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介绍一种新型水稻插秧机分插机构──偏心链轮分插机构，其传动部分是由５个偏心链轮组成：１个太阳轮、１对行星轮（与载植臂团结）和１对张紧轮。在优化太阳轮和行星轮参数时，把取秧角、插秧角、秧针轨迹、轨迹高度作为目标函数，在确定目标函数时，要求适应双季稻插秧，在优化张紧轮参数时，把链条处于张紧状态下，其长度变化最小作为目标函数。在理论上确定了主要机构参数，研制了分插机构传动部分，并通过试验台验证了理论模型和优化方法。
Introduce a new type of rice transplanter sub-mechanism - eccentric sprocket mechanism, the transmission part is composed of five eccentric sprocket: a sun gear, a pair of planets (with the carrying arm unity) and a pair of Tensioner. When optimizing the parameters of the sun gear and the planetary gear, taking the seedling raising angle, the planting angle, the seedling trajectory and the trajectory height as the objective functions, when determining the objective function, it is required to adapt to double-season rice planting. When optimizing the parameters of the tensioner, When the chain is under tension, the change of its length is the minimum as an objective function. In theory, the main mechanism parameters were determined and the transmission part of the add-drop mechanism was developed. The theoretical model and optimization method were verified by the test rig.