Simulation and Test Study of the Three-Direction Stiffness and Grounding Characteristics of the Metal Spring Tire

A new kind of metal spring tire is put forward and the variation range of the vertical displacement for inner and outer springs are solved by establishing the mechanical models. The inner spring is the main load-bearing part of the tire in the vertical direction. So the inner spring’ vertical stiffness is simulated and its theoretical model is validated. In order to get the exact solution of the stiffness values of the spring tire, a stiffness test system is built. Finally, the three-direction stiffness values and grounding characteristics of the tire are obtained, and the corresponding theory and simulation model are further validated.