Research On Innovative Design Of Prickly Pear Picking Machine Based On TRIZ Theory

Prickly pear has the reputation of being the king of vitamin C and is rich in a variety of nutrients.In 2021,Guizhou prickly pear has a contiguous planting area of2.2 million mu,and the output of fresh fruit will reach 500,000 tons.In recent years,the prickly pear industry has provided important contributions to the rapid development of Guizhou’s agricultural economy,and has achieved remarkable results in poverty alleviation and prosperity.The development of the prickly pear industry has driven industries such as prickly pear cultivation,planting,and product deep processing.However,the prickly pear picking process is still carried out manually.Manual picking has the problems of poor working environment,great harm to people during the picking process,and low picking efficiency.The development of pear picking machine is of great significance to the modernization of prickly pear production.In the early stage of this research,the growth status and planting environment of the prickly pear were investigated in-depth on the prickly pear plantation,measured and statistically measured the size of the branch and trunk of the prickly pear.The data of the stalk detachment force.In the mid-term,based on the design theory of TRIZ and AD axioms,three types of prickly pear picking mechanisms were designed,namely,rake type,cylindrical wave type and comb vibration type.The design and evaluation of the three picking mechanisms were carried out,and the optimal design plan was calculated and the optimal plan was calculated.Mechanics simulation to verify the feasibility of the design;later,the three existing chassis are analyzed,the optimal load-bearing chassis is selected,and the existing agricultural machinery chassis is analyzed and optimized.Specifically studied the following:(1)Field investigation of the prickly pear planting base,inspection of the planting environment and growth status of prickly pear,and measurement and statistics of the height of prickly pear branches,covering width,diameter of prickly pear shrub branch group,secondary and tertiary branches Dry diameter and length.Analyzed and summarized the distribution of prickly pear fruit,determined the growth of prickly pear and the degree of suitable mechanical picking.The Guilong No.5 prickly pear was collected from the No.5 prickly pear plantation base in Longli County,Guizhou Province,and the stalk detachment force test of the prickly pear was carried out with a high-precision force gauge.Take every 10 test groups as the test group to analyze,measure the force data from 90 degrees,135 degrees,and 180 degrees of force angles,and statistically analyze the stalk detachment force under three different force angles,for picking prickly pear The machine design provides an important data basis.(2)Use the multi-screen method of TIRZ theory to perform system analysis,extract the problem-solving model from the traditional simple prickly pear picking tools,carry out derivative design of the problem-solving model,use TRIZ theory to analyze the functional components,locate harmful functions,and then pass The object field model of TRIZ theory is analyzed,a perfect rake-type picking mechanism is proposed,and the axiom design analysis and verification of the rake-type picking mechanism are carried out.Using the dwarf method of TRIZ theory to systematically analyze the rake-type picking mechanism,the insufficient functions of the rake-type picking mechanism are obtained,and the reasons that are likely to cause the sticking of the branches or the mechanical stability are located.The rake-shaped picking mechanism is designed and analyzed,using 76 standard solutions of TRIZ theory,39 engineering parameters,etc.,the wave-cylindrical picking mechanism is deduced,and the axiom design analysis and verification of the wave-cylindrical picking mechanism is carried out.Based on the analysis of the existing comb picking machine,based on the thinking of TRIZ theory,a comb vibration type prickly pear picking mechanism is proposed.The axiom design analysis and verification of the tooth-comb vibration type prickly pear picking mechanism.(3)AHP multi-level analysis of the three picking institutions from the three evaluation indicators of rationality,innovation,and economy,and organize experts to score the three programs,calculate the index scores corresponding to each program,and then calculate The degree of relevance,and finally the optimal design plan is determined through the calculation of the degree of excellence.The ADAMS mechanics simulation of the optimal design scheme verifies the feasibility of the design.(4)From the perspective of the machine and the environment,the chassis platform of the picker suitable for Guizhou prickly pear planting is analyzed,the advantages and disadvantages of the wheeled,crawler and backpack platform are summarized,and the crawler is determined as the final prickly pear picker.Platform,and finally redesign and optimize the chassis of the prickly pear picker through TRIZ theory.From the perspective of planting environment,suggestions for planting planning of prickly pear suitable for agricultural machinery operation are proposed.Based on the actual planting environment and growth conditions of prickly pear,this research takes AD axiom design top-down design thinking as design guidance,and uses TRIZ theory to innovatively design prickly pear picking mechanism,and systematically proposes prickly pear.The overall design of the picking machine provides an important reference for the research on mechanization of prickly pear picking.