JPH0134528Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an improvement of a magnetic pole fixing device for a rotating electric machine, particularly a positioning device for a magnet attached to a stator of a magnet motor.

[Prior art]

As a conventional magnetic pole fixing device for this type of rotating electric machine, there is one shown in Japanese Utility Model Publication No. 49-44406,
It was constructed as shown in FIGS. 1 and 2.

That is, in FIGS. 1 and 2, 1 is a yoke of a magnet motor formed into a cylindrical shape by pressing a mild steel plate member, 2 is an arc-shaped magnet serving as a field pole, and 3 is a spring steel plate. This magnet fixing member has a protrusion 31 formed by bending and a protrusion 32 that positions and engages the axial end surface 21 of the arc-shaped magnet 2.

In this conventional device, an arc-shaped magnet 2 is positioned and fixed to the inner circumferential surface of a yoke 1 by a magnet fixing member 3. However, the mounting accuracy of the magnet fixing member 3 is not sufficient, and when the number of magnets 2 increases, the mounting operation takes time.

[Summary of the idea]

This invention was made in order to eliminate the drawbacks of the conventional ones, and it consists of a plurality of spring parts that come into contact with the end faces of the magnetic poles attached to the yoke, and a connecting part that connects these spring parts with each other. The present invention provides a magnetic pole fixing device for a rotating electrical machine, which has a holding frame having a simple structure, and has excellent workability, precision, and reliability.

[Example of idea]

An embodiment of this invention will be described below with reference to FIGS. 3 to 7.

That is, in FIGS. 3 to 7, 4 is a yoke for the magnetic motor, 41 is a positioning protrusion that is stamped integrally with the yoke 4, and 5 is an electric resistance on the inner peripheral surface of the yoke 4. The auxiliary pole 6 is made of a soft iron rod firmly fixed by welding or the like, and is made by press working from a spring steel plate consisting of spring parts 61 and 62 and a band-shaped connecting part 63 that connects these spring parts to each other. Holding frame for fixing the magnetic pole integrally molded, 7 is holding frame 6
The main magnetic pole is made of a ferrite permanent magnet material and is elastically supported by spring parts 61 and 62. Here, two or more holding frames 6 are arranged on both sides of the main magnetic pole 7, and the pressing reaction force of the main magnetic pole 7 by the spring portion 62 is received by the protruding portion 41 provided on the yoke 4. The spring portion 61 is elastically stretched between the auxiliary pole 5 and the adjacent main magnetic pole 7, and by fixing the auxiliary pole 5 to the inner peripheral surface of the yoke 4 in advance, the spring portion 61 The main magnetic pole 7 is pressed toward the complementary magnetic pole 5 with a pressing force of 61.

With this structure, the main magnetic pole 7 is firmly held, the number of man-hours required for mounting the holding frame 6 is reduced, and the main magnetic pole 7 is easily engaged.

Although the installation of the main magnetic pole 7 has not been described in detail here, it is attached and fixed together with the auxiliary pole 5 to the inner peripheral surface of the yoke 4 using epoxy resin adhesive, etc., and then the holding frame 6 is attached to an automatic assembly machine. If the device is automatically installed using the above method, the strength of the device and the ease of assembly will be further improved.

Further, even if the attached main magnetic pole 7 falls off during use, it is held in place by the holding frame 6, thereby increasing the reliability of the device.

[Effect of idea]

As mentioned above, the magnetic fixing device for a rotating electric machine according to this invention has a structure in which the main magnetic pole is positioned and locked by the holding frame in which the spring part and the connecting part are integrated, so the structure is simple. Along with being cheaper,
Assembling accuracy and workability of the device are improved and reliability is improved.

[Brief explanation of the drawing]

Figures 1 and 2 show a conventional magnetic pole fixing device for this type of rotating electrical machine. Fig. 3 shows a perspective view of the main part, Fig. 4 shows a front view of the main part, and Fig. 5 shows an embodiment of the invention.
6 is a front view, and FIG. 7 is a developed view of the inner peripheral surface of FIG. 6. In the figure, 1 and 4 are yoke, 3 is a magnet fixing member, 5 is an auxiliary pole, 6 is a holding frame, 61 and 62 are spring parts, and 63
is a connecting portion, and 2 and 7 are main magnetic poles. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] It consists of a plurality of spring parts made of spring steel that come into contact with the end faces of the magnetic poles attached to the yoke, and connecting parts that connect these spring parts to each other. 1. A magnetic pole fixing device for a rotating electrical machine, comprising a pair of holding frames configured to abut respective end faces, and a pair of holding frames facing each other at axial ends of a magnetic pole.