( 毕 业 设 计 ) 驱 动 桥 _ 变 速 器 _ 同 步 器 _ 齿 轮_ 取 力 器摘 要变速器用来改变发动机传到驱动轮上的转矩和转速，目的是在原地起步、爬坡、转弯、加速等各种行驶工况下，使汽车获得不同的牵引力和速度，同时使发动机在最有利的工况围工作。所以变速器的结构设计的合理性直接影响到汽车动力性和经济性。设计要求达到换挡迅速、省力、方便、有较高的工作效率、工作噪声低。因此变速器在汽车中得到广泛应用。本次设计的是五个前进档加一个倒档的中型专用车的变速器。为了使该变速器应用围更加的广泛，应用到不同工程上，使得本变速器带有取力器。变速器采纳中间轴式, 换档形式采纳的是同步器和滑移齿轮换档，使的换档方便，可靠。操纵机构设有自锁和互锁装置。先利用已知参数确定各挡传动比，再后确定齿轮的模数、压力角、齿宽等参数。由中心矩确定箱体的长度、高度和中间轴与二轴的轴径，然后对中间轴和各挡齿轮进行校核。在设计过程中，利用CAXA 绘图，运用MATALAB 软件编程。最后绘制装配图与零件图。通过本次设计，使所设计的变速器工作可靠，传动效率更高。关键词：变速器，同步器，齿轮，取力器AbstractTo change the engine used to spread transmission of torque and wheel speed, the aim of starting in place, climb, turn and accelerate a variety of driving conditions, different vehicle traction and speed, while the engine in the most favorable range conditions.Therefore, the reasonability of the structure design of a transmission gearbox directly affects the vehicle's dynamic performance. It is usually required shifting gears rapidly and conveniently, saving force, and having a higher working efficiency and low working noises.The design of the five forward file plus a reverse of the transmission medium-sized special vehicle. In order to make the transmission more broad range of applications, application to a different project, make a check of the power transmission device. Transmission use of the middle axis, shifting the form of using the synchronizer gear shift and sliding to m...
