| In order to meet the agronomic technical requirements of dry-land whole film double furrow sowing, a corn precision seeder was designed. To realize the smooth working of the seeder, and to ensure the sowing depth under film, the profiling mechanism of bidirectional parallelogram linkage was adopted. According to the initial work angle and the maximum amount of profiling, all size parameters of the profiling mechanism were determined. The profiling volume in vertical direction reached to 98.35 mm, and the profiling angle in horizontal direction reached to 15.2°, which met the requirements of profiling sowing. To reduce missed sowing, and to reduce the rate of no-seed holes, the open-type dibbling wheel with cam-plane connecting rod was adopted, With ADAMS software, the hole-making process of the seeder was simulated and analyzed, and the influence of slipping rate of dibbling wheel to shape of holes was explored, so as to optimize the forward speed of the seeder and to reduce the hole dislocation rate. The field test results showed that, by using the corn precision seeder for dry-land whole film double furrow sowing, the rate of no-seed holes was 0.9%, the pass rate of seed number per hole was 93.6%, the pass rate of sowing depth under film was 91.8%, and the hole dislocation rate was 2.5%, so its working quality could meet the requirement of technical standards. |