JP2004232734A - Retainer of one-way clutch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a retainer of a one-way clutch with good assemblability. <P>SOLUTION: In this retainer 1 of the one-way clutch, when a cylindrical engagement roller 20 is inserted into a pocket 6 adjoining a coil spring 21 from an outer side to an inner side in the radial direction, an insertion position of the cylindrical engagement roller 20 in the circumferential direction can be determined by using a top part 13 approximately at an vertex of a regular decagonal column shape of an outer peripheral surface 3A of an axial end 3, as a mark. Consequently, the assemblability of the cylindrical engagement roller 20 can be improved. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a one-way clutch retainer.
[0002]
[Prior art]
When assembling the one-way clutch, the retainer incorporates engaging rollers and springs for biasing the engaging rollers, but the engaging rollers and springs are incorporated into pockets arranged in the circumferential direction of the retainer in order. It was necessary and it took time to mount the parts in the cage pockets. Further, when the retainer is mounted on the inner ring having the cam surface on the outer periphery, it takes time and effort to perform circumferential alignment for aligning the inner peripheral surface of the retainer with the cam surface of the inner ring, thereby improving the assembling property. Did not.
[0003]
[Patent Document 1]
JP 2001-140943 A
[Problems to be solved by the invention]
Therefore, an object of the present invention is to provide a one-way clutch retainer with good assemblability.
[0005]
[Means for Solving the Problems]
To achieve the above object, a one-way clutch retainer according to claim 1, wherein the one-way clutch retains an engagement roller between an inner ring having a cam surface on an outer periphery and an outer ring having a circumferential surface on an inner periphery. The retainer of
One axial end has an inner peripheral surface having a shape corresponding to the cam surface of the inner race, and the other axial end has an outer peripheral surface having a substantially polygonal column shape.
[0006]
In the retainer of the one-way clutch according to the first aspect of the present invention, the top of the outer peripheral surface of the substantially polygonal prism shape of the other axial end serves as a mark for determining the assembling position of the engagement roller. Therefore, the assemblability of the engagement rollers can be improved.
[0007]
Also, when assembling the retainer to the inner ring, the top of the outer peripheral surface of the substantially polygonal column shape at the other axial end is formed with the inner peripheral surface of the one axial end at the outer periphery of the inner ring. This mark serves as a mark for positioning in the circumferential direction so as to be aligned with the cam surface. Therefore, the assemblability of the one-way clutch can be improved.
[0008]
According to a second aspect of the present invention, in the retainer of the one-way clutch according to the first aspect, the outer peripheral surface of the other axial end has a substantially normal position where a position for holding the engagement roller is substantially a vertex. It is characterized by a polygonal pillar shape.
[0009]
In the retainer for a one-way clutch according to the second aspect of the present invention, the outer peripheral surface of the other axial end has a substantially regular polygonal column shape having a position at which the engagement roller is retained as a substantially apex. At the engaging roller holding position, the radial thickness of the other axial end can be maximized, the area of the portion that supports the engaging roller in the axial direction can be increased, and the holding force of the engaging roller can be reduced. Can be improved.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail based on the illustrated embodiment.
[0011]
FIG. 1C shows a one-way clutch retainer 1 as an embodiment of the present invention viewed from one side in the axial direction to the other side, and FIG. From one side to the other. FIG. 1B illustrates a cross section taken along line AA ′ of FIG.
[0012]
As shown in FIG. 1 (B), the retainer 1 has one axial end 2 and the other axial end 3, and between the axial end 2 and the axial end 3. Are formed at predetermined intervals in the circumferential direction. A pocket 6 is formed between the adjacent pillar portions 5, and the cage 1 has ten pockets 6. The column portion 5 has a spring guide 8 protruding in the circumferential direction substantially at the center in the axial direction. In this embodiment, the cage 1 is made of resin, but may be made of metal or ceramic.
[0013]
As shown in FIG. 1C, the one axial end 2 has an inner peripheral surface 2A having a substantially regular decagonal prism shape. The axial end 2 has a cylindrical outer peripheral surface 2B. The axial end 2 has an outer peripheral edge 7 that is recessed radially inward and axially inward. The axial end 2 has ten trapezoidal holes 10 at circumferential positions corresponding to the spring guides 8. The trapezoidal hole 10 is formed in an axially outer end face 2 </ b> C of the axial end 2. As shown in FIG. 1B, the end surface 2C of the axial end portion 2 is a tapered surface 11 in which the inner peripheral edge increases in diameter toward the outside in the axial direction.
[0014]
As shown in FIG. 1 (A), the other axial end 3 has an outer peripheral surface 3A having a substantially regular octagonal prism shape, and a slightly curved top portion at a vertex portion of the regular octagonal prism shape. The position of 13 is the arrangement position of the engagement roller 20. The outer diameter of the outer peripheral surface 3A of the axial end 3 is smaller than the outer diameter of the outer peripheral surface 2B of the axial end 2. The inner peripheral surface 3B of the axial end 3 is cylindrical and has a smaller diameter than the inner peripheral surface 2A of the axial end 2.
[0015]
In the cage 1 having the above configuration, first, as shown in FIG. 2, a coil spring 21 is mounted on the spring guide 8 of the column 5.
[0016]
Next, the cylindrical engagement roller 20 is inserted into the pocket 6 from the outside in the radial direction to the location adjacent to the coil spring 21. At this time, the insertion position of the cylindrical engaging roller 20 in the circumferential direction can be determined by using the top 13 of the substantially apex of the regular decagonal prism on the outer peripheral surface 3A of the axial end 3 shown in FIG. it can. Therefore, the assemblability of the cylindrical engagement roller 20 can be improved.
[0017]
Further, in the retainer 1 of the one-way clutch of this embodiment, the outer peripheral surface 3A of the other axial end portion 3 is a substantially regular octagonal prism having a position where the cylindrical engagement roller 20 is retained as a position of the top portion 13. Due to the shape, the radial thickness of the other axial end 3 can be maximized at the position where the cylindrical engaging roller 20 is held, and the end surface 20A of the cylindrical engaging roller 20 is axially supported. , The holding force of the cylindrical engagement roller 20 can be improved.
[0018]
As shown in FIG. 2, the one-way clutch 30 in which the coil spring 21 and the cylindrical engagement roller 20 are incorporated in the retainer 1 has a substantially regular decagonal pillar-shaped cam surface 31 </ b> A provided on the outer periphery of the inner race 31. Along the tapered surface 11 of one of the axial ends 2, the inner peripheral surface 2A of the substantially regular decagonal prism shape of the axial end 2 is inserted and fitted from one side in the axial direction. At the same time, the cylindrical outer peripheral surface 2B of the axial end portion 2 and the substantially regular octagonal prism-shaped outer peripheral surface 3A of the axial end portion 3 are inserted into the cylindrical inner peripheral surface 32A that the outer ring 32 has on the inner periphery. .
[0019]
As described above, when assembling the one-way clutch 30 to the inner race 31, the top 13 of the substantially apex of the outer peripheral surface 3A of the substantially regular decagonal prism of the other axial end 3 of the retainer 1 is in the circumferential direction. Aligning the substantially regular decagonal inner surface 2A of the one axial end 2 with the substantially regular decagonal cam surface 31A of the outer periphery of the inner ring 31. Can be easily inserted. Therefore, the assemblability of the one-way clutch can be improved.
[0020]
Thus, the one-way clutch 30 assembled between the outer race 32 and the inner race 31 allows the inner race 31 to rotate the outer race 32 in the counterclockwise direction indicated by the arrow B, while the inner race 31 indicates the rotation indicated by the arrow C. When the outer ring 32 tries to rotate in the clockwise direction, the outer ring 32 is rotated with respect to the inner ring 31 by the wedge action of the cylindrical engagement roller 20 between the inner peripheral surface 32A of the outer ring 32 and the cam surface 31A of the inner ring 31. Relative rotation becomes impossible.
[0021]
In the above-described embodiment, the retainer 1 which is adapted to the case where the cam surface 31A of the inner race 31 has a substantially regular decagonal prism shape is described, and is adapted to the shape of the substantially regular decagonal cam shape 31A on the outer periphery of the inner race 31. Thus, the inner peripheral surface 2A of one axial end portion 2 has a substantially regular decagonal prism shape, but the cam surface of the inner ring may have a substantially regular decagonal prism shape, a substantially regular octagonal prism shape, or other regular polygonal shapes. It is a matter of course that the retainer of the present invention can be applied to a prism shape, and even a polygonal shape other than a regular polygonal shape. That is, the shape of the inner peripheral surface 2A of the one axial end portion 2 may be a regular polygonal column shape corresponding to the cam surface of the inner ring or a polygonal column shape other than the regular polygonal column shape.
[0022]
The outer peripheral surface 3A of the other axial end 3 has a polygonal column shape corresponding to the number of angles of the inner peripheral surface 2A of one axial end 2 of the polygonal column shape corresponding to the cam surface of the inner ring. do it. As described above, the outer peripheral surface 3A of the substantially polygonal column shape of the other axial end 3 has a substantially polygonal shape cut by a plane perpendicular to the axis, and the top of the outer peripheral surface may be used as a mark for circumferential positioning. It is possible.
[0023]
【The invention's effect】
As is apparent from the above description, in the cage of the one-way clutch of the present invention, the top of the outer peripheral surface of the substantially polygonal column shape of the other axial end serves as a mark for determining the mounting position of the engagement roller. Therefore, the assemblability of the engagement rollers can be improved.
[0024]
Also, when assembling this retainer to the inner ring, the top of the outer peripheral surface of the substantially polygonal column shape at the other axial end, the inner peripheral surface of the one axial end has a cam on the outer periphery of the inner ring. It can be used as a mark for positioning in the circumferential direction with respect to the surface, and the assemblability of the one-way clutch can be improved.
[Brief description of the drawings]
FIG. 1A is a side view showing an embodiment of a retainer of a one-way clutch of the present invention viewed from one side in the axial direction to the other side, and FIG. 1B is a side view showing FIG. 1) is a cross-sectional view taken along the line AA ′, and FIG. 1 (C) is a side view showing the above embodiment viewed from one side in the axial direction.
FIG. 2 is a half sectional view showing a state in which a one-way clutch including a retainer according to the embodiment is incorporated between an inner ring and an outer ring.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cage 2 One axial end 2A Inner peripheral surface 2B Outer peripheral surface 3 The other axial end 3A Outer peripheral surface 3B Inner peripheral surface 5 Column 6 Pocket 8 Spring guide 13 Top 20 Cylindrical engaging roller 21 Coil spring 30 One Direction clutch 31 Inner ring 31A Cam surface 32 Outer ring 32A Inner peripheral surface

Claims (2)

An inner ring having a cam surface on an outer periphery, and a retainer of a one-way clutch for holding an engagement roller between an outer ring having a circumferential surface on an inner periphery,
The one axial end has an inner peripheral surface having a shape corresponding to the cam surface of the inner race, and the other axial end has an outer peripheral surface having a substantially polygonal column shape. Clutch retainer. The retainer for the one-way clutch according to claim 1,
A retainer for a one-way clutch, wherein an outer peripheral surface of the other axial end has a substantially regular polygonal prism shape having a position at which the engagement roller is retained at a substantially apex.

Images