Influence of Rocker Pin Elastic Deformation on the Dynamic Characteristics of Chain CVT

The metal chain continuously variable transmission (CVT) is an ideal vehicle transmission device that transmits power through the friction between the chain rocker pin and the surface of the cone disc. The rocker pin is the core component that affects the power transmission of the chain CVT. Based on the dynamic simulation method of static mechanics and rigid-flex coupling, considering the influence of rocker pin elastic deformation, a rocker pin static model and a rigid-flex coupling dynamic model of chain CVT chain are constructed, and the deformation law of rocker pin under different axial clamping forces and the influence of rocker pin elastic deformation on the dynamic characteristics of chain CVT are analyzed. The results show that the axial deformation of the rocker pin will cause the change of the motion trajectory of the contact point between the rocker pin and the pulley, resulting in the increase of the vibration amplitude of the chain, and the deformation variable increases with the increase of the axial clamping force, but it is not proportional to the axial clamping force. These can provide a theoretical basis for the dynamic stability design of chain CVT.