JP4362421B2 - motor - Google Patents

Description

  The present invention relates to a motor including a control circuit member.

  Conventionally, as a motor used in a power window device or the like, a motor main body, a speed reduction mechanism for decelerating rotation of a rotating shaft in the motor main body, a speed reducing portion housed in a gear housing, and an electric circuit housed in the gear housing Some have a control circuit member having components.

As such a motor, there is a motor in which a cooling fin exposed to the outside of the gear housing is disposed so as to face the control circuit member from one side to dissipate heat generated by the control circuit member to the outside (for example, a patent Reference 1).
German Patent Application Publication No. 10020017

  However, the motor as described above has a problem that it is difficult to obtain a sufficient heat radiation effect because the cooling fin is only opposed to the control circuit member from one side. This causes the electric circuit parts of the control circuit member to break down due to heat.

  The present invention has been made to solve the above problems, and an object thereof is to provide a motor capable of efficiently radiating heat generated by a control circuit member housed in a gear housing to the outside. There is.

According to the first aspect of the present invention, a motor main body having a rotating shaft, a gear housing that is assembled to the motor main body and houses a speed reduction mechanism for reducing the rotation of the rotating shaft, and housed in the gear housing. A motor including a control circuit member having an electric circuit component, wherein the motor body has a brush holder capable of supporting a power supply brush, and the brush holder is provided with a connector portion to which an external connector is fitted. The control circuit member has a connector connection terminal that can be electrically connected to the connector portion in a state assembled to the gear housing, and the gear housing includes the control circuit member. at least partially opening so as to protrude to the outside of the gear housing is formed, the connector terminals, the formic the motor body In assembled state the control circuit member relative to the gear housing with assembling the housing, is set at a position which is exposed when viewed from the opening direction outside of the opening, in the gear housing, in order to close the opening portion A metal cover having an accommodating portion for accommodating at least a part of the control circuit member protruding to the outside is attached.

According to a second aspect of the present invention, in the motor according to the first aspect, the control circuit member is electrically connectable to the motor main body in a state assembled to the gear housing. The opening has an opening direction inclined with respect to the axial direction of the motor main body and the orthogonal direction thereof, and the main body connecting terminal assembles the gear housing to the motor main body and the gear housing. On the other hand, in the state where the control circuit member is assembled, it is set at a position exposed when viewed from the outside in the opening direction of the opening.

  According to a third aspect of the present invention, in the motor according to the second aspect, the cover or the gear housing is provided with a seal member that seals between the opening and the cover.

According to a fourth aspect of the present invention, in the motor according to the second or third aspect , the connection terminals constituted by the connector connection terminals and the main body connection terminals are arranged along the orthogonal direction of the flat surface of the gear housing. Was established .
According to a fifth aspect of the present invention, in the motor according to any one of the first to fourth aspects, the housing portion of the cover includes the electric circuit component configured to include a mold IC and a capacitor. The control circuit member is accommodated so as to surround a part thereof.

(Function)
According to the invention described in the claims, the gear housing, a metal cover that houses at least a portion of the control circuit member protruding from the opening it is attached. Since this cover accommodates at least a part of the control circuit member serving as a heat source so as to surround the control circuit member from a plurality of angles, the heat generated by the control circuit member is efficiently radiated to the outside.
Moreover, since the connector part is provided in a brush holder (it is not provided in a control circuit member), the position of a connector part is not controlled by the range according to the fixed position of the control circuit member. That is, the fixed position of the control circuit member has many restrictions on the structure accommodated in a gear housing, but the position of a connector part can be set without receiving this restriction. Therefore, the connector portion can be easily arranged at a desired position (for example, a position adjacent to the brush holder). Further, since the fixing position (fixing structure) of the control circuit member can be set without being restricted by the position of the connector portion, for example, the control circuit member can be easily arranged in a dead space in the gear housing. Become. Further, since the control circuit member has a connector connection terminal that can be electrically connected to the connector portion in a state of being assembled to the gear housing, the control circuit member is assembled to the gear housing. The connector part and the electric circuit component of the control circuit member can be easily connected.

  According to the second aspect of the present invention, the control circuit member has the main body connection terminal that can be electrically connected to the motor main body in a state assembled to the gear housing. The motor main body and the electric circuit components of the control circuit member can be easily connected in a state assembled to the gear housing. In addition, the opening direction of the opening portion is inclined with respect to the axial direction of the motor body and the orthogonal direction thereof, and the body connection terminal is exposed when viewed from the opening direction outside of the opening portion in a state where the control circuit member is assembled. Since it is set to the position, it is possible to easily perform welding of the main body connection terminal and confirmation of the connection location while making the opening portion a simple shape without a step.

  According to the third aspect of the present invention, the cover or the gear housing is provided with the seal member that seals between the opening and the cover, so that the control circuit member (electric circuit component) is prevented from getting wet. Is done. In particular, by applying this configuration to the configuration described in claim 2, the sealing member can be provided in a portion without a step, and an effect of facilitating its manufacture can be obtained.

  According to the present invention, it is possible to provide a motor that can efficiently dissipate heat generated by a control circuit member accommodated in a gear housing to the outside.

  Hereinafter, an embodiment in which the present invention is embodied in a motor 1 of a power window device in a vehicle will be described with reference to FIGS. As shown in FIG. 1, the motor 1 includes a motor main body 2 and a speed reducing unit 3 for decelerating and outputting the rotation of the motor main body 2.

  As shown in FIGS. 1 and 2, the motor main body 2 includes a yoke housing (hereinafter simply referred to as a yoke) 4 formed in a flat, substantially bottomed cylindrical shape, and a pair of magnets 5 fixed to the inner surface of the yoke 4. (See FIG. 2), an armature (armature) 6 that is rotatably supported in the yoke 4, a brush holder 7, and a pair of brushes 8.

  The brush holder 7 is made of a resin material, and a holder main body 7a, an extension portion 7b, and a connector portion 7c are integrally formed. 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. Further, a brush 8 as a power supply brush is held on the inner side of the yoke 4 in the holder body 7a, and the brush 8 is in pressure contact with a commutator 11 fixed to the rotary shaft 10. The extending portion 7b extends in a flange shape from the holder body 7a.

  The connector part 7c is provided at the tip of the extension part 7b. In detail, the connector part 7c is one side (right side in FIG.1 and FIG.2) along the flat surface 4a (surface parallel to a paper surface in FIG.1 and FIG.2) of the yoke 4 in the extension part 7b. )). And the connector part 7c is formed so that the external connector which is not shown in figure can be inserted from the orthogonal direction of the said flat surface 4a (in FIG.1 and FIG.2 is a paper surface orthogonal direction and paper surface front side).

  A plurality of brush side terminals 12 and connector side terminals 13 are insert-molded in the brush holder 7. The brush side terminal 12 extends from the inner side of the yoke 4 in the holder main body 7a to the extending portion 7b, and the internal connection terminal 12a as the tip thereof extends from the extending portion 7b in the axial direction of the motor main body 2 (in FIG. Projected (exposed) downward (downward). The brush 8 is electrically connected to the base end portion of the brush side terminal 12 through a pigtail. The connector-side terminal 13 extends from the connector portion 7c to the extending portion 7b, and an internal connection terminal 13a as a tip portion thereof protrudes from the extending portion 7b in the axial direction of the motor body 2 (downward in FIG. 2) ( Exposed). The base end portion of the connector side terminal 13 is exposed at the connector portion 7c to form an external connection terminal 13b, and the external connector is fitted into the connector portion 7c so that it is electrically connected to the terminal of the external connector. Will be. In the connector side terminal 13 of the present embodiment, a choke coil C housed in the connector portion 7c is connected between the internal connection terminal 13a and the external connection terminal 13b. The internal connection terminals 12a and 13a are arranged side by side along the orthogonal direction of the flat surface 4a (in FIG. 2, the direction orthogonal to the paper surface). In FIG. 2, only one is shown because the internal connection terminals 12a and 13a are arranged side by side in the direction perpendicular to the paper surface. Further, in the brush holder 7, the extending portion 7b and the connector portion 7c (the portion corresponding to the choke coil C) are formed on the waterproof member 14 made of elastomer except for the portion corresponding to the external connection terminal 13b of the connector portion 7c. Almost covered.

  The speed reduction unit 3 includes a gear housing 21, a worm shaft 22, a worm wheel 23, a clutch 24, a control circuit member 25, and a cover 26. In the present embodiment, the worm shaft 22 and the worm wheel 23 constitute a speed reduction mechanism.

The gear housing 21 is made of a resin material. The gear housing 21 includes a fixed portion 21a, a worm accommodating portion 21b, a wheel accommodating portion 21c, and a circuit accommodating portion 21d.
The fixing portion 21a is formed in a shape corresponding to the flange portion 4b formed in the opening of the yoke 4, and is fixed to the flange portion 4b with a screw 27. The extending portion of the brush holder 7 together with the flange portion 4b 7b is clamped (through the waterproof member 14).

  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 motor 1 from rotating due to the force applied from the load side. The clutch 24 is provided with a sensor magnet 24 a that rotates integrally with the rotary shaft 10.

  The wheel accommodating part 21c is formed in a flat disk shape in a direction orthogonal to the worm accommodating part 21b, and supports the worm wheel 23 rotatably therein. 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 wheel accommodating portion 21c is formed on the opposite side (left side in FIGS. 1 and 2) of the connector portion 7c with respect to the worm accommodating portion 21b. Further, the flat surface 21e of the wheel accommodating portion 21c is formed along the flat surface 4a (see FIG. 1) of the yoke 4, and the surface of the gear housing 21 as viewed from the orthogonal direction of the flat surface 21e is the gear housing. 21 flat surfaces.

  The circuit accommodating part 21d is a position corresponding to the internal connection terminals 12a and 13a, and is formed such that the internal connection terminals 12a and 13a are disposed therein. Specifically, the circuit housing portion 21d is formed on the opposite side of the wheel housing portion 21c with respect to the worm housing portion 21b and between the worm housing portion 21b and the connector portion 7c. The circuit housing portion 21d communicates with the motor body 2 side (the portion corresponding to the sensor magnet 24a) inside the worm housing portion 21b. In addition, an opening 21f that allows the control circuit member 25 to be inserted from the direction along the axial direction of the rotary shaft 10 is formed in the circuit housing portion 21d. The opening 21 f is formed so that at least a part of the control circuit member 25 assembled to the gear housing 21 protrudes outside the gear housing 21. In FIG. 2, the opening 21f of the present embodiment includes a part of the right side surface, a part of the left side surface, a part of the front side surface, and the back side of the paper surface in the control circuit member 25. Are formed such that a part of the surface and the lower surface (that is, five surfaces) are exposed. The opening 21f is set so that the opening direction (direction orthogonal to the opening 21f) is inclined with respect to the axial direction of the rotating shaft 10 and the orthogonal direction thereof. The opening 21f of the present embodiment is an inclined straight line connecting the connector portion 7c and the distal end side (opposite side of the motor body 2) of the worm housing portion 21b when viewed from the direction orthogonal to the flat surface of the gear housing 21 ( It is formed so that there is no step. The internal connection terminals 12a and 13a of the brush side terminal 12 and the connector side terminal 13 are arranged at positions where they are exposed (visible) when viewed from the outside in the opening direction of the opening 21f. Then, the control circuit member 25 is substantially accommodated in the circuit accommodating portion 21d (so that a part thereof protrudes from the opening 21f to the outside of the gear housing 21).

  As shown in FIG. 2 and FIGS. 3A to 3C, the control circuit member 25 includes a base member 31, a heat sink 32, a mold IC 33, a capacitor 34, a hall element 35, and a plurality of main body connection terminals and connector connection terminals. Connecting terminal 36 (see FIG. 3C) and the like. In the present embodiment, the mold IC 33, the capacitor 34, and the Hall element 35 constitute an electric circuit component. The base member 31 is made of a resin material and has a substantially plate shape. In the base member 31, a substantially plate-shaped mold IC 33 is fixed to one surface (the left surface in FIGS. 2 and 3B) via a plate-shaped heat sink 32, and the other surface (FIG. 2). And the substantially cylindrical capacitor | condenser 34 is being fixed to the surface of the right side in FIG.3 (b). In the present embodiment, the heat sink 32 and the mold IC 33 are bonded with an adhesive. In the base member 31, a Hall element 35 (see FIG. 3A) is located at a position corresponding to the sensor magnet 24a on one surface (the left surface in FIGS. 2 and 3B). It is fixed. Further, in the base member 31, the other side (the right side in FIGS. 2 and 3B) is located at a position corresponding to the brush side terminal 12 and the internal connection terminals 12 a and 13 a of the connector side terminal 13. A plurality of connection terminals 36 (see FIG. 3C) electrically connected to the mold IC 33 and the like are disposed. In the present embodiment, the control circuit member 25 does not include a relay as a drive circuit unit, and the mold IC 33 includes a power MOSFET as a drive circuit unit therein. Further, when the mold IC 33 determines that the vehicle window glass has been pinched according to the rotational speed of the sensor magnet 24a (rotating shaft 10) detected by the Hall element 35, the mold IC 33 applies to the brush 8 (motor body 2). This is a circuit for performing pinching prevention control such as supplying a reverse rotation current.

  The control circuit member 25 formed in this way protrudes into the gear housing 21 (circuit accommodating portion 21d) from the opening 21f in a state where the motor main body 2 and the speed reduction portion 3 are assembled, and a part of the control circuit member 25 protrudes to the outside. It is assembled to do. And by being assembled in this way, the plurality of connection terminals 36 can be electrically connected to the internal connection terminals 12a and 13a (the brush 8 and the connector portion 7c) of the brush side terminal 12 and the connector side terminal 13, respectively. It is arranged (to contact). Of course, in this state, the plurality of connection terminals 36 are arranged at positions that are exposed (visible) when viewed from the outside in the opening direction of the opening 21f, like the internal connection terminals 12a and 13a. Of course, in this state, the plurality of connection terminals 36 are in a direction orthogonal to the flat surfaces (flat surfaces 4a and 21e) of the gear housing 21 (in the direction orthogonal to the paper surface in FIG. 2), like the internal connection terminals 12a and 13a. Along the line. In the present embodiment, the plurality of connection terminals 36 that are exposed when viewed from the outside in the opening direction of the opening 21f are laser-welded and electrically connected to the internal connection terminals 12a and 13a, respectively. Further, in this state, the mold IC 33 is provided such that the flat surface 33a thereof is along a direction orthogonal to the flat surfaces (flat surfaces 4a and 21e) of the gear housing 21 (the direction orthogonal to the paper surface in FIG. 2). In the present embodiment, in this state, a part of the mold IC 33 and a part of the capacitor 34 which are a part of the control circuit member 25 are disposed so as to protrude outside the circuit housing part 21d (opening part 21f).

  A metal cover 26 is fixed to the opening 21f of the gear housing 21 so as to close the opening 21f in a state where the control circuit member 25 is assembled. The cover 26 has an accommodating portion 26a that can accommodate a part of the control circuit member 25 (a part of the mold IC 33 and a portion of the capacitor 34), and is formed in a shape having an opening corresponding to the opening 21f. The Note that the cover 26 of the present embodiment is set so that the inner wall surface of the accommodating portion 26a surrounds a part of the control circuit member 25 from five angles (opposing from five directions). Further, the five directions in the present embodiment are a right direction, a left direction, a front side, a back direction, and a down direction in FIG. A point caulking portion 26 b is formed at the opening of the cover 26 and is fixed to the gear housing 21 by point caulking.

  In the motor 1 configured as described above, the control circuit member 25 can be assembled into the gear housing 21 from the opening 21f in a state where the motor main body 2 and the speed reduction portion 3 are assembled. The control circuit member 25 having a different electrical circuit component can be assembled to the one assembled with 3 (excluding the control circuit member 25). That is, a motor with various specifications (specifications with different configurations of electric circuit components) can be easily obtained while using a common member that the motor body 2 and the speed reduction unit 3 are assembled (except for the control circuit member 25). Therefore, it is easy to manage the parts, and the manufacturing cost can be reduced.

  The motor 1 of the power window device configured as described above is disposed between an inner panel and an outer panel of a vehicle door (not shown), and the flat surfaces (flat surfaces 4a and 21e) are fixed to face the inner panel. . In this state, the connector 7c (external connection terminal 13b) is fitted with an external connector connected to the power supply device from the door trim side through a connector hole formed in the inner panel. At this time, the connector hole is closed at a portion corresponding to the connector portion 7c of the waterproof member 14, and the liquid is prevented from entering the door trim side between the inner panel and the outer panel.

Next, characteristic effects of the above embodiment will be described below.
(1) The gear housing 21 is provided with a metal cover 26 that accommodates a part of the control circuit member 25 protruding from the opening 21f. Since this cover 26 is housed so as to surround a part of the control circuit member 25 serving as a heat source from a plurality of angles, the heat generated by the control circuit member 25 is efficiently radiated to the outside. Therefore, for example, it is possible to reduce the destruction of the electric circuit components included in the control circuit member 25 due to heat.

  (2) The control circuit member 25 includes a connection terminal 36 that can be electrically connected to the motor body 2 (brush 8) and the connector portion 7c in a state where the control circuit member 25 is assembled to the gear housing 21. Therefore, it is possible to easily connect the motor body 2 (brush 8) and the connector portion 7c and the electric circuit components (mold IC 33, etc.) of the control circuit member 25 with the control circuit member 25 assembled to the gear housing 21. it can.

  Further, the opening 21f is set so that the opening direction (direction orthogonal to the opening 21f) is inclined with respect to the axial direction of the motor body 2 (rotating shaft 10) and the orthogonal direction thereof. In addition, the connection terminal 36 is arranged at a position where it is exposed (visible) when viewed from the outside in the opening direction of the opening 21f, in the same manner as the internal connection terminals 12a and 13a, with the control circuit member 25 assembled. By doing in this way, it becomes possible to perform the laser welding of the connection terminal 36 and the confirmation of the connection location easily, making the opening part 21f the simple shape without a level | step difference.

  (3) Since the connector portion 7 c is provided on the brush holder 7 (not provided on the control circuit member), the position of the connector portion 7 c is not restricted to a range corresponding to the fixed position of the control circuit member 25. That is, the fixed position of the control circuit member 25 has many restrictions on the structure accommodated in the gear housing 21, but the position of the connector part 7c can be set without receiving this restriction. Therefore, the connector part 7c can be easily arranged at a desired position, in the present embodiment, at the side of the connecting part between the yoke 4 and the gear housing 21 (position adjacent to the brush holder 7). Further, the fixed position (fixed structure) of the control circuit member 25 can be set without being limited to the position of the connector portion 7c. That is, as in the present embodiment, the control circuit member 25 can be easily disposed in the dead space in the gear housing 21 between the worm housing portion 21b and the connector portion 7c. Therefore, the motor 1 can be downsized.

  (4) The plurality of connection terminals 36 are arranged in parallel along the direction perpendicular to the flat surfaces (flat surfaces 4a and 21e) of the gear housing 21 (in the direction perpendicular to the paper surface in FIG. 2), like the internal connection terminals 12a and 13a. Therefore, it is possible to prevent the plurality of connection terminals 36 from increasing the projected area when viewed from the direction perpendicular to the flat surface of the gear housing 21. Moreover, the connection work by laser welding can be easily performed by arranging in parallel.

  (5) Since the flat surface 33a of the mold IC 33 is provided along the direction orthogonal to the flat surfaces (flat surfaces 4a and 21e) of the gear housing 21, the mold IC 33 is provided in the gear housing. It is prevented that the projection area seen from the orthogonal direction of 21 flat surfaces increases.

The above embodiment may be modified as follows.
The gear housing 21 (circuit housing portion 21d) of the above embodiment can be changed to another shape if an opening is formed so that at least a part of the control circuit member protrudes outside the gear housing 21. Also good. If the cover 26 is made of metal having a housing portion that is fixed so as to close the opening 21f and houses at least a part of the control circuit member that protrudes to the outside, the cover 26 can be changed to another shape. May be.

  For example, it may be changed as shown in FIG. That is, in the example shown in FIG. 4, the opening 21 g is slightly different from the above embodiment (opening 21 f), and in FIG. 4, a part of the right side surface of the control circuit member 41 and the front side surface of the sheet. , A part of the back surface of the paper, and a lower surface (that is, four surfaces) are exposed. In this example, the engaging claw 21i is formed on the outer surface of the flat surface in the circuit housing portion 21h. In the control circuit member 41 in this example, the mold IC 43 is fixed to the base member 42 and the heat sink 44 is fixed to the mold IC 43 with an adhesive, contrary to the above embodiment. In addition, the metal cover 45 in this example includes an engaged recess 45a that is engaged with the engaging claw 21i. That is, the cover 45 is fixed to the gear housing 21 by engaging the engaged recess 45a with the engaging claw 21i. The cover 45 is provided with a seal member 45b for sealing between the opening 21g and its own opening. The seal member 45b is made of butyl rubber, and is disposed over the entire opening of the cover 45 corresponding to the opening 21g. Further, the cover 45 is set so that the inner wall surface of the accommodating portion 45c surrounds a part of the control circuit member 41 from four angles (facing from four directions). Further, the four directions in this example are a right direction, a front side direction, a rear side direction, and a downward direction in FIG. Further, the cover 45 is provided with a metal contact portion that is elastically pressed and brought into contact with the mold IC 43 of the control circuit member 41 (via the heat sink 44) and a pressing piece 46 as an elastic contact portion. . In FIG. 4, the pressing piece 46 before being pressed and contacted (before assembly) is illustrated by a solid line, and the pressing piece 46 being pressed and contacted is illustrated by a two-dot chain line. Even in this case, the cover 45 accommodates the periphery of a part of the control circuit member 41 serving as a heat source so as to surround a plurality (four) of angles, so that the heat generated by the control circuit member 41 is efficiently transmitted to the outside. Dissipates heat well. In addition, since the pressing piece 46 is brought into contact with the control circuit member 41 in this way, heat radiation can be performed more efficiently. Further, rattling of the control circuit member 41 can be reduced. Further, since the pressing piece 46 has elasticity and is pressed into contact with the control circuit member 41, the control circuit member does not require high precision in each dimension or assembly (even if a dimension error or an assembly error occurs). 41, specifically, the heat sink 44 can be brought into contact with the heat sink 44 easily and reliably. In addition, since the pressing piece 46 can be elastically deformed so as to follow the control circuit member 41, even if the control circuit member 41 vibrates, it can be prevented from being damaged, and in a contact state (heat dissipation function). Can be maintained. Further, since the cover 45 is provided with a seal member 45b for sealing between the opening 21g and its own opening, the control circuit member 41 (electric circuit component) is prevented from being wetted. Since the opening 21g has a simple shape without a step, the seal member 45b can also be provided in a portion without a step, and the manufacture thereof becomes easy. Of course, the pressing piece 46 may be omitted. Of course, the heat sink 44 may be omitted, and the pressing piece 46 may be in direct pressing contact with the mold IC 43. Further, the pressing piece 46 may be changed to another elastic contact portion (for example, a wave washer or a rubber material) that is pressed against the control circuit member (mold IC).

  For example, as shown in FIG. That is, in the example shown in FIG. 5, the opening 21 j is slightly different from the above embodiment, and the opening direction (direction orthogonal to the opening 21 j) is set to coincide with the axial direction of the rotary shaft 10. Yes. Accordingly, the control circuit member (not shown) includes a part of the right side surface, a part of the left side surface, a part of the front side surface of the paper, and a part of the rear side surface of the paper in FIG. Are exposed by the same amount in the axial direction. Of course, the metal cover 51 has an accommodating portion for accommodating at least a part of the control circuit member protruding to the outside, and an opening corresponding to the opening 21j (the opening direction is the axial direction of the rotary shaft 10). Is formed in a shape having an opening that coincides with (a substantially bottomed rectangular tube shape). In FIG. 5, the cover 51 assembled to the gear housing 21 is illustrated by a solid line, and the cover 51 before being assembled is illustrated by a two-dot chain line. Even in this case, the cover 51 accommodates a part of the control circuit member serving as a heat source so as to surround a plurality of (five) angles, so that the heat generated by the control circuit member is efficiently radiated to the outside. Is done.

  Further, for example, the change may be made as shown in FIGS. That is, in the example shown in FIG. 6A, the gear housing 21 having the opening 21j of the other example (see FIG. 5) and the opening 21j similar to the cover 51 of the other example (see FIG. 5). And a resin cover 61 having a substantially bottomed rectangular tube shape made of resin and having a corresponding opening. The resin cover 61 is formed with an opening 61a having a shape cut out in the direction perpendicular to the axis (the right direction in FIG. 6A). Specifically, the opening 61a is formed so that at least a part of the control circuit member (not shown) protrudes outside the gear housing 21. Specifically, in FIG. A part of the surface on the front side of the paper surface and a part of the surface on the back side of the paper surface are formed (that is, three surfaces) are exposed. The metal cover 62 (see FIG. 6B) in this example is formed in a shape (substantially U-shaped in cross section) so as to close the opening 61a, and the inner wall surface of the housing portion 62a is controlled. The circuit member is set so as to surround a part of the circuit member from three angles (facing from three directions). Note that the three directions in this example are the right direction, the front side of the page, and the back side of the page in FIG. 6A. Even in this case, the cover 62 accommodates a part of the control circuit member serving as a heat source so as to surround a plurality of (three) angles, so that the heat generated by the control circuit member is efficiently radiated to the outside. Is done.

  In the above embodiment, the control circuit member 25 is arranged so that the connection terminal 36 comes into contact with the internal connection terminals 12a and 13a so as to be electrically connectable in a state assembled to the gear housing 21. Although it is assumed that it is electrically connected by laser welding, it may be electrically connected by other methods. For example, the connection may be made by electron beam welding or TIG welding. Further, the shape of the connection terminal 36 and the internal connection terminals 12a, 13a is set so that the connection terminal 36 and the internal connection terminals 12a, 13a are electrically connected by assembling the control circuit member 25 (for example, The shape may be changed to a (male and female) shape inserted in the axial direction. In addition, for example, even if it is assembled to the gear housing 21, the connection terminal 36 and the inner part are arranged so that they are not simply arranged so as to be connectable (so that they are connected using another member or the like). The connection terminals 12a and 13a may be changed.

In the above embodiment, the connector portion 7c is provided in the brush holder 7 (not provided in the control circuit member 25), but may be changed to a configuration provided in the control circuit member.
In the above embodiment, the internal connection terminals 12a, 13a and the plurality of connection terminals 36 are arranged along the orthogonal direction (the orthogonal direction in FIG. 2) of the flat surface (the flat surfaces 4a, 21e) of the gear housing 21. Although provided, it may be provided along other directions.

  In the above embodiment, the mold IC 33 is provided such that the flat surface 33a is provided along the orthogonal direction (in FIG. 2, the direction orthogonal to the paper surface) of the flat surface (the flat surfaces 4a and 21e) of the gear housing 21. You may provide along other directions.

  In the above embodiment, the rotary shaft 10 and the worm shaft 22 are drive-coupled via the clutch 24, but the clutch 24 is omitted and the rotary shaft 10 and the worm shaft 22 are drive-coupled (integral formation). May be.

  In the above embodiment, the choke coil C is provided in the connector portion 7c. However, the choke coil C may be provided in the control circuit member as an electric circuit component (collectively) similarly to the capacitor 34. In this way, it is possible to easily obtain a motor with different specifications of the choke coil while using a common member (a member excluding the control circuit member) in which the motor main body 2 and the speed reduction unit 3 are assembled. The capacitor 34 may be changed to a configuration provided on the connector portion 7c side.

The base member 31 (42) in the control circuit member 25 (41) of the above embodiment may be changed to a circuit board.
-The cover 26 (45, 51, 62) of the above embodiment may be provided with a breathing hole that communicates the inside and outside of the gear housing 21 (motor). If it does in this way, since hot air can be discharged | emitted, heat dissipation is performed still more efficiently. In addition, a change in atmospheric pressure inside the gear housing 21 due to heat generation during driving is reduced. Moreover, even when the opening direction of the breathing hole is set to a different direction (for example, a direction suitable for waterproofing), such as when the installation direction (door to be installed) of the motor 1 is different, only the cover is changed (the cover). These motors can be obtained by using a member other than the one as a common member. Therefore, the versatility of the gear housing 21 is improved, and the manufacturing cost of the motor can be reduced.

  -Hall element 35 with which control circuit member 25 (41) of the above-mentioned embodiment is provided may be provided in motor main part 2 or reduction part 3 side (excluding control circuit member) (for example, holder main part 7a of brush holder 7). . In this case, the Hall element terminal connected to the Hall element is provided (in parallel) in the same manner as the internal connection terminals 12a and 13a, and the control circuit member 25 (41) corresponds to the Hall element terminal. The connected terminals may be provided in the same manner as the connection terminals 36 (arranged in parallel).

  In the above embodiment, the sensor magnet 24a is provided in the clutch 24. However, the present invention is not limited to this. For example, the sensor magnet may be arranged on a metal plate and the rotary shaft may be press-fitted into the metal plate. Good. Further, for example, a sensor magnet is provided on the tip side (lower side in FIG. 2) of the worm shaft 22, and a Hall element is provided on the control circuit member 25 at a position (lower side in FIG. 2) facing the sensor magnet. May be.

  In the above-described embodiment, the motor is used in the power window device. However, the motor may be embodied in a motor for another device such as a sunroof motor or a door closer motor.

The technical idea that can be grasped from the above embodiments will be described below together with the effects thereof.
(B) pre-Symbol cover, you comprises said control circuit member abutment portion abutting. If it does in this way, shakiness of a control circuit member can be reduced. Moreover, heat dissipation can be performed more efficiently.

  (B) The motor according to (a), wherein the contact portion includes an elastic contact portion that is pressed against the control circuit member. In this way, the contact portion can be easily brought into contact with the control circuit member even if the dimensional accuracy or assembly accuracy is not high (even if a dimensional error or assembly error occurs). The rattling can be reduced. Further, even if the control circuit member vibrates, the breakage can be prevented. Further, since the elastic contact portion can be elastically deformed so as to follow the control circuit member, the contact state (heat radiation function) between the control circuit member and the contact portion can be maintained.

The top view of the motor in this Embodiment. The partial cross-section exploded view of the motor in this Embodiment. (A)-(c) Explanatory drawing for demonstrating the control circuit member of this Embodiment. The partial cross-sectional exploded view of the motor in another example. The top view of the motor in another example. (A) The top view of the motor in another example. (B) The perspective view of a cover similarly.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2 ... Motor main body, 7 ... Brush holder, 7c ... Connector part, 8 ... Brush (brush for electric power feeding), 10 ... Rotating shaft, 21 ... Gear housing, 21f, 21g, 21j, 61a ... Opening part, 22 ... Deceleration mechanism Worm shaft constituting a part, 23... Worm wheel constituting a part of the speed reduction mechanism, 25, 41... Control circuit member, 26, 45, 51, 62... Cover, 26a, 45c, 62a. 43 ... Mold IC constituting a part of the electric circuit component, 34 ... Capacitor constituting a part of the electric circuit component, 35 ... Hall element constituting a part of the electric circuit component, 36 ... Connection terminal (main body connection terminal and Connector connecting terminal), 45b... Sealing member.

Claims (5)

A motor body having a rotating shaft;
A gear housing that is assembled to the motor body and houses a reduction mechanism for reducing the rotation of the rotary shaft;
In a motor comprising a control circuit member housed in the gear housing and having an electric circuit component,
The motor body has a brush holder capable of supporting a power supply brush,
The brush holder is provided with a connector part to which an external connector is fitted,
The control circuit member has a connector connection terminal that can be electrically connected to the connector portion in a state assembled to the gear housing;
The gear housing has an opening formed so that at least a part of the control circuit member protrudes outside the gear housing,
The connector connection terminal is set to a position exposed when viewed from the outside in the opening direction of the opening in a state where the gear housing is assembled to the motor body and the control circuit member is assembled to the gear housing.
The motor , wherein the gear housing is provided with a metal cover having an accommodating portion for accommodating at least a part of the control circuit member projecting outside so as to close the opening. The motor according to claim 1,
The control circuit member has a body connection terminal that can be electrically connected to the motor body in a state assembled to the gear housing;
The opening portion has an opening direction inclined with respect to the axial direction of the motor body and the orthogonal direction thereof,
The main body connection terminal is set to a position exposed when viewed from the outside in the opening direction of the opening in a state where the gear housing is assembled to the motor main body and the control circuit member is assembled to the gear housing. A motor characterized by The motor according to claim 2,
The motor according to claim 1, wherein the cover or the gear housing is provided with a seal member that seals between the opening and the cover. The motor according to claim 2 or 3 ,
The motor is characterized in that the connection terminals composed of the connector connection terminals and the main body connection terminals are arranged side by side along a direction orthogonal to the flat surface of the gear housing . The motor according to any one of claims 1 to 4,
The motor is characterized in that the housing portion of the cover is housed so as to surround a part of the control circuit member having the electric circuit component including a mold IC and a capacitor.

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