Permanent magnet motor rotor casing and manufacturing method thereof

Abstract

A rotor shell of a permanent magnet motor, which has a wheel disc and a wheel shell. The wheel disc and the wheel shell are coaxially assembled together. The radially outer end of the wheel disc is provided with an annular shoulder, and the outer end of the annular shoulder rests on the wheel. On the step of the inner wall of one end of the shell, and this end of the wheel shell is bent and fixed with the ring-shaped shoulder of the wheel disc. When making the roulette, an annular shoulder is formed on the radially outer end of the roulette; the raw material for making the wheel shell is a round tube, and a step is processed on the inner wall of one end of the round tube; when assembling, the outer end of the ring-shaped shoulder of the roulette is placed Place it on the step of the inner wall of one end of the round tube, then bend this end of the round tube and overlap and fix it with the annular shoulder of the wheel disc to obtain the rotor shell of the permanent magnet motor. The rotor housing of the permanent magnet motor in the present invention has simple structure, simplified manufacturing process, easy assembly operation and low manufacturing cost.

Description

technical field [0001] The invention relates to the improvement of the structure and manufacturing process of the rotor casing of a permanent magnet motor. Background technique [0002] Such as figure 1 As shown, the currently known permanent magnet motor rotor casing is composed of a wheel disc 1 and a wheel shell 2. The wheel disc 1 is usually a casting or a machined part for mounting the rotor shaft; the wheel shell 2 is generally a stamping part for Magnetic steel is installed, and the wheel disc 1 and the wheel shell 2 are coaxially fixed and assembled together with rivets 3 . When manufacturing, the wheel disc 1 should be processed by casting or machining process first, and the rivet holes should be processed on the wheel disc 1, and the wheel shell 2 should be produced by stamping and forming with a steel plate, and then the wheel disc 1 and the wheel shell 2 should be assembled. Fasten with rivets 3 after assembly. [0003] see figure 2 When making the wheel she...

AI Technical Summary

Problems solved by technology

[0003] see figure 2 When making the wheel shell 2, the disc-shaped blank 5 must be obtained by stamping and blanking with a steel plate, and then the disc-shaped blank 5 is stamped and stretched into a cylindrical wheel shell 2 finished product. The required stamping mold structure It is relatively complicated, and there are many corner scraps produced in the process of obtaining the disc-shaped blank 5, so the cost is relatively high, and the rivets are used for riveting during assembly, the operation is complicated, and the riveting will also affect the appearance of the product

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