全套图纸1993168580
参考文献
[1]明平顺.汽车运输专用车辆[M]. 北京：人民交通出版社，2006,12. [2]雷琼红.自卸车三角臂的工艺分析及改进[J].专用汽车,2006,7. [3]黄天泽.汽车车身结构与设计[M].北京：机械工业出版社，2000,8. [4]赵晶,罗爱民.自卸车定式锁启机构的设计[J].专用汽车,2003, 4：12-13. [5]王柱江.自卸汽车最大举升角的确定[J].专用汽车,1999, 2：13-14. [6]白海英,刘德仁.自卸汽车举升机构的受力分析[J].建筑机械,2005, 5：15-1. [7]鲍际辉.自卸车举升机构设计计算[J]. 专用汽车,2005,1. [8]余仁义.梁涛.自卸汽车倾卸机构的设计[J].专用汽车,2003,2. [9]尹雄武.轻型自卸车举升机构的优化设计[J]. 专用汽车,2003,5. [10]刘伟.轻型自卸车举升机构的设计[J].陕西汽车,2001, 2. [11]李芝.液压传动[M]. 北京：机械工业出版社,2003,10.
[12]杨耀东.张文明,董翠艳.自卸汽车液压系统设计[J].矿山机械,2003,8. [13]高健. 机械优化设计基础[M].北京: 科学出版社, 2000,7. [14]蒋崇贤.专用汽车设计[M] .武汉:武汉工业大学出版社,2002,5. [15]郑文纬, 吴克坚.机械原理[M].北京:高等教育出版社, 2004,4.
[16]徐达,蒋崇贤.专用汽车结构与设计[M] .北京: 北京理工大学出版社, 1998,8. [17]Martin W.Stockel,Martin T.Stockel.Auto Fundamentals[R].U.S.A：Goodheart
Wilcox Company,2003：102-110.
[18]Prince Arthas. The Design of Dump Trucks[R].Germany：BMW Co.Ltd,2004：6
7-89.
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全套图纸1993168580
致 谢
至此，为期一个学期的毕业设计就要结束了，同时也给自己的大学生活画上一个句号。这次毕业设计可以说对自己大学这几年所学知识进行的一个全面的回顾和复习，这其中也发现了自己的不足和欠缺之处，虽然今后像大学这样系统的学习机会还会有很多，但是能够通过毕业设计发现自己不足之处，能够再一次全面系统的学习一次大学知识，尤其是那些与汽车专业息息相关的内容，将会对自己起到很大的帮助。
通过这么长时间的锻炼和学习，使自己学到了很多在课堂上不曾学到的知识和经验，这也是在踏上研究生学习之路以前对自己能力的一个检验。
轻型农用自卸车厢和举升机构的设计完成了，但是能否真正符合实际性能要求，还得需要进行实际的检验。由于本人能力和经验的有限，可能会与实际的需要情况出现较大的偏差，但是毕业设计目的不在于实际的应用，而是在于通过这次设计达到锻炼自己独立完成任务的目的。
在这次的毕业设计过程中得到了指导老师韩春强的大力支持，在此表示深深的敬意和衷心的感谢。对本人设计时所引用到的各种期刊文献的作者表示由衷的谢意。也感谢汽车工程系的各级领导和车辆工程教研室的各位老师，在毕业设计期间他们给了本人莫大的帮助。
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黑龙江工程学院本科生毕业设计
附 录
附录A英文原文
A Brief Description of Lift Truck System Design
Martin W.Crouse
Abstract： In this paper, dump truck through a brief design analysis, in view of the
length of the larger features of heavy-duty dump truck, lifting the system from node Structure design and hydraulic design of the corresponding measures for the lifting of heavy truck design a certain guiding function.
Key words： heavy-duty；lifting；system 1. The main structure of dump truck
Dump truck, including the structure of the main lift system, chassis, frame, vice,component compartments,
2. lifting body design and analysis
Heavy-duty dump truck lifting system in the design process of the main issues that need to be addressed include: lifting forms of selection, in the lift car in the process of stability, before and after the bridge, the reasonableness of axle-load distribution and hydraulic system reliability. Chassis by following the design of 7.2 meters on concrete examples of the dump truck, dump truck lifting mechanism on the general idea of system design.
2.1 Compartment volume to determine initial
Chassis in accordance with the parameters: Wheelbase 3900mm +1350 mm, rear overhang 900mm, set the quality of 17500kg, and the whole 1600mm rear overhang for the request to determine car-size 5600mm * 2300mm * 1500mm. Determine the initial car position in the chassis for the car back out of the back-end chassis frame870mm. In determining the form of lifting, the need for further analysis of Count before and after the bridge and axle-load distribution of the car to verify the location of the vehicle in the second category is reasonable. 2.2 determine the form of lifting
Lift truck used mainly in the form of F-type, T-style, front-straight top form. In
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黑龙江工程学院本科生毕业设计
F-type, T-style, front-straight top three identified in the form of lifting one of the most suitable, we need three conditions on the analysis of calibration. Lift the form of the three has its own advantages and disadvantages of pre-straight-top compact structure, lifting and high efficiency. Simple process with low costs. However, after lifting the stability of poor road conditions on the higher; F-type and T-type lifting mechanism a good degree of cross-cutting steel, smooth lifting smooth rotation, the fuel tank of the work piston short trip, but the lift coefficient than the Great.
In order to determine whether the choice of what kind of lifting the most appropriate form, the author of three cases were done on the theoretical analysis. If the selected F-type and T-type lifting form, the most important of its calculated lift coefficient comparison. By calculating the F-type forms of lifting lifting the smallest coefficient is 1.751, T-type lifting the smallest form of lift force coefficient is 1.799, it is not ideal (usually lift coefficient of 1.6 to 1.7 when the effect of better). The front straight top edge lifting the fuel tank T is greater than 8 tons of it. Taking into account the use of F-type or T-type lifting mechanism, very easy lifting, lifting the need for large tanks, but also to the triangular arm, such as demanding and difficult to achieve. Combination of the foregoing analysis, decided to adopt the prefix form of straight Lift top.
Lifting measures to improve the stability of 2.3 Due to the design of the length of the larger car, at the same time, the use of pre-straight lifting top form, so the stability of car is very important, need to take measures to improve the process of lifting carriage vehicle stability, prevent the occurrence of vehicle rollover. Dump Truck car normally used to connect the design of hinge axis and sub-frame connection, the Deputy frame through the U-bolts and connect the main frame structure. The design we have adopted a new structure, flat steel, through welding at the side of fixed with bolts on the main frame, thus greatly reducing the vehicle's center of gravity to increase stability. As the car through the hinge axis and the hinge axis to achieve the lifting Block rotation, hinge axis blocks now have a high degree of flat steel to replace the Vice-trailers will need to install seat hinge axis frame in the main beam on the wing surface below the main Frame back-end need to install a Z-shaped beams to support Block after the hinge axis, Z-shaped beam through the bolt assembly back-end fixed in the frame, while the two-axis hinge as much as possible the distance between blocks to increase to increase the car example or stability. Due to the length
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黑龙江工程学院本科生毕业设计
of the larger car, the design would have to consider the stability of devices used to increase vehicle stability, the stability of the central unit installed on the inside of the location of the former side. Car safety design in the frame around pole between the longeron, the form of simple, safe, reliable, easy to operate. After taking into account the lifting carriage, Block Department hinge axis force is very large, and therefore hinge axis in the Block Office, to strengthen measures to be adopted to increase the hinge axis of the support seat edge.
3. Hydraulic Lift System Design
Pre-straight top-style, including the dumping of hydraulic gear pumps,hydraulic cylinder, control valve lift, valve lift, hydraulic tanks, piping, lifting mechanism. Hydraulic system we use an advanced three-loop system. Hydraulic control system schematics,. The dump truck in the three-loop system, the oil will flow to the fuel tank through the valve assembly to return to the only circuit in the oil return to tank, the pump will help to guide the valve through a separate oil circuit only be used as a return circuit, because in most excellent circuit design, the return will be installed in circuit capacity 100gpm use filters to filter the dirt to enter the pump to extend the use of pump parts life. Three-loop system, the main advantages are: to ensure that clean oil will always supply pumps, and not when the dump truck in the position or to maintain only the reliance on the oil pump in the internal volume rotation. 3.1 The main components to choose
Hydraulic system is mainly used hiwassee systems, hydraulic cylinder hiwassee selected multi-level cylinder sleeve.
3.2 hydraulic cylinder installation to determine the location
The installation of hydraulic cylinder straight-top car and the driver's request there is enough room between that having studied the arrangement of second-class chassis, the cab behind the need to move the location of muffler. The abolition of the Vice-frame, hydraulic oil tanks need to install a beam in the main frame between the two, using the hole on the main frame, the design of the installation of a hydraulic cylinder assembly seat. Block with bolts installed in the main frame about a fixed beam, the hydraulic cylinder support shaft and then installed in the installation of seat, hydraulic cylinder brackets before the board in the car.
4. Concluding remarks
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