Some users in the operation of equipment a few months after the output shaft of the drive motor is off. Why the gear unit output shaft of the driving motor wring? To this end, we view the cross-section of the output shaft of the drive motor, with almost exactly the same cross-section of the output shaft of the reducer. Cross-section of the outer ring is brighter, and more to the axis at the cross-section, the darker the color, and finally to the axis is broken at the! Figure 2 is a photo of the cross section. This fully explains the main reason for the output shaft of the drive motor is broken shaft motor and reducer assembly Heart!
Concentricity between the motor and reducer assembly to ensure a very good motor output bearings by just turning force, the operation will be very smooth. Different mind, however, the output shaft to withstand the radial force of the reducer from the input terminal, the long-term effect of the radial force will cause the motor output shaft is forced to bend, and the direction of bending is changing with the rotation of the output shaft. Per revolution of the output shaft, the transverse direction of the force is changed by 360 degrees. Concentricity error is large, the radial force to make the temperature of the motor output shaft increases, the metal structure is constantly being destroyed, and finally, the radial force will exceed the motor output shaft can withstand the radial force, and finally lead to drive The motor output shaft is broken. The shorter the time, the drive motor output shaft broken when the greater the concentricity error. Broken while in the output shaft of the drive motor, the gear unit input terminal will also withstand the radial force from the motor, if the radial force at the same time exceeds the maximum radial load can withstand both, then its result will resulting in the reducer input of deformation or fracture. Therefore, in the assembly to ensure concentricity is critical!
Intuitively, if the concentric to the motor shaft and gear unit input terminal, then the fit between the motor and reducer will be very close, the contact surface between them is closely connected, and the assembly when the heart, then the contact surface between them between there will be a gap.
Similarly, the output shaft of the gear unit there occurs the phenomenon of broken or bent, the same reason of its causes and the broken shaft of the drive motor. But the the deceleration machine's output is driven motor output and deceleration than the plot, in terms relative to the motor output greater, so the gearhead output shaft is more easily broken. Therefore, reducer, its guarantee of the output assembly concentricity should also pay great attention to!
Two reducer output the broken shaft problem too small
In addition to the output end of the reducer assembly concentricity bad, caused reducer broken shaft, the output shaft of the reducer broken, nothing more than for the following reasons.
First, the wrong selection led with reducer output is not enough. Some users in the selection, mistakenly believe that as long as the selected reducer Rated output torque to meet the work requirements, it is not true, one with the rated motor output torque multiplied by the reduction ratio less than, the values obtained in principle rated output torque of the product samples of similar reducer while also considering the overload capacity of the drive motor and the actual maximum operating torque required. In theory, the user maximum operating torque required must be less than 2 times the rated output torque of the reducer. Especially some applications must strictly abide by the guidelines, it is not only the protection of the gear reducer inside, but the main thing is to avoid reducer output shaft is broken, This is mainly because, If the equipment is installed, reducer output shaft and its load is stuck, then the overload capacity of the drive motor still will it continue to increase output, in turn, may make the gearhead output bearings subject a force of more than 2 times its rated output torque and twist the reducer output shaft.
Secondly, in the process of acceleration and deceleration, the gear output shaft multiplied by the instantaneous torque if it exceeds 2 times its rated output torque, and this acceleration and deceleration is too frequent, then eventually also cause the off-axis gear unit . Taking into account this happens less, so no further description here |
