汽車四輪轉向傳動系統(tǒng)設計（全套含CAD圖紙）

- 1 -摘要本文主要研究了四輪轉向傳動系統(tǒng)的基本結構和工作原理，并對四輪轉向傳動路線進行了簡要分析。以此為理論基礎，以某汽車的相關參數(shù)設計了四輪轉向轉向器。包括前輪轉向器的設計計算，后輪轉向執(zhí)行器的設計，齒條等強度的計算。四輪轉向傳動系主要是通過車速傳感器、前輪轉角傳感器、前輪轉速傳感器、方向盤轉角傳感器、后輪轉角傳感器、后輪轉速傳感器，發(fā)送信號到四輪轉向控制器內，信號經(jīng)過處理，得出后輪所需的轉角大小及方向，控制執(zhí)行器完成轉向。此系統(tǒng)可以改善車輛低速的轉向靈活性和高速時的操縱穩(wěn)定性，使汽車在轉向時響應快，轉向能力強，直線行駛穩(wěn)定。前輪轉向器是四輪轉向的基礎部件，是電機助力的齒輪齒條轉向器。后輪執(zhí)行器是驅動后輪轉向的主要部件。通過對前輪轉向器和后輪執(zhí)行器的設計，為四輪轉向技術整體設計提供了基礎。關鍵詞 四輪轉向，齒輪齒條電動助力轉向器，后輪轉向執(zhí)行器- 2 -AbstractThis 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- 3 -目錄摘要 ................................................................IAbstract...........................................................II目錄 ..............................................................III第一章 緒論 .......................................................1 第二章 設計方案選擇 ................................................72.1 各傳感器位置確定 ..........................................7 2.2 轉向機構的設計要求 ........................................8 2.3 轉向梯形設計 ..............................................9 2.4 本章小結 .................................................10 第三章 齒輪齒條電動助力轉向器設計計算 ............................11 3.1 轉向器的效率 .............................................11 3.2 轉向器正效率 η + ..........................................11 3.3 轉向器逆效率 η- ..........................................12 3.4 傳動比的變化特性 .........................................13 3.4.1 力傳動比與角傳動比的關系 .............................14 3.5 參數(shù)選擇 ..................................................163.5.1 轉向輪側偏角計算 .....................................17 3.6 轉向系載荷確定 ...........................................18 3.7 轉向器的主要元件設計 .....................................19 3.7.1 選擇齒輪齒條材料 .....................................19 3.7.2 齒輪齒條基本參數(shù) .....................................21 3.7.3 轉向橫拉桿及其端部 ...................................22 3.7.4 齒條調整 .............................................23 3.8 齒輪齒條轉向器轉向橫拉桿的運動分析 .......................24 3.9 齒輪齒條傳動受力分析 .....................................25 3.10 彈簧的設計計算 ..........................................29 3.11 齒輪軸軸承的校核 ........................................32 - 4 -3.12 電機選擇 ................................................33 3.12.1 助力轉矩的計算 ......................................33 3.12.2 電動機參數(shù)的選擇和計算 ..............................34 3.13 本章小結 ................................................34 第四章 后輪轉向執(zhí)行器設計計算 ....................................35 4.1 執(zhí)行器結構設計 ...........................................35 4.2 齒條設計計算 .............................................35 4.3 回位彈簧的設計計算 .......................................35 4.4 電機選擇 .................................................37 4.4.1 助力轉矩的計算 .......................................37 4.4.2 電動機參數(shù)的選擇和計算 ...............................37 4.5 本章小結 .................................................37 結論 ..............................................................39 致謝 ..............................................................40 參考文獻 ..........................................................41 附錄 ..............................................................42