卷筒聯軸器是一種新型撓(nao)性(xing)聯(lian)軸(zhou)(zhou)器(qi)，主要用(yong)(yong)于起(qi)(qi)重設(she)備中起(qi)(qi)升機構的(de)減速器(qi)輸出軸(zhou)(zhou)與鋼絲(si)繩卷(juan)筒(tong)的(de)聯(lian)接，也(ye)適用(yong)(yong)于其它(ta)類似(si)的(de)既傳遞轉矩又(you)承(cheng)受徑向(xiang)(xiang)載(zai)荷(he)的(de)機械(xie)設(she)備，但不能(neng)用(yong)(yong)作需承(cheng)受軸(zhou)(zhou)向(xiang)(xiang)載(zai)荷(he)的(de)傳動。卷(juan)筒(tong)工(gong)作時(shi)產生的(de)附加軸(zhou)(zhou)向(xiang)(xiang)載(zai)荷(he)必須由卷(juan)筒(tong)固定支(zhi)承(cheng)座承(cheng)受，因(yin)此，聯(lian)軸(zhou)(zhou)器(qi)安裝時(shi)必須保證軸(zhou)(zhou)向(xiang)(xiang)定位(wei)正確。否則卷(juan)筒(tong)工(gong)作時(shi)產生的(de)彈性(xing)水平位(wei)移可能(neng)會破壞聯(lian)軸(zhou)(zhou)器(qi)的(de)軸(zhou)(zhou)向(xiang)(xiang)限(xian)位(wei)，造成(cheng)聯(lian)接失效(xiao)，甚至(zhi)釀成(cheng)嚴重事(shi)故。

卷筒聯軸器由帶鼓形齒(chi)的外(wai)(wai)齒(chi)軸(zhou)(zhou)套、帶聯(lian)(lian)接法(fa)蘭和(he)內(nei)齒(chi)圈(quan)(quan)(quan)的外(wai)(wai)套、帶外(wai)(wai)球(qiu)面(mian)的承(cheng)載環、端蓋和(he)密(mi)封(feng)圈(quan)(quan)(quan)等(deng)組(zu)成(cheng)，并設(she)有(you)定(ding)位磨損指針、潤(run)滑(hua)油孔(kong)和(he)通氣孔(kong)等(deng)。外(wai)(wai)齒(chi)軸(zhou)(zhou)套和(he)外(wai)(wai)套構(gou)成(cheng)的鼓形齒(chi)式聯(lian)(lian)軸(zhou)(zhou)器傳遞驅動功(gong)率(lv), 而由承(cheng)載環的外(wai)(wai)球(qiu)面(mian)和(he)外(wai)(wai)套的內(nei)承(cheng)載面(mian)形成(cheng)的接觸副構(gou)成(cheng)自動調位的球(qiu)面(mian)軸(zhou)(zhou)承(cheng)，承(cheng)受徑向載荷。卷筒用聯(lian)(lian)軸(zhou)(zhou)器的內(nei)、外(wai)(wai)齒(chi)嚙合在油浴中工(gong)作(zuo),通過內(nei)外(wai)(wai)端蓋、密(mi)封(feng)圈(quan)(quan)(quan)防(fang)止潤(run)滑(hua)脂泄(xie)漏。