根據帶式(shi)輸送機(ji)的(de)某(mou)些特殊場(chang)合需(xu)要，又出現了介(jie)于分離式(shi)驅動(dong)和電動(dong)滾筒(tong)驅動(dong)形式(shi)之間(jian)的(de)減(jian)速(su)裝置在滾筒(tong)體內部、電動(dong)機(ji)在滾筒(tong)體外面的(de)外裝式(shi)電動(dong)滾筒(tong)。
　　與分離式驅(qu)動(dong)(dong)裝置相比，電動(dong)(dong)滾筒具有結構緊湊(cou)、傳動(dong)(dong)效(xiao)率高、噪(zao)聲低、使用壽命長，運轉平穩、工(gong)(gong)作可靠、密封性好、占據空間小、安裝方便等諸(zhu)多優點(dian)，并(bing)且適合在(zai)各(ge)種惡(e)劣環(huan)境條件下工(gong)(gong)作。包括潮(chao)濕、泥濘、粉(fen)塵多的(de)工(gong)(gong)作環(huan)境。

分類
　　電(dian)動(dong)滾(gun)筒的分類(lei)有四(si)種基本方(fang)法。即依據(ju)電(dian)動(dong)機冷(leng)卻方(fang)式，所采用減速(su)器傳動(dong)結構類(lei)型(xing)，電(dian)動(dong)滾(gun)筒基本工(gong)作環境特征和電(dian)機置(zhi)于(yu)滾(gun)筒內外這幾種方(fang)法來將電(dian)動(dong)滾(gun)筒分類(lei)。

冷卻方式
　　風冷式電動(dong)滾筒
　　這種(zhong)電動滾筒的(de)(de)特(te)點是電動機不用油液冷(leng)卻(que)，靠傳(chuan)導(dao)、輻(fu)射和(he)風的(de)(de)對(dui)流，又可(ke)分為強制風冷(leng)和(he)自然風冷(leng)兩種(zhong)。

油(you)冷式(shi)電動滾筒
　　這種(zhong)電(dian)(dian)動(dong)(dong)滾(gun)(gun)筒(tong)(tong)(tong)也稱為間接油(you)冷(leng)式(shi)電(dian)(dian)動(dong)(dong)滾(gun)(gun)筒(tong)(tong)(tong)。電(dian)(dian)動(dong)(dong)滾(gun)(gun)筒(tong)(tong)(tong)內有一定(ding)的(de)冷(leng)卻(que)油(you)液(ye)，由于(yu)滾(gun)(gun)筒(tong)(tong)(tong)體(ti)(ti)(ti)不(bu)(bu)停地旋轉，筒(tong)(tong)(tong)體(ti)(ti)(ti)上刮油(you)板將(jiang)油(you)液(ye)不(bu)(bu)停地澆到電(dian)(dian)動(dong)(dong)機(ji)和齒(chi)輪(lun)(lun)上，帶(dai)走(zou)電(dian)(dian)動(dong)(dong)機(ji)和齒(chi)輪(lun)(lun)工作時產生(sheng)的(de)熱(re)量，把熱(re)量傳遞到滾(gun)(gun)筒(tong)(tong)(tong)體(ti)(ti)(ti)壁上，加速電(dian)(dian)機(ji)散熱(re)，并對齒(chi)輪(lun)(lun)產生(sheng)潤滑作用。油(you)冷(leng)式(shi)電(dian)(dian)動(dong)(dong)滾(gun)(gun)筒(tong)(tong)(tong)的(de)關(guan)鍵是(shi)電(dian)(dian)動(dong)(dong)機(ji)內部不(bu)(bu)允許進入(ru)油(you)液(ye)
。
油浸式電動滾筒
　　油(you)浸式(shi)電(dian)動(dong)(dong)滾(gun)(gun)筒(tong)也(ye)叫直(zhi)接油(you)冷式(shi)電(dian)動(dong)(dong)滾(gun)(gun)筒(tong)，這類(lei)型的(de)電(dian)動(dong)(dong)滾(gun)(gun)筒(tong)允許油(you)液(ye)進(jin)入(ru)電(dian)動(dong)(dong)機(ji)內部，直(zhi)接與電(dian)動(dong)(dong)機(ji)轉子和定子繞組接觸，將它們工作時產生的(de)熱量(liang)靠滾(gun)(gun)筒(tong)體不斷地(di)旋轉而(er)傳遞到(dao)滾(gun)(gun)筒(tong)體內壁。這種結構的(de)散熱效(xiao)果(guo)較好，但對潤(run)滑油(you)和電(dian)動(dong)(dong)機(ji)的(de)質量(liang)相(xiang)對要(yao)求也(ye)較高。
傳動結(jie)構
　　國內外生(sheng)(sheng)產(chan)的減速器類型(xing)不(bu)少，但用在電(dian)動(dong)滾筒上能批量(liang)生(sheng)(sheng)產(chan)的不(bu)外乎三種類型(xing)。
定軸齒輪傳動的電動滾筒
　　國內外(wai)電動滾筒最常用(yong)的減(jian)速(su)器(qi)裝(zhuang)(zhuang)置就是定軸齒(chi)輪傳(chuan)動，而齒(chi)輪傳(chuan)動中95%以上是定軸漸開線圓柱(zhu)齒(chi)輪傳(chuan)動結構。這種傳(chuan)動桔構簡(jian)單(dan)、性能(neng)可靠(kao)、制(zhi)造容易、安裝(zhuang)(zhuang)維修方便(bian)，同時又具有效率(lv)高、噪音低的優點。常用(yong)兩級減(jian)速(su)，少數為三級減(jian)速(su)。

行量齒輪傳動的電動滾筒
這(zhe)種傳動(dong)形式與定軸齒(chi)輪傳動(dong)比較，具(ju)有體積小、重(zhong)量輕、承載能力大、工作平穩(wen)等優(you)點，但維(wei)修不方便(bian)，在國外的電動(dong)滾筒中常見這(zhe)種結構型(xing)式。
擺線針(zhen)輪傳動(dong)的電動(dong)滾筒
這(zhe)(zhe)種結(jie)(jie)構(gou)型式可謂(wei)“中國特色”，除日本外(wai)，其它國家很(hen)少使用(yong)這(zhe)(zhe)種傳動(dong)結(jie)(jie)構(gou)，用(yong)擺(bai)線(xian)針輪(lun)這(zhe)(zhe)種傳動(dong)結(jie)(jie)構(gou)的電動(dong)滾筒可實現(xian)很(hen)小的線(xian)速度和很(hen)大功率。