JP4004969B2

JP4004969B2 - Rotating electrical iron core

Info

Publication number: JP4004969B2
Application number: JP2003032237A
Authority: JP
Inventors: 裕之秋田; 裕治中原; 晴之米谷
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2003-02-10
Filing date: 2003-02-10
Publication date: 2007-11-07
Anticipated expiration: 2023-02-10
Also published as: JP2004242482A

Description

【０００１】
【発明の属する技術分野】
この発明は、例えば電動機等の回転電機の固定子に適用される積層鉄心に係り、特に複数のコア片を帯状に配列してコア部材を形成し、このコア部材を積層した直列体の積層鉄心を環状に形成する際に突き合わせられる端部の接続構造に関するものである。
【０００２】
【従来の技術】
例えば、複数のコア片を薄肉部を介して連結してコア片を帯状に配列したコア部材をプレス打抜きによって形成し、コア部材を所定枚数積層して直列体の積層鉄心を形成し、この積層鉄心にコイルを巻回した後、コア片を連結する薄肉部を折曲させることによって直列体の積層鉄心を環状にし、コア片同士を突合せ、コア部材の両端を突き合わせて接続する製造方法があるが、この製造方法では、プレス打抜きの加工誤差や打抜き端面の表面粗さ等のためにコア片同士及びコア部材両端の突合せ面に隙間ができ、磁気抵抗が増大し、鉄心の磁気性能を低下させるという問題がある。
【０００３】
この問題に対して、コア片を帯状に配列した第１コア部材及び第２コア部材を形成し、第１コア部材のコア片の一部と第２コア部材のコア片の一部とを重ね合わせるようにした一対のコア部材を所定枚数積層し、第１コア部材のコア片の重ね合わせ部に設けた凸部と第２コア部材のコア片に設けた凹部によって積層方向のコア片同士を連結するとともに、配列方向で隣り合うコア片同士の屈曲を可能にし、両端におけるコア部材が階段状になるようにして、コア片同士及びコア部材両端の突合せ面における磁気抵抗を低減した鉄心の製造方法が開示されている（例えば、特許文献１参照）。
【０００４】
【特許文献１】
特許第３３１６７６２号公報（第３−４頁、図１，図５−６，図２１）
【０００５】
【発明が解決しようとする課題】
従来の回転電機の鉄心は以上のように、コア片同士及びコア部材両端の突合せ面における磁気抵抗を低減しているが、コア片の重ね合わせ部における磁気抵抗と、コア部材両端の突合せ面における磁気抵抗とが異なるために、固定子鉄心内で磁束のアンバランスを生じ、コギングトルクが大きくなるという問題点があった。
【０００６】
この発明は上記のような問題点を解消するためになされたもので、コギングトルクの低減を図ることが可能な回転電機の鉄心を提供することを目的とするものである。
【０００７】
【課題を解決するための手段】
この発明に係る回転電機の鉄心は、複数のティースコア片を環状に配列した第１のコア部材及び第２のコア部材４を交互に積層し、
上記第１のコア部材及び第２のコア部材のティースコア片の配列方向における一端に凸状端面を形成し、他端に上記凸状端面と嵌合する凹状端面を形成し、
上記第１のコア部材のティースコア片に形成した凸状端面及び凹状端面の方向と上記第２のコア部材のティースコア片に形成した凸状端面及び凹状端面の方向とが逆方向になるように配列し、かつ、上記第１のコア部材のティースコア片に形成した凸状端面側の面と、上記第２のコア部材のティースコア片に形成した凸状端面側の面とが重なるようにした鉄心の両端の突合せ部で接続する回転電機の鉄心において、
上記突合せ部の一端に、上記第１のコア部材のティースコア片が突出する複数の突出部と、上記第１のコア部材の突出部間に複数の第１の溝を形成し、
上記突合せ部の他端に、上記第２のコア部材のティースコア片が突出する複数の突出部と、上記第２のコア部材の突出部間に複数の第２の溝を形成し、
上記突出部に、上記溝の底面と対向する端面より突出する突起が形成され、上記溝の底面の上記突起と対向する位置に切り欠きが形成されて、上記突起が、上記溝に上記突出部を挿入する機能を備え、
上記第１のコア部材の突出部を上記第２の溝に挿入するとともに、上記第２のコア部材の突出部を上記第１の溝に挿入することによって、上記第１のコア部材のティースコア片と上記第２のコア部材のティースコア片とが重なるとともに、上記突出部の端面と上記溝の底面とが接するように上記突合せ部を接続したものである。
【０００８】
【発明の実施の形態】
以下、この発明の実施の形態を図に基づいて説明する。
実施の形態１．
図１はこの発明の実施の形態１における回転電機の鉄心の構成を示す正面図、図２及び図３は、図１における回転電機の鉄心の第１のコア部材及び第２のコア部材を示す平面図、図４は、図１における回転電機の鉄心の第１のコア部材及び第２のコア部材両端における突合せ部を拡大して示す平面図、図５は、図４に示した突合せ部の斜視図である。
【０００９】
図１に示すように、回転電機の鉄心１は複数のテイースコア片２を環状に配列して形成される第１及び第２のコア部材３、４を、交互に複数枚積層して構成されている。
【００１０】
第１のコア部材３は、図２に示したように、コイルが巻回される磁極ティース９を有するティースコア片２の、その配列方向における一端に円弧状の凸状端面７が形成され、他端には隣り合うティースコア片２の凸状端面７と嵌合する凹状端面８が形成されるとともに、ティースコア片２の凸状端面の表裏の面に凸状端面の円弧中心に凸部５及び凹部６が形成されている。また、図５に示したように、突合せ部（接合部）１０には、突合せ面３ｃが形成されている。
【００１１】
第２のコア部材４は、図３に示したように、第１のコア部材３のティースコア片２と同様の形状のティースコア片２であり、円弧状の凸状端面７及び凹状端面８の向きが第１のコア部材３とは逆向きに配列され、凸状端面の円弧中心に凸部５及び凹部６が形成されている。また、図５に示したように、突合せ部１０には、第１のコア部材３の突合せ面３ｃとラジアル方向に対して対称形の突合せ面４ｃが形成されている。
【００１２】
凸部５及び凹部６は、第１のコア部材３のティースコア片２と第２のコア部材４のティースコア片２との連結手段である。積層方向の第１のコア部材３のティースコア片２と第２のコア部材４のティースコア片２とは、凸状端面側で重なり合い、連結手段で係合されている。また、連結手段は、隣り合うティースコア片２が、凸状端面７及び凹状端面８の嵌合部で屈曲できるように連結している。
【００１３】
そして、第１のコア部材３及び第２のコア部材４を積層した鉄心１は、連結手段を介して、隣り合うティースコア片２同士を屈曲することによって環状に成形され、突合せ部１０において接続される。
【００１４】
第１のコア部材３及び第２のコア部材４は積層されて、図４及び図５に示したように、両端の突合せ部１０の一端側に、第１のコア部材３それぞれのティースコア片２が突出した突出部１１（第１の突出部）が形成され、突出部１１間に第２のコア部材４が挟まれて溝１３（第１の溝）が形成されている。また、突合せ部１０の他端側に、第２のコア部材４それぞれのティースコア片２が突出した突出部１１（第２の突出部）が形成され、突出部１１間に第１のコア部材３が挟まれて溝１３（第２の溝）が形成されている。
【００１５】
鉄心１を環状にして両端を突き合わせたときに、第１のコア部材３それぞれの突出部１１が第２の溝１３に挿入され、第２のコア部材４それぞれの突出部１１が第１の溝１３に挿入され、第１のコア部材３及び第２のコア部材４それぞれのティースコア片２が突合せ部１０で相互に重なり合うようにしている。
【００１６】
このように、第１のコア部材３及び第２のコア部材４それぞれのティースコア片２が突合せ部１０で相互に重なり合うようにすることによって、突合せ部１０のティースコア片における積層方向の重なり面積を、凸部５及び凹部６（連結手段）を設けた位置におけるティースコア片２の積層方向の重なり面積と同程度にすることができる。
【００１７】
このように突合せ部１０における重なり面積と連結手段における重なり面積とを同程度にし、突合せ部１０における磁気抵抗と連結手段における磁気抵抗とを同程度にすることによって、固定子鉄心内における磁束のアンバランスをなくすようにし、コギングトルクを低減することができる。
【００１８】
図４及び図５に示したように、突出部１１の先端には突起１２が形成されている。突起１２の先端は面打ちするので、塑性変形によって突起１２の面打ち部は端部から突出する。これを逃げるために、溝１３部にある第１のコア部材３及び第２のコア部材４のティースコア片２の突合せ面３ｃ，４ｃに切り欠き３ａ，４ａを設け、突起１２は切り欠き３ａ，４ａと対向する位置に形成する。
【００１９】
突起１２は、面打ちによる塑性変形等によって、先端に向けて漸次薄くなるように傾斜面３ｄ，４ｄが形成されている。突出部１１を溝１３に挿入する際には、突出部１１が反り等によって曲がっているような場合でも、第１のコア部材３及び第２のコア部材４の一方の傾斜面３ｄ，４ｄに突起１２の先端が当接し、傾斜面３ｄ，４ｄに沿ってガイドされ、このガイド機能によって、溝１３への突出部１１の挿入が容易に行われる。
【００２０】
また、面打ち等によって傾斜面３ｄ，４ｄが形成されると傾斜面３ｄ，４ｄで隙間ができ、磁性材料の密度が低くなるので磁気特性が悪くなるが、傾斜面３ｄ，４ｄがわずかな部分であるので、影響は少ない。さらに、磁路長が長くなる外周の方が磁束密度は低いので、図４及び図５に示したように、突起１２をティースコア片２の外周側に設けるのが、磁気特性に及ぼす影響を小さくできるという利点がある。
【００２１】
図６及び図７は、溝１３に突出部１１が挿入される様子を示すものであり、図６は平面図、図７は断面図である。
【００２２】
図６及び図７に示したように、突合せ部１０で突起１２を対向させ（ａ）、突起１２先端の三角形状の尖った部分（一点）が相互に挿入し始め（ｂ）、突起１２先端の尖った部分が相互に傾斜面に沿ってガイドされ、突出部１１は溝１３へ円滑に挿入され（ｃ）、面打によって端部から突出した突起１２の先端は切り欠き３ｂ，４ｂへ逃がされると共に、突出部１１の端面と溝１３底部の端面とが接する（ｄ）。このように、突起１２先端を一点とすることで、突起１２は相互に溝１３に挿入しやすくなり、一点が挿入されれば、あとは全体が挿入されるようになる。
【００２３】
面打ち等によって形成された傾斜面３ｄ，４ｄの向きは、第１及び第２コア部材３，４で同一の向きとすることにより、第１及び第２コア部材３，４の突出部１１に反り等が発生し突起１２の位置が上下方向にずれるような場合、その位置ずれの許容値が広がる。
【００２４】
図８は、第１及び第２コア部材３，４をプレス打抜きによって作製する工程の一部を示す平面図、図９及び図１０は、突起を形成する面打ち工程を説明する平面図（ａ）及びＡ−Ａ断面図である。
【００２５】
図８に示したように、帯状の板を用い、斜線部を打ち抜いてマッチング穴１４及び内径１５を形成し（ａ）、第１及び第２のコア部材３，４用のティースコア（図では１個のみ示しているが２個ある）を形成する（ｂ）。この時のティースコア外周部の打抜き穴形状は、図９に示したように、逃げ穴１６と、この後の工程で形成するスリット１７の外周部に切り欠き３ａ，３ｂ，４ａ，４ｂを有する形状とする。
【００２６】
次に、スリット加工により、一方の向きに凸状端面を有するスリット１７を形成して第１のコア部材３を形成し（ｃ）、他方の向きに凸状端面を有するスリット１７を形成して第２のコア部材４を形成する（ｄ）。この時、スリット１７の１つが突合せ部１０における突合せ面３ｃ，４ｃとなるようにする。
【００２７】
次に、図９に斜線部で示したティースコア２の外周先端部を面打ちする。したがって、面打ちはプレス打抜きと同一の方向（上方から下方）に行うのがよい。面打ちによって、図１０（ｂ）に示したように、先端方向に漸次薄くなる形状になり、図１０（ａ）の斜線部の面積だけ広がった突起１２が形成される。
【００２８】
面打ちによって突起１２は、ティースコア２の外周方向にｙだけ広がるので、突起１２が外周方向に突出しないように、切り欠き３ｂ，４ｂの深さｘは、ｘ＞ｙとする。
【００２９】
次に、ティースコア２の凸状端面７側に連結手段として用いる凹部及び凸部５，６を形成した後（図８（ｅ），（ｆ））、第１及び第２のコア部材３，４を打ち抜く。
【００３０】
なお、本実施の形態において、突合せ面３ｃ，４ｃをプレス打抜き工程で行う例を示したが、別工程としてもよく、また、スリット加工に限るものではない。
【００３１】
また、突合せ面３ｃ，４ｃを半径線に対して対称の位置に形成したが、非対称の位置でもよく、さらに、半径線の位置でもよい。
【００３２】
実施の形態２．
図１１はこの発明の実施の形態２における回転電機の鉄心の構成を示す正面図、図１２は、図１１における回転電機の鉄心の第１のコア部材及び第２のコア部材の突合せ部を拡大して示す平面図、図１３は、図１１における回転電機の鉄心の第１のコア部材及び第２のコア部材を示す平面図、図１４は、図１２に示した突合せ部の断面図である。
【００３３】
上記実施の形態１では、ガイド機能を有する突起１２をティースコア片２の外周より内側に設ける場合を示したが、本実施の形態においては、図１１ないし図１３に示したように、突起１２をティースコア片２の外周よりも外側に設けている。
【００３４】
突起１２は、図１４に示したように、実施の形態１と同様、面打ち等によって先端方向に漸次薄くなる傾斜面３ｄ，４ｄを有する。突起１２は、突出部１１を溝１３に挿入する際に、先端が傾斜面３ｄ，４ｄに沿ってガイドされ、突出部１１が溝１３に容易に挿入されるようにするガイド機能を有する。
【００３５】
突起１２の傾斜面３ｄ，４ｄの向きを同一方向とすることによって、第１及び第２コア部材３，４の突出部１１に反り等が発生し突起１２の位置が上下方向にずれるような場合、その位置ずれの許容値が広がる。
【００３６】
ティースコア片２の磁極ティース９にコイルを巻回し、コイルに電流を流して磁界を発生させた場合、前述のように、磁束密度はティースコア片２の内周側より外周側が小さくなるので、上記実施の形態１ではティースコア片２の外周側に突起を設けて、磁気特性に対する影響が小さくなるようにした。
【００３７】
本実施の形態では、突起１２をティースコア片２の外周より外側に設けたので、磁気特性に及ぼす突起１２の影響を更に小さくすることができる。
【００３８】
なお、上記実施の形態１及び２においては、第１のコア部材３と第２のコア部材４を１枚の板で構成した場合を示したが、図１５の断面図に示すように、第１のコア部材３及び第２のコア部材４をそれぞれ複数枚の板を重ね合わせた構成としてもよい。
【００３９】
この発明に係る回転電機の鉄心は、複数のティースコア片を環状に配列した第１のコア部材及び第２のコア部材４を交互に積層し、
上記第１のコア部材及び第２のコア部材のティースコア片の配列方向における一端に凸状端面を形成し、他端に上記凸状端面と嵌合する凹状端面を形成し、
上記第１のコア部材のティースコア片に形成した凸状端面及び凹状端面の方向と上記第２のコア部材のティースコア片に形成した凸状端面及び凹状端面の方向とが逆方向になるように配列し、かつ、上記第１のコア部材のティースコア片に形成した凸状端面側の面と、上記第２のコア部材のティースコア片に形成した凸状端面側の面とが重なるようにした鉄心の両端の突合せ部で接続する回転電機の鉄心において、
上記突合せ部の一端に、上記第１のコア部材のティースコア片が突出する複数の突出部と、上記第１のコア部材の突出部間に複数の第１の溝を形成し、
上記突合せ部の他端に、上記第２のコア部材のティースコア片が突出する複数の突出部と、上記第２のコア部材の突出部間に複数の第２の溝を形成し、
上記突出部に、上記溝の底面と対向する端面より突出する突起が形成され、上記溝の底面の上記突起と対向する位置に切り欠きが形成されて、上記突起が、上記溝に上記突出部を挿入する機能を備え、
上記第１のコア部材の突出部を上記第２の溝に挿入するとともに、上記第２のコア部材の突出部を上記第１の溝に挿入することによって、上記第１のコア部材のティースコア片と上記第２のコア部材のティースコア片とが重なるとともに、上記突出部の端面と上記溝の底面とが接するように上記突合せ部を接続したものであるので、鉄心の突合せ部におけるティースコア片の積層方向の重なり面積を、第１のコア部材のティースコア片に形成した凸状端面側の面と、第２のコア部材のティースコア片に形成した凸状端面側の面とが重なる重なり面積と同程度にすることができるので、固定子鉄心内における磁束のアンバランスをなくし、コギングトルクを低減することができる。
【図面の簡単な説明】
【図１】この発明の実施の形態１における回転電機の鉄心の構成を示す正面図である。
【図２】図１における回転電機の鉄心の第１のコア部材を示す平面図である。
【図３】図１における回転電機の鉄心の第２のコア部材を示す平面図である。
【図４】図１における回転電機の鉄心の第１のコア部材及び第２のコア部材両端における突合せ部を拡大して示す平面図である。
【図５】図４に示した突合せ部の斜視図である。
【図６】溝に突出部が挿入される様子を示す平面図である。
【図７】溝に突出部が挿入される様子を示す断面図である。
【図８】第１及び第２コア部材をプレス打抜きによって作製する工程の一部を示す平面図である。
【図９】突起を形成する面打ち工程を説明する平面図（ａ）及びＡ−Ａ断面図（ｂ）である。
【図１０】突起を形成する面打ち工程を説明する平面図（ａ）及びＡ−Ａ断面図（ｂ）である。
【図１１】この発明の実施の形態２における回転電機の鉄心の構成を示す正面図である。
【図１２】図１１における回転電機の鉄心の第１のコア部材及び第２のコア部材の突合せ部を拡大して示す平面図である。
【図１３】図１１における回転電機の鉄心の第１のコア部材及び第２のコア部材を示す平面図である。
【図１４】図１２に示した突合せ部の断面図である。
【図１５】この発明の他の実施の形態における突合せ部の断面図である。
【符号の説明】
１鉄心、２テイースコア片、３第１のコア部材、
３ａ，４ａ，３ｂ，４ｂ切り欠き、４第２のコア部材、５凹部、
６凸部、７凸状端面、８凹状端面、９磁極テイース、１０突合せ部、
１１突出部、１２突起、１３溝、１４マーキング、１５内径、
１６逃げ溝、１７スリット加工。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a laminated core applied to a stator of a rotating electric machine such as an electric motor, and more particularly, a core member is formed by arranging a plurality of core pieces in a strip shape, and the core members are laminated in series. It is related with the connection structure of the edge part faced | matched when forming in a ring.
[0002]
[Prior art]
For example, a core member in which a plurality of core pieces are connected through thin portions and the core pieces are arranged in a band shape is formed by press punching, and a predetermined number of core members are laminated to form a laminated iron core in a series body. There is a manufacturing method in which after a coil is wound around an iron core, a thin laminated portion connecting the core pieces is bent so that the laminated cores of the serial body are annular, the core pieces are butted together, and both ends of the core member are butted together. However, this manufacturing method creates gaps between the core pieces and the abutting surfaces at both ends of the core member due to press punching errors and surface roughness of the punched end surface, increasing the magnetic resistance and lowering the magnetic performance of the iron core. There is a problem of making it.
[0003]
To solve this problem, a first core member and a second core member in which core pieces are arranged in a strip shape are formed, and a part of the core piece of the first core member and a part of the core piece of the second core member are overlapped. A predetermined number of the paired core members are laminated, and the core pieces in the stacking direction are formed by the convex portions provided in the overlapping portions of the core pieces of the first core member and the concave portions provided in the core pieces of the second core member. Manufacture of an iron core that is connected and enables bending between adjacent core pieces in the arrangement direction so that the core members at both ends are stepped to reduce the magnetic resistance between the core pieces and the abutting surfaces at both ends of the core member. A method is disclosed (for example, see Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent No. 3316762 (page 3-4, FIG. 1, FIG. 5-6, FIG. 21)
[0005]
[Problems to be solved by the invention]
As described above, the iron core of a conventional rotating electric machine reduces the magnetic resistance at the abutting surfaces between the core pieces and at both ends of the core member. However, the magnetic resistance at the overlapping portion of the core pieces and the abutting surfaces at both ends of the core member are reduced. Since the magnetic resistance is different, there is a problem that the magnetic flux is unbalanced in the stator core and the cogging torque is increased.
[0006]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an iron core of a rotating electrical machine capable of reducing cogging torque.
[0007]
[Means for Solving the Problems]
The iron core of the rotating electrical machine according to the present invention alternately stacks the first core member and the second core member 4 in which a plurality of tea score pieces are arranged in an annular shape,
Forming a convex end surface at one end in the arrangement direction of the tea score pieces of the first core member and the second core member, and forming a concave end surface fitted to the convex end surface at the other end;
The direction of the convex end surface and the concave end surface formed on the teascore piece of the first core member is opposite to the direction of the convex end surface and the concave end surface formed on the tea core piece of the second core member. And the surface on the convex end surface side formed on the teascore piece of the first core member and the surface on the convex end surface side formed on the teascore piece of the second core member overlap. In the iron core of a rotating electrical machine that is connected at the butt end of both ends of the iron core,
A plurality of protrusions from which the tea score pieces of the first core member protrude at one end of the butting part, and a plurality of first grooves between the protrusions of the first core member,
On the other end of the butting portion, a plurality of protruding portions from which the tea score pieces of the second core member protrude, and a plurality of second grooves between the protruding portions of the second core member,
The protrusion is formed with a protrusion protruding from the end surface facing the bottom surface of the groove, a notch is formed at a position facing the protrusion on the bottom surface of the groove, and the protrusion is formed in the groove with the protrusion. With the ability to insert
By inserting the protruding portion of the first core member into the second groove and inserting the protruding portion of the second core member into the first groove, the tea score of the first core member The butt portion is connected so that the piece and the tea score piece of the second core member overlap , and the end surface of the protruding portion and the bottom surface of the groove are in contact with each other.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a front view showing a configuration of an iron core of a rotating electric machine according to Embodiment 1 of the present invention, and FIGS. 2 and 3 show a first core member and a second core member of the iron core of the rotating electric machine in FIG. 4 is an enlarged plan view showing the abutting portions at both ends of the first core member and the second core member of the iron core of the rotating electrical machine in FIG. 1, and FIG. 5 is a plan view of the abutting portion shown in FIG. It is a perspective view.
[0009]
As shown in FIG. 1, an iron core 1 of a rotating electrical machine is formed by alternately laminating a plurality of first and second core members 3, 4 formed by arranging a plurality of tee score pieces 2 in an annular shape. ing.
[0010]
As shown in FIG. 2, the first core member 3 has an arc-shaped convex end surface 7 formed at one end in the arrangement direction of the tea score piece 2 having the magnetic teeth 9 around which the coil is wound, The other end is formed with a concave end surface 8 that fits with the convex end surface 7 of the adjacent tea score piece 2, and a convex portion at the center of the arc of the convex end surface on the front and back surfaces of the convex end surface of the tea score piece 2. 5 and a recess 6 are formed. Further, as shown in FIG. 5, a butt surface 3 c is formed in the butt portion (joint portion) 10.
[0011]
As shown in FIG. 3, the second core member 4 is a tea score piece 2 having the same shape as the tea score piece 2 of the first core member 3, and has an arcuate convex end face 7 and a concave end face 8. Are arranged opposite to the first core member 3, and a convex portion 5 and a concave portion 6 are formed at the center of the arc of the convex end surface. Further, as shown in FIG. 5, the butting portion 10 is formed with a butting surface 4 c that is symmetrical with respect to the butting surface 3 c of the first core member 3 and the radial direction.
[0012]
The convex part 5 and the concave part 6 are connecting means for the tea score piece 2 of the first core member 3 and the tea score piece 2 of the second core member 4. The tea score piece 2 of the first core member 3 in the stacking direction and the tea score piece 2 of the second core member 4 overlap on the convex end face side and are engaged by the connecting means. Further, the connecting means connects the adjacent tea score pieces 2 so that they can be bent at the fitting portions of the convex end surface 7 and the concave end surface 8.
[0013]
And the iron core 1 which laminated | stacked the 1st core member 3 and the 2nd core member 4 is shape | molded by bending the adjacent tea score pieces 2 via a connection means, and it connects in the butt | matching part 10 Is done.
[0014]
As shown in FIGS. 4 and 5, the first core member 3 and the second core member 4 are laminated, and as shown in FIG. 4 and FIG. A protrusion 11 (first protrusion) protruding 2 is formed, and the second core member 4 is sandwiched between the protrusions 11 to form a groove 13 (first groove). Further, a protruding portion 11 (second protruding portion) is formed on the other end side of the butting portion 10 so that the tea score pieces 2 of the second core member 4 protrude, and the first core member is interposed between the protruding portions 11. 3 is sandwiched to form a groove 13 (second groove).
[0015]
When the core 1 is annular and both ends are butted, the projections 11 of the first core members 3 are inserted into the second grooves 13, and the projections 11 of the second core members 4 are the first grooves. 13, and the tea score pieces 2 of the first core member 3 and the second core member 4 are overlapped with each other at the butting portion 10.
[0016]
Thus, by making the tea score pieces 2 of the first core member 3 and the second core member 4 overlap each other at the butting portion 10, the overlapping area in the stacking direction of the tea score pieces of the butting portion 10 is as follows. Can be made substantially the same as the overlapping area in the stacking direction of the tea score pieces 2 at the positions where the convex portions 5 and the concave portions 6 (connecting means) are provided.
[0017]
Thus, by making the overlapping area in the butting portion 10 and the overlapping area in the connecting means approximately the same, and making the magnetic resistance in the butting portion 10 and the magnetic resistance in the connecting means approximately equal, the unwinding of the magnetic flux in the stator core. The balance can be eliminated and the cogging torque can be reduced.
[0018]
As shown in FIGS. 4 and 5, a protrusion 12 is formed at the tip of the protrusion 11. Since the tip end of the protrusion 12 is faced, the surface beveled part of the protrusion 12 protrudes from the end part by plastic deformation. In order to escape this, notches 3a and 4a are provided in the abutting surfaces 3c and 4c of the tea core pieces 2 of the first core member 3 and the second core member 4 in the groove 13, and the protrusion 12 is notched 3a. , 4a.
[0019]
The protrusion 12 is formed with inclined surfaces 3d and 4d so as to become gradually thinner toward the tip by plastic deformation or the like due to surface hitting. When the protruding portion 11 is inserted into the groove 13, even if the protruding portion 11 is bent due to warpage or the like, the inclined surfaces 3 d and 4 d of the first core member 3 and the second core member 4 are formed on one of the inclined surfaces 3 d and 4 d. The tip of the projection 12 abuts and is guided along the inclined surfaces 3d and 4d, and the projection 11 is easily inserted into the groove 13 by this guide function.
[0020]
In addition, when the inclined surfaces 3d and 4d are formed by surface strike or the like, gaps are formed in the inclined surfaces 3d and 4d, and the magnetic material is reduced in density. Therefore, there is little influence. Furthermore, since the magnetic flux density is lower at the outer periphery where the magnetic path length is longer, as shown in FIGS. 4 and 5, the effect of the protrusions 12 provided on the outer periphery side of the tea score piece 2 on the magnetic characteristics. There is an advantage that it can be made small.
[0021]
6 and 7 show a state in which the protrusion 11 is inserted into the groove 13, FIG. 6 is a plan view, and FIG. 7 is a cross-sectional view.
[0022]
As shown in FIG. 6 and FIG. 7, the protrusion 12 is opposed to the abutting portion 10 (a), and the triangular pointed portion (one point) of the tip of the protrusion 12 starts to be inserted into each other (b). The protruding portions 11 are smoothly inserted into the grooves 13 (c), and the tips of the protrusions 12 protruding from the end portions by the surface hitting are notched into the notches 3b and 4b. At the same time, the end surface of the protrusion 11 and the end surface of the bottom of the groove 13 are in contact with each other (d). In this way, by setting the tip of the protrusion 12 as one point, the protrusions 12 can be easily inserted into the groove 13, and if one point is inserted, the whole is inserted thereafter.
[0023]
The directions of the inclined surfaces 3d and 4d formed by the surface hitting or the like are the same in the first and second core members 3 and 4, so that the protrusions 11 of the first and second core members 3 and 4 are aligned with each other. When warpage or the like occurs and the position of the protrusion 12 is shifted in the vertical direction, the allowable value of the positional deviation is widened.
[0024]
FIG. 8 is a plan view showing a part of a process for producing the first and second core members 3 and 4 by press punching, and FIGS. 9 and 10 are plan views for explaining a surface placing process for forming protrusions (a). And AA sectional view.
[0025]
As shown in FIG. 8, a strip-shaped plate is used, the hatched portion is punched to form the matching hole 14 and the inner diameter 15 (a), and the tee scores for the first and second core members 3 and 4 (in the figure) (Only one is shown but there are two) (b). As shown in FIG. 9, the shape of the punched hole on the outer periphery of the tee score at this time has notches 3a, 3b, 4a and 4b on the outer periphery of the clearance hole 16 and the slit 17 formed in the subsequent process. Shape.
[0026]
Next, a slit 17 having a convex end face in one direction is formed by slit processing to form the first core member 3 (c), and a slit 17 having a convex end face in the other direction is formed. The second core member 4 is formed (d). At this time, one of the slits 17 is made to be the butting surfaces 3c and 4c in the butting portion 10.
[0027]
Next, the outer peripheral tip portion of the tea score 2 indicated by the hatched portion in FIG. 9 is faced. Therefore, surface punching is preferably performed in the same direction as press punching (from top to bottom). As shown in FIG. 10 (b), the protrusions 12 are formed so as to gradually become thinner in the direction of the tip and are spread by the area of the hatched portion in FIG. 10 (a).
[0028]
Since the protrusion 12 spreads by y in the outer peripheral direction of the tea score 2 by the surface hitting, the depth x of the notches 3b and 4b is set to x> y so that the protrusion 12 does not protrude in the outer peripheral direction.
[0029]
Next, after forming concave portions and convex portions 5 and 6 used as connecting means on the convex end surface 7 side of the tea score 2 (FIGS. 8E and 8F), the first and second core members 3 and 3 are formed. 4 is punched out.
[0030]
In the present embodiment, an example in which the butt surfaces 3c and 4c are performed by a press punching process is shown, but it may be a separate process and is not limited to slit processing.
[0031]
In addition, the abutting surfaces 3c and 4c are formed at symmetrical positions with respect to the radial line, but they may be asymmetrical positions and further may be radial line positions.
[0032]
Embodiment 2. FIG.
FIG. 11 is a front view showing the configuration of the iron core of the rotating electrical machine according to Embodiment 2 of the present invention, and FIG. 12 is an enlarged view of the butted portion of the first core member and the second core member of the iron core of the rotating electric machine in FIG. FIG. 13 is a plan view showing the first core member and the second core member of the iron core of the rotating electrical machine in FIG. 11, and FIG. 14 is a cross-sectional view of the butt portion shown in FIG. .
[0033]
In the first embodiment, the case where the protrusion 12 having the guide function is provided on the inner side of the outer periphery of the tea score piece 2 is shown. However, in the present embodiment, as shown in FIGS. Is provided outside the outer periphery of the tea score piece 2.
[0034]
As shown in FIG. 14, the protrusion 12 has inclined surfaces 3 d and 4 d that become gradually thinner in the tip direction by surface hitting or the like, as in the first embodiment. The protrusion 12 has a guide function such that when the protrusion 11 is inserted into the groove 13, the tip is guided along the inclined surfaces 3 d and 4 d, and the protrusion 11 is easily inserted into the groove 13.
[0035]
When the directions of the inclined surfaces 3d and 4d of the protrusion 12 are the same direction, the protrusions 11 of the first and second core members 3 and 4 are warped and the position of the protrusion 12 is shifted in the vertical direction. , The allowable value of the misalignment widens.
[0036]
When a coil is wound around the magnetic teeth 9 of the tea score piece 2 and a magnetic field is generated by passing a current through the coil, the magnetic flux density is smaller on the outer peripheral side than on the inner peripheral side of the tea score piece 2 as described above. In the first embodiment, protrusions are provided on the outer peripheral side of the tea score piece 2 so that the influence on the magnetic properties is reduced.
[0037]
In the present embodiment, since the protrusion 12 is provided outside the outer periphery of the tea score piece 2, the influence of the protrusion 12 on the magnetic characteristics can be further reduced.
[0038]
In the first and second embodiments, the case where the first core member 3 and the second core member 4 are configured by one plate is shown. However, as shown in the sectional view of FIG. The one core member 3 and the second core member 4 may be configured by overlapping a plurality of plates.
[0039]
The iron core of the rotating electrical machine according to the present invention alternately stacks the first core member and the second core member 4 in which a plurality of tea score pieces are arranged in an annular shape,
Forming a convex end surface at one end in the arrangement direction of the tea score pieces of the first core member and the second core member, and forming a concave end surface fitted to the convex end surface at the other end;
The direction of the convex end surface and the concave end surface formed on the teascore piece of the first core member is opposite to the direction of the convex end surface and the concave end surface formed on the tea core piece of the second core member. And the surface on the convex end surface side formed on the teascore piece of the first core member and the surface on the convex end surface side formed on the teascore piece of the second core member overlap. In the iron core of a rotating electrical machine that is connected at the butt end of both ends of the iron core,
A plurality of protrusions from which the tea score pieces of the first core member protrude at one end of the butting part, and a plurality of first grooves between the protrusions of the first core member,
On the other end of the butting portion, a plurality of protruding portions from which the tea score pieces of the second core member protrude, and a plurality of second grooves between the protruding portions of the second core member,
The protrusion is formed with a protrusion protruding from the end surface facing the bottom surface of the groove, a notch is formed at a position facing the protrusion on the bottom surface of the groove, and the protrusion is formed in the groove with the protrusion. With the ability to insert
By inserting the protruding portion of the first core member into the second groove and inserting the protruding portion of the second core member into the first groove, the tea score of the first core member Since the piece and the tee score piece of the second core member overlap and the butt portion is connected so that the end surface of the protruding portion and the bottom surface of the groove are in contact, the tee score at the butt portion of the iron core The overlapping area in the stacking direction of the pieces overlaps the convex end face side surface formed on the tea core piece of the first core member and the convex end face side surface formed on the tea core piece of the second core member. Since it can be made to be almost the same as the overlapping area, the magnetic flux unbalance in the stator core can be eliminated, and the cogging torque can be reduced.
[Brief description of the drawings]
FIG. 1 is a front view showing a configuration of an iron core of a rotary electric machine according to Embodiment 1 of the present invention.
2 is a plan view showing a first core member of the iron core of the rotating electric machine in FIG. 1. FIG.
3 is a plan view showing a second core member of the iron core of the rotating electrical machine in FIG. 1. FIG.
4 is an enlarged plan view showing butted portions at both ends of a first core member and a second core member of the iron core of the rotating electrical machine in FIG. 1. FIG.
FIG. 5 is a perspective view of a butt portion shown in FIG. 4;
FIG. 6 is a plan view showing a state in which a protrusion is inserted into a groove.
FIG. 7 is a cross-sectional view showing a state in which a protrusion is inserted into a groove.
FIG. 8 is a plan view showing a part of a process for producing the first and second core members by press punching.
FIGS. 9A and 9B are a plan view and a cross-sectional view taken along a line AA for explaining a chamfering process for forming protrusions; FIGS.
FIGS. 10A and 10B are a plan view and a cross-sectional view taken along line AA for explaining a chamfering process for forming protrusions; FIGS.
FIG. 11 is a front view showing a configuration of an iron core of a rotary electric machine according to Embodiment 2 of the present invention.
12 is an enlarged plan view showing an abutting portion of the first core member and the second core member of the iron core of the rotating electrical machine in FIG. 11. FIG.
13 is a plan view showing a first core member and a second core member of the iron core of the rotating electrical machine in FIG. 11. FIG.
14 is a cross-sectional view of a butt portion shown in FIG.
FIG. 15 is a cross-sectional view of a butting portion according to another embodiment of the present invention.
[Explanation of symbols]
1 iron core, 2 tee score pieces, 3 first core member,
3a, 4a, 3b, 4b notch, 4 second core member, 5 recess,
6 convex portions, 7 convex end surfaces, 8 concave end surfaces, 9 magnetic pole teeth, 10 butt portions,
11 Projection, 12 Projection, 13 Groove, 14 Marking, 15 Inner Diameter,
16 relief groove, 17 slit processing.

Claims

複数のティースコア片を環状に配列した第１のコア部材及び第２のコア部材を交互に積層し、
上記第１のコア部材及び第２のコア部材のティースコア片の配列方向における一端に凸状端面を形成し、他端に上記凸状端面と嵌合する凹状端面を形成し、
上記第１のコア部材のティースコア片に形成した凸状端面及び凹状端面の方向と上記第２のコア部材のティースコア片に形成した凸状端面及び凹状端面の方向とが逆方向になるように配列し、かつ、上記第１のコア部材のティースコア片に形成した凸状端面側の面と、上記第２のコア部材のティースコア片に形成した凸状端面側の面とが重なるようにした鉄心の両端の突合せ部で接続する回転電機の鉄心において、
上記突合せ部の一端に、上記第１のコア部材のティースコア片が突出する複数の突出部と、上記第１のコア部材の突出部間に複数の第１の溝を形成し、
上記突合せ部の他端に、上記第２のコア部材のティースコア片が突出する複数の突出部と、上記第２のコア部材の突出部間に複数の第２の溝を形成し、
上記突出部に、上記溝の底面と対向する端面より突出する突起が形成され、上記溝の底面の上記突起と対向する位置に切り欠きが形成されて、上記突起が、上記溝に上記突出部を挿入する機能を備え、
上記第１のコア部材の突出部を上記第２の溝に挿入するとともに、上記第２のコア部材の突出部を上記第１の溝に挿入することによって、上記第１のコア部材のティースコア片と上記第２のコア部材のティースコア片とが重なるとともに、上記突出部の端面と上記溝の底面とが接するように上記突合せ部を接続したことを特徴とする回転電機の鉄心。The first core member and the second core member in which a plurality of tea score pieces are arranged in an annular shape are alternately laminated,
Forming a convex end surface at one end in the arrangement direction of the tea score pieces of the first core member and the second core member, and forming a concave end surface fitted to the convex end surface at the other end;
The direction of the convex end surface and the concave end surface formed on the teascore piece of the first core member is opposite to the direction of the convex end surface and the concave end surface formed on the tea core piece of the second core member. And the surface on the convex end surface side formed on the teascore piece of the first core member and the surface on the convex end surface side formed on the teascore piece of the second core member overlap. In the iron core of a rotating electrical machine that is connected at the butt end of both ends of the iron core,
A plurality of protrusions from which the tea score pieces of the first core member protrude at one end of the butting part, and a plurality of first grooves between the protrusions of the first core member,
On the other end of the butting portion, a plurality of protruding portions from which the tea score pieces of the second core member protrude, and a plurality of second grooves between the protruding portions of the second core member,
The protrusion is formed with a protrusion protruding from the end surface facing the bottom surface of the groove, a notch is formed at a position facing the protrusion on the bottom surface of the groove, and the protrusion is formed in the groove with the protrusion. With the ability to insert
By inserting the protruding portion of the first core member into the second groove and inserting the protruding portion of the second core member into the first groove, the tea score of the first core member An iron core of a rotating electrical machine characterized in that the butt portion is connected so that the piece and the tea score piece of the second core member overlap and the end surface of the protruding portion and the bottom surface of the groove are in contact with each other.

上記突起は先端に向かって漸次薄くなる傾斜面が形成されていることを特徴とする請求項１記載の回転電機の鉄心。 2. The iron core of a rotating electrical machine according to claim 1, wherein the protrusion has an inclined surface that becomes gradually thinner toward the tip .

上記突起は、面打ちにより薄く形成されていることを特徴とする請求項１記載の回転電機の鉄心。 2. The iron core of a rotating electrical machine according to claim 1 , wherein the protrusion is thinly formed by chamfering.

上記突起は、上記ティースコア片の外周側に設けられたことを特徴とする請求項１記載の回転電機の鉄心。 The iron core of a rotating electrical machine according to claim 1 , wherein the protrusion is provided on an outer peripheral side of the tea score piece .

上記突起は、上記ティースコア片の外周側に設けられ、面打ちにより寸法ｙだけ広がるように薄く形成され、上記切り欠きは、上記ティースコア片の外周側からの切り欠き深さｘを、ｘ＞ｙとなるように形成し、上記突起が上記ティースコア片の外周から突出しないようにされていることを特徴とする請求項１記載の回転電機の鉄心。 The protrusion is provided on the outer peripheral side of the tea score piece and is thinly formed so as to expand by a dimension y by face hitting. The notch has a notch depth x from the outer peripheral side of the tea score piece, x The iron core of a rotating electrical machine according to claim 1 , wherein the iron core is formed so as to satisfy> y, and the protrusion does not protrude from the outer periphery of the tea score piece .

上記突起は、上記ティースコア片の外周より外側に設けられたことを特徴とする請求項１記載の回転電機の鉄心。 2. The iron core for a rotating electrical machine according to claim 1 , wherein the protrusion is provided outside the outer periphery of the tea score piece .

上記突起は、先端が尖った形状であることを特徴とする請求項１記載の回転電機の鉄心。 2. The iron core of a rotating electrical machine according to claim 1 , wherein the protrusion has a pointed tip .

上記鉄心の両端において上記第１のコア部材のティースコア片と上記第２のコア部材のティースコア片とが重なる面積が、上記凸状端面側の面が重なる面積と略同一であることを特徴とする請求項１ないし７のいずれかに記載の回転電機の鉄心。 The area where the tea score piece of the first core member and the tea score piece of the second core member overlap at both ends of the iron core is substantially the same as the area where the surface on the convex end face side overlaps. An iron core of a rotating electrical machine according to any one of claims 1 to 7 .

上記突出部における上記第１のコア部材のティースコア片と上記第２のコア部材のティースコア片との重なり数が、上記凸状端面側の面における上記第１のコア部材のティースコア片と上記第２のコア部材のティースコア片との重なり数と略同一であることを特徴とする請求項１ないし７のいずれかに記載の回転電機の鉄心。 The number of overlaps between the tea core piece of the first core member and the tea core piece of the second core member in the protruding portion is the tea score piece of the first core member on the surface on the convex end surface side. The iron core of a rotating electrical machine according to any one of claims 1 to 7, wherein the number of overlaps with the tea score pieces of the second core member is substantially the same .

上記傾斜面は積層方向に対して同一方向を向いていることを特徴とする請求項２記載の回転電機の鉄心。 The iron core of a rotating electrical machine according to claim 2, wherein the inclined surface faces the same direction with respect to the stacking direction .