机械毕业设计（论文）-轿车的转向系统的结构设计(含全套CAD图纸).doc

摘要
本课题的题目是转向系的设计。以齿轮齿条转向器的设计为中心,一是轿车转向系统总述;二是机械转向器的选择;三是齿轮和齿条的合理匹配,以满足转向器的正确传动比和强度要求;四是动力转向机构设计;五是梯形结构设计。因此本课题在考虑上述要求和因素的基础上研究利用转向盘的旋转带动传动机构的齿轮齿条转向轴转向,通过万向节带动转向齿轮轴旋转,转向齿轮轴与转向齿条啮合,从而促使转向齿条直线运动,实现转向。实现了转向器结构简单紧凑,轴向尺寸短,且零件数目少的优点又能增加助力,从而实现了汽车转向的稳定性和灵敏性。在本文中主要进行了转向器齿轮齿条的设计和对转向齿轮轴的校核,主要方法和理论采用汽车设计的经验参数和大学所学机械设计的课程内容进行设计,其结果满足强度要求,安全可靠。
关键词:轿车转向系齿轮齿条设计转向梯形
Cars Steering Mechanism Design
Abstract:The title of this topic is the design of steering system. Rack and pinion steering gear to the design as the center, first are cars’ steering system overview; Second, Cars steering system performance parameters; third rack gear and a reasonable match to meet the correct steering gear ratio and strength requirements; Fourth, power steering mechanism design; Fifth, the structural design of trapezoidal. Therefore, taking into account the above issues and factors that require study, based on the steering wheel rotary drive transmission shaft of the steering rack and pinion steering, through the universal joint drive shaft rotation gear shift, steering rack and steering gear shaft meshing, thereby encouraging steering rack linear motion to achieve steering. Simple structure to achieve the steering tight, short axial dimension, and the number of parts can increase the advantages of less power in order to achieve the vehicle steering stability and sensitivity. In this article a major design steering rack and pinion steering gear shaft and the check, the main methods and theoretical experience in the use of automotive design parameters and the University of mechanical design school curriculum design and the results meet the strength requirements, safe and reliable.
Keywords: Car; Steerin; Mechanical Type Steering Gear and Gear Rack; SteeringTrapezoida
目录
第1章轿车转向系统总述 1
轿车转向系统概述 1
转向系统的结构简介 1
轿车转向系统的发展概况 1
轿车转向系统的要求 2
第2章转向系的主要性能参数 4
转向系的效率 4
转向器的正效率 4
转向器的逆效率 5
传动比变化特性 6
转向系传动比 6
力传动比与转向系角传动比的关系 7
转向器角传动比的选择. 8
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