汽车螺旋弹簧离合器的设计演示文档.ppt
南京航空航天大学金城学院毕业论文题目汽车离合器结构分析和计算机辅助设计学生:俞皓镪学号:2005012238参考文献1臧杰,阎岩.汽车构造M.机械工业出版社,2005,8.2王望予主编.汽车设计M.机械工业出版社,2004,8.3徐石安,江发潮.汽车离合器M.清华大学出版社,2005,2.4刘惟信主编.汽车设计M.清华大学出版社,2001,7.5林世裕主编.螺旋弹簧与碟形弹簧离合器的设计与制造M.东北大学,2005.6汽车标准汇编(20002004)M.中国汽车技术研究中心标准研究所,2005.7阎春利,张希栋.汽车离合器螺旋弹簧的优化设计J.林业机械与木工设备,2006,3.8廖林清,曹建国.汽车离合器螺旋弹簧的三次设计J.四川兵工学报,2001,2.9司传胜.汽车螺旋弹簧离合器的优化设计J.林业机械与木工设备,2004,12.10李林,刘惟信.汽车离合器螺旋弹簧的优化设计J.清华大学学报,2000,5.11林明芳等.汽车离合器螺旋弹簧的优化设计J.汽车工程,2003,2.12刘红欣.螺旋弹簧应力分布的试验和有限元分析J.力学与实践,2003,3.13张卫波.汽车螺旋弹簧离合器智能优化设计技术研究J.中国工程机械学报,2007,1.14肖文颖,许海华.离合器螺旋弹簧的优化设计J.公路与汽运,2007,4.15程汉应.汽车离合器摩擦片数量选择及其参数优化设计J.汽车工程,2001,7.16浦定真.螺旋弹簧离合器的设计与研究J.汽车技术,2006,6.17赵波,赵晓昱.汽车离合器的相关参数优化与分析J.拖拉机与农业运输车,2007,2.18LiuWeixin,GePing,LiWei.OptimalDesignTorsionalDampersinAutomobileClutch.ProceeDingsoftheInternationalConferenceonCADofMachinery.2001.19Ahern,Kathy,Manathung,Catherine.Clutch-StaringStalleDResearchStuDets.InnovativeHigherEDucation.2004.摘要以内燃机在作为动力的机械传动汽车中,离合器是作为一个独立的总成而存在的。离合器通常装在发动机与变速器之间,其主动部分与发动机飞轮相连,从动部分与变速器相连。为各类型汽车所广泛采用的摩擦离合器,实际上是一种依靠其主、从动部分间的摩擦来传递动力且能分离的机构。离合器的主要功用是切断和实现发动机与传动系平顺的接合,确保汽车平稳起步;在换挡时将发动机与传动系分离,减少变速器中换档齿轮间的冲击;在工作中受到较大的动载荷时,能限制传动系所承受的最大转矩,以防止传动系个零部件因过载而损坏;有效地降低传动系中的振动和噪音。本车设计采用单片螺旋弹簧离合器。本车采用的摩擦式离合器是因为其结构简单,可靠性强,维修方便,目前大多数汽车都采用这种形式的离合器。而采用干式离合器是因为湿式离合器大多是多盘式离合器,用于需要传递较大转矩的离合器,而该车型不在此列。采用螺旋弹簧离合器是因为螺旋弹簧离合器具有很多优点:首先,由于螺旋弹簧具有非线性特性,因此可设计成当摩擦片磨损后,弹簧压力几乎可以保持不变,且可减轻分离离合器时的踏板力,使操纵轻便;其次,螺旋弹簧的安装位置对离合器轴的中心线是对的,因此其压力实际上不受离心力的影响,性能稳定,平衡性也好;再者,螺旋弹簧本身兼起压紧弹簧和分离杠杆的作用,使离合器的结构大为简化,零件数目减少,质量减小并显著地缩短了其轴向尺寸;另外,由于螺旋弹簧与压盘是以整个圆周接触,使压力分布均匀,摩擦片的接触良好,磨损均匀,也易于实现良好的散热通风等。由于螺旋弹簧离合器具有上述一系列的优点,并且制造螺旋弹簧的工艺水平也在不断地提高,因而这种离合器在轿车及微型、轻型客车上已得到广泛的采用,而且逐渐扩展到载货汽车上。从动盘选择单片式从动盘是一位其结构简单,调整方便。压盘驱动方式采用传动片式是因为其没有太明显的缺点且简化了结构,降低了装配要求又有利于压盘定中。选择拉式离合器是因为其较拉式离合器零件数目更少,结构更简化,轴向尺寸更小,质量更小;并且分离杠杆较大,使其踏板操纵力较轻。关键字:螺旋弹簧离合器螺旋弹簧离合器摩擦片减振盘AbstractTotheinternalcombustionengineasthedrivingforceinthemechanicaltransmissioncar,theclutchistheassemblyasanindependentexistence.Clutchisusuallypackedinbetweentheengineandtransmission,theactivepartconnectedwiththeengineflywheel,driveninpartconnectedwiththetransmission.Forvarioustypesofmotorvehiclesiswidelyusedinfrictionclutch,infact,isakindofrelyontheirowners,driveninparttofrictionbetweenthetransmissionpowercanseparateagencies.Themainfunctionoftheclutchiscutoffandtheengineandtransmissionsystemtoachievesmoothjoint,toensurethatasmoothstart;intheshiftwillbeseparatedfromtheengineandpowertraintoreducethetransmissionofshocksbetweenthegearshift;initsworkbythelargerdynamicloadwhenthetransmissionsystemtolimittheburdenofthemaximumtorquetopreventthepowertraincomponentsofthedamageduetooverload;effectivelyreducethetransmissionlinesofthevibrationandnoise.Thedesignusesasinglecarcoilspringclutch.Thecarusedclutchfrictionbecauseofitssimplestructure,reliability,maintenanceconvenience,themajorityofvehiclescurrentlyusingthisformofclutch.Theuseofdry-typeclutchisbecausemostofthewetclutchisamulti-discclutch,fortheneedforgreatertorquetransmissionclutch,andthemodelisnotincluded.Theuseofcoilspringcoilspringclutchbecausetheclutchhasmanyadvantages:First,thecoilspringhasnonlinearcharacteristics,itcanbedesignedtowearwhenthefrictionplate,thespringpressurecanbemaintainedalmostunchanged,andreducetheseparationoftheclutchpedalatthetimeofabilitytomanipulatelight;Secondly,thecoilspringontheinstallationlocationofthecenterlineoftheclutchshaftisright,sothepressureisnotinfacttheeffectsofcentrifugalforce,stableperformance,orbalance;Inaddition,thecoilspringitself,andfromcompressthespringandsplittheroleofleverage,sothatgreatlysimplifiedthestructureoftheclutch,sparepartstoreducethenumber,qualityandsignificantlyreducedtoreducethesizeofitsaxial;Inaddition,asaresultofcoilspringandthepressureplatecontactstheentirecircumference,sothatthepressuredistribution,goodcontactswithfrictionplate,wearuniform,butalsoeasytoachievegoodheatventilation.Asthespiralspringclutchwithaseriesofadvantagesoftheabove,andcoilspringmanufacturingprocesshasbeentoraisethelevel,sothattheclutchinthecarandmicro,lightbushasbeenwidelyused,andgraduallyextendedtothecargovehicle.Followerplatechoiceofsingle-chipsetisafollowerofitssimplestructure,convenientadjustment.Platendrivetransmissionchipusedisnottoomuchbecauseofitsobviousshortcomingsandtosimplifythestructure,assemblyrequirementsandreducesthepressureplatewillbeinfavorof.Pull-typeclutchchoicebecauseofitspartsthanthenumberofpull-typeclutchless,morestreamlinedstructure,theaxialsizesmaller,thequalityofevensmaller;andagreaterseparationoftheleversothatitisrelativelysmallpedalmanipulation.Keywords:spiralspringclutchcoilspringclutchfrictionplatevibrationplate