机械变速机构主要有两种方式:增速机构和减速机构。凡是终端要求的转数比电动机的转数高的,就采用增速机构,反过来就用减速机构。在某些通用的机床上,为了获得多种不同的终端速度,就把增速机构和减速机构合并起来,组成一个多级变速的作动机构。一、增速机构增速机构的特点是速度逐步增高。使用这种机构的地方如砂轮机、磨床、高速钻床、细纱机、合线机等等。绝大多数的增速机构是以提高转数为主的,所以传动的马力不很大。在这类机构里,主要考虑的是:平衡问题; There are two main mechanical transmission mechanism: growth mechanism and deceleration mechanism. Where the terminal requires the number of revolutions higher than the motor speed, the use of growth agencies, in turn, use the deceleration mechanism. In some general-purpose machine tools, in order to obtain a variety of different terminal speed, put the speed increase mechanism and the deceleration mechanism combined to form a multi-speed transmission actuation mechanism. First, the growth rate of institutional growth agencies is characterized by the gradual increase in speed. Where this mechanism is used, grinders, grinders, high-speed drilling machines, spinning frames, wire bonders, etc. The vast majority of growth agencies to improve the number of revolutions, so the horsepower is not very large. In such agencies, the main considerations are: the issue of balance;