In order to analyze the transmission characteristics of non-circular gears in different transmission modes,Pascal worm line gear was taken as the research object,and the mathematical model of the Pascal worm line gear pitch curve was established in internal meshing transmission,and a visualization platform for the transmission characteristics analysis of the Pascal worm line gear in internal meshing transmission was established by using MatLab based on the established mathematical model.the motion characteristics of the Pascal worm gear during internal and external meshing transmission were analyzed by using the developed visualization platform.The amplitude of the Pascal worm gear pair transmission ratio was affected by circle diameter occurs and exhibition length by compared and analyzed,and the amplitude of the transmission ratio was not affected by the denatured coefficient,but position of the amplitude of the transmission ratio was affected by the denaturation coefficient.The range of transmission ratio variation during external meshing transmission was significantly larger than that during internal meshing transmission.In order to further explain the influence of transmission mode on motion characteristics,the guide bar mechanism was studied and analyzed as an example.If the transmission ratio changes greatly during design,the outer meshing transmission mode should be selected.If the transmission ratio change range is small and the structure is compact,choose the internal meshing transmission mode.
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