Direct-current motor based on specific electric brush installation angle

Abstract

The invention relates to a direct-current motor based on a specific electric brush installation angle, which comprises a motor stator part and a rotor part, wherein the motor stator part is provided with a brush gear; the motor rotor part is provided with a reversing device; a brush head of the brush gear is in slide contact with the reversing device; and an included angle alpha between the brush head and a brush handle is 38 degrees. A welding spot of the brush head and a lead wire of the motor is formed through automatic welding, and rare earth materials are plated on reversing pieces of the reversing device and the brush head. According to the direct-current motor based on a specific electric brush installation angle, which is provided by the invention, the rare earth materials are plated on the reversing pieces of the reversing device and the brush head, so that the arc resistance of a reverser of a micromotor is improved, a main wear mechanism is converted from adhesive wear to abrasive wear, the phenomenon of abrasive dust collection in a groove is eliminated, and the reliability and the service life of the motor are remarkably improved; an automatic welding manner is adopted for the brush head and the lead wire of the motor, so that the probability of generation of crack of a plating layer of the motor is effectively reduced, and the manufacturing cost of the motor is reduced; and the included angle between the brush head and the brush handle selects an optimal angle, so that mechanical contact between the brush and the reversing device is favored, the mechanical loss is reduced to be minimum, the electrical contact performance is simultaneously improved, and the stability and the reliability of the product is improved.

Description

technical field [0001] The invention relates to a DC motor, in particular to a DC motor based on a specific brush installation angle. Background technique [0002] In most brushed DC motors, the brushes have brush wires (brush braids), and the current and voltage are introduced or drawn out by the action of the brushes and brush wires (brush braids). The brushes and commutator segments flow into the coils of the armature. However, in the process of brush welding, the phenomenon of brush coating bursting is often encountered. Some motor manufacturers are restricted by various factors (such as product scale, batch size, etc.), and instead of using automatic welding methods, they use traditional welding methods. Manual welding operation mode, so that if the brush coating bursts when welding the brush, it will cause damage to the operator's eyes, and after the brush coating bursts and falls off, the brush cannot continue to be used and is scrapped, resulting in an increase in m...

AI Technical Summary

Problems solved by technology

This angle is generally between 32-42 degrees. If the installation angle of the brush piece is too large, although the electrical contact performance is improved, it will cause rapid wear of the brush piece and the commutator;

[0005] The installation angle of the brush piece is too small, which will cause poor contact between the brush piece and the commutator, low electrical contact performance, and poor conversion efficiency

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