Track design and application of spatial controlled variable link-length mechanism in agriculture machine

According to a spatial practical given track, a spatial link mechanism was designed, of which a given point moving track of a link resembles the given track. In this paper, a new design method of spatial link mechanism was presented, and a controlled spatial link mechanism was chosen. The given track can be applied to many agricultural fields such as rice transplanting, fruit picking. The method can be applied to marking out track of robot and manipulator, and supply theory basis for design of implementing intricate moving tracks.