JP2019075858A - motor - Google Patents

Abstract

To provide a motor in which assembly or electrical connection of a circuit board can be performed more easily.SOLUTION: In a structure of a motor, a cover member 35 is mounted in a circuit accommodation part 31 of a gear housing 22, such that multiple terminals 40 erected in the cover member 35 are inserted and electrically connected into connecting pores 30b of a circuit board 30. Further, the terminals are inserted into inserting pores 42b of an insertion hole 42 of a connector part 41 which is provided on the gear housing 22, and functioned as connecting terminals.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a motor integrally provided with a circuit board.

Among motors, there is known one in which a circuit board on which a control circuit is configured is integrally provided in a housing member.
For example, in the motor disclosed in Patent Document 1, a motor unit and a speed reduction unit for reducing rotational drive of the motor unit are integrally assembled, and a connector module is integrally assembled to the speed reduction unit. . In the connector module, the circuit board is assembled integrally to the connector housing, the circuit board and the connector section are electrically connected, and the connector section and the circuit board are assembled by being assembled to the gear housing of the speed reduction section. And the motor unit is electrically connected.

Patent No. 5919164 gazette

  By the way, the inventor of the present invention is considering making a simpler assembling structure in a motor integrally provided with a circuit board, and among them, assembling of the circuit board with respect to the housing member and electrical connection of the circuit board I was considering making it easier.

  An object of the present invention is to provide a motor which can more easily assemble and electrically connect a circuit board.

  In the motor for solving the above-mentioned problems, the circuit board is disposed in the insertion recess of the housing member with the circuit board being inserted, the opening of the recess is closed by the cover member, and the circuit substrate is integrated in the housing member. A terminal, which is housed, and in which the cover member is mounted on the housing member, a terminal erected on the cover member is inserted and electrically connected to a connection hole provided on the circuit board, and the housing It has a structure which functions as a connection terminal by being inserted into the insertion hole of the insertion hole of the connector portion provided in the member.

  According to the above aspect, when the cover member is mounted on the housing member, the terminal provided upright on the cover member is inserted and electrically connected to the connection hole of the circuit board, and the difference between the connector portions provided on the housing member It is inserted into the insertion hole of the insertion hole and functions as a connection terminal. That is, the terminal, the circuit board and the connector portion can be electrically connected by mounting the cover member. In addition, movement of the circuit board in the housing recess can be restricted by the inserted terminal, which contributes to reduction of the number of assembling steps of the circuit board.

In the motor, the mounting direction of the circuit board in the housing recess and the mounting direction of the cover member are orthogonal to each other.
According to the above aspect, since the mounting direction of the cover member is orthogonal to the mounting direction of the circuit board in the housing recess, the terminal provided on the cover member can be easily inserted and electrically connected to the circuit board.

In the motor, a guide portion for guiding the circuit board in a planar direction of the circuit board is provided in the housing recess.
According to the above aspect, since the circuit board is guided and inserted in the planar direction of the circuit board by the guide portion provided in the accommodation recess, the circuit board can be easily inserted, and the circuit board in the accommodation recess can be Movement restrictions can be easily made.

In the motor, the terminal includes a press fit portion at a portion corresponding to the connection hole of the circuit board.
According to the above aspect, a press fit portion is provided at a portion corresponding to the connection hole of the circuit board in the terminal, and the press fit portion is in pressure contact with the connection hole of the circuit board, so more reliable electrical connection between the terminal and the circuit board Connection can be performed, and more reliable movement restriction of the circuit board can be achieved by the inserted terminal.

  The motor is a motor in which a motor unit that generates rotational driving force and a reduction unit that decelerates and outputs rotational drive of the motor unit are integrally assembled, and the housing member constitutes the reduction unit. And the circuit board is integrally housed in the gear housing.

  According to the above aspect, the circuit board is integrally housed in the gear housing of the speed reduction portion in which the motor portion and the speed reduction portion are integrally assembled. Electrical connection can be made easier.

  According to the motor of the present invention, assembly and electrical connection of the circuit board can be made more easily.

It is a front view of the motor in one embodiment. It is a partially broken view of the circuit accommodating part vicinity of a motor. It is a side view which shows the circuit accommodating part (cover assembly state) of a motor. It is a side view which shows the circuit accommodating part (the state before cover assembly) of a motor. It is a perspective view which shows the circuit accommodating part (the board | substrate and the state before cover assembly) of a motor.

Hereinafter, an embodiment of the motor will be described.
The motor 10 of the present embodiment shown in FIG. 1 is used, for example, as a drive source of a power window device that opens and closes a window glass of a vehicle. The motor 10 is configured by integrally assembling a motor unit 11 that generates rotational driving force and a reduction unit 21 that decelerates and outputs rotational drive of the motor unit 11. As a whole, the motor 10 has a flat shape having a small thickness in one direction (the direction orthogonal to the paper surface in FIG. 1) orthogonal to its own axial direction (the direction of the axis L1 of the rotation shaft 15 of the motor unit 11). The longitudinal direction (left and right direction in FIG. 1) when the motor 10 is viewed from the axial direction is referred to as a flat direction, and the short direction (right direction in FIG. 1) as a thickness direction. The axial direction, the flat direction, and the thickness direction of the motor 10 are directions orthogonal to each other.

  In the motor unit 11, a magnet (not shown) is fixed to the inner side surface of a bottomed cylindrical yoke housing 12 made of magnetic metal, and the armature 13 is rotatably accommodated inside the magnet. In the yoke housing 12, the opening 12 a is directed toward the reduction gear 21, and the flange 12 b extending outward in the radial direction of the opening 12 a and the gear housing 22 of the reduction gear 21 are fixed by screws 14. The armature 13 has a rotation shaft 15, an armature core 16 fixed to the rotation shaft 15, a coil 17 wound around the armature core 16, and the reduction shaft 21 side of the rotation shaft 15 relative to the armature core 16. And a commutator 18 fixed thereto. The tips of the commutator 18 and the rotary shaft 15 project from the opening 12 a of the yoke housing 12, that is, are located in the gear housing 22 of the reduction gear 21.

  Incidentally, as the motor unit 11, a brush device is assembled so as to be interposed between the yoke housing 12 and the gear housing 22 of the speed reduction unit 21. The brush device supplies power for rotationally driving the armature 13 from the commutator 18 to the coil 17 when a power supply brush provided on the brush device comes in contact (sliding contact) with the commutator 18. The power supply brush of the brush device is electrically connected to the circuit board 30 so as to receive power supply via a connector 41 and a circuit board 30 described later.

  In the reduction gear unit 21, the reduction gear mechanism 23 is accommodated in a gear housing 22 made of resin and having a predetermined flat shape. The reduction mechanism 23 is a worm reduction mechanism having a worm shaft 24 and a worm wheel 25, and each is rotatably accommodated in the gear housing 22. The worm shaft 24 is disposed coaxially with the rotation shaft 15 of the motor unit 11, and both shafts 15 and 24 are drivingly connected to each other via a clutch 26. The worm wheel 25 meshes with the worm portion 24 a of the worm shaft 24 and rotates integrally with the output shaft 27 provided at the center. The axis L2 of the output shaft 27 is directed in the thickness direction (a direction perpendicular to the flat direction) of the motor 10, and the tip end projects on the back side (the back side in the drawing of FIG. 1) of the motor 10. Then, when the rotation of the rotating shaft 15 is transmitted to the worm shaft 24 through the clutch 26, the rotation is transmitted to the output shaft 27 through the worm shaft 24 (the worm portion 24 a) and the worm wheel 25. The rotation of the output shaft 27 is transmitted to a window regulator (not shown) for opening and closing the window glass.

  The clutch 26 has a function of transmitting the rotation of the rotary shaft 15 by the rotational drive of the motor unit 11 to the worm shaft 24 and a function of blocking the rotation of the worm shaft 24 due to the input from the output shaft 27 side. ing. That is, when the window glass tries to operate in the opening direction unexpectedly, the rotation of the output shaft 27 accompanying this is transmitted to the worm shaft 24, but the rotation of the worm shaft 24 is blocked by the function of the clutch 26. The sudden opening of the door is blocked.

  Further, in such a clutch 26, an annular sensor magnet 28 is provided on the drive side rotation body 26 a that integrally rotates with the rotation shaft 15. That is, the sensor magnet 28 rotates with the rotation shaft 15 (drive side rotation body 26 a), and a rotation detection element (such as a Hall IC) 33 d described later detects the change in the magnetic field accompanying the rotation of the sensor magnet 28 from the outer peripheral side. The detection of the rotational speed of the rotating shaft 15, that is, the detection of the open / close position of the window glass, etc. is performed.

  The speed reduction portion 21 includes a circuit housing portion 31 in which a circuit board 30 including a control circuit of the motor 10 (motor portion 11) is housed in addition to housing the speed reduction mechanism 23, and a connector portion 41 for supplying power from the outside. And are integrally provided. The circuit housing portion 31 and the connector portion 41 are located on the opposite side of the speed reduction portion 21 (motor 10) on the side where the worm wheel 25 is disposed with respect to the side on which the worm wheel 25 is disposed. It is located closer to the motor unit 11 than the worm wheel 25 in the direction.

  As shown in FIGS. 2 to 5, the circuit accommodating portion 31 of the speed reducing portion 21 has a substantially rectangular parallelepiped appearance. A housing recess 32 is provided in the circuit housing portion 31 of the gear housing 22. The housing recess 32 has a rear opening 32a in which one side (the rear side in FIG. 1) of the circuit housing 31 opens in the thickness direction of the motor 10, and one side of the circuit housing 31 in the flat direction of the motor 10 (FIG. 1). And the side opening 32b which is open. That is, in the both openings 32a and 32b, two surfaces of the left side surface and the back surface of the circuit housing portion 31 are continuously opened.

  The circuit board 30 has a flat plate shape, and various electronic components 33a to 33c constituting a control circuit and the like are mounted on one side or both sides. The circuit board 30 is inserted into and accommodated in the accommodation recess 32 from the side opening 32 b side. At that time, the circuit board 30 is inserted in the mounting direction X1 (from left to right in FIG. 1) in which the planar direction of the circuit board 30 is along the flat direction of the motor 10. It arrange | positions in the accommodation recessed part 32 so that the axial line L1 direction of the part 11 may be followed.

  Here, when the circuit board 30 is inserted, guide grooves 34 provided on the upper inner side surface and the lower inner side surface of the housing recess 32 are used. That is, the guide groove 34 has a groove shape which is continuous along the flat direction of the motor 10 in order to guide the insertion of the circuit board 30. Movement of the circuit board 30 inserted in the guide groove 34 in both the axial direction of the motor 10 (direction of the axis L1 of the motor unit 11) and the thickness direction of the motor 10 (direction orthogonal to the flat direction) is restricted. It becomes.

  Then, when the circuit board 30 is inserted along the guide groove 34 to a desired position, connection terminals (not shown) provided on the circuit board 30 and connection terminals (not shown) extending from the motor unit 11 side are connected. It has become so. In addition, a rotation detection element (such as a Hall IC) 33 d is mounted on the extension 30 a provided on the insertion tip side of the circuit board 30, and the circuit board 30 is inserted along the guide groove 34 to a desired position. The rotation detection element 33 d mounted on the extension portion 30 a is made to approach to a suitable position with respect to the sensor magnet 28.

  The rear opening 32 a and the side opening 32 b of the housing recess 32 are closed by the attachment of the cover member 35 to the gear housing 22. The cover member 35 has a rectangular plate-shaped back cover portion 35a for closing the back surface opening 32a and a rectangular plate-shaped side cover portion 35b for closing the side surface opening 32b. The back cover portion 35a and the side cover portion A shape 35b is orthogonal to each other (L-shaped in the axial direction of the motor 10). The cover member 35 is attached to the gear housing 22 in a mounting direction X2 (from the rear side to the front side in FIG. 1) along the thickness direction of the motor 10.

  Here, in mounting the cover member 35, locking pieces 36 extending in the mounting direction from the upper end edge central portion and the lower end edge central portion of the back cover portion 35a are used. The locking piece 36 is configured to have elasticity in the vertical direction, and locks with a locking projection 37 provided on the outer surface of the circuit housing portion 31 in the gear housing 22. That is, the cover member 35 is mounted in a so-called snap fit structure in which the locking piece 36 of its own is locked to the locking projection 37 on the gear housing 22 side. The cover member 35 is removable from the gear housing 22.

  Further, proximal ends of a plurality of terminals 40 for feeding and signaling are fixed to the back cover portion 35 a of the cover member 35 by an insert. Each terminal 40 is erected vertically (parallel to the side cover 35b and the locking piece 36) with respect to the back cover 35a, that is, erected along the mounting direction X2 of the cover 35. On the other hand, the circuit board 30 is provided with a plurality of connection holes 30 b electrically connected by the insertion of the terminals 40 corresponding to the positions of the terminals 40. And each terminal 40 is inserted in the connection hole 30b of the circuit board 30 with mounting | wearing of the cover member 35, and mutual electrical connection is made. Each terminal 40 has a press-fit portion 40a which has a shape that bulges slightly outward and which can be deformed inwardly at a predetermined portion close to the base end where connection with the connection hole 30b of the circuit board 30 is made.

  The connector portion 41 is provided at a position overlapping the circuit housing portion 31 in a front view of the motor 10 (as viewed in the direction perpendicular to the sheet of FIG. 1). The connector portion 41 of the gear housing 22 is provided with an insertion hole 42 into which a power supply connector (not shown) extending from the vehicle side is inserted. Around the insertion hole 42, a waterproof boot 43 made of rubber and having a substantially cylindrical shape is mounted. The waterproof boot 43 has an electrical connection portion with a power supply connector mounted in the insertion hole 42 in a waterproof structure when the motor 10 is attached to a vehicle. The rear surface portion 42 a of the insertion hole 42 is provided with a plurality of insertion holes 42 b corresponding to the respective terminals 40. Then, with the mounting of the cover member 35, the tip end 40 b of each terminal 40 is inserted into the insertion hole 42 b of the insertion hole 42, and each tip 40 b functions as a connection terminal of the connector portion 41.

Next, an assembly mode (including electrical connection) mainly including the circuit housing portion 31 and the connector portion 41 in the motor 10 of the present embodiment will be described.
The circuit board 30 is inserted in the mounting direction X1 along the guide groove 34 into the housing recess 32 from the side opening 32b in the circuit housing 31 (gear housing 22). The planar direction of the circuit board 30 guided by the guide groove 34 is inserted in the flat direction of the motor 10 and disposed in the accommodation recess 32, and the planar direction of the circuit board 30 is the axial direction of the motor 10 It is arranged along the axis L1). When the circuit board 30 is inserted to a desired position in the housing recess 32, the connection terminal (not shown) on the circuit board 30 side and the connection terminal (not shown) on the motor unit 11 side are electrically connected. Movement of the circuit board 30 in the axial direction and thickness direction of the motor 10 is restricted by being guided by the guide groove 34, but movement restriction in the direction along the guide groove 34 is further restricted by connection of both connection terminals. May be used. Also, in order to keep the connection of both connection terminals good, the guide groove 34 may be provided with a butt.

  After the circuit board 30 is mounted in the housing recess 32, the cover member 35 is mounted. The cover member 35 is mounted on the circuit housing portion 31 (gear housing 22) in the mounting direction X2. The mounting direction X2 of the cover member 35 is orthogonal to the mounting direction X1 of the circuit board 30. When the cover member 35 is attached, each terminal 40 is inserted into the connection hole 30 b of the circuit board 30, and then inserted into the insertion hole 42 b of the insertion hole 42 of the connector portion 41.

  Then, when the locking piece 36 of the cover member 35 locks with the locking projection 37 of the circuit housing portion 31 (gear housing 22), that is, the snap fit mounting of the cover member 35 is performed, the rear opening 32a of the housing recess 32 Is closed by the back cover 35a of the cover member 35, and the side opening 32b is closed by the side cover 35b.

  Further, in a state in which the mounting of the cover member 35 is completed, the press-fit portions 40a of the respective terminals 40 are positioned in the connection holes 30b of the circuit board 30, and the respective press-fit portions 40a are in pressure contact with the inner side surface of the connection holes 30b. Thereby, each terminal 40 and the circuit board 30 are electrically connected more reliably. In addition, the terminals 40 are inserted into the connection holes 30 b of the circuit board 30 to restrict the movement of the circuit board 30 in the direction along the guide grooves 34. Furthermore, the base end of each terminal 40 is fixed to the cover member 35 (back cover portion 35a), the tip end 40b is supported by the insertion hole 42b of the insertion hole 42, and the circuit board 30 is moved between the two parts. Since the regulation is performed, the movement regulation of the circuit board 30 is performed more reliably. Thus, the circuit board 30 is held in the housing recess 32 simultaneously with the mounting of the cover member 35.

  Further, in the connector portion 41, the tip end portion 40 b of each terminal 40 is inserted through the insertion hole 42 b of the back surface portion 42 a of the insertion hole 42 and exposed in the insertion hole 42. Thus, the tip end portion 40 b of each terminal 40 functions as a connection terminal of the connector portion 41. Then, by inserting a power supply connector extending from the vehicle side into the insertion hole 42, the connector portion 41 having the tip portion 40b functioning as a connection terminal, the terminals 40, the circuit board 30, and the motor portion 11 are electrically connected to each other. Power supply and signal exchange can be performed.

Next, the effects of the present embodiment will be described below.
(1) When the cover member 35 is attached to the circuit housing portion 31 of the gear housing 22, the plurality of terminals 40 provided upright on the cover member 35 are inserted and electrically connected to the connection holes 30b of the circuit board 30, Furthermore, it is inserted into the insertion hole 42 b of the insertion hole 42 of the connector portion 41 provided in the gear housing 22 and functions as a connection terminal. That is, by mounting the cover member 35, the terminals 40, the circuit board 30, and the connector portion 41 can be electrically connected, and through the circuit board 30, the motor portion 11 can be electrically connected. Further, the movement of the circuit board 30 in the housing recess 32 can be restricted by the inserted terminal 40, which contributes to the reduction of the number of assembling steps of the circuit board 30. As described above, in the motor 10 of the present embodiment, the assembly and the electrical connection of the circuit board 30 can be more easily performed.

  (2) Since the mounting direction X2 of the cover member 35 is orthogonal to the mounting direction X1 of the circuit board 30 in the housing recess 32, insertion and electrical connection of the terminal 40 provided on the cover member 35 to the circuit board 30 Can be done easily.

  (3) Since the circuit board 30 is guided and inserted in the planar direction of its own by the guide groove 34 provided in the accommodation recess 32, the circuit board 30 can be easily inserted, and the inside of the accommodation recess 32 The movement restriction of the circuit board 30 can be easily performed.

  (4) The press fit portion 40a is provided at a portion of the terminal 40 corresponding to the connection hole 30b of the circuit board 30, and the press fit portion 40a is in pressure contact with the connection hole 30b of the circuit board 30. More reliable electrical connection can be made. Further, the movement of the circuit board 30 can be more surely restricted by the inserted terminal 40.

The above embodiment may be modified as follows.
The opening 32a, 32b of the housing recess 32 for housing the circuit board 30 has a shape in which the two surfaces are continuously opened, and the cover member 35 in which the cover 35a, 35b is L-shaped corresponding thereto is used However, the shape of the opening of the housing recess is not limited to this, and the shape of the cover may be changed appropriately in accordance with the change of the shape of the opening.

  The mounting direction X1 of the circuit board 30 in the housing recess 32 and the mounting direction X2 of the cover member 35 are set to be orthogonal to each other, but the mounting directions do not have to be orthogonal to each other. It may be set in any direction. Along with this, the shape of the opening of the accommodation recess and the shape of the cover member are appropriately changed.

  -Although the guide groove 34 which guides insertion of the circuit board 30 was provided in the accommodation recessed part 32, you may comprise the guide part which guides insertion of the circuit board 30 except groove | channel. Also, instead of the guide groove 34 (guide portion) having a function of guiding insertion, the circuit board 30 may be simply supported (held).

  The press fit portion 40 a is provided at a portion of the terminal 40 corresponding to the connection hole 30 b of the circuit board 30, but may be provided also for the insertion hole 42 b of the insertion hole 42 of the connector portion 41, for example. In this case, the circuit board 30 and the connector portion 41 may be provided in series, or the circuit board 30 and the connector portion 41 may be provided independently. In addition, the press fit portion 40 a may not be particularly provided.

  -Although it applied to motor 10 which assembles motor part 11 and reduction part 21 integrally, and accommodates circuit board 30 in gear housing 22 of reduction part 21 integrally, the composition of a motor is not restricted to this but is a housing member. The present invention may be applied to other motors that integrally house a circuit board.

  -Although applied to the motor 10 used as a drive source of a power window device, it may apply to a motor used as a drive source of vehicles mounting devices other than this, or a motor used as a drive source of devices other than vehicles mounting.

DESCRIPTION OF SYMBOLS 10 ... Motor 11, 11 ... Motor part, 21 ... Deceleration part, 22 ... Gear housing (housing member), 30 ... Circuit board, 30b ... Connection hole, 32 ... Accommodation recessed part, 32a ... Back opening part (opening part), 32b ... Side opening (opening), 34: guide groove (guide), 35: cover member, 40: terminal, 40a: press fit portion, 41: connector portion, 42: insertion hole, 42b: insertion hole, X1, X1 X2 ... mounting direction.

Claims (5)

The motor is arranged such that the circuit board is inserted in the housing recess of the housing member, the opening of the housing recess is closed by the cover member, and the circuit board is integrally housed in the housing member. ,
In the mounted state of the cover member to the housing member, the terminal erected on the cover member is inserted and electrically connected to the connection hole provided on the circuit board, and further, the insertion of the connector portion provided on the housing member A motor characterized in that it has a structure which is inserted into an insertion hole of a hole and functions as a connection terminal. In the motor according to claim 1,
A motor having a structure in which the mounting direction of the circuit board in the housing recess and the mounting direction of the cover member are orthogonal to each other. The motor according to claim 1 or 2
A motor characterized in that a guide portion for guiding the circuit board in a planar direction of the circuit board is provided in the housing recess. The motor according to any one of claims 1 to 3.
The said terminal is equipped with the press fit part in the site | part corresponding to the connection hole of the said circuit board, The motor characterized by the above-mentioned. The motor according to any one of claims 1 to 4 is a motor in which a motor unit that generates rotational driving force and a reduction unit that decelerates and outputs rotational drive of the motor unit are integrally assembled. There,
The motor is characterized in that the housing member is a gear housing constituting the speed reducing portion, and the circuit board is integrally accommodated in the gear housing.