JP2007274769A - Motor with reduction gear mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor with a reduction gear mechanism in which a conduction plate can be attached easily to an insulator without generating excessive material when the conduction plate is molded. <P>SOLUTION: A plurality of conduction plates 43 are formed with an identical width and attached such that the conduction plates 43 do not overlap on an insulator 40. Since the conduction plate 43 can be molded using a conductive roll material of a predetermined width, excessive portion of material does not occur and the yield can be improved. Furthermore, the work for attaching each conduction plate 43 to the insulator 40 is facilitated since the conduction plates 43 do not overlap on the insulator 40 in the vertical direction and thereby dimensions of the insulator 40 can be suppressed in the thickness direction and dimensions of a wiper motor can also be suppressed in the thicness direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention includes a motor case that rotatably accommodates an armature, and a gear case that accommodates a speed reduction mechanism that decelerates the rotation of the armature, and is particularly equipped with a speed reduction mechanism suitable for use in vehicle electrical equipment such as a wiper device. It relates to the motor.

  Conventionally, a motor with a speed reducing mechanism generates a large output with a small power to drive a driven object, and among them, a wiper that is mounted in a limited mounting space and requires a relatively large output. Various actuators have been adopted as electrical components for vehicles such as devices, power window devices, and sliding door opening and closing devices. A motor with a speed reduction mechanism used as an actuator for such a vehicle electrical component includes a motor case that rotatably accommodates an armature, and a gear case that accommodates a speed reduction mechanism that is connected to the motor case and decelerates the rotation of the armature. In addition, an insulator (insulating substrate) as an assembly plate provided with terminals (terminals), wiring, capacitors, choke coils, and the like is mounted on the bottom of the bottomed case cover that closes the gear case. .

As described above, as a motor with a speed reduction mechanism in which an insulator is mounted on the bottom of the case cover, for example, the motor described in Patent Document 1 is known, and the motor with a speed reduction mechanism described in Patent Document 1 is A unit plate as an insulator is fixedly provided in a housing cover as a case cover. On one side surface of the unit plate, a plurality of thin plate-like conduction plates constituting the wiring are mounted.
JP 2004-104886 A

  However, according to the motor with a speed reduction mechanism described in Patent Document 1 described above, the plurality of thin plate-like conduction plates attached to one side surface of the insulator are formed with different width dimensions, or branched in the middle. The conductive plate is not only complicated in shape, but is mounted three-dimensionally so as to overlap each other on the insulator. Therefore, when the conductive plate is press-molded and punched, an excess portion of the thin plate material is generated and the yield is poor, and when each conductive plate is attached to the insulator, each conductive plate is complicated in the vertical direction of the insulator. The installation work was complicated.

  The present invention has been made in view of the above circumstances, and the object thereof is to provide a reduction mechanism that can easily attach the conductive plate to the insulator without generating surplus material when the conductive plate is molded. It is to provide a motor.

  A motor with a speed reduction mechanism according to the present invention is a motor with a speed reduction mechanism including a motor case that rotatably accommodates an armature, and a gear case that is coupled to the motor case and decelerates the rotation of the armature. , A bottomed case cover for closing the gear case, an assembly plate attached to the bottom of the case cover, provided with electrical components, and attached to the assembly plate, one end of which is connected to the power supply side connector A plurality of conductive plates connected to the drive source side connector at the other end, and the conductive plates are formed to have the same width so that the conductive plates do not overlap each other on the assembly plate. It is characterized by.

  The motor with a speed reduction mechanism according to the present invention is characterized in that a through-hole penetrating both the assembly plate and the conduction plate is provided, and a foot portion of the electric component is attached to the through-hole.

  The motor with a speed reduction mechanism of the present invention is characterized in that a taper portion for guiding the foot portion is formed in a through hole in the assembly plate.

  The motor with a speed reduction mechanism of the present invention is characterized in that a recess is formed at the bottom of the case cover to avoid interference with the foot.

  The motor with a speed reduction mechanism according to the present invention is characterized in that the electrical component is arranged in a portion of the assembly plate that is not opposed to the speed reduction mechanism.

  According to the present invention, a plurality of conductive plates are formed to have the same width and mounted so that the conductive plates do not overlap each other on the assembly plate, so that the conductive plate is formed using a roll material having a predetermined width of conductivity. Therefore, it is possible to improve the yield without generating an excessive portion of the material. Further, since the conductive plates do not overlap with each other in the vertical direction on the assembly plate, it is easy to attach each conductive plate to the assembly plate.

  According to the present invention, since the through-hole penetrating both the assembly plate and the conduction plate is provided, and the foot part of the electrical component is attached to the through-hole, the electrical component is temporarily held by the through-hole to hold the electrical component. It can be easily installed. In addition, it is possible to mount the electrical component by standing upright in the vertical direction of the assembly plate. Therefore, it is possible to add the electrical component.

  According to the present invention, since the tapered portion that guides the foot portion is formed in the through hole in the assembly plate, it is easy to place the electrical component on the assembly plate.

  According to the present invention, since the hollow portion that avoids the interference with the foot portion is formed in the bottom portion of the case cover, it is possible to prevent the foot portions of the electrical parts from being short-circuited.

  According to the present invention, since the electrical component is arranged at the non-opposing portion of the assembly plate with respect to the speed reduction mechanism, a long electrical component having a predetermined dimension in the vertical direction of the assembly plate is mounted on the assembly plate. be able to.

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

  1 is a front view showing a wiper motor according to an embodiment of the present invention, FIG. 2 is a partially enlarged view showing the inside of a gear case in the wiper motor of FIG. 1, and FIG. 3 is a spur gear accommodated in the gear case of FIG. The perspective view of each is represented.

  The wiper motor 10 serving as a motor with a speed reduction mechanism is used as an actuator for a wiper device that secures the driver's field of view by wiping rain or droplets from a front vehicle that are not shown. The wiper motor 10 is provided in an engine room of a vehicle (not shown), and wipes a wiper arm provided via a link mechanism or the like within a predetermined wiping range on the windshield.

  The wiper motor 10 has an electric motor 11 and a gear case 12, which are connected to each other by screws 13. The electric motor 11 includes a yoke 14 as a motor case that forms an outer shell thereof. The yoke 14 is closed at one end side (right side in the figure) and opened at the other end side (left side in the figure) to form a bottomed cylinder. Is formed. An armature 15 is rotatably accommodated inside the yoke 14 as indicated by a broken line in the figure, and one end of the armature 15 is supported on the bottom of the yoke 14 via a bearing (not shown). A commutator (not shown) is integrally provided on the other end side of the armature 15, and a plurality of brushes 16 (two in the figure) have a predetermined elastic pressure, as indicated by broken lines in the figure. It comes in sliding contact. Further, worms 17a and 17b are integrally formed on the other end side of the armature 15 as shown in FIG. 2, and the worms 17a and 17b are respectively formed in a helical tooth forming direction (twisting direction). Are formed so as to have a reverse relationship.

  The gear case 12 is formed in a bottomed shape. Inside the gear case 12, as shown in FIG. 2, the worms 17a and 17b formed on the armature 15 are housed so as to protrude from the yoke 14 side (right side in the figure). A pair of worm wheels 18 and 19 and a spur gear 20 having a rotation center axis orthogonal to the rotation center axis of the armature 15 are accommodated. An output shaft 21 is integrally provided at the center of rotation of the spur gear 20, and the output shaft 21 extends through the bottom of the gear case 12 to the outside of the gear case 12. A link mechanism or the like for swinging a wiper arm (not shown) is connected to the end (lower side in FIG. 1) of the output shaft 21.

  A brush holder connector (drive source side connector) to which a later-described terminal box 51 (see FIG. 6) for driving the electric motor 11 by supplying current to the plurality of brushes 16 is connected to the yoke 14 side of the gear case 12. ) 22 is formed. A plurality of flat male terminals 22 a that are electrically connected to the plurality of brushes 16 are mounted on the brush holder connector 22. The brush holder connector 22 has a surrounding portion 22b so as to surround each flat male terminal 22a, and a notch 22c extending in the axial direction of the output shaft 21 is integrally formed with the surrounding portion 22b. Is formed.

  The pair of worm wheels 18 and 19 are accommodated in the gear case 12 so as to mesh with the worms 17a and 17b with the axis of the armature 15 interposed therebetween. Provided. Each pinion 18a, 19a meshes with the spur gear 20, and the rotational force of each worm wheel 18, 19 is transmitted to the spur gear 20 via each pinion 18a, 19a. Therefore, the rotation of the armature 15 is decelerated through the worm wheels 18 and 19, and the decelerated and increased torque is output to the output shaft 21 of the spur gear 20. Here, the speed reduction mechanism in the present invention is constituted by the worms 17a and 17b, the worm wheels 18 and 19 and the spur gear 20. In addition, sliding grease (not shown) is applied to the meshing portions a to d of the worms 17a and 17b, the worm wheels 18 and 19 and the spur gear 20, thereby smoothly operating the speed reduction mechanism. In addition, the wear is suppressed.

  As shown in FIG. 3, an annular groove 23 is formed on one side surface (upper side in the drawing) of the spur gear 20, and a conductive thin plate shape is formed at a predetermined position in the circumferential direction of the annular groove 23. A conductive member 24 made of a member is press-fitted and fixed. The conductive member 24 can rotate integrally with the spur gear 20. The conductive member 24 is formed in a substantially crescent shape by pressing and punching a thin plate-like member, and the conductive member 24 stands up from the bottom side of the annular groove 23 of the spur gear 20 in the upper side in the figure. A pair of contact members 24a and 24b having elasticity bent in this manner are integrally provided.

  4 is an enlarged view showing the inside of the case cover in the wiper motor of FIG. 1, FIG. 5 is a perspective view of the case cover of FIG. 4 viewed from the inside, and FIG. 6 is a perspective view of the insulator of FIG. FIG. 7 shows a front view of the insulator of FIG. 6 as seen from the back side.

  The opening side of the gear case 12 is closed by a case cover 30 as shown in FIG. 4, and the opening shape of the case cover 30 and the opening shape of the gear case 12 are substantially the same shape. . As a result, the gear case 12 is hermetically sealed by abutting and fixing the openings through a seal member (not shown). An insulator (insulating substrate) 40 as an assembly plate is attached to the bottom 31 of the case cover 30, and a plurality of capacitors 41, choke coils 42, and the like as electrical components are attached to the insulator 40 as a reduction mechanism. It is attached to a portion (non-opposing portion) that does not face the worm wheels 18 and 19 (broken circles in FIG. 4). These electrical components are electrically connected to a plurality of conductive plates 43 arranged along the front and back surfaces of the insulator 40, and constitute an electrical circuit formed on the insulator 40. ing.

  As shown in FIG. 5, the case cover 30 is formed in a bottomed shape, and the case cover 30 has a bottom portion 31 and a side wall portion 32 formed so as to surround the bottom portion 31. The bottom 31 is provided with a cylindrical protrusion 33 that positions the insulator 40 at a predetermined position of the case cover 30 and rotatably supports one side surface of the output shaft 21 of the spur gear 20. The bottom portion 31 is provided with support protrusions 34 a and 34 b that rotatably support the rotation center shaft on one side surface of each worm wheel 18 and 19 accommodated in the gear case 12. Furthermore, the bottom portion 31 includes a foot portion (connection terminal) of the capacitor 41 and the choke coil 42 provided in the insulator 40 attached to the case cover 30, and prevents a plurality of interferences between the case cover 30 and each electrical component. A recess 35 is provided.

  On the left side of the side wall 32 in the figure of the case cover 30 is a cylindrical shape in which the inside and outside of the case cover 30 communicate with each other, and an external connector (not shown) as a power supply side connector is detachably connected to the outside. The connector connecting portion 36 is integrally formed. The hollow portion 36 a of the connector connecting portion 36 extends outward through the side wall portion 32 in a direction perpendicular to the perpendicular to the bottom portion 31 of the case cover 30. And the power supply side terminal part 44 of the insulator 40 shown in FIG. 6 fits in the hollow part 36a of the connector connection part 36. As shown in FIG.

  On the right side of the side wall portion 32 of the case cover 30 in the figure, a pair of claw portions 38 are integrally formed as a holding portion for pressing the drive source side terminal portion 45 of the insulator 40 shown in FIG. . These claw portions 38 are formed in a substantially triangular pyramid shape, and are inclined protrusions that gradually bulge toward the inside of the case cover 30 toward the bottom portion 31 of the case cover 30. Further, a protrusion 39 is provided in the vicinity of the hollow portion 36 a of the side wall portion 32 substantially facing the claw portion 38 of the case cover 30.

  The insulator 40 is an insulating substrate made of a synthetic resin material such as plastic, and the outer shape of the insulator 40 does not cover the support protrusions 34 a and 34 b provided on the bottom 31 when mounted on the bottom 31 of the case cover 30. In this manner, the portions facing the support protrusions 34a and 34b are cut out (broken line circles in FIG. 4).

  As shown in FIGS. 6 and 7, the insulator 40 includes a power supply side terminal portion (one end side of the assembly plate) 44 provided with one end of a conductive plate group G composed of a plurality of conductive plates 43, and a spur gear 20. A facing portion 46 facing one side, an electrical component mounting portion 47 on which electrical components such as a capacitor 41 and a choke coil 42 are mounted, and a drive source side terminal portion (an assembly plate) on which the other end of the conduction plate group G is provided. The other end side) 45 is formed.

  The power supply side terminal portion 44 collectively supports one end of the conductive plate group G attached to the insulator 40 so as not to contact each other above the opposing portion 46 in the figure. A positioning restricting portion 48 is formed between the power supply side terminal portion 44 and the facing portion 46, and when the insulator 40 is attached to the case cover 30, the protrusion 40 and the positioning restricting portion 48 make the hollow of the insulator 40 hollow. Regulation in the direction of the portion 36a is performed. The width dimension of the power supply side terminal portion 44 is substantially the same as the width dimension of the hollow portion 36a of the connector connecting portion 36, whereby the power supply side terminal portion 44 is arranged at a predetermined position in the hollow portion 36a. Thus, rattling of the power supply side terminal portion 44 in the hollow portion 36a is suppressed.

  A pair of conductive plates 49 divided in the circumferential direction constituting the conductive plate group G are attached to the facing portion 46, and conductive members fixed to the spur gear 20 are attached to these conductive plates 49. 24 are opposed to each other, and the pair of contact members 24a and 24b in the conductive member 24 are in sliding contact with each other. Further, contact grease (not shown) is applied to the surface of each conductive plate 49 to prevent poor contact with each contact member 24a, 24b and electrical leakage. The contact state with the contact members 24a and 24b is kept good.

  Each conductive plate 49 is short-circuited when the contact members 24a and 24b come into contact with each other at substantially the same time, and a controller (not shown) receives an OFF signal from a wiper switch (not shown) and the short-circuit. By detecting this, the wiper arm is stopped at a predetermined stop position. However, when it is necessary to change the stop position of the wiper arm depending on the vehicle type on which the wiper motor 10 is mounted, for example, the conductive member 24 having a different shape is fixed to the annular groove 23 of the spur gear 20 or the output shaft The mounting fixing angle of the arms (both not shown) fixed to the 21 taper serrations may be changed.

  FIG. 8 is a partial sectional view showing a state in which the insulator and the spur gear in the wiper motor of FIG. 1 are assembled.

  An annular wall portion 50 is integrally formed on the facing portion 46 so as to surround each conductive plate 49 from the radial direction, and the annular wall portion 50 includes the insulator 40, the spur gear 20, and the like as shown in FIG. 8. In the assembled state, the spur gear 20 extends into the annular groove 23 toward the bottom of the annular groove 23 in the spur gear 20. The annular wall portion 50 is positioned between the meshing portions a to d in the gear case 12 and the sliding contact portions of the conductive plates 49 and the contact members 24 a and 24 b by entering the annular groove 23. The engagement portion side and the sliding contact portion side are separated in the radial direction (horizontal direction in the figure). Thereby, the annular wall part 50 suppresses the mixing of the sliding grease on the meshing parts a to d side and the contact grease on the sliding contact part side when the wiper motor 10 is operated, and suppresses the performance degradation of each grease. Playing a role.

  Here, as shown in FIG. 6, a notch groove 50 a across which one conductive plate 49 crosses is formed on the side of the power supply side terminal portion 44 of the annular wall portion 50, and this notch groove 50 a has meshing portions a to d. Therefore, the grease does not mix through the notch groove 50a. That is, the notch groove 50a may be provided with a notch groove in a portion where the grease of the annular wall portion 50 is difficult to come and go. In this case, a conductive plate straddling the inside and the outside of the annular wall portion 50, etc. Can be mounted through the notch groove, so that the trouble of bending the conductive plate or the like can be saved.

  9 is an enlarged partial perspective view showing an electrical component mounting portion of the insulator in FIG. 6, and FIG. 10 is a partially enlarged sectional view taken along line AA in FIG.

  As shown in FIGS. 6 and 9, the electrical component mounting portion 47 is mounted so that the two capacitors 41 stand up and the two choke coils 42 lie down. The insulator 40 is mounted in the same mounting form.

  For example, as described with reference to the choke coil 42 as a mounting form of the electric component to the insulator 40, as shown in FIG. 10, the choke coil 42 has a through hole in which a foot portion 42a is formed in the electric component mounting portion 47. The electrical component mounting portion 47 is mounted by passing through the through hole 43a of the conduction plate 43 provided so as to pass through the 47a and along the back surface of the insulator 40. And the leg part 42a of the penetrated choke coil 42 is electrically connected to the conduction plate 43 by applying an adhesive means such as soldering. Note that the electrical components such as the capacitor 41 and the choke coil 42 are disposed in a space without the speed reduction mechanism of the gear case 12.

  Further, a taper portion 47b for guiding the tip end side (lower side in the drawing) of the foot portion 42a of the choke coil 42 is formed on the upper side of the through hole 47a in the electric component mounting portion 47 in the drawing. 47b facilitates the mounting of the choke coil 42 to the insulator 40. A leg portion 42 a of the choke coil 42 protrudes with a certain length to the lower side of the insulator 40 in the figure, and enters a hollow portion 35 formed in the bottom portion 31 of the case cover 30.

  The drive source side terminal portion 45 collectively supports the other ends of the conductive plate group G so as not to contact each other, and the other end of the conductive plate group G is an insulating material such as a synthetic resin as shown in FIG. It is surrounded by the terminal box 51 which consists of. The terminal box 51 is integrally provided with a guide protrusion 51b whose upper end is a tapered portion 51a so as to extend in the vertical direction in the figure. The guide projection 51b guides the connection between the terminal box 51 and the brush holder connector 22 by cooperating with the notch 22c of the brush holder connector 22 shown in FIG.

  Further, the drive source side terminal portion 45 is formed with a pair of assembly guide portions 52 having an outer shape substantially the same as the inner shape of the side wall portion 32 in the case cover 30, and these assembly guide portions 52. Are formed inwardly so as to be elastically deformable. Each assembly guide portion 52 is provided corresponding to each claw portion 38 formed on the side wall portion 32 of the case cover 30. When the insulator 40 is attached to the bottom portion 31 of the case cover 30, The ridgeline of the portion 38 is in sliding contact with elastic deformation.

  FIGS. 11A and 11B are perspective views showing the conductive plate group removed from the insulator.

  Each conductive plate 43 constituting the conductive plate group G disposed on the front and back surfaces of the insulator 40 is formed to have substantially the same width as shown in FIG. 11A, and each conductive plate 43 is formed in a roll shape. The conductive plate spring material having a predetermined width is cut into a predetermined length and is three-dimensionally bent by forming to match the surface shape of the insulator 40 by pressing or the like. The left side of the conduction plate group G in the drawing forms a plurality of flat male terminals 43b arranged in the power supply side terminal portion 44, and the right side of the conduction plate group G in the drawing is the terminal of the drive source side terminal portion 45. A plurality of flat male terminals 43 c arranged in the box 51 are formed.

  A pair of conductive plates 49 are connected to the conductive plate 43 at a portion corresponding to the facing portion 46 of the conductive plate group G by connection means such as projection welding. One end side of a plurality of flat female-female terminals 43d is attached to each flat male terminal 43c of the conductive plate group G, and these flat female-female terminals 43d are also arranged in the terminal box 51. It has become so. A plurality of flat male terminals 22a of the brush holder connector 22 shown in FIG. 2 are attached to the other end of each flat female-female terminal 43d.

  Here, each flat female-female terminal 43d can be elastically deformed in a direction perpendicular to the mounting direction of the flat male terminals 22a and 43c, and the flat male terminals 22a and 43c have springiness. Has come to support. Therefore, each terminal is elastically fitted with a predetermined fitting allowance to allow a positional deviation or a dimensional error between the terminals. Further, since each flat female-female terminal 43d is provided, it is not necessary to form either one of the flat male terminals 22a and 43c into a female terminal. Therefore, the conductive plate 43 can be simply bent and processed. It becomes easy.

  As shown in FIG. 7, the conductive plates 43 formed in this way are vertically overlapped at predetermined positions on the front and back surfaces of the insulator 40 by a plurality of holding claws 53 formed integrally with the insulator 40. In addition, the conductive plates 43 are positioned so as not to contact with each other, and each of the positioned conductive plates 43 is mounted by performing a fixing process such as heat caulking.

  Next, the assembly procedure of the wiper motor 10 will be described with reference to FIGS. FIG. 12 is a diagram showing the procedure for assembling the insulator to the case cover, and FIGS. 13A, 13B and 13C are diagrams showing the deformation state of the assembly guide portion when the insulator is mounted. .

  First, as shown in FIG. 6, an insulator 40 in which each electrical component is mounted and sub-assembled is prepared. Next, as shown in FIG. 12, the power supply side terminal portion 44 of the insulator 40 is inclined so as to face the lower side in the drawing so that each electrical component faces the upper side in the drawing so as to face the opening side of the case cover 30. . Then, the power supply side terminal portion 44 is inserted and fitted into the hollow portion 36a of the connector connecting portion 36 provided on the side wall portion 32 from the inside of the case cover 30 as indicated by an arrow in FIG.

  Thereafter, the pair of assembly guide portions 52 provided on the drive source side terminal portion 45 are opposed to the pair of claw portions 38 provided on the case cover 30 from the upper side in the drawing, and in this state, the insulator 40 is While the inclination angle with respect to the case cover 30 is made gentle as shown by an arrow in FIG. 12, each assembly guide portion 52 is pressed with a predetermined pressing force from above in the figure as shown by an arrow in FIG.

  Then, from the state shown in FIG. 13A, as shown by the arrow in FIG. 13B, each assembly guide portion 52 is elastically deformed inward by each claw portion 38, and on the ridge line of each claw portion 38. Make sliding contact. As each assembly guide portion 52 slides on the ridge line of each claw portion 38, the insulator 40 approaches the bottom portion 31 while being positioned at a predetermined position with respect to the case cover 30. At the same time, the insertion of the power supply side terminal portion 44 into the hollow portion 36 a is continued, and the positioning restriction portion 48 formed on the side surface of the power supply side terminal portion 44 is brought into contact with the protrusion 39 of the case cover 30.

  As shown in FIG. 13 (c), the respective assembly guide portions 52 are continuously pressed. As a result, each assembly guide portion 52 gets over each claw portion 38 as shown in FIG. 13 (c). As shown, the elastic deformation of each assembly guide portion 52 is restored, and the outer peripheral side of each assembly guide portion 52 is in close contact with the side wall portion 32 of the case cover 30. In this way, the insulator 40 is attached to the case cover 30 to complete the sub-assembly of the case cover 30 as shown in FIG.

  After that, the opening side of the completed sub-assembled case cover 30 is made to face the opening side of the gear case 12 in which the speed reduction mechanism shown in FIG. At this time, the terminal box 51 on the insulator 40 side and the brush holder connector 22 on the gear case 12 side are opposed to each other in the vertical direction. Then, by lowering the case cover 30 with respect to the gear case 12, first, the brush holder connector shown in FIG. 2 is connected to the other end side of each flat female-female terminal 43d provided in the terminal box 51. The front end side of each flat male terminal 22a of 22 is mounted | worn.

  After that, the case cover 30 is further pressed and lowered with respect to the gear case 12 to complete the mounting of the flat male terminals 22a to the flat female-female terminals 43d, and the case cover 30 to the gear case 12 is completed. Installation is complete. And the assembly of the wiper motor 10 is completed by fixing each other by fixing means such as a fastening screw (not shown).

  As described above in detail, according to the wiper motor 10 in one embodiment of the present invention, the plurality of conductive plates 43 are formed to have the same width, and are mounted so that the conductive plates 43 do not overlap each other on the insulator 40. The conductive plate 43 can be formed using a roll material having conductivity of a predetermined width, and therefore, the yield can be improved without generating an excessive portion of the material. In addition, since the conductive plates 43 do not overlap each other on the insulator 40 in the vertical direction, the mounting work of each conductive plate 43 to the insulator 40 can be facilitated, and the thickness direction dimension of the insulator 40 can be suppressed. The dimension in the thickness direction of the wiper motor 10 can be suppressed.

  Furthermore, according to the wiper motor 10 in one embodiment of the present invention, the through holes 47a and 43a that penetrate both the insulator 40 and the conduction plate 43 are provided, and the foot portions of the electrical components are mounted in the through holes 47a and 43a. Therefore, the electrical components can be temporarily mounted by the through holes 47a and 43a, and the electrical components can be easily mounted. Further, it is possible to mount the electrical components while standing upright in the vertical direction of the insulator 40. Therefore, it is possible to increase the number of electrical components.

  In addition, according to the wiper motor 10 in the embodiment of the present invention, the tapered portion 47b for guiding the foot portion is formed in the through hole 47a in the insulator 40, so that it is easy to place the electrical component on the insulator 40. .

  Furthermore, according to the wiper motor 10 in one embodiment of the present invention, since the recess portion 35 that avoids interference with the foot portion is formed in the bottom portion 31 of the case cover 30, the foot portions of the electrical components are short-circuited. This can be prevented.

  Moreover, according to the wiper motor 10 in one embodiment of the present invention, since the electrical component is disposed in the non-opposing portion of the insulator 40 with respect to the speed reduction mechanism, the long electrical component having a predetermined dimension in the vertical direction of the insulator 40 Can be attached to the insulator 40.

  Next, another embodiment of the present invention will be described with reference to FIGS. 14 (a) and 14 (b) are views showing a spur gear and a contact member according to another embodiment, and FIG. 15 is a part showing a state where the spur gear and the contact member of FIG. 14 are assembled to an insulator. Each of the cross-sectional views is shown. In addition, the same code | symbol is attached | subjected to the member which has the same function as embodiment mentioned above, and the description is abbreviate | omitted.

  In the wiper motor 10 according to the above-described embodiment, the conductive member 24 is fixed to the spur gear 20 so that the contact members 24a and 24b rotate in sliding contact with the insulator 40. The embodiment is different in that the conductive member 24 having the contact members 24 a and 24 b is rotatably attached to the case cover 30.

  As shown in FIGS. 14A and 14B, the conductive member 24 is fixed to the upper side of the flange portion 62 of the hat-like member 60 in the figure by a fixing process such as heat caulking. The hat-shaped member 60 has a bottomed cylindrical main body 61 and a flange portion 62 formed integrally with the cylindrical main body 61. The cylindrical main body 61 is provided with a perforation 61a at the bottom thereof, and a cylindrical projection 33 provided on the bottom 31 of the case cover 30 passes through the perforation 61a as shown in FIG. ing. The hat-shaped member 60 is rotatably attached to the case cover 30 by a push nut 33a after the insulator 40 is mounted on the bottom 31 of the case cover 30. Therefore, the conductive member 24 fixed to the flange portion 62 of the hat-shaped member 60 is attached to the case cover 30 so as to be rotatable.

  The flange portion 62 of the hat-shaped member 60 is provided with a notch 62a as a recess partially cut away in the circumferential direction, and the annular groove 23 of the spur gear 20 faces upward in the figure. A protrusion 23a as a convex portion is integrally provided so as to extend. When the spur gear 20 is assembled to the hat-shaped member 60, the protrusion 23a enters the inside of the notch 62a of the flange 62 and the corner 62b of the notch 62a as shown by the broken line in FIG. Can be contacted.

  That is, the engagement of the notch 62a as the concave portion and the protrusion 23a as the convex portion causes the conductive member 24 having the contact members 24a and 24b and the spur gear 20 to engage with each other. The hat-shaped member 60 rotates with the rotation of 20. However, contrary to the above, the notched portion 62a as the concave portion provided in the flange portion 62 is omitted, and instead, a projection as the convex portion is formed in the flange portion 62 and the projection 23a formed in the spur gear 20 May be omitted, and a groove or hole as a recess may be provided instead.

  In other embodiments of the present invention configured as described above, the same operational effects as those of the above-described embodiment can be obtained. In the other embodiments, in addition, since the conductive member 24 having the contact members 24a and 24b can be incorporated in advance as a sub-assembly of the case cover 30, the energized state as described above in the state of the sub-assembly. The effect of being able to inspect (whether or not to short-circuit) or the like can be achieved.

  It goes without saying that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, in each of the above embodiments, the wiper motor as a motor with a speed reduction mechanism is applied to a front wiper device for wiping the front windshield, but the present invention is not limited to this, and the rear windshield is not limited to this. The present invention can also be applied to a rear wiper device for wiping.

  In each of the above-described embodiments, a motor that is used in a wiper device as a motor with a speed reduction mechanism is shown. However, the present invention is not limited to this, and a speed reduction mechanism such as a power window device or a slide door opening / closing device It can also be used for other motors having

  Further, in each of the above-described embodiments, the motor with a speed reduction mechanism is shown as a motor with a speed reduction mechanism. However, the present invention is not limited to this, and is also applied to a brushless motor having a speed reduction mechanism. be able to.

It is a front view which shows the wiper motor which is one embodiment of this invention. It is the elements on larger scale which show the inside of the gear case in the wiper motor of FIG. It is a perspective view of the spur gear accommodated in the gear case of FIG. It is an enlarged view which shows the inside of the case cover in the wiper motor of FIG. It is the perspective view which looked at the case cover single-piece | unit of FIG. 4 from the inner side. It is a perspective view which shows the insulator single-piece | unit of FIG. It is the front view which looked at the insulator of Drawing 6 from the back. It is a fragmentary sectional view which shows the state which assembled | attached the insulator and spur gear in the wiper motor of FIG. It is a fragmentary perspective view which expands and shows the electrical component mounting part of the insulator in FIG. FIG. 10 is a partial enlarged cross-sectional view taken along line AA in FIG. 9. (A), (b) is a perspective view which shows the conduction | electrical_connection plate group removed from the insulator. It is a figure which shows the assembly | attachment procedure of the insulator to a case cover. (A), (b), (c) is a figure which shows the deformation | transformation state of the assembly guide part at the time of insulator mounting | wearing. (A), (b) is a figure which shows the spur gear and contact member which concern on other embodiment. It is a fragmentary sectional view which shows the state which assembled | attached the spur gear and contact member of FIG. 14 to the insulator.

Explanation of symbols

10 Wiper motor (motor with reduction mechanism)
11 Electric Motor 12 Gear Case 13 Screw 14 Yoke (Motor Case)
15 Armature 16 Brush 17a, 17b Worm (deceleration mechanism)
18, 19 Worm wheel (deceleration mechanism)
18a, 19a Pinion 20 Spur gear (reduction mechanism)
DESCRIPTION OF SYMBOLS 21 Output shaft 22 Brush holder connector 22a, 43b, 43c Flat type male terminal 22b Enclosure 22c Notch 23 Annular groove 23a Protrusion 24 Conductive member 24a, 24b Contact member 30 Case cover 31 Bottom 32 Side wall (side wall)
33 Cylindrical protrusion 33a Push nut 34a, 34b Support protrusion 35 Recessed part 36 Connector connection part 36a Hollow part 38 Claw part (holding part, inclined protrusion)
39 Protrusion 40 Insulator (assembly plate)
41 Capacitors (electrical parts)
42 Choke coil (electrical parts)
42a Foot 43 Conducting plate 43a Through hole 43d Flat female-female terminal 44 Power supply side terminal (one end of assembly plate)
45 Drive source side terminal (the other end of the assembly plate)
46 Opposing part 47 Electrical component mounting part 47a Through hole 47b Taper part 48 Positioning restricting part (protrusion part)
49 conductive plate 50 annular wall (wall)
50a Notch groove 51 Terminal box 51a Tapered portion 51b Guide convex portion 52 Assembly guide portion 53 Holding claw 60 Hat-shaped member 61 Tubular body 61a Perforation 62 Flange portion 62a Notch portion 62b Corner portion G Conducting plate group (conducting plate)
a to d meshing part

Claims (5)

A motor with a speed reduction mechanism, comprising: a motor case that rotatably accommodates an armature; and a gear case that is coupled to the motor case and decelerates the rotation of the armature;
A bottomed case cover for closing the gear case;
An assembly plate mounted on the bottom of the case cover and provided with electrical components;
A plurality of conductive plates mounted on the assembly plate, one end of which is connected to the power source side connector and the other end is connected to the drive source side connector;
A motor with a speed reduction mechanism, wherein the conductive plates are formed to have the same width and are mounted so that the conductive plates do not overlap with each other on the assembly plate.   The motor with a speed reduction mechanism according to claim 1, wherein a through-hole penetrating both the assembly plate and the conduction plate is provided, and a foot portion of the electric component is attached to the through-hole. With motor.   The motor with a speed reduction mechanism according to claim 2, wherein a taper portion for guiding the foot portion is formed in a through hole in the assembly plate.   4. The motor with a speed reduction mechanism according to claim 2, wherein a recess is formed at the bottom of the case cover so as to avoid interference with the foot.   5. The motor with a speed reduction mechanism according to claim 1, wherein the electric component is disposed in a portion of the assembly plate that is not opposed to the speed reduction mechanism.

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