通过对日系品牌挖掘机上使用的回转立轴的测绘过程,运用机械原理知识,并根据挖掘机的作业特点,阐述了渐开线外花键和渐开线外齿轮齿形角、模数、变位系数等主要参数的测绘方法。 Through the mapping process of rotating vertical shaft used on Japanese brand excavator, using knowledge of mechanical principle and according to the operation characteristics of excavator, the tooth profile angle, modulus and displacement of involute external spline and involute external gear are expounded Coefficient and other major parameters of the mapping method.