Design And Experiment Of Self Propelled Leaf Vegetable Harvester

The research on vegetable mechanization production in China started relatively late,and after vigorous development and promotion this year,its scale continues to expand.In the leaf vegetable mechanization industry,harvesting is a process that takes a lot of time and manpower.There are many kinds of vegetables in China,mainly including leafy vegetables,root vegetables,fruit vegetables,etc.The research on harvesting machinery for root vegetables and fruit vegetables has matured,but the research on small-scale leafy vegetables harvesting machines is still very small,mainly relying on manual harvesting.With the intensification of aging and the advancement of urbanization,agricultural labor is decreasing,production efficiency is low,and costs are increasing year by year.Therefore,developing advanced vegetable harvesting technology and high-quality vegetable harvesting machinery is of great significance.This paper designs a small electric leafy vegetable harvester,which can achieve automatic harvesting of Dapeng or small plots of vegetables,and can uniformly harvest leafy vegetables with similar growth.The specific research content is as follows:(1)Determination of overall design scheme and power demand analysis of self-propelled leafy vegetable harvester.According to the harvesting needs of vegetables,the harvester needs to complete tasks such as harvesting,conveying,and stubble height adjustment.In this design scheme,the cutting device uses a reciprocating cutting device,the conveying device uses a common belt conveyor,and the stubble height adjustment device uses a push rod device.Calculate the power requirements of each component and select the appropriate motor model.(2)Design and selection of main components of self-propelled leafy vegetable harvester.Firstly,the structure and working principle of the cutting device,the conveying device,the stubble height adjusting device,and the walking device are determined.Then the structure of the cutter,transmission mechanism,conveyor belt,drive shaft and other components was designed.Finally,on the premise of meeting the installation and work requirements,the rack was designed.Using Solidworks software to complete three-dimensional modeling of various components,and complete virtual prototype assembly,verifying the rationality of the machine design.(3)Kinematic analysis of reciprocating cutter for self-propelled leaf vegetable harvester.Four cutting charts with different cutting speeds were drawn,and the reasonable cutting methods were determined by analyzing the cutting charts;Using ADAMS software to conduct kinematics simulation of the cutter,analyze the displacement,velocity,and acceleration curves of the cutter,and verify the rationality of the cutting device design.(4)"Mechanical performance analysis of the drive shaft and frame components of a self-propelled leafy vegetable harvester.".Taking the finite element analysis method as an example,the structural linear static analysis of the drive shaft and frame is performed using the ANSYS Workbench software,and the displacement and stress nephogram are obtained.The results show that the stress and deformation of the drive shaft and frame are within the allowable range of materials;Conduct modal analysis on the frame to obtain the 6-order vibration mode of the frame,and analyze the weak parts of the frame,providing theoretical support for prototype processing.(5)Trial production and experimental analysis of self-propelled leaf vegetable harvester prototype.A prototype harvester for leafy vegetables was developed and designed for field experiments.The test data were analyzed using factors such as operation efficiency,leakage rate,and power consumption as test evaluation criteria.The results showed that the operating efficiency of the machine was 0.2h2/h,the missed cutting rate was 2.9%,and the power consumption was about 12.8 k W · h/hm2.This verified the feasibility of the self-propelled leafy vegetable harvester harvesting operation.The self-propelled leafy vegetable harvester designed in this article can complete the work of cutting,transporting,and collecting vegetables at one time,greatly reducing labor intensity and improving harvesting efficiency;In addition,the machine uses batteries as power,and the operation process is clean and pollution-free.