Chapter 17 Universal Gearing 同©大学 TONGII UNIVERSTTY Section 2 Universal joints The classification of universal joints >Transmission parts are elastic,so the According to the According to whether the elastic deformation is kinematic elastic deformation of used to eliminate the characteristics transmission parts with adverse effects of >Nonconstant torque is apparent or not relative movement velocity universal between components >flexible universal joints joints and have the function of buffering and >Near constant velocity universal >rigid universal joints damping joints >Used when the changes in the angle >Constant >Transmission parts are and length of a drive velocity universal rigid and the power is shaft are slight joints transmitted by rigid hingeChapter 17 Universal Gearing The classification of universal joints According to whether the elastic deformation of transmission parts with torque is apparent or not flexible universal joints rigid universal joints Transmission parts are elastic, so the elastic deformation is used to eliminate the adverse effects of relative movement between components and have the function of buffering and damping Used when the changes in the angle and length of a drive shaft are slight Transmission parts are rigid and the power is transmitted by rigid hinge Section 2 Universal joints According to the kinematic characteristics Nonconstant velocity universal joints Near constant velocity universal joints Constant velocity universal joints