关键词: 玉米穴播机, 垂直入土, 垂直出土, 平行四连杆机构

Abstract: Since the traditional hole seeding machine is fixed on the wheel ring, the movement trajectory of the burrowing machine is cycloid during the operation of the machine and tool. The trajectory is crossed between the insertion and the excavation, which is easy to cause film picking, film tearing and seed point dislocation, etc. Based on the research of the existing vertical submerged corn planter, this paper designs a vertical submerged maize planter mechanism. The design adopts a parallel fourbar linkage mechanism to ensure the vertical movement of the burrower during the excavation and insertion process. The trajectory of the hole seeding machine is “arch”, which simulates the vertical action of the manual operation process, and maintains the vertical downward and upward movement. During the seeding process, it is avoided that the film is not picked or torn, and the work efficiency is improved. During the seeding operation, the burrower can ensure that the absolute speed is zero in the horizontal speed, the entry angle is 48.59°, the width of the intersection curve of the contact point with the ground is 10.798 mm, and the width of the Vshaped wedge angle at the time of excavation is 10.956 mm. At the same time, the parametric design of the whole machine is carried out by using SolidWorks 3D design software, and the simulation analysis of the whole machine is carried out by using SolidWorks motion and ADAMS. Trials in the field, showed that the sowing quality of the vertical submerged corn seeder could meet the requirements of the national agricultural standard. The porosity rate was 0.62%, the seeding depth reached 94.2% at 25 mm, the dislocation rate of the seed holes was 0.8%, and the film damage rate was 48.9 mm/m2, which met various agronomic technical indicators.

Key words: corn hole seeding machine, vertical submerged, vertical excavation, parallel fourbar linkage