The main causes of gear system noise are as follows:

(1) In terms of gear design, improper selection of parameters, too small overlap, improper or no modification of the tooth profile, unreasonable gear box structure, etc. To

(2) In gear processing, the base pitch error and tooth profile error are too large, the tooth side clearance is too large, and the surface roughness is too large. To

(3) Gear train and gearbox, the assembly is eccentric, the contact accuracy is low, the parallelism of the shaft is poor, the rigidity of the shaft, bearing, support is insufficient, the rotation accuracy of the bearing is not high, and the clearance is improper. To

(4) Input torque in other aspects. The fluctuation of load torque, the torsional vibration of the shaft system, the balance of the motor and other transmission pairs, etc.