JP2007306796A - Rotor of electromotor, method of manufacturing rotor of electromotor, resin forming metal mold of rotor of electromotor, electromotor and air conditioner - Google Patents

Rotor of electromotor, method of manufacturing rotor of electromotor, resin forming metal mold of rotor of electromotor, electromotor and air conditioner Download PDF

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JP2007306796A
JP2007306796A JP2007220743A JP2007220743A JP2007306796A JP 2007306796 A JP2007306796 A JP 2007306796A JP 2007220743 A JP2007220743 A JP 2007220743A JP 2007220743 A JP2007220743 A JP 2007220743A JP 2007306796 A JP2007306796 A JP 2007306796A
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rotor
magnet
resin
electric motor
electromotor
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JP4782083B2 (en
JP2007306796A5 (en
Inventor
Mineo Yamamoto
峰雄 山本
Kazuhiro Nakane
和広 中根
Takashi Matsunaga
隆 松永
Hiroyuki Ishii
博幸 石井
Togo Yamazaki
東吾 山崎
Katsumi Shibayama
勝己 柴山
Hitoshi Mochizuki
均 望月
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To obtain the rotator of an electromotor which can accurately assemble the concentricity of a shaft and a rotator resin magnet outside diameter so that improvement of productivity and quality can be attained. <P>SOLUTION: The rotator of the electromotor relating to this invention, in the rotator of the electromotor resin-forming a ring-shaped rotator magnet and a position detecting magnet integrally with the shaft, is characterized by providing a plurality of notches serving as positioning, when the magnets are resin formed, in an inside diameter of one end face of the ring-shaped rotator magnet. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、リング状の回転子の樹脂マグネットと位置検出用樹脂マグネットとが離れて組合わされ、シャフトと熱可塑性樹脂にて一体化される電動機の回転子に関するもので、シャフトとリング状の回転子の樹脂マグネットとを精度良く組立てる方法に関するものである。   The present invention relates to a rotor for an electric motor in which a resin magnet of a ring-shaped rotor and a resin magnet for position detection are combined apart from each other and integrated with a shaft and a thermoplastic resin. The present invention relates to a method for assembling a child resin magnet with high accuracy.

従来の無刷子電動機は、電子部品を実装したプリント基板を電動機内部に内蔵しても、振動が大きくなるなど特性の劣化を生じることがなく、小型化・軽量化・低消費電力化・高品質化できるようにすることを目的として、主磁極部と、この主磁極部の内径より小径のセンサー用磁極部とを同一のフェライト樹脂マグネットで主磁極部を極配向、センサー用磁極部を等方性に磁性粉体であるフェライト微粒子の磁化容易軸の配向を形成し、一体形成した磁石回転子の構成により、固定子鉄心と主磁極部の磁気中心が一致し、磁気飽和が抑制され、鎖交磁束が正弦波になり、誘起電圧位相に対して最適な通電位相になるので、トルクリップル等の増大が抑制され、軸および回転方向の振動の増大が抑制される。また、部品点数および加工工数が削減するため、コスト低減ができ、低コスト・低振動・小型化の無刷子電動機が得られる。また、そのような無刷子電動機の回転子が、フェライト焼結極異方性磁石による主磁極部とフェライト焼結等方性磁石によるセンサー用磁極部とシャフトがＰＢＴ（ポリブチレンテレフタレート）等の熱可塑性樹脂で一体的に成形固化されて構成されている例もある（例えば、特許文献１参照）。   Conventional non-printer motors do not cause deterioration of characteristics, such as increased vibration, even if a printed circuit board with electronic components mounted inside is built in the motor, making them smaller, lighter, lower power consumption, and higher quality The main magnetic pole part and the magnetic pole part for the sensor whose diameter is smaller than the inner diameter of the main magnetic pole part are pole-oriented with the same ferrite resin magnet, and the magnetic pole part for the sensor is isotropic. The orientation of the easy magnetization axis of ferrite fine particles, which are magnetic powders, is formed, and the structure of the integrally formed magnet rotor matches the magnetic center of the stator core and the main magnetic pole, thereby suppressing magnetic saturation and chaining. Since the cross magnetic flux becomes a sine wave and becomes an optimum energization phase with respect to the induced voltage phase, an increase in torque ripple or the like is suppressed, and an increase in vibrations in the shaft and rotational directions is suppressed. Further, since the number of parts and the number of processing steps are reduced, the cost can be reduced, and a low-cost, low-vibration, and compact brushless motor can be obtained. In addition, the rotor of such a brushless motor has a main magnetic pole portion made of sintered ferrite polar anisotropic magnet, a magnetic pole portion for sensor made of sintered ferrite isotropic magnet, and a shaft made of heat such as PBT (polybutylene terephthalate). There is also an example in which a plastic resin is integrally molded and solidified (see, for example, Patent Document 1).

また、従来の合成樹脂モールド構造を有する回転子構造は、構造が簡単で、回転子と結合部と円筒型マグネットが強固に結合し、しかも組立の際にリング状の薄型マグネットが破損せず、安価な回転電機の回転子構造を提供するために、円筒型マグネットと側板と回転軸部分とを射出成型用の型内に載置し、結合用の合成樹脂を型内に射出して結合部を形成し、これにより円筒型マグネットと側板と回転軸部分とを一体に形成して回転子構造を形成する（例えば、特許文献２参照）。   In addition, the rotor structure having the conventional synthetic resin mold structure is simple in structure, and the rotor, the coupling portion, and the cylindrical magnet are firmly coupled, and the ring-shaped thin magnet is not damaged during assembly. In order to provide an inexpensive rotor structure for a rotating electrical machine, a cylindrical magnet, a side plate, and a rotating shaft portion are placed in an injection molding mold, and a synthetic resin for bonding is injected into the mold to form a coupling portion. Thus, the cylindrical magnet, the side plate, and the rotating shaft portion are integrally formed to form a rotor structure (see, for example, Patent Document 2).

また、従来のプラスチックマグネットロータは、低価格で伝達加振力の低減、低騒音化が可能なプラスチックマグネットロータを得るために、極配向したプラスチックマグネットで成形された磁極部と、中心軸線上に配置された軸と、軸を中心として半径方向に放射状に配置された軸方向のリブを有し、リブ間に軸方向に貫通した空洞が形成され、プラスチックマグネットより柔らかい熱可塑性樹脂で成形された連結部品と、を備え、磁極部を連結部品を介して軸と結合している（例えば、特許文献３参照）。
特開２０００−３２４７８５号公報 特開平７−３１１２０号公報 特開２００１−３２０８４４号公報 特開２００３−６１２７９号公報 特開２００１−２７５３１７号公報 特開昭６２−２０３５３９号公報 特開２００２−５８１８６号公報 実開平５−２３７８４号公報 特開２００３−８８０５９号公報 特開２０００−１８４６３７号公報 In addition, the conventional plastic magnet rotor has a magnetic pole part formed of a polar-oriented plastic magnet and a central axis line in order to obtain a plastic magnet rotor that can reduce transmission vibration force and reduce noise at a low price. It has an arranged shaft and radial ribs radially arranged around the shaft, and a cavity penetrating in the axial direction is formed between the ribs, and is molded from a thermoplastic resin softer than a plastic magnet. A connecting part, and the magnetic pole portion is coupled to the shaft via the connecting part (see, for example, Patent Document 3).
JP 2000-324785 A JP-A-7-31120 JP 2001-320844 A JP 2003-61279 A JP 2001-275317 A JP-A-62-203539 JP 2002-58186 A Japanese Utility Model Laid-Open No. 5-23784 JP 2003-88059 A JP 2000-184637 A

従来の極配向されたリング状の回転子の樹脂マグネットと平行配向された位置検出用樹脂マグネットをシャフトと熱可塑性樹脂にて一体化される電動機の回転子では、回転子の樹脂マグネットは成形され製作されることから、内径と外径寸法には成形条件、材料、環境等により、仕上り幅を持つことになる。回転子の樹脂マグネットとシャフトとの熱可塑性樹脂による一体化を行うとき、回転子の樹脂マグネットの外径を保持する金型構造とした場合、回転子の樹脂マグネットの外径の仕上がり幅、固定側金型への挿入するためのすき間、シャフトと金型のシャフト挿入部のすき間等が蓄積され、シャフトと回転子の樹脂マグネット外径の同軸度が悪化し、電動機に組付けた際、音、振動の要因となっていた。   In a rotor of an electric motor in which a position detecting resin magnet aligned in parallel with a conventional polar-oriented ring-shaped rotor resin magnet is integrated with a shaft and a thermoplastic resin, the resin magnet of the rotor is molded. Since it is manufactured, the inner and outer diameter dimensions have finished widths depending on molding conditions, materials, environments, and the like. When integrating the rotor resin magnet and the shaft with thermoplastic resin, if the mold structure is to hold the outer diameter of the rotor resin magnet, the finished width and fixing of the outer diameter of the rotor resin magnet is fixed. The clearance for inserting into the side mold, the clearance between the shaft and the shaft insertion part of the mold, etc. are accumulated, and the coaxiality of the outer diameter of the resin magnet of the shaft and rotor deteriorates. Was a factor in vibration.

この発明は、上記のような問題点を解決するためになされたもので、生産性、品質の向上を図ることが出来る電動機の回転子及び電動機の回転子の製造方法及び電動機の回転子の樹脂成形金型及び電動機及び空気調和機を得ることを目的とする。   The present invention has been made to solve the above-described problems, and is capable of improving productivity and quality. An electric motor rotor, a method for manufacturing an electric motor rotor, and an electric motor rotor resin. It aims at obtaining a molding die, an electric motor, and an air conditioner.

この発明に係る電動機の回転子は、リング状の回転子マグネットと位置検出用マグネットとをシャフトと一体に樹脂成形する電動機の回転子において、リング状の回転子マグネットの一方の端面の内径に、樹脂成形時の位置決めとなる切欠きを複数設けたことを特徴とする。   The rotor of the electric motor according to the present invention is the rotor of the electric motor in which the ring-shaped rotor magnet and the position detection magnet are integrally molded with the shaft, the inner diameter of one end surface of the ring-shaped rotor magnet, A plurality of notches are provided for positioning during resin molding.

この発明に係る電動機の回転子は、リング状の回転子マグネットの一方の端面の内径に、樹脂成形時の位置決めとなる切欠きを複数設けたことにより、シャフトと回転子マグネット外径の同軸度が向上することから品質の向上が図られる。   The rotor of the electric motor according to the present invention is provided with a plurality of notches for positioning during resin molding on the inner diameter of one end surface of the ring-shaped rotor magnet, so that the shaft and the outer diameter of the rotor magnet are coaxial. As a result, the quality is improved.

実施の形態１．
図１乃至４は実施の形態１を示す図で、図１は電動機の回転子を示す図、図２は回転子の樹脂マグネットを示す図、図３は回転子の樹脂成形を行う金型を示す図、図４は電動機の回転子の製造フローを示す図である。 Embodiment 1 FIG.
1 to 4 are diagrams showing the first embodiment, FIG. 1 is a diagram showing a rotor of an electric motor, FIG. 2 is a diagram showing a resin magnet of the rotor, and FIG. 3 is a mold for resin molding of the rotor. FIG. 4 is a diagram showing a manufacturing flow of the rotor of the electric motor.

図１に示すように、リング状の回転子の樹脂マグネット６に位置検出用樹脂マグネット３が回転子の樹脂マグネット６の端面から所定距離離して組付けられ、ローレット２を施されたシャフト１と熱可塑性の樹脂９にて成形され一体化されている。段差５を備えた位置検出用樹脂マグネット３は、取付け足４により回転子の樹脂マグネット６に取り付けられる。シャフト１外周の樹脂９の両端面はベアリング設置面１０となる。詳しくは後述するが、シャフト１との一体成形時のゲート１１が回転子の樹脂マグネット６の内径よりもさらに内側に凸形状で配置されている。また、シャフト１との一体成形時、位置検出用樹脂マグネット３の外周に薄皮１２が形成される。   As shown in FIG. 1, a position detecting resin magnet 3 is assembled to a ring-shaped rotor resin magnet 6 at a predetermined distance from the end surface of the resin magnet 6 of the rotor, and the shaft 1 to which the knurled 2 is applied. It is molded and integrated with a thermoplastic resin 9. The position detecting resin magnet 3 provided with the step 5 is attached to the rotor resin magnet 6 by the attachment foot 4. Both end surfaces of the resin 9 on the outer periphery of the shaft 1 become bearing installation surfaces 10. As will be described in detail later, the gate 11 at the time of integral molding with the shaft 1 is arranged in a convex shape further inside than the inner diameter of the resin magnet 6 of the rotor. In addition, a thin skin 12 is formed on the outer periphery of the position detecting resin magnet 3 during integral molding with the shaft 1.

ここで、回転子の樹脂マグネット６は熱可塑性樹脂に磁性材が混合され成形されたもので、図２に示すように、極配向され、磁極の内径に片方の端面からテーパ状に切欠き８を設け、また、切欠き８のある端面の反対側の端面に、位置検出用樹脂マグネット３を据える台座部１３を備えている。   Here, the resin magnet 6 of the rotor is formed by mixing a magnetic material with a thermoplastic resin, and as shown in FIG. 2, it is pole-oriented and is notched in a tapered shape from one end face to the inner diameter of the magnetic pole. And a pedestal portion 13 for placing the position detecting resin magnet 3 on the end surface opposite to the end surface having the notch 8.

台座部１３により位置検出用樹脂マグネット３を回転子の樹脂マグネット６の端面から離すことが可能となり、位置検出用樹脂マグネット３の肉厚を最小、かつ、任意の位置に配置することが可能となり、樹脂マグネットより安価な熱可塑性樹脂を充填することで、コストの低減が可能となっている。また、位置検出用樹脂マグネット３の材質を回転子の樹脂マグネット６とは別の安価なものにすることもできる。   The position detecting resin magnet 3 can be separated from the end surface of the rotor resin magnet 6 by the pedestal portion 13, and the thickness of the position detecting resin magnet 3 can be minimized and arranged at an arbitrary position. Costs can be reduced by filling a thermoplastic resin that is cheaper than a resin magnet. Moreover, the material of the position detection resin magnet 3 can be made inexpensive and different from the resin magnet 6 of the rotor.

台座部１３には、位置検出用樹脂マグネット３に備える取付け足４が嵌り込む取付け穴が設けられ、回転子の樹脂マグネット６に組み付けられた時の回り止めとなっている。また、シャフト１との樹脂成形時に可動側金型１６の回り止め押さえ部２４により位置決めされるように、台座部１３に位置決め用突起７を設けている。   The pedestal portion 13 is provided with a mounting hole into which the mounting foot 4 provided in the position detecting resin magnet 3 is fitted, and serves as a detent when the pedestal portion 13 is assembled to the resin magnet 6 of the rotor. Further, the positioning projection 7 is provided on the pedestal portion 13 so that the positioning stop portion 24 of the movable mold 16 is positioned during resin molding with the shaft 1.

リング状の回転子の樹脂マグネット６の内径には、複数箇所に回り止め突起１４を備え、シャフト１との樹脂成形の際に埋設されることにより、回り止め突起１４より回転トルクがシャフト１に伝達される。   The inner diameter of the resin magnet 6 of the ring-shaped rotor is provided with anti-rotation projections 14 at a plurality of locations, and is embedded in the resin molding with the shaft 1 so that the rotational torque is applied to the shaft 1 by the anti-rotation projections 14. Communicated.

尚、シャフト１との一体成形時には、位置検出用樹脂マグネット３の外周にも薄皮１２が形成され、位置検出用樹脂マグネット３の外径のばらつきにも対応し、位置検出用樹脂マグネット３の表出する端面及び回転子の樹脂マグネット６の両端面で樹脂をせき止めるため、位置検出用樹脂マグネット３及び回転子の樹脂マグネット６の外周におけるバリの発生を抑えることが可能となり品質の向上が図られている。   In addition, at the time of integral molding with the shaft 1, a thin skin 12 is also formed on the outer periphery of the position detection resin magnet 3, corresponding to variations in the outer diameter of the position detection resin magnet 3. Since the resin is blocked by the protruding end face and both end faces of the rotor resin magnet 6, it is possible to suppress the occurrence of burrs on the outer periphery of the position detection resin magnet 3 and the rotor resin magnet 6, thereby improving the quality. ing.

また、シャフト１との一体成形時のゲート１１を回転子の樹脂マグネット６の内径よりもさらに内側に凸形状で配置することで、圧力の集中を緩和し、樹脂の充填が容易に、また、凸部を位置決めに利用することも可能となっている。   Further, by arranging the gate 11 at the time of integral molding with the shaft 1 in a convex shape further inside than the inner diameter of the resin magnet 6 of the rotor, the concentration of pressure is eased and the resin can be easily filled. The convex portion can also be used for positioning.

図４の製造フローにより、電動機の回転子の製造方法を簡単に説明する。回転子の樹脂マグネット６及び位置検出用樹脂マグネット３を成形した後それぞれを脱磁し、位置検出用樹脂マグネット３を回転子の樹脂マグネット６に組付ける。一方、シャフト１を所定の形状に加工する。シャフト１と位置検出用樹脂マグネット３が組付けられた回転子の樹脂マグネット６が金型にセットされ、ＰＢＴ等の熱可塑性樹脂が射出成形されて樹脂成形されることにより一体化される。そして、それぞれのマグネットを着磁し、ベアリングを組付けて完了する。   The manufacturing method of the rotor of the electric motor will be briefly described with reference to the manufacturing flow of FIG. After the rotor resin magnet 6 and the position detection resin magnet 3 are formed, each is demagnetized, and the position detection resin magnet 3 is assembled to the rotor resin magnet 6. On the other hand, the shaft 1 is processed into a predetermined shape. The resin magnet 6 of the rotor to which the shaft 1 and the position detection resin magnet 3 are assembled is set in a mold, and a thermoplastic resin such as PBT is molded by injection molding and resin molding. Then, each magnet is magnetized, and the bearings are assembled to complete.

図３により、回転子の樹脂成形金型について説明する。可動側金型１６は、金型合わせ面１８、位置検出用樹脂マグネット押さえ面１９、シャフト挿入部２３、回り止め押さえ部２４を有する。固定側金型１７は、金型合わせ面１８、回転子の樹脂マグネット挿入部２０、回転子の樹脂マグネット設置面２１、切欠き押さえ部２２、シャフト挿入部２３を有する。   With reference to FIG. 3, the resin molding die for the rotor will be described. The movable mold 16 includes a mold matching surface 18, a position detection resin magnet pressing surface 19, a shaft insertion portion 23, and a rotation stopper pressing portion 24. The stationary mold 17 includes a mold mating surface 18, a rotor resin magnet insertion portion 20, a rotor resin magnet installation surface 21, a notch holding portion 22, and a shaft insertion portion 23.

図３に示すように、シャフト１と位置検出用樹脂マグネット３が組付けられた回転子の樹脂マグネット６が金型にセットされ、樹脂成形されることにより一体化される。ここで、回転子の樹脂マグネット６に位置検出用樹脂マグネット３が組付けられ、固定側金型１７にセットされるが、固定側金型１７に備える切欠き押さえ部２２に回転子の樹脂マグネット６の切欠き８が嵌め込まれている。   As shown in FIG. 3, a rotor resin magnet 6 having the shaft 1 and position detection resin magnet 3 assembled thereto is set in a mold and integrated by resin molding. Here, the resin magnet 6 for position detection is assembled to the resin magnet 6 of the rotor and is set to the fixed mold 17, and the rotor resin magnet is attached to the notch holding portion 22 provided in the fixed mold 17. 6 notches 8 are fitted.

この時、固定側金型１７の回転子の樹脂マグネット設置面２１と回転子の樹脂マグネット６の端面に微小の隙間をとり、固定側金型１７の回転子の樹脂マグネット挿入部２０と回転子の樹脂マグネット６の外径にも隙間が出来る。そして、固定側金型１７の金型合わせ面１８より回転子の樹脂マグネット６の端面が突出する段差が、回転子の樹脂マグネット６の端面と固定側金型１７の回転子の樹脂マグネット設置面２１との隙間よりも大きい金型寸法とする。   At this time, a minute gap is formed between the resin magnet installation surface 21 of the rotor of the fixed mold 17 and the end surface of the resin magnet 6 of the rotor, so that the resin magnet insertion portion 20 and the rotor of the rotor of the fixed mold 17 are rotated. A gap is also formed on the outer diameter of the resin magnet 6. And the level | step difference which the end surface of the resin magnet 6 of a rotor protrudes from the metal mold | die matching surface 18 of the stationary mold 17 is the resin magnet installation surface of the rotor resin magnet 6 and the rotor of the stationary mold 17. The die size is larger than the gap with 21.

また、位置検出用樹脂マグネット３の端面と回転子の樹脂マグネット６の端面の距離に対して、可動側金型１６の位置検出用樹脂マグネット押さえ面１９と可動側金型１６の固定側金型１７との金型合わせ面１８との距離が小さい金型寸法とする。   Further, the position detection resin magnet pressing surface 19 of the movable mold 16 and the fixed mold of the movable mold 16 with respect to the distance between the end surface of the position detection resin magnet 3 and the end surface of the resin magnet 6 of the rotor. The distance between the mold 17 and the mold mating surface 18 is small.

固定側金型１７のシャフト挿入部２３にシャフト１が挿入され、可動側金型１６が閉じられることにより、回転子の樹脂マグネット６の端面が固定側金型１７の回転子の樹脂マグネット設置面２１と可動側金型１６の金型合わせ面１８、かつ位置検出用樹脂マグネット３が可動側金型１６の位置検出用樹脂マグネット押さえ面１９に押し付けられて、それぞれのベアリング設置面１０からの距離が確保される。   The shaft 1 is inserted into the shaft insertion portion 23 of the fixed mold 17 and the movable mold 16 is closed, so that the end surface of the resin magnet 6 of the rotor is the resin magnet installation surface of the rotor of the fixed mold 17. 21 and the mold mating surface 18 of the movable mold 16 and the position detecting resin magnet 3 are pressed against the position detecting resin magnet pressing surface 19 of the movable mold 16, and the distance from each bearing installation surface 10. Is secured.

ＰＢＴ等の熱可塑性樹脂が射出成形され、回転子が形成されるが、このとき、回転子の樹脂マグネット６の切欠き８の一部と、回り止め突起１４が熱可塑性樹脂に埋設され回転トルクの伝達部分となり、回転子の樹脂マグネット６の回転トルクが確実にシャフト１に伝達される。また、樹脂成形後に表出する回転子の樹脂マグネット６の切欠き８をマグネットの着磁の際の位置決めに利用することもできる。   A thermoplastic resin such as PBT is injection-molded to form a rotor. At this time, a part of the notch 8 of the resin magnet 6 of the rotor and the non-rotating projection 14 are embedded in the thermoplastic resin to rotate torque. Thus, the rotational torque of the resin magnet 6 of the rotor is reliably transmitted to the shaft 1. Further, the notch 8 of the rotor resin magnet 6 that appears after resin molding can be used for positioning when magnetizing the magnet.

回転子の樹脂マグネット６は成形され製作されることから、内径と外径との同軸度には成形する金型の同軸度のみが反映されるが、内径と外径寸法には成形条件、材料、環境等により、仕上り幅を持つことになる。   Since the resin magnet 6 of the rotor is molded and manufactured, only the coaxiality of the mold to be molded is reflected in the coaxiality between the inner diameter and the outer diameter, but the molding conditions and materials are reflected in the inner diameter and outer diameter dimensions. Depending on the environment, it will have a finished width.

回転子の樹脂マグネット６とシャフト１との熱可塑性樹脂による一体化を行うとき、回転子の樹脂マグネット６の外径を保持する金型構造とした場合、回転子の樹脂マグネット６の外径の仕上がり幅、固定側金型１７への挿入するための隙間、シャフト１と金型のシャフト挿入部２３の隙間等が集積され、シャフト１と回転子の樹脂マグネット６外径との同軸度が悪化し、電動機に組付けた際、音、振動の要因となっていた。   When the rotor resin magnet 6 and the shaft 1 are integrated with a thermoplastic resin, when the mold structure that holds the outer diameter of the rotor resin magnet 6 is used, the outer diameter of the rotor resin magnet 6 is reduced. The finished width, the gap for insertion into the fixed mold 17, the gap between the shaft 1 and the shaft insertion portion 23 of the mold are accumulated, and the coaxiality between the shaft 1 and the outer diameter of the resin magnet 6 of the rotor deteriorates. However, when assembled in an electric motor, it was a cause of sound and vibration.

しかし、本実施の形態の回転子では、固定側金型１７の切欠き押さえ部２２とシャフト挿入部２３の同軸を金型加工時に出せば、シャフト１と金型のシャフト挿入部２３の隙間のみがシャフト１と回転子の樹脂マグネット６外径との同軸度に反映され、同軸度の向上による品質の向上が可能となっている。   However, in the rotor according to the present embodiment, if the notch holding portion 22 of the fixed mold 17 and the shaft insertion portion 23 are coaxial when the mold is processed, only the gap between the shaft 1 and the shaft insertion portion 23 of the mold is obtained. Is reflected in the coaxiality between the shaft 1 and the outer diameter of the resin magnet 6 of the rotor, and the quality can be improved by improving the coaxiality.

また、回転子の樹脂マグネット６の外周と固定側金型１７の回転子の樹脂マグネット挿入部２０との間に隙間を確保することが出来ることにより、回転子の樹脂マグネット６の金型へのセット作業が容易となり、生産性の向上が可能となっている。   Further, since a gap can be secured between the outer periphery of the resin magnet 6 of the rotor and the resin magnet insertion portion 20 of the rotor of the fixed mold 17, the rotor resin magnet 6 can be attached to the mold. The set operation is facilitated and productivity can be improved.

上記実施の形態では、回転子と位置検出用のマグネットの両方を樹脂マグネットとしたが、例えば、どちらか一方、または、両方のマグネットをフェライトの焼結マグネットとし、同軸を出す機能を備えた緩衝部品をフェライト焼結マグネットに組付けてもよい。   In the above embodiment, both the rotor and the position detection magnet are resin magnets. For example, one or both of the magnets are ferrite sintered magnets, and a buffer having a function of providing a coaxial axis. The component may be assembled to a ferrite sintered magnet.

また、樹脂マグネットに対し、ゴム、エラストマに磁性材が混合されたマグネットでもよい。   Further, a magnet in which a magnetic material is mixed with rubber or elastomer may be used for the resin magnet.

また、回転子のマグネットの内径に複数箇所に切欠きを設ける構造とし、切欠きの反対の端面に位置決めの突起を備えることを示したが、回転方向の位置決めを除去し、かつ、内径をテーパ状にし同軸度のみを得る構造としてもよい。   In addition, it has been shown that notches are provided at multiple locations on the inner diameter of the rotor magnet, and positioning protrusions are provided on the end surface opposite to the notches, but positioning in the rotational direction is removed and the inner diameter is tapered. It is good also as a structure which obtains only a concentricity.

また、回転子の樹脂マグネット６の切欠き８は、図２に示すように、磁極と対向する位置関係としたが、この位置関係を変更してもよい。   Further, as shown in FIG. 2, the notch 8 of the resin magnet 6 of the rotor has a positional relationship facing the magnetic pole, but this positional relationship may be changed.

また、位置検出用樹脂マグネット３を別部品としないで、回転子の樹脂マグネット６に付加してもよい。   Further, the position detecting resin magnet 3 may be added to the rotor resin magnet 6 without being a separate part.

また、金型の固定側、可動側の関係を逆にしてもよい。   Further, the relationship between the fixed side and the movable side of the mold may be reversed.

また、金型と樹脂マグネットの寸法関係を言及しているが一部または全部が異なるものでもよい。   Moreover, although the dimensional relationship between the mold and the resin magnet is mentioned, a part or all of them may be different.

上述の実施の形態では、回転子の樹脂マグネット６とシャフト１を樹脂にて一体にする際、金型で回転子の樹脂マグネット６の内径の切欠き８とシャフト１を位置決めするため、シャフト１と回転子の樹脂マグネット６外径の同軸度が向上することから電動機の品質の向上が図られる。   In the above-described embodiment, when the rotor resin magnet 6 and the shaft 1 are integrated with resin, the notch 8 and the shaft 1 of the inner diameter of the resin magnet 6 of the rotor are positioned with a mold, so that the shaft 1 Since the coaxiality of the outer diameter of the resin magnet 6 of the rotor is improved, the quality of the electric motor can be improved.

また、回転子の樹脂マグネット６の外径と金型の回転子の樹脂マグネット挿入部２０の隙間を大きく取ることが可能となることから、マグネットのセット作業が容易となり、生産性の向上とそれに伴うコストの低減が図られる。   Further, since it is possible to make a large gap between the outer diameter of the resin magnet 6 of the rotor and the resin magnet insertion portion 20 of the mold rotor, the magnet setting work is facilitated, and productivity is improved. The accompanying cost can be reduced.

実施の形態２．
図５は実施の形態２を示す図で、電動機を示す図である。
図５に示すように、実施の形態１のベアリング２７を取り付けた電動機の回転子２５を、位置検出センサー２６を有するモールド固定子２８と組合せて電動機が完成する。 Embodiment 2. FIG.
FIG. 5 is a diagram showing the second embodiment and is a diagram showing an electric motor.
As shown in FIG. 5, the motor 25 is completed by combining the rotor 25 of the motor to which the bearing 27 of the first embodiment is attached with a mold stator 28 having a position detection sensor 26.

電動機に組付けた場合、ベアリング設置面１０と位置検出用樹脂マグネット３との距離は樹脂成形で製作されるため精度が良いことから、位置検出センサー２６と位置検出用樹脂マグネット３との距離を詰めることが可能となり、位置検出の精度の向上が図れ、品質の向上が可能となる。   When assembled in an electric motor, the distance between the bearing installation surface 10 and the position detection resin magnet 3 is manufactured by resin molding, and therefore the accuracy is good. Therefore, the distance between the position detection sensor 26 and the position detection resin magnet 3 is This makes it possible to improve the position detection accuracy and the quality.

実施の形態３．
図６は実施の形態３を示す図で、空気調和機の構成を示す図である。図に示すように、空気調和機は、空気調和機の室内機２９と、空気調和機の室外機３０とを備え、空気調和機の室外機３０は送風機３１を有する。 Embodiment 3 FIG.
FIG. 6 is a diagram illustrating the third embodiment and is a diagram illustrating the configuration of the air conditioner. As shown in the figure, the air conditioner includes an air conditioner indoor unit 29 and an air conditioner outdoor unit 30, and the air conditioner outdoor unit 30 includes a blower 31.

空気調和機の室内機２９は空気調和機の室外機３０に接続され、実施の形態２で示した電動機で駆動される送風機３１を有している。音、振動が抑えられる電動機を空気調和機用の主要部品である送風機用電動機として用いることは好適である。   The indoor unit 29 of the air conditioner is connected to the outdoor unit 30 of the air conditioner, and has a blower 31 that is driven by the electric motor shown in the second embodiment. It is preferable to use an electric motor capable of suppressing sound and vibration as a blower electric motor which is a main part for an air conditioner.

実施の形態１を示す図で、電動機の回転子を示す図である。It is a figure which shows Embodiment 1, and is a figure which shows the rotor of an electric motor. 実施の形態１を示す図で、回転子の樹脂マグネットを示す図である。It is a figure which shows Embodiment 1, and is a figure which shows the resin magnet of a rotor. 実施の形態１を示す図で、回転子の樹脂成形を行う金型を示す図である。It is a figure which shows Embodiment 1, and is a figure which shows the metal mold | die which performs resin molding of a rotor. 実施の形態１を示す図で、電動機の回転子の製造フローを示す図である。It is a figure which shows Embodiment 1 and is a figure which shows the manufacture flow of the rotor of an electric motor. 実施の形態２を示す図で、電動機を示す図である。It is a figure which shows Embodiment 2, and is a figure which shows an electric motor. 実施の形態３を示す図で、空気調和機の構成を示す図である。It is a figure which shows Embodiment 3, and is a figure which shows the structure of an air conditioner.

符号の説明Explanation of symbols

１ シャフト、２ ローレット、３ 位置検出用樹脂マグネット、４ 取付け足、５ 段差、６ 回転子の樹脂マグネット、７ 位置決め用突起、８ 切欠き、９ 樹脂、１０ ベアリング設置面、１１ ゲート、１２ 薄皮、１３ 台座部、１４ 回り止め突起、１５ 取付け穴、１６ 可動側金型、１７ 固定側金型、１８ 金型合わせ面、１９ 位置検出用樹脂マグネット押さえ面、２０ 回転子の樹脂マグネット挿入部、２１ 回転子の樹脂マグネット設置面、２２ 切欠き押さえ部、２３ シャフト挿入部、２４ 回り止め押さえ部、２５ 電動機の回転子、２６ 位置検出センサー、２７ ベアリング、２８ モールド固定子、２９ 空気調和機の室内機、３０ 空気調和機の室外機、３１ 送風機。   1 shaft, 2 knurls, 3 position detection resin magnet, 4 mounting feet, 5 steps, 6 rotor resin magnet, 7 positioning protrusion, 8 notch, 9 resin, 10 bearing installation surface, 11 gate, 12 thin skin, 13 Base part, 14 Non-rotating projection, 15 Mounting hole, 16 Movable mold, 17 Fixed mold, 18 Mold mating surface, 19 Position detection resin magnet pressing surface, 20 Rotor resin magnet insertion part, 21 Rotor resin magnet installation surface, 22 Notch holding part, 23 Shaft insertion part, 24 Non-rotating holding part, 25 Motor rotor, 26 Position detection sensor, 27 Bearing, 28 Mold stator, 29 Air conditioner room Machine, 30 outdoor unit of air conditioner, 31 blower.

Claims (8)

リング状の回転子マグネットと位置検出用マグネットとをシャフトと一体に樹脂成形する電動機の回転子において、
前記リング状の回転子マグネットの一方の端面の内径に、前記樹脂成形時の位置決めとなる切欠きを複数設けたことを特徴とする電動機の回転子。 In the rotor of an electric motor in which a ring-shaped rotor magnet and a position detection magnet are molded integrally with a shaft,
A rotor for an electric motor, wherein a plurality of notches for positioning during the resin molding are provided on an inner diameter of one end face of the ring-shaped rotor magnet. 前記リング状の回転子マグネットの切欠きが、樹脂成形によりシャフトと一体化される時に、一部が埋設されることを特徴とする請求項１に記載の電動機の回転子。   The rotor of an electric motor according to claim 1, wherein a part of the notch of the ring-shaped rotor magnet is embedded when the notch is integrated with the shaft by resin molding. リング状の回転子マグネットと位置検出用マグネットとをシャフトと一体に樹脂成形する電動機の回転子において、
前記位置検出用マグネットを前記回転子マグネットの端面から所定距離離して設け、前記回転子マグネットの端面と前記位置検出用マグネットの間に成形用樹脂を充填したことを特徴とする電動機の回転子。 In the rotor of an electric motor in which a ring-shaped rotor magnet and a position detection magnet are molded integrally with a shaft,
A rotor for an electric motor, wherein the position detection magnet is provided at a predetermined distance from the end face of the rotor magnet, and a molding resin is filled between the end face of the rotor magnet and the position detection magnet. リング状の回転子マグネットと位置検出用マグネットとをシャフトと一体に樹脂成形する電動機の回転子の製造方法において、
前記樹脂成形の際に、前記回転子マグネットの一方の端面の内径に設けた切欠きに、金型の切欠き押さえ部が嵌め合わされて位置決めされることを特徴とする電動機の回転子の製造方法。 In the method of manufacturing a rotor for an electric motor in which a ring-shaped rotor magnet and a position detection magnet are molded integrally with a shaft,
A method for manufacturing a rotor of an electric motor, wherein a notch holding portion of a mold is fitted and positioned in a notch provided in an inner diameter of one end face of the rotor magnet during the resin molding . 前記回転子マグネット及び位置検出用マグネットを着磁する際に、樹脂成形後に表出する前記回転子マグネットに設けた切欠きを位置決めに利用することを特徴とする請求項４に記載の電動機の回転子の製造方法。   5. The rotation of an electric motor according to claim 4, wherein when the rotor magnet and the position detection magnet are magnetized, a notch provided in the rotor magnet exposed after resin molding is used for positioning. Child manufacturing method. リング状の回転子マグネットと位置検出用マグネットとをシャフトと一体に樹脂成形する電動機の回転子の樹脂成形金型において、
前記回転子マグネットの一方の端面の内径に設けた切欠きに嵌め合わされて位置決めされる切欠き押さえ部を備えたことを特徴とする電動機の回転子の樹脂成形金型。 In the resin molding mold of the rotor of the electric motor that resin-molds the ring-shaped rotor magnet and the position detection magnet integrally with the shaft,
A resin molding die for a rotor of an electric motor, comprising: a notch holding portion that is fitted and positioned in a notch provided on an inner diameter of one end face of the rotor magnet. 請求項１乃至３の何れかの電動機の回転子を用い、位置検出用マグネットの位置を検出する位置検出センサーを備えたことを特徴とする電動機。   An electric motor comprising a position detection sensor that detects the position of a position detection magnet using the rotor of the electric motor according to claim 1. 請求項７記載の電動機を送風機用電動機に用いたことを特徴とする空気調和機。   An air conditioner using the electric motor according to claim 7 as an electric motor for a blower.
JP2007220743A 2007-08-28 2007-08-28 Motor rotor, motor and air conditioner Expired - Fee Related JP4782083B2 (en)

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