轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)機總成即轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi),又(you)名轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)機、方(fang)向(xiang)(xiang)機,它(ta)是(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)系(xi)中(zhong)最重(zhong)要的(de)(de)部件。它(ta)的(de)(de)作用是(shi):增(zeng)大(da)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)盤(pan)傳到轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)傳動機構(gou)的(de)(de)力(li)和(he)改變(bian)力(li)的(de)(de)傳遞(di)方(fang)向(xiang)(xiang)。轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)的(de)(de)操縱是(shi)全(quan)液(ye)(ye)壓(ya)(ya)式(shi)(shi)(shi)(shi),也就是(shi)說(shuo)在(zai)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)柱(zhu)和(he)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)輪(lun)(lun)之(zhi)間沒有機械連接(jie),在(zai)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)與轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)油缸之(zhi)間是(shi)液(ye)(ye)壓(ya)(ya)管(guan)或(huo)軟管(guan)鏈接(jie)。當轉(zhuan)(zhuan)(zhuan)(zhuan)動方(fang)向(xiang)(xiang)盤(pan),轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)根據方(fang)向(xiang)(xiang)盤(pan)轉(zhuan)(zhuan)(zhuan)(zhuan)動比例輸送相(xiang)對的(de)(de)油量(liang),該(gai)油量(liang)直(zhi)接(jie)流到操縱缸相(xiang)應一側,同時另一側的(de)(de)油量(liang)回到油箱。轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)按(an)結構(gou)形(xing)式(shi)(shi)(shi)(shi)可分(fen)為:有齒(chi)輪(lun)(lun)齒(chi)條式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)、蝸(gua)桿曲柄(bing)指銷(xiao)式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)、循(xun)環球-齒(chi)條齒(chi)扇式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)、循(xun)環球曲柄(bing)指銷(xiao)式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)、蝸(gua)桿滾輪(lun)(lun)式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)等。按(an)照助力(li)形(xing)式(shi)(shi)(shi)(shi)又(you)可以分(fen):為機械式(shi)(shi)(shi)(shi)(無助力(li))轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi),和(he)動力(li)式(shi)(shi)(shi)(shi)(有助力(li))轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)兩種(zhong),其中(zhong)動力(li)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)(qi)又(you)可以分(fen)為氣壓(ya)(ya)動力(li)式(shi)(shi)(shi)(shi)、液(ye)(ye)壓(ya)(ya)動力(li)式(shi)(shi)(shi)(shi)、電(dian)(dian)動助力(li)式(shi)(shi)(shi)(shi)、電(dian)(dian)液(ye)(ye)助力(li)式(shi)(shi)(shi)(shi)等種(zhong)類。
G90(null)是(shi)上汽MAXUS的國(guo)產(chan)車廠上汽(qi)大(da)通(tong)于(yu)2022年推出(chu)的一款MPV,最新年款為2022
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