Design and Verification of the Variable Capacity Roller-Wheel Precision Rice Direct Seed-Metering Device

In view of the problems inability to continuously adjust seeding rate, small adjustment range, and low precision rice direct seed-metering device, a variable capacity roller-wheel device was designed, fabricated, verified. With method, rate could be adjusted steplessly with high through adjusting mechanism. Meanwhile, theoretical analysis parametric design critical components, such as wheel mechanism, were carried out. The rotation speed sphericity seeds, depth selected main influencing factors experiment. Then, full-factor experiment conducted, results bench validation experiments showed that average seeds per hill error controlled within 2%. performed best when seed meter 30 r/min, 52.7%, hole 6 mm. Compared conventional mechanical designed offered better performance. research provide practical references for development agriculture.