JP2002238202A - Motor joint and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor joint which can be fixed surely to a yoke and reduce the number of components, and to provide its manufacturing method. SOLUTION: In the motor joint and its manufacturing method, the motor joint 1 consists of a flange 1d formed in the outer peripheral part, and an inner cylinder 1e which is inserted in a penetrating hole 31d of a yoke 31, arranged inside a joint fixing part 31c, pushed to be spread, and engaged with a bottom of the joint fixing part 31c, and clamps the bottom together with the flange 1d.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor joint for connecting a cable to an armature shaft through a yoke of a motor in, for example, an electric seat device of an automobile.

[0002]

2. Description of the Related Art As this type of motor joint, a motor joint is inserted into a joint hole formed at an end of a yoke, and then a cap is put on the outside of the motor joint, and the cap is welded to the yoke. As a result, the motor joint was fixed to the yoke.

[0003]

In the above-mentioned device, since a cap of a part different from that of the motor joint is required, it is necessary to separately prepare a cap, which makes it difficult to reduce man-hours. Was. Also,
Poor welding may occur in the cap fixed to the yoke by welding, in which case there is a problem that the motor joint may be displaced or come off.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a motor joint which can be securely fixed to a yoke and can reduce the number of parts.

[0005]

Configuration of the Invention

[0006]

In a motor joint according to a first aspect of the present invention, a bottomed cylindrical joint fixing portion formed at an end of a yoke accommodating an armature and having a through hole formed at a bottom is provided. A motor joint attached to a joint fixing portion of a formed yoke, wherein the motor joint has a flange formed on an outer peripheral portion, and is inserted into a through hole of the yoke and arranged inside the joint fixing portion, and is spread. It is characterized in that it is configured to be locked to the bottom of the joint fixing part, and the flange and the inner cylinder part sandwiching the bottom of the joint fixing part are formed.

In the motor joint according to a second aspect of the present invention, in addition to the structure of the first aspect, an outer cylindrical portion which extends in the axial direction from the outer edge of the flange portion and is externally provided on the joint fixing portion is formed. It is characterized by having a configuration that is

A motor joint according to a third aspect of the present invention is characterized in that, in addition to the configuration of the first or second aspect, the inner cylindrical portion is fixed to the joint fixing portion by being thermally deformed. I have.

In the motor joint according to a fourth aspect of the present invention, in addition to any one of the first, second, and third aspects, the flange, the inner cylinder, and the outer cylinder are formed in an annular shape. It is characterized by having a configuration.

In the method of manufacturing a motor joint according to the fifth aspect of the present invention, the outer ring portion disposed outside the joint fixing portion, the inner ring portion disposed inside the joint fixing portion, A method of manufacturing a motor joint, comprising: a cable insertion hole to be disposed; and a motor joint attached to a joint fixing portion formed at an end of a yoke accommodating an armature, wherein one end of an inner ring plate is fixed by a joint. A first step of inserting the outer ring plate portion at a position facing the bottom of the joint fixing portion, by inserting the outer ring plate portion into a through hole formed in the portion;
A second step in which the yoke is extrapolated to a first jig having a heating section and the heating section is arranged separately from the inner peripheral portion of the joint fixing section, and a second jig which can abut on the motor joint is provided. Then, by pressing the motor joint and the yoke toward the first jig by the second jig, the inner ring plate portion is thermally deformed by the heating portion of the first jig and is spread outward. , And is characterized by the following.

In the method of manufacturing a motor joint according to claim 6 of the present invention, in addition to the structure of claim 5, the heating portion of the first jig has an end formed around the through hole of the joint fixing portion. A convex portion having substantially the same shape is formed, and a caulked portion that is thermally caulked inside the end by the convex portion of the first jig is formed on the inner ring plate portion. It is characterized by doing.

[0012]

In the motor joint and the method of manufacturing the same according to the present invention, the flange of the motor joint is arranged on the outer peripheral portion of the joint fixing portion, and the inner cylindrical portion is inserted into the through-hole of the yoke so that the joint portion of the joint fixing portion is formed. It is arrange | positioned inside, is expanded and is latched by the bottom part of a joint fixing part, and a collar part clamps the bottom part of a joint fixing part. Therefore, since the motor joint is directly fixed to the joint fixing portion, a cap as a separate component from the motor joint is not required.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

[0014]

1 to 8 show one embodiment of a motor joint and a method of manufacturing the same according to the present invention.

The motor 30 using the illustrated motor joint 1 mainly includes a yoke 31 and a gear case 3.
2, the first and second magnets 33 and 34, the armature 35, and the motor joint 1. The motor 30 is used to drive the sheet moving mechanism 50. The sheet moving mechanism 50 includes a pair of a gear box 51, a lead screw 52, and a nut member 53.

The yoke 31 has a cylindrical yoke main body 31a. First and second magnets 33 and 34 are attached to the inner peripheral portion of the yoke main body 31a so as to face each other. An end cap 31b is formed at one end of the yoke main body 31a. A bearing 36 is fixed inside the end cap 31b. One end of an armature shaft 37 provided on the armature 35 is inserted into the bearing 36. A cylindrical joint fixing portion 31c is formed at an end of the end cap 31b. Joint fixing part 31
A through hole 31d is formed at the center of c. The joint fixing portion 31c has an outer diameter d1 and an inner diameter d2 shown in FIG. The through hole 31d has an inner diameter dimension d3 also shown in FIG. A curved end portion 31d1 is formed around the through hole 31d of the joint fixing portion 31c. Yoke body 31a
Is formed with a flange 31e at the other end. The flange 31e is fixed to an end of the gear case 32 by a screw 38.

An armature shaft 37 is provided in the gear case 32.
Is rotatably supported at the other end. Gear case 3
2 is connected to one gear box 51 of the seat moving mechanism 50. The gearbox 51 has a built-in speed reduction mechanism that is meshed and connected to the other end of the armature shaft 37, and one lead screw 52 is connected to the output side of the speed reduction mechanism. The armature 35 includes an armature core 39 and a commutator 40 fixed on an armature shaft 37, respectively, and an armature coil 41 wound around the armature core 39 and electrically connected to the commutator 40. Two brushes are arranged around the commutator 40. The brushes are each electrically connected to a seat control circuit. When the seat switch provided in the seat control circuit is turned on to the forward side, the armature shaft 37 is rotated forward, whereas, when the seat switch is turned on to the backward side, the armature shaft 37 is rotated reversely. Armature shaft 37
Is formed at one end thereof with a cable connecting portion 37a having a square hole.

The motor joint 1 is fixed to a joint fixing portion 31c of the yoke 31. As shown in FIG. 2, the motor joint 1 mainly has a substantially cylindrical shape from a joint body 1a and a yoke coupling portion 1b. At the center of the motor joint 1, a cable insertion hole 1c is formed. An annular recessed connector fitting portion 1a1 is formed on an outer peripheral portion of the joint body 1a. The connector 81 provided on the power transmission member 80 is fitted into the connector fitting portion 1a1.
A cable 83 is rotatably accommodated in the power transmission member 80 in a case 82. One end of the power transmission member 80 is provided with a cable 83 by fitting the connector 81 into the connector fitting portion 1a1 of the motor joint 1.
Is inserted into the cable connecting portion 37a of the armature shaft 37 and connected to the armature shaft 37. The other end of the cable 83 of the power transmission member 80 is engaged with the speed reduction mechanism in the other gear box.

The yoke coupling portion 1b includes an outer ring plate portion 1d,
An inner ring portion 1e is provided. The outer ring plate portion 1d is formed to project from the joint body 1a in a cylindrical shape.
The outer ring plate 1d has an inner diameter d4 shown in FIG. The inner diameter d4 of the outer ring plate 1d is slightly larger than the outer diameter d1 of the joint fixing portion 31c. As shown in FIG. 3, three positioning portions 1d1, 1d1, 1d1 are formed on the inner peripheral surface of the outer ring plate portion 1d at intervals of 120 degrees on the circumference as shown in FIG. These positioning portions 1d1, 1d1, 1d1 are arranged along the length direction of the outer ring plate portion 1d, and project as small projections toward the center of the outer ring plate portion 1d as shown in FIG. . Since the inner diameter dimension formed by each of the positioning portions 1d1 is substantially equal to the outer diameter dimension d1 of the joint fixing portion 31c, when the motor joint 1 is attached to the joint fixing portion 31c, the motor joint 1 is connected to the joint fixing portion 31c. Has the function of centering without rattling.

The inner ring plate portion 1e is disposed inside the outer ring plate portion 1d and is formed so as to protrude in a cylindrical shape from the joint body 1a. The inner ring portion 1e has an inner diameter d6 with an outer diameter d5 shown in FIG. Inner ring plate 1
The inner diameter d5 of e is slightly smaller than the outer diameter d3 of the through hole 31d. After being inserted into the through-hole 31d, the inner ring 1e is fixed to the end 31d1 around the through-hole 31d by being heat-tightened from the inner periphery toward the outer ring 1d. A caulked portion 1e1 is formed.

The motor joint 1 having such a structure
Is manufactured by the steps shown in FIGS.
First, in a first step shown in FIG.
Is placed with the flange 31e down, and the motor joint 1 is covered on the joint fixing portion 31c. The outer ring plate 1d is arranged outside the joint fixing portion 31c, and the inner ring plate 1e is inserted into the through hole 31d. At this time, the three positioning portions 1d1, 1d1, 1d1 of the outer ring plate portion 1d
As a result, the motor joint 1 is centered and arranged on the joint fixing portion 31c.

Next, a second step shown in FIG. 6 is performed. In this second step, the inner diameter d of the inner ring plate portion 1e is
An inner ring portion insertion portion 61a having an outer diameter slightly smaller than 6 and a caulking portion 1e1 formed in the inner ring plate 1e having an outer diameter larger than the inner diameter d6 of the inner ring plate 1e. Heating section 61 having a caulking portion forming portion 61b for support and a support portion 61c having an outer diameter slightly smaller than the inner diameter d2 of the joint fixing portion 31c.
The first jig 60 having the following is used. In the first jig 60, a guide 60a that supports the opening of the yoke 31 on the flange 31e side is arranged so as to protrude above the table 60b.
The spring mechanisms 60c, 60c that press the yoke 31 upward by colliding with the flange 31e are accommodated in the base 60b. In this second step, the first jig 60
The yoke 31 is externally inserted into the heating portion 61, the inner ring portion insertion portion 61a of the heating portion 61 is fitted to the end of the inner ring plate portion 1e, and the support portion of the caulking portion 61 is fitted to the base of the joint fixing portion 31c. The caulking portion 61 is arranged in advance away from the inner peripheral portion of the joint fixing portion 31c by aligning the crimping portions 61c. At this time,
No current is supplied to the heating unit 61, and no heating is performed. Therefore, the yoke 31 and the motor joint 1
Is only supported by the heating unit 61 and the guide 60a.

Subsequently, a third step shown in FIG. 7 is performed. In the third step, the second joint having the protrusion 62a insertable into the cable insertion hole 1c of the motor joint 1 is provided.
Jig 62a is used. In the third step, the heating unit 61 is heated by supplying a current to the heating unit 61 of the first jig 60, and in this state, the cable insertion hole 1 c 1 of the motor joint 1 is inserted from above the yoke 31.
The protrusion 62a of the second jig 62 is pressed and inserted therein. With the second jig 62, the flange 31e of the yoke 31
It is pressed downward in the figure until it collides with 0b. Projection 62a
Collides with the tip of the heating unit 61. The inner ring portion insertion portion 61a of the heating portion 61 is inserted into the inner ring plate portion 1e, and the caulking portion forming portion 61b collides with the inner ring plate portion 1e, and the support portion 6e.
1c is inserted into the joint fixing portion 31c. Then, the caulking portion forming portion 6 of the heating portion 61 that has already been heated.
By 1b, the inner ring plate portion 1e is thermally swaged toward the outer ring plate portion 1d, so that a tightened portion 1e1 is formed in the inner ring plate portion 1e. Thereafter, the second jig 62 moves upward in FIG. 7 and the yoke 31 is pressed upward by the spring mechanisms 60c, 60c, as shown in FIG. The assembled body 70 in which the motor joint 1 is directly caulked and fixed to the yoke 31 by the caulking part 1e1 is obtained.

[0024]

As described above, according to the motor joint and the method of manufacturing the same according to the present invention, the flange of the motor joint is arranged on the outer peripheral portion of the joint fixing portion, and the inner cylindrical portion of the motor joint penetrates the yoke. It is inserted into the hole, arranged inside the joint fixing part, pushed out and locked on the bottom part of the joint fixing part, and the flange part clamps the bottom part of the joint fixing part. Therefore, since the motor joint is directly fixed to the joint fixing portion, a cap as a separate component from the motor joint is not required. Therefore, an excellent effect of being able to be reliably fixed to the yoke and reducing the number of parts is achieved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view showing a state in which a motor using an embodiment of a motor joint and a method of manufacturing the same according to the present invention is attached to a seat moving mechanism.

FIG. 2 is a sectional view of a single unit of the motor joint shown in FIG. 1;

FIG. 3 is a right side view of the motor joint shown in FIG. 2;

FIG. 4 is an enlarged view of a portion A in FIG. 3;

FIG. 5 is a cross-sectional view illustrating a first step of the motor joint and the method for manufacturing the motor joint shown in FIG.

FIG. 6 is a sectional view illustrating a second step of the motor joint and the method for manufacturing the motor joint illustrated in FIG. 1;

FIG. 7 is a sectional view illustrating a third step of the motor joint and the method for manufacturing the motor joint shown in FIG. 1;

FIG. 8 is a cross-sectional view of the motor joint shown in FIG. 1 and an assembly obtained by the method of manufacturing the motor joint.

[Explanation of symbols]

 Reference Signs List 1 motor joint 1c cable insertion hole 1d (flange) (outer cylinder) outer ring plate 1e (inner cylinder) inner ring 1e1 crimping part 31 yoke 31c joint fixing part 31d through hole 31d1 (end) end part 35 armature 60 first jig 61b (convex portion) crimping portion forming portion 61c heating portion 62 second jig

Claims (6)

[Claims] 1. A motor joint attached to a joint fixing portion of a yoke having a bottomed cylindrical joint fixing portion formed at an end portion of a yoke accommodating an armature and having a through hole formed in a bottom portion. In the motor joint, a flange formed on an outer peripheral portion and a flange inserted into a through hole of the yoke are disposed inside the joint fixing portion, and are spread and locked to the bottom of the joint fixing portion. A motor joint, wherein an inner cylinder portion sandwiching a bottom portion of the joint fixing portion is formed together with the flange portion. 2. The motor joint according to claim 1, wherein an outer cylindrical portion is formed to extend in an axial direction from an outer edge portion of the flange portion and to be externally provided on the joint fixing portion. 3. The motor joint according to claim 1, wherein the inner cylindrical portion is fixed to the joint fixing portion by being thermally deformed. 4. The method according to claim 1, wherein the flange, the inner cylinder, and the outer cylinder are formed in an annular shape.
The motor joint according to any one of the above. 5. An armature, comprising: an outer ring plate disposed outside the joint fixing portion; an inner ring plate disposed inside the joint fixing portion; and a cable insertion hole disposed in the center. A method of manufacturing a motor joint to be attached to a joint fixing portion formed at an end of a yoke containing the same, wherein one end of the inner ring plate portion is inserted into a through hole formed in the joint fixing portion. A first step of arranging the outer ring plate portion at a position facing the bottom of the joint fixing portion, extrapolating the yoke to a first jig having a heating portion, and connecting the heating portion to the inner periphery of the joint fixing portion. A second step of disposing in advance from the part, having a second jig that can abut on the motor joint,
A third step of pressing the motor joint and the yoke toward the first jig by the second jig, thereby thermally deforming the inner ring plate portion at the heating portion of the first jig and pushing it outward; A method for manufacturing a motor joint, comprising: 6. A heating portion of the first jig is formed with a convex portion having substantially the same shape as an end formed around the through hole of the joint fixing portion. The method of manufacturing a motor joint according to claim 5, wherein a crimped portion that is thermally caulked is formed inside the end by a convex portion of the first jig.