WO2018062006A1 - Moteur et dispositif de direction assistée électrique - Google Patents

Moteur et dispositif de direction assistée électrique Download PDF

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Publication number
WO2018062006A1
WO2018062006A1 PCT/JP2017/034194 JP2017034194W WO2018062006A1 WO 2018062006 A1 WO2018062006 A1 WO 2018062006A1 JP 2017034194 W JP2017034194 W JP 2017034194W WO 2018062006 A1 WO2018062006 A1 WO 2018062006A1
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WO
WIPO (PCT)
Prior art keywords
bus bar
hole
vertical direction
holder
columnar
Prior art date
Application number
PCT/JP2017/034194
Other languages
English (en)
Japanese (ja)
Inventor
幸祐 小川
敬史 瀬口
俊輔 村上
剛央 新子
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 JP2018542499A priority Critical patent/JPWO2018062006A1/ja
Priority to CN201780059959.4A priority patent/CN109792183B/zh
Publication of WO2018062006A1 publication Critical patent/WO2018062006A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/065—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by specially adapted means for varying pressurised fluid supply based on need, e.g. on-demand, variable assist
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/10—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of power unit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/04—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings, prior to mounting into machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto

Definitions

  • the present invention relates to a motor and an electric power steering apparatus.
  • a motor equipped with a bus bar unit is known.
  • the bus bar unit of Patent Document 1 is attached to a stator core.
  • the bus bar may be fixed on the bus bar holder that holds the bus bar. In this case, when the bus bar is positioned, the position of the bus bar may be shifted. Therefore, it may be difficult to fix the bus bar on the bus bar holder with high positional accuracy.
  • an object of the present invention is to provide a motor having a structure capable of fixing a bus bar to a bus bar holder with high positional accuracy, and an electric power steering apparatus including such a motor.
  • a motor includes a rotor having a shaft disposed along a central axis extending in the vertical direction, a stator disposed radially outside the rotor, and a bus bar disposed above the stator.
  • a bus bar unit electrically connected to the stator, and a bus bar holder for holding the bus bar, wherein the bus bar passes through the bus bar in a vertical direction.
  • the bus bar holder includes a bus bar holder main body that supports the bus bar from below, and a first protrusion that protrudes upward from an upper surface of the bus bar holder main body, and the first protrusion
  • the first columnar portion extending upward from the upper surface of the bus bar holder main body along the first columnar portion axis extending in the vertical direction, and passed through the first through hole
  • a first welded portion that is disposed at the upper end of the one columnar portion, contacts the upper surface of the bus bar, and protrudes from the outer peripheral surface of the first columnar portion, and is disposed at intervals from each other along the axis of the first columnar portion.
  • a plurality of ribs, and the plurality of ribs are in contact with an inner peripheral surface of the first through hole.
  • a motor having a structure capable of fixing a bus bar to a bus bar holder with high positional accuracy, and an electric power steering apparatus including such a motor are provided.
  • FIG. 1 is a cross-sectional view showing the motor of this embodiment.
  • FIG. 2 is a perspective view showing a portion of the motor of this embodiment.
  • FIG. 3 is a plan view showing a portion of the motor of this embodiment.
  • FIG. 4 is a perspective view showing a portion of the bus bar holder of the present embodiment.
  • FIG. 5 is a cross-sectional view showing a portion of the bus bar unit of the present embodiment.
  • FIG. 6 is a cross-sectional view showing a portion of the bus bar unit of the present embodiment.
  • FIG. 7 is a view showing a portion of the bus bar unit of the present embodiment, and is a cross-sectional view taken along the line VII-VII in FIG. FIG.
  • FIG. 8 is a cross-sectional view showing a portion of the bus bar unit of the present embodiment.
  • FIG. 9 is a cross-sectional view showing a portion of a bus bar unit that is another example of the present embodiment.
  • FIG. 10 is a schematic diagram showing the electric power steering apparatus of the present embodiment.
  • the motor 10 of this embodiment includes a rotor 30, a stator 40, a housing 20, a bearing holder 50, a bus bar unit 60, and a control device 80.
  • the rotor 30 has a shaft 31 and a rotor core 32.
  • the shaft 31 is disposed along a central axis J that extends in the vertical direction.
  • the rotor core 32 is fixed to the outer peripheral surface of the shaft 31.
  • a direction parallel to the central axis J is simply referred to as “vertical direction”
  • a radial direction centered on the central axis J is simply referred to as “radial direction”
  • a circumferential direction centered on the central axis J is referred to as “circumferential direction”. It is simply called “circumferential direction”.
  • the upper side in FIG. 1 in the vertical direction is simply referred to as “upper side”
  • the lower side in FIG. 1 in the vertical direction is simply referred to as “lower side”. Note that the upper side, the lower side, and the vertical direction are simply names for explaining the relative positional relationship between the respective parts, and do not limit the actual positional relationship and the like.
  • the stator 40 is disposed outside the rotor 30 in the radial direction.
  • the stator 40 includes an annular stator core 41, an insulator 42 attached to the stator core 41, and a coil 43 attached to the stator core 41 via the insulator 42.
  • the housing 20 has a cylindrical shape that houses each part of the motor 10.
  • illustration of the control apparatus 80 is abbreviate
  • the bearing holder 50 has a substantially disk shape extending in the radial direction.
  • the bearing holder 50 is disposed on the upper side of the stator 40.
  • the bearing holder 50 holds a bearing that rotatably supports the shaft 31 on the upper side of the rotor core 32.
  • the bus bar unit 60 has a substantially disk shape that expands in the radial direction as a whole.
  • Bus bar unit 60 is arranged above stator 40. More specifically, the bus bar unit 60 is fixed to the upper surface of the bearing holder 50.
  • the bus bar unit 60 includes a bus bar 70 and a bus bar holder 60a.
  • the bus bar holder 60a holds the bus bar 70.
  • the bus bar holder 60 a has a substantially disk shape that expands in the radial direction.
  • the bus bar holder 60 a is fitted inside the housing 20 in the radial direction.
  • the lower surface of the bus bar holder 60 a is in contact with the upper surface of the bearing holder 50.
  • the bus bar holder 60a is made of resin, for example.
  • the bus bar holder 60 a includes a bus bar holder main body 66, a plurality of first protrusions 67, and a plurality of second protrusions 68.
  • the bus bar holder main body 66 is a disk-shaped portion that expands in the radial direction.
  • the bus bar holder main body 66 supports the bus bar 70 from below.
  • the bus bar holder main body 66 has a recess 66b.
  • the recess 66b is recessed downward on the upper surface 66a of the bus bar holder body 66.
  • the outer shape in plan view of the recess 66b is circular.
  • a plurality of the recesses 66b are provided in the present embodiment.
  • the bus bar holder main body 66 has a first holder through hole 66c and a second holder through hole 66d that penetrate the bus bar holder main body 66 in the vertical direction.
  • the first holder through-hole 66 c is disposed in the center of the bus bar holder main body 66.
  • the plan view shape of the first holder through-hole 66c is a circular shape centered on the central axis J.
  • the shaft 31 is passed through the first holder through hole 66c.
  • a plurality of second holder through holes 66d are provided along the circumferential direction.
  • the planar view shape of the second holder through hole 66d is a circular shape.
  • a conductor 43a described later is passed through the second holder through hole 66d.
  • the first protrusion 67 protrudes upward from the upper surface 66a of the bus bar holder main body 66.
  • the upper surface 66 a of the bus bar holder main body 66 is a surface facing the upper side among the surfaces of the bus bar holder main body 66.
  • the upper surface 66a of the bus bar holder main body 66 includes the bottom surface of the recess 66b.
  • the first protrusion 67 protrudes upward from the bottom surface of the recess 66 b in the upper surface 66 a of the bus bar holder main body 66.
  • the 1st projection part 67 has the 1st columnar part 67a, the 1st welding part 67b, and the some rib 67c.
  • the first columnar portion 67a extends upward from the upper surface 66a of the bus bar holder main body 66 along the first columnar portion axis O1 extending in the vertical direction.
  • the first columnar part axis O1 passes through the center of the first columnar part 67a.
  • the first columnar portion 67a has a columnar shape.
  • the 1st welding part 67b is a hemisphere which becomes convex on the upper side.
  • the 1st welding part 67b is arrange
  • the first welded portion 67b is in contact with the upper surface 70d of the bus bar 70. More specifically, a radially outer edge portion around the first columnar portion axis O ⁇ b> 1 in the first welded portion 67 b contacts the upper surface 70 d of the bus bar 70.
  • the first welded portion 67 b is a portion where the upper end portion of the first projecting portion 67 is melted by heat and welded to the upper surface 70 d of the bus bar 70. 1 to 5 show a state before the upper end of the first protrusion 67 is welded. As shown in FIG. 6, the 1st welding part 67b overlaps with the recessed part 66b in an up-down direction.
  • the plurality of ribs 67c protrude from the outer peripheral surface of the first columnar portion 67a.
  • the rib 67c extends in the vertical direction.
  • the rib 67c has a prismatic shape elongated in the vertical direction.
  • the rib 67c extends from the bottom surface of the recess 66b to the upper portion of the first columnar portion 67a.
  • the cross-sectional shape perpendicular to the vertical direction of the rib 67c has a long radial inner side centered on the first columnar part axis O1, and a radially outer side centered on the first columnar part axis O1. This is a substantially trapezoidal shape with short sides.
  • the plurality of ribs 67c are arranged at intervals from each other around the first columnar portion axis O1.
  • the plurality of ribs 67c are arranged at equal intervals along the first columnar portion axis O1.
  • four ribs 67c are provided on one first protrusion 67, and the four ribs 67c are arranged at equal intervals along the first columnar part axis O1.
  • the protruding height of the upper end of the rib 67c decreases from the lower side toward the upper side. Thereby, it is easy to press-fit the first protrusion 67 into the first through hole 70b described later.
  • the upper end portion of the rib 67c shown in FIG. 5 is melted together with the upper end portion of the first columnar portion 67a.
  • the upper end of the rib 67c is connected to the lower surface of the 1st weld part 67b.
  • the protruding height of the rib 67c is substantially uniform over the entire vertical direction.
  • the second protrusion 68 protrudes upward from the upper surface 66a of the bus bar holder body 66.
  • the second protrusion 68 protrudes upward from the bottom surface of the recess 66 b in the upper surface 66 a of the bus bar holder main body 66.
  • the 2nd projection part 68 has the 2nd columnar part 68a and the 2nd welding part 68b. Unlike the first protrusion 67, the second protrusion 68 does not have the rib 67c.
  • the second columnar portion 68a extends upward from the upper surface 66a of the bus bar holder main body 66 along the second columnar portion axis O2 extending in the vertical direction.
  • the second columnar part axis O2 passes through the center of the second columnar part 68a.
  • the second columnar portion 68a has a cylindrical shape.
  • the second welded portion 68b has a hemispherical shape that protrudes upward.
  • the second welded portion 68b is disposed at the upper end of the second columnar portion 68a.
  • the second welded portion 68b contacts the upper surface 70d of the bus bar 70. More specifically, a radially outer edge portion around the second columnar portion axis O ⁇ b> 2 of the second welded portion 68 b contacts the upper surface 70 d of the bus bar 70.
  • the second welded portion 68 b is a portion where the upper end portion of the second protrusion 68 is melted by heat and welded to the upper surface 70 d of the bus bar 70.
  • the shape before the upper end of the second protrusion 68 is welded is the shape obtained by removing the rib 67c from the first protrusion 67 before the upper end shown in FIGS. 4 and 5 is welded. It is the same. As shown in FIG. 8, the second welded portion 68b overlaps the recessed portion 66b in the vertical direction.
  • the bus bar 70 has a plate shape.
  • the bus bar 70 is disposed on the upper surface 66 a of the bus bar holder main body 66.
  • Bus bar 70 is electrically connected to stator 40. More specifically, the bus bar 70 is electrically connected to the coil 43 via a conductive wire 43 a extending upward from the coil 43.
  • the conducting wire 43a is drawn upward from the bus bar holder 60a through a hole penetrating the bearing holder 50 in the vertical direction and a second holder through hole 66d.
  • the conducting wire 43 a is an end portion of the conducting wire constituting the coil 43.
  • the conducting wire 43a may be a separate member from the coil 43.
  • the bus bar 70 includes five bus bars: a first bus bar 71, a second bus bar 72, a third bus bar 73, a fourth bus bar 74, and a fifth bus bar 75.
  • the first bus bar 71, the second bus bar 72, and the third bus bar 73 are, for example, phase bus bars.
  • the fourth bus bar 74 and the fifth bus bar 75 are neutral point bus bars.
  • the first bus bar 71 includes a main body portion 71a, two gripping portions 76, and a terminal portion 77.
  • the main body 71a is an elongated plate extending along a plane orthogonal to the vertical direction.
  • the plate surface of the main body 71a is orthogonal to the vertical direction.
  • the main body 71a includes a first portion 71b, a second portion 71c, a third portion 71d, and a fourth portion 71e.
  • the first portion 71b is a portion extending in a substantially arc shape along the circumferential direction on the radially outer side than the second holder through-hole 66d.
  • a gripping portion 76 is connected to one circumferential end of the first portion 71b.
  • a terminal portion 77 is connected to the other circumferential end of the first portion 71b.
  • the second portion 71c is a portion extending linearly from the circumferential center of the first portion 71b to the peripheral edge of the first holder through hole 66c. The second portion 71c passes between the second holder through holes 66d adjacent in the circumferential direction.
  • the third portion 71d is a portion that extends in an arc shape from the radially inner end portion of the second portion 71c along the peripheral edge portion of the first holder through hole 66c.
  • the fourth portion 71e is a portion that extends radially outward from the end of the third portion 71d opposite to the side where the second portion 71c is connected.
  • a gripping portion 76 is connected to the radially outer end portion of the fourth portion 71e.
  • the second bus bar 72 is arranged on the opposite side in the radial direction with respect to the first bus bar 71 with the central axis J interposed therebetween.
  • the second bus bar 72 includes a main body portion 72 a, two gripping portions 76, and a terminal portion 77.
  • the main body 72a is in the form of an elongated plate that extends along a plane perpendicular to the vertical direction.
  • the plate surface of the main body 72a is orthogonal to the vertical direction.
  • the main body portion 72a includes a first portion 72b, a second portion 72c, a third portion 72d, and a fourth portion 72e.
  • the first portion 72 b is disposed on the radially inner side of the first portion 71 b of the first bus bar 71.
  • the first portion 72b is a portion that extends linearly along the radial direction from the same radial position as the second holder through-hole 66d to the peripheral edge of the first holder through-hole 66c.
  • the direction in which the first portion 72b extends is parallel to the direction in which the second portion 71c of the first bus bar 71 extends.
  • the radially outer end portion of the first portion 72b is disposed between the second holder through holes 66d that are the same as the second holder through holes 66d through which the second portion 71c of the first bus bar 71 passes.
  • a grip 76 is connected to the radially outer end of the first portion 72b.
  • the second portion 72c is a portion that extends in an arc shape from the radially inner end portion of the first portion 72b along the peripheral edge portion of the first holder through hole 66c.
  • the second portion 72c is disposed on the opposite side in the radial direction across the third portion 71d of the first bus bar 71 and the central axis J.
  • the third portion 72d extends from the end of the second portion 72c opposite to the side where the first portion 72b is connected to the outer side in the radial direction than the second holder through hole 66d.
  • the third portion 72d passes between the second holder through holes 66d adjacent in the circumferential direction.
  • a gripping portion 76 is connected to the radial center of the third portion 72d.
  • the fourth portion 72e is a portion that extends linearly from the radially outer end of the third portion 72d in a direction substantially perpendicular to the direction in which the third portion 72d extends in plan view.
  • a terminal portion 77 is connected to the end of the fourth portion 72e opposite to the side to which the third portion 72d is connected.
  • the third bus bar 73 has a main body portion 73a, two gripping portions 76, and a terminal portion 77.
  • the main body portion 73a has an elongated plate shape extending along a plane orthogonal to the vertical direction.
  • the plate surface of the main body portion 73a is orthogonal to the vertical direction.
  • the main body 73a has a first portion 73b, a second portion 73c, and a third portion 73d.
  • the first portion 73b is a portion extending in a substantially arc shape along the circumferential direction at the radially outer edge portion of the bus bar holder main body 66.
  • the first portion 73b extends over a substantially half circumference in the circumferential direction.
  • a part of the first portion 73 b is disposed on the radially outer side of the first portion 71 b of the first bus bar 71.
  • a terminal portion 77 is connected to one circumferential end of the first portion 73b.
  • the second portion 73c is a portion extending radially inward from the other circumferential end of the first portion 73b.
  • the radially inner end of the second portion 73c is disposed between the second holder through holes 66d adjacent in the circumferential direction.
  • a gripping portion 76 is connected to the radially inner end portion of the second portion 73c.
  • the third portion 73d is a portion extending radially inward from a portion near the one end portion in the circumferential direction of the first portion 73b.
  • the radially inner end of the third portion 73d is disposed between the second holder through holes 66d adjacent in the circumferential direction.
  • a gripping portion 76 is connected to the radially inner end portion of the third portion 73d.
  • the fourth bus bar 74 has a main body portion 74a and three gripping portions 76.
  • the main body 74a has an elongated plate shape that extends along a plane perpendicular to the vertical direction.
  • the plate surface of the main body 74a is orthogonal to the vertical direction.
  • the main body 74a has a first portion 74b, a second portion 74c, a third portion 74d, and a fourth portion 74e.
  • the first portion 74b is a portion extending in a substantially arc shape along the circumferential direction on the radially outer side than the second holder through hole 66d.
  • the radial position of the first portion 74 b is substantially the same as the radial position of the first portion 71 b of the first bus bar 71.
  • the first portion 74 b is disposed on the radially outer side of the second portion 72 c of the second bus bar 72.
  • the second portion 74c is a portion extending radially inward from one circumferential end of the first portion 74b.
  • the radially inner end of the second portion 74c is disposed between the second holder through holes 66d adjacent in the circumferential direction.
  • a grip portion 76 is connected to the radially inner end of the second portion 74c.
  • the third portion 74d is a portion extending radially inward from the circumferential center of the first portion 74b.
  • the radially inner end of the third portion 74d is disposed between the second holder through holes 66d adjacent in the circumferential direction.
  • a gripping portion 76 is connected to the radially inner end portion of the third portion 74d.
  • the fourth portion 74e is a portion extending radially inward from the other circumferential end of the first portion 74b.
  • the radially inner end of the fourth portion 74e is disposed between the second holder through holes 66d adjacent in the circumferential direction.
  • a gripping portion 76 is connected to the radially inner end of the fourth portion 74e.
  • the fifth bus bar 75 is arranged on the opposite side of the radial direction across the central axis J with respect to the fourth bus bar 74.
  • the fifth bus bar 75 includes a main body portion 75 a and three gripping portions 76.
  • the main body 75a is an elongated plate that extends along a plane perpendicular to the vertical direction.
  • the plate surface of the main body 75a is orthogonal to the vertical direction.
  • the main body 75a has a first portion 75b, a second portion 75c, a third portion 75d, and a fourth portion 75e.
  • the first portion 75b is a portion extending in a substantially arc shape along the circumferential direction on the radially outer side than the second holder through hole 66d.
  • the radial position of the first portion 75 b is substantially the same as the radial position of the first portion 71 b of the first bus bar 71.
  • the first portion 74 b is disposed on the radially outer side of the third portion 71 d of the first bus bar 71.
  • the second portion 75c is a portion extending radially inward from one circumferential end of the first portion 75b.
  • the radially inner end of the second portion 75c is disposed between the second holder through holes 66d adjacent in the circumferential direction.
  • a gripping portion 76 is connected to the radially inner end portion of the second portion 75c.
  • the third portion 75d is a portion that extends radially inward from the circumferential center of the first portion 75b.
  • the radially inner end of the third portion 75d is disposed between the second holder through holes 66d adjacent in the circumferential direction.
  • a gripping portion 76 is connected to the radially inner end portion of the third portion 75d.
  • the fourth portion 75e is a portion extending radially inward from the other circumferential end of the first portion 75b.
  • the radially inner end of the fourth portion 75e is disposed between the second holder through holes 66d adjacent in the circumferential direction.
  • a gripping portion 76 is connected to the radially inner end portion of the fourth portion 75e.
  • the shape of the fifth bus bar 75 is the same as the shape of the fourth bus bar 74.
  • the fifth bus bar 75 and the fourth bus bar 74 are arranged point-symmetrically about the central axis J in plan view.
  • the positions of the main body portions 71a to 75a described above in the vertical direction are the same.
  • the main body portions 71a to 75a of each bus bar 70 are collectively referred to as a main body portion 70a.
  • the gripping part 76 is a part that grips the conductive wire 43a. As described above, the gripping portion 76 is provided on each bus bar 70. In the present embodiment, twelve gripping portions 76 are provided.
  • the planar view shape of the gripping portion 76 is a substantially U-shape that opens outward in the radial direction.
  • the plate surface of the grip portion 76 is parallel to the vertical direction.
  • Each gripping portion 76 is disposed at a position overlapping the second holder through hole 66d in plan view. As shown in FIG. 2, the gripping part 76 is disposed above the main body part 70a.
  • the gripping portion 76 has two arms that extend radially outward.
  • a conducting wire 43a is disposed between the two arms. From the state of the gripping portion 76 shown in FIG. 2, the lead wire 43a can be sandwiched in the circumferential direction by the two arm portions by plastically deforming the gripping portion 76 in a direction in which the two arm portions are brought closer to each other. In this state, the conductor 43a and the arm are fixed by welding, for example, and the conductor 43a and the grip 76 are electrically connected.
  • the terminal portions 77 are provided on the first bus bar 71, the second bus bar 72, and the third bus bar 73, respectively. That is, in the present embodiment, three terminal portions 77 are provided.
  • the terminal portion 77 extends upward from the main body portion 70a.
  • the plate surface of the terminal portion 77 is orthogonal to the circumferential direction.
  • the upper end of the terminal portion 77 is electrically connected to the control device 80.
  • the three terminal portions 77 are arranged at equal intervals along the circumferential direction.
  • the bus bar 70 has a first through hole 70 b that penetrates the bus bar 70 in the vertical direction.
  • the first columnar portion 67a is passed through the first through hole 70b.
  • the plan view shape of the first through hole 70b is a circular shape centered on the first columnar portion axis O1.
  • the plurality of ribs 67c are in contact with the inner peripheral surface of the first through hole 70b. Therefore, for example, the first protrusion 67 can be press-fitted into the first through hole 70b by elastically deforming the rib 67c radially inward. Thereby, it can suppress that the position of the 1st through-hole 70b shifts with respect to the 1st projection part 67.
  • the bus bar 70 when the bus bar 70 is installed in the bus bar holder 60a, the bus bar 70 can be prevented from being displaced, and the bus bar 70 can be fixed to the bus bar holder 60a with high positional accuracy.
  • the control device 80 when the control device 80 is provided as in the present embodiment, the terminal portions 77 connected to the control device 80 can be arranged with high positional accuracy. Therefore, the terminal unit 77 and the control device 80 can be connected with high accuracy and easily.
  • the first protrusion 67 is press-fitted into the first through hole 70b.
  • the outer shape indicated by a two-dot chain line is the outer shape of the rib 67c of the first protrusion 67 before being press-fitted into the first through hole 70b.
  • each rib 67c is elastically deformed radially inward with the first columnar portion axis O1 as the center. It becomes.
  • a force is applied to the rib 67c in a direction from the inner peripheral surface of the first through hole 70b toward the first columnar portion 67a.
  • a gap is provided between the portion of the outer peripheral surface of the first columnar portion 67a where the rib 67c is not provided and the radial direction between the inner peripheral surface of the first through hole 70b.
  • the elastically deformed rib 67c may be scraped and dropped onto the upper surface 66a of the bus bar holder main body 66. If a part of the scraped rib 67c adheres to a portion of the upper surface 66a where the lower surface of the bus bar 70 contacts, the bus bar 70 may be lifted by a part of the scraped rib 67c.
  • the recessed part 66b is provided, a part of the shaved rib 67c falls into the recessed part 66b.
  • the portion of the upper surface 66a that is in contact with the lower surface of the bus bar 70 is a portion of the upper surface 66a where the recess 66b is not provided, and includes the peripheral portion of the recess 66b.
  • the bus bar 70 can be more stably supported by the first protrusions 67, and the bus bar 70 can be further prevented from shifting.
  • the bus bar 70 can be supported more stably by the plurality of ribs 67c.
  • the plurality of ribs 67c are arranged at equal intervals around the first columnar part axis O1, the first columnar part axis O1 can be aligned with the center of the first through hole 70b in a plan view. The positional accuracy of the bus bar 70 with respect to the holder 60a can be further improved.
  • Two first through holes 70b are provided in each bus bar 70. That is, the bus bar 70 has two first through holes 70b.
  • Two first protrusions 67 are provided for each bus bar 70. That is, the bus bar holder 60 a has two first protrusions 67. The two first protrusions 67 are respectively passed through the two first through holes 70b. For example, when the positioning of one bus bar 70 is performed by one first protrusion 67, the position of the bus bar 70 may be shifted due to the rotation of the bus bar 70 around the first columnar portion axis O1.
  • the bus bar 70 can be prevented from rotating around the first columnar portion axis O1, and the position of the bus bar 70 with respect to the bus bar holder 60a. The accuracy can be further improved.
  • the first bus bar 71 has a first through hole 70b at the center in the circumferential direction of the first portion 71b and at a connection portion between the third portion 71d and the fourth portion 71e.
  • the second bus bar 72 has a first through hole 70b at a portion of the second portion 72c near the first portion 72b and at a radially outer end portion of the third portion 72d.
  • the third bus bar 73 has a first through hole 70b at a connection portion between the first portion 73b and the second portion 73c and a radially outer end portion of the third portion 73d.
  • the fourth bus bar 74 has first through holes 70b at both ends in the circumferential direction of the first portion 74b.
  • the fifth bus bar 75 has first through holes 70b at both ends in the circumferential direction of the first portion 75b.
  • the bus bar 70 has a second through hole 70 c that penetrates the bus bar 70 in the vertical direction.
  • the second columnar portion 68a is passed through the second through hole 70c.
  • the plan view shape of the second through hole 70c is a circular shape centered on the second columnar portion axis O2.
  • the inner diameter of the second through hole 70c is larger than the inner diameter of the first through hole 70b.
  • a gap DP that allows relative movement between the bus bar 70 and the second columnar portion 68a is provided between the outer peripheral surface of the second columnar portion 68a and the inner peripheral surface of the second through hole 70c.
  • the fixed portion may be fixed even if the two portions are fixed by the first protrusion 67 described above. In other cases, the bus bar 70 may float.
  • one bus bar 70 is fixed by three or more first protrusions 67, if an error occurs between the first protrusion 67 and the first through hole 70b, the error cannot be escaped, There may be a case where a part of the first protrusion 67 cannot be press-fitted into the first through hole 70b.
  • the bus bar 70 can be prevented from being lifted.
  • the second protrusion 68 and the second through hole 70c are allowed to move relative to each other through the gap DP. Therefore, when positioning the bus bar 70 with the two first protrusions 67, even if an error occurs in the relative position of the bus bar 70 with respect to the bus bar holder 60 a, the error can be absorbed by the gap DP, and the second protrusion 68. Can be prevented from being inserted into the second through hole 70c.
  • the bus bar 70 When the bus bar 70 is fixed by the two first protrusions 67, the bus bar 70 can be stably fixed by disposing the two first through holes 70b into which the two first protrusions 67 are press-fitted.
  • the two first through holes 70b are separated from each other, there is a problem that the floating is likely to occur between the first through holes 70b.
  • the 2nd through-hole 70c is arrange
  • the first bus bar 71 has a second through hole 70 c at a connection portion between the second portion 71 c and the third portion 71 d and a circumferential end of the first portion 71 b on the gripping portion 76 side.
  • the second through hole 70c provided in the connection portion between the second portion 71c and the third portion 71d is disposed on the first bus bar 71 between one of the two first through holes 70b and the other. .
  • the second bus bar 72 has a second through hole 70c at a connection portion between the second portion 72c and the third portion 72d.
  • the second through-hole 70c provided in the connection portion between the second portion 72c and the third portion 72d is disposed on the second bus bar 72 from one of the two first through-holes 70b toward the other. .
  • the third bus bar 73 has two second through holes 70c between both ends in the circumferential direction of the first portion 73b.
  • the second through hole 70c provided between the circumferential ends of the first portion 73b is disposed on the third bus bar 73 while going from one of the two first through holes 70b to the other.
  • each bus bar 70 the portion where the first through hole 70b is provided and the portion where the second through hole 70c is provided are wider than the portion where each through hole is not provided. Thereby, even if the 1st through-hole 70b and the 2nd through-hole 70c are provided, the cross-sectional area of the bus-bar 70 can be ensured and intensity
  • control device 80 is disposed above the stator 40.
  • the control device 80 controls the current supplied to the stator 40 via the bus bar 70. Therefore, the rotation speed of the motor 10 can be controlled.
  • the control device 80 is connected to an external power source (not shown).
  • the present invention is not limited to the above-described embodiment, and other configurations can be adopted.
  • the same configurations as those described above may be omitted by appropriately attaching the same reference numerals.
  • the first protrusion 67 may not be press-fitted into the first through hole 70b. Even in this case, the plurality of ribs 67c are in contact with the inner peripheral surface of the first through hole 70b, so that the relative movement between the first protrusion 67 and the first through hole 70b can be suppressed, and the bus bar 70 is positioned. it can.
  • the shape of the rib 67c is not particularly limited, and may extend around the first columnar part axis O1.
  • the number of ribs 67c may be two, three, or five or more.
  • the number of ribs 67 c may vary depending on the first protrusion 67.
  • the plurality of ribs 67c may be arranged at non-equal intervals around the first columnar portion axis O1.
  • the second protrusion 68 may or may not contact the inner peripheral surface of the second through hole 70c.
  • the second protrusion 68 may not be provided.
  • the number of first protrusions 67 and the number of second protrusions 68 are not particularly limited.
  • the configuration of the motor may be a configuration like the motor 110 shown in FIG.
  • the bus bar holder body 166 of the bus bar holder 160 a in the motor 110 has a bus bar insertion recess 166 e that is recessed downward on the upper surface of the bus bar holder body 166.
  • the bus bar 70 is inserted into the bus bar insertion recess 166e. Therefore, the thickness of the bus bar holder main body 166 can be increased without changing the thickness of the entire bus bar unit 160. Thereby, the rigidity of the bus bar holder body 166 can be improved without increasing the vertical dimension of the motor 110.
  • the upper surface 70d of the bus bar 70 and the upper end of the bus bar insertion recess 166e are arranged at the same height in the vertical direction. Therefore, the thickness of the bus bar holder body 166 can be increased without changing the thickness of the entire bus bar unit 160.
  • “arranged at the same height” includes not only the case where they are arranged at exactly the same height but also the case where they are arranged at substantially the same height. In FIG. 9, the entire main body 70a is inserted into the bus bar insertion recess 166e.
  • the upper surface of the main body 70a and the upper surface of the bus bar holder main body 166 at the peripheral edge of the bus bar insertion recess 166e are arranged on the same plane perpendicular to the vertical direction.
  • the upper surface of bus bar holder body 166 includes the bottom surface of bus bar insertion recess 166e and the bottom surface of recess 66b.
  • the electric power steering apparatus 2 shown in FIG. 10 is mounted on a steering mechanism for a vehicle wheel.
  • the electric power steering device 2 is a device that reduces the steering force by hydraulic pressure.
  • the electric power steering apparatus 2 includes a motor 10, a steering shaft 214, an oil pump 216, and a control valve 217.
  • the steering shaft 214 transmits the input from the steering 211 to the axle 213 having the wheels 212.
  • the oil pump 216 generates hydraulic pressure in the power cylinder 215 that transmits the hydraulic driving force to the axle 213.
  • the control valve 217 controls the oil of the oil pump 216.
  • the motor 10 is mounted as a drive source for the oil pump 216.
  • the electric power steering apparatus 2 of the present embodiment includes the motor 10 of the present embodiment, the position accuracy of the bus bar 70 can be improved. Thereby, according to this embodiment, the electric power steering device 2 excellent in reliability can be obtained.
  • a motor 110 may be mounted instead of the motor 10.
  • the motor of the above-described embodiment is not limited to the electric power steering device, and may be mounted on any device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Power Steering Mechanism (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Windings For Motors And Generators (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

Dans un moteur d'un mode de la présente invention, une unité de barre omnibus comprend une barre omnibus qui est connectée électriquement à un stator, et un support de barre omnibus qui retient la barre omnibus. La barre omnibus présente un premier trou traversant qui la perce dans la direction verticale. Le support de barre omnibus comprend un corps qui soutient la barre omnibus à partir du côté inférieur, et une première partie saillante qui fait saillie de la surface supérieure du corps de support de barre omnibus vers le côté supérieur. La première partie saillante comprend : une première partie en colonne qui s'étend le long d'un premier axe s'étendant dans la direction verticale, de la surface supérieure du corps de support de barre omnibus au côté supérieur, passant dans le premier trou traversant; une première partie soudée placée sur l'extrémité supérieure de la première partie en colonne, en contact avec la surface supérieure de la barre omnibus; et une pluralité de nervures faisant saillie de la surface périphérique externe de la première partie en colonne, disposées de manière espacée les unes des autres autour du premier axe de partie en colonne. La pluralité de nervures est en contact avec la surface périphérique interne du premier trou traversant.
PCT/JP2017/034194 2016-09-30 2017-09-22 Moteur et dispositif de direction assistée électrique WO2018062006A1 (fr)

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JP2018542499A JPWO2018062006A1 (ja) 2016-09-30 2017-09-22 モータ、および電動パワーステアリング装置
CN201780059959.4A CN109792183B (zh) 2016-09-30 2017-09-22 马达和电动助力转向装置

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JP2016-192604 2016-09-30
JP2016192604 2016-09-30

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CN112640270A (zh) * 2018-12-19 2021-04-09 日本精工株式会社 电动驱动装置和电动助力转向装置
DE102021101914A1 (de) 2021-01-28 2022-07-28 Schaeffler Technologies AG & Co. KG Stator und Verfahren zur Herstellung eines Stators

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JP7474267B2 (ja) * 2018-10-22 2024-04-24 エルジー イノテック カンパニー リミテッド モータ
JP2020162293A (ja) * 2019-03-27 2020-10-01 日本電産株式会社 バスバー装置、モータ、及びバスバー装置の製造方法
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DE102019123856A1 (de) * 2019-09-05 2021-03-11 Schaeffler Technologies AG & Co. KG Sensorbefestigung zur Temperaturmessung in einer elektrischen Maschine eines Kraftfahrzeugs
JP2021164221A (ja) * 2020-03-31 2021-10-11 日本電産株式会社 モータ
JP2021164222A (ja) * 2020-03-31 2021-10-11 日本電産株式会社 モータ
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CN112640270A (zh) * 2018-12-19 2021-04-09 日本精工株式会社 电动驱动装置和电动助力转向装置
CN112640270B (zh) * 2018-12-19 2022-02-08 日本精工株式会社 电动驱动装置和电动助力转向装置
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Also Published As

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CN109792183B (zh) 2021-12-28
CN109792183A (zh) 2019-05-21
JP2018061423A (ja) 2018-04-12
JPWO2018062006A1 (ja) 2019-07-11
JP2018061424A (ja) 2018-04-12
JP7035429B2 (ja) 2022-03-15

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