摆动输出活齿凸轮机构齿形设计与啮合力分析

Teeth Profile Design and Meshing Force Analysis of the Swing Output Cam Mechanism with Movable Teeth

为将匀速旋转输入运动转化为非匀速往复摆动输出运动,设计了可实现连续和间歇往复摆动输出的活齿凸轮机构的理论齿形,推导了激波盘和摆动盘封闭槽的工作廓面方程.在此基础上,根据力/矩平衡、赫兹定理建立了啮合副接触力分析的模型及其算法,并以相同负载和等摆角输出为例,分析了不同传动钢球数目和不同输出运动规律下活齿凸轮机构的啮合力特性,得到的结果为摆动输出活齿凸轮机构的承载能力分析、传动刚度估计和结构参数设计提供了依据.

In order to transform constant rotation motion into variable oscillation traverse output motion,a theoretical tooth profile,which could realize to output oscillation traverse motion in continuous or batch process,was designed,and then the working profile equations were derived for enclosed slot of actuating plate and the swing plate.On this basis,contact force models and algorithms of meshing pair were established in the light of force/torque balance equation and theory of Hertz,and taking the same load and equal swing angle as the example,the characteristics of meshing force of cam mechanism with movable teeth in the condition of different steel ball numbers and various motion laws were analyzed.The acquired result of meshing force analysis can be adopted as the theoretical basis for bearing capacity analysis,stiffness estimation,as well as structure design of the swing output cam mechanism with movable teeth.