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Electric brush for motor of electric tool and preparation method for electric brush

A technology for electric tools and electric brushes, which is applied in the manufacture of brushes, circuits, and current collectors. It can solve problems such as mechanical sparks, poor performance of brushes, and increased wear of brushes, and achieve excellent machining performance and anti-interference. Strong, spark suppression effect

Active Publication Date: 2015-05-27
SUZHOU DONEKA NEW MATERIALS CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, general brushes have poor service performance and poor stability. The unit pressure of the brush is too high, which means that the wear of the brush is aggravated. The unit pressure is too small, the contact is unstable, and mechanical sparks are prone to occur.
In particular, poor wear resistance, poor commutation performance, and poor anti-interference ability often fail to meet the various requirements of electric tool motors for brushes

Method used

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  • Electric brush for motor of electric tool and preparation method for electric brush
  • Electric brush for motor of electric tool and preparation method for electric brush
  • Electric brush for motor of electric tool and preparation method for electric brush

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1. Prepare materials according to the following weight ratio (kg):

[0053]

[0054] Among them, graphite includes natural graphite and artificial graphite, and the weight ratio of natural graphite to artificial graphite is 50:25; the lubricant includes tungsten disulfide and aluminum phosphate, and the weight ratio of tungsten disulfide to aluminum phosphate is 0.2:0.4;

[0055] 2) Put raw graphite, lubricant, zinc stearate, aluminum oxide, and paraffin in the kneading pot, turn on the heating device of the kneading pot, heat up to 160°C, and mix for 40 minutes at a temperature of 160°C. Add all the asphalt, continue to mix evenly, stop heating after mixing for 1 hour, and wait until the material is cooled to ≤40°C to prepare a premix;

[0056] 3) Put the premix in a pulverizer (Shanghai Zhuoya Mining Machinery Co., Ltd.) for pulverization. After 3 hours of pulverization, pass the pulverized material through a 80-mesh sieve to obtain premix powder. The particle size...

Embodiment 2

[0062] 1. Prepare materials according to the following weight ratio (kg):

[0063]

[0064]

[0065] Among them, graphite includes natural graphite and artificial graphite, and the weight ratio of natural graphite to artificial graphite is 20:40; the lubricant includes tungsten disulfide and aluminum phosphate, and the weight ratio of tungsten disulfide to aluminum phosphate is 0.2:0.2;

[0066] 2) Put raw graphite, lubricant, zinc stearate, aluminum oxide, and paraffin in the kneading pot, turn on the heating device of the kneading pot, heat up to 150°C, and mix for 60 minutes at a temperature of 150°C. Add all the asphalt, continue to mix evenly, stop heating after mixing for 1 hour, and wait until the material is cooled to ≤40°C to prepare a premix;

[0067] 3) Put the premix in a pulverizer for pulverization. After pulverization for 3 hours, pass the pulverized material through an 80-mesh sieve to obtain a premix powder. The particle size of the premix powder is ≤80 ...

Embodiment 3

[0073] 1. Prepare materials according to the following weight ratio (kg):

[0074]

[0075] Among them, graphite includes natural graphite and artificial graphite, and the weight ratio of natural graphite and artificial graphite is 20:50; the lubricant includes tungsten disulfide and aluminum phosphate, and the weight ratio of tungsten disulfide and aluminum phosphate is 0.2:0.4;

[0076] 2) Put the raw materials graphite, lubricant, zinc stearate, aluminum oxide, and paraffin in the kneading pot, turn on the heating device of the kneading pot, heat up to 170°C, and mix for 40 minutes at a temperature of 170°C. Add all the asphalt, continue to mix evenly, stop heating after mixing for 1.5 hours, and wait until the material is cooled to ≤40°C to prepare a premix;

[0077] 3) Put the premix in a pulverizer for pulverization. After pulverization for 3 hours, pass the pulverized material through an 80-mesh sieve to obtain a premix powder. The particle size of the premix powder ...

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Abstract

The invention discloses an electric brush for a motor of an electric tool and a preparation method for the electric brush. Constituent materials of the electric brush for the motor belong to the field of material science and the electric brush is prepared from the following raw materials in parts by weight: 30-90 parts of graphite, 10-35 parts of asphalt, 0.2-1.0 part of a lubricating agent, 0.5-5 parts of zinc stearate, 0.5-3 parts of aluminum oxide and 0.5-5 parts of paraffin. The electric brush disclosed by the invention is low in resistivity, excellent in abrasion resistance, high in commutation performance, high in interference resistance and long in service life and is importantly high in abrasion resistance and high-voltage resistance and low in spark grade.

Description

technical field [0001] The invention relates to a brush for a motor, in particular to a brush for a motor of an electric tool and a preparation method thereof, belonging to the field of motors. Background technique [0002] Power tools are powered by motors or electromagnets and drive the working head through a transmission mechanism. They are mainly divided into metal cutting power tools, grinding power tools, assembly power tools and railway power tools. Common electric tools include electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, electric planers, etc. [0003] 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 plus coagulant, and are generally square in shape, stuck on a metal bracket, and have a spring insid...

Claims

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Application Information

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IPC IPC(8): H01R39/22H01R39/24H01R43/12
CPCH01R39/22H01R39/24H01R43/12
Inventor 朱约辉吴爱民林勇
Owner SUZHOU DONEKA NEW MATERIALS CORP LTD
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