JP4287254B2 - motor - Google Patents

Description

  The present invention relates to a motor with a speed reducer in which a motor unit and a speed reduction unit are integrally assembled.

  2. Description of the Related Art Conventionally, there is a motor with a reduction gear such as a power window motor for a vehicle in which a connector part formed separately from the motor assembly is assembled to a motor assembly in which the motor part and the reduction part are assembled together. .

For example, Patent Document 1 discloses a power window motor having a configuration in which a connector unit, in which a connector to which an external power source is connected and a control unit that controls rotation of a motor unit are integrally mounted, is mounted on a motor assembly later. It is disclosed. And if it is such a structure, it will be necessary to give a complicated and expensive waterproof process to the opening part of the housing like a motor with a reduction gear which incorporates a control part in a housing of either a motor part or a reduction part Therefore, the cost can be reduced. Further, since the assembly structure is simple, the assembly process is facilitated and assembly errors can be suppressed.
US Pat. No. 5,245,258

  However, since the conventional motor with a reduction gear described in Patent Document 1 has a structure in which the connector portion is fixed to the housing by a screw or the like after the connector portion is inserted into the motor assembly, a fixing member such as a screw or the like. If the fixing process is included, there is a problem that the number of parts and the assembling process increase.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a motor capable of reducing the number of parts and the number of assembly steps.

In order to solve the above problems, the invention according to claim 1 is a motor unit as a drive source, a speed reducing unit that decelerates rotation of the motor unit, and the motor unit and the speed reducing unit are separately provided. And a connector part for supplying driving power to the motor part. The motor part and the speed reduction part are integrated by fixing a yoke housing of the motor part and a gear housing of the speed reduction part. The yoke housing and the gear housing are fixed to a surface opposite to the gear housing of a flange portion extending radially outward from the opening of the yoke housing. fixing plate fixed together with the yoke housing and the gear housing by a fixing member for is provided, the opposite of the fixed plate and the flange portion Connecting portion of the connector portion is summarized as Rukoto is sandwiched between the surfaces.

Invention according to claim 2, wherein the connector portion, the erected on the connecting portion comprises a connector-side connecting portion for electrically connecting the motor unit and the connector portion, the yoke housing and the gear The gist is that the housings are assembled with each other along the axial direction, and the motor-side connecting portion to which the connector-side connecting portion is connected is disposed in the same direction as the axial direction.

According to a third aspect of the invention, the front notated flange portion, and summarized in that the insertion hole in which the connector-side connecting portion is inserted at a position corresponding to the motor-side connection section is formed.

The invention according to claim 4 is characterized in that the insertion hole is formed so as to be disposed between the two fixing members.
According to a fifth aspect of the present invention, the motor-side connecting portion is formed in a brush holder that is fitted into the opening of the yoke housing, and the brush holder rotates integrally with a rotating shaft of the motor portion. And a Hall element at a position opposite to.

The gist of the invention described in claim 6 is that the fixing member is a fastening member that is stretched over the yoke housing and the gear housing via the fixing plate.
The gist of the invention described in claim 7 is that the connector part integrally includes a control part for controlling the rotation of the motor part.

(Function)
According to the first aspect of the invention, the connector portion is assembled together with the motor portion and the speed reduction portion, so that the number of assembling steps is reduced. Further, since a dedicated fixing member for fixing the connector portion is not required, the number of parts is reduced. Further, since the connecting portion of the connector portion is sandwiched between the fixed plate and the surface of the flange portion opposite to the gear housing, the fitting portion for mounting the motor portion on the yoke housing or the gear housing There is little change from the conventional motor with a transmission about each component which comprises a motor part and a deceleration part, such as the necessity to form etc .. Therefore, many parts can be shared, and as a result, the cost can be reduced.

  According to the invention described in claim 2, since the assembly direction of the yoke housing and the gear housing and the electrical connection direction of the connector portion and the motor portion are the same direction, the connector portion is connected to the yoke housing and the gear housing. The connector part and the motor part can be electrically connected only by assembling from the same direction as the assembling direction. As a result, the connector part can be easily and reliably assembled.

  According to the invention described in claim 3, the connector portion is assembled to the flange portion of the yoke housing along the assembling direction of the yoke housing and the gear housing, and the connector side connecting portion is inserted into the insertion hole formed in the flange portion. It is possible to electrically connect the connector portion and the motor portion simply by doing so. As a result, the connector part can be easily and reliably assembled.

  According to the fourth aspect of the present invention, the fixing plate is fixed to the flange portion so as to sandwich the connecting portion between the two fixing members. Therefore, the connector part can be fixed more reliably.

According to the fifth aspect of the present invention, since the wiring connected to the Hall element is concentrated in the brush holder, the assembly work is facilitated and wiring connection mistakes are prevented.
According to the sixth aspect of the present invention, since the connecting portion of the connector portion is more securely clamped by fastening the fixing plate and the fixing portion with the fastening member, the connector portion can be more reliably fixed. become.

  According to the seventh aspect of the present invention, the size of the gear housing is reduced as compared with a motor with a reduction gear of a built-in control unit that houses the control unit in the gear housing. Furthermore, there is no significant difference in the shape of the gear housing even when compared with a normal motor whose control unit is arranged outside the motor. Therefore, in the actual assembly process, the same conveying line as the normal motor is shared. It is possible to mix with other parts. As a result, since it is not necessary to newly install a new line, it is possible to further reduce the manufacturing cost.

  ADVANTAGE OF THE INVENTION According to this invention, the motor which can reduce a number of parts and an assembly man-hour can be provided.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment in which the invention is embodied in a motor with a reduction gear will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the motor 1 of the present embodiment supplies a motor unit 2 as a drive source, a speed reduction unit 3 that decelerates the rotation of the motor unit 2, and driving power to the motor unit 2. And a connector part 4 for the purpose.

As shown in FIG. 1, the motor unit 2 includes an armature 7, a yoke housing 8 that houses the armature 7, and a brush holder 10 that holds a power supply brush 9.
As shown in FIG.1 and FIG.4, the yoke housing 8 of this embodiment is formed in the substantially bottomed flat cylindrical shape. A plurality of magnets 11 are fixed to the inner peripheral surface of the yoke housing 8, and a bearing 13 is formed at the center of the bottom. The armature 7 is rotatably accommodated in the yoke housing 8 so as to be surrounded by the magnets 11 when the base end portion of the rotating shaft 12 is pivotally supported by the bearing 13.

  As shown in FIGS. 1, 3, and 5, the brush holder 10 is formed in a shape that substantially covers the opening 8 a (see FIG. 4) of the yoke housing 8, and is fitted into the opening 8 a. In addition, a seal portion 10d is formed on the outer peripheral portion of the brush holder 10 over the entire periphery, and the seal member 10e covered with the seal portion 10d serves as the opening 8a of the yoke housing 8 and the gear housing 23. Both openings are sealed by being in close contact with the opening 23a.

  As shown in FIG. 1, a bearing 14 is provided at the center of the brush holder 10, and the brush holder 10 rotatably supports the vicinity of the tip of the rotary shaft 12 by the bearing 14. The brush holder 10 holds the power supply brush 9 so that the power supply brush 9 is in sliding contact with the commutator 15 of the armature 7.

  As shown in FIGS. 3 and 5, a motor side coupling portion 16 that is a connection portion with the connector portion 4 is formed on the outer periphery of the brush holder 10. In the present embodiment, the motor side connecting portion 16 is formed in a substantially flat plate shape, and extends from the outer periphery of the brush holder 10 toward the radially outer side.

  A motor side connecting portion 18 connected to the connector side connecting portion 43 is provided at the tip of the motor side connecting portion 16, and the motor side connecting portion 18 is arranged in a direction orthogonal to the motor side connecting portion 16 and on the speed reducing portion 3 side. It protrudes toward (left direction in FIG. 3). A female terminal 18 a to which the male terminal of the connector side connection portion 43 is connected is embedded in the motor side connection portion 18 (see FIG. 2). The female terminal 18 a is connected to each power supply brush 9 via the wiring 17. It is connected. In the motor unit 2, the rotating shaft 12 rotates when the driving power supplied from the connector unit 4 is supplied to the armature 7 through the power supply brush 9.

As shown in FIG. 1, the speed reduction unit 3 includes a worm shaft 21 and a wheel 22, and a gear housing 23 that accommodates the worm shaft 21 and the wheel 22.
The gear housing 23 includes a worm shaft housing portion 25 and a wheel housing portion 26. The worm shaft 21 is rotatably supported in the worm shaft accommodating portion 25 by being pivotally supported by the bearing 27, and the wheel 22 is rotatably accommodated in the wheel accommodating portion 26.

  One end of the worm shaft 21 is connected to the rotating shaft 12 of the motor unit 2 via a clutch 28. The clutch 28 includes a driving side rotating body 31 fixed to the rotating shaft 12 and rotating integrally with the rotating shaft 12, and a driven side rotating body 32 fixed to the worm shaft 21 and rotating integrally with the worm shaft 21. The clutch 28 is configured to transmit the rotational force from the drive-side rotator 31 to the driven-side rotator 32 while not transmitting the rotational force from the driven-side rotator 32 to the drive-side rotator 31. The worm portion 21 a of the worm shaft 21 is connected to the wheel 22.

  That is, the worm shaft 21 is rotated by being driven by the motor unit 2 and transmits the rotational force of the motor unit 2 to the wheel 22. The wheel 22 decelerates the rotation of the worm shaft 21 and transmits it to the output shaft 33 fixed to the center of the wheel 22 (see FIG. 2).

  In the present embodiment, a sensor magnet 34 is provided at a predetermined position of the drive-side rotating body 31 fixed to the rotating shaft 12, and the motor portion is provided on the surface 10 a on the gear housing 23 side of the brush holder 10. Hall IC 35 is provided at a position arranged in the vicinity of sensor magnet 34 in the assembled state of 2 and reduction part 3 (see FIG. 3). And the control part 37 of the connector part 4 detects the rotation state of the motor part 2 based on the pulse signal which this Hall IC 35 outputs.

  As shown in FIGS. 1 to 3 and 6, the connector unit 4 includes a connector 36 to which an external power source (not shown) is connected, and a control unit 37 that controls the rotation of the motor unit 2, and the control unit 37 is a connector. 36 is formed integrally. In this embodiment, the control unit 37 includes a capacitor 38, a choke coil 39, and a control board 40. The connector 36 includes a connector boot 41 formed in a substantially cylindrical shape, and the control unit 37 is fixed to the side opposite to the connection side 41 a of the connector boot 41.

  As shown in FIG. 6, at one end of the control unit 37, a connector side coupling unit 42 that is a connection unit with the brush holder 10 is provided. In the present embodiment, the connector side connecting portion 42 is formed in a flat plate shape, and extends from one end of the control portion 37 in a direction orthogonal to the axial direction of the connector boot 41.

  As shown in FIG. 3, a connector side connection portion 43 connected to the motor side connection portion 18 is erected at the tip of the connector side connection portion 42. The connector side connecting portion 43 has a male terminal 43a extending in a direction orthogonal to the connector side connecting portion 42, and the male terminal 43a is connected to the connector 36 by wiring (not shown). The connector part 4 is electrically connected to the motor part 2 by inserting the male terminal 43a into the female terminal 18a. And the control part 37 controls rotation of the motor part 2 by controlling the drive electric power supplied to the motor part 2, and the drive object apparatus (power window regulator etc.) connected with the output shaft 33 of the deceleration part 3 Control the operation of

Next, an assembly structure of the motor unit 2, the speed reduction unit 3, and the connector unit 4 constituting the motor 1 of the present embodiment will be described.
[Assembly structure]
As shown in FIGS. 1 to 3, the yoke housing 8 of the motor unit 2 and the gear housing 23 of the speed reduction unit 3 are arranged in the axial direction (the rotary shaft 12 and the worm shaft so that the openings 8a and 23a are aligned with each other. 21) and is fastened by a bolt 45 and a nut 46 as a fixing member and a fastening member.

  More specifically, as shown in FIG. 4, a pair of flange portions 51, 52 extending radially outward from the opening 8 a are formed in the opening 8 a of the yoke housing 8 of the motor unit 2. The flange portions 51 and 52 are formed with a plurality of insertion holes 53 through which the bolts 45 are inserted. In the present embodiment, the flange portion 51 constitutes a fixed portion, and two insertion holes 53 a and 53 b are formed in the flange portion 51. An insertion hole 54 is formed between the insertion holes 53 a and 53 b of the flange portion 51.

  On the other hand, as shown in FIG. 3, a plurality of fastening portions 56 in which nuts 46 are disposed are formed in the vicinity of the end portion of the reduction gear portion 3 on the opening 23 a side of the gear housing 23. Each fastening portion 56 has an opening 23 a (opening end) of each fastening portion 56 and the gear housing 23 at a position facing each insertion hole 53 formed in each flange portion 51, 52 in the assembled state with the yoke housing 8. A through-hole (not shown) that communicates with each other is formed. The yoke housing 8 and the gear housing 23 are fixed by inserting the bolts 45 from the opposite sides of the gear housing 23 into the insertion holes 53 and screwing the bolts 45 to the corresponding nuts 46. .

  As shown in FIG. 1 to FIG. 3 and FIG. 7, in this embodiment, a fixing plate 60 is disposed on the surface 51 a of the flange portion 51 on the side opposite to the gear housing 23. The two bolts 45 a and 45 b are suspended over the flange portion 51 and the gear housing 23 (the fastening portion 56 thereof) via the fixing plate 60. The connector portion 4 is fastened with bolts 45 a and 45 b and nuts 46 a and 46 b, whereby the connector side connecting portion 42 is sandwiched between the fixing plate 60 and the flange portion 51 and fixed to the flange portion 51.

  More specifically, as shown in FIGS. 3 and 7, in the present embodiment, the brush holder 10 is fitted to the yoke housing 8 so that the motor side connecting portion 16 is disposed on the flange portion 51 side. The insertion hole 54 of the flange portion 51 is formed corresponding to the motor side connection portion 18 of the motor side coupling portion 16 so that the motor side connection portion 18 is disposed on the gear housing 23 side of the insertion hole 54. Is set.

  The connector portion 4 is assembled to the motor portion 2 by inserting a connector side connection portion 43 provided on the connector side connecting portion 42 into the insertion hole 54 along the axial direction of the yoke housing 8. The male terminal 43 a is electrically connected to the motor unit 2 by being inserted into the female terminal 18 a of the motor side connection unit 18.

  On the other hand, as shown in FIG. 7, the fixing plate 60 includes a clamping part 60 a that clamps the connector side coupling part 42, a standing part 60 b that is erected on both ends of the clamping part 60 a, and each of the standing parts 60 b. A fastening portion 60c is provided extending from the end portion toward the outside of the sandwiching portion 60a so as to be parallel to the sandwiching portion 60a. Each fastening portion 60c is formed with insertion holes 62a and 62b through which the bolts 45a and 45b are inserted.

  The fixing plate 60 is opposite to the gear housing 23 of the flange portion 51 so that the connector side connecting portion 42 of the connector portion 4 is disposed inside the U-shaped portion formed by the holding portion 60a and the compatible portion 60b. Arranged on the surface 51a. In the present embodiment, in the standing portion 60b, the distance between the clamping portion 60a and the surface 51a is substantially equal to the thickness of the connector side connecting portion 42 in a state where the fixing plate 60 is disposed on the surface 51a. It is formed as follows. Further, the length in the longitudinal direction of the sandwiching portion 60a is set to be substantially equal to the width of the connector side connecting portion 42.

  Then, bolts 45a and 45b are inserted into both insertion holes 62a and 62b of the fixing plate 60 and both insertion holes 53a and 53b of the flange portion 51 (and the insertion holes of the gear housing 23) and screwed into the corresponding nuts 46a and 46b. By tightening the connector portion 4, the connector side connecting portion 42 is sandwiched between the fixing plate 60 and the flange portion 51. Thereby, the connector part 4 is fixed to the flange part 51.

As described above, according to the present embodiment, the following features can be obtained.
(1) The motor 1 includes a motor unit 2, a reduction unit 3 that decelerates the rotation of the motor unit 2, and a connector unit 4 for supplying driving power to the motor unit 2. The yoke housing 8 of the motor unit 2 and the gear housing 23 of the speed reduction unit 3 are fastened by bolts 45 and nuts 46 as fastening members. In the opening 8a of the yoke housing 8, a pair of flange portions 51 and 52 extending from the opening 8a toward the radially outer side are formed. The connector part 4 is assembled so that the connector side connecting part 42 is sandwiched between the flange part 51 and the fixing plate 60 disposed on the flange part 51. The connector portion 4 is fastened with bolts 45 and nuts 46 spanned over the flange portion 51 and the gear housing 23 via the fixing plate 60, so that the connector side connecting portion 42 is fixed to the flange portion 51. It is sandwiched between the plate 60 and fixed to the flange portion 51.

  If it is such a structure, since the connector part 4 is assembled | attached with the motor part 2 and the deceleration part 3, an assembly man-hour can be reduced. Moreover, since the fixing member for fixing the connector part 4 becomes unnecessary, the number of parts can be reduced. Further, since the connector side connecting portion 42 of the connector portion 4 is sandwiched between the fixing plate 60 and the flange portion 51, a fitting portion for mounting the motor portion 2 on the yoke housing 8 and the gear housing 23, etc. There are few changes from the conventional motor with a transmission about each component which comprises the motor part 2 and the deceleration part 3, such as the need to form. Therefore, many parts can be shared, and as a result, cost reduction can be achieved.

  (2) A motor-side connecting portion 16 extending radially outward from the outer periphery is formed on the outer periphery of the brush holder 10, and the motor-side connecting portion 16 has a tip orthogonal to the motor-side connecting portion 16. The motor side connection part 18 is provided so as to project in the direction and the speed reduction part 3 side. The brush holder 10 is fitted into the yoke housing 8 so that the motor side connecting portion 16 is disposed on the flange portion 51 side, and an insertion hole 54 is formed in the flange portion 51 at a position corresponding to the motor side connecting portion 18. . And the connector part 4 is assembled | attached to the motor part 2 by inserting the connector side connection part 43 standingly arranged in the direction orthogonal to this connector side connection part 42 in the front-end | tip of the connector side connection part 42 in the insertion hole 54 .

  With such a configuration, the assembly direction of the connector portion 4 is the same as the assembly direction of the yoke housing 8 and the gear housing 23, so that the connector portion 4 can be easily assembled.

  Further, the motor side connecting portion 18 and the connector side connecting portion 43 are arranged in the axial direction of the yoke housing 8 and the gear housing 23, that is, in the same direction as the assembly direction of the yoke housing 8 and the gear housing 23, respectively. Accordingly, by inserting the connector side connection portion 43 into the insertion hole 54 along the axial direction of the yoke housing 8, the connector portion 4 is assembled to the yoke housing 8, and the male terminal 43a of the connector side connection portion 43 is connected to the motor side. The connector part 4 and the motor part 2 can be electrically connected only by inserting into the female terminal 18a of the part 18. As a result, the connector part 4 can be assembled easily and reliably.

  (3) Two insertion holes 53a and 53b through which the bolts 45a and 45b are inserted are formed in the flange portion 51, and the insertion hole 54 is formed between the two insertion holes 53a and 53b. With such a configuration, the connector side connecting portion 42 can be securely clamped and clamped between the fixing plate 60 and the flange portion 51, so that the connector portion 4 can be fixed more reliably.

(4) The connector unit 4 includes a connector 36 connected to an external power source and a control unit 37 that controls the rotation of the motor unit 2, and the connector 36 and the control unit 37 are integrally formed.
With such a configuration, the gear housing 23 can be reduced in size as compared with a motor with a reduction gear of a built-in control unit that houses the control unit 37 in the gear housing. In particular, the shape of the gear housing 23 is not significantly different from the gear housing of a normal motor in which the control unit is arranged outside the motor. Therefore, in the actual assembly process, the same conveyance line as that of the normal motor is shared. However, it is possible to mix with normal motor parts. That is, it is not necessary to newly install a new line in order to manufacture the motor 1 of the present embodiment. Therefore, the manufacturing cost can be further suppressed.

  (5) On the surface 10a of the brush holder 10 on the side of the gear housing 23, a Hall IC 35 as a Hall element is provided at a position arranged in the vicinity of the sensor magnet 34 when the motor unit 2 and the speed reduction unit 3 are assembled. . With such a configuration, since the wiring connected to the Hall IC 35 can be concentrated in the brush holder 10, it is easy to assemble and prevent wiring mistakes.

In addition, you may change each said embodiment as follows.
In the present embodiment, the connector unit 4 is formed such that the connector 36 and the control unit 37 are integrally formed, but the control unit 37 may be embodied as a normal motor disposed outside the motor 1.

  In the present embodiment, the fixed plate 60 is disposed on the flange portion 51 of the yoke housing 8, and the connector side connecting portion 42 is sandwiched between the fixed plate 60 and the flange portion 51. However, the present invention is not limited to this, and a fixing portion in which the fixing plate is disposed is formed in the vicinity of the end portion on the opening 23a side on the gear housing 23 side, and the connector side connecting portion 42 is sandwiched between the fixing portion and the fixing plate. It is good also as composition to do.

-In this embodiment, although the insertion hole 54 in which the connector side connection part 43 is inserted was formed in the flange part 51, it is good also as providing a notch.
-You may use the motor 1 of the said embodiment for the apparatus mounted in vehicles other than the power window apparatus for vehicles, and apparatuses other than a vehicle.

The fragmentary sectional view of the motor of this embodiment. Similarly, the fragmentary sectional view of the motor of this embodiment. The exploded view of the motor of this embodiment. The top view of the yoke housing of this embodiment. The top view of the brush holder of this embodiment. The top view of the connector part of this embodiment. The assembly drawing of the motor of this embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Motor, 2 ... Motor part, 3 ... Deceleration part, 4 ... Connector part, 8 ... Yoke housing, 8a ... Opening part, 10 ... Brush holder, 12 ... Rotary shaft, 18 ... Motor side connection part, 23 ... Gear housing 34 ... Sensor magnet, 35 ... Hall IC, 37 ... Control part, 42 ... Connector side connection part, 43 ... Connector side connection part, 45, 45a, 45b ... Bolt, 46, 46a, 46b ... Nut, 51, 52 ... Flange portion, 54 ... insertion hole, 60 ... fixing plate.

Claims (7)

A motor unit as a drive source; a deceleration unit that decelerates rotation of the motor unit; and a connector unit that is provided separately from the motor unit and the deceleration unit and that supplies driving power to the motor unit. The motor part and the speed reduction part are a motor assembled integrally by fixing a yoke housing of the motor part and a gear housing of the speed reduction part,
A flange member extending radially outward from the opening of the yoke housing is provided on a surface opposite to the gear housing with a fixing member for fixing the yoke housing and the gear housing. fixing plate fixed with the gear housing is arranged, the connecting portion of the connector portion is sandwiched between the opposite surface of the fixing plate and the flange portion Rukoto,
A motor characterized by The motor according to claim 1,
The connector unit includes a connector-side connecting portion for electrically connecting the the erected on the connecting portion and the connector portion motor unit,
The yoke housing and the gear housing are assembled to each other along the axial direction, and the motor side connecting portion to which the connector side connecting portion is connected is disposed in the same direction as the axial direction. motor. The motor according to claim 2,
The front notated flange portion, a motor, characterized in that, the insertion hole into which the connector-side connecting portion at a position corresponding to the motor-side connection section is inserted is formed. The motor according to claim 3, wherein
The insertion hole is formed to be disposed between the two fixing members;
A motor characterized by In the motor according to any one of claims 2 to 4,
The motor-side connection portion is formed in a brush holder that is fitted into the opening of the yoke housing, and the brush holder includes a hall element at a position facing a sensor magnet that rotates integrally with the rotation shaft of the motor portion. A motor characterized by that. In the motor according to any one of claims 1 to 5,
The motor according to claim 1, wherein the fixing member is a fastening member that spans the yoke housing and the gear housing via the fixing plate. In the motor according to any one of claims 1 to 6,
The connector unit is integrally provided with a control unit that controls the rotation of the motor unit;
A motor characterized by

Images