机械5

某型汽车转向系统设计与分析 摘要：在当今社会中，汽车越来越受到人们的青睐，为了出行方便，基本上家家户户都拥有了各种款式不同的小轿车，可见汽车在未来社会发展中的重要性和必要性，而且，人们对汽车的安全性和智能性的要求也不断的提升，安全性的需求主要体现在汽车在路面上行驶的安全，各种操作机构的安全可靠性，以及制动系统的安全可靠性。此次设计齿轮齿条式转向器，通过选择转向系的方案，确定转向系的性能参数，计算转向器的齿轮齿条强度和转向器的角传动比等参数以及确定齿轮齿条转向器内部结构的布置形式，并进行其强度校核，最后通过使用三维绘图软件solidworks绘制出设计合理的齿轮齿条式转向器,并挑选其中的主要零件使用CAD绘制出二维图。齿轮齿条式转向器在汽车中的使用状况比较大众化，期望经此次设计，对齿轮齿条式转向器起到优化效果，以满足用户的使用需求。 关键词：轿车；转向系统；转向器；齿轮齿条；设计 A car steeri
ng system desig
n a
nd a
nalysis Abstract：I
n today's society, cars are more a
nd more by people of all ages, i
n order to facilitate travel, basic every household have avariety of differe
nt styles of cars, the
necessity a
nd importa
nce ofvisible automobile i
n the future developme
nt of the society a
nd people of automobile safety a
nd i
ntellige
nt requireme
nts are also co
nsta
ntly improve, safety dema
nd mai
nly reflected i
n the car drivi
ng o
n the road safety, the safety a
nd reliability of thevarious operati
ng mecha
nism, a
nd braki
ng system of safety a
nd reliability, steeri
ng system as o
ne of the four system i
n automobile structure, its importa
nce does
not say, a
nd. The desig
n of rack a
nd pi
nio
n steeri
ng, the steeri
ng system scheme, determi
ne the spi
n To the performa
nce of the system parameters calculated steeri
ng gear rack stre
ngth a
nd steeri
ng device of a
ngle tra
nsmissio
n ratio parameters a
nd determi
ne the rack a
nd pi
nio
n steeri
ng arra
ngeme
nt of the i
nter
nal structure, a
nd check its stre
ngth. Fi
nally, the use of 3D Drawi
ng Software Solidworks draw the reaso
nable desig
n of gear rack type steeri
ng gear, a
nd pick o
ne of the mai
n parts of the use of CAD drawi
ng a two-dime
nsio
nal diagram. Rack a
nd pi
nio
n steeri
ng device i
n automobile use isvery commo
n, hope by this desig
n, o
n the rack a
nd pi
nio
n steeri
ng device play a role i
n optimizatio
n, a
nd reaso
nable desig
n, meetvarious requireme
nts. Keywords：Car; Steeri
ng System; Steeri
ng Gear; Gear Rack; Desig
n 目录 摘要I Abstract II 1绪论1 1.1研究背景1 1.2汽车转向系统的国内外现状及发展趋势2 1.3液压助力转向系统概述3 1.4本文研究的内容4 2前轮转向汽车的动力学理论5 2.1虚拟样机技术介绍5 2.2轿车前轮转向系统模型建立5 2.2.1前、后悬架模型6 2.2.2转向系统模型7 2.3轿车前轮转向汽车动力学模型8 2.3.1汽车坐标系8 2.3.2线性二自由度2WS汽车模型9 2.3.3线性三自由度2WS汽车模型10 2.3.4轮胎侧偏特性模型11 3机械转向系统的性能要求及参数12 3.1机械转向系统的结构组成13 3.2转向系的效率13 3.3传动比特性13 4齿轮齿条式转向器的基本设计14 4.1齿轮齿条式转向器的结构选择15 4.2齿轮齿条式转向器的布置形式15 4.3转向轮偏角计算16 4.4转向器参数选取与计算17 4.5齿轮轴的结构设计18 4.6转向器材料及其他零件选择18 5齿轮齿条转向器数据校核19 5.1齿条的强度计算20 5.1.1齿条受力分析20 5.1.2齿条齿部弯曲强度的计算20 5.2小齿轮的强度计算21 6转向梯形机构的设计23 6.1转向梯形机构概述24 6.2整体式转向梯形机构方案图解24 6.3整体式转向梯形机构数学模型分析24 6.4转向传动机构的设计26 6.4.1转向传送机构的各部件26 6.4.2转向横拉杆及其端部26 7 solidworks三维设计和CAD二维设计结果27 7.1齿轮齿条式转向器的总成28 7.2齿轮齿条式转向器中的部分零件图28 参考文献30 致谢31