关键词: 重型商用车；传动轴；布置校核；十字轴；DOE；多体动力学

Abstract: Cross shaft universal joint drive is mostly used in heavy commercial vehicle, and the cross shaft arrangement angle is an important factor affecting the service life of the drive shaft assembly. Firstly, by analyzing the failure mode and stress situation of the transmission shaft, it is concluded that the excessive transmission shaft angle is one of the main reasons for its failure. Then, the optimal arrangement angle of dynamics is obtained by using multi-body model and design of experiment (DOE) analysis method. Finally, the transmission shaft arrangement hard point, connection flange offset distance and flange length are optimized. The equivalent angle of the transmission shaft is significantly reduced after optimization, which effectively improves the service life of the transmission shaft and solves the problem of transmission shaft failure.

Key words: Heavy duty commercial vehicle; Transmission shaft; Layout verification; Cross shaft; DOE; Multi-body dynamics