JP5284061B2 - motor - Google Patents

Description

  The present invention relates to a motor for a power window that opens and closes a window glass of an automobile, for example.

Conventionally, this type of motor includes a motor body, a control circuit for controlling the rotation of the motor body, and a control circuit member having a control circuit case for housing the control circuit. The motor body and the control circuit case are integrated. (See, for example, Patent Document 1). In such a motor, the gear housing and the control circuit case of the motor body are respectively formed with breathing holes communicating with the outside, and each breathing hole has a pressure difference between the inside and outside of the gear housing and the control circuit case. It plays the role of eliminating. In addition, each breathing hole is subjected to a waterproofing process such as welding a waterproof sheet in order to prevent rainwater or the like from entering the gear housing or the control circuit case.
JP 2008-141912 A

  However, in the motor as described above, since the breathing hole is provided in both the gear housing and the control circuit case, both of them must be waterproofed, which makes the manufacture of the motor complicated. It was.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a motor that can be easily manufactured.

In order to solve the above-mentioned problem, the invention according to claim 1 is a gear housing for accommodating a motor part having a rotating shaft and a reduction gear assembled to the motor part to reduce the rotation of the rotating shaft. And a control circuit member having a control circuit case for accommodating the control circuit, and the motor body and the control circuit case. The motor unit is configured to be integrally assembled, and the motor part of the motor body has a brush holder for holding a power feeding brush, and the brush holder is provided with a motor side connector part, and the control circuit case, a control circuit connector portion electrically connected to said motor-side connector part in a liquid-tight state from the outside, the motor-side connector unit, the control circuit Ke Scan and is connected to the control circuit side connector portion in a sandwich state between said gear housing, on one of the gear housing and the control circuit case, the ventilation hole communicating the inside and the outside The motor-side connector part is provided with a brush-side communication hole, the control circuit-side connector part is provided with a case-side communication hole, and the gear housing has a gear housing-side communication hole connected to the inside thereof. The gear housing side communication hole, the brush side communication hole, and the case side communication hole communicate with the inside of the gear housing and the inside of the control circuit case, the breathing hole, the inside of the gear housing and The inside of the control circuit case is configured to be connected so as to allow ventilation.

In the present invention, a communication hole for communicating the inside of the inner and the control circuit case of the gear housing (gear housing side communicating hole, the brush-side communication hole, and the case-side communicating hole) is provided, the breathing holes, inside of the gear housing and The inside of the control circuit case is configured to be connected to allow ventilation. Thereby, since it is not necessary to provide the breathing hole in both the gear housing and the control circuit case, the number of waterproofing processes applied to the breathing hole can be suppressed, and the motor can be easily manufactured.
In addition, since the motor-side connector portion is sandwiched between the control circuit case and the gear housing, it is possible to ensure the liquid-tight state of each connector portion.
Moreover, since the motor side connector part is provided in a brush holder, the electrical wiring in a motor part becomes easy.

According to a second aspect of the invention, in the motor according to claim 1, wherein the gear housing, the motor unit said found assembled in the axial direction of the rotating shaft is relative, the control circuit case, the gear housing On the other hand, it is configured to be assembled from the axial direction of the rotating shaft.

In the present invention, since the control circuit case is assembled to the gear housing from the axial direction in the same manner as the assembly direction of the motor portion and the gear housing, the assembly becomes easy .

The invention described in 請 Motomeko 3 is the motor according to claim 1 or 2, wherein the ventilation hole is characterized in that provided in the gear housing of the motor body.

In this invention, while improving the versatility of the motor part in the motor main body, it is possible to easily dissipate the heat generated from the motor part to the outside from the breathing hole.
According to a fourth aspect of the present invention, in the motor according to any one of the first to third aspects, the motor main body is provided with a rotation detection sensor that detects the rotation of the rotation shaft, and the rotation detection sensor. The rotation detection signal can be output to the control circuit via the motor side connector part and the control circuit side connector part.

  In the present invention, the control circuit can be easily changed as compared with the case where the rotation detection sensor is mounted on the control circuit.

  Therefore, according to the above described invention, the motor can be easily manufactured.

Hereinafter, an embodiment in which the present invention is embodied in a motor for a power window that opens and closes a window glass of an automobile will be described with reference to the drawings.
As shown in FIG. 1, the motor 1 of the present embodiment includes a motor main body 2 and a control circuit member 3 for controlling the rotation of the motor main body 2. The motor body 2 includes a motor unit 4 that is rotationally driven and a speed reduction unit 5 that decelerates and outputs the rotation generated in the motor unit 4.

  The motor unit 4 has a yoke housing 11 formed in a substantially bottomed cylindrical shape, and a pair of magnets 12 are fixed to the inner surface of the yoke housing 11. In the yoke housing 11, a rotating shaft 13 supported by a bearing (not shown) provided at the upper end portion thereof is disposed. An armature 14 disposed inside the magnet 12 and a commutator 15 electrically connected to the armature 14 are fixed to the rotating shaft 13. Further, the motor unit 4 includes a brush holder 17 for holding a power supply brush 16 that is interposed between the yoke housing 11 and the speed reduction unit 5 and that is in sliding contact with the commutator 15.

  As shown in FIG. 2, the brush holder 17 is fitted into the opening at the lower end of the yoke housing 11 and holds the power supply brush 16, and radially outward from the holding portion 21 (in FIGS. 1 and 2). And a motor-side connector portion 22 (motor-side connector portion) extending to the left side. The holding portion 21 and the motor side connector portion 22 are integrally provided with a seal member 23 made of an elastic member such as an elastomer. The seal member 23 is formed on the outer peripheral side of the holding portion 21 so as to protrude in a flange shape, and is formed so as to extend to the motor-side connector portion 22 side and substantially cover the connector portion 22. The motor-side connector portion 22 is provided with a plurality of terminals 24 protruding upward (on the side of the axial yoke housing 11). These terminals 24 are inserted into the brush holder 17 and are electrically connected to the power supply brush 16 and the hall element 18 a provided on the brush holder 17. The hall element 18a constitutes a rotation detection sensor with a sensor magnet 18b provided so as to be integrally rotatable with the rotary shaft 13, and the rotation detection sensor (rotation direction and number of rotations) of the rotary shaft 13 is constituted by the rotation detection sensor. Etc.) can be detected.

  The speed reduction unit 5 of the motor body 2 has a gear housing 31 that is assembled to the motor unit 4 from the axial direction of the rotary shaft 13. The gear housing 31 is made of resin, and an attachment portion 32 having an opening is formed at the end of the gear housing 31 on the motor portion 4 side. The mounting portion 32 is fixed to the flange portion 11 a formed at the opening at the lower end of the yoke housing 11 with a screw 33. At the time of fixing, the seal member 23 of the brush holder 17 is clamped and fixed by the flange portion 11a of the yoke housing 11 and the mounting portion 32 of the gear housing 31 in the axial direction (vertical direction in FIGS. 1 and 2). Thereby, each opening part of the flange part 11a of the yoke housing 11 and the attachment part 32 of the gear housing 31 is sealed, respectively, and intrusion of rain water etc. is prevented.

  The gear housing 31 is formed with a shaft housing cylinder portion 34 extending in the axial direction from the opening of the mounting portion 32, and the shaft housing tube portion 34 has a worm shaft that rotates integrally with the rotating shaft 13 of the motor unit 4. 35 is accommodated rotatably. A wheel housing portion 36 that communicates with the shaft housing tube portion 34 is formed on the side of the shaft housing tube portion 34 in the gear housing 31 in the direction orthogonal to the axis. A wheel gear 37 that is rotatably supported is accommodated in the wheel accommodating portion 36, and the wheel gear 37 is engaged with the worm shaft 35. The wheel gear 37 and the worm shaft 35 constitute a reduction gear.

  One breathing hole 38 that connects the inside of the gear housing 31 to the outside is formed on the side of the shaft housing tube 34 in the gear housing 31 (on the side opposite to the wheel housing). The breathing hole 38 communicates with the shaft housing cylinder portion 34. That is, the shaft housing cylinder portion 34 and the wheel housing portion 36 communicate with the outside through the breathing hole 38. Thereby, the gear housing 31 is configured to eliminate the pressure difference between the inside and the outside. In addition, a breathable waterproof sheet 39 is welded to the breathing hole 38 to prevent rainwater or the like from entering the gear housing 31.

  As shown in FIGS. 2 and 3, a connector attachment portion 41 extending radially outward from the attachment portion 32 of the gear housing 31 is formed at the upper end portion (end portion on the motor portion 4 side) of the wheel housing portion 36. On the connector mounting portion 41, the motor side connector portion 22 of the brush holder 17 is disposed. A concave portion 41a is formed on the upper surface of the connector mounting portion 41. The concave portion 41a is recessed toward the wheel housing portion 36. The concave portion 41a has a convex portion 22a formed on the back surface (surface on the opposite terminal side) of the motor side connector portion 22. Has been inserted.

  As shown in FIGS. 1 and 2, screws for fastening the control circuit member 3 with screws are provided on both sides of the connector mounting portion 41 in the axial direction of the wheel gear 37 (the direction orthogonal to the plane of FIG. 1 and FIG. 2). Each of the fixing portions 42 is formed (only one is shown in FIGS. 1 and 2). Further, a mounting leg 43 to the vehicle body is formed in the wheel accommodating portion 36 so as to extend on the side opposite to the shaft accommodating cylindrical portion 34, and the mounting leg 43 has a pedestal portion 44 that supports the control circuit member 3. Is formed. A screw fixing portion 45 similar to the screw fixing portion 42 is formed on the pedestal portion 44.

  The control circuit member 3 includes a control circuit case 51 and a control circuit board 52 that constitutes a control circuit accommodated in the case 51. The control circuit case 51 includes a first case 53 and a second case 54 that are assembled together with screws 51a (see FIG. 2). The second case 54 is supported by the pedestal 44 of the gear housing 31, and the first case 53 is located above the second case 54 (on the side opposite to the gear housing). The first case 53 is assembled to the gear housing 31 from the axial direction of the rotary shaft 13 and fixed by three screws 55. That is, the first case 53 is assembled in the same direction as the assembly direction of the motor unit 4 and the gear housing 31. Each screw 55 is a self-tapping screw and is screwed into each screw fixing portion 42, 45 of the gear housing 31. Further, a screw 51a for assembling the first and second cases 53 and 54 to each other is also a self-tapping screw.

  A seal is provided between the first case 53 and the second case 54 by a seal member (not shown) such as an elastomer that is outsert-molded in the first case 53. In addition, you may use the sealing member of the extrusion molding mainly having a gasket and butyl rubber for the structure of the seal | sticker between the 1st and 2nd cases 53 and 54. FIG.

  The first and second cases 53 and 54 extend to the upper side of the motor side connector portion 22 of the brush holder 17, and the second case 54 extends in the axial direction (vertical direction) and extends to the motor side connector portion. A cylindrical first connector portion 56 (control circuit side connector portion) that comes into contact with 22 is formed. As shown in FIG. 3, the hollow portion of the first connector portion 56 is a case-side communication hole 56 a that penetrates the second case 54 in the axial direction, and the first connector portion 56 and the inside of the second case 54 are Communicate. The first connector portion 56 and the connector mounting portion 41 of the gear housing 31 sandwich the seal member 23 that substantially covers the motor-side connector portion 22 in the axial direction. Thereby, the lower end opening of the first connector portion 56 and the recess 41a of the connector mounting portion 41 are sealed by the seal member 23, and the liquid tightness of the control circuit case 51 and the gear housing 31 is maintained.

  As shown in FIG. 2, the control circuit board 52 accommodated in the control circuit case 51 is locked and fixed by a locking claw (not shown) formed inside the first case 53. The control circuit board 52 is provided so that its plate surface is orthogonal to the axial direction of the rotary shaft 13, and thus the axial length of the control circuit case 51 can be suppressed. The control circuit board 52 is provided with a plurality of first connection terminals 52 a that are respectively connected to the terminals 24 of the motor-side connector portion 22 in the first connector portion 56. Further, the control circuit board 52 is formed with a second connection terminal portion 52 b exposed from the opening 57 a of the second connector portion 57 formed in the first case 53. The second connector portion 57 is connected to a vehicle body side connector (not shown) extending from the vehicle body side, and the second connection terminal portion 52b of the control circuit board 52 is electrically connected to the terminal portion of the vehicle body side connector. It has become. Thereby, the control circuit board 52 and the window ECU 60 provided on the vehicle body side are electrically connected, and power supply and output of sensor signals and the like are performed. Note that the opening 57a of the second connector portion 57 is closed in a liquid-tight state when connected to the vehicle body side connector. The hall element 18a outputs a rotation detection signal to be detected to the control circuit board 52 via the motor side connector portion 22 and the first connector portion 56, and from there to the window ECU 60 via the second connector portion 57. It has come to be.

  In the motor 1 as described above, the motor side connector portion 22 of the motor side connector portion 22 is formed with a brush side communication hole 22b penetrating in the axial direction, as shown in FIGS. 2 and 3, and this communication hole 22b. Thus, the recess 41a of the connector mounting portion 41 and the first connector portion 56 of the control circuit case 51 are communicated with each other. The connector mounting portion 41 is formed with a gear housing side communication hole 41b that penetrates in the axial direction and allows the recess 41a and the wheel housing portion 36 to communicate with each other. The inside of the gear housing 31 and the inside of the control circuit case 51 are connected through the gear housing side communication hole 41b and the brush side communication hole 22b. Thereby, the space in the control circuit case 51 can be ventilated through the breathing hole 38 (waterproof sheet 39) of the gear housing 31, and the inside and outside of the control circuit case 51 and the gear housing 31 can be communicated. The pressure difference is eliminated.

  As described above, in the motor 1 of the present embodiment, the gear housing 31 and the control circuit case 51 are communicated with each other through the communication holes 22b and 41b. Therefore, the gear housing 31 is provided only by providing the breathing hole 38 only in the gear housing 31. And the control circuit case 51 can be ventilated. As a result, the number of breathing holes 38 that require waterproofing can be reduced, and the motor 1 can be easily manufactured.

Next, characteristic effects of the present embodiment will be described.
(1) In the present embodiment, the gear housing 31 is formed with a breathing hole 38 that communicates the inside and the outside of the gear housing 31, and is formed in the motor side connector portion 22 of the brush holder 17 and the second connector portion 57 of the control circuit case 51. Each has a brush side communication hole 22b and a case side communication hole 56a. Thereby, the inner side of the gear housing 31 and the inner side of the control circuit case 51 are communicated with each other through the communication holes 22b and 56a, and the breathing hole 38, the inner side of the gear housing 31 and the inner side of the control circuit case 51 are connected so as to allow ventilation. For this reason, since it is not necessary to provide the breathing hole 38 in both the gear housing 31 and the control circuit case 51, the number of waterproof treatments applied to the breathing hole 38 can be reduced, and the motor 1 can be easily manufactured. It becomes.

  (2) In the present embodiment, the motor body 2 includes the motor unit 4 having the rotation shaft 13 and a reduction gear that is assembled to the motor unit 4 from the axial direction of the rotation shaft 13 and decelerates the rotation of the rotation shaft 13. The control circuit case 51 is configured to be able to be assembled to the gear housing 31 from the axial direction of the rotary shaft 13 with the speed reduction portion 5 having the gear housing 31 for housing the (worm shaft 35 and wheel gear 37). The Thereby, since the control circuit case 51 is assembled | attached with respect to the gear housing 31 from an axial direction similarly to the assembly direction of the motor part 4 and the gear housing 31, an assembly | attachment becomes easy.

  (3) In the present embodiment, the motor-side connector portion 22 is connected to the second connector portion 57 while being sandwiched between the control circuit case 51 and the gear housing 31. It becomes possible to ensure a liquid-tight state reliably.

(4) In this embodiment, since the motor side connector part 22 is provided in the brush holder 17, the electrical wiring in the motor part 4 becomes easy.
(5) In this embodiment, since the breathing hole 38 is provided in the gear housing 31 of the motor main body 2, the heat generated from the motor unit 4 is transferred to the breathing hole while improving the versatility of the motor unit 4 in the motor main body 2. It can be made easy to diverge from 38 to the outside.

  (6) In this embodiment, the motor body 2 is provided with a rotation detection sensor (Hall element 18a and sensor magnet 18b) that detects the rotation of the rotary shaft 13, and the rotation detection signal of the rotation detection sensor is transmitted to the motor side connector. Since it is configured to be able to output to the control circuit board 52 via the part 22 and the second connector part 57, it is easier to change the control circuit board 52 than when the rotation detection sensor is mounted on the control circuit board 52. .

In addition, you may change embodiment of this invention as follows.
In the above embodiment, the motor-side connector portion 22 is provided on the brush holder 17, but the invention is not particularly limited thereto, and the motor-side connector portion may be provided on the gear housing 31 or the like. For example, as shown in FIG. 4, the motor-side connector portion 71 is formed integrally with the gear housing 31 and extends from the gear housing 31 to the side opposite to the wheel gear 37 in the direction perpendicular to the axis (the right side in FIG. 4). Has been. The motor-side connector portion 71 is provided with a plurality of motor-side terminals 72 that are electrically connected to the motor portion 4. A control circuit side connector portion 73 formed in the control circuit case 51 is inserted and connected to the motor side connector portion 71, and the motor side terminal 72 is provided on the control circuit board 52 in the control circuit case 51. The control circuit side terminal 74 is electrically connected. An O-ring 75 as a seal member is interposed between the connector portions 71 and 73, so that the liquid tightness between the connector portions 71 and 73 is maintained. The control circuit side connector portion 73 is formed with a communication hole 73a that allows the inside of the gear housing 31 and the inside of the control circuit case 51 to communicate with each other. Even in such a configuration, substantially the same effect as the above embodiment can be obtained. In the example shown in FIG. 4, the control circuit side connector portion 73 is inserted into the motor side connector portion 71 and the communication circuit 73 is formed in the control circuit side connector portion 73. The portion 71 may be inserted into the control circuit side connector portion 73, and the communication hole may be formed in the motor side connector portion 71.

In the above embodiment, the breathing hole 38 is formed in the gear housing 31, but it may be formed in the control circuit case 51.
In the above embodiment, the Hall element 18a is used as the rotation detection sensor. However, for example, a magnetoresistive element or the like may be used.

  In the above embodiment, the present invention is embodied in a motor for a power window that opens and closes a window glass of an automobile. However, the present invention is not particularly limited thereto, and may be embodied in a motor other than for a power window.

The side view of the motor of this embodiment. The exploded view of a motor. The partial sectional view of a motor. The side view of the motor of another example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Motor, 2 ... Motor main body, 3 ... Control circuit member, 4 ... Motor part, 5 ... Deceleration part, 13 ... Rotating shaft, 16 ... Brush for electric power feeding, 17 ... Brush holder, 18a ... Hall which comprises a rotation detection sensor Element 18b: Sensor magnet constituting rotation detection sensor 22, 71 ... Motor side connector, 22b ... Brush side communication hole, 31 ... Gear housing, 35 ... Worm shaft constituting reduction gear, 37 ... Construction of reduction gear Wheel gear, 38 ... breathing hole, 41b ... gear housing side communication hole, 51 ... control circuit case, 52 ... control circuit board constituting the control circuit, 56 ... first connector portion as a control circuit side connector portion, 56a ... Case side communication hole, 73... Control circuit side connector portion, 73 a.

Claims (4)

A motor body including a motor unit having a rotation shaft, and a reduction unit having a gear housing for receiving a reduction gear assembled to the motor unit to reduce the rotation of the rotation shaft ;
And a control circuit member having a control circuit case for controlling the rotation of the motor body and a control circuit case for housing the control circuit, wherein the motor body and the control circuit case are integrally assembled. And
The motor part of the motor body has a brush holder for holding a power supply brush, and the brush holder is provided with a motor side connector part,
The control circuit case has a control circuit side connector portion that is electrically connected to the motor side connector portion in a liquid-tight state from the outside,
The motor side connector part is connected to the control circuit side connector part in a state of being sandwiched between the control circuit case and the gear housing,
One of the gear housing and the control circuit case is provided with a breathing hole that communicates the inside and the outside.
The motor-side connector part is provided with a brush-side communication hole, the control circuit-side connector part is provided with a case-side communication hole, and the gear housing is provided with a gear housing-side communication hole connected to the inside thereof. The inside of the gear housing and the inside of the control circuit case communicate with each other through the gear housing side communication hole, the brush side communication hole, and the case side communication hole.
A motor configured to connect the breathing hole, the inside of the gear housing , and the inside of the control circuit case so as to allow ventilation. The motor according to claim 1,
The gear housing, the et assembled in the axial direction of the rotating shaft is relative to the motor unit,
The motor according to claim 1, wherein the control circuit case is configured to be assembled to the gear housing from the axial direction of the rotating shaft. The motor according to claim 1 or 2 ,
The breathing holes, motor, characterized in that provided in the gear housing of the motor body. The motor according to any one of claims 1 to 3 ,
The motor body is provided with a rotation detection sensor for detecting the rotation of the rotation shaft, and a rotation detection signal of the rotation detection sensor is output to the control circuit via the motor side connector portion and the control circuit side connector portion. A motor characterized by being configured.

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