JP2008061436A

JP2008061436A - Motor

Info

Publication number: JP2008061436A
Application number: JP2006237233A
Authority: JP
Inventors: Takeshi Kowa; 猛古和; Yoshio Kobayashi; 佳生小林
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2006-09-01
Filing date: 2006-09-01
Publication date: 2008-03-13

Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problem in a structure obtained by integrally molding a bracket, a rotor core, and a permanent magnet: it is requred to insert the permanent magnet or fix it with adhesive or the like, in a mold, and the direction of rotation is visually positioned, thereby degrading positional accuracy in the direction of rotation. <P>SOLUTION: Holes for inserting permanent magnets 2, and holes 5 or cuts 6 are provided. Projections 10 provided in a molding die 8 are inserted thereto and integral molding is carried out. The holes for inserting the permanent magnets 2 are provided on either end face side in the axial direction with permanent magnet stoppers 11 protruding toward the holes or into the holes. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、ロータコアと永久磁石を一体成型するロータを搭載するモータに関するものである。 The present invention relates to a motor on which a rotor for integrally molding a rotor core and a permanent magnet is mounted.

従来のロータを図４に示す。内側ロータ３に永久磁石２を挿入する場合と外側ロータ４に永久磁石２を挿入する場合、成型金型内にて挿入もしくは成型金型に載せるまでに治具などで固定子していた。また、回転方向の位置決めは目視にて行い一体成型されていた。（例えば、特許文献１参照）
特表２００５−５２１３７８号公報 A conventional rotor is shown in FIG. When the permanent magnet 2 is inserted into the inner rotor 3 and when the permanent magnet 2 is inserted into the outer rotor 4, the stator is fixed with a jig or the like before being inserted into the molding die or placed on the molding die. Further, the positioning in the rotational direction was performed by visual observation and integrally molded. (For example, see Patent Document 1)
JP-T-2005-521378

しかしながら、上記従来の構成では、一体成型を行うときに永久磁石を挿入または、接着剤等による固定や金型内での装置が必要である。また、回転方向の位置決めは目視で行うため回転方向の位置精度が悪くなるという課題があった。 However, the above-described conventional configuration requires a permanent magnet to be inserted or fixed by an adhesive or an apparatus in a mold when performing integral molding. In addition, since positioning in the rotational direction is performed visually, there is a problem that the positional accuracy in the rotational direction is deteriorated.

上記の課題を解決するために本発明は、永久磁石挿入の孔部以外に孔部または切りかけを有し、成型金型に設けた凸部を挿入して一体成型して、永久磁石挿入用の孔部軸方向のどちらか一方の端面側に孔部または孔部の内側にはり出した形状を設けた。 In order to solve the above-mentioned problems, the present invention has a hole or notch in addition to the hole for permanent magnet insertion, inserts a convex portion provided in a molding die, and integrally molds it, A hole or a shape protruding to the inside of the hole was provided on one end face side in the hole axial direction.

ロータコアに永久磁石を金型内にて挿入する必要がなくなり、接着剤等による固定も不要となる。また、回転方向の位置決めを金型の凸部にて行うため目視確認が不要となる。よって、材料費や工数が低減されモータを低コスト化できる。 There is no need to insert a permanent magnet into the rotor core in the mold, and fixing with an adhesive or the like is also unnecessary. Further, since the rotation direction is positioned by the convex portion of the mold, visual confirmation is not necessary. Therefore, material costs and man-hours are reduced, and the cost of the motor can be reduced.

請求項１に記載の発明は、略環状のヨークと、前記ヨークに設けた複数のティースとからなるステータコアの前記ヨークに、３相スターもしくはデルタ状に結線されトロイダル巻線を施した複数のコイルを有するステータと、前記ステータに対して回転自在に保持されたロータとからなり、前記ロータは、ステータの内径側に対向する内側ロータと、外径側に対向する外側ロータとで構成され、前記ティースは、前記ヨークから外周方向に突出した外側ティースと、前記外側ティースと同数で前記ヨークから内周方向に突出した内側ティースからなり、前記内側ロータと前記外側ロータには永久磁石挿入の孔部が設けられており、前記孔部に収納保持された複数の内側ロータ永久磁石と外側ロータ永久磁石を備え、前記内側ロータ永久磁石と外側ロータ永久磁石の形状が長方形であるモータのロータにおいて、永久磁石挿入の孔部以外に孔部または切りかけを有することで、磁石の加工コストを低減し、さらに切りかけと孔を活用することによりモータの精度を向上することができる。 According to the first aspect of the present invention, there is provided a plurality of coils in which a toroidal winding is provided on the yoke of a stator core composed of a substantially annular yoke and a plurality of teeth provided on the yoke and connected in a three-phase star or delta shape. And a rotor that is rotatably held with respect to the stator, and the rotor includes an inner rotor that faces the inner diameter side of the stator and an outer rotor that faces the outer diameter side, The teeth are composed of outer teeth projecting from the yoke in the outer circumferential direction, and inner teeth projecting from the yoke in the same number as the outer teeth in the inner circumferential direction. Holes for inserting permanent magnets in the inner rotor and the outer rotor Provided with a plurality of inner rotor permanent magnets and outer rotor permanent magnets housed and held in the holes, and the inner rotor permanent magnets In the rotor of a motor in which the shape of the side rotor permanent magnet is rectangular, by having holes or notches in addition to the holes for permanent magnet insertion, the machining cost of the magnet can be reduced, and further by utilizing the notches and holes, the motor Accuracy can be improved.

請求項２に記載の発明は、前記永久磁石挿入用以外の孔部または切りかけに成型金型に設けた凸部を挿入して一体成形することにより、回転方向の位置決めを金型の凸部にて行うことができる。 According to a second aspect of the present invention, the convex portion provided in the molding die is inserted into the hole portion or the cut portion other than the permanent magnet insertion portion and integrally molded, thereby positioning the rotational direction on the convex portion of the mold. Can be done.

請求項３に記載の発明は、前記永久磁石挿入用の孔部軸方向のどちらか一方の端面側に孔部または孔部の内側にはり出した形状を設けることにより、接着剤を不要とし、成型ま
での時間を短縮することができる。 The invention according to claim 3 makes the adhesive unnecessary by providing a hole or a shape protruding to the inside of the hole on one end face side of the hole axial direction for inserting the permanent magnet, The time until molding can be shortened.

以下、本発明の実施例について、図面を用いて説明する。 Embodiments of the present invention will be described below with reference to the drawings.

（実施例１）
図１は、内側ロータ３と外側ロータ４に永久磁石２を埋め込んで樹脂成型する時の状態を示したものである。樹脂が切りかけ６から流れることにより主流路となり切りかけ６を中心に反ゲート方向に波紋状に広がり、圧力により永久磁石２とロータコア１が金型８の方向に押し出されて、モータの組立時のステータ側との隙間が均一になる。また、永久磁石２を埋め込むことにより、リラクタンストルクを補助的に活用することが可能であり、モータの小型化やそれに伴う低コスト化を実現できる。 (Example 1)
FIG. 1 shows a state when the permanent magnet 2 is embedded in the inner rotor 3 and the outer rotor 4 and resin molding is performed. When the resin flows from the notch 6, it becomes a main flow path and spreads in a ripple shape in the anti-gate direction around the notch 6, and the permanent magnet 2 and the rotor core 1 are pushed out in the direction of the mold 8 by the pressure, and the stator at the time of assembling the motor The gap with the side becomes uniform. In addition, by embedding the permanent magnet 2, it is possible to supplementarily use the reluctance torque, and it is possible to reduce the size of the motor and to reduce the cost.

（実施例２）
図２は、内側ロータ３と外側ロータ４に永久磁石２を樹脂成型する前に、ロータコア１の永久磁石２を挿入する孔部以外の孔に成型金型の凸部１０を挿入することにより位置決めを行う状態を示したものである。回転方向の動きを抑制することにより、成型後のロータとステータとの位置関係が均一となり、モータ特性のばらつきを低減することが可能となる。そのため、不良率が低減され低コスト化を実現できる。 (Example 2)
FIG. 2 shows positioning before inserting the permanent magnet 2 into the inner rotor 3 and the outer rotor 4 by inserting the convex portion 10 of the molding die into a hole other than the hole into which the permanent magnet 2 of the rotor core 1 is inserted. It shows the state of performing. By suppressing the movement in the rotation direction, the positional relationship between the rotor and the stator after molding becomes uniform, and variations in motor characteristics can be reduced. As a result, the defect rate is reduced and the cost can be reduced.

（実施例３）
図３は、内側ロータ３と外側ロータ４において、永久磁石２を挿入する孔部に永久磁石２を固定する状態を示したものである。永久磁石２がロータコア１から抜け落ちないため、成型金型装着までの間の輸送が可能となり、接着剤等で固定する必要がないため材料費や工数が低減されモータを低コスト化できる。 (Example 3)
FIG. 3 shows a state in which the permanent magnet 2 is fixed to the hole portion into which the permanent magnet 2 is inserted in the inner rotor 3 and the outer rotor 4. Since the permanent magnet 2 does not fall out of the rotor core 1, it can be transported until the molding die is mounted, and it is not necessary to fix it with an adhesive or the like.

本発明のモータは、洗濯機等に用いられるモータとして有用である。 The motor of the present invention is useful as a motor used in a washing machine or the like.

本発明の第１の実施例のロータと金型を示す部分正面図The partial front view which shows the rotor and metal mold | die of 1st Example of this invention. （ａ）は本発明の第２の実施例のロータと金型を示す部分正面図、（ｂ）は同金型を示す部分正面図(A) The partial front view which shows the rotor and metal mold | die of 2nd Example of this invention, (b) is the partial front view which shows the metal mold | die. （ａ）は本発明の第３の実施例のロータにおける永久磁石挿入部の永久磁石挿入側を示す部分拡大図、（ｂ）は同永久磁石反挿入側を示す部分拡大図(A) is the elements on larger scale which show the permanent magnet insertion side of the permanent magnet insertion part in the rotor of the 3rd Example of this invention, (b) is the elements on larger scale which show the permanent magnet opposite insertion side. 本発明の成型後のロータを示す斜視図The perspective view which shows the rotor after the shaping | molding of this invention 従来のロータと金型を示す部分正面図Partial front view showing a conventional rotor and mold

Explanation of symbols

１ロータコア
２永久磁石
３内側ロータ
４外側ロータ
５孔部
６切りかけ
７成型樹脂
８金型
９樹脂の流路
１０凸部
１１永久磁石止め DESCRIPTION OF SYMBOLS 1 Rotor core 2 Permanent magnet 3 Inner rotor 4 Outer rotor 5 Hole 6 Cutting 7 Molding resin 8 Mold 9 Flow path of resin 10 Convex part 11 Permanent magnet stop

Claims

A stator having a plurality of coils connected to each other in a three-phase star or delta shape on the yoke of a stator core composed of a substantially annular yoke and a plurality of teeth provided on the yoke, and the stator And the rotor is configured by an inner rotor that faces the inner diameter side of the stator and an outer rotor that faces the outer diameter side, and the teeth extend from the yoke in the outer circumferential direction. The outer teeth that protrude and inner teeth that protrude in the inner circumferential direction from the yoke in the same number as the outer teeth are provided with holes for permanent magnet insertion in the inner rotor and the outer rotor. A plurality of inner rotor permanent magnets and outer rotor permanent magnets housed and held in the inner rotor permanent magnet, and shapes of the inner rotor permanent magnet and the outer rotor permanent magnet The motor rotor is rectangular, motor and having a hole or Unfinished other than the hole portion of the permanent magnet insertion.

2. The motor according to claim 1, wherein a convex portion provided in a molding die is inserted into a hole or a portion other than the permanent magnet insertion portion and integrally molded.

The motor according to claim 1, wherein a hole or a shape protruding to the inside of the hole is provided on one end face side in the axial direction of the hole for inserting the permanent magnet.