JP2013201821A - Brush holder, brush device, motor, and method for manufacturing brush device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brush holder that facilitates connection of pigtails and terminals and that is also inexpensively manufacturable.SOLUTION: A brush holder 22 includes: a first end that holds brushes 23 and 24 for feeding an armature; a second end E2 that is provided on an opposite side of the first end and holds terminals 25 and 26 that are connected to the respective brushes 23 and 24 through pigtails 40; and cutouts 41 and 42 which penetrate from the first end to the second end E2 and open to an outer circumferential side and through which connecting sections 25b and 26b, of the respective terminals 25 and 26, with the pigtails 40 connected thereto are passed.

Description

  The present invention relates to a brush holder that holds a power supply brush and a motor including the brush holder.

For example, as described in Patent Document 1, there is a motor with a speed reducer integrated with a speed reducer. This type of motor is often used in automobiles and the like.
The motor described in Patent Document 1 is formed by connecting a motor body and a speed reducer. An armature is rotatably accommodated inside a bottomed cylindrical yoke housing constituting the motor body, and a brush device is fitted into an opening of the yoke housing. And the speed-reduction part is connected with the yoke housing in the state which interposed the brush apparatus between yoke housings. The brush device includes a brush holder that is fitted into the opening of the yoke housing so as to close the opening of the yoke housing. The brush holder holds a plurality of brushes slidably in contact with the commutator of the armature at the end of the brush holder on the inner side of the yoke housing. Each brush is connected to a plurality of terminals insert-molded in the brush holder via a pigtail. Each terminal protrudes from the end of the inner side of the yoke housing in the brush holder to be connected to each brush, while connecting to a connector part provided on the speed reducer for power supply etc. In order to be connected to the external connector, the brush holder protrudes from the outer end of the yoke housing to the outside of the yoke housing.

JP 2009-33956 A

  By the way, in the brush apparatus described in patent document 1, it hold | maintains in the said brush holder by insert-molding a some terminal in a brush holder. Therefore, each terminal can be easily protruded to both the inner side and the outer side of the yoke housing in the brush holder. Furthermore, since the brush holder can hold the terminal without rattling with respect to the brush holder, the position of the terminal is stable when the pigtail is connected to the terminal, and the pigtail can be easily connected to the terminal. . However, because it requires a mold for insert molding, it requires high design technology and advanced manufacturing processes such as mold design and insert injection molding using the mold, which increases manufacturing costs. There was a problem.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a brush holder that can easily connect a pigtail and a terminal and can be manufactured at a low cost. It is in providing the brush apparatus provided, the motor provided with this brush apparatus, and the manufacturing method of this brush apparatus.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a first end portion for holding a brush for supplying power to the armature, and the brush provided on a side opposite to the first end portion via a pigtail. A second end that holds a terminal that is electrically connected to the terminal, and a connecting portion that penetrates from the first end to the second end and opens to the outer peripheral side and is connected to the pigtail in the terminal. The gist is that the brush holder is provided with a cutout.

  According to this configuration, after connecting the brush to the connection portion of the terminal via the pigtail, it is possible to place the terminal at the second end portion while inserting the connection portion into the notch from the second end side. is there. Because the notch opens to the outer periphery of the brush holder, when inserting the connecting part into the notch, pull the end of the pigtail where the brush is connected from the notch opening to the outer periphery of the brush holder. Thus, it is possible to arrange the brush on the outer peripheral side of the brush holder. Then, by moving the brush from the outer peripheral side of the brush holder toward the first end, it is possible to easily arrange the brush at the first end. From these things, it becomes possible to connect a pigtail to the connection part of a terminal, before arrange | positioning a terminal in a brush holder. Therefore, since it is possible to connect the pigtail to the connection portion of the terminal without being affected by the positional deviation of the terminal with respect to the brush holder, it is possible to easily connect the pigtail and the terminal. Moreover, since it is not necessary to insert-mold a terminal in a brush holder, a brush holder can be manufactured cheaply.

  The invention according to claim 2 is the brush holder according to claim 1, the brush held by the brush holder at the first end, and held by the brush holder at the second end. A terminal in which the connection portion is inserted into the notch from the second end side to the first end side, and one end portion of which is electrically connected to the brush and the other end portion of the connection portion. The gist of the present invention is that the brush device is provided with a pigtail electrically connected to the head.

  According to this configuration, after connecting the brush to the connection portion of the terminal via the pigtail, the terminal can be disposed at the second end portion while inserting the connection portion into the notch from the second end side. Because the notch opens to the outer periphery of the brush holder, when inserting the connecting part into the notch, pull the end of the pigtail where the brush is connected from the notch opening to the outer periphery of the brush holder. Thus, the brush can be disposed on the outer periphery of the brush holder. And a brush can be easily arrange | positioned to a 1st end part by moving a brush toward the 1st end part from the outer peripheral side of a brush holder. From these facts, it is possible to connect the pigtail to the connecting portion of the terminal before placing the terminal on the brush holder. Therefore, since the pigtail can be connected to the connection portion of the terminal without being affected by the positional deviation of the terminal with respect to the brush holder, the pigtail and the terminal can be easily connected. Moreover, the manufacturing cost of the said brush apparatus can be reduced by having provided the brush holder manufactured cheaply.

  According to a third aspect of the present invention, in the brush device according to the second aspect, the notch includes the connection portion and the pigtail connected to the connection portion from the second end side to the first end portion. The gist is that the brush is of a size that cannot be inserted from the second end portion side to the first end portion side.

  According to the same configuration, the brush is arranged on the outer periphery of the brush holder by pulling the end of the pigtail on the side where the brush is connected to the outer periphery of the brush holder from the opening of the notch while keeping the size of the notch small. Can do. And by suppressing the magnitude | size of a notch small, while being able to suppress the fall of the intensity | strength of a brush holder, the freedom degree of the position which provides a notch in a brush holder increases.

  According to a fourth aspect of the present invention, there is provided a bottomed cylindrical yoke housing, an armature having a commutator rotatably disposed inside the yoke housing, the first end portion on the inner side of the yoke housing, and The brush holder is fitted into the opening of the yoke housing so that the second end faces the outside of the yoke housing, the terminal extends to the outside of the yoke housing, and the brush is rectified. The brush device according to claim 2, which is in sliding contact with the child, and a reduction gear connected to the opening of the yoke housing and decelerating and outputting the rotation of the armature. It is a summary.

According to this configuration, the manufacturing cost of the motor of the present invention can be reduced by providing the brush device with reduced manufacturing cost.
According to a fifth aspect of the present invention, in the method for manufacturing the brush device according to the second or third aspect, one end of the pigtail is electrically connected to the brush, and the other end of the pigtail is connected. A connection step of electrically connecting to the part, and after the connection step, passing the pigtail through the opening facing the outer peripheral side of the brush holder in the notch so that the brush passes the outer periphery of the brush holder, Inserting the connecting portion into the notch from the second end side toward the first end, and arranging the terminal at the second end, and after the terminal arranging step, the terminal The gist of the invention is that it includes a brush arrangement step of arranging a brush at the first end.

  According to this method, since the terminal is not arranged with respect to the brush holder in the connection step, the pigtail can be connected to the connection portion of the terminal without being affected by the positional displacement of the terminal with respect to the brush holder. Therefore, the connection between the pigtail and the terminal can be easily performed. In the terminal placement step, when the terminal is placed at the second end while the connection portion is inserted into the notch, the pigtail is passed through the notch opening so that the brush passes through the outer periphery of the brush holder. Even a terminal to which a brush is connected via a can be easily arranged at the second end. Further, the connecting portion can be protruded toward the first end without embedding the terminal by insert molding. And in a brush arrangement | positioning process, the brush arrange | positioned in the terminal arrangement | positioning process can be easily arrange | positioned to a 1st end part by moving the brush arrange | positioned on the outer periphery of a brush holder toward the 1st end part.

  According to the present invention, it is possible to easily connect the pigtail and the terminal and to manufacture the brush holder at a low cost, the brush device including the brush holder, the motor including the brush device, and the A method of manufacturing a brush device can be provided.

The partial cross section figure of a motor. The bottom view of a brush apparatus. Sectional drawing of a brush apparatus. The top view of a brush apparatus. The bottom view of the brush apparatus for demonstrating the manufacturing method of a brush apparatus. (A) is sectional drawing of the brush apparatus for demonstrating the manufacturing method of a brush apparatus, (b) And (c) is a side view of the terminal to which the brush was connected.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
A motor 1 shown in FIG. 1 is used as a drive source of a power window device (not shown) mounted on a vehicle, for example. The motor 1 is a motor with a speed reducer provided with a motor main body 2 and a speed reducer 3 that reduces the rotation of the motor main body 2 to generate a high torque and transmits it to the power window device.

  A yoke housing 4 (hereinafter referred to as a yoke 4) constituting the motor body 2 is made of a conductive metal material and is formed in a bottomed cylindrical shape. The cylindrical cylindrical portion 4a constituting the side wall of the yoke 4 has a cross-sectional shape orthogonal to the axial direction that forms a track shape, and is formed in a flat shape (a shape having a longitudinal direction). In addition, a flange-like flange portion 4 c extending toward the outside of the yoke 4 is formed in the opening portion 4 b of the yoke 4.

  A plurality of magnets 5 are arranged and fixed on the inner surface of the yoke 4 so as to face each other. An armature 6 is rotatably housed inside the opposing magnets 5. The armature 6 includes a rotating shaft 7, an armature core 9 fixed to the rotating shaft 7 and wound with an armature coil 8, and a distal end side of the rotating shaft 7 with respect to the armature core 9 (the left end in FIG. 1). And a commutator 10 fixed to the rotary shaft 7 on the part side). A base end portion (right end portion in FIG. 1) of the rotating shaft 7 is pivotally supported by a bearing 11 provided at the bottom center of the yoke 4. Further, the armature core 9 and the commutator 10 are disposed inside the yoke 4, while the distal end portion of the rotating shaft 7 protrudes from the opening 4 b of the yoke 4 to the outside of the yoke 4.

  The commutator 10 has a cylindrical shape that is coaxial with the rotating shaft 7, and includes a plurality of segments 10 a that are arranged in parallel in the circumferential direction on the outer peripheral surface thereof. The armature coil 8 is electrically connected to all the segments 10a or a part of the segments 10a.

  A brush device 21 constituting the motor body 2 is assembled to the opening 4b of the yoke 4 so as to close the opening 4b. The brush device 21 is formed by assembling two brushes 23 and 24 (first brush 23 and second brush 24) and two terminals 25 and 26 (first terminal 25 and second terminal 26) on the brush holder 22. Has been. In FIG. 1, only one terminal 25 of the two terminals 25 and 26 is shown.

As shown in FIG. 2, the brush holder 22 is made of an insulating material such as a synthetic resin, and includes a holder main body 31 and a connector forming portion 32 formed integrally with the holder main body 31.
As shown in FIGS. 1 and 2, the outer shape of the holder main body 31 has a track shape corresponding to the shape of the opening of the yoke 4. Accordingly, the side wall 33 provided on the outer peripheral edge of the holder main body 31 is connected to the pair of straight portions 33a and 33b that extend in a straight line and are parallel to each other, and the ends of the pair of straight portions 33a and 33b. It is comprised from a pair of circular arc-shaped parts 33c and 33d extended in the direction. The outer shape of the holder body 31 is formed to be slightly smaller than the opening 4b of the yoke 4 and has a shape having a longitudinal direction. A first straight line L1 extending in the longitudinal direction of the holder body 31 through the center in the short direction of the holder body 31 and a first line L1 extending in the width direction of the holder body 31 through the center in the longitudinal direction of the holder body 31. The intersection point O of the two straight lines L <b> 2 is the center of the holder body 31. And a pair of circular arc part 33c, 33d has comprised the circular arc shape which makes the intersection O the center of curvature. In addition, fitting projections 34 are formed at both ends in the longitudinal direction of the straight portions 33a and 33b and the arc portions 33c and 33d, respectively. Each fitting protrusion 34 has a spherical shape protruding to the outer peripheral side of the holder main body 31.

  The connector forming portion 32 extends along the longitudinal direction of the holder main body 31 from one end portion (the upper end portion in FIG. 2) of the holder main body 31 in the longitudinal direction. As shown in FIG. 3, of the both ends of the holder body 31 in the thickness direction of the brush holder 22 (the same as the axial direction of the motor body 2), the left end in FIG. 22, the right end provided on the opposite side of the first end E1 is referred to as a second end E2. And the connector formation part 32 is extended along the longitudinal direction of the holder main body 31 from the edge part by the side of the 2nd end E2 in the holder main body 31. As shown in FIG. As shown in FIG. 2, the connector forming portion 32 has a rectangular shape when viewed from the thickness direction of the holder body 31.

  As shown in FIGS. 1 and 2, the brush holder 22 has a first end E1 facing the inner side of the yoke 4 (bottom side of the yoke 4) and a second end E2 facing the outer side of the yoke 4 (yoke 4). Is attached to the opening 4b of the yoke 4 so as to face the speed reducer 3 side). And the front-end | tip part of the said fitting protrusion 34 each formed in linear part 33a, 33b and circular arc part 33c, 33d is contacting the inner peripheral surface of the yoke 4, respectively. The first end E1 of the brush holder 22 is disposed inside the yoke 4, while the second end E2 is disposed at a position slightly protruding from the opening of the yoke 4 toward the speed reducer 3 side. Further, the connector forming portion 32 is located outside the yoke 4 and extends to a position outside the cylindrical portion 4a along the radial direction (the radial direction of the arc portions 33c and 33d).

  As shown in FIG.1 and FIG.3, the holder main body 31 is holding the bearing 35 in the center part. A portion on the tip side of the rotary shaft 7 penetrates the holder main body 31 in the axial direction and is supported by a bearing 35. That is, the rotating shaft 7 is supported by the bearing 35 and the bearing 11. The end of the holder body 31 on the first end E1 side is adjacent to the commutator 10 fixed to the rotating shaft 7 and the yoke 4 in the axial direction.

  As shown in FIGS. 1, 3, and 4, a pair of brush holding portions 36 and 37 (a first brush holding portion 36 and a second brush holding portion are provided on the end portion of the holder main body 31 on the first end E1 side. 37) is formed. The pair of brush holding portions 36 and 37 are formed on both sides in the longitudinal direction of the holder main body 31 with the bearing 35 interposed therebetween at the end of the holder main body 31 on the first end E1 side. Specifically, the pair of brush holding portions 36 and 37 are respectively formed on the first straight line L1 on both sides of the second straight line L2 at the end on the first end E1 side of the holder main body 31, and the inside of the yoke 4 Is located on both sides of the commutator 10 in the diameter direction. In the present embodiment, of the pair of brush holding portions 36 and 37, the brush holding portion closer to the connector forming portion 32 is defined as the first brush holding portion 36, and the brush holding portion farther from the connector forming portion 32 is the first brush holding portion. The two brush holding unit 37 is used.

  The two brush holding portions 36 and 37 are formed at two positions 180 degrees apart in the circumferential direction at the end portion of the holder main body 31 on the first end E1 side, and the radial direction (commutator) along the first straight line L1. 10 in the radial direction). On the upper wall portion 38 of each brush holding portion 36, 37, an insertion groove 39 is formed extending radially inward from the radially outer end of each brush holding portion 36, 37.

  The first brush 23 is inserted into the first brush holder 36, while the second brush 24 is inserted into the second brush holder 37. The first brush 23 and the second brush 24 have a quadrangular prism shape and the same shape. The brushes 23 and 24 are urged radially inward (that is, toward the outer peripheral surface of the commutator 10) by a torsion spring (not shown) arranged in the vicinity of the brush holding portions 36 and 37 in which the brushes 23 and 24 are accommodated. ing. The brushes 23 and 24 are guided by the inner peripheral surfaces of the brush holding portions 36 and 37 in which the brushes 23 and 24 are accommodated, and are movable in the radial direction of the commutator 10, and are opposed to the outer peripheral surface of the commutator 10. The portion is in press contact with the outer peripheral surface of the commutator 10. Further, each brush 23, 24 comes into sliding contact with the segment 10 a provided on the outer peripheral surface of the commutator 10 as the commutator 10 rotates.

  In addition, one end of a linear pigtail 40 having electrical conductivity is electrically connected to a side surface 28 of each brush 23, 24 facing the upper wall 38. The pigtails 40 connected to the brushes 23 and 24 are drawn out of the brush holding portions 36 and 37 from the insertion grooves 39, respectively.

  As shown in FIG. 4, the holder body 31 includes a pair of cutouts 41 and 42 (a first cutout 41 and a second cutout) penetrating the holder body 31 from the first end E1 to the second end E2. A notch 42) is formed. The first notch 41 is formed in the holder main body 31 in the vicinity of the first brush holding portion 36. The first notch 41 is formed at a position closer to the first brush holding portion 36 than the second straight line L2 when the holder body 31 is viewed from the first end E1 side. The first notch 41 extends in parallel with the second straight line L2 from a portion of the pair of straight portions 33a and 33b that is closer to the first brush holding portion 36 than the second straight line L2 in one of the straight portions 33a. Then, after being bent at a substantially right angle toward the arc portion 33c on the first brush holding portion 36 side, it is bent again at a substantially right angle toward the other straight portion 33b, and the tip on the radially inner side of the first brush holding portion 36 It extends along the second straight line L2 to the vicinity of the part. Accordingly, the first notch 41 is open on the outer peripheral side of the brush holder 22. The position of the opening 41a of the first notch 41 in the direction of the first straight line L1 is the first position at the tip end portion (the end portion on the radially inner side) of the first brush 23 held by the first brush holding portion 36. 1 is substantially equal to the position in the direction of the straight line L1. Therefore, the opening 41a is formed at a position closer to the first brush holding portion 36 than the second straight line L2. Further, the width of the opening 41 a of the first notch 41 is formed wider than the outer diameter of the pigtail 40. Furthermore, the width of the first notch 41 (the width in the first straight line L1 direction) is formed wider than the outer diameter of the pigtail 40. Further, the first notch 41 has the first brush 23 (the first brush 23 in a state before being worn by sliding contact with the commutator 10) from the second end E2 toward the first end E1. The first cutout 41 is formed in such a size that it cannot be inserted (cannot pass through).

  The second notch 42 is formed in the holder main body 31 in the vicinity of the second brush holding portion 37. The second notch 42 is formed at a position closer to the second brush holding portion 37 than the second straight line L2 when the holder main body 31 is viewed from the first end E1 side. The second notch 42 is recessed from the portion of the pair of straight portions 33a and 33b closer to the second brush holding portion 37 than the second straight line L2 in the other straight portion 33b toward the first straight line L1. It is installed. The second notch 42 opens on the outer peripheral side of the brush holder 22. The second notch 42 extends on both sides of the opening 42a of the second notch 42, and the shape viewed from the first end E1 side is a rectangular shape that is long in the direction of the first straight line L1. The position of the opening 42a of the second notch 42 in the direction of the first straight line L1 is the first position at the distal end portion (end portion on the radially inner side) of the second brush 24 held by the second brush holding portion 37. 1 is substantially equal to the position in the direction of the straight line L1. The opening 42a of the second notch 42 is formed at a point-symmetrical position with respect to the opening 41a of the first notch 41 with the intersection O of the first straight line L1 and the second straight line L2 as the center of symmetry. Has been. Therefore, the opening 42a is formed at a position closer to the second brush holding portion 37 than the second straight line L2. Further, the width of the opening 42 a of the second notch 42 is formed wider than the outer diameter of the pigtail 40 and is formed equal to the width of the opening 41 a of the first notch 41. Furthermore, the width of the second notch 42 (the width in the direction of the second straight line L2) is formed wider than the outer diameter of the pigtail 40. The second notch 42 has the second brush 24 (the second brush 24 before being worn by sliding contact with the commutator 10) from the second end E2 toward the first end E1. The cutout 42 is formed in such a size that it cannot be inserted (cannot pass through).

  As shown in FIGS. 2 and 4, the first terminal 25 and the second terminal 26 are formed by punching a copper plate by press working and bending it with a folding machine. The first terminal 25 includes a first contact terminal portion 25a disposed on the connector forming portion 32, a first connection portion 25b disposed on the holder body 31 side, a first contact terminal portion 25a, and a first connection portion 25b. It is comprised from the 1st intermediate | middle wiring part 25c which connects between. The second terminal 26 includes a second contact terminal portion 26a disposed in the connector forming portion 32, a second connection portion 26b disposed on the holder body 31 side, a second contact terminal portion 26a, and a second connection portion. 26b, and a second intermediate wiring portion 26c that connects to 26b.

  A pair of connector forming portions 32 extending from the distal end of the connector forming portion 32 toward the base end along the outer peripheral edge of the connector forming portion 32 at the end opposite to the first end E1 of the brush holder 22. Arrangement grooves 43, 44 (first arrangement groove 43 and second arrangement groove 44) are formed. The first arrangement groove 43 and the second arrangement groove 44 are formed on both sides of the first straight line L1 when the brush holder 22 is viewed from the second end E2 side. The first arrangement groove 43 extends toward the first notch 41 along the peripheral edge of the connector forming portion 32. Further, the second arrangement groove 44 extends toward the second notch 42 along the peripheral edge portion of the connector forming portion 32. The widths of the first placement groove 43 and the second placement groove 44 are slightly wider than the plate thicknesses of the first intermediate wiring portion 25c and the second intermediate wiring portion 26c.

  As shown in FIGS. 2 and 6B, the first intermediate wiring portion 25 c of the first terminal 25 has a substantially band shape and is accommodated in the first arrangement groove 43. And the 1st terminal 25 is the brush holder 22 by the side of the 2nd end E2 by the 1st latching piece 45 formed in the connector formation part 32 in order to hold | maintain the 1st intermediate wiring part 25c in the 1st arrangement | positioning groove | channel 43. Is locked against. The first contact terminal portion 25a is axially extending from the end of the connector forming portion 32 on the first intermediate wiring portion 25c in the axial direction (the same as the direction orthogonal to the first straight line L1 and the second straight line L2). The first end E1 extends in the direction opposite to the first end E1, and protrudes from the tip of the connector forming portion 32 in the direction opposite to the first end E1. The first contact terminal portion 25a has a substantially strip shape. The first connecting portion 25 b extends from the proximal end of the connector forming portion 32 in the first intermediate wiring portion 25 c toward the straight portion 33 a and is located outside the first placement groove 43. In addition, it is formed at a position overlapping the first notch 41 when viewed from the second end E2 side (as viewed from the axial direction). The first connecting portion 25 b is formed so that the shape viewed from the axial direction (the shape viewed from the second end E <b> 2 side) is smaller than the first notch 41. The first connecting portion 25b protrudes in the opposite direction to the first contact terminal portion 25a with respect to the first intermediate wiring portion 25c, and is inserted into the first notch 41 from the second end E2 side to One notch 41 passes through and protrudes toward the first end E1. A first caulking piece 25d is formed at the tip of the first connecting portion 25b. The first caulking piece 25d is caulked together with the other end portion of the pigtail 40 whose one end portion is electrically connected to the first brush 23, and the other end portion of the pigtail 40 is sandwiched between the first connecting portions 25b. Thus, it is electrically connected to the first connection portion 25b.

  As shown in FIGS. 2 and 6C, the second intermediate wiring portion 26c of the second terminal 26 has a substantially band shape, and about half of one end side in the longitudinal direction (the upper side in FIG. 2) is the first half. 2 is accommodated in the arranging groove 44. About half of the other end side in the longitudinal direction of the second intermediate wiring portion 26 c (the lower side in FIG. 2) extends from the end of the second arrangement groove 44 on the proximal end side of the connector forming portion 32 to the second arrangement groove 44. It goes out and extends toward the straight portion 33b, then bends substantially at a right angle and extends to the second notch 42 along the first straight line L1. The second terminal 26 has a second locking piece 46 formed on the connector forming portion 32 so as to hold the end of the second intermediate wiring portion 26c on the distal end side of the connector forming portion 32 in the second arrangement groove 44. Thus, the brush holder 22 is locked on the second end E2 side. Further, the second terminal 26 engages with the holder main body 31 a portion of the second intermediate wiring portion 26c that is disposed on the second end E2 side of the holder main body 31 outside the second arrangement groove 44. It is locked to the brush holder 22 on the second end E2 side by a second locking piece 46 formed on the holder main body 31 to be stopped. The second contact terminal portion 26a is axially extending from the end of the connector forming portion 32 at the second intermediate wiring portion 26c in the axial direction (the same as the direction orthogonal to the first straight line L1 and the second straight line L2). The first end E1 extends in the direction opposite to the first end E1, and protrudes from the tip of the connector forming portion 32 in the direction opposite to the first end E1. The second contact terminal portion 26a has a substantially strip shape similar to that of the first contact terminal portion 25a, and the second contact terminal portion 26a and the first contact terminal portion 25a are the tip end portions of the connector forming portion 32. Are arranged in the direction of the second straight line L2 across the first straight line L1. Further, the second contact terminal portion 26a and the first contact terminal portion 25a extend in parallel.

  The second connection portion 26b is formed at the end portion of the second intermediate wiring portion 26c in the longitudinal direction opposite to the second contact terminal portion 26a, and is viewed from the second end portion E2 side (from the axial direction). It is formed at a position overlapping the second notch 42 (see). The second connection portion 26b is formed so that the shape seen from the axial direction (the shape seen from the second end E2 side) is smaller than the second notch 42. The second connection portion 26b protrudes in the opposite direction to the second contact terminal portion 26a with respect to the second intermediate wiring portion 26c, and is inserted into the second notch 42 from the second end portion E2 side. It penetrates through the two notches 42 and protrudes toward the first end E1. A second caulking piece 26d is formed at the tip of the second connection portion 26b. The second caulking piece 26d is caulked together with the other end portion of the pigtail 40 whose one end portion is electrically connected to the second brush 24, and the other end portion of the pigtail 40 is sandwiched between the second connection portions 26b. Thus, it is electrically connected to the second connection portion 26b.

  As shown in FIG. 1, the first contact terminal portion 25 a and the first intermediate wiring portion 25 c of the first terminal 25 are disposed at the second end E <b> 2 of the brush holder 22. And the front-end | tip part (namely, 1st crimping piece 25d) of the 1st connection part 25b penetrates the holder main body 31 in the 1st notch 41, and is arrange | positioned inside the yoke 4 (inside the cylindrical part 4a). . The first contact terminal portion 25a and the first intermediate wiring portion 25c are disposed outside the yoke 4, and the first intermediate wiring portion 25c extends radially outward. The first contact terminal portion 25a is cylindrical. It is located radially outside the portion 4a. That is, the first terminal 25 held by the brush holder 22 extends from the inside of the yoke 4 to the outside of the yoke 4. Similarly, the second contact terminal portion 26 a and the second intermediate wiring portion 26 c of the second terminal 26 are disposed at the second end E <b> 2 of the brush holder 22. And the front-end | tip part (namely, 2nd crimping piece 26d) of the 2nd connection part 26b penetrates the holder main body 31 in the 2nd notch 42, and is arrange | positioned inside the yoke 4 (inside the cylindrical part 4a). . The second contact terminal portion 26a and the second intermediate wiring portion 26c are disposed outside the yoke 4, the second intermediate wiring portion 26c extends radially outward, and the second contact terminal portion 26a is cylindrical. It is located radially outside the portion 4a. That is, the second terminal 26 held by the brush holder 22 extends from the inside of the yoke 4 to the outside of the yoke 4.

The speed reducer 3 includes a gear housing 51 connected to the yoke 4 and a speed reducing mechanism 61 accommodated in the gear housing 51.
The gear housing 51 is made of a conductive metal material such as an aluminum alloy. An accommodation recess 54 that opens to the yoke 4 side is formed at the connection end 53 that faces the opening of the yoke 4 in the gear housing 51. Further, the opening end surface 55 facing the flange portion 4c of the yoke 4 on the outer periphery of the housing recess 54 in the gear housing 51 is flat. The gear housing 51 accommodates a portion of the brush holder 22 that protrudes to the outside of the yoke 4 from the flange portion 4c in the accommodating recess 54, and the opening end surface 55 is in contact with the flange portion 4c. The flange portion 4 c and the screw 56 are connected.

  A cylindrical connector portion 57 that protrudes in the direction opposite to the yoke 4 along the axial direction is formed at the bottom of the housing recess 54 where the connector forming portion 32 is housed. The tip ends of the first contact terminal portion 25 a and the second contact terminal portion 26 a are disposed inside the connector portion 57 so as to penetrate the bottom portion of the housing recess 54. An external connector (not shown) for supplying power to the motor body 2 is inserted into the connector portion 57, and the first contact terminal portion 25a and the second contact terminal portion 26a are electrically connected to the external connector. Is done.

  The gear housing 51 is formed with a worm shaft housing recess 58 that is recessed along the axial direction from the bottom surface of the housing recess 54 in the direction opposite to the motor body 2. A worm shaft 62 in which a screw-like worm 62 a is formed at a substantially central portion in the axial direction is accommodated in the worm shaft housing recess 58 so as to be coaxial with the rotary shaft 7. Then, the proximal end portion (the right end portion in FIG. 1) of the worm shaft 62 is connected to the distal end portion of the rotating shaft 7 that penetrates the brush holder 22 and protrudes into the gear housing 51 so as to be integrally rotatable. ing. The worm shaft 62 is pivotally supported by a pair of bearings 71 and 72 arranged at both axial ends of the worm shaft housing recess 58.

  Further, the gear housing 51 is formed with a wheel housing recess 59 at a portion opposite to the connector portion 57 with respect to the worm shaft housing recess 58. The wheel housing recess 59 is connected to the worm shaft housing recess 58, and a disk-shaped worm wheel 63 is rotatably housed therein. The worm wheel 63 meshes with the worm 62 a of the worm shaft 62, and the worm wheel 63 and the worm shaft 62 constitute the speed reduction mechanism 61. Further, an output shaft 65 that rotates integrally with the worm wheel 63 is provided at the shaft center of the worm wheel 63. The speed reduction mechanism 61 decelerates the rotation transmitted from the rotary shaft 7 to the worm shaft 62 and outputs it from the output shaft 65.

  In the motor 1 configured as described above, current flows from the external connector connected to the connector portion 57 to the first terminal 25 and the second terminal 26 via the first contact terminal portion 25a and the second contact terminal portion 26a. Supplied. The current supplied to the first terminal 25 and the second terminal 26 passes through the pigtail 40, the first brush 23, and the second brush 24, and the armature coil from the commutator 10 in which the first brush 23 and the second brush 24 are in sliding contact with each other. 8 is supplied. Then, the armature 6 is rotated and the rotation of the rotation shaft 7 is transmitted from the rotation shaft 7 to the worm shaft 62. The rotation transmitted to the worm shaft 62 is decelerated by the worm shaft 62 and the worm wheel 63 and output from the output shaft 65.

Next, the manufacturing method of the brush device 21 will be described together with the operation of the brush device 21.
First, a connecting step of electrically connecting the brushes 23 and 24 and the terminals 25 and 26 via the pigtail 40 is performed. In this connection step, as shown in FIG. 6B, one end of the pigtail 40 is electrically connected to the first brush 23, while the other end of the pigtail 40 is connected to the first connection portion of the first terminal 25. 25b is electrically connected. In the present embodiment, the other end portion of the pigtail 40 is caulked with the first caulking piece 25d so that the other end portion of the pigtail 40 is sandwiched by the first caulking piece 25d of the first terminal 25. 25 is electrically connected.

  Similarly, as shown in FIG. 6C, one end of the pigtail 40 is electrically connected to the second brush 24, while the other end of the pigtail 40 is connected to the second connection portion 26 b of the second terminal 26. Connect electrically. In the present embodiment, the other end portion of the pigtail 40 is caulked with the second caulking piece 26d so as to sandwich the other end portion of the pigtail 40 with the second caulking piece 26d of the second terminal 26. 26 is electrically connected.

  Next, a terminal arrangement process for assembling the terminals 25 and 26 to the second end E2 of the brush holder 22 is performed. In the terminal arrangement step, the first terminal 25 to which the first brush 23 is connected via the pigtail 40 is connected to the brush holder 22 as shown in FIGS. 5 and 6A to 6C. It moves from the 2 end part E2 side to the attachment direction X illustrated by the arrow. The attachment direction X is one direction in the thickness direction of the holder main body 31, and is a direction approaching the brush holder 22 in parallel with the third straight line L3 orthogonal to the first straight line L1 and the second straight line L2. The first terminal 25 moved in the attachment direction X has the thickness direction of the first intermediate wiring portion 25c parallel to the second straight line L2, and the first intermediate wiring portion 25c is connected to the first placement groove 43. Furthermore, the first connecting portion 25b faces the first notch 41. Then, the first intermediate wiring portion 25 c is inserted into the first placement groove 43 while the first terminal 25 is moved in the mounting direction X and the first connection portion 25 b is inserted into the first notch 41. When inserting the first connection portion 25 b into the first cutout 41, the pigtail 40 is passed through the opening 41 a of the first cutout 41 so that the first brush 23 passes through the outer periphery of the brush holder 22. Accordingly, the pigtail 40 is pulled out from the opening 41 a of the first notch 41 to the outer periphery of the brush holder 22 and the first brush 23 is disposed on the outer periphery of the brush holder 22. The first connecting portion 25b is inserted through the first notch 41 toward the portion E1. Accordingly, the first brush 23 is moved from the second end E2 side to the first end E1 side without penetrating the brush holder 22. The first terminal 25 in which the first intermediate wiring portion 25 c is arranged in the first arrangement groove 43 is fixed to the brush holder 22 by the first locking piece 45. Further, the tip end portion (first caulking piece 25 d) of the first connection portion 25 b assembled to the brush holder 22 is positioned on the first end E 1 side with respect to the brush holder 22.

  Further, the second terminal 26 to which the second brush 24 is connected via the pigtail 40 is moved in the mounting direction X from the second end E2 side with respect to the brush holder 22. The second terminal 26 moved in the mounting direction X has the tip of the second contact terminal portion 26a facing away from the connector forming portion 32 and the longitudinal direction of the second intermediate wiring portion 26c is the first straight line L1. They are parallel. Further, in the second terminal 26, about half of the second intermediate wiring portion 26c on the second contact terminal portion 26a side faces the second arrangement groove 44, and the second connection portion 26b has a second notch 42. Is facing. Then, the second terminal 26 is moved in the mounting direction X, and the second intermediate wiring portion 26 c is inserted into the second placement groove 44 while the second connection portion 26 b is inserted into the second notch 42. When inserting the second connecting portion 26 b into the second notch 42, the pigtail 40 is passed through the opening 42 a of the second notch 42 so that the second brush 24 passes through the outer periphery of the brush holder 22. Accordingly, the pigtail 40 is pulled out from the opening 42 a of the second notch 42 to the outer periphery of the brush holder 22 and the second brush 24 is disposed on the outer periphery of the brush holder 22. The second connecting portion 26b is inserted through the second notch 42 toward the portion E1. Therefore, the second brush 24 is moved from the second end E2 side of the holder body 31 to the first end E1 side without penetrating the brush holder 22. The second terminal 26 in which the second intermediate wiring portion 26 c is disposed in the second arrangement groove 44 is fixed to the brush holder 22 by the second locking piece 46. Further, the tip end portion (second caulking piece 26 d) of the second connection portion 26 b assembled to the brush holder 22 is positioned on the first end E1 side with respect to the brush holder 22.

  Next, a brush placement process for placing the brushes 23 and 24 on the first end E1 of the brush holder 22 is performed. As shown in FIGS. 4 and 6A, in the brush placement step, the first brush 23 placed on the outer periphery of the brush holder 22 is moved toward the first end E <b> 1 of the brush holder 22. Then, the first brush 23 is inserted into the first brush holder 36 while the pigtail 40 is inserted into the insertion groove 39 from the radially outer end of the first brush holder 36. Similarly, the second brush 24 disposed on the outer periphery of the brush holder 22 is moved toward the first end E1 of the brush holder 22. Then, the second brush 24 is inserted into the second brush holding portion 37 while inserting the pigtail 40 into the insertion groove 39 from the radially outer end of the second brush holding portion 37. Thus, the brush device 21 is completed.

As described above, the present embodiment has the following effects.
(1) While connecting the 1st brush 23 to the 1st connection part 25b of the 1st terminal 25 via the pigtail 40, inserting the 1st connection part 25b into the 1st notch 41 from the 2nd end E2 side The first terminal 25 can be disposed at the second end E2. Similarly, after connecting the second brush 24 to the second connection portion 26b of the second terminal 26 via the pigtail 40, the second connection portion 26b is inserted into the second cutout 42 from the second end E2 side. The second terminal 26 can be disposed at the second end E2. The first notch 41 and the second notch 42 are open to the outer peripheral side of the brush holder 22. Therefore, when the connection portions 25b and 26b are inserted into the notches 41 and 42, the end of the pigtail 40 on the side where the brushes 23 and 24 are connected is connected to the brush holder 22 from the openings 41a and 42a of the notches 41 and 42. The brushes 23 and 24 can be arranged on the outer periphery of the brush holder 22 by being pulled out to the outer periphery of the brush holder 22, respectively. Then, by moving the brushes 23 and 24 from the outer peripheral side of the brush holder 22 toward the first end E1, the brushes 23 and 24 can be easily arranged at the first end E1. Therefore, the pigtail 40 can be connected to the connecting portions 25b and 26b of the terminals 25 and 26 before the terminals 25 and 26 are arranged on the brush holder 22, respectively. Therefore, since the pigtail 40 can be connected to the connection portions 25b and 26b of the terminals 25 and 26 without being affected by the positional deviation of the terminals 25 and 26 with respect to the brush holder 22, respectively, the pigtail 40 and the terminals 25 and 26 can be connected to each other. Connection can be made easily. Moreover, since it is not necessary to insert-mold the terminals 25 and 26 in the brush holder 22, the brush holder 22 can be manufactured cheaply. And the manufacturing cost of the brush apparatus 21 can be reduced by having provided the brush holder 22 manufactured cheaply.

  (2) The first notch 41 allows the first connecting portion 25b and the pigtail 40 connected to the first connecting portion 25b to be inserted from the second end E2 side to the first end E1 side, The size of the one brush 23 cannot be inserted from the second end E2 side to the first end E1 side. Similarly, the second notch 42 allows the second connecting portion 26b and the pigtail 40 connected to the second connecting portion 26b to be inserted from the second end E2 side to the first end E1 side, The size of the two brushes 24 cannot be inserted from the second end E2 side to the first end E1 side. Accordingly, the ends of the pigtail 40 on the side to which the brushes 23 and 24 are connected are pulled out from the openings 41a and 42a of the notches 41 and 42 to the outer periphery of the brush holder 22 while keeping the size of the notches 41 and 42 small. Thus, the brushes 23 and 24 can be disposed on the outer periphery of the brush holder 22. And by suppressing the magnitude | size of the notches 41 and 42 small, while the fall of the intensity | strength of the brush holder 22 can be suppressed, the freedom degree of the position which provides the notches 41 and 42 in the brush holder 22 increases.

(3) By providing the brush device 21 with a reduced manufacturing cost, the manufacturing cost of the motor 1 can be reduced.
(4) In the connection process, since the terminals 25 and 26 are not arranged with respect to the brush holder 22, the connection portions 25b of the terminals 25 and 26 are not affected by the positional deviation of the terminals 25 and 26 with respect to the brush holder 22. A pigtail 40 can be connected to each 26b. Therefore, the pigtail 40 and the terminals 25 and 26 can be easily connected. In the terminal arrangement process, when the terminals 25 and 26 are arranged at the second end E2 while the connection parts 25b and 26b are inserted into the notches 41 and 42, respectively, the brushes 23 and 24 move the outer periphery of the brush holder 22 around. By passing the pigtail 40 through the openings 41a and 42a of the cutouts 41 and 42 so as to pass through, even the terminals 25 and 26 to which the brushes 23 and 24 are connected via the pigtail 40 can be easily used. Can be arranged. Furthermore, even if the terminals 25 and 26 are not embedded by insert molding, the connection portions 25b and 26b can be protruded toward the first end E1. In the brush arranging step, the brushes 23 and 24 arranged on the outer periphery of the brush holder 22 in the terminal arranging step are moved toward the first end E1 so that the brushes 23 and 24 can be easily moved to the first end E1. Can be arranged.

  (5) The pair of brush holding portions 36 and 37 are formed on the first straight line L1 on both sides of the second straight line L2 at the first end E1 of the brush holder 22, respectively. And the opening 41a of the 1st notch 41 is formed in the position near the 1st brush holding | maintenance part 36 rather than the 2nd straight line L2, when the holder main body 31 is seen from the 1st end part E1 side. Similarly, the opening 42a of the second notch 42 is formed at a position closer to the second brush holding portion 37 than the second straight line L2 when the holder main body 31 is viewed from the first end E1 side. . Accordingly, the first connecting portion 25b through which the first notch 41 is inserted and the first brush holding portion 36 that holds the first brush 23 can be positioned closer to each other. It can suppress that the length of the pigtail 40 which connects 1 brush 23 becomes long. Similarly, since the second connecting portion 26b through which the second notch 42 is inserted and the second brush holding portion 37 holding the second brush 24 can be positioned closer to each other, the second connecting portion 26b It can suppress that the length of the pigtail 40 which connects the 2nd brush 24 becomes long.

In addition, you may change embodiment of this invention as follows.
-The 1st notch 41 and the 2nd notch 42 do not necessarily need to be formed in the place of the said embodiment in the brush holder 22, if it is formed so that it may open to the outer peripheral side of the brush holder 22. FIG. For example, the first cutout 41 and the second cutout 42 may be formed such that the opening 41a of the first cutout 41 and the opening 42a of the second cutout 42 are located on the second straight line L2.

  -The shape and magnitude | size of the 1st notch 41 and the 2nd notch 42 are not restricted to the shape and magnitude | size of the said embodiment. For example, the first cutout 41 and the second cutout 42 allow the brushes 23 and 24 to be inserted through the first cutout 41 and the second cutout 42 from the second end E2 side to the first end E1 side. Any size may be used.

  In the above embodiment, the pigtail 40 is electrically connected to the connecting portions 25b and 26b by caulking the caulking pieces 25d and 26d. However, the method of electrically connecting the pigtail 40 to the connecting portions 25b and 26b is not limited to this, and welding, soldering, or the like may be used. Moreover, you may electrically connect the pigtail 40 to the connection parts 25b and 26b using the terminal piece for a connection.

  In the above embodiment, the brush device 21 includes a pair of brushes 23 and 24. However, the number of power supply brushes provided in the brush device 21 may be three or more. In this case, a brush holding portion is formed in the brush holder 22 according to the number of brushes, and a notch that opens to the outer peripheral side of the brush holder 22 is also formed in the brush holder 22 according to the number of brushes. Further, the number of terminals 25 and 26 provided in the brush device 21 is not two, but may be three or more.

  DESCRIPTION OF SYMBOLS 3 ... Reduction gear, 4 ... Yoke housing, 4b ... Opening part, 6 ... Armature, 10 ... Commutator, 21 ... Brush apparatus, 22 ... Brush holder, 23 ... 1st brush as brush, 24 ... 1st brush as brush 2 brushes, 25 ... 1st terminal as a terminal, 25b ... 1st connection part as a connection part, 26 ... 2nd terminal as a terminal, 26b ... 2nd connection part as a connection part, 36 ... As brush holding part First brush holding part 37 ... second brush holding part as brush holding part, 40 ... pigtail, 41 ... first notch as notch, 41a ... opening, 42 ... second notch as notch, 42a ... opening, E1 ... first end, E2 ... second end.

Claims (5)

  A first end for holding a brush for supplying power to the armature; and a second end for holding a terminal provided on the opposite side of the first end and electrically connected to the brush via a pigtail; A brush holder comprising: a notch penetrating from the first end portion to the second end portion and opening to an outer peripheral side and through which a connecting portion to which the pigtail in the terminal is connected is inserted. A brush holder according to claim 1;
A brush held by the brush holder at the first end;
A terminal held by the brush holder at the second end and the connection portion is inserted into the notch from the second end side to the first end side; and
A brush device comprising: a pigtail having one end portion electrically connected to the brush and the other end portion electrically connected to the connection portion. The brush device according to claim 2,
The notch allows the connection portion and the pigtail connected to the connection portion to be inserted from the second end portion side to the first end portion side, while the brush extends from the second end portion side. A brush device characterized in that it is of a size that cannot be inserted into the first end side. A bottomed cylindrical yoke housing;
An armature rotatably disposed inside the yoke housing and having a commutator;
The brush holder is fitted into the opening of the yoke housing so that the first end is on the inner side of the yoke housing and the second end is on the outer side of the yoke housing, and the terminal is the yoke housing. The brush device according to claim 2 or 3, wherein the brush device is slidably contacted with the commutator, and extends to the outside of the brush.
A motor comprising: a reduction gear connected to the opening of the yoke housing and decelerating and outputting the rotation of the armature. In the manufacturing method of the brush apparatus of Claim 2 or Claim 3,
A connection step of electrically connecting one end of the pigtail to the brush and electrically connecting the other end of the pigtail to the connection;
After the connecting step, passing the pigtail through the opening facing the outer peripheral side of the brush holder in the notch so that the brush passes through the outer periphery of the brush holder, and from the second end side to the first end A terminal disposing step of inserting the connecting portion through the notch toward the portion and disposing the terminal at the second end;
A brush arrangement manufacturing method comprising: a brush arrangement step of arranging the brush at the first end portion after the terminal arrangement step.