Optimization design of gear modification for an electric drive axle transmission system
SUN Haonan
LI Wei
GUO Niancheng
MU Qimin
GAO Yang
Abstract：In order to reduce the vibration and noise problems caused by meshing impact,load bias and transmission error of the electric drive axle of heavy-duty vehicles,a model of a two-stage gear reduction system for a certain electric drive axle is established based on the analysis software.The tooth profile modification and tooth direction modification are combined to minimize the fluctuation of transmission error and the contact stress on the tooth surface as the optimization goal,and the modification parameters such as involute slope,involute convexity,tooth direction slope,and tooth direction convexity of the first and second stage reduction active gears are determined,and the simulation analysis is carried for verification.The results show that the modification parameters of the first and second stage reduction active gears are determined by the multi-objective optimization method,with the involute slopes being 1.82 and 2.33μm,the involute convexities being 2.01 and 0.15 μm,the tooth direction slopes being 0.704 and-3.200 μm,and the tooth direction convexities being 0.185 and 0.443 μm,respectively.The simulation analysis of the modified gear shows that the maximum reduction of the peak-to-peak transmission error is 82.5％,the maximum reduction of the maximum contact stress on the tooth surface is 18.8％,and the maximum reduction of the load per unit length is 21.4％.The stress and load distribution on the modified tooth surface are more uniform,which effectively reduces the vibration and noise of the gear meshing in the transmission system.
Keywords：electric drive axletransmission errorgear modificationmulti-objective optimization
Publication Date：2025-09-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：8( 92-99 )