JPH0256528B2 - - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a one-sided clutch fixing device for fixing, for example, a pulley, a gear, etc. to the one-sided clutch.

Technical Background of the Invention Conventionally, recesses having cam surfaces and extending in the axial direction are formed at a suitable number of circumferential locations on the inner peripheral surface of a cylindrical portion of an outer ring made of a thin plate, and the outer ring is engaged with the recesses. A one-sided clutch comprising rollers held by a rotation-prevented retainer, wherein a recess in the outer ring is formed by radially outward expansion of a cylindrical portion of the outer ring, and an outer peripheral surface of the cylindrical portion of the outer ring is formed. A one-way clutch fixing device is known in which a convex portion corresponding to the concave portion is formed in the clutch, and the convex portion serves as a rotation preventing portion for an outer ring fitting member formed of a synthetic resin member.

These conventionally known fixing devices tightly fit the outer ring by bringing the outer surface of the convex portion and the outer peripheral surface of the cylindrical portion of the outer ring into contact with the outer ring fitting member.

Problems with the Background Art However, in conventional devices, when the outer ring is fitted to the outer ring fitting member with a large interference, the convex portion of the outer ring is tightened by the outer ring fitting member, deforming the cam surface, and on the other hand, the clutch performance may be impaired.

In addition, in this type of one-way clutch, the convex part of the outer ring is
Since the machining and finishing accuracy is not better than the outer peripheral surface of the cylindrical part, it is difficult to precisely machine the recess of the outer ring fitting member that receives the convex part to match the convex part, and if variations in machining accuracy occur, Press-fitting the outer ring to the outer ring fitting member becomes troublesome.

Purpose of the Invention The present invention has been made in view of the above circumstances, and its purpose is to eliminate deformation of the cam surface of the outer ring when it is fitted into the outer ring fitting member, to obtain smooth clutch operation, and to provide a The object of the present invention is to provide a clutch fixing device that is easy to assemble and process.

SUMMARY OF THE INVENTION The present invention includes forming recesses having a cam surface and extending in the axial direction at a suitable number of circumferential locations on the inner peripheral surface of a cylindrical portion of an outer ring made of a thin plate, and engaging the outer ring in the recesses. A one-sided clutch is provided with rollers held by a retainer that is prevented from rotating, and the recess in the outer ring is formed by radially outward expansion of the outer ring fitting part, so that the outer peripheral surface of the outer ring fitting part is fixed. A convex portion corresponding to the concave portion is formed, and the convex portion is used as a rotation prevention portion for the outer ring fitting member, and the outer peripheral surface of the cylindrical portion of the outer ring is a contact engagement portion for the outer ring fitting member, and each of the above-mentioned An appropriate gap is provided between the convex portion and the outer ring fitting member.

Embodiments of the Invention The drawings show embodiments of the invention, which will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes an outer ring made of a thin plate, which is formed on the inner circumferential surface of a cylindrical portion 2 of the outer ring by expanding radially outward at a suitable number of circumferences of the cylindrical portion 2. A recess 3 lying in the axial direction is formed, and a convex portion 4 corresponding to the recess 3 is formed on the outer circumferential surface of the cylindrical portion 2. The thickness is approximately uniform with that of the other parts.

The inner circumferential recess 3 and outer circumferential convex part 4 of the outer ring 1 are formed using male and female molds corresponding to the shapes of the above-mentioned recess 3 and protrusion 4 when forming the outer ring by deep drawing a thin plate.

The recesses 3 are provided at predetermined intervals and are connected to a cam surface 6 into which the rollers 5 are inserted.

The rollers 5 are normally located on the shaft 7, and are prevented from coming off in the axial direction by the end rings 9, 9 of the holding part 8, and their position is stopped by the pillars of the cage 8 that connect the end rings and partition the rollers. It will be held at 10.

Further, a spring 11 for retaining the roller 5 in the recess 3 is attached to the pillar 10, and a locking protrusion 12 provided on the end ring 9 prevents the holding portion 8 from rotating.
This is done by locking the

Reference numeral 14 denotes a mechanical component into which the outer ring 1 is fitted, and a cylindrical inner circumferential surface 15 of the fitting hole is provided with a mechanical part lying in the axial direction and having an appropriate gap S with respect to the outer circumferential convex portion 4 of the outer ring 1. Recesses 16 for receiving the protrusions are formed in accordance with the number and circumferential position of the outer peripheral protrusions 4 of the outer ring 1,
The cylindrical inner surface 18 of the convex portion 17 between the recesses 16 contacts and engages the outer circumferential surface of the cylindrical portion 2 between the outer circumferential convex portions 4 and 4 of the outer ring 1 with an appropriate interference, thereby forming the outer ring 1. is fitted and held by the mechanical part 14.

Next, the operation of the above configuration will be explained. When the shaft 7 rotates in the counterclockwise direction indicated by arrow A in FIG.
The rollers 5 bite into the cam surface 6 while elastically expanding the outer ring 1 radially outward, and this biting causes the mechanical component 14 to interlock with the shaft 7 to transmit power.

When the shaft 7 rotates in the clockwise direction indicated by the arrow B, the rollers 5 press against the spring 11 and remain in the recess 3, and are allowed to idle in the recess. Therefore, outer ring 1
does not interlock with the shaft 7, and the retainer 8 has its locking protrusion 12.
is stopped from rotating by engaging with the edge 13 of the recess 3.

FIG. 3 shows a mechanical component 14 made of synthetic resin, and a convex portion 17 formed in an inner circumferential surface 15 between recesses 16, 16, at approximately the center in the circumferential direction of a cylindrical inner circumferential surface 18. A horizontal concave cutout 19 is provided, and when the outer ring 1 is press-fitted to the mechanical part 14,
The inner circumferential surface 18 of the convex portion 17 is pressed by the outer circumferential surface of the cylindrical portion 2 of the outer ring 1, and the convex portion 17 is elastically deformed in the direction of the arrow in the figure, and is pressed against the root of the outer circumferential convex portion 4 of the outer ring 1. As a result, the outer ring 1 can be reliably prevented from rotating and fitted to the mechanical component 14.

Further, even when the circumferential width of the convex portion 17 of the mechanical component 14 is larger than the circumferential width of the outer circumferential surface of the cylindrical portion 2 of the outer ring 1, it is reduced by the concave cutout 19.

Although the shape of the recessed recess 19 is shown as having an arcuate cross section, it is not limited to this shape and may be any shape that is suitable for the purpose.

In addition, the mechanical part 14 which is a fitting member of the outer ring 1 in each of the above embodiments may be a rotational force transmitting member such as a pulley or a gear, and may be made of an appropriate material such as iron, aluminum, synthetic resin, or rubber. It may be something you have.

Effects of the Invention As explained above, the present invention differs from the conventional fixing device in which the outer ring is tightly fitted by bringing the outer ring fitting member into full contact with the outer surface of the outer ring. Since the contact engagement portion for the mating member is provided and an appropriate gap is provided between each of the convex portions of the outer ring and the recess of the outer ring fitting member, when the outer ring and the outer ring fitting member are fitted and fixed, The convex portion of the outer ring is not tightened by the outer ring fitting member and the cam surface is not deformed, and a smooth cracking operation can be obtained.

Further, since the contact engagement between the outer ring and the outer ring fitting member is performed at a circumferential portion that is easy to process with high accuracy, it becomes easier to fit the outer ring and the outer ring fitting member. Furthermore, since the shape of the recess of the outer ring fitting member that receives the outer ring protrusion is not restricted by the shape of the outer ring protrusion, processing of the outer ring fitting member becomes extremely easy.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway cross-sectional view of an embodiment of the present invention;
FIG. 2 is a partially omitted vertical cross-sectional view showing the inside of the outer ring, and FIG. 3 is a cross-sectional view of a main part of another embodiment of the convex portion of the outer ring fitting member. DESCRIPTION OF SYMBOLS 1... Outer ring, 2... Cylindrical part, 3... Recessed part, 4...
...Convex portion, 5...Roller, 6...Cam surface, 14...Machine part.

Claims (1)

[Scope of Claims] 1. Recesses having cam surfaces and extending in the axial direction are formed at a suitable number of circumferential locations on the inner peripheral surface of the cylindrical portion of the outer ring made of a thin plate, and the recesses are engaged with the outer ring. A one-sided clutch comprising rollers held by a rotation-prevented retainer, wherein a recess in the outer ring is formed by radially outward expansion of a cylindrical portion of the outer ring, and an outer peripheral surface of the cylindrical portion of the outer ring is formed. A convex portion corresponding to the concave portion is formed, and the convex portion is used as a rotation prevention portion for the outer ring fitting member, and the outer peripheral surface of the cylindrical portion of the outer ring is a contact engagement portion for the outer ring fitting member, and each of the above-mentioned A fixing device for a one-way clutch, characterized in that an appropriate gap is provided between a convex portion and an outer ring fitting member. 2. The one-way clutch fixing device according to claim 1, wherein the outer ring fitting member is made of synthetic resin. 3. The one-way clutch fixing device according to claim 1, wherein the outer ring fitting member is a rotational force transmitting means.