齒條應用

齒(chi)(chi)(chi)(chi)(chi)條(tiao)(tiao)可看作一(yi)個齒(chi)(chi)(chi)(chi)(chi)數(shu)為(wei)無窮多的(de)(de)齒(chi)(chi)(chi)(chi)(chi)輪(lun)(lun)的(de)(de)一(yi)部分，這時齒(chi)(chi)(chi)(chi)(chi)輪(lun)(lun)的(de)(de)各(ge)圓(yuan)均變(bian)為(wei)直(zhi)線(xian)(xian)，作為(wei)齒(chi)(chi)(chi)(chi)(chi)廓的(de)(de)漸開線(xian)(xian)也變(bian)為(wei)直(zhi)線(xian)(xian) 齒(chi)(chi)(chi)(chi)(chi)條(tiao)(tiao)與齒(chi)(chi)(chi)(chi)(chi)輪(lun)(lun)相(xiang)比，其(qi)(qi)特點為(wei)： 由于齒(chi)(chi)(chi)(chi)(chi)條(tiao)(tiao)的(de)(de)齒(chi)(chi)(chi)(chi)(chi)廓是直(zhi)線(xian)(xian)，所以(yi)(yi)齒(chi)(chi)(chi)(chi)(chi)廓上各(ge)點的(de)(de)法線(xian)(xian)平(ping)(ping)行，而且(qie)在傳動(dong)時齒(chi)(chi)(chi)(chi)(chi)條(tiao)(tiao)是做(zuo)平(ping)(ping)動(dong)，齒(chi)(chi)(chi)(chi)(chi)廓上各(ge)點速度(du)的(de)(de)大小和(he)方向一(yi)致(zhi)所以(yi)(yi)各(ge)點的(de)(de)壓(ya)力(li)角相(xiang)等，其(qi)(qi)大小等于齒(chi)(chi)(chi)(chi)(chi)廓的(de)(de)傾(qing)斜(xie)(xie)角，稱為(wei)齒(chi)(chi)(chi)(chi)(chi)形角 由于齒(chi)(chi)(chi)(chi)(chi)條(tiao)(tiao)上各(ge)齒(chi)(chi)(chi)(chi)(chi)同側的(de)(de)齒(chi)(chi)(chi)(chi)(chi)廓是平(ping)(ping)行的(de)(de)，所以(yi)(yi)不(bu)論(lun)在分度(du)線(xian)(xian)上或齒(chi)(chi)(chi)(chi)(chi)頂線(xian)(xian)上或與其(qi)(qi)平(ping)(ping)行的(de)(de)其(qi)(qi)它直(zhi)線(xian)(xian)上，其(qi)(qi)齒(chi)(chi)(chi)(chi)(chi)距都相(xiang)等齒(chi)(chi)(chi)(chi)(chi)條(tiao)(tiao)也分直(zhi)齒(chi)(chi)(chi)(chi)(chi)齒(chi)(chi)(chi)(chi)(chi)條(tiao)(tiao)和(he)斜(xie)(xie)齒(chi)(chi)(chi)(chi)(chi)齒(chi)(chi)(chi)(chi)(chi)條(tiao)(tiao)，分別與直(zhi)齒(chi)(chi)(chi)(chi)(chi)圓(yuan)柱齒(chi)(chi)(chi)(chi)(chi)輪(lun)(lun)和(he)斜(xie)(xie)齒(chi)(chi)(chi)(chi)(chi)圓(yuan)柱齒(chi)(chi)(chi)(chi)(chi)輪(lun)(lun)配(pei)對使用； 　

齒條的齒廓(kuo)為(wei)(wei)直線而(er)非漸開(kai)線（對齒面而(er)言則為(wei)(wei)平面），相當于分度圓(yuan)半徑(jing)為(wei)(wei)無窮大圓(yuan)柱齒輪　　

齒條的主要特點

（1） 由于齒(chi)條齒(chi)廓為(wei)直線(xian)，所以齒(chi)廓上各點具有相同(tong)的壓力角(jiao)，且等于齒(chi)廓的傾斜角(jiao)，此角(jiao)稱為(wei)齒(chi)形角(jiao)，標準值為(wei)20°。　　

（2） 與(yu)齒頂線(xian)平行的任一(yi)條直線(xian)上具有相同的齒距和模數。　　

（3） 與齒頂線平行(xing)且齒厚等于齒槽寬的(de)直線稱為分度線（中線），它是(shi)計算齒條尺寸的(de)基(ji)準(zhun)線。

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