JP6392626B2 - ROTOR MANUFACTURING METHOD AND ROTOR - Google Patents

ROTOR MANUFACTURING METHOD AND ROTOR Download PDF

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JP6392626B2
JP6392626B2 JP2014215034A JP2014215034A JP6392626B2 JP 6392626 B2 JP6392626 B2 JP 6392626B2 JP 2014215034 A JP2014215034 A JP 2014215034A JP 2014215034 A JP2014215034 A JP 2014215034A JP 6392626 B2 JP6392626 B2 JP 6392626B2
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insertion hole
permanent magnet
positioning member
magnet
magnet insertion
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JP2016082830A (en
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亮 長井
亮 長井
吉田 康平
康平 吉田
雅志 松本
雅志 松本
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Mitsui High Tech Inc
Toyota Motor Corp
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Toyota Motor Corp
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本発明は、永久磁石を備える回転子の製造方法、及び該回転子に関する。   The present invention relates to a method for manufacturing a rotor including a permanent magnet, and the rotor.

永久磁石を備える回転子と、該回転子を備える電動機や発電機が知られている。この種の回転子の製造過程においては、永久磁石を回転子コアの所定の位置に正確に位置決めして取り付ける必要がある。永久磁石が本来の位置からずれていると、回転子の重量分布や磁束分布に不均衡が生じ、電動機や発電機の運転中に振動やトルク変動が生じるからである。また、永久磁石は回転子コアに確実に固定される必要がある。製造時点で永久磁石が正規の位置に取り付けられたとしても、電動機や発電機の運転中に永久磁石の固定が損なわれて、正規の位置からずれれば、振動やトルク変動が生じるからである。   A rotor including a permanent magnet, and an electric motor and a generator including the rotor are known. In the manufacturing process of this type of rotor, it is necessary to accurately position and attach the permanent magnet to a predetermined position of the rotor core. This is because if the permanent magnet is displaced from its original position, an imbalance occurs in the weight distribution and magnetic flux distribution of the rotor, and vibrations and torque fluctuations occur during operation of the motor and generator. Further, the permanent magnet needs to be securely fixed to the rotor core. This is because even if the permanent magnet is attached to the regular position at the time of manufacture, the permanent magnet is not fixed during operation of the electric motor or the generator, and if it deviates from the regular position, vibration or torque fluctuation occurs. .

永久磁石を正確に位置決めして、確実に固定する方法については、既に多数の発明が公開されている。例えば、特許文献1には、ロータヨーク(回転子コア)に磁石埋込孔(磁石挿入孔)を形成するとともに、該磁石埋込孔内に永久磁石と楔形断面を有する角柱スペーサを挿入して、永久磁石を磁石埋込孔内に固定するようにしたIPMモータが開示されている(特許文献1,図1)。角柱スペーサは、要するに「楔」であって、該「楔」の作用で、永久磁石を磁石挿入孔の内側面に押し付けている。また、樹脂で角柱スペーサを磁石挿入孔に固定している。   Numerous inventions have already been published on methods for accurately positioning and securely fixing the permanent magnet. For example, in Patent Document 1, a magnet embedded hole (magnet insertion hole) is formed in a rotor yoke (rotor core), and a permanent magnet and a prism spacer having a wedge-shaped cross section are inserted into the magnet embedded hole, An IPM motor in which a permanent magnet is fixed in a magnet embedding hole is disclosed (Patent Document 1, FIG. 1). The prism spacer is basically a “wedge”, and the action of the “wedge” presses the permanent magnet against the inner surface of the magnet insertion hole. The prism spacer is fixed to the magnet insertion hole with resin.

しかし、特許文献1に記載の発明においては、磁石埋込孔に永久磁石を挿入した後で、角柱スペーサを磁石埋込孔に挿入して、さらに永久磁石を内側面に押し付ける方向(つまり「楔」を打ち込む方向)に角柱スペーサをスライドさせる必要がある(特許文献1,図7)。回転子には多数の磁石埋込孔があって、その多数の磁石埋込孔のそれぞれに角柱スペーサを挿入する必要があるから、角柱スペーサの挿入とスライドには大きな手数が掛かる。また、角柱スペーサのスライドには微妙な力加減が必要とされる。力が小さければ、永久磁石を固定することができないし、力が大きすぎれば、ロータヨーク等を破損するからである。そのため、回転子の組み立てには熟練した作業者を当てる必要がある。   However, in the invention described in Patent Document 1, after inserting the permanent magnet into the magnet embedding hole, the prismatic spacer is inserted into the magnet embedding hole, and the permanent magnet is further pressed against the inner surface (that is, “wedge”). It is necessary to slide the prism spacer in the direction in which "" is driven (Patent Document 1, FIG. 7). Since the rotor has a large number of magnet embedding holes, and it is necessary to insert a prismatic spacer into each of the large number of magnet embedding holes, it takes a lot of work to insert and slide the prismatic spacer. Further, a delicate force adjustment is required for the slide of the prism spacer. This is because if the force is small, the permanent magnet cannot be fixed, and if the force is too large, the rotor yoke or the like is damaged. Therefore, it is necessary to apply a skilled worker to the assembly of the rotor.

「楔」に代えて、永久磁石を樹脂モールドして回転子コアに固定することも知られている。例えば、特許文献2には、複数の永久磁石を回転子コア(ロータヨーク)の表面に配置して樹脂モールドで固定したモータが開示されている(特許文献2、図1)。樹脂モールドによる固定は、「楔」による締結に比べて自動化が容易であるが、樹脂モールドを成形する前に、永久磁石とロータヨークを仮固定する必要がある(特許文献2、第0030段落)。また、仮固定には専用治具を必要とすると考えられる。   It is also known that a permanent magnet is resin-molded and fixed to the rotor core instead of the “wedge”. For example, Patent Document 2 discloses a motor in which a plurality of permanent magnets are arranged on the surface of a rotor core (rotor yoke) and fixed with a resin mold (Patent Document 2, FIG. 1). The fixing by the resin mold is easier to automate than the fastening by the “wedge”, but it is necessary to temporarily fix the permanent magnet and the rotor yoke before forming the resin mold (Patent Document 2, paragraph 0030). Further, it is considered that a special jig is required for temporary fixing.

また、樹脂を使用して永久磁石を回転子コアに固定する方法であって、専用治具を必要としない方法も提案されている。例えば、特許文献3には、磁石収容孔(磁石挿入孔)に溶融樹脂を加圧注入して、永久磁石を磁石収容孔の外径側または内径側に押圧しながら、永久磁石を磁石収容孔内に固定することが開示されている。   In addition, a method of fixing a permanent magnet to a rotor core using a resin and not requiring a dedicated jig has been proposed. For example, in Patent Document 3, molten resin is pressurized and injected into a magnet accommodation hole (magnet insertion hole), and the permanent magnet is pressed against the outer diameter side or inner diameter side of the magnet accommodation hole while the permanent magnet is inserted into the magnet accommodation hole. It is disclosed to fix in.

特許第5126487号公報Japanese Patent No. 5126487 特開2001−298887号公報JP 2001-298877 A 特開2007−215301号公報JP 2007-215301 A

特許文献3に記載の発明によれば、溶融樹脂の圧力によって永久磁石を磁石収容孔の内面に押し付けるので、永久磁石を回転子コアに正確に位置決めすることができる。また、位置決めのための専用治具等は必要としない。   According to the invention described in Patent Document 3, since the permanent magnet is pressed against the inner surface of the magnet housing hole by the pressure of the molten resin, the permanent magnet can be accurately positioned on the rotor core. Further, a dedicated jig for positioning is not required.

しかしながら、特許文献3に記載の発明においては、樹脂を注入する前に、磁石を磁石収容孔のほぼ中央に配置する必要がある(特許文献3、第0041段落、図8)。仮に、磁石を磁石収容孔の磁石挿入孔の内側に寄った位置(ロータシャフトに寄った位置)に置くと、磁石は磁石挿入孔の内側に寄った位置で固定されてしまう。また、磁石は磁石収容孔内で正立させる必要がある。磁石が磁石収容孔内で傾いていたら、傾いた状態のまま固定されるからである。そのため、特許文献3に記載の発明では、磁石の位置決め精度が作業者の技量に依存していると言える。つまり、製品の性質が作業者の技量によって変動するという問題がある。   However, in the invention described in Patent Document 3, it is necessary to dispose the magnet substantially at the center of the magnet accommodation hole before injecting the resin (Patent Document 3, paragraph 0041, FIG. 8). If the magnet is placed at a position close to the inside of the magnet insertion hole of the magnet accommodation hole (position close to the rotor shaft), the magnet is fixed at a position close to the inside of the magnet insertion hole. Moreover, it is necessary to erect the magnet in the magnet housing hole. This is because if the magnet is tilted in the magnet housing hole, the magnet is fixed in a tilted state. Therefore, in the invention described in Patent Document 3, it can be said that the positioning accuracy of the magnet depends on the skill of the operator. That is, there is a problem that the nature of the product varies depending on the skill of the worker.

本発明は、このような事情に鑑みてなされたものであり、作業者の技量に関係なしに、永久磁石を正確に位置決めすることができる回転子の製造方法を提供することを目的とする。また、永久磁石が正確に位置決めされた回転子を提供することを目的とする。   The present invention has been made in view of such circumstances, and an object of the present invention is to provide a method of manufacturing a rotor that can accurately position a permanent magnet regardless of the skill of an operator. It is another object of the present invention to provide a rotor in which permanent magnets are accurately positioned.

上記課題を解決するために、本発明の第1の観点に係る回転子の製造方法は、回転子コアに形成された磁石挿入孔に永久磁石を挿入して、前記永久磁石を前記回転子コアに固定する回転子の製造方法であって、前記磁石挿入孔に挿入嵌合される位置決め部材を介して、前記永久磁石を位置決めして前記回転子コアに結合して、前記磁石挿入孔に樹脂材料を注入して、前記磁石挿入孔と前記永久磁石の間の隙間に充填させて、その後、硬化させることを特徴とするものである。   In order to solve the above-described problem, a method of manufacturing a rotor according to a first aspect of the present invention includes inserting a permanent magnet into a magnet insertion hole formed in a rotor core, and inserting the permanent magnet into the rotor core. A method of manufacturing a rotor that is fixed to a magnet, wherein the permanent magnet is positioned and coupled to the rotor core via a positioning member that is inserted and fitted into the magnet insertion hole, and the magnet insertion hole is made of resin. The material is injected, filled in the gap between the magnet insertion hole and the permanent magnet, and then cured.

本発明に係る回転子の製造方法は、前記回転子コアの一方端から前記磁石挿入孔に位置決め部材を挿入して、前記回転子コアに結合する位置決め部材結合工程と、前記回転子コアの他方端から前記磁石挿入孔に前記永久磁石を挿入し、先に固定された前記位置決め部材と嵌合させて、前記永久磁石を前記回転子コアに結合する永久磁石結合工程と、前記磁石挿入孔に樹脂材料を注入して、前記磁石挿入孔と前記永久磁石の間の隙間に充填させて、その後、硬化させる充填硬化工程とを、有するものであっても良い。   The method of manufacturing a rotor according to the present invention includes a positioning member coupling step of inserting a positioning member into the magnet insertion hole from one end of the rotor core and coupling to the rotor core, and the other of the rotor cores. A permanent magnet coupling step of inserting the permanent magnet into the magnet insertion hole from the end and fitting the permanent magnet to the rotor core, and fitting the permanent magnet into the rotor core; You may have a filling hardening process which inject | pours a resin material, fills the clearance gap between the said magnet insertion hole and the said permanent magnet, and makes it harden | cure after that.

本発明に係る回転子の製造方法は、前記永久磁石を位置決め部材と嵌合させて互いに結合する事前組立工程と、互いに結合された前記永久磁石と前記位置決め部材の組を前記回転子コアの一方端から前記磁石挿入孔に挿入して、前記位置決め部材を前記磁石挿入孔に嵌合させて、前記永久磁石を前記回転子コアに結合する永久磁石結合工程と、前記磁石挿入孔に樹脂材料を注入して、前記磁石挿入孔と前記永久磁石の間の隙間に充填させて、その後、硬化させる充填硬化工程とを、有するものであっても良い。   The method of manufacturing a rotor according to the present invention includes a pre-assembly step of fitting the permanent magnet with a positioning member to couple each other, and combining the permanent magnet and the positioning member coupled to each other into one of the rotor cores. A permanent magnet coupling step of inserting the positioning member into the magnet insertion hole and coupling the permanent magnet to the rotor core; and a resin material in the magnet insertion hole. It may have a filling and curing step of injecting and filling the gap between the magnet insertion hole and the permanent magnet and then curing.

本発明に係る回転子の製造方法は、前記永久磁石を回転子コアの前記磁石挿入孔に挿入する永久磁石挿入工程と、位置決め部材を前記磁石挿入孔に挿入して、前記回転子コアに結合するとともに、先に前記磁石挿入孔に挿入された前記永久磁石を前記位置決め部材と嵌合させて、前記永久磁石を前記回転子コアに結合する永久磁石結合工程と、前記磁石挿入孔に樹脂材料を注入して、前記磁石挿入孔と前記永久磁石の間の隙間に充填させて、その後、硬化させる充填硬化工程とを、有するものであっても良い。   The rotor manufacturing method according to the present invention includes a permanent magnet insertion step of inserting the permanent magnet into the magnet insertion hole of the rotor core, and a positioning member inserted into the magnet insertion hole and coupled to the rotor core. In addition, a permanent magnet coupling step for coupling the permanent magnet to the rotor core by fitting the permanent magnet previously inserted into the magnet insertion hole with the positioning member, and a resin material for the magnet insertion hole And a filling and curing step of filling the gap between the magnet insertion hole and the permanent magnet and then curing.

本発明に係る回転子の製造方法は、前記永久磁石結合工程の完了後に、前記磁石挿入孔の前記位置決め部材が嵌合されていない端部から、別の位置決め部材を挿入して、前記回転子コアに結合するとともに、前記永久磁石を前記別の位置決め部材と嵌合させるものであっても良い。   In the rotor manufacturing method according to the present invention, after the permanent magnet coupling step is completed, another positioning member is inserted from the end of the magnet insertion hole where the positioning member is not fitted, and the rotor The permanent magnet may be fitted to the another positioning member while being coupled to the core.

前記位置決め部材は前記樹脂材料と同種の樹脂、あるいは同一の樹脂で成形されても良い。なお、本発明において「同種の樹脂」とは、例えば樹脂材料がエポキシ系樹脂である場合に、位置決め部材もエポキシ系樹脂で成形されていることを言う。また、「同一の樹脂」とは、樹脂材料と位置決め部材の素材の成分組成が全く同一であることを言う。   The positioning member may be formed of the same kind of resin as the resin material or the same resin. In the present invention, “the same kind of resin” means that, for example, when the resin material is an epoxy resin, the positioning member is also formed of the epoxy resin. Further, “the same resin” means that the component composition of the resin material and the positioning member is exactly the same.

本発明の第2の観点に係る回転子は、永久磁石を備える回転子であって、磁石挿入孔が
形成された回転子コアと、前記磁石挿入孔の内部に配置された永久磁石と、前記回転子コ
アの一方端にあって、前記磁石挿入孔に嵌合されている位置決め部材を備え、前記位置決め部材の前記磁石挿入孔に挿入される部位の長さは、前記磁石挿入孔の前記回転子コアを貫通する方向の長さよりも短くされ、前記永久磁石は、前記磁石挿入孔の内部において、前記位置決め部材と嵌合されていて、前記磁石挿入孔と前記永久磁石の間の隙間には、樹脂材料が充填されていることを特徴とする。

A rotor according to a second aspect of the present invention is a rotor including a permanent magnet, wherein a rotor core in which a magnet insertion hole is formed, a permanent magnet disposed inside the magnet insertion hole, A positioning member is provided at one end of the rotor core and fitted in the magnet insertion hole, and the length of the portion inserted into the magnet insertion hole of the positioning member is the rotation of the magnet insertion hole. The permanent magnet is fitted to the positioning member inside the magnet insertion hole, and the gap between the magnet insertion hole and the permanent magnet is in the gap between the magnet insertion hole and the permanent magnet. The resin material is filled.

本発明によれば、位置決め部材は磁石挿入孔と嵌合して正規の位置に位置決めされ、永久磁石は、その位置決め部材と嵌合するので正規の位置に位置決めされる。そのため、永久磁石の位置決め精度は作業者の技量に依存しない。つまり、誰が作業しても、永久磁石を磁石挿入孔に対して正確に位置決めすることができるから、回転子の品質を高いレベルで安定させることができる。   According to the present invention, the positioning member is fitted into the magnet insertion hole and positioned at a normal position, and the permanent magnet is fitted into the positioning member, and thus is positioned at the normal position. Therefore, the positioning accuracy of the permanent magnet does not depend on the skill of the operator. In other words, no matter who works, the permanent magnet can be accurately positioned with respect to the magnet insertion hole, so that the quality of the rotor can be stabilized at a high level.

また、本発明に係る製造方法は、特別な治具等を必要としないので、従来の樹脂注入装置等をそのまま使用することができる。そのため、自動化が容易である。   Moreover, since the manufacturing method according to the present invention does not require a special jig or the like, a conventional resin injection device or the like can be used as it is. Therefore, automation is easy.

また、位置決め部材を樹脂材料と同種の樹脂で成形すれば、位置決め部材に対する樹脂材料の「なじみ」が良いので、樹脂材料は位置決め部材に対して接着剤として作用する。同種の樹脂であれば、熱膨張係数も同等なので、製造中または使用中の温度変化による膨張、収縮に差異がなく、位置決め部材と樹脂材料が剥離することもない。そのため、位置決め部材は回転子コアに確実に保持される。また、位置決め部材を樹脂材料と同一の樹脂で成形すれば、位置決め部材は回転子コアにさらに確実に保持される。   Further, if the positioning member is formed of the same kind of resin as the resin material, the “familiarity” of the resin material to the positioning member is good, and the resin material acts as an adhesive on the positioning member. Since the thermal expansion coefficients are the same for the same type of resin, there is no difference in expansion and contraction due to temperature changes during manufacture or use, and the positioning member and the resin material do not peel off. Therefore, the positioning member is securely held by the rotor core. Further, if the positioning member is formed of the same resin as the resin material, the positioning member is more reliably held on the rotor core.

本発明の実施形態に係る電動機を回転軸に垂直な平面で切断した平断面図である。It is the plane sectional view which cut the electric motor concerning the embodiment of the present invention by the plane perpendicular to the axis of rotation. 本発明の実施形態に係る回転子を電動機の回転軸を含む平面で切断した縦断面図である。It is the longitudinal cross-sectional view which cut | disconnected the rotor which concerns on embodiment of this invention by the plane containing the rotating shaft of an electric motor. 位置決め部材の外形を示す斜視図である。It is a perspective view which shows the external shape of a positioning member. 回転子の製造方法を示す説明図であって、(a)〜(c)は製造過程を時系列に沿って示している。It is explanatory drawing which shows the manufacturing method of a rotor, Comprising: (a)-(c) has shown the manufacture process along the time series. 永久磁石と位置決め部材の外形を示す斜視図である。It is a perspective view which shows the external shape of a permanent magnet and a positioning member. 回転子の変形例を示す縦断面図である。It is a longitudinal cross-sectional view which shows the modification of a rotor. 位置決め部材の変形例を示す斜視図であって、(a)〜(e)は各変形例を示す。It is a perspective view which shows the modification of a positioning member, Comprising: (a)-(e) shows each modification. 位置決め部材の変形例を示す斜視図であって、(a)、(b)は各変形例を示す。It is a perspective view which shows the modification of a positioning member, Comprising: (a), (b) shows each modification.

以下、本発明に係る回転子の製造方法及び回転子の実施形態について、図を参照して説明する。なお、ここでは電動機の回転子を例に挙げて説明する。   Hereinafter, a rotor manufacturing method and a rotor embodiment according to the present invention will be described with reference to the drawings. Here, the explanation will be made by taking the rotor of the electric motor as an example.

図1に示すように、本発明の実施形態に係る電動機1は、固定子2と回転子3を備えている。固定子2は複数のティース5を備えていて、各ティース5には巻き線6が巻き回されている。回転子3は回転軸4を介して、図示しないブラケットに回転自在に支持されていて、回転中心X回りに自在に回転する。また、回転子3は回転子コア7と複数の永久磁石8とから構成されている。永久磁石8は回転子コア7に形成された複数の磁石挿入孔9のそれぞれに挿入されている。   As shown in FIG. 1, an electric motor 1 according to an embodiment of the present invention includes a stator 2 and a rotor 3. The stator 2 includes a plurality of teeth 5, and a winding 6 is wound around each tooth 5. The rotor 3 is rotatably supported by a bracket (not shown) via the rotation shaft 4 and rotates freely around the rotation center X. The rotor 3 is composed of a rotor core 7 and a plurality of permanent magnets 8. The permanent magnet 8 is inserted into each of a plurality of magnet insertion holes 9 formed in the rotor core 7.

図2は、回転子3を回転軸4の回転中心Xを含む平面で切断した、つまり図1のA−A線で切断した断面図であって、多少模式化した縦断面図である。図2から明らかなように、回転子コア7は多数の電磁鋼板10を積層して構成されている。なお、各電磁鋼板10には打ち抜き加工によって、同形の透孔が形成されていて、電磁鋼板10は前記透孔を同じ位置に合わせて積層されている。その結果、回転子コア7には磁石挿入孔9が形成され、磁石挿入孔9は回転子コア7を上下に貫通している。また、磁石挿入孔9の下端部には、位置決め部材11があって、位置決め部材11は回転子コア7の下面から磁石挿入孔9に挿入されて、磁石挿入孔9と嵌合している。図2に示すように、位置決め部材11の下面は回転子コア7の下面と同じ高さに揃えられている。永久磁石8は回転子コア7の上面から磁石挿入孔9に挿入され、磁石挿入孔9の下部において、位置決め部材11と嵌合している。また、樹脂材料13が、磁石挿入孔9と永久磁石8の間の隙間に充填されていて、永久磁石8を磁石挿入孔9の中に固定している。   2 is a cross-sectional view of the rotor 3 cut along a plane including the rotation center X of the rotary shaft 4, that is, a cross-sectional view taken along the line AA in FIG. As apparent from FIG. 2, the rotor core 7 is formed by laminating a number of electromagnetic steel plates 10. The electromagnetic steel plates 10 are formed with the same shape of through holes by punching, and the electromagnetic steel plates 10 are laminated with the through holes in the same position. As a result, a magnet insertion hole 9 is formed in the rotor core 7, and the magnet insertion hole 9 penetrates the rotor core 7 up and down. A positioning member 11 is provided at the lower end portion of the magnet insertion hole 9, and the positioning member 11 is inserted into the magnet insertion hole 9 from the lower surface of the rotor core 7 and is fitted to the magnet insertion hole 9. As shown in FIG. 2, the lower surface of the positioning member 11 is aligned with the same height as the lower surface of the rotor core 7. The permanent magnet 8 is inserted into the magnet insertion hole 9 from the upper surface of the rotor core 7 and is fitted to the positioning member 11 at the lower part of the magnet insertion hole 9. Further, the resin material 13 is filled in the gap between the magnet insertion hole 9 and the permanent magnet 8, and the permanent magnet 8 is fixed in the magnet insertion hole 9.

図3は位置決め部材11の外形を示す斜視図である。位置決め部材11の平面形は磁石挿入孔9の断面形(図1に現れる形状)と実質的に同一にされていて、位置決め部材11を磁石挿入孔9に嵌合させると、位置決め部材11は回転子コア7に対して、水平方向において所定の位置に位置決めされる。なお、高さ方向の位置決めは位置決め部材11の下面を回転子コア7の下面と同じ高さに揃えることによってなされる。また、位置決め部材11の上面には凹所12があって、凹所12の内面は永久磁石8が嵌合する形状寸法を有している。そのため、永久磁石8を凹所12に挿入して嵌合させると、永久磁石8は位置決め部材11に対して、水平方向において所定の位置に位置決めされる。また、凹所12の底面は位置決め部材11から所定の高さになるように設計されている。そのため、永久磁石8を凹所12の底面に当たるまで挿入すれば、永久磁石8は、高さ方向においても、位置決め部材11の底面に対して所定の位置に位置決めされる。その結果、永久磁石8は、水平方向及び高さ方向において、回転子コア7に対して、所定の位置に位置決めされる。   FIG. 3 is a perspective view showing the outer shape of the positioning member 11. The planar shape of the positioning member 11 is substantially the same as the cross-sectional shape of the magnet insertion hole 9 (the shape appearing in FIG. 1). When the positioning member 11 is fitted into the magnet insertion hole 9, the positioning member 11 rotates. The child core 7 is positioned at a predetermined position in the horizontal direction. The positioning in the height direction is performed by aligning the lower surface of the positioning member 11 with the same height as the lower surface of the rotor core 7. Further, the positioning member 11 has a recess 12 on the upper surface, and the inner surface of the recess 12 has a shape and dimension to which the permanent magnet 8 is fitted. Therefore, when the permanent magnet 8 is inserted into the recess 12 and fitted, the permanent magnet 8 is positioned at a predetermined position in the horizontal direction with respect to the positioning member 11. Further, the bottom surface of the recess 12 is designed to have a predetermined height from the positioning member 11. Therefore, if the permanent magnet 8 is inserted until it hits the bottom surface of the recess 12, the permanent magnet 8 is positioned at a predetermined position with respect to the bottom surface of the positioning member 11 even in the height direction. As a result, the permanent magnet 8 is positioned at a predetermined position with respect to the rotor core 7 in the horizontal direction and the height direction.

位置決め部材11の素材は、特に限定されない。ただし、樹脂材料13と同種の樹脂で成形するのが望ましい。例えば、樹脂材料13がエポキシ系樹脂である場合に、位置決め部材11もエポキシ系樹脂で成形するようにすると、位置決め部材11に対する樹脂材料13の「なじみ」が良いので、樹脂材料13は位置決め部材11に対して接着剤として機能する。そのため、位置決め部材11が回転子コア7に確実に固定される。また、位置決め部材11の素材と樹脂材料13の成分組成を全く同一にすれば、さらに確実に固定される。   The material of the positioning member 11 is not particularly limited. However, it is desirable to mold with the same kind of resin as the resin material 13. For example, when the resin material 13 is an epoxy resin, if the positioning member 11 is also formed of an epoxy resin, the “familiarity” of the resin material 13 with respect to the positioning member 11 is good. Functions as an adhesive. Therefore, the positioning member 11 is securely fixed to the rotor core 7. Moreover, if the raw material of the positioning member 11 and the component composition of the resin material 13 are made completely the same, the fixing is further ensured.

さて、回転子コア7への永久磁石8の固定は、事前に製造された回転子コア7、永久磁石8及び位置決め部材11を、以下に示す手順で、組み立てることによって行われる。最初に、位置決め部材結合工程を実施する。すなわち、回転子コア7の下面から磁石挿入孔9に位置決め部材11を挿入して、位置決め部材11を磁石挿入孔9に嵌合させて、図4(a)に示すような状態まで組み立てる。前述したように、位置決め部材11は、その外形において、磁石挿入孔9に嵌合する形状寸法を有しているので、磁石挿入孔9と嵌合した位置決め部材11は、水平方向において、回転子コア7の所定の位置に正確に位置決めされる。なお、高さ方向の位置決め、つまり、回転子コア7の下面と位置決め部材11の下面の高さ揃えは、例えば、回転子コア7の下面と位置決め部材11下面を定盤に宛がって行えば良い。   Now, fixing of the permanent magnet 8 to the rotor core 7 is performed by assembling the rotor core 7, the permanent magnet 8 and the positioning member 11 manufactured in advance according to the following procedure. First, a positioning member coupling step is performed. That is, the positioning member 11 is inserted into the magnet insertion hole 9 from the lower surface of the rotor core 7 and the positioning member 11 is fitted into the magnet insertion hole 9 to be assembled to the state shown in FIG. As described above, the positioning member 11 has a shape that fits into the magnet insertion hole 9 in its outer shape. Therefore, the positioning member 11 fitted into the magnet insertion hole 9 is a rotor in the horizontal direction. The core 7 is accurately positioned at a predetermined position. The positioning in the height direction, that is, the alignment of the lower surface of the rotor core 7 and the lower surface of the positioning member 11 is performed, for example, by placing the lower surface of the rotor core 7 and the lower surface of the positioning member 11 on the surface plate. Just do it.

位置決め部材11を磁石挿入孔9と嵌合させて、回転子コア7と結合したら、永久磁石結合工程を実行する。すなわち、回転子コア7の上面から磁石挿入孔9に永久磁石8を挿入して、磁石挿入孔9の下部において、位置決め部材11と嵌合させて、永久磁石8を位置決め部材11の凹所12の底面に当たるまで押し込んで、永久磁石8を回転子コア7と結合する。つまり、図4(b)に示すような状態まで組み立てる。前述したように、位置決め部材11の凹所12の内面は永久磁石8が嵌合する形状寸法を有しているので、位置決め部材11と嵌合した永久磁石8は水平方向において、回転子コア7の所定の位置に正確に位置決めされる。また、高さ方向の位置決めは、永久磁石8を位置決め部材11の凹所12の底面に当てることによってなされる。   When the positioning member 11 is fitted to the magnet insertion hole 9 and coupled to the rotor core 7, a permanent magnet coupling step is executed. That is, the permanent magnet 8 is inserted into the magnet insertion hole 9 from the upper surface of the rotor core 7 and is fitted to the positioning member 11 at the lower part of the magnet insertion hole 9, so that the permanent magnet 8 is inserted into the recess 12 of the positioning member 11. The permanent magnet 8 is coupled to the rotor core 7 until it hits the bottom surface of the rotor core 7. That is, it assembles to a state as shown in FIG. As described above, since the inner surface of the recess 12 of the positioning member 11 has a shape and dimension in which the permanent magnet 8 is fitted, the permanent magnet 8 fitted with the positioning member 11 is in the horizontal direction in the rotor core 7. Is accurately positioned at a predetermined position. Further, the positioning in the height direction is performed by applying the permanent magnet 8 to the bottom surface of the recess 12 of the positioning member 11.

最後に、充填硬化工程を実施する。すなわち、回転子コア7の上面から磁石挿入孔9に樹脂材料13を加圧注入して、図4(c)に示すように、磁石挿入孔9と永久磁石8の間の隙間に樹脂材料13を充填する。なお、図4(c)は充填硬化工程の途中の状態を示している。樹脂材料13は、さらに、その液面が回転子コア7の上面と同じ高さになるまで注入される。つまり図2の状態になるまで注入される。その後、樹脂材料13が熱硬化性樹脂ならば樹脂材料13を加温し、樹脂材料13が熱可塑性樹脂ならば樹脂材料13を冷却して、樹脂材料13を硬化させる。樹脂材料13が硬化すれば、永久磁石8の固定は完了する。なお、充填硬化工程では回転子コア7を図示しない上型と下型の間に挟んで、回転子コア7を押圧して行うが、前記上型と下型、押圧装置、及び樹脂材料13を加圧注入する装置及び製造方法は公知であるので、図示と説明を省略している。必要ならば、特許文献2、あるいは特許第3786946号公報等を参照されたい。   Finally, a filling and curing step is performed. That is, the resin material 13 is pressurized and injected from the upper surface of the rotor core 7 into the magnet insertion hole 9, and the resin material 13 is inserted into the gap between the magnet insertion hole 9 and the permanent magnet 8 as shown in FIG. Fill. In addition, FIG.4 (c) has shown the state in the middle of the filling hardening process. The resin material 13 is further injected until the liquid level becomes the same height as the upper surface of the rotor core 7. That is, the injection is performed until the state shown in FIG. Thereafter, if the resin material 13 is a thermosetting resin, the resin material 13 is heated. If the resin material 13 is a thermoplastic resin, the resin material 13 is cooled to cure the resin material 13. When the resin material 13 is cured, the fixing of the permanent magnet 8 is completed. In the filling and curing step, the rotor core 7 is sandwiched between an upper mold and a lower mold (not shown) and the rotor core 7 is pressed. The upper mold and the lower mold, the pressing device, and the resin material 13 are Since an apparatus and a manufacturing method for pressure injection are known, illustration and description are omitted. If necessary, refer to Patent Document 2 or Japanese Patent No. 3786946.

なお、上記においては、位置決め部材結合工程において、回転子コア7と位置決め部材11を先に結合して、その後、永久磁石結合工程において、回転子コア7に結合された位置決め部材11に永久磁石8を嵌合させて、永久磁石8と回転子コア7を結合する方法を示した。これに代えて、事前組立工程において、永久磁石8及び位置決め部材11を回転子コア7に結合する前に、永久磁石8を位置決め部材11に嵌合させて、例えば、図5に示すような永久磁石8と位置決め部材11の組14を作って、その後、永久磁石結合工程において、永久磁石8を位置決め部材11の組14を磁石挿入孔9に挿入して、位置決め部材11を磁石挿入孔9に嵌合させて、永久磁石8を回転子コア7に結合するようにしても良い。   In the above, in the positioning member coupling step, the rotor core 7 and the positioning member 11 are coupled first, and then in the permanent magnet coupling step, the permanent magnet 8 is attached to the positioning member 11 coupled to the rotor core 7. A method of coupling the permanent magnet 8 and the rotor core 7 by fitting them. Instead, in the pre-assembly process, before the permanent magnet 8 and the positioning member 11 are coupled to the rotor core 7, the permanent magnet 8 is fitted to the positioning member 11, for example, as shown in FIG. A set 14 of the magnet 8 and the positioning member 11 is made. Thereafter, in the permanent magnet coupling step, the set 14 of the positioning member 11 is inserted into the magnet insertion hole 9 and the positioning member 11 is inserted into the magnet insertion hole 9 in the permanent magnet coupling step. The permanent magnet 8 may be coupled to the rotor core 7 by fitting.

あるいは、位置決め部材11を磁石挿入孔9に挿入・嵌合する前に、永久磁石8を磁石挿入孔9に挿入する永久磁石挿入工程を実行して、その後に位置決め部材11を磁石挿入孔8に挿入・嵌合しても良い。この場合、永久磁石結合工程は、先に磁石挿入孔9に挿入された永久磁石8を、後から磁石挿入孔9に挿入された位置決め部材11と嵌合させて、永久磁石8を回転子コア7に結合して行われる。この時、位置決め部材11を挿入する磁石挿入孔9の端部は、永久磁石8を挿入した端部であっても、その反対側の端部であっても良い。   Alternatively, before the positioning member 11 is inserted / fitted into the magnet insertion hole 9, a permanent magnet insertion step of inserting the permanent magnet 8 into the magnet insertion hole 9 is performed, and then the positioning member 11 is inserted into the magnet insertion hole 8. It may be inserted and fitted. In this case, in the permanent magnet coupling step, the permanent magnet 8 previously inserted into the magnet insertion hole 9 is fitted with the positioning member 11 inserted into the magnet insertion hole 9 later, and the permanent magnet 8 is inserted into the rotor core. 7 is performed. At this time, the end portion of the magnet insertion hole 9 into which the positioning member 11 is inserted may be the end portion into which the permanent magnet 8 is inserted or the opposite end portion.

また、前述した永久磁石結合工程を実行した後で、磁石挿入孔9の位置決め部材11が嵌合されていない端部から、別の位置決め部材11を磁石挿入孔9に挿入して、回転子コア7に結合するとともに、永久磁石8を前記別の位置決め部材11と嵌合させるようにしても良い。つまり図6に示すように、磁石挿入孔9の上端と下端のそれぞれに、位置決め部材11を挿入・嵌合させて、永久磁石8の両端が位置決め部材11と嵌合するようにしても良い。   Moreover, after performing the permanent magnet coupling | bonding process mentioned above, another positioning member 11 is inserted in the magnet insertion hole 9 from the edge part in which the positioning member 11 of the magnet insertion hole 9 is not fitted, and a rotor core is inserted. 7 and the permanent magnet 8 may be fitted to the another positioning member 11. That is, as shown in FIG. 6, the positioning member 11 may be inserted and fitted into each of the upper end and the lower end of the magnet insertion hole 9 so that both ends of the permanent magnet 8 are fitted with the positioning member 11.

また、位置決め部材11の形状は、図3に示したものには限定されない。例えば、永久磁石8を磁石挿入孔9の内側又は外側にオフセットして配置したい場合には、図7(a)に示すような位置決め部材11を使用すれば良い。また、内側又は外側方向のオフセットに加えて、永久磁石8の平断面形(つまり図1に現れる断面形状)の長手方向にオフセットして配置したい場合には、図7(b)に示すような位置決め部材11を使用すれば良い。また、位置決め部材11の寸法及び形状は磁石挿入孔9と嵌合するようなものであれば十分であり、磁石挿入孔9の全体を塞ぐような寸法及び形状を備える必要はない。したがって、位置決め部材11は、例えば、図7(c)に示すように、磁石挿入孔9の平断面形(つまり図1に現れる断面形状)の長手方向の長さに比べて短いものであっても良い。位置決め部材11は、底部がない形状であっても良い。つまり、図7(d)や、図7(e)に示すような、フレームだけがあって、中央部が上下に突き抜けた形状であっても良い。このような形状を選ぶと、永久磁石8と位置決め部材11の嵌合具合を回転子コア7の外側から視認することができる。また、先に位置決め部材11を先に磁石挿入孔9を挿入・嵌合させて、位置決め部材11の中央部の開口を通して永久磁石8を挿入することができる。なお、図7(c)に示した位置決め部材11を使用する場合は、位置決め部材11の磁石挿入孔9の長手方向への移動を拘束するような形状(例えば、突起あるいは段差)を磁石挿入孔9に備えれば良い。   Further, the shape of the positioning member 11 is not limited to that shown in FIG. For example, when it is desired to place the permanent magnet 8 offset inside or outside the magnet insertion hole 9, a positioning member 11 as shown in FIG. Further, in addition to the offset in the inner or outer direction, in the case where it is desired to be offset in the longitudinal direction of the flat sectional shape of the permanent magnet 8 (that is, the sectional shape appearing in FIG. 1), as shown in FIG. The positioning member 11 may be used. Moreover, the dimension and shape of the positioning member 11 are sufficient as long as they can be fitted into the magnet insertion hole 9, and it is not necessary to have a dimension and shape that block the entire magnet insertion hole 9. Therefore, for example, as shown in FIG. 7C, the positioning member 11 is shorter than the length in the longitudinal direction of the flat cross-sectional shape of the magnet insertion hole 9 (that is, the cross-sectional shape appearing in FIG. 1). Also good. The positioning member 11 may have a shape without a bottom. That is, as shown in FIG. 7 (d) or FIG. 7 (e), there may be a shape in which only the frame is provided and the central portion penetrates vertically. When such a shape is selected, the degree of fitting between the permanent magnet 8 and the positioning member 11 can be viewed from the outside of the rotor core 7. Further, the permanent magnet 8 can be inserted through the opening at the center of the positioning member 11 by first inserting and fitting the magnet insertion hole 9 with the positioning member 11 first. When the positioning member 11 shown in FIG. 7C is used, the magnet insertion hole has a shape (for example, a protrusion or a step) that restricts the movement of the positioning member 11 in the longitudinal direction of the magnet insertion hole 9. 9 is sufficient.

また、各磁石挿入孔9に挿入される永久磁石8は1個とは限らない。永久磁石8を複数個に分割して、複数個の永久磁石8を1個の磁石挿入孔9に挿入して、位置決め部材11と嵌合させるようにしても良い。つまり、例えば、図5に示すように、1個の位置決め部材11に複数個の永久磁石8を嵌合させるようにしても良い。   Further, the number of permanent magnets 8 inserted into each magnet insertion hole 9 is not limited to one. The permanent magnet 8 may be divided into a plurality of pieces, and the plurality of permanent magnets 8 may be inserted into one magnet insertion hole 9 and fitted with the positioning member 11. That is, for example, as shown in FIG. 5, a plurality of permanent magnets 8 may be fitted to one positioning member 11.

なお、本発明において、「嵌合」は「緩みや、隙間が全くない状態で嵌め合わされた状態」には、限定されない。「嵌合」は、より広義に解釈されるべきである。永久磁石について要求される位置決め精度の範囲内で、多少の緩みや遊びがあっても、本発明の目的は達成されるから、多少の緩みや遊びがあっても、「嵌合」に該当する。   In the present invention, “fitting” is not limited to “a state in which the fitting is performed without any looseness or gaps”. “Mating” should be interpreted more broadly. Even if there is some looseness and play within the range of positioning accuracy required for the permanent magnet, the object of the present invention can be achieved, so even if there is some looseness and play, it falls under “fitting”. .

また、上記の実施形態は本発明の具体的実施態様を例示するものであって、本発明の技術的範囲を画すものではない。本発明は特許請求の範囲に記述された技術的思想の限りにおいて、自由に変形、応用あるいは改良して実施することができる。   Moreover, said embodiment illustrates the specific embodiment of this invention, Comprising: The technical scope of this invention is not demarcated. The present invention can be freely modified, applied or improved within the scope of the technical idea described in the claims.

例えば、上記実施形態において、位置決め部材11を回転子コア7の下面から磁石挿入孔9に挿入し、永久磁石8を回転子コア7の上面から磁石挿入孔9に挿入する例を示したが、その逆であっても良い。つまり、位置決め部材11を回転子コア7の上面から挿入し、永久磁石8を回転子コア7の下面から挿入するようにしても良い。また、上記実施形態においては、樹脂材料13を回転子コア7の上面から加圧注入する例を示したが、回転子コア7の下面から加圧注入するようにしても良い。なお、「上面」及び「下面」は回転子コア7の「一方端」と「他方端」の例示であって、回転子コア7を図2または図4に示す状態に置いたときの上下関係に基づく表現である。つまり、回転子コア7を反転させれば、「上面」及び「下面」が入れ替わるし、横転させれば、「左端面」あるいは「右端面」が「一方端」あるいは「他方端」になる。   For example, in the above embodiment, the positioning member 11 is inserted into the magnet insertion hole 9 from the lower surface of the rotor core 7 and the permanent magnet 8 is inserted into the magnet insertion hole 9 from the upper surface of the rotor core 7. The reverse is also possible. That is, the positioning member 11 may be inserted from the upper surface of the rotor core 7 and the permanent magnet 8 may be inserted from the lower surface of the rotor core 7. Moreover, in the said embodiment, although the example which press-injects the resin material 13 from the upper surface of the rotor core 7 was shown, you may make it press-inject from the lower surface of the rotor core 7. FIG. The “upper surface” and the “lower surface” are examples of “one end” and “the other end” of the rotor core 7, and the vertical relationship when the rotor core 7 is placed in the state shown in FIG. 2 or FIG. 4. It is an expression based on. That is, if the rotor core 7 is reversed, the “upper surface” and the “lower surface” are interchanged, and if the roll is turned over, the “left end surface” or “right end surface” becomes “one end” or “the other end”.

また、永久磁石8と位置決め部材11の組14を磁石挿入孔9に挿入する方向は、回転子コア7の下面からであっても、上面からであってもよい。   The direction in which the set 14 of the permanent magnet 8 and the positioning member 11 is inserted into the magnet insertion hole 9 may be from the lower surface of the rotor core 7 or from the upper surface.

また、上記実施形態において、回転子コア7の位置決め部材11を取り付けた面の反対側の面(図4において、回転子コア7の上面)から、樹脂材料13を注入する例を示したが、これには限定されない。例えば、図7(c)に示すような位置決め部材11を使用すれば、位置決め部材11と磁石挿入孔9の間に隙間が生じるから、該隙間から樹脂材料13を加圧注入することができる。この場合は、回転子コア7の位置決め部材11を取り付けた面(図4において、回転子コア7の下面)から、樹脂材料13を注入することができる。   Moreover, in the said embodiment, although the example which inject | pours the resin material 13 from the surface (in FIG. 4, upper surface of the rotor core 7) on the opposite side to the surface which attached the positioning member 11 of the rotor core 7 was shown, This is not a limitation. For example, if a positioning member 11 as shown in FIG. 7C is used, a gap is formed between the positioning member 11 and the magnet insertion hole 9, so that the resin material 13 can be injected under pressure from the gap. In this case, the resin material 13 can be injected from the surface of the rotor core 7 on which the positioning member 11 is attached (the lower surface of the rotor core 7 in FIG. 4).

また、位置決め部材11の形状及び寸法は、下記の(1)、(2)の機能を満足するような形状及び寸法であれば十分であり、図3、図5あるいは図7に示されたものには限定されない。
(1)磁石挿入孔9と嵌合して、少なくとも充填硬化工程が完了するまでの間は、磁石挿入孔9に対して所定の位置を保持できる。
(2)永久磁石8を嵌合させて、少なくとも充填硬化工程が完了するまでの間は、永久磁石8を所定の位置に保持できる。
In addition, the shape and dimensions of the positioning member 11 are sufficient if they satisfy the following functions (1) and (2), and those shown in FIG. 3, FIG. 5, or FIG. It is not limited to.
(1) A predetermined position can be held with respect to the magnet insertion hole 9 until it is fitted to the magnet insertion hole 9 and at least until the filling and curing step is completed.
(2) The permanent magnet 8 can be held at a predetermined position until the permanent magnet 8 is fitted and at least until the filling and curing step is completed.

また、上記実施形態では、位置決め部材11の下面を回転子コア7の下面と同じ高さに揃えることによって、位置決め部材11を回転子コア7に対する高さ方向の位置決めをする例を示したが、位置決め部材11を高さ方向に位置決めする手段は、これには限らない。例えば図8(a)に示すように、位置決め部材11の側面に位置決めマーク15を描いて、位置決めマーク15と回転子コア7の下面が重なる深さまで、位置決め部材11を磁石挿入孔9に挿入すると、高さ方向に位置決めされるように設計することもできる。あるいは、図8(b)に示すように、位置決め部材11の側面に突起16を設けて、突起16が回転子コア7の下面に当たる深さまで、位置決め部材11を磁石挿入孔9に挿入すると、高さ方向に位置決めされるように設計することもできる。   In the above embodiment, the example in which the positioning member 11 is positioned in the height direction with respect to the rotor core 7 by aligning the lower surface of the positioning member 11 with the same height as the lower surface of the rotor core 7 has been shown. The means for positioning the positioning member 11 in the height direction is not limited to this. For example, as shown in FIG. 8A, when a positioning mark 15 is drawn on the side surface of the positioning member 11 and the positioning member 11 is inserted into the magnet insertion hole 9 to a depth where the positioning mark 15 and the lower surface of the rotor core 7 overlap each other. It can also be designed to be positioned in the height direction. Alternatively, as shown in FIG. 8B, when the protrusion 16 is provided on the side surface of the positioning member 11 and the positioning member 11 is inserted into the magnet insertion hole 9 to a depth where the protrusion 16 hits the lower surface of the rotor core 7, It can also be designed to be positioned in the vertical direction.

樹脂材料13は特定の物質には限定されない。電動機1の用途や使用環境等に応じて適した物質を選択すれば良い。例えば、熱硬化性樹脂を選べば電動機1の運転中に回転子3の温度が上昇しても、樹脂材料13が可塑化することがないから、永久磁石8の固定が緩むことがない。回転子3の温度がさほど上昇しないならば、熱可塑性樹脂を選ぶこともできる。   The resin material 13 is not limited to a specific substance. What is necessary is just to select a suitable substance according to the use, use environment, etc. of the electric motor 1. FIG. For example, if a thermosetting resin is selected, even if the temperature of the rotor 3 rises during the operation of the electric motor 1, the resin material 13 will not be plasticized, so that the permanent magnet 8 will not be loosened. If the temperature of the rotor 3 does not rise so much, a thermoplastic resin can be selected.

回転子コア7の形態や製造方法が限定されないことは言うまでもない。例えば、回転子コア7は複数の電磁鋼板10に「ダボ」を形成して、該「ダボ」をかしめることよって相互に結合させたものであっても良いし、接着して相互に結合させたものであっても良いし、溶接によって相互に結合させたものであっても良い。   Needless to say, the form and manufacturing method of the rotor core 7 are not limited. For example, the rotor core 7 may be formed by forming “dowels” on a plurality of electromagnetic steel plates 10 and caulking the “dowels”, or bonding them together. It may also be one that has been joined together by welding.

図1に示した電動機1の構成や形態、例えば、固定子2のティース5の数や形状、回転子3の磁石挿入孔9の数や形状や配置は例示である。   The configuration and form of the electric motor 1 shown in FIG. 1, for example, the number and shape of the teeth 5 of the stator 2 and the number, shape and arrangement of the magnet insertion holes 9 of the rotor 3 are examples.

なお、上記実施形態においては、回転子コアの材料として電磁鋼板を例示したが、本発明の技術的範囲は電磁鋼板を使用するものには限定されない。冷延鋼板やアモルファス等、回転子コアを構成可能な材料であれば良く、材料の選択は全くの任意である。   In the above embodiment, the electromagnetic steel plate is exemplified as the material of the rotor core. However, the technical scope of the present invention is not limited to the one using the electromagnetic steel plate. Any material can be used as long as it can form the rotor core, such as a cold-rolled steel plate or amorphous material, and the selection of the material is completely arbitrary.

また、上記実施形態においては、電動機の回転子について例示したが、本発明を発電機の回転子に適用できることは言うまでもない。   Moreover, in the said embodiment, although illustrated about the rotor of the electric motor, it cannot be overemphasized that this invention is applicable to the rotor of a generator.

1 電動機
2 固定子
3 回転子
4 回転軸
5 ティース
6 巻き線
7 回転子コア
8 永久磁石
9 磁石挿入孔
10 電磁鋼板
11 位置決め部材
12 凹所
13 樹脂材料
14 永久磁石と位置決め部材の組
15 位置決めマーク
16 突起
DESCRIPTION OF SYMBOLS 1 Electric motor 2 Stator 3 Rotor 4 Rotating shaft 5 Teeth 6 Winding 7 Rotor core 8 Permanent magnet 9 Magnet insertion hole 10 Electrical steel plate 11 Positioning member 12 Recess 13 Resin material 14 Set of permanent magnet and positioning member 15 Positioning mark 16 protrusion

Claims (8)

回転子コアに形成された磁石挿入孔に永久磁石を挿入して、前記永久磁石を前記回転子コアに固定する回転子の製造方法であって、
前記磁石挿入孔に挿入嵌合される位置決め部材を介して、前記永久磁石を位置決めして前記回転子コアに結合して、
前記磁石挿入孔に樹脂材料を注入して、前記磁石挿入孔と前記永久磁石の間の隙間に充填させて、その後、硬化させることを特徴とする回転子の製造方法。
A rotor manufacturing method for inserting a permanent magnet into a magnet insertion hole formed in a rotor core and fixing the permanent magnet to the rotor core,
Through the positioning member inserted and fitted into the magnet insertion hole, the permanent magnet is positioned and coupled to the rotor core,
A method of manufacturing a rotor, comprising: injecting a resin material into the magnet insertion hole, filling a gap between the magnet insertion hole and the permanent magnet, and then curing the resin material.
前記回転子コアの一方端から前記磁石挿入孔に位置決め部材を挿入して、前記回転子コアに結合する位置決め部材結合工程と、
前記回転子コアの他方端から前記磁石挿入孔に前記永久磁石を挿入し、先に固定された前記位置決め部材と嵌合させて、前記永久磁石を前記回転子コアに結合する永久磁石結合工程と、
前記磁石挿入孔に樹脂材料を注入して、前記磁石挿入孔と前記永久磁石の間の隙間に充填させて、その後、硬化させる充填硬化工程とを、
有することを特徴とする請求項1に記載の回転子の製造方法。
A positioning member coupling step of coupling the rotor core by inserting a positioning member into the magnet insertion hole from one end of the rotor core;
A permanent magnet coupling step of coupling the permanent magnet to the rotor core by inserting the permanent magnet into the magnet insertion hole from the other end of the rotor core and fitting the permanent magnet to the previously fixed positioning member; ,
Filling and curing step of injecting a resin material into the magnet insertion hole, filling the gap between the magnet insertion hole and the permanent magnet, and then curing,
The method of manufacturing a rotor according to claim 1, comprising:
前記永久磁石を位置決め部材と嵌合させて互いに結合する事前組立工程と、
互いに結合された前記永久磁石と前記位置決め部材の組を前記回転子コアの一方端から前記磁石挿入孔に挿入して、前記位置決め部材を前記磁石挿入孔に嵌合させて、前記永久磁石を前記回転子コアに結合する永久磁石結合工程と、
前記磁石挿入孔に樹脂材料を注入して、前記磁石挿入孔と前記永久磁石の間の隙間に充填させて、その後、硬化させる充填硬化工程とを、
有することを特徴とする請求項1に記載の回転子の製造方法。
A pre-assembly step of fitting the permanent magnet with a positioning member and coupling them together;
A pair of the permanent magnet and the positioning member coupled to each other is inserted into the magnet insertion hole from one end of the rotor core, the positioning member is fitted into the magnet insertion hole, and the permanent magnet is inserted into the magnet insertion hole. A permanent magnet coupling step for coupling to the rotor core;
Filling and curing step of injecting a resin material into the magnet insertion hole, filling the gap between the magnet insertion hole and the permanent magnet, and then curing,
The method of manufacturing a rotor according to claim 1, comprising:
前記永久磁石を回転子コアの前記磁石挿入孔に挿入する永久磁石挿入工程と、
位置決め部材を前記磁石挿入孔に挿入して、前記回転子コアに結合するとともに、先に前記磁石挿入孔に挿入された前記永久磁石を前記位置決め部材と嵌合させて、前記永久磁石を前記回転子コアに結合する永久磁石結合工程と、
前記磁石挿入孔に樹脂材料を注入して、前記磁石挿入孔と前記永久磁石の間の隙間に充填させて、その後、硬化させる充填硬化工程とを、
有することを特徴とする請求項1に記載の回転子の製造方法。
A permanent magnet insertion step of inserting the permanent magnet into the magnet insertion hole of the rotor core;
A positioning member is inserted into the magnet insertion hole and coupled to the rotor core, and the permanent magnet previously inserted into the magnet insertion hole is fitted with the positioning member to rotate the permanent magnet. A permanent magnet coupling step for coupling to the child core;
Filling and curing step of injecting a resin material into the magnet insertion hole, filling the gap between the magnet insertion hole and the permanent magnet, and then curing,
The method of manufacturing a rotor according to claim 1, comprising:
前記永久磁石結合工程の完了後に、前記磁石挿入孔の前記位置決め部材が嵌合されていない端部から、別の位置決め部材を挿入して、前記回転子コアに結合するとともに、前記永久磁石を前記別の位置決め部材と嵌合させる、
ことを特徴とする請求項2乃至請求項4のいずれか一項に記載の回転子の製造方法。
After completion of the permanent magnet coupling step, another positioning member is inserted from the end of the magnet insertion hole where the positioning member is not fitted, and coupled to the rotor core, and the permanent magnet is Mating with another positioning member,
The method for manufacturing a rotor according to any one of claims 2 to 4, wherein:
前記位置決め部材は前記樹脂材料と同種の樹脂で成形されている、
ことを特徴とする請求項2乃至請求項4のいずれか一項に記載の回転子の製造方法。
The positioning member is molded of the same kind of resin as the resin material,
The method for manufacturing a rotor according to any one of claims 2 to 4, wherein:
前記位置決め部材は前記樹脂材料と同一の樹脂で成形されている、
ことを特徴とする請求項6に記載の回転子の製造方法。
The positioning member is formed of the same resin as the resin material,
The method of manufacturing a rotor according to claim 6.
永久磁石を備える回転子であって、
磁石挿入孔が形成された回転子コアと、
前記磁石挿入孔の内部に配置された永久磁石と、
前記回転子コアの一方端にあって、前記磁石挿入孔に嵌合されている位置決め部材を備
え、
前記位置決め部材の前記磁石挿入孔に挿入される部位の長さは、前記磁石挿入孔の前記回転子コアを貫通する方向の長さよりも短くされ、
前記永久磁石は、前記磁石挿入孔の内部において、前記位置決め部材と嵌合されていて

前記磁石挿入孔と前記永久磁石の間の隙間には、樹脂材料が充填されている、
ことを特徴とする回転子。
A rotor with permanent magnets,
A rotor core formed with a magnet insertion hole;
A permanent magnet disposed inside the magnet insertion hole;
A positioning member fitted to the magnet insertion hole at one end of the rotor core;
The length of the portion to be inserted into the magnet insertion hole of the positioning member is shorter than the length of the magnet insertion hole in the direction penetrating the rotor core,
The permanent magnet is fitted with the positioning member inside the magnet insertion hole,
The gap between the magnet insertion hole and the permanent magnet is filled with a resin material,
A rotor characterized by that.
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