铰链点可互换的近似直线机构综合方法及解域研究  

Study on Synthesis Method and Solution-region of Approximate Straight-line Linkage with Two Inter-convertible Pivots

作　　者：尹来容[1,2] 黄娟[3] 胡林[1] 刘鑫[1] 张志勇[1] 

机构地区：[1]长沙理工大学,长沙410114 [2]湖南省工程车辆轻量化与可靠性技术重点实验室,长沙410114 [3]湖南农业大学东方科技学院,长沙410012

出　　处：《中国机械工程》2016年第24期3351-3354,共4页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(51305047);湖南省科技计划资助重点项目(2015GK3020);湖南省重点实验室开放基金资助项目(KF1505)

摘　　要：基于拐点圆极点理论,给出了一种可以综合出无穷多铰链四杆近似直线机构的方法。用解析法证明了该方法综合出近似直线机构的一个连架杆的固定铰链点和对应动铰链点可以互换,铰链点互换前后得到的两个机构具有相同的鲍尔点和直线方向,另外一个连架杆不变。推导了综合曲柄摇杆直线机构的公式,并绘制了曲柄摇杆机构解域图。计算示例表明该方法简单有效,能迅速综合出曲柄摇杆直线机构,且综合出的机构动铰链点和固定铰链点可互换。所得到的近似直线机构为实际工程应用提供了更多选择。A synthesis method of four-bar approximate straight-line mechanism was presented based on inflection circle pole theorem, which might produce an infinite number of mechanisms. An analytic method was introduced to prove that the synthesized mechanism might make the fixed pivot of side link and its corresponding moving pivot inter-convertible. The two synthesized linkages with two inter-convertible pivots contained the same Ball point and straight-line direction. The other side link remained unchanged. The synthesizing formulas of crank-rock mechanism were derived and the solution domains were plotted. The given examples show that the method is simple and efficient to synthesize crank-rock mechanism, and the synthesized mechanisms have two inter-convertible pivots. This approximate straight-line linkage may provide more choices for practical engineering applications.

关 键 词：直线机构 拐点圆 圆点曲线 机构综合 

分 类 号：TH112.1[机械工程—机械设计及理论]