一、電動推桿是干什么用的

電動推桿又名直(zhi)線(xian)驅動器，主要(yao)是(shi)由(you)電機(ji)(ji)推桿(gan)和(he)控制(zhi)裝置(zhi)等機(ji)(ji)構組(zu)成的一種新型直(zhi)線(xian)執行機(ji)(ji)構，可以認為是(shi)旋轉(zhuan)電機(ji)(ji)在結構方面的一種延伸。

電動推桿是一種將電動機的旋轉運動轉變為推桿的直線往復運動的電力驅動裝置。可用于各種簡單或復雜的工藝流程中做為執行機械使用，以實現遠距離控制、集中控制或自動控制。多用(yong)于家用(yong)電器(qi)(qi)、廚具、醫療器(qi)(qi)械、汽車等行業的運動驅動單元(yuan)。

二、電動推桿結構

電動(dong)推桿由驅動(dong)電機、減(jian)速(su)齒(chi)輪(lun)、螺桿、螺母(mu)、導套(tao)、推桿、滑座(zuo)、彈簧、外殼及渦輪(lun)、微(wei)動(dong)控制開(kai)關等組成。

電(dian)動(dong)(dong)推(tui)(tui)桿(gan)(gan)是一(yi)(yi)種新型的(de)(de)電(dian)動(dong)(dong)執行機(ji)構，電(dian)動(dong)(dong)推(tui)(tui)桿(gan)(gan)主要由電(dian)機(ji)、推(tui)(tui)桿(gan)(gan)和控制裝(zhuang)置等機(ji)構組成的(de)(de)一(yi)(yi)種新型直(zhi)線執行機(ji)構，可以實現遠距離(li)控制、集中控制。電(dian)動(dong)(dong)推(tui)(tui)桿(gan)(gan)在(zai)一(yi)(yi)定范圍行程(cheng)內作往(wang)返運動(dong)(dong)，一(yi)(yi)般電(dian)動(dong)(dong)推(tui)(tui)桿(gan)(gan)標準行程(cheng)在(zai)，100，150，200，250，300，350，400mm，特殊行程(cheng)也可根據(ju)不同應(ying)用條件要求設計定做。

電(dian)(dian)動(dong)(dong)(dong)(dong)(dong)推桿(gan)(gan)(gan)可(ke)(ke)以根據(ju)不同的(de)(de)應用(yong)(yong)(yong)負荷而設(she)計(ji)不同推力(li)的(de)(de)電(dian)(dian)動(dong)(dong)(dong)(dong)(dong)推桿(gan)(gan)(gan)，一(yi)般其最(zui)大(da)推力(li)可(ke)(ke)達6000N，空(kong)載(zai)運行(xing)(xing)速度(du)為4mm~35mm/s，電(dian)(dian)動(dong)(dong)(dong)(dong)(dong)推桿(gan)(gan)(gan)以24V/12V直流永磁(ci)電(dian)(dian)機(ji)(ji)(ji)(ji)(ji)為動(dong)(dong)(dong)(dong)(dong)力(li)源(yuan)，把電(dian)(dian)機(ji)(ji)(ji)(ji)(ji)的(de)(de)旋轉(zhuan)(zhuan)運動(dong)(dong)(dong)(dong)(dong)轉(zhuan)(zhuan)化為直線往復運動(dong)(dong)(dong)(dong)(dong)。推動(dong)(dong)(dong)(dong)(dong)一(yi)組(zu)連桿(gan)(gan)(gan)機(ji)(ji)(ji)(ji)(ji)構(gou)來(lai)(lai)完成風(feng)(feng)門(men)、閥(fa)門(men)、閘門(men)、擋板等切換工作。采(cai)用(yong)(yong)(yong)電(dian)(dian)動(dong)(dong)(dong)(dong)(dong)推桿(gan)(gan)(gan)作為執(zhi)(zhi)行(xing)(xing)機(ji)(ji)(ji)(ji)(ji)構(gou)不僅可(ke)(ke)減(jian)少采(cai)用(yong)(yong)(yong)氣(qi)動(dong)(dong)(dong)(dong)(dong)執(zhi)(zhi)行(xing)(xing)機(ji)(ji)(ji)(ji)(ji)構(gou)所(suo)需(xu)(xu)的(de)(de)氣(qi)源(yuan)裝(zhuang)(zhuang)置(zhi)和輔助設(she)備，也可(ke)(ke)減(jian)少執(zhi)(zhi)行(xing)(xing)機(ji)(ji)(ji)(ji)(ji)構(gou)的(de)(de)重量(liang)。氣(qi)動(dong)(dong)(dong)(dong)(dong)執(zhi)(zhi)行(xing)(xing)機(ji)(ji)(ji)(ji)(ji)構(gou)在(zai)整個控(kong)制(zhi)運行(xing)(xing)過(guo)程中都需(xu)(xu)要有一(yi)定的(de)(de)氣(qi)壓(ya)，雖然可(ke)(ke)采(cai)用(yong)(yong)(yong)消耗量(liang)小的(de)(de)放大(da)器(qi)等，但日積月累，耗氣(qi)量(liang)仍是(shi)巨大(da)的(de)(de)。采(cai)用(yong)(yong)(yong)電(dian)(dian)動(dong)(dong)(dong)(dong)(dong)推桿(gan)(gan)(gan)執(zhi)(zhi)行(xing)(xing)機(ji)(ji)(ji)(ji)(ji)構(gou)，在(zai)改變控(kong)制(zhi)開度(du)時(shi)(shi)，需(xu)(xu)要供電(dian)(dian)，在(zai)達到所(suo)需(xu)(xu)開度(du)時(shi)(shi)就可(ke)(ke)不再供電(dian)(dian)，因此從(cong)節能(neng)看，電(dian)(dian)動(dong)(dong)(dong)(dong)(dong)推桿(gan)(gan)(gan)執(zhi)(zhi)行(xing)(xing)機(ji)(ji)(ji)(ji)(ji)構(gou)比氣(qi)動(dong)(dong)(dong)(dong)(dong)執(zhi)(zhi)行(xing)(xing)機(ji)(ji)(ji)(ji)(ji)構(gou)有明(ming)顯節能(neng)優點。適(shi)用(yong)(yong)(yong)于遠距離操(cao)縱而廣泛(fan)用(yong)(yong)(yong)于電(dian)(dian)力(li)、化工、冶金、礦山(shan)、輕(qing)工、交通、船舶等部門(men)的(de)(de)風(feng)(feng)門(men)、閥(fa)門(men)、閘門(men)等機(ji)(ji)(ji)(ji)(ji)構(gou)的(de)(de)啟閉、物料裝(zhuang)(zhuang)卸(xie)、流量(liang)控(kong)制(zhi)等。現已被越來(lai)(lai)越多的(de)(de)部門(men)用(yong)(yong)(yong)它來(lai)(lai)代替(ti)機(ji)(ji)(ji)(ji)(ji)構(gou)手、液壓(ya)閥(fa)、減(jian)速傳動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)構(gou)的(de)(de)自(zi)動(dong)(dong)(dong)(dong)(dong)裝(zhuang)(zhuang)置(zhi)。

三、電動推桿工作原理

電動(dong)(dong)機經齒輪或(huo)蝸(gua)輪蝸(gua)桿減(jian)速后，帶動(dong)(dong)一(yi)對絲桿螺母。把電機的旋(xuan)轉(zhuan)運動(dong)(dong)變成直線運動(dong)(dong)，利用電動(dong)(dong)機正反轉(zhuan)完成推桿動(dong)(dong)作。如通(tong)過(guo)各種杠(gang)桿、搖桿或(huo)連(lian)桿等機構(gou)可完成轉(zhuan)動(dong)(dong)、搖動(dong)(dong)等復(fu)雜動(dong)(dong)作。通(tong)過(guo)改(gai)變杠(gang)桿力臂(bei)長(chang)度(du)，可以增大(da)或(huo)減(jian)小(xiao)行程。

行程控制裝置：

1、蝸輪(lun)蝸桿傳動形式：電(dian)機(ji)齒輪(lun)上的蝸桿帶動蝸輪(lun)轉(zhuan)動，使蝸輪(lun)內的小絲桿作軸向移動，由(you)連接板帶動限(xian)位桿相應(ying)作軸向移動，至所需(xu)行程(cheng)時，通過調(diao)節限(xian)位塊壓下(xia)行程(cheng)開關斷電(dian)，電(dian)動機(ji)停止運(yun)轉(zhuan)（正反控制相同）。

2、齒(chi)輪(lun)傳動(dong)(dong)形式：電機(ji)通過減(jian)速齒(chi)輪(lun)后帶動(dong)(dong)安(an)裝(zhuang)于內(nei)管的小絲(si)桿，帶動(dong)(dong)與(yu)之連接一起的做(zuo)軸向運行螺母，至所(suo)設(she)定的行程時螺母觸角壓住限位開(kai)(kai)關斷開(kai)(kai)電源，電機(ji)停止(zhi)運動(dong)(dong)（反向與(yu)之相(xiang)同）。

可選配(pei)電(dian)位器(qi)，用以顯示推桿運行的行程(cheng)(cheng)狀態，還(huan)可加配(pei)編碼器(qi)，來實(shi)現(xian)分幾步走完(wan)整個行程(cheng)(cheng)（即走走停(ting)停(ting)）。