JP2014011809A - Brush holder device and motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brush holder device which suppresses increase in size in a radial direction and a plate-thickness direction thereof and that have an efficient arrangement structure allowing for connecting a pair of the brushes with each other.SOLUTION: A brush holder device 30 has a first wire 128 and a second wire 130 housed in a groove part 120 and a base plate 50 formed by an insulating material. As the first wire 128 and the second wire 130 are housed in the base plate 50, increase in size in a radial direction and a plate-thickness direction of the brush holder device 30 can be suppressed. In addition, a part of the groove part 120 is blocked by rubber bushes 84, 86. With this configuration, it is not necessary to separately provide a member to prevent the come-off of the second wire 130 from the groove part 120 by setting a position of the groove part 120 so that a part of the groove part 120 is blocked by the rubber bushes 84, 86. As a result, the brush holder device 30 can be made into an efficient arrangement structure so as to arrange the first wire 128 and the second wire 130.

Description

  The present invention relates to a brush holder device and a motor.

  Patent Document 1 below discloses a so-called four-pole wiper motor used in an automobile wiper device. This wiper motor includes a high-speed brush, a low-speed brush, and a common brush that is commonly used for low-speed and high-speed to correspond to a high-speed mode that operates the wiper at high speed and a low-speed mode that operates the wiper at low speed. Have. In addition, the number of brushes is doubled from 3 to 6 by changing the field magnetic pole from 2 poles to 4 poles. In order to prevent this, the armature (armature) faces the equipotential. The power coils are connected by equalizing wires to prevent the number of brushes from increasing.

JP 2006-353019 A Japanese National Patent Publication No. 10-503640

  However, since an equalizing line is used in the armature, the equalizing line must be routed to the armature while being connected to a plurality of commutator pieces in addition to the rotor winding of the armature. The winding process and the connection process become complicated. Therefore, although the number of brushes increases, there is a four-pole wiper motor that can operate the wiper in a high speed mode and a low speed mode without using a pressure equalizing line (see, for example, Patent Document 2). In this four-pole wiper motor, a pair of high-speed brushes, a pair of low-speed brushes, and a pair of common brushes arranged opposite to each other of the brush holder device are electrically connected to each other so that each pair of brushes is connected to each other. Wired in parallel.

  For this reason, when connecting a pair of high-speed brushes, a pair of low-speed brushes, and a pair of common brushes by a connecting member, etc., the connecting member and other members disposed in the brush holder device It is desirable to make the brush holder device an efficient arrangement structure in consideration of the positional relationship. In this case, it is desirable to arrange the connecting member in the brush holder device while suppressing the increase in the radial direction and the plate thickness direction of the brush holder device.

  In view of the above facts, the present invention has an object to provide a brush holder device capable of connecting a pair of brushes with an efficient arrangement structure while suppressing an increase in the radial direction and the thickness direction of the brush holder device. And

  The brush holder device according to claim 1 is supported by a support main body part that constitutes a part of a motor via a support member, and is made of an insulating material, and is formed in an annular shape, and a plate of the base plate A first connecting member that connects the first brushes that form a pair provided on one side in the thickness direction and a second connecting member that connects the second brushes that form a pair provided on one side in the plate thickness direction of the base plate. And formed on the base plate, opened to one side in the plate thickness direction of the base plate, the first connection member and the second connection member are accommodated therein, and a part thereof is blocked by the support member A groove portion.

  According to the brush holder device of the first aspect, the base plate formed in an annular shape is supported by the support main body via the support member. A pair of first brushes and a pair of second brushes are provided on one side of the base plate in the thickness direction. And the 1st brush used as a pair is connected by the 1st connection member, and the 2nd brush used as a pair is connected by the 2nd connection member.

  Here, the first connection member and the second connection member are accommodated in a groove formed in the base plate, and the base plate is formed of an insulating material. For this reason, the first connecting member and the second connecting member are disposed in the base plate in an electrically insulated state. Thereby, since the protrusion from the base plate of a 1st connection member and a 2nd connection member is suppressed, even if a 1st connection member and a 2nd connection member are provided in a brush holder apparatus, the radial direction and plate | board thickness of a brush holder apparatus Increase in direction can be suppressed.

  Moreover, a part of the groove is closed by the support member. Accordingly, the support member suppresses the first connection member or the second connection member from coming out of the groove portion, and the first connection member or the second connection member is held in the groove portion. That is, it is necessary to separately provide a member for suppressing the first connecting member or the second connecting member from coming out of the groove portion by setting the position of the groove portion and the supporting member so that a part of the groove portion is blocked by the supporting member Disappears. Therefore, it is possible to arrange the first connection member and the second connection member with an efficient arrangement structure of the brush holder device.

  By the above, the 1st brush and 2nd brush which are paired with an efficient arrangement structure can be connected, suppressing the enlargement of the radial direction of a brush holder device, and a board thickness direction.

  The brush holder device according to claim 2 is the brush holder device according to claim 1, wherein each of the first brush and the second brush is alternately arranged in a circumferential direction of the base plate, and the support member is It arrange | positions between the said 1st brush and the said 2nd brush.

  According to the brush holder device of the second aspect, the first brush and the second brush are alternately arranged in the circumferential direction of the base plate, and the support member is between the first brush and the second brush. Since they are arranged, the first brush, the support member, and the second brush are arranged side by side in the circumferential direction of the base plate. Thereby, compared with the case where a support member is arrange | positioned to the radial direction outer side of a base plate rather than a 1st brush or a 2nd brush, the enlargement in the radial direction of a base plate can be suppressed, for example.

  The brush holder device according to claim 3 is the brush holder device according to claim 1 or 2, wherein the base plate is formed with a fitted portion into which the support member is fitted, and the support member. Is configured to include a cylindrical portion fitted to the fitted portion and a flange portion formed at both axial end portions of the cylindrical portion, with the plate thickness direction of the base plate being the axial direction, A part of the groove is closed by the flange.

  According to the brush holder device of the third aspect, the support member is configured to include the cylindrical portion and the flange portion. The tube portion is fitted to the fitted portion of the base plate with the plate thickness direction of the base plate as the axial direction. Further, the flange portion is formed on both end portions in the axial direction of the cylindrical portion, that is, on both side surfaces in the plate thickness direction of the base plate, whereby the support member is assembled (held) to the base plate. Here, a part of the groove is closed by the flange. As a result, the flange portion for holding the support member on the base plate can be used to prevent the first connection member or the second connection member from coming out of the groove portion. Therefore, the brush holder device can be arranged more efficiently.

  A motor according to a fourth aspect includes the brush holder device according to any one of the first to third aspects.

  According to the motor of the fourth aspect, since the brush holder device according to any one of the first to third aspects is provided, the increase in the radial and axial size of the motor is suppressed. 1 brush and 2nd brush can be connected.

  According to a fifth aspect of the present invention, in the motor according to the fourth aspect, the motor is a first housing formed in a cylindrical shape, and is fixed to the opening of the first housing to be closed, and the support body. A four-pole permanent magnet having different magnetic poles alternately in the circumferential direction of the first housing, and a pair of the first housings. Each of the brush and the pair of second brushes is disposed to oppose the radial direction of the base plate.

  According to the motor of the fifth aspect, the motor is configured as a so-called four-pole motor, and the pair of first brushes and the pair of second brushes are connected by the first connection member and the second connection member. . For this reason, the enlargement of the radial direction and the axial direction of the motor can be suppressed while adopting a simple armature winding structure that does not use a pressure equalizing wire.

It is a front view which shows the brush holder apparatus which concerns on embodiment of this invention. It is a perspective view of the brush holder apparatus shown by FIG. It is the perspective view which fractured | ruptured the brush holder apparatus shown by FIG. 1 in the 3-3 line position of FIG. (A) is the perspective view which fractured | ruptured the brush holder apparatus shown by FIG. 1 in the 4A-4A line position of FIG. 1, (B) is the brush holder apparatus shown by FIG. 1 4B-4B of FIG. It is the perspective view fractured | ruptured at the line position. (A) is the perspective view which fractured | ruptured the brush holder apparatus shown by FIG. 1 in the 5A-5A line position of FIG. 1, (B) is the brush holder apparatus shown by FIG. 1 5B-5B of FIG. It is the perspective view fractured | ruptured at the line position. (A) is the perspective view which fractured | ruptured the brush holder apparatus shown by FIG. 1 in the 6A-6A line position of FIG. 1, (B) is the brush holder apparatus shown by FIG. 1 6B-6B of FIG. It is the perspective view fractured | ruptured at the line position. It is a top view of the motor with which the brush holder apparatus shown by FIG. 1 was used. FIG. 8 is a cross-sectional view (a cross-sectional view taken along line 8-8 in FIG. 7) in which the motor shown in FIG. 7 is partially broken.

  Hereinafter, a motor (wiper motor) 10 using a brush holder device 30 according to an embodiment of the present invention will be described with reference to the drawings, and then the brush holder device 30 will be described.

(About motor 10)

  FIG. 7 shows the motor 10 in a plan view, and FIG. 8 shows a cross-sectional view in which the motor 10 is partially broken. As shown in these drawings, the motor 10 includes a motor main body 12 and a speed reduction unit 32 and is configured as a drive source for a vehicle wiper device (not shown).

  The motor body 12 includes a substantially bottomed cylindrical motor housing 14 as a first housing. As shown in FIG. 8, two pairs of permanent magnets 16 are fixed to the inner peripheral surface of the motor housing 14, and the permanent magnets 16 have different magnetic poles alternately along the circumferential direction of the motor housing 14. Are arranged at equal intervals (every 90 °) (a pair of opposed permanent magnets have the same magnetic pole and are arranged to have a different magnetic pole from the adjacent pair of permanent magnets). That is, the motor body 12 is configured as a four-pole motor.

  In the motor housing 14, an armature 18 is accommodated inside the permanent magnet 16, and the armature 18 includes a rotary shaft 20, an armature core 24, an armature coil 26, and a commutator 28. ing. The rotary shaft 20 is formed in a substantially round bar shape and is arranged coaxially with the motor housing 14. Then, one end portion in the axial direction of the rotating shaft 20 (the end portion on the arrow A direction in FIG. 8) is rotatably supported on the bottom portion of the motor housing 14 via a substantially cylindrical bearing 22. The other axial end portion (the end portion in the direction of arrow B in FIG. 8) of the rotary shaft 20 is disposed in a gear housing 34 as a second housing described later and is rotatably supported by the gear housing 34. . Further, a worm portion (not shown) is integrally formed at a portion on the other axial end side of the rotating shaft 20, and a worm gear is formed on the outer periphery of the worm portion.

  The armature core 24 is fixed to the rotary shaft 20 and is disposed in the motor housing 14. The armature core 24 is formed by laminating a plurality of plate-shaped iron core plates having a plurality of teeth. The armature core 24 has a plurality of slots (18 slots in this example) at equiangular intervals, and the winding is sequentially performed in multiple turns for every predetermined slot (every 4 slots in this example) of the armature core 24. Thus, the armature coil 26 is formed. Further, the rotary shaft 20 on the side opposite to the bearing 22 of the armature core 24 (the arrow B direction side in FIG. 8) has a plurality of commutator pieces 29 (in this example, the number of slots) arranged concentrically on the outer peripheral surface. A commutator 28 having the same 18) is fixed by press-fitting. Each commutator piece 29 of the commutator 28 is fixed by electrically insulating commutator pieces adjacent to each other in the circumferential direction, and corresponding windings wound for each predetermined slot of the armature coil 26 are sequentially provided. The commutator piece 29 is electrically connected. It should be noted that the armature 18 is not provided with a pressure equalizing line that connects commutator pieces that are equipotential.

  A holder housing portion 36 formed integrally with a gear housing 34 as a second housing described later is fixed to the opening of the motor housing 14. The holder accommodating portion 36 has a substantially bottomed cylindrical shape in which one axial side of the rotating shaft 20 (arrow A direction side in FIG. 8) is opened, and closes the opening of the motor housing 14. An insertion hole 36A is formed in the bottom wall of the holder accommodating portion 36, and the rotary shaft 20 is inserted into the insertion hole 36A. A brush holder device 30 having a substantially annular shape is accommodated and supported in the holder accommodating portion 36. The brush holder device 30 is disposed on the radially outer side of the rotary shaft 20 with respect to the commutator 28, and the pair of first brushes 100 and 102 (see FIG. 1) and the pair of second brushes 104 of the brush holder device 30. , 106 (see FIG. 1) are slidably contacted with the commutator 28 by a biasing force of a torsion spring 82 described later.

  On the other hand, the speed reduction part 32 includes a gear housing 34 as a second housing made of aluminum (or aluminum alloy). The gear housing 34 is formed in a substantially rectangular parallelepiped box shape with a part opened, and is disposed on the other axial side of the rotating shaft 20 (the arrow B direction side in FIG. 8) than the motor housing 14. In the gear housing 34, the worm portion of the rotary shaft 20 described above is disposed. In addition, a substantially disc-shaped worm wheel 38 (see FIG. 7) is accommodated in the gear housing 34 at the side of the worm portion, and the worm wheel 38 is orthogonal to the rotating shaft 20 of the motor body 12. The direction of rotation (the direction of arrow C in FIG. 8) is axially supported so as to be rotatable. The outer peripheral portion of the worm wheel 38 is engaged with the worm portion of the rotary shaft 20. A substantially cylindrical output shaft 40 is provided at the axial center of the worm wheel 38, and the output shaft 40 extends from the worm wheel 38 to one side in the axial direction of the worm wheel 38 (the arrow C direction side in FIG. 7). It protrudes and is drivingly connected to a pivot shaft (not shown) constituting a vehicle wiper device via a link mechanism or the like.

  Furthermore, a cover plate 42 made of an insulating resin material is provided on the opening side of the gear housing 34. The cover plate 42 is formed in a substantially rectangular parallelepiped box opened to the gear housing 34 side, and closes the opening of the gear housing 34. In the cover plate 42, a circuit board 44 constituting a circuit for driving and controlling the rotation of the motor body 12 is disposed. The circuit board 44 is connected to the motor body 12, specifically, first and second terminals 64 and 66 as motor terminals connected to the first and second brushes of each pair, and a connector 46 to which an external connector is connected. (Refer to FIG. 7). Further, the circuit board 44 includes a PWM control circuit (not shown) for controlling the rotation speed of the motor body 12 by PWM control. Further, the circuit board 44 is supplied with the drive current of the motor main body 12 and the electric signal such as the sensor signal and the command signal from the external connector via the connector 46, and the drive control of the motor main body 12 according to the electric signal is performed. This is performed in the circuit of the circuit board 44. By performing drive control such as rotation speed and rotation direction of the motor body 12 and start / stop control, the wiper device of the vehicle is wiped and controlled. The reversing operation of the wiper device is executed by rotating the rotation direction of the rotation shaft 20 of the motor body 12 (that is, the rotation direction of the output shaft 40) forward and backward.

(About the brush holder device 30)

  1 is a front view of the brush holder device 30 viewed from one axial side of the rotary shaft 20 (the arrow A direction side in FIG. 8), and FIG. 2 is a perspective view of the brush holder device 30. It is shown in the figure.

  As shown in these drawings, the brush holder device 30 includes a base plate 50, four brush holders 88, a pair of first brushes 100 and 102, a pair of second brushes 104 and 106, and a first connection. The first wire 128 (see FIG. 1) as a member and the second wire 130 (see FIG. 1) as a second connecting member are configured. As shown in FIGS. 1 and 3, a groove 120 is formed in the base plate 50, and the first wire 128 and the second wire 130 are held in the groove 120. In addition, the 1st wire 128 and the 2nd wire 130 are comprised by the linear lead wire which has flexibility and a certain amount of rigidity (shape stability). Hereinafter, each configuration will be described.

  The base plate 50 is made of an insulating material (resin). As shown in FIG. 1, the base plate 50 has a substantially annular plate-like base portion 52 having a through hole 54 in the axial center. The base portion 52 is disposed coaxially with the rotary shaft 20, and the commutator 28 (see FIG. 8) described above is disposed in the through hole 54.

  Assembling grooves 56 and 58 as a pair of fitted parts for assembling rubber bushes 84 and 86 to be described later are formed on the outer peripheral portion of the base portion 52 (see FIG. 1). , 58 are formed in a substantially inverted C shape opened to the outside in the radial direction of the base portion 52 when viewed from one side in the plate thickness direction of the base portion 52 (the arrow A direction side in FIG. 2).

  Rubber bushes 84 and 86 as substantially cylindrical support members are mounted in the assembly grooves 56 and 58, respectively. The rubber bushes 84 and 86 have cylindrical cylindrical portions 84A and 86A, respectively, and the cylindrical portions 84A and 86A are fitted in the assembly grooves 56 and 58 with the plate thickness direction of the base portion 52 as the axial direction. Are combined. In addition, a pair of flange portions 84B and 86B are integrally formed on the outer peripheral portions of the rubber bushes 84 and 86 at both axial ends, that is, on both side surfaces in the plate thickness direction of the base plate 50, respectively. The flange portions 84B and 86B are formed in a substantially annular shape and project outward in the radial direction of the rubber bushes 84 and 86. The base portion 52 is sandwiched between the flange portions 84B and 86B, whereby the rubber bushes 84 and 86 are assembled to the base portion 52 in a floating support state. Screws (not shown) are inserted into the rubber bushes 84 and 86, and the base portion 52 (brush holder device 30) is housed and fixed in the holder housing portion 36 of the gear housing 34 by the screws. Thereby, the brush holder apparatus 30 is being fixed to the gear housing 34 as a 2nd housing.

  The base portion 52 accommodates a pair of choke coils (not shown) for suppressing electric noise of the motor body 12 at a position opposite to the mounting grooves 56 and 58 with respect to the through hole 54. Coil accommodating portions 60A and 60B are formed. As shown in FIG. 2, the base portion 52 is integrally formed with a pair of terminal mounting portions 62 at the positions of the coil housing portions 60 </ b> A and 60 </ b> B. It protrudes from the thickness direction other side (arrow B direction of FIG. 2) of the base part 52 from. A first terminal 64 and a second terminal 66 as motor terminals of the motor body 12 are assembled to the terminal mounting portion 62, respectively. The first terminal 64 and the second terminal 66 are electrically connected to the circuit board 44. Connected.

  The base portion 52 is provided with a first connection fitting 68 on the side of the coil housing portion 60A. The first connection fitting 68 is electrically connected to the first terminal 64 via a choke coil. Yes. Further, the base portion 52 is provided with a second connection fitting 70 on the side of the coil housing portion 60B. The second connection fitting 70 is electrically connected to the second terminal 66 via a choke coil. Yes.

  In addition, four support shafts 72 for supporting a torsion spring 82 described later are formed in the base portion 52 in the vicinity of each brush holder 88 described later. The support shaft 72 is formed in a substantially cylindrical shape and protrudes from the base portion 52 to one side in the plate thickness direction of the base portion 52.

  Further, locking pieces 74 are formed on the outer peripheral portion of the base portion 52 at positions radially outside the base portion 52 with respect to the respective support shafts 72. The locking piece 74 is formed in a substantially plate shape, protrudes from the base portion 52 to one side in the plate thickness direction of the base portion 52, and on the outer periphery of the support shaft 72 when viewed from the plate thickness direction of the base portion 52. Is curved along. A protruding portion 74A is integrally formed at the tip of the locking piece 74, and the protruding portion 74A is one side in the circumferential direction of the base portion 52 from the locking piece 74 (the direction of arrow E in FIGS. 1 and 2). It is protruded to.

  Further, as shown in FIG. 3, guide pillars 76 are formed on the inner peripheral portion of the base portion 52 at positions radially inside the base portion 52 with respect to the respective support shafts 72. The guide column 76 is formed in a substantially pentagonal cross section and protrudes from the base portion 52 to one side (brush arrangement side) of the base portion 52 in the plate thickness direction.

  As shown in FIG. 2, a torsion spring 82 is supported on each support shaft 72 of the base portion 52. One end portion of each torsion spring 82 is disposed between the protrusion 74A of the locking piece 74 and the base portion 52 and locked to the locking piece 74, and the other end portion of each torsion spring 82 is described later. The first brush 100 and 102 and the second brush 104 and 106 are locked.

  The brush holder 88 is made of a conductive sheet metal and is formed in a substantially rectangular tube shape with a partially opened side wall. The brush holder 88 is disposed on one side surface (the surface on the arrow A direction side in FIG. 2) with the longitudinal direction being the radial direction of the base portion 52. The brush holder 88 is disposed on one side of the base portion 52 in the circumferential direction (clockwise side in FIG. 1) with respect to the support shaft 72, and is equiangularly spaced (every 90 °) in the circumferential direction of the base portion 52. Is arranged. Further, one of the four brush holders 88 is disposed between the rubber bush 84 and the rubber bush 86 described above.

  As shown in FIGS. 3 and 6, a pair of fixing claws 90 (elements grasped as a fixed portion in a broad sense) are integrally formed on the bottom wall of the brush holder 88 at both ends in the longitudinal direction. Is formed. The fixing claws 90 extend from the bottom wall of the brush holder 88 to the base portion 52 side, and are bent in directions opposite to each other on the other side surface (the surface on the arrow B direction side in FIG. 2) of the base portion 52. The base portion 52 is held between the pair of fixing claws 90, and thereby the brush holder 88 is fixed to the base portion 52.

  A non-interference hole 92 (refer to the brush holder 88 disposed on the right side of FIG. 2) passes through the side wall 88A of the brush holder 88 (a side wall disposed on one side in the circumferential direction of the base portion 52) at a substantially central portion. Is formed. The non-interference hole 92 is formed in a long hole shape along the longitudinal direction of the brush holder 88 (the radial direction of the rotating shaft 20). A non-interference groove 94 is formed on the side wall 88B of the brush holder 88 (side wall facing the side wall 88A). The non-interference groove 94 is formed along the longitudinal direction of the brush holder 88 (the radial direction of the rotating shaft 20), and is opened to one side of the brush holder 88 in the longitudinal direction (the radially outer side of the base portion 52). Yes. Further, an insertion groove 96 is formed in the upper wall of the brush holder 88 (the wall facing the bottom wall of the brush holder 88). The insertion groove 96 is formed along the longitudinal direction of the brush holder 88 (the radial direction of the rotating shaft 20), and is open to one side of the brush holder 88 in the longitudinal direction.

  Further, a notch 98 is formed in the opening on the through hole 54 side of the brush holder 88. The notch 98 extends from the intermediate portion in the width direction of the bottom wall of the brush holder 88 to the intermediate portion in the height direction of the side wall 88B (the plate thickness direction of the base portion 52), and is open to the through hole 54 side. A guide column 76 is disposed in the notch 98.

  As shown in FIGS. 1 and 2, the pair of first brushes 100 and 102 and the pair of second brushes 104 and 106 are formed in a substantially rectangular parallelepiped shape and are accommodated in a brush holder 88. The first brushes 100 and 102 and the paired second brushes 104 and 106 are arranged to face each other in the radial direction of the base portion 52 (at a mechanical angle of 180 degrees). In addition, a rubber bush 84 is disposed between the first brush 102 and the second brush 106, and a rubber bush 86 is disposed between the first brush 102 and the second brush 104. Further, the first brushes 100 and 102 and the second brushes 104 and 106 are inserted into the brush holder 88 so as to be slidable in the longitudinal direction of the brush holder 88.

  As shown in FIG. 1, the first brushes 100 and 102 and the second brushes 104 and 106 have a predetermined length in the radial direction from the contact side end with the commutator 28 in a portion facing the side wall 88 </ b> B of the brush holder 88. Step portions 100A to 106A are formed over the entire area. The step portions 100A to 106A are viewed from the plate thickness direction of the base portion 52, and are the other ends in the longitudinal direction of the first brush 100, 102 and the second brush 104, 106 (the radially inner end of the base portion 52). The width dimension is set to be smaller than the width dimension of one end portion in the longitudinal direction of the first brush 100, 102 and the second brush 104, 106 (the radially outer end portion of the base portion 52). Moreover, the step portions 100 </ b> A to 106 </ b> A (sliding contact width in the circumferential direction with the commutator 28) of the first brush 100 and 102 and the second brush 104 and 106 are smaller than the circumferential width of the commutator piece 29. The width dimension is set. The step portions 100A to 106A of the first brushes 100 and 102 and the second brushes 104 and 106 are all of the same size.

  The other end of the torsion spring 82 is locked to one end in the longitudinal direction of the first brush 100, 102 and the second brush 104, 106, and the first brush 100, 102, and The second brushes 104 and 106 are urged radially inward of the base portion 52. As a result, the other longitudinal ends of the first brushes 100 and 102 and the second brushes 104 and 106 protrude from the brush holder 88 toward the through hole 54 of the base portion 52 and come into contact with the commutator 28 described above. ing. Further, in this state, the other end portion of the torsion spring 82 is arranged in the non-interference groove 94 and the non-interference hole 92 of the brush holder 88 so that interference between the two is suppressed.

  Also, one end of a pigtail 108 made of a round bar-like stranded wire having conductivity and flexibility is embedded in one end in the longitudinal direction of the first brush 100, 102 and the second brush 104, 106. Each pigtail 108 extends from the first brush 100, 102 and the second brush 104, 106 to one side in the plate thickness direction of the base portion 52, and is movably inserted in the insertion groove 96 of the brush holder 88. Further, the pigtail 108 is curved at the middle portion in the longitudinal direction and is folded back to the other side of the base portion 52 in the plate thickness direction.

  The other end of the pigtail 108 provided on the first brush 100 is caulked and joined together by a first wire 128 and a choke coil (not shown), which will be described later, and a first connection fitting 68 as a caulking tool. . Further, the other end portion of the pigtail 108 provided on the first brush 102 is caulked and coupled together by a first wire 128 (described later) and a third connection fitting 110 as a caulking tool.

  Further, the other end portion of the pigtail 108 provided on the second brush 104 is caulked and coupled together by a second wire 130 and a choke coil (not shown) to be described later and a second connection fitting 70 as a caulking tool. . Further, the other end portion of the pigtail 108 provided on the second brush 106 is caulked and coupled together by a second wire 130 described later and a fourth connection fitting 112 as a caulking tool.

  Next, the groove part 120, the 1st wire 128, and the 2nd wire 130 are demonstrated. As shown in FIGS. 1 and 3, the groove part 120 includes a first groove part 122 and a second groove part 124. The first groove portion 122 and the second groove portion 124 are formed in the base portion 52 and open to one side of the base portion 52 in the plate thickness direction. The groove width of the first groove portion 122 is set slightly larger than the wire diameter of the first wire 128 described later, and the groove width of the second groove portion 124 is the wire diameter of the second wire 130 described later. It is set slightly larger than

  As shown in FIG. 1, the first groove portion 122 is seen from one side in the plate thickness direction of the base portion 52, from the side of the coil housing portion 60 </ b> A to one side in the circumferential direction of the base portion 52 (in the direction of arrow E in FIG. 1). And extends between the brush holder 88 for the first brush 102 and the rubber bush 86. Specifically, the proximal end portion of the first groove portion 122 is disposed on the side of the coil housing portion 60A, and the first groove portion 122 is directed from the proximal end portion to the brush holder 88 for the second brush 106. And extends below the brush holder 88 (the other side in the plate thickness direction of the base portion 52) at an intermediate position in the longitudinal direction of the brush holder 88. The first groove portion 122 that has passed through the lower side of the brush holder 88 for the second brush 106 further extends toward the brush holder 88 for the first brush 102, and is between the assembly groove 56 and the through hole 54. , And passes under the brush holder 88 at a longitudinal intermediate position of the brush holder 88 for the first brush 102 and extends between the brush holder 88 and the rubber bush 86.

  The first wire 128 is accommodated in the first groove portion 122. The first wire 128 is formed by bending a substantially round bar-shaped wire having conductivity and flexibility, and extends along the extending direction of the first groove 122. Accordingly, a part of the first wire 128 is disposed below the brush holder 88 for the second brush 106 (between the brush holder 88 and the base portion 52). A part is disposed below the brush holder 88 for the first brush 102 (between the brush holder 88 and the base portion 52).

  Then, one end in the longitudinal direction of the first wire 128 is bent toward one side in the plate thickness direction of the base portion 52, and is caulked together by the pigtail 108 provided on the first brush 102 and the third connection fitting 110 and coupled. ing. On the other hand, the other end portion in the longitudinal direction of the first wire 128 is bent toward one side in the plate thickness direction of the base portion 52, and the pigtail 108 and the choke coil (not shown) provided on the first brush 100 and the first connection fitting. At 68, they are crimped together. As a result, the first brushes 100 and 102 forming a pair are electrically connected by the first wire 128.

  On the other hand, the second groove portion 124 extends from the side of the coil housing portion 60B to the other circumferential side of the base portion 52 (the arrow F direction side in FIG. 1) when viewed from one side in the plate thickness direction of the base portion 52. It extends between the rubber bush 84 and the brush holder 88 for the second brush 106. Specifically, the base end portion of the second groove portion 124 is disposed on the side of the coil housing portion 60B, and the second groove portion 124 faces the brush holder 88 for the second brush 104 from the base end portion. And extends below the brush holder 88 (the other side in the plate thickness direction of the base portion 52) at an intermediate position in the longitudinal direction of the brush holder 88. The second groove 124 that has passed through the lower side of the brush holder 88 for the second brush 104 further extends toward the brush holder 88 for the first brush 102, and is between the assembly groove 58 and the through hole 54. And the lower side of the brush holder 88 for the first brush 102 passes at a position radially inward of the base portion 52 relative to the first groove portion 122. Further, the second groove portion 124 that has passed through the lower side of the brush holder 88 for the first brush 102 further extends toward the brush holder 88 for the second brush 106, and is between the assembly groove 56 and the through hole 54. And extends between the rubber bush 84 and the brush holder 88 for the second brush 106.

  The second wire 130 is accommodated in the second groove portion 124. The second wire 130 is formed by bending a substantially round bar-shaped wire having conductivity and flexibility, and extends along the extending direction of the second groove portion 124. Accordingly, a part of the second wire 130 is disposed below the brush holder 88 for the second brush 104 (between the brush holder 88 and the base portion 52), and other parts of the second wire 130 are arranged. A part is disposed below the brush holder 88 for the first brush 102 (between the brush holder 88 and the base portion 52).

  Then, one end in the longitudinal direction of the second wire 130 is bent toward one side in the plate thickness direction of the base portion 52, and the pigtail 108 and the choke coil (not shown) provided on the second brush 104 and the second connection fitting 70. They are crimped together and combined. On the other hand, the other end portion in the longitudinal direction of the second wire 130 is bent to one side in the plate thickness direction of the base portion 52, and is caulked together by the pigtail 108 provided on the second brush 106 and the fourth connection fitting 112. Has been. As a result, the second brushes 104 and 106 forming a pair are electrically connected by the second wire 130.

  Here, as viewed from one side in the plate thickness direction of the base portion 52, a portion where the first groove portion 122 and the second groove portion 124 intersect in the groove portion 120 is an intersection portion 126 (see FIG. 4B). A part of the second wire 130 intersects a part of the first wire 128 at the position of the intersection 126. At the intersecting portion 126, the first wire 128 and the second wire 130 are spaced apart from each other in the thickness direction of the base portion 52. That is, at the intersection 126, the first wire 128 and the second wire 130 are held in an electrically insulated state without contacting each other.

  This will be described with reference to FIGS. 4 (A) to 6 (B). 4A shows a cross section of the base portion 52 at the position of line 4A-4A in FIG. 1, and in FIGS. 4B to 6B, from the state of FIG. 4A. A cross section of the base portion 52 when the break position is gradually shifted to one side in the circumferential direction of the base portion 52 is shown.

  As shown in FIG. 4A, the second groove portion 124 is disposed on the radially outer side of the base portion 52 with respect to the first groove portion 122 at a position on the other circumferential side of the base portion 52 with respect to the intersecting portion 126. At the same time, it is disposed on the upper side of the first groove part 122 (one side in the plate thickness direction of the base part 52). That is, at this position, the second groove portion 124 and the first groove portion 122 are independently formed as separate grooves. Further, the second groove portion 124 is disposed below the flange portion 84 </ b> B of the rubber bush 84. That is, a part of the second groove portion 124 is blocked by the flange portion 84B, the second wire 130 passes under the flange portion 84B, and the withdrawal of the second wire 130 from the second groove portion 124 is rubber. It is suppressed by the bush 84.

  As shown in FIG. 4B, the second groove 124 and the first groove 122 communicate with each other in the thickness direction of the base 52 at the position of the intersection 126. However, at the position of the intersection 126, the second wire 130 is disposed above the first wire 128, and the first wire 128 and the second wire 130 are electrically insulated from each other in the thickness direction of the base portion 52. Arranged in a state.

  Further, as shown in FIG. 5A, the second groove 124 is radially inward of the base 52 with respect to the first groove 122 at a position on one side in the circumferential direction of the base 52 relative to the intersection 126. And at the upper side of the first groove 122. That is, at this position, the second groove portion 124 and the first groove portion 122 are independently formed as separate grooves separated in both the plate thickness direction and the radial direction of the base portion 52. As described above, the first groove portion 122 and the second groove portion 124 extend from the portions of the intersecting portion 126 having different groove depths to one side and the other side in the circumferential direction of the base portion 52, respectively.

  Further, as shown in FIGS. 5B to 6B, as the first groove 122 approaches the brush holder 88 for the first brush 102, the groove depth of the first groove 122 gradually increases. The first wire 128 is held shallowly by the first groove portion 122 and the bottom wall of the brush holder 88 under the brush holder 88. On the other hand, as the second groove portion 124 approaches the brush holder 88 for the first brush 102, the groove depth of the second groove portion 124 is gradually increased, and the second wire 130 is formed below the brush holder 88. Is separated from the bottom wall of the brush holder 88. That is, the first wire 128 and the second wire 130 passing under the brush holder 88 are the same electrode (more specifically, when connected to the pigtail of the brush held by the brush holder 88) The groove depths of the first groove portion 122 and the second groove portion 124 are set so as to be in contact with the brush holder 88 and separated from the brush holder 88 which is a different electrode.

  Therefore, the groove depth of the second groove portion 124 is set to a depth at which the second wire 130 and the brush holder 88 are brought into contact with each other below the brush holder 88 for the second brush 104. On the other hand, the groove depth of the first groove portion 122 is set to a depth at which the first wire 128 and the brush holder 88 are separated from each other below the brush holder 88 for the second brush 106.

  Furthermore, as shown in FIG. 3, the second groove portion 124 is disposed below the flange portion 86 </ b> B of the rubber bush 86. That is, a part of the second groove portion 124 is blocked by the flange portion 86B, the second wire 130 passes under the flange portion 86A, and the withdrawal of the second wire 130 from the second groove portion 124 is rubber. Even the bush 86 is suppressed.

  Further, as shown in FIG. 4B, the hook portion 132 is integrally formed in the first groove portion 122 at the position of the intersecting portion 126. The hook portion 132 is formed in a substantially trapezoidal cross section, and protrudes from one side wall of the first groove portion 122 toward the other side wall at a position above the first wire 128. Thereby, the upward movement of the first wire 128 is restricted by the hook portion 132, and the contact between the first wire 128 and the second wire 130 is prevented. In addition, the 1st wire 128 and the 2nd wire 130 are wire materials coat | covered with the insulating film, and the film | membrane is removed and it is electrically connected in the connection part.

  Next, the operation and effect of the present embodiment will be described.

  In the brush holder device 30 of the motor 10 configured as described above, the pair of first brushes 100 and 102 and the pair of second brushes 104 and 106 are arranged to face each other in the radial direction of the base plate 50. The pair of first brushes 100 and 102 are electrically connected by a first wire 128, and the pair of second brushes 104 and 106 are electrically connected by a second wire 130. The paired second brushes 104 and 106 have different polarities from the paired first brushes 100 and 102 when energized.

  A driving current is supplied to the first brushes 100 and 102 and the pair of second brushes 104 and 106 via the connector 46, the circuit board 44, and the first terminal 64 and the second terminal 66 as motor terminals, respectively, and the motor. The main body 12 is driven to rotate. The rotation of the motor body 12 is converted into electrical signals such as sensor signals (vehicle speed signals, etc.) and command signals (wiper switch signals, etc.) inputted to the circuit board 44 via the connector 46 to which an external connector is connected. Accordingly, drive control such as the rotation speed and rotation direction of the motor main body 12 and start / stop is performed. By controlling the rotation drive of the motor body 12, the wiper device of the vehicle is wiped and controlled. In the reversing operation of the wiper device, the rotational position of the output shaft 40 is detected by a rotational position detector (not shown) (for example, a magnetoresistive element), and the paired first brushes 100 and 102 are paired at the timing of the reversing position. By switching and controlling the polarity of the second brushes 104 and 106, the rotation direction of the rotating shaft 20 of the motor body 12 (that is, the rotating direction of the output shaft 40) is rotated forward and backward. In addition, a conventional 4-pole wiper motor (see Patent Document 1) can be driven at two high speed and low speed rotation speeds by forming a different magnetic circuit by supplying a drive current to a high speed brush or a low speed brush. However, in the present embodiment, the rotational speed of the motor body 12 is controlled by PWM control instead of switching the brush to be used by a PWM control circuit (not shown) provided in the circuit board 44.

  Here, the first wire 128 and the second wire 130 are accommodated in the groove 120 (the first groove 122 and the second groove 124) formed in the base plate 50, and the base plate 50 is formed of an insulating material. . For this reason, the 1st wire 128 and the 2nd wire 130 are arrange | positioned in the base plate 50 (base part 52) in the insulated state. Further, since the protrusion of the first wire 128 and the second wire 130 from the base plate 50 (base portion 52) is suppressed, even if the first wire 128 and the second wire 130 are provided in the brush holder device 30, the brush holder device. The increase in size in the radial direction and the plate thickness direction can be suppressed.

  In addition, a part of the groove 120 is blocked by the flanges 84B and 86B of the rubber bushes 84 and 86. As a result, the second wire 130 is prevented from coming out of the groove portion 120 by the flange portions 84B and 86B, and the second wire 130 is held in the groove portion 120. That is, by setting the positions of the groove 120 and the rubber bushes 84 and 86 so that a part of the groove 120 is blocked by the rubber bushes 84 and 86, a member that suppresses the second wire 130 from coming out of the groove 120 is provided. There is no need to provide it separately. Therefore, it is possible to arrange the first wire 128 and the second wire 130 with the brush holder device 30 having an efficient arrangement structure.

  As described above, the first brushes 100 and 102 and the second brushes 104 and 106 that are paired with each other can be connected with an efficient arrangement structure while suppressing the enlargement of the brush holder device 30 in the radial direction and the plate thickness direction.

  The first brushes 100 and 102 and the second brushes 104 and 106 are alternately arranged in the circumferential direction of the base plate 50. A rubber bushing 84 is disposed between the first brush 102 and the second brush 106, and a rubber bushing 86 is disposed between the first brush 102 and the second brush 104. For this reason, the 2nd brush 106, the rubber bush 84, the 1st brush 102, the rubber bush 86, and the 2nd brush 104 are arrange | positioned along with the circumferential direction one side of the baseplate 50 in this order. Thereby, for example, compared with the case where the rubber bushes 84 and 86 are disposed on the radially outer side of the base plate 50 with respect to the first brush 102 or the second brush 104 and 106, it is possible to suppress an increase in size of the base plate 50 in the radial direction.

  Further, the rubber bushes 84 and 86 are configured to include cylinder portions 84A and 86A and flange portions 84B and 86B, and a part of the groove portion 120 is closed by the flange portions 84B and 86B. As a result, the flanges 84B and 86B for holding the rubber bushes 84 and 86 on the base plate 50 can be used to suppress the second wire 130 from coming out of the groove 120. Therefore, the brush holder device 30 can be arranged more efficiently.

  Further, the gear housing 34 to which the brush holder device 30 is fixed closes the opening of the motor housing 14 to constitute the motor main body 12. Thereby, the 1st brushes 100 and 102 and the 2nd brushes 104 and 106 can be connected, suppressing the enlargement of the radial direction and axial direction of the motor 10 with which the brush holder apparatus 30 was used.

  Further, a four-pole permanent magnet 16 having different magnetic poles alternately in the circumferential direction of the motor housing 14 is fixed to the inner peripheral surface of the motor housing 14, and the motor 10 is configured as a so-called four-pole motor. As described above, the pair of first brushes 100 and 102 are connected by the first wire 128, and the pair of second brushes 104 and 106 are connected by the second wire 130. For this reason, since it is not necessary to carry out the equalizing line in the winding process for forming the armature coil 26 of the armature 18 and the connecting process with the commutator 28, the winding process and the connecting process should be simplified. Can do.

  In the present embodiment, the first wire 128 is disposed below the second wire 130 (the other side in the thickness direction of the base portion 52) at the intersection 126. Alternatively, the first groove portion 122 and the second groove portion 124 may be formed so that the second wire 130 is disposed below the first wire 128 at the intersecting portion 126. In this case, the position of the first groove 122 may be set so that a part of the first groove 122 is closed by the flange 84B of the rubber bush 84. Thereby, the first wire 128 can be held in the first groove portion 122 by the flange portion 84B. Furthermore, in this case, by forming the hook portion 132 in the second groove portion 124, the movement of the second wire 130 to the one side in the plate thickness direction of the base portion 52 can be restricted by the hook portion 132.

  In the present embodiment, one hook portion 132 is provided in the first groove portion 122, but a plurality of hook portions 132 may be provided.

  Further, in the present embodiment, the second wire 130 and the brush holder 88 for the second brush 104 are in contact with each other, and the first wire 128 and the brush holder 88 for the first brush 102 are in contact with each other. Yes. Instead, the first groove portion 122 is configured so that the second wire 130 and the brush holder 88 for the second brush 104 are separated from each other, and the first wire 128 and the brush holder 88 for the first brush 102 are separated from each other. The groove depth between the first groove portion 124 and the second groove portion 124 may be set.

  Further, in the present embodiment, since the base plate 50 is formed of a resin material, the brush is preferably used as a preferable configuration in which thermal contact is prevented by preventing direct contact of the brush (smooth movement of the brush is not hindered). Although the holder 88 is formed in a rectangular cylindrical shape, if the base plate 50 is formed of a resin material having sufficient heat resistance, the bottom wall of the brush holder 88 is omitted and the brush holder 88 is viewed from the longitudinal direction. You may form in the substantially reverse U shape open | released to the base part 52 side.

  In the present embodiment, the motor 10 includes the motor main body 12 and the speed reduction unit 32. Instead of this, the speed reduction part 32 may be omitted from the motor 10, and an end plate fixed to the opening of the motor housing 14 and closed may be provided separately, and the brush holder device 30 may be fixed to the end plate. Good. That is, you may use the brush holder apparatus 30 for the motor 10 which is not provided with the deceleration part 32. FIG.

  In the present embodiment, the motor body 12 of the motor 10 is a motor in which the motor body 12 rotates forward and backward. However, a current having a polarity fixed to the pair of first brushes 100 and 102 and the pair of second brushes 104 and 106. For example, the pair of first brushes 100 and 102 may be fixed as a positive electrode brush and the pair of second brushes 104 and 106 may be fixed as a negative electrode brush to form a motor 10 that rotates in one direction.

DESCRIPTION OF SYMBOLS 10 ... Motor, 14 ... Motor housing (first housing), 16 ... Permanent magnet, 30 ... Brush holder device, 34 ... Gear housing (second housing), 36 ... Holder Housing part (supporting main body part), 50 ... base plate, 52 ... base part, 56, 58 ... assembly groove (fitted part), 84, 86 ... rubber bush (supporting member), 84A, 86A ... cylinder, 84B, 86B ... flange, 100, 102 ... first brush, 104, 106 ... second brush, 120 ... groove, 128 ... first Wire (first connecting member), 130 ... second wire (second connecting member)

Claims (5)

A base plate that is supported by a support main body part that constitutes a part of the motor via a support member, is made of an insulating material, and is formed in an annular shape,
A first connecting member that connects the first brushes that form a pair provided on one side in the thickness direction of the base plate;
A second connecting member that connects the second brushes that form a pair provided on one side in the thickness direction of the base plate;
A groove formed on the base plate, opened to one side in the plate thickness direction of the base plate, in which the first connection member and the second connection member are housed, and a part of which is blocked by the support member; ,
A brush holder device comprising: Each of the first brush and the second brush is alternately arranged in the circumferential direction of the base plate,
The brush holder device according to claim 1, wherein the support member is disposed between the first brush and the second brush. The base plate is formed with a fitted portion into which the support member is fitted,
The support member includes a cylindrical portion that is fitted in the fitted portion and has a flange portion formed at both axial ends of the cylindrical portion, with the plate thickness direction of the base plate being an axial direction. Configured,
The brush holder device according to claim 1 or 2, wherein a part of the groove portion is closed by the flange portion.   The motor provided with the brush holder apparatus of any one of Claims 1-3. The motor includes a first housing formed in a cylindrical shape, and a second housing configured to be fixed and closed at an opening of the first housing and include the support main body.
In the first housing, four-pole permanent magnets having different magnetic poles alternately in the circumferential direction of the first housing are fixed,
5. The motor according to claim 4, wherein each of the pair of first brushes and the pair of second brushes is disposed to face the radial direction of the base plate.