圆盘式精密播种制钵机运动学优化设计

针对圆盘式精密播种制钵机的钵盘定位精确、冲压机构和钵盘机构之间运动配合紧凑、易发生运动干涉等问题,在分析圆盘式精密播种制钵机工作原理的基础上,结合新的精密播种制钵工序,对制钵机中的冲压机构和钵盘机构分别进行运动学分析;研究两者的运动配合规律,推导出相应的位移方程,并在VB6.0平台上进行运动学仿真模拟,得到了避免机构运动发生干涉的条件和满足机构运动要求的设计参数,实现了圆盘式精密播种制钵机的精密播种和营养钵体制造功能.机构运动仿真表明:冲压制钵的时间在一个运动周期内所占的比例应小于58.4%,制钵机可以避免运动干涉,实现精密播种和制造营养钵.

Kinematical analysis and optimal design of discal precise seeding machine

Based on the new molding process of earth bowl, the work principle of earth bowl machine was analyzed in this paper. To realize geneva wheel precise position and avoid mechanical collision, an optimal design of earth bowl machine was proposed. The kinematical analysis of push mechanism and geneva wheel mechanism of the machine were presented. Their cooperative movements were also analyzed and their displacement equations deduced. By kinematical simulation in Vb6.0 platform, the conditions for overcoming mechanical collision were derived and the mechanical design parameters were optimized. Kinematical simulation results show that the time ratio of push mechanism movement must be lower than 58.4%during one motion cycle of earth bowl machine. Thus, earth bowl machine was found to be able to accomplish precise seeding and nutritive pot manufacture, but also successfully avoid mechanical collision.