在机床或机械设备上,移动部件总是在固定部件上运动,进行各种简单的或复杂的自动工作循环。在一般情况下,移动部件上各种机构的运动是由机械、电气、液压、气动或电液联合驱动和控制的,不论采取哪种驱动和控制方法,移动部件运动时往往拖着电气管线、气动管道或液压管道等动力管线一起运动。这些管线或管道大多数是软管,也可以是活动的金属硬管或其它形式。如果移动部件的行程较短,那 On machine tools or machinery, moving parts are always moving on fixed parts for a variety of simple or complex automatic work cycles. In general, the movements of various mechanisms on moving parts are driven and controlled mechanically, electrically, hydraulically, pneumatically or hydraulically. Whatever driving and controlling method is adopted, the moving parts often drag electrical lines during their movement, Pneumatic pipe or hydraulic pipe and other power lines move together. Most of these lines or pipes are hoses, it can be moving metal pipe or other forms. If the moving parts have a short stroke, then