JPH0914111A - One-directional roller clutch device for starting motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve producibility by forming an inversed tapered stepped portion on a diametral outer side of a surface which engages with a roller, on an open side end face of a clutch outer which is slidably supported to an output rotation axis of a starting motor, and integrating the roller, a clutch inner with the clutch outer. SOLUTION: A one-directional roller clutch is arranged on an output rotation axis of a motor which generates a torque for starting an engine. In order to assemble this, a roller 3 and a pushing spring are inserted inside an engagement surface 2b of a clutch outer 2. A fixation washer 7 is inserted into an inversed tapered portion 2d formed on an end face of the clutch outer 2. Afterward, a clutch inner 5b of a pinion 5 is inserted into the roller 3 through an inner diameter part of the fixation washer 7, and connected thereto. The fixation washer 7 is then subjected to pressurization from an axial direction, and flattened for integrally connecting the clutch outer 2 to the pinion 5. It is thus possible to prevent projection of the roller 3 in an axial direction and escape of the pinion 5 in an axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-way roller clutch provided on an output rotary shaft of an electric motor for generating a rotational force for starting an engine, and more particularly to fixing clutch parts integrally. The present invention relates to a suitable one-way roller clutch device.

[0002]

2. Description of the Related Art A conventional apparatus is a method of covering the outer circumference of a clutch outer with a cylindrical cover formed by bending one end and crimping the other end of the cylindrical cover to fix a clutch component. It was Further, as described in Japanese Utility Model Publication No. 56-48931, a method is provided in which a bag-shaped recess is provided on the opening side of the clutch outer on the surface that engages with the roller, and an annular locking washer is fitted into the recess and fixed. is there.

[0003]

In the above-mentioned prior art, two semi-circular washers for preventing the rollers contained in the clutch outer from popping out in the axial direction and a seal packing for preventing leakage of lubricating grease. The outer cover was covered with a cylindrical cover formed by bending one end, and the clutch outer was crimped. Moreover, since the clutch outer is manufactured by cold forging, drooping occurs on the end surface, so it is necessary to remove it by cutting in order to prevent improper fixing of the semicircular washer, and the number of parts and manufacturing man-hours are large, resulting in high productivity. It was bad. Also, Kimiko
In the method described in JP-A-56-48931, the recess provided at the end of the clutch outer has a bag shape and the end face is not opened, so that the annular locking washer can be fitted into the recess. It could not be fitted unless the washer was extremely deformed, and it was extremely difficult to manufacture and it was impossible to assemble at present.

It is an object of the present invention to provide a low cost one-way roller clutch device with good productivity.

[0005]

In order to achieve the above object, the present invention provides a stepped portion on the open side end surface of the clutch outer radially outside the surface engaging with the roller, and the open end of the stepped portion. Is a reverse taper shape, and the washer shape before assembly is a dish shape, and after inserting the washer into the reverse taper portion of the clutch outer end surface, it is flatly deformed by a predetermined load from the axial direction for assembly. An easy one-way roller clutch can be provided.

[0006]

According to this structure, the dish-shaped fixed washer can be inserted into the reverse taper portion of the clutch outer end surface without applying excessive force, and can be easily coupled by being deformed by pressure in the axial direction. The clutch component can be easily fixed, and the plate-like fixing washer can prevent the roller from jumping out in the axial direction and prevent the pinion from coming off in the axial direction. As a result, the two semicircular washers and the cylindrical cover formed by bending one end are unnecessary. Further, since the dish-shaped fixed washer expands in the radial direction by being deformed under pressure, the gap of the reverse taper portion provided on the clutch outer is eliminated and the leakage of the lubricating grease can be prevented, so that the seal packing can be eliminated. Moreover,
At the time of assembly, it is not necessary to remove the sore produced by the cold forging method of the clutch outer end surface by cutting.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

1 and 2, reference numeral 1 denotes an armature shaft having a helical spline portion 1a. Reference numeral 2 denotes a clutch outer, which is a helical spline portion 1a of the armature shaft 1.
Has a helical spline portion 2a that can be slid in the axial direction, a plurality of engaging surfaces 2b on the cylindrical portion 2c, and a stepped portion on the open side end surface radially outside the surface that engages with the roller. ,
An inverse taper portion 2d is formed at the open end of the stepped portion. 3 is a roller mounted on the engaging surface 2b, 4 is a pressing spring for holding the roller 3, and 5 is a pinion integrally formed with a clutch inner 5a for restricting the radial movement of the roller 3. A recess 5c is provided between the tooth-shaped portions 5b. A bearing 6 is slidably fitted on the inner circumference of the armature shaft 1. Reference numeral 7 denotes a fixed washer formed in a dish shape, and is fixed by being deformed under pressure to the outer side surface of the clutch.

In the apparatus constructed as described above, at the time of assembly, the roller 3 and the pressing spring 4 are first inserted inside the engaging surface 2b of the clutch outer 2, and the fixed washer 7 is provided on the end surface of the clutch outer 2. After being inserted into the reverse taper portion 2d thus formed, the clutch inner 5a portion of the pinion 5 is inserted into the through roller 3 portion through the inner diameter portion of the fixed washer 7 and connected. After that, the fixed washer 7 is flatly deformed in the axial direction by a predetermined load, and the clutch outer 2 and the pinion 5 are deformed.
It is possible to prevent the roller 3 from jumping out in the axial direction and prevent the pinion 5 from coming off in the axial direction by integrally fixing the. In addition, since the dish-shaped fixed washer 7 expands in the inner and outer radial directions by pressure deformation,
Since the inner diameter side is inserted into the recess 5c of the pinion 5 and the outer diameter side enters the reverse taper portion 2d provided in the clutch outer 2, there is no gap, so that the lubricating grease can be prevented from leaking.

According to this embodiment, the dish-shaped fixed washer 7 is used.
Can be inserted into the reverse taper portion 2d of the end surface of the clutch outer 2 without applying excessive force, and can be easily coupled by being deformed by pressure in the axial direction, so that the clutch component can be easily fixed, and Only the plate-like fixed washer 7 can prevent the roller 3 from protruding in the axial direction and prevent the pinion 5 from coming off in the axial direction. Moreover, since the leakage of the lubricating grease can be prevented, the conventional cover 1
There is no need to use two washers 8 and seal packing 9 having a shape of 0 and a semicircle. Further, by adopting this structure, it is not necessary to cut the wrinkled portion 2e of the end surface of the clutch outer 2, and this is an effective means for improving productivity and reducing cost.

[0011]

According to the present invention, the dish-shaped fixed washer can be inserted into the reverse taper portion of the clutch outer end surface without applying undue force, and can be easily coupled by pressure deformation in the axial direction. Therefore, the clutch component can be easily fixed, and the two semicircular washers, the seal packing, and the cylindrical cover formed by bending one end can be eliminated. Further, since the clutch outer end surface is not used during assembly, it is not necessary to remove the sore by cutting in the cold forging method. Therefore, the number of parts can be reduced, and a low-cost one-way roller clutch device with good productivity can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of a clutch unit according to the present invention.

FIG. 2 is an exploded view of the clutch of the present invention.

[Explanation of symbols]

1 ... Armature shaft, 2 ... Clutch outer, 2d ...
Reverse taper part, 3 ... Roller, 5 ... Pinion, 5a ... Clutch inner, 7 ... Fixed washer.

Claims (1)

[Claims] 1. A one-way roller clutch having a clutch outer slidably supported by an output rotary shaft of an electric motor for starting an engine, and a clutch inner connected to the clutch outer via a roller. A stepped portion is provided on the open end surface radially outward of the surface that engages with the roller, and the stepped portion has a reverse taper shape toward the open end, and a plate member is press-fitted and fixed to the reverse tapered portion. Then, the one-way roller clutch device for a starting motor, wherein the roller and the clutch inner are integrated with the clutch outer.