卷筒聯軸器是一種新型撓性(xing)聯(lian)(lian)軸器(qi)(qi)，主要用(yong)(yong)于起(qi)重(zhong)(zhong)設備(bei)(bei)中起(qi)升(sheng)機構的(de)(de)減速(su)器(qi)(qi)輸出軸與鋼絲(si)繩卷筒的(de)(de)聯(lian)(lian)接，也適用(yong)(yong)于其它類似的(de)(de)既(ji)傳遞轉(zhuan)矩又(you)承(cheng)受徑向(xiang)(xiang)載(zai)(zai)荷的(de)(de)機械設備(bei)(bei)，但(dan)不(bu)能用(yong)(yong)作需(xu)承(cheng)受軸向(xiang)(xiang)載(zai)(zai)荷的(de)(de)傳動。卷筒工作時產生(sheng)的(de)(de)附加軸向(xiang)(xiang)載(zai)(zai)荷必須由卷筒固定(ding)(ding)支承(cheng)座承(cheng)受，因此，聯(lian)(lian)軸器(qi)(qi)安裝時必須保證軸向(xiang)(xiang)定(ding)(ding)位(wei)正確。否則(ze)卷筒工作時產生(sheng)的(de)(de)彈性(xing)水平(ping)位(wei)移可能會破壞聯(lian)(lian)軸器(qi)(qi)的(de)(de)軸向(xiang)(xiang)限位(wei)，造成(cheng)聯(lian)(lian)接失效，甚至釀成(cheng)嚴重(zhong)(zhong)事故。

卷筒聯軸器由帶鼓形齒(chi)(chi)的外(wai)(wai)(wai)齒(chi)(chi)軸套(tao)(tao)、帶聯(lian)接法蘭和內齒(chi)(chi)圈的外(wai)(wai)(wai)套(tao)(tao)、帶外(wai)(wai)(wai)球面(mian)的承載環、端蓋(gai)和密(mi)封圈等組成，并設有定位磨損指針、潤(run)滑(hua)油孔和通氣孔等。外(wai)(wai)(wai)齒(chi)(chi)軸套(tao)(tao)和外(wai)(wai)(wai)套(tao)(tao)構成的鼓形齒(chi)(chi)式(shi)聯(lian)軸器傳(chuan)遞驅動功率(lv), 而由承載環的外(wai)(wai)(wai)球面(mian)和外(wai)(wai)(wai)套(tao)(tao)的內承載面(mian)形成的接觸副構成自動調(diao)位的球面(mian)軸承，承受徑向載荷。卷筒用聯(lian)軸器的內、外(wai)(wai)(wai)齒(chi)(chi)嚙合在油浴中(zhong)工作,通過內外(wai)(wai)(wai)端蓋(gai)、密(mi)封圈防(fang)止(zhi)潤(run)滑(hua)脂泄漏(lou)。