Brushless direct current motor sealing structure

Abstract

The invention provides a brushless direct current motor sealing structure which comprises a cover plate, a printed board assembly, a rear cover, a bearing, a printed board support, a motor end cover assembly and a motor rotor. The end of the motor rotor is arranged on the motor end cover assembly through the bearing. The cover plate is arranged at the end of the motor rotor in a sleeving mode and arranged in a mounting hole of the motor end cover assembly. The printed board support and the rear cover are sequentially arranged on the outer side of the motor end cover assembly in a sealing mode. A sealing ring A is arranged between the printed board support and the cover plate. The printed board assembly is further arranged between the printed board support and the rear cover and is fixed to the printed board support. According to the brushless direct current motor sealing structure, the printed board assembly is isolated from lubricating oil, the outside high temperature and the high temperature in a motor effectively, the lubricating oil is adopted to serve as the surrounding environment of the printed board assembly, and the brushless direct current motor with a Hall sensor can be used at a high speed at high temperature.

Description

technical field [0001] The invention relates to the technical field of a brushless direct current motor, in particular to a sealing structure of a brushless direct current motor. Background technique [0002] The brushless DC motor consists of a motor body and a driver, and is a typical mechatronic product. A brushless motor refers to a motor without a brush and a commutator (or slip ring), also known as a commutator-less motor. As early as the 19th century, when the motor was born, the practical motor produced was a brushless form, that is, an AC squirrel-cage asynchronous motor, which was widely used. However, asynchronous motors have many insurmountable defects, so that the development of motor technology is slow. Transistors were born in the middle of the last century, so brushless DC motors that use transistor commutation circuits instead of brushes and commutators came into being. This new brushless motor, called an electronically commutated DC motor, overcomes the ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above technical problems, the present invention provides a sealing structure of a brushless DC motor, the sealing structure of the brushless DC motor forms an independent cavity through the cover plate, the printed board bracket, and the rear cover to seal the printed board assembly It is effectively isolated from lubricating oil, which solves the problems that lubricating oil and high temperature will cause Hall components to fail and printed board components will be deformed when soaked in oil.

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