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半挂车的自卸,目前只有在大型拖拉机上靠拖拉机的液压输出传动来实现,但还没有载重量为一吨的小型自卸半挂车。为了满足农民对小型半挂车的自卸要求,我县农机修造厂研制了7CHY—1型小型液压自卸挂车。该车的液压系统包括手压柱塞泵、泵座阀体、单作用柱塞油缸(图1)。油缸下支座设在支承架后端中部,上支座设在车厢底部,用开式油路传递液压能,
The dump of a semi-trailer, which is currently only achieved by tractor-driven hydraulic output on large tractors, has not yet been possible with a small dump semi-trailer with a payload of one tonne. In order to meet the peasants on the small semi-trailer dump requirements, the county agricultural machinery repair factory developed a 7CHY-1 small hydraulic dump truck. The car’s hydraulic system includes hand-pressure plunger pump, pump seat valve body, single-acting piston cylinder (Figure 1). The lower bearing of the cylinder is arranged at the middle of the rear end of the support frame, the upper support is arranged at the bottom of the carriage body, the hydraulic energy is transmitted by the open oil passage,