JPS62132678U

JPS62132678U -

Info

Publication number: JPS62132678U
Application number: JP1891986U
Authority: JP
Priority date: 1986-02-14
Filing date: 1986-02-14
Publication date: 1987-08-21

Description

[Brief explanation of the drawing]

図面は本考案の実施例が示され、第１図は界磁
用マグネツトが回転子の界磁用マグネツトの場合
の直流モータの断面側面図、第２図は界磁用マグ
ネツトがカーリング治具に嵌められてカーリング
された断面側面図、第３図は界磁用マグネツトが
着磁される時の要部断面側面図、第４図は界磁用
マグネツトがヨークに嵌められる時の要部断面側
面図、第５図は界磁用マグネツトの中性点位置が
変えられた時の説明図、第６図は界磁用マグネツ
トが固定子の界磁用マグネツトの場合の直流モー
タの断面側面図、第７図は界磁用マグネツトの中
間部分が着磁範囲で上側と下側が着磁されない他
の実施例の要部断面側面図、第８図は従来の直流
モータの界磁用マグネツトが軸方向の全面に着磁
されて厚さが厚い場合の要部断面側面図ａと厚さ
が薄くリングで位置決めされた要部断面側面図ｂ
と厚さが薄く段部で位置決めされた要部断面側面
図ｃである。３，８……電機子鉄芯、３ａ，８ａ……端面、
４，６……略カツプ状ヨーク、４ａ，６ａ……内
周面、４ｂ，６ｃ……底面、４ｃ，６ｂ……開口
側、５……円筒状の界磁用マグネツト、５ｂ……
一端面、５ｃ……他端面、１０……コイル、ｌ…
…着磁範囲。 The drawings show an embodiment of the present invention, and Fig. 1 is a cross-sectional side view of a DC motor in which the field magnet is a rotor field magnet, and Fig. 2 is a sectional side view of a DC motor in which the field magnet is a curling jig. Fig. 3 is a cross-sectional side view of the main part when the field magnet is magnetized, Fig. 4 is a cross-sectional side view of the main part when the field magnet is fitted into the yoke. 5 is an explanatory diagram when the neutral point position of the field magnet is changed, and FIG. 6 is a cross-sectional side view of the DC motor when the field magnet is a stator field magnet. Fig. 7 is a cross-sectional side view of another embodiment in which the middle part of the field magnet is magnetized and the upper and lower sides are not magnetized, and Fig. 8 is a sectional side view of the main part of a conventional DC motor in which the field magnet is magnetized in the axial direction. Main part cross-sectional side view a when the entire surface is magnetized and thick, and main part cross-sectional side view b when the main part is thin and positioned with a ring.
FIG. 3 is a cross-sectional side view c of the main part, which is thin and positioned at the stepped portion. 3, 8... Armature iron core, 3a, 8a... End face,
4, 6...approximately cup-shaped yoke, 4a, 6a...inner peripheral surface, 4b, 6c...bottom surface, 4c, 6b...opening side, 5...cylindrical field magnet, 5b...
One end surface, 5c...Other end surface, 10...Coil, l...
...magnetization range.

Claims

[Scope of utility model registration request]

A cylindrical field magnet mounted in contact with the inner peripheral surface of a substantially cup-shaped yoke, and an armature iron core around which a coil is wound, which is located opposite to the inner peripheral surface of the field magnet. In the DC motor, one end surface of the magnet is in contact with the bottom surface of the yoke, the other end surface is located on the same side as the end surface of the armature core on the opening side of the yoke, or is located on the opening side of the end surface, and the axial length of the magnet is A DC motor field magnet with a portion of it magnetized.