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Motor shaft grounding device and motor thereof

A technology of grounding device and motor shaft, which is applied in the direction of connecting with the grounding device, can solve the problems of inconvenient replacement of carbon brushes, complex structure, interference with manufacturing costs, etc., and achieve the effects of eliminating potential safety hazards, small size, and low cost

Pending Publication Date: 2021-05-11
爱珂勒电子元器件(珠海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a motor shaft grounding device and its motor, which overcome the problems of high manufacturing cost, complex structure, and carbon brush in the prior art to solve the problem of capacitive interference current. Problems such as inconvenient replacement

Method used

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  • Motor shaft grounding device and motor thereof
  • Motor shaft grounding device and motor thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] refer to Figure 1 to Figure 2 , Embodiment 1 provides a motor shaft grounding device, which is used for the grounding discharge of the motor shaft in the motor, including a fixed frame 1, a carbon brush 2, a pretension mechanism 3 and a conductive bridge 4, and the fixed frame 1 is connected to the grounding ring of the motor. The carbon brush 2 is fixed on the fixed frame 1, the carbon brush 2 includes a contact surface 21, and the contact surface 21 abuts against the motor shaft, the pre-tension mechanism 3 is connected to the fixed frame 1, and the pre-tension mechanism 3 applies a force from the contact surface 21 to the carbon brush 2. Pointing to the pre-tightening force of the motor shaft, the conductive bridge 4 is conductively connected to the carbon brush 2 and the grounding ring of the motor, respectively.

[0026] It should be noted that the motor includes a motor shaft and a grounding ring. The motor shaft rotates, and the grounding ring is relatively stat...

Embodiment 2

[0037] Embodiment 2 provides a motor, including a motor shaft grounding device in Embodiment 1, and also includes a motor shaft and a grounding ring. The motor shaft is electrically connected to the grounding ring through the motor shaft grounding device. The grounding ring and the motor shaft grounding device are both Inside the housing of the motor.

[0038]Compared with the prior art, the present invention provides a motor shaft grounding device and its motor. The electromagnetic induction current generated by the motor shaft is guided to the grounding ring of the motor through the carbon brush 2 and the conductive bridge 4, and the carbon brush 2 passes through the pretensioning mechanism 3 The tight connection with the motor shaft is realized, and the potential safety hazard of the motor shaft being electrified is eliminated.

[0039] The fixing frame 1 is made of plastic material and integrally formed, the replacement of the carbon brush 2 is convenient, the structure is...

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Abstract

The invention provides a motor shaft grounding device. The device is used for grounding discharge of a motor shaft in a motor, and comprises a fixing frame, a carbon brush, a pre-tightening mechanism and a conductive bridge, the fixing frame is connected to the grounding ring of the motor, the carbon brush is fixed to the fixing frame and comprises a contact surface, the contact surface abuts against the motor shaft, and the pre-tightening mechanism is connected to the fixing frame. The pre-tightening mechanism applies a pre-tightening force pointing to the motor shaft from the contact surface to the carbon brush, and the conductive bridge is conductively connected to the carbon brush and the grounding ring of the motor. The invention further provides a motor comprising the motor shaft grounding device. The motor further comprises the motor shaft and the grounding ring. Electromagnetic induction current generated by the motor shaft is guided to the grounding ring of the motor through the carbon brush and the conductive bridge, the carbon brush is tightly connected with the motor shaft through the pre-tightening mechanism, the potential safety hazard that the motor shaft is electrified is eliminated, the fixing frame is made of a plastic material and is integrally formed, the carbon brush is convenient to replace, the structural stability is high, the cost is low, the size is small, the structure is simple, and the practicability is high.

Description

technical field [0001] The invention belongs to the technical field of motor running discharge, and in particular relates to a motor shaft grounding device and a motor thereof. Background technique [0002] Motors are widely used in various industries, especially in the field of electric vehicles, the safe operation of motors has attracted more and more attention. The motor often encounters the problem of capacitive interference current during operation. In the asynchronous motor directly operated by the power supply current, the voltage of the phase is kept balanced, and the sum of positive and negative tension is always zero, but the rotating shaft of the motor is due to the electromagnetic induction effect A certain current is generated, resulting in a voltage imbalance. The voltage induced by the motor windings to the rotating shaft may cause discharges on the motor bearings, resulting in spark corrosion and accelerated aging of the bearing grease to damage the running ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K11/40
CPCH02K11/40
Inventor 杨仁庚刘宏辉
Owner 爱珂勒电子元器件(珠海)有限公司
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