直(zhi)齒輪(lun)傳(chuan)動(dong)(dong)(dong)(dong)依靠主動(dong)(dong)(dong)(dong)齒輪(lun)和從動(dong)(dong)(dong)(dong)齒輪(lun)的(de)嚙(nie)合來傳(chuan)遞運(yun)動(dong)(dong)(dong)(dong)和動(dong)(dong)(dong)(dong)力。這是(shi)一(yi)個(ge)在(zai)兩個(ge)平行軸之間驅動(dong)(dong)(dong)(dong)的(de)齒輪(lun)。直(zhi)圓(yuan)柱齒輪(lun)易于加工，能(neng)生產(chan)高精度齒輪(lun)，在(zai)傳(chuan)動(dong)(dong)(dong)(dong)中不產(chan)生推(tui)力(軸向力)，是(shi)實際生產(chan)和使(shi)用中最常(chang)見的(de)齒輪(lun)之一(yi)。

齒輪傳動(dong)具有運行可靠(kao)、傳動(dong)比恒定(ding)、效率(lv)高、能在空間(jian)任意兩軸間(jian)傳遞運動(dong)、適應性廣的優點。