Bionic Design and Parameter Optimization of Rotating and Fixed Stem- and Leaf-Cutting Devices for Carrot Combine Harvesters

To solve the problems of high rhizome damage and low net cutting during carrot combine harvesting, following research was performed. The designed stem- leaf-cutting device taken as object, a bionic design idea adopted. MATLAB software used to extract optimize tibial curve mantis forelimb, its shape applied edges single-disc rotating cutter straight fixed cutter, whose key structural parameters were determined. kinematic dynamic models stems, leaves established explore critical conditions smooth cutting. A single-factor experiment results show that stems leaf increased when rotation speed clamping conveyor pulley increased. flatness surface first subsequently decreased. At 102 r/min, 2.86%, 92.82%, 85.39%. disc increased, while When reached 165 damage, leaves, 1.97%, 89.59%, 91.48%, respectively. bench test field showed performance optimized group is significantly better than conventional knife group. 4.01%, 92.05%, 84.05%, respectively, which meet agronomic requirements for harvesting.