黑龙江工程学院本科生毕业设计
结 论
本文是根据本田WH125-6型发动机的一些主要技术参数来设计。变速器在动力总成中起到关键的作用，在设计变速器的设计过程中，主要的研究内容如下：变速器传动机构布置方案的确定；变速器主要参数的选择；变速器齿轮、轴、轴承的计算和校核；离合器和操纵机构及箱体的设计等。
经过一系列的改制设计，在原车的基础上做改动，已经大致的能把动力总成的质量减轻10%，其过程为，在原有四档的基础之上，把多余的3.4档位去掉，换挡拨叉，去掉一个，原箱体的材料为铸铁，通过设计在保证刚度的前提下用铸铝代替原有材料。设计新的齿轮，齿轮轴，飞轮。离合器的改制。完成了预期的效果。
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黑龙江工程学院本科生毕业设计
参考文献
[1]刘惟信.汽车设计[M].清华大学出版社，2001.(7)
[2]臧杰，阎岩.汽车构造[M].北京：机械工业出版社，2006.(7) [3]王望予.汽车设计（第4版）[M].北京：机械工业出版社，2007.(9) [4]余志生.汽车理论（第4版）[M].北京：机械工业出版社，2008.(1)
[5]王宝玺，贾庆祥.汽车制造工艺学（第3版）[M].北京：机械工业出版社，2008.(1) [6]杨可桢，程光蕴，李仲生.机械设计基础（第五版）[M].北京：高等教育出版社，2006.(5)
[7]殷玉枫.机械设计课程设计[M].北京：机械工业出版社，2006.(6) [8] 赵志军．汽车节油途径及节能技术的探讨[J]. 应用能源技术,2010,(8). [9] 朱敏慧．应对未来汽车设计的挑战[J]. 汽车与配件,2010,
[10] 王桂姣，周建美．节能车车架选型和轻量化设计[J]. 汽车科技,2008,(5). [11] 杨忠敏.汽车的发展与未来[M].北京：化学工业出版社，2004. [12] 陈力禾.轻量化设计-计算基础与构件结构[M].机械工业出版社，2010 [13] 杨沿平 唐杰. 中国汽车节能思考[M].机械工业出版社，2010. [14]徐 兀.汽车发动机现代设计[M].北京：人民交通出版社，2007． [15]杨连生.内燃机设计[M].北京：中国农业机械出版社.1981． [16]陆际青.汽车发动机设计[M].北京：清华大学出版社.1990． [17]周龙保.内燃机学[M].北京：机械工业出版社.2005．
[18] Yasushi YABE,et al.Using CAE to Promote More Efficient Development
of Automatic Transmissions[J].Jatco Technical Review 2006(7):60-65 [19] Kazunari Nagai,et al.Development of NEW 6-spees Manual Transaxle for
FWD passenger Vehicles[J].State of art Technologies of power Transmissions,2008(2);27-32
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黑龙江工程学院本科生毕业设计
致 谢
大学四年匆匆走过，回想起这四年里的点点滴滴，让我难以忘怀，在此分别之际请让我感谢下我学习、生活四年的母校—黑龙江工程学院，感谢我们的汽车与交通工程学院。
在本次设计过程中，由于缺少实际的工作经验，设计过程只是根据一般步骤完成的，具体的细节部分考虑不周，这些原因都造成了所设计的变速器离实际应用还有很大的距离，需要自己在以后的学习和工作中不断提高。总结此次毕业设计，我受益匪浅，首先是变速器相关零部件设计与选用以及绘图方面我的进步很大，可以独立设计变速器相关的部件了。其次，从崔宏耀老师的指导过程中我学到了他对工作的认真负责的精神，为我以后的工作打下良好的基础。祝愿我们的学校越办越好！
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黑龙江工程学院本科生毕业设计
附录A
The significance of lightweight
Automotive lightweight main guiding principle: to ensure stability on basis of improved performance, energy-saving design of the assembly partscontinuous optimization model spectrum.
The lightweight car, the car is to ensure strength and security of the premise, as far as possible to reduce the car's curb weight, thereby enhancing the car's power, reducing fuel consumption and reduce exhaust pollution. Experiments show that if 10% of automobile weight reduction, fuel efficiency can bincreased by 6% -8%; vehicle curb weight is reduced by 100 kg hundred kilometers can be reduced 0.3-0.6 liters; 1% of vehicle weight reduction, fuel consumption can be reduced 0.7 %. At present, due to the need for environmental protection and energy saving, lightweight car has become the world trend of automobile development.
Lightweight car is the main way:
① mainstream car models continue to optimize the size, specification size to retain the main parameters of the premise, to enhance the structural strength of the vehicle, reducing the amount of supplies;
② use of lightweight materials. Such as aluminum, magnesium, ceramic, plastic, fiberglass or carbon fiber composite materials;
③ The computer design. Such as finite element analysis, local reinforcement design; ④ the use of load-bearing body, thinning the thickness of the body sheet metal.
Among them, the current major automotive lightweight measures mainly the use of lightweight materials. for automotive lightweight design of the metal material
The main vehicle through the car's lightweight materials to improve economy to contribute. Theoretical analysis and experimental results show thlightweight is to improve vehicle fuel economy and effective way. In order to equirements of lightweight vehicles, some new material emerged and expanded the scope of application. Nonferrous Alloys
To passenger cars, the 1973 vehicle used by the non-ferrous alloy of the total timber weight ratio of 5.0% in 1980 to 5.6%, while in 1997 it reachNon-ferrous alloys in automotive applications is the rapid growth trend of development of automotive materials. Aluminum
Steel aluminum density of about 1 / 3 is the most widely used lightmaterials. United States production of automotive products, for example, aluminum alloy 1976 per vehicle is only 39kg, 1982 reached 62kg, while in 1998 it reach100kg. (1) cast aluminum alloy
Many elements can be used as cast aluminum alloy elements, only Si, Cu, Mg, Mn, Zn, Li in the mass production of great significance. Of course, widely used in the car is not the
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