关键词: 洋葱, 收获机, 农业机械, 挖掘铲, 模态分析

Abstract: Aiming at the problems of less function and low net rate of existing onion harvesters, a single ridge onion combine harvester is designed with the goal of ridge onion harvesting. It is mainly composed of excavation device, transfer conveying device, onion seedling separation device, sorting device, collection device and other parts. It can complete the excavation, onion soil separation, seedling removal, sorting, collection and other operations of a ridge of onion at one time. On the basis of expounding the overall structure and working principle, the modal analysis of the rollerdriven digging shovel is carried out to judge that the digging shovel will not produce resonance and fatigue damage in its work, and the static analysis of the conveying rod is carried out to judge that the stiffness of the rod meets the requirements, and the overall deformation is relatively weak, which will not affect the use of the conveying rod. The field test results show that when the rotation speed of the digging shovel is 288r/min, the forward speed of the harvester is 0.58m/s, and the linear speed of the onion-soil separation device is 0.91m/s, the corresponding digging rate is 97.433%, and the damage rate is 2.981%.

Key words: onion； harvesting machine； agricultural machinery, digging shovel, modal analysis