WO2019181571A1 - Motor and electric power steering device - Google Patents

Motor and electric power steering device Download PDF

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Publication number
WO2019181571A1
WO2019181571A1 PCT/JP2019/009432 JP2019009432W WO2019181571A1 WO 2019181571 A1 WO2019181571 A1 WO 2019181571A1 JP 2019009432 W JP2019009432 W JP 2019009432W WO 2019181571 A1 WO2019181571 A1 WO 2019181571A1
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WIPO (PCT)
Prior art keywords
bent
motor
connection
motor according
bending point
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PCT/JP2019/009432
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French (fr)
Japanese (ja)
Inventor
瑞貴 仁平
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日本電産株式会社
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Priority to CN201980020373.6A priority Critical patent/CN111919365B/en
Publication of WO2019181571A1 publication Critical patent/WO2019181571A1/en

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    • 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 having a bus bar having a connection terminal and connecting a stator and an external power source by the connection terminal is known (see Japanese Patent No. 6053001).
  • connection terminal When the connection terminal is connected to the control board, the connection terminal has a first connection part connected to the bus bar at the lower end and a second connection part connected to the control board at the upper end.
  • the connection terminal has a straight line portion between the first connection portion and the second connection portion.
  • an object of the present invention is to provide a motor capable of reducing the stress of a connection destination component due to thermal expansion of a connection terminal.
  • a motor includes a shaft extending along a central axis, a rotor fixed to the shaft, a stator including a conductive portion disposed radially outside or inside the rotor, and connected to the conductive portion.
  • the connection terminal has a first connection part connected to the conducting member and a second connection part connected to the control board or an external power source, and a bent part and a straight part between the first connection part and the second connection part.
  • the motor it is possible to reduce the stress of the connection destination component due to the thermal expansion of the connection terminal. Therefore, according to the electric power steering apparatus according to an embodiment of the present application, the reliability of electrical connection with a motor attached to the electric power steering apparatus can be increased.
  • FIG. 1 is a cross-sectional view showing a motor according to an embodiment.
  • FIG. 2 is a side view of the connection terminal connected to the control board.
  • FIG. 3 is a side view of a connection terminal according to a modification.
  • FIG. 4 is a side view of a connection terminal according to another modification.
  • FIG. 5 is a schematic diagram of an electric power steering apparatus according to another embodiment.
  • the central axis of the motor is C.
  • the direction in which the central axis C extends is the axial direction.
  • One along the axial direction is the upper side and the other is the lower side.
  • the vertical direction in this specification is used to specify the positional relationship, and does not limit the actual direction or positional relationship.
  • the direction of gravity is not necessarily downward.
  • a direction perpendicular to the rotation axis of the motor is referred to as a “radial direction”.
  • the direction along the arc centered on the rotation axis of the motor is called “circumferential direction”.
  • Connection a connection terminal to a connection destination component such as a control board or an external power source includes not only a case where the connection terminal is physically directly connected, but also a case where the connection terminal is indirectly connected via another component. “Bending” includes not only bending at an acute angle but also bending.
  • the motor 1 includes a shaft 31, a rotor 30, a stator 40, a housing 20, and a bus bar holder 50.
  • the shaft 31 extends along the central axis C, and is supported rotatably around the central axis C by an upper bearing (not shown) and a lower bearing 69 supported by the bearing holder.
  • the rotor 30 is fixed to the shaft 31 and rotates around the central axis C together with the shaft 31.
  • the stator 40 is disposed on the outer side in the radial direction of the rotor 30 so as to face the rotor 30.
  • the stator 40 includes a stator core 41, an insulator 42, and a coil wire 43.
  • the insulator 42 is attached to the teeth (not shown) of the stator core 41.
  • the coil wire 43 is an example of a conductive portion, is constituted by a conductive wire, and is wound around a tooth with an insulator 42 interposed.
  • the coil wire 43 drawn from the coil wire 43 wound around the stator 40 to the upper side of the stator 40 is connected to a bus bar 51 described later.
  • the housing 20 is disposed on the radially outer side of the stator 40.
  • the stator 40 is fixed to the inner peripheral surface of the housing 20 by shrink fitting or caulking.
  • the housing 20 has a bottomed cylindrical shape with the central axis C as the center.
  • the housing 20 includes a cylindrical portion 21 that extends in the axial direction, a bottom portion 23 that is positioned at the lower end of the cylindrical portion 21, and an opening portion 24 that opens upward.
  • the shape of the housing 20 is not limited to a cylindrical shape. Further, the cross section of the housing 20 may be, for example, a polygon. Further, the housing 20 may not be bottomed but may have a cylindrical shape without a bottom.
  • the bus bar holder 50 is a support member that supports the bus bar 51.
  • the bus bar holder 50 is made of a resin material.
  • the bus bar 51 is an example of a conductive member, and is connected to the coil wire 43 of the stator 40.
  • the bus bar 51 is connected to the connection terminal 70.
  • the connection terminal 70 extends upward in the axial direction and is connected to the control board 80.
  • the bus bar holder 50 may support the connection terminal 70.
  • the bus bar holder 50 has a portion that supports the inclined portion 732 of the connection terminal 70. According to this configuration, the bus bar holder 50 can receive a load generated when the connection terminal 70 is connected to the control board 80 or an external device. Therefore, the load applied to the connection portion between the bus bar 51 and the connection terminal 70 can be reduced.
  • the control board 80 is an ECU (engine control unit) board, for example, and is a board having a control circuit for controlling the operation of the automobile.
  • connection terminal 70 connected to the bus bar 51 is made of a conductive material. As shown in FIG. 2, the connection terminal 70 includes a first connection portion 71 connected to the bus bar 51, a second connection portion 72 connected to the control board 80, and between the first connection portion 71 and the second connection portion 72. Have a bent portion 73 and a straight portion 74.
  • the straight portion 74 extends in the axial direction.
  • the bent portion 73 is bent in the radial direction with respect to the straight portion 74.
  • the bent portion 73 has a first bent point 731 disposed at one end on the first connecting portion 71 side and a second bent point 739 disposed on the other end on the second connecting portion 72 side.
  • the bent portion 73 has inclined portions 732 and 734 having an angle with respect to the straight portion 74 between the first bent point 731 and the second bent point 739.
  • the bending portion 73 further has another bending point 733 between the first bending point 731 and the second bending point 739.
  • the connection terminal 70 expands in the axial direction by heat from the control board 80 and the bus bar 51 while the first connection portion 71 and the second connection portion 72 are fixed.
  • connection terminal 70 contracts in the axial direction by being cooled after thermal expansion, the contraction in the axial direction of the entire connection terminal 70 is suppressed by the extension of the bent portion 73.
  • the connection terminal 70 includes the first connection portion 71 connected to the bus bar 51 and the second connection portion 72 connected to the control board 80, and the first connection portion.
  • a bent portion 73 and a straight portion 74 are provided between 71 and the second connection portion 72.
  • the bent portion 73a of the connection terminal 70a has two other bent points 733 and 735 between the first bent point 731 and the second bent point 739. Have three inclined portions 732, 734, 736. Since the expansion of the connection terminal 70a in the axial direction is alleviated by the bent portion 73a, the stress of the control board 80 can be suppressed and the control board 80 can be prevented from being damaged.
  • the bent portion 73 b of the connection terminal 70 b is another linear portion 740 extending in a direction parallel to the straight portion 74 between the first bent point 731 and the other bent point 737. including.
  • an inclined portion 738 is provided between the other bending point 737 and the second bending point 739. Since the expansion of the connection terminal 70a in the axial direction is relieved by the bent portion 73b, the stress of the control board 80 can be suppressed and the control board 80 can be prevented from being damaged.
  • connection destination of the connection terminals 70, 70 a and 70 b is not limited to the control board 80.
  • an external power source (not shown) may be used.
  • connection terminals 70, 70a, 70b are not limited to being connected in the axial direction.
  • the connection terminals 70, 70a, 70b may be connected in the radial direction, for example.
  • the straight portion 74 extends in the radial direction of the motor 1, and the bent portions 73, 73 a, 73 b are bent in the axial direction with respect to the straight portion 74.
  • the motor 1 according to the above embodiment is not limited to the inner rotor type, but may be an outer rotor type in which the rotor is arranged outside the stator.
  • the electric power steering device 2 is mounted on the steering mechanism of the vehicle wheel 912.
  • the electric power steering device 2 is a column type power steering device that directly reduces the steering force by the power of the motor 1.
  • the electric power steering device 2 includes a motor 1, a steering shaft 914, and an axle 913.
  • the steering shaft 914 transmits the input from the steering 911 to the axle 913 having the wheels 912.
  • the power of the motor 1 is transmitted to the axle 913 via a ball screw.
  • the motor 1 employed in the column-type electric power steering device 2 is provided inside an engine room (not shown).
  • the electric power steering device 2 shown in FIG. 5 is a column type, but may be a rack type.
  • the electric power steering device 2 includes a motor 1. For this reason, the electric power steering apparatus 2 with the same effect as that of the above embodiment can be obtained.
  • the electric power steering apparatus 2 was mentioned here as an example of the usage method of the motor 1, the usage method of the motor 1 is not limited and can be used widely, such as a pump and a compressor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Power Steering Mechanism (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

[Problem] To provide a motor configured so as to reduce stress caused by a connection terminal and occurring in a component to which the connection terminal is connected. [Solution] This motor is provided with: a shaft 31 extending along a center axis; a rotor 30 affixed to the shaft 31; a stator 40 disposed radially outside or inside the rotor 30 and including a coil wire 43; a bus bar 51 connecting to the coil wire 43; and a connection terminal 70. The connection terminal 70 has: a first connection section 71 connecting to the bus bar 51; a second connection section 72 connecting to a control board 80; and a bent section 73 and a straight section 74, which are located between the first connection section 71 and the second connection section 72.

Description

モータ及び電動パワーステアリング装置Motor and electric power steering apparatus
　本発明は、モータ及び電動パワーステアリング装置に関する。 The present invention relates to a motor and an electric power steering apparatus.
　接続端子を有するバスバーを備え、接続端子によりステータと外部電源とを接続するモータが知られている（日本特許第６０５３００１号参照）。 A motor having a bus bar having a connection terminal and connecting a stator and an external power source by the connection terminal is known (see Japanese Patent No. 6053001).
日本特許第６０５３００１号明細書Japanese Patent No. 6053001
　接続端子が制御基板に接続される場合、接続端子は、下端にバスバーに接続する第１接続部と、上端に制御基板に接続される第２接続部とを有する。接続端子は、第１接続部と第２接続部との間に直線部を有する。熱により直線部が上下方向に膨張すると、第１接続部と第２接続部は固定されているため、接続端子と制御基板の半田付けの部分との間に応力が発生する。この応力により、制御基盤を破損させてしまうおそれがあった。かかる問題は、接続端子が外部電源等その他の接続先部品に接続される場合においても、同様に生じる。 When the connection terminal is connected to the control board, the connection terminal has a first connection part connected to the bus bar at the lower end and a second connection part connected to the control board at the upper end. The connection terminal has a straight line portion between the first connection portion and the second connection portion. When the linear portion expands in the vertical direction due to heat, the first connection portion and the second connection portion are fixed, and stress is generated between the connection terminal and the soldered portion of the control board. This stress may damage the control board. Such a problem also occurs when the connection terminal is connected to other connection destination components such as an external power source.
　そこで、本発明は、接続端子の熱膨張による接続先部品の応力を低減することができるモータを提供することを目的とする。 Therefore, an object of the present invention is to provide a motor capable of reducing the stress of a connection destination component due to thermal expansion of a connection terminal.
　本願の例示的な一実施形態のモータは、中心軸に沿って延びるシャフトと、シャフトに固定されるロータと、ロータの径方向外側又は内側に配され導電部を含むステータと、導電部に接続する導通部材と、接続端子とを備える。接続端子は、導通部材に接続する第１接続部、及び制御基板又は外部電源に接続する第２接続部を有し、第１接続部と第２接続部との間に屈曲部と直線部とを有する。本願の例示的な一実施形態の電動パワーステアリング装置は、上述のモータを備える。 A motor according to an exemplary embodiment of the present application includes a shaft extending along a central axis, a rotor fixed to the shaft, a stator including a conductive portion disposed radially outside or inside the rotor, and connected to the conductive portion. A conducting member and a connection terminal. The connection terminal has a first connection part connected to the conducting member and a second connection part connected to the control board or an external power source, and a bent part and a straight part between the first connection part and the second connection part. Have An electric power steering apparatus according to an exemplary embodiment of the present application includes the motor described above.
　本願の一実施形態に係るモータによれば、接続端子の熱膨張による接続先部品の応力を低減することができる。そのため、本願の一実施形態に係る電動パワーステアリング装置によれば、電動パワーステアリング装置に取り付けられるモータとの電気的接続について、信頼性を高くすることができる。 According to the motor according to one embodiment of the present application, it is possible to reduce the stress of the connection destination component due to the thermal expansion of the connection terminal. Therefore, according to the electric power steering apparatus according to an embodiment of the present application, the reliability of electrical connection with a motor attached to the electric power steering apparatus can be increased.
図１は、一実施形態のモータを示す断面図である。FIG. 1 is a cross-sectional view showing a motor according to an embodiment. 図２は、制御基板に接続された接続端子の側面図である。FIG. 2 is a side view of the connection terminal connected to the control board. 図３は、変形例に係る接続端子の側面図である。FIG. 3 is a side view of a connection terminal according to a modification. 図４は、他の変形例に係る接続端子の側面図である。FIG. 4 is a side view of a connection terminal according to another modification. 図５は、他の実施形態に係る電動パワーステアリング装置の模式図である。FIG. 5 is a schematic diagram of an electric power steering apparatus according to another embodiment.
　以下、図面を参照しながら、本発明の実施形態について説明する。なお、本発明の範囲は、以下の実施形態に限定されず、本発明の技術的思想の範囲内で任意に変更可能である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that 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.
　以下の説明において、モータの中心軸をＣとする。中心軸Ｃが延びる方向を軸方向とする。また、軸方向に沿った一方を上側、他方を下側とする。ただし、本明細書における上下方向は、位置関係を特定するために用い、実際の方向や位置関係を限定しない。重力方向は必ずしも下方向ではない。また、本明細書では、モータの回転軸に直交する方向は「径方向」と呼ぶ。モータの回転軸を中心とする円弧に沿う方向を「周方向」と呼ぶ。接続端子が制御基板や外部電源等の接続先部品に「接続する」とは、物理的に直接接続される場合だけでなく、他の部品を介在させて間接的に接続する場合も含む。「屈曲」とは、鋭角に曲がることだけでなく、湾曲することも含む。 In the following description, the central axis of the motor is C. The direction in which the central axis C extends is the axial direction. One along the axial direction is the upper side and the other is the lower side. However, the vertical direction in this specification is used to specify the positional relationship, and does not limit the actual direction or positional relationship. The direction of gravity is not necessarily downward. In this specification, a direction perpendicular to the rotation axis of the motor is referred to as a “radial direction”. The direction along the arc centered on the rotation axis of the motor is called “circumferential direction”. “Connecting” a connection terminal to a connection destination component such as a control board or an external power source includes not only a case where the connection terminal is physically directly connected, but also a case where the connection terminal is indirectly connected via another component. “Bending” includes not only bending at an acute angle but also bending.
　以下の説明で用いる図面は、特徴部分を強調する目的で、便宜上特徴となる部分を拡大して示す場合がある。よって、各構成要素の寸法及び比率は実際のものと必ずしも同じではない。 In the drawings used in the following description, for the purpose of emphasizing the feature portion, the feature portion may be shown enlarged. Therefore, the dimensions and ratios of each component are not necessarily the same as actual ones.
　（実施形態）
　図１に示すように、モータ１は、シャフト３１と、ロータ３０と、ステータ４０と、ハウジング２０と、バスバーホルダ５０と、を備える。 (Embodiment)
As shown in FIG. 1, the motor 1 includes a shaft 31, a rotor 30, a stator 40, a housing 20, and a bus bar holder 50.
　シャフト３１は、中心軸Ｃに沿って延び、ベアリングホルダに支持された上側ベアリング（図示省略）及び下側ベアリング６９により中心軸Ｃ周りを回転可能に支持される。ロータ３０は、シャフト３１に固定され、シャフト３１とともに中心軸Ｃ周りに回転する。 The shaft 31 extends along the central axis C, and is supported rotatably around the central axis C by an upper bearing (not shown) and a lower bearing 69 supported by the bearing holder. The rotor 30 is fixed to the shaft 31 and rotates around the central axis C together with the shaft 31.
　ステータ４０は、ロータ３０の径方向外側にロータ３０に対向して配置される。ステータ４０は、ステータコア４１と、インシュレータ４２と、コイル線４３と、を有する。インシュレータ４２は、ステータコア４１のティース（図示省略）に取り付けられる。コイル線４３は、導電部の一例であり、導線により構成され、インシュレータ４２を介在させてティースに巻かれる。ステータ４０に巻かれたコイル線４３からステータ４０の上方に引き出されたコイル線４３は、後述するバスバー５１に接続される。 The stator 40 is disposed on the outer side in the radial direction of the rotor 30 so as to face the rotor 30. The stator 40 includes a stator core 41, an insulator 42, and a coil wire 43. The insulator 42 is attached to the teeth (not shown) of the stator core 41. The coil wire 43 is an example of a conductive portion, is constituted by a conductive wire, and is wound around a tooth with an insulator 42 interposed. The coil wire 43 drawn from the coil wire 43 wound around the stator 40 to the upper side of the stator 40 is connected to a bus bar 51 described later.
　ハウジング２０は、ステータ４０の径方向外側に配される。ステータ４０は、ハウジング２０の内周面に焼き嵌めや加締め等により固定される。ハウジング２０は、中心軸Ｃを中心とする有底の円筒形状を有する。ハウジング２０は、軸方向に延びる筒部２１と、筒部２１の下端に位置する底部２３と、上側に開口する開口部２４とを有する。 The housing 20 is disposed on the radially outer side of the stator 40. The stator 40 is fixed to the inner peripheral surface of the housing 20 by shrink fitting or caulking. The housing 20 has a bottomed cylindrical shape with the central axis C as the center. The housing 20 includes a cylindrical portion 21 that extends in the axial direction, a bottom portion 23 that is positioned at the lower end of the cylindrical portion 21, and an opening portion 24 that opens upward.
　なお、ハウジング２０の形状は、円筒状に限られない。また、ハウジング２０の断面は、例えば多角形などであってもよい。また、ハウジング２０は、有底ではなく、底のない筒状であってもよい。 Note that the shape of the housing 20 is not limited to a cylindrical shape. Further, the cross section of the housing 20 may be, for example, a polygon. Further, the housing 20 may not be bottomed but may have a cylindrical shape without a bottom.
　バスバーホルダ５０は、バスバー５１を支持する支持部材である。バスバーホルダ５０は、樹脂材料からなる。バスバー５１は、導通部材の一例であり、ステータ４０のコイル線４３に接続される。バスバー５１は、接続端子７０に接続される。接続端子７０は、軸方向上方に延び、制御基板８０に接続される。なお、バスバーホルダ５０は、接続端子７０を支持してもよい。例えば、バスバーホルダ５０は、接続端子７０の傾斜部７３２を支持する部位を有する。この構成によると、接続端子７０を制御基板８０または外部装置に接続するときに生じる荷重をバスバーホルダ５０が受けることができる。そのため、バスバー５１と接続端子７０との接続部分にかかる荷重を低減することができる。 The bus bar holder 50 is a support member that supports the bus bar 51. The bus bar holder 50 is made of a resin material. The bus bar 51 is an example of a conductive member, and is connected to the coil wire 43 of the stator 40. The bus bar 51 is connected to the connection terminal 70. The connection terminal 70 extends upward in the axial direction and is connected to the control board 80. The bus bar holder 50 may support the connection terminal 70. For example, the bus bar holder 50 has a portion that supports the inclined portion 732 of the connection terminal 70. According to this configuration, the bus bar holder 50 can receive a load generated when the connection terminal 70 is connected to the control board 80 or an external device. Therefore, the load applied to the connection portion between the bus bar 51 and the connection terminal 70 can be reduced.
　制御基板８０は、例えばＥＣＵ（エンジンコントロールユニット）基板であり、自動車の運転制御を行う制御回路を有する基板である。 The control board 80 is an ECU (engine control unit) board, for example, and is a board having a control circuit for controlling the operation of the automobile.
　バスバー５１に接続された接続端子７０は、導電性材料からなる。図２に示すように、接続端子７０は、バスバー５１に接続する第１接続部７１と、制御基板８０に接続する第２接続部７２と、第１接続部７１及び第２接続部７２の間に屈曲部７３と直線部７４とを有する。 The connection terminal 70 connected to the bus bar 51 is made of a conductive material. As shown in FIG. 2, the connection terminal 70 includes a first connection portion 71 connected to the bus bar 51, a second connection portion 72 connected to the control board 80, and between the first connection portion 71 and the second connection portion 72. Have a bent portion 73 and a straight portion 74.
　直線部７４は、軸方向に延びる。屈曲部７３は、直線部７４に対し径方向に屈曲する。屈曲部７３は、第１接続部７１側の一端に配される第１屈曲点７３１と、第２接続部７２側の他端に配される第２屈曲点７３９とを有する。屈曲部７３は、第１屈曲点７３１と第２屈曲点７３９との間に、直線部７４に対し角度を有する傾斜部７３２，７３４を有する。屈曲部７３は更に、第１屈曲点７３１と第２屈曲点７３９との間に、他の屈曲点７３３を有する。接続端子７０は、第１接続部７１と第２接続部７２が固定されつつ、制御基板８０やバスバー５１からの熱により軸方向に膨張する。しかし、屈曲部７３の屈曲により、接続端子７０全体の軸方向における膨張が緩和されるため、接続端子７０による制御基板８０への圧迫が抑制される。このため、接続端子７０の熱膨張による制御基板８０の応力が低減され、制御基板８０の破損を防ぐことができる。逆に、熱膨張後冷却されることより接続端子７０が軸方向に収縮した場合、屈曲部７３の伸長により、接続端子７０全体の軸方向の収縮が抑えられる。 The straight portion 74 extends in the axial direction. The bent portion 73 is bent in the radial direction with respect to the straight portion 74. The bent portion 73 has a first bent point 731 disposed at one end on the first connecting portion 71 side and a second bent point 739 disposed on the other end on the second connecting portion 72 side. The bent portion 73 has inclined portions 732 and 734 having an angle with respect to the straight portion 74 between the first bent point 731 and the second bent point 739. The bending portion 73 further has another bending point 733 between the first bending point 731 and the second bending point 739. The connection terminal 70 expands in the axial direction by heat from the control board 80 and the bus bar 51 while the first connection portion 71 and the second connection portion 72 are fixed. However, since the expansion of the entire connection terminal 70 in the axial direction is alleviated by the bending of the bent portion 73, the pressure on the control board 80 by the connection terminal 70 is suppressed. For this reason, the stress of the control board 80 due to the thermal expansion of the connection terminal 70 is reduced, and the damage of the control board 80 can be prevented. On the contrary, when the connection terminal 70 contracts in the axial direction by being cooled after thermal expansion, the contraction in the axial direction of the entire connection terminal 70 is suppressed by the extension of the bent portion 73.
　以上のように、上記実施形態に係るモータ１においては、接続端子７０は、バスバー５１に接続する第１接続部７１及び制御基板８０に接続する第２接続部７２を有し、第１接続部７１と第２接続部７２との間に屈曲部７３と直線部７４とを有する。このため、接続端子７０の熱膨張による制御基板８０の応力を低減し、制御基板８０の破損を防ぐことができる。 As described above, in the motor 1 according to the embodiment, the connection terminal 70 includes the first connection portion 71 connected to the bus bar 51 and the second connection portion 72 connected to the control board 80, and the first connection portion. A bent portion 73 and a straight portion 74 are provided between 71 and the second connection portion 72. For this reason, the stress of the control board 80 due to the thermal expansion of the connection terminal 70 can be reduced, and the damage of the control board 80 can be prevented.
　（変形例）
　（１）　図３に示すように、接続端子７０ａの屈曲部７３ａは、第１屈曲点７３１と第２屈曲点７３９との間に二つの他の屈曲点７３３，７３５を有し、各屈曲点を結ぶ三つの傾斜部７３２，７３４，７３６を有する。屈曲部７３ａにより、接続端子７０ａの軸方向への膨張が緩和されるため、制御基板８０の応力を抑え、制御基板８０の破損を防ぐことができる。 (Modification)
(1) As shown in FIG. 3, the bent portion 73a of the connection terminal 70a has two other bent points 733 and 735 between the first bent point 731 and the second bent point 739. Have three inclined portions 732, 734, 736. Since the expansion of the connection terminal 70a in the axial direction is alleviated by the bent portion 73a, the stress of the control board 80 can be suppressed and the control board 80 can be prevented from being damaged.
　（２）　図４に示すように、接続端子７０ｂの屈曲部７３ｂは、第１屈曲点７３１と他の屈曲点７３７との間において、直線部７４に対し平行な方向に延びる他の直線部７４０を含む。また、他の屈曲点７３７と第２屈曲点７３９との間には、傾斜部７３８を有する。屈曲部７３ｂにより、接続端子７０ａの軸方向への膨張が緩和されるため、制御基板８０の応力を抑え、制御基板８０の破損を防ぐことができる。 (2) As shown in FIG. 4, the bent portion 73 b of the connection terminal 70 b is another linear portion 740 extending in a direction parallel to the straight portion 74 between the first bent point 731 and the other bent point 737. including. In addition, an inclined portion 738 is provided between the other bending point 737 and the second bending point 739. Since the expansion of the connection terminal 70a in the axial direction is relieved by the bent portion 73b, the stress of the control board 80 can be suppressed and the control board 80 can be prevented from being damaged.
　（３）　接続端子７０，７０ａ，７０ｂの接続先は制御基板８０に限定されない。例えば、外部電源（図示省略）であってもよい。 (3) The connection destination of the connection terminals 70, 70 a and 70 b is not limited to the control board 80. For example, an external power source (not shown) may be used.
　（４）　接続端子７０，７０ａ，７０ｂは、軸方向に接続されることに限定されない。接続端子７０，７０ａ，７０ｂは、例えば、径方向に接続されていてもよい。この場合、直線部７４は、モータ１の径方向に延び、屈曲部７３、７３ａ、７３ｂは、直線部７４に対し軸方向に屈曲する。 (4) The connection terminals 70, 70a, 70b are not limited to being connected in the axial direction. The connection terminals 70, 70a, 70b may be connected in the radial direction, for example. In this case, the straight portion 74 extends in the radial direction of the motor 1, and the bent portions 73, 73 a, 73 b are bent in the axial direction with respect to the straight portion 74.
　（５）　上記実施形態に係るモータ１は、インナーロータ型に限定されず、ステータの外側にロータを配するアウターロータ型であってもよい。 (5) The motor 1 according to the above embodiment is not limited to the inner rotor type, but may be an outer rotor type in which the rotor is arranged outside the stator.
　（その他実施形態）
　図５を参照して、モータ１を電動パワーステアリング装置２に搭載した例について説明する。 (Other embodiments)
An example in which the motor 1 is mounted on the electric power steering device 2 will be described with reference to FIG.
　電動パワーステアリング装置２は、自動車の車輪９１２の操舵機構に搭載される。電動パワーステアリング装置２は、モータ１の動力により操舵力を直接的に軽減するコラム式のパワーステアリング装置である。電動パワーステアリング装置２は、モータ１と、操舵軸９１４と、車軸９１３と、を備える。 The electric power steering device 2 is mounted on the steering mechanism of the vehicle wheel 912. The electric power steering device 2 is a column type power steering device that directly reduces the steering force by the power of the motor 1. The electric power steering device 2 includes a motor 1, a steering shaft 914, and an axle 913.
　操舵軸９１４は、ステアリング９１１からの入力を、車輪９１２を有する車軸９１３に伝える。モータ１の動力は、ボールねじを介して、車軸９１３に伝えられる。コラム式の電動パワーステアリング装置２に採用されるモータ１は、エンジンルーム（図示せず）の内部に設けられる。なお、図５に示す電動パワーステアリング装置２は、コラム式であるが、ラック式であってもよい。 The steering shaft 914 transmits the input from the steering 911 to the axle 913 having the wheels 912. The power of the motor 1 is transmitted to the axle 913 via a ball screw. The motor 1 employed in the column-type electric power steering device 2 is provided inside an engine room (not shown). The electric power steering device 2 shown in FIG. 5 is a column type, but may be a rack type.
　電動パワーステアリング装置２は、モータ１を備える。このため、上記実施形態と同様の効果を奏する電動パワーステアリング装置２が得られる。 The electric power steering device 2 includes a motor 1. For this reason, the electric power steering apparatus 2 with the same effect as that of the above embodiment can be obtained.
　なお、ここでは、モータ１の使用方法の一例として電動パワーステアリング装置２を挙げたが、モータ１の使用方法は限定されず、ポンプ、コンプレッサなど広範囲に使用可能である。 In addition, although the electric power steering apparatus 2 was mentioned here as an example of the usage method of the motor 1, the usage method of the motor 1 is not limited and can be used widely, such as a pump and a compressor.
　上述した実施形態及び変形例は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は上記した実施の形態ではなくて請求の範囲によって示され、請求の範囲と均等の意味及び範囲内でのすべての変更が含まれることが意図される。 The above-described embodiments and modifications should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above-described embodiment but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.
１…モータ、２…電動パワーステアリング装置、２０…ハウジング、２１…筒部、２３…底部、２４…開口部、３０…ロータ、３１…シャフト、４０…ステータ、４１…ステータコア、４２…インシュレータ、４３…コイル線、５０…バスバーホルダ、５１…バスバー、６９…下側ベアリング、７０，７０ａ，７０ｂ，７００…接続端子、７１，７１０…第１接続部、７２，７２０…第２接続部、７３，７３ａ，７３ｂ…屈曲部、７４，７４０…直線部、８０，８００…制御基板、７３１…第１屈曲点、７３２，７３４，７３６，７３８…傾斜部、７３３，７３５，７３７…屈曲点、７３９…第２屈曲点、９１１…ステアリング、９１２…車輪、９１３…車軸、９１４…操舵軸、Ｃ…中心軸 DESCRIPTION OF SYMBOLS 1 ... Motor, 2 ... Electric power steering apparatus, 20 ... Housing, 21 ... Tube part, 23 ... Bottom part, 24 ... Opening part, 30 ... Rotor, 31 ... Shaft, 40 ... Stator, 41 ... Stator core, 42 ... Insulator, 43 ... Coil wire, 50 ... Bus bar holder, 51 ... Bus bar, 69 ... Lower bearing, 70, 70a, 70b, 700 ... Connection terminal, 71, 710 ... First connection part, 72, 720 ... Second connection part, 73, 73a, 73b ... bent portion, 74, 740 ... straight line portion, 80, 800 ... control board, 731 ... first bent point, 732, 734, 736, 738 ... inclined portion, 733, 735, 737 ... bent point, 739 ... Second bending point, 911 ... steering, 912 ... wheel, 913 ... axle, 914 ... steering axis, C ... center axis

Claims (11)

  1. 　中心軸に沿って延びるシャフトと、
    　前記シャフトに固定されるロータと、
    　前記ロータの径方向外側又は内側に配され、導電部を含むステータと、
    　前記導電部に接続する導通部材と、
    　前記導通部材に接続する第１接続部、及び制御基板又は外部電源に接続する第２接続部を有し、前記第１接続部と前記第２接続部との間に屈曲部と直線部とを有する接続端子と、を備える、モータ。     A shaft extending along the central axis;
    A rotor fixed to the shaft;
    A stator that is disposed radially outside or inside the rotor and includes a conductive portion;
    A conductive member connected to the conductive portion;
    A first connecting portion connected to the conductive member; and a second connecting portion connected to a control board or an external power source; and a bent portion and a straight portion between the first connecting portion and the second connecting portion. And a connecting terminal.
  2. 　前記直線部は、前記モータの軸方向に延び、
    　前記屈曲部は、前記直線部に対し前記モータの径方向に屈曲する、請求項１に記載のモータ。     The linear portion extends in the axial direction of the motor,
    The motor according to claim 1, wherein the bent portion is bent in a radial direction of the motor with respect to the linear portion.
  3. 　前記直線部は、前記モータの径方向に延び、
    　前記屈曲部は、前記直線部に対し前記モータの軸方向に屈曲する、請求項１に記載のモータ。     The linear portion extends in a radial direction of the motor;
    The motor according to claim 1, wherein the bent portion is bent in the axial direction of the motor with respect to the linear portion.
  4. 　前記屈曲部は、
    　前記第１接続部側の一端に配される第１屈曲点と、前記第２接続部側の他端に配される第２屈曲点とを有し、
    　前記第１屈曲点と前記第２屈曲点との間に前記直線部に対し角度を有する一以上の傾斜部を有する、請求項１から３のいずれかに記載のモータ。     The bent portion is
    A first bending point disposed at one end of the first connection portion side and a second bending point disposed at the other end of the second connection portion side;
    4. The motor according to claim 1, further comprising at least one inclined portion having an angle with respect to the linear portion between the first bending point and the second bending point. 5.
  5. 　前記屈曲部は、前記第１屈曲点と前記第２屈曲点との間に一以上の他の屈曲点を有する、請求項４に記載のモータ。 The motor according to claim 4, wherein the bent portion has one or more other bent points between the first bent point and the second bent point.
  6. 　前記屈曲部は、前記第１屈曲点と前記一以上の他の屈曲点との間において、前記直線部に対し平行な方向に延びる他の直線部を含む、請求項５に記載のモータ。 The motor according to claim 5, wherein the bent portion includes another straight portion extending in a direction parallel to the straight portion between the first bent point and the one or more other bent points.
  7. 　前記屈曲部は、
    　前記第１屈曲点と前記第２屈曲点との間に一つの他の屈曲点を有し、
    　各屈曲点を結ぶ二つの傾斜部を有する、請求項５に記載のモータ。     The bent portion is
    Having one other bending point between the first bending point and the second bending point;
    The motor according to claim 5, wherein the motor has two inclined portions connecting each bending point.
  8. 　前記屈曲部は、
    　前記第１屈曲点と前記第２屈曲点との間に二つの他の屈曲点を有し、
    　各屈曲点を結ぶ三つの傾斜部を有する、請求項５に記載のモータ。     The bent portion is
    Having two other bending points between the first bending point and the second bending point;
    The motor according to claim 5, comprising three inclined portions connecting the respective bending points.
  9. 　前記屈曲部は、前記第１接続部に接続する、請求項１から８のいずれかに記載のモータ。 The motor according to any one of claims 1 to 8, wherein the bent portion is connected to the first connection portion.
  10. 　前記直線部は、前記第２接続部に接続する、請求項１から９のいずれかに記載のモータ。 The motor according to any one of claims 1 to 9, wherein the straight line portion is connected to the second connection portion.
  11. 　請求項１から１０のいずれかに記載のモータを備える、電動パワーステアリング装置。 An electric power steering apparatus comprising the motor according to any one of claims 1 to 10.
PCT/JP2019/009432 2018-03-23 2019-03-08 Motor and electric power steering device WO2019181571A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010030489A (en) * 2008-07-30 2010-02-12 Hitachi Ltd Electric power steering control device, and electric power steering device
JP2016178774A (en) * 2015-03-19 2016-10-06 株式会社ジェイテクト Control unit and motor unit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6135982B2 (en) * 2013-01-17 2017-05-31 日本電産株式会社 motor
JP6569306B2 (en) * 2014-09-30 2019-09-04 日本電産株式会社 motor
JP6578642B2 (en) * 2014-09-30 2019-09-25 日本電産株式会社 motor
JP6287784B2 (en) * 2014-11-28 2018-03-07 日本電産株式会社 motor
DE102015225088A1 (en) * 2014-12-26 2016-06-30 Nidec Corporation Engine and method of making same
JP6589336B2 (en) * 2015-03-30 2019-10-16 日本電産株式会社 Motor and in-vehicle device
JP6596884B2 (en) * 2015-03-31 2019-10-30 日本電産株式会社 motor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010030489A (en) * 2008-07-30 2010-02-12 Hitachi Ltd Electric power steering control device, and electric power steering device
JP2016178774A (en) * 2015-03-19 2016-10-06 株式会社ジェイテクト Control unit and motor unit

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