中文摘要：

针对现有宽窄行分插机构存在斜取秧和大穴口问题,提出一种由椭圆锥齿轮-交错圆柱齿轮混合传动的空间行星轮系宽窄行分插机构。分析了椭圆锥齿轮的传动特性,建立了机构的运动学模型。通过分析插秧轨迹的横向线位移、横向插秧穴口边长与传动齿轮交错角的关系,得出椭圆锥齿轮-交错圆柱齿轮混合传动方式可以兼顾斜置式和齿轮交错传动式的小穴口、直取秧的优点。开发了宽窄行分插机构参数优化软件,进行了机构的运动特征分析,并通过人机交互方式优化了一组满足宽窄行插秧机的机构参数。利用仿真软件ADAMS实现了椭圆锥齿轮齿廓的设计,并结合三维建模软件进行了分插机构的仿真。加工了分插机构实物模型,进行了试验台测试,得出椭圆锥齿轮-交错圆柱齿轮混合传动分插机构可以满足水稻宽窄行插秧的要求。

英文摘要：

In order to solve the problems such as grasping seedling obliquely and shaping wider plant hole,a wide-narrow distance transplanting mechanism with spatial planetary gear train composed of elliptical bevel gears and crossed cylindrical gears was put forward.Kinematical model was established based on the transmission characteristics.Furthermore,the proposed mechanism was proved capable of taking the advantages,which known as grasping seedling more vertically and shaping narrower plant hole,by the analysis on relation among the lateral offsets,lateral plant hole of spatial planting trajectory and shaft angle.A optimization program about wide-narrow distance transplanting mechanism was written to research on the kinematics,and a set of optimal parameters meeting the working requirements of wide-narrow distance rice transplanter was obtained by the method of human-computer conversation afterward.Then configuration of elliptical bevel gear was achieved and virtual prototype test was performed by the software named ADAMS.Finally,a model machining of the transplanting mechanism as well as its testing was made,and concluding that the structural design and its parameters was suited to the requirements of wide-narrow distance rice transplanter.