JP2003172377A - Manufacturing method for one-way clutch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for a one-way clutch capable of reducing man-hours for an outer ring. <P>SOLUTION: This manufacturing method for the one-way clutch is provided with a preparing process for preparing a disk shaped material 31 becoming the outer ring 12, a preliminary molding process for processing the disk shaped material 31 through cold press so as to reduce the thickness, a molding process for processing the disk shaped material 31 with a metallic mold having a shape so that a plurality of pocket parts 21 and holding parts 22 and 23 can be simultaneously punched through cold punch process so that the outer ring 12 is completed, and an assembling process for putting an elastic member 14 and a roller 13 into the pocket part 21 of the outer ring 12 and fitting the outer ring 12 on an outer periphery of the shaft member 11 so that the one-way clutch 1 can be completed. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a one-way clutch, and more particularly, to a shaft member and a plurality of pockets arranged on the outer peripheral side of the shaft member and recessed toward the outer peripheral side on the inner peripheral surface. The present invention relates to a method for manufacturing a one-way clutch including an outer ring having a portion, a roller and an elastic member housed in a plurality of pocket portions.

[0002]

2. Description of the Related Art A one-way clutch of this type includes a shaft member,
An outer ring having a plurality of pockets arranged on the outer peripheral side of the shaft member and recessed on the inner peripheral surface toward the outer peripheral side;
The roller and the elastic member housed in the plurality of pockets are provided. In such a one-way clutch, a disc-shaped material is broached to form a plurality of pocket portions and a through hole for fitting with a shaft member to complete an outer ring, and a roller is provided in the plurality of pocket portions. And an elastic member are incorporated, and the outer ring is fitted to the shaft member.

[0003]

In manufacturing the outer ring of the one-way clutch, the number of processing steps is large because the pocket portion is formed by using a plurality of broaches. An object of the present invention is to provide a method for manufacturing a one-way clutch that can reduce the number of man-hours for processing the outer ring.

[0004]

A method for manufacturing a one-way clutch according to a first aspect of the present invention is provided with a shaft member and an outer peripheral side of the shaft member, the inner peripheral surface of which is recessed toward the outer peripheral side. A method for manufacturing a one-way clutch including an outer ring having a plurality of pocket portions, and a roller and an elastic member housed in the plurality of pocket portions, the method including the following steps.

A preparation step of preparing a disc-shaped material. A preforming process that cold-presses a disk-shaped material to reduce the plate thickness. Following the preforming step, a step of cold-pressing the disk-shaped material to form a through hole for fitting the shaft member and a plurality of pockets to complete the outer ring. An assembly process in which the roller and elastic member are installed in the pocket and the outer ring is fitted to the shaft member.

In this method for manufacturing a one-way clutch, the disc-shaped material is cold-pressed (molding step),
The feature is that the outer ring is manufactured. by this,
The number of processing steps can be reduced as compared with the conventional case where an outer ring is molded using a plurality of broaches. A method for manufacturing a one-way clutch according to a second aspect is the method for manufacturing a one-way clutch according to the first aspect, in which the outer ring is held so that the roller and the elastic member do not fall off from the pocket portion to the inner peripheral side of the outer ring by a molding process. The part is further molded.

In this method of manufacturing a one-way clutch, since the holding portion can be formed together with the formation of the through hole and the pocket portion in the forming step, the number of processing steps does not increase even if the outer ring has a complicated shape.

[0008]

1 is a sectional view of a one-way clutch 1 according to one embodiment of the present invention. (1) Configuration A one-way clutch 1 shown in FIG. 1 includes a shaft member 11 and an outer ring 1.
2, the roller 13, the elastic member 14, and the lid member 15 are mainly configured.

The shaft member 11 is a cylindrical member for transmitting torque between the shaft member 11 and the outer ring 12. The outer ring 12 is an annular member made of metal, and has a through hole 12a into which the shaft member 11 fits, and a plurality of pockets provided on the inner peripheral surface so as to be recessed toward the outer peripheral side at equal intervals in the circumferential direction. It has a portion 21 (six in this embodiment) and holding portions 22 and 23 (see FIG. 2) provided at the circumferential edge of the pocket portion 21 so that the opening width of the pocket portion 21 becomes small. ing. Further, the concave surface of the pocket portion 21 is provided with an inclined surface such that the distance between the concave surface of the pocket portion 21 and the outer peripheral surface of the shaft member 11 becomes smaller toward one side in the circumferential direction (left side of the drawing in FIG. 2). 21a is formed.

The roller 13 is a cylindrical member provided corresponding to the inclined surface 21a in the pocket portion 21, and is provided between the shaft member 11 and the outer ring 12 to transmit torque. ing. The elastic member 14 is, for example, an accordion spring formed by bending a metal plate member,
The roller 13 is provided so as to urge the roller 13 in a direction in which the distance between the inclined surface 21a and the outer peripheral surface of the shaft member 11 decreases.

The lid member 15 is a member for covering the outer peripheral surface of the outer ring 12 and the pocket portion 21. (2) Operation The operation of the one-way clutch 1 will be described with reference to FIG. First, when the shaft member 11 rotates relative to the outer ring 12 in the R direction, the roller 13 moves to the R side of the pocket portion 21. Then, the inclined surface 21 a of the pocket portion 21 and the outer peripheral surface of the shaft member 11 are engaged with each other, and the shaft member 11 and the outer ring 1 are engaged.
2 and 2 are locked. As a result, the torque of the shaft member 11 is transmitted to the outer ring 12 via the roller 13.

On the contrary, the shaft member 11 is opposite to the outer ring 12 in the reverse R direction.
When the rollers 13 rotate relative to each other, the roller 13 overcomes the biasing force of the elastic member 14 and moves to the opposite R side of the pocket portion 21.
Then, a gap is formed between the inclined surface 21 a of the pocket portion 21 and the outer peripheral surface of the shaft member 11, and the shaft member 11 and the outer ring 12 are formed.
And become free. As a result, the shaft member 11 idles and torque transmission is cut off.

(3) Manufacturing Method A method of manufacturing the one-way clutch 1 will be described. The method for manufacturing the one-way clutch 1 mainly includes the following steps. Preparation Step In this step, a metal material such as a round bar is cut to prepare a disk-shaped material 31 that will become the outer ring 12 (see FIG. 3).

Preforming Step In this step, the disk-shaped material 31 is cold-pressed so that the disk-shaped material 31 is close to the thickness of the outer ring 12 after molding.
Thin the plate. This makes it possible to reduce the surface streaks and undulations on the skin of the disc-shaped material 31 (see FIG. 4).

Molding process The disk-shaped material 31 is cold-rolled by a die having a shape capable of simultaneously punching the through hole 12a for fitting into the shaft member 11, the plurality of pocket portions 21 and the holding portions 22 and 23. The outer ring 12 is completed by punching (see FIG. 5). The elastic member 14 is incorporated in a position where the inclined surface 21a of the pocket portion 21 of the outer ring 12 is not formed, and then the roller 13 is pushed into the elastic member 14 at a position corresponding to the inclined surface 21a (see FIG. 6). As a result, as shown in FIG.
The roller 13 and the elastic member 14 are held by the holding portions 22 and 23 so as not to slip off to the inner peripheral side of the outer ring 12. Then, finally, the outer ring 12 is fitted onto the outer periphery of the shaft member 11 to complete the one-way clutch 1 (see FIG. 1).

(4) Features The features of the one-way clutch of this embodiment will be described. Reduction of processing man-hours by pressing a disc-shaped material In the method for manufacturing the one-way clutch 1 according to the present embodiment,
Since the outer ring 12 is manufactured by punching using a die (cold press working), the number of working steps can be reduced as compared with the conventional manufacturing method using a plurality of broaches. Further, since the holding portions 22 and 23 can be molded at the same time, the number of processing steps for the outer ring 12 does not increase.

Preventing the rollers and elastic members from slipping out of the pockets In the one-way clutch 1 of this embodiment, as shown in FIG. 7, since the holding portions 22 and 23 are formed on the inner peripheral portion of the outer ring 12, the rollers are formed. The elastic member 13 and the elastic member 14 are held so as not to fall from the pocket portion 21 to the inner peripheral side of the outer ring 12. Therefore, in the assembly process, the outer ring 1
Even when 2 is fitted to the outer circumference of the shaft member 11 arranged in the horizontal direction, the roller 13 and the elastic member 14 do not fall out of the pocket portion 21.

(5) Other Embodiments The embodiments of the present invention have been described above, but the specific configurations are not limited to the above-mentioned embodiments, and can be modified within the scope of the invention. For example, the shape of the holding portion is not limited to this embodiment.

[0019]

In the method for manufacturing a one-way clutch according to the present invention, since the outer ring is manufactured by cold-pressing a disk-shaped material, the number of processing steps can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a one-way clutch according to an embodiment of the present invention.

FIG. 2 is an enlarged view showing the vicinity of the pocket portion of FIG.

FIG. 3 is a diagram illustrating a preparatory process for manufacturing a one-way clutch, showing a side surface of a disc-shaped material.

FIG. 4 is a view for explaining a preforming process for manufacturing a one-way clutch, showing a side surface of a disc-shaped material.

FIG. 5 is a diagram illustrating a molding process of manufacturing a one-way clutch, showing an outer ring.

FIG. 6 is a diagram illustrating an assembly process for manufacturing a one-way clutch, showing a state in which a roller and an elastic member are incorporated in an outer ring.

7 is an enlarged view showing the vicinity of the pocket portion of FIG.

[Explanation of symbols]

1 one-way clutch 11 Shaft member 12 outer ring 12a through hole 13 Roller 14 Elastic member 21 Pocket 22, 23 Holding unit 31 Disc-shaped material

Continued front page    (72) Masatoshi Akagi             1-4-1 Chuo Stock Market, Wako City, Saitama Prefecture             Inside Honda Research Laboratory (72) Inventor Shuichi Ushijima             1500 Hirakawa, Otsu-machi, Kikuchi-gun, Kumamoto             Kumamoto Manufacturing Co., Ltd. (72) Inventor Isamu Azuma             1500 Hirakawa, Otsu-machi, Kikuchi-gun, Kumamoto             Kumamoto Manufacturing Co., Ltd. (72) Inventor Masayoshi Sahashi             1-1-1 Kidahongu, Neyagawa-shi, Osaka             Within EXEDY Corporation

Claims (2)

[Claims] 1. A shaft member, an outer ring having a plurality of pocket portions arranged on an outer peripheral side of the shaft member and recessed toward an outer peripheral side on an inner peripheral surface, and housed in the plurality of pocket portions. A method of manufacturing a one-way clutch including a roller and an elastic member, the method comprising: a preparatory step of preparing a disc-shaped material; After the step and the preforming step, the disk-shaped material is cold-pressed to form a through hole for fitting with the shaft member and the plurality of pocket portions to complete the outer ring. A molding step, incorporating the roller and the elastic member in the pocket portion,
And a step of assembling the outer ring with the shaft member. 2. The outer ring is formed with a holding portion for holding the roller and the elastic member so as not to fall off from the pocket portion to the inner peripheral side of the outer ring.
1. A method for manufacturing a one-way clutch according to.