Abstract
Aiming at the problem that the banana de-handing device has poor radial deployment to the banana bunch stalk during the mechanized banana de-handing procedure, this paper presented a ring deployable mechanism based on a set of planar seven-bar linkages. It consists of multiple basic deployable units, which has great folding/deploying performance and is suitable for manufacturing a banana de-handing device, the diameter of which can be variably larger. The kinematics analysis of the mechanism was done, and the trajectory in space was obtained. When the mechanism is fully deployed, the diameter is 164 mm. The ratio of the folded height to the deployed diameter is 0.732, the ratio of the folded diameter to the deployed diameter is 0.262, and the ratio of the folded volume to the maximum of the deployed volume is 0.069. An experimental prototype of 500, 500, and 768 mm in length, width, and height was manufactured, and the deploying performance was analyzed to show the feasibility. Finally, experimental results show that 71.43% of the banana hands are de-handed successfully. The mechanism has a great deploying effect on banana bunch stalk, and the quality of the banana crown incision is good.
Highlights
The banana (Musa spp.), is the most consumed fruit in the world, and one of the most important crops in tropical and subtropical regions
This paper proposed and studied a ring deployable mechanism based on a set of planar sevenbar linkages, and the results proved that it is feasible to manufacture a banana de-handing cutter with a fixed center and larger variable diameters
The geometric modeling method of the symmetrical shape deployable cutter is introduced in detail
Summary
The banana (Musa spp.), is the most consumed fruit in the world, and one of the most important crops in tropical and subtropical regions. Banana de-handing is one part of the banana post-harvesting procedure, which is between field picking, ropeway transportation, and cleaning disinfection, and packaging for sale. The degree of mechanization of banana de-handing in banana orchards and post-harvesting factories at home and abroad is very low, basically relying on employees with simple de-handing tools to work. Banana de-handing purely by human is inefficient, and the time and labor costs are high, which is not conducive to the development of the mechanization of the banana post-harvesting industry
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