Preparation method of electric brush for vacuum cleaner motor and electric brush prepared by the method

Abstract

The invention discloses a vacuum cleaner high-speed high-efficiency motor brush preparation method and a brush prepared by the method. Constituent materials of the motor brush belong to the field of material science. The brush preparation method comprises, to begin with, mixing graphite, petroleum coke, additive, binders and curing agents uniformly under an ambient temperature condition, smashing the mixture and then, placing the smashed mixture into a die; carrying out compression moulding; and then, carrying out curing processing, cutting, grinding machine, hole drilling and line filling. The vacuum cleaner high-speed high-efficiency motor brush prepared by the method is low in resistance in the using process, good in commutating performance and long in service life, and more importantly, has high wear resistance, low spark grade and good product stability.

Description

technical field [0001] The invention relates to a brush for a motor, in particular to a brush for a vacuum cleaner motor and a preparation method thereof, belonging to the field of motors. Background technique [0002] A motor brush is a device that transmits energy or signals between the fixed part and the rotating part of a rotating machine such as a motor or generator. Also known as carbon brush. Carbon brushes are generally made of pure carbon and coagulant. They are generally square in shape and are stuck on a metal bracket. There are springs inside to press it tightly on the rotating shaft. part. The carbon brush looks a bit like the rubber strip of a pencil, with wires leading out from the top. There are large and small volumes. Carbon brushes are used on commutators or slip rings as sliding contacts for leading and exporting current, and are widely used in many electrical equipment. It has good electrical conductivity, thermal conductivity and lubricating proper...

AI Technical Summary

Problems solved by technology

However, general brushes have poor service performance, poor stability, poor resistance stability coefficient, and low specific gravity. The existing brushes for vacuum cleaner motors generally have poor wear resistance, poor spark suppression ability, and poor efficiency stability. The wear of the brush increases the contact instability, the commutation performance is poor, and mechanical sparks are prone to occur

Especially poor wear resistance, poor commutation performance, poor anti-interference ability, often unable to meet the various requirements of the motor for the brush

[0008] However, domestic brushes for high-speed and high-efficiency motors of vacuum cleaners basically rely on imported brushes (such as Shunke and Toyo brushes). Domestic brushes are not stable and cannot meet customer requirements. The patent of the present invention is mainly aimed at replacing imported brushes. The scheme uses imported materials and advanced technology to improve reversing performance, suppress sparks, and improve efficiency so that it can reach and approach the performance of imported materials!

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