Research And Development Of Self-propelled Toothed Rail Conveyor For Orchard On Gentle Slope

Our country is a big country in fruit production and fruit consumption,but many fruits are too concentrated in their ripening stages,and a large number of orchards are distributed in the mountains.The degree of mechanization of orchards is low,the production cost is high,and the transportation efficiency is low.Therefore,it is of great significance to develop a suitable self-propelled mountain orchard transporter.This paper takes the mountain tea factory and orchard in Nanping City,Fujian Province as the research object,and designs and manufactures a small load capacity self-propelled gentle slope orchard rack conveyor.First of all,this design innovatively designs the frame into two parts,front and rear,connected by a rotating shaft in the middle.When the road surface changes,the front and rear frames deflect at a certain angle,and the loadbearing wheels always fit the track to maintain smooth operation.Test verification,the operation effect is good.Secondly,this paper combines the characteristics of the existing monorail and double-track transporters at home and abroad,and designs a three-track track structure,which not only maintains the characteristics of the monorail’s strong climbing ability,but also inherits the advantages of the double-track vehicle’s strong stability.The transporter is 1.2m long,1.1m wide,running at a speed of 0.8～1.2m/s,and rated at 1.5 k W.The track can be laid according to the terrain and fixed on the ground by foot piles without the need for pouring concrete.The structure is simple and the cost is low.The maximum load is 120 kg,the maximum climbing angle is 20°,and the minimum turning radius is less than 5 m.In this paper,using modern design methods,the orchard conveyor is disassembled into several parts such as track system,transmission system,drive system,etc.The main contents of this paper are as follows:(1)Select the transmission scheme and power source of the selfpropelled mountain orchard rack conveyor,and then determine the design and selection of the transmission system by the motor parameters.(2)Complete the design of the drive wheel and rack structure and the structure of the whole vehicle,and conduct theoretical analysis on the force of the drive wheel and the strength of the track to verify whether the strength requirements are met.(3)Using ANSYS software to carry out static analysis and modal analysis of the track,it is concluded that the vibration excitation of the track during the working process is far less than the minimum natural frequency of the track of 199.75 Hz,and the track meets the requirements of smooth running.(4)Using ANSYS and ABAQUS software to study the track connection and pile-soil effect of the orchard transporter,the offset of the track connection is 4.11 mm,the offset is small,and the track connection is stable.The detachable foot pile is analyzed by ABAQUS to solve the pressure and deflection of the foot pile,and the soil displacement and foot pile deformation are obtained to meet the requirements of use.(5)Carry out the experimental analysis of the track strength,and combine the experimental results with the theoretical analysis and simulation results to further optimize the track structure.After completing the assembly of the whole machine and conducting field experiments,the operation results show that the orchard conveyor can meet the load capacity requirement of 120 kg.