Analysis on Lift Mechanism of Vehicle-mounted Circumgyration Lift Flat

The feasible schemes of lift mechanism applied on flatcar are presented,including a four-bar linkage mechanism with a length-alterable component-ball screw shaft,and the calculating methods of structure parameters and force analysis methods of crank rocker mechanism and rotating guide bar mechanism are discussed emphatically.By comparative analysis and fulfiling the function requirement,the preferable ball screw shaft scheme is adopted and put into practice,through which the satisfactory effect has been received.