The new cycloid cam sliding tooth transmission is a two-teeth difference sliding tooth planetary gearing with cycloid internal gear. Based on its transmission theory and structure

the profile normal line method is established to resolve the cam profile. It is shown that the profile of positive and negative cam sliding tooth gearing is unique. The meshing equation of cycloid cam sliding tooth transmission is devoped in detail. Numerical results and meshing simulation are presented and proterties of this transmission are discussed.