Carbon brush assembly for motor

Abstract

The invention relates to a carbon brush assembly for a motor. The carbon brush assembly comprises carbon brush plates, a carbon brush box, carbon brushes, volute springs and a carbon brush holder; the carbon brush box is of a groove structure; the outer end of the carbon brush box bridges the junctions of the carbon brush holder and the carbon brush plates, so that the length of the carbon brush box and the carbon brushes can be effectively increased; the volute springs are installed at the exterior of the carbon brush box and fixed to rivets through welding; the extension ends of the volute springs abut against the outer wall of the carbon brush box and extend into the carbon brush box from the outer end of the carbon brush box; and the torque ends of the volute springs are located in the carbon brush box and contact with the outer ends of the carbon brushes. With the above structure adopted, the inner spaces of the carbon brushes can be increased, the use length of the carbon brushes can be effectively increased, and the service life of the motor can be prolonged. The carbon brush assembly of the invention has the advantages of simple structure, excellent heat radiating performance, constant thrust of the carbon brushes, excellent contact between the carbon brushes and a commutator, high use efficiency of the carbon brushes and long service life.

Description

technical field [0001] The invention relates to the technical field of electric motors, in particular to a carbon brush assembly for electric motors. Background technique [0002] A brushed motor is a rotating motor that converts electrical energy into mechanical energy or converts mechanical energy into electrical energy with a built-in carbon brush device. It is the basis of all motors and has the characteristics of fast start, timely braking, smooth speed regulation in a wide range, and relatively simple control circuit. It is widely used in electric vehicles, electronic cooling fans and other products. Traditional brushed motors mostly use cylindrical compression springs. At the initial stage of motor use, when the motor is subjected to an external load, the spring shrinks and deforms, storing deformation energy. When the spring compression is the largest, the force is too large, resulting in excessive wear of the carbon brush; At the end of use, often due to the small ...

AI Technical Summary

Problems solved by technology

However, this technology needs to set up a special support plate inside the motor, occupying the internal space of the motor, making the internal structure of the motor more compact, resulting in a reduction in the heat dissipation capacity of the product, and at the same time, if the support plate breaks during use, the motor will not work normally and affect the product. quality

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