Great speed ratio frictional transmission is a new kind transmission device

which has high precision and great speed ratio. Flexible wheel is one of the key components in great speed ratio frictional transmission. It will has micro-deformation by load. In this paper

flexible wheel is modeled with elastic mechanics theory and finite element analytic method. And its different amounts of deformation caused by different load are analyzed by ANSYS software. The device of testing flexible wheel’s amount of deformation is designed and fabricated. The angle amounts of deformation by different loads are tested with 0.2 angular second electronic leveler in micro-deformation. The disparity between theoretical amount of deformation practical amount of deformation is putted forward. At last

we considered in this paper that the theoretical amount of deformation can be used in program of the driving system to eliminate the deformation in order to improve transmission precision.