Gearbox of floating-type inner frictional wheel

The designed transmission case of floating-type inner frictional wheel is made of outer frictional wheel, inner frictional wheel and floating frictional wheel. The motion or power is inputted through outer frictional wheel and transmitted to the inner frictional wheel through the frictional of floating frictional wheel. Because of the different diameters between outer and inner wheels, the transmission case has the same functions of conventional transmission case. The outer and floating frictional wheels are assembled within inner frictional wheel, so the structure is compact. After wearing the floating wheel has the capability of self-adjusting to reach the suitable position in the wedged space. Meanwhile, the structural parameters, transmission capability, dynamic property of the transmission case are detailed.