鸡蛋质量大小分级生产线过渡输送装置的机构运动分析

针对国产鸡蛋质量大小分级生产线效率低、破损率大的问题,设计1种鸡蛋质量大小分级生产线过渡输送装置,它能将鸡蛋从称质量后的6排转化为单排并运输到分级执行装置,并将鸡蛋从长轴水平位置翻转成长轴铅垂位置,以便装盘时鸡蛋钝端朝上。利用Solidworks建立完整的三维模型,通过三维模型对过渡输送装置的结构和工作原理进行详细说明;采用解析法对装置执行机构的运动轨迹、运动速度以及与偏心链轮传动机构速度的匹配进行分析;建立主、从动链轮瞬时传动比与主动链轮转角的关系方程并使用Matlab对其求解,获得执行机构与传动机构的精准位置关系。经分析得到了执行机构的关键设计尺寸以及偏心链轮的偏心角等参数,为样机的试制与安装提供理论基础。根据分析得到的数据试制样机成功,该装置6排称质量单排分级,效率较一般生产线提高6倍,过渡装置速度的精确匹配,使得鸡蛋破损率下降。

Motion analysis of eccentric sprocket on egg weight grading production line

A transition device was developed to solve the low efficiency,high breakage rate and low space utilization of domestic egg weight classification machine. It can transform the egg transport form from six row to single row and turn the eggs over with turning the long axis from horizontal to vertical to pack more quickly. Based on the three-dimensional model built,the kinematics of dynamic part and operative part were analyzed. The dynamic part is made up of a inscribed double eccentric sprocket structure. The solving equations of master-slave sprocket were listed between angular displacement and drive ratio,and the precise relationship of matching position between the operative and the power part was found out.