JPS58133153A - Rotor of motor - Google Patents

Rotor of motor

Info

Publication number
JPS58133153A
JPS58133153A JP57014628A JP1462882A JPS58133153A JP S58133153 A JPS58133153 A JP S58133153A JP 57014628 A JP57014628 A JP 57014628A JP 1462882 A JP1462882 A JP 1462882A JP S58133153 A JPS58133153 A JP S58133153A
Authority
JP
Japan
Prior art keywords
rotor
magnet
rotor core
central shaft
injection molding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP57014628A
Other languages
Japanese (ja)
Inventor
Koichi Kobayashi
光一 小林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seikosha KK
Original Assignee
Seikosha KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seikosha KK filed Critical Seikosha KK
Priority to JP57014628A priority Critical patent/JPS58133153A/en
Publication of JPS58133153A publication Critical patent/JPS58133153A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2726—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
    • H02K1/2733—Annular magnets

Abstract

PURPOSE:To improve the precision of the dimensions of a magnet and thereby increase productivity by a method wherein a plastic binder magnet is formed monolithically, by injection molding, on a rotor core made of plastic. CONSTITUTION:A rotor core is constituted by a central shaft member 2 having pivots 2a and 2b at the upper and lower ends, a flange member 3 provided in the lower part of the central shaft member 2, and a rotor pinion 4, all of which are molded monolithically from thermoplastic resin such as polyacetals. A plastic binder magnet which is formed by mixing ferrite in nylon, for instance, and to which injection molding can be applied is formed on the central shaft member 2 above the flange member 3 of the rotor core 1 by the injection molding, and thereby a magnet 5 is formed in one body with the rotor core 1.

Description

【発明の詳細な説明】 本発明は時針などに用いられるモータのロータに関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotor of a motor used for an hour hand or the like.

従来この種のロータは、ロータ真にカナとマグネットを
保持するための真に平行な複数本のアームとを一体的に
プラスチックで成形し、各アームの先端には係止爪を設
けてあり、ドーナツ状の焼結磁石をロータ真に嵌合して
係止爪を有するアームにて保持し、その上から磁石を脱
出不能に接着していた。しかし焼結磁石は寸法精度が悪
く、かつ生産性が低かった。また組立て工程にマグネッ
トのスナップ結合や接着作業などの二次加工が必要であ
った。Conventionally, this type of rotor has a rotor pinion and a plurality of truly parallel arms for holding the magnets, which are integrally molded of plastic, and a locking claw is provided at the tip of each arm. A donut-shaped sintered magnet was fitted into the rotor shaft and held by an arm having a locking claw, and the magnet was glued onto the arm so that it could not be removed. However, sintered magnets had poor dimensional accuracy and low productivity. In addition, the assembly process required secondary processing such as snap connection of magnets and adhesive work.

本発明によればロータカナを一体成形しているロータ真
に、２色ｒＩＬ形によりプラスチックバインダーマダネ
ッ）（ＩＩ！ＩＭ）製のマグネットを一体成形すること
により、マグネットの寸法精度を向上し、かつ生産性を
高めた性能のよいモータのロータを提供するものである
。According to the present invention, the dimensional accuracy of the magnet is improved by integrally molding a magnet made of a plastic binder Madane (II! IM) using a two-color rIL type into the rotor body in which the rotor pinion is integrally molded. The present invention provides a rotor for a motor with good performance and increased productivity.

本発明の実施例を図面に基づいて説明する。ロータ真１
はたとえばメリアセタールなどの熱可塑性樹脂からでき
ており、図に示すように上下両端にホゾ部２ａ、２−を
有する中心軸部２と、この軸部の下部に設けたつば部３
とロータカナ４とが一体成形しである。中心軸部２には
っは部５上にマグネッ）　５ｆＪ１２色成形により一体
的に成形しである。このマグネット５はナイｐンにフェ
ライトを混入してなる射出成形可能なプラスチックバイ
ンダーマグネットすなわちＰＢＭで形成しである。Embodiments of the present invention will be described based on the drawings. Rotor true 1
is made of thermoplastic resin such as meliacetal, and as shown in the figure, has a central shaft portion 2 having tenon portions 2a, 2- at both upper and lower ends, and a collar portion 3 provided at the bottom of this shaft portion.
and rotor pinion 4 are integrally molded. The center shaft part 2 has a magnet on the part 5.It is integrally molded by 5fJ12-color molding. The magnet 5 is made of an injection moldable plastic binder magnet, that is, PBM, which is made by mixing ferrite with knife.

このようなモータのロータを成形するには、まず射出成
、影線で上記した形状のロータ真１を射出成形し、続い
て同一成形機でロータ真１のつば部３上の軸部２にマグ
ネット５をＰＢＭで射出成形する。これにより図示のよ
うなモータのロータが成形できる。In order to mold the rotor of such a motor, first, the rotor stem 1 having the shape shown above with the shaded line is injection molded, and then the shaft part 2 on the collar part 3 of the rotor stem 1 is molded using the same molding machine. The magnet 5 is injection molded using PBM. This allows the rotor of the motor as shown in the figure to be formed.

以上のように本発明によれば、ロータ真にＰＢＭからな
るマグネットを２色成形したことにより、マグネットの
寸法精炭を従来の焼結マグネットより着しく向上するこ
とができ、射出成形可能であるので生産性を高くするこ
とができる。また２色成形によりロータ真とマグネット
とは一体的になっているので、接着などの二次加工を必
要とせず性能のよいロータを安価に制作することができ
るなどの効果がある。As described above, according to the present invention, by molding the magnet made of PBM in two colors at the rotor core, the size of the magnet can be significantly improved compared to conventional sintered magnets, and injection molding is possible. Therefore, productivity can be increased. Furthermore, since the rotor stem and magnet are integrated by two-color molding, there is no need for secondary processing such as adhesion, and a rotor with good performance can be produced at a low cost.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明の一実施例を示す縦断面図である。 １・・・・・ロータ真　　　　２・・・中心軸部４・・
・・・・ロータカナ　　　５・・・・・・マグネット以
　　上 出願人　　株式金社　精工舎The drawing is a longitudinal sectional view showing an embodiment of the present invention. 1... Rotor stem 2... Center shaft portion 4...
...Rota kana 5 ... Magnet or more Applicant Kinsha Co., Ltd. Seikosha

Claims (1)

【特許請求の範囲】[Claims] ロータカナを一体的に成形しであるプラスチック製のロ
ータ真と、このロータ真に２色成形により一体的に成形
しであるＰＢＭ（プラスチックノイイングーマグネット
）製のマグネットとからなることを特徴とするモータの
ロータ。It is characterized by consisting of a plastic rotor stem formed by integrally molding a rotor pinion, and a PBM (plastic neutral magnet) magnet formed integrally by two-color molding of this rotor stem. motor rotor.
JP57014628A 1982-02-01 1982-02-01 Rotor of motor Pending JPS58133153A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57014628A JPS58133153A (en) 1982-02-01 1982-02-01 Rotor of motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57014628A JPS58133153A (en) 1982-02-01 1982-02-01 Rotor of motor

Publications (1)

Publication Number Publication Date
JPS58133153A true JPS58133153A (en) 1983-08-08

Family

ID=11866456

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57014628A Pending JPS58133153A (en) 1982-02-01 1982-02-01 Rotor of motor

Country Status (1)

Country Link
JP (1) JPS58133153A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1037352C2 (en) * 2009-10-05 2011-04-06 Aeronamic B V Rotor assembly and electromotor with permanent magnets having reduced eddy current losses.
US11401974B2 (en) 2017-04-23 2022-08-02 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US11534565B2 (en) 2012-12-18 2022-12-27 Fisher & Paykel Healthcare Limited Impeller and motor assembly
US11571536B2 (en) 2011-07-13 2023-02-07 Fisher & Paykel Healthcare Limited Impeller and motor assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1037352C2 (en) * 2009-10-05 2011-04-06 Aeronamic B V Rotor assembly and electromotor with permanent magnets having reduced eddy current losses.
US11571536B2 (en) 2011-07-13 2023-02-07 Fisher & Paykel Healthcare Limited Impeller and motor assembly
US11534565B2 (en) 2012-12-18 2022-12-27 Fisher & Paykel Healthcare Limited Impeller and motor assembly
US11401974B2 (en) 2017-04-23 2022-08-02 Fisher & Paykel Healthcare Limited Breathing assistance apparatus

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