斷火限(xian)(xian)(xian)位(wei)開(kai)關又稱行(xing)程限(xian)(xian)(xian)位(wei)開(kai)關，用(yong)于(yu)控制(zhi)機械設備(bei)的(de)(de)(de)行(xing)程及限(xian)(xian)(xian)位(wei)保(bao)(bao)護(hu)。在實際生產中，將行(xing)程限(xian)(xian)(xian)位(wei)開(kai)關安裝(zhuang)在預(yu)先(xian)安排的(de)(de)(de)位(wei)置(zhi)，當裝(zhuang)于(yu)生產機械運(yun)動部件上的(de)(de)(de)模塊撞(zhuang)擊行(xing)程開(kai)關時，行(xing)程限(xian)(xian)(xian)位(wei)開(kai)關的(de)(de)(de)觸點動作(zuo)，實現電路(lu)的(de)(de)(de)切(qie)換。因此(ci)，斷火限(xian)(xian)(xian)位(wei)開(kai)關是一種根(gen)據運(yun)動部件的(de)(de)(de)行(xing)程位(wei)置(zhi)而切(qie)換電路(lu)的(de)(de)(de)電器，它的(de)(de)(de)作(zuo)用(yong)原理與按(an)鈕類似。限(xian)(xian)(xian)位(wei)開(kai)關廣泛(fan)用(yong)于(yu)各類機床和起(qi)重機械，用(yong)以控制(zhi)其行(xing)程、進行(xing)終端限(xian)(xian)(xian)位(wei)保(bao)(bao)護(hu)。在電梯的(de)(de)(de)控制(zhi)電路(lu)中，還利用(yong)行(xing)程限(xian)(xian)(xian)位(wei)開(kai)關來控制(zhi)開(kai)關轎門的(de)(de)(de)速度(du)、自動開(kai)關門的(de)(de)(de)限(xian)(xian)(xian)位(wei)，腳踏開(kai)關哪家好，轎廂(xiang)的(de)(de)(de)上、下限(xian)(xian)(xian)位(wei)保(bao)(bao)護(hu)。

明泰(tai)電(dian)(dian)氣（蘇州）有限公(gong)司是正泰(tai)集團在(zai)蘇州地(di)區一家授權的經銷企業，江蘇腳踏(ta)開關，連續十年銷量居正泰(tai)營銷網絡名，公(gong)司主要經營“正泰(tai)”牌配(pei)電(dian)(dian)電(dian)(dian)器(qi)、控(kong)制電(dian)(dian)器(qi)、終端電(dian)(dian)器(qi)、電(dian)(dian)源電(dian)(dian)器(qi)、電(dian)(dian)力電(dian)(dian)子(zi)、儀(yi)(yi)器(qi)儀(yi)(yi)表、建筑電(dian)(dian)器(qi)、高壓電(dian)(dian)器(qi)及成套設備(bei)。

限(xian)(xian)(xian)(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)(kai)關(guan)(guan)分工作(zuo)限(xian)(xian)(xian)(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)(kai)關(guan)(guan)和極限(xian)(xian)(xian)(xian)限(xian)(xian)(xian)(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)(kai)關(guan)(guan)，工作(zuo)限(xian)(xian)(xian)(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)(kai)關(guan)(guan)是用來給(gei)出(chu)機構(gou)動(dong)作(zuo)到位(wei)(wei)(wei)信號(hao)的。極限(xian)(xian)(xian)(xian)限(xian)(xian)(xian)(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)(kai)關(guan)(guan)是防(fang)止機構(gou)動(dong)作(zuo)超出(chu)設計(ji)范圍而(er)發生事故的。工作(zuo)限(xian)(xian)(xian)(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)(kai)關(guan)(guan)安裝在(zai)機構(gou)需要改變工況(kuang)的位(wei)(wei)(wei)置，開(kai)(kai)(kai)(kai)關(guan)(guan)動(dong)作(zuo)后，給(gei)出(chu)信號(hao)，進行別(bie)的相(xiang)關(guan)(guan)動(dong)作(zuo)。極限(xian)(xian)(xian)(xian)限(xian)(xian)(xian)(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)(kai)關(guan)(guan)安裝在(zai)機構(gou)動(dong)作(zuo)的遠端，用來保(bao)護機構(gou)動(dong)作(zuo)過大出(chu)現機構(gou)損壞。

行程開關(guan)主要用(yong)(yong)于將機(ji)械(xie)位移(yi)轉變成電信號，使電動(dong)機(ji)的(de)運行狀態得以改變，從(cong)而控制機(ji)械(xie)動(dong)作或用(yong)(yong)作程序控制。

行程開(kai)關(guan)真正(zheng)的用武之地是在(zai)工業上，腳(jiao)踏開(kai)關(guan)供(gong)應，在(zai)那(nei)里它與其它設備配合(he)，腳(jiao)踏開(kai)關(guan)廠家，組成(cheng)更復雜的自動化設備。

限位開關，指為保護內置微動開關免受外力、水、油、氣體和塵埃等的損害，而組裝在外殼內的開關，尤其適用于對機械強度和環境適應 性有特殊要求的地方。　形狀大致分為橫向型、豎向型和復合型。下圖表示典型的豎向型限位開關的構造。限位開關大致上是由五個構成要素組成的。

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