JP2020178476A

JP2020178476A - Stator, motor, manufacturing method of stator, and insulation sheet

Info

Publication number: JP2020178476A
Application number: JP2019080296A
Authority: JP
Inventors: 大祐出口; Daisuke Deguchi; 敬史瀬口; Takafumi Seguchi; 拓也河合; Takuya Kawai
Original assignee: Nidec Corp
Current assignee: Nidec Corp
Priority date: 2019-04-19
Filing date: 2019-04-19
Publication date: 2020-10-29
Also published as: CN111835115B; CN111835115A

Abstract

To provide an insulation sheet in which loosening of binding of a conductor is restrained at the coil end of a stator.SOLUTION: A stator includes a stator core, multiple coil parts, and an insulation sheet. The insulation sheet has a pair of insulated surface parts, and a leg 1 interconnecting the insulated surface parts. Each insulated surface part insulates the coil ends of different coil parts provided across different slots of the stator core, at both ends of the stator in the axial direction. One side end in the second direction of the insulated surface part includes an inclined edge section 2031. In a state where the insulation sheet is unfolded planarly, the inclined edge section 2031 extends from the second direction one side end, at the end on the opposite side to the leg 1 in the first direction of the insulated surface part and inclines to the second direction one side. Furthermore, in the second direction, at least a part of the inclined edge section 2031 is provided closer to the second direction one side than the leg 1.SELECTED DRAWING: Figure 4B

Description

本発明は、ステータ、モータ、ステータの製造方法、及び絶縁シートに関する。 The present invention relates to a stator, a motor, a method for manufacturing a stator, and an insulating sheet.

電気自動車、ハイブリッド車などに搭載される車両用の三相モータでは、ステータに設けられたコイル部のコイルエンド間を絶縁するため、特許文献１のように、隣り合うコイルエンド間にいわゆる相間絶縁紙が設けられる。 In a three-phase motor for a vehicle mounted on an electric vehicle, a hybrid vehicle, etc., in order to insulate between the coil ends of the coil portion provided on the stator, so-called interphase insulation is performed between adjacent coil ends as in Patent Document 1. Paper is provided.

ところで、コイル部がステータに設けられる工程は、自動化されており、カセットインサータ工法などが採用されている。カセットインサータ工法では、たとえば、（１）六角形状に巻いた導線をステータコアのスロットに挿入し、（２）隣り合うコイルエンド間に、特許文献１のように長方形状の相間絶縁紙を挟んだ後、（３）モータの軸方向長さをより短くするために、コイルエンドを軸方向のステータコア側に押圧する。そして、（４）コイルエンドで導線がばらけないようにするため、コイルエンドを紐などの結束部材で縛って導線を結束する。 By the way, the process of providing the coil portion on the stator is automated, and a cassette inserter method or the like is adopted. In the cassette inserter method, for example, (1) a hexagonally wound lead wire is inserted into a slot of a stator core, and (2) a rectangular interphase insulating paper as in Patent Document 1 is sandwiched between adjacent coil ends. , (3) The coil end is pressed toward the stator core in the axial direction in order to shorten the axial length of the motor. Then, (4) in order to prevent the wire from coming apart at the coil end, the coil end is tied with a binding member such as a string to bind the wire.

特開２００８−１４１９２１号公報Japanese Unexamined Patent Publication No. 2008-141921

しかしながら、コイルエンド間の相間絶縁紙は、結束される際、押圧された後に曲がった状態から平らに戻ろうと反発する。そのため、コイルエンドの結束の際、結束部材と導線との間の相間絶縁紙が反発によって結束部材を押すことにより、結束部材と導線と間に隙間が生じ、コイルエンドでの導線の結束が緩む虞がある。 However, when bound, the interphase insulating paper between the coil ends repels from being bent and then flattened after being pressed. Therefore, when the coil end is bound, the interphase insulating paper between the binding member and the lead wire pushes the binding member due to repulsion, so that a gap is created between the binding member and the lead wire, and the binding of the lead wire at the coil end is loosened. There is a risk.

本発明は、ステータのコイルエンドでの導線の結束の緩みを抑制することを目的とする。 An object of the present invention is to suppress loosening of the binding of the conducting wire at the coil end of the stator.

本発明の例示的なステータは、周方向に並ぶ複数のスロットが径方向内端部に設けられた環状のステータコアと、異なる前記スロット間を跨いで設けられた複数のコイル部と、異なる前記コイル部間を電気的に絶縁する絶縁シートと、を備える。前記絶縁シートは、前記ステータの軸方向の両端部において異なる前記コイル部の前記スロットから外部に突出するコイルエンド間を絶縁する一対の絶縁面部と、前記スロット内に設けられて前記絶縁面部同士を繋ぐ脚部と、を有する。前記絶縁シートが平面状に展開された状態において、前記脚部は、第１方向に延びる。前記絶縁面部は、第１方向、及び該第１方向と垂直な第２方向に広がる。前記絶縁面部の第１方向端部には、前記脚部の第１方向端部が接続される。前記絶縁面部の第１方向における前記脚部側の端部での第２方向一方側端と前記絶縁面部の第１方向における前記脚部とは反対側の端部での第２方向一方側端とを繋ぐ前記絶縁面部の第２方向一方側端部は、傾斜縁部を含む。前記傾斜縁部は、前記絶縁面部の第１方向における前記脚部とは反対側の端部での第２方向一方側端部から延びるとともに、第１方向における前記脚部側に向かうにつれて第２方向一方側に傾く。第２方向において、前記傾斜縁部の少なくとも一部は、前記脚部よりも第２方向一方側に設けられる。 An exemplary stator of the present invention includes an annular stator core in which a plurality of slots arranged in the circumferential direction are provided at the inner end in the radial direction, a plurality of coil portions provided across different slots, and different coils. An insulating sheet that electrically insulates the parts is provided. The insulating sheet is provided with a pair of insulating surface portions that insulate between coil ends protruding outward from the slots of the coil portions that are different at both ends in the axial direction of the stator, and the insulating surface portions provided in the slots. It has a leg to connect with. In the state where the insulating sheet is developed in a plane, the legs extend in the first direction. The insulating surface portion extends in a first direction and a second direction perpendicular to the first direction. The first-direction end of the leg is connected to the first-direction end of the insulating surface. One side end in the second direction at the end on the leg side in the first direction of the insulating surface portion and one side end in the second direction at the end opposite to the leg portion in the first direction of the insulating surface portion. The second-direction one-sided end portion of the insulating surface portion connecting with the insulating surface portion includes an inclined edge portion. The inclined edge portion extends from one side end portion in the second direction at an end portion of the insulating surface portion opposite to the leg portion in the first direction, and is second toward the leg portion side in the first direction. Tilt to one side in the direction. In the second direction, at least a part of the inclined edge portion is provided on one side of the second direction with respect to the leg portion.

また、本発明の例示的なモータは、中心軸を中心にして回転可能なロータと、前記ロータを駆動する上記のステータと、を備える。 Further, the exemplary motor of the present invention includes a rotor that can rotate about a central axis and the above-mentioned stator that drives the rotor.

また、本発明の例示的なステータの製造方法は、周方向に並ぶ複数のスロットが径方向内端部に設けられた環状のステータコアに複数のコイル部が設けられたステータの製造方法である。ステータの製造方法は、異なる前記スロット間を跨いで前記コイル部が設けられるステップと、前記ステータの軸方向の両端部において異なる前記コイル部の前記スロットから外部に突出するコイルエンド間に、該コイルエンド間を電気的に絶縁する絶縁シートの絶縁面部が設けられるステップと、前記コイルエンド間に前記絶縁面部が設けられた前記コイルエンドを軸方向に押圧するステップと、を備える。前記絶縁面部が設けられるステップにおいて、前記絶縁面部の軸方向端は、前記コイルエンドの軸方向端よりも前記ステータコア側に位置する。 Further, the exemplary method for manufacturing a stator of the present invention is a method for manufacturing a stator in which a plurality of coil portions are provided on an annular stator core in which a plurality of slots arranged in the circumferential direction are provided at the inner end portion in the radial direction. The method for manufacturing the stator is a method of manufacturing the coil between a step in which the coil portion is provided straddling the different slots and a coil end projecting outward from the slot of the different coil portion at both ends in the axial direction of the stator. It includes a step of providing an insulating surface portion of an insulating sheet that electrically insulates between the ends, and a step of axially pressing the coil end provided with the insulating surface portion between the coil ends. In the step where the insulating surface portion is provided, the axial end of the insulating surface portion is located closer to the stator core than the axial end of the coil end.

また、本発明の例示的な絶縁シートは、周方向に並ぶ複数のスロットが径方向内端部に設けられた環状のステータコアと、異なる前記スロット間を跨いで設けられる複数のコイル部と、を有するステータに取り付けられる。異なる前記コイル部間を電気的に絶縁するための絶縁シートは、前記ステータの軸方向の両端部において異なる前記コイル部の前記スロットから外部に突出するコイルエンド間を絶縁するための１対の左右対称な絶縁面部と、前記スロット内に設けて前記絶縁面部同士を繋ぐための脚部と、を有する。前記脚部は、第１方向に延びる。前記絶縁面部は、第１方向、及び該第１方向と垂直な第２方向に広がる。前記絶縁面部の第１方向端部には、前記脚部の第１方向端部が接続される。前記絶縁面部の第１方向における前記脚部側の端部での第２方向一方側端と前記絶縁面部の第１方向における前記脚部とは反対側の端部での第２方向一方側端とを繋ぐ前記絶縁面部の第２方向一方側端部は、傾斜縁部を含む。前記傾斜縁部は、前記絶縁面部の第１方向における前記脚部とは反対側の端部での第２方向一方側端部から延びるとともに、第１方向における前記脚部側に向かうにつれて第２方向一方側に傾く。第２方向において、前記傾斜縁部の少なくとも一部は、前記脚部よりも第２方向一方側に設けられる。 Further, in the exemplary insulating sheet of the present invention, an annular stator core having a plurality of slots arranged in the circumferential direction provided at the inner end portion in the radial direction and a plurality of coil portions provided straddling the different slots are provided. It is attached to the stator that has. The insulating sheet for electrically insulating the different coil portions is a pair of left and right insulating sheets for insulating the coil ends protruding outward from the slots of the different coil portions at both ends in the axial direction of the stator. It has a symmetrical insulating surface portion and a leg portion provided in the slot for connecting the insulating surface portions to each other. The legs extend in the first direction. The insulating surface portion extends in a first direction and a second direction perpendicular to the first direction. The first-direction end of the leg is connected to the first-direction end of the insulating surface. One side end in the second direction at the end on the leg side in the first direction of the insulating surface portion and one side end in the second direction at the end opposite to the leg portion in the first direction of the insulating surface portion. The second-direction one-sided end portion of the insulating surface portion connecting with the insulating surface portion includes an inclined edge portion. The inclined edge portion extends from one side end portion in the second direction at an end portion of the insulating surface portion opposite to the leg portion in the first direction, and is second toward the leg portion side in the first direction. Tilt to one side in the direction. In the second direction, at least a part of the inclined edge portion is provided on one side of the second direction with respect to the leg portion.

本発明の例示的なステータ、モータ、ステータの製造方法、及び絶縁シートによれば、コイルエンドでの導線の結束の緩みを抑制することができる。 According to the exemplary stator, motor, stator manufacturing method, and insulating sheet of the present invention, loosening of the binding of the lead wire at the coil end can be suppressed.

図１は、実施形態に係る電動駆動装置の断面図である。FIG. 1 is a cross-sectional view of the electric drive device according to the embodiment. 図２は、ステータの軸方向一方側端部の斜視図である。FIG. 2 is a perspective view of one end of the stator in the axial direction. 図３は、ステータの断面斜視図である。FIG. 3 is a cross-sectional perspective view of the stator. 図４Ａは、平面状に展開された状態の実施例に係る絶縁シートの平面図である。FIG. 4A is a plan view of the insulating sheet according to the embodiment in the state of being developed in a plane. 図４Ｂは、実施例に係る絶縁面部の平面図である。FIG. 4B is a plan view of the insulating surface portion according to the embodiment. 図５Ａは、平面状に展開された状態の変形例に係る絶縁シートの平面図である。FIG. 5A is a plan view of the insulating sheet according to the modified example in the state of being developed in a plane. 図５Ｂは、変形例に係る絶縁面部の平面図である。FIG. 5B is a plan view of the insulating surface portion according to the modified example. 図６は、ステータの製造方法の一例を説明するためのフローチャートである。FIG. 6 is a flowchart for explaining an example of a method for manufacturing a stator. 図７は、ステータの製造工程において成型されるコイル部の一例である。FIG. 7 is an example of a coil portion molded in the stator manufacturing process. 図８は、ステータの製造工程においてコイルエンドが押圧される前のステータの軸方向一方側端部の一例である。FIG. 8 is an example of an axial one-sided end of the stator before the coil end is pressed in the stator manufacturing process.

以下に図面を参照して例示的な実施形態を説明する。 An exemplary embodiment will be described below with reference to the drawings.

なお、本明細書では、電動駆動装置７００において、モータ１００の中心軸ＣＡと平行な方向を「軸方向」と呼ぶ。軸方向のうち、後述する第２シャフト１１０ｂから第１シャフト１１０ａへの向きを「軸方向一方」と呼び、第１シャフト１１０ａから第２シャフト１１０ｂへの向きを「軸方向他方」と呼ぶ。各々の構成要素において、軸方向一方側における端部を「軸方向一方側端部」と呼ぶ。さらに、軸方向他方側における端部を「軸方向他方側端部」と呼ぶ。 In the present specification, in the electric drive device 700, the direction parallel to the central axis CA of the motor 100 is referred to as "axial direction". Of the axial directions, the direction from the second shaft 110b to the first shaft 110a, which will be described later, is referred to as "one in the axial direction", and the direction from the first shaft 110a to the second shaft 110b is referred to as "the other in the axial direction". In each component, the end on one side in the axial direction is referred to as the "one side end in the axial direction". Further, the end portion on the other side in the axial direction is referred to as the "end portion on the other side in the axial direction".

また、中心軸ＣＡに直交する方向を「径方向」と呼び、中心軸ＣＡを中心とする回転方向を「周方向」と呼ぶ。径方向のうち、中心軸ＣＡへと近づく向きを「径方向内方」と呼び、中心軸ＣＡから離れる向きを「径方向外方」と呼ぶ。各々の構成要素において、径方向内方側における端部を「径方向内端部」と呼ぶ。さらに、径方向外方側における端部を「径方向外端部」と呼ぶ。また、各々の構成要素の側面において、径方向内方を向く側面を「径方向内側面」と呼び、径方向外方を向く側面を「径方向外側面」と呼ぶ。 Further, the direction orthogonal to the central axis CA is referred to as "diameter direction", and the direction of rotation about the central axis CA is referred to as "circumferential direction". Of the radial directions, the direction closer to the central axis CA is called "diametrically inward", and the direction away from the central axis CA is called "diametrically outward". In each component, the end on the inner side in the radial direction is referred to as the "inner end in the radial direction". Further, the end portion on the outer side in the radial direction is referred to as the "outer end portion in the radial direction". Further, on the side surface of each component, the side surface facing inward in the radial direction is referred to as "diameter inner surface", and the side surface facing outward in the radial direction is referred to as "diameter outer surface".

また、本明細書では、後述する絶縁シート１２３を平面状に展開した状態において、脚部１が延びる方向を「第１方向ｄｘ」と呼び、板状の絶縁面部２と平行であり且つ第１方向ｄｘと垂直な方向を「第２方向ｄｙ」と呼ぶ。 Further, in the present specification, the direction in which the leg portion 1 extends in the state where the insulating sheet 123 described later is developed in a plane shape is referred to as "first direction dx", and is parallel to the plate-shaped insulating surface portion 2 and is the first. The direction perpendicular to the direction dx is called "second direction dy".

また、本明細書において、「環状」は、中心軸ＣＡを中心とする周方向の全周に渡って切れ目の無く連続的に一繋がりとなる形状のほか、中心軸ＣＡを中心とする全周の一部に切れ目を有する円弧状を含む。 Further, in the present specification, the "annular" has a shape of being continuously connected without a break over the entire circumference in the circumferential direction centered on the central axis CA, and the entire circumference centered on the central axis CA. Includes an arc shape with a cut in a part of.

なお、以上に説明した事項は、実際の機器に組み込まれた場合において厳密に適用されるものではない。 It should be noted that the matters described above are not strictly applied when incorporated into an actual device.

＜１．実施形態＞
＜１−１．電動駆動装置＞
実施形態に係る電動駆動装置７００は、ハイブリッド自動車（ＨＥＶ）、プラグインハイブリッド自動車（ＰＨＶ）、電気自動車（ＥＶ）などのモータ１００を駆動源とする車両に搭載され、該車両の車輪を回転駆動する駆動源として使用される。図１は、実施形態に係る電動駆動装置７００の断面図である。なお、図１は、モータ１００の中心軸ＣＡを含む仮想の平面で電動駆動装置７００を切断した場合の断面構造を示している。 <1. Embodiment>
<1-1. Electric drive device>
The electric drive device 700 according to the embodiment is mounted on a vehicle having a motor 100 as a drive source, such as a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHV), and an electric vehicle (EV), and rotationally drives the wheels of the vehicle. Used as a drive source. FIG. 1 is a cross-sectional view of the electric drive device 700 according to the embodiment. Note that FIG. 1 shows a cross-sectional structure when the electric drive device 700 is cut on a virtual plane including the central axis CA of the motor 100.

図１に示すように、電動駆動装置７００は、モータ１００と、減速装置２００と、差動装置（図示省略）と、ハウジング４００と、を備える。ハウジング４００は、モータ１００を収容するモータハウジング４０１と、減速装置２００を収容する減速ハウジング４０２と、差動装置を収容する差動ハウジング（図示省略）と、を有する。モータ１００は、三相交流で駆動する。減速装置２００は、モータ１００に接続され、モータ１００から伝達されるトルクを所定の減速比で増大させて差動装置に伝達する。差動装置は、減速装置２００を介してモータ１００に接続され、減速装置２００から伝達されたトルクを車輪に伝達する。 As shown in FIG. 1, the electric drive device 700 includes a motor 100, a speed reducer 200, a differential device (not shown), and a housing 400. The housing 400 includes a motor housing 401 that houses the motor 100, a speed reduction housing 402 that houses the speed reducer 200, and a differential housing (not shown) that houses the differential device. The motor 100 is driven by three-phase alternating current. The speed reducing device 200 is connected to the motor 100, and the torque transmitted from the motor 100 is increased by a predetermined reduction ratio and transmitted to the differential device. The differential device is connected to the motor 100 via the speed reducer 200, and transmits the torque transmitted from the speed reducer 200 to the wheels.

＜１−２．モータ＞
モータ１００は、図１に示すように、ロータ１１と、ステータ１２と、を備える。 <1-2. Motor>
As shown in FIG. 1, the motor 100 includes a rotor 11 and a stator 12.

ロータ１１は、ステータ１２よりも径方向内方に設けられ、中心軸ＣＡを中心にして周方向に回転可能である。ロータ１１は、シャフト１１０と、ロータコア１１１と、マグネット１１２と、を有する。 The rotor 11 is provided inward in the radial direction with respect to the stator 12, and can rotate in the circumferential direction about the central axis CA. The rotor 11 has a shaft 110, a rotor core 111, and a magnet 112.

シャフト１１０は、ロータ１１の回転軸である。シャフト１１０は、ベアリング（符号省略）を介してモータハウジング４０１により回転可能に支持される。シャフト１１０は、第１シャフト１１０ａと、第２シャフト１１０ｂと、第１ギア部１１０ｃと、を有する。第１シャフト１１０ａ及び第２シャフト１１０ｂは、軸方向に延びる中空の筒状である。第１シャフト１１０ａの軸方向他方側端部には、第２シャフト１１０ｂの軸方向一方側端部が接続される。第１ギア部１１０ｃは、減速装置２００の第２ギア部２１０と噛み合う歯車であり、モータ１００の駆動力を減速装置２００に伝達する。第１ギア部１１０ｃは、第２シャフト１１０ｂ径方向外側面に設けられる。第２シャフト１１０ｂは、モータハウジング４０１から軸方向他方に突出する。そのため、第２シャフト１１０ｂの軸方向他方側の部分と第１ギア部１１０ｃとは、減速ハウジング４０２内に収容される。 The shaft 110 is a rotation shaft of the rotor 11. The shaft 110 is rotatably supported by the motor housing 401 via bearings (reference numerals omitted). The shaft 110 includes a first shaft 110a, a second shaft 110b, and a first gear portion 110c. The first shaft 110a and the second shaft 110b have a hollow tubular shape extending in the axial direction. An axially one-sided end of the second shaft 110b is connected to the axially opposite end of the first shaft 110a. The first gear portion 110c is a gear that meshes with the second gear portion 210 of the speed reducer 200, and transmits the driving force of the motor 100 to the speed reducer 200. The first gear portion 110c is provided on the outer surface of the second shaft 110b in the radial direction. The second shaft 110b projects axially from the motor housing 401 to the other side. Therefore, the portion of the second shaft 110b on the other side in the axial direction and the first gear portion 110c are housed in the reduction housing 402.

ロータコア１１１は、中心軸ＣＡを中心とする環状の磁性体であり、本実施形態では板状の電磁鋼板が複数積層された積層体である。ロータコア１１１は、第１シャフト１１０ａの径方向外側面に固定される。ロータコア１１１は、該ロータコア１１１を軸方向に貫通する複数の貫通孔１１１１を有する。各々の貫通孔１１１１は、周方向に間隔を有して配列される。 The rotor core 111 is an annular magnetic material centered on the central axis CA, and in the present embodiment, it is a laminated body in which a plurality of plate-shaped electromagnetic steel sheets are laminated. The rotor core 111 is fixed to the radial outer surface of the first shaft 110a. The rotor core 111 has a plurality of through holes 1111 that penetrate the rotor core 111 in the axial direction. The through holes 1111 are arranged at intervals in the circumferential direction.

マグネット１１２は、複数のマグネット片（図示省略）を有する。各々のマグネット片は、径方向と直交する方向に広がる平板状であり、ロータコア１１１の各々の貫通孔１１１１内に保持される。言い換えると、各々のマグネット片は、周方向に間隔を有して配列される。 The magnet 112 has a plurality of magnet pieces (not shown). Each magnet piece has a flat plate shape extending in a direction orthogonal to the radial direction, and is held in each through hole 1111 of the rotor core 111. In other words, each magnet piece is arranged at intervals in the circumferential direction.

＜１−３．ステータ＞
ステータ１２は、ロータ１１を駆動して回転させる。ステータ１２は、中心軸ＣＡを中心とする環状である。図２は、ステータ１２の軸方向一方側端部の斜視図である。図３は、ステータ１２の断面斜視図である。図３では、軸方向に垂直な仮想の平面でステータ１２を切断した断面構造を示している。 <1-3. Stator>
The stator 12 drives and rotates the rotor 11. The stator 12 is an annular shape centered on the central axis CA. FIG. 2 is a perspective view of one end of the stator 12 in the axial direction. FIG. 3 is a cross-sectional perspective view of the stator 12. FIG. 3 shows a cross-sectional structure in which the stator 12 is cut in a virtual plane perpendicular to the axial direction.

ステータ１２は、ステータコア１２１と、インシュレータ（図示省略）と、コイル部１２２と、絶縁シート１２３と、結束部材１２４と、押さえ部材１２５と、を有する。 The stator 12 includes a stator core 121, an insulator (not shown), a coil portion 122, an insulating sheet 123, a binding member 124, and a pressing member 125.

ステータコア１２１は、中心軸ＣＡを中心とする環状の磁性体であり、本実施形態では板状の電磁鋼板が複数積層された積層体である。ステータコア１２１は、図３に示すように、環状のコアバック１２１１と、複数のティース１２１２と、複数のスロットＳと、を有する。 The stator core 121 is an annular magnetic material centered on the central axis CA, and in the present embodiment, it is a laminated body in which a plurality of plate-shaped electromagnetic steel sheets are laminated. As shown in FIG. 3, the stator core 121 has an annular core back 1211, a plurality of teeth 1212, and a plurality of slots S.

複数のティース１２１２は、コアバック１２１１の径方向内端部から径方向内方に延び、周方向に並ぶ。周方向に隣り合うティース間には、複数のスロットＳが設けられる。複数のスロットＳは、環状のステータコア１２１の径方向内端部に設けられ、周方向に並ぶ。各々のスロットＳには、コイル部１２２の直線部１２２２（後述する図７参照）が収容される。各々のスロットＳの径方向内端部には、コイル部１２２の導線をスロットＳからはみ出させないようにするため、軸方向に伸びる帯状の押さえ部材１２５が、スロットＳ内において、コイル部１２２の直線部１２２２よりも径方向内方に配置される。 The plurality of teeth 1212 extend radially inward from the radial inner end portion of the core back 1211 and are arranged in the circumferential direction. A plurality of slots S are provided between the teeth adjacent to each other in the circumferential direction. The plurality of slots S are provided at the radial inner ends of the annular stator core 121 and are arranged in the circumferential direction. Each slot S accommodates a linear portion 1222 of the coil portion 122 (see FIG. 7 described later). At the radial inner end of each slot S, a strip-shaped pressing member 125 extending in the axial direction is provided in the slot S to prevent the lead wire of the coil portion 122 from protruding from the slot S. It is arranged radially inward from the portion 1222.

各々のコイル部１２２は、異なるスロットＳ間を跨いで設けられる。本実施形態では、複数のコイル部１２２は、分布巻き方式で単層重ね巻きされる。より具体的には、コイル部１２２は、Ｕ相コイル部１２２ｕと、Ｖ相コイル部１２２ｖと、Ｗ相コイル部１２２ｗと、を有する。各相のコイル部１２２ｕ、１２２ｖ、１２２ｗは、本実施形態ではＹ結線される。各相のコイル部１２２ｕ、１２２ｖ、１２２ｗの数は本実施形態ではそれぞれ８個であり、同相のコイル部１２２は、図示しない渡り線又はブスバーを介して電気的に接続される。同相のコイル部１２２は、分布巻き方式により、他の２相のコイル部１２２が収容される複数のスロットＳを跨いで離間したスロットＳに収容される。また、単層重ね巻きにより、各スロットＳには、同相のコイル部１２２が収容される。言い換えると、同じスロットＳに異相のコイル部１２２は収容されない。 Each coil portion 122 is provided so as to straddle between different slots S. In the present embodiment, the plurality of coil portions 122 are wound in a single layer by a distributed winding method. More specifically, the coil portion 122 has a U-phase coil portion 122u, a V-phase coil portion 122v, and a W-phase coil portion 122w. The coil portions 122u, 122v, 122w of each phase are Y-connected in this embodiment. The number of coil portions 122u, 122v, 122w of each phase is eight in the present embodiment, and the coil portions 122 of the same phase are electrically connected via a crossover wire or a bus bar (not shown). The in-phase coil portion 122 is housed in a slot S separated across a plurality of slots S in which the other two-phase coil portions 122 are housed by a distributed winding method. Further, the coil portions 122 having the same phase are accommodated in each slot S by the single-layer lap winding. In other words, the coil portion 122 having a different phase is not accommodated in the same slot S.

たとえば、本実施形態では、周方向に並ぶ２つのスロットＳに、同相のコイル部１２２の一方の直線部１２２２が１つずつ収容される。たとえば図３の周方向一方に向かって並ぶスロットＳ１からＳ１２において、２つのうちの一方のＵ相コイル部１２２ｕの直線部１２２２が、スロットＳ２からＳ７を跨いで、スロットＳ１及びＳ８に収容される。また、２つのうちの他方のＵ相コイル部１２２ｕの直線部１２２２が、スロットＳ３からＳ６を跨いで、スロットＳ２及びＳ７に収容される。また、２つのうちの一方のＶ相コイル部１２２ｖの直線部１２２２が、スロットＳ４からＳ９を跨いで、スロットＳ３及びＳ１０に収容される。また、２つのうちの他方のＶ相コイル部１２２ｖの直線部１２２２が、スロットＳ５からＳ８を跨いで、スロットＳ４及びＳ９に収容される。また、２つのうちの一方のＷ相コイル部１２２ｗの直線部１２２２が、スロットＳ６からＳ１１を跨いで、スロットＳ５及びＳ１２に収容される。また、２つのうちの他方のＷ相コイル部１２２ｗの直線部１２２２が、スロットＳ７からＳ１０を跨いで、スロットＳ６及びＳ１１に収容される。他の複数のスロットＳでも同様に、各相のコイル部１２２の直線部１２２２が収容される。 For example, in the present embodiment, one straight line portion 1222 of one of the in-phase coil portions 122 is housed in two slots S arranged in the circumferential direction. For example, in slots S1 to S12 arranged in one direction in the circumferential direction of FIG. 3, the straight portion 1222 of one of the two U-phase coil portions 122u straddles slots S2 to S7 and is accommodated in slots S1 and S8. .. Further, the linear portion 1222 of the other U-phase coil portion 122u of the two is accommodated in slots S2 and S7 across slots S3 to S6. Further, a linear portion 1222 of one of the two V-phase coil portions 122v is accommodated in slots S3 and S10 across slots S4 to S9. Further, the linear portion 1222 of the other V-phase coil portion 122v of the two is accommodated in slots S4 and S9 across slots S5 to S8. Further, the straight portion 1222 of one of the two W-phase coil portions 122w straddles slots S6 to S11 and is accommodated in slots S5 and S12. Further, the straight portion 1222 of the other W-phase coil portion 122w of the two is accommodated in slots S6 and S11 across slots S7 to S10. Similarly, in the other plurality of slots S, the linear portion 1222 of the coil portion 122 of each phase is accommodated.

また、コイル部１２２の導線には、本実施形態では断面形状が円形の丸線を用いている。但し、この例示に限定されず、断面形状が円形以外の形状を有する導線が使用されてもよい。たとえば、導線の断面形状は、矩形、六角形などの多角形状であってもよい。 Further, as the lead wire of the coil portion 122, a round wire having a circular cross-sectional shape is used in this embodiment. However, the present invention is not limited to this example, and a conducting wire having a cross-sectional shape other than a circular shape may be used. For example, the cross-sectional shape of the lead wire may be a polygonal shape such as a rectangle or a hexagon.

各々のコイル部１２２は、コイルエンド１２２１を有する。コイルエンド１２２１は、コイル部１２２のスロットＳから外部に突出する部分であり、ステータコア１２１の軸方向一方側端部よりも軸方向一方側とステータコア１２１の軸方向他方側端部よりも軸方向他方側とに設けられる。 Each coil portion 122 has a coil end 1221. The coil end 1221 is a portion that protrudes outward from the slot S of the coil portion 122, and is one side in the axial direction of the stator core 121 and the other in the axial direction of the other end of the stator core 121. It is provided on the side.

絶縁シート１２３は、異なるコイル部１２２間を電気的に絶縁するために設けられる。絶縁シート１２３は、いわゆる相間絶縁紙であり、たとえば板状の薄い樹脂製の板の両面に不織紙が貼り付けられた構造である。絶縁シート１２３の構成は、後に説明する。 The insulating sheet 123 is provided to electrically insulate between the different coil portions 122. The insulating sheet 123 is a so-called interphase insulating paper, and has a structure in which non-woven paper is attached to both sides of, for example, a plate-shaped thin resin plate. The configuration of the insulating sheet 123 will be described later.

結束部材１２４は、絶縁性を有する紐状であり、コイルエンド１２２１の導線を結束する。 The binding member 124 has an insulating string shape and binds the conducting wire of the coil end 1221.

＜１−４．絶縁シート＞
次に、絶縁シート１２３の構成を実施例とその変形例とを挙げて説明する。以降の絶縁シート１２３の説明では、構成を理解し易くするため、特に但し書きの無い限り、絶縁シート１２３及びその各構成要素について、絶縁シート１２３が平面状に展開された状態での構成を説明する。 <1-4. Insulation sheet>
Next, the configuration of the insulating sheet 123 will be described with reference to an embodiment and a modification thereof. In the following description of the insulating sheet 123, in order to make the configuration easier to understand, unless otherwise specified, the insulating sheet 123 and each component thereof will be described in a state where the insulating sheet 123 is developed in a plane. ..

＜１−４−１．実施例＞
図４Ａは、平面状に展開された状態の実施例に係る絶縁シート１２３の平面図である。絶縁シート１２３は、脚部１と、一対の絶縁面部２と、を有する。絶縁シート１２３が取り付けられる際、脚部１は、スロットＳ内に設けられ、絶縁面部２同士を繋ぐ。一対の絶縁面部２はそれぞれ、ステータ１２の軸方向の両端部において、異相のコイルエンド１２２１間に挟まれて、両者を絶縁する。但し、この例示に限定されず、各々の絶縁面部２はさらに、ステータ１２の軸方向の両端部において、同相のコイルエンド１２２１間にも挟まれて、両者を絶縁してもよい。つまり、一対の絶縁面部２は、ステータ１２の軸方向の両端部において異なるコイル部１２２のスロットＳから外部に突出するコイルエンド１２２１間を絶縁してもよい。 <1-4-1. Example>
FIG. 4A is a plan view of the insulating sheet 123 according to the embodiment in the state of being developed in a plane. The insulating sheet 123 has a leg portion 1 and a pair of insulating surface portions 2. When the insulating sheet 123 is attached, the leg portion 1 is provided in the slot S and connects the insulating surface portions 2 to each other. The pair of insulating surface portions 2 are sandwiched between the coil ends 1221 of different phases at both ends of the stator 12 in the axial direction to insulate them. However, the present invention is not limited to this example, and each insulating surface portion 2 may be further sandwiched between coil ends 1221 having the same phase at both ends in the axial direction of the stator 12 to insulate them. That is, the pair of insulating surface portions 2 may insulate between the coil ends 1221 protruding outward from the slots S of the different coil portions 122 at both ends in the axial direction of the stator 12.

図４Ａに示すように、脚部１は、細い帯状であり、第１方向ｄｘに延びる。脚部１の数は、本実施形態では２本であるが、この例示には限定されず、単数又は２以外の複数であってもよい。各々の絶縁面部２は、板状であり、第１方向ｄｘ及び第２方向ｄｙに広がる。各々の絶縁面部２の第１方向端部には、脚部１の第１方向端部が接続される。より具体的には、一対の絶縁面部２は、脚部１の第１方向ｄｘの一方側に設けられる第１絶縁面部２ａと、脚部１の第１方向ｄｘの他方側に設けられる第２絶縁面部２ｂと、を有する。第１絶縁面部２ａの第１方向他方側端部には、脚部１の第１方向一方側端部が接続される。第２絶縁面部２ｂの第１方向一方側端部には、脚部１の第１方向他方側端部が接続される。 As shown in FIG. 4A, the leg 1 has a thin band shape and extends in the first direction dx. The number of legs 1 is two in the present embodiment, but is not limited to this example, and may be a single number or a plurality of legs other than two. Each insulating surface portion 2 has a plate shape and spreads in the first direction dx and the second direction dy. The first direction end portion of the leg portion 1 is connected to the first direction end portion of each insulating surface portion 2. More specifically, the pair of insulating surface portions 2 are provided on one side of the first direction dx of the leg portion 1 and the second insulating surface portion 2a provided on the other side of the leg portion 1 in the first direction dx. It has an insulating surface portion 2b. The one-side end in the first direction of the leg 1 is connected to the other-side end in the first direction of the first insulating surface 2a. The other end of the leg 1 in the first direction is connected to the one end of the second insulating surface 2b in the first direction.

＜１−４−１−１．絶縁面部＞
次に、絶縁面部２の形状を説明する。なお、第１絶縁面部２ａ及び第２絶縁面部２ｂは、第１方向ｄｘにおいて脚部１の中央部を通り且つ第１方向と垂直な仮想の平面に対して面対称な形状であり、これ以外の構成は同じである。よって、ここでは、第１絶縁面部２ａを代表にして絶縁面部２の構成を説明する。 <1-4-1-1. Insulated surface>
Next, the shape of the insulating surface portion 2 will be described. The first insulating surface portion 2a and the second insulating surface portion 2b have a shape symmetrical with respect to a virtual plane that passes through the central portion of the leg portion 1 in the first direction dx and is perpendicular to the first direction. The composition of is the same. Therefore, here, the configuration of the insulating surface portion 2 will be described with the first insulating surface portion 2a as a representative.

図４Ｂは、実施例に係る絶縁面部２の平面図である。絶縁面部２は、図４Ｂに示すように、第１縁部２０１と、第２縁部２０２と、第３縁部２０３と、第４縁部２０４と、を有する。第１縁部２０１は、絶縁面部２の第１方向ｄｘにおける脚部１側の端部である。第２縁部２０２は、絶縁面部２の第１方向ｄｘにおける脚部１とは反対側の端部である。第３縁部２０３は、絶縁面部２の第２方向一方側端部であり、第１縁部２０１の第２方向一方側端と第２縁部２０２の第２方向一方側端とを繋ぐ。第４縁部２０４は、絶縁面部２の第２方向他方側端部である。 FIG. 4B is a plan view of the insulating surface portion 2 according to the embodiment. As shown in FIG. 4B, the insulating surface portion 2 has a first edge portion 201, a second edge portion 202, a third edge portion 203, and a fourth edge portion 204. The first edge portion 201 is an end portion of the insulating surface portion 2 on the leg 1 side in the first direction dx. The second edge portion 202 is an end portion of the insulating surface portion 2 on the side opposite to the leg portion 1 in the first direction dx. The third edge portion 203 is a second-direction one-sided end portion of the insulating surface portion 2, and connects the second-direction one-sided end of the first edge portion 201 with the second-direction one-sided end of the second edge portion 202. The fourth edge portion 204 is the other end portion of the insulating surface portion 2 in the second direction.

第３縁部２０３は、傾斜縁部２０３１を含む。傾斜縁部２０３１は、絶縁面部２の第２縁部２０２での第２方向一方側端部から延びるとともに、第１方向ｄｘにおける脚部１側に向かうにつれて第２方向一方ｄｙ１側に傾く。なお、傾斜縁部２０３１は、本実施形態では円弧形状であるが、この例示に限定されず、たとえば、直線形状であってもよいし、他の曲線形状であってもよい。 The third edge portion 203 includes the inclined edge portion 2031. The inclined edge portion 2031 extends from the end portion of the insulating surface portion 2 on the second edge portion 202 in the second direction on one side in the second direction, and is inclined toward the leg portion 1 side in the first direction dx toward the dy1 side in the second direction. The inclined edge portion 2031 has an arc shape in the present embodiment, but is not limited to this example, and may have, for example, a linear shape or another curved shape.

絶縁シート１２３が平面状に展開された状態において、傾斜縁部２０３１の第１方向ｄｘにおける脚部１とは反対側の端部は、絶縁面部２の第２縁部２０２に接続される。 In the state where the insulating sheet 123 is developed in a plane, the end portion of the inclined edge portion 2031 in the first direction dx opposite to the leg portion 1 is connected to the second edge portion 202 of the insulating surface portion 2.

第２方向ｄｙにおいて、傾斜縁部２０３１の第２方向他方側端部は、本実施形態では脚部１よりも第２方向一方ｄｙ１側に位置する。言い換えると、本実施形態では、傾斜縁部２０３１は全て、脚部１よりも第２方向一方ｄｙ１側に設けられる。但し、この例示に限定されず、傾斜縁部２０３１の第２方向他方側端部は、脚部１よりも第２方向他方ｄｙ２側に位置してもよい。言い換えると、傾斜縁部２０３１の第２方向一方ｄｙ１側の部分は脚部１よりも第２方向一方ｄｙ１側に設けられ、傾斜縁部２０３１の第２方向他方ｄｙ２側の部分は脚部１よりも第２方向他方ｄｙ２側に設けられてもよい。つまり、第２方向ｄｙにおいて、傾斜縁部２０３１の少なくとも一部は、脚部１よりも第２方向一方ｄｙ１側に設けられればよい。 In the second direction dy, the end portion of the inclined edge portion 2031 on the other side in the second direction is located on the one side dy1 side in the second direction with respect to the leg portion 1 in the present embodiment. In other words, in the present embodiment, all the inclined edge portions 2031 are provided on the dy1 side in the second direction with respect to the leg portion 1. However, the present invention is not limited to this example, and the other end of the inclined edge portion 2031 in the second direction may be located on the other dy2 side of the second direction with respect to the leg portion 1. In other words, the portion of the inclined edge portion 2031 on the second direction dy1 side is provided on the second direction one dy1 side of the leg portion 1, and the portion of the inclined edge portion 2031 on the second direction other dy2 side is provided from the leg portion 1. May be provided on the other dy2 side in the second direction. That is, in the second direction dy, at least a part of the inclined edge portion 2031 may be provided on the dy1 side in the second direction with respect to the leg portion 1.

こうすれば、異なるコイルエンド１２２１間を絶縁面部２が十分に絶縁できる程度の傾斜縁部２０３１を絶縁シート１２３の絶縁面部２に設けることにより、絶縁面部２の第２縁部２０２と第３縁部２０３との間の角を除去できる。 By doing so, the second edge portion 202 and the third edge portion 202 of the insulating surface portion 2 are provided on the insulating surface portion 2 of the insulating sheet 123 so that the insulating surface portion 2 can sufficiently insulate between the different coil ends 1221. The corner between the portion 203 and the portion 203 can be removed.

そのため、たとえば、ステータ１２の製造工程において、ステータコア１２１に設けられたコイル部１２２のコイルエンド１２２１が紐などの結束部材１２４で結束される際、上述の角の除去によって、絶縁シート１２３のスプリングバックを弱めることができる。なお、スプリングバックは、絶縁面部２が曲げに反発して板状に戻ろうとする現象である。スプリングバックにより、絶縁面部２は、自身の剛性によって結束部材１２４から作用する力に反発するため、コイルエンド１２２１の表面に沿って曲がり難くなる。従って、スプリングバックを弱めることにより、結束部材１２４に撓みが生じることを抑制できる。よって、コイルエンド１２２１での導線の結束の緩みと、これに起因するコイルエンド１２２１での導線の結束密度の低下と、を抑制できる。 Therefore, for example, in the manufacturing process of the stator 12, when the coil end 1221 of the coil portion 122 provided on the stator core 121 is bound by a binding member 124 such as a string, the insulation sheet 123 is springed back by removing the above-mentioned corners. Can be weakened. The springback is a phenomenon in which the insulating surface portion 2 repels bending and tries to return to a plate shape. Due to the springback, the insulating surface portion 2 repels the force acting from the binding member 124 due to its own rigidity, so that it becomes difficult to bend along the surface of the coil end 1221. Therefore, by weakening the springback, it is possible to prevent the binding member 124 from bending. Therefore, it is possible to suppress loosening of the binding of the conducting wire at the coil end 1221 and a decrease in the binding density of the conducting wire at the coil end 1221 due to this.

また、コイルエンド１２２１で結束される導線の結束密度をより均一にできるので、たとえばコイルエンド１２２１にワニスなどを含浸させる際、導線間にワニスをより均一に分布させることができる。 Further, since the binding density of the conducting wires bound by the coil end 1221 can be made more uniform, for example, when the coil end 1221 is impregnated with varnish or the like, the varnish can be more evenly distributed between the conducting wires.

また、結束したコイルエンド１２２１の表面に沿って絶縁面部２が曲がり易くなるため、絶縁面部２とコイルエンド１２２１の表面との間に隙間が生じ難い。従って、オイルなどの冷却液をコイルエンド１２２１に掛けて冷却する際、コイルエンド１２２１表面の絶縁面部２による被覆部分の熱が、絶縁面部２を介して冷却液に伝達され易くなる。従って、ステータ１２をより確実に冷却できる。 Further, since the insulating surface portion 2 is easily bent along the surface of the bound coil end 1221, a gap is unlikely to occur between the insulating surface portion 2 and the surface of the coil end 1221. Therefore, when a cooling liquid such as oil is applied to the coil end 1221 to cool the coil end 1221, the heat of the covering portion by the insulating surface portion 2 on the surface of the coil end 1221 is easily transferred to the coolant through the insulating surface portion 2. Therefore, the stator 12 can be cooled more reliably.

また、本実施形態では、絶縁シート１２３が平面状に展開された状態において、傾斜縁部２０３１の第１方向ｄｘにおける脚部１とは反対側の端部は、脚部１よりも第２方向一方ｄｙ１側にある。こうすれば、全ての傾斜縁部２０３１を脚部１よりも第２方向一方ｄｙ１側に設けることができる。そのため、上述の角における絶縁シート１２３のスプリングバックによるコイルエンド１２２１の結束の緩みを十分に抑制できる程度に、該角を除去する範囲を狭くできる。このことは、絶縁面部２によるコイルエンド１２２１間の絶縁を優先する際、特に有効である。 Further, in the present embodiment, in the state where the insulating sheet 123 is developed in a plane shape, the end portion of the inclined edge portion 2031 in the first direction dx opposite to the leg portion 1 is in the second direction than the leg portion 1. On the other hand, it is on the dy1 side. In this way, all the inclined edge portions 2031 can be provided on the dy1 side in the second direction with respect to the leg portion 1. Therefore, the range for removing the corners can be narrowed to such an extent that the looseness of the binding of the coil end 1221 due to the springback of the insulating sheet 123 at the above corners can be sufficiently suppressed. This is particularly effective when giving priority to the insulation between the coil ends 1221 by the insulating surface portion 2.

また、本実施形態では、絶縁シート１２３が平面状に展開された状態において、傾斜縁部２０３１の第１方向ｄｘにおける脚部１側の端部は、絶縁面部２の第１縁部２０１の第２方向一方側端に接続される。これにより、絶縁面部２の脚部１よりも第２方向一方側にある部分を残した状態で、絶縁面部２の第３縁部２０３全体を傾斜縁部２０３１にすることができる。但し、本実施形態の例示に限定されず、傾斜縁部２０３１の第１方向ｄｘにおける脚部１側の端部は、絶縁面部２の第１縁部２０１には接続されず、第１縁部２０１から離れていてもよい。つまり、傾斜縁部２０３１は、第３縁部２０３の一部であってもよい。 Further, in the present embodiment, in the state where the insulating sheet 123 is developed in a plane shape, the end portion of the inclined edge portion 2031 on the leg 1 side in the first direction dx is the first edge portion 201 of the insulating surface portion 2. Connected to one end in two directions. As a result, the entire third edge portion 203 of the insulating surface portion 2 can be made into an inclined edge portion 2031 while leaving a portion of the insulating surface portion 2 on one side in the second direction from the leg portion 1. However, the present invention is not limited to the example, and the end portion of the inclined edge portion 2031 in the first direction dx on the leg portion 1 side is not connected to the first edge portion 201 of the insulating surface portion 2, and is not connected to the first edge portion 201. It may be away from 201. That is, the inclined edge portion 2031 may be a part of the third edge portion 203.

また、絶縁面部２は、図４Ｂに示すように、突片部２４を有する。突片部２４は、絶縁面部２の第１縁部２０１において、脚部１より第２方向他方ｄｙ２側に設けられる。また、突片部２４は、第１方向ｄｘにおいて脚部１と第１縁部２０１との接続部分よりも脚部１側に突出して配置される。絶縁シート１２３がコイルエンド１２２１とともに結束される際、突片部２４は、曲がって、コイルエンド１２２１とステータコア１２１の軸方向端面に設けられたインシュレータとの間に挟まれる。 Further, the insulating surface portion 2 has a projecting piece portion 24 as shown in FIG. 4B. The projecting piece portion 24 is provided on the first edge portion 201 of the insulating surface portion 2 on the other dy2 side in the second direction from the leg portion 1. Further, the projecting piece portion 24 is arranged so as to project toward the leg portion 1 side from the connecting portion between the leg portion 1 and the first edge portion 201 in the first direction dx. When the insulating sheet 123 is bound together with the coil end 1221, the projecting piece portion 24 is bent and sandwiched between the coil end 1221 and the insulator provided on the axial end surface of the stator core 121.

＜１−４−２．変形例＞
次に、絶縁シート１２３の変形例を説明する。なお、以下では、実施例と同じ構成要素には同じ符号を付し、その説明を省略することがある。図５Ａは、平面状に展開された状態の変形例に係る絶縁シート１２３の平面図である。図５Ｂは、変形例に係る絶縁面部２の平面図である。 <1-4-2. Modification example>
Next, a modification of the insulating sheet 123 will be described. In the following, the same components as those in the embodiment are designated by the same reference numerals, and the description thereof may be omitted. FIG. 5A is a plan view of the insulating sheet 123 according to a modified example in a state of being developed in a plane. FIG. 5B is a plan view of the insulating surface portion 2 according to the modified example.

変形例に係る絶縁面部２は、図５Ａ及び図５Ｂに示すように、折り部２２と、第１折り線部２２１と、を有する。 As shown in FIGS. 5A and 5B, the insulating surface portion 2 according to the modified example has a folded portion 22 and a first folded line portion 221.

折り部２２は、絶縁面部２のうちの第１折り線部２２１よりも第１方向ｄｘにおける脚部１とは反対側且つ第２方向他方ｄｙ２側の部分である。折り部２２は、第１折り線部２２１を中心とする周方向に折り曲げ可能である。 The folded portion 22 is a portion of the insulating surface portion 2 on the side opposite to the leg portion 1 in the first direction dx and on the other side of the second direction dy2 than the first folded line portion 221. The folded portion 22 can be bent in the circumferential direction centered on the first folded line portion 221.

第１折り線部２２１は、折り部２２を折り曲げ可能にするために予め絶縁面部２に設けられる関節部分であり、少なくとも第２方向ｄｙに延びる。第１折り線部２２１は、たとえば絶縁面部２の厚さ方向に凹む溝などにより実現される。第１折り線部２２１の第２方向一方側端部は、本実施形態では、絶縁面部２の第２縁部２０２に接続される。但し、この例示に限定されず、第１折り線部２２１の第２方向一方側端部は、傾斜縁部２０３１に接続されてもよい。第１折り線部２２１の第２方向他方側端部は、絶縁面部２の第４縁部２０４に接続される。 The first folding line portion 221 is a joint portion provided in advance on the insulating surface portion 2 in order to make the folding portion 22 bendable, and extends at least in the second direction dy. The first folded line portion 221 is realized by, for example, a groove recessed in the thickness direction of the insulating surface portion 2. In the present embodiment, the one-sided end portion of the first folding line portion 221 in the second direction is connected to the second edge portion 202 of the insulating surface portion 2. However, the present invention is not limited to this example, and the one-sided end portion of the first folding line portion 221 in the second direction may be connected to the inclined edge portion 2031. The other end of the first folded wire portion 221 in the second direction is connected to the fourth edge portion 204 of the insulating surface portion 2.

こうすれば、絶縁シート１２３がコイルエンド１２２１とともに結束される際、結束部材１２４から作用する力で折り部２２が折れ曲がる。そのため、折り部２２とコイルエンド１２２１の表面との間に隙間が生じ難い。従って、絶縁面部２のスプリングバックを大幅に弱めることができるので、結束部材１２４の撓みをより効果的に抑制できる。なお、本実施形態の例示に限定されず、絶縁面部２には、折り部２２及び第１折り線部２２１が設けられなくてもよい。 In this way, when the insulating sheet 123 is bound together with the coil end 1221, the folded portion 22 is bent by the force acting from the binding member 124. Therefore, a gap is unlikely to occur between the folded portion 22 and the surface of the coil end 1221. Therefore, since the springback of the insulating surface portion 2 can be significantly weakened, the bending of the binding member 124 can be suppressed more effectively. The insulating surface portion 2 may not be provided with the folded portion 22 and the first folded wire portion 221 without being limited to the examples of the present embodiment.

また、変形例に係る絶縁面部２は、図５Ａ及び図５Ｂに示すように、第１凹部２３１を有する。絶縁シート１２３が平面状に展開された状態において、第１凹部２３１は、絶縁面部２の第１縁部２０１に設けられ、第１方向ｄｘにおける脚部１とは反対側に凹む。絶縁シート１２３がコイルエンド１２２１とともに結束される際、結束部材１２４が絶縁面部２の第１縁部２０１に掛かることがある。第１縁部２０１に第１凹部２３１を設けることにより、結束部材１２４が、第１凹部２３１内に入り込むことにより、絶縁面部２の第１縁部２０１から予測不能な方向に亀裂が生じることを防止できる。なお、本実施形態の例示に限定されず、絶縁面部２には、第１凹部２３１が設けられなくてもよい。 Further, the insulating surface portion 2 according to the modified example has a first recess 231 as shown in FIGS. 5A and 5B. In a state where the insulating sheet 123 is developed in a plane, the first recess 231 is provided on the first edge 201 of the insulating surface 2 and is recessed on the side opposite to the leg 1 in the first direction dx. When the insulating sheet 123 is bound together with the coil end 1221, the binding member 124 may hang on the first edge portion 201 of the insulating surface portion 2. By providing the first recess 231 in the first edge 201, the binding member 124 enters the first recess 231 and cracks occur in an unpredictable direction from the first edge 201 of the insulating surface 2. Can be prevented. In addition, the present invention is not limited to the example, and the first recess 231 may not be provided on the insulating surface portion 2.

また、変形例に係る絶縁面部２は、図５Ａ及び図５Ｂに示すように、第２凹部２３２を有する。絶縁シート１２３が平面状に展開された状態において、第２凹部２３２は、絶縁面部２の第２縁部２０２に設けられ、第１方向ｄｘにおける脚部１側に凹む。こうすれば、絶縁シート１２３がコイルエンド１２２１とともに結束される際、絶縁面部２の第２縁部２０２側の部分のうちの第２凹部２３２よりも第２方向一方ｄｙ１側の部分と、第２凹部２３２よりも第２方向他方ｄｙ２側の部分と、を別々に折り曲げることができる。そのため、絶縁面部２の第１方向ｄｘにおける脚部１とは反対側の部分を、コイルエンド１２２１の表面に沿ってより該表面に近接させることができる。すなわち、これらの部分をコイルエンド１２２１の表面により密着させることができる。なお、本実施形態の例示に限定されず、絶縁面部２には、第２凹部２３２が設けられなくてもよい。 Further, the insulating surface portion 2 according to the modified example has a second recess 232 as shown in FIGS. 5A and 5B. In the state where the insulating sheet 123 is developed in a plane, the second recess 232 is provided on the second edge 202 of the insulating surface 2 and is recessed toward the leg 1 in the first direction dx. In this way, when the insulating sheet 123 is bound together with the coil end 1221, the portion of the insulating surface portion 2 on the second edge portion 202 side in the second direction from the second recess 232 and the portion on the dy1 side and the second. The portion on the other dy2 side in the second direction from the recess 232 can be bent separately. Therefore, the portion of the insulating surface portion 2 on the first direction dx opposite to the leg portion 1 can be brought closer to the surface along the surface of the coil end 1221. That is, these portions can be brought into close contact with the surface of the coil end 1221. In addition, the present invention is not limited to the example, and the insulating surface portion 2 may not be provided with the second recess 232.

また、変形例に係る絶縁面部２は、図５Ａ及び図５Ｂに示すように、第２折り線部２４１を有する。突片部２４は、第２折り線部２４１を中心とする周方向に折り曲げ可能である。第２折り線部２４１は、折り部２２を折り曲げ可能にするために予め絶縁面部２に設けられる関節部分であり、脚部１と第１縁部２０１との接続部分から少なくとも第２方向ｄｙに延びる。第２折り線部２４１の第２方向他方側端部は、第４縁部２０４に接続される。第２折り線部２４１は、たとえば絶縁面部２の厚さ方向に凹む溝などにより実現される。なお、本実施形態の例示に限定されず、絶縁面部２には、第２折り線部２４１が設けられなくてもよい。 Further, the insulating surface portion 2 according to the modified example has a second folded line portion 241 as shown in FIGS. 5A and 5B. The projecting piece portion 24 can be bent in the circumferential direction centered on the second folding line portion 241. The second fold line portion 241 is a joint portion provided in advance on the insulating surface portion 2 so that the fold portion 22 can be bent, and is at least in the second direction dy from the connection portion between the leg portion 1 and the first edge portion 201. Extend. The other end of the second fold line portion 241 in the second direction is connected to the fourth edge portion 204. The second folded wire portion 241 is realized by, for example, a groove recessed in the thickness direction of the insulating surface portion 2. In addition, the present invention is not limited to the example, and the insulating surface portion 2 may not be provided with the second folded wire portion 241.

なお、図５Ａ及び図５Ｂでは、変形例に係る絶縁面部２には、折り部２２及び第１折り線部２２１、第１凹部２３１、第２凹部２３２、及び第２折り線部２４１が設けられる。但し、変形例に係る絶縁面部２は、図５Ａ及び図５Ｂの例示に限定されない。変形例に係る絶縁面部２は、折り部２２及び第１折り線部２２１と、第１凹部２３１と、第２凹部２３２と、第２折り線部２４１と、のうちの少なくともいずれかを有していればよい。 In addition, in FIG. 5A and FIG. 5B, the insulating surface portion 2 according to the modified example is provided with a folded portion 22, a first folded line portion 221, a first concave portion 231 and a second concave portion 232, and a second folded line portion 241. .. However, the insulating surface portion 2 according to the modified example is not limited to the examples of FIGS. 5A and 5B. The insulating surface portion 2 according to the modified example has at least one of a folded portion 22, a first folded wire portion 221, a first recessed portion 231 and a second recessed portion 232, and a second folded wire portion 241. I just need to be there.

＜１−５．ステータの製造方法＞
次に、ステータ１２の製造方法を説明する。図６は、ステータ１２の製造方法の一例を説明するためのフローチャートである。 <1-5. How to manufacture the stator>
Next, a method of manufacturing the stator 12 will be described. FIG. 6 is a flowchart for explaining an example of a method for manufacturing the stator 12.

まず、長手方向を有する治具に導線を巻きつけることによりコイル形状にして、コイル部１２２を成型する（Ｓ１０１）。本実施形態では、スロットＳの総数と同じ数のコイル部１２２が成型される。コイル部１２２は、たとえば図７に示すように、長手方向の両端部分のコイルエンド１２２１と、長手方向に延びる一対の直線部１２２２と、を有する形状に成型される。なお、一対の直線部１２２２は、第１直線部１２２２ａと、第２直線部１２２２ｂと、を有する。この際、図７に示すように、各々のコイル部１２２の延伸方向ｄＬと垂直なコイル形状は、本実施形態では長手方向を有する六角形状に成型される。但し、コイル形状は、この例示に限定されず、たとえば長手方向を有する楕円形状であってもよい。 First, the coil portion 122 is molded into a coil shape by winding a lead wire around a jig having a longitudinal direction (S101). In the present embodiment, the same number of coil portions 122 as the total number of slots S are molded. As shown in FIG. 7, for example, the coil portion 122 is molded into a shape having coil ends 1221 at both ends in the longitudinal direction and a pair of straight portions 1222 extending in the longitudinal direction. The pair of straight line portions 1222 has a first straight line portion 1222a and a second straight line portion 1222b. At this time, as shown in FIG. 7, the coil shape perpendicular to the stretching direction dL of each coil portion 122 is molded into a hexagonal shape having a longitudinal direction in the present embodiment. However, the coil shape is not limited to this example, and may be, for example, an elliptical shape having a longitudinal direction.

ステータコア１２１に絶縁シート１２３を取り付ける（Ｓ１０３）。この際、スロットＳに絶縁シート１２３の脚部１が挿入される。また、本実施形態では図８に示すように、各々の絶縁シート１２３の脚部１は、周方向において２個のスロットＳを空けて順に挿入される。２つの脚部１の一方と他方は、それぞれ、周方向に連続して並び且つそれぞれに異相のコイル部１２２の直線部１２２２を収容するためのスロットＳに挿入される。たとえば、周方向に連続して並ぶスロットＳ１からＳ１２において、スロットＳ２及びＳ３には、同じ絶縁シート１２３の各々の脚部１が挿入される。スロットＳ６及びＳ７、Ｓ１０及びＳ１１などでも同じ絶縁シート１２３の各々の脚部１が挿入される。 The insulating sheet 123 is attached to the stator core 121 (S103). At this time, the leg portion 1 of the insulating sheet 123 is inserted into the slot S. Further, in the present embodiment, as shown in FIG. 8, the leg 1 of each insulating sheet 123 is inserted in order with two slots S open in the circumferential direction. One and the other of the two leg portions 1 are inserted into slots S for accommodating the linear portions 1222 of the coil portions 122 having different phases and are arranged continuously in the circumferential direction, respectively. For example, in slots S1 to S12 that are continuously arranged in the circumferential direction, each leg 1 of the same insulating sheet 123 is inserted into slots S2 and S3. Each leg 1 of the same insulating sheet 123 is inserted in slots S6 and S7, S10, S11 and the like.

次に、同相のコイル部１２２を２つずつステータコア１２１に順番に取り付ける。まず、２つの同相のコイル部１２２の各々の直線部１２２２が、該直線部１２２２を収容するスロットＳよりも径方向内方側において、該スロットＳと同じ周方向位置にそれぞれ配置される（Ｓ１０５）。この際、各々の直線部１２２２は、図３のように対応するスロットＳに収容されるように並べられる。たとえば、図３のスロットＳ１からＳ１２に注目して説明すると、２つのＵ相コイル部１２２ｕの場合、２つのうちの一方のＵ相コイル部１２２ｕの各々の直線部１２２２は、スロットＳ１、Ｓ８よりも径方向内方側において、該スロットＳ１、Ｓ８と同じ周方向位置にそれぞれ配置される。２つのうちの他方のＵ相コイル部１２２ｕの各々の直線部１２２２は、スロットＳ２、Ｓ７よりも径方向内方側において、該スロットＳ２、Ｓ７と同じ周方向位置にそれぞれ配置される。 Next, two in-phase coil portions 122 are attached to the stator core 121 in order. First, each straight line portion 1222 of the two in-phase coil portions 122 is arranged at the same circumferential position as the slot S on the radial inward side of the slot S accommodating the straight line portion 1222 (S105). ). At this time, the straight portions 1222 are arranged so as to be accommodated in the corresponding slots S as shown in FIG. For example, paying attention to slots S1 to S12 in FIG. 3, in the case of two U-phase coil portions 122u, each straight portion 1222 of one of the two U-phase coil portions 122u is from slots S1 and S8. Is arranged in the same circumferential position as the slots S1 and S8 on the inner side in the radial direction. Each straight line portion 1222 of the other U-phase coil portion 122u of the two is arranged on the radial inward side of the slots S2 and S7 at the same circumferential position as the slots S2 and S7, respectively.

そして、各々の直線部１２２２を径方向外方に押して対応するスロットＳに挿入する（Ｓ１０７）。これにより、コイル部１２２は、異なるスロットＳ間を跨いで設けられる（図３参照）。たとえば、図３のスロットＳ１からＳ１２に注目して説明すると、２つのＵ相コイル部１２２ｕの場合、２つのうちの一方のＵ相コイル部１２２ｕの各々の直線部１２２２がスロットＳ１及びＳ８に挿入され、他方のＵ相コイル部１２２ｕの各々の直線部１２２２がスロットＳ２及びＳ７に挿入される。 Then, each straight portion 1222 is pushed outward in the radial direction and inserted into the corresponding slot S (S107). As a result, the coil portion 122 is provided so as to straddle the different slots S (see FIG. 3). For example, paying attention to slots S1 to S12 in FIG. 3, in the case of two U-phase coil portions 122u, each straight portion 1222 of one of the two U-phase coil portions 122u is inserted into slots S1 and S8. Then, each straight portion 1222 of the other U-phase coil portion 122u is inserted into slots S2 and S7.

次に、全てのコイル部１２２をステータコア１２１に取り付けられていない場合（Ｓ１０９でＮＯ）、周方向一方において隣り合う別の相の２つコイル部１２２の各々の直線部１２２２が、該直線部１２２２を収容するスロットＳよりも径方向内方側において、該スロットＳと同じ周方向位置にそれぞれ配置される（Ｓ１１１）。この際も、各々の直線部１２２２は、図３のように対応するスロットＳに収容されるように並べられる。たとえば、図３のスロットＳ１からＳ１２に注目して説明すると、ステップＳ１０７にて２つのＵ相コイル部１２２ｕの直線部１２２２を挿入した後の場合、２つのうちの一方のＶ相コイル部１２２ｖの各々の直線部１２２２は、スロットＳ３、Ｓ１０よりも径方向内方側において、該スロットＳ３、Ｓ１０と同じ周方向位置にそれぞれ配置される。２つのうちの他方のＶ相コイル部１２２ｖの各々の直線部１２２２は、スロットＳ４、Ｓ９よりも径方向内方側において、該スロットＳ４、Ｓ９と同じ周方向位置にそれぞれ配置される。又は、ステップＳ１０７にて２つのＶ相コイル部１２２ｖの直線部１２２２を挿入した後の場合、２つのうちの一方のＷ相コイル部１２２ｗの各々の直線部１２２２は、スロットＳ５、Ｓ１２よりも径方向内方側において、該スロットＳ５、Ｓ１２と同じ周方向位置にそれぞれ配置される。２つのうちの他方のＷ相コイル部１２２ｗの各々の直線部１２２２は、スロットＳ６、Ｓ１１よりも径方向内方側において、該スロットＳ１、Ｓ１１と同じ周方向位置にそれぞれ配置される。 Next, when all the coil portions 122 are not attached to the stator core 121 (NO in S109), each straight portion 1222 of the two coil portions 122 of different phases adjacent to each other in the circumferential direction is the straight portion 1222. Are arranged in the same circumferential position as the slot S on the radial inward side of the slot S (S111). Also in this case, the straight portions 1222 are arranged so as to be accommodated in the corresponding slots S as shown in FIG. For example, focusing on slots S1 to S12 in FIG. 3, in the case where the straight portion 1222 of the two U-phase coil portions 122u is inserted in step S107, one of the two V-phase coil portions 122v Each straight line portion 1222 is arranged on the radial inward side of the slots S3 and S10 at the same circumferential position as the slots S3 and S10. Each linear portion 1222 of the other V-phase coil portion 122v of the two is arranged on the radial inward side of the slots S4 and S9 at the same circumferential position as the slots S4 and S9, respectively. Alternatively, when the straight portion 1222 of the two V-phase coil portions 122v is inserted in step S107, each straight portion 1222 of the W-phase coil portion 122w of one of the two has a diameter larger than that of the slots S5 and S12. On the inner side in the direction, the slots S5 and S12 are arranged at the same circumferential positions. Each straight line portion 1222 of the other W-phase coil portion 122w of the two is arranged on the radial inward side of the slots S6 and S11 at the same circumferential position as the slots S1 and S11, respectively.

そして、各々の直線部１２２２を径方向外方に押して対応するスロットＳに挿入する（Ｓ１１３）。これにより、コイル部１２２は、異なるスロットＳ間を跨いで設けられる（図３参照）。たとえば、図３のスロットＳ１からＳ１２に注目して説明すると、２つのＶ相コイル部１２２ｖの場合、２つのうちの一方のＶ相コイル部１２２ｖの直線部１２２２がスロットＳ３及びＳ１０に挿入され、他方のＶ相コイル部１２２ｖの直線部１２２２がスロットＳ４及びＳ９に挿入される。又は、２つのＷ相コイル部１２２ｗの場合、２つのうちの一方のＷ相コイル部１２２ｗの直線部１２２２がスロットＳ５及びＳ１２に挿入され、他方のＷ相コイル部１２２ｗの直線部１２２２がスロットＳ６及びＳ１１に挿入される。 Then, each straight portion 1222 is pushed outward in the radial direction and inserted into the corresponding slot S (S113). As a result, the coil portion 122 is provided so as to straddle the different slots S (see FIG. 3). For example, paying attention to slots S1 to S12 in FIG. 3, in the case of two V-phase coil portions 122v, the straight portion 1222 of one of the two V-phase coil portions 122v is inserted into slots S3 and S10. The straight portion 1222 of the other V-phase coil portion 122v is inserted into the slots S4 and S9. Alternatively, in the case of two W-phase coil portions 122w, the straight portion 1222 of one of the two W-phase coil portions 122w is inserted into slots S5 and S12, and the straight portion 1222 of the other W-phase coil portion 122w is inserted into slot S6. And S11.

次に、全てのコイル部１２２をステータコア１２１に取り付けた場合（Ｓ１０９でＹＥＳ）、各々のスロットＳに帯状の押さえ部材１２５を軸方向に挿入する（Ｓ１１５）。なお、スロットＳ内において、押さえ部材１２５は、直線部１２２２及び脚部１よりも径方向内方に設けられる。押さえ部材１２５は、直線部１２２２（つまり導線）及び脚部１がスロットＳからはみ出ることを防止する。 Next, when all the coil portions 122 are attached to the stator core 121 (YES in S109), the strip-shaped pressing member 125 is inserted into each slot S in the axial direction (S115). In the slot S, the pressing member 125 is provided inward in the radial direction with respect to the straight portion 1222 and the leg portion 1. The pressing member 125 prevents the straight portion 1222 (that is, the conducting wire) and the leg portion 1 from protruding from the slot S.

周方向に隣り合う異相のコイル部１２２のコイルエンド１２２１間に絶縁面部２を挟む（Ｓ１１７）。たとえば、図８のように、脚部１がスロットＳ１及びＳ２に挿入された絶縁シート１２３の絶縁面部２は、直線部１２２２がスロットＳ２に挿入されたＵ相コイル部１２２ｕのコイルエンド１２２１と、直線部１２２２がスロットＳ３に挿入されたＶ相コイル部１２２ｖのコイルエンド１２２１との間に挟まれる。また、脚部１がスロットＳ３及びＳ４に挿入された絶縁シート１２３の絶縁面部２は、直線部１２２２がスロットＳ４に挿入されたＶ相コイル部１２２ｖのコイルエンド１２２１と、直線部１２２２がスロットＳ５に挿入されたＷ相コイル部１２２ｗのコイルエンド１２２１との間に挟まれる。また、脚部１がスロットＳ５及びＳ６に挿入された絶縁シート１２３の絶縁面部２は、直線部１２２２がスロットＳ６に挿入されたＷ相コイル部１２２ｗのコイルエンド１２２１と、直線部１２２２がスロットＳ７に挿入されたＵ相コイル部１２２ｕのコイルエンド１２２１との間に挟まれる。 The insulating surface portion 2 is sandwiched between the coil ends 1221 of the coil portions 122 having different phases adjacent to each other in the circumferential direction (S117). For example, as shown in FIG. 8, the insulating surface portion 2 of the insulating sheet 123 in which the leg portion 1 is inserted into the slots S1 and S2 has the coil end 1221 of the U-phase coil portion 122u in which the straight portion 1222 is inserted into the slot S2. The straight portion 1222 is sandwiched between the V-phase coil portion 122v inserted in the slot S3 and the coil end 1221. Further, in the insulating surface portion 2 of the insulating sheet 123 in which the leg portion 1 is inserted into the slots S3 and S4, the coil end 1221 of the V-phase coil portion 122v in which the straight portion 1222 is inserted into the slot S4 and the straight portion 1222 are in the slot S5. It is sandwiched between the coil end 1221 of the W-phase coil portion 122w inserted in. Further, in the insulating surface portion 2 of the insulating sheet 123 in which the leg portion 1 is inserted into the slots S5 and S6, the coil end 1221 of the W-phase coil portion 122w in which the straight portion 1222 is inserted into the slot S6 and the straight portion 1222 are in the slot S7. It is sandwiched between the U-phase coil portion 122u and the coil end 1221 inserted in the U-phase coil portion 122u.

次に、異なるコイルエンド１２２１間に絶縁面部２が設けられた該コイルエンド１２２１を軸方向に押圧する（Ｓ１１９）。つまり、ステータ１２の軸方向一方側のコイルエンド１２２１は、第１絶縁面部２ａとともに軸方向他方に押圧されて、軸方向高さが低くなるように成型される。また、ステータ１２の軸方向他方側のコイルエンド１２２１は、第２絶縁面部２ｂとともに軸方向一方に押圧されて、軸方向高さが低くなるように成型される。 Next, the coil end 1221 provided with the insulating surface portion 2 between the different coil ends 1221 is pressed in the axial direction (S119). That is, the coil end 1221 on one side in the axial direction of the stator 12 is pressed against the other in the axial direction together with the first insulating surface portion 2a, and is molded so that the height in the axial direction is lowered. Further, the coil end 1221 on the other side in the axial direction of the stator 12 is pressed in one direction in the axial direction together with the second insulating surface portion 2b, and is molded so that the height in the axial direction is lowered.

次に、コイルエンド１２２１の導線がばらけないようにするため、押圧されたコイルエンド１２２１を絶縁面部２とともに結束部材１２４で結束し（Ｓ１２１：図２参照）、コイルエンドにワニスを含浸させる（Ｓ１２３）。 Next, in order to prevent the lead wire of the coil end 1221 from coming apart, the pressed coil end 1221 is bound together with the insulating surface portion 2 by the binding member 124 (S121: see FIG. 2), and the coil end is impregnated with varnish (see FIG. 2). S123).

なお、ステップＳ１１７において、絶縁面部２は、本実施形態では周方向に隣り合う同相のコイル部１２２のコイルエンド１２２１間には挟まれない。但し、この例示に限定されず、周方向に隣り合う同相のコイル部１２２のコイルエンド１２２１間にも、絶縁面部２が挟まれてもよい。つまり、ステータ１２の軸方向の両端部において異なるコイル部１２２のスロットＳから外部に突出するコイルエンド１２２１間に、該コイルエンド１２２１間を電気的に絶縁する絶縁シート１２３の絶縁面部２が設けられてもよい。 In step S117, the insulating surface portion 2 is not sandwiched between the coil ends 1221 of the coil portions 122 having the same phase adjacent to each other in the circumferential direction in the present embodiment. However, the present invention is not limited to this example, and the insulating surface portion 2 may be sandwiched between the coil ends 1221 of the coil portions 122 having the same phase adjacent to each other in the circumferential direction. That is, the insulating surface portion 2 of the insulating sheet 123 that electrically insulates between the coil ends 1221 is provided between the coil ends 1221 protruding outward from the slots S of the different coil portions 122 at both ends in the axial direction of the stator 12. You may.

また、ステップＳ１１７において、好ましくは、絶縁面部２の軸方向端（第２縁部２０２）は、コイルエンド１２２１の軸方向端よりもステータコア１２１側に位置する。つまり、ステータ１２の軸方向一方側端部において、好ましくは図８に示すように、第１絶縁面部２ａの軸方向一方側端部は、押圧される前のコイルエンド１２２１の軸方向一方側端部よりも軸方向他方側に位置する。ステータ１２の軸方向他方側端部において、好ましくは、第２絶縁面部２ｂの軸方向他方側端部は、押圧される前のコイルエンド１２２１の軸方向他方側端部よりも軸方向一方側に位置する。 Further, in step S117, preferably, the axial end (second edge 202) of the insulating surface portion 2 is located closer to the stator core 121 than the axial end of the coil end 1221. That is, at the axial one-sided end of the stator 12, preferably as shown in FIG. 8, the axial one-sided end of the first insulating surface portion 2a is the axial one-sided end of the coil end 1221 before being pressed. It is located on the other side in the axial direction from the part. At the other end of the stator 12 in the axial direction, preferably, the other end of the second insulating surface 2b in the axial direction is axially one side of the other end of the coil end 1221 before being pressed. To position.

コイルエンド１２２１を軸方向に押圧する前の状態において、絶縁面部２の軸方向端をコイルエンド１２２１の軸方向端よりもステータコア１２１側に位置させることにより、コイルエンド１２２１を軸方向に押圧した後での絶縁面部２のスプリングバックを弱めることができる。従って、コイルエンド１２２１を紐などの結束部材１２４で結束する際、結束部材１２４に撓みが生じ難くなる。よって、コイルエンド１２２１での導線の結束の緩みと、これに起因するコイルエンド１２２１での導線の結束密度の低下と、を抑制できる。 After pressing the coil end 1221 in the axial direction by positioning the axial end of the insulating surface portion 2 on the stator core 121 side of the axial end of the coil end 1221 in the state before pressing the coil end 1221 in the axial direction. The springback of the insulating surface portion 2 can be weakened. Therefore, when the coil end 1221 is bound by the binding member 124 such as a string, the binding member 124 is less likely to bend. Therefore, it is possible to suppress loosening of the binding of the conducting wire at the coil end 1221 and a decrease in the binding density of the conducting wire at the coil end 1221 due to this.

また、コイルエンド１２２１で結束される導線の結束密度をより均一にできる。従って、たとえばコイルエンド１２２１にワニスなどを含浸させる際、導線間にワニスをより均一に分布させることができる。 Further, the binding density of the lead wires bound by the coil end 1221 can be made more uniform. Therefore, for example, when the coil end 1221 is impregnated with varnish or the like, the varnish can be more evenly distributed between the conducting wires.

＜２．その他＞
以上、本発明の実施形態を説明した。なお、本発明の範囲は上述の実施形態に限定されない。本発明は、発明の主旨を逸脱しない範囲で上述の実施形態に種々の変更を加えて実施することができる。また、上述の実施形態で説明した事項は、矛盾を生じない範囲で適宜任意に組み合わせることができる。 <2. Others>
The embodiments of the present invention have been described above. The scope of the present invention is not limited to the above-described embodiment. The present invention can be implemented by making various modifications to the above-described embodiment without departing from the gist of the invention. In addition, the matters described in the above-described embodiment can be arbitrarily combined as long as they do not cause a contradiction.

本発明は、異なるコイルエンド間に絶縁シートを挟んで絶縁するステータ、及びモータを有する装置、製造方法に有用である。 The present invention is useful for devices and manufacturing methods that have a stator and a motor that insulate by sandwiching an insulating sheet between different coil ends.

１００・・・モータ、１１・・・ロータ、１１０・・・シャフト、１１０ａ・・・第１シャフト、１１０ｂ・・・第２シャフト、１１０ｃ・・・第１ギア部、１１１・・・ロータコア、１１１１・・・貫通孔、１１２・・・ロータマグネット、１２・・・ステータ、１２１・・・ステータコア、１２１１・・・コアバック、１２１２・・・ティース、Ｓ・・・スロット、１２２・・・コイル部、１２２ｕ・・・Ｕ相コイル部、１２２ｖ・・・Ｖ相コイル部、１２２ｗ・・・Ｗ相コイル部、１２２１・・・コイルエンド、１２２２・・・直線部、１２３・・・絶縁シート、１・・・脚部、２・・・絶縁面部、２ａ・・・第１絶縁面部、２ｂ・・・第２絶縁面部、２０１・・・第１縁部、２０２・・・第２縁部、２０３・・・第３縁部、２０３１・・・傾斜縁部、２０４・・・第４縁部、２２・・・折り部、２２１・・・第１折り線部、２３・・・突片部、２３１・・・第２折り線部、２４１・・・第１凹部、２４２・・・第２凹部、１２４・・・結束部材、１２５・・・押さえ部材、２００・・・減速装置、２１０・・・第２ギア部、４００・・・ハウジング、４０１・・・モータハウジング、４０２・・・減速ハウジング、７００・・・電動駆動装置、ｄｘ・・・第１方向、ｄｙ・・・第２方向、ｄｙ１・・・第２方向一方、ｄｙ２・・・第２方向他方 100 ... motor, 11 ... rotor, 110 ... shaft, 110a ... first shaft, 110b ... second shaft, 110c ... first gear part, 111 ... rotor core, 1111 ... through hole, 112 ... rotor magnet, 12 ... stator, 121 ... stator core, 1211 ... core back, 1212 ... teeth, S ... slot, 122 ... coil part , 122u ... U-phase coil part, 122v ... V-phase coil part, 122w ... W-phase coil part, 1221 ... Coil end, 1222 ... Straight part, 123 ... Insulation sheet, 1 ... Legs, 2 ... Insulated surface, 2a ... 1st insulated surface, 2b ... 2nd insulated surface, 201 ... 1st edge, 202 ... 2nd edge, 203 ... 3rd edge, 2031 ... Inclined edge, 204 ... 4th edge, 22 ... Folded part, 221 ... 1st folded line part, 23 ... Projection part, 231 ... 2nd folding line, 241 ... 1st recess, 242 ... 2nd recess, 124 ... binding member, 125 ... pressing member, 200 ... reduction gear, 210 ... 2nd gear part, 400 ... housing, 401 ... motor housing, 402 ... deceleration housing, 700 ... electric drive, dx ... 1st direction, dy ... 2nd direction, dy1 ... 2nd direction one side, dy2 ... 2nd direction other side

Claims

An annular stator core with a plurality of slots arranged in the circumferential direction at the inner end in the radial direction,
A plurality of coil portions provided across the different slots, and
An insulating sheet that electrically insulates between the different coil parts,
With
The insulating sheet is
A pair of insulating surface portions that insulate between coil ends protruding outward from the slots of the coil portions that are different at both ends in the axial direction of the stator.
A leg portion provided in the slot and connecting the insulating surface portions to each other,
Have,
In a state where the insulating sheet is developed in a plane,
The legs extend in the first direction
The insulating surface portion extends in the first direction and the second direction perpendicular to the first direction.
The first-direction end of the leg is connected to the first-direction end of the insulating surface.
One side end in the second direction at the end on the leg side in the first direction of the insulating surface portion and one side end in the second direction at the end opposite to the leg portion in the first direction of the insulating surface portion. The second-direction one-sided end portion of the insulating surface portion connecting with the insulating surface portion includes an inclined edge portion.
The inclined edge portion extends from one side end portion in the second direction at an end portion of the insulating surface portion opposite to the leg portion in the first direction, and is second toward the leg portion side in the first direction. Tilt to one side in the direction,
In the second direction, at least a part of the inclined edge portion is provided on one side of the second direction with respect to the leg portion.

In a state where the insulating sheet is developed in a plane,
The first aspect of the invention, wherein the end of the inclined edge portion opposite to the leg portion in the first direction is connected to the end portion of the insulating surface portion opposite to the leg portion in the first direction. Stator.

In a state where the insulating sheet is developed in a plane,
The stator according to claim 1 or 2, wherein the end of the inclined edge portion in the first direction opposite to the leg portion is on one side of the leg portion in the second direction.

In a state where the insulating sheet is developed in a plane,
Any one of claims 1 to 3, wherein the leg-side end of the inclined edge portion in the first direction is connected to the leg-side end of the insulating surface portion in the first direction. The stator described in.

In a state where the insulating sheet is developed in a plane,
The insulating surface portion is
At least the fold line extending in the second direction,
A fold portion that can be bent in the circumferential direction centered on the fold line portion,
Have,
The second-direction one-sided end of the folded line portion is connected to one of the inclined edge portion and the end portion of the insulating surface portion in the first direction opposite to the leg portion.
The stator according to any one of claims 1 to 4, wherein the other end of the folded line portion in the second direction is connected to the other end of the insulating surface portion in the second direction.

In a state where the insulating sheet is developed in a plane,
Any one of claims 1 to 5, wherein a first recess that is recessed on the side opposite to the leg in the first direction is provided at the end of the insulating surface portion on the leg side in the first direction. The stator described in.

In a state where the insulating sheet is developed in a plane,
Any one of claims 1 to 6, wherein a second recess recessed on the leg side in the first direction is provided at an end of the insulating surface portion on the side opposite to the leg portion in the first direction. The stator described in.

A rotor that can rotate around the central axis,
The stator according to any one of claims 1 to 7, which drives the rotor, and the stator.
Equipped with a motor.

This is a method for manufacturing a stator in which a plurality of coil portions are provided on an annular stator core in which a plurality of slots arranged in the circumferential direction are provided at the inner end in the radial direction.
A step in which the coil portion is provided across different slots, and
A step in which an insulating surface portion of an insulating sheet that electrically insulates the coil ends is provided between the coil ends protruding outward from the slots of the coil portions that are different at both ends in the axial direction of the stator.
A step of axially pressing the coil end provided with the insulating surface portion between the coil ends,
With
A method for manufacturing a stator, in which the axial end of the insulating surface portion is located closer to the stator core than the axial end of the coil end in the step where the insulating surface portion is provided.

A plurality of slots arranged in the circumferential direction are attached to a stator having an annular stator core provided at the inner end portion in the radial direction and a plurality of coil portions provided straddling the different slots, and the different coil portions are separated from each other. An insulating sheet for electrical insulation
A pair of symmetrical insulating surfaces for insulating the coil ends protruding outward from the slots of the coil portions that are different at both ends in the axial direction of the stator.
Legs provided in the slot for connecting the insulating surfaces and
Have,
The legs extend in the first direction
The insulating surface portion spreads in the first direction and the second direction perpendicular to the first direction.
The first-direction end of the leg is connected to the first-direction end of the insulating surface.
One side end in the second direction at the end on the leg side in the first direction of the insulating surface portion and one side end in the second direction at the end opposite to the leg portion in the first direction of the insulating surface portion. The second-direction one-sided end portion of the insulating surface portion connecting with the insulating surface portion includes an inclined edge portion.
The inclined edge portion extends from one side end portion in the second direction at an end portion of the insulating surface portion opposite to the leg portion in the first direction, and is second toward the leg portion side in the first direction. Tilt to one side in the direction,
In the second direction, at least a part of the inclined edge portion is provided on one side of the second direction with respect to the leg portion.