JP3896882B2

JP3896882B2 - Rotating electric machine

Info

Publication number: JP3896882B2
Application number: JP2002091536A
Authority: JP
Inventors: 俊雄菊池; 真一郎北田; 雄太郎金子; 孝恒吉
Original assignee: Nissan Motor Co Ltd
Current assignee: Nissan Motor Co Ltd
Priority date: 2002-03-28
Filing date: 2002-03-28
Publication date: 2007-03-22
Anticipated expiration: 2022-03-28
Also published as: JP2003289650A

Description

【０００１】
【発明の属する技術分野】
本発明は、冷却機構をもった回転電機に関する。
【０００２】
【従来の技術】
従来からステータを冷却するため、ステータ内周面に開口するスロットの開口部を閉塞してスロット内部をステータコイルが収装された状態で冷媒通路とするモータが知られており、例えば、特開平４−３６４３４３号公報に開示されたものがある。
【０００３】
この従来例によれば、ステータコイルのコイルエンドを収容するカバー部材をステータの前後に固定して備える。カバー部材は冷媒通路に連通して冷媒を給排する冷却ジャケットを形成している。
【０００４】
【発明が解決しようとする課題】
しかしながら、上記従来例では、冷却ジャケットを構成するカバー部材をＯリングを介在させて多数のねじ等により固定しているため、その組付け性が悪くモータの組立作業性の向上に限界があった。
【０００５】
本発明は、上記問題点に鑑みてなされたもので、組立作業性のよい冷却機構を備えた回転電機を提供することを目的とする。
【０００６】
【課題を解決するための手段】
本願発明は、ステータコアのスロットにコイルを収容し、ステータ内周面に開口するスロットの開口部を閉塞してスロット内部に冷媒通路を形成した回転電機において、隣合うティース部先端の円周方向端部同士を閉塞部材で連結してスロットの開口部を閉塞し、側面の内周部にティース部の端面と閉塞部材の端面とが露出するステータと、前記ステータを内周に固定して備えるケース本体と、前記ケース本体の端部に組付けられてケース端部を構成するケース端部材と、前記ケース端部材に設けられ、ステータに向けて軸方向に突出する筒部材と、前記筒部材の突出した先端側端部と前記ステータのティース部の端面および閉塞部材の端面とに当接するように周方向に配置されるシール部材とを備え、前記筒部材は、ケース端部材をケース本体に組付けたときにシール部材をステータのティース部の端面および閉塞部材の端面との間で軸方向に押し潰してケース端部材とステータとを連結し、その外周側にケース本体、ケース端部材、ステータとで画成され、冷媒通路に連通した環状の冷却ジャケットを構成することを特徴とする。
【０００７】
前記ステータは、ステータコアのみならず、ステータコアに固定したもの、および、一体に設けられるもの等の付随する部材等を含む総体的なものとして記述している。
【０００８】
【発明の効果】
したがって、本願発明では、ケース端部材をケース本体に組付けると同時に筒部材とシール部材とにより環状の冷却ジャケットを形成することができ、冷却ジャケットを形成する作業を容易とできる。
【０００９】
【発明の実施の形態】
以下、本発明の一実施形態を添付図面に基づいて説明する。
【００１０】
図１、図２に回転電機（モータ、または発電機、またはモータ兼発電機）の全体構成を示す。図１は図２のＢ−Ｂ線による断面図、図２は図１のＡ−Ａ線による断面図である。
【００１１】
図１において、回転電機のケース１は、ケース本体を構成する円筒板１Ａと、この円筒板１Ａの軸方向両端の開口を閉塞するケース端部材としての側板１Ｂ、１Ｃからなる。
【００１２】
ケース１内には、円柱形のロータ２を収容している。ロータ２は、その回転軸２Ａの両端が夫々ベアリング３を介して側板１Ａ、１Ｂに支持され、回転軸２Ａを中心に回転自在である。
【００１３】
円筒板１Ａの内周面には、円筒形のステータ５が、ロータ２の外周を取り囲むように配置し固定して備える。ステータ５の内周面とロータ２の外周面との間には、所定の間隙を設けている。
【００１４】
ステータ５の軸方向の両端とケース１の内側との間には、環状空間からなる冷却ジャケット１０、１１を形成している。冷却ジャケット１０には円筒板１Ａを貫通するオイル供給口１６を介して、冷却用オイルが供給される。この冷却オイルは、ステータ５内に形成された冷媒通路１５（図２参照）を流通して、反対側の冷却ジャケット１１へ導かれる。この冷却オイルは、冷却ジャケット１１に形成されて円筒板１Ａを貫通するオイル排出口１７から外部へ排出される。
【００１５】
図２に示すように、ステータ５は、ステータコア６と、このステータコア６の周囲に巻装されるコイル７とから構成される。
【００１６】
スタータコア６は、所定個数（本実施の形態では１２個）の分割コア６Ａを、円環状に連ねて構成している（分割コア構造）。各分割コア６Ａは、略丁字型の電磁鋼板を、ロータ２の回転軸２Ａ方向（図２の紙面に垂直方向）に所定枚数だけ積層して形成している。
【００１７】
ステ一夕コア６（分割コア６Ａ）は、ケース１の円筒板１Ａ内周面に沿うリング状のバックコア部６Ｂと、このバックコア部６Ｂからステータコア６の内周側半径方向に突出するティース部６Ｃとを備える。
【００１８】
隣接するティース部６Ｃの間の凹部（溝部）は、スロット６Ｄを構成する。コイル７は、各ティース部６Ｃに集中巻きされ、スロット６Ｄ内部に収容される。
【００１９】
スロット６Ｄを前記冷却ジャケット１０からの冷却用のオイルを通す冷媒通路１５とするため、スロット６Ｄのロータ２の外周に面した開口部６Ｅにはステータ５内周面と同一面となるように樹脂材料が充填される。形成された樹脂層１４は、スロット開口部６Ｅを閉塞し、冷媒通路１５をステータ５の内周から密封する。ステータ５の側面には、スロット６Ｄによる冷媒通路１５が内周部が樹脂層１４により閉塞された状態で開口し、ステータコア６の端面と樹脂層１４の端面とが露出する。
【００２０】
前記冷却ジャケット１０、１１は、以下の各実施の形態に記載した構成により、ロータ２および回転軸２Ａを含むステータ５の内周空間から画成される。この冷却ジャケット１０、１１の構成方法について、以下、図１から図１８を参照して詳しく説明する。
【００２１】
（第１の実施の形態）
以下、本発明における回転電機を実現する実施の形態を、請求項１〜請求項４に対応する第１の実施形態に基づいて説明する。
【００２２】
図１は、冷却ジャケット１０、１１の構成に係わる第１の実施の形態を示している。即ち、前記冷却ジャケット１０、１１を形成するために、夫々の側板１Ｂ、１Ｃには筒部材４を固定して備える。筒部材４はステータ５内周面の樹脂層１４と同等の内外周を備え、組立時にステータ５と同心となるよう側板１Ｂ、１Ｃに固定している。筒部材４の固定は、側板１Ｂ、１Ｃに環状の溝１Ｄを形成し、この溝１Ｄに筒部材４の端部を挿入した状態でロー付けや溶接等により行われる。筒部材４を保持した状態で、側板１Ｂ、１Ｃを円筒板１Ａに組立て固定すると、筒部材４はステータ５の樹脂層１４と内外周が一致して、その先端とステータ５側面（内周側）の樹脂層１４の端面とが対向する。この対向した端面間には、シール部材８を配置する。シール部材８は、対向端面間に圧縮され押し潰されて筒部材１４の内外間のシールを行う。シール部材８はいずれか一方の対向端面に固定されると、上記の組立時に半径方向にずれることを防止できる。図示の形態においては、筒部材４の先端に弾性体としてのゴムを溶着して固定する。冷却ジャケット１０、１１は、側板１Ｂ、１Ｃおよび筒部材４と円筒板１Ａおよびステータ５側面により画成されて環状の空間に形成される。冷却ジャケット１０、１１内にはステータコイル７のエンドコイルが収容され、スロット６Ｄで形成した冷媒通路１５がステータコイル７を収容して開口する。
【００２３】
上記冷却ジャケット１０、１１の構成方法においては、回転電機のケース本体を構成する円筒板１Ａの内周に、下記構成のステータ５を固定して備える。即ち、ステータ５はそのスロット６Ｄにステータコイル７を収容し、スロット６Ｄのステータ５内周側のスロット開口６Ｅを樹脂層１４により閉塞し、ステータ５両端面間を連通させる冷媒通路１５を備えている。
【００２４】
他方、ケース端部部材を構成する側板１Ｂ、１Ｃには、先端にシール部材８を固定して備える筒部材４を固定している。
【００２５】
組立のために、ケース本体を構成する円筒板１Ａの側方にケース端部部材を構成する側板１Ｂ、１Ｃを位置決めすると、円筒板１Ａの内周に固定されたステータ５の端面に、側板１Ｂ、１Ｃに固定した筒部材４の先端のシール部材８が当接する。この状態において、両側板１Ｂ、１Ｃと円筒板１Ａとを固定ボルト等により締め付けると、筒部材４先端とステータ５側面とが更に近接し、筒部材４に固定されているシール部材８が両者間に潰されてシール性能を発揮する。ステータ５の端面には、ロータ２が存在する空間から画成された環状空間が形成され、冷却ジャケット１０、１１に構成することができる。
【００２６】
図３〜５は、本実施の形態の冷却ジャケットの構成方法の変形例を示す。各図は、冷却ジャケット１０を構成する要部のみを図示するが、冷却ジャケット１１側においても同様に構成している。
【００２７】
図３に示す冷却ジャケットの構成方法においては、筒部材４のシール部材８を組付ける先端の形状を、段付１２を介して小径部１３をステータ５側に突出させた段付形状に構成したものである。シール部材８は、筒部材４の先端の段付１２部分に当接し小径部１３に嵌合させて配置している。
【００２８】
円筒板１Ａに側板１Ｂ、１Ｃを固定する組立状態においては、シール部材８は筒部材４の小径部１３に嵌合し、段付１２とステータ５の端面との間で圧縮され潰されてシール機能を発揮する。シール部材８は、円形断面のＯリングにより構成でき、筒部材４に接着等の固定手段を施す必要はないが、接着することでより脱落等に対する信頼性が向上する。図示するように、ステータ５側の端面に配置する絶縁体１８の内周側端によってシール部材８が半径方向外側に迫り出さないようにしてもよい。
【００２９】
図４に示す冷却ジャケット１０、１１の構成方法においては、筒部材４のシール部材８を組付ける先端の形状を、先端面に沿って環状の溝１９等による凹形状に形成したものである。シール部材８は、凹形状となっている環状の溝１９に挿入されて固定され、溝１９から出っ張っている部分がステータ５の側面に当接して潰されてシール機能を発揮する。シール部材８は溝１９に嵌合されているため、容易に外れることがない。
【００３０】
図５に示す冷却ジャケット１０、１１の構成方法においては、筒部材４の内外周および先端を覆ってシール部材８を構成するゴムが焼き付け等により接着されている。筒部材４の先端に位置するゴムは、ステータ５の側面に当接して潰されてシール機能を発揮する。冷却ジャケット１０、１１を構成する環状空間に面する表面部分がゴムにより覆われているため、ステータコイル７の特にコイルエンドが筒部材４に接触することが防止でき、コイル７とケース１間の絶縁の信頼性が向上する。
【００３１】
本実施の形態においては、下記に記載した効果を奏することができる。
【００３２】
（ア）ケース本体である円筒板１Ａにケース端部材である側板１Ｂ、１Ｃを組付け固定するのと同時に、側板１Ｂ、１Ｃに固定した筒部材４がシール部材８を介してステータ５に当接し、円筒板１Ａ、側板１Ｂ（または１Ｃ）、および、ステータ５とで区画して冷却ジャケット１０（または１１）を形成するため、冷却ジャケット１０、１１を形成する作業を容易とできる。
【００３３】
（イ）ステータ５側には冷却ジャケット１０、１１を構成するための部材を必要とせず、構成が簡単であり、スロット６Ｄの開口部６Ｅを閉塞する樹脂層１４の形成も容易となる。
【００３４】
（ウ）側板１Ｂ、１Ｃを円筒板１Ａに固定することで、筒部材４によりステータコア６を積層方向に圧縮するため、ステータコア６側には無理な荷重が作用しない。
【００３５】
（エ）図３に示す変形例では、筒部材４の先端を段付１２を持って小径部１３となる段付形状に構成し、シール部材８を小径部１３に嵌合して配置するため、単純な「Ｏ」形状のシール、即ち、Ｏリングシールを使うことができる。また、シール部材８は小径部１３に嵌合して配置されるため、脱落等が低減する。
【００３６】
（オ）図４に示す変形例では、筒部材４の先端を先端面に沿って環状の溝１９による凹形状に形成し、シール部材８を筒部材４の溝１９に一部を挿入して配置するため、シール部材８の離脱をより一層低減できる。
【００３７】
（カ）図５に示す変形例では、シール部材８を筒部材４の外周側においてケース端部材である側板１Ｂ、１Ｃに向かって延設して筒部材４の冷却ジャケット１０、１１と接触する部分を覆うため、筒部材４が導電性の材料、例えば、金属製であっても、コイル７とケース１間の絶縁性が向上する。
【００３９】
図６は、冷却ジャケット１０、１１の構成に係わる参考例１を示している。参考例１においては、ステータ５の端面内周部から第２筒部材としての樹脂製の円筒部２０を形成し、この円筒部２０の先端と側板１Ｂ、１Ｃ側の筒部材４の先端との間にシール部材８を配置するものである。円筒部２０は、ステータコア６の内周に開口するスロット開口部６Ｅを樹脂により閉塞して樹脂層１４を形成する際に用いる内周側型と外周側型との成形空間をステータコア６部分より軸方向外方に環状空間にして延長することで、樹脂層１４と一体に設けている。樹脂層１４はステータコア６のスロット開口部６Ｅでティース部６Ｃの先端を連結して間欠的に形成されるも、それに連なる環状空間で形成される円筒部２０はステータ５の端部から環状に突出する。円筒部２０の先端面は、前記成形型により形成されるため、精度よく円滑な表面に形成される。
【００４０】
シール部材８は、側板１Ｂ、１Ｃに一体となった筒部材４の先端に、焼き付け等により接着されており、円筒部２０の先端面に接触するとき、円筒部２０の平滑な表面に接触して潰されて、高いシール性を発揮する。
【００４１】
図７〜図１０は、参考例１の冷却ジャケットの構成方法の変形例を示す。各図は、冷却ジャケット１０を構成する要部のみを図示するが、冷却ジャケット１１側においても同様に構成している。
【００４２】
図７に示す冷却ジャケットの構成方法においては、筒部材４のシール部材８を組付ける先端の形状を、内周側でステータ５側に突出させて外径を段付１２をもって小径部１３とした段付形状に構成したものである。シール部材８は、筒部材４の先端の段付１２に当接し小径部１３に嵌合させて配置している。
【００４３】
円筒板１Ａに側板１Ｂ、１Ｃを固定する組立状態においては、シール部材８は筒部材４の小径部１３に嵌合し、段付部１２とステータ５から突出する円筒部２０の先端面との間で圧縮され潰されてシール機能を発揮する。シール部材８は、円形断面のＯリングにより構成でき、筒部材４に接着等の固定手段を施す必要はないが、接着することでより脱落等に対する信頼性が向上する。
【００４４】
図８に示す冷却ジャケット１０、１１の構成方法においては、筒部材４のシール部材８を組付ける先端の形状を、先端面に沿って環状の溝１９等による凹形状に形成したものである。シール部材８は、凹形状となっている環状の溝１９に挿入されて固定され、溝１９から出っ張っている部分がステータ５から突出する円筒部２０の先端面に当接して潰されてシール機能を発揮する。シール部材８は溝１９に嵌合されているため、容易に外れることがない。
【００４５】
図９に示す冷却ジャケット１０、１１の構成方法においては、筒部材４の内外周および先端を覆ってシール部材８を構成するゴムが焼き付け等により接着されている。筒部材４の先端に位置するゴムは、ステータ５から環状に突出する円筒部２０の端面に当接して潰されてシール機能を発揮する。冷却ジャケット１０、１１を構成する環状空間に面する表面部分がゴムにより覆われかつ円筒部２０に隔てられているため、ステータコイル７の特にコイルエンドが筒部材４に接触することが防止でき、筒部材４が導電性の材料、例えば、金属製で形成されていても、コイル７とケース１間の絶縁の信頼性がより一層向上する。
【００４６】
図１０に示す冷却ジャケット１０、１１の構成方法においては、円筒部２０の先端に段付２１を挟んで内径を増加させた段付穴２２を備える。段付穴２２は、樹脂層１４と一体に成形する際の成形型を変更することで形成可能である。他方、側板１Ｂ、１Ｃに固定の筒部材４は若干小径に形成され、その先端の形状を、内周側でステータ５側に突出させて外径を段付１２をもって小径部１３とした段付形状に構成したものである。シール部材８は、筒部材４の先端の段付部１２に当接し小径部１３に嵌合させて配置している。
【００４７】
円筒板１Ａに側板１Ｂ、１Ｃを固定する組立状態においては、シール部材８は筒部材４の小径部１３に嵌合し、段付部１２とステータ５の端面から突出する円筒部２０の先端の段付２１との間で圧縮され潰されてシール機能を発揮する。シール部材８は、互に対向する段付形状となった円筒部２０と筒部材４の各先端の段付１２、２１で囲まれるよう配置され、軸方向や半径方向へのズレが生じない。このため、シール部材８は、円形断面のＯリングにより構成でき、筒部材４に接着等の固定手段を施す必要がなく、脱落等に対する信頼性が向上する。なお、上記の例では、円筒部２０側に段付穴２２を、筒部材４に段付小径１３を持たせるようにしているが、段付部分が互に対向していれば、図示しないが、筒部材４に段付内径を設け、円筒部２０に段付小径を持つようにしてもよい。この場合、筒部材４の内外径を若干増加させて側板１Ｂ、１Ｃに配置する必要がある。
【００４８】
参考例１においては、下記に記載した特徴を備える。
【００４９】
（キ）ステータ５にスロット６Ｄの開口部６Ｅを閉塞する樹脂層１４をステータ５端部より環状に突出させた円筒部２０を設け、この円筒部２０と筒部材４との間でシール部材８を挟み込むようにしたため、図１〜４に示すステータ５と樹脂層１４による表面に対して円筒部２０の表面は平滑性が良好であり、接触するシール部材８とによりシール性能をより向上できる。
【００５０】
（ク）図１０に示す変形例においては、筒部材４と円筒部２０の先端を、互に対向する段付形状に構成して、両者の段付形状部分に挟んでシール部材８を配置したため、シール部材８は筒部材４と円筒部２０との段付形状部分に囲まれ、シール部材８を外れにくくできる。
【００５２】
図１１は、冷却ジャケット１０、１１の構成に係わる参考例２を示している。図は、冷却ジャケット１０を構成する要部のみを図示するが、冷却ジャケット１１側においても同様に構成している。参考例２においては、ステータ５の端面から突出させて形成する円筒部２０の先端にシール部材８を配置するものである。
【００５３】
シール部材８は、略円形断面を備えるもその軸方向側方には溝２４をシール部材８に沿って環状に形成している。前記溝２４は、円筒部２０の先端に係合してその上下面を挟み込んでシール部材８を円筒部２０に固定する。
【００５４】
前記円筒部２０の先端に位置するシール部材８は、筒部材４と対面し、筒部材４の先端面と円筒部２０の先端面との間で挟まれ、潰されてシール機能を発揮する。シール部材８は、ステータ５側面から僅かに突出した円筒部２０の先端に係合固定されるため、ケース端部を構成する側板１Ｂ、１Ｃをケース本体である円筒板１Ａに固定する組立中に離脱することがない。
【００５５】
図１２〜図１４は、参考例２の冷却ジャケットの構成方法の変形例を示す。各図は、冷却ジャケット１０を構成する要部のみを図示するが、冷却ジャケット１１側においても同様に構成している。
【００５６】
図１２に示す冷却ジャケットの構成方法においては、円筒部２０のシール部材８を組付ける先端の形状を、内周側で筒部材４側に突出させて外径を段付２５をもって小径部２６とした段付形状に構成したものである。シール部材８は、円筒部２０の先端の段付２５に当接し小径部２６に嵌合させて配置している。
【００５７】
円筒板１Ａに側板１Ｂ、１Ｃを固定する組立状態においては、シール部材８は円筒部２０の小径部２６に嵌合し、段付２５と側板１Ｂ、１Ｃから突出する筒部材４の先端面との間で圧縮され潰されてシール機能を発揮する。シール部材８は、円形断面のＯリングにより構成でき、円筒部２０に接着等の固定手段を施す必要はないが、接着することでより脱落等に対する信頼性が向上する。
【００５８】
図１３に示す冷却ジャケット１０、１１の構成方法においては、円筒部２０のシール部材８を組付ける先端の形状を、先端面に沿って環状の溝２７等による凹形状に形成したものである。シール部材８は、凹形状となっている環状の溝２７に挿入されて固定され、溝２７から出っ張っている部分が側板１Ｂ、１Ｃから突出する筒部材４の先端面に当接して潰されてシール機能を発揮する。シール部材８は溝２７に嵌合されているため、容易に外れることがない。
【００５９】
図１４に示す冷却ジャケット１０、１１の構成方法においては、円筒部２０の先端に外径を段付２５を挟んで小径部２６とした段付外径部を備える。段付外径部は、樹脂層１４と一体に成形する際の成形型を変更することで形成可能である。他方、側板１Ｂ、１Ｃに固定の筒部材４は、その先端の形状を、外周側でステータ５側に突出させて内径を段付２８をもって大きくした段付穴２９に構成したものである。シール部材８は、円筒部２０の先端の小径軸２６に嵌合させ段付２５に当接させて配置している。
【００６０】
円筒板１Ａに側板１Ｂ、１Ｃを固定する組立状態においては、シール部材８は円筒部２０の小径軸２６に嵌合し、段付２５と側板１Ｂ、１Ｃから突出する筒部材４の先端の段付２８との間で圧縮され潰されてシール機能を発揮する。シール部材８は、互に対向する段付形状となった円筒部２０と筒部材４の各先端の段付部分で囲まれるよう配置され、軸方向や半径方向へのズレが生じない。このため、シール部材８は、円形断面のＯリングにより構成でき、円筒部２０に接着等の固定手段を施す必要がなく、脱落等に対する信頼性が向上する。
【００６１】
参考例２においては、下記に記載した特徴を備える。
【００６２】
（ケ）シール部材８を円筒部２０の先端に固定して配置するため、ケース本体としての円筒板１Ａの奥まった部位に位置しており、ケース端部材としての側板１Ｂ、１Ｃを円筒板１Ａに組付ける途中においてシール部材８が離脱する虞が減小できる。
【００６４】
図１５は、冷却ジャケット１０、１１の構成に係わる参考例３を示している。図は、冷却ジャケット１０を構成する要部のみを図示するが、冷却ジャケット１１側においても同様に構成している。参考例３においては、ケース端部材としての側板１Ｂ、１Ｃに突出形成した筒部材４とステータ５の端面内周部からの円筒部２０との両先端にシール部材８を装着して構成している。
【００６５】
筒部材４の先端に装着するシール部材８は、ゴムを溶着して固定する。円筒部２０の先端に装着するシール部材８は、略円形断面を備えるもその軸方向側方には溝２４をシール部材８に沿って環状に形成している。前記溝２４は、円筒部２０の先端に係合してその上下面を挟み込んでシール部材８を円筒部２０に固定する。
【００６６】
側板１Ｂ、１Ｃをケース本体の円筒板１Ａに固定して組立てた場合には、円筒部２０先端のシール部材８と筒部材４先端のシール部材８とは、互に当接し、円筒板１Ａと側板１Ｂ、１Ｃとの締め付けに応じて弾性変形しつつ押し潰されてシール効果を発揮する。
【００６７】
図１６〜図１８は、参考例３の冷却ジャケットの構成方法の変形例を示す。各図は、冷却ジャケット１０を構成する要部のみを図示するが、冷却ジャケット１１側においても同様に構成している。
【００６８】
図１６に示す冷却ジャケット１０、１１の構成方法においては、筒部材４の先端に先端面に沿って環状の溝１９等による凹形状に形成し、凹形状となっている環状の溝１９にシール部材８を挿入して固定する。円筒部２０の先端にも、同様に、先端面に沿って環状の溝３０による凹形状に形成し、凹形状となっている環状の溝３０にシール部材８を挿入して固定する。側板１Ｂ、１Ｃと円筒板１Ａの組立時において、各シール部材８は、各先端の溝１９、３０から出っ張っている部分同士を接触させ、円筒板１Ａと側板１Ｂ、１Ｃとの締め付けに応じて弾性変形しつつ押し潰されてシール効果を発揮する。
【００６９】
図１７に示す冷却ジャケット１０、１１の構成方法においては、図１５における筒部材４に装着するシール部材８を、筒部材４の内外周および先端を覆ってシール部材８を構成するゴムが焼き付け等により接着して形成する。側板１Ｂ、１Ｃと円筒板１Ａの組立時において、各シール部材８は、筒部材４および円筒部２０の各先端間に位置する部分が接触し、円筒板１Ａと側板１Ｂ、１Ｃとの締め付けに応じて各先端間のシール部材８が弾性変形しつつ押し潰されてシール効果を発揮する。また、シール部材８を筒部材４の外周側においてケース端部材である側板１Ｂ、１Ｃに向かって延設して筒部材４の冷却ジャケット１０、１１と接触する部分を覆うため、筒部材４が導電性の材料、例えば、金属製であっても、コイル７とケース１間の絶縁性が向上する。
【００７０】
図１８に示す冷却ジャケット１０、１１の構成方法においては、図１７における円筒部２０に装着するシール部材８を、図１６と同様に、円筒部２０の先端に先端面に沿って凹形状に形成した環状の溝３０に挿入して固定したものである。この変形例においても、図１７と同様に、円筒板１Ａと側板１Ｂ、１Ｃとの締め付けに応じて各先端間のシール部材８が弾性変形しつつ押し潰されてシール効果を発揮する。また、シール部材８を筒部材４の外周側においてケース端部材である側板１Ｂ、１Ｃに向かって延設して筒部材４の冷却ジャケット１０、１１と接触する部分を覆うため、筒部材４が導電性の材料、例えば、金属製であっても、コイル７とケース１間の絶縁性が向上する。
【００７１】
参考例３においては、下記に記載した特徴を備える。
【００７２】
（コ）円筒部２０と筒部材４との夫々先端にシール部材８を配置し、ケース端部材である側板１Ｂ、１Ｃをケース本体である円筒板１Ａに組付けた時、夫々のシール部材８を軸方向に押し潰すようにしているため、冷却ジャケット１０、１１のシール性能が向上する。
【図面の簡単な説明】
【図１】本発明の第１の実施形態を示す回転電機の図２のＢ−Ｂ線による断面図。
【図２】同じく図１のＡ−Ａ線による断面図。
【図３】第１の実施形態の変形例を示す部分断面図。
【図４】第１の実施形態の別の変形例を示す部分断面図。
【図５】第１の実施形態のさらに別の変形例を示す部分断面図。
【図６】参考例１を示す回転電機の断面図。
【図７】参考例１の変形例を示す部分断面図。
【図８】参考例１の別の変形例を示す部分断面図。
【図９】参考例１のさらに別の変形例を示す部分断面図。
【図１０】参考例１のさらに別の変形例を示す部分断面図。
【図１１】参考例２を示す回転電機の部分断面図。
【図１２】参考例２の変形例を示す部分断面図。
【図１３】参考例２の別の変形例を示す部分断面図。
【図１４】参考例２のさらに別の変形例を示す部分断面図。
【図１５】参考例３を示す回転電機の部分断面図。
【図１６】参考例３の変形例を示す部分断面図。
【図１７】参考例３の別の変形例を示す部分断面図。
【図１８】参考例３のさらに別の変形例を示す部分断面図。
【符号の説明】
１ケース
１Ａケース本体としての円筒板
１Ｂ、１Ｃケース端部材としての側板
２ロータ
３軸受け
４筒部材
５ステータ
６ステータコア
７ステータコイル
８シール部材
１０、１１冷却ジャケット
１２、２１、２５、２８段付
１３、２６小径部
１４樹脂層
１５冷媒通路
１６オイル供給口
１７オイル排出口
１９、２７、３０溝
２０円筒部
２２、２９段付穴[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotating electrical machine having a cooling mechanism.
[0002]
[Prior art]
Conventionally, in order to cool the stator, there is known a motor in which the opening portion of the slot opened on the inner peripheral surface of the stator is closed and the stator coil is accommodated inside the slot and the refrigerant passage is used. There is one disclosed in Japanese Patent No. 4-364343.
[0003]
According to this conventional example, the cover member that accommodates the coil end of the stator coil is fixed to the front and rear of the stator. The cover member communicates with the refrigerant passage to form a cooling jacket that supplies and discharges the refrigerant.
[0004]
[Problems to be solved by the invention]
However, in the above-mentioned conventional example, the cover member constituting the cooling jacket is fixed by a large number of screws or the like with an O-ring interposed therebetween, so that the assembling performance is poor and there is a limit to the improvement of the motor assembly workability. .
[0005]
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a rotating electrical machine including a cooling mechanism with good assembling workability.
[0006]
[Means for Solving the Problems]
The present invention is In a rotating electrical machine that houses a coil in a slot of a stator core, closes an opening of the slot that opens on the inner peripheral surface of the stator, and forms a refrigerant passage inside the slot. The circumferential end portions of adjacent teeth portion tips are connected by a closing member to close the opening of the slot, and the stator in which the end surface of the teeth portion and the end surface of the closing member are exposed on the inner peripheral portion of the side surface, A case body provided with a stator fixed to the inner periphery; Said A case end member which is assembled to the end of the case body and constitutes the case end; Said A cylindrical member provided on the case end member and protruding in the axial direction toward the stator; and the cylindrical member In the circumferential direction so as to come into contact with the protruding end side end portion of the stator, the end surface of the teeth portion of the stator and the end surface of the closing member And the cylindrical member is arranged so that the seal member is attached to the stator when the case end member is assembled to the case body. Teeth end face and closing member end face The case end member and the stator are connected to each other by axial crushing, and an annular cooling jacket that is defined by the case main body, the case end member, and the stator on the outer peripheral side and communicated with the refrigerant passage is configured. It is characterized by that.
[0007]
The stator is described as a whole including not only the stator core but also a member fixed to the stator core and an accompanying member such as one provided integrally.
[0008]
【The invention's effect】
Therefore, In the present invention In addition, the annular cooling jacket can be formed by the cylindrical member and the seal member at the same time that the case end member is assembled to the case body, and the operation of forming the cooling jacket can be facilitated.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
[0010]
1 and 2 show the entire configuration of a rotating electrical machine (motor, generator, or motor / generator). 1 is a cross-sectional view taken along line BB in FIG. 2, and FIG. 2 is a cross-sectional view taken along line AA in FIG.
[0011]
In FIG. 1, a case 1 of a rotating electrical machine includes a cylindrical plate 1A that constitutes a case body, and side plates 1B and 1C as case end members that close openings at both ends in the axial direction of the cylindrical plate 1A.
[0012]
A cylindrical rotor 2 is accommodated in the case 1. The rotor 2 has both ends of a rotating shaft 2A supported by side plates 1A and 1B via bearings 3, respectively, and is rotatable about the rotating shaft 2A.
[0013]
A cylindrical stator 5 is arranged and fixed on the inner peripheral surface of the cylindrical plate 1 A so as to surround the outer periphery of the rotor 2. A predetermined gap is provided between the inner peripheral surface of the stator 5 and the outer peripheral surface of the rotor 2.
[0014]
Cooling jackets 10 and 11 formed of an annular space are formed between both axial ends of the stator 5 and the inside of the case 1. Cooling oil is supplied to the cooling jacket 10 through an oil supply port 16 penetrating the cylindrical plate 1A. This cooling oil flows through the refrigerant passage 15 (see FIG. 2) formed in the stator 5 and is guided to the cooling jacket 11 on the opposite side. This cooling oil is discharged to the outside from an oil discharge port 17 formed in the cooling jacket 11 and penetrating the cylindrical plate 1A.
[0015]
As shown in FIG. 2, the stator 5 includes a stator core 6 and a coil 7 wound around the stator core 6.
[0016]
The starter core 6 includes a predetermined number (12 in this embodiment) of divided cores 6A that are connected in an annular shape (divided core structure). Each divided core 6A is formed by laminating a predetermined number of substantially letter-shaped electromagnetic steel sheets in the direction of the rotation axis 2A of the rotor 2 (perpendicular to the plane of FIG. 2).
[0017]
The steering core 6 (divided core 6A) includes a ring-shaped back core portion 6B along the inner peripheral surface of the cylindrical plate 1A of the case 1 and teeth protruding in the radial direction of the inner peripheral side of the stator core 6 from the back core portion 6B. 6C.
[0018]
A recess (groove) between adjacent teeth 6C constitutes a slot 6D. The coil 7 is concentratedly wound around each tooth portion 6C and accommodated in the slot 6D.
[0019]
Since the slot 6D serves as the refrigerant passage 15 through which the cooling oil from the cooling jacket 10 passes, the opening 6E facing the outer periphery of the rotor 2 in the slot 6D is made to be flush with the inner peripheral surface of the stator 5. Material is filled. The formed resin layer 14 closes the slot opening 6 E and seals the refrigerant passage 15 from the inner periphery of the stator 5. On the side surface of the stator 5, the refrigerant passage 15 by the slot 6 D is opened in a state where the inner peripheral portion is closed by the resin layer 14, and the end surface of the stator core 6 and the end surface of the resin layer 14 are exposed.
[0020]
The cooling jackets 10 and 11 are defined from the inner circumferential space of the stator 5 including the rotor 2 and the rotating shaft 2A by the configuration described in the following embodiments. Hereinafter, a method for configuring the cooling jackets 10 and 11 will be described in detail with reference to FIGS.
[0021]
(First embodiment)
Hereinafter, an embodiment for realizing a rotating electrical machine according to the present invention will be described based on a first embodiment corresponding to claims 1 to 4.
[0022]
FIG. 1 shows a first embodiment relating to the configuration of the cooling jackets 10 and 11. That is, in order to form the cooling jackets 10 and 11, the cylindrical members 4 are fixedly provided on the side plates 1B and 1C, respectively. The cylindrical member 4 has an inner and outer periphery equivalent to the resin layer 14 on the inner peripheral surface of the stator 5 and is fixed to the side plates 1B and 1C so as to be concentric with the stator 5 at the time of assembly. The cylindrical member 4 is fixed by brazing, welding, or the like with an annular groove 1D formed in the side plates 1B and 1C and the end of the cylindrical member 4 inserted into the groove 1D. When the side plates 1B and 1C are assembled and fixed to the cylindrical plate 1A with the cylindrical member 4 held, the cylindrical member 4 is aligned with the resin layer 14 of the stator 5 on the inner and outer periphery, and the tip and the side surface of the stator 5 (inner peripheral side). ) Is opposed to the end surface of the resin layer 14. A seal member 8 is disposed between the opposed end faces. The seal member 8 is compressed and crushed between the opposed end surfaces to seal the inside and outside of the cylindrical member 14. When the seal member 8 is fixed to either one of the opposing end surfaces, it can be prevented that the seal member 8 is displaced in the radial direction during the assembly. In the illustrated embodiment, rubber as an elastic body is welded and fixed to the tip of the cylindrical member 4. The cooling jackets 10 and 11 are defined by the side plates 1B and 1C, the cylindrical member 4, the cylindrical plate 1A and the side surface of the stator 5, and are formed in an annular space. End coils of the stator coil 7 are accommodated in the cooling jackets 10 and 11, and a refrigerant passage 15 formed by the slot 6D accommodates the stator coil 7 and opens.
[0023]
In the configuration method of the cooling jackets 10 and 11, the stator 5 having the following configuration is fixedly provided on the inner periphery of the cylindrical plate 1A constituting the case body of the rotating electrical machine. That is, the stator 5 includes the stator coil 7 in the slot 6D, the slot opening 6E on the inner peripheral side of the stator 6 of the slot 6D is closed by the resin layer 14, and the refrigerant passage 15 is provided to communicate between both end faces of the stator 5. Yes.
[0024]
On the other hand, a cylindrical member 4 provided with a seal member 8 fixed to the tip is fixed to the side plates 1B and 1C constituting the case end member.
[0025]
For assembly, when the side plates 1B and 1C constituting the case end member are positioned on the side of the cylindrical plate 1A constituting the case body, the side plate 1B is placed on the end surface of the stator 5 fixed to the inner periphery of the cylindrical plate 1A. The seal member 8 at the tip of the cylindrical member 4 fixed to 1C abuts. In this state, when the side plates 1B and 1C and the cylindrical plate 1A are tightened with fixing bolts or the like, the distal end of the tubular member 4 and the side surface of the stator 5 are closer to each other, and the seal member 8 fixed to the tubular member 4 is between them. It will be crushed and show sealing performance. An annular space defined from a space in which the rotor 2 exists is formed on the end surface of the stator 5, and can be configured as the cooling jackets 10 and 11.
[0026]
3-5 shows the modification of the structure method of the cooling jacket of this Embodiment. Although each figure shows only the main part which comprises the cooling jacket 10, it has comprised similarly in the cooling jacket 11 side.
[0027]
In the configuration method of the cooling jacket shown in FIG. 3, the shape of the tip to which the sealing member 8 of the cylindrical member 4 is assembled is configured to have a stepped shape in which the small diameter portion 13 protrudes toward the stator 5 via the stepped 12. Is. The seal member 8 is disposed in contact with the stepped 12 portion at the tip of the cylindrical member 4 and fitted into the small diameter portion 13.
[0028]
In the assembled state in which the side plates 1B and 1C are fixed to the cylindrical plate 1A, the seal member 8 is fitted into the small diameter portion 13 of the cylindrical member 4 and is compressed and crushed between the stepped portion 12 and the end surface of the stator 5 to be sealed. Demonstrate the function. The seal member 8 can be constituted by an O-ring having a circular cross section, and it is not necessary to apply fixing means such as adhesion to the cylindrical member 4, but the reliability with respect to dropping or the like is improved by adhesion. As shown in the drawing, the seal member 8 may be prevented from protruding outward in the radial direction by the inner peripheral side end of the insulator 18 arranged on the end surface on the stator 5 side.
[0029]
In the configuration method of the cooling jackets 10 and 11 shown in FIG. 4, the shape of the tip end where the seal member 8 of the cylindrical member 4 is assembled is formed in a concave shape by an annular groove 19 or the like along the tip end surface. The seal member 8 is inserted and fixed in an annular groove 19 having a concave shape, and a portion protruding from the groove 19 is brought into contact with the side surface of the stator 5 to be crushed to exhibit a sealing function. Since the seal member 8 is fitted in the groove 19, it does not easily come off.
[0030]
In the construction method of the cooling jackets 10 and 11 shown in FIG. 5, the rubber constituting the seal member 8 is bonded by baking or the like so as to cover the inner and outer circumferences and the tip of the cylindrical member 4. The rubber located at the tip of the cylindrical member 4 is crushed in contact with the side surface of the stator 5 and exhibits a sealing function. Since the surface portion facing the annular space constituting the cooling jackets 10 and 11 is covered with rubber, it is possible to prevent the coil end, in particular, the coil end of the stator coil 7 from coming into contact with the cylindrical member 4. Insulation reliability is improved.
[0031]
In the present embodiment, the following effects can be achieved.
[0032]
(A) At the same time that the side plates 1B and 1C as the case end members are assembled and fixed to the cylindrical plate 1A as the case body, the cylindrical member 4 fixed to the side plates 1B and 1C contacts the stator 5 via the seal member 8. Since the cooling jacket 10 (or 11) is formed in contact with the cylindrical plate 1A, the side plate 1B (or 1C), and the stator 5, the operation of forming the cooling jackets 10 and 11 can be facilitated.
[0033]
(A) No member for forming the cooling jackets 10 and 11 is required on the stator 5 side, the configuration is simple, and the resin layer 14 that closes the opening 6E of the slot 6D can be easily formed.
[0034]
(C) Since the stator core 6 is compressed in the stacking direction by the cylindrical member 4 by fixing the side plates 1B and 1C to the cylindrical plate 1A, an unreasonable load does not act on the stator core 6 side.
[0035]
(D) In the modification shown in FIG. 3, the end of the cylindrical member 4 is configured to have a stepped shape having the stepped portion 12 to become the small diameter portion 13, and the seal member 8 is fitted to the small diameter portion 13 and arranged. A simple “O” shaped seal, ie an O-ring seal, can be used. Moreover, since the sealing member 8 is fitted and disposed in the small diameter portion 13, dropping or the like is reduced.
[0036]
(E) In the modification shown in FIG. 4, the distal end of the cylindrical member 4 is formed in a concave shape by the annular groove 19 along the distal end surface, and the seal member 8 is partially inserted into the groove 19 of the cylindrical member 4. Due to the arrangement, the separation of the seal member 8 can be further reduced.
[0037]
(F) In the modification shown in FIG. 5, the seal member 8 is extended toward the side plates 1 B and 1 C that are case end members on the outer peripheral side of the cylindrical member 4, and contacts the cooling jackets 10 and 11 of the cylindrical member 4. Since the portion is covered, the insulation between the coil 7 and the case 1 is improved even if the cylindrical member 4 is made of a conductive material, for example, metal.
[0039]
FIG. 6 relates to the configuration of the cooling jackets 10 and 11. Reference example 1 Is shown. Reference example 1 , A cylindrical portion 20 made of resin is formed as the second cylindrical member from the inner peripheral portion of the end surface of the stator 5, and a seal is formed between the distal end of the cylindrical portion 20 and the distal end of the cylindrical member 4 on the side plates 1B and 1C. The member 8 is arranged. The cylindrical portion 20 has a molding space between the inner peripheral side mold and the outer peripheral side mold used when the resin layer 14 is formed by closing the slot opening 6E that opens to the inner periphery of the stator core 6 with resin. The resin layer 14 is provided integrally by extending in an annular space outward in the direction. The resin layer 14 is intermittently formed by connecting the tips of the teeth 6 C at the slot opening 6 E of the stator core 6, but the cylindrical portion 20 formed by the annular space connected to the resin layer 14 projects annularly from the end of the stator 5. To do. Since the front end surface of the cylindrical portion 20 is formed by the molding die, it is formed on a smooth surface with high accuracy.
[0040]
The seal member 8 is bonded to the distal end of the cylindrical member 4 integrated with the side plates 1B and 1C by baking or the like, and contacts the smooth surface of the cylindrical portion 20 when contacting the distal end surface of the cylindrical portion 20. It is crushed and exhibits high sealing performance.
[0041]
FIG. 7 to FIG. Reference example 1 The modification of the structure method of this cooling jacket is shown. Although each figure shows only the main part which comprises the cooling jacket 10, it has comprised similarly in the cooling jacket 11 side.
[0042]
In the cooling jacket configuration method shown in FIG. 7, the shape of the tip to which the sealing member 8 of the cylindrical member 4 is assembled is projected to the stator 5 side on the inner peripheral side, and the outer diameter is stepped 12 to form the small diameter portion 13. It is configured in a stepped shape. The seal member 8 is disposed in contact with the stepped portion 12 at the tip of the cylindrical member 4 and fitted into the small diameter portion 13.
[0043]
In the assembled state in which the side plates 1B and 1C are fixed to the cylindrical plate 1A, the seal member 8 is fitted to the small diameter portion 13 of the cylindrical member 4, and the stepped portion 12 and the tip end surface of the cylindrical portion 20 protruding from the stator 5 are connected. It is compressed and crushed between them to exert the sealing function. The seal member 8 can be constituted by an O-ring having a circular cross section, and it is not necessary to apply fixing means such as adhesion to the cylindrical member 4, but the reliability with respect to dropping or the like is improved by adhesion.
[0044]
In the configuration method of the cooling jackets 10 and 11 shown in FIG. 8, the shape of the tip of the cylindrical member 4 to which the seal member 8 is assembled is formed in a concave shape by an annular groove 19 or the like along the tip surface. The seal member 8 is inserted and fixed in an annular groove 19 having a concave shape, and a portion protruding from the groove 19 is brought into contact with the tip surface of the cylindrical portion 20 protruding from the stator 5 to be crushed and sealed. Demonstrate. Since the seal member 8 is fitted in the groove 19, it does not easily come off.
[0045]
In the configuration method of the cooling jackets 10 and 11 shown in FIG. 9, the rubber constituting the seal member 8 is bonded by baking or the like so as to cover the inner and outer circumferences and the tip of the cylindrical member 4. The rubber located at the tip of the cylindrical member 4 is brought into contact with the end surface of the cylindrical portion 20 projecting in an annular shape from the stator 5 and is crushed to exert a sealing function. Since the surface portion facing the annular space constituting the cooling jackets 10 and 11 is covered with rubber and separated by the cylindrical portion 20, it is possible to prevent the coil end of the stator coil 7 from coming into contact with the cylindrical member 4, Even if the cylindrical member 4 is formed of a conductive material, for example, metal, the reliability of insulation between the coil 7 and the case 1 is further improved.
[0046]
In the configuration method of the cooling jackets 10 and 11 shown in FIG. 10, a stepped hole 22 having an inner diameter increased with a stepped 21 sandwiched at the tip of the cylindrical portion 20 is provided. The stepped hole 22 can be formed by changing a molding die used when integrally molding with the resin layer 14. On the other hand, the cylindrical member 4 fixed to the side plates 1B and 1C is formed to have a slightly small diameter, and the shape of the tip thereof is projected to the stator 5 side on the inner peripheral side, and the outer diameter is stepped 12 to form the small diameter portion 13. It is configured in a shape. The seal member 8 is disposed in contact with the stepped portion 12 at the tip of the cylindrical member 4 and fitted into the small diameter portion 13.
[0047]
In the assembled state in which the side plates 1B and 1C are fixed to the cylindrical plate 1A, the seal member 8 is fitted to the small diameter portion 13 of the cylindrical member 4, and the tip of the cylindrical portion 20 protruding from the end surface of the stepped portion 12 and the stator 5 is used. It is compressed and crushed between the stepped portions 21 and exhibits a sealing function. The seal member 8 is disposed so as to be surrounded by the stepped shapes 12 and 21 at the respective ends of the cylindrical portion 20 and the cylindrical member 4 that are stepped in opposition to each other, and there is no deviation in the axial direction or the radial direction. For this reason, the seal member 8 can be constituted by an O-ring having a circular cross section, and it is not necessary to apply fixing means such as adhesion to the cylindrical member 4, and the reliability against dropping or the like is improved. In the above example, the stepped hole 22 is provided on the cylindrical portion 20 side, and the cylindrical member 4 is provided with the stepped small diameter 13. However, if the stepped portions face each other, they are not illustrated. The cylindrical member 4 may have a stepped inner diameter, and the cylindrical portion 20 may have a stepped small diameter. In this case, it is necessary to slightly increase the inner and outer diameters of the tubular member 4 and arrange them on the side plates 1B and 1C.
[0048]
Reference example 1 In , Listed below With features .
[0049]
(G) A cylindrical portion 20 in which a resin layer 14 that closes the opening 6E of the slot 6D is annularly projected from the end portion of the stator 5 is provided on the stator 5, and the seal member 8 is provided between the cylindrical portion 20 and the cylindrical member 4. 1 to 4, the surface of the cylindrical portion 20 has good smoothness with respect to the surfaces of the stator 5 and the resin layer 14 shown in FIGS. 1 to 4, and the sealing performance can be further improved by the sealing member 8 in contact therewith.
[0050]
(H) In the modification shown in FIG. 10, the tips of the cylindrical member 4 and the cylindrical portion 20 are formed in a stepped shape facing each other, and the seal member 8 is disposed between the stepped shape portions of both. The sealing member 8 is surrounded by a stepped shape portion of the cylindrical member 4 and the cylindrical portion 20, and the sealing member 8 can be hardly detached.
[0052]
FIG. 11 relates to the configuration of the cooling jackets 10 and 11. Reference example 2 Is shown. The figure shows only the main part constituting the cooling jacket 10, but the cooling jacket 11 side is similarly constructed. Reference example 2 In this embodiment, the seal member 8 is disposed at the tip of the cylindrical portion 20 formed by projecting from the end face of the stator 5.
[0053]
Although the seal member 8 has a substantially circular cross section, a groove 24 is formed in an annular shape along the seal member 8 on the side in the axial direction. The groove 24 engages with the tip of the cylindrical portion 20 and sandwiches the upper and lower surfaces thereof to fix the seal member 8 to the cylindrical portion 20.
[0054]
The sealing member 8 located at the tip of the cylindrical portion 20 faces the cylindrical member 4 and is sandwiched between the leading end surface of the cylindrical member 4 and the leading end surface of the cylindrical portion 20 to exert a sealing function. Since the seal member 8 is engaged and fixed to the tip of the cylindrical portion 20 that slightly protrudes from the side surface of the stator 5, the side plate 1B and 1C constituting the case end are fixed to the cylindrical plate 1A that is the case body. There is no withdrawal.
[0055]
FIG. 12 to FIG. Reference example 2 The modification of the structure method of this cooling jacket is shown. Although each figure shows only the main part which comprises the cooling jacket 10, it has comprised similarly in the cooling jacket 11 side.
[0056]
In the cooling jacket construction method shown in FIG. 12, the shape of the tip for assembling the seal member 8 of the cylindrical portion 20 is projected to the cylindrical member 4 side on the inner peripheral side and the outer diameter is stepped 25 and the small diameter portion 26. The stepped shape is configured. The seal member 8 is disposed in contact with the stepped portion 25 at the tip of the cylindrical portion 20 and fitted into the small diameter portion 26.
[0057]
In the assembled state in which the side plates 1B and 1C are fixed to the cylindrical plate 1A, the seal member 8 is fitted into the small diameter portion 26 of the cylindrical portion 20, and the stepped surface 25 and the distal end surface of the cylindrical member 4 protruding from the side plates 1B and 1C It is compressed and crushed in between to exert a sealing function. The seal member 8 can be constituted by an O-ring having a circular cross section, and it is not necessary to apply fixing means such as adhesion to the cylindrical portion 20, but the reliability with respect to dropping or the like is improved by adhesion.
[0058]
In the configuration method of the cooling jackets 10 and 11 shown in FIG. 13, the shape of the tip to which the seal member 8 of the cylindrical portion 20 is assembled is formed in a concave shape by an annular groove 27 along the tip surface. The seal member 8 is inserted and fixed in an annular groove 27 having a concave shape, and a portion protruding from the groove 27 abuts against the distal end surface of the cylindrical member 4 protruding from the side plates 1B and 1C and is crushed. Demonstrates the sealing function. Since the seal member 8 is fitted in the groove 27, it does not easily come off.
[0059]
In the configuration method of the cooling jackets 10 and 11 shown in FIG. 14, a stepped outer diameter portion having a small diameter portion 26 with an outer diameter sandwiched by a step 25 is provided at the tip of the cylindrical portion 20. The stepped outer diameter portion can be formed by changing a molding die when integrally molded with the resin layer 14. On the other hand, the cylindrical member 4 fixed to the side plates 1B and 1C is configured such that the tip shape thereof is a stepped hole 29 that protrudes toward the stator 5 on the outer peripheral side and has an inner diameter increased by a stepped portion 28. The seal member 8 is disposed so as to be fitted to the small-diameter shaft 26 at the tip of the cylindrical portion 20 and to be in contact with the stepped portion 25.
[0060]
In the assembled state in which the side plates 1B and 1C are fixed to the cylindrical plate 1A, the seal member 8 is fitted to the small diameter shaft 26 of the cylindrical portion 20, and the step at the tip of the cylindrical member 4 protruding from the step 25 and the side plates 1B and 1C. It is compressed and crushed with the appendix 28 to exert a sealing function. The seal member 8 is disposed so as to be surrounded by a stepped portion at each end of the cylindrical portion 20 and the cylindrical member 4 which are stepped shapes facing each other, and there is no deviation in the axial direction or the radial direction. For this reason, the seal member 8 can be constituted by an O-ring having a circular cross section, and it is not necessary to apply fixing means such as adhesion to the cylindrical portion 20, and the reliability with respect to falling off is improved.
[0061]
Reference example 2 In , Listed below With features .
[0062]
(K) Since the sealing member 8 is fixedly arranged at the tip of the cylindrical portion 20, it is located in a deep part of the cylindrical plate 1A as the case body, and the side plates 1B and 1C as the case end members are placed in the cylindrical plate 1A. The possibility that the seal member 8 is detached during the assembly can be reduced.
[0064]
FIG. 15 relates to the configuration of the cooling jackets 10 and 11. Reference example 3 Is shown. The figure shows only the main part constituting the cooling jacket 10, but the cooling jacket 11 side is similarly constructed. Reference example 3 In FIG. 2, the seal member 8 is mounted on both ends of the cylindrical member 4 protruding from the side plates 1B and 1C as the case end member and the cylindrical portion 20 from the inner peripheral portion of the end surface of the stator 5.
[0065]
The seal member 8 attached to the tip of the cylindrical member 4 is fixed by welding rubber. The seal member 8 attached to the tip of the cylindrical portion 20 has a substantially circular cross section, but a groove 24 is formed annularly along the seal member 8 on the side in the axial direction. The groove 24 engages with the tip of the cylindrical portion 20 and sandwiches the upper and lower surfaces thereof to fix the seal member 8 to the cylindrical portion 20.
[0066]
When the side plates 1B and 1C are fixed and assembled to the cylindrical plate 1A of the case body, the seal member 8 at the tip of the cylindrical portion 20 and the seal member 8 at the tip of the cylinder member 4 come into contact with each other, and the cylindrical plate 1A and It is crushed while being elastically deformed according to tightening with the side plates 1B and 1C, and exhibits a sealing effect.
[0067]
FIG. 16 to FIG. Reference example 3 The modification of the structure method of this cooling jacket is shown. Although each figure shows only the main part which comprises the cooling jacket 10, it has comprised similarly in the cooling jacket 11 side.
[0068]
In the configuration method of the cooling jackets 10 and 11 shown in FIG. 16, the cylindrical member 4 is formed in a concave shape by an annular groove 19 along the distal end surface along the distal end surface, and the annular groove 19 having a concave shape is sealed. The member 8 is inserted and fixed. Similarly, a concave shape is formed by an annular groove 30 along the distal end surface at the distal end of the cylindrical portion 20, and the seal member 8 is inserted and fixed in the annular groove 30 having a concave shape. When the side plates 1B and 1C and the cylindrical plate 1A are assembled, the seal members 8 bring the protruding portions from the grooves 19 and 30 at the tips into contact with each other, and according to the tightening between the cylindrical plate 1A and the side plates 1B and 1C. While being elastically deformed, it is crushed and exhibits a sealing effect.
[0069]
In the configuration method of the cooling jackets 10 and 11 shown in FIG. 17, the seal member 8 attached to the cylindrical member 4 in FIG. To form by bonding. At the time of assembling the side plates 1B and 1C and the cylindrical plate 1A, the seal members 8 are in contact with the portions located between the tips of the cylindrical member 4 and the cylindrical portion 20 to tighten the cylindrical plate 1A and the side plates 1B and 1C. Accordingly, the seal member 8 between the tips is crushed while being elastically deformed, and exhibits a sealing effect. Further, since the sealing member 8 extends toward the side plates 1B and 1C, which are case end members, on the outer peripheral side of the cylindrical member 4 and covers the portions of the cylindrical member 4 that come into contact with the cooling jackets 10 and 11, the cylindrical member 4 Even if it is made of a conductive material such as metal, the insulation between the coil 7 and the case 1 is improved.
[0070]
In the configuration method of the cooling jackets 10 and 11 shown in FIG. 18, the seal member 8 to be mounted on the cylindrical portion 20 in FIG. 17 is formed in a concave shape along the distal end surface at the distal end of the cylindrical portion 20 as in FIG. The annular groove 30 is inserted and fixed. Also in this modified example, as in FIG. 17, the sealing member 8 between the tips is crushed while being elastically deformed in accordance with the tightening of the cylindrical plate 1A and the side plates 1B, 1C, and exhibits a sealing effect. Further, since the sealing member 8 extends toward the side plates 1B and 1C, which are case end members, on the outer peripheral side of the cylindrical member 4 and covers the portions of the cylindrical member 4 that come into contact with the cooling jackets 10 and 11, the cylindrical member 4 Even if it is made of a conductive material such as metal, the insulation between the coil 7 and the case 1 is improved.
[0071]
Reference example 3 In , Listed below With features .
[0072]
(G) When the sealing member 8 is disposed at the tip of each of the cylindrical portion 20 and the cylindrical member 4 and the side plates 1B and 1C as the case end members are assembled to the cylindrical plate 1A as the case body, the respective sealing members 8 Is crushed in the axial direction, so that the sealing performance of the cooling jackets 10 and 11 is improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a rotating electrical machine taken along line BB of FIG. 2 showing a first embodiment of the present invention.
2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a partial cross-sectional view showing a modification of the first embodiment.
FIG. 4 is a partial cross-sectional view showing another modification of the first embodiment.
FIG. 5 is a partial cross-sectional view showing still another modification of the first embodiment.
[Fig. 6] Reference example 1 Sectional drawing of the rotary electric machine which shows.
[Fig. 7] Reference example 1 The fragmentary sectional view which shows the modification of this.
[Fig. 8] Reference example 1 The fragmentary sectional view which shows another modification of these.
FIG. 9 Reference example 1 The fragmentary sectional view which shows another modification of these.
FIG. 10 Reference example 1 The fragmentary sectional view which shows another modification of these.
FIG. 11 Reference example 2 The fragmentary sectional view of the rotary electric machine which shows.
FIG. Reference example 2 The fragmentary sectional view which shows the modification of this.
FIG. 13 Reference example 2 The fragmentary sectional view which shows another modification of these.
FIG. 14 Reference example 2 The fragmentary sectional view which shows another modification of these.
FIG. 15 Reference example 3 The fragmentary sectional view of the rotary electric machine which shows.
FIG. 16 Reference example 3 The fragmentary sectional view which shows the modification of this.
FIG. 17 Reference example 3 The fragmentary sectional view which shows another modification of these.
FIG. 18 Reference example 3 The fragmentary sectional view which shows another modification of these.
[Explanation of symbols]
1 case
1A Cylindrical plate as the case body
1B, 1C Side plate as case end member
2 Rotor
3 Bearing
4 cylinder members
5 Stator
6 Stator core
7 Stator coil
8 Seal member
10, 11 Cooling jacket
12, 21, 25, 28 Stepped
13, 26 Small diameter part
14 Resin layer
15 Refrigerant passage
16 Oil supply port
17 Oil outlet
19, 27, 30 groove
20 Cylindrical part
22, 29 Stepped holes

Claims

In a rotating electrical machine that houses a coil in a slot of a stator core, closes an opening of the slot that opens on the inner peripheral surface of the stator, and forms a refrigerant passage inside the slot.
A stator in which circumferential ends of adjacent teeth portion tips are connected with a closing member to close the opening of the slot, and an end surface of the teeth portion and an end surface of the closing member are exposed on the inner peripheral portion of the side surface;
A case body provided with the stator fixed to the inner periphery;
A case end member constituting the casing end assembled to an end portion of the case body,
A cylindrical member provided on the case end member and protruding in the axial direction toward the stator;
A seal member disposed in the circumferential direction so as to abut on the protruding end side end portion of the cylindrical member , the end surface of the teeth portion of the stator, and the end surface of the closing member ;
The cylindrical member connects the case end member and the stator by axially crushing the seal member between the end surface of the teeth portion of the stator and the end surface of the closing member when the case end member is assembled to the case body. A rotating electrical machine comprising an annular cooling jacket defined by a case main body, a case end member, and a stator on the outer peripheral side thereof and communicating with a refrigerant passage.

2. The rotating electrical machine according to claim 1, wherein a tip end of the cylindrical member is configured in a stepped shape having a stepped portion to be a small diameter portion, and the seal member is disposed to be fitted to the small diameter portion.

The tip of the cylindrical member is formed in a concave shape by an annular groove along the distal end surface, and the seal member is disposed with a part inserted in the groove of the cylindrical member. Rotating electric machine.

2. The rotating electrical machine according to claim 1, wherein the seal member extends to a case end member side on an outer peripheral side of the cylindrical member and covers a portion constituting a cooling jacket of the cylindrical member.