CA1170载货汽车变速器设计

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CA1170载货汽车变速器设计

中文摘要
汽车自19世纪末诞生至今100余年间，以惊人速度发展，至今已成为陆
地上活动范围最大，运输量最大的交通工具。商用车作为汽车家族中重要的-员，近年来，以其强劲的发展势头，在现代交通运输夜中占据着不可替代的地位。重型货车作为-种重要的商用车，为货物运输提供了很大的方便。
变速器作为汽车传动系统中重要的部件，它的性能直接影响到汽车的动力
性，经济性等。本文主要阐述了重型货车变速器的设计过程，主要包括四部分，即：绪言部分、设计部分、工艺部分、结束与部分。
绪言部分：叙述变速器的功能、设计要求和。
设计部分：对比变速器的各种结构方案，说明变速器各主要参数的确定过
程，齿轮的参数和校核过程，轴的结构和校核过程，轴承的选用原则和校核过程，同步器的选用方法，同时设计并分析操纵机构，画出各主要零件的工程图及变速器的装配图，计算过程用matlab编程来计算，主要包括齿轮的强度校核程序，轴的强度和刚度校核程序。
工艺部分：机械加工工艺是实现产品设计，组织生产，加工操作，的重要
依据。本文的工艺部分主要对产品的典型零件的工艺过程进行了分析，包括轴类零件，齿轮类零件，壳体类零件，拨叉类零件及其他类零件，并选取有代表性的零件，确定了各类零件的材料，制定了工艺过程卡片。另外，对装配过程也作了详细的说明。
结束与部分：对此次设计做简明扼要的总结。
关键字: 手动变速器，齿轮，轴，同步器，工艺，程序


目录
-、 绪言 ··································································
1.变速器的功用与设计要求 ··························
2.毕业设计任务 ··············································
二、变速器结构方案的选择 ····································
1.传动系统布置方案分析 ······························
1.1 两轴式变速器与中间轴是变速器 ·····
1.2 倒档布置方案 ·····································
2. 零部件结构方案分析 ································
2.1齿轮形式 ··············································
2.2换到式 ··············································
3. 自动脱挡 ·····················································
4. 变速器的轴承 ·············································
5. 变速器的操纵机构 ····································
三、变速器主要参数的选择 ····································
1. 挡数 ·······························································
2. 各挡位传动比 ···············································
3. 中心距的确定 ···············································
4. 外形尺寸 ·······················································
5. 齿轮参数 ·······················································
5.1 模数 ·····················································
5.2压力角 、螺旋角β、齿宽b的选取
5.3齿轮变为系数的选取 ··························
6. 各挡齿轮齿数的分配 ···································
7. 齿轮几何尺寸 ··············································
四、变速器零件的校核 ············································
1.齿轮的校核 ····················································
2.轴的强度和刚度校核 ·························
2.1轴的初步设计 ··························
2.2轴的强度验算 ··························
3.轴上花键的校核 ·································
4.轴承的校核 ·········································
五、变速器结构元件的设计 ·························
1. 同步器的设计 ···································
1.1 同步器尺寸的确定 ·················
1.2 同步器摩擦副材料的确定 ·····
2. 变速器操纵机构的设计 ···················
3. 变速器齿轮的材料与工艺 ···············
4. 变速器轴的设计 ·······························
5. 变速器壳体 ·······································
六、工艺性分析 ·············································
1. 壳体加工工艺 ···································
2. 拨叉加工工艺 ···································
3. 齿轮的加工工艺 ·······························
4. 轴的加工工艺 ···································
七、结论 ·························································
八、英文翻译 ·················································
致谢 ·································································
参考资料 ·························································