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一、前言在精密测量仪器中多数是利用各种弹性元件产生测量力。但是当测量行程较大时,达不到测量力恒定的要求。为克服上述缺点,各种大行程测量仪器上都有测量力恒定机构。近几年国内外生产的一些测长仪和测长机都先后采用拨叉——旋转臂式恒力机构,已取得了较好的效果,本文就此机构的设计方法进行了探讨。二、机构的传动原理与特点由图1可知,拨叉1绕轴A旋转,并固定在某一确定的位置上,它有一个直滑道,轴承组件2可
First, the foreword Most precision measuring instruments are the use of a variety of elastic components to generate measurement force. However, when the measuring stroke is large, the measurement force can not reach the constant requirement. To overcome the above shortcomings, a variety of large-stroke measuring instruments have a constant force measuring mechanism. In recent years, some length measuring instruments and length measuring machines produced at home and abroad have successively adopted the fork-rotary arm type constant force mechanism and achieved good results. The paper discusses the design method of this mechanism. Second, the principle and characteristics of the transmission mechanism From Figure 1 we can see that the fork 1 rotates around the axis A, and fixed in a certain position, it has a straight slide, bearing assembly 2