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I当前在汽车维修中所使用的液压同步升降平台在汽车的维修方面发挥着重要的作用，通过对同步升降平台的各种液压阀、液压缸、液压泵站的创新改进，使得液压同步升降平台拥有运行平稳、噪声低、响应速度快、同步精度高等优点，对于在我国汽车的维修与保养中起着不可替代的作用，应用前景广泛。44444444S店汽车维修专用升降机是双铰接剪叉式升降机，它是在原由的剪叉式升降机的基础上，运用现在的灵活性、安全性、经济性等指标；结构以能够满足灵活性要求较高的汽车维修需要为前提而设计的。通过对双铰接剪叉式升降机机构位置参数和动力参数的分析，结合具体实例，对机构中两种液压缸布置方式分析比较，并根据要求对液压传动系统各部分进行设计计算最终确定液压执行元件-液压缸，通过对叉杆的各项受力分析确定台板与叉杆的载荷要求，最终完成剪叉式液压升降机的设计要求。关键字：升降台；剪叉式；结构设计；液压摘要IIHydraulicsynchronizingliftingplatformcurrentlyusedinautomobilerepairplaysanimportantroleinautomobilerepair,byimprovingtheinnovationofvarioushydraulicvalves,synchronousliftingplatformhydrauliccylinder,hydraulicstation,hydraulicsynchronizingliftingplatformwiththesmoothrunning,lownoise,fastresponsespeed,synchronousprecision,itplaysanirreplaceableroleintherepairandmaintenanceofcarsinChina,extensiveapplicationprospect.Double-hingedscissorsliftsinthedesignofthepreviouslyscissorsliftsonthebasisofthepresentapplicationflexibility,security,economicandotherindicators,structuralflexibilitytomeethigherrequirementsofvehiclemaintenancetheneedforpremise,andtheresponsebydifferentmodelstomeetvehiclemaintenance,andotherperformancerequirements.Throughthedouble-hingedscissorsliftsPositionparameterandthedynamicparametersoftechnology,combinedwithspecificexamples,theagencyimprovedinthehydrauliccylinderlayoutanalysisandcomparison,andinaccordancewiththerequirementsofpartofahydraulicsystemdesignandcalculationoffinalPressureimplementationcomponents-hydrauliccylinder,throughanalysisofthefork-definedplateandfork-loadrequirements,thefinalcompletionofscissorshydraulicliftsthedesignrequirements.KeyWords：liftingplatform；scissorsforks；configurationdesign；hydraulicpressureAbstractIII摘要..............................................................................................................................................IAbstract..........................................................................................................................................II目录.............................................................................................................................................III第一章绪论.........................................................................................................................11.1升降机的发展简史................................................................................................................11.2汽车升降机的设计特点........................................................................................................21.3汽车升降机的安全保证措施................................................................................................21.3.1设计制造方面的安全保证措施..................................................................................31.3.2使用维护方面的安全保证措施..................................................................................3第二章剪叉式升降台的应用及其受力分析的讨论...................................................................52.1剪叉式升降平台的三种结构形式........................................................................................52.2双铰接剪叉式升降平台机构的位置参数计算....................................................................62.3双铰接剪叉式升降平台机构的动力参数计算....................................................................82.4剪叉式升降平台机构设计时应注意的问题........................................................................92.5针对性比较小实例：............................................................................................................92.6双铰接剪叉式升降平台机构中两种液压缸布置方式的分析比较...................................112.6.1问题的提出：.............................................................................................................112.6.2两种布置方式的分析和比较：.................................................................................122.6.3实例计算.....................................................................................................................14第三章液压传动系统的设计计算.............................................................................................173.1明确设计要求制定基本方案：.........................................................................................173.2制定液压系统的基本方案...................................................................................................173.2.1确定液压执行元件的形式.........................................................................................173.2.2确定液压缸的类型....................................................................................................183.2.3确定液压缸的安装方式............................................................................................183.2.4缸盖联接的类型........................................................................................................193.2.5拟订液压执行元件运动控制回路.............................................................................193.2.6液压源系统.................................................................................................................193.3确定液压系统的主要参数...................................................................................................193.3.1载荷的组成与计算：...................................................................................