对于用偏转导向轮实现转向的拖拉机,理论无侧滑方程是合理设计转向梯形机构的理论基础和应遵循的准则。如果对该方程应用不当,将会影响转向机构参数选择的合理性,使我们失去正确的判断。本文着重对理论无側滑方程中“M”、“L”参数的取值定义进行分析,提出新的取值定义。 For the tractor with deflection guide wheels to achieve steering, the theory of no-slip equation is the theoretical basis and the guidelines to be followed in the design of the steering trapezoidal mechanism. If the equation is not properly applied, it will affect the rationality of steering mechanism parameter selection, so that we lose the correct judgment. This paper focuses on the analysis of the definition of “M” and “L” parameters in the theory of no-slip equation and puts forward a new definition of value.