輪式拖拉機是什么

輪式拖拉機是拖拉機的一類(lei)，即行(xing)走裝置(zhi)是輪(lun)子的拖(tuo)拉機(ji)(ji)。（別(bie)于履帶式拖(tuo)拉機(ji)(ji)）有(you)二輪(lun)（手扶(fu)拖(tuo)拉機(ji)(ji)）、四(si)輪(lun)等(deng)多種(zhong)型式。又分后輪(lun)驅(qu)動和(he)四(si)輪(lun)驅(qu)動。大馬力(li)輪(lun)式拖(tuo)拉機(ji)(ji)有(you)較好的牽引性能，適于大農場配帶寬(kuan)幅農具進行(xing)高速作(zuo)業。

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輪式拖拉機工作原理

拖(tuo)(tuo)(tuo)拉(la)機(ji)(ji)能(neng)行(xing)駛(shi)(shi)是(shi)靠內(nei)燃(ran)機(ji)(ji)的(de)動(dong)(dong)(dong)(dong)力(li)(li)(li)(li)經傳動(dong)(dong)(dong)(dong)系統(tong)，使驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)輪(lun)(lun)獲得驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)扭(niu)矩Mk，獲得驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)扭(niu)矩的(de)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)輪(lun)(lun)再通過輪(lun)(lun)胎花紋和輪(lun)(lun)胎表面(mian)給(gei)地(di)面(mian)小(xiao)、向后(hou)的(de)水平(ping)(ping)作(zuo)用力(li)(li)(li)(li)（切線力(li)(li)(li)(li)），而地(di)面(mian)對驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)力(li)(li)(li)(li)大小(xiao)相等(deng)、方(fang)向相反的(de)水平(ping)(ping)反作(zuo)用力(li)(li)(li)(li)Pk，這(zhe)個Pk反作(zuo)用力(li)(li)(li)(li)就是(shi)推動(dong)(dong)(dong)(dong)拖(tuo)(tuo)(tuo)拉(la)機(ji)(ji)向前(qian)(qian)行(xing)駛(shi)(shi)的(de)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)力(li)(li)(li)(li)（也(ye)(ye)稱喂推進力(li)(li)(li)(li)）。當驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)力(li)(li)(li)(li)Pk足以(yi)克服前(qian)(qian)后(hou)車輪(lun)(lun)向前(qian)(qian)滾動(dong)(dong)(dong)(dong)阻力(li)(li)(li)(li)和所帶農具的(de)牽(qian)引(yin)阻力(li)(li)(li)(li)時(shi)，拖(tuo)(tuo)(tuo)拉(la)機(ji)(ji)便向前(qian)(qian)行(xing)駛(shi)(shi)。若將驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)輪(lun)(lun)支(zhi)離(li)地(di)面(mian)，即驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)力(li)(li)(li)(li)Pk等(deng)于零，則驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)輪(lun)(lun)只能(neng)原地(di)空轉，拖(tuo)(tuo)(tuo)拉(la)機(ji)(ji)不能(neng)行(xing)駛(shi)(shi)；若滾動(dong)(dong)(dong)(dong)阻力(li)(li)(li)(li)與(yu)牽(qian)引(yin)阻力(li)(li)(li)(li)之(zhi)和大于驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)力(li)(li)(li)(li)Pk時(shi)，拖(tuo)(tuo)(tuo)拉(la)機(ji)(ji)也(ye)(ye)不能(neng)行(xing)駛(shi)(shi)。由此可見(jian)輪(lun)(lun)式(shi)拖(tuo)(tuo)(tuo)拉(la)機(ji)(ji)行(xing)駛(shi)(shi)是(shi)由驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)扭(niu)矩驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)輪(lun)(lun)與(yu)地(di)面(mian)間的(de)相互作(zuo)用而實現的(de)，并且驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)力(li)(li)(li)(li)要大于滾動(dong)(dong)(dong)(dong)阻力(li)(li)(li)(li)與(yu)牽(qian)引(yin)阻力(li)(li)(li)(li)之(zhi)和。

輪式拖拉機需要什么駕駛證

不(bu)同形式的(de)(de)拖拉機駕照不(bu)同，根(gen)據《拖拉機駕駛證申(shen)領(ling)和使用規(gui)定》第八條規(gui)定，拖拉機、聯(lian)合收割機駕駛人員準予駕駛的(de)(de)機型分(fen)為：

1、輪式(shi)拖拉機(ji)，代號為G1；

2、手扶拖(tuo)拉機(ji)，代(dai)號為K1；

3、履帶拖拉機，代號為L；

4、輪(lun)式拖拉機運輸機組，代號為(wei)G2(準予駕駛輪(lun)式拖拉機)；

5、手扶拖拉機運輸機組，代號為K2(準予駕駛手扶拖拉機)；

6、輪式聯合收割機，代號為R；

7、履帶式聯合收割(ge)機(ji)，代號為S。