汽车用三轴五速变速箱的设计.doc

轿车变速箱的设计 据中国汽车工业协会统计分析汽车双超辆，增速大幅提升，高于年初预计，并且再次刷新全球纪录，为止，已连续五年蝉联。 汽车传动组成部分科学技术的发展，了手动变速自动变速自动变速 本设计任务是前置后驱（ront engine Rear wheel drive, 简称FR）式小轿车用手动变速设计。R在轴荷分配上可以达到最佳比例，因此它具有较好的操控性稳定性、动力性和制动性优点高性能汽车至今依然喜欢采用主要原因变速箱具有体积小、简单、工作可靠和操纵方便等优点，大多数汽车得到应用。 在和了汽车理论和设计知识的基础上，手动变速的设计方案，传动机构布置、主要参数的选择、设计与计算、同步器设计、操纵机构、结构元件；其次，根据所给定参数和条件，齿轮、轴轴承等主要零件的理论分析utoCAD、Pro/E、SolidWorks、UG和CAE中的，所建立的三进行有限元分析，优化将优化后的模型再进行模拟仿真得到结果 三轴式五速变速前进挡和一个倒挡并通过锁环式同步器来实现换挡。有3主要的传动轴：一轴（）二轴（）中间轴（）所以称三轴式变速，另外还有轴功用是：1.传动比，在较大范围内改变汽车的行驶速度和汽车驱动轮上转矩的数值，以适应经常变化的行驶条件，同时使发动机在有利的（较高而油耗率较低）下工作；2.旋转方向不变的前提下，利用实现行驶；3.不熄的情况下，利用空挡中断动力传递，可以使驾驶员松开离合器踏板离开驾驶位置，且便于汽车启动怠速、和动力输出。 ：变速箱，传动比，中间轴，第二轴齿轮，锁环式同步器 THE DESIGN OF SALOON GEARBOX ABSTRACT According to China Association of Automobile Manufacturers, the number of automobiles sales has rapidly increased to 20 million, which is higher than that estimated at the start of the year. The result has set a new record again, and won five consecutive first. With the development of computers, auto gearbox, as an important part of automotive transmission system, has experienced three periods: manual transmission, automatic transmission, and automatic / manual transmission. The paper is aimed at the manual gearbox design of the cars with Front engine Rear wheel drive(FR).On the axle load distribution, FR can reach the optimum ratio of 50:50,for it has extraordinary handling, stability and braking power. Therefore, high-performance cars prefer to use FR. Besides, three-shaft gearbox is widely used in most cars due to its small size, simple principle, reliability and easy operation. The paper is based on a good learning of automotive-related theories and design knowledge. Firstly, I make an FR car manual gearbox design including gearbox transmission layout, choice of the main parameters and calculation, synchronous design, operation mechanism, structural elements, etc. Secondly, according to the parameters and requirements, I have worked out the theoretical analysis about gears, shafts an