捷达两轴手动变速器设计.docx
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1、本设计的任务是设计一台10款捷达两轴手动变速器。与中间轴式变速器比 较,两轴式变速器有结构简单、轮廓尺寸小、布置方便、中间档位传动效率高 和噪声低等优点。根据轿车的外形、轮距、轴距、最小离地间隙、最小转弯半径、车辆重量、 满载重量以及最高车速等参数结合自己选择的适合于该轿车的发动机型号可以 得出发动机的最大功率、最大扭矩、排量等重要的参数。再结合某些轿车的基 本参数,选择适当的主减速比。根据上述参数,再结合汽车设计、汽车理论、 机械设计等相关知识,计算出相关的变速器参数并论证设计的合理性。它功用是:改变传动比,扩大驱动轮转矩和转速的变化范围,以适应经常 变化的行驶条件,如起步、加速、上坡等,同
2、时使发动机在有利的工况下工作; 在发动机旋转方向不变的前提下,使汽车能倒退行驶;利用空档,中断动力 传递,以使发动机能够起动、怠速,并便于发动机换档或进行动力输出。这台变 速器具有五个前进档(包括一个超速档五档)和一个倒档,并通过锁环式同步器 来实现换档。关键词:变速器,锁环式同步器,传动比,中间轴,第二轴,齿轮ABSTRACTThe duty of this design is to design a FR type manual transmission used in the saloon, It s the countershaft-type transmission gearbox.
3、 This transmission has two prominent merits:Firstly,the transmission efficiency of the direct drive keeps off high, the attrition and the noise are also slightest;Secondly ,it S allowed to obtain in the biger gear ratio of the first gear when the center distance is smaller.According to the contour,t
4、rack, wheel base, the smallest ground clearance,the smallest turning radium,the vehicles weight, the all-up weight as well as the highest speed and so on, union the choosing engine model we can obtain the important parameters of the max power,the max torque, the displacement and so on. According to
5、the basic parameters of the certain saloon, choose the suitable final drive ratio. According to the above parameters,combining the knowledge of automobile design, automobile theory, machine design and so on, calculate the correlated parameters of the gearbox and proof the rationality of the design.I
6、ts function is:Changing gear ratio,expanding the torque of the driving wheel and the range of the rotational speed,to adapt the travel condition which frequently changes, like start, acceleration, climbing and so on, simultaneously causes the engine to work under the advantageous operating mode;Unde
7、r the premise of the invariable rotation, enables the automobile to travel back; (S)Using neutral, severances the power transmission, to make the engine start, idle, and is advantageous for the engine to shift gears or to carry on the dynamic output. This gearbox has five (including over drive一fifth
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- 捷达 手动 变速器 设计
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