基于双偏心轮驱动机构基本参数的运动轨迹的分析与研究

The Analysis of the Trajectories Based on the Basic Parameters of the Double Eccentric Wheel Drive Mechanism

偏心轮在实现机构运动方面具有重要作用。根据偏心轮驱动的特性,推导双偏心轮机构了运动方程,进行了从动件运动轨迹综合分析,得到了双偏心轮基本参数(偏心距,偏位角等)的变化对轨迹的综合影响,分析了采用双偏心轮机构作为单向间歇运动机构的特点,综合了单向间歇运动特性与参数设计的关系。结果表明,偏心距e1、e2与偏心轮直径R1、R2相关,水平运动行程h与偏心距e2相关,e2越大,h可越大,同时产生的冲击越大,在设计中应综合考虑运动参数与载荷特性的关系,在满足运动规律的前提下,偏心距尽可能取小值。该结论为工程设计和应用提供了理论支撑。

The eccentric wheel plays an important role in the realization of mechanism motion aspects.According to the basic principle of mechanical motion,the law of motion of the double eccentric wheel drive is derived.The motion equation is derived according to the characteristics of eccentric.The comprehensive analysis of the system trajectory is conducted.The basic parameters(eccentricity,deviation angle,etc)of double eccentric on the influence of the trajectory are studied.The characteristic of the double eccentric wheel mechanism is analyzed as the unidirectional intermittent motion mechanism.The relationship between the characteristic of the unidirectional intermittent motion and the design of parameters is revealed.It is proved that the double eccentric instead of two degrees of freedom drive is feasible.The synchronization of system is effectively solved.Eccentricity e1 and e2 is related to eccentric diameter R1 and R2.Horizontal movement stroke h is related to eccentricity e2.The larger e2 gets,the largerh gets,and it will produce the greater impact.The relationship of motion parameters and load characteristics should be considered in the design.Under the premise of meeting the movement,a smaller value is taken as possible eccentricity.It provides theoretical support for selection for engineering design.