JPS58124831A - Method of manufacturing shell of shell-type one-way clutch - Google Patents

Abstract

PURPOSE:To reduce labor hour and eliminate waste of materials by forming cam surfaces on a belt-like material cut to a required size, bending same, and butting the end edges to form a shell. CONSTITUTION:A belt-like material 10 of a required width W is cut to a required length L, and cam surfaces 11 are formed thereon by required pitches P by plastic working such as coining, embossing, or the like. The belt-like material 10 where the cam surfaces are thus formed is bent to be formed into a cylinder, and the butt end edges 12 are united in a body by resistance welding, or the other suitable welding means.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shell for a shell-type one-way clutch, and more particularly to a method for manufacturing a shell forming an outer ring or an inner ring of a one-way clutch.

To manufacture this type of one-way clutch shell, generally, a disk is punched out of a flat plate material, the punched disk is subjected to a 9-prong process to form a cup-shaped cylindrical body, and the bottom of the disk is then punched out. After that, the cam surface for the roller or sprag is formed. This conventional manufacturing method not only involves a large number of steps, but also generates scraps when punching out a disk from a flat plate, and scraps when punching out the bottom of a cup-shaped cylindrical body. There is a large amount of material wasted due to the generation of , etc., and it is extremely disadvantageous and advantageous in terms of cost.

The purpose of this invention is to significantly reduce the number of man-hours and reduce the waste of materials to almost zero in the production of shell bodies for shell-type one-way clutches, thereby significantly reducing costs. It is something to do.

Figure 1 shows an example of a shell-type one-way clutch to which the present invention can be applied, in which l is a shell forming an outer ring with a cam surface 2 protruding to the inner diameter, and the cam surface 2 is a built-in roller 3. The molding is performed with the required pitch interval (circumferential direction) corresponding to the number. 4 is a shaft on which the roller 3 rolls when one clutch is idle; 5 is a retainer; and 6 is a spring attached to the retainer 5 by means not shown in order to bias the roller 3 toward the cam surface 2. As is well known, in this type of one-way clutch, when the shaft 4 rotates in the direction of the arrow in the figure, the roller 3 locks between the shaft periphery and the cam surface 2, and the shell l is integrated with the shaft 4. When the shaft 4 is rotated in the opposite direction, the lock is released and the shaft 4 idles.

In the production of a shell body for a shell type one-way clutch as described above, the present invention involves preparing a strip material 10 having a required thickness and width W as shown in FIG. 9. Cut to a required length corresponding to the circumference of the shell l formed into a cylindrical shape, and make a protrusion M protrude from the cut edge for welding the butt edge as described below. . (Note that this protrusion M is provided in case of resistance welding, etc.)
In such cases, it is not necessary to provide this. ) For the strip-shaped material IO, after or before cutting, cam 5 surfaces 1] are formed with a required pitch interval P. The cam surface 11 is formed by plastic working such as coining or embossing, and in a flat plate state, the cam surface 11 may be simply formed into an inclined plane as shown in FIGS. 3(a)*(b).

Next, the strip-shaped material lO having the cam surface 11 formed by K in this manner
is bent into a cylindrical shape, and the butt edges 12 are joined together by resistance welding or other suitable welding means.As a characteristic of the bending process, as shown in FIG. Forming a curved surface with a radius of just a radius is advantageous, especially when the shell 1 is an outer ring. In addition, when the shell body 1 is an inner ring, in order to prevent the cam surface 11 from protruding toward the outer diameter side, when forming the cam surface 11 on the strip-shaped material 10, an appropriate curvature is given to the cam surface 11 in advance. Just leave it there.

As explained above, according to this invention, a strip-shaped material lO of a required width W is cut to a required dimension LK, and the paper cam surface 11 is formed by coining, embossing, etc., and the rear side is processed, and the butted edges are Since the shell is formed by welding and joining, the loss in weighing the material is extremely small as shown by the reference numeral 12 in Figure 2, and this loss can be further reduced. The amount of scraps is almost zero, and material loss is significantly reduced compared to conventional methods.

In addition, since the cam surface is colored by coining, embossing, etc. while the material is flat, it is not only easy to form, but also extremely accurate.
Compared to manufacturing shells by conventional machining or deep drawing, the manufacturing man-hours are significantly reduced.
Moreover, it is easy to process, and the cost of the one-way latch body can be significantly reduced.

Furthermore, as mentioned above, when the shell is an outer ring, the cam surface is conveniently formed into a curved surface at the same time as the bending process, and this is extremely advantageous in maintaining the appropriate contact angle of the assembled leaves, etc. We can provide high quality one-way clutches at low cost.

In addition, if it is necessary to form a flange-like collar on the inner diameter side (in the case of an outer ring) or on the outside pole side (in the case of an inner ring) at both axial ends of the shell, it is necessary to form a flange-like collar on the inner diameter side (in the case of an outer ring) or on the outside pole side (in the case of an inner ring), after cylindrical forming and welding. It may be formed by bending the collar.

[Brief explanation of drawings]

Figure 1 is a partial cross-sectional view illustrating a shell-type one-way clutch, Figure 2 is a plan view of the band-shaped material, Figure 3 is (&) #
(1)) is a plan view and a front view of the strip material after cam surface molding,
@Figure 4 (&) l (b) is a front view and 1Ef 1 side view of the strip material after cylindrical molding, and Figure 5 is an enlarged view of the main part. lO...Strip material, 11...Cam surface, M...Protrusion, L...Length dimension, P...Pitch interval (Figure 4 (α) (b) - 柁a) 3rd figure

Claims (1)

[Claims] (1) Cutting a strip-shaped material into a required length corresponding to the circumference of the shell, and protruding a cam surface on one side of the strip-shaped material at a required pitch interval by plastic working, A method for manufacturing a shell for shell-type one-sided tartling patented in which a band-shaped material with a protruding cam surface is bent into a cylindrical shape and the butted ends are welded and packed (2) A patent claim in which the plastic working is coining. A method for producing a shell for a one-way clutch according to scope (1) (3)
Claim 1: The method of manufacturing a shell for a one-way clutch according to claim 1, wherein the plastic working is embossing. Claim 4: Processing to form a curve so that the cam surface projects onto the inner diameter surface of the cylindrical body. (5) A method of manufacturing a shell for a one-way clutch according to any one of (1) to (3). (5) A claim in which the cam surface is bent so as to protrude from the outer diameter surface of the cylindrical body. The method for manufacturing a shell for a one-way clutch according to any one of (1) to (3)