JP2020065357A - motor - Google Patents

Abstract

To provide a motor that allows free setting of a shape of a flange member in accordance with a shape of a motor attached part to which the motor is to be attached.SOLUTION: A motor 10 comprises: a motor case 11 which is formed in a bottomed cylinder integrally having a side wall part 25 and a bottom part 26, and includes an opening 27 on the side opposite to the bottom part 26; and a flange member 24 which is attached to an outer face 26b of the bottom part 26 of the motor case 11 and has a plurality of motor attachment holes.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a motor including a motor case and a flange member.

FIG. 8 is a side view showing a conventional motor.
As shown in FIG. 8, the motor 100 includes a motor case 101, a flange member 102 that also serves as a front lid, a connector portion 103, and a rotating shaft 104. The motor case 101 is formed in a bottomed cylindrical shape that integrally has a side wall portion 101a and a bottom portion 101b.

  The motor 100 having the above configuration is attached to a power transmission mechanism (not shown) via the flange member 102. A power receiving mechanism (not shown) is provided in the power transmission mechanism to which the motor is attached. When the flange member 102 is abutted against the motor receiving portion, the motor 100 is attached to the motor receiving portion with a bolt or the like. Fixed. A motor having such a configuration is described in Patent Document 1, for example.

JP, 2005-6070, A

  By the way, when the motor 100 is attached to the motor-attached portion that is a motor attachment partner through the flange member 102, the shape of the flange member 102 needs to be matched with the shape of the motor-attached portion.

  However, in the conventional motor 100, for example, in order to pull out the connector portion 103 from the boundary portion between the motor case 101 and the flange member 102, the flange member 102 is taken into consideration in consideration of the pull-out position and the pull-out structure of the connector portion 103. It is necessary to decide the shape. Therefore, there is a drawback in that the shape of the flange member 102 cannot be freely set according to the shape of the motor mounting portion.

  The present invention has been made to solve the above problems, and an object thereof is to provide a motor in which the shape of a flange member can be freely set in accordance with the shape of a motor mounting portion that is a motor mounting partner. Especially.

  A motor according to the present invention is formed in a bottomed cylindrical shape integrally having a side wall portion and a bottom portion, has a motor case having an opening on the side opposite to the bottom portion, and is attached to an outer surface of the bottom portion of the motor case. And a flange member having a motor mounting hole.

  A motor according to the present invention includes a rotating shaft arranged on a central axis of the motor case, a motor rotor part and a motor stator part arranged inside the motor case, a motor rotor part and a motor part. A connector unit disposed inside the motor case and located closer to the opening than the stator, and an angle sensor disposed on one end side of the rotation shaft and detecting a rotation angle of the rotation shaft. Prepare

  In the motor according to the present invention, the flange member may be made of aluminum.

  According to the present invention, since the configuration in which the flange member is attached to the bottom portion of the motor case is adopted, the shape of the flange member can be freely set in accordance with the shape of the motor-attached portion to which the motor is attached. .

It is sectional drawing of the motor which concerns on this Embodiment. It is the perspective view which looked at the motor shown in Drawing 1 from the back side. It is a front view of a motor case with which the motor shown in FIG. 1 is equipped. It is sectional drawing of the motor case with which the motor shown in FIG. 1 is equipped. It is a perspective view when the flange member with which the motor shown in FIG. 1 is equipped is seen from the front side. It is a perspective view when the flange member with which the motor shown in FIG. 1 is equipped is seen from the back side. It is sectional drawing which shows the example which crimped and fixed the flange member to the motor case. It is a side view which shows the conventional motor.

Embodiment 1.
Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view of the motor according to the first embodiment, and FIG. 2 is a perspective view of the motor shown in FIG. 1 viewed from the back side. 1 and 2, one side in the motor central axis direction is the front side F and the other side is the rear side R.

<Motor configuration>
As shown in FIGS. 1 and 2, the motor 10 holds a motor case 11, a motor rotor 12, a motor stator 13, a rotating shaft 14 formed of a round shaft, a pair of bearings 15 and 16, and a bearing 15. The bearing holder 17, the bus bar unit 18, the motor harness 19, the resolver 20, the sensor holder 21, the cap member 23, and the flange member 24 are provided. In the first embodiment, as an example, the motor 10 is configured by a three-phase brushless motor.

  The motor rotor 12 is coaxially fixed to the rotating shaft 14. The motor rotor 12 rotates integrally with the rotating shaft 14. On the other hand, the motor stator 13 is formed in a ring shape as a whole, and is arranged coaxially with the rotating shaft 14 and the motor rotor 12.

  The rotating shaft 14 is arranged on the central axis of the motor case 11. A pair of bearings 15 and 16 are attached to the rotary shaft 14 on both sides of the motor rotor 12. The pair of bearings 15 and 16 rotatably support the rotary shaft 14 inside the motor 10.

  The bus bar unit 18 corresponds to a connector unit for electrical wiring, and more specifically, a connector unit for supplying electric power for driving a motor to a coil wound around the motor stator 13. Equivalent to. The busbar unit 18 is located inside the motor case 11 and is located closer to the opening 27 than the motor rotor 12 and the motor stator 13.

  The motor harness 19 has a lead wire 47. The lead wire 47 is connected to the end of the bus bar terminal 45. The resolver 20 is an angle sensor that detects the rotation angle of the rotary shaft 14. The resolver 20 includes a resolver rotor 51 and a resolver stator 52.

  The cap member 23 is attached to one end of the motor case 11 via the housing 50. The cap member 23 is arranged on the front side F of the motor 10 so as to cover the opening 27 of the motor case 11 from the outside. The end portion of the rotary shaft 14 on the front side F is arranged inside the motor 10 without projecting to the front side F of the motor 10 beyond the cap member 23. The cap member 23 and the housing 50 are fixed to the motor case 11 using stud bolts 57 and nuts 58. The base end of the stud bolt 57 is fixed to the through hole 29 (see FIG. 3) of the motor case 11 with a press-fit structure. Further, the housing 50 is provided with a hole (not shown) for drawing out the lead wire 47 of the motor harness 19 described above to the outside of the housing 50.

(Motor case)
FIG. 3 is a front view of a motor case included in the motor shown in FIG. 1, and FIG. 4 is a sectional view of the motor case.
As shown in FIGS. 3 and 4, the motor case 11 has a bottomed cylindrical shape integrally including a cylindrical side wall portion 25 and a bottom portion 26 that is bent inward in the radial direction at one end portion of the side wall portion 25. Is formed in. The motor case 11 is a metal integrally molded product obtained by press working, and more specifically, a deep drawing processed product obtained by deep drawing. The motor case 11 has an opening 27 on the side opposite to the bottom 26. The opening 27 is open toward one of the motor central axis directions (rightward in FIG. 4).

  A plurality of first flanges 28 are formed on the edge of the opening 27 of the motor case 11. A through hole 29 is formed in each of the first flange portions 28. On the other hand, a bearing mounting portion 31 is formed on the bottom portion 26 of the motor case 11. The bearing mounting portion 31 is a portion to which the bearing 16 is mounted, and is formed in a substantially U shape. Further, a protrusion 32 is formed on the bottom portion 26 of the motor case 11 so as to partition the bearing mounting portion 31. The projecting portion 32 projects outward in the central axis direction of the motor case 11. The protrusion 32 is formed in a circular shape when viewed from the central axis direction of the motor case 11. Further, the protruding portion 32 is formed concentrically with the bearing mounting portion 31 around the center axis of the motor case 11.

  An escape hole 33 is formed at the center of the protrusion 32. The escape hole 33 is a hole for avoiding positional interference between the motor case 11 and the rotary shaft 14. Further, in the bottom portion 26 of the motor case 11, a plurality of through holes 34 are provided outside the bearing mounting portion 31 and the protruding portion 32. In the first embodiment, as an example, four through holes 34 are provided in bottom portion 26 of motor case 11. The four through holes 34 are holes formed for attaching the flange member 24 to the motor case 11, and are arranged at angular intervals of 90 ° in the circumferential direction of the motor case 11.

(Flange member)
The flange member 24 is arranged on the rear side R of the motor 10 on the side opposite to the cap member 23. The flange member 24 is attached to the bottom portion 26 of the motor case 11. As shown in FIG. 4, the bottom portion 26 of the motor case 11 has an inner surface 26a that faces the front side F and an outer surface 26b that faces the back side R, and the flange member 24 has a bottom portion. It is attached to the outer surface 26 b of 26. The flange member 24 is made of aluminum. The end portion 14 a of the rotating shaft 14 is arranged so as to project outward (back side R) from the flange member 24. The flange member 24 serves as a member for connecting the entire motor 10 to the mechanical element of the other party. Various types of machine elements to which the motor 10 is attached are conceivable. In the first embodiment, a power transmission mechanism such as a gear transmission mechanism is assumed as an example of a partner mechanical element. The configuration (shape, size, etc.) of the flange member 24 changes depending on the machine element to which the motor 10 is attached. Therefore, the configuration of the flange member 24 described below is merely an example.

FIG. 5 is a perspective view of the flange member included in the motor shown in FIG. 1 as viewed from the front side, and FIG. 6 is a perspective view of the flange member as viewed from the back side.
As shown in FIG. 5 and FIG. 6, a plurality of flange portions 66, 67, 68 are provided on the outer peripheral portion of the flange member 24. In the first embodiment, as an example, the flange member 24 is provided with three flange portions 66, 67, 68. Of the three flange portions 66, 67, 68, one flange portion 66 projects outward in the radial direction from the other two flange portions 67, 68.

  The flange portion 66 is provided with a motor mounting hole 69. Further, the collar portion 67 is provided with a motor mounting hole 70, and the collar portion 68 is provided with a motor mounting hole 71. The motor mounting hole 69 is a through hole in which a screw thread is not formed. The motor mounting holes 70 and 71 are both screw holes. When the motor 10 having the flange member 24 is attached to a power transmission mechanism (not shown), although not shown, the motor 10 is fixed to the power transmission mechanism using three bolts. The power transmission mechanism is provided with a motor attachment portion (not shown) to which the motor 10 is attached. Further, a screw hole is provided at a position of the power transmission mechanism to which the motor is attached, at a position corresponding to the motor mounting hole 69 of the collar portion 66. Through holes for passing bolts are provided at positions corresponding to the holes 71.

  Here, assuming that one surface of the flange member 24 facing the bottom portion 26 of the motor case 11 is a first surface 91 and the other surface of the flange member 24 on the opposite side is a second surface 92, the first surface of the flange member 24. A recess 75 is formed in 91. The recess 75 is formed so as to be able to accommodate the protrusion 32 (see FIG. 4) of the motor case 11 when the flange member 24 is attached to the motor case 11. Specifically, the inner diameter of the recess 75 is set to be slightly larger than the outer diameter of the protrusion 32 of the motor case 11. Further, the depth dimension of the recess 75 is set larger than the protrusion dimension of the protrusion 32. An escape hole 76 is formed at the bottom of the recess 75. The escape hole 76 is provided in the central portion of the flange member 24 so as to penetrate the flange member 24. The escape hole 76 is a hole for avoiding positional interference between the flange member 24 and the rotary shaft 14.

  A plurality of screw holes 77, a first circumferential groove 78, and a fitting portion 79 are formed on the first surface 91 of the flange member 24. The plurality of screw holes 77 are holes formed for attaching the flange member 24 to the motor case 11. Each of the screw holes 77 is arranged outside the recess 75 in the radial direction of the flange member 24. In the first embodiment, the four screw holes 77 have an angle of 90 ° in the circumferential direction so as to correspond to the four through holes 34 provided in the flange member 24 of the motor case 11 in a one-to-one relationship. It is provided at intervals.

  The first circumferential groove 78 is formed in an annular shape so as to surround the recess 75 and the plurality of screw holes 77. As shown in FIG. 1, a seal member 80 made of a ring-shaped rubber-like elastic body is attached to the first circumferential groove 78. The seal member 80 is sandwiched between the motor case 11 and the flange member 24 in the motor central axis direction. The seal member 80 suppresses the infiltration of water and the like into the inside of the motor 10 on the rear side R of the motor 10.

  The fitting portion 79 is a portion that is fitted to the end portion on the rear surface side R of the motor case 11 when the flange member 24 is attached to the motor case 11. The fitting portion 79 is formed in an annular shape so as to surround the first circumferential groove 78. Further, the fitting portion 79 is formed concentrically with the escape hole 76 and the first circumferential groove 78 around the central axis of the flange member 24.

  On the other hand, a tubular portion 81 is formed on the second surface 92 of the flange member 24. A second peripheral groove 82 is formed on the outer peripheral surface of the tubular portion 81. As shown in FIG. 1, a seal member 83 made of a ring-shaped rubber-like elastic body is attached to the second circumferential groove 82. The seal member 83 is sandwiched between the flange member 24 and a motor mounting portion (not shown) in the radial direction of the motor 10 so as to suppress the infiltration of moisture or the like on the rear side R of the motor 10. Inside the tubular portion 81, an oil seal member 84 is attached as shown in FIG. The oil seal member 84 prevents oil from entering the inside of the motor 10 on the rear surface side R of the motor 10. The outer peripheral portion of the oil seal member 84 is in pressure contact with the inner peripheral surface of the tubular portion 81. The inner peripheral portion of the oil seal member 84 is in pressure contact with the outer peripheral surface of the rotary shaft 14 over the entire circumference of the rotary shaft 14.

  When the flange member 24 having the above-described configuration is attached to the motor case 11, first, the first surface 91 of the flange member 24 is pressed against the outer surface 26b of the bottom portion 26 of the motor case 11 so that the protruding portion of the motor case 11 is pressed. 32 is housed in the recess 75 of the flange member 24. At this time, the four through holes 34 (see FIG. 3) provided in the motor case 11 and the four screw holes 77 (see FIG. 5) provided in the flange member 24 are aligned. Next, as shown in FIG. 1, a screw 85 is inserted into the through hole 34 of the motor case 11, and the screw 85 is screwed into the screw hole 77 of the flange member 24 and tightened. The same number of screws 85 as the through holes 34 and the screw holes 77, that is, four screws 85 are used, and these four screws 85 are appropriately tightened. Thereby, the flange member 24 can be fixed to the motor case 11.

  When the motor 10 is attached to the motor-attached portion of the power transmission mechanism (not shown), a bolt is passed through the motor-attaching hole 69 of the collar portion 68, and the bolt is screwed into the screw hole of the motor-attached portion and tightened. Further, a bolt is passed through a through hole provided in the motor mounting portion corresponding to the flange portion 68, and the bolt is screwed into the motor mounting hole 70 and tightened. Further, a bolt is passed through a through hole provided in the motor mounting portion corresponding to the motor mounting hole 69, and the bolt is screwed into the motor mounting hole 71 and tightened. As a result, the motor 10 can be fixed to the motor mounting portion of the power transmission mechanism.

<Effect of Embodiment 1>
The first embodiment adopts a configuration in which the flange member 24 is attached to the outer surface 26b of the bottom portion 26 of the motor case 11. Accordingly, when the motor harness 19 and the like are pulled out from the opening 27 side of the motor case 11, it is not necessary to determine the shape of the flange member 24 in consideration of the pulling position, the pulling structure, and the like. Therefore, the shape of the flange member 24 can be freely set according to the shape of the motor-attached portion (not shown). Further, even if the shape of the motor mounted portion is changed, the shape of the flange member 24 can be freely changed according to the changed shape of the motor mounted portion. As a result, it becomes possible to provide the motor 10 capable of flexibly coping with various shapes of the motor attachment portion.

  Further, in the first embodiment, since the flange member 24 is screwed and fixed to the bottom portion 26 of the motor case 11, the flange member 24 attached to the motor case 11 can be replaced as needed. Further, the flange member 24 attached to the motor case 11 can be freely selected according to the mechanical element of the other party.

Further, in the conventional motor 100 (see FIG. 8), a bus bar unit (not shown) is arranged inside the motor case 101, or an angle sensor (not shown) is arranged on the rotary shaft 104 in the motor 100. If so, the mounting position of the flange member 102 will be separated from the motor rotor portion and the motor stator portion. Therefore, when the motor 100 is attached to the motor attached portion (not shown) through the flange member 102, the load applied to the motor attached portion increases due to the weight of the motor rotor portion and the motor stator portion. Therefore, the operation of the motor 100 may become unstable.
On the other hand, in the first embodiment, although the bus bar unit 18 is arranged inside the motor case 11 and the resolver 20 is arranged at one end side of the rotating shaft 14, the motor rotor 12 is arranged. The flange member 24 can be arranged near the motor stator 13. For this reason, when the motor 10 is attached to the motor attached portion (not shown) via the flange member 24, the load applied to the motor attached portion due to the weight of the motor rotor 12 and the motor stator 13 is reduced. Therefore, the motor 10 can be stably operated.

  Further, in the first embodiment, the flange member 24 is made of aluminum. Accordingly, die casting such as die casting or forging can be applied to the method of manufacturing the flange member 24. Further, the flange member 24 is excellent in heat dissipation, and is also advantageous in achieving light weight and cost reduction.

<Modifications, etc.>
The technical scope of the present invention is not limited to the above-described embodiments, and includes various modifications and improvements as long as a specific effect obtained by the constituent features of the invention or a combination thereof can be derived.

  For example, in the above-described first embodiment, the configuration in which the flange member 24 is screwed and fixed to the bottom portion 26 of the motor case 11 has been described as an example, but the present invention is not limited to this, and as illustrated in FIG. 7, for example. It is also possible to adopt a configuration in which the flange member 24 is formed with a caulking portion 95 by caulking, and the flange member 24 is caulked and fixed to the bottom portion 26 of the motor case 11 by the caulking portion 95. In the configuration in which the flange member 24 is caulked and fixed, screws and the like are not required, so that the number of parts can be reduced.

DESCRIPTION OF SYMBOLS 10 motor 11 motor case 24 flange member 25 side wall part 26 bottom part 26b outer surface 27 opening part

Claims (4)

A motor case that is formed in a bottomed cylindrical shape that integrally has a side wall portion and a bottom portion and that has an opening on the side opposite to the bottom portion;
A flange member that is attached to the outer surface of the bottom of the motor case and that has a plurality of motor attachment holes,
A motor. The motor according to claim 1, wherein the flange member is made of aluminum. The motor according to claim 1 or 2, wherein the flange member is fixed to the bottom of the motor case with a screw. The motor according to claim 2, wherein the flange member is caulked and fixed to a bottom portion of the motor case.

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