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某中级轿车前轮制动器设计说明书[带图纸].doc

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某中级轿车前轮制动器设计说明书[带图纸].doc

摘要本科毕业设计(论文)题目某中级轿车前轮制动器设计专业机械设计制造及其自动化班级姓名学号指导教师日期2013年5月摘要摘要本设计的题目为某中级轿车前轮制动器设计,本设计选用前轮盘式制动盘式制动器分为定钳盘式和浮钳盘式。在充分了解制动器的结构及工作原理的基础上借助多方面的资料进行设计、论证再选定相关参数并进行计算确定具体参数如下制动力分配前轴制动力Fu14486.3N后轴制动力Fu29405.2N同步附着系数00.7制动器效能因数k0.6制动力矩制动力矩是制动器产生的,迫使汽车减速或停止的阻力矩,由该车所能遇到的最大附着系数制动强度q车轮有效半径er汽车满载质量G汽车轴距L通过计算得出前轮的制动力矩为Mu11358.15Nm后轮制动力矩Mu2497.2Nm由以上参数进行设计计算确定主要零部件尺寸和制造材料最后对制动系统性能要求进行校核,并用solidworks三维软件绘制出制动器零件的零件模型和制动器装配模型。关键词制动性能solidworks盘式制动器摘要AbstractThetopicofthisdesignforthedesignofthefrontwheelbrakeaintermediatecar,thisdesignselectsthefrontdiscbrakediscbrakecaliperdiscisdividedintofixedandfloatingcaliper.Onthebasisofunderstandingthestructureandworkingprincipleofthebrake,withvariousmaterialstodesign,demonstratetheselectedparametersandthecalculationtodeterminethespecificparametersareasfollowsThebrakingforcedistributionfrontaxlebrakingforceFu14486.3NtherearaxlebrakingforceFu29045.2N.Thesynchronousadhesioncoefficient00.7Brakeeffiencyfactork0.6BraketorqueBraketorqueisgeneratedbythebrake,torqueforcecartoslowdownorstop,maximumadhesioncoefficientcanmeetthevehicleseverityofbrakingqtheeffectiveradiusreThecarloadedwithqualityGthevehiclewheelbaseLcalculationthefrontwheelbraketoequeMu11358.15Nm,therearwheelbraketoequeMu2497.2NmThedesigncalculationofmainpartssizeandmaterialfromtheaboveparameters,thebrakesystemperformancerequirementsofapplications,anduseSolidWorkssoftwaretodrawthepartsof3Dmodelandthebrakebrakepartsmodel.Keywordsbrakingperformancesolidworksdiscbrake目录目录第一章绪论................................................................................................................................11.1制动系统设计的意义.........................................................................................................11.2制动器的发展历程............................................................................................................11.3国内汽车盘式制动器的应用..........................................................................................21.4国外汽车盘式制动器的应用..........................................................................................31.5目前制动器的发展现状...................................................................................................5第二章制动器的结构与设计原则...........................................................................112.1汽车制动系功用及分类.................................................................................................112.2盘式制动器的分类与介绍.............................................................................................112.3盘式制动器的结构与工作原理...................................................................................142.4制动器设计的一般原则.................................................................................................152.4.1制动效能.......................................................................................................................162.4.2制动效能稳定性.........................................................................................................162.4.3制动间隙调整简便性................................................................................................162.4.4制动器的尺寸及质量................................................................................................162.4.5噪音的减轻..................................................................................................................17第三章制动器设计.........................................................................................................183.1主要设计参数.....................................................................................................................183.2盘式制动器主要元件........................................................................................................183.2.1制动盘...........................................................................................................................183.2.2制动块...........................................................................................................................203.2.3制动钳...........................................................................................................................213.2.4衬块报警装置设计.....................................................................................................223.2.5摩擦材料.......................................................................................................................223.2.6制动器间隙及调整.....................................................................................................223.3制动器制动力分配分析.................................................................................................233.4同步附着系数的选取........................................................................................................233.5制动器效能因数.................................................................................................................233.6制动器制动力矩的计算...................................................................................................233.7制动系统性能要求............................................................................................................233.7.1制动时汽车的方向稳定性的要求.........................................................................263.7.2制动减速度的要求.....................................................................................................263.7.3制动距离的要求..........................................................................................26目录3.7.4制动力矩的要求..........................................................................................263.7.5对车轮制动器的比能量耗散率的要求................................................................273.7.6对比摩擦力的要求.....................................................................................................273.7.7对热流密度的要求..................................................................................................273.7.8对衬块吸收功率的要求............................................................................................273.7.9对平均摩擦力的要求................................................................................................273.7.10行车制动至少有两套独立的驱动器的管路.....................................................283.7.11防止水和污泥进入制动器工作表面...................................................................283.7.12要求制动能力的热稳定性好................................................................................283.7.13操纵轻便.....................................................................................................................283.7.14紧急制动时踏板力的计算.....................................................................................283.7.15制动踏板行程的计算..............................................................................................293.7.16其他..............................................................................................................................293.8摩擦衬片的磨损特性......................................................................................................29第四章校核.........................................................................................................................324.1制动器的热容量和温升的核算.....................................................................................324.2.1制动盘的技术要求....................................................................................................334.2.2制动钳技术总成要求................................................................................................334.2.3前轮轮毂总成技术要求............................................................................................33结论.35参考文献......36致谢....38附录....411、总装配模型2、各零件模型3、总装配模型爆炸视图

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