Design and Load Capacity Research of a Novel Roller-Plate CVT

In this study, a novel four-roller, dual-plate design was implemented to enhance the contact points in a traditional roller-plate continuously variable transmission (CVT). This design aims to achieve torque distribution and convergence, thereby improving the system’s load-bearing capacity and power transmission capabilities. The contact model for the frictional region was established using the Hertz contact formula and Brewe’s iterative algorithm data regression formula to analyze the maximum contact stress and deformation. Additionally, a simulation analysis of stress and strain on the model's contact surface is performed to validate the accuracy of the theoretical calculation results. The results indicate that the four-roller, dual-plate CVT requires an increase in the plate clamping force to enhance friction and achieve power transmission. When the input power of a medium-sized off-road vehicle reaches its maximum, the pressure experienced by the rollers still remains below the material's yield limit. This results in a significant improvement in the transmission torque and its application range.