在各种齿轮加工机床、自动、半自动机床中,一般都采用交换齿轮来变换主传动及辅助传动速度。在生产中,多半由两个人同时调整不同部分,有时往往由于二者连系不协调,或思想稍一疏忽,一人还在配换齿轮,另一人将机床开动,造成人身和机床事故。为了安全生产,避免发生事故,缩短生产辅 In a variety of gear processing machine tools, automatic, semi-automatic machine tools, the exchange of gears are generally used to transform the main drive and auxiliary transmission speed. In production, most of the time, two people adjust different parts at the same time. In some cases, the two are still incompatible with each other or their thoughts are neglected. One person is still changing gears and the other starts the machine tool, causing personal and machine accidents. In order to safe production, to avoid accidents, shorten the production of auxiliary