JP2007159385A - Motor and method of manufacturing the motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor that reduces the mechanical stress exerted on an electrical connection of a control circuit member, and to prevent the occurrences of breakage of cables and other defects. <P>SOLUTION: A control circuit member 25, mounting a drive control IC41 for controlling a motor 1, is constructed, such that a terminal 38 for achieving electrical connection between a drive control IC41 and a brush holder 7 is held on a base 31 thereof, and the base 31 is attached to an attachment piece 7f of the brush holder 7 and is supported with respect to the brush holder 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a motor including a control circuit member on which a drive control IC is mounted, and a method for manufacturing the motor.

  As a motor used in a power window device or the like, a motor provided with a motor main body that is rotationally driven, a speed reduction unit that decelerates and outputs rotation generated in the motor main body, and a control circuit member that controls the rotational driving of the motor main body. is there. In recent years, it has been proposed to mount a drive control IC (an IC on which a motor driving transistor or the like is mounted) on the control circuit member.

Incidentally, although the drive control IC is not mounted, the circuit board constituting the control circuit member is mounted from the attached member side for mounting (accommodating) the board as in the motor disclosed in Patent Document 1, for example. It is connected to an extending terminal, and the circuit board is also supported at this connecting portion.
JP-T-2002-511728

  By the way, in the case where the motor receives vibrations and shocks and the vibrations and shocks are transmitted to the circuit board, the circuit board is electrically connected to the board, and the board is also supported as described in Patent Document 1 above. Then, the mechanical stress applied to the connecting portion is large. Therefore, in some cases, there is a concern that the electrical connection portion of the circuit board is broken, and the motor becomes inoperable.

  The present invention has been made in order to solve the above-described problems, and the object thereof is to reduce mechanical stress applied to the electrical connection portion of the control circuit member in a motor including the control circuit member, and to prevent disconnection or the like. It is an object of the present invention to provide a motor capable of preventing the occurrence of the problem and a method of manufacturing the motor.

  In order to solve the above-mentioned problems, the invention according to claim 1 is a motor main body including a brush holder for holding a power supply brush, a control circuit member that is equipped with a drive control IC and controls the rotational drive of the motor main body. The control circuit member includes a base portion that holds a terminal that establishes an electrical connection between the drive control IC and the brush holder, and the base portion is connected to the brush holder. The gist is to be supported.

  According to the same configuration, the control circuit member equipped with the drive control IC for controlling the motor is such that the terminal for holding the electrical connection between the drive control IC and the brush holder is held in the base portion. The part is supported with respect to the brush holder. As a result, since the base part of the circuit member is supported by the brush holder separately from the electrical connection part between the terminal on the control circuit member side and the brush holder side, the mechanical stress on the electrical connection part is reduced. Is done.

  According to a second aspect of the present invention, in the motor according to the first aspect of the present invention, the motor has a gear housing that houses a speed reduction mechanism that decelerates and outputs rotation generated in the motor body, and the control circuit member includes the brush holder and the motor The gist is that it is arranged between the gear housing.

  According to this configuration, since the control circuit member is disposed between the brush holder and the gear housing, it is easy to dispose the control circuit member between the gear housing and the brush holder having a relatively large degree of freedom.

  According to a third aspect of the present invention, in the motor according to the first or second aspect, the brush holder integrally has a housing portion that houses the control circuit member, and the base of the control circuit member is housed in the housing portion. The gist is that the portion is supported with respect to the brush holder.

  According to this configuration, the control circuit member is accommodated in the accommodating portion provided in the brush holder, and the base portion of the control circuit member is supported with respect to the brush holder in the accommodating portion. Thereby, sufficient protection of the control circuit member is possible.

  According to a fourth aspect of the present invention, in the motor according to the second aspect, the gear housing integrally includes a housing portion that houses the control circuit member, and a base portion of the control circuit member is disposed in the housing portion. The gist is to be supported by the brush holder.

  According to this configuration, the control circuit member is accommodated in the accommodating portion provided in the gear housing, and the base portion of the control circuit member is supported with respect to the brush holder in the accommodating portion. Thereby, sufficient protection of the control circuit member is possible.

  According to a fifth aspect of the present invention, in the motor according to any one of the first to fourth aspects, the base portion is made of resin, and the terminal is embedded in the base portion made of resin. The gist.

According to this configuration, since the terminal is embedded and held in the base portion by insert molding, it is not necessary to provide labor and a mounting site for mounting the terminal on the base portion.
A sixth aspect of the present invention is the motor according to any one of the first to fifth aspects, wherein the base portion holds a rotation sensor that detects the rotation of the motor body. To do.

According to this configuration, since the rotation sensor is integrally held on the base portion, it is not necessary to separately provide a means for holding the rotation sensor.
According to a seventh aspect of the present invention, in the motor according to the sixth aspect, the base portion is provided with an extending piece that holds the rotation sensor at a tip, and the extending piece is the motor main body. The gist of the present invention is that it has a curved shape so as to bypass a screw used when assembled with the gear housing.

  According to this configuration, the extending piece of the base portion that holds the rotation sensor at the tip is formed in a curved shape so as to bypass a screw (screw hole) used when the motor body and the gear housing are assembled. That is, it is possible to favorably assemble the motor body and the gear housing with the screw by bending the extending piece so that the screw is positioned at a suitable position.

The invention according to claim 8 is the motor according to any one of claims 1 to 7, wherein the drive control IC is integrally provided with a heat radiating member.
According to this configuration, since the heat dissipation member is integrally provided in the drive control IC, the heat generated in the drive control IC is efficiently released from the heat dissipation member, and the cooling effect of the drive control IC is enhanced.

  According to a ninth aspect of the present invention, in the motor according to the eighth aspect, the heat dissipation member provided integrally with the drive control IC is disposed apart from a facing member facing the heat dissipation member. The gist.

According to this configuration, since the heat radiating member of the drive control IC is disposed away from the facing member facing the heat radiating member, heat is radiated well from the heat radiating member.
According to a tenth aspect of the present invention, there is provided a motor main body including a brush holder that holds a power supply brush, a gear housing that houses a speed reduction mechanism that decelerates and outputs rotation generated in the motor main body, and a drive control IC. A motor having a control circuit member for controlling the rotation drive of the main body, the control circuit member including a base portion for holding a terminal for electrical connection between the drive control IC and the brush holder The gist is that the motor main body and the gear housing are assembled in a state where the base portion is supported with respect to the brush holder.

  According to the same configuration, the control circuit member equipped with the drive control IC for controlling the motor is such that the terminal for holding the electrical connection between the drive control IC and the brush holder is held in the base portion. The part is supported with respect to the brush holder. And a motor is comprised by assembling | attaching a motor main body and a gear housing in the state in which the base part of the control circuit member was supported with respect to the brush holder. In the motor configured as described above, since the base portion of the circuit member is supported by the brush holder separately from the electrical connection portion between the terminal on the control circuit member side and the brush holder side, to the electrical connection portion The mechanical stress is reduced.

  According to an eleventh aspect of the present invention, a motor body including a brush holder that holds a power supply brush, a gear housing that houses a reduction mechanism that decelerates and outputs rotation generated in the motor body, and rotational drive of the motor body are controlled. And a control circuit member having a base portion that holds a terminal that holds a terminal for electrical connection between the drive control IC and the brush holder. The gist is that the motor main body and the gear housing are assembled in a state where the base portion of the control circuit member is supported by the brush holder.

  According to the same configuration, the base part of the circuit member is supported by the brush holder separately from the electrical connection portion between the terminal on the control circuit member side and the brush holder side, and the motor body and the gear housing are assembled. Mechanical stress on the electrical connection is reduced.

  Therefore, according to the present invention, it is possible to provide a motor and a method of manufacturing the motor that can reduce mechanical stress applied to the electrical connection portion of the control circuit member and prevent the occurrence of disconnection failure. .

(First embodiment)
Hereinafter, a first embodiment in which the present invention is embodied in a motor for a power window device in a vehicle will be described with reference to the drawings.

As shown in FIGS. 1 and 2, the motor 1 according to the present embodiment includes a motor main body 2 that is rotationally driven, and a speed reduction unit 3 that decelerates and outputs the rotation generated in the motor main body 2.
The motor body 2 includes a yoke housing (hereinafter simply referred to as a yoke) 4 formed in a flat, substantially bottomed cylindrical shape, a pair of magnets 5 fixed to the inner surface of the yoke 4, and is rotatable within the yoke 4. A supported armature (armature) 6, a brush holder 7, and a pair of power supply brushes 8 are provided.

  The brush holder 7 is made of a resin material, and includes a holder main body 7a, a flange portion 7b, an extending portion 7c, and a circuit housing portion 7d. The holder body 7 a is formed so as to be substantially accommodated in the opening of the yoke 4. A bearing 9 is fixed to the central hole of the holder body 7a, and the tip end side of the rotary shaft 10 of the armature 6 is rotatably supported by the bearing 9. A power supply brush 8 is held on the inner side of the yoke 4 in the holder main body 7 a, and the power supply brush 8 is in press contact with a commutator 11 fixed to the rotating shaft 10.

  The flange portion 7b is extended to the holder body 7a in a flange shape (outward in the radial direction with the rotation shaft 10 as an axis center). The extending portion 7c extends from the outer peripheral portion of the flange portion 7b along the flat surface 4a of the yoke 4 (in the direction in which the wheel accommodating portion 21c extends with respect to a worm accommodating portion 21b in the gear housing 21 described later). Formed. A circuit accommodating portion 7d for accommodating a control circuit member 25, which will be described later, for controlling the rotational drive of the motor body 2 is formed at the distal end portion of the extending portion 7c. Incidentally, the circuit accommodating part 7d is extended in the same direction as the extension direction from the worm accommodating part 21b of the wheel accommodating part 21c in the gear housing 21.

  As shown in FIG. 3, the circuit accommodating portion 7d has an accommodating concave portion 7e having a substantially rectangular cross section, and the entire upper side of the control circuit member 25 is accommodated in the accommodating concave portion 7e. Mounting pieces 7f for holding the four corners of the base portion 31 of the control circuit member 25 extending toward the opening side of the housing recess 7e are provided at four predetermined locations on the inner surface of the housing recess 7e. In the circuit housing part 7d (brush holder 7) in which the control circuit member 25 is housed, a metal cover 26 having a housing recess 26a for housing the remaining part of the control circuit member 25 has its mounting pieces 26b, 26c. The cover 26 closes the opening of the circuit accommodating portion 7d (accommodating recess 7e).

  As shown in FIGS. 1 and 2, the circuit housing portion 7 d is provided with a connector case portion 7 g having a substantially rectangular tube shape along the axial direction of the rotating shaft 10. A plurality of connection terminals 35a of a connector main body 35 provided in the control circuit member 25 are inserted into the connector case portion 7g, and the connector portion 36 of the motor 1 is configured by these.

  The opening of the flange part 7b, the extension part 7c, and the circuit accommodating part 7d (accommodating concave part 7e) of the brush holder 7 is covered with a seal member 15 made of an elastic material such as an elastomer. That is, the flange portion 7b and the extension portion 7c covered with the seal member 15 are in contact with the opening portion of the yoke 4 and the opening portion of the fixing portion 21a of the gear housing 21 to which the yoke 4 is fixed, and both the opening portions are sealed. To do. The opening portion of the circuit housing portion 7d covered with the seal member 15 contacts the opening portion of the cover 26 that closes the circuit housing portion 7d, and seals the opening portion.

  A plurality of terminals 12 made of a metal plate material are embedded in the brush holder 7 by insert molding. A base end portion of the terminal 12 is exposed on the inner side of the yoke 4 in the holder main body 7a, and is electrically connected to the power supply brush 8 through a pigtail. The connection terminal portion 12a at the tip of the terminal 12 protrudes into the circuit accommodating portion 7d (accommodating recess 7e) and is electrically connected to the control circuit member 25.

The speed reduction unit 3 includes a gear housing 21, a worm shaft 22, a worm wheel 23, and a clutch 24.
The gear housing 21 is made of a resin material, and includes a fixed portion 21a, a worm accommodating portion 21b, and a wheel accommodating portion 21c. The fixing portion 21 a is formed in a shape corresponding to the flange portion 4 b formed in the opening of the yoke 4, and the flange portion 4 b is fixed to the fixing portion 21 a with a screw 27. At this time, the fixing portion 21a holds the flange portion 7b and the extension portion 7c of the brush holder 7 together with the flange portion 4b with the seal member 15 interposed therebetween, and the seal member 15 opens the opening portion of the yoke 4 and the fixing portion 21a. The sealing property of the opening is ensured.

  The worm accommodating portion 21b is formed to extend in a cylindrical shape on the extension line of the rotary shaft 10, and supports the worm shaft 22 in a rotatable manner therein. A clutch 24 for drivingly connecting the worm shaft 22 and the rotary shaft 10 is provided on the motor main body 2 side in the worm housing portion 21b. The clutch 24 operates to lock the rotation of the worm shaft 22 so that the driving force from the rotating shaft 10 is transmitted to the worm shaft 22 and conversely, the driving force from the worm shaft 22 is not transmitted to the rotating shaft 10. That is, the clutch 24 is provided to prevent the rotation of the motor 1 due to the force applied from the load side, that is, to prevent the window glass (not shown) from being opened unexpectedly.

  Incidentally, when assembling the motor main body 2 (yoke 4) and the speed reduction unit 3 (gear housing 21) (see FIG. 2), the drive side rotating body 24a constituting the clutch 24 is mounted on the tip of the rotating shaft 10 in advance. Is done. Simultaneously with the assembly of the motor main body 2 and the speed reduction portion 3, the drive side rotating body 24a is inserted into the main body portion of the clutch 24 so that the clutch 24 is assembled. A ring-shaped sensor magnet 24b is mounted on the driving side rotating body 24a so as to rotate integrally, and detects the rotating speed of the rotating body 24a, that is, the rotating shaft 10 rotating together with the rotating body 24a. Is for.

  The wheel accommodating portion 21c is formed so as to extend from the worm accommodating portion 21b into a disk shape, and supports the worm wheel 23 rotatably therein. The flat surface 21d of the wheel accommodating portion 21c is formed along the flat surface 4a of the yoke 4, and the gear housing 21 is configured to be thin with the yoke 4, so that the motor 1 is thinned. The worm accommodating portion 21b and the wheel accommodating portion 21c are partially communicated with each other, and the worm shaft 22 and the worm wheel 23 are engaged with each other at the communicating portion. The output shaft 23a connected to the worm wheel 23 is drivingly connected to a window regulator (not shown) for opening and closing the window glass, and the worm shaft 22 and the worm wheel are driven by the rotation of the motor body 2 based on the control of the control circuit member 25. The window regulator is actuated by rotating the output shaft 23a through 23, and the window glass is opened and closed.

  More specifically, the control circuit member 25 that performs opening / closing control of the window glass will be described. The control circuit member 25 has a base portion 31 that is formed of a resin material in a substantially plate shape. The base portion 31 has mounting surfaces 31a and 31b on the front and back, respectively, and the mounting recesses so that the mounting surfaces 31a and 31b are orthogonal to the flat surface 4a of the yoke 4 and the flat surface 21d of the wheel storage portion 21c. 7e, 26a, and is held by a mounting piece 7f provided in the housing recess 7e.

  A choke coil 32 and a plurality of capacitors 33 and 34 are mounted on the mounting surface 31 a on the cover 26 side of the base portion 31. The choke coil 32 and the capacitors 33 and 34 are provided in order to suppress electromagnetic noise caused by the sliding contact of the power supply brush 8 and PWM control by the drive control IC 41 described later.

  Further, a connector main body portion 35 is provided on the mounting surface 31a so as to support a plurality of connection terminals 35a. Each connection terminal 35a of the connector main body 35 is inserted into a connector case portion 7g provided in the circuit accommodating portion 7d, and these constitute a connector portion 36 of the motor 1. A vehicle body side connector (not shown) is attached to the connector portion 36 along the axial direction of the rotary shaft 10, and power is supplied from the vehicle body side.

  The mounting surface 31 a is provided with a connection terminal portion 37 for connecting to the connection terminal portion 12 a protruding into the circuit housing portion 7 d of the brush holder 7. Due to the connection between the connection terminal portion 37 and the connection terminal portion 12 a on the brush holder 7 side, the power supplied from the vehicle body side through the connector portion 36 is supplied to the power supply brush 8 of the brush holder 7 through the control circuit member 25. It has become so.

  A drive control IC 41 is mounted on the mounting surface 31b of the base portion 31 on the cover 26 side (gear housing 21 side). As shown in FIG. 3, the drive control IC 41 includes a substantially rectangular flat plate-shaped IC body 41 a and a plurality of lead terminals 41 b led out along the plane longitudinal direction of the IC body 41 a. The IC main body 41a includes a drive circuit configured by a power MOSFET or the like that supplies a drive current to the motor main body 2, a control circuit that performs processing such as PWM control and pinch prevention control by window glass, etc. It is comprised by the multichip, and it is comprised by resin-molding it. The lead terminal 41b is connected to a circuit inside the IC main body 41a. Incidentally, a plurality of terminals 38 are embedded in the base portion 31 by insert molding, and lead terminals 41b are welded and connected to predetermined portions of the terminals 38. Further, the choke coil 32 and the capacitors 33 and 34 are connected to the terminal 38, and a connection terminal portion 37 for connecting to the connection terminal 35a of the connector portion 36 and the brush holder 7 is integrally provided.

  Further, as shown in FIG. 3, the base portion 31 is formed with an extending piece 31c extending to the vicinity of the rotating shaft 10, more specifically, to the vicinity of the sensor magnet 24b of the driving side rotating body 24a constituting the clutch 24. The Hall IC 42 is mounted on the tip of the extending piece 31c. Of the screw holes 4c1 to 4c3 for insertion of the screws 27 provided in the flange portion 4b of the yoke 4, in the screw hole 4c1 located in the vicinity of the extending piece 31c, the screw hole 4c1 is the center in the width direction. It is provided close to the department. The extending piece 31c has a curved shape so as to bypass the screw hole 4c1. That is, the extending piece 31c is curved so that the screw hole 4c1 can be disposed at a position closer to the center in the width direction in order to reduce the number of screws 27.

  The Hall IC 42 at the tip of the extension piece 31 c is welded to a predetermined portion of the terminal 38 in the base portion 31, and is connected to the drive control IC 41 through the terminal 38. The Hall IC 42 detects the rotational position of the rotating body 24a, that is, the rotating shaft 10 that rotates together with the rotating body 24a based on the magnetic field change of the sensor magnet 24b that rotates together with the driving side rotating body 24a, and detects the rotation. The signal is output to the drive control IC 41.

  Then, the drive control IC 41 detects the rotation position of the rotating shaft 10, that is, the opening / closing position of the window glass, based on the rotation detection signal from the Hall IC 42, or determines the rotation speed of the rotating shaft 10, that is, the opening / closing speed of the window glass. Detected. Based on these detections and the like, the drive control IC 41 performs PWM control of the motor 1 (motor body 2), pinching prevention control by window glass, and the like.

  In addition, a heat sink 43 having a metal rectangular plate shape slightly smaller than the control IC 41 is fixed to the lower surface (on the cover 26 side) of the drive control IC 41. The heat sink 43 is disposed at a position slightly separated from the cover 26 side. The heat sink 43 efficiently absorbs and dissipates heat generated by the control IC 41 when the motor 1 is driven, that is, when the drive control IC 41 is driven, and cools the control IC 41.

  The control circuit member 25 on which the drive control IC 41 is mounted is mounted on the mounting piece 7f in the circuit housing portion 7d of the brush holder 7, and the connection terminal portion 37 is connected to the connection terminal portion 12a on the brush holder 7 side. Thereafter, a cover 26 is attached to the circuit housing portion 7d, and then the motor body 2 and the speed reduction portion 3 are assembled so as to sandwich the brush holder 7 to assemble the motor 1.

Next, characteristic actions and effects of the present embodiment will be described.
(1) The control circuit member 25 mounted on the drive control IC 41 for controlling the motor 1 is such that a terminal 38 for electrical connection between the drive control IC 41 and the brush holder 7 is held on the base portion 31. The base portion 31 is mounted on the mounting piece 7 f of the brush holder 7 and supported by the brush holder 7. Incidentally, the motor 1 is configured by assembling the motor body 2 and the gear housing 21 in a state where the base portion 31 of the control circuit member 25 is supported with respect to the brush holder 7. In the motor 1 of the present embodiment configured as described above, the circuit member 25 is separate from the electrical connection portions (connection terminal portions 37 and 12a) between the terminal 38 on the control circuit member 25 side and the brush holder 7 side. Since the base portion 31 is supported by the brush holder 7, mechanical stress on the electrical connection portion can be reduced. In addition, since the control circuit member 25 is stably supported with respect to the brush holder 7, mechanical stress on the electrical connection portion between the drive control IC 41 (lead terminal 41 b) and the terminal 38 can be reduced. . Thereby, occurrence of disconnection failure or the like can be prevented in advance.

  (2) Since the control circuit member 25 is disposed between the brush holder 7 and the gear housing 21, it is easy to dispose the control circuit member 25 between the gear housing 21 and the brush holder 7 having a relatively large degree of freedom in shape.

  (3) The control circuit member 25 is accommodated in the circuit accommodating portion 7d provided in the brush holder 7, and the base portion 31 of the control circuit member 25 is supported with respect to the brush holder 7 in the accommodating portion 7d. Thereby, the control circuit member 25 can be sufficiently protected.

  (4) Since the terminal 38 is embedded and held in the base portion 31 of the control circuit member 25 by insert molding, it is not necessary to provide labor or a mounting site for mounting the terminal 38 on the base portion 31.

(5) Since the Hall IC 42 as the rotation sensor is integrally held on the base portion 31 of the control circuit member 25, it is not necessary to separately provide a means for holding the Hall IC 42.
(6) The extending piece 31c of the base 31 that holds the Hall IC 42 at the tip is formed in a curved shape so as to bypass the screw 27 (screw hole 4c1) used when the motor body 2 and the gear housing 21 are assembled. ing. That is, the extension piece 31c is curved so that the position of the screw 27 (screw hole 4c1) is at a suitable position near the center in the width direction, so that the assembly of the motor body 2 and the gear housing 21 can be performed with the screw 27. Can be performed satisfactorily.

  (7) Since the drive control IC 41 of the control circuit member 25 is integrally provided with a heat sink 43 as a heat radiating member, the heat generated in the drive control IC 41 is efficiently released from the heat sink 43, and the cooling effect of the drive control IC 41 is increased. Can be high.

  (8) Since the heat sink 43 of the drive control IC 41 is disposed away from the facing member facing the heat sink 43, in this embodiment, the cover 26, the heat sink 43 can be radiated well from the heat sink 43.

(Second Embodiment)
A second embodiment in which the present invention is embodied in a motor for a power window device in a vehicle will be described below with reference to the drawings.

As shown in FIG. 4, the motor 101 according to the present embodiment includes a motor main body 102 that is driven to rotate, and a speed reduction unit 103 that outputs the rotation generated in the motor main body 102 at a reduced speed.
As shown in FIGS. 4 and 5, the motor main body 102 includes a yoke housing (hereinafter simply referred to as a yoke) 104 formed in a flat, substantially bottomed cylindrical shape, and a pair of magnets 105 fixed to the inner surface of the yoke 104. (See FIG. 5), an armature (armature) 106 rotatably supported in the yoke 104, a brush holder 107, and a pair of power supply brushes 108.

  The brush holder 107 is made of a resin material, and a holder body 107a, a flange portion 107b, an extension portion 107c, a connector portion 107d, and a support portion 107e are integrally formed.

  The holder main body 107 a is formed so as to be substantially accommodated in the opening of the yoke 104. A bearing 109 is fixed to the central hole of the holder main body 107a, and the front end side of the rotating shaft 110 of the armature 106 is rotatably supported by the bearing 109. The tip of the rotating shaft 110 protrudes to the outside of the yoke 104, and a sensor magnet 110a is fixed to the protruding portion through a metal plate. A power supply brush 108 is held on the inner side of the yoke 104 in the holder main body 107 a, and the power supply brush 108 is in pressure contact with a commutator 111 fixed to the rotating shaft 110.

  The flange portion 107b extends from the holder main body 107a in a flange shape (outward in the radial direction with the rotation shaft 110 as an axis center). The extending portion 107c is on one side (the right side in FIGS. 4 and 5) along the flat surface 104a of the yoke 104 in the flange portion 107b (see FIG. 4, a plane parallel to the paper surface in FIGS. 4 and 5). It is formed so as to protrude from the end portion in the external direction (outside in the radial direction), and a connector portion 107d is formed at the tip portion. The connector portion 107d is formed so that an external connector (not shown) can be fitted from the orthogonal direction of the flat surface 104a (the back side of the paper surface in the direction orthogonal to the paper surface in FIGS. 4 and 5). The support portion 107e is formed so as to extend in the axial direction along the rotation shaft 110 from the extension portion 107c.

  A plurality of brush side terminals 112 and connector side terminals 113 are embedded in the brush holder 107 (insert molding). The brush side terminal 112 extends from the inside of the yoke 104 in the holder main body 107a to the extending portion 107c, and the power supply brush 108 is electrically connected to the base end portion of the terminal 112 via a pigtail. . The connector side terminal 113 extends from the connector portion 107d to the extension portion 107c, and the base end portion of the terminal 113 is exposed at the connector portion 107d to form an external connection terminal 113a, and the external connector is fitted into the connector portion 107d. By being attached, it is electrically connected to the terminal of the external connector.

  Further, the respective tip end portions of the brush side terminal 112 and the connector side terminal 113 are projected (exposed) as the internal connection terminals 114 from the support portion 107e in the axial direction (downward in FIG. 5) of the motor body 102. A plurality of internal connection terminals 114 are provided, and are arranged in parallel along the orthogonal direction of the flat surface 104a (the orthogonal direction in FIG. 5). In FIG. 5, only one internal connection terminal 114 is shown because the internal connection terminals 114 are juxtaposed in the direction perpendicular to the paper surface.

  Further, in the brush holder 107, the flange portion 107b, the extending portion 107c, and the connector portion 107d are substantially covered with a seal member 115 made of an elastomer except for a portion corresponding to the external connection terminal 113a of the connector portion 107d.

The speed reduction unit 103 includes a gear housing 121, a worm shaft 122, a worm wheel 123, and a clutch 124 (see FIG. 5).
The gear housing 121 is made of a resin material, and includes a fixed portion 121a, a worm accommodating portion 121b, a wheel accommodating portion 121c, and a circuit accommodating portion 121d. The fixing portion 121a is formed in a shape corresponding to the flange portion 104b formed in the opening portion of the yoke 104, and is fixed to the flange portion 104b with a screw 127. Together with the flange portion 104b, the flange portion 107b of the brush holder 107 is fixed. (Via the seal member 115).

  The worm accommodating portion 121b is formed to extend in a cylindrical shape on the extension line of the rotating shaft 110, and supports the worm shaft 122 rotatably therein. Further, a clutch 124 (see FIG. 5) for drivingly connecting the worm shaft 122 and the rotating shaft 110 is provided on the motor main body 102 side in the worm housing portion 121b. The clutch 124 operates to lock the rotation of the worm shaft 122 so that the driving force from the rotating shaft 110 is transmitted to the worm shaft 122, and conversely, the driving force from the worm shaft 122 is not transmitted to the rotating shaft 110. That is, the clutch 124 is provided to prevent the rotation of the motor 101 due to the force applied from the load side, that is, to prevent the window glass (not shown) from opening unexpectedly.

  The wheel accommodating part 121c is formed in a flat disk shape in a direction orthogonal to the worm accommodating part 121b, and supports the worm wheel 123 rotatably therein. The flat surface 121g of the wheel accommodating portion 121c is formed along the flat surface 104a of the yoke 104, and the gear housing 121 is formed thin together with the yoke 104, so that the motor 101 is thinned. The worm accommodating portion 121b and the wheel accommodating portion 121c are partially communicated with each other, and the worm shaft 122 and the worm wheel 123 are engaged with each other at the communicating portion. The output shaft 123 a connected to the worm wheel 123 is drivingly connected to a window regulator (not shown) that opens and closes the window glass, and the worm shaft 122 and the worm wheel are driven by rotation of the motor main body 102 based on the control of the control circuit member 125. When the output shaft 123a rotates through 123, the window regulator is operated, and the window glass is opened and closed.

  The circuit housing part 121d is provided on the opposite side of the wheel housing part 121c (as the center) with respect to the worm housing part 121b, and a control circuit member 125 mounted on the brush holder 107 is provided inside the rotating shaft 110 inside. An accommodation recess 121e is formed to be inserted and accommodated along the axial direction. That is, the circuit accommodating portion 121d (accommodating recess 121e) is open to the motor body 102 side (brush holder 107 side), and the opposite side in the axial direction is closed.

  As shown in FIG. 6, guide grooves 121 f for inserting and guiding both side edges of the base portion 131 of the control circuit member 125 are provided along the axial direction on a pair of opposing inner side surfaces of the circuit accommodating portion 121 d (accommodating recess 121 e). Is formed. The guide grooves 121f guide and guide both side edges of the control circuit member 125 to restrict movement of the control circuit member 125 in the circuit housing portion 121d even when the motor 101 receives an impact, vibration, or the like from the outside. Is provided.

  Here, the control circuit member 125 will be described more specifically. As shown in FIG. 5, the control circuit member 125 includes a drive control IC 132, a Hall IC 133, and the like in the base portion 131.

  The base part 131 is formed in a substantially plate shape with a resin material, and an abutting part 131c that abuts in the axial direction against the abutting surface 107f provided on the support part 107e of the brush holder 107 is positioned. Have. Further, in the vicinity of the abutting part 131c of the base part 131, the base part 131 is fitted in a mounting recess 107g provided in the supporting part 107e so that the abutting part 131c abuts against the contact surface 107f. The base portion 131, that is, a mounting protrusion 131 d for holding the control circuit member 125 is provided.

  A drive control IC 132 is mounted on the mounting surface 131 a on the worm shaft 122 side of the base portion 131. The drive control IC 132 includes a substantially rectangular flat plate-shaped IC main body 132a and a plurality of lead terminals 132b led out along the plane longitudinal direction of the IC main body 132a. The IC main body 132a includes a drive circuit configured by a power MOSFET or the like that supplies a drive current to the motor main body 102, a control circuit that performs processing such as PWM control and pinch prevention control by window glass, or the like. It is comprised by the multichip, and it is comprised by resin-molding it. The lead terminal 132b is connected to a circuit inside the IC main body 132a. Incidentally, a plurality of terminals 134 are embedded in the base portion 131 by insert molding, and lead terminals 132b are welded and connected to predetermined portions of the terminals 134. In the drive control IC 132, a connection terminal portion 134a which is a part of the terminal 134 for connecting to the brush holder 107 is projected (exposed) from the surface of the base portion 131 opposite to the mounting surface 131a. The internal connection terminal 114 extending from the brush holder 107 is welded and connected.

  The base 131 is formed with an extending piece 131b extending to the vicinity of the sensor magnet 110a fixed to the rotating shaft 110, and a Hall IC 133 is mounted on the tip of the extending piece 131b. The Hall IC 133 is welded to a predetermined portion of the terminal 134 in the base portion 131 and is connected to the drive control IC 132 via the terminal 134. The Hall IC 133 detects the rotational position of the rotating shaft 110 based on the change in the magnetic field of the sensor magnet 110 a that rotates with the rotating shaft 110, and outputs the rotation detection signal to the drive control IC 132.

  Then, the drive control IC 132 detects the rotation position of the rotating shaft 110, that is, the opening / closing position of the window glass, based on the rotation detection signal from the Hall IC 133, and determines the rotation speed of the rotating shaft 110, that is, the opening / closing speed of the window glass. Detected. Based on these detections and the like, the drive control IC 132 performs PWM control of the motor 101 (motor main body 102), pinching prevention control by window glass, and the like.

  Further, a heat sink 135 having a rectangular metal plate shape slightly smaller than the control IC 132 is fixed to one side surface of the drive control IC 132. The heat sink 135 efficiently absorbs and dissipates heat generated by the control IC 132 when the motor 101 is driven, that is, when the drive control IC 132 is driven, and cools the control IC 132.

  The control circuit member 125 on which such a drive control IC 132 is mounted is mounted on the support portion 107e of the brush holder 107 by the mounting protrusion 131d and the connection terminal portion 134a is connected to the internal connection terminal 114 on the brush holder 107 side. The motor 101 is assembled by assembling the motor body 102 and the speed reduction unit 103 so that the control circuit member 125 is housed in the circuit housing part 121d of the gear housing 121.

Next, characteristic actions and effects of the present embodiment will be described.
(1) The control circuit member 125 mounted on the drive control IC 132 that controls the motor 101 is such that a terminal 134 for holding an electrical connection between the drive control IC 132 and the brush holder 107 is held on the base portion 131. The base portion 131 is attached to the support portion 107 e of the brush holder 107 and supported by the brush holder 107. Incidentally, the motor main body 102 and the gear housing 121 are assembled in a state where the base portion 131 of the control circuit member 125 is supported with respect to the brush holder 107, thereby configuring the motor 101. In the motor 101 of the present embodiment configured as described above, the electrical connection portion (the connection terminal portion 134a and the internal connection terminal 114) between the terminal 134 on the control circuit member 125 side and the brush holder 107 side is separately Since the base portion 131 of the circuit member 125 is supported by the brush holder 107, mechanical stress on the electrical connection portion can be reduced. Further, since the control circuit member 125 is stably supported with respect to the brush holder 107, mechanical stress on an electrical connection portion between the drive control IC 132 (lead terminal 132b) and the terminal 134 can be reduced. . Thereby, occurrence of disconnection failure or the like can be prevented in advance.

  (2) Since the control circuit member 125 is disposed between the brush holder 107 and the gear housing 121, it is easy to dispose the control circuit member 125 between the gear housing 121 and the brush holder 107 having a relatively large degree of freedom.

  (3) The control circuit member 125 is accommodated in the circuit accommodating portion 121d provided in the gear housing 121, and the base portion 131 of the control circuit member 125 is supported by the brush holder 107 in the accommodating portion 121d. Thereby, the control circuit member 125 can be sufficiently protected.

  (4) Since the terminal 134 is embedded and held in the base portion 131 of the control circuit member 125 by insert molding, it is not necessary to provide labor or a mounting site for mounting the terminal 134 on the base portion 131.

(5) Since the Hall IC 133 which is a rotation sensor is integrally held on the base portion 131 of the control circuit member 125, it is not necessary to separately provide a means for holding the Hall IC 133.
(6) Since the drive control IC 132 of the control circuit member 125 is integrally provided with a heat sink 135 as a heat radiating member, the heat generated in the drive control IC 132 is efficiently released from the heat sink 135, and the cooling effect of the drive control IC 132 is increased. Can be high.

The embodiment of the present invention may be modified as follows.
In the first embodiment, the cover 26 for closing the opening of the circuit accommodating portion 7d that accommodates the control circuit member 25 is made of metal, but may be made of resin.

  In the first embodiment, four mounting pieces 7 f are provided on the brush holder 7 as means for supporting the base portion 31 of the control circuit member 25. Further, in the second embodiment, as a means for supporting the base portion 131 of the control circuit member 125, the brush holder 107 is provided with a support portion 107e (mainly a mounting recess 107g that fits with the mounting protrusion 131d of the base portion 131). It was. The means for supporting such a control circuit member (base portion) is not limited to these, and the shape, number, position to be provided, and the like may be changed as appropriate. In this case, it is desirable to configure the same means by changing the shape of at least one of the base portion and the brush holder.

  In each of the above embodiments, the terminals 38 and 134 are embedded in the base portions 31 and 131 of the control circuit members 25 and 125 by insert molding, but the terminal may be attached to the base portion.

  In each of the above embodiments, the Hall ICs 42 and 133 that are rotation sensors are integrally held on the base portions 31 and 131, but a rotation sensor such as a Hall IC may be held on a support member different from the base portion. .

  In each of the above embodiments, the heatsinks 43 and 135 are provided integrally with the drive control ICs 41 and 132, but may be provided separately. Further, when the drive control ICs 41 and 132 are efficiently cooled, the heat sinks 43 and 135 can be omitted.

  In each of the above embodiments, the motor 1101 for the power window device is embodied. However, for example, it may be embodied in a motor for other devices such as a sunroof device, a slide door device, and a back door device for a vehicle. Good.

It is sectional drawing of the motor assembly | attachment state in 1st Embodiment. It is sectional drawing before a motor assembly | attachment. It is a top view which shows the gear housing side surface in a brush holder. It is sectional drawing of the motor assembly | attachment state in 2nd Embodiment. It is sectional drawing before a motor assembly | attachment. It is AA sectional drawing of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2 ... Motor main body, 7 ... Brush holder, 7d ... Circuit accommodating part as an accommodating part, 8 ... Feeding brush, 21 ... Gear housing, 22 ... Worm shaft which comprises a reduction mechanism, 23 ... Worm wheel which comprises a reduction mechanism , 25 ... control circuit member, 26 ... cover as facing member, 27 ... screw, 31 ... base part, 31c ... extension piece, 38 ... terminal, 41 ... drive control IC, 42 ... Hall IC as rotation sensor, 43 DESCRIPTION OF SYMBOLS ... Heat sink as heat radiating member, 102 ... Motor main body, 107 ... Brush holder, 108 ... Brush for electric power feeding, 121 ... Gear housing, 121d ... Circuit accommodating part as accommodating part, 122 ... Worm shaft which comprises a reduction mechanism, 123 ... Worm wheel constituting the speed reduction mechanism, 125 ... control circuit member, 131 ... base part, 132 ... drive control IC, 133 ... times Hall IC as a sensor, 134 ... terminal, 135 ... heat sink as a heat radiating member.

Claims (11)

A motor body having a brush holder for holding a power supply brush;
A motor equipped with a drive control IC and a control circuit member for controlling the rotational drive of the motor body,
The control circuit member includes a base portion that holds a terminal for electrical connection between the drive control IC and the brush holder, and the base portion is supported with respect to the brush holder. motor. The motor according to claim 1,
A gear housing that houses a speed reduction mechanism that speeds down and outputs rotation generated in the motor body;
The motor according to claim 1, wherein the control circuit member is disposed between the brush holder and the gear housing. The motor according to claim 1 or 2,
The brush holder integrally has a housing portion for housing the control circuit member, and a base portion of the control circuit member is supported by the brush holder in the housing portion. The motor according to claim 2,
The gear housing integrally has a housing portion for housing the control circuit member, and a base portion of the control circuit member is supported by the brush holder in the housing portion. The motor according to any one of claims 1 to 4,
The motor is characterized in that the base part is made of resin, and the terminal is embedded in the base part made of resin. In the motor according to any one of claims 1 to 5,
A rotation sensor for detecting rotation of the motor body is held in the base portion. The motor according to claim 6, wherein
The base portion is provided with an extending piece that holds the rotation sensor at the tip,
The extension piece has a curved shape so as to bypass a screw used when the motor body and the gear housing are assembled. The motor according to any one of claims 1 to 7,
The drive control IC is integrally provided with a heat radiating member. The motor according to claim 8, wherein
The motor, wherein the heat radiating member provided integrally with the drive control IC is disposed apart from a facing member facing the heat radiating member. A motor body having a brush holder for holding a power supply brush;
A gear housing that houses a speed reduction mechanism that speeds down and outputs rotation generated in the motor body;
A motor equipped with a drive control IC and a control circuit member for controlling the rotational drive of the motor body,
The control circuit member includes a base portion that holds a terminal that establishes an electrical connection between the drive control IC and the brush holder, and the base portion is supported with respect to the brush holder, and the motor A motor characterized in that a main body and the gear housing are assembled. A motor main body having a brush holder for holding a power supply brush, a gear housing that houses a speed reduction mechanism that decelerates and outputs rotation generated in the motor main body, and a drive control IC that controls rotational driving of the motor main body are mounted and driven. A method of manufacturing a motor comprising a control circuit member having a base portion for holding a terminal for electrical connection between a control IC and the brush holder,
The motor manufacturing method, wherein the motor main body and the gear housing are assembled in a state where the base portion of the control circuit member is supported with respect to the brush holder.

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