According to the requirement of extending application protocol,the geometric model description methods of the cone gear for final driver of automobile driving axle system based on STEP were presented(ZCAP203,ZCAP42).

• 根据扩展应用协议的要求 ,提出一种基于STEP标准的汽车后桥主传动器中圆锥齿轮类零件的几何模型描述 ,如ZCAP2 0 3、ZCAP42。