Authors

Abstract

To address the high damage rate and impurity content in corn ear picking, this study proposes the design of a gap-adjustable elastic low damage corn picking header. Theoretical analysis of the adaptive gap adjustment mechanism for the picking plate and the flexible picking mechanism will be conducted. Simulation experiments will be performed considering three factors: the stiffness coefficient of the compression spring, the rotational speed of the stalk-pulling roller, and the thickness of the flexible body. The test results indicate that the minimum collision force on the fruit cluster occurs when the stiffness coefficient of the compression spring is 36 N/mm, the rotational speed of the stalk-pulling roller is 700 r/min, and the thickness of the flexible body is 6 mm. When the header tilt angle was 25 degrees and the working speed was 3 km/h, using the stalk roller speed as the experimental variable, the collision force of the gap-adjustable elastic low-damage corn picking header was compared to that of the ordinary plate-type corn picking header. The results indicated that the collision force of the gap-adjustable elastic low-damage corn picking header was reduced by more than 25 % compared to the ordinary plate-type corn picking header.

Abstract in Chinese

为解决玉米割台摘穗损伤率高以及含杂率高的问题，本研究提出设计一台间隙可调弹性低损玉米摘穗割台。对摘穗板间隙自适应调节结构和柔性摘穗机构进行理论分析，在压缩弹簧的刚度系数、拉茎辊转速、柔性体厚度三因素下，进行仿真试验。试验表明，在压缩弹簧刚度系数为36 N/mm、拉茎辊转速700 r/min 、柔性体厚度为6 mm时，果穗碰撞力最小。在割台倾角为25o，作业速度为3 km/h时，以拉茎辊转速为试验变量，将间隙可调弹性低损玉米摘穗割台和普通板式玉米摘穗割台进行果穗碰撞力对比，试验结果表明，弹性低损玉米摘穗割台比普通板式玉米摘穗割台碰撞力减少25%以上。