| The rice pot seedling and wide-narrow distance transplantation has the advantages of ricepot seedling transplantation and wide-narrow distance transplantation.The seedlings do notrequire a recovery period after pot seedling transplantation because the seedling root is notdamaged, as it is after seedling transplantation.The growing period of seedling can be reducedabout half mouth because of tillering early,and this method of transplanting could increaseventilation, lighting,so as to prevent the disease,lodging,increase production,assure the ricequality.So the rice pot seedling and wide-narrow distance transplantation is welcomed by themajority of farmers.However,due to the traditional rice pot seedling transplanting machine andrice wide-narrow distance transplanting machine are unable to meet the requirements of thistransplantation,the basic way to realize the related transplanting depends on artificial.Theartificial transplanting has the following characteristics: labor-intensive, low working efficiency,and high production costs.It is difficult to achieve large area of rice transplanting, whichrestricts the development of high yield, high quality rice production.In this paper,under the National Natural Science Foundation of China (Research on DesignMethod and Mechanism of Special “8†Shape Trajectory and Attitude of Potted-seedlingWide-narrow row) support,in view of the traditional pot seedling transplanting mechanism,which can not realize the rice pot seedling and wide-narrow distance transplanting due to trackand structure limitation,successfully institutional innovation design.The main research contentsand results are as follows:1） The noncircular bevel gear pairs transmission can realize space transmission andarbitrary transmission ratio,through the institutional innovation,This paper invented potseedling and wide-narrow distance transplanting mechanism by using planetary gear train withseven noncircular bevel gears.2）This paper established kinematics model of pot seedling and wide-narrow distancetransplanting mechanism by using D-H matrix transformation theory.Designed visualoptimization software of transplanting mechanism and had got the software registrationright.Used the optimization software for transplanting mechanism size optimization,finally getthe trajectory and attitude of transplanting which meet the requirement of rice pot seedling and wide-narrow distance transplantation.3）This paper completed the structure design of components,made use of UG software for3d modeling and virtual assembly of transplanting mechanism,finished virtual prototypesimulation test of transplanting mechanism in ADAMS software.The simulation results arecompared with theoretical data analysis, which examined the rationality of the structural design.4） Completed the two-dimensional graph and part machining of pot seedling andwide-narrow distance transplanting mechanism.And assembled parts into a physicalprototype,recorded the working of the physical prototype by using high-speed photographyinstrument,using high-speed photography analysis software to analyze the trajectory andattitude of transplanting mechanism.5）In our group independently developed mechanical transplanting test bench, completedthe fetching seedling test. |
