JPS6082973U

JPS6082973U - Electric motor

Info

Publication number: JPS6082973U
Application number: JP17359883U
Authority: JP
Inventors: 悟鈴木
Original assignee: 日本ビクター株式会社
Priority date: 1983-11-09
Filing date: 1983-11-09
Publication date: 1985-06-08

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の電動機の縦断面図、第２図はこの考案の
電動機の一実施例の縦断面図で回転軸に荷重が加わらな
い状態を示す図、第３図は同回転軸に荷重が加わった状
態を示す図、第４図はこの考案の電動機の他の実施例の
縦断面図で回転軸に荷重が加わらない状態を示す図であ
る。１・・・軸受、１ａ・・・下端、２・・・固定子用盤状
ヨーク、３・・・プリント基板、４・・・電機子巻線、
５・・・回転子用盤状ヨーク、５ａ・・・回転子用盤状
ヨークの周縁部、６・・・回転駆動用の永久磁石、７・
・・回転軸、７ａ・・・下端、８・・・スラスト軸受、
９・・・ターンチーフル、１０・・・ロータブッシング
、Ｇ１．Ｇ２、Ｇ３・・・空隙。Fig. 1 is a longitudinal sectional view of a conventional electric motor, Fig. 2 is a longitudinal sectional view of an embodiment of the electric motor of this invention, showing a state in which no load is applied to the rotating shaft, and Fig. 3 is a longitudinal sectional view of an embodiment of the electric motor of this invention. FIG. 4 is a vertical sectional view of another embodiment of the electric motor of this invention, showing a state in which no load is applied to the rotating shaft. DESCRIPTION OF SYMBOLS 1... Bearing, 1a... Lower end, 2... Platy yoke for stator, 3... Printed circuit board, 4... Armature winding,
5... Disc-shaped yoke for rotor, 5a... Periphery of disc-shaped yoke for rotor, 6... Permanent magnet for rotational drive, 7.
... Rotating shaft, 7a... Lower end, 8... Thrust bearing,
9... Turn tip full, 10... Rotor bushing, G1. G2, G3... air gap.

Claims

[Scope of utility model registration request]

An armature winding attached to a printed circuit board is provided on the lower surface of the stator plate-like yoke to which the bearing is fixed, and a permanent magnet for rotational drive is fixed on the armature winding and the rotor plate-like yoke. are arranged facing each other, and a rotating shaft is fixed at the center of this plate-like rotor yoke, and a thrust bearing is provided at the lower end of this rotating shaft, so that no axial load is applied to the rotating shaft. When the permanent magnet is attracted to the printed circuit board and armature winding side by the attractive force of the permanent magnet,
A part of the stator side and a part of the rotor side are in contact with each other so that the upper surface of this permanent magnet does not come into contact with the printed circuit board or the lower surface of the armature winding and a slight air gap is created. An electric motor configured such that when a load is applied and a lower end of the permanent magnet contacts a thrust bearing, a predetermined gap is created between the upper surface of the permanent magnet and the lower surface of the printed circuit board or armature winding.