JP2017153309A - Insulation bobbin for rotary electric machine - Google Patents

Insulation bobbin for rotary electric machine Download PDF

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Publication number
JP2017153309A
JP2017153309A JP2016035447A JP2016035447A JP2017153309A JP 2017153309 A JP2017153309 A JP 2017153309A JP 2016035447 A JP2016035447 A JP 2016035447A JP 2016035447 A JP2016035447 A JP 2016035447A JP 2017153309 A JP2017153309 A JP 2017153309A
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Prior art keywords
stator core
diameter side
outer diameter
bobbin
hole
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祐介 牧野
Yusuke Makino
祐介 牧野
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2016035447A priority Critical patent/JP2017153309A/en
Priority to PCT/JP2017/006673 priority patent/WO2017146117A1/en
Publication of JP2017153309A publication Critical patent/JP2017153309A/en
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  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an insulation bobbin for a rotary electric machine capable of efficiently cooling a stator coil with a coolant that is supplied from an outer diameter side of a stator core.SOLUTION: An insulation bobbin 31 comprises a conductor winding part 31a, an outer diameter side flange part 34b and an inner diameter side flange part 34c. In the conductor winding part 31a, tooth insertion holes 33 into which teeth 20b of a stator core 20 are inserted are formed and a conductor 32 is wound around an outer peripheral surface in a laminated state. The outer diameter side flange part 34b and the inner diameter side flange part 34c protrude from an outer diameter end and an inner diameter end of the conductor winding part 31a in a radial direction of the stator core in a lamination direction of the conductor 32. In an outer peripheral surface portion of the conductor winding part 31a in an axial direction of the stator core, an outer peripheral groove 37 extending in the radial direction of the stator core is formed and in the outer diameter side flange part 31b, a first through-hole 36 which penetrates in the radial direction of the stator core and is communicated to the outer peripheral groove 37 is formed.SELECTED DRAWING: Figure 3

Description

この発明は、例えば車両、産業用機械等に搭載される回転電動機の絶縁ボビンに関し、特に回転電動機の発熱源であるステータコイルを効率良く冷却することを可能にする技術に関する。   The present invention relates to an insulating bobbin for a rotary motor mounted on, for example, a vehicle, an industrial machine, and the like, and more particularly to a technique that enables efficient cooling of a stator coil that is a heat source of the rotary motor.

近年、回転電動機の小型化、高出力化が進んでいる。それに伴い、回転電動機内部での発熱量の増加が課題となっている。回転電動機内部の発熱の主なものとしては、ステータコイルに通電することによるステータコイルの発熱（銅損）と、ステータコア、ロータコア等の磁性体に渦電流が発生することによる発熱（鉄損）とが挙げられる。これらの発熱によって温度上昇した回転電動機の内部、特にステータコイルおよびステータコアを効率良く冷却することが、回転電動機の出力を向上させる上で重要である。   In recent years, rotating motors have been reduced in size and output. Along with this, an increase in the amount of heat generated in the rotary motor has become a problem. The main heat generation inside the rotary motor is the heat generation of the stator coil (copper loss) caused by energizing the stator coil and the heat generation (iron loss) caused by eddy currents generated in the magnetic material such as the stator core and rotor core. Is mentioned. In order to improve the output of the rotary motor, it is important to efficiently cool the inside of the rotary motor whose temperature has been increased by the heat generation, in particular, the stator coil and the stator core.

回転電動機の内部を冷却する手法として、例えば以下の提案がなされている。
（１）特許文献１
インシュレータと称している絶縁ボビンのコイル外周側に、コイルエンドより突出したＬ字状の案内板を設け、コイルエンドの上方から噴出される冷却液をコイルエンドに流すことで、コイルエンドを均一に冷却することが提案されている。具体的には、絶縁ボビンのＬ字状の案内板に、径方向に貫通する孔が設けられており、コイルエンドの上方から噴出される冷却液を案内板が受け、この案内板で受けられた冷却液が前記孔を通ってコイルエンドに浸透することで、コイルエンドを冷却する。なお、絶縁ボビンは、ステータコアのティースに嵌合し外周にコイルが巻回される本体部と、この本体部の径方向外側に配置された前記Ｌ字状の案内板とを有する。本体部の径方向内側には、径方向外側のような案内板が設けられていない。 For example, the following proposals have been made as a method of cooling the inside of the rotary motor.
(1) Patent Document 1
An L-shaped guide plate that protrudes from the coil end is provided on the outer peripheral side of the coil of an insulating bobbin called an insulator, and the coolant is sprayed from above the coil end to flow the coil end uniformly. It has been proposed to cool. Specifically, a hole penetrating in the radial direction is provided in the L-shaped guide plate of the insulating bobbin, and the guide plate receives the coolant sprayed from above the coil end, and can be received by this guide plate. The cooled liquid penetrates the coil end through the hole, thereby cooling the coil end. The insulating bobbin includes a main body portion that is fitted to the teeth of the stator core and has a coil wound around the outer periphery thereof, and the L-shaped guide plate that is disposed on the radially outer side of the main body portion. No guide plate is provided on the radially inner side of the main body portion as on the radially outer side.

（２）特許文献２
コイルエンドをボビンにより密封構造とし、ボビン上部にコイルエンドに通じる貫通孔を設け、この貫通孔に冷却媒体を流すことで、コイルエンドに冷却媒体を行き渡らせることが提案されている。 (2) Patent Document 2
It has been proposed that the coil end has a sealed structure with a bobbin, a through hole leading to the coil end is provided in the upper part of the bobbin, and the cooling medium is made to flow through the through hole to spread the cooling medium to the coil end.

特開２０１４−１０７８７４号公報JP 2014-107874 A 特開２０１０−２３９７７５号公報JP 2010-239775 A

特許文献１の手法は、コイルエンドの上方から放出された冷却液が、各絶縁ボビンの外径側に形成された流路を伝って下方に流れると共に、絶縁ボビンの孔からコイルエンドに流れることで、ステータの中心軸よりも上部のコイルエンドを冷却する。しかし、コイルエンドを流れる冷却液はコイル間の隙間を通るため、コイルが密に巻かれている場合、冷却液の流れが悪くなって、コイルエンドを十分に冷却ができない可能性がある。また、単にコイルエンドのコイル間の隙間に冷却液を流すだけでは、熱が籠り易いコイルエンドの内周側の部分を効率良く冷却できない。   In the method of Patent Document 1, the coolant discharged from above the coil end flows downward along the flow path formed on the outer diameter side of each insulating bobbin and flows from the hole of the insulating bobbin to the coil end. Thus, the coil end above the central axis of the stator is cooled. However, since the coolant flowing through the coil end passes through the gap between the coils, when the coil is tightly wound, the flow of the coolant may deteriorate and the coil end may not be sufficiently cooled. In addition, simply flowing the coolant through the gap between the coils at the coil end cannot efficiently cool the inner peripheral side portion of the coil end where heat is easily generated.

特許文献２の手法は、ボビンを利用してコイルエンドを密閉し、コイルエンドの周囲を冷却媒体で満たして、コイルエンドを冷却するようにしている。しかし、コイルエンドを密閉すると、ボビンの構造が複雑となる。また、冷却媒体の供給口が片方のコイルエンドにのみ存在するため、供給口の無いコイルエンドは十分に冷却されない可能性がある。ステータコアの冷却については言及されていない。   In the method of Patent Document 2, the coil end is hermetically sealed using a bobbin, and the coil end is filled with a cooling medium to cool the coil end. However, when the coil end is sealed, the structure of the bobbin becomes complicated. Moreover, since the supply port for the cooling medium exists only at one coil end, the coil end without the supply port may not be sufficiently cooled. There is no mention of cooling of the stator core.

この発明の目的は、ステータコアの外径側から供給される冷却液によって、ステータコイルを効率良く冷却することができる回転電動機の絶縁ボビンを提供することである。   An object of the present invention is to provide an insulating bobbin for a rotary motor that can efficiently cool a stator coil with a coolant supplied from the outer diameter side of the stator core.

この発明の回転電動機の絶縁ボビンは、回転電動機における環状のステータコアの内周部に並ぶ複数の歯部とこの歯部の外周に巻回状態で配置される導線とを絶縁する絶縁ボビンであって、
前記歯部が挿入される歯部挿入孔が形成され外周面に前記導線が積層状に巻かれる筒状の導線巻回部と、この導線巻回部における前記ステータコアの径方向の外径端および内径端からそれぞれ前記導線の積層方向に沿って突出する外径側鍔部および内径側鍔部とを有し、前記導線巻回部における前記ステータコアの軸方向を向く外周面部分に前記ステータコアの径方向に延びる外周溝が形成され、かつ前記外径側鍔部に前記ステータコアの径方向に貫通し前記外周溝に連通する第１の貫通孔が形成されていることを特徴とする。 An insulating bobbin for a rotary electric motor according to the present invention is an insulating bobbin that insulates a plurality of tooth portions arranged on the inner peripheral portion of an annular stator core in a rotary electric motor and a conductive wire arranged in a wound state on the outer periphery of the tooth portion. ,
A cylindrical lead wire winding part in which a tooth part insertion hole into which the tooth part is inserted is formed and the conductive wire is wound in a laminated form on the outer peripheral surface, a radial outer diameter end of the stator core in the conductive wire winding part, and An outer diameter side flange and an inner diameter side flange projecting from the inner diameter end along the direction in which the conductors are laminated, and the diameter of the stator core on the outer peripheral surface portion facing the axial direction of the stator core in the conductor winding portion An outer circumferential groove extending in the direction is formed, and a first through hole penetrating in the radial direction of the stator core and communicating with the outer circumferential groove is formed in the outer diameter side flange.

この構成によると、ステータコア径方向の外径側から冷却液が供給された場合、その冷却液が絶縁ボビンの外径側鍔部の外径面で受けられる。外径側鍔部の外径面で受けられた冷却液は、外径側鍔部の第１の貫通孔を通って、導線巻回部の外周面に形成された外周溝に浸入する。外周溝は、コイルエンドの内周面に接している。このため、冷却液が外周溝をステータコア径方向の内径側へ流れる間に、コイルエンドが熱の籠り易い内周側から冷却される。また、外周溝を流れる間に一部の冷却液はコイルエンドの導線間の隙間に浸透して、コイルエンドを内部からも冷却する。   According to this configuration, when the cooling liquid is supplied from the outer diameter side in the stator core radial direction, the cooling liquid is received by the outer diameter surface of the outer diameter side flange of the insulating bobbin. The coolant received by the outer diameter surface of the outer diameter side flange passes through the first through hole of the outer diameter side flange and enters the outer peripheral groove formed on the outer peripheral surface of the conductor winding portion. The outer peripheral groove is in contact with the inner peripheral surface of the coil end. For this reason, the coil end is cooled from the inner peripheral side where heat is easily generated while the coolant flows through the outer peripheral groove to the inner diameter side in the stator core radial direction. Further, while flowing through the outer peripheral groove, a part of the cooling liquid penetrates into the gap between the coil ends and cools the coil end from the inside.

この発明において、前記外径側鍔部における前記導線巻回部から前記ステータコアの軸方向に延びるコイルエンド外径側部位に、前記ステータコアの径方向に貫通する第２の貫通孔が形成されていてもよい。
この場合、絶縁ボビンの外径側鍔部の外径面で受けられた冷却油は、第１の貫通孔を通って外周溝に浸入する他に、第２の貫通孔を通ってコイルエンドの外径側から導線間の隙間に浸透する。これにより、コイルエンド全体に冷却液が良く行き渡り、コイルエンドをより一層効率良く冷却することができる。 In the present invention, a second through hole penetrating in the radial direction of the stator core is formed in a coil end outer diameter side portion extending in the axial direction of the stator core from the conductor winding portion in the outer diameter side flange portion. Also good.
In this case, the cooling oil received on the outer diameter surface of the outer diameter side flange of the insulating bobbin enters the outer peripheral groove through the first through hole, and also passes through the second through hole to the coil end. It penetrates into the gap between the conductors from the outer diameter side. As a result, the coolant spreads well over the entire coil end, and the coil end can be cooled more efficiently.

前記第２の貫通孔を有する場合、前記第１の貫通孔および前記第２の貫通孔は、前記ステータコアの軸心に対する円周方向の位置が互いにずれて配置されていると良い。
つまり、第１の貫通孔と第２の貫通孔は千鳥状の配置となる。このように、千鳥状の配置とすることにより、外径側鍔部のステータコア軸方向の幅を必要以上に広くすることなく、外径側鍔部に第１の貫通孔および第２の貫通孔を設けることができる。 When the second through hole is provided, it is preferable that the first through hole and the second through hole are arranged so that their circumferential positions with respect to the axis of the stator core are shifted from each other.
That is, the first through hole and the second through hole are staggered. As described above, the staggered arrangement allows the first through hole and the second through hole in the outer diameter side flange without increasing the width of the outer diameter side flange in the stator core axial direction more than necessary. Can be provided.

この発明において、前記導線巻回部における前記ステータコアの軸方向を向く面に対向する内周面部分に前記ステータコアの径方向に延びる内周溝が形成されていてもよい。
この場合、外径側鍔部の外径面で受けられた冷却油の一部が、内周溝を通ってステータコアの歯部と絶縁ボビンの導線巻回部との間を流れる。これにより、ステータコアを効率良く冷却することができる。 In this invention, the inner peripheral groove | channel extended in the radial direction of the said stator core may be formed in the inner peripheral surface part which opposes the surface which faces the axial direction of the said stator core in the said conducting wire winding part.
In this case, a part of the cooling oil received on the outer diameter surface of the outer diameter side flange portion flows between the tooth portion of the stator core and the conductive wire winding portion of the insulating bobbin through the inner peripheral groove. Thereby, the stator core can be efficiently cooled.

前記内周溝および前記外周溝は、前記ステータコアの軸心に対する円周方向の位置が互いにずれて配置されていると良い。
つまり、内周溝と外周溝は千鳥状の配置となる。このように、千鳥状の配置とすることにより、導線巻回部の肉厚を必要以上に厚くすることなく、導線巻回部に内周溝および外周溝を設けることができる。 The inner circumferential groove and the outer circumferential groove may be arranged such that their circumferential positions with respect to the axis of the stator core are shifted from each other.
That is, the inner circumferential groove and the outer circumferential groove are staggered. As described above, the staggered arrangement allows the inner and outer grooves to be provided in the conductor winding portion without making the conductor winding portion thicker than necessary.

この発明において、前記外径側鍔部における前記コイルエンド外径側部位の先端に前記ステータコアの径方向の外径側に突出する突条が形成されていても良い。
突条が形成されていると、外径側鍔部で受けられた冷却液がコイルエンド外径側部位の先端から流れ出にくく、外径側鍔部の外径面上に冷却液を留めることができる。このため、第１の貫通孔に多くの冷却液を浸入させることができる。第２の貫通孔および内周溝を有する場合には、これら第２の貫通孔および内周溝にも多くの冷却液を浸入させることができる。 In this invention, the protrusion which protrudes to the outer-diameter side of the radial direction of the said stator core may be formed in the front-end | tip of the said coil end outer-diameter side site | part in the said outer-diameter side collar part.
When the ridge is formed, the coolant received at the outer diameter side flange is difficult to flow out from the tip of the coil end outer diameter side portion, and the coolant may be retained on the outer diameter surface of the outer diameter side flange. it can. For this reason, a lot of coolant can be made to enter the first through hole. When the second through hole and the inner peripheral groove are provided, a large amount of cooling liquid can be caused to enter the second through hole and the inner peripheral groove.

この発明の回転電動機の絶縁ボビンは、回転電動機における環状のステータコアの内周部に並ぶ複数の歯部とこの歯部の外周に巻回状態で配置される導線とを絶縁する絶縁ボビンであって、前記歯部が挿入される歯部挿入孔が形成され外周面に前記導線が積層状に巻かれる筒状の導線巻回部と、この導線巻回部における前記ステータコアの径方向の外径端および内径端からそれぞれ前記導線の積層方向に沿って突出する外径側鍔部および内径側鍔部とを有し、前記導線巻回部における前記ステータコアの軸方向を向く外周面部分に前記ステータコアの径方向に延びる外周溝が形成され、かつ前記外径側鍔部に前記ステータコアの径方向に貫通し前記外周溝に連通する第１の貫通孔が形成されているため、ステータコアの外径側から供給される冷却液によって、ステータコイルを効率良く冷却することができる。   An insulating bobbin for a rotary electric motor according to the present invention is an insulating bobbin that insulates a plurality of tooth portions arranged on the inner peripheral portion of an annular stator core in a rotary electric motor and a conductive wire arranged in a wound state on the outer periphery of the tooth portion. A cylindrical lead wire winding portion in which a tooth portion insertion hole into which the tooth portion is inserted is formed and the lead wire is wound in a laminated manner on the outer peripheral surface, and a radial outer diameter end of the stator core in the lead wire winding portion And an outer diameter side flange and an inner diameter side flange projecting from the inner diameter end along the direction of lamination of the conductor, respectively, and an outer peripheral surface portion of the stator core facing the axial direction of the stator core in the conductor winding portion. An outer circumferential groove extending in the radial direction is formed, and a first through hole penetrating in the radial direction of the stator core and communicating with the outer circumferential groove is formed in the outer diameter side flange, so that from the outer diameter side of the stator core Supplied By 却液 can the stator coil efficiently cooled.

この発明の一実施形態に係る絶縁ボビンを備えた回転電動機の縦断面図である。It is a longitudinal cross-sectional view of the rotary electric motor provided with the insulation bobbin which concerns on one Embodiment of this invention. 同回転電動機のステータを中心軸方向から見た図である。It is the figure which looked at the stator of the rotation electric motor from the central axis direction. 同回転電動機の一部の縦断面図である。It is a longitudinal cross-sectional view of a part of the rotary electric motor. 同回転電動機の異なる一部の縦断面図である。It is a longitudinal cross-sectional view of a part of the same rotating electric motor. 同回転電動機のステータの絶縁ボビンを外径側から見た図である。It is the figure which looked at the insulation bobbin of the stator of the rotary electric motor from the outer diameter side. 同絶縁ボビンを径方向と垂直な平面で切断した断面図である。It is sectional drawing which cut | disconnected the insulation bobbin by the plane perpendicular | vertical to a radial direction. 同絶縁ボビンの一方のボビン分割体をコイルエンド側から見た図である。It is the figure which looked at one bobbin division body of the insulation bobbin from the coil end side. 同ボビン分割体をステータコア側から見た図である。It is the figure which looked at the bobbin division body from the stator core side. 同絶縁ボビンとステータコア用部品の斜視図である。It is a perspective view of the insulation bobbin and the components for stator cores. 同絶縁ボビンとステータコア用部品を図９とは異なる方向から見た斜視図である。FIG. 10 is a perspective view of the insulating bobbin and the stator core component as viewed from a direction different from FIG. 9. 同一対のボビン分割体を組み合わせる前の状態を示す絶縁ボビンとステータコア用部品の斜視図である。It is a perspective view of the components for an insulation bobbin and a stator core which show the state before combining the same pair of bobbin division body. 異なる絶縁ボビンの片方のボビン分割体の斜視図である。It is a perspective view of one bobbin division body of a different insulation bobbin. 同ボビン分割体を他の方向から見た斜視図である。It is the perspective view which looked at the bobbin division body from the other direction. 同絶縁ボビンを備えた図１のものとは異なる回転電動機の断面図である。It is sectional drawing of the rotary electric motor different from the thing of FIG. 1 provided with the same insulation bobbin.

この発明の一実施形態に係る絶縁ボビンを備えた回転電動機を図１ないし図１１と共に説明する。
図１は回転電動機の縦断面図である。図１に示すように、この回転電動機は、横向きに配置された回転軸１と、この回転軸１に一体に固定されたロータ２と、このロータ２の外周に配置されたステータ３と、このステータ３を覆って固定するハウジング４とを備える。ロータ２とステータ３との間には、ラジアルギャップが設けられている。 A rotary motor including an insulating bobbin according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a longitudinal sectional view of a rotary motor. As shown in FIG. 1, the rotary electric motor includes a rotary shaft 1 that is disposed sideways, a rotor 2 that is integrally fixed to the rotary shaft 1, a stator 3 that is disposed on the outer periphery of the rotor 2, And a housing 4 that covers and fixes the stator 3. A radial gap is provided between the rotor 2 and the stator 3.

ハウジング４は、一端面が開口したメインハウジング４ａと、このメインハウジング４ａの開口端面を塞ぐサイドハウジング４ｂとでなる。メインハウジング４ａとサイドハウジング４ｂとはハウジング固定ボルト５で固定される。回転軸１は、メインハウジング４ａおよびサイドハウジング４ｂにそれぞれ設けられた転がり軸受（玉軸受）６，７によって回転自在に支持されている。転がり軸受６の内輪と回転軸１の段部１ａとの間に予圧ばね８が介在しており、この予圧ばね８によって転がり軸受６，７に所定の予圧を付与している。メインハウジング４ａと回転軸１との間の隙間にはオイルシール９が設けられている。   The housing 4 includes a main housing 4a whose one end face is open and a side housing 4b which closes the open end face of the main housing 4a. The main housing 4a and the side housing 4b are fixed by a housing fixing bolt 5. The rotary shaft 1 is rotatably supported by rolling bearings (ball bearings) 6 and 7 provided in the main housing 4a and the side housing 4b, respectively. A preload spring 8 is interposed between the inner ring of the rolling bearing 6 and the step portion 1 a of the rotating shaft 1, and a predetermined preload is applied to the rolling bearings 6 and 7 by the preload spring 8. An oil seal 9 is provided in the gap between the main housing 4a and the rotary shaft 1.

ロータ２は、ロータコア１０と、このロータコア１０に内蔵された複数の永久磁石１１とを有する。永久磁石１１は、円周方向一定間隔おきに配列されている。回転軸１へのロータ２の固定は、回転軸１と一体に形成されたロータ固定用部材１２の筒状部１２ａの外周にロータコア１０を嵌合させると共に、ロータ固定用部材１２のフランジ部１２ｂと磁石押え部材１３とでロータコア１０および永久磁石１１をモータ軸方向の両側から挟み付けて行う。磁石押え部材１３は、ロータ固定ボルト１４によってロータ固定用部材１２の筒状部１２ａに固定される。この実施形態では、ロータ固定用部材１２が回転軸１と一体に形成されているが、ロータ固定用部材１２は回転軸１と別体であってもよい。なお、前記モータ軸方向は、回転軸１の軸心Ｏ方向のことである。   The rotor 2 includes a rotor core 10 and a plurality of permanent magnets 11 built in the rotor core 10. The permanent magnets 11 are arranged at regular intervals in the circumferential direction. The rotor 2 is fixed to the rotating shaft 1 by fitting the rotor core 10 to the outer periphery of the cylindrical portion 12a of the rotor fixing member 12 formed integrally with the rotating shaft 1 and the flange portion 12b of the rotor fixing member 12. And the magnet pressing member 13 sandwich the rotor core 10 and the permanent magnet 11 from both sides in the motor axial direction. The magnet pressing member 13 is fixed to the cylindrical portion 12 a of the rotor fixing member 12 by the rotor fixing bolt 14. In this embodiment, the rotor fixing member 12 is formed integrally with the rotating shaft 1, but the rotor fixing member 12 may be separate from the rotating shaft 1. The motor shaft direction is the direction of the axis O of the rotary shaft 1.

ステータ３は、ステータコア２０とステータコイル２１とからなる。ステータコア２０は、例えば軟質磁性材料からなる。
図２はステータ３を中心軸方向から見た図である。同図に示すように、ステータコア２０は、円環状部２０ａの内周に、複数の歯部２０ｂが回転軸１（図１参照）の軸心Ｏ回りに放射状に並んで形成されている。歯部２０ｂをモータ径方向と垂直な平面で切断した断面の形状（図示せず）は、例えば矩形である。円環状部２０ａの外周には、ステータ３の軸方向に延びる複数のステータ固定ボルト挿入用の切欠き２２が設けられている。なお、前記モータ径方向は、回転軸１（図１）の軸心Ｏに直交する方向のことであり、組立状態におけるステータコア２０の径方向と一致する。また、組立状態におけるステータコア２０の軸方向は、モータ軸方向と一致する。 The stator 3 includes a stator core 20 and a stator coil 21. The stator core 20 is made of, for example, a soft magnetic material.
FIG. 2 is a view of the stator 3 as viewed from the central axis direction. As shown in the figure, the stator core 20 is formed with a plurality of teeth 20b arranged radially around the axis O of the rotary shaft 1 (see FIG. 1) on the inner periphery of the annular portion 20a. The cross-sectional shape (not shown) obtained by cutting the tooth portion 20b along a plane perpendicular to the motor radial direction is, for example, a rectangle. A plurality of stator fixing bolt insertion notches 22 extending in the axial direction of the stator 3 are provided on the outer periphery of the annular portion 20a. The motor radial direction is a direction orthogonal to the axis O of the rotating shaft 1 (FIG. 1) and coincides with the radial direction of the stator core 20 in the assembled state. Further, the axial direction of the stator core 20 in the assembled state coincides with the motor axial direction.

この実施形態のステータコア２０は、同形をした複数個のステータコア用部品２３を円周方向に並べて組み合わせて構成される。各ステータコア用部品２３は、前記歯部２０ｂおよびステータ固定ボルト挿入用の切欠き２２をそれぞれ１つずつ有する。隣合うステータコア用部品２３は、係合凸部２３ａと係合凹部２３ｂとが互いに係合することで組み合わされる。   The stator core 20 of this embodiment is configured by arranging a plurality of stator core components 23 having the same shape in a circumferential direction. Each stator core component 23 has one tooth portion 20b and one notch 22 for inserting a stator fixing bolt. Adjacent stator core components 23 are combined when the engaging convex portion 23a and the engaging concave portion 23b engage with each other.

このように、ステータコア２０は複数のステータコア用部品２３で構成され、図１のようにハウジング４内に設置される。すなわち、円環部２０ａをメインハウジング４ａの内周に嵌合させると共に、円環部２０ａの一端面をメインハウジング４ａの段面２４に当接させる。そして、複数のステータ固定ボルト挿入用の切欠き２２のうち任意の複数箇所の切欠き２２にステータ固定ボルト２５を挿通し、そのステータ固定ボルト２５を段面２４のねじ孔２６にねじ込むことで、ステータコア２０をハウジング４に固定する。   Thus, the stator core 20 is composed of a plurality of stator core components 23 and is installed in the housing 4 as shown in FIG. That is, the annular portion 20a is fitted to the inner periphery of the main housing 4a, and one end surface of the annular portion 20a is brought into contact with the step surface 24 of the main housing 4a. Then, by inserting the stator fixing bolt 25 into the notches 22 at arbitrary plural positions among the plurality of notches 22 for inserting the stator fixing bolts, and screwing the stator fixing bolt 25 into the screw holes 26 of the step surface 24, The stator core 20 is fixed to the housing 4.

図２において、ステータコイル２１は、巻回形式が集中巻であって、ステータコア２０の各歯部２０ｂに設けられた複数の個別コイル３０からなる。各個別コイル３０は、歯部２０ｂの外周を囲む絶縁ボビン３１と、この絶縁ボビン３１に積層状に巻かれた導線３２とでなる。絶縁ボビン３１は、歯部２０ｂとその外周に巻回状態で配置される導線３２とを絶縁する役割をする。   In FIG. 2, the stator coil 21 is a concentrated winding type and includes a plurality of individual coils 30 provided on each tooth portion 20 b of the stator core 20. Each individual coil 30 includes an insulating bobbin 31 that surrounds the outer periphery of the tooth portion 20b, and a conductive wire 32 wound around the insulating bobbin 31 in a laminated manner. The insulating bobbin 31 serves to insulate the tooth portion 20b from the conducting wire 32 that is disposed in a wound state on the outer periphery thereof.

図３、図４は回転電動機の一部のそれぞれ異なる縦断面図であり、ステータコア２０と絶縁ボビン３１と導線３２とが図示されている。これらの図に示すように、絶縁ボビン３１は、ステータコア２０の歯部２０ｂが挿入される歯部挿入孔３３が形成され外周面に導線３２が積層状に巻かれる筒状の導線巻回部３１ａと、この導線巻回部３１ａのモータ径方向の外径端および内径端からそれぞれ導線３２の積層方向に沿って突出する外径側鍔部３１ｂおよび内径側鍔部３１ｃとを有する。   3 and 4 are different longitudinal sectional views of a part of the rotary electric motor, in which the stator core 20, the insulating bobbin 31, and the conducting wire 32 are illustrated. As shown in these drawings, the insulating bobbin 31 has a cylindrical wire winding portion 31a in which a tooth portion insertion hole 33 into which the tooth portion 20b of the stator core 20 is inserted is formed, and a conductive wire 32 is wound around the outer peripheral surface in a laminated form. And an outer diameter side flange 31b and an inner diameter side flange 31c projecting along the lamination direction of the conductor 32 from the outer diameter end and the inner diameter end of the conductor winding portion 31a in the motor radial direction, respectively.

図３、図４では、外径側鍔部３１ｂとして、導線巻回部３１ａからモータ軸方向に延びるコイルエンド外径側部位３１ｂａが図示されている。同様に、内径側鍔部３１ｃとして、導線巻回部３１ａからモータ軸方向に延びるコイルエンド内径側部位３１ｃａが図示されている。これらコイルエンド外径側部位３１ｂａとコイルエンド内径側部位３１ｃａとの間に、個別コイル３０のコイルエンド３０ａが位置する。コイルエンド外径側部位３１ｂａおよびコイルエンド内径側部位３１ｃａは、導線巻回部３１ａに対してモータ軸方向の両側に配置されている。   3 and 4, a coil end outer diameter side portion 31ba extending from the wire winding portion 31a in the motor axial direction is illustrated as the outer diameter side flange portion 31b. Similarly, a coil end inner diameter side portion 31ca extending in the motor axial direction from the conductive wire winding portion 31a is illustrated as the inner diameter side flange 31c. The coil end 30a of the individual coil 30 is located between the coil end outer diameter side portion 31ba and the coil end inner diameter side portion 31ca. The coil end outer diameter side portion 31ba and the coil end inner diameter side portion 31ca are disposed on both sides in the motor axial direction with respect to the conductor winding portion 31a.

外径側鍔部３１ｂのコイルエンド外径側部位３１ｂａの先端には、外径側に突出する突条３５が形成されている。また、絶縁ボビン３１には、以下の第１の貫通孔３６（図３）、外周溝３７（図３）、第２の貫通孔３８（図４）、および内周溝３９（図４）がそれぞれ形成されている。   At the tip of the coil end outer diameter side portion 31ba of the outer diameter side flange 31b, a ridge 35 protruding to the outer diameter side is formed. The insulating bobbin 31 has the following first through hole 36 (FIG. 3), outer peripheral groove 37 (FIG. 3), second through hole 38 (FIG. 4), and inner peripheral groove 39 (FIG. 4). Each is formed.

図３において、第１の貫通孔３６は、外径側鍔部３１ｂのコイルエンド外径側部位３１ｂａと導線巻回部３１ａとの境界部に位置し、モータ径方向（ステータコア２０の径方向）に貫通している。第１の貫通孔３６は、例えば円形孔である。外周溝３７は、導線巻回部３１ａにおけるモータ軸方向（ステータコア２０の軸方向）を向く外周面部分に形成されモータ径方向に延びる溝であり、外径端が第１の貫通孔３６に連通している。外周溝３７は、例えば角溝である。   In FIG. 3, the first through hole 36 is located at the boundary between the coil end outer diameter side portion 31ba of the outer diameter side flange 31b and the conductor winding portion 31a, and is in the motor radial direction (radial direction of the stator core 20). Has penetrated. The first through hole 36 is, for example, a circular hole. The outer circumferential groove 37 is a groove formed in the outer circumferential surface portion facing the motor axial direction (axial direction of the stator core 20) in the conductor winding portion 31 a and extending in the motor radial direction, and the outer diameter end communicates with the first through hole 36. doing. The outer peripheral groove 37 is, for example, a square groove.

図４において、第２の貫通孔３８は、コイルエンド外径側部位３１ｂａのモータ軸方向中間部に位置し、モータ径方向に貫通している。第２の貫通孔３１は、例えば円形孔である。内周溝３９は、導線巻回部３１ａのモータ軸方向を向く内周面部分に形成され、モータ径方向に延びている。内周溝３９は、例えば角溝である。   In FIG. 4, the second through hole 38 is located in the motor axial direction intermediate portion of the coil end outer diameter side portion 31ba and penetrates in the motor radial direction. The second through hole 31 is, for example, a circular hole. The inner circumferential groove 39 is formed in an inner circumferential surface portion of the conducting wire winding portion 31a facing the motor axial direction and extends in the motor radial direction. The inner peripheral groove 39 is, for example, a square groove.

図５は絶縁ボビン３１を外径側から見た図である。第１の貫通孔３６は、コイルエンド外径側部位３１ｂａの周方向における導線巻回部３１ａと接する範囲に複数設けられている。第２の貫通孔３８は、外径側鍔部３１ｂのコイルエンド外径側部位３１ｂａの周方向における広い範囲に亘って複数設けられている。これら第１の貫通孔３６と第２の貫通孔３８とは、互いに千鳥状に配置されている。このように、第１の貫通孔３６と第２の貫通孔３８とを千鳥状に配置することにより、外径側鍔部３１ｂのモータ軸方向の幅を必要以上に広くすることなく、外径側鍔部３１ｂに第１の貫通孔３６および第２の貫通孔３８を設けることができる。
なお、図３に示される絶縁ボビン３１は図５のIII−III断面であり、図４に示される絶縁ボビン３１は図５のIV−IV断面である。 FIG. 5 is a view of the insulating bobbin 31 as seen from the outer diameter side. A plurality of first through holes 36 are provided in a range in contact with the conductor winding portion 31a in the circumferential direction of the coil end outer diameter side portion 31ba. A plurality of second through holes 38 are provided over a wide range in the circumferential direction of the coil end outer diameter side portion 31ba of the outer diameter side flange 31b. The first through holes 36 and the second through holes 38 are arranged in a staggered manner. Thus, by arranging the first through hole 36 and the second through hole 38 in a staggered manner, the outer diameter of the outer diameter side flange 31b is increased more than necessary without increasing the width in the motor axial direction. The first through hole 36 and the second through hole 38 can be provided in the side flange portion 31b.
The insulating bobbin 31 shown in FIG. 3 is the III-III cross section of FIG. 5, and the insulating bobbin 31 shown in FIG. 4 is the IV-IV cross section of FIG.

図６は絶縁ボビン３１を径方向と垂直な平面で切断した断面図である。外周溝３７は、導線巻回部３１ａの外周面に、外径側から見て第１の貫通孔３６と同位置に複数設けられている。内周溝３９は、導線巻回部３１ａの外周面における外周溝３７と千鳥状の配置となる位置に複数設けられている。このように、内周溝３９と外周溝３７とを千鳥状に配置することにより、導線巻回部３１ａの肉厚を必要以上に厚くすることなく、導線巻回部３１ａに内周溝３９および外周溝３７を設けることができる。   FIG. 6 is a cross-sectional view of the insulating bobbin 31 cut along a plane perpendicular to the radial direction. A plurality of outer peripheral grooves 37 are provided on the outer peripheral surface of the conductor winding portion 31a at the same position as the first through hole 36 as viewed from the outer diameter side. A plurality of inner circumferential grooves 39 are provided at positions that are staggered with the outer circumferential grooves 37 on the outer circumferential surface of the conductor winding portion 31a. Thus, by arranging the inner peripheral groove 39 and the outer peripheral groove 37 in a staggered manner, the inner peripheral groove 39 and the inner peripheral groove 39a are not formed in the conductive wire winding part 31a without increasing the thickness of the conductive wire winding part 31a more than necessary. An outer peripheral groove 37 can be provided.

図５、図６に示すように、絶縁ボビン３１は、モータ軸方向に２分割された互いに対称形状の２つのボビン分割体３１Ａ，３１Ｂからなる。２つのボビン分割体３１Ａ，３１Ｂを組み合わせることで、導線巻回部３１ａが筒状に形成される。各ボビン分割体３１Ａ，３１Ｂは、コイルエンド外径側部位３１ｂａおよびコイルエンド内径側部位３１ｃａを１つずつ有する。図６に示すように、各ボビン分割体３１Ａ，３１Ｂの接合部は、ボビン分割体３１Ａ，３１Ｂにそれぞれ設けられた内周側接合部４１と外周側接合部４２とが互いに重なった状態となる。このため、図２のようにステータ３として組み立てた場合に、ステータコア２０と導線３２との絶縁を確保することができる。   As shown in FIGS. 5 and 6, the insulating bobbin 31 includes two bobbin divided bodies 31 </ b> A and 31 </ b> B that are divided into two in the motor shaft direction and have symmetrical shapes. By combining the two bobbin divided bodies 31A and 31B, the conductive wire winding part 31a is formed in a cylindrical shape. Each bobbin divided body 31A, 31B has one coil end outer diameter side portion 31ba and one coil end inner diameter side portion 31ca. As shown in FIG. 6, the joint portions of the bobbin divided bodies 31 </ b> A and 31 </ b> B are in a state in which the inner peripheral side joint portion 41 and the outer peripheral side joint portion 42 provided on the bobbin split bodies 31 </ b> A and 31 </ b> B overlap each other. . For this reason, when the stator 3 is assembled as shown in FIG. 2, insulation between the stator core 20 and the conductive wire 32 can be ensured.

ステータ３の組立てに際しては、図９〜図１１に示すように、先に各ステータコア用部品２３の歯部２０ｂに絶縁ボビン３１を取り付けてから、絶縁ボビン３１付きの各ステータコア用部品２３を互いに組み合わせる。なお、図９は絶縁ボビン３１とステータコア用部品２３の斜視図、図１０は絶縁ボビン３１とステータコア用部品２３を異なる方向から見た斜視図、図１１は一対のボビン分割体３１Ａ，３１Ｂを組み合わせる前の状態を示す絶縁ボビン３１とステータコア用部品２３の斜視図である。   When assembling the stator 3, as shown in FIGS. 9 to 11, the insulating bobbins 31 are first attached to the tooth portions 20 b of the stator core components 23, and then the stator core components 23 with the insulating bobbins 31 are combined with each other. . 9 is a perspective view of the insulating bobbin 31 and the stator core component 23, FIG. 10 is a perspective view of the insulating bobbin 31 and the stator core component 23 seen from different directions, and FIG. 11 is a combination of a pair of bobbin divided bodies 31A and 31B. FIG. 5 is a perspective view of an insulating bobbin 31 and a stator core component 23 showing a previous state.

図７、図８に示すように、内径側鍔部３１ｃの内径面４３は、回転軸１の軸心Ｏ（図１）を中心とする円弧状である。また、図８に示すように、外径側鍔部３１ｂの外径面４４は、導線巻回部３１ａと接する範囲の部分４４ａは平面状で、その両側部分４４ｂは回転軸１の軸心Ｏを中心とする円弧状である。   As shown in FIGS. 7 and 8, the inner diameter surface 43 of the inner diameter side flange 31 c has an arc shape centered on the axis O (FIG. 1) of the rotating shaft 1. Further, as shown in FIG. 8, the outer diameter surface 44 of the outer diameter side flange 31b is a flat portion 44a in a range in contact with the conductor winding portion 31a, and both side portions 44b are the axis O of the rotating shaft 1. It has an arc shape centered at.

外径側鍔部３１ｂの円周方向の側面４５および内径側鍔部３１ｃの円周方向の側面４６は回転軸１の軸心Ｏを通る平面であり、ステータコア２０の各歯部２０ｂに絶縁ボビン３１を取り付けた状態では、図２に示すように、隣合う絶縁ボビン３１の外径側鍔部３１ｂ同士および内径側鍔部３１ｃ同士がそれぞれ互いに隙間無く接する。   The circumferential side surface 45 of the outer diameter side flange 31b and the circumferential side surface 46 of the inner diameter side flange 31c are planes passing through the axis O of the rotating shaft 1, and are insulated bobbins on the teeth 20b of the stator core 20. 2, the outer diameter side flanges 31b and the inner diameter side flanges 31c of the adjacent insulating bobbins 31 are in contact with each other without a gap as shown in FIG.

図の例では、すべての絶縁ボビン３１について、隣合う絶縁ボビン３１の外径側鍔部３１ｂ同士および内径側鍔部３１ｃ同士がそれぞれ互いに隙間無く接している。上部に位置する個別コイル３０の絶縁ボビン３１のみが隙間無く接するようにしてもよい。前記上部に位置する個別コイル３０とは、必ずしも上側半周のすべての個別コイル３０でなくてもよく、例えば上端を含む１／４〜１／３周の個別コイル３０であってもよい。   In the illustrated example, the outer diameter side flanges 31b and the inner diameter side flanges 31c of the adjacent insulating bobbins 31 are in contact with each other without any gaps. Only the insulating bobbin 31 of the individual coil 30 located at the top may be in contact with no gap. The individual coils 30 located in the upper part are not necessarily all the individual coils 30 on the upper half circumference, and may be, for example, the individual coils 30 having a quarter to ３ circumference including the upper end.

図１において、ハウジング４には、上部の個別コイル３０の絶縁ボビン３１上に冷却液を供給する冷却液供給手段５０が設けられている。冷却液としては、例えば油が使用される。冷却液供給手段５０は、メインハウジング４ａの上部に設けられた冷却液の供給口５１と、この供給口５１に連通してモータ軸方向に延びる流路５２と、この流路５２のモータ軸方向の両端付近とハウジング４の内部とを連通する滴下口５３，５４とを備える。滴下口５３，５４は、上部に位置する個別コイル３０の絶縁ボビン３１の上方に位置している。この実施形態の場合、最上位の個別コイル３０の絶縁ボビン３１における外径側鍔部３１ｂのコイルエンド外径側部位３１ｂａの真上に、滴下口５３，５４が位置する。前記供給口５１は、この回転電動機とは別設またはこの回転電動機に付属の冷却液供給装置（図示せず）を接続されている。   In FIG. 1, the housing 4 is provided with a coolant supply means 50 for supplying a coolant onto the insulating bobbin 31 of the upper individual coil 30. For example, oil is used as the cooling liquid. The coolant supply means 50 includes a coolant supply port 51 provided in the upper portion of the main housing 4a, a flow path 52 communicating with the supply port 51 and extending in the motor axial direction, and the motor axial direction of the flow path 52 Are provided with dripping ports 53 and 54 for communicating the vicinity of both ends and the inside of the housing 4. The dripping ports 53 and 54 are located above the insulating bobbin 31 of the individual coil 30 located at the upper part. In the case of this embodiment, the dripping ports 53 and 54 are located immediately above the coil end outer diameter side portion 31ba of the outer diameter side flange 31b in the insulating bobbin 31 of the uppermost individual coil 30. The supply port 51 is provided separately from the rotary motor or connected to a coolant supply device (not shown) attached to the rotary motor.

また、サイドハウジング４ｂの下部には、冷却液の排出口５５が設けられている。この排出口５５の上端位置は、ロータ２の下端位置よりも下位に位置している。排出口５５は、油溜り（図示せず）を経由して前記冷却液供給装置に接続されている。   Further, a cooling liquid discharge port 55 is provided at a lower portion of the side housing 4b. The upper end position of the discharge port 55 is positioned lower than the lower end position of the rotor 2. The discharge port 55 is connected to the coolant supply device via an oil reservoir (not shown).

この回転電動機における冷却液の流れについて説明する。
冷却液供給装置から送られてくる冷却液が、供給口５１および流路５２を通り、滴下口５３，５４から滴下される。滴下された冷却液は、最上位の絶縁ボビン３１の外径側鍔部３１ｂのコイルエンド外径側部位３１ｂａ（図３、図４）で受けられる。コイルエンド外径側部位３１ｂａで受けられた冷却液は、第１の貫通孔３６、第２の貫通孔３８、および内周溝３９に浸入して下方へ流れる。 The flow of the coolant in this rotary motor will be described.
The coolant sent from the coolant supply apparatus passes through the supply port 51 and the flow path 52 and is dropped from the dropping ports 53 and 54. The dropped coolant is received at the coil end outer diameter side portion 31ba (FIGS. 3 and 4) of the outer diameter side flange 31b of the uppermost insulating bobbin 31. The coolant received at the coil end outer diameter side portion 31ba enters the first through hole 36, the second through hole 38, and the inner peripheral groove 39 and flows downward.

コイルエンド外径側部位３１ｂａの先端に外径側に突出する突条３５が形成されているため、受けられた冷却液がコイルエンド外径側部位３１ｂａの先端側へ流れ出にくく、外径側鍔部３１ｂの上に冷却液を留めることができる。このため、第１の貫通孔３６、第２の貫通孔３８、および内周溝３９に多くの冷却液を浸入させることができる。   Since the protrusion 35 protruding outward is formed at the tip of the coil end outer diameter side portion 31ba, the received coolant is unlikely to flow out to the tip end side of the coil end outer diameter side portion 31ba. The coolant can be retained on the portion 31b. For this reason, a large amount of coolant can enter the first through hole 36, the second through hole 38, and the inner circumferential groove 39.

隣合う絶縁ボビン３１の外径側鍔部３１ｂ同士が互いに隙間無く接する状態で配置されているため、最上位の絶縁ボビン３１の第１の貫通孔３６、第２の貫通孔３８、および内周溝３９に浸入しなかった冷却液は、図２に矢印Ａ１で示すように、外径側鍔部３１ｂに外径面に沿って下位側の絶縁ボビン３１へと流れる。そして、下位側の絶縁ボビン３１の第１の貫通孔３６、第２の貫通孔３８、および内周溝３９に浸入する。上半部のいずれの絶縁ボビン３１の第１の貫通孔３６、第２の貫通孔３８、および内周溝３９にも浸入しなかった冷却液は、上下中間位の絶縁ボビン３１Ｍの外径側鍔部３１ｂから落下する。   Since the outer diameter side flanges 31b of the adjacent insulating bobbins 31 are arranged in contact with each other without a gap, the first through hole 36, the second through hole 38, and the inner circumference of the uppermost insulating bobbin 31 are arranged. The coolant that has not entered the groove 39 flows to the lower insulating bobbin 31 along the outer diameter surface of the outer diameter side flange 31b, as indicated by an arrow A1 in FIG. Then, it enters the first through hole 36, the second through hole 38, and the inner circumferential groove 39 of the lower insulating bobbin 31. The coolant that has not entered the first through hole 36, the second through hole 38, and the inner peripheral groove 39 of any of the insulating bobbins 31 in the upper half is on the outer diameter side of the upper and lower intermediate insulating bobbins 31M. It falls from the collar part 31b.

第１の貫通孔３６に浸入した冷却液は、図３に矢印Ａ２で示すように、外周溝３７を通ってコイルエンド３０ａの内周に沿って流れる。この間に、コイルエンド３０ａが熱の籠り易い内周側から冷却される。また、外周溝３７を流れる間に一部の冷却液は導線３２間の隙間に浸透して、コイルエンド３０ａを内部からも冷却する。   The coolant that has entered the first through hole 36 flows along the inner periphery of the coil end 30a through the outer peripheral groove 37 as indicated by an arrow A2 in FIG. During this time, the coil end 30a is cooled from the inner peripheral side where heat is easily generated. Further, while flowing through the outer peripheral groove 37, a part of the cooling liquid penetrates into the gap between the conducting wires 32, and cools the coil end 30a also from the inside.

第２の貫通孔３８に浸入した冷却液は、図４に矢印Ａ３で示すように、コイルエンド３０ａの上部側から導線３２間の隙間に浸透する。これにより、コイルエンド３０ａの全体に冷却液が良く行き渡り、コイルエンド３０ａをより一層効率良く冷却することができる。   The coolant that has entered the second through-hole 38 penetrates into the gap between the conductors 32 from the upper side of the coil end 30a as indicated by an arrow A3 in FIG. As a result, the coolant spreads well over the entire coil end 30a, and the coil end 30a can be cooled more efficiently.

第１の貫通孔３６および第２の貫通孔３８に浸入した冷却液は、外周溝３７またはコイルエンド３０ａを通過し、最終的に内径側鍔部３１ｃで受けられる。隣合う絶縁ボビン３１の内径側鍔部３１ｃ同士が互いに隙間無く接する状態で配置されているため、図２に矢印Ａ４で示すように、内径側鍔部３１ｃを伝って上位側の個別コイル３０から下位側の個別コイル３０へと冷却液が順に流れる。   The coolant that has entered the first through hole 36 and the second through hole 38 passes through the outer circumferential groove 37 or the coil end 30a and is finally received by the inner diameter side flange 31c. Since the inner diameter side flanges 31c of the adjacent insulating bobbins 31 are arranged in contact with each other without a gap, as shown by the arrow A4 in FIG. The coolant flows in sequence to the individual coil 30 on the lower side.

上下中間位の絶縁ボビン３１Ｍの内径側鍔部３１ｃに達した冷却液は、矢印Ａ４ａで示すように、下半部の個別コイル３０のコイルエンド３０ａを通過しながら下方へ流れる。その後、矢印Ａ４ｂで示すように、外径側鍔部３１ｂの内径面に沿って最下位の個別コイル３０の絶縁ボビン３１まで流れ、この最下位の絶縁ボビン３１から落下、またはハウジング４の下部に溜まった冷却液に合流する。このように、冷却液が上位側から下位側へと伝っていくことで、下部に位置する個別コイル３０のコイルエンド３０ａも効率良く冷却することができる。   The coolant that has reached the inner diameter side flange 31c of the upper and lower middle insulating bobbin 31M flows downward while passing through the coil end 30a of the individual coil 30 in the lower half, as indicated by an arrow A4a. Thereafter, as indicated by an arrow A4b, it flows to the insulating bobbin 31 of the lowest individual coil 30 along the inner diameter surface of the outer diameter side flange 31b and falls from the lowest insulating bobbin 31 or to the lower part of the housing 4 Join the accumulated coolant. Thus, the cooling liquid is transmitted from the upper side to the lower side, so that the coil ends 30a of the individual coils 30 located in the lower part can be efficiently cooled.

図４に矢印Ａ５で示すように、内周溝３９に浸入した冷却液は、ステータコア２０の歯部２０ｂと導線巻回部３０ａとの間を流れる。これにより、ステータコア２０の歯部２０ｂを効率良く冷却することができる。上部の個別コイル３０の隣合う個別コイル３０の外径側鍔部３１ｂ同士が互いに隙間無く接する状態で配置されているため、最上位の個別ボビン３０の外径側鍔部３１ｂに受けられた冷却液が、各個別コイル３０の外径側鍔部３１ｂｃを伝って下位側の個別コイル３０へと順に流れる。そして、下位側の個別コイル３０の内周溝３９に浸入する。このため、下位に位置する歯部２０ｂも効率良く冷却することができる。   As indicated by an arrow A5 in FIG. 4, the coolant that has entered the inner circumferential groove 39 flows between the tooth portion 20b of the stator core 20 and the conductor winding portion 30a. Thereby, the tooth | gear part 20b of the stator core 20 can be cooled efficiently. Since the outer diameter side flanges 31b of the adjacent individual coils 30 of the upper individual coil 30 are arranged in contact with each other without a gap, the cooling received by the outer diameter side flange 31b of the uppermost individual bobbin 30 The liquid flows along the outer diameter side flange 31bc of each individual coil 30 in order to the individual coil 30 on the lower side. Then, it enters the inner peripheral groove 39 of the individual coil 30 on the lower side. For this reason, the tooth | gear part 20b located in the low order can also be cooled efficiently.

ステータコイル２１およびステータコア２０の冷却に供された冷却液は、ハウジング４の底部に集められ、排出口５５からハウジング４の外部に排出される。排出口５５の上端位置がロータ２の下端位置よりも下位にあり、ハウジング４の底部に溜まった冷却液にロータ２の下端に浸ることがない。このため、高速で回転するロータ２が冷却液を掻き上げて撹拌することがない。なお、ステータ３の下部は、ハウジング４の底部に溜まった冷却液に浸っている。排出口５５から排出された冷却液は、油溜りを経由して冷却液供給装置に戻され、再度、回転電動機内部の冷却に用いられる。   The coolant used for cooling the stator coil 21 and the stator core 20 is collected at the bottom of the housing 4 and discharged from the discharge port 55 to the outside of the housing 4. The upper end position of the discharge port 55 is lower than the lower end position of the rotor 2, and the lower end of the rotor 2 is not immersed in the coolant accumulated at the bottom of the housing 4. For this reason, the rotor 2 rotating at high speed does not scoop up the coolant and stir. Note that the lower portion of the stator 3 is immersed in the coolant accumulated at the bottom of the housing 4. The coolant discharged from the discharge port 55 is returned to the coolant supply device via the oil sump, and is used again for cooling the rotary motor.

このように、この発明の絶縁ボビン３１を用いることにより、ハウジング４の上部から供給される冷却液によってステータコイル２１およびステータコア２２を効率良く冷却することができる。その結果、回転電動機の出力を向上させることができる。   Thus, by using the insulating bobbin 31 of the present invention, the stator coil 21 and the stator core 22 can be efficiently cooled by the coolant supplied from the upper part of the housing 4. As a result, the output of the rotary motor can be improved.

図１２は異なる絶縁ボビンの片方のボビン分割体の斜視図、図１３は同ボビン分割体を他の方向から見た斜視図である。この絶縁ボビンのボビン分割体３１Ａ（３１Ｂ）は、外径側鍔部３１ｂの内径面および内径側鍔部３１ｃの外径面に、冷却液を一時的に留める凹部６１，６２がそれぞれ複数形成されている。外径側鍔部３１ｂの内径面に形成された第１の凹部６１（図１３）、および内径側鍔部３１ｃの外径面に形成された第２の凹部６２（図１２）は共に、各個別ボビン３０の並び方向に延びる溝状である。図の例の場合、第１の凹部６１の数は２本である。１本の第１の凹部６１は第１の貫通孔３６と第２の貫通孔３８の間に位置し、もう１本の第１の凹部６１は第２の貫通孔３８のモータ軸方向外側に位置する。また、第２の凹部６２の数も２本である。   FIG. 12 is a perspective view of one bobbin divided body of different insulating bobbins, and FIG. 13 is a perspective view of the bobbin divided body viewed from another direction. In the bobbin divided body 31A (31B) of this insulating bobbin, a plurality of recesses 61 and 62 for temporarily holding the cooling liquid are formed on the inner diameter surface of the outer diameter side flange 31b and the outer diameter surface of the inner diameter side flange 31c. ing. Both the first recess 61 (FIG. 13) formed on the inner diameter surface of the outer diameter side flange 31b and the second recess 62 (FIG. 12) formed on the outer diameter surface of the inner diameter side flange 31c are A groove shape extending in the direction in which the individual bobbins 30 are arranged. In the example shown in the figure, the number of the first recesses 61 is two. One first recess 61 is located between the first through hole 36 and the second through hole 38, and the other first recess 61 is located outside the second through hole 38 in the motor axial direction. To position. The number of the second recesses 62 is also two.

このように外径側鍔部３１ｂの内径面および内径側鍔部３１ｃの外径面に凹部６１，６２が形成されていると、凹部６１，６２に冷却液を一時的に留めることで、冷却液がコイルエンド（図示せず）と接触する時間を長くして、冷却効果を向上させることができる。また、凹部６１，６２が上記溝状であると、上位側の個別コイル３０から下位側の個別コイル３０への冷却液の流れが円滑となる。   When the recesses 61 and 62 are formed on the inner diameter surface of the outer diameter side flange 31b and the outer diameter surface of the inner diameter side flange 31c as described above, the cooling liquid is temporarily retained in the recesses 61 and 62, thereby cooling the The time during which the liquid contacts the coil end (not shown) can be increased to improve the cooling effect. In addition, when the recesses 61 and 62 have the groove shape, the flow of the coolant from the upper individual coil 30 to the lower individual coil 30 becomes smooth.

第１の凹部６１および第２の凹部６２の両方を設けずに、いずれか一方の凹部のみを設けても良い。その場合でも、凹部６１，６２を設けない場合と比べて、冷却効果を向上させることができる。   Instead of providing both the first recess 61 and the second recess 62, only one of the recesses may be provided. Even in that case, the cooling effect can be improved as compared with the case where the recesses 61 and 62 are not provided.

図１４は回転電動機の他の実施形態を示す。この実施形態の回転電動機は、冷却液供給手段５０が図１に示す回転電動機のものと異なり、ステータコア２０の最上部に位置するステータ固定ボルト挿入用の切欠き２２を冷却液の流路として利用している。すなわち、メインハウジング４ａに流路５２および滴下口５３，５４（図１）が設けられておらず、供給口５１をステータ固定ボルト挿入用の切欠き２２のモータ軸方向の中間部に連通させてある。供給口５１に供給された冷却液は、ステータ固定ボルト挿入用の切欠き２２を通ってモータ軸方向の両側に流れ、絶縁ボビン３１の外径側鍔部３１ｂに滴下される。その後の冷却液の流れは図１に示す回転電動機と同じである。   FIG. 14 shows another embodiment of the rotary motor. In the rotary motor of this embodiment, the coolant supply means 50 is different from that of the rotary motor shown in FIG. 1, and the notch 22 for inserting the stator fixing bolt located at the top of the stator core 20 is used as the coolant flow path. doing. That is, the flow path 52 and the dripping ports 53 and 54 (FIG. 1) are not provided in the main housing 4a, and the supply port 51 is communicated with the intermediate portion in the motor axial direction of the notch 22 for inserting the stator fixing bolt. is there. The coolant supplied to the supply port 51 flows to both sides in the motor axial direction through the notches 22 for inserting the stator fixing bolts, and is dropped on the outer diameter side flange 31b of the insulating bobbin 31. The subsequent flow of the coolant is the same as that of the rotary motor shown in FIG.

このようにステータ固定ボルト挿入用の切欠き２２を冷却液の流路として利用することにより、図１に示す回転電動機のようにメインハウジング４ａに流路５２および滴下口５３，５４を設けずに済み、メインハウジング４ａの加工が容易となる。これ以外は、図１に示す回転電動機と同じ構成であり、同じ構成の箇所については同一符号を付して表わし説明を省略する。   In this way, by using the notch 22 for inserting the stator fixing bolt as the coolant flow path, the flow path 52 and the dripping ports 53 and 54 are not provided in the main housing 4a as in the rotary motor shown in FIG. The main housing 4a can be easily processed. Other than this, the configuration is the same as that of the rotary electric motor shown in FIG. 1, and portions having the same configuration are denoted by the same reference numerals and description thereof is omitted.

以上、実施形態に基づいてこの発明を実施するための形態を説明したが、今回開示された実施の形態はすべての点で例示であって制限的なものではない。この発明の範囲は上記した説明ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。   As mentioned above, although the form for implementing this invention based on embodiment was demonstrated, embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

２０…ステータコア
２０ｂ…歯部
３１…絶縁ボビン
３１ａ…導線巻回部
３１ｂ…外径側鍔部
３１ｂａ…コイルエンド外径側部位
３１ｃ…内径側鍔部
３１ｃａ…コイルエンド内径側部位
３２…導線
３３…歯部挿入孔
３５…突条
３６…第１の貫通孔
３７…外周溝
３８…第２の貫通孔
３９…内周溝 20 ... Stator core 20b ... Tooth part 31 ... Insulating bobbin 31a ... Conductor winding part 31b ... Outer diameter side collar part 31ba ... Coil end outer diameter side part 31c ... Inner diameter side collar part 31ca ... Coil end inner diameter side part 32 ... Conductor 33 ... Tooth portion insertion hole 35 ... ridge 36 ... first through hole 37 ... outer peripheral groove 38 ... second through hole 39 ... inner peripheral groove

Claims (6)

回転電動機における環状のステータコアの内周部に並ぶ複数の歯部とこの歯部の外周に巻回状態で配置される導線とを絶縁する絶縁ボビンであって、
前記歯部が挿入される歯部挿入孔が形成され外周面に前記導線が積層状に巻かれる筒状の導線巻回部と、この導線巻回部における前記ステータコアの径方向の外径端および内径端からそれぞれ前記導線の積層方向に沿って突出する外径側鍔部および内径側鍔部とを有し、前記導線巻回部における前記ステータコアの軸方向を向く外周面部分に前記ステータコアの径方向に延びる外周溝が形成され、かつ前記外径側鍔部に前記ステータコアの径方向に貫通し前記外周溝に連通する第１の貫通孔が形成されていることを特徴とする回転電動機の絶縁ボビン。 An insulating bobbin that insulates a plurality of teeth arranged in the inner peripheral portion of the annular stator core in the rotary electric motor and a conductive wire arranged in a wound state on the outer periphery of the tooth portion,
A cylindrical lead wire winding part in which a tooth part insertion hole into which the tooth part is inserted is formed and the conductive wire is wound in a laminated form on the outer peripheral surface, a radial outer diameter end of the stator core in the conductive wire winding part, and An outer diameter side flange and an inner diameter side flange projecting from the inner diameter end along the direction in which the conductors are laminated, and the diameter of the stator core on the outer peripheral surface portion facing the axial direction of the stator core in the conductor winding portion An outer peripheral groove extending in the direction is formed, and a first through hole penetrating in the radial direction of the stator core and communicating with the outer peripheral groove is formed in the outer diameter side flange portion. Bobbin. 請求項１に記載の回転電動機の絶縁ボビンにおいて、前記外径側鍔部における前記導線巻回部から前記ステータコアの軸方向に延びるコイルエンド外径側部位に、前記ステータコアの径方向に貫通する第２の貫通孔が形成されている回転電動機の絶縁ボビン。   2. The insulated bobbin of the rotary motor according to claim 1, wherein the outer end side portion of the outer diameter side extends through the coil end outer diameter side portion extending in the axial direction of the stator core from the conductor winding portion in the radial direction of the stator core. An insulating bobbin for a rotary motor in which two through holes are formed. 請求項２に記載の回転電動機の絶縁ボビンにおいて、前記第１の貫通孔および前記第２の貫通孔は、前記ステータコアの軸心に対する円周方向の位置が互いにずれて配置されている回転電動機の絶縁ボビン。   The insulating bobbin of the rotary motor according to claim 2, wherein the first through hole and the second through hole are arranged such that positions in a circumferential direction with respect to an axis of the stator core are shifted from each other. Insulated bobbin. 請求項１ないし請求項３のいずれか１項に記載の回転電動機の絶縁ボビンにおいて、前記導線巻回部における前記ステータコアの軸方向を向く面に対向する内周面部分に前記ステータコアの径方向に延びる内周溝が形成されている回転電動機の絶縁ボビン。   The insulation bobbin of the rotary electric motor according to any one of claims 1 to 3, wherein an inner peripheral surface portion of the conductive wire winding portion facing a surface facing the axial direction of the stator core is arranged in a radial direction of the stator core. An insulating bobbin for a rotary motor in which an extending inner peripheral groove is formed. 請求項４に記載の回転電動機の絶縁ボビンにおいて、前記内周溝および前記外周溝は、前記ステータコアの軸心に対する円周方向の位置が互いにずれて配置されている回転電動機の絶縁ボビン。   5. The insulated bobbin for a rotary motor according to claim 4, wherein the inner circumferential groove and the outer circumferential groove are arranged with their circumferential positions shifted from each other with respect to the axis of the stator core. 請求項１ないし請求項５のいずれか１項に記載の回転電動機の絶縁ボビンにおいて、前記外径側鍔部における前記コイルエンド外径側部位の先端に前記ステータコアの径方向の外径側に突出する突条が形成されている回転電動機の絶縁ボビン。   The insulating bobbin for a rotary electric motor according to any one of claims 1 to 5, wherein the outer end of the outer end of the outer diameter side projects from the outer end of the coil end to the outer end of the stator core in the radial direction. Insulating bobbin for a rotating motor on which a protruding ridge is formed.
JP2016035447A 2016-02-26 2016-02-26 Insulation bobbin for rotary electric machine Pending JP2017153309A (en)

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JP2016035447A JP2017153309A (en) 2016-02-26 2016-02-26 Insulation bobbin for rotary electric machine
PCT/JP2017/006673 WO2017146117A1 (en) 2016-02-26 2017-02-22 Insulation bobbin of rotating electric machine

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53155003U (en) * 1977-05-10 1978-12-06
JPH0417539A (en) * 1990-05-08 1992-01-22 Nippondenso Co Ltd Stator of rotary electric machine
JP2008054391A (en) * 2006-08-23 2008-03-06 Makita Corp Cooling structure of dc brushless motor
JP2010239775A (en) * 2009-03-31 2010-10-21 Mitsubishi Heavy Ind Ltd Rotary electric machine
JP2013013192A (en) * 2011-06-28 2013-01-17 Nissan Motor Co Ltd Stator and insulator
JP2014107874A (en) * 2012-11-22 2014-06-09 Toyota Motor Corp Rotary electric machine
JP2015012792A (en) * 2013-07-02 2015-01-19 トヨタ自動車株式会社 Stator for rotary electric machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53155003U (en) * 1977-05-10 1978-12-06
JPH0417539A (en) * 1990-05-08 1992-01-22 Nippondenso Co Ltd Stator of rotary electric machine
JP2008054391A (en) * 2006-08-23 2008-03-06 Makita Corp Cooling structure of dc brushless motor
JP2010239775A (en) * 2009-03-31 2010-10-21 Mitsubishi Heavy Ind Ltd Rotary electric machine
JP2013013192A (en) * 2011-06-28 2013-01-17 Nissan Motor Co Ltd Stator and insulator
JP2014107874A (en) * 2012-11-22 2014-06-09 Toyota Motor Corp Rotary electric machine
JP2015012792A (en) * 2013-07-02 2015-01-19 トヨタ自動車株式会社 Stator for rotary electric machine

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