间歇移动烟苗移栽机成穴机构设计与运动特性分析

Design and Locomotion Characteristics Analysis of Cavitation Mechanism of Intermittent Mobile Tobacco Seedlings Transplanter

为提高烟苗杯罩式井窖移栽技术的作业效率,设计了一种凸轮摆杆式的间歇移动烟苗移栽机成穴机构。通过分析凸轮摆杆式成穴机构的结构和工作原理,基于解析法建立了成穴机构运动数学模型;再利用RecurDyn多体动力学软件建立成穴机构虚拟样机模型,获得了成穴钻头顶点位移、速度及加速度运动特性。结果表明:成穴钻头y方向位移行程约309mm,成穴深度可达209mm,速度和加速度特性均呈周期性波动,且幅度较小,均在合理范围内;由此表明:成穴机构具有稳定良好的成穴运动特性,且几何参数设计满足井窖移栽技术要求,可为后续研制间歇移动式烟苗移栽机提供重要参考依据。

In order to improve the working efficiency of the cupping-type well-celler transplanting technology of tobacco seedlings,this paper designed a cavitation mechanism of cam-swing link type intermittent moving tobacco seedlings transplanter.Through the analysis of the structure and working principle of the cam-swing link type forming mechanism,the mathematical model of the cavitation mechanism is established based on the analytical method.Then the RecurDyn multi-body dynamics software is used to establish the virtual prototype model of the cavitation mechanism.The vertex displacement,velocity and acceleration Locomotion characteristics of the cave-forming drill are obtained.The results show that the displacement stroke of thecave-forming drill in the y direction is about 309mm,and the depth of the hole formation can reach 209mm.The velocity and acceleration characteristics are cyclical fluctuations,and the amplitude is small,all within a reasonable range.It shows that the cavitation mechanism has stable and good cavitation movement characteristics,and the geometric parameter design meets the requirements of well-celler transplanting technology,which provides an important reference for the subsequent development of intermittent mobile tobacco seedlings transplanter.