JP2003018794A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor capable of restraining the misalignment between the rotary shaft and worm shaft to the utmost in the motor of which the rotary shaft of an armature is coupled with the worm shaft through a coupling means as well as suppressing the occurrence of noises and vibrations from the coupling means caused by the misalignment. SOLUTION: A positioning means consisting of a positioning hole 9d and a positioning protrusion 21n is disposed in between a brush holder 9 which supports the rotary shaft 6 and a gear housing 21 which supports the worm shaft 23, and the direct positioning between the brush holder 9 and the gear housing 21 is carried out so as to reduce the totalling axial error between the rotary shaft 6 and worm shaft 23, thereby suppressing the misalignment therebetween as much as possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor in which a rotary shaft of an armature housed in a yoke housing and a worm shaft housed in a gear housing are connected by a connecting means. At times, it relates to a motor in which a rotating shaft and a worm shaft are connected by a connecting means.

[0002]

2. Description of the Related Art As a motor used in a power window device or the like, as shown in FIG.
Armature 54 having rotating shaft 52 and commutator 53 inside
A rotatably accommodating motor main body 50a, a gear housing 55 having a worm shaft 56, and a reduction portion 50b for transmitting a rotational driving force of the worm shaft 56 to a load side, and a rotary shaft 5
A clutch 57 that coaxially connects the 2 and the worm shaft 56.
Some have and.

As shown in FIG. 16, a clutch 57 includes a driving side rotating body 61 which is integrally rotatably connected to a tip end of a rotating shaft 52 and a driven side rotating body 62 which is integrally provided at a base end of a worm shaft 56. And the speed reducer 50b surrounding the outer circumference thereof.
Of the collar 63 fixed to the gear housing 55, and the rolling element 6 disposed between the driven-side rotating body 62 and the collar 63.
4 and. In the clutch 57, when the driving side rotating body 61 rotates, the rolling body 64 controls the control surface 62a provided on the driven side rotating body 62 and the inner peripheral surface 63a of the collar 63.
The rolling body 64 is rotated so as to maintain a position where it is not sandwiched between the driven side rotary body 61 and the driven side rotary body 62 in the rotational direction, and the driven side rotary body 62 is rotated.
The rotational drive force is transmitted to the load side (worm shaft 56
When the driven side rotating body 62 tries to rotate from the driven side rotating body 62, the rolling body 64 is sandwiched between the control surface 62a provided on the driven side rotating body 62 and the inner peripheral surface 63a of the collar 63. Is prevented from rotating.

Therefore, when the rotary shaft 52 is rotated by driving the motor main body 50a, the rotational driving force is generated by the clutch 57.
Is transmitted to the worm shaft 56 via the to move the window glass up and down. On the other hand, when the worm shaft 56 tries to rotate from the load side due to a downward load acting on the wind glass, such as the self-weight and vibration of the wind glass, the clutch 57 is actuated to prevent the worm shaft 56 from rotating, and the wind glass is unexpectedly rotated. It is designed not to descend.

[0005]

By the way, in the prior art,
A brush holder 59 for holding a brush 58 which is in sliding contact with the commutator 53 is interposed between the yoke housing 51 and the gear housing 55. This brush holder 5
9 is fitted in the opening of the yoke housing 51, and is provided with a bearing 60 that rotatably supports the tip end side of the rotary shaft 52 in the center. When the motor is assembled, the brush holder 5 is inserted into the opening of the yoke housing 51.
9 is fitted to the gear housing 55, and the rotary shaft 52 and the worm shaft 56 are connected by the clutch 57 portion.

However, since the brush holder 59 supporting the rotary shaft 52 is assembled with the yoke housing 51 and the gear housing 55 while being fitted in the yoke housing 51, the yoke housing 51 is attached to the gear housing 55. It will be indirectly positioned through. Therefore, the error between the rotary shaft 52 and the worm shaft 56 such as the dimensional error between the brush holder 59 and the yoke housing 51 and the dimensional error between the yoke housing 51 and the gear housing 55 increases.

Therefore, the clutch 57 connecting the rotary shaft 52 and the worm shaft 56 is misaligned (the central axis of the rotary shaft 52 and the central axis of the worm shaft 56 are inclined with respect to each other or are parallel to each other in the radial direction). It may be displaced)
Is likely to occur. When such an axis deviation occurs, a large load is applied in the radial direction to each other at, for example, the connecting portion between the clutch 57 (driving side rotating body 61) and the rotating shaft, and when rotating in this state, a large noise is generated at the connecting portion. Or vibration will occur. Therefore, it is desired to suppress the misalignment between the rotary shaft 52 and the worm shaft 56 as much as possible.

The present invention has been made to solve the above problems, and an object thereof is to provide a rotating shaft and a worm in a motor in which a rotating shaft of an armature and a worm shaft are connected through a connecting means. An object of the present invention is to provide a motor capable of suppressing axial deviation from the axis as much as possible and suppressing generation of abnormal noise and vibration from the connecting means due to the axial deviation.

[0009]

In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a motor main body for rotatably housing an armature having a rotary shaft and a commutator in a yoke housing, and the yoke. A brush holder that is disposed in an opening of the housing and has a bearing that holds a brush that slidably contacts the commutator and that rotatably supports the rotating shaft; and a gear housing that is assembled with the yoke housing with the brush holder interposed. A reduction unit having a worm shaft arranged substantially coaxially with the rotation shaft in the gear housing, and a coupling means for drivingly coupling the rotation shaft and the worm shaft when the both housings are assembled. And a positioning means provided between the brush holder and the gear housing.

According to a second aspect of the present invention, a motor main body that rotatably accommodates an armature having a rotary shaft and a commutator in a yoke housing is disposed in an opening of the yoke housing, and slidably contacts the commutator. The brush holder has a bearing that holds the brush and rotatably supports the rotating shaft, and a gear housing that is assembled with the yoke housing with the brush holder interposed therebetween. A reduction unit having a worm shaft arranged coaxially, a connecting means for drivingly connecting the rotary shaft and the worm shaft when the both housings are assembled, and provided between the brush holder and the gear housing. And a positioning means, and the rotating shaft and the worm shaft form a connecting means when the both housings are assembled. Together it is drivingly connected to, and the brush holder and the gear housing are positioned with respect to each other by the positioning means.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the motor described in (1), the brush holder has a sandwiching portion sandwiched between the openings of the both housings over substantially the entire circumference, and the sandwiching portion is provided with a seal member made of an elastic member. It is provided.

According to a fourth aspect of the present invention, in the motor according to any one of the first to third aspects, the brush holder is sandwiched between the openings of the both housings over substantially the entire circumference. The holding means is provided at a predetermined position inside the holding portion.

According to a fifth aspect of the present invention, in the motor according to any one of the first to fourth aspects, the positioning means includes a positioning protrusion provided on one of the brush holder and the gear housing. , And a positioning hole that is provided on the other of the two and that fits with the positioning protrusion.

According to a sixth aspect of the invention, in the motor according to the fifth aspect, the positioning protrusion and the positioning hole are two or more. According to a seventh aspect of the invention, in the motor according to the sixth aspect, at least two of the positioning protrusions and the positioning holes are arranged at substantially symmetrical positions about the rotation axis.

According to an eighth aspect of the present invention, in the motor according to any one of the first to seventh aspects, the connecting means includes a drive side rotating body that rotates integrally with the rotating shaft, the worm shaft, and the worm shaft. And a driven-side rotating body that rotates integrally with the driven-side rotating body. The rotating force from the rotating shaft is transmitted to the worm shaft via the driving-side rotating body and the driven-side rotating body, and the rotating force from the worm shaft is transferred to the worm shaft. It is configured so as not to be transmitted from the driven-side rotating body to the driving-side rotating body, or to transmit the rotational force from the worm shaft by applying a predetermined frictional force from the driven-side rotating body to the driving-side rotating body. It is the clutch.

According to a ninth aspect of the present invention, in the motor according to any one of the first to eighth aspects, the positioning means provided on the brush holder side is used when assembling parts to the brush holder. It is used for positioning with the transfer pallet placed on the.

(Operation) According to the invention described in claim 1,
Positioning means is provided between the brush holder supporting the rotating shaft and the gear housing supporting the worm shaft, and the brush holder and the gear housing are directly positioned.
Therefore, the integration of the error between the rotary shaft and the worm shaft becomes small, and the axial deviation between the rotary shaft and the worm shaft (the center axis of the rotary shaft and the center axis of the worm shaft are inclined to each other,
It is possible to suppress radial deviations in a parallel state). Therefore, for example, a large load is prevented from being applied to each other in the radial direction at a portion where the rotating shaft and the connecting means are connected, and large noise and vibration are suppressed from being generated at the connecting portion during rotation.

According to the second aspect of the present invention, the positioning means is provided between the brush holder supporting the rotary shaft and the gear housing supporting the worm shaft, and the positioning means is provided when the yoke housing and the gear housing are assembled. The shaft and the worm shaft are drivingly connected via a connecting means,
The brush holder and the gear housing are directly positioned by the positioning means. Therefore, the integration of the error between the rotary shaft and the worm shaft becomes small, and the axial deviation between the rotary shaft and the worm shaft (the center axis of the rotary shaft and the center axis of the worm shaft are inclined or parallel to each other). Radial deviation in the state) is suppressed as much as possible. Therefore, for example, a large load is prevented from being applied to each other in the radial direction at a portion where the rotating shaft and the connecting means are connected, and large noise and vibration are suppressed from being generated at the connecting portion during rotation.

According to the third aspect of the invention, a seal member made of an elastic member is provided in the sandwiching portion of the brush holder sandwiched between the openings of both housings. In other words, in such a brush holder, a positional deviation easily occurs between the brush holder and the gear housing due to the seal member. Therefore, a positioning means is provided between the brush holder and the gear housing.
It is particularly effective to suppress the axis shift between the rotating shaft and the worm shaft.

According to the invention described in claim 4, the positioning means is provided at a predetermined position inside the holding portion of the brush holder which is held between the openings of both housings. Therefore, the positioning means is not exposed outside the housings.

According to the fifth aspect of the present invention, the positioning of the brush holder and the gear housing is performed by fitting the positioning projections and the positioning holes provided to each other. Therefore, the positioning means can be easily configured.

According to the sixth aspect of the present invention, since there are two or more positioning protrusions and positioning holes, the brush holder and the gear housing can be reliably positioned. Therefore, the misalignment between the rotary shaft and the worm shaft can be suppressed as small as possible.

According to the invention described in claim 7, since at least two of the positioning protrusion and the positioning hole are arranged at substantially symmetrical positions about the rotation axis, the brush holder and the gear housing are reliably positioned. It Therefore, the misalignment between the rotary shaft and the worm shaft can be suppressed as small as possible.

According to the eighth aspect of the present invention, the rotational force from the rotary shaft is transmitted to the worm shaft via the drive-side rotary body and the driven-side rotary body, and the rotary force from the worm shaft is transmitted to the driven-side rotary body. Do not transmit from the body to the drive side rotating body,
Alternatively, in a motor including a clutch configured to apply a predetermined frictional force from the driven side rotating body to the driving side rotating body and transmit the rotating force from the worm shaft, an error between the rotating shaft and the worm shaft Is reduced, and the axis deviation between the rotary shaft and the worm shaft is suppressed as much as possible. Therefore, for example, a large load is prevented from being applied to each other in the radial direction at a portion where the rotating shaft and the clutch are connected to each other, and large noise and vibration are suppressed from being generated at the connecting portion during rotation.

According to the invention described in claim 9, the positioning means provided on the brush holder side is used for positioning with the transfer pallet placed when parts are assembled to the brush holder. Therefore, the positioning means can surely assemble the parts into the brush holder. Further, the positioning means is used both for positioning the brush holder with respect to the gear housing and for positioning the brush holder with respect to the transport pallet when assembling the parts. Therefore, it is not necessary to individually provide positioning means used for each positioning.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a cross-sectional view of a main part of a motor 1 of this embodiment used as a drive source for a power window device. The motor 1 includes a flat motor body 2, a speed reducer 3 and a clutch 20.

As shown in FIG. 1, the motor body 2 includes a yoke housing 4, a pair of magnets 5, a rotary shaft 6, an armature (armature) 7, a commutator 8, a brush holder 9 and a brush 10. .

The yoke housing 4 is formed into a substantially flat cylindrical shape with a bottom, and a pair of magnets 5 are fixed to the inner peripheral surface of the housing 4 so as to face each other. An armature 7 is housed inside the magnet 5. The armature 7 has a rotary shaft 6, and the base end of the rotary shaft 6 is rotatably supported by a bearing 11 provided at the center of the bottom of the yoke housing 4. On the other hand, a commutator 8 is fixed to a predetermined portion on the tip end side of the rotating shaft 6. Further, as shown in FIGS. 2 and 3, a connecting portion 6a having a two-sided cross section, which is chamfered in parallel from a cylindrical shape, is formed at the tip of the rotary shaft 6.

A brush holder 9 as shown in FIGS. 5 and 6 is fitted into the opening of the yoke housing 4. The brush holder 9 includes a holder main body 9a having a shape that substantially covers the opening of the yoke housing 4, and a connector portion 9b that is integrally provided from the holder main body 9a and projects outward in the radial direction of the yoke housing 4.

A bearing 12 is provided at the center of the holder body 9a, and the bearing 12 rotatably supports a portion of the rotary shaft 6 between the commutator 8 and the connecting portion 6a. Further, on the yoke housing 4 side of the holder main body 9a, a pair of brushes 10 which are connected to the connector portion 9b by wiring (not shown) and are in sliding contact with the commutator 8 are provided in the brush holding portion 9e.
Respectively held by. The brush 10 supplies the external power supplied through the connector portion 9b to the coil winding wound around the armature 7 through the commutator 8 to rotate the armature 7 (rotating shaft 6), that is, the motor body 2 Drive to rotate.

Further, a holding portion 9c which is held between the yoke housing 4 and an opening portion of a gear housing 21 described later is provided on the outer peripheral portion of the holder main body 9a over the entire circumference. The sandwiching portion 9c is a seal member 1 made of an elastic member.
It is covered with 3. The seal member 13 extends to the connector portion 9b side. The seal member 13 seals both openings of the yoke housing 4 and the gear housing 21 to form a waterproof structure.

Further, inside the holding portion 9c of the holder main body 9a, a circular cross-section is positioned near a pair of corners located symmetrically with respect to the rotating shaft 6 (positions equidistant from the center of the rotating shaft 6). The hole 9d is formed. The pair of positioning holes 9d are holes penetrating in the axial direction of the rotary shaft 6 and are elongated in the same direction. In the vicinity of the corner where the positioning hole 9d is provided, other parts (for example, the brush 1)
It is a place where it is difficult to interfere with 0 or parts accompanying it).

Here, the brush holder 9 of this embodiment is
At the time of assembly, it is placed on the transfer pallet 101 as shown in FIGS. 11 to 14 (in this case, the brush holder 9 is placed in a state where a predetermined portion is covered with the seal member 13), The board is moved along the transfer rail 102, and the board on which the hall element is mounted, the capacitor, the thermistor, etc. (all not shown) and various electric parts mounted on the motor are sequentially assembled.

Specifically, the transfer pallet 101 is provided so as to be movable along the transfer rail 102.
The transfer pallet 101 is located in the vicinity of the mounting table 103 in the shape of a quadratic prism for mounting the holder main body 9a of the brush holder 9, and the mounting table 103.
It has a columnar auxiliary stand 104 for mounting the base end of b.

On the mounting table 103, a pair of positioning pins 1 fitted into the positioning holes 9d formed in the holder body 9a.
05 is erected. The positioning pin 105 plays a role of positioning the brush holder 9 with respect to the mounting table 103 (conveyance pallet 101) by being fitted into the positioning hole 9d. Also, the positioning pin 105
Prevents the brush holder 9 from collapsing when the brush holder 9 is mounted on the mounting table 103 and the auxiliary table 104. That is, the positioning pin 105 and the positioning hole 9d are set to have such lengths that the brush holder 9 does not fall when the brush holder 9 is mounted on the mounting table 103 and the auxiliary table 104.

Further, the transfer pallet 101 of this embodiment is provided with a manual knob 106 for moving the pallet 101 by manual operation. Transport pallet 1
01 is sequentially moved to a predetermined place by operating the manual knob 106, and the above various electric parts are sequentially assembled to the brush holder 9 on the pallet 101 by hand. Alternatively, the transfer pallet 101 may be automatically moved by the transfer device, and various electric parts may be automatically assembled by the work robot. In this case, the above-mentioned positioning hole 9d serves as an assembling reference when assembling the above-mentioned various electric parts to the brush holder 9.

As shown in FIG. 1, the opening of the yoke housing 4 is formed with a flange portion 4a extending outward in the longitudinal direction of the cross section of the housing 4 in the direction orthogonal to the axis. Each flange 4a has a screw 1 at a predetermined position.
A screw insertion hole (not shown) for inserting 4 is provided.

The reduction gear unit 3 includes a gear housing 21 and a bearing 2.
2a, 22b, worm shaft 23, worm wheel 24
And an output shaft 25. The gear housing 21 is
The end portion (upper side in FIG. 1) made of resin and fixed to the motor body 2 (hereinafter referred to as the upper end portion) has a flat type (substantially rectangular shape) corresponding to the opening of the yoke housing 4. Has been formed. At the upper end of the gear housing 21,
As shown in FIGS. 3 and 4, a fitting recess 21a into which the holding portion 9c of the holder body 9a of the brush holder 9 is fitted is formed. Further, screw holes 21b and 21c into which the screws 14 are screwed are formed at positions corresponding to the screw insertion holes of the yoke housing 4 at the upper end of the gear housing 21, respectively. Then, with the brush holder 9 attached to the opening of the yoke housing 4, the holding portion 9c of the holder main body 9a is fitted into the fitting recess 21a of the gear housing 21 so that the screw holes 21b and 21c of the gear housing 21 are fitted.
The yoke housing 4 and the gear housing 21 are connected to each other by screwing the screw 14 into the.

The gear housing 21 has a fitting recess 21a.
A recess 21d is provided which is recessed from the center of the bottom portion of the fitting recess 21a and is long in the longitudinal direction of the fitting recess 21a. Further, the gear housing 21 is provided with a clutch accommodating recess 21e, which is a circular recess recessed from the center of the bottom of the recess 21d, and is recessed so as to extend from the center of the bottom of the clutch accommodating recess 21e along the axial direction of the rotary shaft 6. Worm shaft accommodating portion 21f
(See FIG. 2) are formed. Also, the gear housing 2
1 is formed with a wheel accommodating portion 21g that communicates with the worm shaft accommodating portion 21f in a direction orthogonal to the axis of the intermediate portion of the worm shaft accommodating portion 21f (rightward in FIG. 1).

Further, as shown in FIG. 3, an annular flange fitting recess 21h is formed in the opening of the clutch accommodating recess 21e. Engagement recesses 21i extending in the longitudinal direction of the flange fitting recess 21h are continuously formed at both longitudinal ends of the recess 21d.

Two pedestals 2 are provided on the bottom of the recess 21d.
1j is formed. Each pedestal 21j is formed around the engaging recess 21i. That is, pedestal 2
1j is formed in a substantially U shape so as to have a wall surface that is continuous with the wall surface of the engaging recess 21i. Cylindrical engagement protrusions 21k are formed at both ends in the lateral direction of the recess 21d on the upper surface of each pedestal 21j.

Further, at the bottom of the clutch accommodating recess 21e,
As shown in FIG. 2, the bearing holding portion 21l is formed so as to be able to bend in the direction orthogonal to the axis. This bearing holder 21l
Is formed in a substantially cylindrical shape having an inner diameter larger than that of the worm shaft housing portion 21f and an outer diameter smaller than that of the clutch housing recess 21e. The bearing holder 21l is formed so as to extend in the axial direction up to approximately the center of the clutch housing recess 21e. Also, on the base end side of the outer peripheral surface of the bearing holder 21l,
As shown in FIGS. 2 and 4, eight ribs 21m connected to the inner peripheral surface of the clutch housing recess 21e are formed at equal angular intervals (45 °).

The bearings 22a and 22b are sliding bearings (metal bearings) made of metal and having a substantially cylindrical shape, and the bearing 22a is fitted in the bearing holding portion 21l. The inner diameter of the bearing 22a is set smaller than the inner diameter of the worm shaft housing portion 21f. In addition, the bearing 22b is the worm shaft accommodating portion 21.
It is internally fitted to the bottom side (lower side in FIG. 1) of f.

A pair of cylindrical positioning protrusions 21n are formed on the bottom of the recess 21d at positions corresponding to the pair of positioning holes 9d formed in the brush holder 9. The positioning protrusion 21n extends in the axial direction and is fitted into the positioning hole 9d. The brush holder 9 and the gear housing 21 are positioned by fitting the positioning protrusion 21n and the positioning hole 9d. That is, in this embodiment, the positioning protrusion 2
1n and the positioning hole 9d constitute the positioning means. As described above, the holding portion 9c of the brush holder 9
Fits into the fitting recess 21a of the gear housing 21,
Since the holding portion 9c is covered with the seal member 13 made of an elastic member, accurate positioning cannot be performed. Therefore, in the present embodiment, as described above, the gear housing 2
With the positioning protrusion 21n of No. 1 and the positioning hole 9d of the brush holder 9, the brush holder 9 and the gear housing 21
And are directly positioned. Therefore, in the present embodiment, the error accumulated between the rotary shaft 6 and the worm shaft 23 is smaller than in the conventional case, and the rotary shaft 6 and the worm shaft 23 are integrated.
Between the center axis of the rotary shaft 6 and the worm shaft 23
The central axis of the is inclined to each other, or is displaced in the radial direction while being parallel to each other) is suppressed as much as possible.

The worm shaft 23 is made of a metallic material, and comprises a worm shaft portion 28 and a driven side rotating body 29 integrally formed at the end portion of the worm shaft portion 28 on the motor body 2 side (see FIG. 3). The worm shaft portion 28 has a worm 28a formed at an intermediate portion thereof, and is rotatably supported by bearings 22a and 22b at both ends thereof and accommodated in the worm shaft accommodation portion 21f.

The worm wheel 24 has a worm 28a.
The wheel accommodating portion 21 is meshed with the worm shaft 23 and is rotatable about an axis in a direction orthogonal to the worm shaft 23 (a direction orthogonal to the plane of FIG. 1).
It is housed within g. The output shaft 25 is connected to the worm wheel 24 so as to rotate coaxially with the rotation of the worm wheel 24. This output shaft 2
5 is drivingly connected to a known window regulator (not shown) for moving up and down the window glass.

The rotary shaft 6 is connected to the worm shaft portion 28 via a clutch 20. As shown in FIGS. 2 and 3, the clutch 20 includes the driven-side rotating body 29, the collar 31, a plurality of (three) rolling elements 32, and the support member 3.
3, a stopper 34, a drive side rotating body 35, and a ball 36.

The collar 31 has a cylindrical outer ring 31a, an annular flange portion 31b extending radially outward from one end (upper end in FIGS. 2 and 3) of the outer ring 31a, and the flange portion 31.
It is composed of a pair of engaging portions 31c which are spaced 180 degrees from b and further extend radially outward. The outer ring 31a of the collar 31 is fitted in the clutch housing recess 21e, and the flange 31b is fitted in the flange fitting recess 21h.
The engaging portion 31c is fitted into the engaging recess 21i to prevent the collar 31 from rotating. The outer ring 31a of the collar 31 is internally fitted to the other end (lower end in FIG. 2) up to the position of the tip (upper end in FIG. 2) of the bearing holder 21l and does not hinder the bending of the bearing holder 21l. .
The driven side rotating body 29 is arranged inside the outer ring 31a.

As shown in FIG. 3, the driven rotating body 29 includes a shaft portion 29a coaxially extending from the base end portion of the worm shaft portion 28 to the motor body 2 side (rotating shaft 6 side), and the shaft portion thereof. Two
It is provided with three engagement protrusions 29b extending outward in the radial direction at regular intervals (120 °) from 9a. Engaging protrusion 29b
Are formed so that the width in the circumferential direction becomes wider toward the radially outer side. Further, as shown in FIG. 8 which is a sectional view taken along the line AA of FIG. 2, the distance between the radially outer surface of the engaging convex portion 29b and the inner peripheral surface 31d of the outer ring 31a of the collar 31 changes in the rotational direction. A control surface 41 is formed. The control surface 41 of the present embodiment is formed in a planar shape such that the distance from the inner peripheral surface 31d of the collar 31 becomes shorter toward the rotation direction end side of the driven side rotating body 29. As shown in FIG. 3, the driven-side rotating body 29 is provided with a reinforcing rib 29c of the engaging convex portion 29b. The reinforcing rib 29c is formed so as to connect the circumferential end faces of the engaging protrusions 29b that are circumferentially adjacent to each other at the end of the engaging protrusion 29b on the worm shaft 28 side.

Each rolling element 32 is formed of a resin material in a substantially cylindrical shape, and is arranged between the control surface 41 of the engaging convex portion 29b and the inner peripheral surface 31d of the collar 31, as shown in FIG. ing. The diameter of the rolling element 32 is smaller than the length of the interval between the central portion (rotation direction central portion) 41a of the control surface 41 and the inner peripheral surface 31d of the collar 31, and the side portion (rotation direction end portion) of the control surface 41.
It is set to be larger than the distance between the inner peripheral surface 31d of the collar 31 and 41b and 41c. That is, the diameter of the rolling element 32 is set to be equal to the length of the interval between the intermediate portion 41d between the central portion 41a and the side portions 41b and 41c and the inner peripheral surface 31d of the collar 31.

The support member 33 holds the rolling elements 32 rotatably and substantially parallel to each other at equal angular intervals. More specifically, the support member 33 is made of a resin material, and as shown in FIGS. 2 and 3, the ring portion 33a and the three inner extending portions 3 are formed.
3b, three pairs of roller supports 33c, and three connecting portions 33d. The ring portion 33a is formed in an annular shape having a diameter larger than that of the outer ring 31a. Three extension parts 33
The b's extend from the inner circumference of the ring portion 33a radially inward at equal angular intervals. Each of the roller supports 33c extends in the axial direction from both ends in the circumferential direction on the radially inner side of the inner extending portion 33b. Each connecting portion 33d is formed in an arc shape so as to connect adjacent roller supports 33c.
A pair of locking projections 33e facing each other in the circumferential direction is formed at the tip of each roller support 33c. Then, each rolling element 32 is held between each pair of roller supports 33c and between the inner extending portion 33b and the locking convex portion 33e, and is immovable in the circumferential direction and the axial direction with respect to the ring portion 33a. Retained. As described above, in the support member 33 holding the rolling elements 32, each roller support 33c has the outer ring 31a so that the rolling elements 32 are arranged between the control surface 41 and the inner peripheral surface 31d of the collar 31, as described above. Inserted inside the
The ring portion 33a is arranged so as to abut on the flange portion 31b on the outer side in the axial direction of the collar 31.

The stopper 34 is made of a metal plate having a uniform thickness. The stopper 34 has an abutting portion 34a formed in an annular shape having a diameter substantially the same as the ring portion 33a of the support member 33, The contact portion 34a is provided with an extending portion 34b extending outward in the radial direction at 180 ° intervals. As shown in FIG. 2, the inner and outer diameters of the contact portion 34a are the same as those of the collar 3
The diameter is set to be substantially the same as the inner and outer diameters of the first outer ring 31a. A fixed portion 34c is formed on the extended portion 34b. The fixed portions 34c are formed at the four corners of the stopper 34 so as to correspond to the engaging protrusions 21k of the gear housing 21. The stopper 34 is fixed to the gear housing 21 by fitting the engagement protrusion 21k into the fixing portion 34c. The contact portion 34a of the stopper 34 is arranged on the upper portion (the upper portion in FIG. 1) of the ring portion 33a of the support member 33. The stopper 34 restricts the movement of the rolling element 32 in the axial direction together with the support member 33 when the ring portion 33a of the support member 33 contacts the contact portion 34a. Further, as shown in FIGS. 2 and 3, a restricting portion 34d is formed substantially at the center of each extending portion 34b. The regulation portion 34d is formed by cutting and raising a part of the extension portion 34b. The tip of the regulating portion 34d abuts on the engaging portion 31c of the collar 31 and
It regulates the movement in the axial direction.

The drive side rotating body 35 has a shaft portion 35a,
A disk part 35b having a diameter larger than that of the shaft part 35a, and a disk part 3
5b has a ball holding portion 35c provided at the center thereof. A ball accommodating recess 35d for holding the ball 36 is formed in the ball holding portion 35c. The balls 36 held in the ball accommodating recesses 35d are held in a state in which a part of the balls 36 protrudes in both axial directions, and abut against the end surface of the rotary shaft 6 and the end surface of the worm shaft 23, respectively. There is.

At the center of the axis of the drive-side rotary member 35, a cross-sectional width across flats extending from the base end (upper end in FIG. 2) of the shaft portion 35a toward the lower ball holding portion 35c and having a pair of parallel surfaces. A shaped connecting hole 35e is formed so as to communicate with the ball accommodating recess 35d. In this connection hole 35e,
The connecting portion 6a of the rotary shaft 6 is loosely fitted. That is,
The connecting hole 35e is set to have a dimension relatively larger than the connecting portion 6a of the rotary shaft 6 by a predetermined value, and a gap S is formed between them. Then, the connecting portion 6a of the rotating shaft 6 is loosely fitted in the connecting hole 35e,
The drive-side rotary body 35 and the rotary shaft 6 are drive-connected so as to be integrally rotatable. In this case, since the connecting portion 6a of the rotating shaft 6 is loosely fitted in the connecting hole 35e, even if an axial deviation occurs with the rotating shaft 6, the axial deviation is allowed.

Here, the driving side rotary member 35 of the present embodiment.
Has a metal plate 37 inserted into a resin forming a substantially outer shape, and further has an elastic holding portion 38 and a buffer portion 4 which will be described later.
An elastomer resin having an elastic force is integrally molded to form 3.

The metal plate 37 has a connecting hole 37 having the same cross section as that of the connecting hole 35e exposed in the connecting hole 35e.
It has a and extends to each protruding portion 42 described later. The inner peripheral surface of the connecting hole 37a has the connecting hole 35e.
It is designed to be flush with the inner surface of the. The metal plate 37 engages with the driving-side rotating body 35, particularly the driven-side rotating body 29 to transmit the driving force to the rigidity of each projecting portion 42 and the connecting portion 6a of the rotary shaft 6 to engage the driving force. Connection hole 35 for transmission
It is inserted to improve the rigidity of the e portion.

Then, the connecting hole 3 of the metal plate 37
In the connecting hole 35e where 7a is exposed, it engages with the connecting portion 6a of the rotating shaft 6 in the rotation direction. In this case, although the connecting hole 35e is short in the axial direction, the metal plate 3
Since the rigidity is improved by 7, the rotation driving force from the rotary shaft 6 is surely received while suppressing an increase in size in the axial direction. Further, since the connecting hole 35e is shortened in the axial direction, the rotary shaft 6 with respect to the drive side rotary body 35 is
The inclination angle of can be wide. Therefore, even when the inclination of the rotary shaft 6 is large, it can be easily dealt with.

Further, the drive side rotary member 35 has a connecting hole 35e.
An elastic holding portion 38 made of an elastomer resin having an elastic force is integrally formed so as to be continuous from the opening of the.
The inner diameter of the shaft portion 35a integrally formed with the elastic holding portion 38 is set to be larger than the inner diameter of the connecting hole 35e. Although not shown, the elastic holding portion 38 has the connecting hole 3
The inner diameter of each flat surface 5e is set to be slightly smaller. Therefore, the elastic holding portion 38 is adapted to come into pressure contact with the respective flat surface portions of the connecting portion 6a of the rotary shaft 6.
Therefore, when the drive-side rotary body 35 is mounted on the rotary shaft 6 when the motor 1 is assembled, the elastic holding portion 38 elastically holds the drive-side rotary body 35 so that the drive-side rotary body 35 does not fall off the rotary shaft 6.
The workability of assembling the motor 1 is improved. As described above, even if the drive side rotating body 35 and the rotary shaft 6 are misaligned, the elastic holding portion 38 is only elastically deformed and does not have a bad influence.

As shown in FIG. 3, on the tip side (lower side in FIG. 2) of the disk portion 35b of the drive side rotating body 35, a substantially fan shape is formed which extends radially outward and projects from the tip in the axial direction. A plurality of (three) protruding portions 42 are formed at equal angular intervals.
As shown in FIG. 8, each of the projecting portions 42 has a large arc surface formed along the inner peripheral surface 31d with a diameter slightly smaller than the inner peripheral surface 31d of the collar 31. That is, the driving side rotating body 3
5, the protruding portion 42 is formed so that it can be inserted in the axial direction from the center hole of the contact portion 34a of the stopper 34. The protruding portion 42 is formed with a fitting groove 42a (see FIG. 8) that extends in the radial direction from the radially inner side to the middle of the protruding portion 42. The protruding portions 42 are provided between the engaging convex portions 29b of the driven-side rotating body 29 in the outer ring 31a, and the rolling elements 32.
It is arranged between (each roller support 33c).

A buffer portion 43 made of an elastomer resin having an elastic force is integrally formed in the fitting groove 42a.
The buffer portion 43 is provided continuously with the elastic holding portion 38 through a through hole 35f (see FIG. 2) provided at a predetermined position of the resin portion of the drive side rotating body 35. Buffer unit 43
A buffer portion 43a is formed on the outer peripheral surface of the fitting groove 42a so as to protrude radially inward of the protruding portion 42 and spread in the circumferential direction.
As shown in FIG. 8, the circumferential width of the buffer portion 43a is set to be slightly larger than the circumferential width of the inner circumferential surface of the protruding portion 42.

When one side surface (counterclockwise side surface) 43b of the buffer portion 43a rotates to a predetermined position in the counterclockwise direction (arrow X direction) with respect to the driven side rotating body 29, It contacts the first cushioning surface 29e formed on the radially inner side of the clockwise surface of the engaging convex portion 29b. Further, one side surface (a surface on the counterclockwise side) 42b formed on the radially inner side of the protruding portion 42 is formed when the drive-side rotating body 35 further rotates in the counterclockwise direction (arrow X direction) from the predetermined position. , The first contact surface 29f formed radially outside the clockwise surface of the engaging projection 29b. In addition, the driving side rotary member 35
When the cushioning portion 43a is bent (crushed) in the circumferential direction, the cushioning portion 43a further rotates in the counterclockwise direction (arrow X direction) from the predetermined position (see FIG. 9).

Further, on the other side surface (counterclockwise side surface) 43c of the buffer portion 43a, the driving-side rotating body 35 is attached to the driven-side rotating body 2.
When it is rotated to a predetermined position in the clockwise direction (direction of arrow Y) with respect to 9, it comes into contact with the second cushioning surface 29g formed on the inside in the radial direction of the counterclockwise side surface of the engaging convex portion 29b. or,
The other side surface (clockwise surface) 42c formed on the radially inner side of the projecting portion 42 engages with the protrusion when the drive-side rotating body 35 rotates further in the clockwise direction (arrow Y direction) from the predetermined position. The second contact surface 29h is formed on the outer side in the radial direction of the counterclockwise surface of the portion 29b. In addition, the driving side rotary member 35
The buffer portion 43a is bent (crushed) in the circumferential direction, so that the buffer portion 43a is further clockwise from the predetermined position (arrow Y direction).
Rotate to.

Each member 32, 42, 29b, 33c
As shown in FIG. 9, one side surface 42 b of the protruding portion 42 abuts on the first contact surface 29 f of the engaging convex portion 29 b, and the protruding portion 42 b
The state in which the first pressing surface 42d formed on the outer side in the radial direction of the surface on the counterclockwise side of is in contact with the roller support 33c (see FIG. 9).
And the other side surface 42c of the projecting portion 42 is the engaging projection 2
9b of the second contact surface 29h, the second pressing surface 42e formed on the radially outer side of the projecting portion 42 on the clockwise side is in contact with the roller support 33c. Each member 32, 42, 29b, 3 is arranged so that 32 is arranged at a position corresponding to the central portion 41a of the control surface 41.
The shape and size of 3c are set.

Further, the shaft portion 35a of the driving side rotating body 35 has
A sensor magnet 45, which has a ring shape and is multipolarly magnetized in the rotation direction, is attached so as to rotate integrally. On the other hand, the brush holder 9 is provided with a magnetic detection element (not shown) such as a Hall element or a magnetoresistive element at a portion located near the sensor magnet 45. The magnetic detection element is provided to detect a change in the magnetic field due to the rotation of the sensor magnet 45 and to detect the number of rotations of the rotary shaft 6 that rotates integrally with the drive-side rotating body 35.

Motor 1 of such a power window device
When the motor main body 2 is driven and the rotating shaft 6 rotates in the counterclockwise direction (arrow X direction) in FIG. 8, for example, the drive side rotating body 35 (protruding portion 42) moves in the same direction (arrow X) together with the rotating shaft 6. Direction). Then, as shown in FIG.
When one side surface 42b of the protruding portion 42 abuts on the first abutting surface 29f of the engaging convex portion 29b and the first pressing surface 42d abuts on the roller support 33c, the rolling element 32 causes the central portion 41a of the control surface 41 to move. Is arranged at a position corresponding to (hereinafter, referred to as a neutral position). In this case, the one side surface 43b of the buffer portion 43a first contacts the first buffer surface 29e of the engaging protrusion 29b before the one side surface 42b of the protruding portion 42 contacts the first contact surface 29f. Therefore, the impact at the time of contact is small.

In this neutral state, the rolling element 32 is not sandwiched between the control surface 41 of the engaging convex portion 29b and the inner peripheral surface 31d of the collar 31, so that the driven side rotational element 29 can rotate with respect to the collar 31. . Therefore, when the driving-side rotating body 35 further rotates counterclockwise, the rotational force is transmitted from the protruding portion 42 to the driven-side rotating body 29, and the driven-side rotating body 29 rotates together. At this time, the rotational force in the same direction (the arrow X direction) is transmitted from the first pressing surface 42d to the roller support 33c (support member 33), and the roller support 33c
The (support member 33) moves in the same direction as the rolling element 32.

On the contrary, when the rotary shaft 6 rotates in the clockwise direction (arrow Y direction) in FIG. 8, the rolling element 32 is arranged at the neutral position by the protruding portion 42 as described above. In this state, the rolling element 32 is not sandwiched between the control surface 41 of the engaging convex portion 29b and the inner peripheral surface 31d of the collar 31, so that the driven side rotational element 29 can rotate with respect to the collar 31. Therefore,
The rotational force of the drive-side rotating body 35 is transmitted from the protruding portion 42 to the driven-side rotating body 29, and the driven-side rotating body 29 rotates together.

Then, the worm shaft 23 rotates together with the driven rotary member 29, and the worm wheel 24 and the output shaft 25 rotate in accordance with the rotation. Therefore, the window regulator drivingly connected to the output shaft 25 operates, and the window glass is opened / closed (elevated).

On the other hand, when a load is applied to the output shaft 25 from the load side (window glass side) while the motor 1 is stopped, the driven side rotating body 29 tries to rotate due to the load. Then, when the driven side rotating body 29 is rotated in the clockwise direction (arrow Y direction) in FIG. 8, the rolling body 32 relatively moves to the side portion 41b side of the control surface 41 of the engaging convex portion 29b. Then, as shown in FIG. 10, when the driven side rotating body 29 rotates in the same direction until the rolling body 32 becomes the intermediate portion 41d on the side portion 41b side, the rolling body 32 is rotated by the inner circumference of the control surface 41 and the collar 31. It is clamped by the surface 31d (becomes a locked state). Since the outer ring 31a is fixed, the driven rotor 2
Further rotation of 9 in the same direction is blocked, and the drive side rotating body 35 is not rotated together.

On the contrary, when the driven rotor 29 is rotated in the counterclockwise direction (arrow X direction) in FIG. 8 by the above load,
The rolling element 32 is a side portion 41c of the control surface 41 of the engaging convex portion 29b.
Move relative to the side. Eventually, when the driven side rotating body 29 rotates in the same direction until the rolling body 32 becomes the intermediate portion 41d on the side portion 41c side, the rolling body 32 is sandwiched between the control surface 41 and the inner peripheral surface 31d of the collar 31 ( It will be locked). Since the outer ring 31a is fixed, the driven rotor 2
Further rotation of 9 in the same direction is blocked, and the drive side rotating body 35 is not rotated together.

Thus, the load side (wind glass side)
Therefore, even if a large load is applied to the output shaft 25 side, the rotation of the driven side rotating body 29 is blocked. Therefore, it is possible to prevent the windshield connected to the output shaft 25 from unintentionally moving due to its own weight, vibration, external force, or the like.

Motor 1 of such a power window device
At the same time, the yoke 20 is assembled with the armature 7 and the brush holder 9 and the gear housing 21 with the worm shaft 23, and the clutch 20 is assembled. Specifically, as shown in FIG. 7, the drive-side rotating body 35 is mounted on the rotary shaft 6 in advance, and the components of the clutch 20 other than the drive-side rotating body 35 are the gear housing 2
1 is pre-assembled. Then, at the same time when the yoke housing 4 and the gear housing 21 are assembled, the driving side rotating body 35 is arranged at a predetermined position with respect to the driven side rotating body 29, the support member 33, etc., and the clutch 20 is completed.

Further, in this case, the brush holder 9 and the gear housing 21 are directly positioned by fitting the positioning hole 9d provided in the brush holder 9 and the positioning protrusion 21n provided in the gear housing 21. . Therefore, in the present embodiment, the error accumulated between the rotary shaft 6 and the worm shaft 23 is smaller than in the conventional case, and the axial deviation between the rotary shaft 6 and the worm shaft 23 (the center axis of the rotary shaft 6 and The central axis of the worm shaft 23 may be inclined with respect to each other, or may be displaced in the radial direction while being parallel to each other). Therefore, for example, a large load is prevented from being applied to each other in the radial direction at the connecting portion between the rotating shaft 6 and the clutch 20 (driving side rotating body 35), and the generation of a large noise or vibration from the connecting portion during rotation is suppressed. To be done.

Further, even if an axis shift occurs between the rotary shaft 6 and the worm shaft 23, the connecting hole 35 of the drive side rotary body 35 is formed.
Since the respective dimensions are set so that the e and the connecting portion 6a of the rotary shaft 6 are loosely fitted to each other, the axis deviation is allowed, and the connecting portion between the drive side rotating body 35 and the rotary shaft 6 has a large radial direction. Is prevented from occurring. Therefore, even in such a case, generation of a large noise or vibration from the connecting portion between the drive-side rotating body 35 and the rotary shaft 6 during rotation is suppressed.

In this case, the connecting hole 35e of the drive side rotating body 35 and the connecting portion 6a of the rotary shaft 6 are loosely fitted, but the elastic holding portion 38 provided in the connecting hole 35e.
As a result, the driving-side rotating body 35 is elastically held against the rotating shaft 6 so as not to fall off. Therefore, as shown in FIG. 7, during assembly, for example, when the drive-side rotary body 35 is mounted below the rotary shaft 6, or when the drive-side rotary body 35 is separated from the rotary shaft 6, centrifugal force is applied. When working, the drive-side rotating body 35 is held so as not to fall off the rotary shaft 6, so that the assembly work of the motor 1 does not become complicated.

As described above, this embodiment has the following effects. (1) Between the brush holder 9 that supports the rotary shaft 6 and the gear housing 21 that supports the worm shaft 23, positioning means including a positioning hole 9d and a positioning protrusion 21n is provided, and the brush holder 9 and the gear housing are provided. 21 and 21 are directly positioned. Therefore, the integration of the error between the rotary shaft 6 and the worm shaft 23 becomes small, and the misalignment between the rotary shaft 6 and the worm shaft 23 (the central axis of the rotary shaft 6 and the central axis of the worm shaft 23 are mutually It is possible to suppress as much as possible such as tilting or radial deviation in a state of being parallel to each other. Therefore, for example, the rotating shaft 6 and the clutch 20
It is possible to prevent a large load from being applied to each other in the radial direction at the portion where the (driving side rotating body 35) is connected,
It is possible to suppress the generation of large noise and vibration from the connecting portion during rotation.

(2) Positioning hole 9d and positioning protrusion 21
The positioning means composed of n and n is provided inside the holding portion 9c of the brush holder 9 held between the openings of the yoke housing 4 and the gear housing 21. Therefore, the positioning means is not exposed outside the housings 4 and 21, and it is not necessary to provide a special waterproof structure for the positioning means.

(3) Brush holder 9 and gear housing 2
Positioning with 1 is performed by fitting the positioning hole 9d and the positioning protrusion 21n provided to each other. Therefore, the positioning means can be easily configured.

(4) Since two positioning protrusions 21n and two positioning holes 9d are provided, the brush holder 9 and the gear housing 21 can be reliably positioned. Therefore, the axis deviation between the rotary shaft 6 and the worm shaft 23 can be suppressed as small as possible.

(5) Since the positioning protrusions 21n and the positioning holes 9d are arranged at the substantially corners of the symmetrical position about the rotary shaft 6, the brush holder 9 and the gear housing 2 are arranged.
1 can be reliably positioned. Therefore, the axis deviation between the rotary shaft 6 and the worm shaft 23 can be suppressed as small as possible.

(6) When the holder 9 is placed on the carrier pallet 101 to assemble various electric parts to be mounted on the motor, such as a substrate on which the Hall element is mounted on the brush holder 9, a capacitor, a thermistor, etc. The positioning pin 105 provided on the mounting table 103 of the transport pallet 101 is fitted into the positioning hole 9d of the carrier 9a to position the holder 9. Here, for example, when positioning the brush holder 9 by sandwiching the seal member 13 mainly covering the outer peripheral side of the brush holder 9, since the seal member 13 is made of an elastic member, the brush holder 9 is moved and positioned. Can not do it. It is also conceivable to firmly hold the seal member 13 so that the brush holder 9 does not move.
When firmly sandwiched in this way, the seal member 13 may be deformed and the sealing performance may be deteriorated. Therefore, since the positioning hole 9d provided in the holder body 9a and the positioning pin 105 are fitted to position the brush holder 9, the above-mentioned problem does not occur.

(7) The positioning pin 10 is placed in the positioning hole 9d.
When the brush holder 9 is inserted into the brush holder 9, the brush holder 9 is attached.
3 and the holder 9 are configured so that the holder 9 does not fall when placed on the auxiliary table 104. That is, the brush holder 9
The holder body 9a and the base end of the connector portion 9b are supported by the mounting table 103 and the auxiliary table 104 without tilting. Therefore, even if the shape of the tip side of the connector portion 9b changes, it is not necessary to replace the mounting table 103 and the auxiliary table 104.

(8) The positioning hole 9d is provided in the brush holder 9
Is used for both positioning the gear with respect to the gear housing 21 and positioning with respect to the mounting table 103 when assembling various electric components. Therefore, it is not necessary to individually provide holes used for each positioning.

(9) The connecting portion 6a of the rotating shaft 6 is connected to the connecting hole 35e formed in the drive side rotating body 35 so as to be integrally rotatable and loosely fitted. Therefore, if the rotary shaft 6
Even if there is an axial deviation between the worm shaft 23 and the worm shaft 23, the axial deviation is allowed, and it is possible to prevent a large radial load from being generated in the connecting portion between the driving side rotary body 35 and the rotary shaft 6. . Therefore, even in such a case, it is possible to suppress the generation of a large noise or vibration from the connecting portion between the drive-side rotating body 35 and the rotary shaft 6 during rotation.

The embodiment of the present invention may be modified as follows. In the above-described embodiment, the positioning means for positioning the brush holder 9 and the gear housing 21 has a positioning hole 9d as described above.
However, the number, shape, position, etc. may be appropriately changed.

For example, in the above embodiment, the brush holder 9 is provided with the positioning hole 9d and the gear housing 21 is provided with the positioning protrusion 21n.
A positioning hole may be provided in the gear housing 21.

Further, although the number of the positioning holes 9d and the positioning protrusions 21n in the above embodiment is two, the number may be one or three or more. Although the positioning hole 9d has a circular cross section and the positioning protrusion 21n has a cylindrical shape in the above embodiment, for example, the positioning hole 9d has a polygonal cross section and the positioning protrusion 21 has a circular cross section.
n may be a polygonal column.

Further, the positioning projections 21n and the positioning holes 9d in the above-described embodiment are arranged at the substantially corners of symmetrical positions about the rotation shaft 6, respectively.
Alternatively, they may be arranged symmetrically with respect to the rotation axis 6 in the direction along the longitudinal direction of the first opening.

The configuration of the clutch 20 of the above embodiment may be changed as appropriate. For example, in the above-described embodiment, the control surface 41 of the driven side rotating body 29 and the inner peripheral surface 31d of the collar 31 are prevented from transmitting the rotational force from the worm shaft 23 to the driving side rotating body 35 from the driven side rotating body 29. Although the clutch 20 that holds the rolling element 32 between them and locks the driven side rotating body 29 in a non-rotatable manner is used, for example, by adjusting the control surface 41, the control surface 41 of the driven side rotating body 29 and the collar 31 can be adjusted. Inner surface 31
Using a clutch that allows the driven-side rotating body 29 to rotate while applying a predetermined frictional force between the rolling body 32 and the inner peripheral surface 31d of the collar 31 while sandwiching the rolling body 32 with d. Good.

In the above embodiment, the driven-side rotating body 29 is formed integrally with the worm shaft 23.
May be separated from the worm shaft 23 and assembled together. In this case, the driven side rotating body 29 and the worm shaft 23 may be connected so as to be loosely fitted.

In the above embodiment, the connecting portion 6 of the rotary shaft 6 is
Although the a and the connecting hole 35e of the driving-side rotating body 35 have the cross-sectional two-face width shape, they may have other shapes that engage with each other in the rotation direction. For example, it may be a polygonal shape such as a quadrangle or a hexagon.

The shape of the metal plate 37 of the above embodiment is not limited to this, and may be changed as appropriate. Further, in the above embodiment, the metal plate 37 is inserted into the drive side rotating body 35, but the metal plate 37 may be assembled. The metal plate 37 may be omitted if the resin alone has sufficient rigidity.

The shape and material of the elastic holding portion 38 of the above embodiment is not limited to this, and may be changed appropriately. Further, although the elastic holding portion 38 is integrally formed with the driving side rotating body 35, it may be assembled to the driving side rotating body 35. Further, the elastic holding portion 38 may be omitted if there is no concern that the drive-side rotating body 35 will fall off the rotary shaft 6 during the assembly, such as assembly with the connecting portion 6a facing upward.

In the above embodiment, the clutch 20 is used as the connecting means for drivingly connecting the rotary shaft 6 and the worm shaft 23. However, the rotary shaft 6 and the worm shaft 2 other than the clutch 20 are used.
You may use the connection means which drive-connects with 3.

In the above embodiment, the configurations of the motor body 2 and the speed reducer 3 may be changed as appropriate. For example, the deceleration unit 3
A motor having a configuration in which a circuit board on which a control circuit for controlling the rotation of the motor 1 and a rotation detection element for detecting the rotation of the motor 1 are mounted in the (gear housing 21) may be incorporated.

In the above embodiment, the motor 1 is used as the drive source of the power window device, but it may be used as the drive source of other devices. The technical ideas that can be understood from each of the above embodiments will be described below.

(A) In the motor according to any one of claims 1 to 9, the rotary shaft, the worm shaft, and
A motor characterized in that at least one place between the connecting means and the connecting means is connected to each other by loose fitting. With this configuration, even if there is a shaft misalignment between the rotary shaft and the worm shaft, the shaft misalignment is allowed, so that a large noise is generated from the connecting portion between the rotary shaft and the worm shaft and the connecting means during rotation. It is possible to suppress the occurrence of vibration.

[0098]

As described in detail above, according to the present invention,
In a motor in which a rotating shaft of an armature and a worm shaft are connected to each other via a connecting means, misalignment between the rotating shaft and the worm shaft is suppressed as much as possible, and abnormal noise and vibration from the connecting means due to the shaft deviation are suppressed. It is possible to provide a motor that can.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a motor of this embodiment.

FIG. 2 is an enlarged cross-sectional view of a main part of a motor.

FIG. 3 is an exploded perspective view of a clutch portion.

FIG. 4 is a plan view of a gear housing.

FIG. 5A is a cross-sectional view of a brush holder,
(B) is a bottom view of the brush holder.

6A is a side view of the brush holder, FIG.
(B) is a plan view of the brush holder.

FIG. 7 is an exploded cross-sectional view for explaining assembly of a clutch portion.

8 is a cross-sectional view taken along the line AA of FIG.

FIG. 9 is a cross-sectional view for explaining the operation of the clutch.

FIG. 10 is a cross-sectional view for explaining the operation of the clutch.

FIG. 11 is a plan view showing a state where a brush holder is placed on a transfer pallet.

FIG. 12 is a side view showing a state where a brush holder is placed on a transfer pallet.

FIG. 13 is a plan view of a transfer pallet.

FIG. 14 is a side view of a transfer pallet.

FIG. 15 is a sectional view of a conventional motor.

FIG. 16 is an enlarged cross-sectional view of a main part of a conventional motor.

[Explanation of symbols]

2 ... Motor body, 3 ... Reduction unit, 4 ... Yoke housing,
6 ... Rotating shaft, 7 ... Armature, 8 ... Commutator, 9 ... Brush holder, 9c ... Holding part, 9d ... Positioning hole, 10 ... Brush, 12 ... Bearing, 13 ... Seal member, 20 ... Clutch as connecting means , 21 ... Gear housing, 21n ... Positioning projections constituting positioning means, 23 ... Worm shaft,
29 ... Driven rotary body, 35 ... Driven rotary body, 101 ... Transport pallet.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshiyuki Masuda             Asumo Corporation, 390 Umeda, Kosai City, Shizuoka Prefecture             In the company (72) Inventor Koji Shibata             Asumo Corporation, 390 Umeda, Kosai City, Shizuoka Prefecture             In the company F term (reference) 3J009 DA04 DA11 EA06 EA19 EB24                       EC06 FA04 FA30                 5H605 BB05 BB09 CC08 CC10 DD09                       EB06 EC05 EC07 EC16                 5H607 AA12 BB01 BB04 BB14 CC03                       DD19 EE32 EE36 FF13 GG08                       GG10                 5H623 AA04 BB07 GG13 GG22 JJ05                       JJ06 LL14

Claims (9)

[Claims] 1. A motor main body that rotatably accommodates an armature having a rotating shaft and a commutator in a yoke housing, and a brush that is disposed in an opening of the yoke housing and that is in sliding contact with the commutator and that rotates. A brush holder having a bearing that rotatably supports a shaft, a gear housing that is assembled with the yoke housing with the brush holder interposed, and a worm that is arranged in the gear housing substantially coaxially with the rotation shaft. A motor having a speed reducer having a shaft, and a connecting means for drivingly connecting the rotary shaft and the worm shaft when the both housings are assembled, wherein a positioning means is provided between the brush holder and the gear housing. A motor characterized by being provided. 2. A motor body that rotatably accommodates an armature having a rotation shaft and a commutator in a yoke housing, a brush that is disposed in an opening of the yoke housing and that is in sliding contact with the commutator, and the rotation is performed. A brush holder having a bearing that rotatably supports the shaft, a gear housing that is assembled with the yoke housing with the brush holder interposed, and a worm that is arranged in the gear housing substantially coaxially with the rotation shaft. A reduction unit having a shaft; a connecting unit for drivingly connecting the rotary shaft and the worm shaft when the both housings are assembled; and a positioning unit provided between the brush holder and the gear housing, At the time of assembling the both housings, the rotary shaft and the worm shaft are drivingly connected through a connecting means. Both motors, characterized in that said brush holder and the gear housing are positioned with respect to each other by the positioning means. 3. The motor according to claim 1, wherein the brush holder has a sandwiching portion sandwiched between the openings of the both housings over substantially the entire circumference, and the sandwiching portion. Has
A motor having a seal member made of an elastic member. 4. The motor according to claim 1, wherein the brush holder has a sandwiching portion sandwiched between the openings of the housings over substantially the entire circumference. The motor is characterized in that the positioning means is provided at a predetermined position inside the holding portion. 5. The motor according to any one of claims 1 to 4, wherein the positioning means is provided on one of the brush holder and the gear housing, and the other of the positioning projections. And a positioning hole that fits into the positioning protrusion. 6. The motor according to claim 5, wherein the positioning protrusion and the positioning hole have two or more. 7. The motor according to claim 6, wherein the positioning protrusion and the positioning hole are at least two.
The motors are arranged at substantially symmetrical positions about the rotation axis. 8. The motor according to claim 1, wherein the connecting means includes a drive-side rotating body that integrally rotates with the rotating shaft and a driven-side rotating body that integrally rotates with the worm shaft. And a rotational force from the rotary shaft is transmitted to the worm shaft via the drive-side rotary body and the driven-side rotary body, and a rotational force from the worm shaft is driven from the driven-side rotary body. It is a clutch configured so as not to be transmitted to the side rotating body, or the rotational force from the worm shaft is transmitted from the driven side rotating body by applying a predetermined frictional force to the driving side rotating body. Characteristic motor. 9. The motor according to claim 1, wherein the positioning means provided on the brush holder side is mounted when parts are assembled to the brush holder. A motor characterized by being used for positioning with a pallet.