【正文】 lection, the advantages and disadvantages of different types of rack and pinion steering, and all types of rack and pinion steering application status. The steering transmission ratio calculated under the original data, and determine the geometric parameters of the rack and pinion. Rack and pinion steering the overall design, stress analysis, and rack and pinion fatigue strength of the tooth root bending fatigue strength. Unreasonable data correction rack and pinion steering. Through the design of the rack and pinion steering, select the related parts such as screws, bearings, etc., and make the steering parts diagram. Keywords： Steering systems, rack and pinion, steering 西南科技大學(xué)城市學(xué)院本科生畢業(yè)論文 III 目 錄 第 1章 緒論 ......................................................................................................................... 1 概述 ........................................................................................................................ 1 轉(zhuǎn)向器的作用與分類 ............................................................................................ 1 汽車轉(zhuǎn)向裝置的發(fā)展趨勢 .................................................................................... 2 汽車轉(zhuǎn)向器國內(nèi)外現(xiàn)狀 ........................................................................................ 4 設(shè)計的主要內(nèi)容 .................................................................................................... 5 第 2章 齒輪齒條轉(zhuǎn)向器設(shè)計方案選擇 ............................................................................. 7 車輛相關(guān)數(shù)據(jù)與設(shè)計要求 .................................................................................... 7 轉(zhuǎn)向器總體方案設(shè)計 ............................................................................................ 9 轉(zhuǎn)向器設(shè)計方案說明 ................................................................................. 9 轉(zhuǎn)向器輸入輸出形式 ................................................................................. 9 轉(zhuǎn)向器各種輸出形 式對比 ......................................................................... 9 齒輪齒條轉(zhuǎn)向器齒輪齒條選擇 ............................................................... 10 齒輪齒條轉(zhuǎn)向器齒條斷面形狀 ............................................................... 10 齒輪齒條式轉(zhuǎn)向器的布置形式 ............................................................... 11 轉(zhuǎn)向器最終方案確定 ............................................................................... 12 第 3章 轉(zhuǎn)向器齒輪齒條設(shè)計計算過程 ........................................................................... 13 轉(zhuǎn)向輪側(cè)偏角計算 .............................................................................................. 13 轉(zhuǎn)向器原地轉(zhuǎn)向阻力矩計算 .............................................................................. 14 轉(zhuǎn)向器角傳動比與力傳動比計算 ...................................................................... 14 角傳動比與力傳動比介紹 ....................................................................... 14 角傳動比與力傳動比確定 ....................................................................... 14 齒輪齒條設(shè)計 ...................................................................................................... 16 齒輪齒條嚙合傳動的特點 ....................................................................... 16 齒輪參數(shù)的選擇 ....................................................................................... 17 計算接觸疲勞許用應(yīng)力 ........................................................................... 17 齒輪的齒根彎曲強度設(shè)計 ....................................................................... 18 確定齒輪主要參數(shù)和幾何尺寸 ............................................................... 19 西南科技大學(xué)城市學(xué)院本科生畢業(yè)論文 IV 確定齒條主要參數(shù)和幾何尺寸 ............................................................... 20 齒面接觸疲勞強度校核 ........................................................................... 22 第 4章 齒輪軸的設(shè)計 ....................................................................................................... 23 齒輪齒條傳動受力分析 ...................................................................................... 23 齒輪軸最小軸徑確定 .......................................................................................... 23 齒輪軸的強度校核 .............................................................................................. 24 第 5章 間隙調(diào)整彈簧的設(shè)計計算 ................................................................................... 28 選擇材料 .............................................................................................................. 28 計算彈簧絲直徑 .................................................................................................. 28 彈簧圈數(shù)和自由高度的計算 .............................................................................. 29 彈簧校核與結(jié)構(gòu)尺寸確定 .................................................................................. 29 彈簧工作時的數(shù)據(jù) .............................................................................................. 30 第 6章 其他零件的選擇與潤滑方式確定 ....................................................................... 32 軸承的選擇 .......................................................................................................... 32 轉(zhuǎn)向器潤滑方式 .................................................................................................. 33 總 結(jié) ................................................................................................................................... 36 致 謝 ................................................................................................................................... 38 參考文獻 ............................................................................................................................. 39 附圖 ..................................................................................................................................... 40 西南科技大學(xué)城市學(xué)院本科生畢業(yè)論文 1 第 1章 緒論 概述 改革開放以來，我國汽車工業(yè)發(fā)展迅猛。 轉(zhuǎn)向器是轉(zhuǎn)向系的減速傳動裝置，一般由 12 級減速傳動副。 目前應(yīng)用比較廣泛的轉(zhuǎn)向器有齒輪齒條式轉(zhuǎn)向器、循環(huán)球式轉(zhuǎn)向器、蝸桿滾輪式轉(zhuǎn)向器、蝸桿曲柄指銷式轉(zhuǎn)