摩托车专用升降平台设计..doc

摩托车专用升降平台设计 摘要: 升降台的种类很多，按照升降结构的不同，可分为剪叉式升降台、升缩式升降台、套筒式升降台、升缩臂式升降台及折臂式升降台等。液压升降台采用液压驱动，整机由主机、液压系统、控制系统组成。 本文所介绍的摩托车专用升降台最大载重量是500kg，它有两部分组成：剪叉机构和液压系统。剪叉机构的操作控制是由脚踏式液压泵和液压缸来完成的。这样的液压升降台的设计通常根据设计参数要求，粗略估算剪叉尺寸，然后求出液压缸推力，从而进行液压缸选型。由于液压缸的尺寸及摆放的位置不同，设计当中可能会产生干涉。解决的办法是通过对机构中三种液压缸布置方式的分析和比较，确立一种方案，并根据需要，设计最优的剪叉机构，及对连接零件、滑动装置的选型等。在满足机构设计的基础上，对受力较大的机构进行强度和刚度的校核，检验是否满足设计要求。作为控制系统，液压系统的设计很重要，这包括回路保压设计，液压泵的选取及其他元件的选型等。最终完成摩托车专用升降台的设计。本设计借鉴了相关的资料，采用了相关的标准，充分的吸收了前人的宝贵的经验。 关键词：升降台，液压系统，剪叉机构，脚踏式液压泵，液压缸 指导老师签名： THE DESIGN OF THE LIFT TABLE RESERVED FOR MOTOR BICYCLE Student name:Wang Hao Class:0781053 Supervisor:Yuan Ning Abstract : There are many types of lift table, according to the structure of the different movements ,which can be divided into scissors-lifts or shrink-lifts ,sleeve-lifts or shrink arm lifts and arm –folding lifts and so on . The hydraulic pressure actuation is used in hydraulic pressure lift table, and the whole machine was made of the main body, the hydraulic system and the control system. Maximal load capacity of hydraulic press described by this paper is 500 kg , it has two parts: this scissors fork and hydraulic pressure system. This operation of the scissors fork is under the control of foot-operated hydraulic pump and hydraulic cylinder.Such hydraulic lifts are usually designed in accordance with the requirements of the design parameters, then the hydraulic cylinder thrust force is extracted by the sketchy estimate size.Thus the typle of the hydraulic cylinder can be sure. As the size of hydraulic cylinders and the positions for securing are different, it possibly have the interference in the design. The solution is to establish a programe through the analysis and comparison in the hydraulic cylinder layout.According to the need, we can design the optimal scissors fork, and select the connector of parts, sliding devices and so on. In the foundation of the design,the intensity and the rigidity examination to the large stress organ