基于线性输入输出关系的空间连杆机构设计  

Design of the Spatial Linkage Mechanism based on Linear Relationship between its Input and Output

作　　者：刘诗汉[1] 张文军[1] 

机构地区：[1]空军第一航空学院,河南信阳464000

出　　处：《机械传动》2012年第8期71-73,共3页Journal of Mechanical Transmission

摘　　要：通过对机构设计要求和初始条件的分析,提出两种典型的设计方案,一种是RSSR机构,另一种是双RSSR机构。以CATIA为平台,按自顶向下的设计思路,进行空间连杆机构的结构设计,并在CATIA运动模拟机构中进行运动模拟,比较了两种方案的运动传递特性。分析指出,在输入角度较小的情况下,两种机构的输入量与输出量之间均能保持良好的线性关系;适当选择构件尺寸,双RSSR机构能基本保持输出与输入相等。而RSSR机构能否保持输出与输入相等主要受到初始条件的限制。With respect to the designing requirements and constraints of the mechanism, two options, the RSSR mechanism and the dual - RSSR mechanism, are constructed based on CATIA with the top - down design ideas. The kinematic simulation of the model is conducted. The motion transmission characteristics of the two schemes are com- pared. A conclusion is drawn that for either RSSR mechanism or dual - RSSR mechanism the input and the output keep linear under the condition that the input angle is small. And for the dual - RSSR mechanism the output is ap- proximately the same as its input by optimizing parameters of the mechanism structure. But for RSSR mechanism, those depend on the initial condition.

关 键 词：空间连杆机构 线性 运动学设计 CATIA机构运动模拟 RSSR 

分 类 号：TH112[机械工程—机械设计及理论]