滚子链, 修正渐开线齿廓, 链轮, 多体动力学

Through modifying the profile of an involute sprocket, the equation of modified involute sprocket profile was derived. A multi-body dynamic model of double overhead camshaft timing chain was constructed and the dynamic simulation ranging from low speed to high speed for the timing chain system was achieved. Comparing the simulation results of using GB1244-76 sprockets，DIN8196sprockets and modified involute sprockets, the results show that using the modified involute sprocket can reduce meshing impact and friction force between chain and transmission parts, so as to reduce the noise and lengthen the life of chain and sprockets.

roller chain, modified involute profile, sprocket, multi-body dynamics