一种新型曲柄五连杆移栽机栽植机构平衡分析

针对贵州丘陵山地地块小、坡度大的问题,设计了一种双曲柄五连杆单鸭嘴栽植机构,并成功应用于2 ZBZ-2 A型移栽机。首先阐述了2 ZBZ-2 A型移栽机结构形式及栽植部机构的工作原理,然后再利用质量代换法分析了五连杆机构平衡条件,得出机构平衡公式;并根据l_1、l_2、l_3、l_4、l_5的原始长度、l_2杆质量,计算出l_1杆飞轮配重质量矩为3.15kg·mm,l_4杆飞轮配重质量矩为6.24kg·mm,栽植臂鸭嘴质量矩为21.4kg·mm,可实现机构运动平衡。最后,采用Adams得出机构栽植点速度、位移仿真曲线,结合验证性试验数据,结果表明:该机构具有较强的稳定和适应性,满足设计要求。

Balance Analysis of Planting Mechanism of a New Type of Crank Five-bar Linkages Transplanter

To the problems of small massif and large slope in Guizhou, a type of double cranks five-bar linkages single duckbill plant mechanism was designed and successfully applied in 2ZBZ –2A type transplanting machine. Firstly, the structure and working principle of 2ZBZ –2A type transplanting machine was stated. Then, balance conditions of five-bar linkages was analyzed with mass substitution method, and the mechanism balance equation was derived. On the basis of original length of l1, l2, l3, l4, l5 and mass of l2, the flywheel mass moment of l4and l5were working out as 3. 15kg· mm, 6. 24kg ?mm respectively, and 21. 4kg ?mm for planting arm duckbill, the results indicated that the mechanism bal-ance can be achieved. Finally, mechanism planting speed, displacement simulation curve were obtained through the software adams, combining with the verification test data, the results show that the mechanism has great stability and adaptability which satisfying design demands.