In order to qualitatively study the influence of meshing impact time on the vibration characteristics of helical gear transmission, the meshing impact time (5.6% Tz) of the input stage tooth pair of the electric vehicle reducer in this paper is widened to both sides (4% Tz, 8% Tz), three different impact times are input into the dynamic system and solved to obtain the system response, and the system vibration speed diagram under separate excitation and comprehensive excitation of meshing impact is made, as shown in Figure 1 and Figure 2.
It can be seen from Figure 1 and Figure 2 that the meshing impact time of helical gear pair is different, and the resonance speed of the system does not change significantly, and the meshing impact time has a significant impact on the vibration response of the system. The longer the meshing impact time, the greater the vibration response of the system. Therefore, in the actual design of high-speed helical gear transmission, the meshing impact time of the gear should be reduced as much as possible, that is, the comprehensive bearing deformation of the gear should be reduced as much as possible δ 。
