重型车转向系设计(含CAD零件图装配图)

重型车转向系设计(含CAD零件图装配图)(任务书,开题报告,文献摘要,外文翻译,论文说明书10000字,CAD图纸5张,答辩PPT)
摘  要
汽车转向是指汽车需要在行驶的过程中按照司机的意识来改变行驶方向。汽车的转向系统作为一种专用机构，它可以被用来改变汽车的行驶方向。本文的设计内容针对的是重型自卸汽车的转向系设计。
本文的设计针对的是和非独立悬架互相匹配的整体式两轮转向机构。利用了连杆机构运动理论和汽车设计中的知识，首先对汽车的总体参数进行了总结，在以上的基础上，首先对转向器和转向传动机构的类型进行了比较、选择，接着再对转向器和转向传动机构尤其是转向梯形进行了参数化设计，最后，利用绘图软件完成了转向梯形和转向器的二维图纸。
在这次的转向器的设计中我选用的转向器是循环球式齿条齿扇转向器，在对转向器的设计中，包括了齿条—齿扇传动副的设计和螺杆—钢球—螺母传动副的设计，前者是根据汽车前轴的载荷来计算出齿扇模数，再在此基础上设计出所有参数的，而后者基于参照同类型汽车，确定了钢球的中心距，再在此基础上设计出一系列的尺寸。
在本次的设计中转向梯形选用的是整体式转向梯形，本文在设计中参考了类似汽车转向梯形设计的经验尺寸从而来对转向梯形的尺寸进行了初步选定。再通过检验转向内轮实际达到的最大偏转角时与转向外轮理想最大偏转角度的差值以及作为一种四杆机构的最小传动角是否符合标准，来判断转向梯形的设计是否合理。 [资料来源：http://www.doc163.com]
关键词：转向系；转向器；转向梯形

Abstract
In a moving vehicle, the drivers need to frequently change its traveling direction, so-called steering. Vehicle steering system is used to change or restore a car in the direction of a dedicated agency, this paper is about the study of light vehicle steering system design.
The design of this paper is aimed at the integral two-wheel steering mechanism that matches the non-independent suspension. Based on the motion theory of the connecting rod mechanism and the knowledge of the automobile design, the general parameters of the automobile are designed. On the basis of the above, the type of the steering gear and the steering mechanism are compared, And the steering mechanism, especially the steering trapezoid, the parametric design is carried out. Finally, the two-dimensional drawings of the steering trapezoidal and diverter are finished by drawing software.
In this design of the diverter, the steering gear I chose was a recirculating ball rack and pinion diverter, which included the design of the rack-toothed gear drive and the screw-steel ball in the design of the diverter, Nut drive sub-design, the former is based on the load on the front axle to calculate the gear fan modulus, and then based on the design of all the parameters, while the latter based on the same type of car, determine the center of the ball, and then On this basis to design a series of sizes. [资料来源：http://doc163.com]
In this design, the trapezoidal trapezoid is used as the integral steering trapezoid. In this paper, the size of the trapezoidal trapezoid is selected by reference to the empirical size similar to that of the automobile steering trapezoidal design. It is judged whether the design of the steering trapezoid is reasonable by checking the difference between the maximum deflection angle actually reached when the steering wheel is actually reached and the minimum transmission angle of the steering wheel and the minimum transmission angle as a four-bar mechanism.
Key word: steering system;steering gear;steering trapezoid
  [资料来源：www.doc163.com]

目  录
摘  要    I
ABSTRACT    II [来源：http://Doc163.com]
第1章绪论    2
1.1研究目的和意义    2
1.2国内外现状    3
1.3设计内容    3
1.3.1设计的基本内容    3
1.3.2研究的基本目标    4
1.3.3技术路线    4
第2章整体方案确定    6
2.1转向系整体方案的分析    6
2.1.1转向器方案的分析    6
2.1.2循环球式转向器结构及工作原理    6
2.2转向助力系统分类    7
2.3转向系整体方案总结    8
第3章转向系统的设计计算    9
3.1转向系主要性能参数    9
3.1.1.转向器的效率    9
3.1.2.传动比的变化特性    10
3.1.3.给定的主要计算参数    10
3.1.4.转向盘回转总圈数     11
3.2转向系计算载荷的确定    11
3.3循环球式转向器的计算    11
3.3.1循环球式转向器主要参数    12 [资料来源：Doc163.com]
3.3.2螺杆、钢球和螺母传动副    12
3.3.3齿条、齿扇传动副设计    13
3.4循环球式转向器中零部件强度的校核    15
3.5.1钢球与滚道间的接触应力     15
3.5.2齿的弯曲应力     16
3.5液压动力转向机构的计算    16
3.5.1动力转向系统的工作原理    16
3.5.2转向动力缸的工作分析    17
3.6转向梯形机构的选定、计算和优化    20
3.6.1转向梯形结构方案分析    20
3.6.2整体式转向梯形机构的优化方案分析及设计    21
第4章结论    27
参考文献    28
致谢    30 [版权所有：http://DOC163.com]