文档介绍：购买后包含有 CAD 图纸和论文, 咨询 Q401339828 摘要 I 摘要变速器的作用是改变发动机的驱动轮上的转矩和转速, 它能固定或分档改变输出轴和输入轴转动比,又称变速箱。变速传动机构和变速器操纵机构两个部分组成了变速器。汽车的一些性能指标比如燃油经济性、制动性、行驶平顺性、使用年限以及轻便性与稳定性、等都与变速器的整体构造要求有着密切的关系。三轴式变速器因为具有质量轻、体积小、工作效率高、操作简单等优点,因此广泛应用于一般大多数汽车。本次设计主要研究了三轴式七档变速器,主要考察对机械原理、机械制造基础、汽车构造、汽车设计等科目知识的熟练掌握和运用,对三轴式变速器零件的详细认真的设计,并利用 AutoCAD 、Pro /E等制图软件绘制总装配图和各个零件图等内容。首先,本文将叙述变速器的背景及发展历史, 介绍国内外变速器近年来总体发展趋势。然后,阐述了变速器的工作原理,与不同的变速器结构方案进行对比,最后确定完善合理的结构方案进行展开深入的设计。接着,先分析变速器的各档齿轮、轴、轴承结构形状, 然后做简单的设计构思, 同时受力分析齿轮弯曲强度, 轴的刚度与强度并校核。结尾,本文简单叙述了变速器中液力变矩器的设计。关键词: 三轴式变速器;轴;齿轮;轴承;液力变矩器购买后包含有 CAD 图纸和论文, 咨询 Q401339828Abstract II A BSTRACT Transmission to change the engine reached on the driving wheel torque and speed, It can change the output shaft and the input shaft transmission ratio, also known as the speed change box. Transmission speed bya variable speed transmission and control mechanism of two parts. Some performance indexes such as fuel economy, braking performance, fort, service life, portability and stability, and soon, are closely related to the overall structural requirements of transmission . Because of the advantages of light weight, small volume, high efficiency and simple operation, the three axle transmission is widely used in most cars .This design study of the three-axis 7-speed manual transmission, The main investigation of the mechanical principles, mechanical manufacturing, automobile construction, automotive design and other subjects of knowledge mastery and use of the three shaft transmission parts of the detailed design , and the use of AutoCAD, Pro /E drawing software drawing assembly diagram and parts diagram. First of all, this paper describes the background and development history of transmission, introduces the overall development trend and direction of domestic and foreign transmission in recent years. Then, it describes the working principle of the transmission, compared with the different transmission structure, and finally determined to improve the reasonable structure of the progr