Brush electric motor

Abstract

A brush electric motor comprises a main case, a crankshaft and a high end cover, wherein, the main case is connected with the high end cover, an end cover is arranged between the main case and the high end cover, the crankshaft is positioned inside the main case and the high end cover and is fixed with a rotor and an electric conduction slide ring, and the rotor is provided with a rotor lead wire which is connected with the electric conduction slide ring. The brush electric motor has the main design that a round dust blocking fixed plate is fixed between the rotor and the electric conduction slide ring on the crankshaft, and the rotor lead wire passes through the dust blocking fixed plate; furthermore, the dust blocking fixed plate is corresponding to the end cover by adopting clearance fit. Due to the design of the dust blocking fixed plate, carbon powder granules produced by brush friction can be effectively prevented from entering between a stator and a rotor, and the safety factor of the work environment inside the electric motor can be improved; meanwhile, the rotor lead wire can be fixed and buffered, so that the centrifugal tension applied on the rotor lead wire can be reduced when the electric motor runs at high speed, and the service life thereof can be prolonged.

Description

technical field [0001] The invention relates to a motor with a brush, in particular to a motor with a brush provided with dust blocking and fixing devices. Background technique [0002] At present, the brushes (conductive slip rings and collector rings) of brushed motors commonly used are mostly made of carbon conductive materials, which will produce a lot of tiny carbon powder after long-term friction. However, there is no isolation device between the brush chamber and the rotor of most brushed motors, so part of the carbon powder generated will fall between the stator and the rotor as the motor runs. If it accumulates too much, the stator and rotor will be damaged. conduction, causing a safety hazard. [0003] At the same time, the rotor of the commonly used brushed motor and the conductive slip ring are connected by rotor lead wires. With the high-speed operation of the rotor, a large centrifugal force will be generated on the rotor lead wires, which also keeps the rotor...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a brushed motor, which solves the potential safety hazard caused by the carbon powder produced when the commonly used brushed motor is running, and at the same time solves the problem of low life of the rotor lead wires due to long-term centrifugal tension

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