球面四杆机构的空间模型及尺寸型

基于特征球面四杆机构的概念，将球面四杆机构分为三类，并建立机构的尺寸型空间模型。每个空间模型可划分为若干个子区间，每个子区间都对应着一族球面四杆机构。按本文提出的尺寸型表示方法，可在全封闭图面内表示球面四杆机构的尺寸型，并在其上绘制出有工程应用价值的机构性能图谱。

SPACE MODELS AND DIMENSI0NAL TYPES OF SPHERICAL FOUR-BAR LINKAGES

On the basis of the concept of characteristic spherical four-bar linkages, all spherical four-bar linkages can be classified into three classes, and the space models of spherical four-bar linkages can also be established. Every space model can be divided into several regions. Each region is equivalent to a group of spherical four-bar linkages.With the help of the method given by this paper, we can discuss the dimensional types and plot the character diagrams, with which we can design spherical four-bar linkages conveniently, of spherical four-bar linkages ia a series of closed planes subregions.