Motor permanent magnet fixing device

Abstract

A motor permanent magnet fixing device solves the problem that in the prior art, a permanent magnet in a permanent magnet motor can easily fall off and comprises permanent magnets, a rotor support and a fixing piece. The rotor support and the fixing piece fix the permanent magnets. The motor permanent magnet fixing device is characterized in that the fixing piece comprises a non-permeability fixing block and a non-permeability inner hexagon bolt, each permanent magnet is provided with a locating slope, the non-permeability fixing block is provided with a slope face and a limiting face respectively, the length of the slope face is the same as the length of the locating slope of each permanent magnet, the threads of the bolt penetrate through a through hole of the rotor support and are connected with a thread hole of the non-permeability fixing block, the slope face of the non-permeability fixing block is matched with the locating slope of the permanent slope in inclined angle, tight contacting is achieved, and the non-permeability fixing block is used for fixing each permanent magnet on the rotor support. The motor permanent magnet fixing device is simple in structure, reasonable in design, easy to manufacture and capable of achieving fixing of the permanent magnets in a motor under any air gap size, the permanent magnets are evenly distributed and can be effectively prevented from falling off, mounting efficiency and permanent magnet using rate are improved, and permanent magnet materials are saved.

Description

technical field [0001] The invention relates to a fixing piece for a permanent magnet of an outer rotor of a motor, in particular to a fixing device for a permanent magnet of a motor that can effectively prevent the permanent magnet from moving or falling off due to the aging of an adhesive. Background technique [0002] Usually, the permanent magnet of the motor is fixed by using an adhesive to bond the permanent magnet to the surface of the rotor. Due to the influence of factors such as the change of the internal temperature of the motor and the bad use environment, there is a problem that the aging of the adhesive accelerates, and eventually fails to cause the permanent magnet of the motor to fall off, which affects the service life of the permanent magnet motor, thus restricting the permanent magnet motor. application. In order to solve the above problems, some permanent magnet fixing mechanisms have been reported in the open literature: in the technical scheme of "perm...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a permanent magnet fixing device for a motor, which solves the problem that the permanent magnet in the permanent magnet motor in the prior art moves and falls off when the adhesive fails. It has a simple structure, a reasonable design, and is easy to manufacture. Realize the fixation of the permanent magnet in the motor under any air gap size, not only effectively prevent the permanent magnet from moving and falling off, ensure the uniform distribution of the permanent magnet, but also improve the installation efficiency and the utilization rate of the permanent magnet, and save the permanent magnet material

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