JP2018068042A - Fitting structure for reinforcement member - Google Patents

Fitting structure for reinforcement member Download PDF

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JP2018068042A
JP2018068042A JP2016205638A JP2016205638A JP2018068042A JP 2018068042 A JP2018068042 A JP 2018068042A JP 2016205638 A JP2016205638 A JP 2016205638A JP 2016205638 A JP2016205638 A JP 2016205638A JP 2018068042 A JP2018068042 A JP 2018068042A
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reinforcing member
washer
case
reinforcement member
stator core
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JP6696399B2 (en
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義忠 山岸
Yoshitada Yamagishi
義忠 山岸
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Toyota Motor Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

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  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a fitting structure for a reinforcement member that improves workability of work to fit the reinforcement member to a case in a state in which an insulation distance between the reinforcement member and a coil end is made long.SOLUTION: A reinforcement member is made of metal, and arranged between a coil end of a stator coil of a rotary electric machine and an inner wall of a case located radially outside it so as to press an axial end surface of a stator core in a stacking direction of steel plates. The reinforcement member has a reinforcement member inclined surface made thicker radially away from the coil end, and fitted to a case with a bolt penetrating a through hole of a washer and a through hole of the reinforcement member with the washer pressed against the reinforcement member inclined surface. The washer has a washer-side inclined surface made thinner radially away from the coil end to correspond to the reinforcement member-side inclined surface, and the washer-side inclined surface is in surface contact with the reinforcement member-side inclined surface.SELECTED DRAWING: Figure 1A

Description

本発明は、金属製の補強部材の取付構造に関する。   The present invention relates to a mounting structure for a metal reinforcing member.

電気自動車、ハイブリッド車両等の車両では、車両の駆動用の電動モータが搭載される。また、車両によっては発電機が搭載される。このような電動モータまたは発電機である回転電機はケースに収容される。また、回転電機は、ステータと、その内側に配置したロータとを含み、ケースに固定されてステータを形成するステータコアは、複数の円環状の鋼板を積層して構成する場合がある。ステータコアは、内方に向かって伸びる複数のティースを含み、複数のティースにステータコイルが巻回される。   In vehicles such as electric vehicles and hybrid vehicles, an electric motor for driving the vehicle is mounted. Moreover, a generator is mounted depending on the vehicle. Such a rotating electric machine that is an electric motor or a generator is housed in a case. Further, the rotating electrical machine includes a stator and a rotor disposed inside thereof, and the stator core fixed to the case to form the stator may be configured by stacking a plurality of annular steel plates. The stator core includes a plurality of teeth extending inward, and a stator coil is wound around the plurality of teeth.

このような構成では、使用時にステータコアにおける鋼板の積層方向の振動が大きくなると、ステータコイルに接続された動力線が振動して、動力線とステータコイルとの接続部の耐久性が低下する等の不都合を生じるおそれがある。特許文献１に記載された構成では、ステータコアの鋼板の積層方向における振動を抑制するために、ケースに補強部材をねじ止めによって取り付けて、ステータコアの軸方向端面を積層方向に押し付けている。   In such a configuration, when the vibration in the stacking direction of the steel plates in the stator core increases during use, the power line connected to the stator coil vibrates and the durability of the connection portion between the power line and the stator coil decreases. There is a risk of inconvenience. In the configuration described in Patent Document 1, in order to suppress vibration in the stacking direction of the steel sheets of the stator core, a reinforcing member is attached to the case by screwing, and the axial end surface of the stator core is pressed in the stacking direction.

特開２０１６−１４４２１９号公報Japanese Patent Laid-Open No. 2006-144219

特許文献１に記載された構成において、補強部材を剛性の高い金属製とする場合には、回転電機の性能低下を抑制する面から、補強部材をできる限りコイルエンドから離して絶縁距離を大きくすることが望まれる。このために、作業者が手作業で治具を用いて絶縁距離を大きくするように微調整を行いながら補強部材の取付を行うことが考えられるが、ケース内での作業空間は狭く、その微調整は困難である。   In the configuration described in Patent Document 1, when the reinforcing member is made of a metal having high rigidity, the reinforcing member is separated from the coil end as much as possible from the surface that suppresses the performance deterioration of the rotating electrical machine, and the insulation distance is increased. It is desirable. For this reason, it is conceivable that the worker manually attaches the reinforcing member while making fine adjustments so as to increase the insulation distance by using a jig. Adjustment is difficult.

本発明の目的は、補強部材の取付構造において、補強部材とコイルエンドとの絶縁距離を大きくした状態で補強部材をケースに取り付ける作業の作業性を向上することである。   The objective of this invention is improving the workability | operativity of the operation | work which attaches a reinforcement member to a case in the state which made the insulation distance of a reinforcement member and a coil end large in the attachment structure of a reinforcement member.

本発明に係る補強部材の取付構造は、円環状の鋼板が積層されて構成されるステータコアと、前記ステータコアから内方に向かって伸びる複数のティースに巻回されたステータコイルと、前記ステータコアの外方に設けられるケースと、を含む回転電機において、前記ステータコイルにおいて前記ステータコアから軸方向に突出するコイルエンドと、その半径方向外側に位置する前記ケースの内壁との間に配置され、前記ステータコアの軸方向端面を前記鋼板の積層方向に押し付ける金属製の補強部材の取付構造であって、前記補強部材は、前記半径方向において前記コイルエンドから離れる方向に向かって厚くなることによる補強部材側斜面を有し、前記補強部材側斜面にワッシャが押し付けられた状態で軸方向に伸びるボルトによって前記ケースに取り付けられ、前記ワッシャは、前記ボルトを貫通させる貫通孔を有するとともに、前記半径方向において前記コイルエンドから離れる方向に向かって薄くなることによる、前記補強部材側斜面に対応したワッシャ側斜面を有し、前記ワッシャ側斜面が前記補強部材側斜面に面接触し、前記補強部材は、前記ボルトのねじ部の最大直径より大きい直径の貫通孔を有し、前記ボルトは、前記ワッシャの貫通孔と前記補強部材の貫通孔とを貫通して前記ケースに結合される。   A reinforcing member mounting structure according to the present invention includes a stator core formed by stacking annular steel plates, a stator coil wound around a plurality of teeth extending inward from the stator core, and an outer surface of the stator core. A rotating electrical machine including a case provided on a side of the stator core, wherein the stator coil is disposed between a coil end protruding in the axial direction from the stator core and an inner wall of the case located radially outward of the stator core. It is a mounting structure of a metal reinforcing member that presses the axial end face in the direction of laminating the steel plates, and the reinforcing member has a reinforcing member side inclined surface that becomes thicker in a direction away from the coil end in the radial direction. And a bolt that extends in the axial direction with the washer pressed against the reinforcing member side slope. The washer attached to the case has a through-hole through which the bolt passes, and has a washer-side slope corresponding to the reinforcing-member-side slope by being thinned in a direction away from the coil end in the radial direction. The washer-side inclined surface is in surface contact with the reinforcing member-side inclined surface, the reinforcing member has a through-hole having a diameter larger than the maximum diameter of the threaded portion of the bolt, and the bolt is a through-hole of the washer. And the through hole of the reinforcing member are coupled to the case.

本発明に係る補強部材の取付構造によれば、ボルトをケースに結合してワッシャを補強部材に軸方向に押し付けることにより、ワッシャと補強部材との斜面同士が摺動し、補強部材が自動的にコイルエンドから離れる方向に移動する。これにより、補強部材とコイルエンドとの絶縁距離を大きくした状態で補強部材をケースに取り付ける作業の作業性を向上できる。   According to the mounting structure of the reinforcing member according to the present invention, by connecting the bolt to the case and pressing the washer against the reinforcing member in the axial direction, the inclined surfaces of the washer and the reinforcing member slide, and the reinforcing member automatically Move away from the coil end. Thereby, the workability | operativity of the operation | work which attaches a reinforcement member to a case in the state which enlarged the insulation distance of a reinforcement member and a coil end can be improved.

実施形態の補強部材である第１補強部材の取付構造を含む回転電機の一部を切断し、かつ回転電機の一部を省略して示す斜視図である。It is a perspective view which cuts some rotary electric machines including the attachment structure of the 1st reinforcement member which is a reinforcement member of embodiment, and abbreviate | omitted some rotary electric machines. 図１Ａからケースを取り除いて要部を示す斜視図である。It is a perspective view which removes a case from FIG. 1A and shows a principal part. 回転電機の全体構成を示している図１ＡのＡ−Ａ断面相当図である。It is an AA section equivalent figure of Drawing 1A showing the whole rotary electric machine composition. 図１Ａに示した第１補強部材を取り出して示す図である。It is a figure which takes out and shows the 1st reinforcement member shown in Drawing 1A. 第１補強部材を図３のＢ−Ｂ断面で切断して示している斜視図である。It is the perspective view which cut | disconnected and showed the 1st reinforcement member in the BB cross section of FIG. 図１Ａに示した第２補強部材を取り出して示す図である。It is a figure which takes out and shows the 2nd reinforcement member shown in Drawing 1A. 第１補強部材の取付構造において、ボルトの締結直前の状態を示している図２のＤ部拡大相当図である。In the attachment structure of a 1st reinforcement member, it is the D section expansion equivalent view of FIG. 2 which has shown the state just before the fastening of a volt | bolt. 図６において、ボルトを完全に締め付けた後の状態を示している図である。FIG. 7 is a view showing a state after the bolt is completely tightened in FIG. 6.

以下、図面を用いて本発明の実施形態を説明する。以下で説明する形状、材料、及び個数は、説明のための例示であって、補強部材の取付構造を含む回転電機の仕様に応じて適宜変更することができる。以下ではすべての図面において同等の要素には同一の符号を付して説明する。また、本文中の説明においては、必要に応じてそれ以前に述べた符号を用いるものとする。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. The shapes, materials, and numbers described below are illustrative examples, and can be changed as appropriate according to the specifications of the rotating electrical machine including the reinforcing member mounting structure. In the following description, identical elements are denoted by the same reference symbols in all drawings. In the description in the text, the symbols described before are used as necessary.

図１Ａは、実施形態の補強部材である第１補強部材３１の取付構造３０を含む回転電機１０の一部を切断し、かつ回転電機１０の一部を省略して示す斜視図である。図１Ｂは、図１Ａからケースを取り除いて要部を示す斜視図である。図２は、回転電機１０の全体構成を示している図１ＡのＡ−Ａ断面相当図である。   FIG. 1A is a perspective view showing a part of the rotating electrical machine 10 including the mounting structure 30 of the first reinforcing member 31 that is the reinforcing member of the embodiment, and omitting a part of the rotating electrical machine 10. FIG. 1B is a perspective view showing the main part with the case removed from FIG. 1A. FIG. 2 is a cross-sectional view corresponding to the AA cross section of FIG. 1A showing the overall configuration of the rotating electrical machine 10.

第１補強部材３１の取付構造３０は、回転電機のケース２０に第１補強部材３１を取り付ける構造である。第１補強部材３１は、回転電機１０のステータ１２を構成するステータコア１３の軸方向一端面１３ａを、ステータコア１３の鋼板の積層方向である軸方向（図１Ａ、図１Ｂ、図２の上下方向）に押し付けるために用いられる。一方、ステータ１２の軸方向において、取付構造３０と反対側では、取付構造４０によって、第２補強部材４１をケース２０に取り付ける。第２補強部材４１は、ステータコア１３の軸方向他端面１３ｂを、軸方向に押し付けるために用いられる。図２を用いて回転電機１０を説明する。   The attachment structure 30 for the first reinforcing member 31 is a structure for attaching the first reinforcing member 31 to the case 20 of the rotating electrical machine. The first reinforcing member 31 has an axial end surface 13a of the stator core 13 that constitutes the stator 12 of the rotating electrical machine 10 in the axial direction that is the stacking direction of the steel plates of the stator core 13 (the vertical direction in FIGS. 1A, 1B, and 2). Used to press against. On the other hand, the second reinforcing member 41 is attached to the case 20 by the attachment structure 40 on the opposite side of the attachment structure 30 in the axial direction of the stator 12. The second reinforcing member 41 is used for pressing the other axial end surface 13b of the stator core 13 in the axial direction. The rotating electrical machine 10 will be described with reference to FIG.

回転電機１０は、例えば３相交流電流で駆動する磁石付の同期電動機である。例えば、回転電機１０は、ハイブリッド車両を駆動するモータとして、または、発電機として、または、その両方の機能を有するモータジェネレータとして用いられる。   The rotating electrical machine 10 is a synchronous motor with a magnet that is driven by, for example, a three-phase alternating current. For example, the rotating electrical machine 10 is used as a motor that drives a hybrid vehicle, as a generator, or as a motor generator having both functions.

回転電機１０は、ステータ１２の径方向内側にロータ１６を対向配置することにより形成される。ロータ１６は、例えば円筒状のロータコア１７の周方向複数位置に磁石（図示せず）を配置することにより形成される。   The rotating electrical machine 10 is formed by disposing a rotor 16 so as to face the inside of the stator 12 in the radial direction. The rotor 16 is formed, for example, by arranging magnets (not shown) at a plurality of positions in the circumferential direction of the cylindrical rotor core 17.

ロータコア１７の中心部に形成された軸孔（図示せず）に回転軸１８が挿入されて固定されるとともに、回転軸１８の両端部がケース２０に対し軸受２４により回転可能に支持される。   The rotary shaft 18 is inserted and fixed in a shaft hole (not shown) formed in the center portion of the rotor core 17, and both end portions of the rotary shaft 18 are rotatably supported by the bearings 24 with respect to the case 20.

ステータ１２は、ケース２０の内側に固定されたステータコア１３と、ステータコイル１５とを含む。ステータコア１３は、複数の円環状の鋼板（電磁鋼板）が軸方向に積層されて、カシメ等により一体に連結されて円筒状に構成される。ステータコア１３は、内方に向かって伸びる複数のティース１３ｃと、外周面の周方向に離れた等間隔の複数位置（図１Ａの例では３つの位置）において半径方向外側に突出形成された軸方向に長いコア側突部１４とを含む。各コア側突部１４には軸方向に貫通する貫通孔１４ａが形成される。各コア側突部１４は、貫通孔１４ａに貫通されたボルト３２によって、ケース２０にステータコア１３を固定するために用いられる。ここで、「周方向」とはステータ１２の中心軸Ｏを中心とする円周方向をいい、「半径方向」とはステータ１２の中心軸Ｏに対し直交するステータ１２の半径方向をいい、「軸方向」とはステータ１２の軸方向をいう。   The stator 12 includes a stator core 13 fixed to the inside of the case 20 and a stator coil 15. The stator core 13 is formed in a cylindrical shape by laminating a plurality of annular steel plates (electromagnetic steel plates) in the axial direction and integrally connected by caulking or the like. The stator core 13 has a plurality of teeth 13c extending inward and an axial direction projecting outward in the radial direction at a plurality of equally spaced positions (three positions in the example of FIG. 1A) spaced apart in the circumferential direction of the outer peripheral surface. And a long core side protrusion 14. Each core-side protrusion 14 is formed with a through hole 14a penetrating in the axial direction. Each core-side protrusion 14 is used to fix the stator core 13 to the case 20 with a bolt 32 that penetrates the through-hole 14a. Here, “circumferential direction” refers to a circumferential direction centered on the central axis O of the stator 12, and “radial direction” refers to a radial direction of the stator 12 orthogonal to the central axis O of the stator 12, “Axial direction” refers to the axial direction of the stator 12.

ステータコイル１５は、ステータコア１３の複数のティース１３ｃに、例えば集中巻きまたは分布巻きによって巻回される。さらに、ステータコイル１５は、ステータコア１３の軸方向両端面から軸方向に突出するコイルエンド１５ａを含む。ステータコイル１５は、３相に分かれてそれぞれの相のコイルが動力線（図示せず）を介して、端子台（図示せず）の中継端子に接続される。端子台は、ケース２０に固定される。ステータコイル１５へは、中継端子を介して電源側の駆動回路（図示せず）から３相の交流電流が供給される。これによって、ステータ１２に回転磁界が発生して、ステータ１２とロータ１６との磁気的相互作用によって、回転電機１０が駆動する。   The stator coil 15 is wound around the plurality of teeth 13c of the stator core 13 by, for example, concentrated winding or distributed winding. Furthermore, the stator coil 15 includes a coil end 15 a that protrudes in the axial direction from both axial end surfaces of the stator core 13. The stator coil 15 is divided into three phases, and the coils of each phase are connected to a relay terminal of a terminal block (not shown) via a power line (not shown). The terminal block is fixed to the case 20. A three-phase alternating current is supplied to the stator coil 15 from a drive circuit (not shown) on the power supply side via a relay terminal. As a result, a rotating magnetic field is generated in the stator 12, and the rotating electrical machine 10 is driven by the magnetic interaction between the stator 12 and the rotor 16.

ステータ１２及びロータ１６は、ステータコア１３の外方に設けられるケース２０に収容される。ケース２０の軸方向一端には、ケース２０の開口部を閉塞する蓋部材２２（図２）が取り付けられる。また、ケース２０の内壁面には、ステータコアのコア側突部１４をボルト３２で固定するためのケース側突部２１ａ（図２）が形成される。図１Ａに示す例では、ステータコア１３には、外周面の周方向に離れた等間隔の３つの位置にコア側突部１４が形成される。このため、コア側突部１４に対応して、ケース側突部２１ａもケース２０の内壁面の等間隔の３つの位置に形成される。また、３つのケース側突部２１ａのうち、２つのケース側突部２１ａは、後述する第１補強部材３１の両端部の固定用としても用いられる。   The stator 12 and the rotor 16 are accommodated in a case 20 provided outside the stator core 13. A lid member 22 (FIG. 2) that closes the opening of the case 20 is attached to one end in the axial direction of the case 20. Further, a case-side protrusion 21 a (FIG. 2) for fixing the core-side protrusion 14 of the stator core with the bolt 32 is formed on the inner wall surface of the case 20. In the example shown in FIG. 1A, the core-side protrusions 14 are formed on the stator core 13 at three equally spaced positions spaced apart in the circumferential direction of the outer peripheral surface. For this reason, corresponding to the core side protrusions 14, the case side protrusions 21 a are also formed at three equally spaced positions on the inner wall surface of the case 20. Of the three case-side protrusions 21a, the two case-side protrusions 21a are also used for fixing both ends of the first reinforcing member 31 described later.

一方、ケース２０の内壁面で３つのケース側突部２１ａと周方向に離れた別の位置、具体的には、３つのケース側突部２１ａのうち、第１補強部材３１の両端部が固定される２つのケース側突部２１ａの間の中間位置には第２ケース側突部２１ｂが形成される。第２ケース側突部２１ｂには、後述する第２補強部材４１がボルト４２（図１Ａ）によって固定される。なお、コア側突部１４は、ステータコア１３から半径方向外側に向けて突出する部分である。   On the other hand, on the inner wall surface of the case 20, another position that is circumferentially separated from the three case-side protrusions 21a, specifically, the both ends of the first reinforcing member 31 are fixed in the three case-side protrusions 21a. A second case-side protrusion 21b is formed at an intermediate position between the two case-side protrusions 21a. A second reinforcing member 41, which will be described later, is fixed to the second case side protrusion 21b by a bolt 42 (FIG. 1A). The core-side protrusion 14 is a portion that protrudes outward in the radial direction from the stator core 13.

このような回転電機１０において、図１Ａに示すように、ステータコア１３の軸方向一端面１３ａは、金属製の第１補強部材３１によって鋼板の積層方向に押し付けられる。また、ステータコアの軸方向他端面１３ｂは、金属製の第２補強部材４１によって鋼板の積層方向に押し付けられる。これによって、後述のように鋼板の積層方向の振動が抑制される。なお、第１補強部材３１は、円弧状の部材であって、両端がボルト３２によりステータコア１３の軸方向一端面１３ａの外周部分の上、具体的には２つのケース側突部２１ａの上に位置する２つのコア側突部１４の上に固定される。この例では、周方向に等間隔で３つのボルト３２が設けられており、第１補強部材３１は２つのボルト３２によって固定されているため、第１補強部材３１は、１２０°を若干上回る範囲に渡って配置されている。   In such a rotating electrical machine 10, as shown in FIG. 1A, the axial end surface 13 a of the stator core 13 is pressed by the first reinforcing member 31 made of metal in the stacking direction of the steel plates. Further, the other axial end surface 13b of the stator core is pressed in the laminating direction of the steel plates by the second reinforcing member 41 made of metal. As a result, vibration in the stacking direction of the steel plates is suppressed as will be described later. The first reinforcing member 31 is an arc-shaped member, and both ends of the first reinforcing member 31 are on the outer peripheral portion of the axial one end surface 13a of the stator core 13 by bolts 32, specifically on the two case side protrusions 21a. It is fixed on the two core side protrusions 14 located. In this example, since three bolts 32 are provided at equal intervals in the circumferential direction, and the first reinforcing member 31 is fixed by the two bolts 32, the first reinforcing member 31 is in a range slightly exceeding 120 °. It is arranged over.

図３は、図１Ａに示した第１補強部材３１を取り出して示す図である。図４は、第１補強部材３１を図３のＢ−Ｂ断面で切断して示している斜視図である。第１補強部材３１は、金属により円弧状に形成され、両端部において中間部の円弧形部３１ａよりも半径方向の幅が広がった取付部３１ｂが形成される。取付部３１ｂには貫通孔３１ｃが形成される。図４に示すように、第１補強部材３１は、ボルト３２によってケース２０に取り付けられる両端部分において、半径方向外側に向かうほど厚みが大きくなっている。これにより、第１補強部材３１は、軸方向一端（図４の下端）において、軸方向に対し直交する平面上に位置する押し付け面３１ｄを有する。押し付け面３１ｄは、ステータコア１３の軸方向一端面１３ａ（図１Ａ、図１Ｂ、図２）に押し付けられる。さらに、第１補強部材３１は、軸方向他端（図４の上端）において、押し付け面３１ｄに対し傾斜した補強部材側斜面３１ｅを有する。   FIG. 3 is a view showing the first reinforcing member 31 shown in FIG. 1A. FIG. 4 is a perspective view showing the first reinforcing member 31 by cutting along the BB cross section of FIG. 3. The first reinforcing member 31 is formed in a circular arc shape by metal, and an attachment portion 31b having a radial width wider than that of the arcuate portion 31a at the middle portion is formed at both ends. A through hole 31c is formed in the attachment portion 31b. As shown in FIG. 4, the thickness of the first reinforcing member 31 increases toward the radially outer side at both end portions attached to the case 20 by bolts 32. Thereby, the 1st reinforcement member 31 has the pressing surface 31d located on the plane orthogonal to an axial direction in an axial direction one end (lower end of FIG. 4). The pressing surface 31d is pressed against one axial end surface 13a of the stator core 13 (FIGS. 1A, 1B, and 2). Furthermore, the 1st reinforcement member 31 has the reinforcement member side inclined surface 31e inclined with respect to the pressing surface 31d in the other axial end (upper end of FIG. 4).

第１補強部材３１の両端の取付部３１ｂの貫通孔３１ｃには、第１補強部材３１をケース２０に結合するための、軸方向に伸びるボルト３２（図２）が貫通される。図２に示すように、ボルト３２は、ワッシャ３３、第１補強部材３１、ステータコア１３のコア側突部１４（図１Ａ、図２）を貫通し、下端のねじ部３２ａがケース側突部２１ａに形成されたねじ孔２１ｃに結合される。このとき、ボルト３２の頭部３２ｂは、ワッシャ３３を介して第１補強部材３１を、コア側突部１４に軸方向に押し付ける。また、後述の図６、図７に示すように、ワッシャ３３は、第１補強部材３１の補強部材側斜面３１ｅに対応したワッシャ側斜面３３ａを有し、斜面３１ｅ、３３ａ同士が軸方向に押し付け合う。この押し付け合いにより、ワッシャ３３及び第１補強部材３１は、半径方向において離れる方向に移動する。これについては後で詳しく説明する。   Bolts 32 (FIG. 2) extending in the axial direction for coupling the first reinforcing member 31 to the case 20 are passed through the through holes 31 c of the attachment portions 31 b at both ends of the first reinforcing member 31. As shown in FIG. 2, the bolt 32 penetrates the washer 33, the first reinforcing member 31, and the core-side protrusion 14 (FIGS. 1A and 2) of the stator core 13, and the lower thread portion 32a is the case-side protrusion 21a. Are coupled to the screw holes 21c. At this time, the head portion 32 b of the bolt 32 presses the first reinforcing member 31 against the core-side protruding portion 14 in the axial direction via the washer 33. 6 and 7, which will be described later, the washer 33 has a washer-side inclined surface 33a corresponding to the reinforcing member-side inclined surface 31e of the first reinforcing member 31, and the inclined surfaces 31e and 33a are pressed in the axial direction. Fit. By this pressing, the washer 33 and the first reinforcing member 31 move in a direction away from each other in the radial direction. This will be described in detail later.

また、第１補強部材３１は、両端部がコア側突部１４を介してケース２０に結合された状態で、中間部の円弧形部３１ａがステータコア１３の外周部のうち、２つのコア側突部１４の間領域を、ステータコア１３の鋼板の積層方向に押し付ける。この状態で、図１Ａ、図２に示すように、第１補強部材３１は、ステータコイル１５のコイルエンド１５ａと、その半径方向外側に位置するケース２０の内壁との間に配置される。コイルエンド１５ａは、ステータコア１３から軸方向に突出するものであるが、図１Ａでは斜格子部によってコイルエンド１５ａを模式的に示している。また、図１Ｂでは、ステータコイル１５の図示を省略している。   Further, the first reinforcing member 31 is in a state in which both end portions are coupled to the case 20 via the core-side protruding portion 14, and the arc-shaped portion 31 a of the intermediate portion is located on the two core sides of the outer peripheral portion of the stator core 13. The region between the protrusions 14 is pressed in the stacking direction of the steel plates of the stator core 13. In this state, as shown in FIG. 1A and FIG. 2, the first reinforcing member 31 is disposed between the coil end 15 a of the stator coil 15 and the inner wall of the case 20 located radially outward. The coil end 15a protrudes from the stator core 13 in the axial direction. In FIG. 1A, the coil end 15a is schematically shown by a diagonal lattice portion. Moreover, in FIG. 1B, illustration of the stator coil 15 is omitted.

図５は、図１Ａに示した第２補強部材４１を取り出して示す図である。第２補強部材４１は、金属により長尺な板状に形成され、長手方向一端（図５の左端）に向かうほど幅が広がっている。第２補強部材４１の厚み方向（軸方向）両側面は平行である。第２補強部材４１の長手方向一端部には貫通孔４１ａが形成される。第２補強部材４１は、軸方向一端（図５の表側端）に、ステータコア１３の軸方向他端面１３ｂ（図１Ａ、図２）に押し付けられる押し付け面４１ｂを有する。   FIG. 5 is a view showing the second reinforcing member 41 shown in FIG. 1A. The 2nd reinforcement member 41 is formed in the elongate plate shape with a metal, and the width | variety is so widened that it goes to a longitudinal direction one end (left end of FIG. 5). Both side surfaces of the second reinforcing member 41 in the thickness direction (axial direction) are parallel. A through hole 41 a is formed at one longitudinal end of the second reinforcing member 41. The 2nd reinforcement member 41 has the pressing surface 41b pressed against the axial direction other end surface 13b (FIG. 1A, FIG. 2) of the stator core 13 in an axial direction one end (front side end of FIG. 5).

第２補強部材４１の貫通孔４１ａには、第２補強部材４１をケース２０に結合するためのボルト４２が貫通される。このボルト４２のねじ部は、ワッシャ４３、第２補強部材４１を介して第２ケース側突部２１ｂに形成されたねじ孔（図示せず）に結合される。第２ケース側突部２１ｂは、第２補強部材４１の長手方向のほぼ全長にわたって半径方向外側端部とほぼ軸方向に重なるように、周方向に伸びている。なお、第２補強部材４１の長手方向他端（図５の右端）には貫通孔４１ａより小さい第２貫通孔４１ｃが形成される。第２貫通孔４１ｃは、例えば第２ケース側突部２１ｂに軸方向に突出するように固定されたピンまたは軸方向の突部が挿通されて、第２補強部材４１のボルト４２を中心とした回転を防止するために用いることができる。   A bolt 42 for connecting the second reinforcing member 41 to the case 20 is passed through the through hole 41 a of the second reinforcing member 41. The threaded portion of the bolt 42 is coupled to a threaded hole (not shown) formed in the second case side protrusion 21b via the washer 43 and the second reinforcing member 41. The second case-side protrusion 21b extends in the circumferential direction so as to substantially overlap the radially outer end portion in the axial direction over substantially the entire length of the second reinforcing member 41 in the longitudinal direction. A second through hole 41c smaller than the through hole 41a is formed at the other longitudinal end of the second reinforcing member 41 (the right end in FIG. 5). The second through hole 41c is, for example, a pin fixed to the second case side protrusion 21b so as to protrude in the axial direction or an axial protrusion is inserted, and the bolt 42 of the second reinforcing member 41 is centered. It can be used to prevent rotation.

また、第２補強部材４１は、長手方向一端部が第２ケース側突部２１ｂに結合された状態で、半径方向内側端部（図５の上端部）がステータコア１３の軸方向他端面１３ｂのうち、第１補強部材３１と軸方向に重なる部分を、鋼板の積層方向に押し付ける。これによって、ステータコア１３の周方向の一部は、第１補強部材３１と第２補強部材４１とで軸方向に挟まれて、ステータコア１３の鋼板の振動が抑制される。このため、ステータコイル１５に接続された動力線の振動及び異音の発生を抑制できる。また、動力線の耐久性の向上を図れる。さらに、ステータコア１３の軸方向一端面１３ａ及び軸方向他端面１３ｂのそれぞれ全周にわたって補強部材を設ける場合と異なり、回転電機の軽量化を図れる。この状態で、第２補強部材４１は、コイルエンド１５ａと、その半径方向外側に位置するケース２０の内壁との間に配置される。   In addition, the second reinforcing member 41 has one end in the longitudinal direction coupled to the second case-side protrusion 21b, and the radially inner end (the upper end in FIG. 5) is on the other axial end surface 13b of the stator core 13. Of these, the portion overlapping the first reinforcing member 31 in the axial direction is pressed in the laminating direction of the steel plates. Thereby, a part of the circumferential direction of the stator core 13 is sandwiched between the first reinforcing member 31 and the second reinforcing member 41 in the axial direction, and the vibration of the steel plate of the stator core 13 is suppressed. For this reason, it is possible to suppress the vibration of the power line connected to the stator coil 15 and the generation of abnormal noise. In addition, the durability of the power line can be improved. Further, unlike the case where the reinforcing member is provided over the entire circumference of each of the axial end surface 13a and the axial other end surface 13b of the stator core 13, the weight of the rotating electrical machine can be reduced. In this state, the second reinforcing member 41 is disposed between the coil end 15a and the inner wall of the case 20 located on the radially outer side.

また、第１補強部材３１が金属製であるので、剛性及び強度を高くできる。また、第１補強部材３１を樹脂製とする場合と異なり、ボルトの締め付けによって第１補強部材３１がへたることを防止できるので、ボルトの緩みを防止できる。   Moreover, since the 1st reinforcement member 31 is metal, rigidity and intensity | strength can be made high. In addition, unlike the case where the first reinforcing member 31 is made of resin, it is possible to prevent the first reinforcing member 31 from sagging due to tightening of the bolt, so that loosening of the bolt can be prevented.

一方、第１補強部材３１は金属製であるので、コイルエンド１５ａに近づいて配置されると、コイルエンド１５ａとの絶縁距離が小さくなり、回転電機１０の性能向上を妨げる原因となる。実施形態では、このような不都合を防止するために、上記のように第１補強部材３１に補強部材側斜面３１ｅを形成し、ワッシャ３３（図７）のワッシャ側斜面３３ａとの押し付け合いにより絶縁距離を大きくした状態で第１補強部材３１をケースに取り付ける。   On the other hand, since the first reinforcing member 31 is made of metal, if the first reinforcing member 31 is disposed close to the coil end 15a, the insulation distance from the coil end 15a becomes small, which hinders performance improvement of the rotating electrical machine 10. In the embodiment, in order to prevent such inconvenience, the reinforcing member side inclined surface 31e is formed on the first reinforcing member 31 as described above, and insulation is achieved by pressing the washer 33 (FIG. 7) with the washer side inclined surface 33a. The first reinforcing member 31 is attached to the case with the distance increased.

図６は、第１補強部材３１の取付構造３０において、ボルト３２の締結直前の状態を示している図２のＤ部拡大相当図である。図７は、図６において、ボルト３２を完全に締め付けた後の状態を示している図である。   FIG. 6 is an enlarged view corresponding to the portion D of FIG. 2 showing a state immediately before the bolt 32 is fastened in the mounting structure 30 of the first reinforcing member 31. FIG. 7 is a view showing a state after the bolt 32 is completely tightened in FIG.

第１補強部材３１がボルト３２によってケース２０（図１Ａ、図２）に取り付けられた状態で、第１補強部材３１の補強部材側斜面３１ｅは、半径方向においてコイルエンド１５ａから離れる方向（図６、図７の左側）に向かって厚くなることによる斜面となる。また、補強部材側斜面３１ｅにワッシャ３３が押し付けられた状態で、ボルト３２は軸方向に伸びている。さらに、ワッシャ３３は、ボルト３２を貫通させる貫通孔３３ｂを有する。これとともに、ワッシャ３３は、半径方向においてコイルエンド１５ａから離れる方向に向かって薄くなることによる、補強部材側斜面３１ｅに対応したワッシャ側斜面３３ａを有する。そして、ワッシャ側斜面３３ａが補強部材側斜面３１ｅに面接触する。ワッシャ側斜面３３ａと軸方向に対し直交する平面との間でなす角度θ１は、補強部材側斜面３１ｅと軸方向に対し直交する平面との間でなす角度θ２と、ほぼ同じである。   In a state where the first reinforcing member 31 is attached to the case 20 (FIGS. 1A and 2) by the bolt 32, the reinforcing member-side inclined surface 31e of the first reinforcing member 31 is away from the coil end 15a in the radial direction (FIG. 6). The slope becomes thicker toward the left side of FIG. Further, the bolt 32 extends in the axial direction in a state where the washer 33 is pressed against the reinforcing member side inclined surface 31e. Further, the washer 33 has a through hole 33 b through which the bolt 32 passes. At the same time, the washer 33 has a washer-side inclined surface 33a corresponding to the reinforcing member-side inclined surface 31e by thinning in a direction away from the coil end 15a in the radial direction. The washer side inclined surface 33a is in surface contact with the reinforcing member side inclined surface 31e. An angle θ1 formed between the washer side inclined surface 33a and the plane orthogonal to the axial direction is substantially the same as an angle θ2 formed between the reinforcing member side inclined surface 31e and the plane orthogonal to the axial direction.

第１補強部材３１は、ボルト３２のねじ部３２ａの最大直径より大きい直径の貫通孔３１ｃを有する。ワッシャ３３は、ボルト３２のねじ部３２ａの最大直径より大きい直径の貫通孔３３ｂを有する。そして、ボルト３２は、ワッシャ３３の貫通孔３３ｂと第１補強部材３１の貫通孔３１ｃとを貫通してケース２０に結合される。   The first reinforcing member 31 has a through hole 31 c having a diameter larger than the maximum diameter of the threaded portion 32 a of the bolt 32. The washer 33 has a through hole 33 b having a diameter larger than the maximum diameter of the threaded portion 32 a of the bolt 32. The bolt 32 passes through the through hole 33 b of the washer 33 and the through hole 31 c of the first reinforcing member 31 and is coupled to the case 20.

これにより、図７に示すように、ボルト３２をケース２０（図１Ａ、図２）に結合してワッシャ３３を第１補強部材３１に軸方向に押し付けることにより、ワッシャ３３と第１補強部材３１との斜面３３ａ、３１ｅ同士が摺動する。そして、第１補強部材３１が、自動的にコイルエンド１５ａから離れる方向である、ケース内壁側に移動する。これにより、第１補強部材３１とコイルエンド１５ａとの絶縁距離を大きくできる。また、このようにボルト３２をケース２０に結合する際に作業者が手作業で第１補強部材３１をコイルエンド１５ａから大きく離すように微調整を行う必要がない。このため、第１補強部材３１とコイルエンド１５ａとの絶縁距離を大きくした状態で第１補強部材３１をケース２０に取り付ける作業の作業性を向上できる。さらに、ボルトの締付によって第１補強部材３１がコイルエンド１５ａ側に寄ることを考慮しなくてよいので、設計時に第１補強部材３１のコイルエンド側の隙間を広げることを考慮しなくて済み、設計作業の容易化を図れる。また、ワッシャ３３とボルト３２とが片当たりすることがなく、ボルト３２の締付力の低下を抑制できる。   Accordingly, as shown in FIG. 7, the bolt 32 is coupled to the case 20 (FIGS. 1A and 2) and the washer 33 is pressed against the first reinforcing member 31 in the axial direction, whereby the washer 33 and the first reinforcing member 31 are pressed. And the inclined surfaces 33a and 31e slide. And the 1st reinforcement member 31 moves to the case inner wall side which is the direction which leaves | separates from the coil end 15a automatically. Thereby, the insulation distance of the 1st reinforcement member 31 and the coil end 15a can be enlarged. Further, when the bolt 32 is coupled to the case 20 as described above, it is not necessary for the operator to make fine adjustment so that the first reinforcing member 31 is largely separated from the coil end 15a manually. For this reason, the workability | operativity of the operation | work which attaches the 1st reinforcement member 31 to the case 20 in the state which enlarged the insulation distance of the 1st reinforcement member 31 and the coil end 15a can be improved. Further, since it is not necessary to consider that the first reinforcing member 31 is close to the coil end 15a side by tightening the bolt, it is not necessary to consider widening the gap on the coil end side of the first reinforcing member 31 at the time of designing. The design work can be facilitated. Further, the washer 33 and the bolt 32 do not come into contact with each other, and a decrease in the tightening force of the bolt 32 can be suppressed.

なお、上記では、第２補強部材４１にはワッシャと接触する面を軸方向に対し傾斜しない平面状としている。一方、第２補強部材４１の取付構造４０において、ボルト４２をケース２０に対し図１Ａとは反対側から結合し、第１補強部材３１の取付構造３０と同様に、第２補強部材４１とワッシャ４３とに、軸方向に対し傾斜した斜面を形成することもできる。この場合には、ボルト４２をケース２０に結合した状態で、ワッシャ４３を第２補強部材４１に軸方向に押し付けて面接触させることにより、ワッシャ４３と第２補強部材４１との斜面同士を摺動させる。これにより、ボルト４２の結合によって、第２補強部材４１を自動的にコイルエンド１５ａから離れる方向に移動させることができる。その場合には、第２補強部材４１とコイルエンド１５ａとの絶縁距離を大きくした状態で第２補強部材４１をケース２０に取り付ける作業の作業性を向上できる。また、ワッシャ３３の貫通孔３３ｂはボルト３２の径と同様にして、ワッシャ３３はボルト３２を締めるときに移動できなくてもよい。この場合も、ワッシャ側斜面３３ａが補強部材側斜面３１ｅを押圧することで、第１補強部材３１が外方側に移動する。   In the above description, the second reinforcing member 41 has a flat surface that does not incline with respect to the axial direction. On the other hand, in the mounting structure 40 of the second reinforcing member 41, the bolt 42 is coupled to the case 20 from the side opposite to FIG. 1A, and the second reinforcing member 41 and the washer are attached in the same manner as the mounting structure 30 of the first reinforcing member 31. It is also possible to form a slope inclined with respect to the axial direction at 43. In this case, with the bolt 42 coupled to the case 20, the washer 43 is pressed against the second reinforcing member 41 in the axial direction to bring it into surface contact, thereby sliding the inclined surfaces of the washer 43 and the second reinforcing member 41. Move. Thereby, the 2nd reinforcement member 41 can be automatically moved to the direction which leaves | separates from the coil end 15a by the coupling | bonding of the volt | bolt 42. FIG. In this case, the workability of attaching the second reinforcement member 41 to the case 20 in a state where the insulation distance between the second reinforcement member 41 and the coil end 15a is increased can be improved. Further, the through hole 33b of the washer 33 is similar to the diameter of the bolt 32, and the washer 33 may not be movable when the bolt 32 is tightened. Also in this case, the 1st reinforcement member 31 moves to an outward side because the washer side slope 33a presses the reinforcement member side slope 31e.

また、ケース２０の軸方向他端の底部において断面が円弧形のリブ状の補強部を立設させ、その補強部に第２補強部材４１を固定することもできる。また、その補強部を直接にステータコアの軸方向他端面に押し付けて、補強部と第１補強部材３１とでステータコアの鋼板の周方向一部を、積層方向に押し付け合う構成とすることもできる。この場合には第２補強部材４１を省略できる。また、図１Ａの構成において、第２ケース側突部２１ｂの上側面に第２補強部材４１を介さず直接にステータコアの軸方向他端面の周方向一部を押し付けることにより、第２補強部材を省略することもできる。   Further, a rib-shaped reinforcing portion having an arcuate cross section can be provided upright at the bottom of the other axial end of the case 20, and the second reinforcing member 41 can be fixed to the reinforcing portion. Alternatively, the reinforcing portion may be directly pressed against the other axial end surface of the stator core, and the circumferential portion of the steel sheet of the stator core may be pressed against the stacking direction between the reinforcing portion and the first reinforcing member 31. In this case, the second reinforcing member 41 can be omitted. Further, in the configuration of FIG. 1A, by pressing a part of the circumferential direction of the other axial end surface of the stator core directly on the upper side surface of the second case side protrusion 21b without the second reinforcing member 41, the second reinforcing member is It can be omitted.

１０ 回転電機、１２ ステータ、１３ ステータコア、１３ａ 軸方向一端面、１３ｂ 軸方向他端面、１３ｃ ティース、１４ コア側突部、１４ａ 貫通孔、１５ ステータコイル、１５ａ コイルエンド、１６ ロータ、１７ ロータコア、１８ 回転軸、２０ ケース、２１ａ ケース側突部、２１ｂ 第２ケース側突部、２１ｃ ねじ孔、２２ 蓋部材、２４ 軸受、３０ 取付構造、３１ 第１補強部材、３１ａ 円弧形部、３１ｂ 取付部、３１ｃ 貫通孔、３１ｄ 押し付け面、３１ｅ 補強部材側斜面、３２ ボルト、３２ａ ねじ部、３２ｂ 頭部、３３ ワッシャ、３３ａ ワッシャ側斜面、３３ｂ 貫通孔、４０ 取付構造、４１ 第２補強部材、４１ａ 貫通孔、４１ｂ 押し付け面、４１ｃ 第２貫通孔、４２ ボルト、４３ ワッシャ。   DESCRIPTION OF SYMBOLS 10 Rotating electrical machine, 12 Stator, 13 Stator core, 13a Axial end surface, 13b Axial other end surface, 13c Teeth, 14 Core side protrusion, 14a Through hole, 15 Stator coil, 15a Coil end, 16 Rotor, 17 Rotor core, 18 Rotating shaft, 20 case, 21a Case side protrusion, 21b Second case side protrusion, 21c Screw hole, 22 Lid member, 24 Bearing, 30 Mounting structure, 31 First reinforcing member, 31a Arc-shaped portion, 31b Mounting portion , 31c Through hole, 31d Pressing surface, 31e Reinforcement member side slope, 32 bolt, 32a Screw part, 32b Head, 33 Washer, 33a Washer side slope, 33b Through hole, 40 Mounting structure, 41 Second reinforcement member, 41a Through Hole, 41b pressing surface, 41c second through hole, 42 bolt, 43 washer

Claims (1)

円環状の鋼板が積層されて構成されるステータコアと、前記ステータコアから内方に向かって伸びる複数のティースに巻回されたステータコイルと、前記ステータコアの外方に設けられるケースと、を含む回転電機において、前記ステータコイルにおいて前記ステータコアから軸方向に突出するコイルエンドと、その半径方向外側に位置する前記ケースの内壁との間に配置され、前記ステータコアの軸方向端面を前記鋼板の積層方向に押し付ける金属製の補強部材の取付構造であって、
前記補強部材は、前記半径方向において前記コイルエンドから離れる方向に向かって厚くなることによる補強部材側斜面を有し、前記補強部材側斜面にワッシャが押し付けられた状態で軸方向に伸びるボルトによって前記ケースに取り付けられ、
前記ワッシャは、前記ボルトを貫通させる貫通孔を有するとともに、前記半径方向において前記コイルエンドから離れる方向に向かって薄くなることによる、前記補強部材側斜面に対応したワッシャ側斜面を有し、前記ワッシャ側斜面が前記補強部材側斜面に面接触し、
前記補強部材は、前記ボルトのねじ部の最大直径より大きい直径の貫通孔を有し、
前記ボルトは、前記ワッシャの貫通孔と前記補強部材の貫通孔とを貫通して前記ケースに結合される、補強部材の取付構造。 A rotating electrical machine including a stator core formed by stacking annular steel plates, a stator coil wound around a plurality of teeth extending inwardly from the stator core, and a case provided outside the stator core In the stator coil, the stator coil is disposed between a coil end protruding in the axial direction from the stator core and an inner wall of the case located on the outer side in the radial direction, and presses the axial end surface of the stator core in the stacking direction of the steel plates. A mounting structure for a metal reinforcing member,
The reinforcing member has a reinforcing member side inclined surface that is thickened in a direction away from the coil end in the radial direction, and the bolt extends in the axial direction with a washer pressed against the reinforcing member side inclined surface. Attached to the case,
The washer has a through hole through which the bolt penetrates, and has a washer side slope corresponding to the reinforcing member side slope by thinning in a direction away from the coil end in the radial direction, and the washer The side slope is in surface contact with the reinforcing member side slope,
The reinforcing member has a through hole having a diameter larger than the maximum diameter of the threaded portion of the bolt,
A mounting structure for a reinforcing member, wherein the bolt is coupled to the case through the through hole of the washer and the through hole of the reinforcing member.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10220438A (en) * 1997-02-12 1998-08-21 Isuzu Motors Ltd Reference level block device for body assembly
JP2001280249A (en) * 2000-03-31 2001-10-10 Matsushita Electric Ind Co Ltd Compressor and motor
JP2013215860A (en) * 2012-04-11 2013-10-24 Hirano Tecseed Co Ltd Mounting structure and mounting member used for the same
JP2016144219A (en) * 2015-01-29 2016-08-08 トヨタ自動車株式会社 Electrical rotating machine
JP2016158389A (en) * 2015-02-24 2016-09-01 アイシン・エィ・ダブリュ株式会社 Rotary electric machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10220438A (en) * 1997-02-12 1998-08-21 Isuzu Motors Ltd Reference level block device for body assembly
JP2001280249A (en) * 2000-03-31 2001-10-10 Matsushita Electric Ind Co Ltd Compressor and motor
JP2013215860A (en) * 2012-04-11 2013-10-24 Hirano Tecseed Co Ltd Mounting structure and mounting member used for the same
JP2016144219A (en) * 2015-01-29 2016-08-08 トヨタ自動車株式会社 Electrical rotating machine
JP2016158389A (en) * 2015-02-24 2016-09-01 アイシン・エィ・ダブリュ株式会社 Rotary electric machine

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