我国自然条件复杂,作物种类繁多,耕作制度多样化,要求拖拉机一机多用。现有的各种传统拖拉机虽然勉强可以工作,但效率和经济性较低。例如,在松软泥泞的土壤上牵引效率低,大部分功率消耗到滚动阻力上.如不从形态上谋求改善,而单纯采用增大功率或改为四轮驱动的方法来增加牵引力,提高生产率,不仅多消耗金属材料,增大初置费用,而且将明显地提高生产成本。为适应不同地区和用途的需要,国外大多发展不同形态的非传统型专 China’s complex natural conditions, a wide range of crops, farming system diversification, requiring a tractor with a multi-purpose. The existing variety of traditional tractors, although barely workable, are less efficient and economical. For example, on loose, muddy soils, traction is inefficient and most of the power is dissipated to rolling resistance, without increasing the power or changing the four-wheel drive to increase traction and increase productivity, Not only consume more metal materials, increase initial costs, but will obviously increase production costs. In order to meet the needs of different regions and uses, most foreign countries develop different forms of non-traditional type