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伸縮式齒(chi)(chi)(chi)(chi)式聯(lian)軸(zhou)器(qi)(qi)(qi)是由齒(chi)(chi)(chi)(chi)數相同(tong)的內齒(chi)(chi)(chi)(chi)圈和(he)帶外齒(chi)(chi)(chi)(chi)的凸緣半聯(lian)軸(zhou)器(qi)(qi)(qi)等零(ling)件(jian)組成(cheng)。外齒(chi)(chi)(chi)(chi)分為(wei)直齒(chi)(chi)(chi)(chi)和(he)鼓形(xing)齒(chi)(chi)(chi)(chi)兩種齒(chi)(chi)(chi)(chi)形(xing)，所謂鼓形(xing)齒(chi)(chi)(chi)(chi)即為(wei)將外齒(chi)(chi)(chi)(chi)制成(cheng)球面，球面中(zhong)心在齒(chi)(chi)(chi)(chi)輪(lun)軸(zhou)線(xian)上，齒(chi)(chi)(chi)(chi)側間隙較(jiao)一般(ban)齒(chi)(chi)(chi)(chi)輪(lun)大，鼓形(xing)齒(chi)(chi)(chi)(chi)聯(lian)軸(zhou)器(qi)(qi)(qi)可允許較(jiao)大的角位移(相對于直齒(chi)(chi)(chi)(chi)聯(lian)軸(zhou)器(qi)(qi)(qi))，可改善(shan)齒(chi)(chi)(chi)(chi)的接觸條件(jian)，提(ti)高傳(chuan)遞轉(zhuan)矩的能力，延長使用壽命。

伸縮式齒(chi)(chi)式聯(lian)軸(zhou)器(qi)(qi)在(zai)工作時，兩軸(zhou)產生相對位移(yi)，內(nei)外齒(chi)(chi)的齒(chi)(chi)面周期(qi)性作軸(zhou)向相對滑(hua)動，必然形(xing)成齒(chi)(chi)面磨損和功(gong)率(lv)損耗，因(yin)此齒(chi)(chi)式聯(lian)軸(zhou)器(qi)(qi)需(xu)在(zai)良好潤滑(hua)和密封的狀(zhuang)態(tai)下(xia)工作。

伸縮式齒(chi)式聯(lian)軸(zhou)(zhou)器(qi)(qi)(qi)徑(jing)向(xiang)尺寸小，承載能力(li)大，常用于低速重(zhong)載工(gong)況(kuang)條件的(de)軸(zhou)(zhou)系傳(chuan)動(dong)，如(ru)冶金、礦(kuang)山(shan)、起(qi)重(zhong)運輸行(xing)業，也適用于石(shi)油(you)、化工(gong)、通用機械(xie)等行(xing)業。高(gao)精度并經動(dong)平衡(heng)的(de)齒(chi)式聯(lian)軸(zhou)(zhou)器(qi)(qi)(qi)可用于高(gao)速傳(chuan)動(dong)，如(ru)燃汽輪機的(de)軸(zhou)(zhou)系傳(chuan)動(dong)。由于鼓形齒(chi)式聯(lian)軸(zhou)(zhou)器(qi)(qi)(qi)的(de)角向(xiang)補償大于直齒(chi)式聯(lian)軸(zhou)(zhou)器(qi)(qi)(qi)，國(guo)內(nei)外均廣泛采用鼓形齒(chi)式聯(lian)軸(zhou)(zhou)器(qi)(qi)(qi)。