WO2020067254A1 - Moteur - Google Patents

Moteur Download PDF

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Publication number
WO2020067254A1
WO2020067254A1 PCT/JP2019/037789 JP2019037789W WO2020067254A1 WO 2020067254 A1 WO2020067254 A1 WO 2020067254A1 JP 2019037789 W JP2019037789 W JP 2019037789W WO 2020067254 A1 WO2020067254 A1 WO 2020067254A1
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WO
WIPO (PCT)
Prior art keywords
peripheral region
inner peripheral
outer peripheral
stator
housing
Prior art date
Application number
PCT/JP2019/037789
Other languages
English (en)
Japanese (ja)
Inventor
雄平 山口
中村　圭吾
久嗣 藤原
留介 佐藤
Original Assignee
日本電産株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電産株式会社 filed Critical 日本電産株式会社
Publication of WO2020067254A1 publication Critical patent/WO2020067254A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers

Definitions

  • the present invention relates to a motor.
  • This application is based on Japanese Patent Application No. 2018-185205 filed on Sep. 28, 2018. This application claims the benefit of priority to the application. The entire contents are hereby incorporated by reference into the present application.
  • Patent Document 1 discloses a brushless motor including a terminal, a bracket for holding the terminal, and a housing for housing the stator.
  • an O-ring is sandwiched between an outer peripheral surface of a bracket and an inner peripheral surface of a housing. The outer peripheral surface of the bracket fits on the inner peripheral surface of the housing in the region above the O-ring.
  • One object of one embodiment of the present invention is to provide a motor that can increase the reliability of sealing by a sealing member in view of the above problems.
  • One aspect of the motor according to the present invention includes a rotor that rotates around a central axis extending along a vertical direction, a stator positioned radially outside the rotor, a bracket positioned above the stator, and And a housing for housing.
  • the housing has a housing cylinder that surrounds the stator from the radial outside.
  • An inner peripheral surface of the housing cylinder portion has a first inner peripheral region having a first inner diameter and a second inner peripheral member located below the first inner peripheral region and having a second inner diameter smaller than the first inner diameter.
  • the bracket has an insertion tube portion extending downward and inserted between the stator and the inner peripheral surface of the housing tube portion in the radial direction.
  • An outer peripheral surface of the insertion tube portion has a first outer peripheral region facing the first inner peripheral region in the radial direction, and a second outer peripheral region located below the first outer peripheral region and facing the second inner peripheral region in the radial direction. And two outer peripheral regions.
  • a first sealing member extending along the circumferential direction is disposed between the first inner peripheral area and the first outer peripheral area. The second inner peripheral area and the second outer peripheral area are fitted to each other.
  • FIG. 1 is a sectional view of a motor according to one embodiment.
  • FIG. 2 is a partially enlarged view of an opening side of the housing cylinder in FIG. 1.
  • FIG. 3 is a perspective view of a bus bar assembly and a circuit board according to one embodiment.
  • FIG. 4 is a plan view of a bus bar assembly and a circuit board according to one embodiment.
  • FIG. 5 is a cross-sectional view of a terminal connection portion according to one embodiment.
  • FIG. 6 is a schematic cross-sectional view of the first positioning pin of one embodiment.
  • Each drawing shows the Z axis.
  • the center axis J appropriately shown in each drawing is a virtual line extending in parallel with the Z-axis direction.
  • the axial direction of the central axis J that is, the direction parallel to the Z-axis direction is simply referred to as “axial direction”
  • the radial direction around the central axis J is simply referred to as “radial direction”
  • the circumferential direction around J is simply referred to as the “circumferential direction”.
  • the positive side in the Z-axis direction in the axial direction may be referred to as “upper”, and the negative side in the Z-axis direction in the axial direction may be referred to as “lower side”.
  • the vertical direction, the upper side, and the lower side are simply directions used for description, and do not limit the actual positional relationship or the attitude of the motor when the motor is used.
  • FIG. 1 is a cross-sectional view of a motor 1 according to the present embodiment.
  • the motor 1 of the present embodiment is a brushless motor.
  • the motor 1 includes a housing 10, a cover member 20, a rotor 30 having a shaft 31, a stator 40, bearings 51 and 52, a circuit board 70, a bus bar assembly 60, a first , And a second sealing member 82.
  • the first sealing member 81 and the second sealing member 82 are O-rings.
  • the first sealing member 81 is referred to as a lower O-ring 81
  • the second sealing member 82 is referred to as an upper O-ring 82.
  • the bearing includes a lower bearing 51 and an upper bearing 52.
  • Housing 10 houses stator 40.
  • the housing 10 holds the stator 40 and the lower bearing 51.
  • the material of the housing 10 is, for example, metal.
  • the housing 10 has a cylindrical shape that opens upward.
  • the housing 10 has a housing cylinder 11, a bottom 15, and a flange 16.
  • the storage cylinder 11 is a multi-stage cylindrical shape whose inner and outer diameters change along the axial direction around the center axis J.
  • the thickness of the housing cylinder 11 is substantially uniform along the axial direction.
  • the housing cylinder 11 surrounds the stator 40 from the outside in the radial direction.
  • FIG. 2 is a partially enlarged view of an opening side of the housing cylinder 11 in FIG.
  • the storage cylinder 11 has an inner peripheral surface 12 facing radially inward.
  • the inner peripheral surface 12 is divided into a plurality of regions arranged in the axial direction and having different inner diameters.
  • the inner peripheral surface 12 has an upper end inner peripheral region 12D, a first inner peripheral region 12A, a second inner peripheral region 12B, and a third inner peripheral region 12C.
  • the upper end inner peripheral region 12D, the first inner peripheral region 12A, the second inner peripheral region 12B, and the third inner peripheral region 12C are arranged in this order from the upper side to the lower side.
  • the inner diameter of the upper end inner peripheral region 12D, the first inner peripheral region 12A, the second inner peripheral region 12B, and the third inner peripheral region 12C decreases in this order.
  • the upper end inner peripheral region 12D is substantially circular with a fourth inner diameter D4 when viewed from the axial direction.
  • the first inner peripheral region 12A is a circle having an inner diameter of a first inner diameter D1 when viewed from the axial direction.
  • the first inner peripheral area 12A is located below the upper end inner peripheral area 12D.
  • the second inner peripheral area 12B has a substantially circular inner diameter D2 when viewed from the axial direction.
  • the second inner peripheral area 12B is located below the first inner peripheral area 12A.
  • the inner diameter of the third inner peripheral region 12C is substantially circular with a third inner diameter D3 when viewed from the axial direction.
  • the third inner peripheral area 12C is located below the second inner peripheral area 12B.
  • the first inner diameter D1 is smaller than the fourth inner diameter D4.
  • the second inner diameter D2 is smaller than the first inner diameter D1.
  • the third inner diameter D3 is smaller than the second inner diameter D2. That is, the first inner diameter D1 to the fourth inner diameter D4 have a relationship of D4> D1> D2> D3.
  • the third inner peripheral region 12C faces the outer peripheral surface of the stator 40 in the radial direction.
  • the inner peripheral surface 12 of the housing cylinder portion 11 has the third inner peripheral region 12C, and fits with the outer peripheral surface of the stator 40 in the third inner peripheral region 12C. Therefore, the positioning of the stator 40 in the radial direction with respect to the housing 10 can be easily performed.
  • the term “fit” includes at least one of “facing” and “contacting”. Further, the “fitting” may be performed directly or indirectly via a rib or the like.
  • the bottom 15 is located at the lower end of the housing cylinder 11.
  • the bottom 15 covers the lower opening of the housing cylinder 11.
  • the lower end of the housing cylinder 11 is formed integrally with the bottom 15.
  • a lower bearing holding portion 15a is provided at the center of the bottom 15 in a plan view.
  • the lower bearing holding portion 15a is a concave portion that is recessed downward in the axial direction.
  • the lower bearing holding part 15a holds the lower bearing 51 inside.
  • an elastic member for example, a preload spring
  • the flange 16 is located at the upper end of the housing cylinder 11.
  • the flange 16 extends radially outward from the upper end of the housing cylinder 11.
  • the housing 10 is fixed to the cover member 20 at the flange portion 16.
  • the cover member 20 is mounted on the upper side of the housing 10.
  • the cover member 20 covers the stator 40, the bus bar assembly 60, and the circuit board 70 from above.
  • the cover member 20 is located above a bracket 61 of the bus bar assembly 60 described later.
  • the cover member 20 holds the upper bearing 52.
  • the material of the cover member 20 is, for example, metal.
  • the cover member 20 includes a tubular portion (hereinafter, a cover tubular portion) 21, a lid portion 22, and a cover flange portion 24.
  • the cover tube portion 21 has a substantially cylindrical shape extending along the axial direction about the center axis J.
  • the cover tube portion 21 opens downward.
  • the cover tube portion 21 surrounds a wall portion 62 of the bus bar assembly 60 described below from the radial outside.
  • the lid 22 is located at the upper end of the cover tube 21.
  • the cover 22 covers the upper opening of the cover tube 21.
  • An upper bearing holding part 22a is provided at the center of the lid part 22 in a plan view.
  • the upper bearing holding portion 22a is a recess formed by the cover tube portion 21 and the lid portion 22.
  • the upper bearing holding part 22a holds the upper bearing 52 inside.
  • a central hole 22b penetrating the lid portion 22 in the axial direction is provided at the center of the upper bearing holding portion 22a in a plan view (that is, substantially the center of the lid portion 22 in a plan view).
  • the shaft 31 is passed through the central hole 22b.
  • the cover flange 24 is located at the lower end of the cover tube 21.
  • the cover flange 24 extends radially outward from the lower end of the cover tube 21.
  • the cover flange 24 extends in the circumferential direction.
  • the cover flange portion 24 is substantially annular in plan view.
  • a caulking portion 24a is provided on the outer edge of the cover tube portion 21 and extends downward. That is, the cover member 20 has the caulked portion 24a.
  • the cover member 20 is attached to the opening of the housing 10, the swaged portion 24 a is plastically deformed along the lower surface of the flange 16 of the housing 10. Thereby, the cover member 20 is fixed to the housing 10.
  • the rotor 30 is rotatable around a central axis J extending along the vertical direction.
  • the rotor 30 has a shaft 31, a rotor core 32, a rotor magnet 33, a sensor magnet holding member 35, and a sensor magnet 34.
  • the shaft 31 has a columnar shape extending in the axial direction about the central axis J.
  • the shaft 31 is rotatably supported by the lower bearing 51 and the upper bearing 52.
  • the upper (+ Z side) end of the shaft 31 projects outside from the central hole 22b of the cover member 20 (more specifically, the lid 22).
  • the shaft 31 may be solid or hollow.
  • the sensor magnet holding member 35 is a substantially annular member.
  • the sensor magnet holding member 35 is fixed to the outer peripheral surface of the shaft 31.
  • the sensor magnet holding member 35 rotates around the central axis J together with the shaft 31.
  • the sensor magnet holding member 35 is fixed to the outer peripheral surface of the shaft 31 by, for example, press fitting or bonding.
  • the sensor magnet 34 is substantially annular, and N poles and S poles are alternately arranged along the circumferential direction.
  • the sensor magnet 34 is fixed to the lower surface of the sensor magnet holding member 35.
  • the sensor magnet 34 is fixed to the shaft 31 via a sensor magnet holding member 35.
  • the sensor magnet 34 rotates around the central axis J together with the shaft 31.
  • the sensor magnet 34 is located below the upper bearing 52.
  • the sensor magnet 34 is located above the circuit board 70.
  • the sensor magnet 34 faces the rotation sensor 72 of the circuit board 70 in the axial direction.
  • the number of sensor magnets 34 is not limited to the above, and a plurality of sensor magnets 34 may be provided. In this case, a plurality of sensor magnets 34 are arranged in the circumferential direction. Further, the sensor magnet is not limited to an annular shape, and may have another shape.
  • the rotor core 32 has a cylindrical shape extending in the axial direction.
  • the rotor core 32 has a through hole that penetrates in the axial direction and through which the shaft 31 passes.
  • the rotor core 32 is fixed to the outer peripheral surface of the shaft 31.
  • the rotor magnet 33 is held by the rotor core 32.
  • the rotor core 32 and the rotor magnet 33 rotate integrally with the shaft 31.
  • the rotor core 32 is a laminated steel sheet in which a plurality of electromagnetic steel sheets are laminated.
  • the rotor core 32 may be a dust core.
  • the rotor magnet may be arranged on the outer peripheral surface of the rotor core 32, or may be partly embedded and held in the rotor core 32.
  • the rotor core 32 may be directly fixed to the shaft 31 by press-fitting, bonding, or the like, or may be indirectly fixed via a resin member, a metal member, or the like.
  • Stator 40 is housed in housing 10.
  • the stator 40 is located radially outside the rotor 30 and radially opposes the rotor 30.
  • the stator 40 surrounds the rotor 30 from the radial outside.
  • the stator 40 has a stator core 41, a plurality of coils 43, an insulator 44, and a relay bus bar 93.
  • the stator core has a cylindrical shape extending in the axial direction.
  • the outer peripheral surface of the stator core 41 is fitted to the inner peripheral surface 12 of the housing 10. More specifically, the outer peripheral surface of stator core 41 fits into third inner peripheral region 12C of inner peripheral surface 12. More preferably, stator core 41 is fixed to housing 10 by press-fitting, bonding, or the like. Thereby, the stator 40 is positioned and fixed to the housing 10.
  • the stator core 41 has a core back portion 41a and a plurality of teeth portions 41b.
  • the core back portion 41a has a substantially annular shape centered on the central axis J.
  • the teeth portion 41b extends radially inward from the inner surface of the core back portion 41a.
  • the plurality of teeth portions 41b are arranged at equal intervals along the circumferential direction.
  • the coil 43 is configured by winding a coil wire 43a.
  • the coil 43 is mounted on the teeth 41b via the insulator 44.
  • the plurality of coils 43 are classified into a U-phase coil, a V-phase coil, and a W-phase coil through which alternating currents whose phases are shifted when the motor 1 is driven.
  • the U-phase, V-phase and W-phase coils 43 are connected to each other in a delta connection by a relay bus bar 93 and a phase bus bar 91 described later.
  • a coil group having two coils connected in series as one set is configured in each phase. In each phase, two coil groups are connected in series via a relay bus bar 93 described later.
  • the number of coils, the number of relay bus bars 93, and the connection locations may be appropriately changed.
  • the connection method in the stator may be a star connection instead of the delta connection.
  • the bus bar assembly has a neutral bus bar instead of the relay bus bar.
  • three coil wires 43a extending from the U-phase, V-phase, and W-phase coils 43 are connected to the neutral point bus bar.
  • the neutral point bus bar functions as a neutral point connecting the U-phase, V-phase, and W-phase coils.
  • the insulator 44 is attached to the teeth 41b.
  • the insulator 44 is arranged between the coil 43 and the teeth 41b.
  • the material of the insulator 44 has an insulating property.
  • the insulator 44 is a resin having an insulating property. The insulator 44 secures insulation between the coil 43 and the teeth 41b.
  • the relay bus bar 93 is a conductive member.
  • the relay bus bar 93 is made of a conductive metal.
  • the relay bus bar 93 is supported by the insulator 44 above the stator core 41.
  • the relay bus bar 93 extends along the circumferential direction. As described above, the relay bus bar 93 connects two coil groups connected in series.
  • the circuit board 70 has a control unit that controls a current flowing to the stator 40.
  • the circuit board 70 is preferably arranged along a plane substantially orthogonal to the axial direction.
  • the circuit board 70 is held by a bracket 61 of a bus bar assembly 60 described later.
  • the circuit board 70 has a board main body 71 and a plurality of rotation sensors 72 mounted on the board main body 71.
  • the substrate main body 71 is a rigid substrate extending along a plane orthogonal to the axial direction.
  • the substrate body 71 extends in an arch around the central axis J.
  • the shaft 31 passes through the inside of the substrate body 71 in the radial direction.
  • the board main body 71 is located between the stator 40 and the cover member 20 in the axial direction.
  • the board main body 71 is provided with a printed wiring (not shown).
  • FIG. 3 is a perspective view of the bus bar assembly 60 and the circuit board 70.
  • FIG. 4 is a plan view of the bus bar assembly 60 and the circuit board 70.
  • the substrate main body 71 is provided with a plurality (five in the present embodiment) of terminal connection holes 71c and a plurality of (three in the present embodiment) positioning holes 71d and 71e. That is, the circuit board 70 is provided with the terminal connection holes 71c and the positioning holes 71d and 71e.
  • the terminal connection hole 71c and the positioning holes 71d and 71e penetrate the substrate body 71 in the axial direction.
  • a connection terminal 92a of a signal bus bar 92 described later is inserted into the terminal connection hole 71c.
  • positioning pins 63A and 63B of a bracket 61 described later are inserted into the positioning holes 71d and 71e.
  • the three positioning holes 71d and 71e are classified into two first positioning holes 71d and one second positioning hole 71e.
  • the outer shape of the first positioning hole 71d is substantially circular in plan view.
  • the second positioning hole 71e is a notch that opens at the outer edge of the circuit board 70. Therefore, the second positioning hole 71e opens not only in the upward and downward directions but also in the radially outward direction.
  • the rotation sensor 72 is attached to the upper surface 71a of the substrate main body 71.
  • the rotation sensor 72 is a Hall element.
  • the circuit board 70 is provided with three rotation sensors 72.
  • the three rotation sensors 72 are arranged in a circumferential direction.
  • the rotation sensor 72 faces the sensor magnet 34 in the axial direction.
  • the rotation sensor 72 detects a change in magnetic flux due to rotation of the sensor magnet 34 around the central axis J.
  • the rotation sensor 72 may be another type of sensor such as a magnetoresistive element. When the rotation sensor 72 is a magnetoresistive element, the number of the rotation sensors 72 may be only one, or may be two or more.
  • the bus bar assembly 60 is located above the stator 40.
  • the bus bar assembly 60 is substantially annular in plan view.
  • the shaft 31 passes through a radially inner through hole of the bus bar assembly 60.
  • the bus bar assembly 60 has a bracket 61 and a plurality of bus bars.
  • the plurality of busbars are classified into a plurality (three in this embodiment) of phase busbars (busbars) 91 and a plurality of (five in this embodiment) signal busbars (busbars) 92.
  • the motor 1 includes the bracket 61, the phase bus bar 91, and the signal bus bar 92.
  • the bus bars that is, the plurality of phase bus bars 91 and the plurality of signal bus bars 92 are conductive members.
  • the phase bus bar 91 and the signal bus bar 92 are made of a conductive metal.
  • the phase bus bar 91 and the signal bus bar 92 are embedded in the bracket 61 by, for example, insert molding. That is, the phase bus bar 91 and the signal bus bar 92 are held by the bracket 61.
  • the -phase bus bar 91 electrically connects an external device (not shown) and the stator 40, and supplies a driving current supplied from the external device to the stator 40.
  • the three phase bus bars 91 of the present embodiment are connected to coil wires 43a extending from the coils 43 constituting the U, V and W phases, respectively.
  • the drive current supplied to the coil 43 via the phase bus bar 91 is controlled, for example, according to the rotation angle of the rotor 30 calculated based on the value detected by the rotation sensor 72.
  • the phase bus bar 91 is partially embedded and held in the bracket 61.
  • a first end of the phase bus bar 91 is exposed from the bracket 61 and connected to the coil wire 43a.
  • the second end of the phase bus bar 91 is exposed inside a downward opening (not shown) provided in the connector portion 69 of the bracket 61.
  • An external device (not shown) is connected to the second end of the phase bus bar 91 exposed inside the connector section 69.
  • the signal bus bar 92 electrically connects an external device (not shown) to the circuit board 70.
  • the signal bus bar 92 is partially embedded and held in the bracket 61.
  • a connection terminal 92a exposed from the bracket 61 is provided at a first end of the signal bus bar 92.
  • the connection terminal 92a is connected to the circuit board 70.
  • the signal bus bar 92 is electrically connected to the rotation sensor 72 of the circuit board 70 via the printed wiring of the circuit board 70.
  • the second end of the signal bus bar 92 is exposed inside a downward opening (not shown) provided in the connector portion 69 of the bracket 61.
  • An external device (not shown) is connected to the second end of the signal bus bar 92 exposed inside the connector section 69.
  • FIG. 5 is a cross-sectional view illustrating a connection structure between the connection terminal 92 a of the signal bus bar 92 and the circuit board 70.
  • the connection terminal 92a and the circuit board 70 are connected to each other at a terminal connection portion 99. That is, the signal bus bar 92 is connected to the circuit board 70 at the terminal connection part 99.
  • illustration of the terminal connection portion 99 is omitted.
  • connection terminal 92a extends upward from the lower side of the board body 71 and is inserted into the terminal connection hole 71c.
  • the tip of the connection terminal 92a protrudes above the substrate body 71.
  • the terminal connection portion 99 is located on the upper surface 71a of the circuit board 70.
  • the terminal connection portion 99 electrically connects the connection terminal 92a and a printed wiring (not shown) of the circuit board 70.
  • the terminal connection portion 99 is a solder portion, and the molten solder is supplied from above using a soldering device such as a soldering iron with the connection terminal 92a inserted into the terminal connection hole 71c.
  • the terminal connection portion 99 has a shape that is raised upward with respect to the upper surface 71 a of the circuit board 70.
  • the bracket 61 is located above the stator 40.
  • the bracket 61 is located below the cover member 20.
  • the bracket 61 is made of, for example, resin.
  • the bracket 61 holds the phase bus bar 91, the signal bus bar 92, and the circuit board 70.
  • the bracket 61 has a main body 64, a board support 68, a wall 62, an insertion tube 65, and a connector 69.
  • the main body 64 is substantially annular with the center axis J as the center.
  • the wall 62 is located above the main body 64.
  • the wall 62 surrounds the central axis.
  • the insertion tube 65 is located below the main body 64.
  • the substrate support 68 protrudes radially inward from the inner peripheral surface of the main body 64.
  • the connector 69 extends radially outward from the main body 64.
  • a socket (not shown) of an external device (not shown) is connected to the connector section 69.
  • the main body 64 is disposed radially inside the housing cylinder 11 of the housing 10.
  • the outer peripheral surface of the main body portion 64 facing radially outward faces the upper end inner peripheral region 12D of the inner peripheral surface 12 of the housing cylinder portion 11 in the radial direction.
  • Part of the phase bus bar 91 and part of the signal bus bar 92 are embedded in the main body 64.
  • the outer peripheral surface of the main body 64 facing outward in the radial direction may radially contact the upper inner peripheral region 12 ⁇ / b> D of the inner peripheral surface 12 of the housing cylinder 11.
  • the upper surface 64a of the main body 64 contacts the lower surface 24b of the cover flange 24 of the cover member 20 in the axial direction.
  • the upper surface 64a of the main body 64 is provided with a concave groove 64g extending along the circumferential direction. That is, the upper surface 64a of the bracket 61 is provided with the concave groove 64g.
  • the concave groove 64g has a substantially annular shape centered on the central axis J in plan view.
  • the upper O-ring 82 is housed inside the concave groove 64g.
  • the upper O-ring 82 is substantially annular.
  • the upper O-ring 82 extends in the circumferential direction.
  • the cross-sectional shape of the upper O-ring 82 is, for example, substantially circular.
  • the upper O-ring 82 contacts the lower surface of the cover flange 24. Further, the upper O-ring 82 contacts the bottom surface of the concave groove 64g and the surface facing inward in the radial direction of the concave groove 64g inside the concave groove 64g.
  • the upper O-ring 82 is disposed between the upper surface 64 a of the bracket 61 and the lower surface 24 b of the cover flange 24.
  • the upper O-ring 82 is sandwiched between the bracket 61 and the cover flange 24 from both sides in the axial direction and is compressed. Thereby, the upper O-ring 82 suppresses intrusion of moisture and the like into the inside of the motor 1 from between the bracket 61 and the cover member 20.
  • the cross-sectional shape of the upper O-ring 82 is not limited to a circle, but may be a polygon or an ellipse, and is not particularly limited.
  • the upper O-ring 82 contacts the bottom surface of the concave groove 64g and at least one of a surface facing radially inward and a surface facing radially outward of the concave groove 64g inside the concave groove 64g. Is also good.
  • the substrate supporting portion 68 is a plate extending along a plane substantially perpendicular to the axial direction.
  • the substrate support portion 68 is disposed radially inside the main body portion 64.
  • the board supporting section 68 supports the circuit board 70 from below.
  • the substrate support section 68 has a plurality of (three in this embodiment) pedestals 63C and 63D and a plurality (three in this embodiment) of positioning pins 63A and 63B.
  • the three pedestals 63C and 63D are classified into two first pedestals 63C and one second pedestal 63D.
  • the three positioning pins 63A and 63B are classified into two first positioning pins 63A and one second positioning pin 63B.
  • the first positioning pin 63A protrudes from the upper surface of the first pedestal 63C.
  • the second positioning pin 63B protrudes from the upper surface of the second pedestal 63D.
  • the first pedestal portion 63C and the first positioning pin 63A are separated radially inward from the inner peripheral surface of the wall portion 62.
  • the second pedestal portion 63D and the second positioning pin 63B are connected to the inner peripheral surface of the wall portion 62.
  • the pedestals 63C and 63D are located on the upper surface of the substrate support 68 and protrude upward with respect to the upper surface.
  • the pedestals 63C and 63D are columnar projections.
  • the plurality of pedestals 63C, 63D are arranged along the inner peripheral surface of the wall 62.
  • the upper surfaces of the pedestals 63C and 63D are flat surfaces substantially orthogonal to the axial direction.
  • the upper surfaces of the pedestals 63C and 63D are in contact with the lower surface of the circuit board 70.
  • the board supporting portion 68 supports the circuit board 70 on the upper surfaces of the pedestals 63C and 63D.
  • the pedestals 63C and 63D are not necessarily limited to a columnar shape, and may be convex portions having other shapes such as a polygonal column. Further, the pedestals 63C and 63D may be hollow.
  • the circuit board 70 is supported on the upper surfaces of the pedestals 63C and 63D, which are flat surfaces substantially perpendicular to the axial direction. Therefore, the circuit board 70 can be arranged with high accuracy along a plane substantially orthogonal to the central axis J.
  • the board supporting portion 68 of the present embodiment supports the circuit board 70 by a plurality of pedestals 63C and 63D arranged discretely. Therefore, as compared with the case where the circuit board 70 is supported on one surface having a large area, the board supporting portion 68 has a play of the circuit board 70 even when the circuit board 70 is warped. Can be suppressed.
  • a mounting component (such as an electronic component) can be arranged in a region of the lower surface of the substrate body 71 that does not contact the pedestals 63C and 63D.
  • the plurality of positioning pins 63A and 63B are arranged along the inner peripheral surface of the wall portion 62.
  • the positioning pins 63A and 63B are inserted into positioning holes 71d and 71e provided in the circuit board 70. More specifically, first positioning pin 63A is inserted into first positioning hole 71d, and second positioning pin 63B is inserted into second positioning hole 71e.
  • the upper ends of the positioning pins 63A and 63B protrude above the upper surface 71a of the substrate body 71.
  • the circuit board 70 can be easily positioned substantially horizontally with respect to the bracket 61 by inserting the plurality of positioning pins 63A and 63B into the positioning holes 71d and 71e. Further, according to the present embodiment, since the plurality of positioning pins 63A and 63B are arranged along the inner peripheral surface of the wall portion 62, the positioning accuracy of the circuit board 70 with respect to the bracket 61 in the circumferential direction can be increased.
  • the first positioning pin 63A is substantially cylindrical.
  • the outer diameter of the first positioning pin 63A is smaller than the inner diameter of the first positioning hole 71d.
  • the shape of the first positioning pin 63A is not limited to a columnar shape, and may be another shape such as a polygonal column.
  • FIG. 6 is a schematic cross-sectional view of the first positioning pin 63A.
  • a welding portion 63Aa is provided at the tip of the first positioning pin 63A.
  • the welding portion 63Aa is not provided at the tip of the second positioning pin 63B.
  • the welded portion 63Aa is formed in a heat caulking step. That is, the welded portion 63Aa is formed when the tip of the first positioning pin 63A is melted and solidified again. 3 and 4, the illustration of the welded portion 63Aa is omitted.
  • the welded portion 63Aa has a substantially hemispherical shape that is convex upward.
  • the welding portion 63Aa covers the first positioning hole 71d in plan view.
  • the welding portion 63Aa contacts the upper surface 71a of the substrate main body 71.
  • the welded portion 63 ⁇ / b> Aa prevents the circuit board 70 from being detached from the bracket 61.
  • the second positioning pin 63B and the second pedestal portion 63D have a shape connected to the inner peripheral surface of the wall portion 62. That is, in the second positioning pin 63B and the second pedestal portion 63D, the outer surface facing in the direction orthogonal to the axial direction is connected to the inner peripheral surface of the wall portion 62.
  • the second positioning pin 63B and the second pedestal 63D function as ribs for reinforcing the wall 62. For this reason, the deformation of the wall portion 62 due to sink when molding the bracket 61 can be suppressed.
  • the wall portion 62 has a substantially cylindrical shape centered on the central axis J. That is, the wall 62 surrounds the central axis J.
  • the wall 62 projects upward from the main body 64. That is, the wall 62 projects upward with respect to the substrate support 68.
  • the inner peripheral surface of the wall portion 62 is continuous with the inner peripheral surface of the main body portion 64 in the axial direction.
  • the wall 62 surrounds the circuit board 70. That is, the circuit board 70 is arranged radially inside the wall portion 62.
  • the wall portion 62 is inserted into the cover tube portion 21 of the cover member 20.
  • the outer diameter of the outer peripheral surface of the wall portion 62 is smaller than the inner diameter of the inner peripheral surface of the cover tube portion 21.
  • the outer peripheral surface of the wall portion 62 radially opposes the inner peripheral surface of the cover tube portion 21.
  • the outer peripheral surface of the wall 62 functions as a guide when the wall 62 is inserted into the cover tube 21. According to the present embodiment, by providing the wall portion 62, the positioning of the cover member 20 with respect to the bracket 61 can be facilitated.
  • the outer peripheral surface of the wall portion 62 and the inner peripheral surface of the cover tube portion 21 are each substantially circular in plan view.
  • the shapes of the outer peripheral surface of the wall portion 62 and the inner peripheral surface of the cover cylindrical portion 21 are not limited as long as the wall portion 62 can be inserted into the cover cylindrical portion 21.
  • the term “tube portion” is not limited to a cylindrical shape having a circular shape in plan view, but is a concept including, for example, a rectangular tube shape.
  • the wall portion 62 is provided with a cutout portion 62a extending downward from the upper end.
  • the notch 62a has a bottom surface 62aa facing upward.
  • the bottom surface 62aa extends in an arch shape along the circumferential direction.
  • a terminal connecting portion 99 for connecting the signal bus bar 92 and the board main body 71 is provided on the upper surface of the circuit board 70.
  • the terminal connection part 99 is a solder part.
  • the operator inserts a soldering iron through the cutout portion 62a.
  • the notch 62a is provided in the wall 62, so that the soldering iron can easily access the upper surface 71a of the circuit board 70. Thereby, the connection process between the signal bus bar 92 and the circuit board 70 is facilitated, and the workability of the connection process can be improved.
  • the bottom surface 62aa of the cutout portion 62a is located below the upper end of the terminal connection portion 99. For this reason, in the connection step, by inserting the soldering iron into the cutout portion 62a, access to the terminal connection portion 99 is further facilitated. Thereby, the workability of the step of connecting the signal bus bar 92 and the circuit board 70 can be further improved.
  • the circumferential position of the terminal connection portion 99 and the circumferential position of the cutout portion 62a overlap each other. For this reason, the operator can make the soldering iron access the terminal connecting portion 99 from the radially outer side of the substantially cylindrical wall portion 62 via the cutout portion 62a. Therefore, according to the present embodiment, the workability of the step of connecting the signal bus bar 92 and the circuit board 70 can be further improved.
  • the terminal connection portion that connects the signal bus bar 92 and the circuit board 70 is a solder portion.
  • the terminal connection portion may have another structure.
  • the terminal connection portion may have a press-fit structure.
  • the connection terminal of the signal bus bar is a press-fit pin
  • the signal bus bar and the circuit board are connected by press-fitting the pre-fit pin into a terminal connection hole provided in the board body.
  • a press-fit structure is employed as the terminal connection portion, in the connection step, the circuit board is pressed downward around the terminal connection hole using a jig, and the connection terminal, which is a press-fit pin, is pressed into the terminal connection hole.
  • a plurality of first ribs 62c are provided on the outer surface of the wall portion 62.
  • the first rib 62c extends upward along the axial direction from the upper surface 64a of the main body 64.
  • the first ribs 62c are arranged at equal intervals along the circumferential direction.
  • the wall portion 62 is provided with six first ribs 62c. It is preferable that three or more first ribs 62c are provided on the wall portion 62.
  • the first rib 62 c contacts the inner surface of the cover tube 21.
  • the plurality of first ribs 62 c perform radial positioning of the cover tubular portion 21 with respect to the bracket 61. That is, according to the present embodiment, by inserting the wall portion 62 into the cover tube portion 21, it is possible to make the central axis of the wall portion 62 substantially coincide with the center axis of the cover tube portion 21.
  • the diameter of a virtual circle connecting the radial outer ends of the plurality of first ribs 62 c is larger than the inner diameter of the inner peripheral surface of the cover tube portion 21.
  • the first rib 62c is elastically deformed. Therefore, the step of inserting the wall part 62 into the cover cylinder part 21 is a press-fitting step. According to the present embodiment, it is possible to suppress the displacement of the cover member 20 with respect to the bracket 61, and it is possible to increase the positioning accuracy of the cover member 20 with respect to the bracket 61.
  • the first rib 62c may be elastically deformed and plastically deformed.
  • the cover member 20 supports the upper bearing 52. Therefore, by increasing the positioning accuracy of the cover member 20, the positioning accuracy of the upper bearing 52 can be increased, and the rotation efficiency of the shaft 31 supported by the upper bearing 52 can be increased.
  • a tapered surface 62ca approaching the center axis J as it goes upward is provided at the upper end of the first rib 62c. Since the tapered surface 62ca is provided at the upper end of the first rib 62c, the wall 62 can be inserted into the cover cylinder 21 without the upper end of the first rib 62c being caught by the cover cylinder 21. The process becomes easy.
  • the upper end of the first rib 62c is located below the upper end of the wall portion 62.
  • the wall portion 62 is provided with the cutout portion 62a extending downward from the upper end. Therefore, the strength near the upper end of the wall portion 62 is lower than that near the lower end. Since the first rib 62c receives a stress in the radially inward direction from the cover cylinder 21 (see FIG. 2), when the first rib 62c extends to the upper end of the wall 62, damage occurs near the upper end of the wall 62. There is a fear. According to the present embodiment, since the upper end of the first rib 62c is located below the upper end of the wall 62, damage to the wall 62 when radially inward stress acts on the first rib 62c. Can be suppressed.
  • the upper end of the first rib 62c is located below the bottom surface 62aa of the notch 62a.
  • the wall portion 62 has a lower strength in a region where the cutout portion 62a is provided in the axial direction than the strength below the cutout portion 62a. According to the present embodiment, it is possible to further suppress damage to the wall portion 62 when a radially inward stress acts on the first rib 62c.
  • the axial position of the upper end of the first rib 62c may coincide with the bottom surface 62aa of the notch 62a. Even in this case, the above effects can be obtained. That is, the upper end of the first rib 62c is located below the bottom surface 62aa of the notch 62a, or the axial position matches the bottom surface 62aa of the notch 62a.
  • the relationship between the second positioning pin 63B, the second pedestal portion 63D, and the first rib 62c will be described with reference to FIG.
  • the outer surfaces of the second positioning pin 63B and the second pedestal 63D are connected to the inner peripheral surface of the wall 62. That is, the second positioning pin 63B and the second pedestal 63D reinforce the wall 62. For this reason, the second positioning pin 63B and the second pedestal 63D suppress damage to the wall 62 when radially inward stress acts on the first rib 62c.
  • a plurality of second ribs 62d arranged in the circumferential direction are provided in addition to the second positioning pin 63B and the second pedestal portion 63D.
  • the second rib 62d reinforces the wall 62 together with the second positioning pin 63B and the second pedestal 63D.
  • the second positioning pin 63B is located near the first rib 62c. More specifically, it is preferable that the angle ⁇ between the straight line connecting the second positioning pin 63B and the center axis J and the straight line connecting the first rib 62c and the first rib 62c is about 10 ° or less. That is, the second positioning pin 63B and the first rib 62c are preferably arranged within about 10 ° about the center axis J.
  • the upper end of the second positioning pin 63B is located above the upper end of the first rib 62c. Therefore, damage to the wall portion 62 when a radially inner stress acts on the first rib 62c can be effectively suppressed.
  • the axial position of the upper end of the second positioning pin 63B may coincide with the upper end of the first rib 62c. Even in this case, the above effects can be obtained. That is, the upper end of the second positioning pin 63B may be located above the upper end of the first rib 62c, or the axial position may be coincident with the upper end of the first rib 62c.
  • the insertion tube portion 65 extends downward from the main body portion 64.
  • the insertion cylinder portion 65 has a substantially cylindrical shape extending along the axial direction with the center axis J as the center.
  • the insertion tube 65 is inserted between the stator 40 and the inner peripheral surface 12 of the housing tube 11 in the radial direction.
  • the insertion tube portion 65 has an outer peripheral surface 66 facing radially outward.
  • the outer peripheral surface 66 is divided into a plurality of regions arranged in the axial direction and having different outer diameters.
  • the outer peripheral surface 66 has an upper peripheral region 66C, an intermediate peripheral region 66D, and a lower peripheral region 66E.
  • the upper peripheral region 66C, the intermediate peripheral region 66D, and the lower peripheral region 66E are arranged in this order from the upper side to the lower side.
  • the outer diameter of the upper peripheral area 66C, the intermediate peripheral area 66D, and the lower peripheral area 66E decreases in this order.
  • the upper end outer peripheral area 66C is substantially circular when viewed from the axial direction.
  • the upper end outer peripheral region 66 ⁇ / b> C is axially continuous with the outer peripheral surface of the main body 64.
  • the upper end outer peripheral region 66C radially opposes the upper end inner peripheral region 12D of the storage tube portion 11.
  • the outer diameter of the upper end outer peripheral region 66C is smaller than the inner diameter (fourth inner diameter D4) of the upper end inner peripheral region 12D. For this reason, a minute gap is provided between the upper end outer peripheral region 66C and the upper end inner peripheral region 12D in the radial direction.
  • the intermediate outer peripheral region 66D is substantially circular when viewed from the axial direction.
  • the intermediate outer peripheral region 66D radially opposes the first inner peripheral region 12A of the housing cylinder portion 11.
  • the outer diameter of the intermediate outer peripheral area 66D is smaller than the inner diameter (first inner diameter D1) of the first inner peripheral area 12A. Therefore, a gap is provided between the intermediate outer peripheral region 66D and the first inner peripheral region 12A.
  • a second step surface 66b is provided between the middle outer peripheral region 66D and the upper end outer peripheral region 66C. That is, the outer peripheral surface 66 of the insertion tube portion 65 has the second step surface 66b.
  • the second step surface 66b faces downward.
  • the second step surface 66b extends radially outward from the upper end of the intermediate outer peripheral region 66D.
  • the second step surface 66b extends along the circumferential direction.
  • the second step surface 66b is in axial contact with the third step surface 12a provided on the inner peripheral surface 12 of the housing cylinder portion 11.
  • the third step surface 12a is provided between the first inner peripheral region 12A of the inner peripheral surface 12 and the upper end inner peripheral region 12D. That is, the inner peripheral surface 12 of the housing cylinder 11 has the third step surface 12a.
  • the third step surface 12a faces upward.
  • the third step surface 12a extends radially outward from the upper end of the first inner peripheral region 12A.
  • the second step surface 66b of the insertion tube portion 65 comes into contact with the third step surface 12a of the housing tube portion 11, thereby easily positioning the bracket 61 with respect to the housing 10 in the axial direction. be able to.
  • the lower peripheral region 66E has a first peripheral region 66A and a second peripheral region 66B. That is, the outer peripheral surface 66 of the insertion tube 65 has the first outer peripheral region 66A and the second outer peripheral region 66B.
  • the first outer peripheral area 66A and the second outer peripheral area 66B are arranged in the axial direction.
  • the second outer peripheral area 66B is located below the first outer peripheral area 66A.
  • the first outer peripheral region 66A is substantially circular when viewed from the axial direction.
  • the first outer peripheral region 66A radially opposes the first inner peripheral region 12A of the housing cylinder portion 11.
  • the outer diameter of the first outer peripheral area 66A is sufficiently smaller than the inner diameter (first inner diameter D1) of the first inner peripheral area 12A. Therefore, a gap is provided between the first outer peripheral region 66A and the first inner peripheral region 12A.
  • a lower O-ring 81 is disposed between the first outer peripheral region 66A and the first inner peripheral region 12A.
  • the lower O-ring 81 is substantially annular.
  • the lower O-ring 81 extends along the circumferential direction.
  • the cross-sectional shape of the lower O-ring 81 is substantially circular.
  • the lower O-ring 81 is sandwiched and compressed between the first outer peripheral area 66A and the first inner peripheral area 12A.
  • the cross-sectional shape of the lower O-ring 81 is not limited to a circle, but may be a polygon including a rectangle, an ellipse, or the like, and is not particularly limited.
  • the lower O-ring 81 and the upper O-ring 82 of the present embodiment have the same shape.
  • the lower O-ring 81 contacts the first inner peripheral area 12A from the radial inside.
  • the upper O-ring 82 comes into contact with the surface facing inward in the radial direction of the concave groove 64g from the radial inside.
  • the inner diameter of the first inner peripheral region 12A is substantially equal to the inner diameter of the surface facing inward in the radial direction of the concave groove 64g. Therefore, in the radial direction, the distance from the central axis J to the lower O-ring 81 can be substantially the same as the distance from the central axis J to the upper O-ring 82.
  • the diameter of the lower O-ring 81 and the diameter of the upper O-ring 82 are equal to each other.
  • the lower O-ring 81 and the upper O-ring 82 have the same shape, there is no need to use two types of O-rings and only one type of O-ring is used. Types can be reduced. Further, by making the lower O-ring 81 and the upper O-ring 82 have the same shape, a worker or the like identifies the upper O-ring 82 and the lower O-ring 81 in the assembling process and arranges them at respective positions. No need. Therefore, the assembly process can be simplified.
  • a first step surface 66a is provided between the lower end outer peripheral region 66E and the intermediate outer peripheral region 66D. That is, the outer peripheral surface 66 of the insertion tube 65 has the first step surface 66a.
  • the first step surface 66a faces downward.
  • the first step surface 66a extends radially outward from the upper end of the first outer peripheral region 66A.
  • the first step surface 66a extends along the circumferential direction.
  • the lower O-ring 81 contacts the first step surface 66a from below.
  • the lower O-ring 81 comes into contact with the first step surface 66a, and the upward movement of the lower O-ring 81 is prevented. Limited. That is, according to the present embodiment, the provision of the first step surface 66a allows the lower O-ring 81 to be easily positioned in the axial direction.
  • the second outer peripheral region 66B is radially opposed to the second inner peripheral region 12B of the housing cylinder portion 11.
  • the second outer peripheral area 66B and the second inner peripheral area 12B fit with each other. Thereby, the positioning of the bracket 61 with respect to the housing 10 in the radial direction can be easily performed.
  • the outer peripheral surface 66 of the insertion cylinder 65 is fitted to the housing cylinder 11 in a second outer peripheral area 66B below the first outer peripheral area 66A that compresses the lower O-ring 81.
  • the insertion tube portion 65 is inserted into the housing 10 with the lower O-ring 81 attached to the first outer peripheral region 66A. Since the second outer peripheral region 66 ⁇ / b> B is located below the lower O-ring 81, the second outer peripheral region 66 ⁇ / b> B contacts the inner peripheral surface 12 of the housing cylinder 11 before the lower O-ring 81 contacts the housing cylinder 11.
  • the axial distance from the upper end of the first inner peripheral area 12A to the lower end of the contact portion between the lower O-ring 81 and the first inner peripheral area 12A is defined as a first length h1.
  • the axial fitting length between the second inner peripheral area 12B and the second outer peripheral area 66B is defined as a second length h2.
  • the first length h1 is a distance that the lower O-ring 81 moves while contacting the inner peripheral surface 12 of the housing cylinder 11 in the assembling process.
  • the second length h2 is a distance by which the second outer peripheral region 66B moves while contacting the inner peripheral surface 12 of the housing cylinder 11 in the assembling process.
  • the first length h1 is smaller than the second length h2. Therefore, in the assembling process, the second outer peripheral region 66 ⁇ / b> B contacts the inner peripheral surface 12 before the lower O-ring 81. That is, in the stage of contact between the lower O-ring 81 and the inner peripheral surface 12 in the assembling process, the second outer peripheral region 66 ⁇ / b> B already contacts the inner peripheral surface 12, and the bracket 61 is radially aligned with the housing 10. You. According to the present embodiment, the occurrence of biting and twisting of the lower O-ring 81 can be more reliably suppressed.
  • the second outer peripheral region 66B is provided with six protrusions 67 arranged in the circumferential direction.
  • the protrusion 67 protrudes radially outward in the second outer peripheral region 66B.
  • the protrusion 67 extends in the axial direction from the lower end to the upper end of the second outer peripheral region 66B.
  • the protrusion 67 extends in a rib shape along the axial direction.
  • the radially outer end of the convex portion 67 of the convex portion 67 continues to the first outer peripheral region 66A. That is, the diameter of the virtual circle connecting the radially outer ends of the protrusions 67 is equal to the outer diameter of the first outer peripheral region 66A.
  • the diameter of a virtual circle connecting the radially outer ends of the convex portions 67 is equal to or slightly larger than the inner diameter of the second inner peripheral region 12B.
  • the second outer peripheral region 66B fits with the second inner peripheral region 12B at the protrusion 67.
  • the protrusion 67 that projects outward in the radial direction is fitted to the inner peripheral surface 12 of the housing cylinder 11. Since the convex portions 67 are discretely arranged along the circumferential direction, it is easy to increase the positional accuracy of the radially outer end. As a result, the positioning accuracy of the bracket 61 with respect to the housing 10 in the radial direction can be improved.
  • the second outer peripheral region 66B has six convex portions 67.
  • the second outer peripheral region 66B preferably has three or more convex portions 67. Further, it is preferable that three or more convex portions 67 are arranged at equal intervals along the circumferential direction.
  • the positioning accuracy of the bracket 61 with respect to the housing 10 in the radial direction can be improved in a state where the convex portion 67 and the second inner peripheral region 12B are fitted.
  • Embodiments of the present disclosure are widely used in various equipment including various motors, such as electric brakes, electric clutches, various types of vehicle-mounted motors such as electric power steering devices, vacuum cleaners, dryers, ceiling fans, washing machines, refrigerators, and the like. obtain.
  • various motors such as electric brakes, electric clutches, various types of vehicle-mounted motors such as electric power steering devices, vacuum cleaners, dryers, ceiling fans, washing machines, refrigerators, and the like. obtain.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

La présente invention concerne, selon un mode de réalisation, un moteur doté d'un rotor, d'un stator, d'un support positionné sur le côté supérieur du stator et d'un boîtier dans lequel le stator est logé. Le boîtier comprend un cylindre de boîtier entourant le stator à partir du côté radialement externe. La paroi circonférentielle interne du cylindre de boîtier comprend une première zone circonférentielle interne ayant un premier diamètre interne et une seconde zone circonférentielle interne positionnée davantage vers le bas que la première zone circonférentielle interne et ayant un second diamètre interne plus petit que le premier diamètre interne. Le support comprend un cylindre d'insertion qui s'étend vers le bas et qui est inséré entre le stator et la surface circonférentielle interne du cylindre de boîtier dans la direction radiale. La surface circonférentielle externe du cylindre d'insertion comprend une première zone circonférentielle externe faisant face à la première zone circonférentielle interne dans la direction radiale et une seconde zone circonférentielle externe qui est positionnée au-dessous de la première zone circonférentielle externe et qui fait face à la seconde zone circonférentielle interne dans la direction radiale. Un premier élément d'étanchéité s'étendant le long de la direction circonférentielle est placé entre la première zone circonférentielle interne et la première zone circonférentielle externe. La seconde zone circonférentielle interne et la seconde zone circonférentielle externe sont fixées l'une à l'autre.
PCT/JP2019/037789 2018-09-28 2019-09-26 Moteur WO2020067254A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-185205 2018-09-28
JP2018185205 2018-09-28

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WO2020067254A1 true WO2020067254A1 (fr) 2020-04-02

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5421369U (fr) * 1977-07-15 1979-02-10
JPH1118353A (ja) * 1997-06-27 1999-01-22 Jidosha Denki Kogyo Co Ltd 小型モータ
JP2010172086A (ja) * 2009-01-21 2010-08-05 Nippon Densan Corp バスバーユニット、バスバーユニットの製造方法及びモータ
JP2010226907A (ja) * 2009-03-25 2010-10-07 Mitsuba Corp ブラシレスモータ
JP2014143897A (ja) * 2012-12-28 2014-08-07 Mitsuba Corp 電動モータおよび電動ポンプ
JP2016226177A (ja) * 2015-05-29 2016-12-28 日本電産株式会社 モータ

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5421369U (fr) * 1977-07-15 1979-02-10
JPH1118353A (ja) * 1997-06-27 1999-01-22 Jidosha Denki Kogyo Co Ltd 小型モータ
JP2010172086A (ja) * 2009-01-21 2010-08-05 Nippon Densan Corp バスバーユニット、バスバーユニットの製造方法及びモータ
JP2010226907A (ja) * 2009-03-25 2010-10-07 Mitsuba Corp ブラシレスモータ
JP2014143897A (ja) * 2012-12-28 2014-08-07 Mitsuba Corp 電動モータおよび電動ポンプ
JP2016226177A (ja) * 2015-05-29 2016-12-28 日本電産株式会社 モータ

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