四轮转向传动系统设计毕业设计论文

汽车专业毕业论文---答辩通过极具参考价值

摘要

本文主要研究了四轮转向传动系统的基本结构和工作原理，并对四轮转向传动路线进行了简要分析。以此为理论基础，以某汽车的相关参数设计了四轮转向转向器。包括前轮转向器的设计计算，后轮转向执行器的设计，齿条等强度的计算。四轮转向传动系主要是通过车速传感器、前轮转角传感器、前轮转速传感器、方向盘转角传感器、后轮转角传感器、后轮转速传感器，发送信号到四轮转向控制器内，信号经过处理，得出后轮所需的转角大小及方向，控制执行器完成转向。此系统可以改善车辆低速的转向灵活性和高速时的操纵稳定性，使汽车在转向时响应快，转向能力强，直线行驶稳定。前轮转向器是四轮转向的基础部件，是电机助力的齿轮齿条转向器。后轮执行器是驱动后轮转向的主要部件。通过对前轮转向器和后轮执行器的设计，为四轮转向技术整体设计提供了基础。

关键词四轮转向，齿轮齿条电动助力转向器，后轮转向执行器

汽车专业毕业论文---答辩通过极具参考价值

Abstract

This paper mainly studies is the four-wheel steering transmission system the basic structure and working principle, and the four-wheel steering transmission routes are briefly analyzed.This theory, with a car related parameters of the four-wheel steering transmission system was designed. Including front wheel steering gear design calculation, rear wheel actuator design strength calculation,

rack .Four-wheel steering transmission system is primarily through speed sensor, front wheel Angle sensor, front wheel speed sensor, steering wheel Angle sensor, rear Angle sensor, rear Lord Angle sensor, rear vice, rotational speed sensor sends a signal to the four-wheel steering controller inside, signal through processing, draw the rear required corner size and direction, control actuator finish turning. This system can improve vehicle speed steering flexibility and high speed control stability of, make cars in steering response quickly, steering capability is strong, run straight stability. Front wheel steering gear is the basic components, four-wheel steering motor hydraulically rack-and pinion steering gear Rear actuators are drive rear wheel steering the major components. Through the front wheel steering gear and rear actuator is designed for four-wheel steering technology integral design provides the basis.

Key words Four-wheel steering gear rack of electric power steering gear, rear wheel actuators

汽车专业毕业论文---答辩通过极具参考价值

目录

摘要.............................................................I Abstract....................................................... II 目录.......................................................... III 第一章绪论................................................ - 1 - 第二章设计方案选择........................................ - 7 -

2.1 各传感器位置确定................................... - 7 -

2.2 转向机构的设计要求................................. - 8 -

2.3 转向梯形设计....................................... - 9 -

2.4 本章小结.......................................... - 10 - 第三章齿轮齿条电动助力转向器设计计算 .................... - 11 -

3.1 转向器的效率...................................... - 11 -

.................................... - 11 -

3.2 转向器正效率η

+

3.3 转向器逆效率η- ................................... - 12 -

3.4 传动比的变化特性.................................. - 13 -

3.4.1力传动比与角传动比的关系...................... - 14 -

3.5 参数选择.......................................... - 16 -

3.5.1转向轮侧偏角计算.............................. - 17 -

3.6 转向系载荷确定.................................... - 18 -

3.7 转向器的主要元件设计.............................. - 20 -

3.7.1选择齿轮齿条材料.............................. - 20 -

3.7.2齿轮齿条基本参数.............................. - 22 -

3.7.3转向横拉杆及其端部............................ - 23 -

3.7.4齿条调整...................................... - 24 -

3.8 齿轮齿条转向器转向横拉杆的运动分析................ - 26 -

3.9 齿轮齿条传动受力分析.............................. - 27 -

3.10 弹簧的设计计算................................... - 32 -

3.11 齿轮轴轴承的校核................................. - 35 -

3.12 电机选择......................................... - 36 -