目录
摘要... .................................................................................................... (V)
关键词... ................................................................................................. .V 前言... .................................................................................................... .Ⅵ第一章变速箱的功用、要求和类型... ............................... .. 1
1.1变速箱的功用... ....................................................................... . 1
1.2对变速箱的要求... ................................................................. .. 1
1.3变速箱的类型... ....................................................................... . 1 第二章变速箱的传动方案... .................................................... (2)
2.1变速箱类型选择及传动方案设计.................................. . 3
2.1.1类型选择... ........................................................................... . 3
2.1.2倒档的形式及布置方案... ................................................... . 3
2.2传动简图方案设计的一般原则... .................................. (5)
2.3变速箱操纵机构方案分析... ............................................ (5)
2.3.1变速箱操纵机构的功用... ................................................... . 5
2.3.2变速箱操纵机构应该满足如下要求... ............................. .. 6
2.3.3操纵机构组成... .................................................................. .. 6
2.4变速箱传动方案的设计..................................................... .. 6
2.4.1整体总布置... ..................................................................... (6)
2.4.2驾驶员的使用习惯... ......................................................... (6)
2.4.3提高平均传动效率... ......................................................... (7)
2.4.4改善齿轮受载状况... ......................................................... (7)
2.4.5传动方案... ........................................................................... . 7 第三章变速箱设计计算... ....................................................... . 10
3.1变速箱主要参数的选择.................................................. (10)
3.1.1发动机参数选择... ............................................................. .. 10
3.1.2档位数的确定... ................................................................ (10)
3.1.3各档位传动比的确定... .................................................... (10)
3.1.4轴的直径... ......................................................................... .. 11
3.1.5中心矩 A... ........................................................................ (12)
3.1.6齿轮参数选择... ................................................................ (12)
3.1.7齿轮的强度校核... ............................................................. .. 19
3.2 变速箱轴的设计计算... ....................................................... .. 24
3.2.1轴的功用及设计要求... .................................................... (24)
3.2.2轴尺寸初选... ...................................................................... . 24
3.2.3轴的结构形状... ................................................................ (25)
3.2.4轴的受力分析... ................................................................ (26)
3.2.5轴的校核... ......................................................................... .. 26
3.2.6第一轴的强度与刚度校核... .............................................. . 27
3.2.7第二轴的强度与刚度校核... .............................................. . 28
3.2.8轴上花键的设计计算... .................................................... (30)
3.3 变速箱轴承的选择... ........................................................... (31)
3.3.1几种轴承的特点... ............................................................. .. 31
3.3.2类型的选择... ...................................................................... . 32
3.4 啮合套的设计... ...................................................................... .. 33 第四章变速箱的拆装顺序... ................................................... .. 35
4.1变速箱的装配顺序... ............................................................ ..35
4.2变速箱的拆卸... ..................................................................... .. 36
4.3变速箱总成装配应注意的问题... .................................... .. 36 第五章离合器分析... .................................................................... . 37
发动机转速5.1离合器的基本组成和分类... ............................................. . 37
5.2 离合器的功用... .................................................................... . 37
5.3 汽车离合器设计的基本要求... ...................................... (37)
第六章摩擦离合器基本结构尺寸、参数的选择... ...... .. 38
6.1 摩擦片外径及其它尺寸的确定... .................................. .. 38
6.1.1 摩擦片外径 D ... ................................................................ ..38
6.1.2 摩擦片内径 d ... ................................................................. .. 39
6.1.3 摩擦片厚度 h ... ................................................................. (40)
6.1.4 校核离合器所选尺寸... ................................................... (40)
第七章离合器零件的结构选型及设计计算... ............... (41)
7.1从动盘总成... ........................................................................ .. 41
7.1.1从动片... ............................................................................ (42)
7.1.2从动盘毂... ......................................................................... .. 42
7.2压盘和离合器盖... ............................................................... .. 44
7.2.1 压盘设计... .......................................................................... . 44
7.2.2 离合器盖设计... ................................................................. .. 46
7.3离合器分离装置的设计... ................................................ (47)
7.3.1 分离杆... ............................................................................. .. 47
7.3.2 分离轴承及分离套筒... ..................................................... .. 49
7.4圆柱螺旋弹簧设计... ......................................................... (50)
7.4.1 结构设计要点... ................................................................. .. 50
7.4.2 弹簧的材料及许用应力... .................................................. . 50
7.4.3 弹簧的计算... .................................................................... (51)
7.4.4 离合器的操纵机构... ........................................................ (54)
结论... ..................................................................................................... . 56 参考文献... ......................................................................................... (56)
致谢... . (57)
摘要：本次设计是在对轮式挖掘机的离合器及变速箱进行分析与研究的基础上，通过对离合器及变速箱的工作原理、性能参数、构造及制造工艺进行分析与对比，设计出更好更能满足现今工程生产需要的轮式挖掘机的离合器及变速箱。根据轮式挖掘机的使用特点及要求本次设计采用了和普通汽车类似的离合器及变速箱，目的是借用标准汽车的零部件，降低制造成本，维修也更方便。然后在设计的过程中对变速箱的档位数与传动比、档位的布置、换档方式以及离合器的从动盘、压盘、分离装置等进行了结构的优化设计，在满足使用要求的前提下尽量地简化了机械结构，从而在降低了成本
的同时，降低了挖掘机操纵员的工作强度，还满足了对轮式挖掘机工作效率、安全性、稳定性及成本等的要求。关键词：轮式挖掘机变速箱离合器从动盘。
Abstract:This design is on the clutch and gearbox wheeled excavator research and analysis on the basis of clutch, through the working principle, and the gearbox performance parameters, structure and the manufacturing process analysis and comparison, more can satisfy the design better production need now engineering wheeled excavator clutch and transmission. According to the use of wheeled excavator characteristics and requirements of this design USES a and ordinary cars similar clutch and transmission, the purpose is to borrow standard components, reduce automobile manufacturing costs, repair more convenient also. Then in design process on the number and transmission ratio of gear transmission, gear arrangement, shift way and clutch platen, pressure plate, separation device etc optimization design of the structure in the precondition of contented use simplified mechanical structure as possible, in order to reduce the costs at the same time, reduced the excavator working strength, manipulating member of still satisfied wheeled excavator working efficiency, safety, stability and cost requirements.
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