輪式拖拉機是什么

輪式拖拉機是拖拉機的一(yi)類，即行走裝置是輪子的拖(tuo)(tuo)拉機(ji)(ji)(ji)(ji)。（別于履帶式拖(tuo)(tuo)拉機(ji)(ji)(ji)(ji)）有二輪（手扶拖(tuo)(tuo)拉機(ji)(ji)(ji)(ji)）、四輪等多(duo)種型式。又分后輪驅動和四輪驅動。大馬力輪式拖(tuo)(tuo)拉機(ji)(ji)(ji)(ji)有較(jiao)好的牽引(yin)性(xing)能，適于大農場配帶寬幅農具進行高速作業。

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輪式拖拉機工作原理

拖拉機(ji)能行(xing)(xing)駛(shi)(shi)是(shi)靠內燃機(ji)的(de)(de)動(dong)(dong)力(li)(li)(li)(li)(li)經傳動(dong)(dong)系統(tong)，使(shi)驅(qu)(qu)(qu)(qu)動(dong)(dong)輪獲得驅(qu)(qu)(qu)(qu)動(dong)(dong)扭(niu)(niu)矩Mk，獲得驅(qu)(qu)(qu)(qu)動(dong)(dong)扭(niu)(niu)矩的(de)(de)驅(qu)(qu)(qu)(qu)動(dong)(dong)輪再(zai)通(tong)過(guo)輪胎(tai)花紋和(he)輪胎(tai)表(biao)面給地面小、向(xiang)后的(de)(de)水(shui)平(ping)作用(yong)(yong)(yong)力(li)(li)(li)(li)(li)（切線力(li)(li)(li)(li)(li)），而地面對驅(qu)(qu)(qu)(qu)動(dong)(dong)力(li)(li)(li)(li)(li)大小相(xiang)等、方(fang)向(xiang)相(xiang)反(fan)的(de)(de)水(shui)平(ping)反(fan)作用(yong)(yong)(yong)力(li)(li)(li)(li)(li)Pk，這個Pk反(fan)作用(yong)(yong)(yong)力(li)(li)(li)(li)(li)就是(shi)推動(dong)(dong)拖拉機(ji)向(xiang)前(qian)行(xing)(xing)駛(shi)(shi)的(de)(de)驅(qu)(qu)(qu)(qu)動(dong)(dong)力(li)(li)(li)(li)(li)（也(ye)稱喂推進力(li)(li)(li)(li)(li)）。當(dang)驅(qu)(qu)(qu)(qu)動(dong)(dong)力(li)(li)(li)(li)(li)Pk足以克服前(qian)后車輪向(xiang)前(qian)滾動(dong)(dong)阻(zu)力(li)(li)(li)(li)(li)和(he)所帶農具(ju)的(de)(de)牽(qian)(qian)引阻(zu)力(li)(li)(li)(li)(li)時(shi)，拖拉機(ji)便向(xiang)前(qian)行(xing)(xing)駛(shi)(shi)。若(ruo)將驅(qu)(qu)(qu)(qu)動(dong)(dong)輪支離地面，即(ji)驅(qu)(qu)(qu)(qu)動(dong)(dong)力(li)(li)(li)(li)(li)Pk等于(yu)(yu)零，則驅(qu)(qu)(qu)(qu)動(dong)(dong)輪只能原地空轉，拖拉機(ji)不能行(xing)(xing)駛(shi)(shi)；若(ruo)滾動(dong)(dong)阻(zu)力(li)(li)(li)(li)(li)與(yu)牽(qian)(qian)引阻(zu)力(li)(li)(li)(li)(li)之和(he)大于(yu)(yu)驅(qu)(qu)(qu)(qu)動(dong)(dong)力(li)(li)(li)(li)(li)Pk時(shi)，拖拉機(ji)也(ye)不能行(xing)(xing)駛(shi)(shi)。由此可見輪式拖拉機(ji)行(xing)(xing)駛(shi)(shi)是(shi)由驅(qu)(qu)(qu)(qu)動(dong)(dong)扭(niu)(niu)矩驅(qu)(qu)(qu)(qu)動(dong)(dong)輪與(yu)地面間的(de)(de)相(xiang)互作用(yong)(yong)(yong)而實現(xian)的(de)(de)，并(bing)且驅(qu)(qu)(qu)(qu)動(dong)(dong)力(li)(li)(li)(li)(li)要大于(yu)(yu)滾動(dong)(dong)阻(zu)力(li)(li)(li)(li)(li)與(yu)牽(qian)(qian)引阻(zu)力(li)(li)(li)(li)(li)之和(he)。

輪式拖拉機需要什么駕駛證

不同形(xing)式的(de)拖(tuo)拉機(ji)駕(jia)照不同，根據《拖(tuo)拉機(ji)駕(jia)駛證申(shen)領和使用規定(ding)》第八(ba)條規定(ding)，拖(tuo)拉機(ji)、聯合(he)收(shou)割(ge)機(ji)駕(jia)駛人(ren)員(yuan)準予駕(jia)駛的(de)機(ji)型(xing)分為：

1、輪式拖拉(la)機，代號為G1；

2、手扶拖拉(la)機(ji)，代號為K1；

3、履帶拖拉機，代號為(wei)L；

4、輪式拖(tuo)拉機運輸機組，代號(hao)為G2(準予駕駛輪式拖(tuo)拉機)；

5、手(shou)扶拖(tuo)拉機(ji)運(yun)輸機(ji)組，代號(hao)為(wei)K2(準(zhun)予駕駛手(shou)扶拖(tuo)拉機(ji))；

6、輪式(shi)聯合收割機，代號為R；

7、履帶式聯合收割機(ji)，代號為S。