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| Design and test of picking seedling mechanism of small full-automatic transplanter for plug seedlings |
| 1. School of Agricultural Engineering, Jiangsu University, Zhenjiang，Jiangsu 212013，China； 2. Institute of Intelligent Robot, Jiangsu University, Zhenjiang，Jiangsu 212013，China |
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Abstract To solve the size limitation of domestic small greenhouse vegetable greenhouse, a small full-automatic transplanter was designed. To improve the success rate of taking and putting seedlings and reduce the damage of plug seedlings, the seedling taking mechanism was emphatically designed. In the seedling picking mechanism，the pneumatic and brake line flexible variable distance mechanism was used to realize the variable distance seedling throwing function, which was used together with the direct acting reciprocating seedling sorting mechanism. By the proposed mechanism，the static seedling feeding and the static seedling receiving could be realized to improve the success rate of seedling taking and feeding and avoid seedling hanging. The effect of seedling taking and feeding was tested through experiments. The results show that for the fibrous root seedlings of cucumber,when the planting frequency is 40 plants·min-1· row-1, the success rate of taking seedlings is 99.31%, and the success rate of throwing seedlings is 99.31% with the comprehensive success rate of 98.61%. When the planting frequency is 60 plants·min-1·row-1, the success rate of taking seedlings is 98.61%, and the success rate of throwing seedling is 99.29% with the comprehensive success rate is 97.22%. For the taproot seedlings of pepper,when the planting frequency is 60 plants·min-1·row-1, the success rate of taking seedlings is 97.92%, and the success rate of throwing seeding is 99.29% with the comprehensive success rate of 95.83%. According to the test results, the proposed mechanism can meet the requirements of taking and throwing seedlings of pot seedlings, and it is suitable for taking and throwing seedlings of different vegetables.
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Received: 17 August 2020
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2022, Vol. 43 
