JPH08338450A - Roller type one-way clutch - Google Patents

Abstract

PURPOSE: To make improvements in assembling operability without increasing in manhours for assembling a one-way clutch by installing a projection, projecting axial outward from a surface formed by each axial end face of plural pieces of roller members, in the axial end face of a pad bearing. CONSTITUTION: One end in the axial direction of a pad bearing 10 is provided with a projection 10a projecting axial outward from a surface C formed by each axial end face of plural pieces of roller members 15. This projection 10a extends axial outward as far as length D in the insertional direction of an inner ring 2. Therefore, this length D comes to its insertional allowance at a time when the inner ring 2 is assembled in a one-way clutch 30, so before the inner ring 2 comes into contact with these plural rollers 15, it contacts with the projection 10a of the pad bearing 10, Accordingly, it is recommeneded to overcome any difficult to assemble deriving from such a fact that many of these rollers 15 existing in the circumferential direction are not uniformly shifted in the racing direction, and further, it is unnecessary to use any special assembling jigs therefore.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller type one-way clutch used as a component for torque transmission, backstop, etc. in a drive unit of, for example, an automobile or an industrial machine. The present invention relates to a roller type one-way clutch that can be easily attached.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 6, a roller type one-way clutch includes an outer ring 10, an inner ring 20 arranged concentrically with the outer ring 10, an outer peripheral surface of the inner ring 20 and an inner peripheral cam surface 90 of the outer ring 10. A plurality of rollers 50, a pad bearing 100 having a U-shaped cross section for centering the outer ring 10 and the inner ring 20 and guiding the rollers 50, and a spring 70 contacting the idle side of the rollers 50. , Spring 7
It consists of zero mounting plate 80. The roller 50 is prevented from falling off in the axial direction by the side plate 60.

In such a structure, the one-way clutch is configured to rotate the inner ring 20 in only one direction with respect to the outer ring 10 by the cam mechanism composed of the roller 50 and the cam surface 90. That is, the inner ring 20 idles with respect to the outer ring 10 in the direction of arrow Z in FIG. 6, and imparts rotational torque to the outer ring 10 via the cam mechanism only in the opposite direction.

The pad bearing 100 guides the roller 50 and centers the inner ring 20 with respect to the outer ring 10. The axial end faces of the pad bearing 100 and the roller 50 are flush, that is, the same face. It is above.

The pad bearing 100 is assembled to the one-way clutch, especially to the inner ring 20, as follows.

FIG. 7 shows a state before the inner ring 20 is assembled, but the roller 50 is pressed to the meshing side by the spring 70, and the inner ring 20 of the pad bearing 100 is pressed.
The diameter B of the inscribed circle with respect to the inner ring 20 of the roller 50 is smaller than the diameter A of the inscribed circle with respect to.

In this state, when the inner ring 20 is inserted in the axial direction, the inner ring 20 comes into contact with the roller 50.
The inner ring 20 or the outer ring 10 on the idling side (Fig. 7).
It must be pushed in while rotating in the direction of arrow X).

[0008]

However, the inner ring 2
Since 0 contacts one or more rollers 50 before being centered by the pad bearing 100, the center of the inscribed circle between the inner ring 20 and the roller 50 is likely to be displaced, and the rollers 50 intervening in the circumferential direction are uniform. Since it does not move in the idling direction, it becomes difficult to assemble and it becomes necessary to use a special assembly jig. In such a case, there is a problem that the number of man-hours for assembling the one-way clutch increases and the workability of assembling deteriorates.

According to the present invention, since the inner ring is centered by the pad bearing before the inner ring comes into contact with the rollers, it is not necessary to use a special assembling jig, and the assembling man-hour of the one-way clutch is not increased. It is an object of the present invention to provide a roller type one-way clutch that can also improve the workability of.

[0010]

In order to achieve the above object, the roller type one-way clutch of the present invention comprises:

An outer ring which is radially separated, is concentrically arranged so as to be relatively rotatable, and has an annular inner peripheral cam surface extending in the axial direction, and an inner ring which is disposed in the outer ring and has an outer peripheral raceway surface. A plurality of roller members arranged between the outer ring and the inner ring for transmitting torque between the outer peripheral raceway surface and the inner peripheral cam surface; and a pad bearing for centering the inner ring with respect to the outer ring, In a roller type one-way clutch consisting of

An axial end portion of the pad bearing is characterized in that it has a projecting portion that projects axially outward from a surface formed by the axial end surfaces of the plurality of roller members.

[0013]

According to the present invention, since the inner ring is centered in advance by the protruding portion of the pad bearing when it comes into contact with the roller, the roller uniformly moves in the idling direction and the assembling becomes easy.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. Needless to say, the examples described below are intended to illustrate the present invention and are not intended to limit the present invention. In addition, the same portions in each drawing are represented by the same reference numerals.

FIG. 1 is a partially broken radial sectional view showing a roller type one-way clutch 30 according to an embodiment of the present invention. In the following description, the “roller type one-way clutch” is simply referred to as the “one-way clutch” for simplification of the description.

The one-way clutch 30 includes an outer ring 1, an inner ring 2 arranged concentrically with the outer ring 1, a plurality of rollers arranged between an outer peripheral raceway surface 3 of the inner ring 2 and an inner peripheral cam surface 9 of the outer ring 1. A member, that is, the roller 15, and a pad bearing 10 for centering the outer ring 1 and the inner ring 2 and guiding the roller 15.
And a spring 7 contacting the idle side of the roller 15 and a mounting plate 8 for the spring 7. The roller 15 is
The side plate 6 prevents the side plate 6 from falling off in the axial direction.

In such a structure, the one-way clutch 30 is configured to rotate the inner ring 2 in only one direction with respect to the outer ring 1 by the cam mechanism composed of the roller 15 and the inner peripheral cam surface 9. That is, the inner ring 2 idles with respect to the outer ring 1 in the direction of arrow Z in FIG. 1, and imparts a rotational torque to the outer ring 1 via the cam mechanism only in the opposite direction.

The pad bearing 10 guides the roller 15 and centers the inner ring 2 with respect to the outer ring 1. The pad bearing 10 is attached to the one-way clutch 30, particularly to the inner ring 2. Is done like.

FIG. 2 shows the state before the inner ring 2 is assembled. The roller 15 is pressed against the meshing side by the spring 70, and from the diameter A of the inscribed circle of the pad bearing 10 with respect to the inner ring 2, The diameter B of the inscribed circle of the roller 15 with respect to the inner ring 2 is smaller.

When the inner ring 2 is inserted in the axial direction in this state, the inner ring 2 comes into contact with the roller 15, and when it is further inserted, the roller 15 is pushed away to rotate the inner ring 2 or the outer ring 1 toward the idling side (direction of arrow Z in FIG. 1). You have to push it in.

However, in the present embodiment, as shown in FIG. 3, one end portion in the axial direction of the pad bearing 10 is a protruding portion that projects outward in the axial direction from the surface C formed by the axial end surfaces of the plurality of roller members 15. Equipped with 10a. The protrusion 10a extends axially outwardly by a length D in the insertion direction of the inner ring 2.
Therefore, the length D is the inner ring 2 is the one-way clutch 3
0 is the insertion allowance when assembled, and the protruding portion of the pad bearing 10 before the inner ring 2 contacts the plurality of rollers 15.
Contact 10a. Therefore, there is no need to bother with the difficulty of assembling that is caused by the fact that a large number of rollers 15 intervening in the circumferential direction do not move uniformly in the idling direction, and for that purpose there is no need to use a special assembling jig.

The pad bearing 10 will be described in detail below. In FIG. 4, the pad bearing 10 includes a block-shaped solid main body portion 10c, a collar portion 10b that is integrally formed on a radially outer edge portion of the main body portion 10c, and extends on both sides in the circumferential direction, and a main body portion. It is formed integrally with the part 10c and has a length of D in the axial direction.
And a protrusion 10a protruding from 0c. The protruding portion 10a is provided on the inner edge portion in the radial direction of the main body portion 10c.

In FIG. 3, the edge 10d axially outward and radially inward of the protrusion 10a is the portion which first comes into contact with the inner ring 2 to be inserted, but the shape thereof is substantially right angle.
However, in order to make the insertion of the inner ring 2 smoother, the shape shown in FIGS. 5A and 5B may be adopted.

In the example shown in FIG. 5A, the axially outward and radially inward edge 10d of the protrusion 10a of the pad bearing 10 is chamfered with a straight line. Therefore, when the inner ring 2 is assembled, the edge 1 of the protruding portion 10a in which the axial edge of the inner ring 2 is chamfered
Since it slides along the slope of 0d, the inner ring 2 can be guided and inserted more smoothly. The angle and size of the chamfered portion can be arbitrarily set as required.

In the example shown in FIG. 5B, the axially outward and radially inward edge 10d of the protrusion 10a of the pad bearing 10 is chamfered, that is, rounded. Therefore, when the inner ring 2 is assembled, the axial edge of the inner ring 2 slides along the curved surface of the chamfered protrusion 10d, so that the inner ring 2 can be guided and inserted more smoothly. The radius of curvature of the chamfer and the like can be arbitrarily set as required. Thus, the protrusion
By processing the edge 10d of 10a into a round shape, the inner ring 2 can be inserted more easily than in the example of FIG. 5A.

Although the pad bearing is a faithful member in the above-mentioned embodiment, it may be a pad bearing having a U-shaped cross section as in the conventional case. Even in this case, it is needless to say that the same effects as those described below can be obtained by providing the protrusions at the same positions as those in the above embodiment.

[0027]

According to the roller type one-way clutch of the present invention described above, the following effects can be obtained.

By centering the inner ring with a pad bearing before the inner ring comes into contact with the roller, the roller can be uniformly moved in the idling direction, it is not necessary to use a special assembly jig, and the roller type one-way is used. Assembly workability can be improved without increasing the number of clutch assembly steps.

If the edge of the protruding portion of the pad bearing that first contacts the inner ring is chamfered as in the embodiment, the inner ring can be inserted more easily.

[Brief description of drawings]

FIG. 1 is a partially cutaway radial sectional view of a roller type one-way clutch showing an embodiment of the present invention.

2 is a radial cross-sectional view of the roller type one-way clutch of FIG. 1 showing a state before the inner ring is assembled.

FIG. 3 is a diagram showing a dimensional relationship between a roller and a pad bearing when the inner race is assembled in the embodiment of FIGS. 1 and 2.

FIG. 4 is a perspective view of a pad bearing.

FIG. 5A is a side view of a pad bearing showing an example of chamfering of a protrusion.

FIG. 5B is a side view of the pad bearing showing another example of chamfering the protrusion.

FIG. 6 is a partially broken radial sectional view of a conventional roller type one-way clutch.

7 is a radial cross-sectional view of the roller type one-way clutch of FIG. 6 showing a state before the inner ring is assembled.

[Explanation of symbols]

 1 Outer ring 2 Inner ring 7 Spring 8 Mounting plate 9 Inner peripheral cam surface 10 Pad bearing 10a Projection 15 Roller 30 Roller type one-way clutch

Claims (2)

[Claims] 1. An outer ring having an annular inner peripheral cam surface that is radially separated from each other, is concentrically arranged so as to be relatively rotatable, and has an axially extending annular outer peripheral raceway surface. An inner ring, a plurality of roller members arranged between the outer ring and the inner ring to transmit torque between the outer peripheral raceway surface and the inner peripheral cam surface, and a pad bearing for centering the inner ring with respect to the outer ring In the roller type one-way clutch consisting of, the axial end portion of the pad bearing has a protruding portion that protrudes outward in the axial direction from a surface formed by the axial end surfaces of the plurality of roller members. Roller type one-way clutch. 2. The roller type one-way clutch according to claim 1, wherein an edge of the pad bearing on the inner ring side is chamfered.