The transmission of tradition steering echelon mechanism is analyzed by the aid of the principle of Ackerman, and the existed theory error is pointed out.

• 以阿克曼原理为基础,分析传统转向梯形机构的传动,指出其原理误差存在的原因;为此建立两种带有误差补偿环节或功能的转向梯形机构,使传统转向梯形机构的原理误差得到消除,实现车辆转弯的纯滚动。