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机械式四档变速器设计_【汽车专业毕业论文】【答辩通过】
目录
摘要························································3
Abstract····················································3
变速器的简介················································4
1.变速器传动机构的方案分析································6
2.变速器零、部件结构方案分析······························7
3.变速器操纵机构··········································8
1.变速器的参数选择··········································8
1.1 一档齿轮齿数的确定····································8
1.2 中心距A的选择········································9
1.3 确定齿轮参数·········································10
1.3.1 齿宽选择·······································10
1.3.2 压力角·········································11
1.3.3 齿轮螺旋角·····································11
1.3.4 校验齿轮的接触强度·····························11
1.4 变速器轴向尺寸·······································13
1.5 轴的直径·············································13
1.6 各档齿轮齿数的分配···································14
1.6.1 确定常啮合传动齿轮副的齿数·····················14
1.6.2 确定其他各档的齿数·····························15
2.变速器传动···············································16
2.1 传动简图·············································16
2.2 同步器（简介）········································16
2.2.1 惯性式同步机···································18
2.2.2 同步器工作原理·································18
2.2.3 齿轮材料·······································19
2.2.4 齿轮材料、热处理·······························20
2.2.5 齿轮精度等级···································20
3.故障诊断与检修···········································21
3.1 常见故障与检修·······································21
3.1.1 变速器的异常声响·······························21
3.1.2 变速器跳档·····································22
3.1.3 挂档困难·······································22
3.1.4 变速器乱档·····································23
3.1.5 变速器发热·····································23
3.1.6 变速器漏油·····································24
3.2 变速器零件的检修·····································24
3.2.1 齿轮与花键的检修·······························24
3.2.2 轴的检修···········
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