在滚珠丝杠传动的螺母中,可以把内螺纹表面相对于外径的径向跳动这个参数看成是尺寸h或H的变化(图1)。螺纹要通过装回珠槽垫片的椭圆形窗口。因此,测量头必须严格按螺距在螺旋槽表面上移动,且不允许掉入螺纹断开的窗口内。从结构上看,测量尺寸H的变化是比较方便的。 苏联设计制 In a ball screw driven nut, the radial runout of the female thread surface relative to the outside diameter can be considered as a change in dimension h or H (Figure 1). The thread is passed through the oval window with the bead washer installed. Therefore, the measuring head must be moved strictly on the surface of the helical groove by the thread pitch and must not fall into the window with the thread broken. From a structural point of view, it is convenient to measure the change in size H. Soviet design system