JPH09264333A - Roller assembly jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently perform the work to assemble a roller into a plurality of pocket in an inner diameter surface of a body of revolution. SOLUTION: A roller push-out member 12 is fitted to a roller holding shaft 11 movably in the axial direction, and roller holding grooves are provided on a tip part of the roller holding shaft 11 with the prescribed intervals in the circumferential direction, an air suction hole 22 is provided in a groove bottom of the roller holding groove 15, and a roller 3 sucked to the roller holding groove 15 is pushed out into a pocket 6 to be assembled such as an outer ring 1 by the roller push-out member 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for incorporating a roller into a rotating body such as an outer ring of a one-way clutch incorporating the roller.

[0002]

2. Description of the Related Art The applicant has previously filed a patent application for a small one-way clutch used for office equipment and the like, which has improved performance and reduced cost (Japanese Patent Application No. 7-83200).
-252511).

As shown in FIGS. 4 and 5, the one-way clutch according to this patent application comprises an outer ring 1, a ring spring 2, rollers 3, a case 4 and a lid 5. The ring spring 2 has a required number of spring pieces 7 to be inserted into each pocket 6 on the inner diameter surface of the outer ring 1.

In the one-way clutch having the above structure, since the spring piece 7 is in the form of the ring spring 2, the assembling work for inserting the spring piece 7 into each pocket 6 of the outer ring 1 is easy and the spring piece. The roller 3 can be inserted along the folded-back piece 8 at the tip of the assembly 7, so that the assembly is facilitated and the intended purpose can be achieved.

[0005]

However, in the above-described assembling work, the work of inserting the roller 3 into the pocket 6 is currently performed manually. Since the one-way clutch for office equipment has a small diameter of the rotary shaft on which it is mounted, the size of the roller is also small, so that it is difficult and inefficient to manually assemble it.

Although the one-way clutch for office equipment has been described above, the same applies to a small-sized rotating body incorporating a plurality of rollers such as a small-sized roller bearing.

Therefore, an object of the present invention is to provide an assembling jig capable of efficiently incorporating the rollers into the rotating body when assembling the rotating body incorporating the plurality of rollers as described above.

[0008]

In order to achieve the above-mentioned object, the present invention fits a roller pushing member having an annular pushing surface on the outer circumference of a roller holding shaft so as to be movable in the axial direction,
Axial roller holding grooves are provided on the outer peripheral surface of the tip end portion of the roller holding shaft protruding from the roller pushing surface at regular intervals in the circumferential direction, and the tip end side of the roller holding groove is opened to the end surface of the roller holding shaft. At the same time, a suction hole is provided in the groove bottom of the roller holding groove, and the suction hole is communicated with the air passage inside the roller holding shaft.

In the jig having the above construction, the air passage of the roller holding shaft is connected to an external vacuum pump, and the tip portion of the holding shaft is inserted into a container in which a large number of rollers are randomly stored to perform suction. . Then, in the vicinity of the roller holding groove, the rollers oriented along the holding groove are sucked and fit into the holding groove. In this way, the rollers are taken out from the container while being sucked into the holding grooves.

Next, the pockets of the rotary shaft and the holding grooves are aligned in phase, the tip of the roller holding shaft is brought close to the open end of the inner diameter surface of the rotating body, and the roller pushing member is moved in the tip direction. Is pushed out and inserted into each pocket.

When a guide portion is provided at the tip of the roller holding shaft so as to be fitted into the inner diameter surface of the rotating body, the guide portion is inserted into the inner diameter surface of the rotating body to position the rotating body relative to the roller holding shaft. Can be stabilized.

Further, when a biasing force for moving the roller pushing member toward the rear end is applied to the roller pushing member, the roller pushing member is automatically driven by the pushing force after the insertion of the roller is completed as described above. Can be restored to the original state.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The assembly jig of this embodiment is
The roller 3 is incorporated in the pocket 6 of the outer ring 1 of the one-way clutch described above, and as shown in FIGS.
This assembly jig has a fitting structure in which a roller holding shaft 11 and a roller pushing member 12 are fitted together.

The roller holding shaft 11 has a guide portion 14 formed at a tip end portion thereof with a stepped portion 13 having a smaller diameter. The guide portion 14 has a diameter that matches the inner diameter surface of the outer ring 1.

Axial roller holding grooves 15 are formed at regular intervals in the circumferential direction behind the stepped portion 13.
The roller holding grooves 15 are formed at the same intervals as the pockets 6 according to the number of pockets 6 of the outer ring 1. The tip of each roller holding groove 15 reaches the step portion 13 and is opened.

A circumferential rib 16 is formed behind the portion where the roller holding groove 15 is formed, and a tip end of the cylindrical roller pushing member 12 fitted to the outer peripheral surface of the roller holding shaft 11 is provided. The inward flange 17 engages with the rib 16 and restricts its rearward movement.

A coil spring 18 is inserted into a space between the inner diameter surface of the roller pushing member 12 and the outer diameter surface of the holding shaft 11, and one end of the coil spring 18 is pressed against the rib 16. The other end of the coil spring 18 has a sleeve 1 fitted to the inner diameter surface of the rear end of the roller pushing member 12.
It is pressed against 9.

The roller pushing member 12 is the sleeve 1 described above.
9 and an inward flange 17 slide on the roller holding shaft 11 and are normally urged rearward by the coil spring 18, and the inward flange 17 engages with the rib 16.
In this state, there is a slight gap between the surface on the front end side of the inward flange 17, that is, the roller pushing surface 21 and the rear end of the roller holding groove 15.

Suction holes 22 are provided at the groove bottoms of the roller holding grooves 15, and the suction holes 22 are provided in the roller holding shaft 1.
It communicates with the air passage 23 provided at the center of the No. 1.

The roller assembly jig of the embodiment is as described above, and the air passage 23 of the roller holding shaft 11 is connected to the vacuum pump. Although it can be manually handled by an operator as it is, it can be attached to an assembly machine and used as an automatic assembly jig.

In any case, when the rollers 3 are assembled into the outer ring 1, the tip of the roller holding shaft 11 is inserted into a container in which a large number of rollers 3 are randomly stored and vacuum suction is performed. As a result, the roller having a posture orthogonal to the roller holding groove 15 has insufficient suction force and is not sucked, but the roller having a posture along the roller holding groove 15 is sucked.

When the suction is completed in this way, it is confirmed that all the rollers 3 have been sucked in the roller holding grooves 15, and then the position of the outer ring 1 is adjusted and the pockets 6 of the outer ring 1 are aligned. However, the phase of the holding groove 15 is matched. In this case, the ring spring 2 is fitted to the outer ring 1 in advance and the spring piece 7 is inserted into each pocket 6.

After that, the roller holding shaft 11 and the outer ring 1 are relatively moved in the axial direction, and the guide portion 14 is inserted into the inner diameter surface of the outer ring 1 to stabilize the positional relationship of the outer ring 1. Next, when the roller pushing member 12 is moved in the direction of the outer ring 1 by a manual operation of an operator or the action of an actuator of an automatic assembly machine, the coil spring 18 is compressed and the roller pushing surface 21 pushes the roller 3 out. Then, it moves to the pocket 6 of the outer ring 1 and the assembling of the roller 3 is completed.

The guide portion 14 provided at the tip of the roller holding shaft 11 is omitted if the positional relationship between the roller holding shaft 11 and the outer ring 1 is stable, and the portion of the stepped portion 13 is omitted. May be the tip surface. When the roller pushing member 12 is reciprocally moved by the actuator, the coil spring 18 may be omitted. In that case, inward facing brim 1
A roller push-out member can be configured by an annular body corresponding to the portion 7 and can be reciprocated by an actuator.

[0025]

As described above, according to the present invention, the required number of rollers can be automatically or semi-automatically incorporated into the pocket of the rotating body at a time, and the work efficiency of incorporating the rollers can be improved. As a result, the cost of the product can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment in use.

[FIG. 2] (a) Sectional view of the same as above. (B) Sectional view of the same as above when the rollers are assembled.

FIG. 3 is an enlarged sectional view taken along line III-III of FIG.

FIG. 4 is an exploded perspective view of a one-way clutch.

FIG. 5 is a partially enlarged sectional view of the above.

[Explanation of symbols]

 1 Outer ring 2 Ring spring 3 Roller 4 Case 5 Lid 6 Pocket 7 Spring piece 8 Folding piece 11 Roller holding shaft 12 Roller pushing member 13 Step portion 14 Guide portion 15 Roller holding groove 16 Rib 17 Collar 18 Coil spring 19 Sleeve 21 Roller pushing surface 22 Suction hole 23 Air passage

Claims (4)

[Claims] 1. A roller pushing member having an annular pushing surface on the outer circumference of a roller holding shaft is movably fitted in the axial direction, and the tip end outer circumferential surface of the roller holding shaft protruding from the roller pushing surface is axially fitted to the roller holding shaft. Roller holding grooves are provided at regular intervals in the circumferential direction, the tip end side of the roller holding groove is opened to the end surface of the roller holding shaft, and a suction hole is provided at the groove bottom of the roller holding groove. A roller assembly jig that is connected to the air passage inside the roller holding shaft. 2. The roller assembly jig according to claim 1, wherein a guide portion that is fitted into the inner diameter surface of the rotating body is provided at the tip of the roller holding shaft. 3. The roller assembly jig according to claim 1, wherein the roller pushing member is provided with a biasing force for moving the roller pushing member toward the rear end direction. 4. The roller pushing member is formed into a cylindrical shape,
A coil spring is inserted into a gap between the roller pushing member and the holding shaft, both ends of which are engaged with the roller pushing member and the holding shaft, respectively, and the roller pushing member is biased toward the rear end thereof. Item 3. A roller assembly jig according to item 3.