JPH0637634U - Spring for one-way clutch - Google Patents

Abstract

(57) [Abstract] [Purpose] The shape of the contact portion of the spring that urges the cylindrical roller of the one-way clutch toward the inclined cam surface of the outer ring has been improved, resulting in vibration of the spring when a moment load is applied. This is to prevent the generation of abnormal noise. [Structure] Cylindrical roller 8 of pressing piece 10 formed on spring 9
The contact portion 17 with respect to is formed in a flat surface so as to be in line contact with the cylindrical roller 8.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a spring used to bias a cylindrical roller of a one-way clutch.

[0002]

[Prior art]

 As a conventionally known one-way clutch, there is one shown in FIGS. 5 to 7 (see Japanese Utility Model Laid-Open No. 1-94632). In this one-way clutch, inclined cam surfaces 2 are formed on the inner peripheral surface of the outer ring 1 at regular intervals, and a retainer 3 is fitted on the inner peripheral surface of the outer ring 1. The cage 3 has ring portions 4 on both sides, and axial column portions 5 connecting the ring portions 4 are integrally provided at the same intervals as the inclined cam surface 2 and the column portions 5 are formed. There are pockets 6 between each other. A protrusion 7 is formed on the outer peripheral surface of the ring portion 4 so as to be fitted on the inclined cam surface 2, whereby the retainer 3 is prevented from rotating with respect to the outer ring 1.

A cylindrical roller 8 is fitted in the pocket 6 described above, and a pressing piece 10 of a spring 9 locked to the column portion 5 is brought into contact with the cylindrical roller 8 so that the cylindrical roller 8 faces the inclined cam surface 2. I'm on the rise.

The above-described one-way clutch is fitted around the shaft 11, and the clutch is engaged in the clockwise direction of the shaft 11 (see the arrow in FIG. 5) and is disengaged in the counterclockwise direction.

[0005]

[Problems to be solved by the device]

 In the actual use of the one-way clutch as described above, when a moment load is applied to the one-way clutch, an abnormal noise such as a rubbing noise may be generated from the one-way clutch.

As a result of investigating the cause thereof, the pressing piece 10 of the spring 9 in the conventional one-way clutch is inclined with respect to the cylindrical roller 8 as shown in FIG. 7, and the corner portion in contact with the cylindrical roller 8 is Point contact with the outer peripheral surface of the cylindrical roller 8.

If the contact of the pressing piece 10 with the cylindrical roller 8 is point contact as described above, the attitude of the spring 9 with respect to the cage 3 tends to be unstable. Therefore, it is considered that the spring 9 vibrates when a moment load is applied, and the vibration causes the abnormal noise.

Therefore, an object of the present invention is to solve the above problems by improving the shape of the pressing piece 10 of the spring 9.

[0009]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention forms a contact portion of the pressing piece of the spring for the cylindrical roller by a plane parallel to the central axis of the cylindrical roller, and makes contact with the cylindrical roller in line contact. Is adopted.

[0010]

[Action]

 With the above configuration, the contact state of the pressing piece of the spring with the cylindrical roller is stabilized.

[0011]

【Example】

 As shown in FIGS. 1 and 2, the structure of the one-wake latch in which the spring 9 according to the present invention is used is the same as that of the conventional one. Therefore, the same parts as those in FIGS. The description is omitted here.

The structure of the cage 3 shown in FIG. 2 is not different from the conventional structure, but the detailed structure thereof is not shown in FIGS. 5 to 7, and therefore the description will be given based on FIG. That is, in the central portion of one surface of the column portion 5 of the cage 3, a protruding portion 12 is formed which is inclined in the direction of narrowing the opening of the pocket 6 and thereby prevents the cylindrical roller 8 from slipping inward.

Spring protrusions 13 having a smaller protrusion amount are formed on both sides of the protrusion 12.

The spring 9 is formed of a thin metal plate, and has a main plate portion 14 mounted on the outer surface of the pillar portion 5 and a pair of locking portions 15 along one side of the main plate portion 14. The locking portions 15 are spaced from each other by the length of the protruding portion 12, and the locking portions 15 correspond to the positions of the spring locking protrusions 13.

In addition, a support portion 16 that is bent inward along the surface of the column portion 5 is formed at the center of the other side of the main plate portion 14, and the pressing pieces 10 are formed on both sides of the support portion 16. To be done. Each pressing piece 10 extends toward the end portion of the main plate portion 14 with an inclination angle that gradually separates from the main plate portion 14.

In the conventional case, as described above, the pressing piece 10 was terminated with the above-mentioned inclination angle (see FIG. 7). The main plate portion 14 is bent so as to be parallel to one side, and a contact portion 17 having a plane parallel to the central axis of the cylindrical roller 8 is formed.

When the spring 9 having the above-described structure is fitted to the pillar portion 5 of the cage 3, the pillar portion 5 is sandwiched by the respective locking portions 15 and the supporting portions 16 from both sides, and the locking portion 15 is a spring of the pillar portion 5. It is elastically locked to the locking projection 13. Further, the contact portion 17 of the pressing piece 10 contacts the cylindrical roller 8 and urges the cylindrical roller 8 against the inclined cam surface 2.

Since the contact portion 17 is formed on a plane parallel to the central axis of the cylindrical roller 8 as described above, the contact portion 17 makes a line contact with the cylindrical roller 8.

As another means for making the tip end portion of the pressing piece 10 linearly contact the cylindrical roller 8, as shown in FIG. 4, a chamfered portion 18 is formed at the corner portion of the tip end portion of the pressing piece 10. May be. The chamfered portion 18 is formed by a plane parallel to the central axis of the cylindrical roller 8 and is in line contact with the cylindrical roller 8.

[0020]

[Effect of device]

 As described above, the present invention relates to the pressing piece of the spring for urging the cylindrical roller of the one-way clutch toward the inclined cam surface, and the pressing piece is in line contact with the cylindrical roller. Therefore, the posture of the spring is stable even when a moment load is applied when the one-way clutch is actually used. Therefore, it is possible to prevent the generation of abnormal noise such as rubbing noise in the one-way clutch.

[Brief description of drawings]

FIG. 1 is a partially omitted cross-sectional view of a working state of an embodiment.

FIG. 2 is a partially exploded perspective view of the above.

FIG. 3 is a partial plan view of the above.

FIG. 4 is a partial plan view of the above modification.

FIG. 5 is a partially cutaway vertical front view of the related art.

FIG. 6 is a partially omitted vertical side view of the above.

FIG. 7 is a partial plan view of the above.

[Explanation of symbols]

 1 Outer ring 2 Inclined cam surface 3 Retainer 4 Ring part 5 Column part 6 Pocket 7 Protrusion 8 Cylindrical roller 9 Spring 10 Pressing piece 11 Shaft 12 Projection part 13 Protrusion 14 Main plate part 15 Locking part 16 Support part 17 Contact part 18 Chamfer part

Claims (1)

[Scope of utility model registration request] 1. A cylindrical roller is accommodated in a pocket of a retainer fitted on the inner peripheral surface of an outer ring, and a spring is locked to an axial pillar portion forming the pocket of the retainer, and a pressing force is provided on the spring. In the spring used in a one-way clutch that biases the cylindrical roller toward the inclined cam surface of the inner peripheral surface of the outer ring by bringing the piece into contact with the cylindrical roller, the contact portion of the pressing piece with the cylindrical roller is A spring for a one-way clutch, which is formed by a plane parallel to the central axis of the cylindrical roller, and is in line contact with the cylindrical roller.