某轻型货车转向系统设计(含CAD零件装配图,CATIA三维图)(任务书,开题报告,论文说明书11000字,CAD图8张,CATIA三维图)
摘 要
本文针对东风某单桥轻型货车研究并设计其转向系统，并用CATIA软件进行模拟。根据轻型货车转向器的设计要求，完全可以考虑用纯机械式转向器而不涉及助力转向系统。在设计之初，根据设计要求，对四种机械式转向器进行了全面的分析，针对所选车型，考虑用到的转向器优点、缺点，结合包括成本在内的因素及其他，最后挑选齿轮齿条式转向器作为本次设计的主体。其次选择了齿轮齿条式的输入输出形式、及其结构参数,并对其进行校核。最后，根据校核过的数据进行CATIA制图、装配，再将三维图转化成为二维图。
研究结果表明：齿轮齿条式转向器适合应用于单桥轻型货车，且纯机械转向器能够满足轻型货车要求，可以不必加装助力机构。助力机构存在于转向困难的中、重型车上或者对舒适度有严格要求的乘用车上。
本文的一大特色是理论联系实际，将转向系统进入深度剖析，然后再进行设计、计算、绘图。
关键词：转向系统；齿轮齿条式；CATIA；CAD
Abstract
This paper studies and designs the steering system for a single axle light truck in Dongfeng, and simulates it with CATIA software. According to the design requirements of the light truck steering gear, it is entirely possible to consider using a purely mechanical steering without involving a power steering system. At the beginning of the design, according to the design requirements, the four mechanical steering gear for a comprehensive analysis, for the selected models, consider the use of diverter advantages, shortcomings, including the cost, including the factors and other, The rack-type steering gear is the main body of this design. Followed by the choice of rack and pinion input and output form, and its structural parameters, and its check. Finally, according to the data checked CATIA mapping, assembly, and then transform the three-dimensional map into a two-dimensional map.
The results show that the rack and pinion type steering gear is suitable for single bridge light truck, and pure mechanical steering gear can meet the requirements of light goods vehicles, you can not install the booster mechanism. The assistants are present in difficult-to-turn, heavy-duty vehicles or passenger cars with strict requirements for comfort.
This article is a major feature of the theory with practice, will turn to the system into the depth of analysis, and then the design, calculation, drawing.
Key Words：Steering system；Mechanical Type Steering Gear and Gear Rack；CATIA；CAD
目录
摘 要 I
Abstract II
第1章 绪论 1
1.1 汽车转向系概述 1
1.2 国内外转向系统概述 2
第2章机械转向系统的性能要求及参数 4
2.1 机械转向系统的结构组成 4
2.2 转向系统的性能要求 5
2.3 转向系的效率 5
2.4 传动比特性及其变化特性 7
2.5 传动间隙的确定 9
第3章转向器设计方案的选择 11
3.1 转向器类型选择 11
3.2 转向器的设计流程 11
3.2.1 齿轮齿条式转向器的结构选取 11
3.2.2 转向器的布置 12
3.2.3 车型选取及转向轮偏角计算 13
3.2.4 转向器参数选取与计算 14
3.2.5转向器材料选择 17
第4章 齿轮齿条转向器数据校核 18
4.1 齿条的强度计算 18
4.1.1 齿条受力分析 18
4.1.2 齿条齿部弯曲强度的计算 19
4.2 齿轮的强度校核 19
4.2.1 齿面接触疲劳强度校核 19
4.2.2 齿轮齿根弯曲疲劳强度计算 21
第5章 CATIA模型建立 23
第6章 总结 26
参考文献 27
致 谢 28
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