JP2003120787A - Stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator having a notch type one-way clutch 5 capable of effectively restricting generation of stress concentration to a pocket part 8 when the one-way clutch 5 is locked. SOLUTION: A strut 9 as a component part of the one-way clutch 5 is formed to have a spherical bottom part in such a way that a convex spherical part 15 is formed on a bottom surface part of the strut 9. In an inner surface of a pocket part 8 to contain the strut 9, a concave spherical part 20 of a corresponding form is provided. A strut support structure comprising both spherical parts 15 and 20 slidably in contact with each other is thus formed.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator used for a torque converter of an automatic transmission for an automobile, and more particularly, to a stator having a notch type one-way clutch (notch). Type stator). 2. Description of the Related Art Conventionally, as shown in FIGS. 4 and 5, an annular stator body 1 in which an inner ring 2, a blade 3 and an outer ring 4 are concentrically and integrally formed of a resin material such as phenol resin. A stator having a notch type one-way clutch 5 on the inner peripheral side of the stator main body 1 is known. In this stator, a notch type one-way clutch 5 is configured as follows. [0004] First, an annular metal pocket plate 6 is fixed to the inner peripheral side of the stator main body 1 by insert molding, and a metal notch plate 7 also having an annular shape is relatively attached to the pocket plate 6. It is rotatably combined. As shown in the cross-sectional view of FIG. 6, a required number of pocket portions 8 are provided at an end face portion 6a of the pocket plate 6 at regular intervals in the circumferential direction.
Are supported by a spring 10 so as to be swingable. The notch plate 7 has an end face 7a facing the end face 6a of the pocket plate 6. A required number of engagement recesses 11 are provided at regular intervals in the circumferential direction at the end face 7a of the notch plate 7. One inner wall 11a is formed with a relatively steep rising angle so that the strut 9 engages (locks) with the inner wall 11a. On the other hand, the other inner wall 11b in the circumferential direction of the engaging concave portion 11 is formed to have a relatively gentle rising angle so that the strut 9 can get over (slip). Therefore, when the notch plate 7 attempts to rotate relative to the pocket plate 6 in the direction A in the drawing due to the engagement structure of the strut 9 and the engagement recess 11,
Is engaged with one of the inner walls 11a to prevent relative rotation, and only relative rotation in the opposite direction B is allowed. In the stator provided with such a one-way clutch 5, in recent years, components have been sequentially converted from metal to resin from the viewpoints of weight reduction of components and simplification of manufacture. A stator in which the pocket plate 6 is made of resin has been developed. As shown in FIGS. 7 to 10, when the pocket plate 6 is made of resin, the pocket plate 6 is formed integrally with the stator body 1 made of resin, and the pocket portion 8 is also made of resin. Will be. Therefore, the corners 12 a and 12 b are provided in the pocket 8 in order to increase the strength of the pocket 8. The corners 12a and 12b are used to reinforce the inner corners by dispersing the stress generated in the inner corners by making the inner corners of the pocket portion 8 rounded in a quarter circle or arc shape in cross section. Of the four inner corners of the part 8, the inner corners are provided on both inner and outer sides (inside and outside) of the strut engagement surface 13 that supports the strut 9. However, according to the conventional stator described above, the corner radius 1 is formed at the inner corner of the pocket 8 as described above.
Even when the two-way clutch 12a is provided, stress concentration may occur when the one-way clutch 5 is locked, and therefore, a countermeasure different from the above countermeasure is desired. SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a stator which can effectively suppress the occurrence of stress concentration in a pocket when a one-way clutch is locked. And In order to achieve the above object, the present invention provides a stator having a notch type one-way clutch, wherein a strut as a component of the one-way clutch has a spherical bottom portion. Provide a convex spherical portion on the bottom portion of the strut as
A corresponding concave spherical portion is provided on the inner surface of the pocket for accommodating the strut. According to the stator of the present invention having the above-described structure, the strut has a spherical bottom portion, a convex spherical portion is provided on the bottom surface of the strut, and the strut corresponds to the inner surface of the pocket portion for accommodating the strut. Since the concave spherical surface portion is provided, a strut support structure in which both spherical surface portions are slidably in contact with each other is formed. Therefore, when a load is applied to the spherical strut support structure at the time of clutch locking, the stress is widely dispersed and generated. The proposal includes the following technical items. That is, in order to achieve the above object, one of the stators proposed in the present application is a notch type stator assembly (Ass'y) in which a strut bottom shape is spherical and a strut-inserted pocket portion. The strut has a spherical shape which is larger than the size of the strut ball so that the strut can be inserted. And the pocket portion into which the strut is inserted has a spherical shape larger than that of the strut. According to these configurations, the stress generated in the resin pocket during locking can be reduced by making the strut bottom spherical and the resin pocket into which the strut is inserted into a spherical shape. In addition, by making the contact between the strut and the pocket a spherical surface, stress concentration is prevented, and the strut and the resin pocket always come into spherical contact even in all postures of the strut, and the stress generated locally due to one-side contact etc. Prevention is also possible. Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a cross section of a main part of a stator according to an embodiment of the present invention. In this stator, a notch type one-way clutch 5 is configured as follows. That is, first, the end face 1 of the stator body 1
The strut 9 accommodated in the pocket portion 8 provided in the strut 9 is provided. The strut 9 has a spherical bottom portion, and a convex spherical portion 15 is provided on the bottom surface of the strut 9. Correspondingly, a concave spherical surface portion 20 is provided on the inner bottom surface of the pocket portion 8, and a strut support structure in which the spherical surfaces 15, 20 are in slidable contact with each other is formed. The strut 9 has a projecting piece-shaped engaging portion 1 on the side of the flat portion 16 of the hemispherical portion 14 having the convex spherical portion 15.
7, a coil-shaped spring 10 for elastically urging the engaging portion 17 upward in the figure is disposed below the engaging portion 17 in the figure. On the end face 7a of the notch plate 7, an engaging recess 11 into which an engaging portion 17 of the strut 9 is engaged in one direction.
That is, the engaging recess 11 is provided with an engaging-side inner wall 11a having a relatively steep rising angle in one circumferential direction and a non-engaging-side inner wall 11b having a relatively steep rising angle. Is provided on the other side in the circumferential direction. Reference numeral 23 denotes a support plate fixed to the stator main body 1, and the support plate 23 is provided between the stator main body 1 and the notch plate 7 so as to be relatively rotatable. FIGS. 2A and 2B show the strut 9 in a single piece state. FIG. 2A is a plan view, FIG. 2B is a front view, and FIG. 2C is a view in the direction of arrow C in FIG. Each is shown. The strut 9 is obtained by integrally forming the projecting piece-shaped engaging portion 17 on the flat portion 16 side of the hemispherical portion 14 having the convex spherical portion 15 as described above. Chamfered portions 18 and 19 are formed on the upper surface and the left and right side surfaces, respectively, so that the engaging portion 17 smoothly enters and leaves the engaging concave portion 11. FIG. 3 shows one of the pockets 8 for accommodating the strut 9.
A portion (engaging portion housing portion) 21 for housing the engaging portion 17 of the strut 9 so as to be able to protrude and retract outside the concave spherical portion 20.
And a vertical hole-shaped portion (spring accommodation portion) 22 for accommodating the spring 10. In the stator provided with the one-way clutch 5 having the above-described structure, the strut 9 has a spherical bottom portion and a convex spherical portion 15 is provided on the bottom surface of the strut 9. Since the concave spherical surface portion 20 is provided on the inner bottom surface of the portion 8,
As described above, the strut support structure is formed in a state where the two spherical portions 15, 20 are slidably in contact with each other. Therefore, since a load at the time of clutch locking acts on the spherical strut support structure, stress is widely dispersed and generated. Therefore, the stress generated in the pocket portion 8 when the clutch is locked can be reduced, and the concentration of stress in the pocket portion 8 when the clutch is locked can be prevented. In addition, since the strut 9 and the pocket portion 8 are always in spherical contact in any posture of the strut 9, it is possible to prevent stress concentration from occurring due to the strut 9 hitting one side or the like. The present invention has the following effects. That is, in the stator according to the present invention having the above-described structure, the strut has a spherical bottom portion, a convex spherical portion is provided on the bottom surface of the strut, and an inner surface of the pocket portion for accommodating the strut. Is provided, a strut support structure is formed in which both spherical portions are in slidable contact with each other. Therefore, since a load at the time of clutch locking acts on the spherical strut support structure, stress is widely dispersed and generated. Therefore, the stress generated in the pocket portion when the clutch is locked can be reduced, and the concentration of stress in the pocket portion when the clutch is locked can be prevented. Further, since the strut and the pocket portion are always in spherical contact in any posture of the strut, it is possible to prevent the occurrence of stress concentration due to the strut hitting one side or the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a main part of a stator according to an embodiment of the present invention. FIG. 2 is a diagram showing struts in the stator, (A) is a plan view thereof, and (B) is Is the front view, (C)
3 is a view showing a pocket portion in the stator, FIG. 3 (A) is a plan view thereof, and FIG. 3 (B) is a cross-sectional view thereof. FIG. 4 is a partially cutaway front view of a conventional stator. FIG. 5 is a sectional view taken along line XX in FIG. 4. FIG. 6 is an enlarged sectional view taken along line YY in FIG. 4. FIG. 7 is a front view of a stator body provided in a stator according to another conventional example. 8 is a sectional view taken along the line Z-O-Z in FIG. 7. FIG. 9 is a rear view of the stator body. FIG. 10 is an enlarged sectional view of a main part showing an assembled state of the stator. 6a, 7a End face portion 2 Inner ring 3 Blade 4 Outer ring 5 One-way clutch 6 Pocket plate 7 Notch plate 8 Pocket portion 9 Strut 10 Spring 11 Engagement concave portion 11a Engagement side inner wall 11b Non-engagement side inner wall 12a, 12b Corner radius 13 Strut bite Mating surface 14 hemispherical portion 15 convex spherical portion 16 flat portion 17 engaging portion 18, 19 chamfered portion 20 concave spherical surface portion 21 engages receiving portion 22 spring accommodating portion 23 Support plate

Claims (1)

Claims 1. A stator having a notch type one-way clutch (5), wherein a strut (9), which is a component part of the one-way clutch (5), has a spherical bottom portion and has a spherical shape. ), A convex spherical portion (15) is provided on the bottom surface portion, and a corresponding concave spherical portion (20) is provided on the inner surface of the pocket portion (8) accommodating the strut (9). Stator.