大众速腾轿车五档手动变速器设计

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；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 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.

Key words: Transmission Ratio; Keeps Off The Number; Axis; Bearings

目录

摘要...............................................................I Abstract (Ⅱ)

第1章绪论....... (1)

1.1 本次设计的目的意义 (1)

1.2 变速器的发展现状 (2)

1.3 变速器设计面临的主要问题 (4)

第2章变速器的总体方案设计.......... . . . . (5)

2.1 变速器的功用及设计要求 (5)

2.2 变速器传动机构的形式选择与结构分析 (5)

2.2.1 三轴式变速器与两轴式变速 (5)

2.2.2 倒档的布置方案............... ...... . (5)

2.3 变速器主要零件的结构方案分析 (7)

2.3.1 齿轮型式............... ...... .... . (7)

2.3.2 换档结构型式........... ...... .... .. (7)

2.3.3 轴承型式........... ...... .... .... .. (7)

2.4 传动方案的最终确定.................................... .. .. (8)

2.5 本章小结........................ ...... ...... .. (8)

第3章变速器主要参数的选择与计算................. . (9)

3.1初始数据............................. ...... (9)

3.2变速器各档传动比的确定 (9)

3.3中心距的确定............................ (10)

3.4齿轮参数.............................. .. (11)

3.5 本章小结........................ .. . (12)

第4章齿轮的设计计算与校核............. . . . . . . .. (13)

4.1 齿轮的设计计算... .. .. .................... (13)

4.2 齿轮的强度计算与材料选择.................. ..... ........ .. (22)

4.2.1 齿轮的损坏原因 (22)

4.2.2 齿轮材料的选择 (22)

4.2.3 计算各轴的转矩 (23)

4.2.4 齿轮的强度计算 (23)

4.2.4 齿轮的接触应力............ (27)

4.3 本章小结................ .. . (31)

第5章轴的设计与计算及轴承的选择与校核 (32)

5.1 轴的计算.................... . . . (32)

5.1.1 轴的工艺要求..... .. (32)

5.1.2 初选轴的直径............ .................. (32)

5.1.3 轴的刚度计算............ ................ . (33)

5.1.4 轴的强度计算............ .............. . (35)

5.2 轴承的选择及校核 (37)

5.2.1 输入轴的轴承选择及校核...... . .. ......... . (37)

5.2.1 输出轴的轴承选择及校核............ . (38)

5.3本章小结....... . ... ... .. (39)

第6章变速器同步器与操纵机构的选择........ .. (40)

6.1同步器的选择........... (40)

6.1.1 同步器的工作原理............ .... .. ... ... . (40)

6.1.2 同步环的主要参数的确定........ ... . ... ... . (40)

6.2 变速器的操纵机构........... .. (41)

6.2.1 变速器操纵机构的功用............ ...... ... . (41)

6.2.2 变速器操纵机构应满足的要求.......... ..... . (41)

6.2.3 换挡位置............ . ... ...... .. ... ... . (42)

结论........ . .... ........ . ... ... ... . . . . . . . . . .. ... ... .43参考文献......... ..... ........ . ... . ... .. ... . . .. ... ... (44)

致谢........ .. ..... ........ . ... ... ... ........ . . .. ... ... .45附录........ .. ... ... ... ......... ... ... ........ . . .. ... ... .46