文档介绍：毕业设计(论文)
题目:汽车齿轮变速器设计及PRO/E建模(设计部分)
English Title:Automobile gear transmission design and PRO/E
modeling (Design)
二零一二年六月二日
目录
绪论 5
1. 变速器结构方案的选择 7
. 两轴式和三轴式变速器 7
. 齿轮安排 8
. 换档结构形式 9
2. 变速器主要参数的确定 10
. 传动比的计算 10
. 轴向尺寸 12
. 齿轮参数 12
. 各档齿轮齿数的选择 14
. 变速器齿轮的强度计算与材料的选择 17
. 轴的设计 27
. 变速器壳体和盖的设计 32
总结 33
致谢 34
参考文献 35
摘要
变速器是用来协调发动机的转速和汽车速度的变速装置,是汽车最重要部件之一,其中机械式变速器运用广泛,技术成熟,而且动力传输效率高。本设计以现有桑塔纳车型为例,进行三轴五档机械式变速器的设计,介绍了在汽车正常行驶状态下,变速器的整体构造,各部分零件应满足的要求和各档位的分布情况。变速器由输入轴(动力输入轴)、输出轴(动力输出轴)和中间轴三轴组成,各档位有从动齿轮和主动齿轮,同时为保障换挡的可靠性,还需要同步器。设计对三轴的材料、刚度和强度等数据计算,同时重点介绍了变速器的档位在其需求的传动比下,对各档位齿轮的齿型选择以及材料、齿数和齿宽等数据要求的计算,并且根据实际情况进行校验各轴与齿轮以满足变速器实际应用的要求。
关键词:变速器; 轴; 档位; 齿轮。
ABSTRACT
Transmission is used to coordinate engine speed and vehicle speed transmission device,the most important parts of a car, in which extensive use of mechanical transmission, technical maturity, and the power transmission efficiency. The design of the existing Santana models, three-axis and five-speed mechanical transmission design,introduced in the car driving condition, the overall transmission structure, shall meet the requirements of some of the parts and the distribution of stalls . Transmission from the first shaft (input shaft), the second shaft (PTO) and the intermediate shaft posed of a driven gear while the reliability for the protection of the shift, but also synchronizer . The axis of the material design, the stiffness and strength data calculation, while highlighting the transmission gear in its demand, the gear teeth of each gear type selection and materials, teeth, width the number of such data calculations required, and the actual situation of the transmission shaft and gear to meet the requirements of practical application.
Key words:Transmission ; gear ; file ;shaft .
绪论
现代汽车的动力装置,几乎都采用柱复活塞式内燃机。它具有体积小,质量轻,工作可靠,使用方便等优点。但其性能与汽车的动力性和经济性之间存在着较大的矛盾。
大家知道,汽车需要克服作用在它上面的阻力,才能起步和正常的行驶。即使在平坦的柏油路上,汽车以低速等速直线行驶,%的滚动阻力。若发动机和车轮直接相连,则对应于该转速所换算的