设计简介
摘 要
随着汽车工业的迅猛发展，车型的多样化、个性化已经成为汽车发展的趋势。而变速器设计是汽车设计中重要的环节之一。它是用来改变发动机传到驱动轮上的转矩和转速，因此它的性能影响到汽车的动力性和经济性指标，对轿车而言，其设计意义更为明显。在对汽车性能要求越来越高的今天，车辆的舒适性也是评价汽车的一个重要指标，而变速器的设计如果不合理，将会使汽车的舒适性下降，使汽车的运行噪声增大。本设计针对乘用车变速器进行系统深入的研究.
本设计基于捷达变速器，结合机械变速器的设计方法，深入研究了变速器传动比的计算，挡数的分配，齿轮参数的计算，轴及轴承的选择等，从而使乘用车的舒适性和动力性有很大的提高。
关键字：传动比；挡数；齿轮参数；轴；轴承
ABSTRACT
With the rapid development of automobile industry, the diversity of models, individual has become a developing trend. The transmission design is an important part of automotive design one. It is used to change the engines torque and reached the driving wheel speed, so its impact on vehicle dynamic performance and economy indicators, on cars, its more obvious sense of design. Performance in increasingly high demand on the car today, the vehicles comfort is an important index for evaluation of car, and transmission design, if unreasonable, will decrease the comfort of the automobile, so that the car is running the noise increases. The design for the passenger car transmission system in-depth study carried out
The design is based on Jetta transmission, combined with mechanical transmission design, in-depth study of the transmission gear ratio calculation, the distribution of the number block, the calculation of gear parameters, choice of shaft and bearing, so passenger comfort and dynamic have greatly improved.
Keywords: transmission ratio; Keeps off the number; gear parameters; axis; bearings
目 录
摘要...................................................................I
Abstract................................................................II
第1章 绪论...........................................................1
1.1 概述..............................................................1
1.1.1 变速器的发展现状.............................................2
1.1.2 研究的目的、依据和意义.......................................3
1.1.3 研究的方法..............................................3
第2章 变速器主要参数的选择与计算...................................4
2.1 设计初始数据...............................................4
2.2 变速器各挡传动比的确定........................................4
2.3 变速器传动方案的确定..............................................6
2.4 中心距的确定...................................................7
2.5 齿轮参数...........................................7
2.5.1 模数..........................................7
2.5.2 压力角..........................................8
2.5.3 螺旋角.........................................8
2.5.4 齿宽..........................................8
2.5.5 齿顶高系数............................................9
2.6 本章小结...................................................9
第3章 齿轮的设计计算与校核..........................................10
3.1 齿轮的设计与计算.................................................10
3.1.1 各挡齿轮齿数的分配...........................................10
3.1.2 齿轮材料的选择原则.........................................19
3.1.3计算各轴的转矩.........................................20
3.2 轮齿的校核.............................................20
3.2.1 轮齿弯曲强度计算............................................20
3.2.2 轮齿接触应力...........................................24
3.3 本章小结.............................................29
第4章 轴的设计与计算及轴承的选择与校核...........................30
4.1 轴的设计计算..........................................30
4.1.1 轴的工艺要求.............................................30
4.1.2 初选轴的直径.......................................30
4.1.3 轴的强度计算.........................................31
4.2 轴承的选择及校核.............................................36
4.2.1 输入轴的轴承选择与校核.....................................36
4.2.2 输出轴轴承校核.........................................37
4.3 本章小结...............................................38
结论.............................................................39
参考文献...............................................40
致谢.................................................................41
随着汽车工业的迅猛发展，车型的多样化、个性化已经成为汽车发展的趋势。而变速器设计是汽车设计中重要的环节之一。它是用来改变发动机传到驱动轮上的转矩和转速，因此它的性能影响到汽车的动力性和经济性指标，对轿车而言，其设计意义更为明显。在对汽车性能要求越来越高的今天，车辆的舒适性也是评价汽车的一个重要指标，而变速器的设计如果不合理，将会使汽车的舒适性下降，使汽车的运行噪声增大。本设计针对乘用车变速器进行系统深入的研究.
本设计基于捷达变速器，结合机械变速器的设计方法，深入研究了变速器传动比的计算，挡数的分配，齿轮参数的计算，轴及轴承的选择等，从而使乘用车的舒适性和动力性有很大的提高。
关键字：传动比；挡数；齿轮参数；轴；轴承
ABSTRACT
With the rapid development of automobile industry, the diversity of models, individual has become a developing trend. The transmission design is an important part of automotive design one. It is used to change the engines torque and reached the driving wheel speed, so its impact on vehicle dynamic performance and economy indicators, on cars, its more obvious sense of design. Performance in increasingly high demand on the car today, the vehicles comfort is an important index for evaluation of car, and transmission design, if unreasonable, will decrease the comfort of the automobile, so that the car is running the noise increases. The design for the passenger car transmission system in-depth study carried out
The design is based on Jetta transmission, combined with mechanical transmission design, in-depth study of the transmission gear ratio calculation, the distribution of the number block, the calculation of gear parameters, choice of shaft and bearing, so passenger comfort and dynamic have greatly improved.
Keywords: transmission ratio; Keeps off the number; gear parameters; axis; bearings
目 录
摘要...................................................................I
Abstract................................................................II
第1章 绪论...........................................................1
1.1 概述..............................................................1
1.1.1 变速器的发展现状.............................................2
1.1.2 研究的目的、依据和意义.......................................3
1.1.3 研究的方法..............................................3
第2章 变速器主要参数的选择与计算...................................4
2.1 设计初始数据...............................................4
2.2 变速器各挡传动比的确定........................................4
2.3 变速器传动方案的确定..............................................6
2.4 中心距的确定...................................................7
2.5 齿轮参数...........................................7
2.5.1 模数..........................................7
2.5.2 压力角..........................................8
2.5.3 螺旋角.........................................8
2.5.4 齿宽..........................................8
2.5.5 齿顶高系数............................................9
2.6 本章小结...................................................9
第3章 齿轮的设计计算与校核..........................................10
3.1 齿轮的设计与计算.................................................10
3.1.1 各挡齿轮齿数的分配...........................................10
3.1.2 齿轮材料的选择原则.........................................19
3.1.3计算各轴的转矩.........................................20
3.2 轮齿的校核.............................................20
3.2.1 轮齿弯曲强度计算............................................20
3.2.2 轮齿接触应力...........................................24
3.3 本章小结.............................................29
第4章 轴的设计与计算及轴承的选择与校核...........................30
4.1 轴的设计计算..........................................30
4.1.1 轴的工艺要求.............................................30
4.1.2 初选轴的直径.......................................30
4.1.3 轴的强度计算.........................................31
4.2 轴承的选择及校核.............................................36
4.2.1 输入轴的轴承选择与校核.....................................36
4.2.2 输出轴轴承校核.........................................37
4.3 本章小结...............................................38
结论.............................................................39
参考文献...............................................40
致谢.................................................................41
