轉(zhuan)(zhuan)向(xiang)機(ji)總成即轉(zhuan)(zhuan)向(xiang)器(qi)(qi),又名轉(zhuan)(zhuan)向(xiang)機(ji)、方(fang)向(xiang)機(ji),它是(shi)轉(zhuan)(zhuan)向(xiang)系中(zhong)最(zui)重要的(de)部件。它的(de)作用是(shi):增大轉(zhuan)(zhuan)向(xiang)盤傳(chuan)到(dao)轉(zhuan)(zhuan)向(xiang)傳(chuan)動(dong)機(ji)構的(de)力(li)(li)(li)(li)和改(gai)變力(li)(li)(li)(li)的(de)傳(chuan)遞方(fang)向(xiang)。轉(zhuan)(zhuan)向(xiang)器(qi)(qi)的(de)操(cao)縱(zong)是(shi)全液(ye)(ye)壓式(shi)(shi)(shi),也就是(shi)說(shuo)在轉(zhuan)(zhuan)向(xiang)柱和轉(zhuan)(zhuan)向(xiang)輪(lun)之(zhi)間沒有機(ji)械(xie)連(lian)接(jie),在轉(zhuan)(zhuan)向(xiang)器(qi)(qi)與轉(zhuan)(zhuan)向(xiang)油(you)(you)(you)缸(gang)之(zhi)間是(shi)液(ye)(ye)壓管(guan)或軟管(guan)鏈(lian)接(jie)。當轉(zhuan)(zhuan)動(dong)方(fang)向(xiang)盤,轉(zhuan)(zhuan)向(xiang)器(qi)(qi)根據方(fang)向(xiang)盤轉(zhuan)(zhuan)動(dong)比例輸送相(xiang)(xiang)對的(de)油(you)(you)(you)量(liang),該油(you)(you)(you)量(liang)直接(jie)流到(dao)操(cao)縱(zong)缸(gang)相(xiang)(xiang)應(ying)一(yi)側,同時另一(yi)側的(de)油(you)(you)(you)量(liang)回到(dao)油(you)(you)(you)箱。轉(zhuan)(zhuan)向(xiang)器(qi)(qi)按結構形式(shi)(shi)(shi)可分(fen)(fen)為:有齒輪(lun)齒條(tiao)式(shi)(shi)(shi)轉(zhuan)(zhuan)向(xiang)器(qi)(qi)、蝸桿曲柄指銷式(shi)(shi)(shi)轉(zhuan)(zhuan)向(xiang)器(qi)(qi)、循(xun)(xun)環球(qiu)-齒條(tiao)齒扇式(shi)(shi)(shi)轉(zhuan)(zhuan)向(xiang)器(qi)(qi)、循(xun)(xun)環球(qiu)曲柄指銷式(shi)(shi)(shi)轉(zhuan)(zhuan)向(xiang)器(qi)(qi)、蝸桿滾輪(lun)式(shi)(shi)(shi)轉(zhuan)(zhuan)向(xiang)器(qi)(qi)等。按照助(zhu)(zhu)力(li)(li)(li)(li)形式(shi)(shi)(shi)又可以分(fen)(fen):為機(ji)械(xie)式(shi)(shi)(shi)(無助(zhu)(zhu)力(li)(li)(li)(li))轉(zhuan)(zhuan)向(xiang)器(qi)(qi),和動(dong)力(li)(li)(li)(li)式(shi)(shi)(shi)(有助(zhu)(zhu)力(li)(li)(li)(li))轉(zhuan)(zhuan)向(xiang)器(qi)(qi)兩種(zhong),其中(zhong)動(dong)力(li)(li)(li)(li)轉(zhuan)(zhuan)向(xiang)器(qi)(qi)又可以分(fen)(fen)為氣(qi)壓動(dong)力(li)(li)(li)(li)式(shi)(shi)(shi)、液(ye)(ye)壓動(dong)力(li)(li)(li)(li)式(shi)(shi)(shi)、電(dian)動(dong)助(zhu)(zhu)力(li)(li)(li)(li)式(shi)(shi)(shi)、電(dian)液(ye)(ye)助(zhu)(zhu)力(li)(li)(li)(li)式(shi)(shi)(shi)等種(zhong)類。
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