畢業(yè)設計（論文）說明書課題名稱：輕型貨車（5+1）擋變速器設計（直接操縱、全部采用同步器換擋）系 別： 汽車與交通學院 專 業(yè)：班 級：學 號：姓 名：指導教師：年 5 月 18 日摘 要本次輕型貨車變速器的設計，主要目的是檢驗大學四年的學習成果。文中闡述了變速器的功用與設計要求，對該變速器進行了了大量的調查研究，并進行了初步的方案論證，根據設計要求選用中間軸式五檔變速器，其優(yōu)點：最高擋采用直接擋，傳遞扭矩效率高，齒輪和軸承磨損小，噪音小。中間軸采用旋轉式，中間軸上的全部斜齒輪的螺旋方向一律取為右旋，第一、第二軸上的斜齒輪取左旋。五個前進擋和倒擋均采用鎖環(huán)式慣性同步器換擋，保證迅速、省力、無沖擊、無噪音換擋，與操作熟練程度無關，從而提高了加速性、經濟性和行駛安全性。根據輕型貨車的要求，操縱機構選用直接操縱。本文說明并論證了變速器主要參數的確定，齒輪幾何參數的計算、列表、齒輪材料的選擇、齒輪的強度計算、強度校核，軸的設計及強度剛度校核，軸的材料選擇，軸承的選擇，花鍵的選擇以及簡單介紹了變速器的拆裝順序和對本次設計做出總結。關鍵詞：輕型貨車；變速器設計；中間軸式；倒擋ABSTRACTThe design of this light truck transmission, the main purpose is to test the results of four years of study in the university. This design explained the function of the function and design requirements, had the transmission a large number of surveys and studies, and conducted a preliminary studies program. According to the design requirement to choose a intermediate bearing type five gear transmission and its advantages are: the high grade adopts the direct, it is high in efficiency to transmit the torsion , the wearing and tearing of gears and axles is light .the intermediate shaft with rotary, The middle of all the helical gear shaft be taken as the right-hand screw direction, the first and second helical gear to take left. The five gears and reverse gear all use lock ring type inertia synchronizer shifted gears and ensure rapid, labor-saving, non-impact, noise-free transmission ,and operation of proficiency has nothing to do so as to enhance the car’s acceleration economy and road safety. According to the design requirements of the light truck ,the manipulation agencies use direct control. Noted and demonstrated that the transmission parameters, the calculations and the list of gear geometry parameters ,the gear material selection ,gear strength and strength check, the design of the shaft and stiffness and strength check ,shaft material selection, bearing selection, spline options .And briefly introduce the transmission disassembly sequence, as well as a summary of this design.KEY WORD: light truck；transmission design；intermediate bearing type；the reverse gear shaft