汽车发动机取力器的研发[毕业设计论文].rar

摘    要


本文设计了一种汽车发动机取力器，这种取力器由于其特有的优点而应用广泛。随着改革开放的深入，中国社会经济和交通环境有了明显的改善，各行业对专用汽车尤其是重型专用汽车的需求越来越大。重型自卸车、散装水泥车、混凝土搅拌车、高空作业车、消防车、洒水车、市政用车、油田专用车等重型专用汽车将更加受到用户的青睐。而这些专用汽车大多装有一个重要的零件，就是取力器，目前市场上的专用汽车的种类十分繁多，所以对应的取力器的种类也很多，安装方法和位置也是各有不同，性能也参差不齐。因此，设计一种容易操作、性能优越的取力器成为了一种必要。本文所研究的是一种发动机取力器，它的优点是结构紧凑，持续工作时间篅@ぃ皇芷道牒掀鞯母扇牛灰⒍ぷ鳎宦劾牒掀鞔τ诤沃止ぷ髯刺×ζ鞫寄苷９ぷ鳌Ｒ虼朔⒍×ζ鞯难蟹⒂凶胖匾囊庖濉Ｔ诒敬紊杓乒讨校髡呋嬷屏俗茏巴肌⒉孔巴己椭匾慵迹⑶易隽讼嘤Φ男：思扑悖岢隽松杓品桨浮�




关键词：取力器，齿轮，离合器，液压


ABSTRACT

  This paper designed a kind of power take-off of automobile,this kind of power take-off is extensively used because of its special advantage.With the policy of reform and opening-up,the Chinese social economy and the transportation environment had an obvious improvement.Special automobile is needed everywhere,and the quantity needed is larger and larger.Special automobile like heavy type self-discharging wagon,bulky cargo cement car,concrete mixer truck,overhead working truck,fire engine,sprinkler truck,city truck,the oil-field special truck etc. will be more welcomed by the customers.Amost all of these special automobiles have an important accessory, the power take-off. The category of the special automobiles in the market is very numerous currently, so the category of the power take-offs are also numerous. The ways of installment of these power take-offs are all different and the positions where they will be fixed are also different,so the performance of these power take-off are all different.Therefore,to design a kind of power take-off with high quality and easy to operate is necessary.What this paper study is a kind of engine power take-off.Its advantage is the tightly packed structure,long time to keep on working, and it is free from the interference of the automobile clutch.As long as the machine is working, in spite of the clutch is coalesced or not,the power take-off can work normally.The development of engine power take-off has outstanding significance.In the process of designing,the author made the general assembly drawing,part assembly drawing,and some important part drawing,and the author also did some corresponding checking analysis,made out the designing project.




Key words：Power Take-off, Geer, Clutch, Hydraulic Pressure


 


 


 




 

目    录




中文摘要 Ⅰ

ABSTRACT Ⅱ

1 绪论 1

1.1专用汽车发展现状 1

1.2汽车发动机取力器的概况 2

2 取力装置简介 3

2.1 取力装置的功用和分类 3

2.1.1 发动机飞轮取力 3

2.1.2 离合器取力 4

2.1.3 变速器取力 5

2.1.4 分动器取力 5

2.2 取力装置的正确选择 6

3 发动机取力器传动系统的设计 8

3.1总体方案设计 9

3.1.1档位和旋向 9

3.1.2取力器功率 10

3.1.3取力器传动比和转速 10

3.2齿轮传动设计与校核 11

3.2.1 材料的选用 12

3.2.2 按齿面接触疲劳强度初步设计 12

3.2.3 验算齿面接触疲劳强度 13

3.2.4 验算齿根弯曲疲劳强度 15

3.2.5 确定齿轮的主要参数及集合尺寸 16

3.2.6 确定齿轮制造精度 17

3.3 轴与轴系零件的设计 17

3.3.1 轴材料的选择 17

3.3.2 轴的结构设计 18

3.4 键的选择与校核 21

3.5 轴承的选择 21

4 内置离合器和液压系统的设计 23

4.1 液压多片摩擦离合器的设计 23

4.1.1 多片摩擦离合器的位置布置 23

4.1.2 多片摩擦离台器的结构特点 23

4.1.3 活塞尺寸和密封环结构 23

4.1.4 离合器排油阀结构 24

4.1.5 离合器摩擦片衬面设计 27

4.2 内啮合齿轮泵的设计 29

4.3 分配器和控制阀 30

5 汽车发动机取力器的操作 32

6 结论 33

致    谢 34

参考文献 35