目的 以不同长度尺寸的医用胶带和包装纸盒为对象，设计一种由取盒机构、推料机构、传送机构、封盒机构及机架组成的自动装盒机，实现对不同长度盒型的包装作业。方法 以圆柱齿轮行星轮系旋转式取盒机构为基础，设计优化一种圆-椭圆齿轮行星轮系取盒机构；设计具有可调节功能的推料机构、封盒机构及传送机构；通过试制并调试样机，进行2种规格胶带和纸盒的试包装。结果 新型取盒机构在取放盒点的加速度比原机构减少了14.3%，在纸盒与阻挡物碰撞点的速度也比原机构减少了14.3%，样机可进行不同长度规格物料包装作业。结论 圆-椭圆齿轮行星轮系取盒机构增加了装盒机取放盒的可靠性，装盒机设计合理，能适应不同长度尺寸盒型的装盒需求，为包装行业同类应用提供参照。

Taking different length sizes of medical tapes and packaging cartons as the object, the work aims to design an automatic cartoning machine which consists of box-taking mechanism, pushing mechanism, delivery mechanism, box-sealing mechanism and framework to package cartons with different lengths. On the basis of studying the traditional box-taking mechanism of planetary gear train with cylindrical gears, the box-taking mechanism of planetary gear train with cylindrical-elliptical gears was designed and optimized. Several mechanisms with regulating function to push medical tap, seal the carton and deliver the medical tap, were designed. The prototype was manufactured and adjustment of each packaging process was carried out to package two kinds of specifications tapes and cartons experimentally. The acceleration of the new box-taking mechanism was 14.3% less than that of the traditional mechanism at the point to taking or putting the carton. The velocity of the new mechanism is also reduced by 14.3% at the point of collision point between carton and obstacle. The prototype could be used for packaging materials with different length specifications. The box-taking mechanism of planetary gear train with cylindrical-elliptical gears increases the reliability of the cartoning machine. The design is reasonable and suitable for packing demand to cartons with different length sizes. It can provide reference for similar applications in packaging industry.