JPS6314207B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a one-way rotating clutch that is capable of transmitting rotation in only one of the left and right rotation directions of a rotating body to another rotating body.

Various types of one-way rotating clutches have been known and used in the past, but the conventional ones had problems in that they had complicated mechanisms, had a large number of parts, and were expensive.

The present invention provides a one-way rotating clutch whose construction is extremely simple and inexpensive. Hereinafter, the present invention will be explained based on illustrated embodiments.
FIG. 1 is a side sectional view of this embodiment, in which 1 is a first rotating body, 2 is a second rotating body, and 3 is a first rotating body 1.
A connecting piece 4 having a crescent shape or a shape similar to the crescent shape, which engages and drives the second rotary body 2, is planted on the substrate 5, and connects the first and second rotary bodies 1 and 2 in the vertical direction. The two rotating bodies 1 and 2 are prevented from coming off by a retaining mechanism 6, and their positions are regulated.

2A and 2B are a bottom view and a side view of the first rotating body 1, and FIGS. 3A and 3B are a top view and a side view of the second rotating body 2. In those drawings, 7 and 8 are holes into which the shaft 4 is fitted, and a protrusion 11 is formed in a part of the eccentric circular cam groove 9 toward the center.
Step portions 12 and 13 having different lengths are provided at both ends thereof. In addition, the eccentric circular cam groove 1 of the second rotating body 2
0, a stepped portion 14 is formed on the circumferential wall toward the center.

FIG. 4 is a top view of essential parts of this embodiment. On the opposing surfaces of each of the rotating bodies 1 and 2, there are
As is clear from the figure, a crescent-shaped connecting piece 3 is housed therein, and eccentric circular cam grooves 9, 10 are formed to engage with the crescent-shaped connecting piece 3. The connecting piece 3 is rotatably housed in the space formed by the eccentric circular cam grooves 9 and 10.

5 and 6 show the eccentric circular cam grooves 9 and 1.
In the enlarged plan view of the portion 0, the broken line represents the shape of the eccentric circular cam groove 9, and the solid line represents the shape of the eccentric circular cam groove 10.

Next, the operation of this embodiment configured as described above will be explained with reference to FIG.

As the first rotary body 1 is rotationally driven in the direction of arrow A, the rotatably housed connecting piece 3 is brought into contact with the stepped portion 12 at one end 17 and rotates around the eccentric cam groove 10. It is rotated in the same direction as the rotation of the first rotating body 1 along the peripheral wall surface. When the other end 18 of the connecting piece 3 reaches the stepped portion 14 of the eccentric circular cam groove 10, it comes into contact with it, and the rotation of the first rotating body 1 is transferred to the second rotation via the connecting piece 3. transmitted to body 2. The distance between one corner 15 of the stepped portion 12 and the stepped portion top 16 of the stepped portion 14 is equal to the distance between each end 1 of the connecting piece 3.
Since it is formed to be shorter than the distance between 7 and 18, the connecting end 18 reliably comes into contact with the stepped portion 14. In FIG. 4, the end portion 18 is the stepped portion 14.
This shows the state on the verge of coming into contact with.

Next, the operation when the first rotating body 1 is rotationally driven in the direction of arrow B will be described with reference to FIG. 6.

As the first rotating body 1 is rotationally driven in the direction of arrow B, the rotatably housed connecting piece 3 has one end 18 at the longer stepped portion 1 of the eccentric circular cam groove 9.
3 and is rotated in the same direction as the rotation of the first rotating body 1. The eccentric circular cam groove 1 is further rotated.
The gap between the top 16 of the stepped portion 16 and the outer periphery of the shaft reaches the narrowest point, but since this gap is formed to be slightly larger than the thickness of the connecting piece 3, the connecting piece 3 It passes through the section, is further rotated, and this state is repeated. Yotsute connection piece 3
Since the first rotating body 1 and the second rotating body 2 do not engage with each other, the rotation of the first rotating body 1 is not transmitted to the second rotating body 2. FIG. 6 shows the connecting piece 3 passing through the narrowest part.

As is clear from the above explanation, the present invention has an extremely simple configuration and can reliably transmit (on) rotation.
Non-transmission (off) is possible.

The connecting piece 3 has a crescent shape with a curvature similar to the curvature of the eccentric circular cam grooves 9 and 10, and has a simple shape with no unevenness. During idle rotation (non-transmission), the connecting piece 3 can freely rotate within the space formed by the eccentric circular cam grooves 9 and 10 along the smooth wall surface of the eccentric circular cam groove 10 with almost no resistance. . Therefore, torque loss during idling can be reduced to almost zero, and smooth idling can be achieved, resulting in no torque unevenness and quiet rotation. These features make the present invention inherently adaptable to high speed rotations.

In addition, the configuration of the one-way rotating clutch can be accommodated within the thickness of the two rotating bodies, and the dimensions of the one-way rotating clutch can be adjusted arbitrarily according to the diameter of the rotating bodies, making it easy to make it smaller and thinner. I can do it.

Further, an eccentric circular cam groove 9, which is the driving side of the present invention, is formed on both sides of one rotating body, and an eccentric circular cam groove 10, which is the driven side, is formed on the upper and lower sides of the rotating body,
By configuring the rotation transmission direction of each one-way rotation clutch to be reversed, the power can be separated and efficiently transmitted to separate rotation bodies by switching the rotation direction of the drive-side rotation body. can also be achieved very easily. In addition, when making pulleys etc. from resin molded products, if this one-way rotation clutch is formed at the same time, the one-way rotation clutch function can be added just by adding the crescent-shaped connecting piece, and if removed, it can be used as a simple pulley. It has many excellent features, such as being able to be realized at extremely low cost.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of the main part of the embodiment of the present invention, Fig.
Figures A and B are a bottom view and a side view of the first rotating body in the same embodiment, Figures 3A and B are top views and side views of the second rotating body in the same embodiment, and Figure 4 is the same embodiment. FIGS. 5 and 6 are enlarged top views of essential parts in various states for explaining the operation of the embodiment, and FIG. 7 is an exploded perspective view of the same. 1... First rotating body, 2... Second rotating body, 3
... Connection piece, 4 ... Shaft, 5 ... Board, 9, 10 ...
...Eccentric circular cam groove, 11...Protrusion, 12, 13,
14...Step part.

Claims (1)

[Claims] 1 first and second rotating bodies coaxially and rotatably supported; a crescent-shaped connecting piece interposed between the first and second rotating bodies;
The connecting piece formed on the side of the first rotating body facing the second rotating body is caused to follow the first rotating body, and the radius changes continuously in the circumferential direction from a starting point. a driving groove cam having a protrusion protruding toward the center of rotation that separates the starting point and the ending point; and a driving groove cam formed on the side of the second rotating body facing the first rotating body , when the connecting piece follows the first rotating body and rotates in a first rotational direction, it is engaged, and when it rotates in a second rotational direction opposite thereto, it is in a disengaged state; an engaging groove cam that goes around the starting point one turn while continuously changing the radius in the circumferential direction and reaches the ending point, and has a stepped portion toward the center of rotation between the starting point and the ending point, A one-way rotating clutch characterized in that transmission of rotational force from the first rotating body to the second rotating body is turned on or off depending on the rotational direction of the rotating body.