JPH11117958A - Clutch mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clutch mechanism to facilitate assembly work with the whole of a device reduced in size and stabilize a product. SOLUTION: A driven gear rotated through drive of a motor is fixed on a rotary shaft 4, the rotary shaft 4 is extended through an outer race 8, and a plurality of release levers 9c arranged at a lock operation member 9 is intervened between the outer race 8 and the rotary shaft 4. A plurality of sets of rollers 10 and 11 are displaceable to a position wherein through intervention between the outer race 8 and the rotary shaft 4 and floating between the outer race 4 and the rotary shaft 4, rotation of the rotary shaft 4 is permitted, and a position wherein and a lock position wherein rotation of an outer race 4 and a lock position wherein rotation of the rotary shaft 4 is blocked through nipping between the outer race 8 and the rotary shaft 4 are positioned at the two ends of the release lever 9c, and the rollers 10 and 11 are always situated in the lock position through the force of the spring member 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch mechanism for switching a desired rotation using a driving means between a transmission state and a non-transmission state.

[0002]

2. Description of the Related Art Conventionally, a rotation transmitting mechanism for transmitting the rotational drive of a driving means such as a motor has been used to prevent unexpected rotation of the entire rotation transmitting mechanism against an external force other than the driving means, or to transmit the external force to the driving means. There has been known a clutch mechanism provided for prevention, switching of a transmission state between a driving unit and a transmission mechanism, and the like.

[0003]

As such clutch means, those using an electromagnetic clutch are known, but when an electromagnetic clutch is used, wiring for the electromagnetic clutch is provided separately from the motor wiring. Not only is it necessary,
The system is complicated, causing problems such as a rise in component costs and an increase in the size of the electromagnetic clutch body.

[0004] Further, a device using a friction clutch utilizing surface friction force is known. When a friction clutch is used, a pressing force load for securing a fixing force (surface friction force) and a friction clutch are used. Therefore, a large reaction force for moving the clutch plate against the pressing load is required to eliminate the surface frictional force caused by the pressure and to ensure the ease of rotation. For this reason, there is a problem that the clutch portion becomes large.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a clutch mechanism capable of facilitating an assembling operation and stabilizing a product while keeping the overall size of the apparatus small. Aim.

[0006]

In order to achieve the above object, according to the present invention, there is provided a rotary drive member which rotates by receiving a drive from a drive means, and a rotary shaft which rotates in synchronization with the rotary drive member. An outer race through which the rotating shaft passes, fixing means for fixing the outer race, a lock operation member having a plurality of release levers interposed between the outer race and the rotating shaft; An unlocked position interposed between the outer race and the rotating shaft so as to be positioned at both ends of a lever, and allowing the rotation of the rotating shaft by allowing free movement between the outer race and the rotating shaft; A composite that can be displaced to a locked position that prevents rotation of the rotary shaft by being sandwiched between the outer race and the rotary shaft. And the set of rollers, and summarized in that at all times the roller and a biasing means is positioned at the lock position.

According to a second aspect of the present invention, there is provided a rotary drive member which rotates by receiving a drive from a drive means, a rotary shaft which rotates in synchronization with the rotary drive member, and an outer race through which the rotary shaft passes. A gear, a lock operation member having a plurality of release levers interposed between the outer race gear and the rotary shaft, and a lock operating member having the release race lever and the rotary shaft positioned at both ends of the release lever. A lock position interposed between the outer race gear and the rotating shaft, and a floating position between the outer race gear and the rotating shaft that allows only rotation of the rotating shaft by floating between the outer race gear and the rotating shaft. A plurality of sets of rollers displaceable to an unlocked position where the outer race gear rotates integrally with the rotating shaft, and Time and summarized in that and a biasing means is positioned at the lock position.

[0008]

Next, an embodiment of a clutch mechanism according to the present invention will be described with reference to the drawings.

In FIG. 5, 1 is a motor as driving means, 2 is a driving gear mounted on an output shaft 1a of the motor 1,
Reference numeral 3 denotes a transmission gear serving as a rotary drive member that meshes with the drive gear 2, and 4 denotes a fixed transmission gear 3 and a pair of bearings 5.
5, a rotating shaft held rotatably at 5, and a clutch unit 7 so that the rotating shaft 4 passes through relative rotation.
Is an outer race held by the holding bracket 6, and 9 is a lock operation member.

As shown in FIG. 2, the inner peripheral wall of the outer race 8 has recessed portions 8a, 8a so that a pair of rollers 10, 11 are independently located between the inner peripheral wall and the rotary shaft 4.
8b are formed in plural sets. In addition, outer race 8
The inner peripheral wall has a holding portion 8c that separates the adjacent rollers 10 and 11 different from those that are operatively paired and that holds the spring member 12 that is biased in a direction away from each other. Are formed. Each spring member 12 is formed integrally with a ring 13 through which the rotating shaft 4 passes.

As the wall surfaces of the recesses 8a and 8b approach each other, the distance between the wall surfaces of the recesses 8a and 8b and the rotating shaft 4 becomes narrower.
Rollers 10 and 11 are sandwiched between b and the rotating shaft 4.

Accordingly, since the outer race 8 is fixed to the clutch unit 7 via the holding bracket 6, a wedge action is generated on the rollers 10, 11 sandwiched between the concave portions 8a, 8b and the rotary shaft 4. By this wedge action, bidirectional rotation of the rotary shaft 4 is regulated.

The lock operating member 9 is, as shown in FIG.
A ring-shaped base 9a, an operation knob 9b protruding outward from the base 9a, and a substantially convex portion formed so as to protrude from three equally dividing points on the surface side of the base 9a and having a pair of rollers 10, 11 positioned at both ends. A release lever 9c having a shape is integrally provided.

In the above configuration, the above-described rollers 10,
When rotating the rotating shaft 4 in a state where the rotation is restricted by the wedge action of 11, the operation knob 9c is operated to move the lock operation member 9 to the rotation shaft 4 as shown in FIG. When the roller 11 is rotated in the same direction as the desired rotation direction, the release lever 9c displaces the roller 11 against the bias of the spring member 12, whereby the roller 11 rolls between the recess 8b and the rotating shaft 4. Becomes possible.

When the motor 1 is driven from this state, the rotating shaft 4 is rotated via the driving gear 2 and the driven gear 3, and the rotation of the rotating shaft 4 drives or utilizes the rotational driving of the motor 4. Communication becomes possible.

At this time, the rotation of the rotating shaft 4 does not hinder the rotation of the rotating shaft 4 because the sandwiched state of the concave portion 8a and the rotating shaft is released with the rotation of the rotating shaft 4.

By the way, in the above-described embodiment, the drive accompanying the drive of the motor 4 is achieved by transmitting the drive by the rotation of the rotary shaft 4 itself or the rotation of the rotary shaft 4 to another power transmission mechanism or the like (not shown in particular). Was possible,
For example, as shown in FIGS. 3 and 4, recesses 18 a, 18 b and a holding portion 18 c similar to the recesses 8 a, 8 b and the holding portion 8 c are formed on the inner circumferential wall of the outer race gear 18, and the outer circumferential wall thereof has By forming the gear portion 18d and rotating the outer race gear 18 integrally with the rotary shaft 4, it is also possible to transmit the rotational drive of the gear portion 18c to another driven portion.

In such a configuration, the concave portions 18a, 18
In a state in which the rollers 10 and 11 are sandwiched between the shaft b and the rotating shaft 4 to generate a wedge action, the outer race gear 18 and the lock operating member 9 rotate integrally with the rotating shaft 4 by being driven by the motor. When the lock operation member 9 is operated, only the rotating shaft 4 rotates and the outer race gear 1 is rotated.
The transmission of rotation after 8 can be cut off.

In the case of such a configuration, by interlocking the lock operation member 9 with an external force, only the outer race gear 18 rotates with the external force, thereby preventing unexpected rotation of the rotary shaft 4. Is also possible.

[0020]

As described above, according to the clutch mechanism of the present invention, the rotary drive member that rotates by the drive of the drive means, the rotary shaft that rotates in synchronization with the rotary drive member, An outer race through which a rotating shaft passes, fixing means for fixing the outer race, a lock operation member having a plurality of release levers interposed between the outer race and the rotating shaft, and both ends of the release lever A non-locking position interposed between the outer race and the rotating shaft so as to be positioned at a position and allowing the rotation of the rotating shaft by floating between the outer race and the rotating shaft; and And a plurality of sets that can be displaced to a lock position for preventing rotation of the rotary shaft by being sandwiched between the rotary shaft and the rotary shaft. And b, by the always the roller and a biasing means for positioning the locking position, while maintaining the size of the entire apparatus, facilitation of assembly work,
A rotation driving member that rotates in response to the driving of the driving means, a rotation shaft that rotates in synchronization with the rotation driving member, an outer race gear that the rotation shaft penetrates, A lock operating member having a plurality of release levers interposed between the outer race gear and the rotary shaft; and a lock operating member interposed between the outer race gear and the rotary shaft so as to be positioned at both ends of the release lever. The rotating position is provided between the outer race gear and the rotating shaft, and a locked position allowing only rotation of the rotating shaft by floating between the outer race gear and the rotating shaft. A plurality of sets of rollers displaceable to an unlocked position where the outer race gear rotates integrally with the shaft; By and a biasing means is positioned at the click position, it can be a highly versatile clutch mechanism.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part showing a clutch mechanism according to an embodiment of the present invention.

2A and 2B show a clutch mechanism according to an embodiment of the present invention, wherein FIG. 2A is a cross-sectional view of a main part in a rotation-prevented state, and FIG. 2B is an enlarged cross-sectional view of a main part allowing rotation in one direction. .

FIG. 3 is an exploded perspective view of a main part showing a clutch mechanism according to a modification of the embodiment of the present invention.

FIG. 4 is a cross-sectional view of a main part of a clutch mechanism according to a modification of the embodiment of the present invention in a rotation-prevented state.

FIG. 5 is a side view of a power transmission device using the clutch mechanism according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Motor (drive means) 3 ... Driven gear (rotation drive member) 4 ... Rotary shaft 6 ... Holding bracket (fixing means) 8 ... Outer race 9 ... Lock operation member 9c ... Release lever 10 ... Roller 11 ... Roller 12 ... Spring Member (biasing means)

Claims (2)

[Claims] 1. A rotary drive member that rotates by receiving a drive from a drive unit, a rotary shaft that rotates in synchronization with the rotary drive member, an outer race that the rotary shaft passes through, and a fixing that fixes the outer race. Means, a lock operating member having a plurality of release levers interposed between the outer race and the rotary shaft, and a lock operating member between the outer race and the rotary shaft positioned at both ends of the release lever. The rotating shaft is interposed and rotatably moves between the outer race and the rotating shaft to allow rotation of the rotating shaft and is held between the outer race and the rotating shaft. A plurality of sets of rollers that can be displaced to a lock position for preventing rotation of the roller, and urging means for always positioning the rollers in the lock position; A clutch mechanism, characterized in that it comprises. 2. A rotary drive member which rotates by receiving a drive of a drive means, a rotary shaft which rotates in synchronization with the rotary drive member, an outer race gear penetrated by the rotary shaft, the outer race gear and A lock operating member having a plurality of release levers interposed between the rotary shaft and the outer race interposed between the outer race gear and the rotary shaft so as to be positioned at both ends of the release lever; A lock position allowing only rotation of the rotating shaft by floating between a gear and the rotating shaft, and the outer shaft being integrally formed with the rotating shaft by being sandwiched between the outer race gear and the rotating shaft. A plurality of sets of rollers displaceable to an unlocked position where the race gear rotates, and A clutch mechanism, characterized in that it comprises a means.