轿车变速器设计（有设计图纸）.doc

前言前言 1 1 汽车的总体设计 6 1.1 汽车类型的确定 6 1.1.1 按汽车的用途分类 6 1.1.2 按动力装置的类型分类 7 1.1.3 轿车发动机与驱动桥在汽车位置上的分类 7 1.2 汽车主要参数的选择 7 1.2.1 汽车主要尺寸参数的选择 7 1.2.2 汽车质量参数的确定 8 1.2.3 汽车主要性能参数的选择 ８ 1.3 汽车发动机的选型 ８ 2 变速器的设计 10 2.1 概述 11 2.2 变速器的结构分析与型式选择 11 2.3 汽车变速器的挡数和各档传动比的确定 13 2.3.1 汽车传动系统最小传动比的选择 13 2.4 轿车变速器机构方案的选择 14 2.5 变速器的设计参数选择 16 2.5.1 中心距A 16 2.5.2 外形尺寸 16 2.5.3 轴的直径 16 2.6 齿轮参数 17 2.7 各档齿轮齿数的分配 18 2.8 轮齿强度计算 20 2.9 轴的设计计算 22 2.10 轴的强度计算 22 2.11 同步器的选择 24 3 变速器的操纵机构 25 4 结论 28 致谢 29 参考文献 30 附录A 31 附录B 35 摘要 随着汽车工业的发展， 关键词：变速器；扭矩；操纵机构 Abstract Along with the automobile industry development, the automobile already enter the common people’s family, enter the people’s life. Therefore, the transmission gearbox took one of automobile main components, we must make further research for the transmission gearbox. The engine output rotational speed is extremely high, the maximum work rate and the maximum torque ap better use. Key word: Transmission gearbox; Torque; Control mechanism 汽车是作为一种交通工具而产生的，但发展到今天已经不能把它理解为单纯的行的手段因为“汽车化”nceforth， new transmission systems such as belt- or toroidal-CVTs (continuously variable transmissions) will also need to have their capacity increased and/or weight and size minimized. To accommodate these needs， their pulleys， output discs and power rollers should have improved contact fatigue strength in terms of resisting pitting， wear， and flaking. We are confident that using the new carbonitriding process， and the developed high strength steel optimized for that process， will contribute to further improving automatic transmissions， final drive systems， and CVTs by improving their reliability and reducing their weight， size， and manufacturing costs. References： [1] T.B. Massalski. Et al.， Binary Alloy Phase Diagrams， second ed.， 2. ASM International， p. 1792. [2] M. Yoshida， et al.， A study on the pitting Fatigue Strength of Carburized Gears (in Japanese with English summary)， JSAE， Vol. 27， No. 2， pp. 125-130 (1996). [3] Y. Watanabe， e