• CN:11-2187/TH
  • ISSN:0577-6686

›› 2005, Vol. 41 ›› Issue (8): 140-143.

• 论文 • 上一篇    下一篇

平面图形放缩机构

廖启征;李端玲   

  1. 北京邮电大学自动化学院
  • 发布日期:2005-08-15

MECHANISMS FOR SCALING PLANAR GRAPHS

Liao Qizheng;Li Duanling   

  1. Automation School, Beijing University of Posts and Telecommunications
  • Published:2005-08-15

摘要: 放大尺是由单个平行四边形机构组成的,它可以对两点间的距离进行按比例的放大或缩小,但是不能对平面上的几个点间的距离同时进行放大或缩小,如果将多个平行四边形按照一定的顺序和角度连接起来,再加上一个驱动就可以完成这一工作。按这种方式构成的机构既可以是单自由度的普通机构,也可以是单自由度的过约束机构。加上一些带标记的滑动副,这种机构可以组成一些由直线段构成的大小可变的图形。

关键词: 过约束机构, 平面放缩, 平行四边形机构

Abstract: Traditional pantograph mechanism consists of a parallelogram with two extended sides. It can scale the distance from the pole to a given point. However it can not scale the distance between any given points. This goal is achieved by using inter-connected multi parallelograms with a link chosen as a driver. The result is a class of linkages that can enlarge or shrink a planar graph by driving a revolute pair. These mechan- isms can be single degree-of-freedom or over-constrained.

Key words: Overconstrained linkages, Parallelogram mechanisms, Planar pantograph

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