毕业设计论文cad图纸：eps减速机构的优化设计.zip

毕业设计：EPS减速机构的优化设计
论文说明书共53页，字数总计：26533
资料简介：
毕业设计（论文）：EPS减速机构的优化设计.doc
毕业设计（论文）开题报告.rtf
毕业设计（论文）任务书.doc
电动助力转向系统（译文）.docx
电动助力转向系统（原文）.docx
进度考核表.doc
目录.doc
内容提要（英）.doc
内容提要（中）.doc
新评阅表.doc
优秀毕业论文简介.doc
优秀毕业论文专家评审表.doc
优秀毕业设计(论文)申报表.doc
A0-EPS减速机构装配图.dwg
A2-壳体.dwg
A0-壳体装配.dwg
A2-轴承壳.dwg
A3-蜗轮组合.dwg
A3-蜗杆.dwg
A3-套筒.dwg
A3-输出轴.dwg
A4-联轴器.dwg
A3-安装支架（中）.dwg
A3-安装支架（下）.dwg
A3-安装支架（上）.dwg
A3-安装垫块.dwg

内容提要

电动助力转向系统是典型的机电一体化系统，涉及的学科非常广泛。包括机械设计、汽车理论、电力电子、计算机技术、控制技术、传感器技术和电机技术等多个领域，因具有节约燃料、减轻自重、提高主动安全性、有利于环保等一系列优点，已成为世界汽车转向技术发展的研究趋势。
减速机构作为电动助力转向系统的关键部件之一，因体积的大小直接影响安装空间和汽车的布局，在设计的过程中不仅要满足自身的强度要求还应使其体积尽可能的小，结构更紧凑。因此，有必要对所设计的减速机构进行结构上的优化，达到整体设计要求。
在优化设计过程中，以减速机构中蜗杆传动中心距最小、蜗轮齿冠体积最小以及总体积最小为目标。用Pro/E软件建立汽车EPS减速机构三维模型。应用ANSYS软件对汽车EPS结构中涡轮及蜗杆组件进行强度校核。对汽车EPS中动力学模型、助力电动机模型、进行数学建模，选择EPS助力特性曲线的相关参数，设计EPS的助力特性曲线。
在对电动助力转向器减速机构优化设计后，达到蜗杆传动中心距最小、蜗轮齿冠体积最小以及总体积最小为目标，同时使转向更灵活，安装空间更小。
Summary

Electric power steering system is the typical electromechanical integration system, involved very extensive subject. Such as mechanical design, automobile theory, power electronics, computer technology, control technology, the sensor technology and motor technology etc, because it has advantages of saving fuel,weight light , improving their security and being good for the environment ,so it has became the vehicle steering technology development trend of research.
Decelerate institutions regard as one of the key components of electric power steering system , the layout of installation space and car is directly affected by the size . in design process,it is not only to meet its own strength requirement ,also should make its volume smaller, structure more compact. Therefore, it is necessary to design the deceleration institutions on the structure optimization, achieve integral design requirements.
In the optimization design process, aiming at reducing the distance of worm transmission center , worm volume and the total volume.Using Pro/E software to built 3D model of EPS. ANSYS software EPS structure turbine and check intensity worm components.buit EPS of car dynamics model, power motor model and mathematical modeling, choose EPS dynamical characteristics curve related parameters and the design of dynamical characteristics curve EPS.
After designing electric power steering gear deceleration institutions of optimized, satisfy the smallest of worm transmission center, tooth corona of worm and the total volume, while making the steering more flexible, installation space smaller.

目录

内容提要............................. ............ ....... .. Ⅰ
Summary.................................... . ....... ...... Ⅱ
1 绪论........................... ....... .... ..... .... ....1
1.1论文的研究背景与意义...................... ... ........ ....1
1.2 转向系统的发展历程........................ .... . . .. ....1
1.3 EPS国内外研究现状和存在的问题............ ....... ... ....3
2 汽车EPS减速机构优化设计............. . .. ...... .. ....... 8
2.1汽车EPS概述.............. ............ ... ..... . . . . ..8
2.2汽车EPS的组成结构........... ........ ....... ..........10
2.3汽车EPS减速机构优化设计...... ...... ...... ..............18
3 汽车EPS结构有限元分析..... ...... .. ... ..... .............26
3.1结构有限元分析关键技术...... ... .... ...... ..............26
3.2汽车EPS结构静力学分析....... . ...... ... .................27
3.3接触应力的理论公式解与有限元分析结果的对比.. ....... .....34
4 汽车EPS动态特性分析........ ..... .... ...... .. .... ......36
4.1汽车EPS动力学模型计算....... ......... .... ..... .........36
4.2汽车EPS助力特性曲线设计... ......... .... ................40
4.3 理想的电动转向转向手力模型....... .... ..... . ...........43
4.4汽车EPS转向性能分析........... ...... ... .... .... .......45
总结....... .......... .. ...... ...... ..... .... .............50
参考文献.......... ............ ..... ..... ...... ..........51
致谢............ ............ ........ ....... . ............52