JPH0134532Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement in the fixing structure of a stator of a rotating electric machine, particularly between a magnetic pole and a cylindrical holding frame attached to the inner periphery thereof.

Conventionally, there has been a magnet motor of this type as shown in FIG. That is, in FIG. 1, 1 is a magnet motor, 2 is its stator, and includes a cylindrical yoke 3 made of a mild steel plate member, and a magnetic pole (made of a ferrite permanent magnet material) fixed to the inner peripheral surface of this yoke. Paul) 4
It consists of Reference numeral 5 denotes a cylindrical holding frame made of a non-magnetic metal plate member, which is fitted onto the inner peripheral surface of the magnetic pole 4 to protect the magnetic pole 4. Reference numeral 6 denotes an armature rotatably mounted in the inner circumferential space of the holding frame 5 through a gap g.

Next, the operation of the above configuration will be explained. When the armature 6 is connected to an external power supply (battery) and energized, it rotates under the excitation force of the magnetic poles 4.

In this conventional device, a cylindrical holding frame 5 with a thickness of t is interposed between the magnetic pole 4 and the armature 6, and therefore the gap between the magnetic pole 4 and the armature 6 is increased by this amount. Therefore, when the holding frame 5 is made of a non-magnetic material, there is a drawback that the magnetic circuit resistance of the device increases and the device characteristics deteriorate.

This idea was made in order to eliminate the above-mentioned drawbacks of the conventional technology.A tapered part is provided on the side surface of the magnetic pole, and a window part is provided on the outer periphery of the cylindrical holding frame, and these parts are fitted into each other. This provides a stator that can be mechanically held reliably without degrading device characteristics.

An embodiment of this invention will be described below with reference to FIG. That is, in FIG. 2, 101 is a magnet motor, 201 is a stator, and 401 is a magnetic pole fixed to the inner peripheral surface of the yoke 3 and made of a ferrite permanent magnet material, the end surface of which forms a tapered surface 401a having an angle θ. are doing. Reference numeral 501 denotes a cylindrical frame-shaped holding frame made of an aluminum plate member, and a plurality of windows 501a (four in the figure) are formed on the outer periphery of the holding frame. It will be worn. In this way, as shown in FIG. 2a, the holding frame 501 can be disposed without increasing the gap between the magnetic pole 401 and the outer peripheral surface of the armature 601, and the effect is that the electrical characteristics of the device are not deteriorated. play.

In the above embodiment, the case where the present invention is applied to a magnet motor has been described, but it goes without saying that the present invention can also be applied to a stator of a DC machine of other types, such as a magnet type generator.

As described above, according to this invention, the side surfaces of the magnetic poles (magnets) are tapered, and the cylindrical holding frame attached to the inner periphery is provided with a window so that they fit into each other. , a stator capable of mechanically holding the magnetic poles without deteriorating the device characteristics can be obtained.

[Brief explanation of the drawing]

Figure 1a is a sectional view of the main parts of a conventional magnet motor, Figures 1b and c are perspective views of its main components,
FIG. 2a is a sectional view of a main part of a magnet motor according to an embodiment of the invention, and FIGS. 2b and 2c are perspective views of its main constituent members. In the figure, 2,201 is a stator, 3 is a yoke, 4,4
01 is a magnetic pole, 6 is an armature, 401a is a taper part,
501 is a holding frame, and 501a is a window portion. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] (1) A magnetic pole made of a ferrite permanent magnet material is attached to the inner circumferential surface of a cylindrical yoke, in which a tapered part is provided on the side surface of the magnetic pole, and the tapered part is 1. A stator for a rotating electrical machine, comprising a thin cylindrical holding frame having a window portion that is secured to the magnetic pole along the inner circumferential surface of the magnetic pole. (2) A stator for a rotating electric machine according to claim 1, wherein the cylindrical holding frame is made of a thin aluminum plate member.