JP2001193816A - Method for making wheel stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for making a wheel stator with which the wheel stator can inexpensively assembled. SOLUTION: A wheel stator having a one-way clutch thereinside is used for a torque converter. In a making method for the wheel stator, a circular recession 111 having a hole 114 at its center is formed on a wheel stator main body 110 for arrangement of the one-way clutch 120. A plurality of projected bars 131 are press-fitted into an inner peripheral surface 112 of the circular recession 111, which projected bars 131 are partially formed on an outer peripheral surface of the one-way clutch 120, while each having a diameter exceeding the inner peripheral surface 112. Cut dusts generated from the inner peripheral surface 112 at the time of press-fitting are housed by a circular groove 113 formed on the inner peripheral surface corresponding to the lower end of the projected bar 131, when a lower end surface 134 of the one-way clutch 120 is abutted against a bottom surface of the circular recession 111.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a wheel stator disposed in a torque converter used in an automatic transmission.

[0002]

2. Description of the Related Art Conventionally, a wheel stator is shown in FIGS.
As shown in the figure, the structure is such that many parts are combined. The wheel stator 500 includes a torque converter (not shown) used for a transmission of an automobile, and the like.
It is rotatably supported in one direction by a one-way clutch 510 disposed inside the wheel stator body 501 to a housing (not shown) of the torque converter. Generally, the torque converter includes a formed pump (not shown) connected to an input shaft, a turbine (not shown) connected to an output shaft, and the wheel stator 500 described above. In the torque converter, the fluid sealed in the torque converter is caused to flow in one rotation direction and to the turbine side by a blade formed in a pump rotated by a rotation drive from an input shaft. The turbine is rotated in the same rotational direction as the pump by the action of the blade formed on the turbine by the flow of the fluid. The fluid that has acted on the blades of the turbine is subsequently supplied to the pump again by the operation of the blade portion 502 formed on the wheel stator body 501 and is effectively used again.
Increase the ratio of transmission efficiency between pump and turbine. The wheel stator 500 has a shape
When the rotation of the pump is larger than the rotation of the turbine (when the turbine stops or rotates at a low speed), the one-way clutch 510
The force from the fluid acts in the non-rotational direction of, and it is in a stopped state. On the other hand, when the rotation of the turbine is going to exceed the rotation of the pump (during high-speed rotation), the wheel stator 50
0 is such that a force from the fluid acts in the direction of rotation of the one-way clutch 510 to cause the rotation and prevent the fluid from flowing from the turbine to the pump to further increase the rotation of the pump.

[0003] The wheel stator 500 has a convex portion 50 which meshes with an outer race 511 having a large uneven portion on the outer peripheral surface which is a part of the one-way clutch 510.
3 is formed on the inner peripheral surface, and one-way clutch 510
And is rotatably supported in one direction. The one-way clutch 510 includes the outer race 511 described above, a clutch portion 513 including a plurality of pins 514, and an inner race 512 fitted to the housing.
The clutch 513 sandwiched between the outer race 511 and the inner race 512 includes a plurality of pins 514 connected to the connecting member 5.
15 are connected so as to be inclined with respect to the straight line toward the center of rotation.

[0004] In order to suppress relative movement of the one-way clutch 510, a wheel stator 500 is provided.
Two lid members 520 for closing both end surfaces of the one-way clutch 510 and two snap rings 521 that suppress the outward movement of the lid member 520 and fit into the wheel stator body 501 are arranged.

[0005]

However, in the one-way clutch 510, it is necessary to form the intermittently relatively large convex portion 503 by cutting in order to connect the outer race 511 in the radial direction. Yes, the manufacturing process is costly. Further, in the wheel stator 500, since the axial connection between the wheel stator body 501 and the one-way clutch 510 is performed by the two lid members 520 and the snap ring 521, the number of manufacturing steps is increased, and the cost is further increased. .

Accordingly, an object of the present invention is to provide a method for manufacturing a wheel stator that enables the wheel stator to be assembled at low cost.

[0007]

According to a first aspect of the present invention, there is provided a method of manufacturing a wheel stator having a one-way clutch therein for use in a torque converter. A circular recess having a hole in the center to be disposed is formed, and a plurality of axially extending portions formed on the inner peripheral surface of the circular recess on a part of the outer peripheral surface of the one-way clutch and having a diameter larger than the inner peripheral surface. When the lower end surface of the one-way clutch comes into contact with the bottom surface of the circular concave portion while the convex ridge portion is being press-fitted, the annular groove formed on the inner peripheral surface at a position corresponding to the lower end portion of the convex ridge portion is press-fitted. The one-way clutch is combined with the wheel stator body by press-fitting because the chips on the inner peripheral surface generated by It is possible to produce a Rusuteta. In addition, since chips generated by press-fitting can be completely confined in the annular groove, they can cause shaft misalignment and axis inclination due to chips, and operate even if the wheel stator is combined with other parts and operated in the automatic transmission. There will be no failure.

According to a second aspect of the present invention, in the first aspect of the present invention, before the one-way clutch is press-fitted into the wheel stator body, the outer diameter of the circular concave portion is made slightly smaller than that of the ridge portion as a preliminary step. Since a cylindrical punch having a second protruding portion formed larger than the inner peripheral surface is press-fitted into the circular concave portion, and a concave ridge portion corresponding to the convex ridge portion is formed on the inner peripheral surface. Since the load at the time of press-fitting the one-way clutch into the concave portion is reduced by the preliminary process, it is possible to prevent the wheel stator body from being damaged due to excessive load due to press-fitting.

Further, according to the third aspect of the present invention, in the first and second aspects of the present invention, a restraining jig for holding an outer peripheral surface of the circular concave portion when the press-fitting into the circular concave portion is provided. Therefore, the deformation of the outer peripheral surface of the circular concave portion due to the press-fitting of the one-way clutch or the cylindrical punch can be suppressed, so that the one-way clutch can be press-fitted to the wheel stator body with high accuracy.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, a second annular groove is formed below the ridge portion for accommodating chips on the inner peripheral surface generated during press-fitting. As a result, press-fitting is carried out while accommodating chips generated during press-fitting, so that chips do not enter between the outer peripheral surface of the one-way clutch and the inner peripheral surface of the circular concave portion and are accurately pressed into the one-way clutch and the wheel stator body. can do.

[0011]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a wheel stator according to the method for manufacturing a wheel stator of the present invention.
FIG. 2 is an enlarged view of another part of FIG. FIG. 3 is a configuration diagram of a preliminary step according to the method for manufacturing a wheel stator of the present invention. FIG. 4 is a sectional view taken along line AA of FIG.

First, the structure of a wheel stator 100 according to an embodiment of the present invention will be described. As shown in FIG. 1, a wheel stator 100 includes a wheel stator body 110 and a wheel stator body 11.
The one-way clutch 120 is press-fitted into the cylinder 0, and the lid member 160 and the snap ring 161 restrict the movement of the one-way clutch 120 in the direction opposite to the press-fitting direction.

The wheel stator body 110 is formed with a circular recess 111 having a hole 114 at the center, and a blade 118 on the outer periphery thereof for flowing the hydraulic oil of the torque converter to an appropriate position. The circular recess 111 has an inner peripheral surface 112 and an annular groove 11 in a part of the inner peripheral surface 112.
3 and a hole 114 formed at the center of the bottom 115. The wheel stator body 110 is formed of an aluminum material. An engagement surface 117 having the same diameter as the inner peripheral surface 112 is formed below the annular groove 113. The hole 114 is for inserting a shaft (not shown) protruding from a housing for pivotally supporting the wheel stator 100.

The one-way clutch 120 includes a ring-shaped outer race 130, a ring-shaped inner race 140 smaller than the outer race 130, and a clutch 150 sandwiched between the outer race 130 and the inner race 140. Is done. The ring-shaped outer race 130 is formed with a plurality of ridges 131 extending in the axial direction from above the outer periphery, and the outer diameter thereof is set to be larger than the inner diameter of the inner peripheral surface 112. An annular groove 132 having a smaller capacity than the annular groove 115 is provided below the ridge 131.
And a guide surface 133 formed to have substantially the same diameter as the inner diameter of the inner peripheral surface 112. Here, when the one-way clutch 120 is press-fitted into the wheel stator body 110, the lower end of the protruding ridge portion 131 projects into the annular groove 113, and the guide surface 133 is fitted to the engagement surface 117. In addition, the lower end surface 134 of the outer race 130 is
15.

The inner race 140 has a small-diameter portion 141 which is inserted into the hole 114 of the wheel stator body 110, and has a gear which meshes with a gear (not shown) provided on a shaft protruding from the housing. 142 is formed, and pivotally supports the wheel stator 100 when the wheel stator body 110 and the one-way clutch 120 are combined.

As shown in FIG. 4, the clutch unit 150 includes a plurality of pins 151 and a connecting member 152 for holding the pins 151. The pin 151 is inclined in the longitudinal direction with respect to the straight line in the direction of the rotation center of the one-way clutch 120, and both end surfaces are in contact with the inner peripheral surface of the outer race 130 and the outer peripheral surface of the inner race 140, respectively. When the outer race 130 tries to rotate counterclockwise in FIG. 4 due to this contact, the pin 151 is pinched between the inner peripheral surface and the outer peripheral surface, and the rotation is stopped. It is rotatable. In addition, the outer race 130 is the wheel stator body 1
It is formed of, for example, an iron material that is harder than 10.

The one-way clutch 120 press-fitted into the wheel stator body 110 has a snap ring 161 fitted in the wheel stator body 110 to prevent the one-way clutch 120 from falling off in the direction opposite to the press-fitting direction as shown in FIG. In the present embodiment, the wheel stator body 1
Although the snap ring 161 is provided in the 10 to hold the one-way clutch 120, a configuration without the snap ring 161 may be adopted because the snap ring 161 is press-fitted.

In the wheel stator 100, the clutch part 150 is formed by the outer race 130 and the inner race 1.
A lid member 160 for preventing the lid member 160 from dropping upward from the gap between the wheel stator body 110 and the wheel stator body 110 is engaged with the housing.
And the bottom part 115 of the same.

Next, the assembly of the wheel stator 100 will be described. As shown in FIG. 3, first, prior to press-fitting the one-way clutch 120 into the wheel stator body 110, a restraining jig 310 for restraining the outer peripheral surface 116.
Is arranged. The restraining jig 310 holds the inner peripheral surface 1 during press-fitting.
The member 12 is prevented from spreading outward by the pressure from the inner surface 12 so that a member to be press-fitted easily penetrates the inner peripheral surface 112. Here, the restraining jig 310 was used,
This is not necessary if the wheel stator body 110 is sufficiently strong and does not spread outward by press fitting.

Subsequently, as a preliminary step, a cylindrical punch 301 having a second protruding portion 302 formed around the tip is pressed into the wheel stator body 110. Second ridge 3
No. 02 is formed smaller than the protruding ridges 131 of the outer race 130 and has the same number at equal angular intervals. When the punch 301 is press-fitted, the inner peripheral surface 112 is shaved or the material flows to form irregularities along the ridge 302, and when the annular groove 113 is reached, the punch 301 is pulled out. In addition, depending on the case where the ridge portion 131 is relatively small, the material of the wheel stator main body 110, or the like, the one-way clutch 120 may be directly press-fitted into the wheel stator main body 110 without this preparatory step.

After the irregularities are formed on the inner peripheral surface 112 in the preliminary step, the one-way clutch 120 is press-fitted so that the concave and convex portions 131 of the irregularities coincide with each other. When there is no preliminary step, the one-way clutch 120 is pressed into the wheel stator body 110 at an arbitrary position. The material of the inner peripheral surface 131 cut by press fitting is
32 and pushed into the lower annular groove 113 as it is. The shaved material includes the inner peripheral surface 112 and the ridge 131,
Engaging surface 117 and guide surface 133, lower end surface 134 and bottom 1
The annular grooves 113 and 13 which are spaces completely sealed at 15
By being accommodated in the interior 2, it does not go outside.

Finally, a snap ring 1 for reinforcement is used.
61 is fixed to the wheel stator main body 110 so as to regulate the direction opposite to the press-fit direction of the one-way clutch 120,
Further, a cover member 160 is provided and pivotally supported on a shaft of the housing.

The outer race 110 shown in FIG.
Although the knurled eyes 112 are formed, these may be formed so as to sufficiently receive the driving force, and those which do not have a sufficient driving force may be connected by press-fitting only without forming the knurled eyes. Also, instead of forming knurled eyes,
The outer peripheral surfaces of the large diameter hole 102 and the outer race 110 may be formed in a polygonal shape.

[0024]

As described above, in the method of manufacturing parts according to the present invention, the one-way clutch is combined with the wheel stator body by press-fitting, so that assembly is easy and the wheel stator can be manufactured at low cost. In addition, since chips generated by press-fitting can be completely confined in the annular groove, they can cause shaft misalignment and axis inclination due to chips, and operate even if the wheel stator is combined with other parts and operated in the automatic transmission. There will be no failure.

Further, since the load at the time of press-fitting the one-way clutch into the circular concave portion is reduced by the preliminary step, it is possible to prevent the wheel stator body from being damaged due to excessive load due to press-fitting.

Further, in order to suppress deformation of the outer peripheral surface of the circular concave portion due to press-fitting of a one-way clutch or a cylindrical punch,
The one-way clutch can be accurately pressed into the wheel stator body.

Further, since the press-fitting is performed while accommodating the chips generated at the time of press-fitting, the chips do not enter between the outer peripheral surface of the one-way clutch and the inner peripheral surface of the circular concave portion and are accurately connected to the one-way clutch and the wheel stator. It can be pressed into the body.

[Brief description of the drawings]

FIG. 1 is a sectional view of a wheel stator according to a method for manufacturing a wheel stator of the present invention.

FIG. 2 is an enlarged view of another part of FIG.

FIG. 3 is a configuration diagram of a preliminary step according to the method for manufacturing a wheel stator of the present invention.

FIG. 4 is a sectional view taken along line AA of FIGS.

FIG. 5 is a sectional view of a conventional wheel stator.

[Explanation of symbols]

100: Wheel stator, 110: Wheel stator body, 111: Circular recess, 112: Inner peripheral surface, 113:
Annular groove, 114 ... hole, 115 ... bottom, 116 ... outer peripheral surface,
117: engagement surface, 118: blade, 120: one-way clutch, 130: outer race, 131: ridge,
132 ... annular groove (second), 133 ... guide surface, 134 ...
Lower end surface, 140: inner race, 141: small diameter portion, 1
42 ... gear, 150 ... clutch part, 151 ... pin, 15
2 ... connecting member, 160 ... lid member, 161 ... snap ring, 301 ... punch, 302 ... ridge (second), 310
… Restraining jig

Claims (4)

[Claims] 1. A method of manufacturing a wheel stator having a one-way clutch therein for use in a torque converter, wherein a circular recess having a hole at a center where the one-way clutch is disposed is formed in the wheel stator body, and the circular recess is formed. A plurality of ridges extending in the axial direction and having a diameter larger than the inner peripheral surface are press-fitted into the inner peripheral surface of the one-way clutch on a part of the outer peripheral surface of the one-way clutch. When the lower end surface of the one-way clutch abuts, an annular groove formed on the inner peripheral surface at a position corresponding to the lower end portion of the ridge portion accommodates chips on the inner peripheral surface generated by press-fitting. The manufacturing method of the wheel stator characterized by the above. 2. A second step in which the outer diameter of the circular recess is slightly smaller than that of the ridge and larger than that of the inner peripheral surface as a preliminary step before the one-way clutch is pressed into the wheel stator body. 2. The wheel stator according to claim 1, wherein a cylindrical punch having a protruding portion is press-fitted into the circular recess, and a concave portion corresponding to the protruding portion is formed on the inner peripheral surface. Production method. 3. The method for manufacturing a wheel stator according to claim 1, wherein a restraining jig for holding an outer peripheral surface of the circular concave portion is provided at the time of press-fitting into the circular concave portion. 4. The wheel stator according to claim 1, wherein a second annular groove is formed below the ridge to accommodate the chips on the inner peripheral surface generated at the time of press-fitting. Method.