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支重輪的主要結構：

輪(lun)體、支(zhi)(zhi)(zhi)重(zhong)輪(lun)軸(zhou)(zhou)、軸(zhou)(zhou)套、密封圈、端蓋(gai)等相(xiang)關部件(jian)構成。支(zhi)(zhi)(zhi)重(zhong)輪(lun)可分為單(dan)邊(bian)支(zhi)(zhi)(zhi)重(zhong)輪(lun)與雙邊(bian)支(zhi)(zhi)(zhi)重(zhong)輪(lun)；挖掘(jue)機用(yong)支(zhi)(zhi)(zhi)重(zhong)輪(lun)與推土(tu)機用(yong)支(zhi)(zhi)(zhi)重(zhong)輪(lun)，挖掘(jue)機用(yong)支(zhi)(zhi)(zhi)重(zhong)輪(lun)一般是黑色油(you)漆，推土(tu)機支(zhi)(zhi)(zhi)重(zhong)輪(lun)一般是黃色油(you)漆。    

支(zhi)重輪容(rong)易出現在(zai)問題

A、輪體磨損。出(chu)現這(zhe)種情況的(de)原因是采用的(de)鋼材不合(he)格或者(zhe)說材料(liao)熱處理(li)時的(de)硬度較低，耐磨性不足；

B、漏油。支重輪軸通過軸套(tao)一直在(zai)旋轉，輪體內要加油來潤(run)滑，但如(ru)果(guo)說密封(feng)圈不好的話，很(hen)容易產生漏油的現象，這(zhe)樣軸與軸套(tao)在(zai)無潤(run)滑的情況下，很(hen)容易磨損(sun)，造成產品無法進(jin)行(xing)使用。因此，

支(zhi)重輪密封的(de)好壞是(shi)作(zuo)為衡量生產(chan)公司(si)產(chan)品質量的(de)一個很重要(yao)的(de)標準(zhun)。

全(quan)輪(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)也分(fen)兩種(zhong)(zhong)(zhong)形(xing)(xing)式：一(yi)(yi)種(zhong)(zhong)(zhong)是(shi)全(quan)時(shi)全(quan)輪(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)，即(ji)全(quan)部時(shi)間都(dou)是(shi)全(quan)輪(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)；另(ling)一(yi)(yi)種(zhong)(zhong)(zhong)是(shi)短時(shi)全(quan)輪(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)，它可(ke)以(yi)切斷某個橋(qiao)的(de)(de)(de)(de)動(dong)(dong)(dong)(dong)力(li)，以(yi)減少燃(ran)料消(xiao)耗(hao)和(he)磨(mo)損，只(zhi)在需要時(shi)再使用全(quan)輪(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)。過(guo)去只(zhi)有越野車(che)采用4輪(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)，一(yi)(yi)般的(de)(de)(de)(de)越野車(che)，變(bian)速(su)器(qi)(qi)后面裝(zhuang)有手動(dong)(dong)(dong)(dong)分(fen)離器(qi)(qi)，前(qian)(qian)(qian)(qian)(qian)后車(che)軸(zhou)(zhou)各裝(zhuang)一(yi)(yi)個稱為驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)橋(qiao)的(de)(de)(de)(de)部件(jian)。變(bian)速(su)器(qi)(qi)輸(shu)(shu)(shu)出的(de)(de)(de)(de)扭(niu)矩(ju)通過(guo)分(fen)力(li)器(qi)(qi)和(he)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)軸(zhou)(zhou)，分(fen)別(bie)傳(chuan)(chuan)遞到(dao)前(qian)(qian)(qian)(qian)(qian)后車(che)軸(zhou)(zhou)上的(de)(de)(de)(de)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)橋(qiao)，再通過(guo)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)橋(qiao)將(jiang)(jiang)扭(niu)矩(ju)傳(chuan)(chuan)遞到(dao)輪(lun)(lun)子(zi)上。現在轎(jiao)車(che)的(de)(de)(de)(de)馬力(li)都(dou)比較大，加(jia)速(su)時(shi)重心后移，全(quan)車(che)重量就會向后軸(zhou)(zhou)移動(dong)(dong)(dong)(dong)，造(zao)成前(qian)(qian)(qian)(qian)(qian)軸(zhou)(zhou)輕(qing)飄。前(qian)(qian)(qian)(qian)(qian)輪(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)的(de)(de)(de)(de)轎(jiao)車(che)即(ji)使在良好的(de)(de)(de)(de)路面上也會打(da)滑，4輪(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)就可(ke)以(yi)防(fang)止這種(zhong)(zhong)(zhong)現象(xiang)發生。轎(jiao)車(che)上的(de)(de)(de)(de)4輪(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)裝(zhuang)置是(shi)常嚙合式，增加(jia)了粘性(xing)耦合器(qi)(qi)，省(sheng)去了手動(dong)(dong)(dong)(dong)分(fen)力(li)器(qi)(qi)，自(zi)動(dong)(dong)(dong)(dong)將(jiang)(jiang)扭(niu)矩(ju)按需分(fen)配在前(qian)(qian)(qian)(qian)(qian)后輪(lun)(lun)子(zi)上。在正(zheng)常路面上，4輪(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)裝(zhuang)置將(jiang)(jiang)引擎(qing)輸(shu)(shu)(shu)出扭(niu)矩(ju)的(de)(de)(de)(de)92%分(fen)配到(dao)前(qian)(qian)(qian)(qian)(qian)輪(lun)(lun)，8%分(fen)配到(dao)后輪(lun)(lun)；在滑溜的(de)(de)(de)(de)路面上，將(jiang)(jiang)至(zhi)少40%的(de)(de)(de)(de)引擎(qing)機輸(shu)(shu)(shu)出扭(niu)矩(ju)分(fen)配給后輪(lun)(lun)；當(dang)前(qian)(qian)(qian)(qian)(qian)輪(lun)(lun)開始打(da)滑時(shi)，前(qian)(qian)(qian)(qian)(qian)、后輪(lun)(lun)的(de)(de)(de)(de)轉速(su)差(cha)異會使耦合器(qi)(qi)中的(de)(de)(de)(de)粘液立即(ji)變(bian)稠并鎖住耦合器(qi)(qi)，從而使傳(chuan)(chuan)動(dong)(dong)(dong)(dong)軸(zhou)(zhou)只(zhi)將(jiang)(jiang)扭(niu)矩(ju)傳(chuan)(chuan)遞至(zhi)后輪(lun)(lun)，待前(qian)(qian)(qian)(qian)(qian)、后輪(lun)(lun)的(de)(de)(de)(de)轉速(su)差(cha)異消(xiao)失就自(zi)動(dong)(dong)(dong)(dong)回復原有驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)形(xing)(xing)式。

適(shi)(shi)時(shi)驅動(dong)(dong)(dong)適(shi)(shi)時(shi)驅動(dong)(dong)(dong)介(jie)乎全時(shi)驅動(dong)(dong)(dong)和(he)分時(shi)驅動(dong)(dong)(dong)之間，驅動(dong)(dong)(dong)模式由電(dian)腦(nao)安排(pai)，操縱(zong)非常簡(jian)單。采用(yong)這種驅動(dong)(dong)(dong)系統的(de)(de)(de)車(che)輛時(shi)根據電(dian)腦(nao)來(lai)控制并(bing)且選(xuan)擇適(shi)(shi)合當下情況的(de)(de)(de)驅動(dong)(dong)(dong)模式。在正常的(de)(de)(de)路面上車(che)輛一般會采用(yong)后輪(lun)驅動(dong)(dong)(dong)的(de)(de)(de)方式，而(er)一旦遇(yu)到路面不良或(huo)驅動(dong)(dong)(dong)輪(lun)打滑(hua)的(de)(de)(de)情況，電(dian)腦(nao)就(jiu)會自動(dong)(dong)(dong)檢測(ce)并(bing)立即將發動(dong)(dong)(dong)機輸出扭矩(ju)分配給前排(pai)的(de)(de)(de)兩個車(che)輪(lun)，自然切(qie)(qie)換(huan)到四(si)(si)輪(lun)驅動(dong)(dong)(dong)狀態，從而(er)免除了(le)(le)駕駛人的(de)(de)(de)判斷和(he)手(shou)動(dong)(dong)(dong)操作，應用(yong)更(geng)加簡(jian)單。不過以(yi)目前的(de)(de)(de)效果來(lai)看(kan)，電(dian)腦(nao)比起人腦(nao)速度還(huan)是慢了(le)(le)很多，也(ye)就(jiu)是說住(zhu)往不能及時(shi)進行(xing)驅動(dong)(dong)(dong)模式的(de)(de)(de)切(qie)(qie)換(huan)，反應較慢。比如(ru)北京現代生(sheng)產的(de)(de)(de)途勝就(jiu)是采用(yong)適(shi)(shi)時(shi)四(si)(si)驅設計。