. 11}, a transverse sectional view of a connecting portion {FIG. 10 (b)}, FIG. 10C is a view of the output shaft portion as viewed in the direction of the arrow X (FIG. 10C).

FIG. 11 is a cross-sectional view showing a reverse input prevention clutch according to a second embodiment {cross-sectional view taken along line AA of FIG. 10 (a)}.

FIG. 12 is a perspective view of an input-side member, an output-side member, and a stationary-side member.

FIG. 13 is a perspective view of an input-side member, an output-side member, and a stationary-side member according to another example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Input side member 2 Output side member 3 Stationary side member 4 Fixed side plate 6 Roller 7 Elastic member

Claims (19)

[Claims] 1. An input side member to which torque is input, an output side member to which torque is output, a stationary side member whose rotation is restricted, and provided between the stationary side member and the output side member. Locking means for locking the output-side member and the stationary-side member against a reverse input torque from the output-side member, provided on the input-side member; A lock release means for releasing a lock state by a lock means, and a lock release means provided between the input side member and the output side member, and when the lock state by the lock means is released, a signal from the input side member is released. A reverse input prevention clutch comprising: a torque transmission unit that transmits an input torque to the output side member, wherein the input side member, the output side member, and the stationary side member are each subjected to plastic working of a metal plate. Reverse input prevention clutch, characterized in that the the. 2. The reverse input prevention clutch according to claim 1, wherein the input side member has a connecting portion for connecting an input shaft, and the connecting portion is located inside the clutch. 3. The reverse input prevention clutch according to claim 2, wherein the connecting portion is provided on a cylindrical portion extending continuously from the inner peripheral side of the input side member toward the inside of the clutch. . 4. The reverse input prevention clutch according to claim 2, wherein the connecting portion is provided with at least one flat portion that fits flatly with the input shaft. 5. The reverse input prevention clutch according to claim 1, wherein the output side member integrally has a cylindrical output shaft portion. 6. The reverse input prevention clutch according to claim 5, wherein one end of the output shaft portion has a bottom. 7. The reverse input prevention clutch according to claim 5, wherein the output shaft portion is provided with at least one flat portion that is flatly fitted to another rotating member. 8. The locking means is provided on the circumferential surface provided on the stationary member and the output member, and forms a wedge gap between the circumferential surface and the circumferential surface in both forward and reverse rotation directions. A cam surface, a pair of engaging members interposed between the cam surface and the circumferential surface, and an elastic member for pressing the pair of engaging members in a direction of the wedge gap, respectively. ,
An engagement element that selectively engages with any one of the pair of engagement elements and presses the engagement element in a direction opposite to the direction of the wedge gap. A rotation element provided in the output-side member in a rotation direction, and a rotation between the engagement element of the lock release means and the engagement element at a neutral position of the lock release means and the torque transmission means; The direction gap δ1 and the rotational direction gap δ2 between the engaging elements of the torque transmitting means are δ1 <
The reverse input prevention clutch according to claim 1, wherein the clutch has a relationship of δ2. 9. A projection provided on one of the input-side member and the output-side member, wherein the torque transmission means includes:
9. The reverse input prevention clutch according to claim 8, wherein the clutch is a concave portion provided on the other side and adapted to the convex portion. 10. The reverse input according to claim 9, wherein said convex portion is a protrusion provided on said output side member, and said concave portion is a notch provided on said input side member. Prevention clutch. 11. The reverse input prevention according to claim 9, wherein the convex portion is a protrusion provided on the output side member, and the concave portion is a hole provided on the input side member. clutch. 12. The reverse input prevention clutch according to claim 10, wherein the protrusion protrudes in an outer radial direction. 13. The reverse input prevention clutch according to claim 10, wherein the protrusion protrudes in an axial direction. 14. The elastic member includes a base, and a tongue piece extending from the base to one side in the axial direction. The tongue piece is interposed between the pair of engagement elements, and 9. The reverse input prevention clutch according to claim 8, wherein the engagement members are pressed in a direction in which the engagement members are separated from each other. 15. The reverse input prevention clutch according to claim 14, wherein the base has a ring shape, and a plurality of the tongue pieces are arranged in a circumferential direction. 16. The reverse input prevention clutch according to claim 8, wherein said engaging element is a roller. 17. The reverse input prevention clutch according to claim 1, further comprising a fixed side plate fixed to the stationary side member, wherein the fixed side plate is a plastic processed product of a metal plate. 18. The fixed side plate has a bearing portion for supporting an input shaft in a radial direction.
7. The reverse input prevention clutch according to 7. 19. The reverse input prevention clutch according to claim 18, wherein the bearing portion is provided on a cylindrical portion extending continuously from the inner peripheral side of the fixed side plate toward the inside of the clutch.