23(毕业设计)福田轻型货车制动系统设计

北京建筑工程学院本科生毕业设计（论文）I摘要制动系统是汽车中最重要的系统之一。因为随着高速公路的不断发展，汽车的车速将越来越高，对制动系的工作可靠性要求日益提高,制动系工作可靠的汽车能保证行驶的安全性。由此可见，本次制动系统设计具有实际意义。本次设计主要是对轻型货车制动系统结构进行分析的基础上，根据对轻型货车制动系统的要求，设计出合理的符合国家标准和行业标准的制动系统。首先制动系统设计是根据整车主要参数和相关车型，制定出制动系统的结构方案，其次设计计算确定前、后鼓式制动器、制动主缸的主要尺寸和结构形式等。最后利用计算机辅助设计绘制出了前、后制动器装配图、制动主缸装配图、制动管路布置图。最终对设计出的制动系统的各项指标进行评价分析。另外在设计的同时考虑了其结构简单、工作可靠、成本低等因素。结果表明设计出的制动系统是合理的、符合国家标准的。关键词：轻型货车；制动；鼓式制动器；制动主缸；液压系统.北京建筑工程学院本科生毕业设计（论文）IIAbstractBrakingsystemisoneofthemostimportantsystemintheautomotive.becauseofthecontinuousdevelopmentwiththehighway.Thecarwillbecomemoreandmorehigh-speed,brakingsystemontheworkoftheincreasingreliabilityrequirements,Brakeworkofareliablecar,guaranteethesafetyoftravelling,Thisshowsthat,Thebrakingsystemdesignofpracticalsignificance.Thebrakingsystemisoneofimportantsystemofactivesafety.Basedonthestructuralanalysisandthedesignrequirementsofintermediatecar’sbrakingsystem,abrakingsystemdesignisperformedinthisthesis,accordingtothenationalandprofessionalstandards.Firstthroughanalyzingthemainparametersoftheentirevehicle,thebrakingsystemdesignstartsfromdeterminationofthestructurescheme.SecondlyCalculatinganddeterminingthemaindimensionandstructuraltypeofthefront、reardrumbrake，brakemastercylinderanssoon，Finallyuseofcomputer-aideddesigndrawingdrawtheengineeringdrawingsofthefrontandrearbrakes,themasterbrakecylinder,thediagramofthebrakepipelines.Furthermore,eachtargetofthedesignedsystemisanalyzedforcheckingwhetheritmeetstherequirements.somefactorsareconsideredinthisthesis,suchassimplestructure,lowcosts,andenvironmentalprotection,etc.Theresultshowsthatthedesignisreasonableandaccurate,comparingwiththerelatednationalstandards.Keywords：lighttruck；brake；drumbrake；mastercylinder；hydraulicpressuresystem北京建筑工程学院本科生毕业设计（论文）III目录第1章绪论..........................................................................................................11.1本次制动系统设计的意义.......................................................................11.2本次制动系统应达到的目标...................................................................21.3本次制动系统设计内容...........................................................................21.4汽车制动系统的组成...............................................................................31.5制动系统类型............................................................................................31.6制动系工作原理.......................................................................................3第2章汽车制动系统方案确定............................................................................52.1汽车制动器形式的选择...........................................................................52.2鼓式制动器的优点及其分类...................................................................62.3盘式制动器的缺点...................................................................................72.4制动驱动机构的结构形式.......................................................................82.4.1简单制动系.....................................................................................82.4.2动力制动系.....................................................................................92.4.3伺服制动系.....................................................................................92.5制动管路的形式选择.............................................................................102.6液压制动主缸方案的设计.....................................................................11第3章制动系统主要参数的确定....................................................................133.1轻型货车主要技术参数.........................................................................133.2同步附着系数的0的确定.....................................................................133.3前、后轮制动力分配系数的确定.....................................................143.4鼓式制动器主要参数的确定.................................................................143.5制动器制动力矩的确定.........................................................................153.6制动器制动因数计算.............................................................................163.7鼓式制动器零部件的结构设计.............................................................17第4章液压制动驱动机构的设计计算................................................................214.1制动轮缸直径d的确定..........................................................................214.2制动主缸直径d0的计算........................................................................214.3制动踏板力PF........................................................................................22北京建筑工程学院本科生毕业设计（论文）IV4.4制动踏板工作行程Sp............................................................................22第5章制动性能分析..........................................................................................235.1制动性能评价指标.................................................................................235.2制动效能.................................................................................................235.3制动效能的恒定性.................................................................................235.4制动时汽车的方向稳定性.....................................................................245.5前、后制动器制动力分配....................................................