As many combined mechanisms for trajectory realizing have some limitations
a new type of combined mechanism composed by planetary gear train
cam mechanism and differential gear train is designed.The combined mechanism can move reciprocate in a straight line while sway to avoid other materials
which can be applied to continuous automatic feeding in high-speed situation.The principle and design ideas of the combined mechanism are described in details
and the key parameters are determined.Finally
the trajectory of the implementation is verified through a design example.