JP2017079536A - Stator - Google Patents

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JP2017079536A
JP2017079536A JP2015206469A JP2015206469A JP2017079536A JP 2017079536 A JP2017079536 A JP 2017079536A JP 2015206469 A JP2015206469 A JP 2015206469A JP 2015206469 A JP2015206469 A JP 2015206469A JP 2017079536 A JP2017079536 A JP 2017079536A
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cavity
coil
tooth
yoke
varnish
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松本 隆志
Takashi Matsumoto
隆志 松本
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Toyota Motor Corp
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Toyota Motor Corp
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Abstract

PROBLEM TO BE SOLVED: To increase an adhesive force of a coil and an insulative member by a simple and convenient structure.SOLUTION: A stator comprises: a yoke 12; a tooth 13; an insulative member 20 including a circumferential direction wall part 28 covering at least part of an end face of the tooth 13 in a circumferential direction thereof, and a flange 23 having at least a plate wall part 22 extending outwardly from an end face of the tooth 13 in an axial direction thereof on the side of an inner peripheral face of the yoke 12; a coil 15 wound around the circumferential direction wall part 28; and an annular member 31 attached on a leading end side of the tooth 13, and closing an opening of a cavity 40 between an axial direction end face of the tooth 13 and an inner face of the coil 15, the opening being located on the leading end side of the tooth 13. The plate wall part 22 closes an opening of the cavity 40 on the side of the yoke 12, and has an injection hole 25 for injecting an adhesive material 60 into the cavity 40. The annular member 31 has: an outer peripheral face 31a; and depressurization grooves 32, 33 serving to communicate the cavity 40 to ambient air in the outer peripheral face. The stator further comprises a varnish 60 filled in the cavity 40 from the injection hole 25.SELECTED DRAWING: Figure 7

Description

本発明は、ステータの構造に関する。   The present invention relates to a structure of a stator.

電動機や発電機のロータは、積層形成されたロータコアのティースにボビンの作用をする絶縁部材を介して巻線を巻回し、この巻線の外周に樹脂からなる封止剤を塗布したり、樹脂を巻線の外周にポッティングしたりすることによって巻線の形状を固定した構造のものが用いられている(例えば、特許文献1参照)。   The rotor of an electric motor or a generator is formed by winding a winding around a laminated rotor core tooth through an insulating member that acts as a bobbin, and applying a sealing agent made of resin on the outer periphery of the winding, The structure of which the shape of the coil | winding was fixed by potting the outer periphery of a coil | winding is used (for example, refer patent document 1).

また、電動機や発電機のステータは、鋼板を積層し、円筒形のヨークとヨークから半径方向内側に向って突出する複数のティースを含むステータコアを形成し、ティースにコイル線材を巻回してコイルを形成したものが用いられている。ティースに巻回されたコイル線材の一部は、ステータコアの軸方向の両端面から軸方向外側に突出したコイルエンドを形成する。このようなステータにおいて、コイルエンドの外面からワニスを滴下してコイル線材の間に含浸させてコイル線材間或いはコイル全体の形状を固定すると共に絶縁性を向上させる方法が提案されている(例えば、特許文献2,3参照)。   In addition, a stator of an electric motor or a generator is formed by stacking steel sheets, forming a stator core including a cylindrical yoke and a plurality of teeth protruding radially inward from the yoke, and winding a coil wire around the teeth to form a coil. What was formed is used. Part of the coil wire wound around the teeth forms a coil end protruding outward in the axial direction from both axial end surfaces of the stator core. In such a stator, a method has been proposed in which varnish is dropped from the outer surface of the coil end and impregnated between the coil wires to fix the shape between the coil wires or the entire coil and improve the insulation (for example, (See Patent Documents 2 and 3).

また、ステータにおいて樹脂を注入する金型でコイルエンドを覆い、コイルエンドを樹脂モールドし、コイルとステータコアの固定と絶縁性の向上を図る方法が提案されている(例えば、特許文献4)。   Further, a method has been proposed in which a coil end is covered with a mold for injecting resin in the stator, the coil end is resin-molded, and the coil and the stator core are fixed and the insulation is improved (for example, Patent Document 4).

特開2002−51486号公報JP 2002-51486 A 特開2015−155369号公報JP2015-155369A 特開2005−318692号公報JP 2005-318692 A 特開2009−50048号公報JP 2009-50048 A

ところで、特許文献1に記載された従来技術のように、樹脂部材の外部にコイル線材を巻回してティースにコイルを構成する場合、四角い断面形状のティースの外面に取り付ける絶縁部材はティースの外面との密着性が良くなるように、ティースの外形形状に沿った四角筒断面のものが使用される。一方、四角筒断面の絶縁部材の外周に巻回されたコイルの断面はコイル線材の最小曲げ半径のため軸方向に長い長円形形状となる。このため、絶縁部材の軸方向外面とコイルエンドの内面との間に空間ができる。特許文献2,3に記載された従来技術のようにコイルエンドの外面からワニスを滴下、含浸させても、この内部空間にワニスを十分に充填できず、コイルエンドと絶縁部材との固定が不十分となることがあった。また、特許文献4に記載されているように、樹脂を注入する金型でコイルエンドを覆ってコイルエンド内部および上記の空間に樹脂を注入する方法は、金型と高圧の樹脂注入装置を準備することが必要となることから、製造工程が複雑になってしまい製造に時間が掛かってしまうという問題があった。   By the way, like the prior art described in Patent Document 1, when a coil is formed on a tooth by winding a coil wire around the resin member, the insulating member attached to the outer surface of the tooth having a square cross-sectional shape is the outer surface of the tooth. In order to improve the adhesion, a rectangular tube cross-section along the outer shape of the teeth is used. On the other hand, the cross section of the coil wound around the outer periphery of the insulating member having the square tube cross section has an oval shape that is long in the axial direction because of the minimum bending radius of the coil wire. For this reason, a space is formed between the outer surface in the axial direction of the insulating member and the inner surface of the coil end. Even if the varnish is dropped and impregnated from the outer surface of the coil end as in the prior art described in Patent Documents 2 and 3, the internal space cannot be sufficiently filled with the varnish, and the coil end and the insulating member are not fixed. Sometimes it was enough. Further, as described in Patent Document 4, a method of injecting resin into the coil end and the above space by covering the coil end with a mold for injecting resin is prepared with a mold and a high-pressure resin injection device. Therefore, there is a problem that the manufacturing process becomes complicated and the manufacturing takes time.

そこで、本発明は、簡便な構成で、コイルと絶縁部材との接着力を向上させることを目的とする。   Then, this invention aims at improving the adhesive force of a coil and an insulating member with a simple structure.

本発明のステータは、周方向に延びるヨークと、前記ヨークの内周面から半径方向に突出するティースと、前記ティースの周方向端面の少なくとも一部を覆う周方向壁部と、前記ヨークの内周面側において少なくとも前記ティースの軸方向端面より外側に延出する板壁部を有するフランジと、を含む絶縁部材と、前記周方向壁部の外側に巻回されたコイルと、前記ティースの先端側に取り付けられ、前記ティースの軸方向端面と前記コイルの内面との間の空洞の前記ティースの先端側の開口を塞ぐ円環部材と、を備え、前記板壁部は、前記空洞の前記ヨークの側の開口を塞いでおり、前記空洞に接着体を注入する注入穴を備え、前記円環部材は、外周面に前記空洞と外気とを連通する圧抜き溝を備え、前記注入穴から前記空洞に充填されている接着体を有していること、を特徴とする。   The stator of the present invention includes a yoke extending in the circumferential direction, teeth projecting radially from the inner circumferential surface of the yoke, a circumferential wall portion covering at least a part of the circumferential end surface of the teeth, A flange having a plate wall portion extending outward from at least the axial end surface of the tooth on the circumferential surface side, a coil wound around the outer side of the circumferential wall portion, and a distal end side of the tooth An annular member that closes the opening on the distal end side of the tooth between the axial end surface of the tooth and the inner surface of the coil, and the plate wall portion is on the yoke side of the cavity. The annular member has an injection hole for injecting the adhesive into the cavity, and the annular member has a pressure release groove on the outer peripheral surface for communicating the cavity and the outside air. Filled To have the adhesive body, characterized by.

本発明は、簡便な構成で、コイルと絶縁部材との接着力を向上させることができる。   The present invention can improve the adhesive force between a coil and an insulating member with a simple configuration.

本発明の実施形態におけるステータを有するモータの平断面図である。It is a plane sectional view of a motor which has a stator in an embodiment of the present invention. 本発明の実施形態におけるステータの部分斜視図である。It is a fragmentary perspective view of the stator in the embodiment of the present invention. 本発明の実施形態におけるステータの内周側から見たティースと絶縁部材と円環部材とヨークとコイルとを示す周方向展開図である。FIG. 3 is a circumferential development view showing a tooth, an insulating member, an annular member, a yoke, and a coil viewed from the inner peripheral side of the stator in the embodiment of the present invention. 本発明の実施形態におけるステータの絶縁部材の軸方向外面とコイル内面との間の空洞の構成を示す平断面図である(図3のA−A断面)。It is a plane sectional view showing the composition of the cavity between the axial direction outer surface of the insulating member of the stator in the embodiment of the present invention, and the coil inner surface (AA section of Drawing 3). 本発明の他の実施形態におけるステータの内周側から見たティースと絶縁部材と円環部材とヨークとコイルとを示す周方向展開図である。It is the circumferential direction expanded view which shows the tooth | gear, the insulating member, the annular member, the yoke, and the coil which were seen from the inner peripheral side of the stator in other embodiment of this invention. 本発明の他の実施形態におけるステータの絶縁部材の軸方向外面とコイル内面との間の空洞の構成を示す平断面図である(図5のB−B断面)。It is a plane sectional view showing the composition of the cavity between the axial direction outer surface of the insulating member of the stator and the coil inner surface in other embodiments of the present invention (BB section of Drawing 5). 本発明の変形例におけるステータの部分斜視図である。It is a fragmentary perspective view of the stator in the modification of this invention. 本発明の変形例におけるステータの内周側から見たティースと絶縁部材の断面と円環部材とヨークとコイルとを示す周方向展開図である。It is the circumferential direction expanded view which shows the cross section of the teeth, the insulating member, the annular member, the yoke, and the coil which were seen from the inner peripheral side of the stator in the modification of this invention.

以下、図面を参照しながら本発明の実施形態について説明する。まず、図1を参照しながら、本発明の実施形態のステータ11を有するモータ100について簡単に説明する。図1に示すようにモータ100は、円筒形のケーシング10と、ケーシング10の内面に取り付けられたステータ11と、ステータ11の内部で回転中心17の周りに回転軸19と共に回転するロータ18とを備えている。ステータ11は、円環状のヨーク12と、ヨーク12の内周面12bから回転中心17の方向に向かって半径方向に突出する複数のティース13と、各ティース13の間に形成された複数のスロット16とを備えるステータコア14と、ティース13の外面とヨーク12の内周面12bとを覆う絶縁部材20と、各スロット16を通して各ティース13の外面を覆っている絶縁部材20の周囲に巻回された複数の集中巻きのコイル15とを備えている。ここで、ステータコア14は電磁鋼板を積層して構成したものである。また、コイル15のティース13の先端側の面には、円環部材31が配置されている。ロータ18は、外周面18aに永久磁石が取り付けられており、電力がステータ11のコイル15に供給されるとコイル15には磁力が発生し、この磁力と永久磁石の磁力によってロータ18が回転し、回転出力が回転軸19から外部に取り出される。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, a motor 100 having a stator 11 according to an embodiment of the present invention will be briefly described with reference to FIG. As shown in FIG. 1, the motor 100 includes a cylindrical casing 10, a stator 11 attached to the inner surface of the casing 10, and a rotor 18 that rotates with a rotary shaft 19 around a rotation center 17 inside the stator 11. I have. The stator 11 includes an annular yoke 12, a plurality of teeth 13 protruding radially from the inner peripheral surface 12 b of the yoke 12 toward the rotation center 17, and a plurality of slots formed between the teeth 13. 16 is wound around the insulating member 20 that covers the outer surface of each tooth 13 through each slot 16 and the insulating member 20 that covers the outer surface of the tooth 13 and the inner peripheral surface 12b of the yoke 12. A plurality of concentrated winding coils 15. Here, the stator core 14 is configured by laminating electromagnetic steel plates. In addition, an annular member 31 is disposed on the tip side surface of the tooth 13 of the coil 15. The rotor 18 has a permanent magnet attached to the outer peripheral surface 18a. When electric power is supplied to the coil 15 of the stator 11, a magnetic force is generated in the coil 15, and the rotor 18 is rotated by this magnetic force and the magnetic force of the permanent magnet. The rotation output is taken out from the rotation shaft 19 to the outside.

図2に示すように、周方向に延びるヨーク12から突出したティース13は、四角い矩形断面となるように電磁鋼板を積層したもので、ティース13の外面には樹脂製の絶縁部材20が取り付けられている。絶縁部材20は、ティース13の軸方向端面13aとティース13の周方向端面13bとを覆う筒状部21と、筒状部21のヨーク12の側の開口縁から外方に延びる板状のフランジ23とを備えている。筒状部21の周方向壁部28と軸方向外面21aの外側にはコイル15が巻回されている。図2,3に示すように、コイル15の筒状部21の周方向壁部28に沿ってスロット16に挿通されている部分は周方向壁部28に沿った直線形状で、コイル15の内面は周方向壁部28に接している。一方、コイル15の筒状部21の軸方向外面21aよりも軸方向外側に突出したコイルエンド15aは、軸方向外面21aから離れた弓状となる。そして、コイルエンド15aの内面と軸方向外面21aとの間には図2,3に示すようにティース13の延びる方向に沿って半径方向に延びる略半楕円断面の空洞40が形成されている。空洞40は、ティース13の先端側とヨーク12の側にそれぞれ開口を有している。コイル15のヨーク12側の側面は、絶縁部材20のフランジ23の表面に接しているので、空洞40のヨーク12側の開口はフランジ23のヨーク12の軸方向外側に延出している板壁部22によって塞がれている。   As shown in FIG. 2, the teeth 13 protruding from the yoke 12 extending in the circumferential direction are formed by laminating electromagnetic steel plates so as to have a square rectangular cross section, and an insulating member 20 made of resin is attached to the outer surface of the teeth 13. ing. The insulating member 20 includes a cylindrical portion 21 that covers the axial end surface 13a of the tooth 13 and the circumferential end surface 13b of the tooth 13, and a plate-like flange that extends outward from the opening edge of the cylindrical portion 21 on the yoke 12 side. 23. A coil 15 is wound around the circumferential wall portion 28 of the cylindrical portion 21 and the outer side of the axial outer surface 21a. As shown in FIGS. 2 and 3, the portion inserted into the slot 16 along the circumferential wall portion 28 of the cylindrical portion 21 of the coil 15 has a linear shape along the circumferential wall portion 28, and the inner surface of the coil 15. Is in contact with the circumferential wall 28. On the other hand, the coil end 15a protruding outward in the axial direction from the axial outer surface 21a of the cylindrical portion 21 of the coil 15 has an arcuate shape away from the axial outer surface 21a. A cavity 40 having a substantially semi-elliptical cross section extending in the radial direction along the extending direction of the teeth 13 is formed between the inner surface of the coil end 15a and the axially outer surface 21a as shown in FIGS. The cavity 40 has openings on the distal end side of the tooth 13 and the yoke 12 side, respectively. Since the side surface of the coil 15 on the yoke 12 side is in contact with the surface of the flange 23 of the insulating member 20, the opening on the yoke 12 side of the cavity 40 extends to the outer side in the axial direction of the yoke 12 of the flange 23. It is blocked by.

図2,4に示すように、円環部材31は、円環状の帯板であり、幅方向の端面が筒状部21のティース13の先端側の軸方向外面21aに取り付けられ、外周面31aはコイル15のティース13の先端側の面に接している。これにより、円環部材31は、空洞40のティース13先端側の開口を塞いでいる。なお、円環部材31は、内周面31bがティース13の先端よりロータ18側に突出しないように、筒状部21の軸方向外面21aに取り付けられているので、円環部材31がロータ18と干渉することはない。   As shown in FIGS. 2 and 4, the annular member 31 is an annular band plate, and the end surface in the width direction is attached to the axial outer surface 21 a on the tip side of the tooth 13 of the cylindrical portion 21, and the outer peripheral surface 31 a. Is in contact with the surface on the tip side of the teeth 13 of the coil 15. As a result, the annular member 31 closes the opening of the cavity 40 on the tip end side of the tooth 13. The annular member 31 is attached to the axially outer surface 21a of the cylindrical portion 21 so that the inner peripheral surface 31b does not protrude from the tip of the tooth 13 toward the rotor 18 side. There will be no interference.

図2,3に示すように、円環部材31の外周面31aの略中央には、周方向に延びる圧抜き溝32が設けられている。また、隣接するコイル15の間には、圧抜き溝32からモータ100の軸方向内側に幅方向の端面まで延びる圧抜き溝33が設けられている。圧抜き溝32,33は、空洞40と外気とを連通する空気流路を形成する。   As shown in FIGS. 2 and 3, a pressure release groove 32 extending in the circumferential direction is provided in the approximate center of the outer peripheral surface 31 a of the annular member 31. Further, a pressure relief groove 33 extending from the pressure relief groove 32 to the inner end in the axial direction of the motor 100 to the end face in the width direction is provided between the adjacent coils 15. The pressure release grooves 32 and 33 form an air flow path that communicates the cavity 40 with the outside air.

次、図4を参照しながら、空洞40の中に接着体であるワニス60を充填する工程について説明する。図4の矢印91に示すようにフランジ23の板壁部22に設けられた注入穴25からワニス60を空洞40の中に注入すると、ワニス60は、空洞40の中を満たしながら空洞40の中に充填されていく。一方、空洞40の中に入っていた空気は、図4の矢印92のように、円環部材31に設けられた圧抜き溝32を通って外部に排出される。このように、ワニス60を注入する注入穴25と半径方向の反対側に配置された圧抜き溝32から空気が外部に排出されていくので、注入穴25から注入されたワニス60は、図4に示すように、板壁部22からティース13の先端側に向って空洞40の中に充填されていく。   Next, the process of filling the varnish 60, which is an adhesive body, into the cavity 40 will be described with reference to FIG. When the varnish 60 is injected into the cavity 40 from the injection hole 25 provided in the plate wall portion 22 of the flange 23 as indicated by an arrow 91 in FIG. 4, the varnish 60 fills the cavity 40 and enters the cavity 40. It will be filled. On the other hand, the air contained in the cavity 40 is discharged to the outside through the pressure release groove 32 provided in the annular member 31 as indicated by an arrow 92 in FIG. In this way, air is discharged to the outside through the pressure release groove 32 arranged on the opposite side in the radial direction from the injection hole 25 for injecting the varnish 60, so that the varnish 60 injected from the injection hole 25 is shown in FIG. As shown in FIG. 3, the cavity 40 is filled from the plate wall portion 22 toward the tip side of the tooth 13.

更に、ワニス60の充填を続けると、ワニス60は空洞40から圧抜き溝32に入り、空気と同様、外部にもれ出てくる。もれ出たワニス60は、図4の矢印92に示すように、隣接するコイル15の間の空間にヨーク12の方に向って半径方向にはみ出したり、図3の矢印90に示すように、圧抜き溝32から圧抜き溝33に流入し、隣接するコイル15の間の空間に軸方向内側に向ってはみ出したりする。このように、ワニス60が空洞40の外部にはみ出して来たら、空洞40の内部にワニス60が完全に充填されたと判断してワニス60の注入を終了する。空洞40に充填されたワニス60は絶縁部材20の外面およびコイル15の内面に密着し、硬化するとコイル15と絶縁部材20とを強固に接着する。   Further, when the filling of the varnish 60 is continued, the varnish 60 enters the pressure release groove 32 from the cavity 40 and comes out to the outside like the air. The leaked varnish 60 protrudes in the radial direction toward the yoke 12 in the space between the adjacent coils 15 as shown by an arrow 92 in FIG. 4, or as shown by an arrow 90 in FIG. It flows into the pressure release groove 33 from the pressure release groove 32 and protrudes toward the inner side in the axial direction in the space between the adjacent coils 15. Thus, when the varnish 60 protrudes outside the cavity 40, it is determined that the interior of the cavity 40 is completely filled with the varnish 60, and the injection of the varnish 60 is terminated. The varnish 60 filled in the cavity 40 is in close contact with the outer surface of the insulating member 20 and the inner surface of the coil 15 and firmly bonds the coil 15 and the insulating member 20 when cured.

以上説明したように、本実施形態のステータ11は、絶縁部材20の外面とコイル15の内面との間の空洞40にワニス60を充填することができるので、コイル15と絶縁部材20とを強固に接着することができる。また、本実施形態のステータ11は、ワニス60を注入する注入穴25と半径方向の反対側に配置された圧抜き溝32から空気が外部に排出されていくので、注入穴25から注入されたワニス60が板壁部22からティース13の先端側に向ってスムーズに空洞40の中に充填されていく。このため、空洞40の中に気泡が残らないようにワニス60を充填でき、ワニス60と絶縁部材20の外面およびコイル15の内面とを密着させることができる。これにより、コイル15と絶縁部材20との接着力を向上させることができる。   As described above, the stator 11 according to the present embodiment can fill the cavity 40 between the outer surface of the insulating member 20 and the inner surface of the coil 15 with the varnish 60, so that the coil 15 and the insulating member 20 are firmly formed. Can be glued to. Further, in the stator 11 of this embodiment, air is discharged from the injection hole 25 for injecting the varnish 60 to the outside through the pressure release groove 32 disposed on the opposite side in the radial direction. The varnish 60 is smoothly filled into the cavity 40 from the plate wall portion 22 toward the distal end side of the tooth 13. For this reason, the varnish 60 can be filled so that air bubbles do not remain in the cavity 40, and the varnish 60 can be brought into close contact with the outer surface of the insulating member 20 and the inner surface of the coil 15. Thereby, the adhesive force of the coil 15 and the insulating member 20 can be improved.

また、本実施形態のステータ11は、圧抜き溝32,33からのワニス60のはみ出しを目視検査することで、空洞40の中にワニス60が充填されていることを確認することができるので検査工程の簡略化が図れる。更に、ワニス60は圧抜き溝32,33を通って隣接するコイル15の間のロータ18と反対側のヨーク12の側、或いは、モータ100の軸方向内側にはみ出してくるので、はみ出したワニス60がロータ18に接触することがない。このため、はみ出したワニス60をトリミングする必要がなく、製造工程を簡略化することができる。   Further, the stator 11 according to the present embodiment can check that the varnish 60 is filled in the cavity 40 by visually inspecting the protrusion of the varnish 60 from the pressure release grooves 32 and 33, so that the inspection is performed. The process can be simplified. Further, the varnish 60 protrudes through the pressure release grooves 32 and 33 to the side of the yoke 12 opposite to the rotor 18 between the adjacent coils 15, or to the inner side in the axial direction of the motor 100. Does not contact the rotor 18. For this reason, it is not necessary to trim the protruding varnish 60, and the manufacturing process can be simplified.

次に図5,6を参照しながら、本発明の他の実施形態について説明する。先に図1から図4を参照して説明した実施形態と同様の部分には同様の符号を付して説明は省略する。本実施形態のステータ11は、円環部材31の空洞40の中央に対応する位置からモータ100の軸方向外側に向って幅方向の端面まで延びる圧抜き溝34を設けたものである。   Next, another embodiment of the present invention will be described with reference to FIGS. Parts similar to those of the embodiment described above with reference to FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof is omitted. The stator 11 of the present embodiment is provided with a pressure relief groove 34 extending from the position corresponding to the center of the cavity 40 of the annular member 31 to the end surface in the width direction toward the outer side in the axial direction of the motor 100.

先に説明した実施形態と同様、図6の矢印91に示すように、注入穴25からワニス60を空洞40の中に注入すると、ワニス60は、空洞40の中を満たしながら空洞40の中に充填されていく。一方、空洞40の中に入っていた空気は、図5の矢印93のように、円環部材31に設けられた圧抜き溝34を通って軸方向外側に向って排出される。   Similar to the embodiment described above, when the varnish 60 is injected into the cavity 40 from the injection hole 25 as shown by the arrow 91 in FIG. 6, the varnish 60 fills the cavity 40 and enters the cavity 40. It will be filled. On the other hand, the air that has entered the cavity 40 is discharged outward in the axial direction through the pressure release groove 34 provided in the annular member 31 as indicated by an arrow 93 in FIG. 5.

更に、ワニス60の充填を続けると、ワニス60は空洞40から圧抜き溝34に入り、空気と同様、円環部材31の軸方向外側の端面から外部にもれ出てくる。もれ出たワニス60は、図5に示すようすに、円環部材31の軸方向外側の端面からコイルエンド15aのロータ18側の面にはみ出してくる。このように、ワニス60が空洞40の外部にはみ出して来たら、空洞40の内部にワニス60が完全に充填されたと判断してワニス60の注入を終了する。空洞40に充填されたワニス60は絶縁部材20の外面およびコイル15の内面に密着し、硬化するとコイル15と絶縁部材20とを強固に接着する。   Further, when the varnish 60 continues to be filled, the varnish 60 enters the pressure release groove 34 from the cavity 40 and escapes to the outside from the end surface on the outer side in the axial direction of the annular member 31 like air. As shown in FIG. 5, the leaked varnish 60 protrudes from the end surface on the outer side in the axial direction of the annular member 31 to the surface on the rotor 18 side of the coil end 15a. Thus, when the varnish 60 protrudes outside the cavity 40, it is determined that the interior of the cavity 40 is completely filled with the varnish 60, and the injection of the varnish 60 is terminated. The varnish 60 filled in the cavity 40 is in close contact with the outer surface of the insulating member 20 and the inner surface of the coil 15 and firmly bonds the coil 15 and the insulating member 20 when cured.

以上説明したように、本実施形態のステータ11は、先に説明した実施形態と同様、ワニス60を注入する注入穴25と半径方向の反対側に配置された圧抜き溝34から空気が外部に排出されていくので、注入穴25から注入されたワニス60が板壁部22からティース13の先端側に向ってスムーズに空洞40の中に充填されていく。このため、空洞40の中に気泡が残らないようにワニス60を充填でき、ワニス60と絶縁部材20の外面およびコイル15の内面とを密着させることができる。これにより、コイル15と絶縁部材20との接着力を向上させることができる。   As described above, in the stator 11 of the present embodiment, air is introduced to the outside from the pressure release groove 34 disposed on the opposite side in the radial direction from the injection hole 25 for injecting the varnish 60, as in the above-described embodiment. As it is discharged, the varnish 60 injected from the injection hole 25 is smoothly filled into the cavity 40 from the plate wall portion 22 toward the distal end side of the tooth 13. For this reason, the varnish 60 can be filled so that air bubbles do not remain in the cavity 40, and the varnish 60 can be brought into close contact with the outer surface of the insulating member 20 and the inner surface of the coil 15. Thereby, the adhesive force of the coil 15 and the insulating member 20 can be improved.

また、本実施形態のステータ11は、圧抜き溝34からのワニス60のはみ出しを目視検査することで、空洞40の中にワニス60が充填されていることを確認することができるので検査工程の簡略化が図れる。更に、ワニス60は圧抜き溝34からコイルエンド15aのロータ18側の面にはみ出してくるので、はみ出したワニス60がロータ18に接触することがない。はみ出したワニス60をトリミングする必要がなく、製造工程を簡略化することができる。   Moreover, since the stator 11 of this embodiment can confirm that the varnish 60 is filled in the cavity 40 by visually inspecting the protrusion of the varnish 60 from the pressure release groove 34, the inspection process can be performed. Simplification can be achieved. Furthermore, since the varnish 60 protrudes from the pressure release groove 34 to the surface of the coil end 15 a on the rotor 18 side, the protruding varnish 60 does not contact the rotor 18. There is no need to trim the protruding varnish 60, and the manufacturing process can be simplified.

<変形例>
図7及び8は、本発明の変形例におけるステータ29の構成を示す部分斜視図及び周方向展開図である。ステータ29において、上記実施の形態と同じ構成については同一の符号を付して説明を省略する。
<Modification>
7 and 8 are a partial perspective view and a circumferential development view showing the configuration of the stator 29 in a modification of the present invention. In the stator 29, the same components as those in the above embodiment are denoted by the same reference numerals, and description thereof is omitted.

本変形例では、絶縁部材20は、ティース13の軸方向端面13aを覆わず、周方向端面13bを覆う周方向壁部28を有する。また、円環部材31は、周方向壁部28のティース13の先端側の端面に取り付けられている。   In this modification, the insulating member 20 has a circumferential wall portion 28 that does not cover the axial end surface 13a of the tooth 13 but covers the circumferential end surface 13b. Further, the annular member 31 is attached to the end face on the tip side of the teeth 13 of the circumferential wall portion 28.

本変形例では、ティース13の軸方向端面13aとコイル15の内面とによって空洞40が形成される。上記実施の形態と同様に、板壁部22には、空洞40に連通する注入穴25が設けられており、円環部材31の外周面31aの略中央には、周方向に延びる圧抜き溝32が設けられている。また、隣接するコイル15の間には、圧抜き溝32からモータ100の軸方向内側に幅方向の端面まで延びる圧抜き溝33が設けられている。   In this modification, a cavity 40 is formed by the axial end surface 13 a of the tooth 13 and the inner surface of the coil 15. As in the above embodiment, the plate wall portion 22 is provided with an injection hole 25 communicating with the cavity 40, and a pressure release groove 32 extending in the circumferential direction is provided at the approximate center of the outer peripheral surface 31 a of the annular member 31. Is provided. Further, a pressure relief groove 33 extending from the pressure relief groove 32 to the inner end in the axial direction of the motor 100 to the end face in the width direction is provided between the adjacent coils 15.

本変形例においても、ワニス60を注入穴25から空洞40に注入すると空洞40の中の空気は圧抜き溝32,33から外部に排出され、ワニス60を空洞40に完全に充填することができる。すなわち、ステータ29では、ティース13の軸方向端面13aとコイル15の内面とで形成される空洞40内にワニス60を充填することができ、ティース13、コイル15及び絶縁部材20の周方向壁部28の端部を強固に接着することができる。また、ワニス60とティース13、コイル15、絶縁部材20の周方向壁部28の端部とを密着させることができる。これにより、ティース13とコイル15との電気的絶縁を維持しつつ、ティース13、コイル15及び絶縁部材20との接着力を向上させることができる。   Also in this modification, when the varnish 60 is injected into the cavity 40 from the injection hole 25, the air in the cavity 40 is discharged to the outside from the pressure release grooves 32 and 33, and the varnish 60 can be completely filled into the cavity 40. . That is, in the stator 29, the varnish 60 can be filled in the cavity 40 formed by the axial end surface 13 a of the tooth 13 and the inner surface of the coil 15, and the circumferential wall portion of the tooth 13, the coil 15, and the insulating member 20. The end portions of 28 can be firmly bonded. Moreover, the varnish 60, the teeth 13, the coil 15, and the end of the circumferential wall 28 of the insulating member 20 can be brought into close contact with each other. Thereby, the adhesive force between the teeth 13, the coil 15, and the insulating member 20 can be improved while maintaining electrical insulation between the teeth 13 and the coils 15.

なお、本変形例では、絶縁部材20がティース13の軸方向端面13aをまったく覆わない構成について説明したが、その一部を覆う構成としてもよい。また、ティース13とコイル15との電気的絶縁性が維持される限りにおいて、絶縁部材20の周方向壁部28がティース13の周方向端面13bを完全に覆わず、少なくともその一部を覆う構成としてもよい。   In the present modification, the configuration in which the insulating member 20 does not cover the end surface 13a in the axial direction of the tooth 13 has been described. Further, as long as the electrical insulation between the tooth 13 and the coil 15 is maintained, the circumferential wall portion 28 of the insulating member 20 does not completely cover the circumferential end surface 13b of the tooth 13 but covers at least a part thereof. It is good.

10 ケーシング、11,29 ステータ、12 ヨーク、12b,31b 内周面、13 ティース、13a 軸方向端面、13b 周方向端面、14 ステータコア、15 コイル、15a コイルエンド、16 スロット、17 回転中心、18 ロータ、18a,31a 外周面、19 回転軸、20 絶縁部材、21 筒状部、21a 軸方向外面、22 板壁部、23 フランジ、25 注入穴、28 周方向壁部、31 円環部材、32,33,34 圧抜き溝、40 空洞、60 ワニス、100 モータ。   10 casing, 11, 29 stator, 12 yoke, 12b, 31b inner peripheral surface, 13 teeth, 13a axial end surface, 13b circumferential end surface, 14 stator core, 15 coil, 15a coil end, 16 slot, 17 center of rotation, 18 rotor , 18a, 31a outer peripheral surface, 19 rotating shaft, 20 insulating member, 21 cylindrical portion, 21a axial outer surface, 22 plate wall portion, 23 flange, 25 injection hole, 28 circumferential wall portion, 31 annular member, 32, 33 , 34 Pressure relief groove, 40 cavity, 60 varnish, 100 motor.

Claims (1)

ステータであって、
周方向に延びるヨークと、
前記ヨークの内周面から半径方向に突出するティースと、
前記ティースの周方向端面の少なくとも一部を覆う周方向壁部と、前記ヨークの内周面側において少なくとも前記ティースの軸方向端面より外側に延出する板壁部を有するフランジと、を含む絶縁部材と、
前記周方向壁部の外側に巻回されたコイルと、
前記ティースの先端側に取り付けられ、前記ティースの軸方向端面と前記コイルの内面との間の空洞の前記ティースの先端側の開口を塞ぐ円環部材と、を備え、
前記板壁部は、前記空洞の前記ヨークの側の開口を塞いでおり、前記空洞に接着体を注入する注入穴を備え、
前記円環部材は、外周面に前記空洞と外気とを連通する圧抜き溝を備え、
前記注入穴から前記空洞に充填されている接着体を有していること、
を特徴とするステータ。

A stator,
A yoke extending in the circumferential direction;
Teeth projecting radially from the inner peripheral surface of the yoke;
An insulating member comprising: a circumferential wall portion covering at least a part of a circumferential end surface of the tooth; and a flange having a plate wall portion extending outward from at least the axial end surface of the tooth on the inner circumferential surface side of the yoke. When,
A coil wound around the outside of the circumferential wall portion;
An annular member that is attached to the distal end side of the teeth and closes the opening on the distal end side of the teeth of the cavity between the axial end surface of the teeth and the inner surface of the coil;
The plate wall portion closes an opening of the cavity on the yoke side, and includes an injection hole for injecting an adhesive into the cavity,
The annular member includes a pressure release groove that communicates the cavity and outside air on an outer peripheral surface,
Having an adhesive filled into the cavity from the injection hole;
Stator characterized by.

JP2015206469A 2015-10-20 2015-10-20 Stator Pending JP2017079536A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018007452A (en) * 2016-07-05 2018-01-11 トヨタ自動車株式会社 Stator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018007452A (en) * 2016-07-05 2018-01-11 トヨタ自動車株式会社 Stator

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