基于杆长条件的串联机构无冲击设计方法的研究

在生产和航天的诸多应用中, 对机构缓冲吸震有着较高的要求。串联机构在其中应用较多, 目前还未建立统一的针对串联无冲击机构的设计方法。根据串联机构周期性的运动特性, 文章提出一种无冲击串联机构的设计方法, 在建立串联机构首尾基本机构从动件加速度方程的基础上, 求解串联机构满足无冲击规律的约束方程, 实现机构的尺度设计, 得到平面串联机构在初始位置时无冲击的运动规律。通过 Adams 建立仿真模型分析和对比试验, 验证了该设计方法的可靠性。

For many industrial production and aerospace applications, there are high requirements for mechanism buffering and shock absorption. Tandem mechanism is one of the most commonly used solutions for this problem, but there is no unified design method for shock-free tandem mechanism at present. In this paper, a design method for shock-free tandem mechanism based on the periodic motion characteristics of tandem mechanism is proposed. On the basis of establishing the head-to-tail basic mechanism follower acceleration equation of tandem mechanism, the constraint equation of tandem mechanism that satisfies zero impact law is solved, the scale design of the mechanism is performed, and the motion law of the plane tandem mechanism at initial position with zero impact is derived. The reliability of the design method is verified by the simulation model analysis and comparative test based on Adams.