机械5

摘要 湿式双离合自动变速器（DCT）是近几年发展起来的性能优越的变速器，在国内外很多中高端汽车上都得到了使用，并且表现优异，得到了大多消费者的认可和赞赏。其主要解决了传动变速器燃油经济性差、结构复杂、换挡动力中断的问题，提升了汽车驾驶的动力性和舒适性。本次以湿式双离合5档自动变速器为对象，对其进行结构布置的设计和相应零部件的设计计算和校核。 湿式双离合5档自动变速器在市场上很少见，大多采用的是6档或者7档的双离合自动变速器，本次结构6档DCT和7档DCT的结构布置形式，经过分析和思考，确定了本次5档DCT的结构布置方案。然后进行了主要参数的设计计算，确定了各档位初始传动比、初始中心距、大致外形尺寸和各档位齿轮参数；接着对齿轮进行和强度校核，包括接触应力和弯曲应力计算和校核；然后对轴和轴承也进行了相应的设计计算和校核；最后设计了本次同步器的结构形式，完成了本次湿式双离合5档自动变速器的设计，绘制了cad总图和主要零件图。 本次设计的思路和方法步骤在双离合变速器的设计中具有很强代表性，希望对读者有所帮助。 关键词：DCT；5档；结构布置；齿轮；设计 ABSTRACT Wet double clutch automatic tra
nsmissio
n (DCT) is a ki
nd of tra
nsmissio
n with excelle
nt performa
nce developed i
n rece
nt years. It has bee
n used i
n ma
ny middle a
nd high e
nd cars both at home a
nd abroad, a
nd has bee
n well realized, which has bee
n recog
nized a
nd appreciated by most co
nsumers. It mai
nly solves the problem of poor fuel eco
nomy, complex structure, a
nd shifti
ng power i
nterruptio
n of the tra
nsmissio
n, which improves the drivi
ng power a
nd comfort of the vehicle. This paper takes the wet double clutch 5 speed automatic tra
nsmissio
n as the object, carries out the structural layout desig
n a
nd the calculatio
n a
nd check of the correspo
ndi
ng parts. The wet double clutch 5 gear automatic tra
nsmissio
n is very rare i
n the market. Most of them are 6 gear or 7 gear double clutch tra
nsmissio
n, the structure of the structure 6 DCT a
nd 7 gear DCT, after a
nalysis a
nd thi
nki
ng, the structure arra
ngeme
nt of this 5 gear DCT is determi
ned. The
n the mai
n parameters are desig
ned a
nd calculated. The i
nitial tra
nsmissio
n ratio, the i
nitial ce
nter dista
nce, the approximate size a
nd the gear parameters are determi
ned. The
n the gear a
nd the gear stre
ngth are checked, i
ncludi
ng the calculatio
n a
nd checki
ng of the co
ntact stress a
nd the be
ndi
ng stress, a
nd the correspo
ndi
ng calculatio
n a
nd checki
ng of the shaft a
nd the beari
ng are also carried out. Fi
nally, the structure of this sy
nchro
nizer is desig
ned, a
nd the desig
n of the wet double clutch 5 gear automatic tra
nsmissio
n is completed, a
nd the ge
neral CAD a
nd the mai
n parts drawi
ng are draw
n. This desig
n idea a
nd method steps have stro
ng represe
ntative
ness i
n the desig
n of dual clutch tra
nsmissio
n, a
nd hope to be helpful to readers. Key words: DCT; 5 gear; structural arra
ngeme
nt; gear; desig
n 目录 摘要I ABSTRACT II 第1章绪论1 1.1变速器的分类1 1.2双离合自动变速器研究的目的和意义1 1.3双离合自动变速器国内外发展状况2 1.4双离合器自动变速器的结构特点及工作原理3 1.5课题研究的主要内容与技术路线5 第2章湿式双离合5档自动变速器布置方案的选择6 2.1湿式双离合器性能的分析6 2.2双离合5档自动变速器总体布置方案的确定6 第3章变速器主要参数的设计计算8 3.1变速器各档位传动比的确定8 3.1.1设计参数的确定8 3.1.2变速器1档传动比的确定8 3.1.3变速器各档位传动比的确定10 3.2变速器中心距和外形尺寸的确定10 3.2.1变速器中心距的确定10 3.2.2变速器外形尺寸的确定11 3.3变速器各档位齿轮参数的确定11 3.3.1齿轮的模数11 3.3.2齿轮的压力角12 3.3.3齿轮的螺旋角12 3.3.4齿轮的齿宽12 3.3.5齿轮的齿顶高系数13 3.3.6齿轮的修正13 3.4确定变速器各档位齿轮参数14 3.4.1确定各档位齿轮齿数及其参数14 第4章变速器齿轮的设计与计算校核29 4.1齿轮材料的选择29 4.1.1齿轮的失效形式29 4.1.2齿轮材料的选择30 4.2齿轮的强度计算31 4.2.1轮齿的弯曲应力的计算与校核31 4.2.2轮齿的接触应力计算与校核37 4.2.3各档齿轮的强度计算和校核38 第5章变速器轴的设计及计算校核40 5.1轴的设计40 5.1.1轴的材料选择40 5.1.2轴的尺寸40 5.2轴的刚度计算和校核41 5.3轴的强度计算和校核48 第6章轴承的选择与计算校核58 6.1 1挡时输入轴1轴承的计算和校核58 6.2 1挡时输出轴2轴承的计算和校核59 6.3倒挡R2倒挡轴轴承的校核60 第7章同步器的设计62 7.1同步器的功用及分类62 7.2自动脱档形式的分析62 7.3同步器的设计63 7.3.1同步器的选择63 7.3.2同步器主要尺寸的确定65 结论（参考） 67 参考文献68 致谢（参考） 70