实现连架杆给定角位移的机构综合方法  

Synthesis Method for Planar Four-bar Linkages Given Angle Displacements of Rotating Links

作　　者：钱卫香[1] 韩建友[1] 

机构地区：[1]北京科技大学机械工程学院,北京100083

出　　处：《农业机械学报》2009年第5期222-226,共5页Transactions of the Chinese Society for Agricultural Machinery

摘　　要：对于给定的两连架杆4组对应角位移,可综合得到无穷多个机构解,要求设计者快速、准确地从中选取位置点、综合出满足各项设计要求的最优机构比较困难。为此,根据映射理论,提出把无限的布氏曲线所形成的无穷多机构解表示在有限的区间内,进而通过机构解分析得到感兴趣的所有机构属性直观图,包括机构的类型分布、缺陷分布、最小传动角和杆长比等。同时,为避免位置点及机构选取的盲目性,可考虑施加约束条件构成可行机构解区间,在此区间上绘制机构性能分析图,并确定满足实际工程需要的最优机构解。An infinite number of linkages can be produced for given tour angle-displacements of rotating links. It is difficult for designers to synthesize the best linkage through rapidly and precisely selecting curve points that ensure to satisfy every design condition. To solve this problem, based on mapping theory, an infinite number of mechanism solutions generated by Burmester curves were expressed as finite solution ranges. Through solution analysis, the mechanism property graphs of interest have been computed, including their types, defects, minimum transmission angles, link-length ratios, and so on. After design constraints were considered and imposed, feasible solution ranges could be calculated. To avoid aimlessness in choosing positions and mechanisms, property analysis graphs on the feasible solution ranges were displayed, along with which the optimized solution which satisfies practical design conditions can be synthesized.

关 键 词：铰链四杆机构 综合 性能分析 计算机辅助设计 

分 类 号：TH112.1[机械工程—机械设计及理论]