Design And Optimization For Seedling And Planting Device Of Automatic Transplanter

Automatic transplanting technique in dryland is the main research direction in the transplanting field,and can automatically solve the problem of labor shortage and inconsistent depth of planting and it also can increase productivity,save time of the transplanting.The research of picking seeding and planting equipment,can realize highly seedling transplanting process automation,improve the reliability of transplanting equipment,and increase the quality of transplant,have a great significance on the development of agricultural production which is combined with agricultural machinery and Agronomy.In this paper,the picking seeding and planting devices of the automatic transplanter were be designed and optimized,including the following aspects:(1)program team: in the research of the seeding pick-up and planting device,made a function and needed analysis of the seeding pick-up and planting device,proposed the overall scheme of seedling pick-up and planting devices,analyzed the function that have be achieved of two devices,determined the picking seeding device by using planetary gear linkage,and the planting device used Rod-duck-billed.(2)Picking seeding analysis: designed a picking seeding device with planetary gear linkage,used machinery principle to establish the diagram of the seeding pick-up device,created a kinematics model of seeding pick-up device by vector method,obtainedthe speed,acceleration,and the locus equation of the actuator of the seeding pick-up device.Used VB6.0to do the parametric design,determined the length of the planet carrier LOA=38mm,the length of the connecting rod AB LAB=38mm.(3)Planting analysis: designed linkage-duckbill planting mechanism,established the kinematic model and solved the model by vector method,got the locus equation of the actuator of the planting device,optimized the linkage dimensions by using VB6.0,achieved the parameters as the planet carrier length LOA=62mm,the length of the connecting rod AB LAB=62mm,rod length of BJ LBJ=120mm,the best length of rod JP LJP=191mm.(4)Simulation analysis: created the models of seeding pick-upand planting devices in SolidWorks2014,used the software to do the virtual assemble and interference check of the seeding pick-up and planting device,the trajectory of seeding pick-up and planting devices to meet the design requirement.Focused on that when the seeding picking device is working as60r/min,the meshing force change of the planetary-gear,theoretical values of mashing force in the x and y directions are 577.5N and 580.7N,the simulated values in the x and y directions are578.6N and 572.6N.(5)Experiment Research: when the transplanter forwards at a speed of 0.68km/h,the result shows that: frequence of seeding piking and planting is52 strains/min,the standing rate of pepper seedings is 96.3%,Plant qualification rate is 93.3%,picking seeding qualification rate is 97.6%,dropping seeding qualification rate is 96.2%.