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What is the cause of the broken shaft phenomenon of miniature DC motors?

2019-12-17 10:14:00


Recently, many customers contacted us and asked us about the problems they encountered during the use of micro DC motors. I hope we can help. Today, I will share with you the knowledge about micro DC motor shaft breaking in these issues. Discuss it, hoping to bring inspiration and help to our customers and friends, and let everyone have a deep understanding of miniature DC motors. In this way, everyone can know what to do in the future in the process of use, not to worry, to play the maximum role of the miniature DC motor.

传具有动效率高,精度高的优势,这是其受到企业青睐的原因,但是在长期使用中,断轴现象经常发生,这种现象引其了我们的关注,出现这种情况的原因是什么? Our miniature DC motors have the advantages of high dynamic efficiency and high accuracy. This is the reason why they are favored by enterprises. However, in the long-term use, shaft breakage often occurs. This phenomenon has attracted our attention. What is the cause of the situation?
When the micro DC motor has a very good concentricity during assembly, the DC geared motor's output bearing receives only rotational force, and it will be easy to operate. However, when the DC reduction motor and the reducer are connected differently, the output shaft must bear the radial force from the input end of the reducer. This radial force will force the output shaft of the motor to bend, and the direction of the DC reduction motor shaft bending Constantly changes as the output shaft rotates. Each time the output shaft of the DC geared motor rotates, the direction of the lateral force changes 360 degrees. If the concentricity error is large, the radial force will increase the temperature of the output shaft of the motor, and its metal structure will be continuously destroyed. In the end, the radial force will exceed the radial force that the DC geared motor output shaft can withstand. As a result, the output shaft of the DC geared motor is broken.
The larger the error of the concentricity of the miniature DC motor, the shorter the break time of the output shaft of the drive motor. Therefore, at the same time as the output shaft of the drive motor is broken, the input of the DC geared motor will also bear the radial force from the motor. It is important to ensure concentricity during assembly.

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