辣椒穴盘苗多爪并行式夹茎取投苗装置设计与试验OA

In response to the issues prevalent in existing automatic plug seedling transplanting,where the pot-clamping method often leads to pot damage and reduced seedling picking success rates,and the stem-clamping method tends to cause seedling injury or incomplete pot extraction,a multi-claw parallel stem-gripping device for seedling picking and dropping was designed and tested in this study.This device adopts a planar linkage-slotted composite mechanism,consisting of 10 sets of symmetrically distributed clamping units and slotted guide units.Driven by clamping cylinders and left-right helical screws,the clamping arms move along slots on the fixed plate,transverse moving plate,and longitudinal moving plate,enabling opening,closing,and reciprocating lateral movements.Through coordinated motion of multiple linkages and plates,the device accomplishes seedling clamping,transferring,and dropping actions.It can simultaneously pick up 10 plug seedlings and release them sequentially,significantly improving the efficiency of seedling picking and dropping.A prototype test bench was constructed,and seedling picking and dropping tests were conducted using"Zhongnong Lüheng Xianjiao 363"pepper plug seedlings aged 35-50 days.The evaluation criteria included seedling picking success rate,seedling injury rate,and seedling dropping success rate.The results demonstrated that with polyurethane clamping arms and under the condition of a 1 s delay for both the motor and cylinder,a seedling tray motor pulse of 6 400,and a seedling transfer motor pulse of 3 600,the device achieved a picking and dropping frequency of 60 seedlings/min,with seedling picking success rate of 97.33%,seedling dropping success rate of 95.89%,and 0%seedling injury rate.This study can provide a reference for improving and optimizing transplanting techniques for pepper,tomato,and other dry-land crop plug seedlings.