Self-locking structure of miniature brushless DC motor

Abstract

The invention provides a self-locking structure of a miniature brushless DC motor. The self-locking structure comprises a shell and an upper flange. The shell is cylindrical. The inner wall of the shell is a smooth surface. An internal thread is formed in the upper end of the inner wall of the shell. The lower end of the upper flange is provided with an external thread matched with the internal thread. An edge blocking part extending inward is arranged at the upper end of the upper flange. A vertical downward threaded hole is formed in the edge blocking part. A threaded groove corresponding tothe threaded hole is formed in the inner wall of the upper flange. A self-tapping threaded groove is formed in the lower portion of the threaded groove. By omitting a stud, the size of the shell is reduced; the upper flange and the shell are fixedly connected in a screw-thread fit mode, moreover the self-tapping threaded groove is formed in the position, below the threaded hole, of the inner wallof the upper flange, a self-tapping screw drills in the threaded hole, slicing is conducted on the self-tapping threaded groove, and the upper flange and the shell are matched in a thread combinationmode, thereby being more closely combined.

Description

technical field [0001] The invention relates to the field of brushless direct current motors, in particular to a self-locking structure of a miniature brushless direct current motor. Background technique [0002] The brushless DC motor consists of a motor body and a driver, and is a typical mechatronic brushless DC motor. The stator windings of the motor are mostly made into a three-phase symmetrical star connection, which is very similar to the three-phase asynchronous motor. Magnetized permanent magnets are attached to the rotor of the motor. In order to detect the polarity of the motor rotor, a position sensor is installed in the motor. The driver is composed of power electronic devices and integrated circuits, etc. Its functions are: to receive the start, stop, and brake signals of the motor to control the start, stop, and brake of the motor; to accept the signal of the position sensor and the forward and reverse signals to control the reverse The on-off of each power ...

AI Technical Summary

Problems solved by technology

[0003] Based on the excellent performance of the brushless DC motor, it needs to be applied in many fields. However, in the miniature brushless DC motor, the locking structure between the housing and the upper flange is generally provided with a long stud inside the housing, and then through Screws fix the upper flange in the housing; however, this method will occupy the space inside the housing and increase the volume of the motor, which is not conducive to the installation of micro motors

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