Design Of Rotary Fruit Tree Profiling Spray Mechanism

With the rapid development of China’s economy and society,agriculture and forestry have also developed rapidly,which has put higher demands on agricultural and forestry machinery.The prevention and control of pests and diseases in fruit trees directly affects the growth,quality,and yield of the trees.Although there have been many advances in spraying equipment and techniques for fruit trees,precise and satisfactory spraying is still not achievable.As modern orchards are moving towards modernization,standardization,and scale,this study focuses on a rotatable automatic mimetic spraying mechanism for fruit trees.The aim is to automatically adjust the corresponding size according to the spacing,height,and crown shape of fruit trees and achieve 360° circumferential spraying to further improve spraying efficiency and reduce environmental pollution,providing technical support for modernized,standardized,and scaled production in orchards.This article determines the design scheme,including the lifting mechanism,horizontal extension mechanism,rotating mechanism,and mimetic mechanism,based on the functions that the mimetic spraying machine needs to achieve.By consulting relevant parameters for standardized orchard cultivation,the size and structural form of the mimetic mechanism are preliminarily determined.Solid Works 3D modeling software is used to model the rotatable automatic mimetic spraying mechanism for fruit trees and simulate the motion characteristics of the mechanism.The design of the rotating mechanism is optimized and improved,and the final design meets the requirement of 360° circumferential rotation of the rotating mechanism.Finite element analysis software ANSYS and virtual prototype software Adams are used to conduct finite element analysis and kinematic simulation analysis on the 3D model of the rotatable automatic mimetic spraying mechanism for fruit trees established in Solid Works.The analysis evaluates whether the structures of each part meet the strength requirements,and analyzes the curve graphs of the displacement,velocity,and acceleration of the mass points of each member during the operation of the mechanism in Adams Postprocessor,as well as the force analysis diagram of each key hinge point.The simulation results show that the motion state of each spray rod meets the design requirements.The position of the micro push rod hinge point in the mimetic mechanism is optimized using Adams.Finally,the designed mechanism is scaled down proportionally,and a physical prototype is manufactured and assembled to verify the feasibility of the mechanism.The test results show that the designed rotatable automatic mimetic spraying mechanism for fruit trees can achieve the design functions and meet the expected design goals.