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Carbon brush

A carbon brush and carbon block technology, applied in current collectors, electrical components, electromechanical devices, etc., can solve the problems of louder sliding sound and increase in brush temperature, and achieve the effect of suppressing the increase of sliding sound and temperature.

Active Publication Date: 2015-01-21
TOTANKAKO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Here, the above-mentioned motor has the following problem: when the motor is driven, sliding occurs between the brush and the commutator, and therefore, the sliding sound becomes louder
In addition, due to the spark discharge of the carbon brush, etc., the commutator film is excessively formed, and there is also a problem that the temperature of the brush (motor) rises during energization.

Method used

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Embodiment

[0042] Hereinafter, the present invention will be specifically described based on examples, but the carbon brush of the present invention is not limited by the contents of the following examples.

[0043] [Example]

[0044] The carbon brush of the present invention is produced as follows.

[0045] First, pitch was added as a binder in a ratio of 50% by weight to the total amount of graphite powder. Next, kneading was carried out at a high temperature higher than the melting point of the pitch, and then cooled and pulverized to obtain a molding material which passed through a 40-mesh sieve. Next, the molding raw material is press-molded using a pressing device, and fired at a high temperature in a non-oxidizing atmosphere to carbonize the binder to obtain a carbon block base material. Subsequently, the carbon block base material is cut to a specified size, and then lead wires are mounted on the carbon block base material.

[0046] Then, the suspension was impregnated into po...

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Abstract

The objective of the present invention is to provide a carbon brush capable of suppressing an increase in temperature and sliding noise caused by excessive generation of coating on a commutator. The present invention is a carbon brush provided with a carbon-block base material having air holes in the surface and interior, the brush sliding in contact with a commutator provided in a motor, wherein the brush is characterized in that a suspension comprising a petroleum solvent with a boiling point higher than the temperature of the carbon brush when the motor is operating, and a fat, are present inside the holes, the ratio of the suspension to the carbon-block base material preferably being 0.5-6 percent by weight.

Description

technical field [0001] The present invention relates to carbon brushes used in commutator motors for washing machines, electric tool motors, and the like. Background technique [0002] For a long time, commutator motors have been mostly used in electric tools and washing machines. This electric motor has a structure in which a plurality of divided commutator contacts and brushes slide, whereby current from a power source is supplied to an armature wound with a coil, and the armature rotates. [0003] Here, the motor described above has a problem in that when the motor is driven, sliding occurs between the brush and the commutator, and thus the sliding sound becomes louder. In addition, due to the spark discharge of the carbon brushes, etc., the commutator film is excessively formed, and there is also a problem that the temperature of the brushes (motor) rises during energization. [0004] So far, for the purpose of suppressing the spark of carbon brushes, the following bru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K13/00H01R39/20H01R39/26
CPCH01R39/22H01R39/26
Inventor 诧间政幸
Owner TOTANKAKO
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