Ⅰ和Ⅱ型曲柄摇杆机构的计算机辅助设计  

Computer aided design of Ⅰ and Ⅱ type crank-rocker mechanism

作　　者：冯立艳 关铁成 杜哲民 李德胜 FENG Li-yan;GUAN Tie-cheng;DU Zhe-min;LI De-sheng(Mechanical Engineering Institute, North China University of Science and Technology, Tangshan 063210)

机构地区：[1]华北理工大学机械工程学院,河北唐山063210

出　　处：《机械设计》2018年第6期87-91,共5页Journal of Machine Design

基　　金：教育部在线研究基金资助项目(2016YB117)

摘　　要：定量分析比较了Ⅰ和Ⅱ型曲柄摇杆机构的传力性能和传动平稳性,推导出Ⅰ和Ⅱ型曲柄摇杆机构的各杆长关系、极位夹角θ的最大值、曲柄位置角ф的可行域,证明了各自最小传动角γ_(min)的出现位置。建立了摇杆摆角φ、极位夹角θ、杆长、位置角ф和最小传动角γ_(min)之间的数理关系。基于Mathematica编制了计算及绘图程序,可迅速直观地确定最小传动角最大的A点位置,快速实现摆角、行程速比系数且传力性能最优的Ⅰ和Ⅱ型曲柄摇杆机构的尺度设计。The power transmission and transmission stability performance of Ⅰ and Ⅱ type crank-rocker mechanism were analyzed and compared quantitatively, the relations on the bar length, the maximum value of extreme position angle θ, the feasible region of the position angle ф were derived, and the position of the minimum transmission angle γminwas proved. The mathematical relations between the angular stroke of rocker φ, the extreme position angle θ, the length, the position angle ф and the minimum transmission angle γminwas established. Basing on Mathematica, the program of calculation and drawing were established, which can confirm the position of the maximum A corresponding to the minimum transmission angle quickly and directly, can finish the dimensional design of Ⅰ and Ⅱ type crank-rocker mechanism with the optimum transmission performance in angular stroke of rocker and travel velocity-ratio coefficient known.

关 键 词：Ⅰ和Ⅱ型曲柄摇杆机构 极位夹角 摆角 最小传动角 位置角 

分 类 号：TH122[机械工程—机械设计及理论]