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轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)機總成即轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)(qi)(qi)，又(you)名轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)機、方(fang)向(xiang)(xiang)機，它是(shi)轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)系中最重要(yao)的(de)(de)(de)部件。它的(de)(de)(de)作(zuo)用是(shi)：增大轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)盤傳到轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)傳動(dong)(dong)(dong)機構的(de)(de)(de)力(li)和(he)改變力(li)的(de)(de)(de)傳遞方(fang)向(xiang)(xiang)。轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)(qi)(qi)的(de)(de)(de)操(cao)縱(zong)是(shi)全液(ye)(ye)(ye)壓(ya)(ya)式(shi)(shi)，也就是(shi)說(shuo)在轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)柱和(he)轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)輪之(zhi)間沒(mei)有機械(xie)連接，在轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)(qi)(qi)與轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)油(you)缸之(zhi)間是(shi)液(ye)(ye)(ye)壓(ya)(ya)管或軟管鏈接。當轉(zhuan)(zhuan)(zhuan)動(dong)(dong)(dong)方(fang)向(xiang)(xiang)盤，轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)(qi)(qi)根(gen)據(ju)方(fang)向(xiang)(xiang)盤轉(zhuan)(zhuan)(zhuan)動(dong)(dong)(dong)比例輸送相對的(de)(de)(de)油(you)量(liang)，該油(you)量(liang)直(zhi)接流到操(cao)縱(zong)缸相應一(yi)側，同時另一(yi)側的(de)(de)(de)油(you)量(liang)回到油(you)箱。轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)(qi)(qi)按結構形式(shi)(shi)可分(fen)為：有齒輪齒條式(shi)(shi)轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)(qi)(qi)、蝸桿曲(qu)柄指(zhi)銷式(shi)(shi)轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)(qi)(qi)、循環球(qiu)-齒條齒扇式(shi)(shi)轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)(qi)(qi)、循環球(qiu)曲(qu)柄指(zhi)銷式(shi)(shi)轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)(qi)(qi)、蝸桿滾輪式(shi)(shi)轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)(qi)(qi)等(deng)。按照助(zhu)力(li)形式(shi)(shi)又(you)可以(yi)分(fen)：為機械(xie)式(shi)(shi)（無助(zhu)力(li)）轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)(qi)(qi)，和(he)動(dong)(dong)(dong)力(li)式(shi)(shi)（有助(zhu)力(li)）轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)(qi)(qi)兩種(zhong)，其中動(dong)(dong)(dong)力(li)轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)(qi)(qi)又(you)可以(yi)分(fen)為氣壓(ya)(ya)動(dong)(dong)(dong)力(li)式(shi)(shi)、液(ye)(ye)(ye)壓(ya)(ya)動(dong)(dong)(dong)力(li)式(shi)(shi)、電動(dong)(dong)(dong)助(zhu)力(li)式(shi)(shi)、電液(ye)(ye)(ye)助(zhu)力(li)式(shi)(shi)等(deng)種(zhong)類。
西部(bu)大力神是(shi)華晨金杯汽(qi)車生(sheng)產的(de)一款皮(pi)卡車。
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