Figure a) shows the influence of load torque T2 on the rattling state of gears. It can be seen from the figure that the RSV value is 2 when increasing from no-load to 12n · m, that is to say, during the meshing process of the reducer variable speed integrated gear, the teeth of the two gears continuously contact at the driving side and the non driving side, i.e. they are in the bilateral impact state. However, when the load torque T2 increases to 14N · m, the value of RSV changes to 1, that is to say, the unilateral impact state appears until T2 = 20n · M. As the load torque T2 continues to increase, the speed reduction integrated gear will always maintain a non impact state. It can be seen that, with the increase of load, the reducer variable speed integrated gear will go through bilateral impact state, unilateral impact state and non impact state in turn. Under no-load or light load conditions, the impact of time-varying transient center excitation on the reducer variable speed integrated gear is more prone to beat than the ordinary circular face gear.
Figure b) is the curve of response peak to peak PPV versus load torque. As shown in the figure, in the bilateral impact state, the response peak to peak value PPV gradually increases with the increase of load torque T2, while when the unilateral impact begins to appear, the PPV value suddenly decreases, and then, with the increase of load torque T2, the response peak to peak value PPV increases at a low speed. The results show that the vibration amplitude of the gear is large under the condition of bilateral impact, and the vibration amplitude of the reducer variable speed integrated gear will jump with the appearance of unilateral impact, and the vibration amplitude of the gear will slowly increase with the increase of torque under the unilateral impact state and non impact state.