花(hua)(hua)(hua)(hua)鍵(jian)(jian)(jian)(jian)軸(zhou)(zhou)分矩形花(hua)(hua)(hua)(hua)鍵(jian)(jian)(jian)(jian)軸(zhou)(zhou)和漸開線(xian)花(hua)(hua)(hua)(hua)鍵(jian)(jian)(jian)(jian)軸(zhou)(zhou)兩大(da)(da)(da)種類,花(hua)(hua)(hua)(hua)鍵(jian)(jian)(jian)(jian)軸(zhou)(zhou)中的(de)矩形花(hua)(hua)(hua)(hua)鍵(jian)(jian)(jian)(jian)軸(zhou)(zhou)應用(yong)廣泛(fan),而(er)漸開線(xian)花(hua)(hua)(hua)(hua)鍵(jian)(jian)(jian)(jian)軸(zhou)(zhou)用(yong)于(yu)載(zai)荷較(jiao)大(da)(da)(da)，定(ding)(ding)心精(jing)度(du)要(yao)求高，以及尺(chi)寸(cun)較(jiao)大(da)(da)(da)的(de)鏈(lian)接。矩形花(hua)(hua)(hua)(hua)鍵(jian)(jian)(jian)(jian)軸(zhou)(zhou)通常應用(yong)于(yu)飛機(ji)、汽(qi)車、拖(tuo)拉機(ji)、機(ji)床(chuang)制造業(ye)、農業(ye)機(ji)械(xie)及一般機(ji)械(xie)傳(chuan)動(dong)等裝置。由于(yu)矩形花(hua)(hua)(hua)(hua)鍵(jian)(jian)(jian)(jian)軸(zhou)(zhou)多齒(chi)(chi)工作，所以承載(zai)能力(li)(li)高，對中性、導向性不(bu)錯，而(er)其(qi)齒(chi)(chi)根較(jiao)淺的(de)特(te)點(dian)可以使其(qi)應力(li)(li)集中小(xiao)。另外(wai)花(hua)(hua)(hua)(hua)鍵(jian)(jian)(jian)(jian)軸(zhou)(zhou)的(de)軸(zhou)(zhou)與(yu)轂(gu)強度(du)削弱小(xiao)，加(jia)工比較(jiao)方便，用(yong)磨削方法(fa)可以獲得(de)(de)較(jiao)高的(de)精(jing)度(du)。漸開線(xian)花(hua)(hua)(hua)(hua)鍵(jian)(jian)(jian)(jian)軸(zhou)(zhou)用(yong)于(yu)載(zai)荷較(jiao)大(da)(da)(da)，定(ding)(ding)心精(jing)度(du)要(yao)求高，以及尺(chi)寸(cun)較(jiao)大(da)(da)(da)的(de)鏈(lian)接。其(qi)特(te)點(dian)：齒(chi)(chi)廓為漸開線(xian)，受(shou)載(zai)時齒(chi)(chi)上有(you)徑向力(li)(li)，能起自(zi)動(dong)定(ding)(ding)心作用(yong)，使各(ge)齒(chi)(chi)受(shou)力(li)(li)均勻(yun)，強度(du)高壽命長(chang)，加(jia)工工藝與(yu)齒(chi)(chi)輪(lun)相(xiang)同(tong)，易(yi)獲得(de)(de)較(jiao)高精(jing)度(du)和互換性。
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