Although the vibration characteristics of high-speed helical gear transmission of an electric vehicle reducer have been studied, some conclusions with practical significance have been obtained. Based on the research work and the current research situation at home and abroad, it is believed that further research can be carried out in the following aspects:
(1) The meshing impact time is very short, and it is difficult to measure in experiment or simulate in software. The current calculation method is not accurate enough. Therefore, it is urgent to establish a high-precision meshing impact model and calculation method.
(2) In addition to the vibration and noise generated by the internal excitation of the gear box, the external excitation factors are also very important, such as the fluctuation of the input torque of the motor, the change of the wheel load torque, the mass eccentricity of the rotating parts, and the time-varying of the bearing stiffness. In the further accurate analysis, the above factors should be comprehensively considered.
(3) The specific tooth surface modification may not be widely applicable, for example, it has good vibration reduction effect on the system under specific working conditions, while its vibration reduction effect may not be significant under other working conditions. Therefore, how to take the working conditions of electric vehicles into account and obtain the optimal modified tooth surface through optimization analysis is of great significance.
(4) Experimental study on vibration characteristics of high speed helical gear transmission system.