JP2018038268A - Motor and power window device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor which enables a yoke housing to be easily manufactured even while having a structure which enables a holder member to be positioned relative to the yoke housing.SOLUTION: In a motor, a brush holder 8 disposed between a yoke housing 4 and a gear housing 21 includes: a holder member 31 assembled to an opening 4c of the yoke housing 4 and holding a brush 9; and a base member 41 having a connector part 8c and assembled to the holder member 31. At an output side end part of the yoke housing 4 (an end part of an opening 4c side), a flange part 4d for fixing the gear housing 21 to the yoke housing 4 is provided. At the holder member 31, a contact part 34, which contacts with the flange part 4d of the yoke housing 4 in an axial direction of a rotation shaft 10, is provided.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a motor and a vehicle power window device that are integrally provided with a speed reduction portion.

  Conventionally, in a motor, a brush holder is disposed between a housing (yoke housing) on the motor body side and a housing (gear housing) on the speed reduction unit side. In such a motor, the brush holder holds the brush. 2. Description of the Related Art A motor is known that includes a holder member that performs the above and a base member that has a connector portion and is assembled to the holder member (see, for example, Patent Document 1).

JP 2009-11076 A

  An object of the present invention is to provide a motor and a vehicle power window device that enable positioning of the holder member on the side opposite to the gear housing in the axial direction of the rotation shaft with respect to the yoke housing.

  A motor that solves the above-described problems has a brush holder disposed between a yoke housing and a gear housing, a holder member that is assembled to the opening of the yoke housing and holds a brush, and a connector portion. A base member to be assembled, and a gear housing side end portion of the holder member is provided with an abutting portion that extends in a direction orthogonal to the axis of the rotating shaft and abuts the yoke housing in the axial direction. The member is positioned toward the side opposite to the gear housing in the axial direction with respect to the yoke housing, the rotating shaft extends from the inside of the yoke housing toward the gear housing side, and the gear housing side end of the rotating shaft A worm shaft is drivingly connected to the section.

  In the motor, the yoke housing has a bottomed flat cylindrical shape having a pair of flat surfaces and curved surfaces connecting the flat surfaces, and the holder member corresponds to the curved surface of the yoke housing. It has a curved surface, and the contact portion is provided at the gear housing side end portion of the curved surface of the holder member.

  In the motor, an elastic member interposed in a compressed state is provided between the holder member and the base member, and the holder member is in a state in which the contact portion is in contact with the yoke housing in the axial direction. The yoke housing and the elastic member are held in the axial direction.

In the motor, the base member is provided with a holding portion for holding the substrate.
In the vehicle power window device that solves the above-described problems, the motor is used as a drive source.

  According to the present invention, the holder member can be positioned on the side opposite to the gear housing in the axial direction of the rotation shaft with respect to the yoke housing.

The side view of the motor of this embodiment. The partial sectional view of a motor. The top view of a brush holder. (A) The side view of a holder member, (b) The top view which looked at the holder member from the deceleration part side. Sectional drawing for demonstrating a to-be-clamped part. Sectional drawing for demonstrating an engaging claw and an engaging hole. The top view of a yoke housing and a holder member.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
A DC motor 1 of the present embodiment shown in FIG. 1 is a motor used as a drive source for a power window device mounted on a vehicle. The DC motor 1 includes a motor body 2 and a speed reduction unit 3.

  As shown in FIG. 2, the motor body 2 includes a yoke housing 4, a pair of magnets 5 (only one is shown in FIG. 2), an armature (armature) 6, a commutator 7, a brush holder 8, and a pair of brushes 9. It has.

  The yoke housing 4 has a bottomed flat cylindrical shape, and a pair of magnets 5 are fixed to the inner side surfaces of the curved surfaces 4b connecting the pair of flat surfaces 4a. An armature 6 is accommodated inside the magnet 5. The armature 6 has a rotating shaft 10, and the base end portion of the rotating shaft 10 is rotatably supported by a bearing (not shown) held at the center of the bottom of the yoke housing 4. A commutator 7 is fixed to the tip end side of the rotary shaft 10 and on the opening 4 c side of the yoke housing 4.

  A pair of flange portions 4d extending from the curved surface 4b to the radially outer side (left and right direction side in FIG. 1) are formed at the end portion (output side end portion) of the yoke housing 4 on the opening 4c side. A brush holder 8 is fixed to the opening 4 c of the yoke housing 4.

  The brush holder 8 is formed in a shape that substantially covers the opening 4 c of the yoke housing 4, that is, a substantially flat circular shape (see FIG. 3), and a holder main body 8 a that is partly inserted and accommodated in the yoke housing 4. The extending portion 8b extends from the holder main body 8a to the outside in the radial direction of the yoke housing 4 (left side in FIGS. 1 and 2), and the connector portion 8c is formed at the tip of the extending portion 8b.

  As shown in FIG. 2, the holder main body 8 a is provided with a pair of brush holding portions 11 for holding the brush 9 and a bearing holding portion 13 for holding the bearing 12. The holder body 8a is provided with electric parts such as a choke coil and a circuit breaker (not shown).

  The brush holder 8 is provided with a terminal 14 electrically connected to the brush 9. The terminal 14 extends from the holder body 8a to the connector portion 8c, and can be connected to a terminal of an external connector (not shown) fitted to the connector portion 8c. And the front end side (front end side from the commutator 7) of the rotating shaft 10 is rotatably supported by the bearing 12 held by the bearing holding portion 13.

  The speed reduction unit 3 includes a gear housing 21, a worm shaft 22, a worm wheel 23, and a clutch 24. In the present embodiment, the worm shaft 22 and the worm wheel 23 constitute a reduction mechanism for reducing the rotation of the rotary shaft 10.

  The gear housing 21 is made of synthetic resin, and is formed in a predetermined shape so as to accommodate the worm shaft 22, the worm wheel 23, and the clutch 24. The gear housing 21 has an opening 21 a that faces the opening 4 c of the yoke housing 4. The gear housing 21 and the yoke housing 4 sandwich the brush holder 8 in the axial direction, and are respectively inserted into screw holes 4e, 4f, 4g (see FIG. 7) formed through the flange portion 4d. It is fixed by a screw 25 screwed onto the housing 21 side (specifically, a nut held by the gear housing 21).

  The worm shaft 22 is rotatably supported by a bearing (not shown) provided in the gear housing 21 and is drivingly connected to the rotating shaft 10 extending from the motor body 2 via a clutch 24. The clutch 24 operates to lock the rotation of the worm shaft 22 so that the driving force from the rotating shaft 10 is transmitted to the worm shaft 22 and conversely the driving force from the worm shaft 22 is not transmitted to the rotating shaft 10. That is, the clutch 24 is provided to prevent the rotation of the DC motor 1 from the load side (output shaft side).

  The worm shaft 22 is meshed with the worm wheel 23. The worm wheel 23 is drivingly connected to an output shaft (not shown) arranged so as to be orthogonal to the worm shaft 22, and the output shaft is drivingly connected to a well-known wire type regulator that opens and closes the window glass of the vehicle. Will be. Then, when the output shaft (worm wheel 23) rotates, the regulator operates to open and close the window glass.

[Brush holder structure]
Next, the configuration of the brush holder 8 of the present embodiment will be described in detail.
The brush holder 8 includes a holder member 31 made of synthetic resin (see FIGS. 4A and 4B), a base member 41 made of synthetic resin (see FIG. 3), and a seal member 51 made of an elastic material such as an elastomer material. (See FIG. 3).

  As shown in FIGS. 3 and 4, the holder member 31 forms a part of the holder body 8 a and substantially covers the opening 4 c of the yoke housing 4, that is, the direction of the axis L of the rotary shaft 10. When viewed from a corresponding direction (hereinafter, simply referred to as an axial direction), it is formed in a substantially flat circular shape, and is fitted and inserted into the yoke housing 4 (see FIG. 7). The holder member 31 includes the brush holding portion 11, the bearing holding portion 13, a pair of positioning columns 32 (see FIGS. 4A and 4B) that constitute positioning means, and a pair of engaging claws 33 (see FIG. 4 and FIG. 6). The holder member 31 is provided with a holding portion for holding the choke coil, the circuit breaker, and the like.

  As shown in FIG. 3, the brush holding portions 11 are respectively formed in the center in the short direction at both longitudinal ends of the holder member 31 when viewed from the axial direction. The brush holding portion 11 is formed in a substantially quadrangular cylindrical shape penetrating in a direction substantially along the radial direction, and can hold a substantially quadrangular columnar brush 9 (see FIG. 2) inserted from the outside in the radial direction. Is formed. In addition, illustration of the brush 9 is abbreviate | omitted in FIG.

  The bearing holding portion 13 is formed at the center of the holder member 31 when viewed from the axial direction. The bearing holding portion 13 penetrates the holder member 31 and is formed on its inner peripheral surface so as to hold the bearing 12 (see FIG. 2).

  As shown in FIG. 4, one positioning column 32 is formed at a corner portion (upper left corner portion in FIG. 4B) of the holder member 31 when viewed from the axial direction, and a diagonal portion (see FIG. 4). 4 (b), another corner is formed on the lower right corner). Each positioning column 32 is configured to extend toward the gear housing 21 in the axial direction and penetrate the base member 41. A fitting hole 32a formed in the axial direction is formed at the distal end portion (the lower end portion in FIG. 4A) of each positioning column 32. A pair of positioning projections 21b (positioning means) that protrude from the inner surface of the gear housing 21 are fitted in the fitting holes 32a. That is, in the holder member 31, the positioning projection 21b of the gear housing 21 is fitted into the fitting hole 32a of the positioning column 32 (that is, the positioning column 32 and the positioning projection 21b are engaged in the direction perpendicular to the axis). Therefore, the gear housing 21 is positioned in a direction orthogonal to the axial direction.

  The engagement claws 33 are respectively formed at one end of the pair of linear portions of the holder member 31 in the longitudinal direction of the holder member 31 when viewed from the axial direction (see FIG. 4B). Each engagement claw 33 is formed at a position that is point-symmetric with respect to the axis L. The engagement claw 33 extends toward the gear housing 21 in the axial direction, and has a claw portion 33a (see FIG. 6) that is folded outward at the tip.

  In addition, the holder member 31 is formed with a pair of contact portions 34 extending in the direction perpendicular to the axis (longitudinal direction of the holder member 31). As shown in FIG. 2, the contact portions 34 extend from the lower end portions (end portions on the side of the gear housing 21) of both end surfaces (curved surfaces) in the longitudinal direction of the holder member 31. 34 is in contact with the flange portion 4d of the yoke housing 4 in the axial direction. Thereby, the holder member 31 is positioned in the axial direction with respect to the yoke housing 4.

  Further, each contact portion 34 is formed at the center portion in the short direction of the curved surface of the holder member 31. That is, the contact portions 34 are formed so as to sandwich the axis L (at positions facing the circumferential direction 180 degrees around the axis L). Further, as shown in FIG. 7, one of the pair of contact portions 34 (the contact portion 34 on the base extension portion 43 side (left side in FIG. 7)) connects the yoke housing 4 and the gear housing 21. It is located between screw holes (between the screw holes 4e and 4f) through which the screws 25 for fixing are inserted. That is, the abutting portion 34 is provided between the fixing portions for fixing the yoke housing 4 and the gear housing 21.

  The base member 41 constitutes a part of the holder main body 8a and is viewed from the axial direction (see FIG. 3). The base portion 42 is formed in a substantially flat circular shape slightly larger than the holder member 31, and the extending portion A base extending portion 43 that constitutes a part of 8 b and further extends from the longitudinal direction of the base portion 42, and the connector portion 8 c formed at the tip of the base extending portion 43 are provided.

  The terminal 14 is embedded in the base member 41 by insert molding. The terminal 14 extends from the connector portion 8 c to the base portion 42 through the inside of the base extending portion 43, and is electrically connected to the brush 9 and electric components provided on the holder member 31. As shown in FIG. 2, the base member 41 is provided with a holding portion 44 that holds the control circuit board 50. Further, a connection terminal 45 electrically connected to the control circuit board 50 is embedded in the base member 41 by insert molding, and the connection terminal 45 extends to the connector part 8c through the base extension part 43, It can be connected to the terminal of the external connector fitted to the connector portion 8c.

  The outer edge of the base portion 42 has a step with another surface (a step toward the gear housing 21, see FIG. 5), and extends in a flange shape further outward than the outer edge portion 31 a of the holder member 31. A flange portion 42a is formed.

  The seal member 51 is provided on the flange portion 42 a of the base portion 42. The seal member 51 is located outside the outer edge portion 31a of the holder member 31 and is provided so as to cover the flange portion 42a. Further, in the seal member 51, the inner side surface 51a of the portion closer to the holder member 31 than the flange portion 42a has a shape corresponding to the outer edge portion 31a of the holder member 31, and the holder member 31 is free to play on the inner side surface 51a. It is fitted (fitting in a range that allows movement of the holder member 31 in the axial direction and the direction perpendicular to the axis).

  Further, the seal member 51 is provided so as to cover the base end side of the base extending portion 43. The seal member 51 is provided integrally with the base member 41 using the base member 41 as an insert. The seal member 51 is sandwiched between the yoke housing 4 and the gear housing 21 in a state where the brush holder 8 is sandwiched between the yoke housing 4 and the gear housing 21, and the base member 41 and the yoke housing 4. And the gear housing 21 are sealed.

  The sealing member 51 is formed with a sandwiched portion 52 as an elastic member (see FIGS. 3 and 5). Two sandwiched portions 52 are provided on each of a pair of straight portions of the seal member 51 (portions corresponding to the straight portions of the holder member 31) (see FIG. 3). The sandwiched portion 52 is integrally formed with the seal member 51 so as to protrude inwardly (from the holder member 31 side) from the inner side surface 51 a of the seal member 51, and the lower end portion of the outer edge portion 31 a of the holder member 31 It is sandwiched between the flange portion 42a of the base portion 42 in the axial direction (see FIG. 5). That is, the sandwiched portion 52 is interposed in a compressed state between the holder member 31 and the flange portion 42a of the base portion 42 in the axial direction. The sandwiched portion 52 is formed so that the axial thickness is thinner than other portions of the seal member 51.

  As shown in FIG. 6, an engagement hole 42 b is formed in the base portion 42 at a position corresponding to the engagement claw 33 of the holder member 31 so that the holder 42 can be assembled. When the base member 41 and the holder member 31 are assembled, the engaging claw 33 is inserted into the engaging hole 42b in the axial direction, and the claw portion 33a of the engaging claw 33 is formed on the outer surface of the engaging hole 42b. Engages with the stepped portion 42c. Thus, the holder member 31 and the base member 41 are temporarily fixed before the yoke housing 4 and the gear housing 21 are assembled, and the base member 41 is prevented from being detached from the holder member 31 in the assembling process. It has become. FIG. 6 shows the relationship between the engaging claw 33 and the stepped portion 42c before the yoke housing 4 and the gear housing 21 are assembled and the holder member 31 and the base member 41 are temporarily fixed. Yes.

  As shown in FIGS. 2 and 3, in the base portion 42, receiving recesses 46 are respectively formed at positions corresponding to the pair of contact portions 34 of the holder member 31, and in each of the receiving recesses 46, the holder member 31. The abutting portions 34 are respectively accommodated. Each housing recess 46 is formed by cutting out a part of the inner side surface 51a of the portion on the holder member 31 side of the seal member 51 formed in the flange portion 42a of the base portion 42 (a part of the seal member 51 in FIG. 3). It is formed to be thin). That is, each housing recess 46 is formed inside the seal member 51 (the contact portion between the seal member 51 and the yoke housing 4). For this reason, the inside of the accommodation recessed part 46 for accommodating the contact part 34 is reliably sealed by the seal member 51. The housing recess 46 on the base extension 43 side is formed by cutting out the seal member 51 formed on the base extension 43.

  Further, the bottom surface in the axial direction of the housing recess 46 on the side opposite to the base extending portion is configured by the flange portion 42a of the base portion 42, and the bottom surface in the axial direction of the housing recess 46 on the base extending portion 43 side is the base portion. 42 is composed of a flange portion 42a and a base extending portion 43. The bottom surface of each housing recess 46 is located closer to the gear housing 21 (on the opposite side of the holder member) than the contact surface 51b of the seal member 51 with the flange portion 4d of the yoke housing 4. That is, each receiving recess 46 has a shape that is recessed in the axial direction when viewed from the holder member 31 side of the base portion 42. When the contact portion 34 of the holder member 31 is stored in the storage recess 46, a portion where the contact portion 34 and the seal member 51 overlap in the axial direction is generated. That is, since the axial thickness of the contact portion 34 is absorbed by the housing recess 46, the brush holder 8 and thus the motor 1 as a whole are prevented from being enlarged in the axial direction.

  In the brush holder 8 as described above, the seal member 51 is in a state before the yoke housing 4 and the gear housing 21 are assembled and the holder member 31 and the base member 41 are temporarily fixed by the engaging claws 33. Each of the sandwiched portions 52 is not compressed in the axial direction by the holder member 31 and the base-side flange portion 42a, and is engaged so that there is a backlash between the base member 41 and the holder member 31 in the axial direction. The length of the nail 33 in the axial direction is designed. Unlike the present embodiment, when the base member 41 and the holder member 31 are configured so that there is no backlash between the base member 41 and the holder member 31 in the temporarily fixed state, the clamped portion 52 is connected to the holder member 31 and the base-side flange portion 42a. Thus, it is necessary to engage the engaging claw 33 and the stepped portion 42c in a state compressed in the axial direction. In this case, stress is always applied to the engaging claw 33 in the temporarily fixed state, and the strength of the engaging claw 33 sufficient to compress the sandwiched portion 52 is required. In that respect, in this embodiment, since there is a backlash between the base member 41 and the holder member 31 in the temporarily fixed state, the strength of the engaging claw 33 can be relatively low. Yes.

  When the yoke housing 4 and the gear housing 21 are assembled with the screw 25 to the brush holder 8 in the temporarily fixed state, the seal member 51 of the base member 41 is sandwiched between the yoke housing 4 and the gear housing 21 in the axial direction. Compressed. At this time, since the contact portion 34 of the holder member 31 is in contact with the flange portion 4 d of the yoke housing 4, the contact portion 34 receives an axial pressing force from the flange portion 4 d of the yoke housing 4, and the holder member 31. Is slightly pushed in the axial direction with respect to the base portion 42. Then, the holder member 31 compresses the sandwiched portion 52 of the seal member 51 in the axial direction with the base-side flange portion 42a. Thereby, since the holder member 31 is elastically clamped in the axial direction by the yoke housing 4 and the sandwiched portion 52 of the seal member 51, the holder member 31 is positioned without rattling in the axial direction. 31 and the base member 41 can be easily assembled with each other without increasing the dimensional accuracy.

  In the state where the yoke housing 4 and the gear housing 21 are assembled, the claw portion 33a of the engagement claw 33 is separated from the stepped portion 42c of the base portion 42, and the holder including the contact portion 34 is provided. It is comprised so that the clearance gap D may exist between the axial direction of the member 31 and the base side flange part 42a (refer FIG. 2). That is, the contact portion 34 of the holder member 31 is configured not to contact the base side flange portion 42 a in the housing recess 46. The holder member 31 has dimensions and the like set on the basis of the contact surface of the contact portion 34 with the flange portion 4d of the yoke housing 4. For this reason, it is not necessary to form a positioning structure such as a step in the yoke housing 4 as in the prior art, and as a result, it is possible to configure the positioning structure in the axial direction of the holder member 31 easily and at low cost. ing.

Next, characteristic effects of the present embodiment will be described.
(1) In the present embodiment, the brush holder 8 disposed between the yoke housing 4 and the gear housing 21 is assembled to the opening 4c of the yoke housing 4 to hold the brush 9; 8c and a base member 41 assembled to the holder member 31, and at the output side end of the yoke housing 4 (the end on the opening 4c side in the axial direction), the gear housing 21 is attached to the yoke housing 4. A flange portion 4 d for fixing is provided, and the holder member 31 is provided with a contact portion 34 that contacts the flange portion 4 d of the yoke housing 4 in the axial direction of the rotary shaft 10. Therefore, since the abutting portion 34 of the holder member 31 abuts on the flange portion 4d of the yoke housing 4, the holder member 31 is positioned in the axial direction of the rotary shaft 10 with respect to the yoke housing 4. It is not necessary to provide a stepped portion for positioning the holder member 31 inside, and as a result, the yoke housing 4 can be easily manufactured while the holder member 31 can be positioned with respect to the yoke housing 4. It becomes.

  (2) In the present embodiment, the holder member 31 is loosely fitted to the base member 41 in the axial direction and the axis orthogonal direction of the rotary shaft 10, so that the dimensional accuracy of the holder member 31 and the base member 41 is high. Thus, it is possible to facilitate the assembly of each other.

  (3) In the present embodiment, the base member 41 is provided with an accommodation recess 46 that accommodates the abutment portion 34 of the holder member 31, and thus the axial thickness of the abutment portion 34 of the holder member 31 is set to the accommodation recess 46. As a result, an increase in the size of the motor 1 in the axial direction can be suppressed.

  (4) In the present embodiment, since the sandwiched portion 52 as an elastic member interposed in a compressed state is provided between the holder member 31 and the base member 41, the holder member 31 and the base member 41 can be easily connected. The backlash between the holder member 31 and the base member 41 can be prevented while being able to be assembled.

  (5) In the present embodiment, the base member 41 is provided with the annular seal member 51 in contact with the flange portion 4 d of the yoke housing 4, and the accommodation recess 46 is provided inside the seal member 51. The inside of 46 can be reliably sealed.

  (6) In this embodiment, since the contact part 34 is accommodated in the accommodation recessed part 46 formed by notching a part of the inner periphery (inner side surface 51a) of the seal member 51, the sealing performance of the seal member 51 is improved. While ensuring, the contact part 34 can be largely set in the direction perpendicular to the axis.

(7) In the present embodiment, since the sandwiched portion 52 is formed integrally with the seal member 51, it is possible to suppress an increase in the number of parts and the number of assembly points.
(8) In the present embodiment, since at least one pair of the abutting portions 34 is provided so as to sandwich the axis L of the rotary shaft 10, the holder member 31 can be positioned with respect to the yoke housing 4 in a balanced manner.

  (9) In the present embodiment, at least three fixing portions (screws 25 and screw holes 4e to 4g) for fixing the yoke housing 4 and the gear housing 21 are provided, and the contact portion 34 is provided between the fixing portions (screw holes). 4e and the screw hole 4f). Accordingly, since the holder member 31 is stably held by the yoke housing 4 and the gear housing 21, the positioning state of the contact portion 34 of the holder member 31 can be reliably maintained.

  (10) In the present embodiment, the holder member 31 and the gear housing 21 are each provided with the positioning column 32 and the positioning convex portion 21b that are engaged with each other in the direction orthogonal to the axis, and therefore, regardless of the dimensional error of the base member 41. The position of the holder member 31 can be made constant with respect to the gear housing 21 by the positioning column 32 and the positioning convex portion 21b. Therefore, for example, the position of the brush held by the holder member 31 can be made constant with respect to the yoke housing 4 and the gear housing 21.

In addition, you may change embodiment of this invention as follows.
In the above embodiment, the shape, the number, the position to be provided, and the like of the contact portion 34 may be changed as appropriate according to the configuration.

  In the above embodiment, the sandwiched portion 52 as an elastic member is formed integrally with the seal member 51, but may be provided as a separate member from the seal member 51. Further, the shape, the number, the position to be provided, and the like of the sandwiched portions may be appropriately changed according to the configuration.

  In the above embodiment, the positioning means is constituted by the positioning convex portion 21 b of the gear housing 21 and the positioning column 32 (fitting hole 32 a) of the holder member 31, but other than this, for example, on the inner surface of the gear housing 21 You may comprise a positioning means by the formed recessed part and the positioning pillar 32 inserted by the recessed part. Moreover, you may change suitably the shape of the positioning column 32 (fitting recessed part 42a) and the positioning convex part 21b of this embodiment, the number, the position to provide, etc. according to a structure.

  In the above embodiment, the yoke housing 4 and the gear housing 21 are fixed by the screws 25. However, the present invention is not particularly limited thereto, and may be appropriately changed according to the configuration.

  In the above-described embodiment, the DC motor 1 is used as a drive source for the power window device. However, the DC motor 1 may be used as a drive source for other devices.

  By the way, conventionally, in a motor, a brush holder is disposed between a housing (yoke housing) on the motor body side and a housing (gear housing) on the speed reduction unit side. In such a motor, 2. Description of the Related Art A motor that includes a holder member that holds a brush and a base member that has a connector portion and is assembled to the holder member is known (see, for example, Patent Document 1). In such a motor, when assembling the brush holder to the yoke housing, the problem is how to position the holder member accommodated in the yoke in the axial direction with respect to the yoke housing. For example, in the motor of Patent Document 1, a positioning step portion is formed on the side portion of the yoke housing, and the holder member is brought into contact with the step portion in the axial direction, and the base member is brought into contact with the base member in the axial direction on the opposite side. By doing so, the holder member is positioned in the axial direction.

  However, in the motor as described above, the stepped portion for positioning the holder member formed on the side portion of the yoke housing complicates the configuration of the side portion of the yoke housing.

  The following configuration has been made in order to solve the above-described problem. The purpose of the configuration is to complicate the configuration of the side portion of the yoke housing while the holder member can be positioned with respect to the yoke housing. An object of the present invention is to provide a motor capable of solving the problem.

A brush holder disposed between the yoke housing and the gear housing has a holder member that is assembled to the opening of the yoke housing and holds the brush, and a base member that has a connector portion and is assembled to the holder member. And
A flange portion for fixing the gear housing to the yoke housing is provided at the output side end of the yoke housing,
An elastic member interposed in a compressed state is provided between the holder member and the base member, and the holder member is elastically held in the axial direction between the yoke housing and the elastic member,
The base member is provided with a seal member interposed between the yoke housing and the base member and sealing between the yoke housing and the base member,
The holder member is provided with a contact portion that contacts the flange portion of the yoke housing in the axial direction of the rotation shaft,
In the state in which the seal member is interposed between the yoke housing and the base member, the contact portion is separated from the base member by a gap.

  According to this configuration, the holder member is positioned in the axial direction of the rotation shaft with respect to the yoke housing by the contact portion of the holder member coming into contact with the flange portion of the yoke housing. There is no need to provide a step for positioning the member. Therefore, it is possible to solve the problem that the configuration of the side portion of the yoke housing is complicated while the holder member can be positioned with respect to the yoke housing.

Further, rattling between the holder member and the base member can be prevented while the holder member and the base member can be easily assembled.
The holder member is loosely fitted to the base member.

According to this configuration, it is possible to facilitate the mutual assembly without increasing the dimensional accuracy of the holder member and the base member.
The base member is provided with the annular seal member that contacts the flange portion of the yoke housing, and the elastic member is formed integrally with the seal member.

According to this configuration, it is possible to suppress an increase in the number of parts and the number of assembly points.
-At least one pair of said contact parts is provided so that the axis line of the said rotating shaft may be pinched | interposed.

According to this configuration, the holder member can be positioned with good balance with respect to the yoke housing.
The holder member and the gear housing are provided with positioning means that engage with each other in the direction perpendicular to the axis.

  According to this configuration, regardless of the dimensional error of the base member, the position of the holder member can be made constant with respect to the gear housing by the positioning means. Therefore, for example, the position of the brush held by the holder member can be made constant with respect to the yoke housing and the gear housing.

  The purpose of the following configuration is to bring the abutting portion of the holder member into contact with the opening side end portion of the yoke housing toward the side opposite to the gear housing in the axial direction of the rotation shaft. An object of the present invention is to provide a motor that enables positioning on the side opposite to the gear housing in the axial direction of the rotation shaft with respect to the shaft.

  A brush holder disposed between the yoke housing and the gear housing has a holder member that is assembled to the opening of the yoke housing and holds the brush, and a base member that has a connector portion and is assembled to the holder member. A flange portion for fixing the gear housing to the yoke housing is provided at the opening side end of the yoke housing, and the base member is interposed between the yoke housing and the base member. A seal member is provided for sealing between the yoke housing and the base member, and the holder member is directed toward the opposite side of the gear housing in the axial direction of the rotation shaft with respect to the opening side end of the yoke housing. A contact portion is provided, and the seal member is disposed between the yoke housing and the base member. In Zaisa state, the contact portion is spaced from the base member by a gap.

  An object of the following configuration is to provide a motor and a vehicle power window device that enable positioning of the holder member on the side opposite to the gear housing in the axial direction of the rotation shaft with respect to the yoke housing.

  A brush holder disposed between the yoke housing and the gear housing has a holder member that is assembled to the opening of the yoke housing and holds the brush, and a base member that has a connector portion and is assembled to the holder member. The yoke housing has a bottomed flat cylindrical shape having a pair of flat surfaces and curved surfaces respectively connecting the flat surfaces, and the holder member is a curved surface corresponding to the curved surface of the yoke housing. A contact portion that extends in a direction orthogonal to the axis of the rotation shaft and contacts the yoke housing in the axial direction is provided at the end of the curved surface of the holder member on the side of the gear housing. , Positioned toward the opposite side of the gear housing in the axial direction with respect to the yoke housing, and between the holder member and the base member An elastic member interposed in a compressed state is provided, and the holder member is clamped in the axial direction between the yoke housing and the elastic member in a state where the contact portion is in axial contact with the yoke housing. .

  In the motor, a flange portion for fixing the gear housing to the yoke housing is provided at the opening side end portion of the yoke housing, and the base member is in contact with the flange portion of the yoke housing. An annular seal member is provided, and the elastic member is provided inside the annular seal member.

In the motor, at least one pair of the contact portions is provided so as to sandwich the axis of the rotation shaft.
In the vehicle power window device, the motor is used as a drive source.

  DESCRIPTION OF SYMBOLS 1 ... Motor, 4 ... Yoke housing, 4d ... Flange part, 4e-4g ... Screw hole which comprises a fixed part, 8 ... Brush holder, 8c ... Connector part, 9 ... Brush, 10 ... Rotary shaft, 21 ... Gear housing, 21b ... Positioning convex part as positioning means, 25 ... Screw constituting the fixing part, 31 ... Holder member, 32 ... Positioning column as positioning means, 34 ... Abutting part, 41 ... Base member, 46 ... Housing concave part, 51 ... sealing member, 52 ... sandwiched portion as an elastic member, L ... axis.

Claims (5)

A brush holder disposed between the yoke housing and the gear housing has a holder member that is assembled to the opening of the yoke housing and holds the brush, and a base member that has a connector portion and is assembled to the holder member. ,
An end of the holder member on the gear housing side is provided with an abutting portion extending in a direction orthogonal to the axis of the rotation shaft and abutting with the yoke housing in the axial direction. Positioned toward the side opposite the gear housing in the axial direction,
The rotating shaft extends from the yoke housing toward the gear housing, and a worm shaft is drivingly connected to an end of the rotating shaft on the gear housing side. The yoke housing has a bottomed flat cylindrical shape having a pair of flat surfaces and curved surfaces connecting the flat surfaces,
The holder member has a curved surface corresponding to the curved surface of the yoke housing;
The motor according to claim 1, wherein the contact portion is provided at an end portion on the gear housing side of the curved surface of the holder member. An elastic member interposed in a compressed state is provided between the holder member and the base member,
The said holder member is clamped by the said yoke housing and the said elastic member in the axial direction in the state which the said contact part contact | abutted with the said yoke housing in the axial direction, The Claim 1 or 2 characterized by the above-mentioned. motor.   The motor according to claim 1, wherein the base member is provided with a holding portion that holds the substrate.   A power window device for a vehicle in which the motor according to any one of claims 1 to 4 is used as a drive source.