WO2019026419A1 - Motor - Google Patents

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Publication number
WO2019026419A1
WO2019026419A1 PCT/JP2018/021939 JP2018021939W WO2019026419A1 WO 2019026419 A1 WO2019026419 A1 WO 2019026419A1 JP 2018021939 W JP2018021939 W JP 2018021939W WO 2019026419 A1 WO2019026419 A1 WO 2019026419A1
Authority
WO
WIPO (PCT)
Prior art keywords
side wall
bearing holder
wall portion
bearing
magnet
Prior art date
Application number
PCT/JP2018/021939
Other languages
French (fr)
Japanese (ja)
Inventor
貴裕 木津
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
Priority to CN201890001028.9U priority Critical patent/CN211830415U/en
Publication of WO2019026419A1 publication Critical patent/WO2019026419A1/en

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Classifications

    • 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
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
    • 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
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings

Definitions

  • the present invention relates to a motor.
  • Patent Document 1 discloses a structure in which a back yoke is attached to a bracket that holds a bearing, thereby blocking magnetic noise generated from other than the sensor magnet and enhancing position detection accuracy.
  • Patent Document 1 In the structure described in Patent Document 1, there is a problem that the manufacturing cost is increased because the number of parts is increased to provide the back yoke and the manufacturing process is complicated accordingly.
  • one aspect of the present invention aims to provide a motor with reduced manufacturing cost while suppressing magnetic noise from affecting the sensor.
  • a rotor having a shaft disposed along a central axis extending in the vertical direction, the rotor rotating around the central axis, and a stator opposed to the rotor in a radial direction with a gap.
  • the bearing holder is formed of a magnetic material, and the bearing holder encloses a part of the shaft from the radially outer side, and a first side wall extending to an upper side than the magnet fixing portion, and the radially outer side of the first side wall And a first flat portion extending along a plane perpendicular to the central axis and located below the upper end portion of the first side wall portion.
  • a motor with reduced manufacturing cost while suppressing magnetic noise from affecting the sensor.
  • FIG. 1 is a cross-sectional view of the motor of the embodiment.
  • FIG. 2 is a partial cross-sectional view showing a bearing holder of Modification Example 1.
  • FIG. 3 is a partial cross-sectional view showing a bearing holder of Modification 2.
  • FIG. 4 is a partial cross-sectional view showing a bearing holder of Modification 3.
  • FIG. 5 is a cross-sectional view of a motor of Modification 4.
  • FIG. 6 is a cross-sectional view of a motor of Modification 5.
  • an XYZ coordinate system is shown as a three-dimensional orthogonal coordinate system as appropriate.
  • the Z-axis direction is a direction parallel to the axial direction of the central axis J shown in FIG.
  • the X-axis direction is a direction orthogonal to the Z-axis direction, which is the left-right direction in FIG.
  • the Y-axis direction is orthogonal to both the X-axis direction and the Z-axis direction.
  • the positive side in the Z-axis direction (+ Z side, one side) is referred to as “upper side”, and the negative side in the Z-axis direction ( ⁇ Z side, other side) as “lower side”.
  • the upper side and the lower side are names used merely for explanation, and do not limit the actual positional relationship or direction.
  • a direction (Z-axis direction) parallel to the central axis J is simply referred to as “axial direction”, and a radial direction centered on the central axis J is simply referred to as “radial direction”.
  • the circumferential direction centering around the center axis, that is, around the axis of the central axis J, is simply referred to as "circumferential direction”.
  • plane view means a state viewed from the axial direction.
  • FIG. 1 is a cross-sectional view of a motor 1 of the present embodiment.
  • the motor 1 includes a rotor 20 having a shaft 21, a stator 30, a motor housing (housing) 40, an upper bearing 6, a lower bearing 7, a bearing holder 10, a sensor magnet 29, and a circuit board. And 50.
  • the rotor 20 rotates around the central axis J.
  • the rotor 20 has a shaft 21, a rotor core 24, a rotor magnet 23, and a magnet mounting member 28.
  • the shaft 21 is disposed along the central axis J around a central axis J extending in the vertical direction (axial direction).
  • the shaft 21 is rotatably supported around the central axis J by the lower bearing 7 and the upper bearing 6.
  • the lower end 21 b of the shaft 21 protrudes to the outside of the motor housing 40 through the hole 48 c.
  • the lower end 21 b is connected to an external device which is an output target outside the motor housing 40.
  • the upper end 21 a of the shaft 21 means an area above the upper bearing 6 of the shaft 21, and the lower end 21 b of the shaft 21 is lower than the lower bearing 7 of the shaft 21. Means area.
  • a magnet fixing portion 22 is provided at the upper end portion 21 a of the shaft 21.
  • a sensor magnet 29 is attached to the magnet fixing portion 22.
  • the magnet fixing portion 22 includes a fixing hole 21 c provided on an end face of the upper end portion 21 a of the shaft 21 and a rod-like magnet mounting member 28.
  • the magnet mounting member 28 is fitted into the fixing hole 21c.
  • the structure of the magnet fixing part 22 is not limited to this embodiment.
  • the magnet fixing portion may have a yoke-type holding member 28A shown by a phantom line (two-dot chain line) in FIG.
  • the holding member 28A has a first cylindrical portion 28Aa, a second cylindrical portion 28Ab, and a connection portion 28Ac.
  • the second cylindrical portion 28Ab is fitted to the outer peripheral surface of the shaft 21 at the upper end 21a of the shaft 21.
  • the first cylindrical portion 28Aa fits the outer peripheral surface of the sensor magnet on the upper side of the second cylindrical portion 28Ab.
  • the connection portion 28Ac connects the first cylindrical portion 28Aa and the second cylindrical portion 28Ab.
  • the rotor core 24 is fixed to the shaft 21.
  • the rotor core 24 circumferentially surrounds the shaft 21.
  • the rotor magnet 23 is fixed to the rotor core 24. More specifically, the rotor magnet 23 is fixed to the outer surface along the circumferential direction of the rotor core 24. The rotor core 24 and the rotor magnet 23 rotate with the shaft 21.
  • the stator 30 faces the rotor 20 in the radial direction with a gap therebetween, and surrounds the radially outer side of the rotor 20.
  • the stator 30 has a stator core 31, an insulator 32, and a coil 33.
  • the insulator 32 is made of an insulating material.
  • the insulator 32 covers at least a part of the stator core 31.
  • the coil 33 is configured by winding a coil wire (not shown).
  • the coil wire is wound around the teeth portion of the stator core 31 via the insulator 32. The end of the coil wire is drawn upward.
  • the drawn coil wire is connected to, for example, a bus bar (not shown) located in the first accommodation area A1 between the stator core 31 and the bearing holder 10. Furthermore, a part of the bus bar passes through the bearing holder 10 and is connected to the circuit board 50.
  • a bus bar (not shown) located in the first accommodation area A1 between the stator core 31 and the bearing holder 10. Furthermore, a part of the bus bar passes through the bearing holder 10 and is connected to the circuit board 50.
  • the upper bearing 6 rotatably supports the upper end 21 a of the shaft 21.
  • the upper bearing 6 is located above the stator 30.
  • the upper bearing 6 is held by the bearing holder 10.
  • the lower bearing 7 rotatably supports the lower end 21 b of the shaft 21.
  • the lower bearing 7 is located below the stator 30.
  • the lower bearing 7 is held by the lower bearing holding portion 48 of the motor housing 40.
  • the upper bearing 6 and the lower bearing 7 are ball bearings.
  • the types of the upper bearing 6 and the lower bearing 7 are not particularly limited, and may be other types of bearings.
  • the sensor magnet 29 is attached to the magnet fixing portion 22 of the shaft 21.
  • the sensor magnet 29 is annular.
  • the sensor magnet may be polygonal and D-shaped in plan view.
  • the sensor magnet 29 is fitted on the outer peripheral surface of the magnet mounting member 28 of the magnet fixing portion 22.
  • the sensor magnet 29 rotates around the central axis J together with the shaft 21.
  • the shape and attachment structure of the sensor magnet 29 are not limited to this embodiment.
  • the sensor magnet 29 may be directly attached to the tip of the shaft 21 by an adhesive or the like.
  • the sensor magnet 29 may not necessarily be located at the upper end of the shaft 21 as long as the sensor magnet 29 is attached to the upper end 21 a above the upper bearing 6.
  • the circuit board 50 is located above the bearing holder 10 and the sensor magnet.
  • the circuit board 50 extends along a plane orthogonal to the central axis J.
  • a bus bar (not shown) connected to the stator 30 is connected to the circuit board 50.
  • the circuit board 50 supplies a current to the coil 33 of the stator 30 to control the rotation of the rotor 20.
  • the circuit board 50 includes a substrate body 52, a rotation sensor 51, and a plurality of electronic components 55.
  • the substrate body 52 is disposed orthogonal to the axial direction.
  • the substrate main body 52 has an upper surface 52b facing upward and a lower surface 52a facing downward.
  • the rotation sensor 51 is located on the lower surface 52 a of the substrate body 52.
  • the rotation sensor 51 is located directly above the sensor magnet 29. That is, on the circuit board 50, the rotation sensor 51 opposed to the sensor magnet 29 in the axial direction is mounted.
  • the plurality of electronic components 55 are mounted on the lower surface 52 a and the upper surface 52 b of the substrate body 52.
  • the electronic component 55 is a mounting element excluding the rotation sensor 51 among the mounting elements constituting the control circuit of the circuit board 50.
  • the electronic component 55 is an electrolytic capacitor, a choke coil or the like.
  • the rotation sensor 51 is mounted on the lower surface 52 a of the substrate main body 52 .
  • the rotation sensor 51 may be mounted on the upper surface 52 b of the substrate body 52. That is, the rotation sensor 51 may be axially opposed to the sensor magnet 29 via the substrate body 52.
  • Examples of the rotation sensor 51 include an MR sensor (magnetoresistive sensor) and a Hall sensor.
  • the motor housing 40 has a tubular shape that opens to the upper side (+ Z side).
  • Motor housing 40 houses rotor 20 and stator 30.
  • the motor housing 40 has a cylindrical portion 44, a flange portion 45, a bottom portion 43, and a lower bearing holding portion 48.
  • the cylindrical portion 44 surrounds the stator 30 from the radially outer side.
  • the cylindrical portion 44 is, for example, cylindrical.
  • the stator 30 is fixed to the inner side surface of the cylindrical portion 44.
  • the flange portion 45 is located at the upper end of the cylindrical portion 44 and extends radially outward.
  • the motor housing 40 is fixed to the bearing holder 10 at the flange portion 45 by the bolt 8 and the nut 9.
  • the bottom portion 43 is located at the lower end of the cylindrical portion 44. Bottom portion 43 is located below stator 30.
  • the motor housing 40 and the bearing holder 10 are fastened by the bolt 8 and the nut 9.
  • fixing of the motor housing 40 and the bearing holder 10 may adopt other mechanical fixing structures such as caulking and welding.
  • the lower bearing holding portion 48 is located at the center of the bottom portion 43 in plan view.
  • the lower bearing holder 48 holds the lower bearing 7.
  • the lower bearing holding portion 48 has a cylindrical portion 48 a extending in the axial direction centering on the central axis J, and a lower end protruding portion 48 b extending inward in the radial direction from the lower end of the cylindrical portion 48 a.
  • a hole 48 penetrating in the axial direction at the center of the lower end protrusion 48 b in plan view c is provided.
  • the bearing holder 10 is located on the upper side (+ Z side) of the stator 30.
  • the bearing holder 10 is fixed to the upper end portion of the cylindrical portion 44 of the motor housing 40.
  • the bearing holder 10 supports the upper bearing 6.
  • the planar view (XY plane) shape of the bearing holder 10 is, for example, a circular shape concentric with the central axis J.
  • the outer edge portion of the bearing holder 10 is fixed to the flange portion 45 of the motor housing 40 by the bolt 8 and the nut 9.
  • the bearing holder 10 is made of metal.
  • the bearing holder 10 is made of a magnetic material.
  • steel is illustrated.
  • the bearing holder 10 is formed by bending a plate-like member.
  • the bearing holder 10 is fitted with the upper bearing holding portion (bearing holding portion) 15, the first side wall portion 11, the second flat portion 17, the second side wall portion 12, and the first flat portion 16. It has joint part 19A and fixed part 19B.
  • the upper bearing holding portion 15, the first side wall portion 11, the second flat portion 17, the second side wall portion 12, the first flat portion 16, the fitting portion 19A and the fixing portion 19B are provided radially outward It is arranged in this order toward the head.
  • the upper bearing holder 15 holds the upper bearing 6.
  • the upper bearing holder 15 is located at the center of the bearing holder 10 in a plan view.
  • the upper bearing holding portion 15 has a cylindrical portion 15a extending in the axial direction centering on the central axis J, and an upper end protruding portion 15b extending inward in the radial direction from the upper end of the cylindrical portion 15a.
  • the upper end protrusion 15 b positions the upper bearing 6 in the vertical direction.
  • a hole 15c penetrating in the axial direction is provided at the center of the upper end protrusion 15b in plan view. The holes 15 c allow the shaft 21 to pass therethrough.
  • the first side wall portion 11 is located radially outward of the upper bearing holding portion 15.
  • the first side wall 11 extends upward from the lower end of the upper bearing holder 15.
  • the first side wall portion 11 and the cylindrical portion 15a of the upper bearing holding portion 15 face each other in the radial direction and contact each other. Therefore, the cylindrical portion 15 a of the upper bearing holding portion 15 is supported from the radially outer side from the first side wall portion 11.
  • a gap may be provided in the radial direction between the first side wall portion 11 and the cylindrical portion 15 a of the upper bearing holding portion 15.
  • the first side wall portion 11 extends in a tubular shape along the axial direction.
  • the first side wall portion 11 surrounds a portion (upper end portion 21 a) of the shaft 21 from the radially outer side.
  • the first side wall portion 11 extends above the magnet fixing portion 22 provided on the upper end portion 21 a of the shaft 21.
  • the upper end portion 11 a of the first side wall portion 11 is positioned above the upper end surface of the sensor magnet 29.
  • a magnet accommodation area A3 is formed on the radially inner side of the first side wall portion 11.
  • the sensor magnet 29 is accommodated in the magnet accommodation area A3. That is, the first side wall portion 11 surrounds the sensor magnet 29 from the outer side in the radial direction via a gap.
  • the first side wall portion 11 extends to the upper side of the magnet fixing portion 22 and surrounds the sensor magnet 29 from the radially outer side. Since the bearing holder 10 is made of a magnetic material, the first side wall 11 functions as a magnetic shield. Thereby, it can suppress that the magnetic noise from the exterior of magnet accommodation area
  • a part (first side wall 11) of the bearing holder 10 is used as a magnetic shield. Therefore, there is no need to provide a separate component for the magnetic shield, and the manufacturing cost can be reduced.
  • a gap is provided between the upper end portion 11 a of the first side wall portion 11 and the lower surface 52 a of the substrate main body 52.
  • the gap between the upper end portion 11a of the first side wall portion 11 and the lower surface 52a of the substrate body 52 is preferably 5 mm or less.
  • the upper end 11 a of the first side wall 11 may be in contact with the lower surface 52 a of the substrate body 52. In this case, it is preferable that the portion of the lower surface 52 a of the substrate main body 52 in contact with the bearing holder 10 be subjected to the insulation treatment.
  • the second flat portion 17 extends radially outward from the upper end portion 11 a of the first side wall portion 11.
  • the second flat portion 17 extends radially inward from an upper end portion 12 a of a second side wall portion 12 described later. That is, the second flat portion 17 connects the upper end portion 11 a of the first side wall portion 11 and the upper end portion 12 a of the second side wall portion 12.
  • the second flat portion 17 extends along a plane orthogonal to the central axis J.
  • the second flat portion 17 is disposed with a gap of 5 mm or less with respect to the lower surface 52 a of the substrate main body 52.
  • the first accommodation area A1 is used as a space for arranging a coil wire extending upward from the coil 33 or arranging a bus bar to which the coil wire is connected.
  • the second flat portion 17 and the lower surface 52 a of the substrate body 52 may be in contact with each other.
  • the heat dissipation member G may be disposed in the gap between the second flat portion 17 and the lower surface 52 a of the substrate main body 52.
  • the circuit board 50 can be cooled by causing the bearing holder 10 to function as a heat sink.
  • the bearing holder 10 is made to function as a heat sink, it is preferable that the second flat portion 17 and the electronic component 55 be disposed so as to overlap with each other as viewed in the axial direction.
  • the electronic component 55 overlapping with the second flat portion 17 when viewed from the axial direction is a component that generates a large amount of heat.
  • the heat dissipation member G for example, insulating heat dissipation grease, a heat dissipation sheet, and the like are illustrated.
  • the second side wall 12 extends downward from the radially outer end of the second flat portion 17.
  • the second side wall 12 cylindrically extends along the axial direction.
  • the second side wall 12 surrounds the first side wall 11 from the radially outer side with a gap.
  • the upper end portion 11 a of the first side wall portion 11 and the upper end portion 12 a of the second side wall portion 12 are connected via the second flat portion 17.
  • a gap is provided between the first side wall 11 and the second side wall 12.
  • the first flat portion 16 extends radially outward from the lower end 12 b of the second side wall 12. That is, the first flat portion 16 is located radially outside the upper bearing holding portion 15, the first side wall portion 11, the second side wall portion 12, and the second flat portion 17.
  • the first flat portion 16 extends along a plane orthogonal to the central axis J.
  • the first flat portion 16 is located below the upper end portion 11 a of the first side wall portion 11. As described above, the upper end 12a of the first side wall 11 is disposed as close as possible to the substrate main body 52 in order to enhance the function as a magnetic field shield. According to the present embodiment, since the first flat portion 16 is positioned lower than the upper end portion 11 a of the first side wall portion 11, the gap between the first flat portion 16 and the substrate main body 52 is set to the first flat portion. The gap between the side wall portion 11 and the substrate body 52 can be made larger. Therefore, the second accommodation area A2 between the substrate main body 52 and the bearing holder 10 can be widely secured on the upper side of the first flat portion 16, and the electronic component 55 can be disposed in this area. .
  • the first flat portion 16 is located above the upper bearing 6. Therefore, the first flat portion 16 widens the second accommodation area A2 on the upper side of the first flat portion 16 while widening the first accommodation area A1 on the lower side of the first flat portion 16. Can be secured.
  • the fitting portion 19A extends upward from the radial outer end of the first flat portion 16.
  • the fitting portion 19A cylindrically extends along the circumferential direction.
  • the fitting portion 19A is fitted to the inner circumferential surface of the cylindrical portion 44 of the motor housing 40.
  • the bearing holder 10 is radially positioned with respect to the motor housing 40.
  • the fixing portion 19B extends radially outward from the upper end portion of the fitting portion 19A.
  • the fixing portion 19B extends along a plane orthogonal to the central axis J.
  • the fixing portion 19 B extends along the flange portion 45 of the motor housing 40.
  • the fixing portion 19 B is fixed to the flange portion 45 by the bolt 8 and the nut 9.
  • the bearing holder 10 of the present embodiment is formed by bending a plate-like member. Further, according to the present embodiment, the first flat portion 16 is located below the upper end portion 11 a of the first side wall portion 11. Therefore, an axially extending portion (second side wall portion 12) is provided between the upper end portion 11a of the first side wall portion 11 and the first flat portion 16. As a result, the bearing holder 10 is stepped in the radial direction, and the rigidity of the bearing holder 10 is enhanced. Therefore, according to the present embodiment, when manufacturing by bending and forming the bearing holder 10, the rigidity of the bearing holder 10 can be enhanced to suppress damage and vibration of the bearing holder. This enables stable holding of the upper bearing 6 by the bearing holder 10.
  • the bearing holder 10 supports the upper bearing 6 from the upper side at the upper end protrusion 15 b of the upper bearing holder 15. Further, the motor housing 40 supports the lower bearing 7 from the lower side at the lower end projecting portion 48 b of the lower bearing holding portion 48. Therefore, the upper bearing 6 is supported from the upper side in the bearing holder 10. Also, the lower bearing 7 is supported from the lower side in the motor housing 40. According to this embodiment, since the upper bearing 6 and the lower bearing 7 are suppressed in the direction in which they approach each other, the rigidity of the entire motor 1 is enhanced.
  • FIG. 2 is a partial cross-sectional view showing a bearing holder 110 of Modified Example 1 that can be adopted in the above-described embodiment.
  • symbol is attached
  • the bearing holder 110 is composed of a magnetic material.
  • the bearing holder 110 is formed by bending a plate-like member.
  • the bearing holder 110 includes an upper bearing holding portion (bearing holding portion) 115, an offset portion 118, a first side wall portion 111, a second side wall portion 112, and a flat portion (first flat portion) 116.
  • the upper bearing holding portion 115, the offset portion 118, the first side wall portion 111, the second side wall portion 112, and the flat portion 116 are disposed in this order from the radially inner side to the outer side.
  • the upper bearing holder 115 holds the upper bearing 6.
  • the upper bearing holding portion 115 has a cylindrical portion 115 a extending in the axial direction centering on the central axis J, and a lower end protruding portion 115 b extending inward in the radial direction from the lower end of the cylindrical portion 115 a.
  • a hole 115c penetrating in the axial direction is provided at the center of the lower end protrusion 115b in plan view.
  • the offset portion 118 extends radially outward from the upper end portion of the cylindrical portion 115 a of the upper bearing holding portion 115.
  • the offset portion 118 connects the upper bearing holding portion 115 and the first side wall portion 111.
  • the offset portion 118 is provided to arrange the first side wall portion 111 radially outward of the upper bearing holding portion 115.
  • the first side wall 111 is located radially outward of the upper bearing holder 115.
  • the first side wall portion 111 extends upward from the radially outer end of the offset portion 118.
  • the first side wall portion 111 extends cylindrically along the axial direction.
  • the first side wall portion 111 surrounds a portion (upper end portion 21 a) of the shaft 21 from the radially outer side.
  • the first side wall portion 111 extends above the magnet fixing portion 22 provided on the upper end portion 21 a of the shaft 21.
  • a magnet accommodation area A3 is formed on the radially inner side of the first side wall portion 111.
  • the sensor magnet 29 is accommodated in the magnet accommodation area A3. That is, the first side wall portion 111 surrounds the sensor magnet 29 from the radially outer side via a gap.
  • the second side wall portion 112 extends in a tubular shape along the axial direction.
  • the second side wall portion 112 surrounds the first side wall portion 111 from the radially outer side.
  • the upper end 111 a of the first side wall 111 and the upper end 112 a of the second side wall 112 are directly connected.
  • the first side wall 111 and the second side wall 112 face each other in the radial direction and contact each other.
  • the flat portion 116 extends radially outward from the lower end portion 112 b of the second side wall portion 112. That is, the flat portion 116 is located radially outside the upper bearing holding portion 115, the first side wall portion 111, and the second side wall portion 112. The flat portion 116 extends along a plane orthogonal to the central axis J.
  • the first side wall portion 111 can function as a magnetic shield. Thereby, it can suppress that the magnetic noise from the exterior of magnet accommodation area
  • the first side wall portion 111 and the second side wall portion 112 face each other in the radial direction and contact each other.
  • the flat part 116 located in the outer side of the 1st side wall part 111 and the 2nd side wall part 112 is widely securable.
  • the second accommodation area A2 between the substrate main body 52 and the bearing holder 110 can be widely secured, and the electronic component 55 can be disposed in this area.
  • FIG. 3 is a partial cross-sectional view showing a bearing holder 210 of Modified Example 2 that can be adopted in the above-described embodiment.
  • symbol is attached
  • the bearing holder 210 is comprised of a magnetic material.
  • the bearing holder 210 is formed by bending a plate-like member.
  • the bearing holder 210 includes an upper bearing holding portion (bearing holding portion) 215, a first side wall portion 211, a second flat portion 217, a second side wall portion 212, and a first flat portion 216.
  • the upper bearing holding portion 215, the first side wall portion 211, the second flat portion 217, the second side wall portion 212, and the first flat portion 216 are arranged in this order from the radially inner side to the outer side.
  • the upper bearing holder 215 holds the upper bearing 6.
  • the upper bearing holding portion 215 has a cylindrical portion 215a extending in the axial direction centering on the central axis J, and a lower end protruding portion 215b extending inward in the radial direction from the lower end of the cylindrical portion 215a.
  • a hole 215c penetrating in the axial direction is provided at the center of the lower end protrusion 215b in plan view.
  • the first side wall portion 211 continuously extends upward from the cylindrical portion 215 a of the upper bearing holding portion 215. That is, the first side wall portion 211 extends upward from the upper bearing holding portion 215.
  • the cylindrical portion 215a of the upper bearing holding portion 215 and the first side wall portion 211 are provided as part of a continuous cylindrical body.
  • the region in contact with the outer ring of the upper bearing 6 is taken as the cylindrical portion 215a of the upper bearing holding portion 215, and the region above that is taken as the first side wall portion 211.
  • the first side wall portion 211 extends cylindrically along the axial direction.
  • a magnet accommodation area A3 is formed on the radially inner side of the first side wall portion 211.
  • the sensor magnet 29 is accommodated in the magnet accommodation area A3. That is, the first side wall portion 211 surrounds the sensor magnet 29 from the radially outer side via a gap.
  • the second flat portion 217 extends radially outward from the upper end portion 211 a of the first side wall portion 211.
  • the second flat portion 217 extends radially inward from an upper end 212 a of a second side wall 212 described later. That is, the second flat portion 217 connects the upper end portion 211 a of the first side wall portion 211 and the upper end portion 212 a of the second side wall portion 212.
  • the second flat portion 217 extends along a plane orthogonal to the central axis J.
  • the second side wall portion 212 extends downward from the radially outer end of the second flat portion 217.
  • the second side wall portion 212 cylindrically extends along the axial direction.
  • the second side wall portion 212 surrounds the first side wall portion 211 from the radially outer side with a gap.
  • the upper end portion 211 a of the first side wall portion 211 and the upper end portion 212 a of the second side wall portion 212 are connected via the second flat portion 217.
  • the first flat portion 216 extends radially outward from the lower end 212 b of the second side wall 212. That is, the first flat portion 216 is located radially outward of the upper bearing holding portion 215, the first side wall portion 211, the second flat portion 217, and the second side wall portion 212. The first flat portion 216 extends along a plane orthogonal to the central axis J.
  • the first side wall portion 211 can be functioned as a magnetic shield as in the above-described embodiment. Thereby, it can suppress that the magnetic noise from the exterior of magnet accommodation area
  • in the bearing holder 210 there is not provided a location in contact in the radial direction. Therefore, when the bearing holder 210 is formed by bending the plate-like member, not only the precision of each part of the bearing holder 210 can be enhanced, but also the manufacturing cost can be reduced.
  • FIG. 4 is a partial cross-sectional view showing a bearing holder 310 of Modification 3 that can be adopted in the above-described embodiment.
  • symbol is attached
  • the bearing holder 310 is made of a magnetic material.
  • the bearing holder 310 is formed by bending a plate-like member.
  • the bearing holder 310 has an upper bearing holding portion (bearing holding portion) 315, a first side wall portion 311, a second side wall portion 312, and a flat portion (first flat portion) 316.
  • the upper bearing holding portion 315, the first side wall portion 311, the second side wall portion 312, and the flat portion 316 are disposed in this order from the radially inner side to the outer side.
  • the upper bearing holder 315 holds the upper bearing 6.
  • the upper bearing holding portion 315 has a cylindrical portion 315a extending in the axial direction centering on the central axis J, and a lower end protruding portion 315b extending inward in the radial direction from the lower end of the cylindrical portion 315a.
  • a hole 315 c penetrating in the axial direction is provided at the center of the lower end protrusion 315 b in plan view.
  • the first side wall portion 311 extends upward continuously from the cylindrical portion 315 a of the upper bearing holding portion 315. That is, the first side wall 311 extends upward from the upper bearing holder 315.
  • the first side wall portion 311 cylindrically extends along the axial direction.
  • a magnet accommodation area A3 is formed on the radially inner side of the first side wall portion 311.
  • the sensor magnet 29 is accommodated in the magnet accommodation area A3. That is, the first side wall portion 311 surrounds the sensor magnet 29 from the outer side in the radial direction via a gap.
  • the second side wall portion 312 cylindrically extends along the axial direction.
  • the second side wall 312 surrounds the first side wall 311 from the radially outer side.
  • the upper end portion 311a of the first side wall portion 311 and the upper end portion 312a of the second side wall portion 312 are directly connected.
  • the second side wall portion 312 radially faces and contacts the first side wall portion 311 and the cylindrical portion 315 a of the upper bearing holding portion 315.
  • the flat portion 316 extends radially outward from the lower end portion 312 b of the second side wall portion 312. That is, the flat portion 316 is located radially outward of the first side wall portion 311 and the second side wall portion 312.
  • the flat portion 316 extends along a plane orthogonal to the central axis J.
  • the flat portion 316 axially overlaps the upper bearing 6. Thereby, the second accommodation area A2 between the flat portion 316 and the substrate main body 52 can be widely secured, and the electronic component 55 can be disposed in this area.
  • the first side wall 311 can function as a magnetic shield. Thereby, it can suppress that the magnetic noise from the exterior of magnet accommodation area
  • FIG. 5 is a cross-sectional view showing a motor 401 of Modification 4 that can be adopted in the embodiment described above.
  • the motor 401 of this modification has a single first bearing holder (bearing holder) 410 for supporting the upper bearing 6 and a motor housing (housing) 440 as compared with the motor 1 of the above-described embodiment. It mainly differs in that it is configured as a member.
  • symbol is attached
  • the motor 401 includes a rotor 20 having a shaft 21, a stator 30, a motor housing (housing) 440, a first bearing holder 410, a second bearing holder 460, an upper bearing (bearing) 6, and a lower side.
  • the bearing 7, the sensor magnet 29, and the circuit board 50 are provided.
  • Motor housing 440 houses rotor 20 and stator 30.
  • the motor housing 440 has a cylindrical portion 444 and a flange portion 445.
  • the cylindrical portion 444 surrounds the stator 30 from the radially outer side.
  • the stator 30 is fixed to the inner side surface of the cylindrical portion 444.
  • the flange portion 445 is located at the lower end of the cylindrical portion 444 and extends radially outward.
  • the motor housing 440 is fixed to the second bearing holder 460 at the flange portion 445 by the bolt 408 and the nut 409.
  • the first bearing holder 410 is located at the upper end of the cylindrical portion 444.
  • the first bearing holder 410 covers the upper opening of the cylindrical portion 444.
  • the first bearing holder 410 is a single member with the motor housing 440.
  • the first bearing holder 410 and the motor housing 440 are made of magnetic material.
  • the first bearing holder 410 has an upper bearing holding portion (bearing holding portion) 415, a first side wall portion 411, a second flat portion 417, a second And a first flat portion 416.
  • the upper bearing holder 415 holds the upper bearing 6.
  • the first side wall 411 extends upward from the lower end of the cylindrical portion 415 a of the upper bearing holder 415.
  • the second flat portion 417 extends radially outward from the upper end 411 a of the first side wall 411.
  • the second side wall portion 412 extends downward from the radially outer end of the second flat portion 417.
  • the first flat portion 416 extends radially outward from the lower end portion 412 b of the second side wall portion 412. The radially outer end of the first flat portion 416 is connected to the upper end of the cylindrical portion 444.
  • the first side wall 411 surrounds the sensor magnet 29 from the radially outer side with a gap.
  • the first side wall 411 functions as a magnetic shield. Therefore, the influence of external magnetic noise on the detection result of the rotation sensor 51 can be suppressed. Further, the magnetic field generated by the sensor magnet 29 can be prevented from affecting the electronic component 55.
  • the second bearing holder 460 is located at the lower end of the cylindrical portion 444.
  • the second bearing holder 460 covers the lower opening of the cylindrical portion 444.
  • the second bearing holder 460 is a separate member from the motor housing 440.
  • the second bearing holder 460 includes a fixing portion 461, an upper detour portion 465, a lower detour portion 466, a flat plate portion 463, and a lower bearing holding portion 468.
  • the lower bearing holder 468 holds the lower bearing 7.
  • the lower bearing holding portion 468 is located at the center of the flat portion 463 in plan view.
  • the flat portion 463 extends radially outward from the lower bearing holding portion 468.
  • the lower detour 466 is located radially outward of the flat portion 463.
  • the lower bypassing portion 466 bypasses downward as it goes from the radially inner side to the outer side and extends upward again.
  • An external system (not shown) is connected to the lower side of the motor 1.
  • the external system is engaged with a transmission shaft (not shown) connected to the lower end portion of the shaft 21 to transmit power from the motor 1 and the inner peripheral surface of the lower detour 466 to position the transmission shaft on the shaft 21 And a positioning unit (not shown). That is, by providing the lower detour 466 in the second bearing holder 460, radial positioning with the external system becomes easy.
  • the upper detour 465 is located radially outward of the lower detour 466.
  • the upper detour 465 bypasses upward as it goes from the radially inner side to the outer side and extends downward again.
  • the upper detour 465 has a fitting portion 465 a extending along the tubular portion 444.
  • the fitting portion 465 a is fitted to the inner circumferential surface of the cylindrical portion 444.
  • the second bearing holder 460 is positioned in the radial direction with respect to the cylindrical portion 444.
  • the fixing portion 461 extends radially outward from the lower end portion of the upper detour portion 465.
  • the fixing portion 461 extends along a plane orthogonal to the central axis J.
  • the fixing portion 461 extends along the flange portion 445.
  • the fixing portion 461 is fixed to the flange portion 445 by a bolt 408 and a nut 409.
  • the fixing portion 461 may be fixed not only to the flange portion 445 but also to the external system.
  • FIG. 6 is a cross-sectional view of a motor 501 of Modification 5 that can be adopted in the above-described embodiment.
  • symbol is attached
  • the bearing holder 510 is comprised of a magnetic material.
  • the bearing holder 510 is formed by bending a plate-like member.
  • the bearing holder 510 includes an upper bearing holding portion (bearing holding portion) 515, an offset portion 518, a first side wall portion 511, a second flat portion 517, a second side wall portion 512, and a first flat surface. It has a portion 516, a fitting portion 519A, and a fixing portion 519B. Upper bearing holding portion 515, offset portion 518, first side wall portion 511, second flat portion 517, second side wall portion 512, first flat portion 516, fitting portion 519A and fixing portion 519B have diameters Direction is arranged in this order from the inside to the outside.
  • the upper bearing holder 515 holds the upper bearing 6.
  • the offset portion 518 extends radially outward from the lower end of the upper bearing holder 515.
  • the first side wall portion 511 extends upward from the radially outer end of the offset portion 518.
  • the second flat portion 517 extends radially outward from the upper end portion of the first side wall portion 511.
  • the second side wall portion 512 extends downward from the radially outer end of the second flat portion 517.
  • the first flat portion 516 extends radially outward from the lower end portion of the second side wall portion 512.
  • the fitting portion 519A has an inner cylindrical portion 519Aa extending downward from the radial outer end of the first flat portion 516 and an outer cylindrical portion 519Ab extending upward from the lower end of the inner cylindrical portion 519Aa. That is, the fitting portion 519A is formed to detour downward and return upward.
  • the inner cylindrical portion 519Aa and the outer cylindrical portion 519Ab cylindrically extend along the circumferential direction.
  • the fitting portion 519A is fitted to the inner peripheral surface of the cylindrical portion 44 of the motor housing 40. Thereby, the bearing holder 510 is radially positioned with respect to the motor housing 40.
  • the inner cylindrical portion 519Aa and the outer cylindrical portion 519Ab of the fitting portion 519A face each other in the radial direction and contact each other. Therefore, the rigidity of the fitting portion 519A can be enhanced, and the stability of the fixing between the bearing holder 510 and the motor housing 40 can be enhanced.
  • the fixing portion 519B extends radially outward from the radially outer and upper ends from the fitting portion 519A.
  • the axial position of the fixing portion 519 B substantially coincides with the axial position of the first flat portion 516.
  • the fixing portion 519 B extends along the flange portion 45 of the motor housing 40.
  • the fixing portion 519 B is fixed to the flange portion 45 by the bolt 8 and the nut 9.
  • the motor which has a circuit board was explained.
  • the circuit board may be configured separately from the motor. That is, the circuit board may be disposed on the upper side of the motor by connecting the motor to a separately prepared control unit.
  • the sensor magnet may be configured separately from the motor.
  • the motor illustrated the case where it has one circuit board.
  • the motor may have a plurality of circuit boards stacked in the vertical direction.
  • the first side wall extends linearly along the axial direction.
  • the first side wall portion may be curved along the axial direction as long as it is configured to surround a part of the shaft 21 from the radially outer side and extend to the upper side of the magnet fixing portion 22. It is also good.
  • the first side wall portion may be bent so as to bypass radially outward in the middle of extending upward.

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Abstract

This motor is provided with: a rotor which has a shaft arranged along a central axis extending in the vertical direction and rotates around the central axis; a stator radially facing the rotor with a gap therebetween; a bearing which rotatably supports an upper end section of the shaft; and a bearing holder which supports the bearing. A magnet fixing part to which a sensor magnet is mounted is provided on the upper end section of the shaft, and the bearing holder is configured from a magnetic material. The bearing holder has: a first side wall section which surrounds a portion of the shaft from the outside in the radial direction and extends higher than the magnet fixing part; and a first flat section which, on the outside of the first side wall section in the radial direction, extends along a plane perpendicular to the central axis, and is positioned lower than the upper end portion of the first side wall section.

Description

モータmotor
本発明は、モータに関する。 The present invention relates to a motor.
センサマグネットとセンサを用いてロータの位置検出を行う機電一体型のモータが知られている。特許文献１には、ベアリングを保持するブラケットにバックヨークを取り付けることで、センサマグネット以外から発生する磁気的なノイズを遮断して位置検出精度を高めた構造が開示されている。 There is known an electromechanical integrated motor that detects the position of a rotor using a sensor magnet and a sensor. Patent Document 1 discloses a structure in which a back yoke is attached to a bracket that holds a bearing, thereby blocking magnetic noise generated from other than the sensor magnet and enhancing position detection accuracy.
特開２００６－１５８０５９号公報JP, 2006-158059, A
特許文献１に記載の構造においては、バックヨークを設けるため部品点数が増加し、それに伴い製造工程も複雑化するため、製造コストが高くなるという問題があった。　 In the structure described in Patent Document 1, there is a problem that the manufacturing cost is increased because the number of parts is increased to provide the back yoke and the manufacturing process is complicated accordingly.
本発明の一つの態様は、上記問題点に鑑みて、磁気的なノイズがセンサに影響を与えることを抑制しつつ製造コストを低減したモータの提供を目的の一つとする。 SUMMARY OF THE INVENTION In view of the above problems, one aspect of the present invention aims to provide a motor with reduced manufacturing cost while suppressing magnetic noise from affecting the sensor.
本発明のモータの一つの態様は、上下方向に延びる中心軸に沿って配置されたシャフトを有し前記中心軸周りに回転するロータと、前記ロータと径方向に隙間を介して対向するステータと、前記シャフトの上端部を回転可能に支持するベアリングと、前記ベアリングを支持するベアリングホルダと、を備え、前記シャフトの上端部には、センサマグネットが取り付けられるマグネット固定部が設けられ、前記ベアリングホルダは、磁性材料から構成され、前記ベアリングホルダは、前記シャフトの一部を径方向外側から囲み前記マグネット固定部より上側まで延びる第１の側壁部と、前記第１の側壁部の径方向外側において前記中心軸と直交する平面に沿って延び前記第１の側壁部の上端部より下側に位置する第１の平坦部と、を有する。 According to one aspect of the motor of the present invention, there is provided a rotor having a shaft disposed along a central axis extending in the vertical direction, the rotor rotating around the central axis, and a stator opposed to the rotor in a radial direction with a gap. A bearing for rotatably supporting the upper end of the shaft; and a bearing holder for supporting the bearing, wherein the upper end of the shaft is provided with a magnet fixing portion to which a sensor magnet is attached; The bearing holder is formed of a magnetic material, and the bearing holder encloses a part of the shaft from the radially outer side, and a first side wall extending to an upper side than the magnet fixing portion, and the radially outer side of the first side wall And a first flat portion extending along a plane perpendicular to the central axis and located below the upper end portion of the first side wall portion.
本発明の一つの態様によれば、磁気的なノイズがセンサに影響を与えることを抑制しつつ製造コストを低減したモータが提供される。 According to one aspect of the present invention, there is provided a motor with reduced manufacturing cost while suppressing magnetic noise from affecting the sensor.
図１は、実施形態のモータの断面図である。FIG. 1 is a cross-sectional view of the motor of the embodiment. 図２は、変形例１のベアリングホルダを示す部分断面図である。FIG. 2 is a partial cross-sectional view showing a bearing holder of Modification Example 1. 図３は、変形例２のベアリングホルダを示す部分断面図である。FIG. 3 is a partial cross-sectional view showing a bearing holder of Modification 2. 図４は、変形例３のベアリングホルダを示す部分断面図である。FIG. 4 is a partial cross-sectional view showing a bearing holder of Modification 3. 図５は、変形例４のモータの断面図である。FIG. 5 is a cross-sectional view of a motor of Modification 4. 図６は、変形例５のモータの断面図である。FIG. 6 is a cross-sectional view of a motor of Modification 5.
以下、図面を参照しながら、本発明の実施形態に係るモータについて説明する。なお、本発明の範囲は、以下の実施の形態に限定されず、本発明の技術的思想の範囲内で任意に変更可能である。また、以下の図面においては、各構成をわかりやすくするために、実際の構造と各構造における縮尺や数等を異ならせる場合がある。　 Hereinafter, a motor according to an embodiment of the present invention will be described with reference to the drawings. The scope of the present invention is not limited to the following embodiments, and can be arbitrarily changed within the scope of the technical idea of the present invention. Moreover, in the following drawings, in order to make each structure intelligible, a scale, the number, etc. in an actual structure and each structure may be varied.
また、図面においては、適宜３次元直交座標系としてＸＹＺ座標系を示す。ＸＹＺ座標系において、Ｚ軸方向は、図１に示す中心軸Ｊの軸方向と平行な方向とする。Ｘ軸方向は、Ｚ軸方向と直交する方向であって図１の左右方向とする。Ｙ軸方向は、Ｘ軸方向とＺ軸方向との両方と直交する方向とする。　 In the drawings, an XYZ coordinate system is shown as a three-dimensional orthogonal coordinate system as appropriate. In the XYZ coordinate system, the Z-axis direction is a direction parallel to the axial direction of the central axis J shown in FIG. The X-axis direction is a direction orthogonal to the Z-axis direction, which is the left-right direction in FIG. The Y-axis direction is orthogonal to both the X-axis direction and the Z-axis direction.
また、以下の説明においては、Ｚ軸方向の正の側（＋Ｚ側，一方側）を「上側」と呼び、Ｚ軸方向の負の側（－Ｚ側，他方側）を「下側」と呼ぶ。なお、上側および下側とは、単に説明のために用いられる名称であって、実際の位置関係や方向を限定しない。また、特に断りのない限り、中心軸Ｊに平行な方向（Ｚ軸方向）を単に「軸方向」と呼び、中心軸Ｊを中心とする径方向を単に「径方向」と呼び、中心軸Ｊを中心とする周方向、すなわち、中心軸Ｊの軸周りを単に「周方向」と呼ぶ。さらに、以下の説明において、「平面視」とは、軸方向から見た状態を意味する。　 In the following description, the positive side in the Z-axis direction (+ Z side, one side) is referred to as “upper side”, and the negative side in the Z-axis direction (−Z side, other side) as “lower side”. Call. Note that the upper side and the lower side are names used merely for explanation, and do not limit the actual positional relationship or direction. Further, unless otherwise noted, a direction (Z-axis direction) parallel to the central axis J is simply referred to as “axial direction”, and a radial direction centered on the central axis J is simply referred to as “radial direction”. The circumferential direction centering around the center axis, that is, around the axis of the central axis J, is simply referred to as "circumferential direction". Furthermore, in the following description, “plan view” means a state viewed from the axial direction.
［モータ］　図１は、本実施形態のモータ１の断面図である。　モータ１は、シャフト２１を有するロータ２０と、ステータ３０と、モータハウジング（ハウジング）４０と、上側ベアリング（ベアリング）６と、下側ベアリング７と、ベアリングホルダ１０と、センサマグネット２９と、回路基板５０と、を備える。　 [Motor] FIG. 1 is a cross-sectional view of a motor 1 of the present embodiment. The motor 1 includes a rotor 20 having a shaft 21, a stator 30, a motor housing (housing) 40, an upper bearing 6, a lower bearing 7, a bearing holder 10, a sensor magnet 29, and a circuit board. And 50.
［ロータ］　ロータ２０は、中心軸Ｊ周りに回転する。ロータ２０は、シャフト２１と、ロータコア２４と、ロータマグネット２３と、マグネット取付部材２８と、を有する。　 Rotor The rotor 20 rotates around the central axis J. The rotor 20 has a shaft 21, a rotor core 24, a rotor magnet 23, and a magnet mounting member 28.
シャフト２１は、上下方向（軸方向）に延びる中心軸Ｊを中心として、中心軸Ｊに沿って配置される。シャフト２１は、下側ベアリング７と上側ベアリング６とによって、中心軸Ｊの軸周りに回転可能に支持される。シャフト２１の下端部２１ｂは、孔部４８ｃを介してモータハウジング４０の外部に突出する。下端部２１ｂは、モータハウジング４０の外部において出力対象である外部機器に接続される。　なお、本明細書において、シャフト２１の上端部２１ａとは、シャフト２１の上側ベアリング６より上側の領域を意味し、シャフト２１の下端部２１ｂとは、シャフト２１の下側ベアリング７より下側の領域を意味する。　 The shaft 21 is disposed along the central axis J around a central axis J extending in the vertical direction (axial direction). The shaft 21 is rotatably supported around the central axis J by the lower bearing 7 and the upper bearing 6. The lower end 21 b of the shaft 21 protrudes to the outside of the motor housing 40 through the hole 48 c. The lower end 21 b is connected to an external device which is an output target outside the motor housing 40. In the present specification, the upper end 21 a of the shaft 21 means an area above the upper bearing 6 of the shaft 21, and the lower end 21 b of the shaft 21 is lower than the lower bearing 7 of the shaft 21. Means area.
シャフト２１の上端部２１ａには、マグネット固定部２２が設けられる。マグネット固定部２２には、センサマグネット２９が取り付けられる。マグネット固定部２２は、シャフト２１の上端部２１ａの端面に設けられた固定穴２１ｃと、棒状のマグネット取付部材２８とから構成される。マグネット取付部材２８は、固定穴２１ｃに嵌め合わされる。なお、マグネット固定部２２の構成は、本実施形態に限定されない。例えば、マグネット固定部は、図１に仮想線（二点鎖線）で示すヨーク型の保持部材２８Ａを有していてもよい。保持部材２８Ａは、第１筒部２８Ａａと第２筒部２８Ａｂと接続部２８Ａｃとを有する。第２筒部２８Ａｂは、シャフト２１の上端部２１ａにおいてシャフト２１の外周面に嵌る。第１筒部２８Ａaは、第２筒部２８Ａｂの上側においてセンサマグネットの外周面を嵌める。接続部２８Ａｃは、第１筒部２８Ａａと第２筒部２８Ａｂとを繋ぐ。　 A magnet fixing portion 22 is provided at the upper end portion 21 a of the shaft 21. A sensor magnet 29 is attached to the magnet fixing portion 22. The magnet fixing portion 22 includes a fixing hole 21 c provided on an end face of the upper end portion 21 a of the shaft 21 and a rod-like magnet mounting member 28. The magnet mounting member 28 is fitted into the fixing hole 21c. In addition, the structure of the magnet fixing part 22 is not limited to this embodiment. For example, the magnet fixing portion may have a yoke-type holding member 28A shown by a phantom line (two-dot chain line) in FIG. The holding member 28A has a first cylindrical portion 28Aa, a second cylindrical portion 28Ab, and a connection portion 28Ac. The second cylindrical portion 28Ab is fitted to the outer peripheral surface of the shaft 21 at the upper end 21a of the shaft 21. The first cylindrical portion 28Aa fits the outer peripheral surface of the sensor magnet on the upper side of the second cylindrical portion 28Ab. The connection portion 28Ac connects the first cylindrical portion 28Aa and the second cylindrical portion 28Ab.
ロータコア２４は、シャフト２１に固定される。ロータコア２４は、シャフト２１を周方向に囲んでいる。ロータマグネット２３は、ロータコア２４に固定される。より詳細には、ロータマグネット２３は、ロータコア２４の周方向に沿った外側面に固定される。ロータコア２４およびロータマグネット２３は、シャフト２１とともに回転する。　 The rotor core 24 is fixed to the shaft 21. The rotor core 24 circumferentially surrounds the shaft 21. The rotor magnet 23 is fixed to the rotor core 24. More specifically, the rotor magnet 23 is fixed to the outer surface along the circumferential direction of the rotor core 24. The rotor core 24 and the rotor magnet 23 rotate with the shaft 21.
［ステータ］　ステータ３０は、ロータ２０と径方向に隙間を介して対向してロータ２０の径方向外側を囲む。ステータ３０は、ステータコア３１と、インシュレータ３２と、コイル３３と、を有する。インシュレータ３２は、絶縁性を有する材料から構成される。インシュレータ３２は、ステータコア３１の少なくとも一部を覆う。モータ１の駆動時において、コイル３３は、ステータコア３１を励磁する。コイル３３は、コイル線（図示略）が巻き回されて構成される。コイル線は、インシュレータ３２を介してステータコア３１のティース部に巻き回される。コイル線の端部は、上側に引き出される。引き出されたコイル線は、例えば、ステータコア３１とベアリングホルダ１０との間の第１の収容領域Ａ１に位置するバスバー（図示略）に接続される。さらに、バスバーの一部が、ベアリングホルダ１０を貫通して、回路基板５０に接続される。　 [Stator] The stator 30 faces the rotor 20 in the radial direction with a gap therebetween, and surrounds the radially outer side of the rotor 20. The stator 30 has a stator core 31, an insulator 32, and a coil 33. The insulator 32 is made of an insulating material. The insulator 32 covers at least a part of the stator core 31. When the motor 1 is driven, the coil 33 excites the stator core 31. The coil 33 is configured by winding a coil wire (not shown). The coil wire is wound around the teeth portion of the stator core 31 via the insulator 32. The end of the coil wire is drawn upward. The drawn coil wire is connected to, for example, a bus bar (not shown) located in the first accommodation area A1 between the stator core 31 and the bearing holder 10. Furthermore, a part of the bus bar passes through the bearing holder 10 and is connected to the circuit board 50.
［上側ベアリングおよび下側ベアリング］　上側ベアリング６は、シャフト２１の上端部２１ａを回転可能に支持する。上側ベアリング６は、ステータ３０の上側に位置する。上側ベアリング６は、ベアリングホルダ１０に保持される。　下側ベアリング７は、シャフト２１の下端部２１ｂを回転可能に支持する。下側ベアリング７は、ステータ３０の下側に位置する。下側ベアリング７は、モータハウジング４０の下側ベアリング保持部４８に保持される。　 Upper Bearing and Lower Bearing The upper bearing 6 rotatably supports the upper end 21 a of the shaft 21. The upper bearing 6 is located above the stator 30. The upper bearing 6 is held by the bearing holder 10. The lower bearing 7 rotatably supports the lower end 21 b of the shaft 21. The lower bearing 7 is located below the stator 30. The lower bearing 7 is held by the lower bearing holding portion 48 of the motor housing 40.
本実施形態において、上側ベアリング６および下側ベアリング７は、ボールベアリングである。しかしながら、上側ベアリング６および下側ベアリング７の種類は、特に限定されず、他の種類のベアリングであってもよい。　 In the present embodiment, the upper bearing 6 and the lower bearing 7 are ball bearings. However, the types of the upper bearing 6 and the lower bearing 7 are not particularly limited, and may be other types of bearings.
［センサマグネット］　センサマグネット２９は、シャフト２１のマグネット固定部２２に取り付けられる。本実施形態において、センサマグネット２９は、円環状である。しかしながら、センサマグネットは、平面視で多角形状およびＤ型形状であってもよい。センサマグネット２９は、マグネット固定部２２のマグネット取付部材２８の外周面に嵌め合わされる。センサマグネット２９は、シャフト２１とともに中心軸Ｊを中心として回転する。なお、センサマグネット２９の形状および取付構造は本実施形態に限定されない。例えば、センサマグネット２９は、接着剤などによりシャフト２１の先端に直接取り付けられてもよい。また、センサマグネット２９は、上側ベアリング６より上側の上端部２１ａに取り付けられていれば必ずしもシャフト２１の上端に位置していなくてもよい。　 [Sensor Magnet] The sensor magnet 29 is attached to the magnet fixing portion 22 of the shaft 21. In the present embodiment, the sensor magnet 29 is annular. However, the sensor magnet may be polygonal and D-shaped in plan view. The sensor magnet 29 is fitted on the outer peripheral surface of the magnet mounting member 28 of the magnet fixing portion 22. The sensor magnet 29 rotates around the central axis J together with the shaft 21. In addition, the shape and attachment structure of the sensor magnet 29 are not limited to this embodiment. For example, the sensor magnet 29 may be directly attached to the tip of the shaft 21 by an adhesive or the like. The sensor magnet 29 may not necessarily be located at the upper end of the shaft 21 as long as the sensor magnet 29 is attached to the upper end 21 a above the upper bearing 6.
［回路基板］　回路基板５０は、ベアリングホルダ１０およびセンサマグネットの上側に位置する。回路基板５０は、中心軸Ｊと直交する平面に沿って延びる。回路基板５０には、ステータ３０に接続されたバスバー（図示略）が接続される。回路基板５０は、ステータ３０のコイル３３に電流を流してロータ２０の回転を制御する。　 [Circuit Board] The circuit board 50 is located above the bearing holder 10 and the sensor magnet. The circuit board 50 extends along a plane orthogonal to the central axis J. A bus bar (not shown) connected to the stator 30 is connected to the circuit board 50. The circuit board 50 supplies a current to the coil 33 of the stator 30 to control the rotation of the rotor 20.
回路基板５０は、基板本体５２と、回転センサ５１と、複数の電子部品５５と、を有する。基板本体５２は、軸方向に直交して配置される。基板本体５２は、上側を向く上面５２ｂと、下側を向く下面５２ａと、を有する。回転センサ５１は、基板本体５２の下面５２ａに位置する。回転センサ５１は、センサマグネット２９の直上に位置する。すなわち、回路基板５０には、センサマグネット２９と軸方向に対向する回転センサ５１が実装される。複数の電子部品５５は、基板本体５２の下面５２ａおよび上面５２ｂに実装される。電子部品５５は、回路基板５０の制御回路を構成する実装素子のうち回転センサ５１を除く実装素子である。電子部品５５は、電解コンデンサ、チョークコイル等である。　 The circuit board 50 includes a substrate body 52, a rotation sensor 51, and a plurality of electronic components 55. The substrate body 52 is disposed orthogonal to the axial direction. The substrate main body 52 has an upper surface 52b facing upward and a lower surface 52a facing downward. The rotation sensor 51 is located on the lower surface 52 a of the substrate body 52. The rotation sensor 51 is located directly above the sensor magnet 29. That is, on the circuit board 50, the rotation sensor 51 opposed to the sensor magnet 29 in the axial direction is mounted. The plurality of electronic components 55 are mounted on the lower surface 52 a and the upper surface 52 b of the substrate body 52. The electronic component 55 is a mounting element excluding the rotation sensor 51 among the mounting elements constituting the control circuit of the circuit board 50. The electronic component 55 is an electrolytic capacitor, a choke coil or the like.
なお、本実施形態において、回転センサ５１が基板本体５２の下面５２ａに実装される場合を例示した。しかしながら、回転センサ５１は、基板本体５２の上面５２ｂに実装されていてもよい。すなわち、回転センサ５１は、基板本体５２を介して、センサマグネット２９と軸方向に対向していてもよい。回転センサ５１としては、例えば、ＭＲセンサ（磁気抵抗センサ）およびホールセンサなどが挙げられる。　 In the present embodiment, the case where the rotation sensor 51 is mounted on the lower surface 52 a of the substrate main body 52 is illustrated. However, the rotation sensor 51 may be mounted on the upper surface 52 b of the substrate body 52. That is, the rotation sensor 51 may be axially opposed to the sensor magnet 29 via the substrate body 52. Examples of the rotation sensor 51 include an MR sensor (magnetoresistive sensor) and a Hall sensor.
［モータハウジング（ハウジング）］　モータハウジング４０は、上側（＋Ｚ側）に開口する筒状である。モータハウジング４０は、ロータ２０およびステータ３０を収容する。モータハウジング４０は、筒状部４４と、フランジ部４５と、底部４３と、下側ベアリング保持部４８と、を有する。　 [Motor Housing (Housing)] The motor housing 40 has a tubular shape that opens to the upper side (+ Z side). Motor housing 40 houses rotor 20 and stator 30. The motor housing 40 has a cylindrical portion 44, a flange portion 45, a bottom portion 43, and a lower bearing holding portion 48.
筒状部４４は、ステータ３０を径方向外側から囲む。本実施形態において筒状部４４は、例えば、円筒状である。筒状部４４の内側面には、ステータ３０が固定される。フランジ部４５は、筒状部４４の上端に位置し径方向外側に延びる。モータハウジング４０は、フランジ部４５において、ボルト８およびナット９によりベアリングホルダ１０に固定される。底部４３は、筒状部４４の下端に位置する。底部４３は、ステータ３０の下側に位置する。　なお、本実施形態において、モータハウジング４０とベアリングホルダ１０とは、ボルト８およびナット９によって締結されている。しかしながら、モータハウジング４０とベアリングホルダ１０との固定は、カシメおよび溶接などのその他の機械的な固定構造を採用してもよい。　 The cylindrical portion 44 surrounds the stator 30 from the radially outer side. In the present embodiment, the cylindrical portion 44 is, for example, cylindrical. The stator 30 is fixed to the inner side surface of the cylindrical portion 44. The flange portion 45 is located at the upper end of the cylindrical portion 44 and extends radially outward. The motor housing 40 is fixed to the bearing holder 10 at the flange portion 45 by the bolt 8 and the nut 9. The bottom portion 43 is located at the lower end of the cylindrical portion 44. Bottom portion 43 is located below stator 30. In the present embodiment, the motor housing 40 and the bearing holder 10 are fastened by the bolt 8 and the nut 9. However, fixing of the motor housing 40 and the bearing holder 10 may adopt other mechanical fixing structures such as caulking and welding.
下側ベアリング保持部４８は、底部４３の平面視中央に位置する。下側ベアリング保持部４８は、下側ベアリング７を保持する。下側ベアリング保持部４８は、中心軸Ｊを中心として軸方向に延びる筒部４８ａと、筒部４８ａの下端から径方向内側に延びる下端突出部４８ｂと、を有する。下端突出部４８ｂの平面視中央には、軸方向に貫通する孔部４８
ｃが設けられる。　 The lower bearing holding portion 48 is located at the center of the bottom portion 43 in plan view. The lower bearing holder 48 holds the lower bearing 7. The lower bearing holding portion 48 has a cylindrical portion 48 a extending in the axial direction centering on the central axis J, and a lower end protruding portion 48 b extending inward in the radial direction from the lower end of the cylindrical portion 48 a. A hole 48 penetrating in the axial direction at the center of the lower end protrusion 48 b in plan view
c is provided.
［ベアリングホルダ］　ベアリングホルダ１０は、ステータ３０の上側（＋Ｚ側）に位置する。ベアリングホルダ１０は、モータハウジング４０の筒状部４４の上端部に固定される。ベアリングホルダ１０は、上側ベアリング６を支持する。ベアリングホルダ１０の平面視（ＸＹ面視）形状は、例えば、中心軸Ｊと同心の円形状である。ベアリングホルダ１０の外縁部は、ボルト８およびナット９によってモータハウジング４０のフランジ部４５に固定される。　 [Bearing Holder] The bearing holder 10 is located on the upper side (+ Z side) of the stator 30. The bearing holder 10 is fixed to the upper end portion of the cylindrical portion 44 of the motor housing 40. The bearing holder 10 supports the upper bearing 6. The planar view (XY plane) shape of the bearing holder 10 is, for example, a circular shape concentric with the central axis J. The outer edge portion of the bearing holder 10 is fixed to the flange portion 45 of the motor housing 40 by the bolt 8 and the nut 9.
ベアリングホルダ１０は、金属製である。ベアリングホルダ１０は、磁性材料から構成される。ベアリングホルダ１０を構成する材料としては、鋼が例示される。ベアリングホルダ１０は、板状部材を折り曲げ加工することで成形される。　 The bearing holder 10 is made of metal. The bearing holder 10 is made of a magnetic material. As a material which comprises the bearing holder 10, steel is illustrated. The bearing holder 10 is formed by bending a plate-like member.
ベアリングホルダ１０は、上側ベアリング保持部（ベアリング保持部）１５と、第１の側壁部１１と、第２の平坦部１７と、第２の側壁部１２と、第１の平坦部１６と、嵌合部１９Ａと、固定部１９Ｂと、を有する。上側ベアリング保持部１５、第１の側壁部１１、第２の平坦部１７、第２の側壁部１２、第１の平坦部１６、嵌合部１９Ａおよび固定部１９Ｂは、径方向内側から外側に向かってこの順で配置される。　 The bearing holder 10 is fitted with the upper bearing holding portion (bearing holding portion) 15, the first side wall portion 11, the second flat portion 17, the second side wall portion 12, and the first flat portion 16. It has joint part 19A and fixed part 19B. The upper bearing holding portion 15, the first side wall portion 11, the second flat portion 17, the second side wall portion 12, the first flat portion 16, the fitting portion 19A and the fixing portion 19B are provided radially outward It is arranged in this order toward the head.
上側ベアリング保持部１５は、上側ベアリング６を保持する。上側ベアリング保持部１５は、ベアリングホルダ１０の平面視中央に位置する。上側ベアリング保持部１５は、中心軸Ｊを中心として軸方向に延びる筒部１５ａと、筒部１５ａの上端から径方向内側に延びる上端突出部１５ｂと、を有する。上端突出部１５ｂは、上側ベアリング６を上下方向に位置決めする。上端突出部１５ｂの平面視中央には、軸方向に貫通する孔部１５ｃが設けられる。孔部１５ｃは、内側にシャフト２１を通過させる。　 The upper bearing holder 15 holds the upper bearing 6. The upper bearing holder 15 is located at the center of the bearing holder 10 in a plan view. The upper bearing holding portion 15 has a cylindrical portion 15a extending in the axial direction centering on the central axis J, and an upper end protruding portion 15b extending inward in the radial direction from the upper end of the cylindrical portion 15a. The upper end protrusion 15 b positions the upper bearing 6 in the vertical direction. A hole 15c penetrating in the axial direction is provided at the center of the upper end protrusion 15b in plan view. The holes 15 c allow the shaft 21 to pass therethrough.
第１の側壁部１１は、上側ベアリング保持部１５の径方向外側に位置する。第１の側壁部１１は、上側ベアリング保持部１５の下端部から上側に延びる。第１の側壁部１１と上側ベアリング保持部１５の筒部１５ａとは、径方向に対向して互いに接触する。したがって、上側ベアリング保持部１５の筒部１５ａは、径方向外側から第１の側壁部１１から支持される。結果として、上側ベアリング保持部１５の剛性が高まり、上側ベアリング保持部１５の振動が抑制され上側ベアリング６の回転安定性を高めることができる。　なお、第１の側壁部１１と上側ベアリング保持部１５の筒部１５ａとは、径方向に隙間が設けられていてもよい。　 The first side wall portion 11 is located radially outward of the upper bearing holding portion 15. The first side wall 11 extends upward from the lower end of the upper bearing holder 15. The first side wall portion 11 and the cylindrical portion 15a of the upper bearing holding portion 15 face each other in the radial direction and contact each other. Therefore, the cylindrical portion 15 a of the upper bearing holding portion 15 is supported from the radially outer side from the first side wall portion 11. As a result, the rigidity of the upper bearing holding portion 15 is enhanced, the vibration of the upper bearing holding portion 15 is suppressed, and the rotational stability of the upper bearing 6 can be enhanced. A gap may be provided in the radial direction between the first side wall portion 11 and the cylindrical portion 15 a of the upper bearing holding portion 15.
第１の側壁部１１は、軸方向に沿って筒状に延びる。第１の側壁部１１は、シャフト２１の一部（上端部２１ａ）を径方向外側から囲む。第１の側壁部１１は、シャフト２１の上端部２１ａに設けられたマグネット固定部２２より上側まで延びる。また、第１の側壁部１１の上端部１１ａは、センサマグネット２９の上端面より上側に位置する。第１の側壁部１１の径方向内側には、マグネット収容領域Ａ３が構成される。マグネット収容領域Ａ３には、センサマグネット２９が収容される。すなわち、第１の側壁部１１は、センサマグネット２９を径方向外側から隙間を介して囲む。　 The first side wall portion 11 extends in a tubular shape along the axial direction. The first side wall portion 11 surrounds a portion (upper end portion 21 a) of the shaft 21 from the radially outer side. The first side wall portion 11 extends above the magnet fixing portion 22 provided on the upper end portion 21 a of the shaft 21. Further, the upper end portion 11 a of the first side wall portion 11 is positioned above the upper end surface of the sensor magnet 29. A magnet accommodation area A3 is formed on the radially inner side of the first side wall portion 11. The sensor magnet 29 is accommodated in the magnet accommodation area A3. That is, the first side wall portion 11 surrounds the sensor magnet 29 from the outer side in the radial direction via a gap.
本実施形態によれば、第１の側壁部１１がマグネット固定部２２より上側まで延びてセンサマグネット２９を径方向外側から囲む。ベアリングホルダ１０は、磁性材料で構成されるため、第１の側壁部１１は、磁気シールドとして機能する。これにより、マグネット収容領域Ａ３の外部からの磁気的なノイズが、回転センサ５１の検知結果に影響を及ぼすことを抑制できる。また、センサマグネット２９により生じる磁場が、マグネット収容領域Ａ３の外部の電子部品５５に影響を及ぼすことを抑制できる。結果として信頼性の高いモータ１を構成することができる。　 According to the present embodiment, the first side wall portion 11 extends to the upper side of the magnet fixing portion 22 and surrounds the sensor magnet 29 from the radially outer side. Since the bearing holder 10 is made of a magnetic material, the first side wall 11 functions as a magnetic shield. Thereby, it can suppress that the magnetic noise from the exterior of magnet accommodation area | region A3 influences the detection result of the rotation sensor 51. FIG. Moreover, it can suppress that the magnetic field which generate | occur | produces with the sensor magnet 29 exerts influence on the electronic component 55 of the exterior of magnet accommodation area | region A3. As a result, a highly reliable motor 1 can be configured.
また、本実施形態によれば、ベアリングホルダ１０の一部（第１の側壁部１１）を磁気シールドとして利用する。このため、磁気シールドのための別途部品を設ける必要がなく、製造コストの低減を図ることができる。　 Further, according to the present embodiment, a part (first side wall 11) of the bearing holder 10 is used as a magnetic shield. Therefore, there is no need to provide a separate component for the magnetic shield, and the manufacturing cost can be reduced.
本実施形態において、第１の側壁部１１の上端部１１ａと基板本体５２の下面５２ａとの間には、隙間が設けられる。第１の側壁部１１の上端部１１ａと基板本体５２の下面５２ａとの隙間は、５ｍｍ以下とすることが好ましい。これにより、上端部１１ａの軸方向位置をセンサマグネット２９の軸方向位置に近づけて、センサマグネット２９に磁気的なノイズの影響が及ぶことを効果的に抑制できる。　なお、第１の側壁部１１の上端部１１ａと基板本体５２の下面５２ａとが接触していてもよい。この場合は、基板本体５２の下面５２ａのうち、ベアリングホルダ１０に接触する部分に絶縁処理が施されていることが好ましい。　 In the present embodiment, a gap is provided between the upper end portion 11 a of the first side wall portion 11 and the lower surface 52 a of the substrate main body 52. The gap between the upper end portion 11a of the first side wall portion 11 and the lower surface 52a of the substrate body 52 is preferably 5 mm or less. As a result, the axial position of the upper end portion 11a can be brought close to the axial position of the sensor magnet 29, and the influence of magnetic noise on the sensor magnet 29 can be effectively suppressed. The upper end 11 a of the first side wall 11 may be in contact with the lower surface 52 a of the substrate body 52. In this case, it is preferable that the portion of the lower surface 52 a of the substrate main body 52 in contact with the bearing holder 10 be subjected to the insulation treatment.
第２の平坦部１７は、第１の側壁部１１の上端部１１ａから径方向外側に延びる。また、第２の平坦部１７は、後述する第２の側壁部１２の上端部１２ａから径方向内側に延びる。すなわち、第２の平坦部１７は、第１の側壁部１１の上端部１１ａと第２の側壁部１２の上端部１２ａとを接続する。第２の平坦部１７は、中心軸Ｊと直交する平面に沿って延びる。　 The second flat portion 17 extends radially outward from the upper end portion 11 a of the first side wall portion 11. The second flat portion 17 extends radially inward from an upper end portion 12 a of a second side wall portion 12 described later. That is, the second flat portion 17 connects the upper end portion 11 a of the first side wall portion 11 and the upper end portion 12 a of the second side wall portion 12. The second flat portion 17 extends along a plane orthogonal to the central axis J.
第２の平坦部１７は、第１の側壁部１１の上端部１１ａと同様に、基板本体５２の下面５２ａに対し５ｍｍ以下の隙間を介して配置される。第２の平坦部１７が設けられることで、第２の平坦部１７の下側においてベアリングホルダ１０とステータ３０との間の第１の収容領域Ａ１を広く確保することができる。第１の収容領域Ａ１は、コイル３３から上側に延びるコイル線を取り回す、又は、コイル線が接続されるバスバーを配置するスペースとして利用される。第１の収容領域Ａ１を広く確保することで、コイル線の取り回し、又は、バスバーの配置の自由度を高めることができる。　 Similar to the upper end portion 11 a of the first side wall portion 11, the second flat portion 17 is disposed with a gap of 5 mm or less with respect to the lower surface 52 a of the substrate main body 52. By providing the second flat portion 17, the first accommodation area A <b> 1 between the bearing holder 10 and the stator 30 can be widely secured below the second flat portion 17. The first accommodation area A1 is used as a space for arranging a coil wire extending upward from the coil 33 or arranging a bus bar to which the coil wire is connected. By securing the first accommodation area A1 widely, the degree of freedom of the arrangement of the coil wires or the arrangement of the bus bars can be increased.
第２の平坦部１７と基板本体５２の下面５２ａとは接触していてもよい。また、図１に二点鎖線で示す様に、第２の平坦部１７と基板本体５２の下面５２ａとの間の隙間に、放熱部材Ｇを配置してもよい。この場合には、ベアリングホルダ１０をヒートシンクとして機能させて、回路基板５０を冷却することができる。ベアリングホルダ１０をヒートシンクとして機能させる場合、軸方向から見て、第２の平坦部１７と電子部品５５が重なる様に配置されることが好ましい。この場合、軸方向から見て第２の平坦部１７と重なる電子部品５５は、発熱量の大きな部品とされる。　なお、放熱部材Ｇとしては、例えば絶縁性の放熱グリスや放熱シートなどが例示される。　 The second flat portion 17 and the lower surface 52 a of the substrate body 52 may be in contact with each other. In addition, as shown by a two-dot chain line in FIG. 1, the heat dissipation member G may be disposed in the gap between the second flat portion 17 and the lower surface 52 a of the substrate main body 52. In this case, the circuit board 50 can be cooled by causing the bearing holder 10 to function as a heat sink. When the bearing holder 10 is made to function as a heat sink, it is preferable that the second flat portion 17 and the electronic component 55 be disposed so as to overlap with each other as viewed in the axial direction. In this case, the electronic component 55 overlapping with the second flat portion 17 when viewed from the axial direction is a component that generates a large amount of heat. In addition, as the heat dissipation member G, for example, insulating heat dissipation grease, a heat dissipation sheet, and the like are illustrated.
第２の側壁部１２は、第２の平坦部１７の径方向外側端部から下側に向かって延びる。第２の側壁部１２は、軸方向に沿って筒状に延びる。第２の側壁部１２は、第１の側壁部１１を径方向外側から隙間を介して囲む。第１の側壁部１１の上端部１１ａと第２の側壁部１２の上端部１２ａとは、第２の平坦部１７を介して接続される。　本実施形態によれば、第１の側壁部１１と第２の側壁部１２との間に隙間が設けられている。これによって、第１の側壁部１１と第２の側壁部１２とが接触する場合と比較してベアリングホルダ１０の剛性を高めることができる。　 The second side wall 12 extends downward from the radially outer end of the second flat portion 17. The second side wall 12 cylindrically extends along the axial direction. The second side wall 12 surrounds the first side wall 11 from the radially outer side with a gap. The upper end portion 11 a of the first side wall portion 11 and the upper end portion 12 a of the second side wall portion 12 are connected via the second flat portion 17. According to the present embodiment, a gap is provided between the first side wall 11 and the second side wall 12. Thereby, the rigidity of the bearing holder 10 can be enhanced as compared with the case where the first side wall portion 11 and the second side wall portion 12 are in contact with each other.
第１の平坦部１６は、第２の側壁部１２の下端部１２ｂから径方向外側に延びる。すなわち、第１の平坦部１６は、上側ベアリング保持部１５、第１の側壁部１１、第２の側壁部１２および第２の平坦部１７の径方向外側に位置する。第１の平坦部１６は、中心軸Ｊと直交する平面に沿って延びる。　 The first flat portion 16 extends radially outward from the lower end 12 b of the second side wall 12. That is, the first flat portion 16 is located radially outside the upper bearing holding portion 15, the first side wall portion 11, the second side wall portion 12, and the second flat portion 17. The first flat portion 16 extends along a plane orthogonal to the central axis J.
第１の平坦部１６は、第１の側壁部１１の上端部１１ａより下側に位置する。上述したように、第１の側壁部１１の上端部１２ａは、磁場シールドとしての機能を高める為にできるだけ基板本体５２に近づけて配置される。本実施形態によれば、第１の平坦部１６が、第１の側壁部１１の上端部１１ａより下側に位置するため、第１の平坦部１６と基板本体５２との隙間を、第１の側壁部１１と基板本体５２との隙間より大きくすることができる。このため、第１の平坦部１６の上側において、基板本体５２とベアリングホルダ１０との間の第２の収容領域Ａ２を広く確保することができ、この領域に電子部品５５を配置させることができる。　 The first flat portion 16 is located below the upper end portion 11 a of the first side wall portion 11. As described above, the upper end 12a of the first side wall 11 is disposed as close as possible to the substrate main body 52 in order to enhance the function as a magnetic field shield. According to the present embodiment, since the first flat portion 16 is positioned lower than the upper end portion 11 a of the first side wall portion 11, the gap between the first flat portion 16 and the substrate main body 52 is set to the first flat portion. The gap between the side wall portion 11 and the substrate body 52 can be made larger. Therefore, the second accommodation area A2 between the substrate main body 52 and the bearing holder 10 can be widely secured on the upper side of the first flat portion 16, and the electronic component 55 can be disposed in this area. .
本実施形態において、第１の平坦部１６は、上側ベアリング６より上側に位置する。したがって、第１の平坦部１６は、第１の平坦部１６の下側の第１の収容領域Ａ１を広くしつつ、第１の平坦部１６の上側の第２の収容領域Ａ２を十分に広く確保できる。　 In the present embodiment, the first flat portion 16 is located above the upper bearing 6. Therefore, the first flat portion 16 widens the second accommodation area A2 on the upper side of the first flat portion 16 while widening the first accommodation area A1 on the lower side of the first flat portion 16. Can be secured.
嵌合部１９Ａは、第１の平坦部１６の径方向外側の端部から上側に延びる。嵌合部１９Ａは、周方向に沿って筒状に延びる。嵌合部１９Ａは、モータハウジング４０の筒状部４４の内周面に嵌合される。これにより、ベアリングホルダ１０は、モータハウジング４０に対して径方向に位置決めされる。　 The fitting portion 19A extends upward from the radial outer end of the first flat portion 16. The fitting portion 19A cylindrically extends along the circumferential direction. The fitting portion 19A is fitted to the inner circumferential surface of the cylindrical portion 44 of the motor housing 40. Thus, the bearing holder 10 is radially positioned with respect to the motor housing 40.
固定部１９Ｂは、嵌合部１９Ａの上端部から径方向外側に延びる。固定部１９Ｂは、中心軸Ｊと直交する平面に沿って延びる。固定部１９Ｂは、モータハウジング４０のフランジ部４５に沿って延びる。固定部１９Ｂは、ボルト８およびナット９によってフランジ部４５に固定される。　 The fixing portion 19B extends radially outward from the upper end portion of the fitting portion 19A. The fixing portion 19B extends along a plane orthogonal to the central axis J. The fixing portion 19 B extends along the flange portion 45 of the motor housing 40. The fixing portion 19 B is fixed to the flange portion 45 by the bolt 8 and the nut 9.
本実施形態のベアリングホルダ１０は、板状部材を折り曲げ加工することで成形される。また、本実施形態によれば、第１の平坦部１６が、第１の側壁部１１の上端部１１ａより下側に位置する。このため第１の側壁部１１の上端部１１ａと第１の平坦部１６との間に軸方向に延びる部分（第２の側壁部１２）が設けられる。これにより、ベアリングホルダ１０が径方向に沿って段差状となり、ベアリングホルダ１０が高剛性化される。したがって、本実施形態によれば、ベアリングホルダ１０を折り曲げ成形して製造する場合に、ベアリングホルダ１０の剛性を高めて、ベアリングホルダの損傷および振動を抑制できる。これにより、ベアリングホルダ１０による上側ベアリング６の安定的な保持が可能となる。　 The bearing holder 10 of the present embodiment is formed by bending a plate-like member. Further, according to the present embodiment, the first flat portion 16 is located below the upper end portion 11 a of the first side wall portion 11. Therefore, an axially extending portion (second side wall portion 12) is provided between the upper end portion 11a of the first side wall portion 11 and the first flat portion 16. As a result, the bearing holder 10 is stepped in the radial direction, and the rigidity of the bearing holder 10 is enhanced. Therefore, according to the present embodiment, when manufacturing by bending and forming the bearing holder 10, the rigidity of the bearing holder 10 can be enhanced to suppress damage and vibration of the bearing holder. This enables stable holding of the upper bearing 6 by the bearing holder 10.
本実施形態において、ベアリングホルダ１０は、上側ベアリング保持部１５の上端突出部１５ｂにおいて上側ベアリング６を上側から支持する。また、モータハウジング４０は、下側ベアリング保持部４８の下端突出部４８ｂにおいて下側ベアリング７を下側から支持する。したがって、上側ベアリング６は、ベアリングホルダ１０において上側から支持される。また、下側ベアリング７は、モータハウジング４０において下側から支持される。本実施形態によれば、上側ベアリング６および下側ベアリング７が互いに近接する方向に抑えられているため、モータ１全体の剛性が高められる。　 In the present embodiment, the bearing holder 10 supports the upper bearing 6 from the upper side at the upper end protrusion 15 b of the upper bearing holder 15. Further, the motor housing 40 supports the lower bearing 7 from the lower side at the lower end projecting portion 48 b of the lower bearing holding portion 48. Therefore, the upper bearing 6 is supported from the upper side in the bearing holder 10. Also, the lower bearing 7 is supported from the lower side in the motor housing 40. According to this embodiment, since the upper bearing 6 and the lower bearing 7 are suppressed in the direction in which they approach each other, the rigidity of the entire motor 1 is enhanced.
＜変形例１＞　図２に、上述の実施形態に採用可能な変形例１のベアリングホルダ１１０を示す部分断面図である。なお、上述の実施形態と同一態様の構成要素については、同一符号を付し、その説明を省略する。　 Modified Example 1 FIG. 2 is a partial cross-sectional view showing a bearing holder 110 of Modified Example 1 that can be adopted in the above-described embodiment. In addition, about the component of the aspect same as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
上述の実施形態と同様に、ベアリングホルダ１１０は、磁性材料から構成される。ベアリングホルダ１１０は、板状部材を折り曲げ加工することで成形される。　 Similar to the previous embodiments, the bearing holder 110 is composed of a magnetic material. The bearing holder 110 is formed by bending a plate-like member.
ベアリングホルダ１１０は、上側ベアリング保持部（ベアリング保持部）１１５と、オフセット部１１８と、第１の側壁部１１１と、第２の側壁部１１２と、平坦部（第１の平坦部）１１６と、を有する。上側ベアリング保持部１１５、オフセット部１１８、第１の側壁部１１１、第２の側壁部１１２および平坦部１１６は、径方向内側から外側に向かってこの順で配置される。　 The bearing holder 110 includes an upper bearing holding portion (bearing holding portion) 115, an offset portion 118, a first side wall portion 111, a second side wall portion 112, and a flat portion (first flat portion) 116. Have. The upper bearing holding portion 115, the offset portion 118, the first side wall portion 111, the second side wall portion 112, and the flat portion 116 are disposed in this order from the radially inner side to the outer side.
上側ベアリング保持部１１５は、上側ベアリング６を保持する。上側ベアリング保持部１１５は、中心軸Ｊを中心として軸方向に延びる筒部１１５ａと、筒部１１５ａの下端から径方向内側に延びる下端突出部１１５ｂと、を有する。下端突出部１１５ｂの平面視中央には、軸方向に貫通する孔部１１５ｃが設けられる。　 The upper bearing holder 115 holds the upper bearing 6. The upper bearing holding portion 115 has a cylindrical portion 115 a extending in the axial direction centering on the central axis J, and a lower end protruding portion 115 b extending inward in the radial direction from the lower end of the cylindrical portion 115 a. A hole 115c penetrating in the axial direction is provided at the center of the lower end protrusion 115b in plan view.
オフセット部１１８は、上側ベアリング保持部１１５の筒部１１５ａの上端部から径方向外側に延びる。オフセット部１１８は、上側ベアリング保持部１１５と第１の側壁部１１１とを繋ぐ。オフセット部１１８は、上側ベアリング保持部１１５に対して、第１の側壁部１１１を径方向外側に配置させるために設けられる。オフセッ
ト部１１８が設けられることで、第１の側壁部１１１と、センサマグネット２９との径方向の隙間が十分に確保される。これにより、第１の側壁部１１１とセンサマグネット２９との干渉が抑制される。　 The offset portion 118 extends radially outward from the upper end portion of the cylindrical portion 115 a of the upper bearing holding portion 115. The offset portion 118 connects the upper bearing holding portion 115 and the first side wall portion 111. The offset portion 118 is provided to arrange the first side wall portion 111 radially outward of the upper bearing holding portion 115. By providing the offset portion 118, a radial gap between the first side wall portion 111 and the sensor magnet 29 is sufficiently secured. Thereby, interference with the 1st side wall part 111 and sensor magnet 29 is controlled.
第１の側壁部１１１は、上側ベアリング保持部１１５の径方向外側に位置する。第１の側壁部１１１は、オフセット部１１８の径方向外側端部から上側に延びる。第１の側壁部１１１は、軸方向に沿って筒状に延びる。第１の側壁部１１１は、シャフト２１の一部（上端部２１ａ）を径方向外側から囲む。第１の側壁部１１１は、シャフト２１の上端部２１ａに設けられたマグネット固定部２２より上側まで延びる。第１の側壁部１１１の径方向内側には、マグネット収容領域Ａ３が構成される。マグネット収容領域Ａ３には、センサマグネット２９が収容される。すなわち、第１の側壁部１１１は、センサマグネット２９を径方向外側から隙間を介して囲む。　 The first side wall 111 is located radially outward of the upper bearing holder 115. The first side wall portion 111 extends upward from the radially outer end of the offset portion 118. The first side wall portion 111 extends cylindrically along the axial direction. The first side wall portion 111 surrounds a portion (upper end portion 21 a) of the shaft 21 from the radially outer side. The first side wall portion 111 extends above the magnet fixing portion 22 provided on the upper end portion 21 a of the shaft 21. A magnet accommodation area A3 is formed on the radially inner side of the first side wall portion 111. The sensor magnet 29 is accommodated in the magnet accommodation area A3. That is, the first side wall portion 111 surrounds the sensor magnet 29 from the radially outer side via a gap.
第２の側壁部１１２は、軸方向に沿って筒状に延びる。第２の側壁部１１２は、第１の側壁部１１１を径方向外側から囲む。第１の側壁部１１１の上端部１１１ａと第２の側壁部１１２の上端部１１２ａとは、直接的に接続される。第１の側壁部１１１と第２の側壁部１１２とは、径方向に対向して互いに接触する。　 The second side wall portion 112 extends in a tubular shape along the axial direction. The second side wall portion 112 surrounds the first side wall portion 111 from the radially outer side. The upper end 111 a of the first side wall 111 and the upper end 112 a of the second side wall 112 are directly connected. The first side wall 111 and the second side wall 112 face each other in the radial direction and contact each other.
平坦部１１６は、第２の側壁部１１２の下端部１１２ｂから径方向外側に延びる。すなわち、平坦部１１６は、上側ベアリング保持部１１５、第１の側壁部１１１および第２の側壁部１１２の径方向外側に位置する。平坦部１１６は、中心軸Ｊと直交する平面に沿って延びる。　 The flat portion 116 extends radially outward from the lower end portion 112 b of the second side wall portion 112. That is, the flat portion 116 is located radially outside the upper bearing holding portion 115, the first side wall portion 111, and the second side wall portion 112. The flat portion 116 extends along a plane orthogonal to the central axis J.
本変形例によれば、上述の実施形態と同様に、第１の側壁部１１１を磁気シールドとして機能させることができる。これにより、マグネット収容領域Ａ３の外部からの磁気的なノイズが、回転センサ５１の検知結果に影響を及ぼすことを抑制できる。また、センサマグネット２９により生じる磁場が、マグネット収容領域Ａ３の外部の電子部品５５に影響を及ぼすことを抑制できる。　 According to this modification, as in the above-described embodiment, the first side wall portion 111 can function as a magnetic shield. Thereby, it can suppress that the magnetic noise from the exterior of magnet accommodation area | region A3 influences the detection result of the rotation sensor 51. FIG. Moreover, it can suppress that the magnetic field which generate | occur | produces with the sensor magnet 29 exerts influence on the electronic component 55 of the exterior of magnet accommodation area | region A3.
本変形例によれば、第１の側壁部１１１と第２の側壁部１１２とが、径方向に対向して接触する。このため、第１の側壁部１１１および第２の側壁部１１２の外側に位置する平坦部１１６を広く確保することができる。結果として、平坦部１１６の上側において、基板本体５２とベアリングホルダ１１０との間の第２の収容領域Ａ２を広く確保することができ、この領域に電子部品５５を配置させることができる。　 According to the present modification, the first side wall portion 111 and the second side wall portion 112 face each other in the radial direction and contact each other. For this reason, the flat part 116 located in the outer side of the 1st side wall part 111 and the 2nd side wall part 112 is widely securable. As a result, on the upper side of the flat portion 116, the second accommodation area A2 between the substrate main body 52 and the bearing holder 110 can be widely secured, and the electronic component 55 can be disposed in this area.
＜変形例２＞　図３に、上述の実施形態に採用可能な変形例２のベアリングホルダ２１０を示す部分断面図である。なお、上述の実施形態と同一態様の構成要素については、同一符号を付し、その説明を省略する。　 Modified Example 2 FIG. 3 is a partial cross-sectional view showing a bearing holder 210 of Modified Example 2 that can be adopted in the above-described embodiment. In addition, about the component of the aspect same as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
上述の実施形態と同様に、ベアリングホルダ２１０は、磁性材料から構成される。ベアリングホルダ２１０は、板状部材を折り曲げ加工することで成形される。　 Similar to the previous embodiments, the bearing holder 210 is comprised of a magnetic material. The bearing holder 210 is formed by bending a plate-like member.
ベアリングホルダ２１０は、上側ベアリング保持部（ベアリング保持部）２１５と、第１の側壁部２１１と、第２の平坦部２１７と、第２の側壁部２１２と、第１の平坦部２１６と、を有する。上側ベアリング保持部２１５、第１の側壁部２１１、第２の平坦部２１７、第２の側壁部２１２および第１の平坦部２１６は、径方向内側から外側に向かってこの順で配置される。　 The bearing holder 210 includes an upper bearing holding portion (bearing holding portion) 215, a first side wall portion 211, a second flat portion 217, a second side wall portion 212, and a first flat portion 216. Have. The upper bearing holding portion 215, the first side wall portion 211, the second flat portion 217, the second side wall portion 212, and the first flat portion 216 are arranged in this order from the radially inner side to the outer side.
上側ベアリング保持部２１５は、上側ベアリング６を保持する。上側ベアリング保持部２１５は、中心軸Ｊを中心として軸方向に延びる筒部２１５ａと、筒部２１５ａの下端から径方向内側に延びる下端突出部２１５ｂと、を有する。下端突出部２１５ｂの平面視中央には、軸方向に貫通する孔部２１５ｃが設けられる。　 The upper bearing holder 215 holds the upper bearing 6. The upper bearing holding portion 215 has a cylindrical portion 215a extending in the axial direction centering on the central axis J, and a lower end protruding portion 215b extending inward in the radial direction from the lower end of the cylindrical portion 215a. A hole 215c penetrating in the axial direction is provided at the center of the lower end protrusion 215b in plan view.
第１の側壁部２１１は、上側ベアリング保持部２１５の筒部２１５ａから連続して上側に延びる。すなわち、第１の側壁部２１１は、上側ベアリング保持部２１５から上側に延びる。　なお、本変形例において、上側ベアリング保持部２１５の筒部２１５ａおよび第１の側壁部２１１は、連続する筒状体の一部として設けられている。ここでは、筒状体のうち、上側ベアリング６の外輪と接触する領域を上側ベアリング保持部２１５の筒部２１５ａとし、それより上側の領域を第１の側壁部２１１とする。　 The first side wall portion 211 continuously extends upward from the cylindrical portion 215 a of the upper bearing holding portion 215. That is, the first side wall portion 211 extends upward from the upper bearing holding portion 215. In the present modification, the cylindrical portion 215a of the upper bearing holding portion 215 and the first side wall portion 211 are provided as part of a continuous cylindrical body. Here, in the cylindrical body, the region in contact with the outer ring of the upper bearing 6 is taken as the cylindrical portion 215a of the upper bearing holding portion 215, and the region above that is taken as the first side wall portion 211.
第１の側壁部２１１は、軸方向に沿って筒状に延びる。第１の側壁部２１１の径方向内側には、マグネット収容領域Ａ３が構成される。マグネット収容領域Ａ３には、センサマグネット２９が収容される。すなわち、第１の側壁部２１１は、センサマグネット２９を径方向外側から隙間を介して囲む。　 The first side wall portion 211 extends cylindrically along the axial direction. A magnet accommodation area A3 is formed on the radially inner side of the first side wall portion 211. The sensor magnet 29 is accommodated in the magnet accommodation area A3. That is, the first side wall portion 211 surrounds the sensor magnet 29 from the radially outer side via a gap.
第２の平坦部２１７は、第１の側壁部２１１の上端部２１１ａから径方向外側に延びる。また、第２の平坦部２１７は、後述する第２の側壁部２１２の上端部２１２ａから径方向内側に延びる。すなわち、第２の平坦部２１７は、第１の側壁部２１１の上端部２１１ａと第２の側壁部２１２の上端部２１２ａとを接続する。第２の平坦部２１７は、中心軸Ｊと直交する平面に沿って延びる。　 The second flat portion 217 extends radially outward from the upper end portion 211 a of the first side wall portion 211. The second flat portion 217 extends radially inward from an upper end 212 a of a second side wall 212 described later. That is, the second flat portion 217 connects the upper end portion 211 a of the first side wall portion 211 and the upper end portion 212 a of the second side wall portion 212. The second flat portion 217 extends along a plane orthogonal to the central axis J.
第２の側壁部２１２は、第２の平坦部２１７の径方向外側端部から下側に向かって延びる。第２の側壁部２１２は、軸方向に沿って筒状に延びる。第２の側壁部２１２は、第１の側壁部２１１を径方向外側から隙間を介して囲む。第１の側壁部２１１の上端部２１１ａと第２の側壁部２１２の上端部２１２ａとは、第２の平坦部２１７を介して接続される。　 The second side wall portion 212 extends downward from the radially outer end of the second flat portion 217. The second side wall portion 212 cylindrically extends along the axial direction. The second side wall portion 212 surrounds the first side wall portion 211 from the radially outer side with a gap. The upper end portion 211 a of the first side wall portion 211 and the upper end portion 212 a of the second side wall portion 212 are connected via the second flat portion 217.
第１の平坦部２１６は、第２の側壁部２１２の下端部２１２ｂから径方向外側に延びる。すなわち、第１の平坦部２１６は、上側ベアリング保持部２１５、第１の側壁部２１１、第２の平坦部２１７および第２の側壁部２１２の径方向外側に位置する。第１の平坦部２１６は、中心軸Ｊと直交する平面に沿って延びる。　 The first flat portion 216 extends radially outward from the lower end 212 b of the second side wall 212. That is, the first flat portion 216 is located radially outward of the upper bearing holding portion 215, the first side wall portion 211, the second flat portion 217, and the second side wall portion 212. The first flat portion 216 extends along a plane orthogonal to the central axis J.
本変形例によれば、上述の実施形態と同様に、第１の側壁部２１１を磁気シールドとして機能させることができる。これにより、マグネット収容領域Ａ３の外部からの磁気的なノイズが、回転センサ５１の検知結果に影響を及ぼすことを抑制できる。また、センサマグネット２９により生じる磁場が、マグネット収容領域Ａ３の外部の電子部品５５に影響を及ぼすことを抑制できる。　本変形例によれば、ベアリングホルダ２１０において、径方向に接触する箇所が設けられていない。このため、板状部材を折り曲げ加工することでベアリングホルダ２１０を成形する場合、ベアリングホルダ２１０の各部の精度を高めることができるのみならず、製造コストを下げることができる。　 According to this modification, the first side wall portion 211 can be functioned as a magnetic shield as in the above-described embodiment. Thereby, it can suppress that the magnetic noise from the exterior of magnet accommodation area | region A3 influences the detection result of the rotation sensor 51. FIG. Moreover, it can suppress that the magnetic field which generate | occur | produces with the sensor magnet 29 exerts influence on the electronic component 55 of the exterior of magnet accommodation area | region A3. According to this modification, in the bearing holder 210, there is not provided a location in contact in the radial direction. Therefore, when the bearing holder 210 is formed by bending the plate-like member, not only the precision of each part of the bearing holder 210 can be enhanced, but also the manufacturing cost can be reduced.
＜変形例３＞　図４に、上述の実施形態に採用可能な変形例３のベアリングホルダ３１０を示す部分断面図である。なお、上述の実施形態と同一態様の構成要素については、同一符号を付し、その説明を省略する。　 <Modification 3> FIG. 4 is a partial cross-sectional view showing a bearing holder 310 of Modification 3 that can be adopted in the above-described embodiment. In addition, about the component of the aspect same as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
上述の実施形態と同様に、ベアリングホルダ３１０は、磁性材料から構成される。ベアリングホルダ３１０は、板状部材を折り曲げ加工することで成形される。　 Similar to the previous embodiments, the bearing holder 310 is made of a magnetic material. The bearing holder 310 is formed by bending a plate-like member.
ベアリングホルダ３１０は、上側ベアリング保持部（ベアリング保持部）３１５と、第１の側壁部３１１と、第２の側壁部３１２と、平坦部（第１の平坦部）３１６と、を有する。上側ベアリング保持部３１５、第１の側壁部３１１、第２の側壁部３１２および平坦部３１６は、径方向内側から外側に向かってこの順で配置される。　 The bearing holder 310 has an upper bearing holding portion (bearing holding portion) 315, a first side wall portion 311, a second side wall portion 312, and a flat portion (first flat portion) 316. The upper bearing holding portion 315, the first side wall portion 311, the second side wall portion 312, and the flat portion 316 are disposed in this order from the radially inner side to the outer side.
上側ベアリング保持部３１５は、上側ベアリング６を保持する。上側ベアリング保持部３１５は、中心軸Ｊを中心として軸方向に延びる筒部３１５ａと、筒部３１５ａの下端から径方向内側に延びる下端突出部３１５ｂと、を有する。下端突出部３１５ｂの平面視中央には、軸方向に貫通する孔部３１５ｃが設けられる。　 The upper bearing holder 315 holds the upper bearing 6. The upper bearing holding portion 315 has a cylindrical portion 315a extending in the axial direction centering on the central axis J, and a lower end protruding portion 315b extending inward in the radial direction from the lower end of the cylindrical portion 315a. A hole 315 c penetrating in the axial direction is provided at the center of the lower end protrusion 315 b in plan view.
第１の側壁部３１１は、上側ベアリング保持部３１５の筒部３１５ａから連続して上側に延びる。すなわち、第１の側壁部３１１は、上側ベアリング保持部３１５から上側に延びる。第１の側壁部３１１は、軸方向に沿って筒状に延びる。第１の側壁部３１１の径方向内側には、マグネット収容領域Ａ３が構成される。マグネット収容領域Ａ３には、センサマグネット２９が収容される。すなわち、第１の側壁部３１１は、センサマグネット２９を径方向外側から隙間を介して囲む。　 The first side wall portion 311 extends upward continuously from the cylindrical portion 315 a of the upper bearing holding portion 315. That is, the first side wall 311 extends upward from the upper bearing holder 315. The first side wall portion 311 cylindrically extends along the axial direction. A magnet accommodation area A3 is formed on the radially inner side of the first side wall portion 311. The sensor magnet 29 is accommodated in the magnet accommodation area A3. That is, the first side wall portion 311 surrounds the sensor magnet 29 from the outer side in the radial direction via a gap.
第２の側壁部３１２は、軸方向に沿って筒状に延びる。第２の側壁部３１２は、第１の側壁部３１１を径方向外側から囲む。第１の側壁部３１１の上端部３１１ａと第２の側壁部３１２の上端部３１２ａとは、直接的に接続される。第２の側壁部３１２は、第１の側壁部３１１および上側ベアリング保持部３１５の筒部３１５ａと径方向に対向して接触する。　 The second side wall portion 312 cylindrically extends along the axial direction. The second side wall 312 surrounds the first side wall 311 from the radially outer side. The upper end portion 311a of the first side wall portion 311 and the upper end portion 312a of the second side wall portion 312 are directly connected. The second side wall portion 312 radially faces and contacts the first side wall portion 311 and the cylindrical portion 315 a of the upper bearing holding portion 315.
平坦部３１６は、第２の側壁部３１２の下端部３１２ｂから径方向外側に延びる。すなわち、平坦部３１６は、第１の側壁部３１１および第２の側壁部３１２の径方向外側に位置する。平坦部３１６は、中心軸Ｊと直交する平面に沿って延びる。　 The flat portion 316 extends radially outward from the lower end portion 312 b of the second side wall portion 312. That is, the flat portion 316 is located radially outward of the first side wall portion 311 and the second side wall portion 312. The flat portion 316 extends along a plane orthogonal to the central axis J.
平坦部３１６は、軸方向において上側ベアリング６と重なる。これにより、平坦部３１６と基板本体５２との間の第２の収容領域Ａ２を広く確保することができ、この領域に電子部品５５を配置させることができる。　 The flat portion 316 axially overlaps the upper bearing 6. Thereby, the second accommodation area A2 between the flat portion 316 and the substrate main body 52 can be widely secured, and the electronic component 55 can be disposed in this area.
本変形例によれば、上述の実施形態と同様に、第１の側壁部３１１を磁気シールドとして機能させることができる。これにより、マグネット収容領域Ａ３の外部からの磁気的なノイズが、回転センサ５１の検知結果に影響を及ぼすことを抑制できる。また、センサマグネット２９により生じる磁場が、マグネット収容領域Ａ３の外部の電子部品５５に影響を及ぼすことを抑制できる。　 According to this modification, as in the above-described embodiment, the first side wall 311 can function as a magnetic shield. Thereby, it can suppress that the magnetic noise from the exterior of magnet accommodation area | region A3 influences the detection result of the rotation sensor 51. FIG. Moreover, it can suppress that the magnetic field which generate | occur | produces with the sensor magnet 29 exerts influence on the electronic component 55 of the exterior of magnet accommodation area | region A3.
＜変形例４＞　図５に、上述の実施形態に採用可能な変形例４のモータ４０１を示す断面図である。　本変形例のモータ４０１は、上述の実施形態のモータ１と比較して、上側ベアリング６を支持する第１のベアリングホルダ（ベアリングホルダ）４１０と、モータハウジング（ハウジング）４４０と、が単一の部材として構成されている点が主に異なる。なお、上述の実施形態と同一態様の構成要素については、同一符号を付し、その説明を省略する。　 <Modification 4> FIG. 5 is a cross-sectional view showing a motor 401 of Modification 4 that can be adopted in the embodiment described above. The motor 401 of this modification has a single first bearing holder (bearing holder) 410 for supporting the upper bearing 6 and a motor housing (housing) 440 as compared with the motor 1 of the above-described embodiment. It mainly differs in that it is configured as a member. In addition, about the component of the aspect same as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
モータ４０１は、シャフト２１を有するロータ２０と、ステータ３０と、モータハウジング（ハウジング）４４０と、第１のベアリングホルダ４１０と、第２のベアリングホルダ４６０と、上側ベアリング（ベアリング）６と、下側ベアリング７と、センサマグネット２９と、回路基板５０と、を備える。　 The motor 401 includes a rotor 20 having a shaft 21, a stator 30, a motor housing (housing) 440, a first bearing holder 410, a second bearing holder 460, an upper bearing (bearing) 6, and a lower side. The bearing 7, the sensor magnet 29, and the circuit board 50 are provided.
モータハウジング４４０は、ロータ２０およびステータ３０を収容する。モータハウジング４４０は、筒状部４４４と、フランジ部４４５と、を有する。筒状部４４４は、ステータ３０を径方向外側から囲む。筒状部４４４の内側面には、ステータ３０が固定される。フランジ部４４５は、筒状部４４４の下端に位置し径方向外側に延びる。モータハウジング４４０は、フランジ部４４５において、ボルト４０８およびナット４０９により第２のベアリングホルダ４６０と固定される。　 Motor housing 440 houses rotor 20 and stator 30. The motor housing 440 has a cylindrical portion 444 and a flange portion 445. The cylindrical portion 444 surrounds the stator 30 from the radially outer side. The stator 30 is fixed to the inner side surface of the cylindrical portion 444. The flange portion 445 is located at the lower end of the cylindrical portion 444 and extends radially outward. The motor housing 440 is fixed to the second bearing holder 460 at the flange portion 445 by the bolt 408 and the nut 409.
第１のベアリングホルダ４１０は、筒状部４４４の上端部に位置する。第１のベアリングホルダ４１０は、筒状部４４４の上側の開口を覆う。第１のベアリングホルダ４１０は、モータハウジング４４０と単一の部材である。第１のベアリングホルダ４１０およびモータハウジング４４０は、磁性材料から構成される。　 The first bearing holder 410 is located at the upper end of the cylindrical portion 444. The first bearing holder 410 covers the upper opening of the cylindrical portion 444. The first bearing holder 410 is a single member with the motor housing 440. The first bearing holder 410 and the motor housing 440 are made of magnetic material.
第１のベアリングホルダ４１０は、上述の実施形態のベアリングホルダ１０と同様に、上側ベアリング保持部（ベアリング保持部）４１５と、第１の側壁部４１１と、第２の平坦部４１７と、第２の側壁部４１２と、第１の平坦部４１６と、を有する。上側ベアリング保持部４１５は、上側ベアリング６を保持する。第１の側壁部４１１は、上側ベアリング保持部４１５の筒部４１５ａの下端部から上側に延びる。第２の平坦部４１７は、第１の側壁部４１１の上端部４１１ａから径方向外側に延びる。第２の側壁部４１２は、第２の平坦部４１７の径方向外側端部から下側に向かって延びる。第１の平坦部４１６は、第２の側壁部４１２の下端部４１２ｂから径方向外側に延びる。第１の平坦部４１６の径方向外側端部は、筒状部４４４の
上端部と繋がる。　 Similar to the bearing holder 10 of the above-described embodiment, the first bearing holder 410 has an upper bearing holding portion (bearing holding portion) 415, a first side wall portion 411, a second flat portion 417, a second And a first flat portion 416. The upper bearing holder 415 holds the upper bearing 6. The first side wall 411 extends upward from the lower end of the cylindrical portion 415 a of the upper bearing holder 415. The second flat portion 417 extends radially outward from the upper end 411 a of the first side wall 411. The second side wall portion 412 extends downward from the radially outer end of the second flat portion 417. The first flat portion 416 extends radially outward from the lower end portion 412 b of the second side wall portion 412. The radially outer end of the first flat portion 416 is connected to the upper end of the cylindrical portion 444.
第１の側壁部４１１は、センサマグネット２９を径方向外側から隙間を介して囲む。第１の側壁部４１１は、磁気シールドとして機能する。したがって、外部からの磁気的なノイズが回転センサ５１の検知結果に影響を及ぼすことを抑制できる。また、センサマグネット２９により生じる磁場が、電子部品５５に影響を及ぼすことを抑制できる。　 The first side wall 411 surrounds the sensor magnet 29 from the radially outer side with a gap. The first side wall 411 functions as a magnetic shield. Therefore, the influence of external magnetic noise on the detection result of the rotation sensor 51 can be suppressed. Further, the magnetic field generated by the sensor magnet 29 can be prevented from affecting the electronic component 55.
第２のベアリングホルダ４６０は、筒状部４４４の下端部に位置する。第２のベアリングホルダ４６０は、筒状部４４４の下側の開口を覆う。第２のベアリングホルダ４６０は、モータハウジング４４０と別部材である。　 The second bearing holder 460 is located at the lower end of the cylindrical portion 444. The second bearing holder 460 covers the lower opening of the cylindrical portion 444. The second bearing holder 460 is a separate member from the motor housing 440.
第２のベアリングホルダ４６０は、固定部４６１と、上側迂回部４６５と、下側迂回部４６６と、平板部４６３と、下側ベアリング保持部４６８と、を有する。下側ベアリング保持部４６８は、下側ベアリング７を保持する。また、下側ベアリング保持部４６８は、平板部４６３の平面視中央に位置する。平板部４６３は、下側ベアリング保持部４６８から径方向外側に延びる。　 The second bearing holder 460 includes a fixing portion 461, an upper detour portion 465, a lower detour portion 466, a flat plate portion 463, and a lower bearing holding portion 468. The lower bearing holder 468 holds the lower bearing 7. The lower bearing holding portion 468 is located at the center of the flat portion 463 in plan view. The flat portion 463 extends radially outward from the lower bearing holding portion 468.
下側迂回部４６６は、平板部４６３の径方向外側に位置する。下側迂回部４６６は、径方向内側から外側に向かうに従い下側に迂回して再び上側に延びる。モータ１の下側には、外部システム（図示略）が接続される。外部システムは、シャフト２１の下端部に接続されてモータ１から動力を伝達される伝達軸（図示略）と、下側迂回部４６６の内周面に嵌合しシャフト２１に伝達軸を位置決めする位置決め部（図示略）と、を有する。すなわち、第２のベアリングホルダ４６０に下側迂回部４６６が設けられていることで、外部システムとの径方向の位置決めが容易となる。　 The lower detour 466 is located radially outward of the flat portion 463. The lower bypassing portion 466 bypasses downward as it goes from the radially inner side to the outer side and extends upward again. An external system (not shown) is connected to the lower side of the motor 1. The external system is engaged with a transmission shaft (not shown) connected to the lower end portion of the shaft 21 to transmit power from the motor 1 and the inner peripheral surface of the lower detour 466 to position the transmission shaft on the shaft 21 And a positioning unit (not shown). That is, by providing the lower detour 466 in the second bearing holder 460, radial positioning with the external system becomes easy.
また、上側迂回部４６５は、下側迂回部４６６の径方向外側に位置する。上側迂回部４６５は、径方向内側から外側に向かうに従い上側に迂回して再び下側に延びる。上側迂回部４６５は、筒状部４４４に沿って延びる嵌合部４６５ａを有する。嵌合部４６５ａは、筒状部４４４の内周面に嵌合される。これにより、第２のベアリングホルダ４６０は、筒状部４４４に対して径方向に位置決めされる。　 Further, the upper detour 465 is located radially outward of the lower detour 466. The upper detour 465 bypasses upward as it goes from the radially inner side to the outer side and extends downward again. The upper detour 465 has a fitting portion 465 a extending along the tubular portion 444. The fitting portion 465 a is fitted to the inner circumferential surface of the cylindrical portion 444. Thereby, the second bearing holder 460 is positioned in the radial direction with respect to the cylindrical portion 444.
固定部４６１は、上側迂回部４６５の下端部から径方向外側に延びる。固定部４６１は、中心軸Ｊと直交する平面に沿って延びる。固定部４６１は、フランジ部４４５に沿って延びる。固定部４６１は、ボルト４０８およびナット４０９によってフランジ部４４５に固定される。なお、固定部４６１は、フランジ部４４５のみならず外部システムとも固定されていてもよい。　 The fixing portion 461 extends radially outward from the lower end portion of the upper detour portion 465. The fixing portion 461 extends along a plane orthogonal to the central axis J. The fixing portion 461 extends along the flange portion 445. The fixing portion 461 is fixed to the flange portion 445 by a bolt 408 and a nut 409. The fixing portion 461 may be fixed not only to the flange portion 445 but also to the external system.
＜変形例５＞　図６に、上述の実施形態に採用可能な変形例５のモータ５０１の断面図である。なお、上述の実施形態と同一態様の構成要素については、同一符号を付し、その説明を省略する。　 <Modification 5> FIG. 6 is a cross-sectional view of a motor 501 of Modification 5 that can be adopted in the above-described embodiment. In addition, about the component of the aspect same as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
上述の実施形態と同様に、ベアリングホルダ５１０は、磁性材料から構成される。ベアリングホルダ５１０は、板状部材を折り曲げ加工することで成形される。　 Similar to the previous embodiments, the bearing holder 510 is comprised of a magnetic material. The bearing holder 510 is formed by bending a plate-like member.
ベアリングホルダ５１０は、上側ベアリング保持部（ベアリング保持部）５１５と、オフセット部５１８と、第１の側壁部５１１と、第２の平坦部５１７と、第２の側壁部５１２と、第１の平坦部５１６と、嵌合部５１９Ａと、固定部５１９Ｂと、を有する。上側ベアリング保持部５１５と、オフセット部５１８、第１の側壁部５１１、第２の平坦部５１７、第２の側壁部５１２、第１の平坦部５１６、嵌合部５１９Ａおよび固定部５１９Ｂは、径方向内側から外側に向かってこの順で配置される。　 The bearing holder 510 includes an upper bearing holding portion (bearing holding portion) 515, an offset portion 518, a first side wall portion 511, a second flat portion 517, a second side wall portion 512, and a first flat surface. It has a portion 516, a fitting portion 519A, and a fixing portion 519B. Upper bearing holding portion 515, offset portion 518, first side wall portion 511, second flat portion 517, second side wall portion 512, first flat portion 516, fitting portion 519A and fixing portion 519B have diameters Direction is arranged in this order from the inside to the outside.
上側ベアリング保持部５１５は、上側ベアリング６を保持する。オフセット部５１８は、上側ベアリング保持部５１５の下端から径方向外側に延びる。第１の側壁部５１１は、オフセット部５１８の径方向外側の端部から上側に延びる。第２の平坦部５１７は、第１の側壁部５１１の上端部から径方向外側に延びる。第２の側壁部５１２は、第２の平坦部５１７の径方向外側の端部から下側に向かって延びる。第１の平坦部５１６は、第２の側壁部５１２の下端部から径方向外側に延びる。　 The upper bearing holder 515 holds the upper bearing 6. The offset portion 518 extends radially outward from the lower end of the upper bearing holder 515. The first side wall portion 511 extends upward from the radially outer end of the offset portion 518. The second flat portion 517 extends radially outward from the upper end portion of the first side wall portion 511. The second side wall portion 512 extends downward from the radially outer end of the second flat portion 517. The first flat portion 516 extends radially outward from the lower end portion of the second side wall portion 512.
嵌合部５１９Ａは、第１の平坦部５１６の径方向外側の端部から下側に延びる内筒部５１９Ａａと、内筒部５１９Ａａの下端部から上側に延びる外筒部５１９Ａｂとを有する。すなわち、嵌合部５１９Ａは、下側に迂回して上側に戻る様に成形されている。内筒部５１９Ａａおよび外筒部５１９Ａｂは、周方向に沿って筒状に延びる。嵌合部５１９Ａは、モータハウジング４０の筒状部４４の内周面に嵌合される。これにより、ベアリングホルダ５１０は、モータハウジング４０に対して径方向に位置決めされる。本実施形態によれば、嵌合部５１９Ａの内筒部５１９Ａａおよび外筒部５１９Ａｂは、径方向に対向して互いに接触する。このため、嵌合部５１９Ａの剛性が高まりベアリングホルダ５１０とモータハウジング４０との固定の安定性を高めることができる。　 The fitting portion 519A has an inner cylindrical portion 519Aa extending downward from the radial outer end of the first flat portion 516 and an outer cylindrical portion 519Ab extending upward from the lower end of the inner cylindrical portion 519Aa. That is, the fitting portion 519A is formed to detour downward and return upward. The inner cylindrical portion 519Aa and the outer cylindrical portion 519Ab cylindrically extend along the circumferential direction. The fitting portion 519A is fitted to the inner peripheral surface of the cylindrical portion 44 of the motor housing 40. Thereby, the bearing holder 510 is radially positioned with respect to the motor housing 40. According to the present embodiment, the inner cylindrical portion 519Aa and the outer cylindrical portion 519Ab of the fitting portion 519A face each other in the radial direction and contact each other. Therefore, the rigidity of the fitting portion 519A can be enhanced, and the stability of the fixing between the bearing holder 510 and the motor housing 40 can be enhanced.
固定部５１９Ｂは、嵌合部５１９Ａから径方向外側および上側の端部から径方向外側に延びる。固定部５１９Ｂの軸方向の位置は、第１の平坦部５１６の軸方向の位置と略一致する。固定部５１９Ｂは、モータハウジング４０のフランジ部４５に沿って延びる。固定部５１９Ｂは、ボルト８およびナット９によってフランジ部４５に固定される。　 The fixing portion 519B extends radially outward from the radially outer and upper ends from the fitting portion 519A. The axial position of the fixing portion 519 B substantially coincides with the axial position of the first flat portion 516. The fixing portion 519 B extends along the flange portion 45 of the motor housing 40. The fixing portion 519 B is fixed to the flange portion 45 by the bolt 8 and the nut 9.
以上に、本発明の実施形態および変形例を説明したが、実施形態および変形例における各構成およびそれらの組み合わせ等は一例であり、本発明の趣旨から逸脱しない範囲内で、構成の付加、省略、置換およびその他の変更が可能である。また、本発明は実施形態によって限定されることはない。　 Although the embodiment and the modified example of the present invention have been described above, each configuration and the combination thereof in the embodiment and the modified example are an example, and addition and omission of the configuration are possible without departing from the spirit of the present invention , Substitution and other modifications are possible. Further, the present invention is not limited by the embodiments.
例えば、上述の実施形態および変形例において、回路基板を有するモータについて説明した。しかしながら、回路基板をモータと別構成としていてもよい。すなわち、モータを別途用意した制御ユニットに接続することで、モータの上側に回路基板を配置させる構成としてもよい。同様に、センサマグネットをモータと別構成としてもよい。　 For example, in the above-mentioned embodiment and modification, the motor which has a circuit board was explained. However, the circuit board may be configured separately from the motor. That is, the circuit board may be disposed on the upper side of the motor by connecting the motor to a separately prepared control unit. Similarly, the sensor magnet may be configured separately from the motor.
また、上述の実施形態および変形例において、モータは、１つの回路基板を有する場合を例示した。しかしながら、モータは、上下方向に積層された複数の回路基板を有していてもよい。　 Moreover, in the above-mentioned embodiment and modification, the motor illustrated the case where it has one circuit board. However, the motor may have a plurality of circuit boards stacked in the vertical direction.
また、上述の実施形態および変形例において、第１の側壁部は、軸方向に沿って直線的に延びる。しかしながら、第１の側壁部は、シャフト２１の一部を径方向外側から囲みマグネット固定部２２より上側まで延びる構成であれば、軸方向に沿って湾曲していてもよく、また折り曲げられていてもよい。例えば、第１の側壁部は、上側に延びる途中に径方向外側に迂回するように折り曲げられていてもよい。 Moreover, in the above-mentioned embodiment and modification, the first side wall extends linearly along the axial direction. However, the first side wall portion may be curved along the axial direction as long as it is configured to surround a part of the shaft 21 from the radially outer side and extend to the upper side of the magnet fixing portion 22. It is also good. For example, the first side wall portion may be bent so as to bypass radially outward in the middle of extending upward.
１，４０１，５０１…モータ、６…上側ベアリング（ベアリング）、１０，１１０，２１０，３１０，４１０，５１０…ベアリングホルダ、１１，１１１，２１１，３１１，４１１，５１１…第１の側壁部、１２，１１２，２１２，３１２，４１２，５１２…第２の側壁部、１６，１１６，２１６，３１６，４１６，５１６…第１の平坦部、１７，２１７，４１７，５１７…第２の平坦部、２０…ロータ、２１…シャフト、２２…マグネット固定部、２９…センサマグネット、３０…ステータ、４０，４４０…モータハウジング（ハウジング）、４４，４４４…筒状部、５０…回路基板、５１…回転センサ、Ｊ…中心軸 1, 401, 501: motor, 6: upper side bearing (bearing), 10, 110, 210, 310, 410, 510: bearing holder, 11, 111, 211, 311, 411, 511: first side wall portion 12, , 112, 212, 312, 412, 512 ... second side wall portion, 16, 116, 216, 316, 416, 516 ... first flat portion, 17, 217, 417, 517 ... second flat portion, 20 ... Rotor, 21 ... shaft, 22 ... magnet fixing part, 29 ... sensor magnet, 30 ... stator, 40, 440 ... motor housing (housing) 44, 444 ... cylindrical part, 50 ... circuit board, 51 ... rotation sensor, J: Central axis

Claims (7)

  1. 上下方向に延びる中心軸に沿って配置されたシャフトを有し前記中心軸周りに回転するロータと、

    　前記ロータと径方向に隙間を介して対向するステータと、

    　前記シャフトの上端部を回転可能に支持するベアリングと、

    　前記ベアリングを支持するベアリングホルダと、を備え、

    　前記シャフトの上端部には、センサマグネットが取り付けられるマグネット固定部が設けられ、

    　前記ベアリングホルダは、磁性材料から構成され、

    　前記ベアリングホルダは、

    　　前記シャフトの一部を径方向外側から囲み前記マグネット固定部より上側まで延びる第１の側壁部と、

    　　前記第１の側壁部の径方向外側において前記中心軸と直交する平面に沿って延び前記第１の側壁部の上端部より下側に位置する第１の平坦部と、を有する、モータ。     A rotor having a shaft disposed along a vertically extending central axis and rotating around the central axis;

    A stator that faces the rotor in the radial direction via a gap;

    A bearing rotatably supporting the upper end of the shaft;

    And a bearing holder for supporting the bearing.

    At an upper end portion of the shaft, a magnet fixing portion to which a sensor magnet is attached is provided.

    The bearing holder is made of a magnetic material,

    The bearing holder is

    A first side wall portion surrounding a part of the shaft from the radially outer side and extending above the magnet fixing portion;

    A motor comprising: a first flat portion extending along a plane orthogonal to the central axis at a radially outer side of the first side wall portion and positioned below an upper end portion of the first side wall portion.
  2. 前記ステータを径方向外側から囲む筒状部を有するハウジングを備え、

    　前記ベアリングホルダは、前記筒状部の上端部に固定される、

    請求項１に記載のモータ。     A housing having a cylindrical portion surrounding the stator from the radially outer side,

    The bearing holder is fixed to an upper end portion of the cylindrical portion.

    The motor according to claim 1.
  3. 前記ステータを径方向外側から囲む筒状部を有するハウジングを備え、

    　前記ベアリングホルダは、前記筒状部の上端部に位置し、

    　前記ハウジングと前記ベアリングホルダとが、単一の部材である、

    請求項１に記載のモータ。     A housing having a cylindrical portion surrounding the stator from the radially outer side,

    The bearing holder is located at the upper end of the cylindrical portion,

    The housing and the bearing holder are a single member;

    The motor according to claim 1.
  4. 前記ベアリングホルダは、前記第１の側壁部を径方向外側から囲む第２の側壁部を有し、

    　前記第１の側壁部の上端部と前記第２の側壁部の上端部とが接続され、

    　前記第１の平坦部は、前記第２の側壁部の下端部から径方向外側に延びる、

    請求項１～３の何れか一方の記載のモータ。     The bearing holder has a second side wall that surrounds the first side wall radially from the outer side,

    An upper end portion of the first side wall portion and an upper end portion of the second side wall portion are connected;

    The first flat portion extends radially outward from the lower end of the second side wall portion.

    The motor according to any one of claims 1 to 3.
  5. 前記第１の側壁部と前記第２の側壁部とが、径方向に対向して互いに接触する、

    請求項４に記載のモータ。     The first side wall portion and the second side wall portion are radially opposed and in contact with each other,

    The motor according to claim 4.
  6. 前記ベアリングホルダは、前記第１の側壁部の上端部と前記第２の側壁部の上端部とを接続し前記中心軸と直交する平面に沿って延びる第２の平坦部を有する、

    請求項４に記載のモータ。     The bearing holder has a second flat portion which connects the upper end portion of the first side wall portion and the upper end portion of the second side wall portion and extends along a plane orthogonal to the central axis.

    The motor according to claim 4.
  7. 前記マグネット固定部に取り付けられた前記センサマグネットと、

    　前記センサマグネットの上側に位置し前記中心軸と直交する平面に沿って延びる回路基板と、を備え、

    　前記回路基板には、前記センサマグネットと軸方向に対向する回転センサが実装される、

    請求項１～６の何れか一項に記載のモータ。     The sensor magnet attached to the magnet fixing portion;

    And a circuit board located above the sensor magnet and extending along a plane perpendicular to the central axis,

    The circuit board is mounted with a rotation sensor axially facing the sensor magnet,

    The motor according to any one of claims 1 to 6.
PCT/JP2018/021939 2017-08-04 2018-06-07 Motor WO2019026419A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111668997A (en) * 2019-03-08 2020-09-15 日本电产株式会社 Motor with a stator having a stator core
JP2021083144A (en) * 2019-11-14 2021-05-27 株式会社デンソー Rotary electric machine
JP2021106442A (en) * 2019-12-26 2021-07-26 日本電産トーソク株式会社 Electric actuator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60141147A (en) * 1983-12-28 1985-07-26 Toshiba Corp Controller-containing rotary electric machine
JP2016140147A (en) * 2015-01-26 2016-08-04 株式会社デンソー Rotary electric machine
JP2016192851A (en) * 2015-03-31 2016-11-10 日本電産株式会社 Motor and electric power steering device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60141147A (en) * 1983-12-28 1985-07-26 Toshiba Corp Controller-containing rotary electric machine
JP2016140147A (en) * 2015-01-26 2016-08-04 株式会社デンソー Rotary electric machine
JP2016192851A (en) * 2015-03-31 2016-11-10 日本電産株式会社 Motor and electric power steering device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111668997A (en) * 2019-03-08 2020-09-15 日本电产株式会社 Motor with a stator having a stator core
JP2021083144A (en) * 2019-11-14 2021-05-27 株式会社デンソー Rotary electric machine
JP2021106442A (en) * 2019-12-26 2021-07-26 日本電産トーソク株式会社 Electric actuator

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