一、電動推桿是干什么用的

電動推桿又(you)名直線驅動(dong)器，主(zhu)要是(shi)由電機(ji)(ji)推(tui)桿和控制裝置等機(ji)(ji)構(gou)組成的一種新型直線執行機(ji)(ji)構(gou)，可以(yi)認為(wei)是(shi)旋轉電機(ji)(ji)在(zai)結(jie)構(gou)方(fang)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(yu)家用(yong)電器、廚具、醫(yi)療器械、汽車等行業的(de)運(yun)動驅動單元。

二、電動推桿結構

電動推桿由(you)驅動電機、減速齒輪、螺(luo)桿、螺(luo)母、導套、推桿、滑座、彈(dan)簧、外殼及渦輪、微動控制(zhi)開關等(deng)組成。

電動(dong)推(tui)桿(gan)(gan)是(shi)一(yi)種新型(xing)的電動(dong)執行機(ji)構(gou)(gou)，電動(dong)推(tui)桿(gan)(gan)主要由電機(ji)、推(tui)桿(gan)(gan)和控制裝置等(deng)機(ji)構(gou)(gou)組成的一(yi)種新型(xing)直線執行機(ji)構(gou)(gou)，可以(yi)實現(xian)遠距離控制、集中控制。電動(dong)推(tui)桿(gan)(gan)在一(yi)定范圍行程內(nei)作(zuo)往返運動(dong)，一(yi)般電動(dong)推(tui)桿(gan)(gan)標準行程在，100，150，200，250，300，350，400mm，特(te)殊行程也可根據不同應用條件要求設計(ji)定做。

電(dian)(dian)動(dong)(dong)(dong)(dong)(dong)(dong)推(tui)桿可以根據不(bu)(bu)同的(de)應用(yong)(yong)(yong)負荷而設計不(bu)(bu)同推(tui)力的(de)電(dian)(dian)動(dong)(dong)(dong)(dong)(dong)(dong)推(tui)桿，一(yi)般其最大(da)推(tui)力可達(da)(da)6000N，空載運行(xing)速度(du)為(wei)4mm~35mm/s，電(dian)(dian)動(dong)(dong)(dong)(dong)(dong)(dong)推(tui)桿以24V/12V直流永磁電(dian)(dian)機(ji)為(wei)動(dong)(dong)(dong)(dong)(dong)(dong)力源(yuan)，把電(dian)(dian)機(ji)的(de)旋(xuan)轉運動(dong)(dong)(dong)(dong)(dong)(dong)轉化為(wei)直線往復運動(dong)(dong)(dong)(dong)(dong)(dong)。推(tui)動(dong)(dong)(dong)(dong)(dong)(dong)一(yi)組(zu)連桿機(ji)構(gou)(gou)(gou)來完(wan)成風門(men)(men)、閥門(men)(men)、閘門(men)(men)、擋(dang)板等(deng)切換(huan)工作。采(cai)(cai)用(yong)(yong)(yong)電(dian)(dian)動(dong)(dong)(dong)(dong)(dong)(dong)推(tui)桿作為(wei)執(zhi)(zhi)行(xing)機(ji)構(gou)(gou)(gou)不(bu)(bu)僅可減少采(cai)(cai)用(yong)(yong)(yong)氣(qi)動(dong)(dong)(dong)(dong)(dong)(dong)執(zhi)(zhi)行(xing)機(ji)構(gou)(gou)(gou)所需的(de)氣(qi)源(yuan)裝置和(he)輔助設備，也可減少執(zhi)(zhi)行(xing)機(ji)構(gou)(gou)(gou)的(de)重量。氣(qi)動(dong)(dong)(dong)(dong)(dong)(dong)執(zhi)(zhi)行(xing)機(ji)構(gou)(gou)(gou)在(zai)整個控制(zhi)(zhi)運行(xing)過程中(zhong)都需要(yao)有(you)一(yi)定(ding)的(de)氣(qi)壓(ya)，雖然可采(cai)(cai)用(yong)(yong)(yong)消耗(hao)量小的(de)放大(da)器等(deng)，但日積月累，耗(hao)氣(qi)量仍是巨大(da)的(de)。采(cai)(cai)用(yong)(yong)(yong)電(dian)(dian)動(dong)(dong)(dong)(dong)(dong)(dong)推(tui)桿執(zhi)(zhi)行(xing)機(ji)構(gou)(gou)(gou)，在(zai)改(gai)變控制(zhi)(zhi)開度(du)時，需要(yao)供電(dian)(dian)，在(zai)達(da)(da)到所需開度(du)時就可不(bu)(bu)再(zai)供電(dian)(dian)，因此從節能看，電(dian)(dian)動(dong)(dong)(dong)(dong)(dong)(dong)推(tui)桿執(zhi)(zhi)行(xing)機(ji)構(gou)(gou)(gou)比(bi)氣(qi)動(dong)(dong)(dong)(dong)(dong)(dong)執(zhi)(zhi)行(xing)機(ji)構(gou)(gou)(gou)有(you)明顯節能優點。適用(yong)(yong)(yong)于(yu)(yu)遠距離操縱而廣(guang)泛用(yong)(yong)(yong)于(yu)(yu)電(dian)(dian)力、化工、冶金(jin)、礦(kuang)山、輕工、交通、船舶等(deng)部門(men)(men)的(de)風門(men)(men)、閥門(men)(men)、閘門(men)(men)等(deng)機(ji)構(gou)(gou)(gou)的(de)啟閉(bi)、物料裝卸、流量控制(zhi)(zhi)等(deng)。現已被越(yue)來越(yue)多的(de)部門(men)(men)用(yong)(yong)(yong)它來代替機(ji)構(gou)(gou)(gou)手、液壓(ya)閥、減速傳動(dong)(dong)(dong)(dong)(dong)(dong)機(ji)構(gou)(gou)(gou)的(de)自(zi)動(dong)(dong)(dong)(dong)(dong)(dong)裝置。

三、電動推桿工作原理

電動(dong)(dong)機經齒輪或蝸(gua)輪蝸(gua)桿(gan)(gan)減速后(hou)，帶動(dong)(dong)一對絲桿(gan)(gan)螺母。把電機的旋轉(zhuan)(zhuan)運(yun)動(dong)(dong)變成直線(xian)運(yun)動(dong)(dong)，利用電動(dong)(dong)機正反(fan)轉(zhuan)(zhuan)完成推桿(gan)(gan)動(dong)(dong)作(zuo)。如通(tong)過(guo)各種杠(gang)桿(gan)(gan)、搖桿(gan)(gan)或連桿(gan)(gan)等機構可(ke)完成轉(zhuan)(zhuan)動(dong)(dong)、搖動(dong)(dong)等復雜動(dong)(dong)作(zuo)。通(tong)過(guo)改變杠(gang)桿(gan)(gan)力臂(bei)長度，可(ke)以增(zeng)大或減小行(xing)程。

行程控制裝置：

1、蝸輪蝸桿傳動(dong)(dong)形(xing)式：電(dian)(dian)機齒輪上的蝸桿帶動(dong)(dong)蝸輪轉(zhuan)動(dong)(dong)，使蝸輪內的小絲桿作軸向移(yi)動(dong)(dong)，由(you)連接板帶動(dong)(dong)限(xian)位桿相應作軸向移(yi)動(dong)(dong)，至所需行(xing)程(cheng)時(shi)，通過調節限(xian)位塊壓下行(xing)程(cheng)開關斷(duan)電(dian)(dian)，電(dian)(dian)動(dong)(dong)機停止運轉(zhuan)（正反控制相同(tong)）。

2、齒(chi)輪(lun)傳動形式：電機通過減速齒(chi)輪(lun)后(hou)帶動安裝(zhuang)于內管的小(xiao)絲桿，帶動與之連接一起的做軸向運行螺母，至所設定的行程時螺母觸角壓住限(xian)位開關斷開電源，電機停止運動（反向與之相同）。

可(ke)選配電位(wei)器，用以顯示推桿運行的行程狀態(tai)，還可(ke)加配編碼(ma)器，來(lai)實現分(fen)幾步走(zou)完(wan)整個行程（即(ji)走(zou)走(zou)停(ting)停(ting)）。