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轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)機(ji)總成即轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)，又名轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)機(ji)、方向(xiang)(xiang)機(ji)，它是(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)系中最(zui)重要的部件。它的作(zuo)用是(shi)：增大轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)盤(pan)傳到(dao)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)傳動(dong)(dong)機(ji)構的力(li)(li)和改變(bian)力(li)(li)的傳遞(di)方向(xiang)(xiang)。轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)的操縱(zong)是(shi)全液(ye)壓式(shi)(shi)，也就是(shi)說在(zai)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)柱和轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)輪(lun)之(zhi)間沒(mei)有(you)機(ji)械連接，在(zai)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)與轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)油(you)缸之(zhi)間是(shi)液(ye)壓管或軟管鏈(lian)接。當轉(zhuan)(zhuan)(zhuan)(zhuan)動(dong)(dong)方向(xiang)(xiang)盤(pan)，轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)根據(ju)方向(xiang)(xiang)盤(pan)轉(zhuan)(zhuan)(zhuan)(zhuan)動(dong)(dong)比例輸送(song)相對的油(you)量，該油(you)量直接流到(dao)操縱(zong)缸相應一側(ce)(ce)，同時另一側(ce)(ce)的油(you)量回到(dao)油(you)箱。轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)按結構形(xing)式(shi)(shi)可(ke)(ke)分(fen)為：有(you)齒(chi)輪(lun)齒(chi)條式(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)、蝸桿曲(qu)柄(bing)指銷式(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)、循環球-齒(chi)條齒(chi)扇式(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)、循環球曲(qu)柄(bing)指銷式(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)、蝸桿滾輪(lun)式(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)等。按照助(zhu)(zhu)力(li)(li)形(xing)式(shi)(shi)又可(ke)(ke)以(yi)分(fen)：為機(ji)械式(shi)(shi)（無助(zhu)(zhu)力(li)(li)）轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)，和動(dong)(dong)力(li)(li)式(shi)(shi)（有(you)助(zhu)(zhu)力(li)(li)）轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)兩種，其中動(dong)(dong)力(li)(li)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)又可(ke)(ke)以(yi)分(fen)為氣壓動(dong)(dong)力(li)(li)式(shi)(shi)、液(ye)壓動(dong)(dong)力(li)(li)式(shi)(shi)、電(dian)動(dong)(dong)助(zhu)(zhu)力(li)(li)式(shi)(shi)、電(dian)液(ye)助(zhu)(zhu)力(li)(li)式(shi)(shi)等種類。
賽(sai)歐兩廂(xiang)
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