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Brush assembly

A brush and component technology, applied in the direction of electric components, electrical components, electromechanical devices, etc., can solve the problems that the contact surface between the brush and the commutator is not ideal, the motor cannot run normally, and the service life of the motor is affected. The effect of brush consumption, suppression of discharge sparks, and improvement of service life

Inactive Publication Date: 2015-07-01
常州时代精工刃具有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] Permanent magnet DC motors include brushes and commutators, but the traditional brush holders are arranged horizontally. This structure makes the effective length of the brushes limited by the internal space of the motor, and the contact surface between the brushes and the commutator is not ideal. , during the operation of the motor, the high-speed relative motion between the brush and the commutator generates friction noise and friction heat, and the commutation spark of high current accelerates the wear of the brush. Excessive wear of the brush will not only affect the performance of the motor If it cannot run normally, it will directly affect the service life of the motor

Method used

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Embodiment Construction

[0016] As shown in the figure: the present invention provides a brush assembly, including a brush holder 2, a brush holder 3, a brush 1, a constant force spring 5, and a bracket 4, and the brush holder 3 with a chute is fixed on the brush holder 2 Above, the cross-section of the brush holder 2 is conical, and the conical brush holder increases the contact area between the brush 1 and the commutator. In the limited internal space of the motor, the effective length of the brush 1 is increased, extending the To ensure the service life of the motor, the two card holders 4 are fixed on the two outer parts of the inner end of the brush holder 3, and the constant force spring 5 is a double-volume coil spring made of a spring steel strip with a thickness of 0.05 mm. There is a scroll 5a, the middle of which touches against the outer end of the brush 1 and is inserted into the notch at the inner end of the chute of the brush holder 3 together. The scrolls 5a at both ends are supported b...

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Abstract

The invention relates to the technical field of a DC motor and particularly relates to a brush assembly. The brush assembly comprises brushes, a brush rack, brush holders and constant-force springs, and the brush holders are arranged on the brush rack. The brush assembly is characterized in that the cross section of the brush rack is cone-shaped, the brushes are provided with through holes, the through holes are communication holes which penetrate using surfaces of the brushes and surfaces opposite to the using surfaces, the brush holders are provided with slide grooves, a clamping support is fixed to two outer side positions of an inner end of each brush holder, each constant-force spring is a double-scroll coil spring with two ends provided with scrolls, middle parts of the constant-force springs abut against outer ends of the brushes, the middle segment of each spring and the outer end of the corresponding brush are sleeved in the slide groove of the corresponding brush holder, and two ends of each spring are supported by the corresponding clamping support. According to the brush assembly, the service life of the brushes is effectively prolonged, and the noise of the motor is reduced.

Description

technical field [0001] The invention relates to the technical field of DC motors, in particular to a brush holder assembly. Background technique [0002] Permanent magnet DC motors include brushes and commutators, but the traditional brush holders are arranged horizontally. This structure makes the effective length of the brushes limited by the internal space of the motor, and the contact surface between the brushes and the commutator is not ideal. , during the operation of the motor, the high-speed relative motion between the brush and the commutator generates friction noise and friction heat, and the commutation spark of high current accelerates the wear of the brush. Excessive wear of the brush will not only affect the performance of the motor Failure to operate normally will also directly affect the service life of the motor. Contents of the invention [0003] In view of the above technical problems, the present invention provides a brush holder assembly, by changing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K13/00H02K5/14
Inventor 蒋建明
Owner 常州时代精工刃具有限公司
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