I摘 要本设计主要根据现代狮跑 2.0L 手动四驱 SUV 汽车的相关技术参数进行分动器和变速器的设计。根据匹配车型的使用条件和车辆参数选择分动器的结构形式，并按照分动器系统的设计步骤和要求，具体进行了分动器轴、齿轮等零部件的相关设计工作和校核工作，在对机械式变速器的发展历史、变速器的地位和作用，以及未来发展趋势进行深入了解的基础上研究了机械式变速器的基本结构和变速原理，对机械式变速器各挡传动路线进行了简要分析，并以此为理论基础，设计了起亚狮跑汽车三轴五档变速器，完成了变速器的布置方案分析、变速器回转件结构参数的确定、同步器设计、各挡齿轮、轴的设计以及强度校核、轴承的使用寿命计算等。关键词： 分动器；设计；变速器；齿轮；同步器 全套图纸，加 IIAbstractThe design is based mainly on the modern lion run manually 2.0L four-wheel-drive SUV vehicle-related parameters at the design of the actuator. In accordance with the conditions of vehicles and vehicle parameters, in accordance with the actuator sub-system design steps and requirements, mainly related to design work, including the sub-center distance of actuators, bevel gear and other parameters. And a sub-axis actuators, gears and other parts of the design and verification of the relevant work. At first, the thesis simply depicted the develop history of mechanical transmission, and it discussed the status and action of mechanical transmission as well as mechanical transmissions current situation and forthcoming development trend. In addition, it studied the mechanical transmissions basic structure and working principle. The transmission operation of every gear was researched. And mechanical transmission of three axles-five gears in KIA was designed based on above analysis. The layout plan of the mechanical transmission and the parameters of revolving parts were chose. At last, the synchronizer, axles and gears were designed and checked.Keywords: Sub-actuator; design； transmission; gear; synchronizer III目 录摘 要 .IAbstract.II第 1 章 绪论 .11.1 分动器简介 .11.1.1 分动器的构造原理及设计要求 .11.1.2 分动器类型 .21.2 变速器的发展概况 .31.2.1 变速器的设计要求 .3第 2 章 主要参数的选择 .42.1 分动器 .42.1.1 档数及传动比 .42.1.2 中心距的确定 .52.1.3 齿轮参数的确定 .52.2 变速器 .82.2.1 传动机构布置方案 .82.2.2 零部件结构方案分析 .102.2.3 档 数及各档传动比 .11 IV2.2.4 中心距的确定 .112.2.5 齿轮参数的确定 .12第 3 章 齿轮的强度计算 .153.1 分动器 .153.1.1 齿轮的失效形式与原因 .153.1.2 齿轮强度的计算与校核 .153.2 变速器 .173.2.1 输入轴常啮合齿轮 .173.2.2 输出轴齿轮 .183.2.3 中间轴齿轮 .19第 4 章 轴的初选与强度计算 .224.1 分动器轴的初选与计算 .