JP2009278821A

JP2009278821A - Molded motor

Info

Publication number: JP2009278821A
Application number: JP2008129400A
Authority: JP
Inventors: Honko Morishita; 本弘森下
Original assignee: Panasonic Corp
Current assignee: Panasonic Corp
Priority date: 2008-05-16
Filing date: 2008-05-16
Publication date: 2009-11-26

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molded motor extending the service life of bearings. <P>SOLUTION: A motor is composed of: a stator 4 formed by winding a driving coil 3 around a stator core 1 via an insulator 2; a printed circuit board 6 mounted with electronic components 5; a molded stator 8 formed by integrally molding the stator 4 and the printed circuit board 6 with resin 7; a magnetic rotor 9 rotatably held opposite to the stator core 1; a rotary shaft 10 passing through the center of the magnetic rotor 9; the bearings 11 which hold the rotary shaft 10; and a steel bracket 12 which is press-inserted into the molded stator 8 and holds the bearings 11. The motor is structured to form axial grooves 14 in the vicinity of a bearing holding part 13 integrally molded with the resin 7 on the side opposite the bracket 12. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は主に電気機器に搭載される樹脂で一体成形したモールド電動機に関する。 The present invention mainly relates to a molded electric motor integrally formed with a resin mounted on an electric device.

従来、この種の電動機においては、固定子をモールド成形した電動機が知られている（例えば特許文献１参照）。 Conventionally, in this type of electric motor, an electric motor in which a stator is molded is known (for example, see Patent Document 1).

以下、その電動機について、図７を参照しながら説明する。 Hereinafter, the electric motor will be described with reference to FIG.

図７に示すように、固定子１０１に電子部品１０２を実装したプリント基板１０３が装着され、樹脂により一体成形により、外郭の背面が平らな構造のモールド電動機１０４としていた。
特開２００５―９４８４１号公報 As shown in FIG. 7, a printed circuit board 103 on which an electronic component 102 is mounted is mounted on a stator 101, and a molded motor 104 having a flat outer back surface is formed by integral molding with resin.
JP 2005-94841 A

このような従来のモールド電動機では、発熱する電子部品により樹脂を通して熱が伝わり、軸受けが発熱するため、軸受けのグリスの劣化など長寿命化に課題があり、モールド電動機の長寿命化が難しいという課題があった。 In such conventional mold motors, heat is transmitted through the resin by the heat generating electronic parts, and the bearings generate heat. was there.

本発明は、このような従来の課題を解決するものであり、軸受けの長寿命化を図ることができるモールド電動機を提供することを目的としている。 The present invention solves such a conventional problem, and an object of the present invention is to provide a molded electric motor capable of extending the life of a bearing.

本発明は、上記課題を解決するために、固定子鉄心に絶縁体を介して駆動コイルを巻装した固定子と、電子部品を実装したプリント基板と、前記固定子と前記プリント基板とを樹脂で一体成形したモールド固定子と、前記固定子鉄心に対向して回転可能に保持された磁石回転子と、前記磁石回転子の中心を通る軸と、前記軸を保持する軸受けと、前記モールド固定子に圧入され前記軸受けを保持する鋼板のブラケットからなる電動機において、前記ブラケットの反対側の樹脂で一体成形された軸受け保持部の近傍に軸方向の溝を設けたものである。 In order to solve the above problems, the present invention provides a stator in which a drive coil is wound around a stator core via an insulator, a printed circuit board on which electronic components are mounted, and the stator and the printed circuit board. An integrally molded mold stator, a magnet rotor rotatably held facing the stator core, an axis passing through the center of the magnet rotor, a bearing holding the axis, and the mold fixing In an electric motor comprising a steel plate bracket that is press-fitted into a child and holds the bearing, an axial groove is provided in the vicinity of a bearing holding portion that is integrally formed of resin on the opposite side of the bracket.

この手段により、軸受けの長寿命化を図ることができるモールド電動機が得られる。 By this means, a molded electric motor capable of extending the life of the bearing can be obtained.

本発明によれば、固定子鉄心に絶縁体を介して駆動コイルを巻装した固定子と、電子部品を実装したプリント基板と、前記固定子と前記プリント基板とを樹脂で一体成形したモールド固定子と、前記固定子鉄心に対向して回転可能に保持された磁石回転子と、前記磁石回転子の中心を通る軸と、前記軸を保持する軸受けと、前記モールド固定子に圧入され前記軸受けを保持する鋼板のブラケットからなる電動機において、前記ブラケットの反対側の樹脂で一体成形された軸受け保持部の近傍に軸方向の溝を設けることにより、軸受けの長寿命化を図ることができるという効果のあるモールド電動機を提供できる。 According to the present invention, a stator in which a drive coil is wound around a stator iron core via an insulator, a printed circuit board on which electronic components are mounted, and mold fixing in which the stator and the printed circuit board are integrally molded with resin. A rotor that is rotatably held facing the stator core, a shaft that passes through the center of the magnet rotor, a bearing that holds the shaft, and a bearing that is press-fitted into the mold stator. In the electric motor composed of a steel plate bracket for holding the bearing, it is possible to extend the life of the bearing by providing an axial groove in the vicinity of the bearing holding portion integrally formed with the resin on the opposite side of the bracket. A molded electric motor can be provided.

本発明の第１の発明は、固定子鉄心に絶縁体を介して駆動コイルを巻装した固定子と、電子部品を実装したプリント基板と、前記固定子と前記プリント基板とを樹脂で一体成形したモールド固定子と、前記固定子鉄心に対向して回転可能に保持された磁石回転子と、前記磁石回転子の中心を通る軸と、前記軸を保持する軸受けと、前記モールド固定子に圧入され前記軸受けを保持する鋼板のブラケットからなる電動機において、前記ブラケットの反対側の樹脂で一体成形された軸受け保持部の近傍に軸方向の溝を設けることにより、発熱する電子部品と軸受け保持部の間に、熱伝導率の極めて低い空気層を入れることができるため、軸受け保持部への熱の伝導を低下させ、軸受けの発熱を防ぎ、軸受けの長寿命化できるという作用を有する。 A first aspect of the present invention is a stator in which a drive coil is wound around a stator iron core via an insulator, a printed board on which electronic components are mounted, and the stator and the printed board are integrally formed of resin. A molded stator, a magnet rotor rotatably held facing the stator core, an axis passing through the center of the magnet rotor, a bearing holding the axis, and press-fitting into the mold stator In the electric motor comprising the steel plate bracket for holding the bearing, by providing an axial groove in the vicinity of the bearing holding portion integrally formed with the resin on the opposite side of the bracket, the heat generating electronic component and the bearing holding portion are Since an air layer having a very low thermal conductivity can be inserted between them, heat conduction to the bearing holding portion is reduced, heat generation of the bearing can be prevented, and the bearing life can be extended.

また、第２の発明は、溝を円形の形状とすることにより、軸受け保持部が空気層に３６０度を囲まれるため、軸受け保持部への熱の伝導を低下させ、軸受けの発熱を防ぎ、軸受けの長寿命化できるという作用を有する。 Moreover, since the bearing holding part is surrounded by 360 degrees in the air layer by making the groove into a circular shape, the second invention reduces heat conduction to the bearing holding part and prevents heat generation of the bearing. It has the effect of extending the life of the bearing.

また、第３の発明は、溝を円弧状に複数個設けることにより、樹脂で一体成形された軸受け保持部の機械的強度を高めることができるという作用を有する。 Further, the third invention has an effect that the mechanical strength of the bearing holding portion integrally formed with resin can be increased by providing a plurality of grooves in an arc shape.

また、第４の発明は、溝をモールド固定子の外郭側に設けることにより、軸受け保持部の熱をモールド電動機の外側に放出し、軸受けの発熱を防ぎ、軸受けの長寿命化できるという作用を有する。 In addition, the fourth invention has an effect that the groove is provided on the outer side of the mold stator to release the heat of the bearing holding portion to the outside of the mold motor, thereby preventing the bearing from generating heat and extending the life of the bearing. Have.

また、第５の発明は、溝を磁石回転子側に設けることにより、外郭の背面に凹凸をなくし、デザイン性に優れるという作用を有する。 Moreover, 5th invention has the effect | action which eliminates an unevenness | corrugation in the back surface of an outer shell and is excellent in design property by providing a groove | channel on the magnet rotor side.

また、第６の発明は、溝をモールド固定子の外郭側と磁石回転子側との両方に設けることにより、発熱する電子部品と軸受け保持部との樹脂の熱伝達経路を長くでき、軸受け保持部への熱の伝導を更に低下させ、軸受けの長寿命化できるという作用を有する。 In the sixth aspect of the invention, by providing grooves on both the outer side of the mold stator and the magnet rotor side, the heat transfer path of the resin between the heat generating electronic component and the bearing holding portion can be lengthened, and the bearing holding It has the effect of further reducing the heat conduction to the part and extending the life of the bearing.

また、本モールド電動機を換気送風装置に搭載することにより、換気送風装置の長寿命化ができるという作用を有する。 Moreover, it has the effect | action that the lifetime of a ventilation air blower can be extended by mounting this mold motor in a ventilation air blower.

以下、本発明の実施の形態について図面を参照しながら説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

（実施の形態１）
本発明の第１の実施の形態について、図１〜図６を参照しながら説明する。 (Embodiment 1)
A first embodiment of the present invention will be described with reference to FIGS.

図１〜図６に示すように、本実施の形態によるモールド電動機１５は次のような構成である。すなわち、固定子４は、固定子鉄心１に絶縁体２を介して駆動コイル３を巻装したものである。プリント基板６には電子部品５を実装し、固定子４と前記プリント基板６とを樹脂７で一体成形してモールド固定子８を形成する。（このモールド固定子８の樹脂７部分には、磁石回転子９の軸受け１１を挿入する軸受け保持部が設けられている。）磁石回転子９は、回転軸１０を中心に固定子鉄心１に対向して回転可能に保持されている。回転軸１０には、回転軸１０を保持する軸受け１１が２ヶ所に設けられ、一方の軸受け１１を設けた端部を樹脂モールドされたモールド固定子８の所定位置（軸受け保持部）に挿入される。さらに反対側の軸受け１１は、鋼板のブラケット１２によって、モールド固定子８に保持されている。ブラケット１２の回転軸１０方向の反対側の樹脂７部分には、軸受け保持部１３の近傍に軸方向の溝１４を設けている。この溝１４は、軸受け１１の周囲を囲むようにモールド固定子８の外郭側に設けている。 As shown in FIGS. 1-6, the mold motor 15 by this Embodiment is the following structures. That is, the stator 4 is obtained by winding the drive coil 3 around the stator core 1 via the insulator 2. The electronic component 5 is mounted on the printed circuit board 6, and the stator 4 and the printed circuit board 6 are integrally formed with the resin 7 to form the mold stator 8. (The resin 7 portion of the mold stator 8 is provided with a bearing holder for inserting the bearing 11 of the magnet rotor 9.) The magnet rotor 9 is attached to the stator core 1 around the rotation shaft 10. Oppositely held rotatably. The rotary shaft 10 is provided with two bearings 11 for holding the rotary shaft 10, and the end provided with one of the bearings 11 is inserted into a predetermined position (bearing holding portion) of the resin-molded mold stator 8. The Further, the bearing 11 on the opposite side is held by the mold stator 8 by a steel plate bracket 12. An axial groove 14 is provided in the vicinity of the bearing holder 13 in the resin 7 portion on the opposite side of the bracket 12 in the direction of the rotation axis 10. The groove 14 is provided on the outer side of the mold stator 8 so as to surround the bearing 11.

このような構成のモールド電動機１５を駆動すると、プリント基板６において発熱することになるが、この発生した熱は、溝１４でできた空間によって軸受け１１に伝わりにくくなる。すなわち、軸受け１１が高温になることを防いで、グリスの劣化速度を低減し、その結果、軸受け１１の長寿命化を図ることができるという効果のあるモールド電動機１５を提供できる。 When the mold motor 15 having such a configuration is driven, heat is generated in the printed circuit board 6, but the generated heat is hardly transmitted to the bearing 11 by the space formed by the grooves 14. That is, it is possible to provide the molded motor 15 that has an effect of preventing the bearing 11 from becoming high temperature, reducing the grease deterioration rate, and extending the life of the bearing 11 as a result.

また、溝１４は、モールド固定子８の外郭側に設けているので、軸受け保持部１３の熱をモールド電動機１５の外側に放出し、軸受け１１に熱が篭ることを防ぎ、軸受け１１の長寿命化できるという作用を有する。 Further, since the groove 14 is provided on the outer side of the mold stator 8, the heat of the bearing holder 13 is released to the outside of the mold motor 15 to prevent the heat from being applied to the bearing 11, and the long life of the bearing 11 It has the effect that it can be made.

また、図３に示すように、溝１４ａは、回転軸１０を中心とした円形の形状としている。このような構成によれば、軸受け保持部１３が空気層に３６０度囲まれるため、軸受け保持部１３への熱の伝導を低下させ、軸受け１１の発熱を防ぎ、軸受け１１の長寿命化できるという作用を有する。 Further, as shown in FIG. 3, the groove 14 a has a circular shape centered on the rotation shaft 10. According to such a configuration, since the bearing holding portion 13 is surrounded by 360 degrees in the air layer, heat conduction to the bearing holding portion 13 is reduced, heat generation of the bearing 11 is prevented, and the life of the bearing 11 can be extended. Has an effect.

また、図４に示すように、溝１４ｂは、回転軸１０を中心として円弧状に複数個設けてもよい。この構成によれば、樹脂７で一体成形された軸受け保持部１３の機械的強度を高めることができる。 Further, as shown in FIG. 4, a plurality of grooves 14 b may be provided in an arc shape around the rotation shaft 10. According to this configuration, the mechanical strength of the bearing holder 13 integrally formed with the resin 7 can be increased.

また、図５に示すように、溝１４ｄは、磁石回転子９側に設けてもよい。このような構成によれば、外郭の背面１６に凹凸をなくし、デザイン性に優れたものとなる。 Further, as shown in FIG. 5, the groove 14d may be provided on the magnet rotor 9 side. According to such a configuration, the back surface 16 of the outer shell is eliminated and the design is excellent.

また、図６に示すように、溝１４ｅをモールド固定子８の外郭側と磁石回転子９側との両方に設けることにより、発熱する電子部品５と軸受け保持部１３との樹脂７の熱伝達経路を長くでき、軸受け保持部１３への熱の伝導を更に低下させ、軸受け１１の長寿命化できるという作用を有する。 Further, as shown in FIG. 6, by providing the groove 14 e on both the outer side of the mold stator 8 and the magnet rotor 9 side, heat transfer of the resin 7 between the electronic component 5 that generates heat and the bearing holder 13. The path can be lengthened, the heat conduction to the bearing holding portion 13 can be further reduced, and the life of the bearing 11 can be extended.

本発明にかかるモールド電動機は、発熱する電子部品から軸受け保持部への熱の伝導を低下させ、軸受けの発熱を防ぎ、軸受けの長寿命化できるため、換気装置などの小風量機器の搭載や、ファンモータへの搭載が有用である。 The mold motor according to the present invention reduces the heat conduction from the heat generating electronic components to the bearing holding part, prevents heat generation of the bearing, and can extend the life of the bearing. Mounting on a fan motor is useful.

本発明の実施の形態１の軸受け保持部の近傍に軸方向の溝を設けたモールド電動機の断面図Sectional drawing of the mold motor which provided the groove | channel of the axial direction in the vicinity of the bearing holding | maintenance part of Embodiment 1 of this invention. 同固定子の正面図Front view of the stator 同モールド電動機の溝を円形の形状としたことを示す背面図Rear view showing that the groove of the mold motor has a circular shape 同モールド電動機の溝を円弧状に複数個設ける形状としたことを示す背面図Rear view showing a shape in which a plurality of grooves in the mold motor are provided in an arc shape. 同モールド電動機の溝を磁石回転子側に設けたことを示す断面図Sectional drawing which shows having provided the groove | channel of the mold motor in the magnet rotor side 同モールド電動機の溝をモールド固定子の外郭側と磁石回転子側との両方に設けたことを示す断面図Sectional drawing which shows having provided the groove | channel of the mold motor in both the outer side of a mold stator, and the magnet rotor side 従来の外郭の背面が平らな構造のモールド電動機の断面図Sectional view of a conventional molded motor with a flat back surface

Explanation of symbols

１固定子鉄心
２絶縁体
３駆動コイル
４固定子
５電子部品
６プリント基板
７樹脂
８モールド固定子
９磁石回転子
１０回転軸
１１軸受け
１２ブラケット
１３軸受け保持部
１４溝
１４ａ溝
１４ｂ溝
１４ｄ溝
１４ｅ溝
１５モールド電動機
１６背面 DESCRIPTION OF SYMBOLS 1 Stator core 2 Insulator 3 Drive coil 4 Stator 5 Electronic component 6 Printed circuit board 7 Resin 8 Mold stator 9 Magnet rotor 10 Rotating shaft 11 Bearing 12 Bracket 13 Bearing holding portion 14 Groove 14a Groove 14b Groove 14d Groove 14e Groove 15 Mold motor 16 Back

Claims

A stator in which a drive coil is wound around a stator iron core via an insulator, a printed circuit board on which electronic components are mounted, a mold stator in which the stator and the printed circuit board are integrally formed of resin, and the stator A magnet rotor rotatably held facing the iron core, a shaft passing through the center of the magnet rotor, a bearing holding the shaft, and a steel plate bracket press-fitted into the mold stator to hold the bearing An electric motor comprising: a molded electric motor, wherein an axial groove is provided in the vicinity of a bearing holder integrally formed of resin on the opposite side of the bracket.

The mold motor according to claim 1, wherein the groove has a circular shape centered on the shaft.

The mold motor according to claim 1, wherein a plurality of the grooves are provided in an arc shape around the axis.

4. The capacitor motor according to claim 2, wherein the groove is provided on the outer side of the mold stator.

4. The capacitor motor according to claim 2, wherein the groove is provided on the magnet rotor side.

The capacitor | condenser motor of Claim 2 or Claim 3 which provided the said groove | channel in both the outer side of a mold stator, and the magnet rotor side.

A ventilation blower equipped with the molded electric motor according to claim 1.