直齒(chi)(chi)輪傳(chuan)(chuan)動(dong)(dong)依靠主動(dong)(dong)齒(chi)(chi)輪和(he)從動(dong)(dong)齒(chi)(chi)輪的(de)嚙(nie)合來傳(chuan)(chuan)遞運(yun)動(dong)(dong)和(he)動(dong)(dong)力(li)。這是(shi)(shi)一個(ge)在兩個(ge)平行軸之(zhi)間驅(qu)動(dong)(dong)的(de)齒(chi)(chi)輪。直圓(yuan)柱(zhu)齒(chi)(chi)輪易于加工，能生產(chan)高(gao)精度(du)齒(chi)(chi)輪，在傳(chuan)(chuan)動(dong)(dong)中(zhong)不產(chan)生推力(li)(軸向力(li))，是(shi)(shi)實(shi)際生產(chan)和(he)使用中(zhong)最常見(jian)的(de)齒(chi)(chi)輪之(zhi)一。

齒輪傳動(dong)具(ju)有(you)運(yun)行(xing)可靠、傳動(dong)比(bi)恒定(ding)、效率(lv)高、能在空間任意(yi)兩(liang)軸間傳遞運(yun)動(dong)、適應性(xing)廣(guang)的優點。