Some users have broken the output shaft of the drive motor after the equipment has been running for several months.The cross-section of the output shaft of the drive motor was examined and found to be consistent withreducerThe cross section of the output shaft is almost identical.The outer ring of the cross-section is brighter, and the color of the cross-section becomes darker toward the axis, and finally it is broken at the axis.This fully shows that the main reason for the broken shaft of the output shaft of the drive motor is that the motor and the reducer are not concentric during assembly.
When the concentricity is guaranteed to be very good when the motor and the reducer are assembled, the output bearing of the motor is only subjected to rotational force, and it will run smoothly.However, when it is not concentric, the output shaft has to bear the radial force from the input end of the reducer. The long-term action of this radial force will force the output shaft of the motor to bend, and the direction of bending changes continuously with the rotation of the output shaft.Every time the output shaft rotates one revolution, the direction of the lateral force changes 360 degrees.If the concentricity error is large, the radial force will increase the temperature of the motor output shaft, and its metal structure will be continuously damaged. Finally, the radial force will exceed the radial force that the motor output shaft can bear, and finally cause the drive The motor output shaft is broken.When the error of the concentricity is larger, the time for the output shaft of the drive motor to break is shorter.When the output shaft of the driving motor is broken, the input end of the reducer will also bear the radial force from the motor. If the radial force exceeds the maximum radial load that both of them can bear, the result will be The input end of the reducer is deformed or even broken.Therefore, it is very important to ensure concentricity during assembly.
Intuitively speaking, if the motor shaft and the input end of the reducer are concentric, the fit between the motor and the reducer will be very tight, and the contact surfaces between them will be tightly connected. If they are not concentric during assembly, then the contact surfaces between them will There will be gaps in between.
Similarly, the output shaft of the reducer is also broken or bent, and the reason is the same as that of the drive motor.However, the output of the reducer is the product of the output of the driving motor and the reduction ratio, which is greater than that of the motor, so the output shaft of the reducer is more likely to be broken.Therefore, when using the reducer, the user should also pay great attention to the guarantee of the concentricity of the output end assembly.
