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Carbon brush assembly

A carbon brush and component technology, applied in electrical components, current collectors, rotary current collectors, etc., can solve the problems of high cost, shortened service life of carbon brushes, unstable fuse pre-embedding process, etc., and achieves convenient structure and flexibility. Unleash smooth effects

Pending Publication Date: 2022-07-15
ZHEJIANG CROWN POWER TOOLS MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this solution also has some problems: for example, the insurance sub-plan is unstable, which leads to the failure of the insurance sub-pop-up (which also leads to large sparks and damage to the commutator), see Chinese utility model patent CN208589622U; The effective wear length of the brush is much shorter, and the service life of a pair of carbon brushes is correspondingly shortened; in addition, the insurance sub-process is complicated and the cost is high

Method used

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Embodiment Construction

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] It can be understood by those skilled in the art that the features in the following embodiments and implementations can be combined with each other without conflict.

[0033] The terminology used in the present invention is for the purpose of describing part...

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Abstract

A carbon brush assembly provided by the present invention comprises a carbon brush body, a brush holder and a self-breaking unit, the carbon brush body is installed on one side of a commutator through the brush holder and keeps in contact with the commutator, and when the carbon brush body is worn due to rotation of the commutator, the length of the carbon brush body is gradually reduced until a predetermined length is reached. At the moment, the brush braid is separated from the stator due to the self-disconnection unit, so that the stator and the commutator are disconnected, and the risk that the surface of the commutator is damaged due to pulling arc generated by poor contact of the carbon brush body and the commutator is avoided.

Description

technical field [0001] The invention relates to the field of motor machinery, in particular to a carbon brush assembly. Background technique [0002] At present, there are two types of carbon brushes used in brushed motors in power tools: self-opening and non-self-opening. [0003] When considering the cost, the tools usually use non-self-opening carbon brushes. Generally, workers are unlikely to frequently check the remaining length of the carbon brushes under the condition of continuous operation, and it is difficult to judge the exact time to replace the carbon brushes. If the carbon brush is not replaced in time, the contact state of the carbon brush with the commutator will deteriorate due to insufficient brush spring force, and a large number of sparks will be generated between the carbon brush commutator, which will easily damage the commutator and affect the service life of the tool. New patent CN207602954U. [0004] Some brushed motors with high configuration use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R39/59H01R39/415H01R39/36H01R39/26
CPCH01R39/59H01R39/415H01R39/36H01R39/26H01R2201/10
Inventor 马越郑亚达
Owner ZHEJIANG CROWN POWER TOOLS MFG
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