JPH05126168A - One-way clutch - Google Patents

Abstract

PURPOSE:To reduce a number of component parts for facilitating assembling, and increase space utilization rate for increasing a load capacity per unit volume and achieving a compact size. CONSTITUTION:A plural slits 4 are formed from the side of an inner wheel 1 to the side of an outer wheel 2 for an actuation member 3 integrated with the outer wheel 2 with an end part 5 on the depth side inclined toward a void rotation direction of the outer wheel 2. A contact part 7 where the actuation member 6 gets in contact with the inner wheel 1 is thus enabled to deform elastically along the circumference, and a strut angle is generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-way clutch.

[0002]

2. Description of the Related Art Conventional one-way clutches include those using sprags having a non-circular cross section and those using rollers or balls having a circular cross section as an operating member. A one-way clutch using a sprag inserts a sprag with a non-circular cross section between the inner ring and the outer ring, retains the sprags at equal intervals, and sprags on both the inner ring and the outer ring at all times. A spring for pressing is inserted. A one-way clutch using an actuating member such as a ball having a circular cross-section has a tapered surface formed in the inner surface of the outer ring in the rotational direction, and an actuating member such as a ball is interposed between the tapered surface and the inner ring.

[0003]

A conventional one-way clutch using a sprag has a problem that it requires a lot of parts and requires skill and time to assemble. Further, since it is necessary to mount a retainer or a spring between the sprags, the space utilization rate becomes low. In addition, the one-way clutch using balls and rollers is costly because the outer ring is complicated to machine, and because the rolling distance of the operating members such as the balls is relatively large during operation, the spacing between them and other operating members is large. However, there is a problem that the space utilization rate is low due to the large size. Therefore, the present invention is intended to provide a one-way clutch that has a reduced number of parts to facilitate assembly, and also has a high space utilization rate to increase a load capacity per unit volume to enable downsizing. is there.

[0004]

Therefore, the present invention provides
An operating member that is in contact with the inner ring (or outer ring) and is integrated with the outer ring (or inner ring), and the inner end of the operating member from the inner ring side (or outer ring side) to the outer ring side (or inner ring side) (Or inner ring) is inclined toward the idling direction, and a plurality of slits formed at equal intervals are provided.

[0005]

According to the present invention, the inner end of the actuating member integrated with the outer ring (or the inner ring) extends from the inner ring side (or the outer ring side) to the outer ring side (or the inner ring side), and the rear end portion is the outer ring (or the inner ring). Since a plurality of slits are formed by inclining toward the idling direction, the contact portion of the actuating member with the inner ring side (or the outer ring side) can be slightly elastically deformed in the circumferential direction.

As a result, when the inner ring and the outer ring are attempted to rotate relatively in the idling direction while the operating member between the slits is in contact with the inner ring (or the outer ring), the inner ring (or the inner ring) of the operating member is rotated. The contact portion with the outer ring) receives a reaction force due to the contact resistance, and the direction of the reaction force is the direction in which the operating member is retracted to the outer ring side (or the inner ring side) due to the inclination of the slit. Therefore, the reaction force due to the contact resistance does not increase from the initial value, but rather tends to decrease.

On the other hand, when an attempt is made to relatively rotate the inner ring and the outer ring in the opposite direction to the idling direction, the contact portion of the actuating member with the inner ring (or outer ring) receives a reaction force due to the contact resistance. The direction of the reaction force is the direction in which the actuating member advances toward the inner ring side (or the outer ring side) due to the inclination of the slit. Therefore, the reaction force due to the contact resistance rapidly increases with rotation and locks the inner ring and the outer ring.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an enlarged sectional view of a part of the first embodiment. As shown in the drawing, in the one-way clutch of the embodiment, an operating member 3 integrated with an outer ring 2 is fitted on the outer side of an inner ring 1, and a radial direction is applied from the inner ring 1 side of the operating member 3 to the outer ring 2 side. Slit 4 slightly tilted clockwise
Are formed at equal intervals over the entire circumference. The end portion 5 of the slit 4 on the outer ring 2 side is formed wide so as to avoid concentration of stress and also serves as a space for filling with lubricating grease. The plate-like portion formed by the slit 4 in which the operating member 3 is adjacent to each other becomes the sprag portion 6. The tip of the sprag portion 6 has a convex shape and contacts the inner ring 1 at the apex 7.

In this way, the sprag portion 6 is formed in a plate shape with the rotation direction being the thickness direction by the slit 4, and the end portion 5 of the slit 4 is formed wide, so that the sprag portion 6 is formed. The tip can be slightly bent in the rotation direction. This bending hardly occurs in the operating member 3 before the slit 4 is formed. Further, due to the inclination of the slit 4, when the tip of the sprag portion 6 is slid so as to rotate clockwise, the sprag portion 6
Of the inner ring 1 tends to be separated from the inner ring 1. On the contrary, when the tip of the sprag portion 6 is slid so as to rotate in the counterclockwise direction, the tip of the sprag portion 6 bends toward the inner ring 1.

That is, in the one-way clutch shown in the figure,
When the outer ring 2 is rotated clockwise with the inner ring 1 fixed, the tip of the sprag portion 6 slides on the inner ring 1 to generate resistance. However, due to this resistance force, the sprag portion 6 bends rearward and tries to move away from the inner ring 1, and as a result, the resistance is reduced and continuous rotation becomes possible. This rotation is so-called idling, and this rotation direction is the idling direction. On the contrary, when the outer ring 2 is rotated counterclockwise with the inner ring 1 fixed, resistance is generated at the tip of the sprag portion 6. Due to this resistance force, the sprag portion 6 bends rearward in the rotational direction and approaches the inner ring 1 to increase the contact pressure. As a result, the resistance increases and it becomes impossible to continue the rotation. This state is the so-called locked state.

FIG. 2 is an enlarged sectional view showing a part of the second embodiment. The difference between this embodiment and the first embodiment is that the curvature of the tip of the sprag portion 16 formed on the actuating member 13 is the same as that of the inner ring 1, and the cross-sectional shape of the slit 14 is convex in the anti-idling direction and outward. That is, the shape of the end 15 of the slit 14 is smaller than that of the end 5. This embodiment also operates as a one-way clutch by bending the sprag portion 16 similarly to the first embodiment. In particular, in this embodiment, the tip of the sprag portion 16 is substantially in surface contact with the inner ring 1, so that the wear resistance is excellent.

FIG. 3 is an enlarged sectional view showing a part of the third embodiment. In this embodiment, the cross-sectional shape of the tip of the sprag portion 26 is formed to have substantially the same curvature as that of the inner ring 1, and the contact point 27 with the inner ring 1 in the idling or stopped no-load state is shown by the solid line in the figure. As described above, the tip is on the idling direction side. As a result, when a load is applied, the sprag portion 26 is deformed and its posture is rotated counterclockwise so that the entire tip of the sprag portion 26 comes into contact with the inner ring 1 as indicated by a virtual line in the figure. In this embodiment, since the sprag portion 26 is in surface contact with each other in an operating state, it is excellent in wear resistance and impact resistance. The configuration of other parts not shown is
It is almost the same as the first and second embodiments.

In each of these embodiments, the actuating members 3 and 13 integrally formed with the outer ring 2 are assembled only by fitting them to the inner ring 1, so that the number of assembling steps can be greatly reduced. The material of the operating members 3 and 13 of the one-way clutch of the above-described embodiment may be either metal or engineering plastic. Particularly, when the operating members 3 and 13 are molded from engineering plastic, an inexpensive one-way clutch can be obtained. Can be provided. Further, in each of the embodiments, the operating member is formed integrally with the outer ring, but the operating member may be formed integrally with the inner ring.

[0014]

According to the present invention, the actuating member is integrated with the outer ring (or inner ring), so that the constituent parts are two points, that is, the inner ring (or outer ring) and one actuating member. It is possible and very easy to assemble. In addition, each part of the actuating member separated by equally spaced slits contacts the inner ring (or outer ring) and receives a load when the lock is actuated, so that the extra space in the circumferential direction is minimized and The value of transmission torque becomes large. That is, it is possible to make the size significantly smaller than the conventional one.

[Brief description of drawings]

FIG. 1 is a sectional view showing a part of a first embodiment in an enlarged manner.

FIG. 2 is a cross-sectional view showing an enlarged part of the second embodiment.

FIG. 3 is a cross-sectional view showing an enlarged part of the third embodiment.

[Explanation of symbols]

 1 Inner ring 2 Outer ring 3 Operating member 4 Slit 5 End part 6 Sprag part 7 Apex 13 Operating member 14 Slit 15 End part 16 Sprag part 26 Sprag part 27 Contact point

Claims (1)

[Claims] 1. An operating member that is in contact with an inner ring (or an outer ring) and is integrated with an outer ring (or an inner ring), and an inner part of the operating member (or an outer ring side) to an outer ring side (or an inner ring side) A one-way clutch comprising a plurality of slits formed at equal intervals while inclining a side end of the outer ring (or the inner ring) toward the idling direction.