A new method for torque balancing of planar linkages using non-circular gears

This paper proposes a novel concept for reducing driving torque fluctuations of planar linkages by the application of non-circular gears. The circular gears normally used in gear linkage mechanisms are replaced by a pair of non-circular gears. The design method includes two individual stages: linkage synthesis and gear ratio synthesis. An optimization model is developed for determining the appropriate transmission ratio function of the non-circular gear pair to meet user-specified requirements and constraints. Two examples are given to demonstrate this method and to verify its feasibility.