JP5123151B2 - motor - Google Patents

Description

  The present invention relates to a motor used as a drive source for vehicle electrical components such as a wiper device.

  Conventionally, a vehicle such as an automobile is equipped with a wiper device that wipes rainwater and the like attached to a windshield. As a drive source of the wiper device, an electric motor (motor) with a speed reduction mechanism that is small in size and obtains a high output is used. Such an electric motor with a speed reduction mechanism is described in, for example, Patent Document 1. Technologies are known.

  The electric motor with a speed reduction mechanism described in Patent Document 1 includes an electric motor and a speed reduction mechanism. The electric motor has a yoke (motor case), and an armature core (armature) and a motor shaft (armature shaft) are rotatably provided inside the yoke. The reduction mechanism has a case frame (gear case), and a worm, a worm gear, and first and second gears (reduction gears) are rotatably provided inside the case frame. A brush holder is fixed to the case frame, and the brush holder is provided with a brush that is in sliding contact with a commutator fixed to the motor shaft.

The case frame is closed by a case cover (gear cover), and the case cover is provided with a power supply side terminal (cover side conductive member) whose one end is electrically connected to a power connection terminal (external terminal). . On the other hand, the brush holder is provided with a brush side terminal (brush side conductive member) whose one end is electrically connected to the brush. A connection unit is electrically connected to the other end of the brush side terminal. When the case cover is attached to the case frame, the other end of the power supply side terminal is electrically connected to the connection unit. Thus, the power supply side terminal and the brush side terminal are electrically connected.
Japanese Patent Laying-Open No. 2003-284282 (FIG. 9)

  However, according to the electric motor with a speed reduction mechanism described in Patent Document 1 described above, when the case cover is mounted on the case frame, it is necessary to accurately align the power supply side terminal and the connection unit with each other in the mounting direction. If it is mounted in a state where the alignment accuracy is low, a problem may occur such that an excessive force is applied to the end portion of the power supply side terminal and the power supply side terminal is bent and deformed. When the power supply side terminal is bent and deformed, it takes time and effort to temporarily remove the case cover from the case frame, straighten the end of the power supply side terminal, and reattach the case cover to the case frame.

  An object of the present invention is to provide a motor that can be electrically connected with high precision without bending and deforming a conductive member, and can save the trouble of remounting.

  The motor of the present invention includes a motor case that rotatably accommodates an armature having an armature shaft, a gear case that rotatably accommodates a reduction gear that decelerates rotation of the armature shaft, and a gear cover that closes an opening of the gear case. A motor having a brush holder provided between the motor case and the gear case, the commutator fixed to the armature shaft, the brush held by the brush holder and in sliding contact with the commutator, A brush-side conductive member provided on the brush holder, having one end side electrically connected to the brush and the other end side disposed in the gear case, provided on the gear cover, and having one end side electrically connected to an external terminal A cover-side conductive member whose other end is electrically connected to the other end of the brush-side conductive member; A mounting guide portion provided on at least one of the brush holder and the gear case for guiding the mounting of the gear cover to the gear case; and a mounted guide provided on the gear cover and mounted on the mounting guide portion. And the other end side of the cover side conductive member is electrically connected to the other end side of the brush side conductive member by mounting the mounted guide portion to the mounting guide portion. To do.

  The motor of the present invention is characterized in that the mounting guide portion is disposed close to the other end side of the brush side conductive member, and the mounted guide portion is disposed close to the other end side of the cover side conductive member.

  The motor of the present invention is characterized in that the gear case has a positioning portion for positioning the brush holder with respect to the gear case.

  In the motor of the present invention, the gear cover is formed of a cover member and an insulator fixed to the cover member, the cover-side conductive member is mounted on the insulator, and the mounted guide portion is formed on the insulator. Features.

  According to the motor of the present invention, at least one of the brush holder and the gear case is provided with the mounting guide portion for guiding the mounting of the gear cover to the gear case, and the gear cover has the mounted guide portion mounted on the mounting guide portion. And the other end side of the cover side conductive member is electrically connected to the other end side of the brush side conductive member by mounting the mounted guide portion to the mounting guide portion. Therefore, when the gear cover is mounted on the gear case, the conductive members can be electrically connected by simply mounting the mounted guide portion on the mounting guide portion. As a result, the conductive member can be electrically connected with high accuracy without being bent and deformed, and it is possible to omit troubles such as correcting the bending deformation of the conductive member and mounting it again.

  According to the present invention, the mounting guide portion is disposed close to the other end side of the brush side conductive member, and the mounted guide portion is disposed close to the other end side of the cover side conductive member. Can be connected.

  According to the present invention, since the gear case has a positioning portion that positions the brush holder with respect to the gear case, the brush holder can be accurately placed at a predetermined position of the gear case, and each conductive member is electrically connected with higher accuracy. can do.

  According to the present invention, the gear cover is formed from the cover member and the insulator fixed to the cover member, the cover-side conductive member is mounted on the insulator, and the mounted guide portion is formed on the insulator. It can be diverted to a specification motor, and can reduce the manufacturing cost by sharing parts.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an explanatory diagram for explaining a wiper device provided with a wiper motor (motor) according to the present invention, FIG. 2 is a plan view showing the wiper motor of FIG. 1, and FIG. 3 is an explanation explaining the internal structure of the wiper motor of FIG. 4 (a) and 4 (b) are partial enlarged views showing the broken-line circle A portion of FIG. 3 in an enlarged manner, FIG. 5 is an explanatory view for explaining the detailed structure of the brush holder, and FIG. FIG. 7 is an enlarged view showing a detailed structure of the gear cover, and FIG. 8 is an enlarged view showing an enlarged broken line circle C portion of FIG. Yes.

  As shown in FIG. 1, a windshield 11 is provided on the front side of the vehicle 10, and on the windshield 11, a DR side that wipes out deposits such as rain and dust attached to the windshield 11 ( A driver seat side wiper member 12 and an AS side (passenger seat side) wiper member 13 are provided.

  The DR-side wiper member 12 has a DR-side wiper blade 12a and a DR-side wiper arm 12b, and the DR-side wiper blade 12a is rotatably attached to the distal end side of the DR-side wiper arm 12b. The AS-side wiper member 13 has an AS-side wiper blade 13a and an AS-side wiper arm 13b, and the AS-side wiper blade 13a is rotatably attached to the distal end side of the AS-side wiper arm 13b.

  Each wiper blade 12a, 13a is brought into elastic contact with the windshield 11 by a coil spring (tensile spring) (not shown) provided inside each wiper arm 12b, 13b.

  The wiper blades 12a and 13a perform a reciprocating wiping operation in the same direction in synchronization with each wiping range 11a and 11b formed between the lower inversion position LRP and the upper inversion position URP on the windshield 11. It has become. That is, the wiping pattern of each wiper blade 12a, 13a is a tandem type.

  On the front end side of the windshield 11 in the vehicle 10, a wiper device 14 for wiping the wiper blades 12a and 13a is mounted. The wiper device 14 is a wiper motor (motor) 15 that is rotationally driven by an operation of a wiper switch (not shown) provided in a passenger compartment or the like, and converts the rotational motion of the wiper motor 15 into the swing motion of the wiper blades 12a and 13a. The link mechanism 16 is provided.

  By operating the wiper switch to rotationally drive the wiper motor 15, the link mechanism 16 is driven to swing, whereby each wiper arm 12b fixed to the DR side pivot shaft 17a and the AS side pivot shaft 17b provided in the vehicle 10 is provided. 13b (each wiper blade 12a, 13a) swings on the windshield 11.

  As shown in FIGS. 2 and 3, the wiper motor 15 includes a motor unit 20 and a gear unit 30. In FIG. 3, the gear cover 60 (see FIG. 7) and the motor case 21 are omitted for easy understanding of the internal structure of the wiper motor 15.

  The motor unit 20 includes a motor case 21 formed into a bottomed cylindrical shape by pressing (deep drawing) a steel plate or the like. As shown in FIG. The permanent magnets 22 are arranged so as to face each other. Inside each permanent magnet 22, an armature 23 is rotatably provided through a predetermined gap, and an armature shaft 24 penetrates and is fixed to the rotation center of the armature 23. Thus, the motor case 21 accommodates the armature 23 and the armature shaft 24 rotatably.

  The base end side (right side in the figure) of the armature shaft 24 is supported by the bottom 21a of the motor case 21 via a bearing member (not shown), and the distal end side (left side in the figure) of the armature shaft 24 is the gear. It extends to the inside of the gear case 31 that forms the portion 30. A first worm 24a and a second worm 24b are integrally provided in the axial direction on the distal end side of the armature shaft 24, and the molding directions (winding directions) of the worms 24a and 24b are opposite to each other. Yes.

  A commutator 25 formed in a cylindrical shape is fixed between the worms 24 a and 24 b of the armature shaft 24 and the armature 23. An end of a coil (not shown) wound around the armature 23 is electrically connected to the commutator 25, and a plurality of brushes 53 a are in sliding contact with the outer periphery of the commutator 25. . As a result, when a drive current is supplied to the commutator 25 and the coil via each brush 53a, an electromagnetic force (rotational force) is generated in the armature 23 so that the armature shaft 24 rotates at a predetermined rotation speed / rotation direction. ing.

  The gear unit 30 includes a gear case 31 and a gear cover 60. The gear case 31 is formed into a bottomed shape by casting an aluminum material or the like, and is connected to the opening side (left side in the figure) of the motor case 21 by a pair of fastening screws 18 as shown in FIG. . Inside the gear case 31, a worm wheel 32 having an output shaft 32a integrally provided at the center of rotation is rotatably accommodated. Between the worm wheel 32 and each worm 24a, 24b, a first counter gear is provided. 33 and a second counter gear 34 are rotatably provided.

  On the outer peripheral portion of the worm wheel 32, gear teeth 32 b are formed which mesh with the small-diameter gears 33 a and 34 a provided integrally with the counter gears 33 and 34, respectively. The counter gears 33 and 34 have large-diameter gears 33b and 34b in addition to the small-diameter gears 33a and 34a, respectively. The large-diameter gears 33b and 34b are engaged with the worms 24a and 24b, respectively. Yes. Since the winding directions of the worms 24a and 24b are opposite to each other, for example, when the worms 24a and 24b are rotated in the forward direction, both the counter gears 33 and 34 are rotated in the clockwise direction. Further, the worm wheel 32 rotates counterclockwise.

  Here, the first worm 24 a, the second worm 24 b, the first counter gear 33, the second counter gear 34, and the worm wheel 32 decelerate and output the rotation of the armature shaft 24. It is housed in the interior so that it can rotate freely. The first worm 24a, the second worm 24b, the first counter gear 33, the second counter gear 34, and the worm wheel 32 constitute a reduction gear in the present invention.

  A holder case portion 35 to which the brush holder 50 is attached is integrally provided on the gear case 31 on the motor case 21 side. Near the holder case portion 35 of the gear case 31, a holder terminal accommodating portion 36 that accommodates the holder terminal portion 52 of the brush holder 50 is integrally provided. The holder terminal accommodating portion 36 is configured to position the holder terminal portion 52 at a predetermined location inside the gear case 31.

  As shown in FIGS. 3 and 4, the holder terminal accommodating portion 36 is formed in a substantially rectangular shape extending in the axial direction of the armature shaft 24. In FIG. 4, the holder terminal portion 52 is omitted for easy understanding of the detailed structure of the holder terminal accommodating portion 36.

  As shown in FIG. 4A, a support protrusion 36a that protrudes toward the holder case 35 is provided on the distal end side (left side in the figure) of the holder terminal accommodating part 36, and the lower side of the support protrusion 36a. A protrusion accommodating portion 36b into which the protrusion 52a of the holder terminal portion 52 enters is formed. That is, the support protrusion 36a positions the holder terminal portion 52 in the depth direction of the gear case 31. Here, the support protrusion 36a and the protrusion accommodating part 36b constitute a positioning part in the present invention.

  On the base end side (right side in the drawing) of the holder terminal accommodating portion 36, a concave groove 36c that is recessed toward the holder case portion 35 is provided as shown in FIG. The concave groove 36c extends in the depth direction of the gear case 31, and is provided on the opening side of the gear case 31 with respect to the support protrusion 36a. That is, the support protrusion 36 a is provided on the bottom side of the gear case 31, and the concave groove 36 c is provided on the opening side of the gear case 31.

  As shown in FIG. 3, the concave groove 36c is disposed close to the terminal piece 54a of the holder terminal portion 52 (for example, 5.0 mm as a separation distance), and the guide protrusion 85 of the insulator 80 enters the concave groove 36c. It is like that. The concave groove 36 c is configured to position the insulator 80 in a direction orthogonal to the depth direction of the gear case 31 (width direction of the gear case 31). Here, the concave groove 36c constitutes a mounting guide portion in the present invention.

  A cylindrical portion 37 is disposed in the vicinity of the holder terminal accommodating portion 36, and a communication passage 37 a is formed at the center of the cylindrical portion 37 so as to penetrate in the axial direction of the cylindrical portion 37. The communication path 37a communicates the inside and outside of the gear case 31. The cylindrical portion 37 allows air to flow back and forth between the inside of the gear case 31 and the outside through the communication path 37a according to a temperature change inside the gear case 31 when the wiper motor 15 is rotationally driven. Yes. Note that a blister cap (not shown) that bends the air flow path in order to prevent rainwater, dust, and the like from entering can be attached to the cylindrical portion 37.

  A brush holder 50 is provided between the gear case 31 and the motor case 21. The brush holder 50 is attached to a holder case portion 35 formed on the gear case 31, and the brush holder 50 is formed of a resin material such as plastic. As shown in FIG. 5, the brush holder 50 includes a holder main body 51 formed in a bottomed shape, and a holder terminal portion 52 provided integrally with the holder main body 51.

  The holder main body 51 has a bottom wall portion 51 a and a side wall portion 51 b, and the side wall portion 51 b is fitted inside the holder case portion 35. A plate-like brush holder base 53 made of a resin material such as plastic is provided inside the holder main body 51, and the brush holder base 53 includes a plurality of brushes 53 a (1 in the drawing) that are in sliding contact with the outer periphery of the commutator 25. Holding only one). The brush holder base 53 is provided with electronic components (not shown) such as a choke coil in addition to the brushes 53a.

  The bottom wall 51a of the holder body 51 and the brush holder base 53 are provided with through holes 51c and 53b through which the commutator 25 fixed to the armature shaft 24 passes. The diameter dimension of each of the through holes 51c and 53b is set to be larger than the diameter dimension of the commutator 25 so that a predetermined clearance is formed between the through holes 51c and 53b. Thereby, the commutator 25 is freely rotatable on the inner side in the radial direction of the through holes 51c and 53b.

  The holder terminal portion 52 is provided integrally with the bottom wall portion 51a and extends in a direction (left side in the drawing) opposite to the protruding direction (right side in the drawing) of the side wall portion 51b. The holder terminal portion 52 is formed in a substantially rectangular shape similar to the inner shape of the holder terminal accommodating portion 36 of the gear case 31. When the brush holder 50 (holder body 51) is attached to the holder case portion 35, the holder terminal portion 52 The part 52 is disposed inside the holder terminal accommodating part 36 (see FIG. 3).

  The holder terminal portion 52 is provided with three brush-side conductive members 54 made of a conductive material (brass material or the like) excellent in conductivity. One end side of each brush-side conductive member 54 is electrically connected to each brush 53a via a connecting conductor (not shown). On the other hand, terminal pieces 54 a are formed on the other end side of each brush-side conductive member 54, and each terminal piece 54 a protrudes outside the holder terminal portion 52 and extends in the longitudinal direction of the holder terminal portion 52. It is provided along with equal intervals along.

  As shown in FIG. 6, a protrusion 52 a that is supported by a support protrusion 36 a (see FIG. 4A) formed on the holder terminal accommodating portion 36 of the gear case 31 is integrally provided on the distal end side of the holder terminal portion 52. It has been. The protruding portion 52a protrudes in the longitudinal direction of the holder terminal portion 52, and enters the protruding portion receiving portion 36b (see FIG. 4A) on the lower side of the supporting protrusion 36a.

  On the distal end side of the holder terminal portion 52, a pair of convex portions 52 b that protrude in the longitudinal direction and the short direction of the holder terminal portion 52 and extend in the depth direction of the gear case 31 are provided. Each convex portion 52b is disposed close to the terminal piece 54a (for example, 2.0 mm as a separation distance), and each convex portion 52b constitutes a mounting guide portion in the present invention. A guide leg portion 84 of the insulator 80 is attached to each convex portion 52b. Each convex portion 52b is integrally provided with a fitting portion 52c that is thicker than the other portions, and each fitting portion 52c is fitted inside the guide leg portion 84 to provide an insulator 80. The holder terminal portion 52 is prevented from rattling.

  As shown in FIG. 7, the gear cover 60 includes a cover member 70 and an insulator 80. The cover member 70 is formed in a bottomed shape from a resin material such as plastic, and includes a bottom portion 71 and a peripheral wall portion 72. The outer shape of the cover member 70 is formed in a shape substantially the same as the opening of the gear case 31, so that the opening of the gear case 31 can be closed.

  The bottom portion 71 and the peripheral wall portion 72 are formed with a plurality of fixing claws 73 for fixing the insulator 80 to predetermined locations of the bottom portion 71. The bottom portion 71 is provided with three gear support portions 74 that support the rotation centers of the worm wheel 32, the first counter gear 33, and the second counter gear 34 from the axial direction. Each gear support portion 74 is configured to suppress rattling in the axial direction of the worm wheel 32, the first counter gear 33, and the second counter gear 34. The bottom portion 71 is provided with a plurality of sliding contact ribs 75 that are in sliding contact with the worm wheel 32. The sliding contact ribs 75 are inclined by the worm wheel 32 having a larger diameter than the counter gears 33 and 34. It is designed to suppress rotation.

  A seal groove 76 is provided along the shape of the peripheral wall 72 on the side opposite to the bottom 71 side of the peripheral wall 72, and a rubber seal member (not shown) is attached to the seal groove 76. It is like that. The seal member is sandwiched between the gear case 31 and the cover member 70, thereby sealing between the two.

  The peripheral wall portion 72 is integrally provided with a connector connection portion 77 for connecting an external connector (not shown) provided on the vehicle 10 side. The connector connecting portion 77 is formed in a hollow shape, and a terminal piece (not shown) on one end side (left side in the figure) of the cover side conductive member 83 attached to the insulator 80 is disposed inside the connector connecting portion 77. Has been.

  The insulator 80 is formed in a predetermined shape from a resin material such as plastic, and includes a main body portion 81 formed in a plate shape and a standing portion 82 provided integrally with the main body portion 81. The main body 81 is fixed to the bottom 71 of the cover member 70 by the fixing claws 73.

  A plurality of cover-side conductive members 83 are attached to the main body portion 81 along the longitudinal direction of the main body portion 81, and a terminal piece on one end side of each cover-side conductive member 83 is provided inside the connector connection portion 77. It extends to. Thus, one end side of each cover side conductive member 83 is electrically connected to an external terminal (not shown) provided inside the external connector. Each cover-side conductive member 83 is also formed of a conductive material (brass material or the like) excellent in conductivity, as with each brush-side conductive member 54.

  The standing portion 82 is integrally formed on the other end side (right side in the drawing) along the longitudinal direction of the main body portion 81, and has a substantially box shape extending in the depth direction of the cover member 70. Inside the standing portion 82, a terminal piece 83 a on the other end side of the three cover side conductive members 83 of the cover side conductive members 83, and a female terminal 83 b electrically connected to the terminal piece 83 a. Are arranged (see FIG. 10). As shown in FIG. 8, three insertion holes 82a are formed at the tip of the standing portion 82, and the terminal pieces 54a of the respective brush-side conductive members 54 are respectively inserted into the insertion holes 82a. It is like that. Each insertion port 82a is provided with a tapered wall portion 82b for guiding insertion of each terminal piece 54a.

  A guide leg portion 84 extending in the depth direction of the cover member 70 is integrally provided on the connector connecting portion 77 side of the standing portion 82. The guide leg portion 84 has a pair of leg pieces 84a having a substantially U-shaped cross section, and the guide leg portion 84 is formed with the opening sides of the leg pieces 84a facing each other. When the gear cover 60 is attached to the gear case 31, the guide leg 84 enters the holder terminal accommodating portion 36 (see FIG. 4) of the gear case 31. The length of the guide leg 84 is as follows: Under the state where the gear cover 60 is attached to the gear case 31, the length is set such that the front end is close to the bottom of the gear case 31.

  When the gear cover 60 is attached to the gear case 31, the projections 52 b of the holder terminal portion 52 slide into the leg pieces 84 a forming the guide legs 84, respectively. A tapered wall portion 84b that guides the slide of each convex portion 52b is provided at the distal end portion of the piece 84a. The guide leg portion 84 is disposed close to the terminal piece 83a of the cover-side conductive member 83 (for example, 2.0 mm as a separation distance), and the guide leg portion 84 constitutes a mounted guide portion in the present invention. .

  A guide protrusion 85 that protrudes toward the motor case 21 is integrally provided on the motor case 21 side of the standing portion 82. The guide projection 85 has a substantially U-shaped cross section so as to open toward the motor case 21, and the length of the guide projection 85 in the depth direction of the cover member 70 is larger than that of the guide leg portion 84. Even short length dimensions are set. The guide protrusion 85 enters the groove 36c of the gear case 31 with the gear cover 60 mounted on the gear case 31, and the protrusion height of the guide protrusion 85 is substantially equal to the depth dimension of the groove 36c. It is set to the same height dimension. As a result, rattling of the guide protrusion 85 with respect to the concave groove 36c is suppressed. The guide protrusion 85 is disposed close to the terminal piece 83a of the cover-side conductive member 83 (for example, 5.0 mm as a separation distance), and the guide protrusion 85 constitutes a mounted guide portion in the present invention.

  The leg pieces 84a and the guide projections 85 of the guide leg portion 84 are formed in the respective convex portions 52b and the concave grooves 36c by bringing the gear cover 60 and the gear case 31 in a parallel state when the gear cover 60 is attached to the gear case 31. Engage and slide. When the leg pieces 84a and the guide projections 85 are slid into the convex portions 52b and the concave grooves 36c in order to attach the gear cover 60 to the gear case 31, the terminal pieces 54a of the brush-side conductive members 54 are started after the sliding. And the terminal piece 83a of each cover-side conductive member 83 are electrically connected.

  A base end side of a pair of contact plates 86 and 87 is attached to the main body 81 of the insulator 80, and each contact plate 86 and 87 is also formed of a conductive material (brass material or the like) having excellent conductivity. . The base end portions of the contact plates 86 and 87 are electrically connected to any one of the cover side conductive members 83, respectively. The front ends of the contact plates 86 and 87 slide on a relay plate 88 (shaded portion in FIG. 3) made of a copper plate or the like attached to the worm wheel 32 with the gear cover 60 and the gear case 31 attached. It comes to touch. As a result, for example, if the controller (not shown) detects that the tips of the contact plates 86 and 87 are both in contact with the relay plate 88 and short-circuited, the wiper motor 15 is stopped. (Stop position control) can be performed.

  Next, the assembly procedure of the wiper motor 15 configured as described above will be described in detail with reference to the drawings. FIG. 9 is an explanatory view for explaining a state where the insulator (gear cover) is attached to the gear case, and FIGS. 10A and 10B are connections between the other end side of the brush side conductive member and the other end side of the cover side conductive member. 11 (a) and 11 (b) are cross-sectional views showing a state in which an insulator (gear cover) is mounted on the gear case, respectively.

  9 and 10, the cover member 70 is omitted in order to make it easy to understand the mounting state of the insulator 80 to the gear case 31. First, as shown in FIG. 9, the insulator 80 (gear cover 60) and the gear case 31 are held in parallel and face each other. Then, as indicated by the broken line arrows in the figure, the guide legs 84, the convex portions 52b, the guide protrusions 85, and the concave grooves 36c are aligned so as to face each other in the depth direction of the gear case 31 and to be attached to each other. Thereafter, the insulator 80 is relatively moved toward the gear case 31 under the state to bring them close to each other.

  When the insulator 80 is brought close to the gear case 31, as shown in FIG. 10A, the tip end portion of the guide leg portion 84 is attached to each convex portion 52b, and at the same time, the lower end side of the guide projection 85 is recessed in the groove 36c. It is attached to. Thereby, the attachment of the insulator 80 to the gear case 31 is guided. At this time, for example, even if an external force in the tilt direction is applied to the insulator 80, the insulator 80 and the gear case 31 are mounted by mounting the guide leg portion 84 on each convex portion 52b and mounting the guide projection 85 on the concave groove 36c. Can be maintained in a parallel state.

  At this time, the terminal pieces 54a of the respective brush-side conductive members 54 are inserted into the respective insertion ports 82a by the mounting of the guide legs 84 to the respective convex portions 52b and the mounting of the guide protrusions 85 to the concave grooves 36c. It is automatically and accurately aligned in the direction. Under these conditions, as shown by the arrows in the drawing, the terminal pieces 54a of the respective brush-side conductive members 54 are guided to the tapered wall portions 82b of the respective insertion ports 82a, so that the standing portions are arranged. Enter 82.

  Following entry of the terminal piece 54a into the standing portion 82, the terminal piece 54a of each brush-side conductive member 54 is electrically connected to a female terminal 83b connected to the terminal piece 83a of each cover-side conductive member 83. Is done. Thereafter, the mounting of the insulator 80 (gear cover 60) to the gear case 31 is completed. As shown in FIG. 10B, the terminal pieces 54a of the brush-side conductive members 54 and the terminal pieces 83a of the cover-side conductive members 83 Are electrically connected via the female terminal 83b. Then, the gear cover 60 and the gear case 31 are screwed together (not shown in detail), whereby the assembly of the wiper motor 15, that is, the mounting operation of the gear cover 60 to the gear case 31 is completed.

  After the work of attaching the gear cover 60 to the gear case 31, as shown in FIG. 11A, the guide leg portion 84 is housed in the holder terminal accommodating portion 36 while holding the convex portions 52b. Further, as shown in FIG. 11B, the guide protrusion 85 is received in the concave groove 36c. As a result, rattling of the guide legs 84 and the guide projections 85 inside the holder terminal accommodating portion 36 is suppressed, and the wiper motor 15 can be made quieter.

  As described above in detail, according to the wiper motor 15 according to the present embodiment, the protrusions 52b / grooves 36c for guiding the mounting of the gear cover 60 to the gear case 31 are provided on both the brush holder 50 / gear case 31, respectively. The insulator 80 that forms the gear cover 60 is provided with guide legs 84 / guide projections 85 that are mounted in the respective protrusions 52b / grooves 36c. The terminal piece 83a of the cover-side conductive member 83 is electrically connected to the terminal piece 54a of the brush-side conductive member 54 by mounting the guide leg portion 84 / guide protrusion 85 on each convex portion 52b / concave groove 36c. I did it.

  Accordingly, when the gear cover 60 is mounted on the gear case 31, the conductive members 54 and 83 are automatically electrically connected only by mounting the guide legs 84 / guide protrusions 85 in the respective convex portions 52b / grooves 36c. can do. Accordingly, the conductive members 54 and 83 can be electrically connected with high accuracy without bending and deforming the terminal piece 54a of the brush side conductive member 54 that protrudes to the outside of the holder terminal portion 52 in particular. It is possible to omit the trouble of correcting and bending the conductive member and remounting it.

  Further, according to the wiper motor 15 according to the present embodiment, the respective convex portions 52b / concave grooves 36c are disposed close to the terminal pieces 54a of the brush-side conductive member 54, and the guide legs 84 / guide protrusions 85 are disposed on the cover-side conductive member. Since the 83 terminal pieces 83a are disposed close to each other, the conductive members 54 and 83 can be electrically connected with higher accuracy.

  Furthermore, according to the wiper motor 15 according to the present embodiment, the gear case 31 has the support protrusion 36a / protrusion receiving portion 36b for positioning the brush holder 50 with respect to the gear case 31, so that the brush holder 50 is placed at a predetermined position of the gear case 31. Therefore, the conductive members 54 and 83 can be electrically connected with higher accuracy.

  Further, according to the wiper motor 15 according to the present embodiment, the gear cover 60 is formed from the cover member 70 and the insulator 80 fixed to the cover member 70, the cover-side conductive member 83 is attached to the insulator 80, and the insulator 80 Since the guide legs 84 / guide projections 85 are formed in the cover member 70, the cover member 70 can be used for a motor of another specification (for example, a motor having a different arrangement pattern of the cover-side conductive member), and the parts are manufactured in common. Cost can be reduced.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above embodiment, each brush holder 50 / gear case 31 is provided with the respective protrusions 52b / grooves 36c, and the insulator 80 is provided with the guide legs 84 / guide protrusions 85, respectively. The present invention is not limited to this, and for example, only one set may be provided if the parallel state of the gear cover 60 and the gear case 31 can be maintained by an assembly jig or the like. In other words, any one of the set of the convex portions 52b / guide legs 84 and the set of the concave grooves 36c / guide protrusions 85 can be omitted.

  Further, in the above-described embodiment, the protrusions 52b / grooves 36c are arranged close to the terminal pieces 54a of the brush-side conductive member 54 so that the separation distance is 5.0 mm or less, and the guide legs 84 / guide protrusions are arranged. 85 is disposed close to the terminal piece 83a of the cover-side conductive member 83. However, the present invention is not limited to this, and the protrusions 52b / grooves 36c ( (Mounting guide part), guide leg part 84 / guide protrusion 85 (attached guide part) can also be provided. In this case, the rigidity of the mounting guide portion / attached guide portion is increased. In other words, by increasing the rigidity of the mounting guide portion / attached guide portion, the gear cover and the gear case can be kept parallel even when the separation distance is increased, and the cover side conductive member and the brush side conductive member are mounted. Alignment accuracy in the direction can be ensured.

  Further, in the above embodiment, the gear cover 60 is configured by the cover member 70 and the insulator 80 to which the cover side conductive member 83 is attached. However, the present invention is not limited to this, and the insulator is omitted. Alternatively, the gear cover may be configured as a single unit, and the cover side conductive member may be embedded in the gear cover by insert molding or the like, and a mounted guide portion may be provided at a predetermined position of the gear cover. In this case, the number of parts can be reduced by the amount that the insulator is omitted.

  In the above embodiment, the wiper motor 15 is used as a drive source for the wiper device 14 having the wiping pattern of the tandem type. It can also be used as a drive source for a pattern wiper device.

  Further, in the above embodiment, the wiper motor 15 is used as a drive source for the wiper device 14 provided on the front side of the vehicle 10. However, the present invention is not limited to this, and the rear side of the vehicle 10 is used. It can also be used as a drive source for wiper devices provided in railway vehicles, airplanes, and the like.

It is explanatory drawing explaining the wiper apparatus provided with the wiper motor (motor) which concerns on this invention. It is a top view which shows the wiper motor of FIG. It is explanatory drawing explaining the internal structure of the wiper motor of FIG. (A), (b) is the elements on larger scale which expand and show the broken-line circle A part of FIG. It is explanatory drawing explaining the detailed structure of a brush holder. It is the elements on larger scale which expand and show the broken-line circle B part of FIG. It is explanatory drawing explaining the detailed structure of a gear cover. It is an enlarged view which expands and shows the broken-line circle C part of FIG. It is explanatory drawing explaining the mounting state to the gear case of an insulator (gear cover). (A), (b) is a longitudinal cross-sectional view which shows the connection state of the other end side of a brush side electrically-conductive member, and the other end side of a cover side electrically-conductive member. (A), (b) is a cross-sectional view which shows the state which mounted | wore the gear case with the insulator (gear cover).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle 11 Windshield 11a, 11b Wiping range 12 DR side wiper member 12a DR side wiper blade 12b DR side wiper arm 13 AS side wiper member 13a AS side wiper blade 13b AS side wiper arm 14 Wiper device 15 Wiper motor (motor)
16 Link mechanism 17a DR side pivot shaft 17b AS side pivot shaft 18 Fastening screw 20 Motor portion 21 Motor case 21a Bottom portion 22 Permanent magnet 23 Armature 24 Armature shaft 24a First worm (reduction gear)
24b Second worm (reduction gear)
25 Commutator 30 Gear part 31 Gear case 32 Worm wheel (reduction gear)
32a Output shaft 32b Gear teeth 33 First counter gear (reduction gear)
33a Small diameter gear 33b Large diameter gear 34 Second counter gear (reduction gear)
34a Small-diameter gear 34b Large-diameter gear 35 Holder case part 36 Holder terminal accommodating part 36a Support protrusion (positioning part)
36b Projection receiving part (positioning part)
36c concave groove (mounting guide)
37 cylindrical part 37a communication path 50 brush holder 51 holder body 51a bottom wall part 51b side wall part 51c through hole 52 holder terminal part (brush holder)
52a Protruding part 52b Convex part (mounting guide part)
52c Fitting part 53 Brush holder base (brush holder)
53a Brush 53b Through-hole 54 Brush-side conductive member 54a Terminal piece 60 Gear cover 70 Cover member (gear cover)
71 Bottom 72 Peripheral Wall 73 Fixing Claw 74 Gear Support 75 Sliding Contact Rib 76 Seal Groove 77 Connector Connection 80 Insulator (Gear Cover)
81 Body portion 82 Standing portion 82a Insertion port 82b Tapered wall portion 83 Cover side conductive member 83a Terminal piece 83b Female terminal 84 Guide leg portion (attached guide portion)
84a Leg piece 84b Tapered wall portion 85 Guide protrusion (attached guide portion)
86,87 Contact plate 88 Relay plate LRP Lower reverse position URP Upper reverse position

Claims (4)

A motor case that rotatably accommodates an armature having an armature shaft, a gear case that rotatably accommodates a reduction gear that reduces the rotation of the armature shaft, a gear cover that closes an opening of the gear case, the motor case, and the A motor provided with a brush holder provided between the gear case,
A commutator fixed to the armature shaft;
A brush held by the brush holder and in sliding contact with the commutator;
A brush-side conductive member provided on the brush holder, one end side of which is electrically connected to the brush and the other end side disposed in the gear case;
A cover side conductive member provided on the gear cover, having one end side electrically connected to an external terminal and the other end side electrically connected to the other end side of the brush side conductive member;
A mounting guide provided on at least one of the brush holder and the gear case for guiding mounting of the gear cover to the gear case;
A mounting guide provided on the gear cover and mounted on the mounting guide;
The motor characterized in that the other end side of the cover-side conductive member is electrically connected to the other end side of the brush-side conductive member by mounting the mounted guide portion to the mounting guide portion.   The motor according to claim 1, wherein the mounting guide portion is disposed close to the other end side of the brush side conductive member, and the mounted guide portion is disposed close to the other end side of the cover side conductive member. Motor.   3. The motor according to claim 1, wherein the gear case has a positioning portion that positions the brush holder with respect to the gear case.   The motor according to any one of claims 1 to 3, wherein the gear cover is formed from a cover member and an insulator fixed to the cover member, the cover-side conductive member is attached to the insulator, and the insulator is attached to the insulator. A motor characterized in that the mounted guide portion is formed.

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