四汽车列车相对运动关系的分析由牵引汽车与挂车(或半挂车)组成的汽车列车是个统一的整体,当在道路上行驶时,它的各个车节时刻都在不停的运动着和互相作用着。因此,挂车与牵引车的联接必须是活络关节,以保证牵引车与挂车之间有灵活的相对运动。否则,将造成巨大的扭转力和弯曲力,使机件破坏。 Analysis of the relative movement of four-car trains The car trains composed of towing trailers and trailers (or semitrailers) are a unified whole. Each section of the train runs constantly and interacts with each other when driving on a road With Therefore, the trailer and tractor connections must be active joints, to ensure that there is a flexible relative movement between tractor and trailer. Otherwise, it will cause tremendous twisting and bending forces, thus damaging the mechanical parts.