JPH02110954U

JPH02110954U -

Info

Publication number: JPH02110954U
Application number: JP1915689U
Authority: JP
Priority date: 1989-02-21
Filing date: 1989-02-21
Publication date: 1990-09-05

Description

[Brief explanation of drawings]

第１図はこの考案による電動機の一実施例をロ
ータケースについて示すロータケースの斜視図、
第２図は同じく第１図におけるＡ矢視図、第３図
はロータケースに永久磁石を固定した状態を示す
説明図、第４図は永久磁石の断面図、第５図のイ
，ロはこの考案による他の電動機の一実施例をロ
ータケースについて示すロータケースの正面図と
要部の断面図、第６図のイ，ロは同じく永久磁石
の正面図と要部の断面図、第７図は従来例として
の電動機を一部を断面にして示す正面図である。
図において、１はロータケース、２は永久磁石、
３は回転軸、４は軸受、５は軸受ホルダー、６は
固定子鉄心、７は磁石取付部、８はばね片、９は
リング溝、１０は突起、１１は凹部である。なお
、図中同一符号は、同一又は相当部分を示す。 FIG. 1 is a perspective view of a rotor case showing an embodiment of the electric motor according to this invention;
Figure 2 is also a view in the direction of arrow A in Figure 1, Figure 3 is an explanatory diagram showing the permanent magnet fixed to the rotor case, Figure 4 is a sectional view of the permanent magnet, and A and B in Figure 5 are A front view and a sectional view of the main parts of the rotor case showing an embodiment of another electric motor according to this invention, FIG. The figure is a front view showing a part of a conventional electric motor in cross section.
In the figure, 1 is a rotor case, 2 is a permanent magnet,
3 is a rotating shaft, 4 is a bearing, 5 is a bearing holder, 6 is a stator core, 7 is a magnet mounting portion, 8 is a spring piece, 9 is a ring groove, 10 is a protrusion, and 11 is a recess. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims

[Claims for Utility Model Registration] (1) A stator core fixed to a bearing holder that rotatably supports a rotating shaft via a bearing, and a stator core that faces the stator core with a gap in the radial direction. In an outer rotor type electric motor having a permanent magnet fixed to a metal rotor case fixed to the rotating shaft, a cylindrical magnet mounting part is formed in the rotor case, and a cylindrical magnet mounting part is formed inside the magnet mounting part. On the other hand, an electric motor is provided with a magnet fixing spring piece that applies an elastic holding force to the outer periphery of the permanent magnet that is fitted into the permanent magnet and fixes the permanent magnet. (2) A stator core fixed to a bearing holder that rotatably supports the rotating shaft via a bearing, and a stator core fixed to the rotating shaft so as to face the stator core with a gap in the radial direction. In an outer rotor type electric motor having a permanent magnet fixed to a metal rotor case, a cylindrical magnet mounting part is formed in the rotor case, and a protrusion is provided on the inner peripheral surface of the magnet mounting part, The permanent magnet is provided with a recess on its outer peripheral surface that fits into the projection,
An electric motor characterized in that a permanent magnet is fixed by fitting the protrusion and the recess.