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齿轮齿条式转向器设计
摘  要
该设计在对齿轮齿条式转向器的结构及工作原理进行分析的基础上，完成齿轮齿条动力总成的设计。包括齿轮齿条式转向器、转向助力装置、动力缸、转向控制阀总成及齿轮、齿条、动力缸等零件的设计，同时还进行了相关校核工作。经校核计算及理论分析，该齿轮齿条式转向器动力总成能够满足相关规范及工作要求。
对于只用前桥转向的三轴汽车，由于中轮和后轮的轴线总是平行的，故不存在理想的转向中心。计算转弯半径时，可以用一根与中、后轮轴线等距离的平行线作为假想的与原三轴汽车相当的双轴汽车的后轮轴线。
对于用第一、第三两车桥转向的三轴汽车，可以第二桥车轮轴线为基线，分别利用上式求出第一桥和第三桥两侧车轮偏转角之间的理想关系式，作为设计上述两车桥的转向梯形的依据。动力转向系除具有以上三大部件外，其最主要的动力来源是转向助力装置。由于转向助力装置最常用的是一套液压系统，因此也就离不开泵、油管、阀、活塞和储油罐，它们分别相当于电路系统中的电池、导线、开关、电机和地线的作用[1]。

关键词：转向器；齿轮齿条；设计

Abstract

The steering assembly with rack and pinion was designed based on the analyse of the structure and working principle of steering gear.The design included some assemblys,suah as steering gear,power steering gear,steering control valve.The design included some element too,such as rack,pinion,power steering cylinder,verifications were done at the same time.The steering gear could work and meet the related standards.
Mechanical steering system is the energy source of manpower, all-edge pieces are mechanical, to manipulation by the institutions (steering wheel), the steering gear, transmission mechanism to three major components. Redirector is the manipulation of the rotary motion into linear motion drive mechanism (strictly speaking is similar to linear motion), is the shift of the core components.
Power steering in addition to these three components, its main power source is the power steering device. The power steering devices most commonly used is a hydraulic system, and there is inseparable from the pump, tubing, valves, piston and storage tanks, each equivalent circuit system of batteries, wires, switches, motors and the role of ground.
Redirector (also often called to the machine), is completed by the otary motion to linear motion (or approximate linear motion), a group of gears, but lso to a slowdown in the transmission of the device. History, there have been various forms of redirector Xu, a more commonly used rack-and worm that crank pins, recycling the ball - rack-tooth fans, circulating that the ball crank the first and the third form of the deformation, and worm wheel is a rare even.

Key words：Steering gearrack ； pinion；design 
目  录
摘要………………………………………………………………………………I
Abstract II
第1章 绪论 1
1.1 引言 1
1.2 齿轮齿条式动力转向器的工作原理 4
1.2.1 齿轮齿条转向器工作原理 4
1.2.2 动力转向系统的工作原理 4
第2章 转向器的整体结构设计方案 8
2.1 动力转向器的整体结构及附属机构 8
2.2 转向器结构方案分析 10
2.3 液压动力转向特点分析 10
2.3.1 液压动力转向系统 13
2.3.2 常流式液压动力转向系统 13
2.3.3 常流式液压助力转向系统的结构布置方案 14
2.3.4 转向油罐与转向油泵 16
第3章 转向器结构方案的确定和具体设计 20
3.1 转向器结构确定 20
3.1.1 阿克曼几何学 20
3.1.2 最小转弯半径  21
3.1.3 转向系的效率 22
3.1.4 转向系的角传动比与力传动比 23
3.2 齿轮齿条传动副设计 25
3.2.1 变传动比齿轮齿条的原理分析 25
3.2.2 斜齿圆柱齿轮的设计 26
3.2.3 传动副传动方案的设计 27
3.2.4 齿条的设计 27
3.3 动力缸结构设计 28
3.3.1 作用力的计算 28
3.3.2 动力缸尺寸计算 29
结  论 31
致  谢 32
参考文献 33
附  录 34