Optimization design and experiment of seedling conveying device of automatic transplanter
[Objective]This study aims to solve the problems of immature conveying technology of hard seedling in automatic transplanter,and low accuracy and efficiency of sending seedlings.[Method]On the basis of automatic transplanter taking and casting device of gantry frame,and automatic seedling con-veying device was designed for pot seedling conveying.The longitudinal conveying mechanism,as the key component of the device,adopted the offset crank slider structure.The cylinder travel and ratchet teeth of the conveying mechanism were taken as the design variables.The degree of freedom,theoreti-cal angular displacement and theoretical cylinder travel of the longitudinal conveying mechanism were determined by theoretical analysis.SolidWorks software was used to establish the 3D model of key com-ponents,and Adams software was used to analyze and optimize the dynamic simulation of key compo-nents.The optimized seedling delivery device prototype was tested and verified.[Results]After optimi-zation,the cylinder stroke of the longitudinal conveying mechanism was 73.80 mm,the angular displace-ment was 48°,and the number of ratchet teeth was 60.The optimized simulation results show that the cylinder drove the ratchet through 8 teeth in a single transmission,the ratchet rotation angle was 48°,and the error was controlled within the allowable range in continuous transmission.The average accu-racy of seedling delivery was more than 98.90%,the maximum error of single seedling delivery was-0.91 mm,and the maximum cumulative error of single plate was-2.48 mm.[Conclusion]The opti-mized seedling feeding device can complete the task of automatic pot seedling sending on the hard seed-ling tray,the error control is within the allowable range,and the seedlings can be accurately sent,which can meet the needs of agricultural production.
万方数据
维普
