JP2015171249A - Stator of motor - Google Patents

Stator of motor Download PDF

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JP2015171249A
JP2015171249A JP2014045219A JP2014045219A JP2015171249A JP 2015171249 A JP2015171249 A JP 2015171249A JP 2014045219 A JP2014045219 A JP 2014045219A JP 2014045219 A JP2014045219 A JP 2014045219A JP 2015171249 A JP2015171249 A JP 2015171249A
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stator
teeth
stator core
protection member
electric wire
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JP6469954B2 (en
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武藤　淳
Atsushi Muto
淳 武藤
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Oriental Motor Co Ltd
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Oriental Motor Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a stator of a motor that can solve the problem by forming level differences in teeth parts on both ends in a lamination-thickness direction of a stator core subjected to insulation coating, and attaching end parts of protecting members for the stator to the level differences.SOLUTION: The stator of a motor has: a yoke part 16 annularly formed; a stator core 11 constituted of a plurality of teeth parts 17 that are protruded inward from the yoke part 16 in a direction orthogonal to a shaft direction of a rotator when the rotator is arranged in the yoke part 16. On both end faces in the shaft direction in the teeth parts 17 of the stator core 11, level difference parts 18 are formed and approximately U-shaped protecting members 30 to be engaged with the level difference parts 18 are provided across both end faces of the teeth parts 17.

Description

本発明はステッピングモーター、特にハイブリッド型ステッピングモーターに適用可能なモーターの固定子に関する。   The present invention relates to a motor stator applicable to a stepping motor, particularly a hybrid stepping motor.

従来、この種のモーターの固定子としては、複数の鋼板を積層して固定子コアが形成されており、固定子コアには電線を巻回するためのティースを有している。電線は、固定子コアとの間で絶縁が保たれる必要がある。このため、例えば、固定子コアの露出部分を絶縁材料によりコーティングし、かつ電線も絶縁材料により被覆して、絶縁性を確保する必要がある。そして、絶縁コーティングされた固定子コアのティースに電線を巻回する。しかしながら、電線を巻回する際に、固定子コアのティースのエッジ部分に、電線が食い込んで、絶縁性能を劣化し、耐圧低下を引き起こす問題があった。
他に、電線が直接的に接触しないように、電線と接する部分に樹脂製の絶縁部材を固定子コアに被せている。しかしながら、電線が巻回される部分を覆うように、固定子コアのティース部分およびスロット形状に合わせて絶縁部材を成形し、固定子コアのスロットに樹脂部材を挿入している。これでは絶縁部材を挿入する工程が必要となり、作業に時間が掛かる。また、鋼板の積層方向に沿うスロットの全長に亘って絶縁部材が固定子コアを保護するので、鋼板の積層枚数を変更すると、絶縁部材の形状も変更しなくてはならない。これでは、絶縁部材のコストが高くなってしまう。また、絶縁部材がスロット内に設けられることで電線を巻回する領域が狭く限定され、巻線効率が低下する。さらに、固定子コアと電線の間に絶縁部材が設けられることで、電流が流れて発熱した電線から固定子コアへ熱が伝わり難くなり、放熱性が低下するという問題があった。 Conventionally, as a stator of this type of motor, a stator core is formed by laminating a plurality of steel plates, and the stator core has teeth for winding an electric wire. The electric wire needs to be insulated from the stator core. For this reason, for example, it is necessary to coat the exposed portion of the stator core with an insulating material and coat the electric wire with the insulating material to ensure insulation. Then, the electric wire is wound around the teeth of the stator core that is coated with insulation. However, when winding the electric wire, there is a problem that the electric wire bites into the edge portion of the teeth of the stator core, which deteriorates the insulation performance and causes a decrease in the withstand voltage.
In addition, an insulating member made of resin is placed on the stator core so that the wire is not in direct contact with the wire. However, the insulating member is formed in accordance with the teeth portion and the slot shape of the stator core so as to cover the portion around which the electric wire is wound, and the resin member is inserted into the slot of the stator core. This requires a step of inserting an insulating member, and takes time for work. In addition, since the insulating member protects the stator core over the entire length of the slot along the stacking direction of the steel plates, the shape of the insulating member must be changed when the number of stacked steel plates is changed. This increases the cost of the insulating member. Moreover, the area | region which winds an electric wire is limited narrowly by providing an insulating member in a slot, and winding efficiency falls. Further, since the insulating member is provided between the stator core and the electric wire, there is a problem that heat is hardly transmitted from the electric wire that has generated heat due to current flow to the stator core, and heat dissipation is reduced.

これに鑑みて、特許文献１では、図９および図１０に示すように環状に形成されるヨーク部１０１と、前記ヨーク部１０１内に可動子を配置した際の当該可動子の軸方向と直交する方向に、前記ヨーク部１０１から内側に突設される複数のティース部１０２とを有する固定子コア１００に、軸方向における前記ティース部１０２の両端面に取り付けられ、当該ティース部１０２の角を保護すると共に、前記ティース部１０２間のスロット１０３においては前記ティース部１０２の前記軸方向の全長の半分よりも短く形成された保護部材１０４を装着している。   In view of this, in Patent Document 1, as shown in FIG. 9 and FIG. 10, a yoke part 101 formed in an annular shape and orthogonal to the axial direction of the mover when the mover is arranged in the yoke part 101. Are attached to both end surfaces of the teeth portion 102 in the axial direction, and the corners of the teeth portion 102 are set to the stator core 100 having a plurality of teeth portions 102 projecting inwardly from the yoke portion 101. In addition to protecting, a protective member 104 formed to be shorter than a half of the overall length of the tooth portion 102 in the axial direction is mounted in the slot 103 between the tooth portions 102.

特開２０１３−１３２１０８号公報JP 2013-132108 A

しかしながら、特許文献１の先行技術では、固定子用保護部材１０４は、ティース部１０２の両側のスロット１０３に亘るＵの字状に形成されている。この固定子用保護部材１０４の端部１０４ａは、スロット１０３に挿入されている。挿入される端部１０４ａは、スロット１０３の積層方向の全長、すなわち、ティース部１０２の積層方向の全長の半分よりも短く、ティース部１０２を介して積層方向に対向する固定子用保護部材１０４と組み合わさっても、ティース部１０２の全長を覆わない構成としているが、ティース部１０２の両端面に挿入される端部１０４ａがあるので、電線１０５を巻回する領域が狭く限定され、巻線効率が低下すること、および、固定子と電線１０５の間に隙間ができてしまうことで、電流が流れて発熱する電線から固定子へ熱が伝わり難くなり、放熱性が低下するという問題は、解決されていない。
特許文献１には、変形例１として、端部がスロット１０３に全く挿入されない固定子用保護部材１０４の例が示されている。この例においては、上記問題は解決されるが、固定子用保護部材１０４を固定するために接着が必要であり、さらに接着固定する際の位置決めが難しく、生産上の問題がある。 However, in the prior art of Patent Document 1, the stator protection member 104 is formed in a U shape extending over the slots 103 on both sides of the tooth portion 102. An end 104 a of the stator protection member 104 is inserted into the slot 103. The inserted end 104a is shorter than the total length of the slots 103 in the stacking direction, that is, half of the total length of the teeth 102 in the stacking direction, and the stator protection member 104 facing the stacking direction via the teeth 102 Even if they are combined, the entire length of the tooth portion 102 is not covered. However, since there are end portions 104a inserted into both end faces of the tooth portion 102, the area in which the electric wire 105 is wound is limited and the winding efficiency is reduced. Is reduced, and a gap is formed between the stator and the electric wire 105, so that it is difficult for heat to be transmitted from the electric wire that generates heat due to current flow to the stator, and the heat dissipation is reduced. It has not been.
Patent Document 1 shows an example of a stator protection member 104 whose end portion is not inserted into the slot 103 at all as a first modification. In this example, although the above-mentioned problem is solved, adhesion is necessary to fix the stator protection member 104, and further positioning is difficult when bonding and fixing, and there is a problem in production.

本発明は、このような従来の問題点（欠点）に着目してなされたもので、絶縁コーティングされた固定子コアの積厚方向両端のティース部に段差を設け、この段差に固定子用保護部材の端部を組み付けることにより上記問題点を解決することができるモーターの固定子を提供することを目的とする。   The present invention has been made paying attention to such conventional problems (defects), and a step is provided in the teeth portions at both ends in the stacking direction of the insulating coated stator core, and the stator protection is provided at the step. It aims at providing the stator of the motor which can solve the above-mentioned problem by attaching the end of a member.

本発明は、上記課題を解決するため、環状に形成されたヨーク部と、前記ヨーク部内に回転子を配置した際の当該回転子の軸方向と直交する方向に、前記ヨーク部から内側に突設される複数のティース部とからなる固定子コアを有し、前記固定子コアのティース部における前記軸方向両端面には、段部が形成され、前記ティース部の両端面に跨って前記段部に係合する略Ｕ字形状の保護部材を設けたことにある。
本発明の前記固定子コアでは、複数の鋼板を積層して形成され、かつ両端面の鋼板のティース部の幅を細く形成して前記段部を形成することができる。また、前記保護部材に突部、前記固定子コアの軸方向両端のティース部に穴部を設け、前記保護部材の突部を前記ティース部の穴部に挿入させて位置決め固定を行なうことができる。さらに、前記保護部材を前記固定子コアのヨーク部に沿うように形成された環状部で連結して固定子カバーを形成し、該固定子カバーの保護部材を前記ティース部にそれぞれ組み付けて固定子を形成したことにある。 In order to solve the above-described problems, the present invention projects inwardly from the yoke portion in a direction perpendicular to the axial direction of the rotor when the rotor is disposed in the yoke portion and the yoke portion formed in an annular shape. A stator core composed of a plurality of teeth portions provided; step portions are formed on both end surfaces in the axial direction of the teeth portions of the stator cores, and the step portions straddle both end surfaces of the teeth portions; A substantially U-shaped protective member that engages with the portion is provided.
In the stator core of the present invention, the step portion can be formed by laminating a plurality of steel plates and forming the widths of the tooth portions of the steel plates on both end faces narrow. Further, a protrusion can be provided in the protection member, and holes can be provided in the tooth portions at both ends of the stator core in the axial direction, and the protrusion of the protection member can be inserted into the hole in the teeth portion for positioning and fixing. . Further, the protection member is connected by an annular portion formed along the yoke portion of the stator core to form a stator cover, and the protection member of the stator cover is assembled to the teeth portion, respectively. It is in having formed.

本発明によれば、固定子コアのティース部における軸方向両端面には、段部が形成され、ティース部の両端面に跨って段部に係合する略Ｕ字形状の保護部材を設けたので、保護部材の端部がティース部の側面と面一になっていることから、電線を巻回するスロットの領域を制限しないので、巻線効率が向上する。また、固定子コアと電線の間に隙間が生じることがないので、電流が流れることで発熱した電線から固定子コアへ熱が効率よく伝わり、放熱性が向上する。   According to the present invention, a stepped portion is formed on both end surfaces in the axial direction of the teeth portion of the stator core, and a substantially U-shaped protective member that engages with the stepped portion across the both end surfaces of the teeth portion is provided. Therefore, since the end portion of the protection member is flush with the side surface of the tooth portion, the area of the slot around which the electric wire is wound is not limited, and the winding efficiency is improved. In addition, since no gap is generated between the stator core and the electric wire, heat is efficiently transferred from the electric wire generated by the current flow to the stator core, and heat dissipation is improved.

本発明のモーターの固定子をステッピングモーターに採用した実施の形態を示す半断面図である。It is a half sectional view showing an embodiment which adopted a stator of a motor of the present invention for a stepping motor. 本発明のモーターの固定子の実施の形態による固定子用保護部材を取り付けた固定子コアを示す平面図である。It is a top view which shows the stator core which attached the protection member for stators by embodiment of the stator of the motor of this invention. モーターの固定子コアに電線を巻回した際の図２のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 2 when an electric wire is wound around the stator core of a motor. 図２の固定子コアの積層態様を示す概念斜視図である。It is a conceptual perspective view which shows the lamination | stacking aspect of the stator core of FIG. 図２の固定子コアのティース部の段部に組み付けられる固定子用保護部材の組み付け態様を示す概念斜視図である。It is a conceptual perspective view which shows the assembly | attachment aspect of the protection member for stators assembled | attached to the step part of the teeth part of the stator core of FIG. 固定子用保護部材の他の変形例を示す斜視図である。It is a perspective view which shows the other modification of the protection member for stators. 固定子用保護部材を環状部で連結した固定子カバーを示す斜視図である。It is a perspective view which shows the stator cover which connected the protection member for stators by the annular part. 図７の固定子カバーを固定子コアのティース部の段部に組み付ける状態を示す概念斜視図である。It is a conceptual perspective view which shows the state which attaches the stator cover of FIG. 7 to the step part of the teeth part of a stator core. 従来のモーターの固定子コアのティース部に固定子用保護部材を取り付けた構造を示す斜視図である。It is a perspective view which shows the structure which attached the protection member for stators to the teeth part of the stator core of the conventional motor. 図９のティース部に固定子用保護部材を取り付けた構造を示す断面図である。FIG. 10 is a cross-sectional view showing a structure in which a stator protection member is attached to the teeth portion of FIG. 9.

以下、本発明の実施の形態を図１ないし図８を参照しながら詳細に説明する。
図１は、本発明の固定子を対象となるステッピングモーターに採用した実施の形態であり、ステッピングモーターのフランジ、ブラケットを固定子に内径嵌め合いで組み立てる構造を示したものである。
図２−５は、本発明の固定子の一実施の形態を示す図である。 Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.
FIG. 1 shows an embodiment in which a stator of the present invention is adopted as a target stepping motor, and shows a structure in which a flange and a bracket of the stepping motor are assembled to the stator by fitting with an inner diameter.
FIG. 2-5 is a diagram illustrating an embodiment of the stator of the present invention.

まず、図１のステッピングモーターの構成を説明すると、ステッピングモーター１０は、固定子コア１１と回転子１２の間のギャップが数１０μｍであり、固定子コア１１と回転子１２を軸受１３で回転自在に固定しているフランジ１４とブラケット１５との組み立てにおいて、同程度の精度が求められる。特に高精度の組み立てが必要であるステッピングモーター１０（特にハイブリッド型ステッピングモーター）の場合、図１のように、固定子コア１１の内径側１１ａとフランジ１４およびブラケット１５の回転子の軸受１３を固定するハウジング部１４ａ、１５aとを嵌め合うことで精度良く組み立てを行っている（内径嵌め合い）。固定子コア１１は、図４に示すように、積層された多数の鋼板１１ｂと、鋼板１１ｂの両側に配置される鋼板１１ｃで構成されている。このため、内径嵌め合いを行なうステッピングモーターは、内径嵌め合い分の固定子コア１１の鋼板１１ｃを積層する必要がある。図４では一枚ずつの鋼板１１ｃが多数の鋼板１１ｂの両側に配置されている。   First, the configuration of the stepping motor of FIG. 1 will be described. In the stepping motor 10, the gap between the stator core 11 and the rotor 12 is several tens of μm, and the stator core 11 and the rotor 12 can be freely rotated by a bearing 13. In the assembly of the flange 14 and the bracket 15 fixed to each other, the same degree of accuracy is required. In the case of a stepping motor 10 (particularly a hybrid type stepping motor) that requires particularly high precision assembly, as shown in FIG. 1, the inner diameter side 11 a of the stator core 11, the flange 14, and the rotor bearing 13 of the bracket 15 are fixed. The housing parts 14a and 15a to be assembled are assembled with high precision (internal diameter fitting). As shown in FIG. 4, the stator core 11 is composed of a large number of stacked steel plates 11b and steel plates 11c arranged on both sides of the steel plates 11b. For this reason, the stepping motor that performs the inner diameter fitting needs to stack the steel plates 11c of the stator core 11 corresponding to the inner diameter fitting. In FIG. 4, one steel plate 11c is arranged on both sides of many steel plates 11b.

図２−図５において、絶縁コーティングされた固定子コア１１は、環状に形成されたヨーク部１６と、ヨーク部１６内に回転子を配置した際の当該回転子の軸方向と直交する方向に、前記ヨーク部１６から円周方向に一定間隔で内側に突設される複数のティース部１７とで構成されている。
固定子コア１１は、ヨーク部１６と、ティース部１７とを備え、全体に樹脂によるコーティングが施されている。
前記固定子コア１１の鋼板１１ｂは一定幅ｍのティース部１７ａを有し、前記固定子コア１１の鋼板１１ｃは鋼板１１よりも幅の狭い幅ｎを持つティース部１７ｂを有している。
本実施形態に係る固定子コア１１は、図４に示すように、複数の同形状の鋼板１１ｂを積層し、その積厚方向の両端には、ティース部１７の幅のみを細くした内径側嵌め合い分の固定子コア１１の鋼板１１ｃを積層し、接着剤やカシメ加工等により固定することで形成されている。 In FIG. 2 to FIG. 5, the insulation-coated stator core 11 includes a yoke portion 16 formed in an annular shape and a direction orthogonal to the axial direction of the rotor when the rotor is disposed in the yoke portion 16. A plurality of teeth portions 17 projecting inward from the yoke portion 16 at regular intervals in the circumferential direction.
The stator core 11 includes a yoke portion 16 and a teeth portion 17 and is entirely coated with a resin.
The steel plate 11 b of the stator core 11 has a teeth portion 17 a having a constant width m, and the steel plate 11 c of the stator core 11 has a teeth portion 17 b having a width n that is narrower than the steel plate 11.
As shown in FIG. 4, the stator core 11 according to the present embodiment is formed by stacking a plurality of steel plates 11 b having the same shape, and fitting the inner diameter side of the both ends of the stacking direction in which only the width of the teeth portion 17 is narrowed. It is formed by laminating the steel plates 11c of the corresponding stator core 11 and fixing them by an adhesive or caulking.

この固定子コア１１のティース部１７には、図４に示すように固定子コア１１を構成する積層された鋼板１１ｂと、鋼板１１ｂの両側に配置される鋼板１１ｃでティース部１７が構成されており、図５に示すように鋼板１１ｂのティース部１７ａと鋼板１１ｃのティース部１７ｂの幅の違いによる段部１８が形成されている。
前記ティース部１７は、図２に示すように電線５０を巻回する部位であり、複数のティース部１７が周方向に一定間隔で並んで設けられている。このティース部１７は、実際に電線５０が巻回されるティース巻回部１９と、ティース巻回部１９の半径方向の内方向側に形成されるティース先端部２０と、を備えている。ティース先端部２０は、ティース巻回部１９から隣接する他のティース部１７に向かって両方向へ伸びて形成されている。ティース先端部２０の内方向側には、電動機を構成した際に回転子（不図示）と対面する円弧状のギャップ面２１が形成されている。ティース巻回部１９同士の間には、巻回した電線５０を収納するスロット２２が設けられている。
３０はティース部１７の段部１８に組み付けられる固定子用保護部材で、この保護部材３０は、横断面が略Ｕ字形状または略コ字形状に形成され、略直角に折り曲げられた両端部３１をティース部１７の段部１８に係合して位置決めが図られている。５０はティース部１７に巻回される電線である。固定子用保護部材３０の両端部３１の厚みは、鋼板１１ｂと鋼板１１ｃの幅の違いによって生じる前記段部１８の幅（ｍ-ｎ）とほぼ一致するように形成されている。 As shown in FIG. 4, the teeth portion 17 of the stator core 11 includes the stacked steel plates 11 b constituting the stator core 11 and the steel plates 11 c arranged on both sides of the steel plates 11 b. As shown in FIG. 5, a stepped portion 18 is formed due to a difference in width between the teeth portion 17a of the steel plate 11b and the teeth portion 17b of the steel plate 11c.
The teeth portion 17 is a portion around which the electric wire 50 is wound as shown in FIG. 2, and a plurality of teeth portions 17 are provided at regular intervals in the circumferential direction. The teeth portion 17 includes a teeth winding portion 19 where the electric wire 50 is actually wound, and a teeth tip portion 20 formed on the radially inward side of the teeth winding portion 19. The teeth tip portion 20 is formed to extend in both directions from the tooth winding portion 19 toward another adjacent tooth portion 17. An arcuate gap surface 21 that faces a rotor (not shown) when the electric motor is configured is formed on the inward side of the tooth tip 20. Between the teeth winding parts 19, the slot 22 which accommodates the wound electric wire 50 is provided.
Reference numeral 30 denotes a stator protection member assembled to the step portion 18 of the teeth portion 17. The protection member 30 has a transverse section formed in a substantially U shape or a substantially U shape and is bent at substantially right angles. Is positioned by engaging the stepped portion 18 of the tooth portion 17. Reference numeral 50 denotes an electric wire wound around the tooth portion 17. The thicknesses of both end portions 31 of the stator protection member 30 are formed so as to substantially coincide with the width (mn) of the step portion 18 caused by the difference in width between the steel plate 11b and the steel plate 11c.

本実施形態では、図５に示すように、固定子コア１１のティース部１７の積層方向の両端面の内径側嵌め合い分の鋼板１１ｃにより形成される段部１８に、固定子用保護部材３０の端部３１が嵌め込まれるようにして組み付けて取り付けられている。固定子用保護部材３０は、たとえば、樹脂などの絶縁材料により形成されている。固定子用保護部材３０は、図２に示すように、全てのティース部１７に跨るようにして取り付けられ、ティース部１７のティース巻回部１９の角部（図３参照）を覆っている。
前記内径側嵌め合い分の固定子コア１１の鋼板１１ｃのティース部１７には、固定用の穴２３を設け、かつ固定子用保護部材３０の裏面側に固定用の突部３２を設け、前記固定子用保護部材３０の端部３１をティースの段部１８に嵌め込むと共に、前記ティース部１７の穴２３に固定子用保護部材３０の裏面の突部３２を嵌め込むことにより、より強固に固定用保護部材３０を固定することができる。 In the present embodiment, as shown in FIG. 5, the stator protection member 30 is formed on the stepped portion 18 formed by the steel plates 11 c of the inner diameter side fittings on both end surfaces in the stacking direction of the teeth portion 17 of the stator core 11. As shown in FIG. The stator protection member 30 is formed of an insulating material such as resin, for example. As shown in FIG. 2, the stator protection member 30 is attached so as to straddle all the teeth portions 17 and covers the corners (see FIG. 3) of the teeth winding portion 19 of the teeth portion 17.
In the teeth portion 17 of the steel plate 11c of the stator core 11 for the inner diameter side fitting, a fixing hole 23 is provided, and a fixing protrusion 32 is provided on the back side of the stator protection member 30, The end portion 31 of the stator protection member 30 is fitted into the stepped portion 18 of the teeth, and the protrusion 32 on the back surface of the stator protection member 30 is fitted into the hole 23 of the teeth portion 17, thereby further strengthening. The fixing protection member 30 can be fixed.

また、図６に示すように、固定子用保護部材３０の両側面部には背面側に向けて立設された一対の壁部３３が設けられている。壁部３３があることで、ティース部１７に電線５０が巻回される際に、電線５０の一部がティース部１７の内方向または外方向に脱落して電線５０の巻回が崩れることを防止できる。   Further, as shown in FIG. 6, a pair of wall portions 33 erected toward the back side are provided on both side surface portions of the stator protection member 30. When the electric wire 50 is wound around the tooth portion 17 due to the presence of the wall portion 33, a part of the electric wire 50 falls off inward or outward of the tooth portion 17 and the winding of the electric wire 50 is broken. Can be prevented.

以上のように、本実施形態では、ティース部１７に固定子用保護部材３０が取り付けられている。この固定子用保護部材３０は、ティース部１７の角部を保護し、代わりに、電線５０の巻回方向に滑らかな曲面を露出している。したがって、固定子用保護部材３０を介して電線５０をティース部１７に巻回する際にティース部１７の角に電線５０が食い込んで破損することがなく、絶縁性能や耐圧性能が低下することを抑制できる。
また、固定子用保護部材３０を、ティース部１７の両端面に取り付ける際に、端部３１をティース部１７の段部１８に嵌め込むだけなので、作業性が向上し、作業時間を短縮できる。
さらに、固定子用保護部材３０の端部３１は、内径嵌め合い分の鋼板１１ｃで構成されたティース部１７の段部１８に嵌め込まれるので、端部３１により電線５０を巻回する領域が狭く限定されることがなくなり、巻線効率が低下することがない。さらに、固定子コア１１と電線５０が密着して巻回できるで、電流が流れて発熱する電線５０から固定子コア１１へ熱も効率よく伝わり、放熱性が向上する。
（固定子の内径嵌め合い部分は、もともとモーターの特性に影響しない部分を利用している。その部分を固定子用保護部材３０の端部３１が嵌めこまれても、モーターの特性には影響しない。） As described above, in this embodiment, the stator protection member 30 is attached to the tooth portion 17. The protection member 30 for the stator protects the corner portion of the tooth portion 17 and instead exposes a smooth curved surface in the winding direction of the electric wire 50. Therefore, when the electric wire 50 is wound around the tooth portion 17 through the stator protection member 30, the electric wire 50 does not bite into the corner of the tooth portion 17 and is damaged, and the insulation performance and the pressure resistance performance are reduced. Can be suppressed.
Moreover, when attaching the protection member 30 for stators to the both end surfaces of the teeth part 17, since the edge part 31 is only fitted in the step part 18 of the teeth part 17, workability | operativity improves and working time can be shortened.
Furthermore, since the end portion 31 of the stator protection member 30 is fitted into the step portion 18 of the tooth portion 17 formed of the steel plate 11c for fitting the inner diameter, the region where the electric wire 50 is wound by the end portion 31 is narrow. There is no limitation, and the winding efficiency does not decrease. Furthermore, since the stator core 11 and the electric wire 50 can be wound in close contact with each other, heat is efficiently transmitted from the electric wire 50 that generates heat by current flow to the stator core 11 and heat dissipation is improved.
(The inner diameter fitting portion of the stator originally uses a portion that does not affect the motor characteristics. Even if the end portion 31 of the stator protection member 30 is fitted into this portion, the motor characteristics are affected. do not do.)

次に図７、図８には、本発明の他の実施の形態を示す。
図７のように、ティース部１７に対応する複数の固定子用保護部材３０の一端部を一定間隔で環状部４１に連結して固定子カバー４２の形状にしたものである。
環状部４１は、ティース部１７の基端部を囲むようにヨーク部１６の内周に沿った形状に多角形に形成されており、ティース部１７の周囲に巻きつけられた電線５０が外方向に脱落して巻回が崩れることを防止する壁部を兼ねている。さらに固定子用保護部材３０の内側には壁部４３を軸方向に立設して電線５０の巻回が崩れることを防止するストッパーとしている。
各固定子用保護部材３０の両端部３１が、固定子コア１１の各ティース部１７の段部１８に嵌め込まれて、固定子カバー４２が固定されている。そして、前記ティース部１７の穴２３に固定子用保護部材３０の裏面の突部３２を嵌め込むことにより、より強固に固定用保護部材３０を固定することができる。
上記内容の効果に加え、各スロットに、積厚方向両端に、それぞれ固定子用保護部材３０を固定する作業が、積厚方向両端に固定子カバー４２を被せるだけになるので、作業性が向上する。また、同相間のスロット間の渡り線の処理も、固定子カバー４２の上方、軸方向に突設した渡り線処理部４４で行なうことができる。 Next, FIGS. 7 and 8 show another embodiment of the present invention.
As shown in FIG. 7, one end portions of a plurality of stator protection members 30 corresponding to the teeth portion 17 are connected to the annular portion 41 at regular intervals to form a stator cover 42.
The annular part 41 is formed in a polygonal shape along the inner periphery of the yoke part 16 so as to surround the base end part of the tooth part 17, and the electric wire 50 wound around the tooth part 17 is outwardly directed. It also serves as a wall to prevent the winding from collapsing. Further, a wall 43 is erected in the axial direction on the inner side of the stator protection member 30 so as to prevent the winding of the electric wire 50 from being broken.
Both end portions 31 of each stator protection member 30 are fitted into the step portions 18 of the teeth portions 17 of the stator core 11, and the stator cover 42 is fixed. Then, the fixing protection member 30 can be fixed more firmly by fitting the protrusion 32 on the back surface of the stator protection member 30 into the hole 23 of the tooth portion 17.
In addition to the above-described effects, the work of fixing the stator protection members 30 to the slots at both ends in the stacking direction can be performed by simply covering the stator covers 42 at both ends of the stacking direction. To do. Further, the processing of the connecting wire between the slots in the same phase can be performed by the connecting wire processing unit 44 protruding in the axial direction above the stator cover 42.

以上説明してきたように、前記実施の形態によれば、以下に列挙する効果が得られる。
固定子用保護部材３０の端部３１は、内径側嵌め合い分の鋼板１１ｃで構成されたティース部１７の段部１８に嵌め込まれるので、固定子用保護部材３０の端部３１により電線５０を巻回する領域が狭く限定されることがなくなり、巻線効率が低下することがない。さらに、固定子コア１１と電線５０が密着して巻回できるで、電流が流れて発熱する電線５０から固定子コア１１へ熱も効率よく伝わり、放熱性が向上する。
これは固定子の内径側嵌め合い部分は、もともとモーターの特性に影響しない部分を利用している。その部分に固定子用保護部材３０の端部３１が嵌めこまれても、モーターの特性には影響しない。 As described above, according to the embodiment, the effects listed below can be obtained.
Since the end portion 31 of the stator protection member 30 is fitted into the step portion 18 of the teeth portion 17 formed of the steel plate 11c for fitting on the inner diameter side, the electric wire 50 is connected by the end portion 31 of the stator protection member 30. The winding area is not limited to a narrow width, and the winding efficiency does not decrease. Furthermore, since the stator core 11 and the electric wire 50 can be wound in close contact with each other, heat is efficiently transmitted from the electric wire 50 that generates heat by current flow to the stator core 11 and heat dissipation is improved.
This uses a portion that does not affect the characteristics of the motor as the fitting portion on the inner diameter side of the stator. Even if the end portion 31 of the stator protection member 30 is fitted in that portion, the characteristics of the motor are not affected.

また、図７および図８の実施の形態では、各スロットに、積厚方向両端に、それぞれ固定子用保護部材３０を固定する作業が、積厚方向両端に固定子カバー４２を被せるだけで固定子用保護部材３０をティース部１７に組み付けることができるので、作業性が向上する。さらに、同相間のスロット間の渡り線の処理も、固定子カバー４２の渡り線処理部４４で行なうことができる。またさらに、固定子コア１１の積厚が変わっても固定子カバー４２を変更する必要がない。   Further, in the embodiment of FIG. 7 and FIG. 8, the operation of fixing the stator protection member 30 to each slot at both ends in the stacking direction is fixed only by covering the stator cover 42 at both ends in the stacking direction. Since the child protection member 30 can be assembled to the teeth portion 17, workability is improved. Further, the crossover processing between slots in the same phase can also be performed by the crossover processing section 44 of the stator cover 42. Furthermore, it is not necessary to change the stator cover 42 even if the thickness of the stator core 11 changes.

なお、本発明は、前記実施の形態のみに限定されるものではなく、例えば、固定子用保護部材３０は、ティース部１７の段部１８に嵌め込むことができればよいので、端部３１の長さは任意に設定することができる。また、固定用の突部３２は、ティース部１７の穴２３に係合すればよいので、円柱形状、あるいは角柱形状いずれの形状でもよい。また、固定用の突部３２の数も必要に応じて設定すればよい。等、その他、本発明の技術的範囲であれば、任意に変更して実施し得ることは言うまでもない。   Note that the present invention is not limited to the above-described embodiment. For example, the stator protection member 30 only needs to be able to be fitted into the step portion 18 of the teeth portion 17, so that the length of the end portion 31 is not limited. The size can be set arbitrarily. Further, the fixing protrusion 32 only needs to be engaged with the hole 23 of the tooth portion 17, and thus may have either a cylindrical shape or a prismatic shape. Further, the number of fixing protrusions 32 may be set as necessary. In addition, it goes without saying that the present invention can be arbitrarily changed and implemented within the technical scope of the present invention.

１０ ステッピングモーター
１１ 固定子コア
１１ｂ，１１ｃ 鋼板
１２ 回転子
１３ 軸受
１４ フランジ
１５ ブラケット
１６ ヨーク部
１７ ティース部
１７ａ，１７ｂ ティース部
１８ 段部
１９ ティース巻回部
２０ ティース先端部
２１ ギャップ面
２２ スロット
２３ 穴
３０ 固定子用保護部材
３１ 両端部
４２ 固定子カバー
５０ 電線 DESCRIPTION OF SYMBOLS 10 Stepping motor 11 Stator core 11b, 11c Steel plate 12 Rotor 13 Bearing 14 Flange 15 Bracket 16 Yoke part 17 Teeth part 17a, 17b Teeth part 18 Step part 19 Teeth winding part 20 Teeth tip part 21 Gap surface 22 Slot 23 Hole 30 Stator Protection Member 31 Both Ends 42 Stator Cover 50 Electric Wire

Claims (4)

環状に形成されたヨーク部と、前記ヨーク部内に回転子を配置した際の当該回転子の軸方向と直交する方向に、前記ヨーク部から内側に突設される複数のティース部とからなる固定子コアを有し、前記固定子コアのティース部における前記軸方向両端面には、段部が形成され、前記ティース部の両端面に跨って前記段部に係合する略Ｕ字形状の保護部材を設けたことを特徴とするモーターの固定子。   An annular yoke portion and a plurality of teeth portions projecting inwardly from the yoke portion in a direction perpendicular to the axial direction of the rotor when the rotor is disposed in the yoke portion. A substantially U-shaped protection which has a child core, and is formed with step portions on both end surfaces in the axial direction of the teeth portion of the stator core, and engages with the step portions across both end surfaces of the teeth portion. A stator for a motor, characterized in that a member is provided. 前記固定子コアは、複数の鋼板を積層して形成され、かつ両端面の鋼板のティース部の幅を細く形成して前記段部を形成したことを特徴とする請求項１に記載のモーターの固定子。   2. The motor according to claim 1, wherein the stator core is formed by laminating a plurality of steel plates, and the step portions are formed by narrowing the width of the tooth portions of the steel plates on both end faces. stator. 前記保護部材に突部、前記固定子コアの軸方向両端のティース部に穴部を設け、前記保護部材の突部を前記ティース部の穴部に挿入させて位置決め固定を行なうことを特徴とする請求項１または２に記載のモーターの固定子。   Protrusions are provided on the protective member, and holes are provided in teeth portions at both ends of the stator core in the axial direction, and the protrusions of the protective member are inserted into the holes of the teeth portion to perform positioning and fixing. The stator of the motor according to claim 1 or 2. 前記保護部材を前記固定子コアのヨーク部に沿うように形成された環状部で連結して固定子カバーを形成し、該固定子カバーの保護部材を前記ティース部にそれぞれ組み付けたことを特徴とする請求項１ないし３のいずれか１項に記載のモーターの固定子。   The protective member is connected by an annular portion formed along the yoke portion of the stator core to form a stator cover, and the protective member of the stator cover is assembled to the teeth portion, respectively. The stator of the motor according to any one of claims 1 to 3.
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