机械式四档变速器设计

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1、毕业设计（论文）题目：机械式四档变速器设计毕业设计（论文）要求及原始数据（资料）：1.发动机额定功率级最高转速：80KW，4800r/min;2.变速器的参数选择.（1）中心距A的选择.（2）变速器轴向尺寸，四档(3.0～3.4)A（3）轴的直径d.（4）齿轮参数.（5）各档齿轮齿数的分配.3.变速器传动简图.毕业设计（论文）主要内容：1.变速器传动系统的总体设计.2.传动系统的设计.3.轴齿轮的加工.学生应交出的设计文件（论文）：1、设计说明书一份。2、总装配图一张。（O号）3、组件图一张。（1号）4、零件图两张(手工绘制)。（2号）主要参考文献（资料）：⑴

2、李澄.机械制图.高等教育出版社出版；⑵卜炎.机械设计传动装置手册.机械工业出版社发行1998.12出版⑶邓文英.金属工艺学.高等教育出版.2000.7出版⑷沈养中.工程力学.高等教育出版社.2003.7出版⑸屠卫星.汽车底盘构造.人民交通出版社.2001.8出版⑹成大先.机械设计图图册.化学工业出版社.2000.3出版⑺张勇.电机拖动与控制.机械工业出版社.2004.6出版⑻李澄、吴天生、闻百桥.机械制图.高等教育出版社.2003.8出版⑼吴昌林、唐增宝、钟毅芳.机械设计.华中科技大学出版社2001.2出版专业班级机电工程1班学生丁伟要求设计（论文）工作起止日

3、期3月12日—6月10日指导教师签字日期教研室主任审查签字日期系主任批准签字日期毕业设计（论文）说明书目录摘要························································3Abstract····················································3变速器的简介················································41.变速器传动机构的方案分析································62.变速器零、部

4、件结构方案分析······························73.变速器操纵机构··········································81.变速器的参数选择··········································81.1一档齿轮齿数的确定····································81.2中心距A的选择········································91.3确定齿轮参数·······························

5、··········101.3.1齿宽选择·······································101.3.2压力角·········································111.3.3齿轮螺旋角32毕业设计（论文）说明书·····································111.3.4校验齿轮的接触强度·····························111.4变速器轴向尺寸·······································131.5轴的直径·····

6、········································131.6各档齿轮齿数的分配···································141.6.1确定常啮合传动齿轮副的齿数·····················141.6.2确定其他各档的齿数·····························152.变速器传动···············································162.1传动简图···········································

7、··162.2同步器（简介）········································162.2.1惯性式同步机···································182.2.2同步器工作原理·································182.2.3齿轮材料·······································192.2.4齿轮材料、热处理·······························202.2.532毕业设计（论文）说明书齿轮精度等级············

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