JPH09177836A - One-way clutch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a manufacturing cost by a method wherein a high clutch function is held but capacity of radial load resisting capacity is reduced to a value lower than that of a one-way clutch. SOLUTION: A one-way clutch is formed in such a manner that slide bearings are arranged at the two end parts of an outer ring and a holder 11, a rolling body 15, and a spring 16 are arranged between the two slide bearings, an opening end part 17 through which the rolling body 15 and the spring 16 are inserted in the holder is formed in one end face of the holder 11, and a non-opening end part 18 having a holder in which the rolling body 15 and the spring 16 are held is formed at the other end face. In the one-way clutch, the holder 11 and a slide bearing 12 on the non-opening end part 18 side of the holder are integrally molded to form a holder 10 with a bearing made of resin, and a slide bearing surface is formed on the inside diameter surface of the bearing part of the holder 10 with a bearing.

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 for industrial machines and office equipment, and more specifically, it requires high clutch function reliability but relatively low radial load resistance. Regarding directional clutch.

[0002]

2. Description of the Related Art As a conventional highly reliable one-way clutch integrated with a bearing, there is a one-way clutch as shown in FIG. 3 or 4. This one-way clutch has the following features.

That is, the outer ring 3 is made of a material having hardness and wear resistance, such as bearing steel, and the sliding bearings 2 made of sintered metal are press-fitted as radial bearings on both end faces thereof. There is. The cage 1 and the spring 5 are made of resin or stainless steel.

Further, the cage 1 is provided with pockets for arranging the rolling elements 4 and the springs 5, and the open end portion 6 for inserting the rolling elements 4 or the like into one end surface of the cage 1. And a non-open end 7 for holding the rolling elements 4 and the like is formed on the other end surface.

In the above one-way clutch, a cage 1, a rolling element 4 and a spring 5 are arranged in an outer ring 3, and bearings 2 are provided at both ends thereof.
Are formed by arranging.

[0006]

The above-mentioned one-way clutch has a high clutch function and a large radial load resistance. However, depending on the application, although the reliability of the clutch function is required, there is a case where a large radial load resistance is not required. The slide bearing used for such an application does not necessarily have to have a large radial load resistance capability. Further, if the one-way clutch is used for such an application, the cost will increase.

Therefore, the object of the present invention is to maintain a high clutch function, but by lowering the radial load resistance capability as compared with the one-way clutch, it is possible to reduce the manufacturing cost.

[0008]

In order to solve the above problems, the present invention has slide bearings at both ends of an outer ring, and a cage, a rolling element and a spring are arranged between the slide bearings. One end surface of the retainer forms an open end for inserting the rolling element and spring into the retainer, and the other end surface forms a non-open end for retaining the rolling element and spring in the retainer. In a one-way clutch, the cage and the plain bearing on the non-opening end side of the cage are integrally molded to form a cage with resin bearing, and the inner diameter of the bearing portion of the cage with bearing. The plain bearing surface was formed on the surface.

Since at least the slide bearing on the non-open end side of the cage of the one-way clutch is made of resin, the radial load resistance is lower than that of the conventional one-way clutch. Since the slide bearing on the end side is integrated with the cage, the number of parts and the manufacturing cost can be reduced. Further, since the inner ring, the outer ring, the cage, the rolling elements, and the spring are the same as those of the conventional one-way clutch described above, a high clutch function can be maintained.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG.

As shown in FIG. 1, an outer ring 14 made of a material having hardness and wear resistance, such as bearing steel, has a resin retainer portion 11 and a resin slide bearing as a radial bearing. A cage 10 with a bearing in which the portion 12 is integrated and a slide bearing 13 as a radial bearing are press-fitted, and a rolling element 15 and a spring 16 made of resin or stainless steel rollers are arranged in the cage 10 with a bearing. Has been done.

The cage portion 11 of the cage with bearing 10
Is provided with a pocket for arranging the rolling element 15 and the spring 16, and an opening end portion 17 for inserting the rolling element 15 or the like is formed on one end face of the cage 10 with bearing.
On the other end surface, a non-open end portion 18 for holding the rolling elements 15 and the like is formed. The plain bearing portion 12 is joined to an end portion of the cage portion 11 on the non-opening end portion 18 side.

The resin used for the cage with bearing 10 is not particularly limited, but a resin having rigidity is preferable and, for example, a polyimide resin or a super engineering plastic resin can be used. Further, the plain bearing 13 which is not joined to the cage portion 11 may be made of resin or sintered metal.

In the one-way clutch, the cage 10 with bearing is press-fitted into the outer ring 14, the rolling element 15 and the spring 16 are inserted into the cage 10 with bearing, and finally the cage portion 11 is provided.
It is formed by arranging the slide bearing 13 on the open end 17 side of the.

The radial bearing surface of the one-way clutch is
As shown in FIG. 2 (a), in addition to the inner peripheral surface 19 of the plain bearing 13, the inner peripheral surface 2 of the plain bearing portion 12 of the cage with bearing is also provided.
Since it is formed as one, the function of the slide bearing can be exerted at both ends of the one-way clutch.

As shown in FIG. 2 (b), the positions of the rolling elements 15 and the springs 16 of the one-way clutch are such that the rolling elements 15 are in the pockets provided in the cage portion 11 of the cage 10 with bearings. Further, a recessed groove is provided on one side surface of the pocket portion of the retainer portion 11, and the spring 16 is inserted therein. In the case of the one-way clutch of the type shown in FIG. 2B, the space between the outer ring 14 and the inner ring inserted on the inner peripheral surface side of the cage portion 11, that is, the wedge-shaped space 23, in the pocket portion of the cage portion 11. The rolling element 15 is inserted into. The surface of the wedge-shaped space 23 on the outer ring side is not formed in a concentric circle, and is inclined inward in one direction (clockwise in the case of the one-way clutch of the type shown in FIG. 2B). The cam surface 24 is formed, and the distance between the inner ring and the outer ring of the wedge-shaped space 23 becomes smaller as it goes in the above direction (clockwise in the case of the one-way clutch of the type shown in FIG. 2B). ing.

Therefore, in the case of the one-way clutch of the type shown in FIG. 2 (b), the rolling element 15 is normally moved clockwise by the biasing force of the spring 16 (that is, the wedge-shaped space is narrowed). The rolling element 15 is bitten into both the outer ring 14 and the inner ring. For this reason,
When the outer ring 14 rotates counterclockwise, the rolling element 15 is kept in the wedge-shaped space 23, so that torque is transmitted from the outer ring 11 to the inner ring. On the other hand, when the outer ring 14 rotates in the clockwise direction, the rolling element 15 moves the spring 1
It moves in the counterclockwise direction in the figure (that is, in the direction in which the wedge-shaped space becomes wider) against the biasing force of 6. For this reason,
The rolling element 15 is released from the state of being bitten into both the outer ring 14 and the inner ring, and is in a free rotation state, and the torque of the outer ring 14 is not transmitted to the inner ring side. Therefore, torque in only one rotation direction is transmitted from the outer ring to the inner ring.

[0018]

According to the present invention, since the cage with bearings is made of resin, the sliding bearing portion of the one-way clutch is also made of resin, and the radial load resistance capacity of the one-way clutch is conventionally Although it is lower than that of the above one-way clutch, since one of the plain bearings and the cage are integrated, the number of parts and the manufacturing cost can be reduced.

Further, since parts similar to the conventional one-way clutch are used as the parts other than the cage with bearing, a high clutch function can be maintained.

Further, when the sliding bearing portion of the cage with bearing and the sliding bearing arranged on the open end side of the cage with bearing are different in material, the cage with bearing is opened due to the difference in material. The end side can be easily determined, and the direction in which the one-way clutch is connected can be easily determined.

[Brief description of the drawings]

FIG. 1 is a perspective view showing each component of a one-way clutch according to the present invention.

FIG. 2 (a) is a vertical sectional side view of a one-way clutch according to the present invention. FIG. 2 (b) is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view showing components of a conventional one-way clutch.

FIG. 4 is a vertical plan view of a conventional one-way clutch.

[Explanation of symbols]

 1 Cage 2 Sliding bearing 3 Outer ring 4 Rolling element 5 Spring 6 Opening end 7 Non-opening end 10 Cage with bearing 11 Cager part 12 Bearing part 13 Sliding bearing 14 Outer ring 15 Rolling element 16 Spring 17 Opening end 18 Non Opening end 19 Bearing inner peripheral surface 20 Bearing outer peripheral surface 21 Bearing inner peripheral surface 22 Bearing outer peripheral surface 23 Wedge-shaped space 24 Inclined cam surface

Claims (1)

[Claims] 1. An outer ring has slide bearings at both ends thereof, and a retainer, a rolling element and a spring are arranged between the both slide bearings, and one end surface of the retainer includes the rolling element and the spring. A one-way clutch that forms an open end to be inserted into the other end, and the other end surface forms a non-open end to hold the rolling element and the spring in the retainer, wherein the retainer and the non-open end of the retainer are provided. The one-way clutch is characterized in that the slide bearing on the side of the bearing is integrally molded to form a cage made of resin, and the slide bearing surface is formed on the inner diameter surface of the bearing portion of the cage with bearing. .