| Peanut is widely cultivated in the world’s major oil crops and cash crops and is also oneof the agricultural products which are China’s most internationally competitive foreignexchange earnings. Peanut harvest is seasonal, and it has high labor intensity and large harvestlosses as well, which has seriously hampered the development of China’s peanut industry.Therefore, the requirements of the community on the development of peanut mechanizationare extremely urgent.According to problems above-mentioned and there are a large number of smallfour-wheel tractors in rural areas. Taking use of method of combining of agriculturalmachinery and agronomy, and according to the agronomic requirements of peanut harvest, apeanut harvesting machine supporting the use of the small four-wheel tractor was designed.The machine could complete the excavation, earth shaking and laying. All parts of the designwere completed with the help of AutoCAD and3D graphics software Pro/E. After completingthe virtual assembly of the machine by Pro/E, kinematic analysis and finite element analysisof the key components had been done with the use of relevant software, and its feasibility hadbeen verified.The selection and design of the device components were completed by theoreticalcalculations. The frame is three-point suspension. Due to the need to change the powersteering, bevel gear-straight teeth type reducer was designed. Digging shovel was the overallvibration level, the front was designed for "waves-style", rear connection with the pulverizergate. Transport conveying device includes elevator chain and elevator roller. In order to solvethe problem that the big working resistance of the digging shovel, the eccentric vibratorymechanism was designed based on the mechanism of resistance decrease vibratory soilcutting. The eccentric vibratory mechanism was composed mainly by eccentric wheel, linkage,shaker arm. The tractor’s output shaft output the power when it is working. The power ispassed to the gearbox by universal coupling, and then it drive the eccentric agencies turn. Thevibration horn is driven by linkage does simple harmonic vibration. The digging shovel worksin soil by vibration of the form. The kinematic simulation analysis of mining and vibrating device had been done byADAMS software, getting results that in the same case of all other variables, the amplitude ofshovel tip would decrease with the b-value increasing, and when b was equal to370mm andan amplitude was equal to10mm, eccentricity e would be equal to5mm, which was the bestsolution for the design; finite element analysis of digging shovel had been done usingPro/MECHANICA. It is shown from cloud image displacement the stress cloud and straincontour that the maximum stress and ultimate elongation of the digging shovel and shovelhandle are both within the allowable range to meet the requirements.Field test results show that the vibration digging device can improve the efficiency ofremoving soil and reduce resistance. The harvest of peanut is in line with the requirements ofthe job quality.The design of vibrating harvest machine of the peanut combined the features of thecurrent agricultural development. It mainly applied the main operating principle of thevibratory subsoiler to the peanut harvest machine. Digging shovel could dig vines and fruitsof peanuts and at the same time soil could be broken up, improving the efficiency of the soilclearing, decreasing the labor intensity of farmers and decreasing the cost of harvestingoperations. |
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