JP3820169B2

JP3820169B2 - Linear motor and manufacturing method thereof

Info

Publication number: JP3820169B2
Application number: JP2002077668A
Authority: JP
Inventors: 昭橋本; 康樹木村; 正哉井上; 明度會; 興起仲
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2002-03-20
Filing date: 2002-03-20
Publication date: 2006-09-13
Anticipated expiration: 2022-03-20
Also published as: JP2003284314A

Description

【０００１】
【発明の属する技術分野】
この発明は、特に工作機械のテーブル送り等に利用されるリニアモータおよびその製造方法に関するものである。
【０００２】
【従来の技術】
図７は例えば特開２０００−２１７３３４号公報等に開示されるこの種従来のリニアモータの構成を示す断面図である。
図において、１は固定子ヨーク２上に交互に極性の異なる複数の永久磁石３ａ、３ｂが、所定の間隔を介して配置される固定子、４はこの固定子１に沿って所定の間隙を介して移動する可動子である。
【０００３】
そして、この可動子４は、可動子ヨーク５、この可動子ヨーク５の固定子１と対向する側の面に、ボルトネジ６を介して所定の間隔を介して保持される断面台形状の結合部材７、断面略Ｔ字状に形成され、一端中央部に形成されたアリ溝８ａを介して結合部材７にそれぞれ結合されるとともに、両側に凹、凸部８ｂ、８ｃを有する複数の第１の磁極テイース部材８、断面略Ｉ字状に形成され、両側に有する凹、凸部９ａ、９ｂが第１の磁極テイース部材８の各凹、凸部８ｂ、８ｃに嵌合することにより、各第１の磁極テイース部材８間に嵌挿される複数の第２の磁極テイース部材９、これら両磁極テイース部材８、９にそれぞれ巻回されるコイル１０、およびこれら両磁極テイース部材８、９の周囲を取り囲むように配設され、これらを固着一体化するモールド樹脂１１により構成されている。
【０００４】
従来のリニアモータは上記のように構成され、可動子４の組立は、まず、第１および第２の磁極テイース部材８、９にそれぞれコイル１０を巻回する。次いで、各第１の磁極テイース部材８のアリ溝８ａを、ボルトネジ６を介して可動子ヨーク５に保持される結合部材７に嵌合して摺動させ、所定の位置でボルトネジ６を締め付けることにより可動子ヨーク５上にそれぞれ固定する。次いで、第２の磁極テイース部材９の凹、凸部９ａ、９ｂを第１の磁極テイース部材８の凹、凸部８ｂ、８ｃにそれぞれ嵌合して摺動させることにより、各第１の磁極テイース部材８間に各第２の磁極テイース部材９をそれぞれ嵌挿する。そして最後に、これら両磁極テイース部材８、９およびコイル１０の周囲を、モールド樹脂１１で取り囲み固着一体化することにより行われている。
【０００５】
【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、結合部材７によって可動子ヨーク５上に保持された第１の磁極テイース部材８間に、第２の磁極テイース部材９を摺動させて嵌挿することにより構成されているので、両磁極テイース部材８、９にそれぞれ巻回されたコイル１０同士が、第２の磁極テイース部材９が摺動する際に接触して擦り合わされるので、絶縁不良や断線を生じる恐れがあり、信頼性が低下す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、信頼性の向上を図ることが可能なリニアモータおよびその製造方法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】
この発明の請求項１に係るリニアモータは、固定子ヨーク上に交互に極性が異なる複数の永久磁石が所定の間隔を介して配置された固定子と、永久磁石と対向して配置された可動子ヨークの対向面に、永久磁石の配置方向に所定の間隔を介し突出して形成された複数の磁極テイース、および各磁極テイースの周囲をそれぞれ取り囲むように配設されるコイルでなる可動子とを備えたリニアモータにおいて、磁極テイースは配置方向に２分割されるとともにいずれか一方が可動子ヨークから突出方向に着脱可能に形成されたものである。
【０００８】
又、この発明の請求項２に係るリニアモータは、請求項１において、磁極テイースを、可動子ヨークと一体に形成された第１の磁極テイース部材と、可動子ヨークの第１の磁極テイース部材の根元に沿って形成される溝部に、根元部が嵌合して保持されるとともに第１の磁極テイース部材と分割面同士が当接された第２の磁極テイース部材とで構成したものである。
【０００９】
又、この発明の請求項３に係るリニアモータは、請求項２において、第２の磁極テイース部材を、延在方向に複数に分割したものである。
【００１０】
又、この発明の請求項４に係るリニアモータは、請求項２において、可動子ヨークの第１の磁極テイース部材の根元に沿って形成される溝部の近傍に、溝部に沿って第２の溝部を形成することにより溝部の側壁が第２の溝部側へ可撓性を有して変形可能としたものである。
【００１１】
又、この発明の請求項５に係るリニアモータの製造方法は、巻回されたコイルを第１の磁極テイース部材を取り囲むように配置し、コイルの内周面の一側を第１の磁極テイース部材の分割面とは異なる側の他面に当接させる工程と、第１の磁極テイース部材の分割面とコイルの内周面の他側との間に第２の磁極テイース部材を挿入し、根元部を溝部に嵌合させる工程とを少なくとも包含したものである。
【００１２】
【発明の実施の形態】
以下、この発明の各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におけるリニアモータの構成を示す断面図、図２は図１におけるリニアモータの組立の工程を示す断面図、図３は図１におけるリニアモータの可動子の構成を一部を展開して示す斜視図、図４は第１の磁極テイース部材とコイルの寸法関係を示す断面図である。
【００１３】
図において、２１は板状の固定子ヨーク２２上に、交互に極性の異なる複数の永久磁石２３、２４が所定の間隔を介して配置された固定子、２５はこの固定子２１と所定の間隙（図中ｇで示す）を介して配置され、図中矢印Ａで示す方向に移動可能な可動子で、可動子ヨーク２６、この可動子ヨーク２６の固定子２１と対向する側の面に、移動方向に所定の間隔を介し突出して形成され、一側に分割面２７ａを有する複数の第１の磁極テイース部材２７、可動子ヨーク２６の第１の磁極テイース部材２７の根元に沿って形成される溝部２８に、根元部２９ａが嵌合して保持され一側の分割面２９ｂが、第１の磁極テイース部材２７の分割面２７ａと当接された第２の磁極テイース部材２９、および第１および第２の磁極テイース部材２７、２９をそれぞれ取り囲むように配設されたコイル３０で構成されている。
【００１４】
次に、上記のように構成されるこの発明の実施の形態１におけるリニアモータの可動子２５の組立の工程を図２に基づいて説明する。
まず、図２（Ａ）に示すようにコイル３０を、可動子２５の第１の磁極テイース部材２７に図中矢印Ａで示す方向に移動させて挿入する。次いで、順次上記のようにコイル３０を第１の磁極テイース部材２７に挿入して図２（Ｂ）に示す状態とする。
【００１５】
次に、図２（Ｃ）に示すように各コイル３０を図中矢印Ｂの方向に移動させ、その内周面の一側を各第１の磁極テイース部材２７の分割面２７ａとは異なる側の他面にそれぞれ当接させた後、第２の磁極テイース部材２９を図中矢印Ｃの方向に移動させる。そして、図２（Ｄ）に示すように第２の磁極テイース部材２９を、第１の磁極テイース部材２７の分割面２７ａとコイル３０の内周面の他側の間に挿入し、根元部２９ａを溝部２８に嵌合させ、最後に、両磁極テイース部材２７、２９の各分割面２７ａ、２９ｂが当接される部分の先端を、レーザ３１により溶接して固着一体化させることにより可動子２５が完成する。
【００１６】
このように上記実施の形態１によれば、磁極テイースを可動子ヨーク２６と一体化された第１の磁極テイース部材２７と、可動子ヨーク２６の第１の磁極テイース部材２７の根元に沿って形成される溝部２８に、根元部２９ａが嵌合して保持されるとともに、第１の磁極テイース部材２７とお互いの分割面２７ａ、２９ｂ同士が当接され、且つ突出方向に着脱可能な第２の磁極テイース部材２９とで構成し、第１の磁極テイース部材２７にコイル３０を装着した後、第１の磁極テイース部材２７とコイル３０の間に第２の磁極テイース部材２９を挿入するようにしているので、隣接するコイル３０同士が接触して擦り合わされることもなくなるため、絶縁不良や断線を生じる恐れがなく信頼性の向上を図ることができる。
【００１７】
なお、上記では詳しく説明しなかったが、図４に示すようにコイル３０の内側の幅Ｗ_１と、第１の磁極テイース部材２７の最大部の幅Ｗ_２がＷ_１＞Ｗ_２となるようにして、コイル３０が第１の磁極テイース部材２７に挿入できるようにしておかなければならないことは言うまでもない。
【００１８】
実施の形態２．
図５はこの発明の実施の形態２におけるリニアモータの可動子の構成を一部を展開して示す斜視図である。
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。３２は可動子ヨーク２６の溝部２８に根元部３２ａが嵌合して保持され、一側の分割面３２ｂが第１の磁極テイース部材２７の分割面２７ａと当接された第２の磁極テイース部材で、延在方向に複数（図示では２個）に分割されている。
【００１９】
このように上記実施の形態２によれば、第２の磁極テイース部材３２を延在方向に複数に分割しているので、特に延在方向の寸法の大きなものに適用した場合の、第２の磁極テイース部材３２の挿入が一体のものと比較して容易となるため、絶縁不良や断線の生じる恐れがより少なくなり、さらに信頼性の向上を図ることができる。
【００２０】
実施の形態３．
図６はこの発明の実施の形態３におけるリニアモータの要部の構成を示す正面図である。
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。３３は第１の磁極テイース部材２７の根元に沿って形成される溝部で、その側壁３４は上部に係合突起３４ａを有し、溝部３３に沿って形成される第２の溝部３５により、第２の溝部３５側に可撓性を有して変形可能に形成されている。３６は溝部３３に根元部３６ａが嵌合して保持され、一側の分割面３６ｂが第１の磁極テイース部材２７の分割面２７ａと当接された第２の磁極テイース部材で、根元部３６ａの側壁３４の係合突起３４ａと対応する位置には、係合突起３４ａと係合する係合窪み３６ｃが形成されている。
【００２１】
このように上記実施の形態３によれば、第２の溝部３５により溝部３３の側壁３４を可撓性を有して変形可能としたので、第２の磁極テイース部材３６の挿入時には、側壁３４が第２の溝部３５側に変形して挿入を容易とすることができるため、作業性の向上を図ることができる。
なお、上記各実施の形態１ないし３における第２の磁極テイース部材２９、３２、３６は、配置方向に複数に分割されていても良く、一体の場合と同様の効果を得ることができる。
【００２２】
【発明の効果】
以上のように、この発明の請求項１によれば、固定子ヨーク上に交互に極性が異なる複数の永久磁石が所定の間隔を介して配置された固定子と、永久磁石と対向して配置された可動子ヨークの対向面に、永久磁石の配置方向に所定の間隔を介し突出して形成された複数の磁極テイース、および各磁極テイースの周囲をそれぞれ取り囲むように配設されるコイルでなる可動子とを備えたリニアモータにおいて、磁極テイースは配置方向に２分割されるとともにいずれか一方が可動子ヨークから突出方向に着脱可能に形成したので、信頼性の向上を図ることが可能なリニアモータを提供することができる。
【００２３】
又、この発明の請求項２によれば、請求項１において、磁極テイースを、可動子ヨークと一体に形成された第１の磁極テイース部材と、可動子ヨークの第１の磁極テイース部材の根元に沿って形成される溝部に、根元部が嵌合して保持されるとともに第１の磁極テイース部材と分割面同士が当接された第２の磁極テイース部材とで構成したので、簡単な構成で信頼性の向上を図ることが可能なリニアモータを提供することができる。
【００２４】
又、この発明の請求項３によれば、請求項２において、第２の磁極テイース部材を、延在方向に複数に分割したので、さらに信頼性の向上を図ることが可能なリニアモータを提供することができる。
【００２５】
又、この発明の請求項４によれば、請求項２において、可動子ヨークの第１の磁極テイース部材の根元に沿って形成される溝部の近傍に、溝部に沿って第２の溝部を形成することにより溝部の側壁が第２の溝部側へ可撓性を有して変形可能としたので、作業性の向上を図ることが可能なリニアモータを提供することができる。
【００２６】
又、この発明の請求項５によれば、巻回されたコイルを第１の磁極テイース部材を取り囲むように配置し、コイルの内周面の一側を第１の磁極テイース部材の分割面とは異なる側の他面に当接させる工程と、第１の磁極テイース部材の分割面とコイルの内周面の他側との間に第２の磁極テイース部材を挿入し、根元部を溝部に嵌合させる工程とを少なくとも包含したので、信頼性の向上を図ることが可能なリニアモータの製造方法を提供することができる。
【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におけるリニアモータの組立の工程を示す断面図である。
【図３】図１におけるリニアモータの可動子の構成を一部を展開して示す斜視図である。
【図４】第１の磁極テイース部材とコイルの寸法関係を示す断面図である。
【図５】この発明の実施の形態２におけるリニアモータの可動子の構成を一部を展開して示す斜視図である。
【図６】この発明の実施の形態３におけるリニアモータの要部の構成を示す正面図である。
【図７】従来のリニアモータの構成を示す断面図である。
【符号の説明】
２１固定子、２２固定子ヨーク、２３，２４永久磁石、２５可動子、２６可動子ヨーク、２７第１の磁極テイース部材、
２７ａ，２９ｂ，３２ｂ，３６ｂ分割面、２８，３３溝部、
２９，３２，３６第２の磁極テイース部材、
２９ａ，３２ａ，３６ａ根元部、３０コイル、３１レーザ、３４側壁、３５第２の溝部。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a linear motor particularly used for table feed of a machine tool and a manufacturing method thereof.
[0002]
[Prior art]
FIG. 7 is a cross-sectional view showing the configuration of this type of conventional linear motor disclosed in, for example, Japanese Patent Laid-Open No. 2000-217334.
In the figure, reference numeral 1 denotes a stator in which a plurality of permanent magnets 3a and 3b having different polarities are alternately arranged on a stator yoke 2 at a predetermined interval. Reference numeral 4 denotes a predetermined gap along the stator 1. It is a mover which moves through.
[0003]
The movable element 4 includes a movable element yoke 5 and a coupling member having a trapezoidal cross section that is held on a surface of the movable element yoke 5 facing the stator 1 with a bolt screw 6 at a predetermined interval. 7. A plurality of first portions each having a substantially T-shaped cross section and coupled to the coupling member 7 via a dovetail groove 8a formed at the center of one end, and having concave and convex portions 8b and 8c on both sides. The magnetic pole tee member 8 is formed in a substantially I-shaped cross section, and the concave and convex portions 9a and 9b on both sides are fitted into the concave and convex portions 8b and 8c of the first magnetic pole tee member 8, thereby A plurality of second magnetic pole tee members 9 inserted between one magnetic pole tee member 8, a coil 10 wound around each of these magnetic pole tee members 8, 9, and the periphery of these magnetic pole tee members 8, 9. Arranged to surround and fix these It is composed of a mold resin 11 to the body of.
[0004]
The conventional linear motor is configured as described above, and in assembling the mover 4, first, the coils 10 are wound around the first and second magnetic pole teeth members 8 and 9, respectively. Next, the dovetail groove 8a of each first magnetic pole tooth member 8 is fitted and slid to the coupling member 7 held by the mover yoke 5 via the bolt screw 6, and the bolt screw 6 is tightened at a predetermined position. Are fixed on the mover yoke 5 respectively. Next, the first magnetic pole tee member 9 is slid by fitting the concave and convex portions 9a and 9b of the second magnetic pole tee member 9 into the concave and convex portions 8b and 8c of the first magnetic pole tee member 8, respectively. Each second magnetic pole tee member 9 is inserted between the tee members 8. Finally, these magnetic pole teeth members 8 and 9 and the coil 10 are surrounded by a mold resin 11 and fixedly integrated.
[0005]
[Problems to be solved by the invention]
In the conventional linear motor, as described above, the second magnetic pole tee member 9 is slid and inserted between the first magnetic pole tee members 8 held on the mover yoke 5 by the coupling member 7. Since the coils 10 wound around the magnetic pole tee members 8 and 9 are rubbed in contact with each other when the second magnetic pole tee member 9 slides, insulation failure and disconnection are prevented. There is a problem that it may occur and reliability is lowered.
[0006]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a linear motor capable of improving reliability and a manufacturing method thereof.
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a linear motor having a stator in which a plurality of permanent magnets having different polarities alternately arranged on a stator yoke via a predetermined interval, and a movable element arranged to face the permanent magnet. A plurality of magnetic pole teeth formed on the opposing surface of the child yoke so as to protrude through a predetermined interval in the arrangement direction of the permanent magnets, and a mover made of a coil disposed so as to surround each of the magnetic pole teeth. In the linear motor provided, the magnetic pole teeth are divided into two in the arrangement direction, and one of them is formed to be detachable in the protruding direction from the mover yoke.
[0008]
A linear motor according to a second aspect of the present invention is the linear motor according to the first aspect, wherein the magnetic pole teeth are formed by integrating a first magnetic pole tooth member formed integrally with the mover yoke and a first magnetic pole tooth member of the mover yoke. The base portion is fitted and held in the groove portion formed along the root of the first magnetic pole tee member and the second magnetic pole tee member in which the divided surfaces are in contact with each other. .
[0009]
A linear motor according to a third aspect of the present invention is the linear motor according to the second aspect, wherein the second magnetic pole tee member is divided into a plurality of parts in the extending direction.
[0010]
According to a fourth aspect of the present invention, there is provided the linear motor according to the second aspect, wherein the second groove portion is formed along the groove portion in the vicinity of the groove portion formed along the root of the first magnetic pole tee member of the mover yoke. Thus, the side wall of the groove portion is flexible and deformable toward the second groove portion side.
[0011]
According to a fifth aspect of the present invention, there is provided a linear motor manufacturing method in which a wound coil is disposed so as to surround the first magnetic pole tee member, and one side of the inner peripheral surface of the coil is disposed on the first magnetic pole tee. Inserting the second magnetic pole tee member between the split surface of the first magnetic pole tee member and the other side of the inner peripheral surface of the coil; And a step of fitting the root portion into the groove portion.
[0012]
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 cross-sectional view showing a configuration of a linear motor according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view showing an assembly process of the linear motor in FIG. 1, and FIG. 3 is a configuration of a mover of the linear motor in FIG. FIG. 4 is a cross-sectional view showing the dimensional relationship between the first magnetic pole teeth member and the coil.
[0013]
In the figure, reference numeral 21 denotes a stator in which a plurality of permanent magnets 23 and 24 having different polarities are alternately arranged on a plate-like stator yoke 22 at a predetermined interval, and 25 is a predetermined gap between the stator 21 and a predetermined gap. (Shown by g in the figure) is a mover that is movable in the direction indicated by arrow A in the figure, and on the surface of the mover yoke 26 facing the stator 21 of the mover yoke 26, A plurality of first magnetic pole teeth members 27 having a dividing surface 27a on one side and formed along the roots of the first magnetic pole teeth members 27 of the mover yoke 26 are formed protruding in the moving direction at a predetermined interval. A second magnetic pole tee member 29 in which the root portion 29a is fitted and held in the groove portion 28 and the one split surface 29b is in contact with the split surface 27a of the first magnetic pole tee member 27; And second magnetic pole teeth members 27, 2 The is composed of a coil 30 disposed so as to surround each.
[0014]
Next, the assembly process of the mover 25 of the linear motor according to Embodiment 1 of the present invention configured as described above will be described with reference to FIG.
First, as shown in FIG. 2A, the coil 30 is inserted into the first magnetic pole tee member 27 of the mover 25 in the direction indicated by the arrow A in the figure. Next, the coil 30 is sequentially inserted into the first magnetic pole teeth member 27 as described above to obtain the state shown in FIG.
[0015]
Next, as shown in FIG. 2 (C), each coil 30 is moved in the direction of arrow B in the figure, and one side of its inner peripheral surface is a side different from the dividing surface 27a of each first magnetic pole tee member 27. After contacting each other surface, the second magnetic pole tee member 29 is moved in the direction of arrow C in the figure. Then, as shown in FIG. 2D, the second magnetic pole tee member 29 is inserted between the split surface 27a of the first magnetic pole tee member 27 and the other side of the inner peripheral surface of the coil 30, and the root portion 29a. Is fitted into the groove portion 28, and finally, the tip of the portion where the divided surfaces 27a and 29b of the magnetic pole teeth members 27 and 29 are in contact with each other is welded and integrated with the laser 31 to be integrated. Is completed.
[0016]
As described above, according to the first embodiment, the first magnetic pole tee member 27 in which the magnetic pole teeth are integrated with the mover yoke 26 and the root of the first magnetic pole tee member 27 of the mover yoke 26 are provided. The root portion 29a is fitted and held in the formed groove portion 28, and the first magnetic pole tee member 27 and the divided surfaces 27a and 29b are in contact with each other, and are detachable in the protruding direction. And the second magnetic pole tee member 29 is inserted between the first magnetic pole tee member 27 and the coil 30 after the coil 30 is mounted on the first magnetic pole tee member 27. Therefore, the adjacent coils 30 are not brought into contact with each other and rubbed against each other, so that there is no fear of insulation failure or disconnection, and reliability can be improved.
[0017]
Although not described in detail above, as shown in FIG. 4, the width W ₁ inside the coil 30 and the width W ₂ of the maximum portion of the first magnetic pole tooth member 27 satisfy W ₁ > W _2. Thus, it goes without saying that the coil 30 must be inserted into the first magnetic pole tooth member 27.
[0018]
Embodiment 2. FIG.
FIG. 5 is a perspective view showing a part of the configuration of the mover of the linear motor according to the second embodiment of the present invention.
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. Reference numeral 32 denotes a second magnetic pole tee member in which the root portion 32 a is fitted and held in the groove portion 28 of the mover yoke 26, and one divided surface 32 b is in contact with the divided surface 27 a of the first magnetic pole tee member 27. Thus, it is divided into a plurality (two in the drawing) in the extending direction.
[0019]
As described above, according to the second embodiment, since the second magnetic pole tee member 32 is divided into a plurality of parts in the extending direction, the second magnetic pole tee member 32 particularly when applied to a member having a large dimension in the extending direction. Since the insertion of the magnetic pole tee member 32 becomes easier as compared with an integrated one, there is less risk of insulation failure and disconnection, and further improvement in reliability can be achieved.
[0020]
Embodiment 3 FIG.
FIG. 6 is a front view showing the configuration of the main part of the linear motor according to Embodiment 3 of the present invention.
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. Reference numeral 33 denotes a groove formed along the base of the first magnetic pole tooth member 27, and its side wall 34 has an engaging projection 34 a on the upper portion, and the second groove 35 formed along the groove 33 forms the first The second groove portion 35 is flexible and deformable. Reference numeral 36 denotes a second magnetic pole tee member in which the root portion 36a is fitted and held in the groove portion 33, and the divided surface 36b on one side is in contact with the divided surface 27a of the first magnetic pole tee member 27. An engagement recess 36c that engages with the engagement protrusion 34a is formed at a position corresponding to the engagement protrusion 34a of the side wall 34.
[0021]
As described above, according to the third embodiment, the side wall 34 of the groove portion 33 can be flexibly deformed by the second groove portion 35, so that the side wall 34 is inserted when the second magnetic pole tee member 36 is inserted. However, since it can be easily inserted by being deformed to the second groove 35 side, workability can be improved.
Note that the second magnetic pole tee members 29, 32, and 36 in the first to third embodiments may be divided into a plurality of parts in the arrangement direction, and the same effects as in the case of being integrated can be obtained.
[0022]
【The invention's effect】
As described above, according to the first aspect of the present invention, the stator in which the plurality of permanent magnets having different polarities alternately arranged on the stator yoke are arranged at a predetermined interval and the permanent magnet are arranged opposite to each other. The movable arm is composed of a plurality of magnetic pole teeth projecting from the opposing surface of the mover yoke at a predetermined interval in the arrangement direction of the permanent magnets, and a coil disposed so as to surround each of the magnetic pole teeth. In the linear motor provided with the child, the magnetic pole teeth are divided into two in the arrangement direction and one of them is formed to be detachable in the protruding direction from the mover yoke, so that the linear motor can be improved in reliability. Can be provided.
[0023]
According to a second aspect of the present invention, in the first aspect, the magnetic pole teeth are divided into a first magnetic pole tee member formed integrally with the mover yoke, and a root of the first magnetic pole tee member of the mover yoke. Since the root portion is fitted and held in the groove portion formed along the first magnetic pole tee member and the second magnetic pole tee member in which the divided surfaces are in contact with each other, a simple configuration Thus, it is possible to provide a linear motor capable of improving the reliability.
[0024]
According to a third aspect of the present invention, in the second aspect, since the second magnetic pole tee member is divided into a plurality of parts in the extending direction, a linear motor capable of further improving the reliability is provided. can do.
[0025]
According to claim 4 of the present invention, in claim 2, the second groove portion is formed along the groove portion in the vicinity of the groove portion formed along the root of the first magnetic pole tee member of the mover yoke. By doing so, since the side wall of the groove portion is flexible and deformable toward the second groove portion side, a linear motor capable of improving workability can be provided.
[0026]
According to claim 5 of the present invention, the wound coil is disposed so as to surround the first magnetic pole tee member, and one side of the inner peripheral surface of the coil is divided with the divided surface of the first magnetic pole tee member. A second magnetic pole tee member is inserted between the split surface of the first magnetic pole tee member and the other side of the inner peripheral surface of the coil, and the root portion is used as a groove portion. Since it includes at least the step of fitting, it is possible to provide a method of manufacturing a linear motor capable of improving reliability.
[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 is a cross-sectional view showing a process of assembling the linear motor in FIG. 1. FIG.
FIG. 3 is a perspective view showing a part of the configuration of the mover of the linear motor in FIG.
FIG. 4 is a cross-sectional view showing a dimensional relationship between a first magnetic pole teeth member and a coil.
FIG. 5 is a perspective view showing a part of the configuration of a mover of a linear motor according to Embodiment 2 of the present invention.
FIG. 6 is a front view showing a configuration of a main part of a linear motor according to Embodiment 3 of the present invention.
FIG. 7 is a cross-sectional view showing a configuration of a conventional linear motor.
[Explanation of symbols]
21 stator, 22 stator yoke, 23, 24 permanent magnet, 25 mover, 26 mover yoke, 27 first magnetic pole teeth member,
27a, 29b, 32b, 36b Dividing surface, 28, 33 Groove,
29, 32, 36 second magnetic pole teeth member,
29a, 32a, 36a Root part, 30 coil, 31 laser, 34 side wall, 35 second groove part.

Claims

A stator in which a plurality of permanent magnets having different polarities alternately arranged on a stator yoke are arranged at a predetermined interval, and a surface of the mover yoke arranged to face the permanent magnet, In the linear motor comprising a plurality of magnetic pole teeth formed projecting at a predetermined interval in the arrangement direction, and a mover made of a coil arranged so as to surround each of the magnetic pole teeth, the magnetic pole teeth Is divided into two in the arrangement direction, and one of them is formed to be detachable from the mover yoke in the projecting direction.

The magnetic pole teeth are fitted with a first magnetic pole teeth member formed integrally with the mover yoke and a groove formed along the root of the first magnetic pole teeth member of the mover yoke. 2. The linear motor according to claim 1, wherein the linear motor is configured to be held by the first magnetic pole tee member and a second magnetic pole tee member whose divided surfaces are in contact with each other.

The linear motor according to claim 2, wherein the second magnetic pole teeth member is divided into a plurality of parts in the extending direction.

By forming the second groove portion along the groove portion in the vicinity of the groove portion formed along the root of the first magnetic pole teeth member of the mover yoke, the side wall of the groove portion can be moved toward the second groove portion side. The linear motor according to claim 2, wherein the linear motor is flexible and deformable.

The wound coil is disposed so as to surround the first magnetic pole tee member, and one side of the inner peripheral surface of the coil is brought into contact with the other surface on the side different from the divided surface of the first magnetic pole tee member. And at least a step of inserting a second magnetic pole tee member between the split surface of the first magnetic pole tee member and the other side of the inner peripheral surface of the coil and fitting the root portion into the groove portion. A method of manufacturing a linear motor according to claim 2, wherein