关键词: 电动重卡；螺旋锥齿轮；胶合；扭矩策略

Abstract: Aiming at the problem of early tooth failure of spiral bevel gears in electric heavy-duty trucks during service, this article identified the main causes of the failure through means such as macroscopic morphology analysis, material analysis, microscopic analysis, stress analysis, and message analysis. This analysis suggests that by optimizing the mutual switching between forward and reverse, and reverse towing, as well as the torque design strategy, and by optimizing the macroscopic and microscopic modification of gears and meshing marks, the safety factor of gluing can be reduced and the anti-gluing ability of gear oil can be enhanced, so as to be applicable to the dynamic load changes and acceleration/braking switching conditions of electric heavy-duty trucks. The research results provide a certain basis for improving the reliability of the transmission system of electric heavy-duty trucks.

Key words: electric heavy-duty trucks; spiral bevel gear; gluing; torque strategy