关键词: 行星减速器, 结构优化, 电动底盘, 轻量化, 模态分析, 车辆与动力

Abstract: In view of the low passability of the mountain modular electric chassis and the large size of the agricultural planetary reducer, a twostage planetary reducer with power output on the same side and coaxial input shaft and output flange is designed. In accordance with the reliability design theory, an optimization analysis model with the objective of gear volume and minimum is built, and the number of teeth, modulus and other parameters are obtained according to the concentric conditions, assembly conditions and other constraints, and a threedimensional model of the planetary reducer with same side output is established. The total volume of the planetary gearbox was reduced by 5.3% and the radial dimensions by 6.2% after optimization by means of reliability design theory, resulting in an average reduction of 13.9% in the lateral displacement of the tracks. The modal and static analysis of the transmission using ANSYS showed that the 1st order intrinsic frequency of the transmission was 676.94Hz which was much higher than the vibration frequency of the gearbox at 73.91Hz. The maximum stress of 240.72MPa in the output flange of the planetary gearbox is less than its yield limit and meets the strength requirements.

Key words: planetary reducer, structural optimization, electric chassis, lightweight, modal analysis, vehicle and power