Electric brush for electric tool motor and preparation method thereof

A technology of electric tools and electric brushes, which is used in the manufacture of brushes, circuits, current collectors, etc., can solve the problems of poor use performance of electric brushes, poor anti-interference ability, poor commutation performance, etc., and achieve good commutation performance and easy operation. , the effect of long service life

Active Publication Date: 2013-08-21
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 performance and poor stability, especially poor wear resistance, poor commutation performance, and poor anti-interference ability, and often cannot meet the various requirements of electric tool motors for brushes.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Prepare materials according to the following ratio:

[0031]

[0032] 2. Raw material pretreatment

[0033] Add 0.625kg of acetone to all the above epoxy resins and stir to dissolve the epoxy resin in the acetone to prepare epoxy resin glue;

[0034] 3. Mixed treatment

[0035] Towards 15m 3 Add all of the above-mentioned flake graphite, epoxy resin glue, carbon black, aluminum phosphate, tungsten disulfide and aluminum oxide to the kneading pot in sequence, and stir and mix for 60 minutes at room temperature to prepare a premix;

[0036] Turn on the heating device of the kneading pot to mix and heat the premix at the same time. When the temperature of the premix reaches 120℃, add the remaining acetone to the mixture, mix and continue heating to make the temperature of the premix Reach and keep at 130℃ and continue mixing treatment for 3h, stop heating, when the mixture is freely cooled to a temperature ≤100℃, discharge it from the kneading pot, and then freely cool to room t...

Embodiment 2

[0043] 1. Prepare materials according to the following ratio:

[0044]

[0045] 2. Raw material pretreatment

[0046] Add 0.6kg of acetone to all the above epoxy resins, stir, dissolve the epoxy resin in the acetone, and prepare an epoxy resin glue;

[0047] 3. Mixed treatment

[0048] Towards 15m 3 Add all of the above-mentioned flake graphite, epoxy resin glue, carbon black, aluminum phosphate, tungsten disulfide and aluminum oxide to the kneading pot, and stir and mix at room temperature for 80 minutes to prepare a premix;

[0049] Turn on the heating device of the kneading pot to mix and heat the premix at the same time. When the temperature of the premix reaches 130°C, add the remaining acetone to the mixture, mix and continue heating to make the temperature of the premix Reach and keep it at 140℃ and continue mixing for 3h, stop heating, when the mixture is freely cooled to a temperature of ≤100℃, discharge it from the kneading pot, and then freely cool to room temperature to obt...

Embodiment 3

[0056] 1. Prepare materials according to the following ratio:

[0057]

[0058] 2. Raw material pretreatment

[0059] Add 0.375kg of industrial alcohol to all the above epoxy resins and stir to dissolve the epoxy resin in the industrial alcohol to prepare epoxy resin glue;

[0060] 3. Mixed treatment

[0061] Towards 15m 3 Add all the above-mentioned flake graphite, epoxy resin glue, carbon black, aluminum phosphate, molybdenum disulfide and aluminum oxide to the kneading pot, and stir and mix at room temperature for 80 minutes to prepare a premix;

[0062] Turn on the heating device of the kneading pot to mix and heat the premix at the same time. When the temperature of the premix reaches 110℃, add the remaining industrial alcohol to the mixture, mix and continue heating to make the premix The temperature is reached and kept at 120℃ for continuous mixing treatment for 2h, stop heating, when the mixture is freely cooled to a temperature of ≤100℃, discharge it from the kneading pot, and...

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PUM

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Abstract

The invention discloses an electric brush for an electric tool motor and a preparation method thereof. Electric brush mixture is roasted and then compressed to form the electric brush. The electric brush mixture comprises, part by weight, 30-60 parts of natural graphite, 25-40 parts of binder, 10-15 parts of amorphous carbon, 10-25 parts of solvent and 4-8 parts of additive. According to the electric brush for the electric tool motor and the preparation method thereof, preparation technologies are simple, operation is easy, the electric brush is low in resistivity, good in abrasion resistance, good in reversing performance, strong in anti-interference capability and long in service life, various requirements of the electric tool motor for the electric brush can be met better, and application ranges are wide.

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. Background technique [0002] Electric tools are a kind of mechanized tool that uses a motor or electromagnet as the power and drives the working head through a transmission mechanism. It is mainly divided into metal cutting power tools, grinding power tools, assembly power tools and railway power tools. Common electric tools include electric drill, electric grinder, electric wrench, electric screwdriver, electric hammer, impact drill, concrete vibrator, electric planer, etc. [0003] In the prior art, carbon and graphite powder are generally used as the base material, and resin is used as the bonding material to manufacture electric brushes through kneading, grinding, molding and curing. For example, the Chinese Invention Patent Publication with the authorized announcement number CN 100438229C An electric brush for a motor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R39/20H01R43/12
Inventor 朱约辉
Owner SUZHOU DONEKA NEW MATERIALS CORP LTD
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