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四连杆机构在一定的条件下,其连杆上点的轨迹具有直线或近似直线部分.这种机构通常有两种用途:其一,在连杆和机架间联接一基本杆组,使从动件实现间歇运动,这些已在上节中介绍;其二,直接利用直线轨迹部分使从动件完成某种工艺动作,如摄影机拉片,起重机吊送货物及织布机引纬等等.关于典型的直线导向机构,有关书刊已有介绍,如参考文献[31]、[4]和[11]等.但是,在各种机器中实际需要和具体条件是多种多样的,这种“对号入座”的设计方法在不少情况下尚难以获得圆满的结果.为此,本节在分析已有的直线导向机构的基础上,将着
Under certain conditions, the four-bar linkage mechanism has a straight line or an approximately straight-line locus on the connecting rod, which usually has two purposes: firstly, connecting a basic bar set between the connecting bar and the frame so that Follower to achieve intermittent movement, which has been introduced in the previous section; Second, the direct use of linear trajectory part of the follower to complete some kind of craft moves, such as camera pull-tab, crane crane to send goods and weaving machines weft insertion Etc. For the typical linear guides, the books and periodicals have been introduced, such as references [31], [4] and [11], etc. However, the actual needs and specific conditions in various machines are manifold In many cases, it is still difficult to obtain a satisfactory result because of the design method of “condemnation.” Based on the analysis of the existing linear guide mechanism,