JPH074341Y2 - Hand clutch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a one-way clutch, and more particularly to a technique for improving workability of assembling a retainer into a shell.

(Prior Art) Conventionally, as a one-way clutch called a shell type, one shown in FIG. 5 is known.

On the other hand, the one-side clutch includes a plurality of rollers 30 as shown.
And a cage having the same number of roller pockets 31 as the rollers 30.
32, a shell 34 having the same number of cam surfaces 33 as the rollers 30,
And a spring (not shown) that biases the roller 30 toward the cam surface 33. by the way,. This one-sided clutch prepares an unfinished shell 34 in which one open end of the tubular body is bent inward in the radial direction to form an inward flange 34A. From the open end of the shell 34, the roller 30 and the spring are prepared. Since the retainer 32 is assembled and the open end of the shell 34 is bent inward in the radial direction to be completed, other components such as the retainer 32 do not drop from the shell 34.

Further, as shown in FIG. 6, there is also a clutch which is incorporated into other functional parts and handled as a unit.
The one clutch is different from the one clutch shown in FIG. 5 in the configuration of the shell 34. That is, one end of the shell 34 is not bent, and on the other hand, the constituent parts of the clutch alone can be separated.

However, in this one-side clutch, by incorporating the functional component in the housing 35, the retainer 32 is provided by the inward flange portion 35A provided at the inner end of the hollow portion of the housing 35.
Is prevented from dropping from the open end side of the shell 34.

(Problems to be solved by the invention) By the way, the one-way clutch shown in FIG. 5 requires a bending process to bend the open end of the unfinished shell 34 in the radial direction when assembled, and If it is hardened by heat treatment, it is necessary to anneal by high-frequency heating in the previous step of performing the bending work, and the assembling work is complicated, and the assembling workability is poor, leading to cost increase. There was an inconvenience.

On the other hand, in the one-way clutch shown in FIG.
It is pointed out that the workability up to the incorporation into the housing 35 is poor because the respective constituent parts housed inside can be separated until it is incorporated.

The present invention has been made in view of such circumstances, and an object thereof is to provide a one-way clutch that is easy to handle as a single unit and that can improve the workability of assembling the retainer into the shell to achieve cost reduction. .

(Means for Solving Problems) The present invention has the following configuration in order to achieve such an object.

One clutch of the present invention comprises a plurality of rollers, a cage made of synthetic resin having the same number of roller pockets as the rollers, a shell having the same number of cam surfaces as the rollers, and a spring for biasing the rollers toward the cam surfaces. It is a unitized structure,
The shell comprises a tubular body having a radially inward flange at one end in the axial direction and the other end in the axial direction being open, and on the outer periphery of the annular portion on the front end side in the mounting direction of the cage with respect to the flange of the shell. , A locking projection that engages with the cam surface to prevent relative rotation between the shell and the retainer is provided, and the inner circumference of the open end of the shell and the rear of the retainer in the assembling direction with respect to the shell An annular concave engaging portion is formed on either one of the outer periphery of the end side annular portion and a convex engaging portion is formed on the other side, and the shell is formed by engaging the concave engaging portion and the convex engaging portion. It has a structure in which the retainer is held by.

(Operation) According to the above configuration, when the retainer is inserted from the open end of the shell, the concave engagement portion and the convex engagement portion formed on the shell and the retainer engage with each other. The cage will not fall off easily.

(Embodiment) Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

1 is a vertical side view, and FIG. 2 is an enlarged sectional view taken along the line II-II of FIG. In these figures, 1 is a shell, 2 is a retainer, and 3 is a roller.

The shell 1 is made of a tubular body having an inward flange 11 whose one end in the axial direction is bent inward in the radial direction and an open end 12 on the other end side in the axial direction. The shell 1 has the same number as the rollers 3 on the inner periphery of the peripheral wall portion 13. A concave cam surface 14 is formed.

The cage 2 is made of synthetic resin and has the same number of roller pockets 20 as the rollers 3. As shown in FIG. 3 and FIG. 4, this cage 2 has two annular portions 21 and 22 provided at both axial ends of the cage 2 so as to face each other, and these annular portions are circumferentially arranged. It is composed of a plurality of pillars 23 that are bridged at equal intervals in the direction.

A bifurcated spring 24 that expands and extends toward the adjacent column portion 23 is housed and integrated with the cage 2 on one side in the circumferential direction of the roller pocket 20. Further, on the outer periphery of the annular portion 21 on the front end side in the mounting direction of the cage 2,
For example, a locking projection that engages every other cam surface 14 of the shell 1 to prevent relative rotation between the shell 1 and the cage 2.
25 are projected.

Further, an annular concave engaging portion 4 is formed on the inner periphery of the open end 12 of the shell 1, and an annular convex shape capable of engaging with the concave engaging portion 4 is formed on the outer periphery of the annular portion 22 of the cage 2. The locking portion 5 is formed.

The procedure for assembling the one-sided clutch having the above configuration will be described.

First, after the roller 3 is held in each of the roller pockets 20 of the cage 2, the annular portion 21 on the tip end side in the assembling direction of the cage 2 is made to face the open end 12 of the shell 1 and the cam surface 14 is formed.
The locking projections 25 are associated with every other
When is pushed into the shell 11, the assembled state is obtained in which the relative rotation of the shell 1 and the cage 2 is prevented by the engagement of the cam surface 14 and the locking projection 25.

At the same time, the annular concave engaging portion 4 formed on the open end 12 of the shell 1 and the annular convex locking portion 5 formed on the annular portion 22 of the cage 2 engage with each other. Thus, the assembled state can be obtained in which the cage 2 does not drop off from the open end 12 of the shell 1.

In this assembled form, the roller 3 is biased by the bifurcated spring 24 toward the narrow side of the space formed by the cam surface 14 and the roller pocket 20, respectively. The one-side clutch thus completed is attached to the rotary shaft 6 so that a plurality of rollers 3 are circumscribed on the outer peripheral surface thereof, as shown in FIGS. 1 and 2.

In the above configuration, the concave engaging portion 4 is the open end 12 of the shell 1.
It can be easily formed by cutting the inner circumference, and the convex locking portion 5 can be formed at the same time when the cage 2 is molded. Moreover, the cage 2 is aligned in the circumferential direction from the annular portion 21 side on the leading end side in the assembling direction, and the simple work of inserting the cage 2 from the open end 12 of the shell 1 toward the inward flange 11 is performed. As a result, the concave engagement portion 4 and the convex engagement portion 5 are automatically engaged with each other, so that the assembling workability is extremely improved and the inconvenience that the cage 2 is unintentionally detached from the shell 1 is prevented. It can be avoided. Further, the spring 24 is integrated with the cage 2 so that it can be easily handled.

In the above-described embodiment, the concave engaging portion 4 is formed on the inner circumference of the open end 12 of the shell 1, and the annular portion 22 on the rear end side in the mounting direction of the cage 2 is formed.
In the description, the convex locking portion 5 is formed on the outer circumference, but the present invention is not limited to the above-mentioned embodiment, and the open end of the shell 1 is not limited thereto.
The convex locking portion 5 may be formed on the inner circumference of the ring 12, and the concave engaging portion 4 may be formed on the outer circumference of the annular portion 22 on the rear end side in the mounting direction of the cage 2.

(Effect of the Invention) As described above, according to the present invention, the concave engaging portion and the convex engaging portion provided on the inner periphery of the open end of the shell and the outer periphery of the annular portion on the rear end side in the assembling direction of the cage are provided. Since the retainer is held by the shell by engaging with the part, when it is delivered as a single unit, there is no separation like the one-way clutch shown in FIG. improves. Moreover, the number of working steps can be reduced as compared with the one-way clutch shown in FIG. 5 of the conventional example, and the assembling work is simplified and the assembling workability is improved, so that the cost reduction can be achieved.

Further, since the concave engaging portion is formed into an annular shape, positioning for engaging with the convex locking portion is not required, and the retainer and the outer ring can be easily assembled. It is possible that the shell and the cage rotate relative to each other because the concave engagement portion is annular, but such relative rotation is prevented by the engagement of the cam surface and the engagement protrusion. it can.

[Brief description of drawings]

1 to 4 relate to an embodiment of the present invention.
The figure is a vertical side view showing a use state, FIG. 2 is an enlarged view of II-II cross section in FIG. 1, FIG. 3 is a side view of a cage shown in a partial cross section, and FIG. 4 is IV of FIG. FIG. 4 is a sectional view taken along line IV. FIGS. 5 and 6 show two types of one-side clutches of the conventional example, both of which are schematic longitudinal side views. DESCRIPTION OF SYMBOLS 1 ... Shell, 2 ... Retainer, 3 ... Roller, 4 ... Recessed engaging part, 5 ... Convex locking part, 11 ... Inward flange, 12 ... Open end, 14 ... Cam surface, 20 ... Roller pocket, 22 … Annular part on the rear end side in the direction of installation, 24… Spring.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hitoshi Ito 2 Nishinomachi Nishinomachi, Minami-ku, Osaka City, Osaka Prefecture Koyo Seiko Co., Ltd. (56) References JP53-125553 (JP, A) 62-80030 (JP, U) Actually opened 63-184229 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A unit comprising a plurality of rollers, a synthetic resin cage having the same number of roller pockets as the rollers, a shell having the same number of cam surfaces as the rollers, and a spring for urging the rollers toward the cam surfaces. One-sided clutch, wherein the shell comprises a tubular body having a radially inward flange at one end in the axial direction and the other end in the axial direction opened, and the cage is assembled into the flange of the shell. On the outer periphery of the annular portion on the front end side in the direction, there is provided a protruding protrusion that engages with the cam surface to prevent relative rotation between the shell and the retainer, and the inner periphery of the open end of the shell and the retainer. An annular concave engaging portion is formed on either one of the outer periphery of the annular portion on the rear end side in the direction of incorporation with respect to the shell of the container, and a convex engaging portion is formed on the other side, and the concave engaging portion and the convex engaging portion are formed. Hold the cage on the shell by engaging the stopper. One-way clutch characterized by being made.