A carbon brush for an electric motor with a replacement indication device

Abstract

The invention relates to a carbon brush for an electric motor with a replacement indication device, belonging to the technical field of electric motor equipment. The carbon brush for an electric motorwith a replacement indication device includes a carbon brush main body disposed inside a metal inner seat of the carbon brush, a carbon brush cover disposed at an upper end of the metal inner seat ofthe carbon brush, and a spring positioned between the carbon brush cover and the carbon brush main body. One end of the carbon brush main body is in contact with the commutator and the other end is in top contact with the spring, one side of the carbon brush main body and the spring top contact is provided with an indication groove filled with colored powder inside, and the indication groove opening end is sealed by a sealing plug; A carbon brush insulation outer seat is embedded in a carbon brush mounting hole of the motor housing, and a carbon brush metal inner seat and a carbon brush coverare arranged in the carbon brush insulation outer seat; At that end of the metal inn seat of the carbon brush in contact with the carbon brush cover, a spring seat for support the spring is fixed. The invention has the advantages of simple structure and convenient use, can accurately master the replacement opportunity of the carbon brush, and realizes the warning and prompting function.

Description

technical field [0001] The invention relates to a carbon brush for a motor with an indicating replacement device, belonging to the technical field of motor equipment. Background technique [0002] A carbon brush is a device that transmits energy or signals in a motor. It is generally made of pure carbon plus a coagulant. The carbon brush is an important component of the motor. The sliding contact body is widely used in various AC and DC generators. In the DC motor, the carbon brush is also responsible for commutating the alternating electromotive force. [0003] During the working process of the motor, the commutator rotates under the drive of the rotor, and the commutator and the carbon brush conduct electricity through sliding contact. After the motor has been working for a certain period of time, it is necessary to constantly observe the wear of the carbon brushes and replace them in time to avoid excessive wear of the carbon brushes. loss. However, in the existing mot...

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Problems solved by technology

[0003] During the working process of the motor, the commutator rotates under the drive of the rotor, and the commutator and the carbon brush conduct electricity through sliding contact. However, due to the continuous friction contact between the commutator and the carbon brush, the carbon brush is inevitably worn, After the motor has been working for a certain period of time, it is necessary to constantly observe the wear of the carbon brushes and replace them in time to avoid excessive wear of the carbon brushes. loss

However, in the existing motors, if one wants to observe the wear of the carbon brushes, the entire motor needs to be disassembled to take out the carbon brushes for observation, which takes time and effort, affects work efficiency, and causes inconvenience in maintenance.

[0004] In order to achieve the purpose of accurately grasping the timing of carbon brush replacement, self-stop carbon brushes are mostly used in the market, but due to reasons such as reliability and cost, users have not accepted them, and they have not been popularized on a large scale.

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