Optimized Design Of Greenhouse Hand-held Transplanting Machine Planting Mechanism

Greenhouse planting has good thermal insulation performance,can be efficient production,to meet people’s needs for vegetables in winter,but the current market a variety of models are used in the field of models and planting erection is not very ideal,planting institutions are a key part of the transplanting machine,so this topic will be the main optimized design for the planting mechanism of small transplanting machines used in greenhouses or small plots,the specific research content mainly includes the following points:（1）The growth characteristics of bowl seedlings are analyzed.The morphological characteristics of bowl seedlings will have an important impact on some of the structural parameters and working parameters of the planter,and through the analysis of the growth data of tomatoes and peppers of three different varieties,the 40-day bowl seedlings are most suitable for transplanting,with a score of 40 The seedling form of the day is designed for the parameters of the planter.（2）Determine the overall design of the planting establishment.With the goal of improving the planting uprightness,a set of cam balance rod type double row planting mechanism was determined,and the Pro-E software was used for three-dimensional modeling and initial parameter simulation,and the cam synchronization control mechanism is designed,and it is verified that the mechanism can well meet the timely opening and closing of the duck’s beak.（3）Multi-objective optimization design of planting institutions.Firstly,the planting mechanism is mathematically modeled,and in the optimization process of the cam part,the planting trajectory under the initial parameters is continuously adjusted to make it smooth,and then MATLAB is used to reverse the cam contour shape,and finally determines that cam 1 is the optimal cam.Through the analysis of the mathematical model and the planting trajectory to determine the design variables,constraint functions and target equations of the connecting rod part,the multi-objective optimization design model of the cam pendulum planting mechanism is mainly used to construct the multi-objective optimization design model of the cam pendulum planting mechanism by means of multi-objective solution of MATLAB optimization toolbox,and when the unit forward speed is 500mm/s and the active speed is 60rad/min,a set of optimal parameter combinations is finallyobtained through data analysis:L₁=128mm,L₂=52mm,L₃=150mm,L₄=120mm,L₅=336mm,L₆=60mm,L₇=300mm,L₈=82mm,L₉=104mm,L₁₀=48mm,R=32mm,θ₁=56°,θ₂=256°,θ₃=316°,γ=8°,（X_K,Y_K）,（X_O,Y_O）,（X_B,Y_B）the three-point coordinates are（-81.75,-6.39）,（0,0）,（139.08,35.72）.The analysis of the trajectory,velocity,acceleration and swing angle of the duckbill planting point can well meet the expected planting trajectory morphology.（4）Processing trial planting institutions,field tests.After verification,the corresponding planting effect of the three grades after optimization has been improved and improved,for example,when the current feed speed is 500mm/s and the planting frequency is 60 plants/row/min,the planting pass rate and excellent rate are increased by 3.57%and 3.63%respectively,and the plant distance variation coefficient and planting depth pass rate are also improved.