Design and theoretical analysis of comb type Lycium barbarum picking machine
In order to achieve the goal of the mechanized harvesting of Lycium barbarum,and improve the pure har-vesting rate of Lycium barbarum and reduce the damage rate during the mechanized harvesting,a comb type picker with of flexible-material-made comb teeth is proposed,which during the harvesting process makes the ripe fruits fall off from the fruit branches and complete the picking work through the impact between the brush teeth and the fruits.Through the measurement and analysis of the natural characteristics and physical parameters of Lycium barbarum,the parameters of the comb were designed,and the prototype model was built using Solidworks software,then built up a prototype machine by choosing all kinds of building materials of picking machine.In order to analyze the process of the fruit harvesting and verify the feasibility of the prototype picker,through static analysis and Hertzian collision theory,the relationship between the speed of the picking tooth and the impact force was derived.In order to show the simulation working of the picker more intuitively,the dynamic analysis of the harvesting process was carried out using Adams software,during the whole workflow of the prototype picker,the peak force which Lycium barbarum was re-ceiving was 0.83 N while the picking tooth's speed was 57 rpm,and the picking experiment of local Ningqi No.1 in Nuomuhong Farm in Qinghai showed that the pure harvesting rate of the ripe fruit was 96.84％and the damage rate was 8.76％,which verified that the prototype picker is meeting the work requirements of Lycium barbarum harvesting.
lycium barbarumcomb type pickingmachine designtheoretical analysissimulation analysis
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