JP2019037114A - motor - Google Patents

Abstract

To provide a motor having a structure capable of easily and reliably making an electrical connection between a wiring member and a circuit board.SOLUTION: A reduction unit 20 of a motor M has a configuration in which a circuit board 40 is disposed on a speed reduction mechanism 23 housed in a gear housing 21 (with a grease cover 30 interposed therebetween) and fixed to the gear housing 21, and a gear cover 50 is fixed to the gear housing 21 so as to cover the circuit board 40. A connection portion 17b of a conductive terminal 17 on a motor unit 10 side is located on the opposite side (front side) of the circuit board 40 to the speed reduction mechanism 23 side, and the conductive terminal 17 and the circuit board 40 are electrically connected. That is, the connection portion 17b of the conductive terminal 17 is located on the opposite side of the circuit board 40 to the speed reduction mechanism 23 side and exposed to the front side, so that the connection portion 17b of the conductive terminal 17 can be connected to the circuit board 40 in a state where the circuit board 40 is fixed to the gear housing 21, and connection confirmation by visual observation is also possible.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a motor that integrally accommodates a speed reduction mechanism and a circuit board.

  In a motor with a speed reducer in which a motor part and a speed reduction part are integrally assembled, a worm and a worm wheel are housed as a speed reduction mechanism in a housing recess of a gear housing constituting the speed reduction part, and the motor (motor part) There is a circuit board in which a drive circuit or the like is integrated and accommodated together with a speed reduction mechanism (see, for example, Patent Document 1).

JP 2017-51064 A

  By the way, when assembling the motor, electrical connection between a circuit board and a motor side wiring member such as a conductive terminal extending from the motor portion or a connector side wiring member such as a conductive terminal extending from a connector portion provided in a speed reduction portion (gear housing). However, it is desired to easily and reliably connect various wiring members to the circuit board.

  An object of the present invention is to provide a motor having a structure that allows easy and reliable electrical connection between a wiring member and a circuit board.

  A motor that solves the above-described problem is a motor unit and a speed reduction unit that are assembled together, and the rotation of the rotating shaft that is driven by the motor unit is output by being decelerated by the speed reduction mechanism of the speed reduction unit, The speed reduction part is a motor in which a circuit board constituting a drive circuit for driving the motor part is integrally housed in a housing member together with the speed reduction mechanism, and the speed reduction part includes a gear housing and a gear cover as the housing member. The circuit board is disposed on the speed reduction mechanism housed in the gear housing and fixed to the gear housing, and the gear cover is fixed to the gear housing so as to cover the circuit board. The motor side wiring member extending from the motor portion and the circuit board are configured such that at least the end of the motor side wiring member is in front. The said speed reduction mechanism side of the circuit board to each other so as to be positioned on the opposite side are electrically connected.

  According to the above aspect, in the configuration in which the circuit board is disposed on the speed reduction mechanism housed in the gear housing and fixed to the gear housing, and the gear cover is fixed to the gear housing so as to cover the circuit board, the motor side wiring The motor side wiring member and the circuit board are electrically connected such that at least the end of the member is positioned on the side (front side) opposite to the speed reduction mechanism side of the circuit board. That is, in the state where the circuit board is fixed to the gear housing, the end part which is the connection part with the circuit board in the motor side wiring member is positioned at least on the side opposite to the speed reduction mechanism side in the circuit board and exposed to the front side. It is possible to connect the end of the motor side wiring member to the circuit board or to visually confirm the connection of the motor side wiring member. As a result, the motor side wiring member and the circuit board can be easily and reliably electrically connected.

  In the above motor, the connector part formed separately from the gear housing and the gear cover is fixed to the gear housing on the side where the circuit board is fixed, and extends from the connector part. The wiring member and the circuit board are electrically connected.

  According to the above aspect, the connector portion is configured separately from the gear housing and the gear cover, and is fixed to the gear housing on the side to which the circuit board is fixed, so that the connector side wiring member and the circuit board are electrically connected. Connected. That is, by making the connector part a separate part, it is possible to expect effects such as a higher degree of freedom in the shape and material of the gear housing and gear cover.

  In the motor, the connector-side wiring member and the circuit board are electrically connected to each other so that at least an end of the connector-side wiring member is located on the side opposite to the speed reduction mechanism side of the circuit board. It is connected to the.

  According to the above aspect, the end portion, which is the connection portion with the circuit board in the connector side wiring member, is located at least on the side opposite to the speed reduction mechanism side in the circuit board and exposed to the front side, whereby the circuit board is mounted on the gear housing. It is possible to connect the end of the connector side wiring member to the circuit board in a fixed state, or to confirm the connection of the connector side wiring member. As a result, the electrical connection between the connector side wiring member and the circuit board can be easily and reliably performed.

  Further, in the motor, the speed reduction unit has a structure in which a space on the speed reduction mechanism side and a space on the circuit board side are partitioned by a partition member, and the partition member is the circuit board sandwiching itself. A guide portion that guides a connection portion of at least one of the motor side wiring member and the connector side wiring member that extends from the opposite side to the circuit board is provided.

  According to the above aspect, the space on the speed reduction mechanism side in the housing member of the speed reduction portion and the space on the circuit board side are partitioned by the partition member, and prevention of scattering of foreign matters from the speed reduction mechanism side to the circuit board side is achieved. In the structure, the connection portion of the wiring member extending from the opposite side of the circuit board sandwiching the partition member itself is guided by a guide portion provided on the partition member. As a result, it is possible to correct the positional deviation and the inclination of the connecting portion of the wiring member, and it is possible to easily and reliably perform the electrical connection with the circuit board.

In the motor, the partition member has a substantially plate shape and is configured such that the thickness of the guide portion is larger than the plate thickness of the main partition portion.
According to the above aspect, since the thickness of the guide portion is larger than the plate thickness of the main partition portion of the partition member, the length of the portion that guides the connection portion of the wiring member can be set longer, and the connection portion of the wiring member can be further increased. It is possible to reliably guide. In addition, in order to increase the thickness of the partition member only in the necessary locations, consideration is given to suppressing an increase in the weight of the partition member as much as possible.

  In the motor, the guide portion of the partition member has a guide hole through which the connection portion is inserted, and the guide hole has a taper portion in which an opening on the insertion side of the connection portion is expanded. .

  According to the above aspect, since the guide hole that guides through the connection portion of the wiring member is a tapered portion in which the opening on the insertion side of the connection portion is widened, the guide hole is a connection portion that is slightly misaligned or inclined. However, it is easy to insert, and it is possible to more reliably correct misalignment and inclination.

  In the motor, the speed reduction mechanism includes a worm provided on the rotation shaft, a worm wheel meshing with the worm, and an output shaft that can rotate integrally with the worm wheel, and the connector portion includes the rotation A part or all of the connector portion is disposed between a first axis that is an axis of the worm shaft and a second axis that is orthogonal to the axis of the output shaft and parallel to the first axis.

  According to the above aspect, the space between the first axis that is the axis of the worm of the rotating shaft and the second axis that is orthogonal to the axis of the output shaft that rotates integrally with the worm wheel and is parallel to the first axis is worm. Since a dead space is formed on the lateral side of the meshing portion with the worm wheel, a configuration in which a part or all of the connector portion is arranged in the space can contribute to the reduction of the speed reduction portion and thus the motor.

  In the motor, the circuit board is directly abutted against the base portion of the gear housing and fixed with a screw, and the circuit board is grounded with respect to the gear housing by contact with the screw. Has been.

  According to the above aspect, the circuit board is directly abutted against the pedestal portion of the gear housing and fixed by the screw, and is grounded to the gear housing by contact with the screw. No grounding work is required.

  According to the motor of the present invention, the electrical connection between the wiring member and the circuit board can be easily and reliably performed.

It is a perspective view which shows the state after the assembly | attachment of the motor in one Embodiment. It is a perspective view which shows the state which decomposed | disassembled the main components of the motor. It is a perspective view which shows the state which fixed the motor part. It is a perspective view which shows the state which has arrange | positioned the grease cover. It is a perspective view which shows the state which fixed the circuit board. It is a perspective view for demonstrating the grounding structure of a circuit board. It is sectional drawing for demonstrating the assembly | attachment aspect of the electroconductive terminal (connector side wiring member) extended from a connector part, (a) is a figure which shows the state after an assembly | attachment, (b) shows the state before an assembly | attachment. FIG. It is sectional drawing for demonstrating the assembly | attachment aspect of the electroconductive terminal (motor side wiring member) extended from a motor part, (a) is a figure which shows the state after an assembly | attachment, (b) shows the state before an assembly | attachment. FIG. It is a perspective view for demonstrating arrangement | positioning of the connector part in another example.

Hereinafter, an embodiment of the motor will be described.
A motor M of the present embodiment shown in FIG. 1 is used as a drive source of a vehicle wiper device, for example, and is configured by a motor with a speed reducer in which a motor unit 10 and a speed reduction unit 20 are assembled together. Yes.

  As shown in FIG. 2, the motor unit 10 is configured by a brushless motor in the present embodiment, and is an annular stator 12 fixed to the inner peripheral surface of a metal motor housing 11 having a bottomed cylindrical shape. It has. The stator 12 generates a rotating magnetic field based on power feeding to the three-phase winding wound on itself, and rotates the rotating shaft 13 of the rotor disposed inside. The motor unit 10 (motor housing 11) is fixed to the gear housing 21 of the speed reduction unit 20 with screws 14.

  Power supply to the three-phase winding of the stator 12 is performed using the connection component 15. The connecting component 15 is formed by insert molding or assembling three conductive terminals 17 on a resin holder 16 and has a substantially elongated rectangular parallelepiped shape. In the connection component 15, each base end connection portion 17 a of each of the conductive terminals 17 is electrically connected to the winding of the stator 12, and can be held integrally with the motor unit 10, for example. The connecting component 15 is arranged so that its longitudinal direction is along the axial direction of the motor unit 10, each tip connecting portion 17 b of each conductive terminal 17 is directed upward, and each tip connecting portion 17 b is They are arranged at equal intervals in the axial direction.

  The speed reduction part 20 includes a metal gear housing 21 having a flat shape. The gear housing 21 has an accommodation recess 21 a for accommodating a speed reduction mechanism 23 using a worm 13 a and a worm wheel 22 that are integrally provided on the rotating shaft 13 of the motor unit 10. The gear housing 21 has a motor fixing portion 21b for fixing the motor portion 10 (motor housing 11), and the inner opening 21c of the motor fixing portion 21b communicates with the housing recess 21a. When the motor unit 10 is fixed to the motor fixing unit 21b, the rotating shaft 13 extending from the motor unit 10 is inserted into the receiving recess 21a from the inner opening 21c of the motor fixing unit 21b, and the worm 13a provided on the rotating shaft 13 is stored. The worm wheel 22 rotatably accommodated in the recess 21a meshes. The worm wheel 22 is connected so as to rotate integrally with the output shaft 24 of the motor M protruding to the outside on the lower surface side of the gear housing 21, and the rotation of the rotating shaft 13 driven by the motor unit 10 causes the worm 13 a and the worm wheel to rotate. The vehicle is decelerated by the wheel 22 and is output from the output shaft 24 to the outside.

  Moreover, when the motor part 10 is fixed to the motor fixing part 21b, the connection component 15 extended from the motor part 10 is similarly inserted in the accommodation recessed part 21a from the inner side opening 21c. Each tip connection portion 17b of the connection component 15 (each conductive terminal 17) faces the opening side of the upper housing recess 21a and is electrically connected to the circuit board 40 (details will be described later).

  Between the rotating shaft 13 (worm 13a) and the connection component 15 in the accommodation recessed part 21a, the heat radiating convex part 21d is provided. The heat radiating convex portion 21d is in contact with a driving portion 40a1 provided with a semiconductor switching element or the like on the circuit board 40 to be described later, and absorbs heat generated by the driving portion 40a1 which is a main heat generating portion on the circuit board 40. . The heat absorbed by the heat radiating convex portion 21 d is radiated mainly from the entire outer surface of the gear housing 21. The heat radiating convex portion 21d also functions as a wall that partitions each other by being provided between the rotating shaft 13 (worm 13a) and the connecting component 15 (conductive terminal 17) (see FIG. 3).

  A connector portion 25 that is separate from the gear housing 21 is mounted on the opposite side of the motor portion 10 in the axial direction from the motor fixing portion 21b. The connector portion 25 is formed by insert-molding five conductive terminals 27 into a resin connector body 26, and has a connection port 26a for connection to an external connector (not shown). The connector portion 25 is fixed to the lower surface side of the gear housing 21 with a screw 28 so that the opening direction of its own connection port 26a faces the opposite side of the motor fixing portion 21b in the axial direction of the motor portion 10.

  In the connector portion 25, each distal end connection portion 27a of each conductive terminal 27 protrudes along the opening direction of the connection port 26a (the axial direction of the motor portion 10), and each proximal end connection portion 27b faces upward in the connection port 26a. It is bent like this. Correspondingly, the gear housing 21 is provided with an insertion window 21e penetrating in the vertical direction at a position adjacent to the accommodation recess 21a, and each base end connection portion 27b of each conductive terminal 27 facing upward. Protrudes upward by insertion of the insertion window 21e and is electrically connected to the circuit board 40 (details will be described later).

  As shown in FIGS. 3 and 4, a resin-made grease cover 30 having a substantially rectangular plate shape is attached to the opening side of the housing recess 21 a of the gear housing 21. The grease cover 30 mainly closes the opening of the housing recess 21a in a state where the worm wheel 22 is housed, and is also located on the insertion window 21e provided in parallel with the housing recess 21a. Further, as shown in FIGS. 4 and 5, a substantially rectangular plate-like circuit board 40 is mounted on the upper surface 30 a side of the grease cover 30.

  Various electronic components (not shown) including semiconductor switching elements and the like are mounted on the circuit board 40, and a drive unit 40a1, a control unit 40a2, and the like are configured as a drive circuit for the motor M (motor unit 10). On the circuit board 40, a connection hole 40d, which will be described later, for connecting to the connection component 15 (conductive terminal 17) on the motor unit 10, a drive unit 40a1 including a semiconductor switching element, and a control unit that controls driving of the drive unit 40a1. 40a2 are arranged side by side. In other words, the drive part 40a1 is disposed between the connection hole 40d and the control part 40a2, and is located on the heat radiation convex part 21d of the gear housing 21. The circuit board 40 is fixed with screws 41 to a pair of pedestal portions 21 f provided in the gear housing 21.

  Here, as shown in FIGS. 4 and 6, the grease cover 30 is provided with a notch portion 31 for avoiding (not interfering with) each pedestal portion 21 f. That is, the circuit board 40 and each pedestal portion 21f of the gear housing 21 are fixed so as to contact each other directly without sandwiching the grease cover 30 therebetween. Further, as shown in FIG. 6, a ground pattern portion 40b is provided at a contact portion with the screw 41 on the circuit board 40, and the circuit board 40 to be fixed (contacted) by the screw 41 has the ground pattern portion. It is grounded with respect to the gear housing 21 which becomes vehicle body grounding via 40b, the screw | thread 41, and the base part 21f.

  As shown in FIGS. 3 to 5, the grease cover 30 is configured such that the accommodation recess 21 a is closed on the lower surface 30 b side, and the space between the accommodation recess 21 a side (the speed reduction mechanism 23 side) and the circuit board 40 side is partitioned. ing. That is, the grease cover 30 functions as a partition member that partitions the speed reduction mechanism 23 side and the circuit board 40 side, so that the foreign matter including grease applied around the meshing portion of the worm wheel 22 and the worm 13a of the speed reduction mechanism 23 is provided. In particular, the scattering of (not shown) to the circuit board 40 side is prevented.

  Further, the grease cover 30 that partitions the housing recess 21 a side and the circuit board 40 side is provided with each tip connection portion 17 b of the connection component 15 (each conductive terminal 17) extending from the motor portion 10 and each conductive terminal 27 extending from the connector portion 25. It also has a function of guiding each base end connection portion 27b.

  As shown in FIGS. 3, 7 (a) and 7 (b), each base end which is a connection terminal on the connector portion 25 side is provided at a portion of the grease cover 30 located on the insertion window 21 e of the gear housing 21. A protruding portion 30c that guides the connecting portion 27b is provided. The protruding portion 30c is one for the plurality (five) of base end connection portions 27b, and has a thickness (height) D1 larger than the plate thickness D0 of the main partition portion of the grease cover 30, that is, Each guide hole 30d has a long configuration for guiding through each base end connection portion 27b.

  Each guide hole 30d has a constant linear portion 30d1 on the upper surface 30a side of the grease cover 30 that is substantially the same diameter as each proximal end connecting portion 27b, and gradually expands from the linear portion 30d1 toward the opening on the lower surface 30b side. This is a tapered portion 30d2. In other words, the taper portion 30d2 of each guide hole 30d has an expanded shape on the lower surface 30b side of the grease cover 30, that is, on the insertion side of each base end connection portion 27b, and thus a slight positional deviation or inclination occurs. Even each base end connection portion 27b is guided into each guide hole 30d to facilitate insertion thereof, and a positional shift or inclination is corrected toward the straight portion 30d1 on the back side. Then, the positional shift and the inclination of each base end connection portion 27b protruding from the opening of each guide hole 30d on the upper surface 30a side of the grease cover 30 are corrected by the taper portion 30d2 and the straight portion 30d1, so that the circuit board 40 Each base end connection portion 27b can be easily inserted into each connection hole 40c. Thereafter, each base end connection portion 27b inserted into each connection hole 40c of the circuit board 40 is electrically connected to the circuit board 40 by soldering.

  Further, as shown in FIGS. 3, 8A and 8B, the grease cover 30 is provided with a heat radiating convex portion 21d of the gear housing 21 and a circuit board 40 (a driving portion 40a1 which is a heat generating portion). Opposing openings 30e that can be opposed to each other and that are in direct contact with each other are provided, and three protruding shapes that guide each tip connecting portion 17b that is a connection terminal on the motor unit 10 side on the inner peripheral edge of the facing opening 30e. A portion 30f is provided. Each projecting portion 30f is provided for each of a plurality (three) of the tip connection portions 17b, and has a thickness (height) D2 larger than the plate thickness D0 of the main partition portion of the grease cover 30, that is, each Each guide hole 30g is configured to be long and guided through the tip connection portion 17b.

  Each guide hole 30g has a straight portion 30g1 on the upper surface 30a side of the grease cover 30 and a tapered portion 30g2 on the lower surface 30b side, and functions in the same manner as each guide hole 30d described above. That is, the taper portion 30g2 and the straight portion 30g1 correct the positional deviation and the inclination of each tip connection portion 17b protruding from the opening of each guide hole 30g on the upper surface 30a side of the grease cover 30, and each connection hole 40d of the circuit board 40. It becomes easy to insert each tip connection portion 17b into the. Thereafter, each tip connection portion 17b inserted into each connection hole 40d of the circuit board 40 is electrically connected to the circuit board 40 by soldering. Thereby, the motor part 10 (stator 12), the circuit board 40, and the connector part 25 are electrically connected.

  In this way, the circuit board 40 is securely connected to each distal end connection portion 17b which is a connection terminal on the motor unit 10 side, or each proximal end connection portion 27b which is a connection terminal on the connector unit 25 side. After confirming that the electrical connection has been made securely, etc., the resin gear cover 50 is fixed to the gear housing 21 using the snap fit 50a and the screw 51 so as to cover the circuit board 40. It has become.

Next, the effect of this embodiment is described below.
(1) In the speed reduction unit 20 of the present embodiment, the circuit board 40 is further disposed on the speed reduction mechanism 23 accommodated in the gear housing 21 with the grease cover 30 interposed therebetween, and is fixed to the gear housing 21. The gear cover 50 is fixed to the gear housing 21 so as to cover the circuit board 40. Then, the conductive terminal 17 and the circuit are arranged such that the front end connecting portion 17b of the conductive terminal 17 (motor side wiring member) extending from the motor portion 10 side is located on the side (front side) opposite to the speed reduction mechanism 23 side in the circuit board 40. The substrate 40 is electrically connected. That is, the tip connection portion 17b, which is a connection portion of the conductive terminal 17 with the circuit board 40, is located on the opposite side of the circuit board 40 from the speed reduction mechanism 23 side and exposed to the front side, so that the circuit board 40 is mounted on the gear housing 21. It is possible to connect the tip connection portion 17b of the conductive terminal 17 to the circuit board 40 in a state in which is fixed, or to visually confirm the connection of the conductive terminal 17. Thereby, the electrical connection between the conductive terminal 17 and the circuit board 40 can be easily and reliably performed.

  (2) The connector part 25 is configured separately from the gear housing 21 and the gear cover 50, and is fixed to the gear housing 21 on the side to which the circuit board 40 is fixed, and extends from the connector part 25 side. 27 and the circuit board 40 are electrically connected. That is, by using the connector portion 25 as a separate component, the degree of freedom of the shape and material of the gear housing 21 and the gear cover 50 is high. That is, since the connector portion 25 does not have to be formed integrally with the gear housing 21 or the gear cover 50, the gear housing 21 or the gear cover 50 can have a relatively simple shape as in the present embodiment. Although the housing 21 is made of metal and the gear cover 50 is made of resin, the gear cover 50 can be made of metal.

  (3) The base end connection portion 27b, which is a connection portion with the circuit board 40 in the conductive terminal 27 extending from the connector section 25 side, is located on the opposite side of the circuit board 40 from the speed reduction mechanism 23 side and exposed to the front side. The base end connection portion 27b of the conductive terminal 27 can be connected to the circuit board 40 with the circuit board 40 fixed to the gear housing 21, or the connection of the conductive terminal 27 can be confirmed. Thereby, the electrical connection between the conductive terminal 27 and the circuit board 40 can be easily and reliably performed.

  (4) In the speed reduction portion 20, the space on the speed reduction mechanism 23 side in the gear housing 21 and the gear cover 50 and the space on the circuit board 40 side are partitioned by a grease cover 30 that is a partition member and applied to the speed reduction mechanism 23 side. For example, it is possible to prevent scattering of foreign matters including grease to the circuit board 40 side. The connection portions 17b and 27b of the conductive terminals 17 and 27 extending from the speed reduction mechanism 23 side (the side opposite to the circuit board 40 sandwiching the grease cover 30 itself) are respectively provided with a projecting portion 30f and a protrusion provided on the grease cover 30. Guided by the guide holes 30g and 30d of the installation portion 30c. Thereby, position shift and inclination of each connection part 17b, 27b of conductive terminals 17 and 27 can be corrected, and electrical connection with circuit board 40 can be performed easily and reliably. In the present embodiment, the guide of the distal end connection portion 17b of the conductive terminal 17 extending from the motor portion 10 side and the guide of the proximal end connection portion 27b of the conductive terminal 27 extending from the connector portion 25 side are performed. The electrical connection between the portion 25 and the circuit board 40 can be easily and reliably performed.

  (5) Since the thicknesses D2 and D1 of the projecting portion 30f and the projecting portion 30c as the guide portion are larger than the plate thickness D0 of the main partition portion of the grease cover 30, each connection portion 17b of the conductive terminals 17 and 27, The lengths of the guide holes 30g and 30d for guiding 27b can be set long, and the connecting portions 17b and 27b of the conductive terminals 17 and 27 can be guided more reliably. In addition, in order to increase the thickness of the grease cover 30 only in necessary places, consideration is given to suppressing the increase in the weight of the grease cover 30 as much as possible.

  (6) Because the guide holes 30g and 30d for guiding through the connection portions 17b and 27b of the conductive terminals 17 and 27 are tapered portions 30g2 and 30d2 in which the openings on the insertion side of the connection portions 17b and 27b are expanded. Even if the connecting portions 17b and 27b are slightly misaligned or inclined, they can be easily inserted, and the misalignment and inclination can be corrected more reliably.

  (7) As shown in FIG. 3, the first axis L1 that is the axis of the worm 13a of the rotary shaft 13 and the axis L0 of the output shaft 24 that rotates integrally with the worm wheel 22 are orthogonal to and parallel to the first axis L1. Between the second axis L2, there is a dead space DS on the side of the meshing portion between the worm 13a and the worm wheel 22, and therefore the connector portion 25 is disposed almost entirely (part or all is acceptable) in the space DS. By adopting such a configuration, it is possible to reduce the size of the speed reduction unit 20 and thus the motor M.

  (8) The circuit board 40 directly contacts the base portion 21f of the metal gear housing 21 without fixing the grease cover 30 and is fixed by the screw 41. Thus, since the circuit board 40 is grounded with respect to the gear housing 21, no grounding work for the circuit board 40 is required.

  (9) The grease cover 30 is disposed on the speed reduction mechanism 23 accommodated in the gear housing 21, the circuit board 40 is fixed to the gear housing 21, and then the gear cover 50 is attached to the gear housing 21 so as to cover the circuit board 40. Since it is a fixed structure, it can be covered with the gear cover 50 after the electrical connection of the circuit board 40 is confirmed. That is, it can be provided as a motor M in which the electrical connection related to the circuit board 40 is more reliable.

  (10) Direct contact between the driving portion 40a1 on the circuit board 40 and the heat radiating convex portion 21d of the gear housing 21 by the facing opening 30e provided in the grease cover 30, that is, the grease cover 30 which is a partition member. Since the contact without pinching is possible, it is possible to efficiently dissipate heat of the driving unit 40a1 which is a heat generating unit. In the present embodiment, the drive unit 40a1 is disposed between the control unit 40a2 and the connection hole 40d on the circuit board 40, and heat is radiated from the drive unit 40a1 that is a heat generation unit between the control unit 40a2 and the connection hole 40d. Has been done.

In addition, you may change the said embodiment as follows.
Although applied to the connection between the circuit board 40 and the conductive terminal 17 (connecting portion 17b) extending from the motor unit 10 and the conductive terminal 27 (connecting portion 27b) extending from the connector unit 25, it is applied to either one side. May be. In addition, the present invention may be applied to the connection between the conductive terminal arranged in the motor M and the circuit board 40.

  In the grease cover 30, the thickness of the portions (projecting portions 30f and protruding portions 30c) that guide the connecting portions 17b and 27b of the conductive terminals 17 and 27 is increased, but the thickness is equal to that of the main partitioning portion. It may be set. Moreover, you may change suitably the shape of the protrusion part 30f which is a guide part, and the convex part 30c.

The guide holes 30g and 30d are used for the guides of the connecting portions 17b and 27b of the conductive terminals 17 and 27, but other holes such as a partially opened groove may be used.
The guide holes 30g and 30d are configured by the tapered portions 30g2 and 30d2 and the linear portions 30g1 and 30d1, but may be configured by only the tapered portion or only the linear portion.

  The conductive terminals 17 and 27 as the motor side wiring member and the connector side wiring member are made of a metal plate material, but a flexible lead wire may be used as the wiring member.

  The connector portion 25 is disposed on the side opposite to the motor fixing portion 21b (motor portion 10) of the gear housing 21 in the axial direction. Specifically, as shown in FIG. 3, the connector portion 25 is the axis of the rotary shaft 13 (worm 13a). Although arranged between the first axis L1 and the second axis L2 orthogonal to the axis L0 of the output shaft 24 and parallel to the first axis L1, the arrangement position is not limited to this and may be changed as appropriate. For example, as shown in FIG. 9, the connector portion 25 may be arranged so as to be aligned with the motor fixing portion 21b (motor portion 10) in a direction orthogonal to the axis of the rotating shaft 13 (first axis L1 in FIG. 3). . In this way, the amount of protrusion of the motor M in the axial direction can be suppressed, and the motor M can be downsized in the axial direction.

  The connector 25 is separated from the gear housing 21 and the gear cover 50 and fixed to the gear housing 21 side, but may be fixed to the gear cover 50 side. Alternatively, the connector portion 25 may be provided integrally with the gear housing 21 or the gear cover 50.

  The circuit board 40 is directly brought into contact with the base portion 21f of the metal gear housing 21 without sandwiching the grease cover 30, and the screw 41 as a conductive member and the ground pattern portion 40b on the circuit board 40 Although the circuit board 40 is grounded with respect to the gear housing 21 by the contact, the grounding structure is not limited to this. For example, a conductive member other than the screw 41 may be used. Further, a grounding pattern portion may be provided on the lower surface of the circuit board 40 and grounding may be achieved by contact with the pedestal portion 21 f of the gear housing 21. That is, the screw 41 is not essential on the ground path. Also in this case, a conductive member may be interposed on the lower surface of the circuit board 40 between the ground pattern portion and the pedestal portion 21 f of the gear housing 21.

  Although the drive part 40a1 which is a heat generating part of the circuit board 40 and the heat radiating convex part 21d of the gear housing 21 are brought into direct contact with each other, the heat transfer member such as a heat transfer paste is not limited thereto. May be interposed.

-Arrangement | positioning of the drive part 40a1, the control part 40a2, the opening 30e for opposition on the circuit board 40, the connection holes 40c and 40d, etc. is not restricted to this, You may change suitably.
-Although applied to the grease cover 30 as a partition member, you may apply to the partition member which partitions space other than prevention of grease scattering.

-Although the speed reduction mechanism 23 was comprised with the worm | warm 13a and the worm wheel 22, the structure of a speed reduction mechanism is not restricted to this, You may change suitably.
-Although the motor part 10 was comprised by the brushless motor, the structure of a motor part is not restricted to this, For example, you may change suitably, such as a motor with a brush.

The motor M is used as a drive source for the vehicle wiper device, but may be used as a drive source for other devices.
In addition to the above, the configuration of the motor M may be changed as appropriate.

Next, a technical idea that can be grasped from the above embodiment and another example will be added below.
(A) The motor part and the speed reduction part are assembled together, and the rotation of the rotating shaft by driving the motor part is decelerated by the speed reduction mechanism of the speed reduction part and output.
The speed reduction part is a motor in which a circuit board constituting a drive circuit for driving the motor part is integrally housed in a housing member together with the speed reduction mechanism,
The speed reducer includes a gear housing and a gear cover as the housing member, and is housed in the gear housing to partition the space on the speed reduction mechanism side and the space on the circuit board side in the housing member with a partition member. The circuit board is fixed to the gear housing in a state where the partition member is disposed on the speed reduction mechanism, and the gear cover is fixed to the gear housing so as to cover the circuit board. Characteristic motor.

  By the way, in a motor in which a motor unit and a speed reduction unit are integrally assembled, a method in which a speed reduction mechanism is accommodated in a gear housing and a circuit board is accommodated in a gear cover, and those accommodated in each other are assembled. Also, since the conductive terminal arranged in the motor is generally on the speed reduction mechanism side, the electrical connection between the conductive terminal connection part and the circuit board is made at the same time as the assembly of the gear housing and the gear cover. It is often difficult to confirm (such as visual inspection).

  Based on this, according to the above aspect, the partition member is arranged on the speed reduction mechanism accommodated in the gear housing, the circuit board is fixed to the gear housing, and then the gear cover is fixed to the gear housing so as to cover the circuit board. Therefore, it is possible to cover the circuit board with the gear cover after confirming the electrical connection of the circuit board. In other words, it is possible to provide a motor with more reliable electrical connection related to the circuit board.

(B) The motor part and the speed reduction part are assembled together, and the rotation of the rotating shaft driven by the motor part is reduced by the speed reduction mechanism of the speed reduction part and output.
The speed reduction part is a motor in which a circuit board constituting a drive circuit for driving the motor part is integrally housed in a housing member together with the speed reduction mechanism,
The speed reduction portion includes a gear housing and a gear cover as the housing member, the circuit board is fixed to the gear housing on the speed reduction mechanism housed in the gear housing, and the gear cover serves as the circuit board. A structure that is fixed to the gear housing so as to cover,
The connector part configured separately from the gear housing and the gear cover is fixed to the gear housing to which the circuit board is fixed, and the connector side wiring member extending from the connector part and the circuit board are A motor characterized by being electrically connected.

  According to the above aspect, the connector portion is configured separately from the gear housing and the gear cover, and is fixed to the gear housing on the side to which the circuit board is fixed, so that the connector side wiring member and the circuit board are electrically connected. Connected. That is, by making the connector part a separate part, it is possible to expect effects such as a higher degree of freedom in the shape and material of the gear housing and gear cover.

(C) The motor part and the speed reduction part are assembled together, and the rotation of the rotating shaft driven by the motor part is decelerated by the speed reduction mechanism of the speed reduction part and output.
The speed reduction part is a motor in which a circuit board constituting a drive circuit for driving the motor part is integrally housed in a housing member together with the speed reduction mechanism,
The speed reduction part has a structure in which a space on the speed reduction mechanism side in the housing member and a space on the circuit board side are partitioned by a partition member,
The said partition member is provided with the guide part which guides the connection part with the said circuit board of the conductive terminal extended from the said deceleration mechanism side.

  According to the above aspect, the space on the speed reduction mechanism side in the housing member of the speed reduction portion and the space on the circuit board side are partitioned by the partition member, and prevention of scattering of foreign matters from the speed reduction mechanism side to the circuit board side is achieved. In the structure, the connection portion of the conductive terminal extending from the speed reduction mechanism side with the circuit board is guided by a guide portion provided on the partition member. As a result, it is possible to correct the positional deviation and inclination of the connection portion of the conductive terminal, and it is possible to easily and reliably make electrical connection with the circuit board.

(D) In the motor described in (c) above,
The partition member has a substantially plate shape and is configured such that the thickness of the guide portion is larger than the plate thickness of the main partition portion.

  According to the above aspect, since the thickness of the guide portion is larger than the plate thickness of the main partition portion of the partition member, the length of the portion that guides the connection portion of the conductive terminal can be set longer, and the connection portion of the conductive terminal can be further increased. It is possible to reliably guide. In addition, in order to increase the thickness of the partition member only in the necessary locations, consideration is given to suppressing an increase in the weight of the partition member as much as possible.

(E) In the motor described in (c) or (d) above,
The guide portion of the partition member has a guide hole for inserting the connection portion of the conductive terminal,
The motor according to claim 1, wherein the guide hole has a tapered portion in which an opening on an insertion side of the connection portion of the conductive terminal is expanded.

  According to the above aspect, the guide hole inserted and guided through the connecting portion of the conductive terminal is a tapered portion in which the opening on the insertion side of the connecting portion is widened. However, it is easy to insert, and it is possible to more reliably correct misalignment and inclination.

(F) In the motor according to any one of (c) to (e) above,
The motor is characterized in that the conductive terminal extends from the motor part side and serves to electrically connect the motor part and the circuit board.

  According to the above aspect, the guide portion guides the connection portion of the conductive terminal extending from the motor portion side, and the electric connection between the motor portion and the circuit board can be easily and reliably performed.

(G) In the motor according to any one of (c) to (f) above,
The deceleration portion has a structure in which a connector portion is separately mounted on the housing member,
The motor is characterized in that the conductive terminal extends from the connector portion side and serves to electrically connect the connector portion and the circuit board.

  According to the above aspect, the guide portion guides the connecting portion of the conductive terminal extending from the connector portion side, and the electrical connection between the connector portion and the circuit board can be easily and reliably performed.

(H) In the motor according to any one of (c) to (g) above,
The speed reduction portion includes a gear housing and a gear cover as the housing member, and the circuit board is fixed to the gear housing in a state where the partition member is disposed on the speed reduction mechanism accommodated in the gear housing. The motor is characterized in that the gear cover is fixed to the gear housing so as to cover the circuit board.

  According to the above aspect, the partition member is disposed on the speed reduction mechanism housed in the gear housing, the circuit board is fixed to the gear housing, and then the gear cover is fixed to the gear housing so as to cover the circuit board. Therefore, it is possible to confirm the electrical connection related to the circuit board and then cover it with a gear cover. In other words, it is possible to provide a motor with more reliable electrical connection related to the circuit board.

(L) In the motor described in (H) above,
The gear housing is made of metal;
2. The motor according to claim 1, wherein the circuit board is in contact with the base portion of the gear housing directly or via a conductive member without sandwiching the partition member.

  According to the above aspect, the circuit board is in contact with the base portion of the metal gear housing directly or via the conductive member without sandwiching the partition member, and is thus grounded. do not do.

(Nu) In the motor described in (ri) above,
The gear housing includes a heat dissipating part that is brought into contact with a heat generating part disposed on the circuit board directly or via a heat transfer member,
The said partition member is provided with the opening for opposing which makes the said thermal radiation part and the said heat-emitting part oppose, The motor characterized by the above-mentioned.

  According to the above aspect, the facing opening provided in the partition member enables contact between the heat generating portion on the circuit board and the heat radiating portion of the gear housing directly or via the heat transfer member (contact without sandwiching the partition member). Therefore, it is possible to efficiently dissipate heat from the heat generating portion.

(Le) In the motor described in (nu) above,
The circuit board includes a driving unit including a semiconductor switching element that is the heat generating unit, a control unit that controls driving of the driving unit, and the circuit board that extends from the motor unit side for electrical connection with the circuit board. A connection hole to which the conductive terminal is connected,
The motor is characterized in that the drive unit is disposed between the control unit and the connection hole.

  According to the above aspect, the drive unit (heat generation unit) including the semiconductor switching element on the circuit board is between the control unit that controls the drive unit and the connection hole that connects the conductive terminal extending from the motor unit side. The drive unit (heat generation unit) radiates heat between the control unit and the connection hole.

DESCRIPTION OF SYMBOLS 10 ... Motor part, 13 ... Rotary shaft, 13a ... Worm, 17 ... Conductive terminal (motor side wiring member), 17b ... End connection part (end part, connection part), 20 ... Reduction part, 21 ... Gear housing (housing member) ), 21f ... pedestal part, 22 ... worm wheel, 23 ... deceleration mechanism, 24 ... output shaft, 25 ... connector part, 27 ... conductive terminal (connector side wiring member), 27b ... base end connection part (end part, connection part) ), 30 ... Grease cover (partition member), 30c ... Projection portion (guide portion), 30d ... Guide hole, 30d2 ... Tapered portion, 30f ... Projection portion (guide portion), 30g ... Guide hole, 30g2 ... Tapered portion 40 ... circuit board, 41 ... screw, 50 ... gear cover (housing member), D0 ... plate thickness, D1, D2 ... thickness, L0 ... axis, L1 ... axis (first axis), L2 ... axis (second axis) ).

Claims (8)

The motor part and the speed reduction part are assembled together, and the rotation of the rotating shaft driven by the motor part is decelerated by the speed reduction mechanism of the speed reduction part and output.
The speed reduction part is a motor in which a circuit board constituting a drive circuit for driving the motor part is integrally housed in a housing member together with the speed reduction mechanism,
The speed reduction part has a gear housing and a gear cover as the housing member, the circuit board is disposed on the speed reduction mechanism accommodated in the gear housing and fixed to the gear housing, and the gear cover is A structure that is fixed to the gear housing so as to cover the circuit board,
The motor-side wiring member extending from the motor unit and the circuit board are electrically connected to each other so that at least an end of the motor-side wiring member is located on the side opposite to the speed reduction mechanism side of the circuit board. A motor characterized by being made. The motor according to claim 1,
The connector part configured separately from the gear housing and the gear cover is fixed to the gear housing on the side where the circuit board is fixed, and the connector side wiring member extending from the connector part and the circuit board And a motor that is electrically connected to each other. The motor according to claim 2,
The connector side wiring member and the circuit board are electrically connected to each other so that at least an end portion of the connector side wiring member is located on the opposite side of the circuit board from the speed reduction mechanism side. A motor characterized by The motor according to claim 2 or 3,
The speed reduction part has a structure that partitions the space on the speed reduction mechanism side and the space on the circuit board side with a partition member,
The partition member includes a guide portion that guides a connection portion between at least one of the motor-side wiring member and the connector-side wiring member that extends from a side opposite to the circuit board sandwiching itself. Motor. The motor according to claim 4,
The partition member has a substantially plate shape and is configured such that the thickness of the guide portion is larger than the plate thickness of the main partition portion. The motor according to claim 4 or 5,
The guide part of the partition member has a guide hole for inserting the connection part,
The motor according to claim 1, wherein the guide hole has a tapered portion in which an opening on the insertion side of the connection portion is widened. The motor according to any one of claims 2 to 6,
The speed reduction mechanism includes a worm provided on the rotating shaft, a worm wheel meshing with the worm, and an output shaft capable of rotating integrally with the worm wheel,
The connector portion includes a part of the connector portion between a first axis that is a worm axis of the rotating shaft and a second axis that is orthogonal to the axis of the output shaft and parallel to the first axis. A motor characterized in that all are arranged. The motor according to any one of claims 1 to 7,
The circuit board is directly abutted against a pedestal portion of the gear housing and fixed with a screw, and the circuit board is grounded with respect to the gear housing by contact with the screw. Motor.