JP2001349410A - Stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator which can suppress the large raise of a strut 8 by a spring 9 when an engagement recess 10 overlaps the strut 8, suppress the trailing of the strut 8 by the interference with a notch plate 6 and the strong strike on an inner surface of a pocket part 7 of the stator body 1, and suppress generation of the wear on an inner surface of the pocket part 7. SOLUTION: In this stator comprising the strut 8 stored in the pocket part 7 provided in the stator body 1 together with the spring 9, and the notch plate 6 assembled with the stator body 1 in a relatively rotatable manner and provided with the engagement recess 10 with the strut 8 engaged therewith in one rotational direction, the length A of the engagement recess 10 is set to be shorter than the length B of the strut 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a strut 57 accommodated together with a spring 56 in a pocket portion 55 provided in a stator main body 52, and a strut 57 combined with the stator main body 52 so as to be relatively rotatable. A notch type one-way clutch 54 having a notch plate 53 provided with an engagement recess 58 that engages in the rotational direction.
Is known.

However, in the conventional stator 51, as shown, the length A of the engaging recess 58 provided in the notch plate 53 is longer (larger) than the length B of the strut 57 engaging with the notch plate 53. Because of the settings, there are the following inconveniences.

That is, as described above, the length A of the engagement recess 58 provided in the notch plate 53 is the length B when the strut 57 in the idling state enters the pocket 55.
When the engagement recess 58 and the strut 57 overlap with each other, the strut 57 is pushed upward by the spring 56 and greatly lifted as shown by a dotted line in FIG. 57a interferes with the inner surface of the engaging recess 58, and the strut 57 is dragged in the rotational direction by this interference, and strongly abuts on the inner tip surface (also referred to as the anti-meshing surface) 55a of the pocket portion 55. Therefore, by repeating this contact, the pocket 55
Wear on the tip end surface 55a of the clutch 5
The resistance at the time of idling of the tire 4 increases, which may affect the engagement at the time of locking. Also, when the raised strut 57 returns to the pocket portion 55, the inner bottom surface 5 of the pocket portion 55
5b, and the contact is repeated, causing abrasion on the bottom surface 55b of the pocket portion 55, thereby increasing the resistance of the clutch 54 during idling and possibly affecting the engagement during locking. .

[0005]

SUMMARY OF THE INVENTION In view of the above points, the present invention can prevent the strut from being greatly lifted by the spring when the engagement recess and the strut overlap, so that the strut can be connected to the notch plate. It is an object of the present invention to provide a stator that can suppress the inner surface of a pocket portion of a stator body from being strongly dragged by being dragged by interference of the stator body, thereby suppressing the occurrence of wear on the inner surface of the pocket portion. .

[0006]

In order to achieve the above object, a stator according to the present invention is provided with a strut housed together with a spring in a pocket portion provided in a stator body, and is combined with the stator body so as to be relatively rotatable. In a stator having a notch type one-way clutch including a notch plate provided with an engagement recess in which a strut is engaged in one rotation direction, the length of the engagement recess is set to be shorter than the length of the strut. It is a feature.

In the stator according to the present invention having the above-described structure, the length of the engaging recess provided in the notch plate is set shorter (smaller) than the length of the strut engaged with the notch plate. When the position of the recess and the strut overlap, the strut pushed by the spring is the end surface of the notch plate at both ends (the surface other than the engagement recess).
Contact Therefore, it is possible to prevent the strut from rising greatly so as to enter the engagement recess. In addition, the present invention having such a content is applied to a notch plate which is an assembly part of a notch type stator.
The notch width of the notch plate engaged with the strut is shorter than the length of the strut.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an entire cross section of a stator according to an embodiment of the present invention. FIG. 2 shows an enlarged cross section taken along the line CC of FIG. FIG. 3A is a partial plan view of the notch plate 6, and is a view in the direction of arrow F in FIG.
(B) is a side view of the notch plate 6.

As shown in FIG. 1, a stator according to this embodiment first includes a stator body 1 made of a resin such as phenol resin having an annular shape, and the stator body 1 has an inner ring (shell or stator shell). (Also called)
2, a blade (also referred to as a blade) 3 and an outer ring (also referred to as a core or a stator core) 4 are integrally provided, and a resin-made pocket plate 5 having an annular shape is integrally formed on the inner peripheral side of the inner ring 2. In addition, a notch plate 6 is combined with the inner peripheral side of the stator main body 1 so as to be relatively rotatable. The notch plate 6 is formed in a ring shape with a predetermined metal, and is formed to have a substantially L-shaped cross section integrally with a cylindrical portion 6a having a spline 6b formed on an inner peripheral surface and a flange portion 6c.

As shown in FIG. 2, a required number of pockets 7 are arranged in an end face 5a of the pocket plate 5 as a space for accommodating struts 8 and springs (also referred to as return springs or return springs) 9. The strut 8 is supported by a spring 9 and is swingably accommodated in each of the pocket portions 7. on the other hand,
A required number of engaging concave portions 10 are provided in an end surface portion 6d of the flange portion 6c of the notch plate 6 facing the end surface portion 5a of the pocket plate 5 (e.g., twelve equal positions, FIG. 3).
), One inner wall 10a in the rotation direction of the engagement concave portion 10.
However, it is formed with a relatively steep rising angle so that the strut 8 is engaged with the strut 8. On the other hand, the other inner wall 10b in the rotation direction of the engagement concave portion 10 is formed with a relatively gentle rising angle so that the strut 8 can get over the inner wall 10b. Therefore, this strut 8
When the notch plate 6 attempts to rotate relative to the pocket plate 5 in the direction D in the drawing due to the engagement structure of the engagement recess 10, the strut 8 engages with one inner wall 10 a of the engagement recess 10 to relatively rotate. The rotation is prevented, and only the relative rotation in the opposite direction E is permitted, whereby the notch type one-way clutch 11 is formed.

Each of the struts 8 is formed of a predetermined metal, and is always disposed in the pocket portion 7 and swings in a flat base portion 8a.
And an inclined flat-shaped engaging portion 8b that engages with the engaging concave portion 10 of the notch plate 6 at the time of projecting and retracting, and is formed to have a substantially L-shaped or substantially L-shaped cross section. The end (the lower end in the figure) of the base 8a is formed in a circular or semicircular cross section so that the strut 8 can easily swing, and is rounded (also referred to as a radius). The end (the left end in the figure) is formed in a flat shape so that when the end is engaged with one inner wall 10a of the engagement recess 10 of the notch plate 6, the end comes into surface contact. In addition, this strut 8
Is formed on the notch plate 6 side (upper surface in the drawing) so that the slope 8c of the distal side slope 8c has a smaller inclination angle than that of the base side slope 8d, so that the clutch 11 as shown in FIG. During the idle rotation, the tip-side slope 8 c is pressed against the notch plate 6 by the elasticity of the spring 9 and comes into surface contact with the end face 6 d of the notch plate 6. Further, a portion 8e at the boundary between the distal-side slope 8c and the proximal-side slope 8d is formed in an arc-shaped cross section so as to disperse the generated stress, and is rounded (also referred to as radius).

Each of the engagement recesses 10 provided on the end face 6 d of the flange portion 6 c of the notch plate 6 has a length (also referred to as a circumferential length or a notch width) A of the strut 8.
(Also referred to as a circumferential length, also referred to as a strut width) B. As described above, the length of the strut 8 is a length when the strut 8 enters the pocket portion 7 during idling as described above, and is a length of a surface of the strut 8 on the side of the notch plate 6. Then, the slope 8 c on the tip end side of the strut 8 is the end face 6 of the notch plate 6.
This is the circumferential length of the surface on the side of the notch plate 6 at the inclination angle in the state of surface contact with d.

The pocket portion 7 is open at the end face portion 5a of the pocket plate 5. One of the inner surfaces of the pocket portion 5 in the direction of rotation supports the strut 8 at its base portion 8a when the clutch 11 is engaged. Surface (also referred to as strut engagement surface or strut support surface) 7a
Both ends (not shown) in the width direction of the engagement surface 7a are each concavely rounded (also referred to as a radius) in a plane arc shape in order to disperse the stress when supporting the strut 8. Have been.

A swing angle limiting portion (also referred to as a swing stopper) 12 for limiting the swing of the strut 8 to a predetermined angle is integrally formed inside the pocket portion 7. On the side of the engagement surface 7a of the angle limiting portion 12, the strut 8 is connected to the anti-engagement surface 7b in the pocket portion 7.
A movement limiter (also referred to as a movement stopper) 14 for limiting movement in the direction is integrally formed, and a spring with a bottomed hole is provided on an end surface (upper surface in FIG. 2) 12 a of the swing angle limiter 12. The mounting portion 13 is open, and a spring 9 made of a coil spring is also provided in the bottomed hole-shaped spring mounting portion 13 provided in the axial direction (the vertical direction in FIG. 2) of the stator. It is attached to expand and contract in the direction.

The swing angle limiting portion 12 is formed in a dam shape or an inner shelf shape over the entire width of the pocket portion 7. The movement limiting portion 14 is also formed in a dam shape and an inner shape over the entire width of the pocket portion 7. It is shaped like a shelf or step. Swing angle limiter 12
The end surface 12a of the movement restricting portion 14 and the end surface 14a of the movement restricting portion 14 have the same height and are formed to be flush with each other, and the strut 8 has a rising surface 14b facing the base 8a of the strut 8. The base 8a is formed in a tapered shape so that the base 8a is brought into surface contact when moved, and the space between the tapered rising surface 14a and the meshing surface 7a causes the base 8a of the strut 8 to swing. It is formed so as not to move at all. The anti-meshing surface 7b is a surface facing the meshing surface 7a, and is formed in a plane arc shape.

The spring 9 mounted on the spring mounting portion 13 is interposed between the bottom surface of the spring mounting portion 13 and the engaging portion 8b of the strut 8, so that the strut 8 has its base 8
The spring 9 swings while compressing and compressing the spring 9 against the elasticity of the spring 9 around the end (also referred to as a strut end) of the spring 9, and returns to the initial movement posture by the elasticity of the spring 9.

The stator according to the present embodiment is characterized in that the following effects are achieved by the above-described configuration.

That is, in the stator according to this embodiment, the end face 6 of the flange 6 c of the notch plate 6 is provided.
Since the circumferential length A of the engaging concave portion 10 provided at d is set shorter than the same length B of the strut 8 engaging with the engaging concave portion 10, the circumferential position of the engaging concave portion 10 and the strut 8 is set. The struts 8 pushed by the springs 9 when they overlap each other have flanges 6c of the notch plate 6 at both ends.
Contact with the end surface portion 6d so as to straddle the engagement concave portion 10. Therefore, it is possible to prevent the strut 8 from being greatly lifted so as to enter the engagement concave portion 10, so that the strut 8 is dragged by the interference with the notch plate 6 and the anti-meshing surface 7 b and the bottom surface of the pocket portion 7 of the stator main body 1. Strong contact with the inner surface of 7C or the like can be suppressed, so that the occurrence of wear on the inner surface of the pocket portion 7 can be suppressed. Therefore, the one-way clutch 11
It is possible to prevent the operation of the device from being hindered.

[0020]

The present invention has the following effects.

That is, in the stator of the present invention having the above-described structure, the length of the engaging recess provided on the notch plate is set shorter than the length of the strut engaging with the notch plate. When the position of the strut overlaps with the strut, the strut pushed by the spring is the end surface of the notch plate at both ends (the surface other than the engagement recess).
To make contact over the engaging recess. Therefore, it is possible to prevent the strut from rising largely so as to enter the engagement recess, and to prevent the strut from strongly contacting the inner surface such as the front end surface or the bottom surface of the pocket portion, thereby causing the inner surface of the pocket portion to be worn. Can be prevented. Accordingly, it is possible to prevent the operation of the one-way clutch from being hindered due to the wear generated on the inner surface of the pocket portion.

[Brief description of the drawings]

FIG. 1 is a sectional view of a stator according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along line CC in FIG.

3A is a partial plan view of the notch plate, and is a view in the direction of arrow F in FIG. 3B, and FIG. 3B is a side view of the notch plate.

FIG. 4 is a partial sectional view of a conventional stator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator main body 2 Inner ring 3 Blade 4 Outer ring 5 Pocket plate 5a, 6d End face part 6 Notch plate 6a Cylindrical part 6b Spline 6c Flange part 7 Pocket part 7a Meshing surface 7b Anti-meshing surface 7c Bottom surface 8 Strut 8a Base 8b 8c Front-side slope 8d Base-side slope 8e Boundary part 9 Spring 10 Engagement concave part 10a, 10b Inner wall 11 One-way clutch 12 Swing angle limiting part 12a, 14a End face 13 Spring mounting part 14 Movement limiting part 14b Rising part

Claims (1)

[Claims] 1. A strut (8) housed in a pocket (7) provided in a stator body (1) together with a spring (9), and the strut (8) is combined with the stator body (1) so as to be relatively rotatable. 8) having a notch plate (6) provided with an engagement recess (10) engaged in one rotation direction, wherein the length (A) of the engagement recess (10) is set to the strut (8). A length shorter than the length (B) of the stator.