JP3711111B2

JP3711111B2 - Linear motor

Info

Publication number: JP3711111B2
Application number: JP2003014192A
Authority: JP
Inventors: 裕治中原; 裕之秋田; 真人海野; 正哉井上
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2003-01-23
Filing date: 2003-01-23
Publication date: 2005-10-26
Anticipated expiration: 2019-03-11
Also published as: JP2003204667A

Description

【０００１】
【発明の属する技術分野】
この発明は、リニアモータに係り、特にコイルが巻回される側の固定子または可動子の構造に関するものである。
【０００２】
【従来の技術】
この種従来のリニアモータは、図１６に示すように所定のピッチでスロット１ａが形成された櫛歯状の鉄板を、多数枚積層してなる鉄心１にコイル２を装着して形成される固定子３と、この固定子３に対向し空隙を介して移動可能に設けられた可動子４とで構成されているが、図から明らかなようにスロット１ａの上側開口部が広いので、コイル２によって進行磁界が発生されると、この進行磁界がピッチと等しい周期で振幅変調され、リニアモータの推力を打ち消す方向の力が発生して出力が低下するという問題が生じる。
このため、図１７に示すようにスロット１ａの上側開口部に突出部１ｂを設けた複数の鉄板を積層して固定子３を形成し、この突出部１ｂによりスロット１ａの上側開口部を狭くして効果的に対処することも知られている。
【０００３】
しかしながら、このようにスロット１ａの上側開口部に突出部１ｂを設けると、スロット１ａの上側開口部が狭くなるので、コイル２を巻回したり嵌め込む作業が著しく困難になるという問題を生じる。
そこで、例えば特開平６−１６５４６９号公報等では、図１８に示すように鉄心５の各歯５ａの先端両側に、切り欠き部５ｂを介して枝部５ｃをそれぞれ形成し、スロット５ｄにコイル６を巻回または嵌め込んだ後、図１９に示すように切り欠き部５ｂを折り曲げて各歯５ａの先端間を狭くすることが提案されている。
【０００４】
【発明が解決しようとする課題】
従来のリニアモータは以上のように構成され、スロット５ｄにコイル６を巻回または嵌め込んだ後、切り欠き部を折り曲げて各歯５ａの先端間を狭くすることにより、コイル６を巻回または嵌め込む作業を比較的容易にするとともに、出力が低下するという問題を解決している。
しかしながら、コイル６の巻回または嵌め込み時には、スロット５ｄの上側開口部が広くなっているとはいうものの、スロット５ｄの幅より広くなることはないので、コイル６を直巻きする場合にスロット５ｄ内に巻線ノズル（図示せず）の通り道を確保する必要があるため、その分コイル６の巻線密度が低くなり、所定の容量を得るためには大形化し、又、予めボビン等にコイル６を巻回したものをスロット５ｄ内に嵌め込むようにすれば、スロット５ｄ内に巻線ノズルの通り道を確保する必要もなくなるため巻線密度を上げることは出来るが、各コイル６間を接続するための部品点数やその作業が増加してコストが増大する等の問題点があった。
【０００５】
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、コイルの巻線密度を下げることなく直巻きができるようにして、小形化ならびにコストの低減が可能なリニアモータを提供することを目的とするものである。
【０００６】
【課題を解決するための手段】
この発明に係るリニアモータは、固定子または可動子の一方に適用されるものであって、磁極テイースを有する複数のコア片を帯状に配列してなるコア部材を積層してなる積層ヨーク部材と、上記積層ヨーク部材の上記磁極テイースに巻回されるコイル部材とを備え、
上記コア部材は第１のコア部材及び第２のコア部材を重ね合わせてなり、
上記コア片は、配列方向の一端に凸状端面を有し他端に凹状端面を有し、上記第１のコア部材及び第２のコア部材それぞれの隣り合うコア片の上記凸状端面と上記凹状端面とが嵌合し、
上記第１のコア部材及び第２のコア部材は、上記第１のコア部材の凸状端面の向きと上記第２のコア部材の凸状端面の向きが逆方向になるように、かつ、上記第１のコア部材のコア片の凸状端面側の面と上記第２のコア部材の凸状端面側の面とが重なるようにし、
上記コア片の凸状端面側の面に、上記隣り合うコア片が上記凸状端面と上記凹状端面との嵌合部で屈曲可能とするとともに、積層方向の上記コア片を連結する連結手段を設けているものである。
【０００７】
【発明の実施の形態】
実施の形態１．
以下、この発明の実施の形態を図に基づいて説明する。図１はこの発明の実施の形態１におけるリニアモータの構成を示す断面図、図２は図１における積層ヨーク部材のコア片間を連結する連結手段の構成を示し、（Ａ）は平面図、（Ｂ）は（Ａ）における線Ａ−Ａに沿った断面を示す断面図、図３は図１における固定子の構成を示す平面図、図４は図３における固定子のコイルの巻線方法を説明するための図、図５および図６はこの発明の実施の形態１におけるリニアモータの要部の構成が図１におけるとはそれぞれ異なる構成を示す断面図である。
【０００８】
図において、７は磁性材料でなる板状のコア片で、一端側裏面に連結手段としての凹部７ａおよび凸部７ｂが形成されるとともに、その凸状端面７ｃはこれら凹部７ａおよび凸部７ｂの中心を中心とした円弧状に形成され、他端側には相隣なるコア片７の凸状端面７ｃと嵌合可能な凹状端面７ｄが形成されており、中央部から外方に磁極テイース８がそれぞれ突設されている。９は複数のコア片７が各凸状端面７ｃ、凹状端面７ｄを介して配列された第１のコア部材である。
【０００９】
１０は各コア片７が第１のコア部材９とは長手方向に互い違いに配列され、第１のコア部材９と共に積層ヨーク部材１１を構成する第２のコア部材で、第１のコア部材９と交互に積層され積層方向に相隣なるコア片７同士の凹部７ａおよび凸部７ｂが嵌合されることにより回転自在に連結されているとともに、図２から明らかなように、第１のコア部材９の凸状端面７ｃ側面と破線で示す第２のコア部材１０の凸状端面７ｄとが重なっており、この重なりによって磁気抵抗が低減される。なお、最上層となるコア片７には凸部７ｂが嵌合可能な穴部７ｅが形成されている。１２は各磁極テイース８に絶縁ボビン１３を介して巻回されたコイル、１４は積層ヨーク部材１１を固定側に保持する保持部材で、これら７ないし１４で固定子１５を構成している。１６は固定子１５の各磁極テイース８の先端と所定の間隙、すなわちエアギャップを介して配設され、固定子１５と対向する側に所定のピッチで複数の永久磁石１７が取り付けられた可動子、１８はノズル１９を介してコイル１２を巻回する巻線機、２０は駆動軸２１により回転駆動される巻線治具である。
【００１０】
次に、上記のように構成された実施の形態１におけるリニアモータの製造方法について説明する。
まず、第１および第２のコア部材９、１０をプレス打ち抜きにより交互に打ち抜いて金型内で順次積層し、各コア片７の積層方向で相対向する凹部７ａおよび凸部７ｂ同士が嵌合されるとともに、抜きかしめがなされて一体化され図２（Ａ）に示すように積層ヨーク部材１１が構成される。そして、この積層ヨーク部材１１の各磁極テイース８に絶縁ボビン１３をそれぞれ装着する。
【００１１】
次に、図４に示すようにこの積層ヨーク部材１１を、駆動軸２１により回転駆動される巻線治具２０に装着する。すると、巻線治具２０に装着された各コア片７同士は連結手段としての凹部７ａおよび凸部７ｂの回転により屈曲し、各磁極テイース８はその先端が放射状に拡開される。次いで、このように各磁極テイース８の先端が拡開された状態で、巻線機１８によりノズル１９を介して各磁極テイース８に巻線が行われコイル１２が形成される。
【００１２】
すると、駆動軸２１の回転により巻線治具２０が駆動され、次の新しいコア片７が順次巻線治具２０に装着され、再び巻線が行われてコイル１２が形成される。以下同様の動作が繰り返されて図３に示すような状態に組み立てられた後、積層ヨーク部材１１の各コア片７側を保持部材１４で保持固定して固定子１５が構成され、各磁極テイース８の先端側にエアギャップを介して可動子１６を配置することによりリニアモータが完成する。
そして、各コイル１２を励磁することにより発生する進行磁界によって可動子１６に推力が発生し、この推力によって可動子１６に搭載された被搬送物が搬送される。
【００１３】
このように上記実施の形態１によれば、連結手段としての凹部７ａおよび凸部７ｂを回転させて各コア片７間を屈曲させ、各磁極テイース８を放射状に拡開した状態で巻線を行いコイル１２を形成するようにしているので、直巻きとしてもノズル１９の通り道を確保する必要など無くなり、巻線密度を十分に上げることができるため、小形化ならびにコストの低減が可能となる。又、巻線後に屈曲された各コア片７間を元に戻し正常な状態にしているので、図５に示すように各磁極テイース８の先端間の開口幅を狭くすることができ、場合によっては図６に示すように各磁極テイース８の先端同士を当接させて開口幅を無くすこともできるため、可動子１６の動きを滑らかにすることが可能となる。
【００１４】
実施の形態２．
図７はこの発明の実施の形態２におけるリニアモータの固定子の構成を示す断面図、図８はこの発明の実施の形態２におけるリニアモータの固定子の図７に示すとは異なる構成を示す断面図である。
図において、上記実施の形態１におけると同様な部分は同一符号を付して説明を省略する。
【００１５】
２２は磁性材料でなり後述の保持部材と対応する側にそれぞれアリ溝２２ａが形成された複数のコア片で、連結手段としての薄肉部２３を介して屈曲可能に連結されている。２４は各コア片２２から外方に突出して形成される磁極テイース、２５はこれら２２ないし２４で形成されるコア部材で、所定の枚数が積層され例えば抜きかしめ等によって一体化されることにより積層ヨーク部材２６を構成している。そして、積層ヨーク部材２６の各磁極テイース２４には絶縁ボビン１３を介してコイル１２がそれぞれ巻回されている。２７は各コア片２２のアリ溝２２ａと対応する位置に、アリ溝２２ａと嵌合可能な複数の突起２７ａが形成された保持部材で、各突起２７ａをアリ溝２２ａと嵌合させることにより、積層ヨーク部材２６を保持固定し固定子２８を構成している。
【００１６】
このように上記実施の形態２によれば、連結手段としての薄肉部２３を折曲させて各コア片２２間を屈曲できるようにしているので、上記実施の形態１におけると同様に、各磁極テイース２４を放射状に拡開した状態で巻線を行いコイル１２を形成することができるため、巻線密度を十分に上げ小形化ならびにコストの低減が可能であることは勿論のこと、保持部材２７の突起２７ａをコア片２２のアリ溝２２ａに嵌合させて積層ヨーク部材２６を固定保持しているので、機械的強度を向上させることが可能となる。
【００１７】
なお、図７における構成では、コア片２２側にアリ溝２２ａを、保持部材２７側に突起２７ａをそれぞれ形成した場合について説明したが、図８に示すようにコア片２２側に突起２２ｂを、保持部材２７側にアリ溝２７ｂをそれぞれ形成するようにしても良く上記と同様の効果を発揮し得ることは言うまでもない。
【００１８】
実施の形態３．
図９はこの発明の実施の形態３におけるリニアモータの固定子の構成を示す断面図である。
図において、上記実施の形態２におけると同様な部分は同一符号を付して説明を省略する。２９は例えばポリブチレンテレフタレートのような熱可塑性樹脂や、エポキシ樹脂のような熱硬化性樹脂等の樹脂により形成された保持部材で、この樹脂は保持部材２９の形成時に各磁極テイース２４に巻回されたコイル１２近傍に存在する隙間にも埋め込まれ、コイル１２および積層ヨーク部材２６と共に一体にモールド成形されている。
【００１９】
このように上記実施の形態３によれば、保持部材２９を形成する樹脂でコイル１２および積層ヨーク部材２６を一体にモールド成形しているので、組立作業性および機械的強度の向上を図ることが可能になる。
【００２０】
実施の形態４．
図１０はこの発明の実施の形態４におけるリニアモータの固定子の要部の構成を示す断面図、図１１は図１０におけるリニアモータの固定子の要部の構成を示す背面図、図１２はこの発明の実施の形態４におけるリニアモータの固定子と可動子の配置関係を示す平面図である。
図において、上記各実施の形態１ないし３におけると同様な部分は同一符号を付して説明を省略する。
【００２１】
３０は磁性材料でなる板状のコア片で、一端に突出部３０ａおよび他端に隣接するコア片３０の突出部３０ａと回転可能に嵌合することにより関節形状を形成する窪み部３０ｂが設けられている。３１は各コア片３０から外方に突出して形成される磁極テイースで、絶縁ボビン１３を介してコイル１２がそれぞれ巻回されている。３２は各コア片３０を各突出部３０ａおよび窪み部３０ｂを嵌合させることにより所定の枚数連結して形成されるコア部材、３３はこのコア部材３２を所定の数だけ積層し、例えば抜きかしめ等により一体化して形成される積層ヨーク部材であり、図１１に示すように各突出部３０ａ、窪み部３０ｂの各嵌合部を所定量ずつ摺動させることにより、各コア片３０をコア部材３２の積層方向に順次ずらして配置し、保持部材（図示せず）により固定保持して固定子３４が構成される。
【００２２】
このように上記実施の形態４によれば、各突出部３０ａおよび窪み部３０ｂの各嵌合部を所定量ずつ摺動させることにより、各コア片３０をコア部材３２の積層方向に順次ずらして配置するようにしているので、例えば図１２に示すように、可動子３５に対して固定子３４を所定の角度αだけ傾けて配置することにより、容易にスキューを与えることができ、コギングの発生を効果的に抑制することが可能になる。
【００２３】
実施の形態５．
図１３はこの発明の実施の形態５におけるリニアモータの固定子の要部の構成を示す断面図、図１４は図１３におけるリニアモータの固定子の要部の構成を示す背面図、図１５はこの発明の実施の形態５におけるリニアモータの固定子と可動子の配置関係を示す平面図である。
図において、上記各実施の形態１ないし４におけると同様な部分は同一符号を付して説明を省略する。
【００２４】
３６は磁性材料でなり所定の枚数積層された板状のコア片で、最上、下層の両コア片３６は連結手段としての薄肉部３６ａを介して屈曲可能に連結されており、図１４に示すように最上、下層の両コア片３６の各薄肉部３６ａを積層方向に折曲させることにより、各コア片３６を積層方向に順次ずらして配置し、保持部材（図示せず）により固定保持して固定子３７が構成される。
【００２５】
このように上記実施の形態５によれば、最上、下層の両コア片３６の各薄肉部３６ａを積層方向に折曲させることにより、各コア片３６を積層方向に順次ずらして配置するようにしているので、例えば図１５に示すように、上記実施の形態４におけると同様に可動子３５に対して固定子３７を所定の角度αだけ傾けて配置することにより、容易にスキューを与えることができ、コギングの発生を効果的に抑制することが可能になる。
【００２６】
なお、上記各実施の形態１ないし５においては、固定子側に巻線が施された構成について説明したが、これに限定されるものではなく可動子側に巻線が施された構成のものに適用しても、上記とそれぞれ同様の効果を発揮し得ることは言うまでもない。
【００２７】
【発明の効果】
以上のように、この発明に係るリニアモータによれば、固定子または可動子の一方に適用されるものであって、磁極テイースを有する複数のコア片を帯状に配列してなるコア部材を積層してなる積層ヨーク部材と、上記積層ヨーク部材の上記磁極テイースに巻回されるコイル部材とを備え、
上記コア部材は第１のコア部材及び第２のコア部材を重ね合わせてなり、
上記コア片は、配列方向の一端に凸状端面を有し他端に凹状端面を有し、上記第１のコア部材及び第２のコア部材それぞれの隣り合うコア片の上記凸状端面と上記凹状端面とが嵌合し、
上記第１のコア部材及び第２のコア部材は、上記第１のコア部材の凸状端面の向きと上記第２のコア部材の凸状端面の向きが逆方向になるように、かつ、上記第１のコア部材のコア片の凸状端面側の面と上記第２のコア部材の凸状端面側の面とが重なるようにし、
上記コア片の凸状端面側の面に、上記隣り合うコア片が上記凸状端面と上記凹状端面との嵌合部で屈曲可能とするとともに、積層方向の上記コア片を連結する連結手段を設けているものであるので、コイルの巻線密度を下げることなく直巻きができるようにして、小形化ならびにコストの低減が可能なリニアモータを提供することができるとともに、配列したコア片間の磁気抵抗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におけるリニアモータの構成を示す断面図である。
【図２】図１における積層ヨーク部材のコア片間を連結する連結手段の構成を示し、（Ａ）は平面図、（Ｂ）は（Ａ）における線Ａ−Ａに沿った断面を示す断面図である。
【図３】図１における固定子の構成を示す平面図である。
【図４】図３における固定子のコイルの巻線方法を説明するための図である。
【図５】この発明の実施の形態１におけるリニアモータの要部の図１に示すとは異なる構成を示す断面図である。
【図６】この発明の実施の形態１におけるリニアモータの要部の図１に示すとはさらに異なる構成を示す断面図である。
【図７】この発明の実施の形態２におけるリニアモータの固定子の構成を示す断面図である。
【図８】この発明の実施の形態２におけるリニアモータの固定子の図７に示すとは異なる構成を示す断面図である。
【図９】この発明の実施の形態３におけるリニアモータの固定子の構成を示す断面図である。
【図１０】この発明の実施の形態４におけるリニアモータの固定子の要部の構成を示す断面図である。
【図１１】図１０におけるリニアモータの固定子の要部の構成を示す背面図である。
【図１２】この発明の実施の形態４におけるリニアモータの固定子と可動子の配置関係を示す平面図である。
【図１３】この発明の実施の形態５におけるリニアモータの固定子の要部の構成を示す断面図である。
【図１４】図１３におけるリニアモータの固定子の要部の構成を示す背面図である。
【図１５】この発明の実施の形態５におけるリニアモータの固定子と可動子の配置関係を示す平面図である。
【図１６】従来のリニアモータの構成を示す断面図である。
【図１７】従来のリニアモータの固定子の鉄心の図１６に示すとは異なる構成を示す平面図である。
【図１８】従来のリニアモータの固定子の鉄心の図１６に示すとはさらに異なる構成を示す平面図である。
【図１９】図１８に示す固定子の鉄心が用いられたリニアモータの構成を示す断面図である。
【符号の説明】
７，２２，３０，３６コア片、７ａ凹部、７ｂ凸部、
７ｃ凸状端面、７ｄ凹状端面、２２ａ，２７ｂアリ溝、
２２ｂ，２７ａ突起、３０ａ突出部、３０ｂ窪み部、３６ａ薄肉部、
８，２４，３１磁極テイース、９第１のコア部材、１０第２のコア部材、
１１，２６，３３積層ヨーク部材、１２コイル、１３絶縁ボビン、
１４，２７，２９保持部材、１５，２８，３４，３７固定子、
１６，３５可動子、１８巻線機、１９ノズル、２０巻線治具、
２３，３６ａ薄肉部、２５，３２コア部材。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a linear motor, and more particularly to a structure of a stator or a mover on a side around which a coil is wound.
[0002]
[Prior art]
As shown in FIG. 16, this type of conventional linear motor is formed by attaching a coil 2 to an iron core 1 formed by laminating a large number of comb-like iron plates having slots 1a formed at a predetermined pitch. Although it is composed of a child 3 and a movable member 4 which faces the stator 3 and is movable through a gap, the upper opening of the slot 1a is wide as apparent from the figure. When the traveling magnetic field is generated by this, the traveling magnetic field is amplitude-modulated with a period equal to the pitch, and there is a problem that a force in a direction to cancel the thrust of the linear motor is generated and the output is reduced.
For this reason, as shown in FIG. 17, the stator 3 is formed by laminating a plurality of iron plates provided with protrusions 1b in the upper opening of the slot 1a, and the upper opening of the slot 1a is narrowed by the protrusion 1b. It is also known to deal effectively.
[0003]
However, if the protrusion 1b is provided in the upper opening of the slot 1a in this way, the upper opening of the slot 1a becomes narrow, so that there is a problem that the operation of winding or fitting the coil 2 becomes extremely difficult.
Therefore, for example, in JP-A-6-165469, etc., as shown in FIG. 18, branch portions 5c are formed on both ends of the teeth 5a of the iron core 5 via notches 5b, and the coil 6 is formed in the slot 5d. After winding or fitting, as shown in FIG. 19, it is proposed to bend the notch 5b to narrow the space between the tips of the teeth 5a.
[0004]
[Problems to be solved by the invention]
The conventional linear motor is configured as described above. After winding or fitting the coil 6 in the slot 5d, the notch is bent to narrow the gap between the tips of the teeth 5a. It solves the problem that the fitting operation is relatively easy and the output is reduced.
However, when the coil 6 is wound or fitted, the upper opening of the slot 5d is widened, but it is not wider than the width of the slot 5d. Therefore, when the coil 6 is wound directly, Since it is necessary to secure a path for the winding nozzle (not shown), the winding density of the coil 6 is reduced accordingly, and the coil 6 is enlarged to obtain a predetermined capacity. If the coil 6 is inserted into the slot 5d, it is not necessary to secure a path for the winding nozzle in the slot 5d, so that the winding density can be increased, but the coils 6 are connected. There are problems such as an increase in the number of parts and the work for increasing the cost.
[0005]
The present invention has been made to solve the above-described problems, and provides a linear motor that can be reduced in size and cost by enabling direct winding without lowering the winding density of the coil. It is for the purpose.
[0006]
[Means for Solving the Problems]
A linear motor according to the present invention is applied to one of a stator and a mover, and a laminated yoke member formed by laminating core members formed by arranging a plurality of core pieces having magnetic pole teeth in a strip shape. A coil member wound around the magnetic pole teeth of the laminated yoke member,
The core member is formed by overlapping the first core member and the second core member,
The core piece has a convex end face at one end in the arrangement direction and a concave end face at the other end, and the convex end face of the adjacent core piece of each of the first core member and the second core member, and the above The concave end face is fitted,
The first core member and the second core member are arranged so that the direction of the convex end surface of the first core member is opposite to the direction of the convex end surface of the second core member, and The surface on the convex end face side of the core piece of the first core member and the surface on the convex end face side of the second core member overlap,
A connecting means for connecting the core pieces in the stacking direction to the surface on the convex end face side of the core pieces, wherein the adjacent core pieces can be bent at a fitting portion between the convex end face and the concave end face. It is provided.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
Embodiments of the present invention will be described below with reference to the drawings. 1 is a cross-sectional view showing a configuration of a linear motor according to Embodiment 1 of the present invention, FIG. 2 shows a configuration of connecting means for connecting the core pieces of the laminated yoke member in FIG. 1, (A) is a plan view, (B) is a sectional view showing a section along line AA in (A), FIG. 3 is a plan view showing the configuration of the stator in FIG. 1, and FIG. 4 is a winding method of the stator coil in FIG. FIGS. 5 and 6 are cross-sectional views showing configurations of main parts of the linear motor according to Embodiment 1 of the present invention, which are different from those in FIG.
[0008]
In the figure, reference numeral 7 denotes a plate-like core piece made of a magnetic material. A concave portion 7a and a convex portion 7b as connecting means are formed on the back surface on one end side. A concave end surface 7d that can be fitted to the convex end surface 7c of the adjacent core piece 7 is formed on the other end side, and the magnetic pole teeth 8 are formed outward from the central portion. Are projected. Reference numeral 9 denotes a first core member in which a plurality of core pieces 7 are arranged via respective convex end surfaces 7c and concave end surfaces 7d.
[0009]
Reference numeral 10 denotes a second core member in which the core pieces 7 are alternately arranged in the longitudinal direction with respect to the first core member 9 and constitutes the laminated yoke member 11 together with the first core member 9. As shown in FIG. 2, the first cores are alternately connected to each other so that the concave portions 7 a and the convex portions 7 b of the core pieces 7 adjacent to each other in the laminating direction are fitted together. The side surface of the convex end surface 7c of the member 9 and the convex end surface 7d of the second core member 10 indicated by a broken line overlap each other, and the magnetic resistance is reduced by this overlap. The core piece 7 which is the uppermost layer is formed with a hole portion 7e into which the convex portion 7b can be fitted. Reference numeral 12 denotes a coil wound around each magnetic pole tooth 8 via an insulating bobbin 13, and reference numeral 14 denotes a holding member for holding the laminated yoke member 11 on the fixed side, and these 7 to 14 constitute a stator 15. Reference numeral 16 denotes a mover in which a plurality of permanent magnets 17 are mounted at a predetermined pitch on the side facing the stator 15 and arranged at a predetermined gap, that is, an air gap, from the tip of each magnetic pole tooth 8 of the stator 15. , 18 is a winding machine that winds the coil 12 through a nozzle 19, and 20 is a winding jig that is rotationally driven by a drive shaft 21.
[0010]
Next, the manufacturing method of the linear motor in Embodiment 1 comprised as mentioned above is demonstrated.
First, the first and second core members 9 and 10 are alternately punched by press punching and sequentially stacked in the mold, and the concave portions 7a and the convex portions 7b facing each other in the stacking direction of the core pieces 7 are fitted to each other. At the same time, the laminated yoke member 11 is constructed as shown in FIG. Then, the insulating bobbins 13 are respectively attached to the magnetic pole teeth 8 of the laminated yoke member 11.
[0011]
Next, as shown in FIG. 4, the laminated yoke member 11 is mounted on a winding jig 20 that is rotationally driven by a drive shaft 21. Then, the core pieces 7 mounted on the winding jig 20 are bent by the rotation of the concave portions 7a and the convex portions 7b as connecting means, and the tips of the magnetic pole teeth 8 are radially expanded. Next, in the state where the tips of the magnetic pole teeth 8 are expanded as described above, the winding machine 18 performs winding on the magnetic pole teeth 8 via the nozzles 19 to form the coils 12.
[0012]
Then, the winding jig 20 is driven by the rotation of the drive shaft 21, the next new core pieces 7 are sequentially attached to the winding jig 20, and the winding is performed again to form the coil 12. Thereafter, the same operation is repeated and assembled in a state as shown in FIG. 3, and then each core piece 7 side of the laminated yoke member 11 is held and fixed by the holding member 14 to form the stator 15. A linear motor is completed by disposing the mover 16 on the front end side of the 8 via an air gap.
Then, a thrust is generated in the mover 16 by a traveling magnetic field generated by exciting each coil 12, and the object to be transported mounted on the mover 16 is transported by this thrust.
[0013]
As described above, according to the first embodiment, the concave portions 7a and the convex portions 7b as connecting means are rotated to bend between the core pieces 7 and the magnetic pole teeth 8 are radially expanded so that the windings are wound. Since the coil 12 is formed, there is no need to ensure the passage of the nozzle 19 even when the coil is directly wound, and the winding density can be sufficiently increased. Therefore, the size can be reduced and the cost can be reduced. In addition, since each core piece 7 bent after winding is restored to the normal state, the opening width between the tips of the magnetic pole teeth 8 can be reduced as shown in FIG. As shown in FIG. 6, since the opening width can be eliminated by bringing the tips of the magnetic pole teeth 8 into contact with each other, the movement of the mover 16 can be made smooth.
[0014]
Embodiment 2. FIG.
7 is a cross-sectional view showing the configuration of the stator of the linear motor according to the second embodiment of the present invention, and FIG. 8 shows a configuration different from that shown in FIG. 7 of the stator of the linear motor according to the second embodiment of the present invention. It is sectional drawing.
In the figure, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
[0015]
Reference numeral 22 denotes a plurality of core pieces which are made of a magnetic material and each have a dovetail groove 22a formed on a side corresponding to a holding member which will be described later, and are connected so as to be bendable through thin portions 23 as connecting means. Reference numeral 24 denotes a magnetic pole tee projecting outward from each core piece 22, and reference numeral 25 denotes a core member formed of these 22 to 24. A predetermined number of sheets are stacked and integrated by, for example, staking or the like. A yoke member 26 is configured. The coils 12 are wound around the magnetic pole teeth 24 of the laminated yoke member 26 via the insulating bobbins 13. 27 is a holding member in which a plurality of protrusions 27a that can be fitted to the dovetail groove 22a are formed at positions corresponding to the dovetail grooves 22a of each core piece 22, and by fitting each protrusion 27a with the dovetail groove 22a, The laminated yoke member 26 is held and fixed to constitute a stator 28.
[0016]
As described above, according to the second embodiment, the thin-walled portion 23 as the connecting means is bent so that the core pieces 22 can be bent. Since the coil 12 can be formed by winding the tee 24 in a radially expanded state, the winding density can be sufficiently increased to reduce the size and the cost. The protrusion 27a is fitted into the dovetail groove 22a of the core piece 22 to fix and hold the laminated yoke member 26, so that the mechanical strength can be improved.
[0017]
In the configuration in FIG. 7, the dovetail groove 22 a is formed on the core piece 22 side and the protrusion 27 a is formed on the holding member 27 side. However, as shown in FIG. 8, the protrusion 22 b is formed on the core piece 22 side. It goes without saying that the dovetail grooves 27b may be formed on the holding member 27 side, respectively, and the same effects as described above can be exhibited.
[0018]
Embodiment 3 FIG.
FIG. 9 is a cross-sectional view showing the configuration of the stator of the linear motor according to Embodiment 3 of the present invention.
In the figure, the same parts as those in the second embodiment are denoted by the same reference numerals, and the description thereof is omitted. Reference numeral 29 denotes a holding member formed of a resin such as a thermoplastic resin such as polybutylene terephthalate or a thermosetting resin such as an epoxy resin. This resin is wound around the magnetic pole teeth 24 when the holding member 29 is formed. The coil 12 is embedded in a gap existing in the vicinity of the coil 12, and is molded together with the coil 12 and the laminated yoke member 26.
[0019]
As described above, according to the third embodiment, since the coil 12 and the laminated yoke member 26 are integrally molded with the resin forming the holding member 29, the assembly workability and the mechanical strength can be improved. It becomes possible.
[0020]
Embodiment 4 FIG.
10 is a cross-sectional view showing the configuration of the main part of the stator of the linear motor according to Embodiment 4 of the present invention, FIG. 11 is a rear view showing the configuration of the main part of the stator of the linear motor in FIG. 10, and FIG. It is a top view which shows the arrangement | positioning relationship of the stator and mover of a linear motor in Embodiment 4 of this invention.
In the figure, the same parts as those in the first to third embodiments are denoted by the same reference numerals, and the description thereof is omitted.
[0021]
Reference numeral 30 denotes a plate-like core piece made of a magnetic material, which is provided with a recess 30b that forms a joint shape by being rotatably fitted with a protrusion 30a at one end and the protrusion 30a of the core piece 30 adjacent to the other end. It has been. 31 is a magnetic pole tee formed to protrude outward from each core piece 30, and the coil 12 is wound around the insulating bobbin 13. 32 is a core member formed by connecting a predetermined number of core pieces 30 by fitting each protrusion 30a and recess 30b, and 33 is a predetermined number of the core members 32 stacked, for example by caulking. 11 is a laminated yoke member formed integrally with each other, and as shown in FIG. 11, each core piece 30 is made to be a core member by sliding each fitting portion of each protrusion 30a and recess 30b by a predetermined amount. The stator 34 is configured by sequentially shifting in the stacking direction of 32 and fixedly held by a holding member (not shown).
[0022]
As described above, according to the fourth embodiment, the core pieces 30 are sequentially shifted in the stacking direction of the core members 32 by sliding the fitting portions of the protrusions 30a and the recesses 30b by a predetermined amount. As shown in FIG. 12, for example, as shown in FIG. 12, by placing the stator 34 at a predetermined angle α with respect to the mover 35, it is possible to easily give a skew and to generate cogging. Can be effectively suppressed.
[0023]
Embodiment 5 FIG.
13 is a cross-sectional view showing the configuration of the main part of the stator of the linear motor according to Embodiment 5 of the present invention, FIG. 14 is a rear view showing the configuration of the main part of the stator of the linear motor in FIG. It is a top view which shows the arrangement | positioning relationship of the stator and mover of a linear motor in Embodiment 5 of this invention.
In the figure, the same parts as those in the first to fourth embodiments are denoted by the same reference numerals, and the description thereof is omitted.
[0024]
Reference numeral 36 denotes a plate-like core piece made of a magnetic material and laminated in a predetermined number. The uppermost and lowermost core pieces 36 are connected so as to be bendable through thin portions 36a as connecting means, as shown in FIG. In this way, by bending the thin portions 36a of the upper and lower core pieces 36 in the stacking direction, the core pieces 36 are sequentially shifted in the stacking direction and fixed and held by a holding member (not shown). Thus, the stator 37 is configured.
[0025]
As described above, according to the fifth embodiment, the respective core pieces 36 are sequentially shifted in the stacking direction by bending the thin portions 36a of the uppermost and lowermost core pieces 36 in the stacking direction. Therefore, for example, as shown in FIG. 15, the skew can be easily given by arranging the stator 37 at a predetermined angle α with respect to the mover 35 as in the fourth embodiment. And the occurrence of cogging can be effectively suppressed.
[0026]
In each of the first to fifth embodiments, the configuration in which the winding is provided on the stator side has been described. However, the configuration is not limited to this, and the configuration in which the winding is provided on the mover side is described. It goes without saying that even if applied to the above, the same effects as described above can be exhibited.
[0027]
【The invention's effect】
As described above, according to the linear motor according to the present invention, the core member is applied to one of the stator and the mover, and is formed by stacking the core members formed by arranging a plurality of core pieces having magnetic pole teeth. A laminated yoke member, and a coil member wound around the magnetic pole teeth of the laminated yoke member,
The core member is formed by overlapping the first core member and the second core member,
The core piece has a convex end face at one end in the arrangement direction and a concave end face at the other end, and the convex end face of the adjacent core piece of each of the first core member and the second core member, and the above The concave end face is fitted,
The first core member and the second core member are arranged such that the direction of the convex end surface of the first core member is opposite to the direction of the convex end surface of the second core member, and The surface on the convex end face side of the core piece of the first core member and the surface on the convex end face side of the second core member overlap,
A connecting means for connecting the core pieces in the stacking direction to the surface on the convex end face side of the core pieces, wherein the adjacent core pieces can be bent at a fitting portion between the convex end face and the concave end face. Therefore, it is possible to provide a linear motor that can be reduced in size and reduced in cost by enabling direct winding without reducing the winding density of the coil, and between the arranged core pieces. Magnetic resistance can be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration of a linear motor according to Embodiment 1 of the present invention.
2 shows a configuration of a connecting means for connecting the core pieces of the laminated yoke member in FIG. 1, (A) is a plan view, and (B) is a cross section showing a cross section along line AA in (A). FIG.
FIG. 3 is a plan view showing a configuration of a stator in FIG. 1;
4 is a diagram for explaining a winding method of a stator coil in FIG. 3; FIG.
FIG. 5 is a cross-sectional view showing a configuration different from that shown in FIG. 1 of the main part of the linear motor according to Embodiment 1 of the present invention.
FIG. 6 is a cross-sectional view showing a further different configuration from that shown in FIG. 1 of the main part of the linear motor according to the first embodiment of the present invention.
FIG. 7 is a cross sectional view showing a configuration of a stator of a linear motor according to Embodiment 2 of the present invention.
FIG. 8 is a cross-sectional view showing a configuration different from that shown in FIG. 7 of the stator of the linear motor according to the second embodiment of the present invention.
FIG. 9 is a sectional view showing a configuration of a stator of a linear motor according to Embodiment 3 of the present invention.
FIG. 10 is a cross-sectional view showing a configuration of a main part of a stator of a linear motor according to Embodiment 4 of the present invention.
11 is a rear view showing the configuration of the main part of the stator of the linear motor in FIG.
FIG. 12 is a plan view showing the positional relationship between a stator and a mover of a linear motor according to Embodiment 4 of the present invention.
FIG. 13 is a cross sectional view showing a configuration of a main part of a stator of a linear motor according to a fifth embodiment of the present invention.
14 is a rear view showing the configuration of the main part of the stator of the linear motor in FIG. 13. FIG.
FIG. 15 is a plan view showing a positional relationship between a stator and a mover of a linear motor according to Embodiment 5 of the present invention.
FIG. 16 is a cross-sectional view showing a configuration of a conventional linear motor.
FIG. 17 is a plan view showing a configuration different from that shown in FIG. 16 of the iron core of the stator of the conventional linear motor.
18 is a plan view showing a further different configuration from that shown in FIG. 16 of the iron core of the stator of the conventional linear motor.
19 is a cross-sectional view showing a configuration of a linear motor using the stator iron core shown in FIG. 18;
[Explanation of symbols]
7, 22, 30, 36 core piece, 7a concave portion, 7b convex portion,
7c Convex end face, 7d Concave end face, 22a, 27b Dovetail groove,
22b, 27a protrusion, 30a protrusion, 30b recess, 36a thin-walled part,
8, 24, 31 magnetic pole teeth, 9 first core member, 10 second core member,
11, 26, 33 Laminated yoke members, 12 coils, 13 insulating bobbins,
14, 27, 29 holding member, 15, 28, 34, 37 stator,
16, 35 mover, 18 winding machine, 19 nozzle, 20 winding jig,
23, 36a Thin portion, 25, 32 core member.

Claims

A laminated yoke member that is applied to one of the stator and the movable element and is formed by laminating a core member in which a plurality of core pieces having magnetic pole teeth are arranged in a strip shape, and the magnetic pole of the laminated yoke member A coil member wound around the tee,
The core member is formed by overlapping the first core member and the second core member,
The core piece has a convex end face at one end in the arrangement direction and a concave end face at the other end, and the convex end face of the adjacent core piece of each of the first core member and the second core member, and the above The concave end face is fitted,
The first core member and the second core member are arranged so that the direction of the convex end surface of the first core member is opposite to the direction of the convex end surface of the second core member, and The surface on the convex end face side of the core piece of the first core member and the surface on the convex end face side of the second core member overlap,
A connecting means for connecting the core pieces in the stacking direction to the surface on the convex end face side of the core pieces, wherein the adjacent core pieces can be bent at a fitting portion between the convex end face and the concave end face. A linear motor characterized by being provided.

2. The linear motor according to claim 1, wherein a dovetail groove or a protrusion that can be fitted into the dovetail groove is formed on a side of the core member different from the magnetic pole teeth.