毕业设计（论文）-重型自卸车货箱与举升装置设计（含全套CAD图纸）.doc

车辆与动力工程学院设计说明书  重型自卸车货箱与举升装 置设计  摘要  自卸汽车是利用发动机动力驱动液压举升机构，将货箱倾斜一定角度从 而达到自动卸货的目的，并依靠货箱自重使其复位的。自卸机构负责货物的 举升倾卸，卸货时驾驶员操纵液压阀的控制手柄，动力由发动机输出经变速 器再到取力器，取力器驱动液压泵给液压缸提供动力，液压缸推动货箱实现 货物的倾卸。液压举升机构是自卸汽车的重要工作系统之一，其结构形式、 性能好坏直接影响自卸汽车的使用性能和安全性能。 本次毕业设计的主要内容集中于自卸汽车液压缸及液压系统的设计，介 绍了液压设计的前期准备工作：设计的依据、设计的一般原则和设计步骤。 通过 对自卸汽车举升机 构几种方案的比较 ,确定 该车的举升机构的方 案, 并对该方案进行了力学分析计算和液压系统设计。设计采用直推式举升机构, 具有结构简单,行程长,兼具经济性的特 点。然后对液压缸的 刚度、强度、系 统压力、升降时间进行了验算和校核，最终确定了该方案的合理性和安全性。 另外，本说明书对取力器和货箱也进行了设计和计算。 关键词：自卸汽车，液压系统，举升机构，取力器  i HEAVY 车辆与动力工程学院设计说明书 DUMP TRUCK PACKING CASE AND THE DE SIGN OF LIFT ING DEVICE  ABSTRACT  The dump truck uses the engine power actuation hydr aulic pr ess ure lif ting organization, packing container incline certain angle, thus serves the pur pos e which unloads cargo automatically, and depends upon the packing container dead weight to cause its replacement. The auto- dumping mechanism is mainly responsible for the lif ting and dumping of the goods.When the goods ar e needed to be unloaded, the oper ator will control the handle of the hydraulic valve,and then the goods are dumped by the series of engines fr om the engine to the gear box,and then to the power-out device driving the liquid pump to give the power to liquid tank ,which pushes the compartment to tilt the goods. The hydraulic pressure lifting or ganization is one of dump trucks impor tant wor k systems , its str uctur al style, perf or mance quality immediate influence dump tr ucks oper ational perf or mance and safety perf or mance. The content of this graduation design has focused on the design of the dump tr uck hydr aulic cylinder and hydr aulic systems,intr oducing the design of hydraulic des ign pr eparation wor k,and the design basis ,general principles and steps. Compar ed with the several plans of lifting mechanis m ,we have chosen one plan finally,f or we have designed the calculation of the mechanical analysis and the hydr aulic system.The design put to use to keep the push type lifting mechanism,