【正文】 d steering linkage parts, including steering important parts of automobile steering systems, the performance of a direct impact on the safety and reliability of the cars. Power steering system (Power Steering System), also called steering afterburner system in the mechanical steering system based on the creation of a steering system steering afterburner device. This topic entitled trucks recirculating ball steering system design. Subject to mechanical steering recirculating ball steering system design and check the overall steering trapezoid design and checking. First automobile steering systems overview, analysis of the working principle and the advantages and disadvantages of various steering system, development status, the working principle of the various steering and steering system design overview of two preliminary data preparation for design , the steering system of the overall program of choice, there are turning to the determination of the main performance parameters of the system. steering the choice of form and an initial parameters, select the data of the recirculating ball steering, and its main ponents stress analysis and data check. Fourth, the power steering mechanism design, an overview of the requirements for power steering, power steering layout scheme and the calculation of individual data. Fifth overall steering trapezoidal design and checking the size of the design of the steering linkage and data according to the trapezoid. Use AutoCAD to make the final design of the recirculating ball steering part drawings and assembly drawings. Mainly carried out in this paper, the design of the recirculating ball steering and check the steering system parts, the main methods and theoretical parameters of automotive design experience. the mechanical design of the course content and the university design, the results meet the strength requirements, safe and reliable. Key words: Steering system。最后設(shè)計(jì)中運(yùn)用 AutoCAD 作出循環(huán)球式轉(zhuǎn)向器的零件圖以及裝配圖 .在本文中主要進(jìn)行了 循環(huán)球式轉(zhuǎn)向器 的設(shè)計(jì)和對(duì)轉(zhuǎn)向 系統(tǒng)零件 的校核，主要方法和理論采用汽車設(shè)計(jì)的經(jīng)驗(yàn)參數(shù)和大學(xué)所學(xué)機(jī)械設(shè)計(jì)的課程內(nèi)容進(jìn)行設(shè)計(jì)，其結(jié)果滿足強(qiáng)度要求，安全可靠。首先對(duì)汽車轉(zhuǎn)向系 統(tǒng) 進(jìn)行概述 ,分析各種轉(zhuǎn)向系統(tǒng)的工作原理和優(yōu)缺點(diǎn)、發(fā)展現(xiàn)狀 ,說(shuō)明各種轉(zhuǎn)向器的工作原理 .并對(duì)轉(zhuǎn)向系的設(shè)計(jì)進(jìn)行一定的概述 .二是作設(shè)計(jì)前期數(shù)據(jù)準(zhǔn)備 ,對(duì)轉(zhuǎn)向系統(tǒng)的整體方案進(jìn)行選擇 ,還有轉(zhuǎn)向系統(tǒng)主要性能參數(shù)的確定 .三是 轉(zhuǎn)向器形式的選擇以及初 定各個(gè)參數(shù) ,對(duì)循環(huán)球式轉(zhuǎn)向器的各個(gè)數(shù)據(jù)進(jìn)行選擇 ,并對(duì)其 主要部件進(jìn)行受力分析與數(shù)據(jù)校核 .四 是對(duì) 動(dòng)力轉(zhuǎn)向機(jī)構(gòu)的設(shè)計(jì) ,概述對(duì)動(dòng)力轉(zhuǎn)向機(jī)構(gòu)的要求 ,對(duì)動(dòng)力轉(zhuǎn)向機(jī)構(gòu)的布置方案進(jìn)行選擇并進(jìn)行各個(gè)數(shù)據(jù)的計(jì)算。 本課題的題目是 貨車循環(huán)球式 轉(zhuǎn)向系 統(tǒng) 的設(shè)計(jì)。非動(dòng)力轉(zhuǎn)向系統(tǒng)又稱機(jī)械式轉(zhuǎn)向系統(tǒng) ， 是以人的體力為動(dòng)力源，其中所有的傳力器件都是機(jī)械的，主要由轉(zhuǎn)向操縱機(jī)構(gòu)、轉(zhuǎn)向器和轉(zhuǎn)向傳動(dòng)機(jī)構(gòu)三部分組成，其中轉(zhuǎn)向器是汽車轉(zhuǎn)向系統(tǒng)的重要零部件，其性能的好壞直接影響汽車行駛的安全性和可靠性。駕駛操縱用來(lái)改變或恢復(fù)汽車行駛方向的專用機(jī)構(gòu)稱為汽車轉(zhuǎn)向系統(tǒng)。 畢 業(yè) 設(shè) 計(jì)（論 文） 題 目： 貨車循環(huán)球式轉(zhuǎn)向系統(tǒng)設(shè)計(jì) （英文）： 院 別： 專 業(yè)： 姓 名： 學(xué) 號(hào)： 指導(dǎo)教師： 日 期： 貨車循環(huán)球式轉(zhuǎn)向系統(tǒng)設(shè)計(jì) 摘要 汽車在行駛的過(guò)程中 ，經(jīng)常需要改變行駛的方向，稱為轉(zhuǎn)向。輪式汽車行駛是通過(guò)轉(zhuǎn)向輪 (一般是前輪 )對(duì)汽車縱向軸線偏轉(zhuǎn)一定角度來(lái)實(shí)現(xiàn)的。常用的汽車轉(zhuǎn)向系統(tǒng)分為非動(dòng)力轉(zhuǎn)向系統(tǒng)和動(dòng)力轉(zhuǎn)向系統(tǒng)兩大類。汽車動(dòng)力轉(zhuǎn) 向系統(tǒng) (Power Steering System)，亦可稱作轉(zhuǎn)向加力系統(tǒng)，是在機(jī)械轉(zhuǎn)向系的基礎(chǔ)上增設(shè)了一套轉(zhuǎn)向加 力裝置所構(gòu)成的轉(zhuǎn)向系統(tǒng)。 課題以機(jī)械式轉(zhuǎn)向系統(tǒng)的循環(huán)球式轉(zhuǎn)向器設(shè)計(jì)及校核、整體式轉(zhuǎn)向梯形機(jī)構(gòu)的設(shè)計(jì)及驗(yàn)算為中心。五是 整體式轉(zhuǎn)向梯形機(jī)構(gòu)的設(shè)計(jì)以及驗(yàn)算 ,并根據(jù)梯形數(shù)據(jù)對(duì)轉(zhuǎn)向傳動(dòng)機(jī)構(gòu)作尺寸設(shè)計(jì)。 關(guān)鍵詞 ：轉(zhuǎn)向系 統(tǒng) ；機(jī)械型轉(zhuǎn)向器 ； 循環(huán)球式 ；液壓式助力轉(zhuǎn)向器 Truck circulating ball type steering system design Abstract Cars in the course of traveling, often need to change the direction of travel, referred to as steering. Wheeled vehicle with the vehicle longitudinal axis of the deflection angle by the steering wheel (typically a front wheel). The driving control is used to change or restore the direction of vehicle travel special body called the automobile steering systems. Commonly used in automotive steering system is divided into nonpower steering system and power steering system two categories. Nonpower steering system, also known as mechanical steering system, based on a person39。 Mechanical type steering gear。 Hydraulic power steering gear 目錄 1 緒論 ................................................................... 1 汽車轉(zhuǎn)向系統(tǒng)概述 .................................................. 1 機(jī)械式轉(zhuǎn)向系統(tǒng) ................................................ 1 液壓助力轉(zhuǎn)向系統(tǒng)（ HPS） ....................................... 2 電控液壓助力轉(zhuǎn)向系統(tǒng)（ EHPS） .................................. 2 電動(dòng)助力轉(zhuǎn)向系統(tǒng)（ EPS） ....................................... 3 線控轉(zhuǎn)向系統(tǒng)（ SBW） ........................................... 5 轉(zhuǎn)向系設(shè)計(jì)概述 .................................................... 6 對(duì)轉(zhuǎn)向系的要求 ............................................... 6 轉(zhuǎn)向操縱機(jī)構(gòu) ................................................. 7 轉(zhuǎn)向傳動(dòng)機(jī)構(gòu) ................................................. 7 轉(zhuǎn)向器 ....................................................... 8 2 轉(zhuǎn)型系方案的選擇及主要參數(shù)的確定 ...................................... 10 轉(zhuǎn)向系方案的選擇 ................................................. 10 轉(zhuǎn)向盤(pán) ...................................................... 10 轉(zhuǎn)向軸 ...................................................... 10 轉(zhuǎn)向器 ...................................................... 10 轉(zhuǎn)向梯形 .................................................... 12 轉(zhuǎn)向輪側(cè)偏角計(jì)算 ............................................ 13 轉(zhuǎn)向系主要性能參數(shù) ............................................... 15 轉(zhuǎn)向器的效率 ................................................ 15 傳動(dòng)比的變化特性 ............................................ 17 轉(zhuǎn)向器角傳動(dòng)比及 其變化規(guī)律 .................................. 19 轉(zhuǎn)向器傳動(dòng)副的傳動(dòng)間隙 ...................................... 19 轉(zhuǎn)向盤(pán)的總轉(zhuǎn)動(dòng)圈數(shù) .......................................... 22 3 機(jī)械式轉(zhuǎn)向器設(shè)計(jì)與計(jì)算 ................................................ 23 主要尺寸參數(shù)的選擇 ................................................ 23 螺桿、鋼球、螺母?jìng)鲃?dòng)副設(shè)計(jì) ....................................... 25 鋼球中心距 D 螺桿外徑 螺母內(nèi)徑 ................................ 25 鋼球直徑 d 及數(shù)量 n ........................................... 25 滾道截面 .................................................... 26 接觸角 ? ...................................................