A brush device and a motor

Abstract

The invention belongs to the technical field of electric brushes, and specifically relates to a brush device and a motor, including a turntable. Both sides of the turntable are rotatably mounted with rectangular plates, and the rectangular plates are used for mounting and fixing the turntable. The turntable The outer ring of the outer ring is provided with a rectangular groove equidistant along its circumference, and an extrusion spring is fixed in the rectangular groove. A brush is fixed at the free end of the extrusion spring, and a pressure sensor is provided at the end of the extrusion spring far away from the brush. , the pressure sensor is used to perceive the use of the brush, wherein one of the side walls of the rectangular plate is fixed with a bracket, and the end of the bracket away from the rectangular plate is fixed with an electromagnet; the present invention is provided on the brush device Multiple brushes, and automatic replacement of brushes without manual replacement, reduces the maintenance cost of motor brush replacement, so that the motor can work for a long time, which brings great convenience to actual life and production.

Description

technical field [0001] The invention belongs to the technical field of brushes, in particular to a brush device and a motor. Background technique [0002] A motor is an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction. The motor is represented by the letter M in the circuit, and its main function is to generate driving torque. As a power source for electrical appliances or various machines, the generator is represented by the letter G in the circuit. Its main function is to use mechanical energy to convert electrical energy. [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 a carbon brush. The electrical conductivity, thermal conductivity and lubricating properties of the brush are good, and it has certain mechanical strength and the instinct of commutating sparks. It is an imp...

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Problems solved by technology

[0004] There are also some technical solutions about brush devices in the prior art, such as a Chinese patent with application number 201711009220.0, which discloses a brush device and a motor, wherein the brush device includes a brush holder, a brush cover, Brushes and elastic elements, the motor includes a casing, a commutator and a brush device. In this invention, the commutator and the brush are in a rolling fit instead of a sliding friction fit in the transmission structure, and the friction between the two is greatly reduced. , thereby reducing the wear of the brush and commutator, and also reducing the commutation spark, commutation dust, commutation vibration and commutation noise, and the brush and commutator are rolling friction, and the motor basically has no commutation To the spark, the safety of use in the dust environment is greatly improved, but the invention still only has one pair of brushes, and the brushes must be replaced when the brush fails, which increases the maintenance cost to a certain extent. Being in a position that is not convenient for disassembly brings certain obstacles to the maintenance of the motor, thus affecting the actual production and life

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