轿车机械式变速器设计
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- 轿车机械式变速器设计Transmission to change the engine reached on the driving wheel torque and speed, is aimed at marking start, climbing, turning, accelerate various driving conditions, the car was different traction and speed Meanwhile engine in the most favorable working conditions within the scope of the work. And the trans mission in neutral gear with reverse gear. Transmission also need power output function.Gearbox because of the low-grade work at a larger role, In general, the low-grade gearbox layout are close to the axis after support, Following from low-grade to high-grade order of the layout of stalls gear. This will not only allow axis are large enough for a rigid, but also ensures easy assembly. Gear box overall structure and rigid axle and the shell structure of relations. Generally through the control shaft length control over several stalls to ensure that adequate gear box rigid. This paper describes the design of three-axis five block manual trans mission, the transmission principle of work elaborated, Transmission of the gear shaft and do a detailed design, and the intensity of a school. For some standard parts for the selection. Transmission Trans mission program design. A brief description of the trans mission of all components of the material choice.
Keywords : transmission；Transmission ratio；mechanical；Tooth from；
目 录
摘 要 I
Abstract II
1 绪论 1
1.1 选题背景及意义 1
1.2 汽车参数的选择 1
1.3 变速器设计应满足的基本要求 2
2 变速器传动机构布置方案 3
2.1 传动机构布置方案分析 3
2.1.1 固定轴式变速器 3
2.1.2 倒挡布置方案 3
3 零部件结构方案分析 5
3.1 齿轮形式 5
3.2 换挡机构形式 5
3.3 变速器轴承 6
4 变速器设计和计算 8
4.1 挡数 8
4.2 传动比范围 8
4.3 中心距A 8
4.4 外形尺寸 9
4.5 轴的直径 9
4.6 齿轮参数 9
4.6.1 模数的选取 9
4.6.2 压力角 10
4.6.3 螺旋角 10
4.6.4 齿宽b 11
4.7 各挡齿轮齿数的分配 12
4.7.1 确定一挡齿轮的齿数 12
4.7.2 对中心距进行修正 13
4.7.3 确定常啮合传动齿轮副的齿数 13
4.7.4 确定其他各挡的齿数 14
4.7.5 确定倒挡齿轮齿数 14
5 变速器的校核 16
5.1 齿轮的损坏形式 16
5.2 齿轮弯曲强度计算 16
5.3 轮齿接触应力计算 18
5.4 轴的强度计算 19
6 同步器的选型 22
6.1 锁销式同步器 23
6.1.1 锁销式同步器结构 23
6.1.2 锁销式同步器工作原理 23
6.2 锁环式同步器 24
6.2.1 锁环式同步器结构 24
6.2.2 锁环式同步器工作原理 25
6.2.3 锁环式同步器主要尺寸的确定 25
结论 28
致 谢 29
参考文献 30
附 录 31
附录 外文文献 32
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