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摘要：当今能源和环境对人类越来越重要。改善人类生活环境的要求越来越高。为了适应这一发展趋势。各国政府学术界核工业街纷纷加大对电动汽车发展的投入。加快电动汽车的商业化进程。虽然电动汽车在能源和行驶里程上还不尽人意。但也足以满足人们的基本需求。从技术发展的角度来看。经过漫长而艰难的历史。店里是一种清洁能源不仅可以取代化石燃料。而且还可以减少有害气体的。二氧化碳排放，防止环境恶化电动汽车面临重大技术突破，预计将成为第21世纪的重要车辆。电动汽车驱动桥的设计采用单电机驱动系统、齿轮箱总成、差速器总成和驱动桥，主动齿轮减速器直接连接到驱动电机上，并通过两级减速器和差速器，将扭矩传递到驱动轮左右。电机轴与轮轴平行，因此减速器由两个圆柱齿轮驱动。半轴采用全浮动结构，通过螺钉与轮毂连接并传递扭矩。桥体采用组合式结构，一端由轮毂轴承支承在车轮上，另一端与减速器连接。关键词：电动车；驱动桥；减速器 Abstract： Todays energy and environment are becoming more and more important to human beings. The requirements for improving the living environment of human beings are getting higher and higher. In order to adapt to this trend of development. The nuclear industrial streets of governments in various countries have increased their investment in the development of electric vehicles. Speed up the commercialization of electric vehicles. Although electric vehicles are still unsatisfactory in energy and driving mileage. But it is also enough to meet the basic needs of people. From the point of view of technical development. Through a long and difficult history. The store is a kind of clean energy that can not only replace fossil fuels. And it can also reduce the harmful gas. Carbon dioxide emissions, to prevent environmental degradation, electric vehicles are facing major technological breakthroughs, and are expected to become important vehicles in the twenty-first century.The drive axle of electric vehicle is designed by single motor drive system, gearbox assembly, differential assembly and drive axle. The active gear reducer is directly connected to the driving motor, and the torque is transmitted to the driving wheel through the two stage reducer and differential. The shaft of the motor is parallel to the wheel shaft, so the reducer is driven by two cylindrical gears. The semi axle adopts a fully floating structure, which is connected by the screw to the hub and transmits the torque. The bridge is composed of a combined structure with one end of the wheel bearing supported on the wheel and the other end connected with the reducer.Key words: Electric Vehicle；Transaxle；Reducer目 录摘要关键词1绪论11.1引言11.2电动车的发展趋势11.3 电动车的组成11.4 电动车驱动系统组成22电动车观光车总体设计 32.1 技术参数32.2 构造形式及工作条件32.3主要参数选择32.3.1 主要尺寸32.3.2 电动车质量32.3.3 电动机参数32.3.4 轮胎参数42.3.5 传动比计算42.3.6 最大爬坡度计算42.4 核心件参数42.5 总体布置计算52.5.1 各部分质量及重心坐标52.5.2 空载及满载时重心坐标52.5.3 轴荷分配计算52.6 稳定性计算 62.6.1 汽车不纵向翻倒的条件62.6.2 汽车不横向翻倒的条件62.7 最小转弯直径的计算62.8 行程计算73 双电动机驱动桥设计83.1 驱动系统总体设计83.2 减速器的设计83.2.1传动比分配83.2.2 运动和动力参数计算83.2.3 齿轮参数计算93.2.4 轴的设计193.2.5 平键的强度校核203.2.6 轴的强度校核203.2.7 轴承的寿命校核253.2.8 减速器箱体的设计273.3 半轴的设计 273.3.1 半轴的形式273.3.2 半轴轴径的确定283.3.3 花键的设计和校核283.3.4 半轴连接螺钉强度校核293.4 轮毂的设