JP4155693B2 - Assembling method of one-way clutch - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention relates to method of assembling the one-way clutch using rollers as engaging elements.
[0002]
[Prior art]
The one-way clutch using rollers as engaging elements, as shown in FIG. 1 For example, a plurality of recesses 2 with a cam surface 2a which is inclined radially inner surface of the outer ring 1 in the circumferential direction equidistant, a shaft 3 A roller 4 is arranged at a position facing each cam surface 2a between the rollers, and each roller 4 is held by a cage 5 and pressed by a spring 6 in a direction locked by the cam surface 2a. Many.
[0003]
The cage 5 is made of a synthetic resin, and includes an annular portion 7 on both sides and a plurality of pillar portions 8 that connect the annular portions 7, and a roller 4 is provided in each pocket formed by the annular portion 7 and the pillar portion 8. And a spring 6 that presses the roller 4 is mounted on the column portion 8. In addition, a plurality of projections 7 a are formed on the outer diameter surfaces of both annular portions 7, each of these projections 7 a is engaged with the deepest portion of the recess 2 of the outer ring 1, and the cage 5 is engaged with the outer ring 1. It has been stopped.
[0004]
[Problems to be solved by the invention]
In the one-way clutch of the type described above, the deepest part of the recessed part of the outer ring to be engaged and the protrusion of the cage are taken into account in order to facilitate the assembly of the outer ring and the cage, taking into account variations within the tolerances of the dimensions of each part. It is assembled with a gap between the parts. For this reason, during use of the one-way clutch, the cage rotates to change the circumferential phase between the outer ring and the cage. When the phase between the outer ring and the cage changes, the displacement of the spring that presses the roller changes, which causes a problem that the idling torque of the one-way clutch varies in proportion to the pressing force of the spring.
[0005]
Further, as another factor that causes the idling torque to vary, there is a phenomenon that, as shown in FIG. 6, a spring that has just been formed is subjected to a large deformation and does not return to its initial shape when unloaded. This is a generally known phenomenon, and in order to prevent this phenomenon, so-called setting is generally performed in which a deformation amount exceeding the elastic limit is applied to each spring before being incorporated. If this setting step can be omitted, the cost of the spring used can be reduced.
[0006]
An object of the present invention is stable it is idling torque, and is to provide a one-way clutch assembling method Ji is not necessary to pre-setting process the spring incorporated.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a plurality of rollers in a pocket formed by the annular portion and the column portion of a synthetic resin cage in which the annular portions on both sides are connected by a plurality of column portions. The retainer that accommodates the roller is formed on the outer diameter surface of the annular portion of the retainer on the outer ring in which a plurality of concave portions having cam surfaces inclined on the inner diameter surface are provided in the circumferential direction. A plurality of protrusions are engaged with the recesses of the outer ring, and the one-way clutch is assembled by fitting the rollers so that the rollers are pressed in a direction locked by the cam surface by a spring mounted on the pillar. In the assembly method of the one-way clutch, the protrusion of the cage containing the roller is aligned with the recess of the outer ring, the cage is fitted into the outer ring, the outer ring fitted with the cage is fixed, and the large diameter side is the Each robot accommodated in the circumferential direction of the cage The tapered taper shaft formed larger than the diameter of the circle circumscribing the inner circumference of the roller is pushed into the inner circumference of each roller accommodated in these cages, and each roller is moved along the cam surface. Each spring is moved in the direction of compression, and the amount of deformation exceeding the elastic limit is given to each spring, and the cage is rotated by the deformation resistance, so that the protrusion of the cage becomes the recess of the outer ring. It was made to collide.
[0008]
That is, in a state where each roller and cage are incorporated in the outer ring, a large deformation amount exceeding the elastic limit is given to each spring, and the cage is rotated by the deformation resisting force, so that the outer diameter surface of the annular portion of the cage is The formed protrusions are brought into contact with the recesses of the outer ring without any gaps, thereby eliminating the phase change between the outer ring and the cage during use of the one-way clutch, and making it possible to omit the spring setting step.
[0009]
FIG. 5 shows various levels of the circumscribed circle on the inner circumferential side of the roller by pushing the taper shaft into the inner circumferential side of each roller accommodated in the circumferential direction of the cage with each roller and the cage assembled in the outer ring. The results of measuring the idling torque of these enlarged one-way clutches are shown. It can be seen that the idling torque decreases remarkably with a slight expansion amount, and then gradually decreases as the expansion amount increases. This is because in the region where the amount of diameter expansion is small, the gap between the deepest part of the recess of the outer ring and the protrusion of the cage is reduced, and the protrusion comes into contact with the deepest part of the recess. Thereafter, the amount of deformation exceeding the elastic limit of the spring gradually increases as the diameter expansion amount increases. Therefore, the idling torque of the one-way clutch can be reliably stabilized by a slight diameter increase that allows the protrusion of the cage to abut the deepest part of the recess of the outer ring.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. By the assembly method of the present invention, the one-way clutch incorporated in the fishing reel shown in FIG. 1 was assembled. As described above, this one-way clutch is provided with a plurality of concave portions 2 having cam surfaces 2a inclined on the inner diameter surface of the outer ring 1 in the circumferential direction, and each cam between the rotary shaft 3 of the fishing reel. Rollers 4 are arranged at positions facing the surface 2 a, and each of these rollers 4 is held by a cage 5 and pressed by a spring 6 in a direction to be locked by the cam surface 2 a. The outer ring 1 is formed by drawing using chromium molybdenum steel as a raw material, and a hardened layer formed by carburizing and quenching is formed on the surface thereof to a depth of about 0.1 mm. A protrusion 9 extending in the axial direction is formed on the outer diameter surface of the outer ring 1, and this protrusion 9 is engaged with a recess 10 a provided on the inner diameter surface of the fishing reel 10 indicated by a one-dot chain line in FIG. 1. The outer ring 1 is locked to the fishing reel 10.
[0011]
The cage 5 is made of a synthetic resin, and includes an annular portion 7 on both sides and a plurality of pillar portions 8 that connect the annular portions 7, and a roller 4 is provided in each pocket formed by the annular portion 7 and the pillar portion 8. And a spring 6 that presses the roller 4 is mounted on the column portion 8. In addition, a plurality of projections 7 a are formed on the outer diameter surfaces of both annular portions 7, each of these projections 7 a is engaged with the deepest portion of the recess 2 of the outer ring 1, and the cage 5 is engaged with the outer ring 1. It has been stopped.
[0012]
Below, the assembly method of this one-way clutch is demonstrated based on FIG. 2 thru | or FIG. First, the spring 6 that has been molded and has not been set is mounted on the column portion 8 of the cage 5, the rollers 4 are accommodated in the pockets of the cage 5, and the cage 5 that accommodates the rollers 4 is attached. As shown in FIG. 2, the protrusions 7 a of the cage 5 are directed to the concave portions 2 of the outer ring 1 so that each roller 4 is pressed in the direction locked by the cam surface 2 a by the spring 6 attached to the column portion 8. Fit into the outer ring 1 to match.
[0013]
Next, as shown in FIG. 3, the outer periphery of the outer ring 1 is fixed to the fixing jig 11, and the inner periphery side of each roller 4 accommodated in the circumferential direction of the cage 5 indicated by a one-dot chain line in FIG. 2. A tapered taper shaft 13 having a base end larger than the diameter of the circumscribed circle 12 is inserted into the inner peripheral side of each roller 4. The tip end side of the taper shaft 13 is formed smaller than the diameter of the circumscribed circle 12.
[0014]
Finally, as shown in FIG. 4, the taper shaft 13 is pushed in, and each roller 4 is pressed by the taper shaft 13 to move each spring 6 along the cam surface 2 a in the direction of compressing the spring 6. Deformation exceeding the elastic limit is applied, and the cage 5 is rotated by the deformation resistance, so that the protrusion 7 a of the cage 5 is brought into contact with the deepest portion of the recess 2 of the outer ring 1.
[0015]
As a result of measuring the idling torque of several one-way clutches assembled in this way, a stable idling torque of 15 gf · cm or less was obtained. On the other hand, although the taper shaft was not pushed in as in the conventional case, the idling torque was about 28 gf · cm.
[0016]
【The invention's effect】
According to the present invention , the protrusion of the cage containing each roller is aligned with the concave portion of the outer ring, the cage is fitted into the outer ring, and the large diameter side is formed larger than the diameter of the circle circumscribing the inner peripheral side of each roller. A tapered taper shaft is pushed into the inner peripheral side of each roller, the amount of deformation exceeding the elastic limit is given to each spring, the cage is rotated by its deformation resistance, and formed on the outer diameter surface of the annular portion of the cage. Since the protrusion is abutted with the recess of the outer ring without any gap, the setting step of the spring to be incorporated can be omitted, and a one-way clutch with stable idling torque can be easily assembled.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view showing the structure of a one-way clutch in which the assembling method of the present invention is implemented . FIG. 2 is an enlarged front view of a main part for explaining the first procedure of the one-way clutch assembling method of FIG . Figure 3 shows essential for explaining the third step of the second part cutaway front view Figure 4 method of assembling the one-way clutch of Figure 1 illustrating the procedure of assembling process of the one-way clutch of Figure 1 Fig. 5 is a graph showing the relationship between the amount of diameter expansion and idling torque. Fig. 6 is a graph showing the deformation characteristics of the spring.
DESCRIPTION OF SYMBOLS 1 Outer ring 2 Recessed part 2a Cam surface 3 Shaft 4 Roller 5 Cage 6 Spring 7 Annular part 7a Projection part 8 Column part 9 Projection 10 Reel 10a Recessed part 11 Jig 12 circumscribed circle 13 Tapered shaft

Claims (1)

  A cage made of synthetic resin in which the annular portions on both sides are connected by a plurality of column portions, a plurality of rollers are accommodated in a pocket formed by the annular portion and the column portions, and a cage that accommodates the rollers, Engage a plurality of protrusions formed on the outer diameter surface of the annular portion of the cage with the recesses of the outer ring on the outer ring having a plurality of recesses having cam surfaces inclined to the inner diameter surface in the circumferential direction. In the assembly method of the one-way clutch, the rollers are accommodated in the one-way clutch assembly method in which each roller is fitted so as to be pressed in a direction locked by the cam surface by a spring mounted on the column portion. Align the protruding part of the cage with the recess of the outer ring, fit the cage into the outer ring, fix the outer ring fitted with this cage, and fix the outer diameter of each roller accommodated in the circumferential direction of the cage Larger than the diameter of the circle circumscribing the inner circumference The tapered taper shaft formed in this way is pushed into the inner peripheral side of each roller accommodated in these cages, and each roller is moved along the cam surface in the direction of pushing and contracting each of these rollers. One direction characterized in that the amount of deformation exceeding the elastic limit is given to each spring, and the retainer is rotated by the deformation resisting force so that the protrusion of the retainer abuts the recess of the outer ring. How to assemble the clutch.

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