随着农业生产体制的改革和农村商品经济的发展,小型四轮拖拉机因其适应性强,方便多用,销量成倍增长。但驾驶员和有关科技人员常因气刹装置占用主机动力、浪费能源、操作不便及原有的油刹装置分泵内置、改气刹工艺复杂、切领蹄单位面积压强超标、总体布置不合理等影响制动而伤脑筋。 With the reform of agricultural production system and the development of rural commodity economy, small four-wheel tractors have doubled their sales due to their adaptability and convenience. However, pilots and related scientific and technical personnel often occupy main engine power due to air brake device, which is a waste of energy. The operation is inconvenient and the existing oil brake device has built-in sub-pumps. The process of changing gas brake is complicated and the pressure per unit area of ​​cut collar hoof is excessive. Affect the braking and headache.