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車輛與動(dòng)力工程學(xué)院畢業(yè)設(shè)計(jì)說明書
柴油動(dòng)力ＳＵＶ——變速器設(shè)計(jì)
摘要
汽車變速器的主要用途是改變發(fā)動(dòng)機(jī)輸出的扭矩和轉(zhuǎn)速，使之能夠?qū)崿F(xiàn)變速行駛、倒退行駛，并且能夠使駕駛員在不必停止發(fā)動(dòng)機(jī)工作就能停車和停車時(shí)不必停止發(fā)動(dòng)機(jī)動(dòng)作的要求。
本設(shè)計(jì)是設(shè)計(jì)一款能滿足整車要求，即規(guī)定最高車速、最大扭矩、最大功率等要求的 SUV車變速器。通過分析各類型變速器的的結(jié)構(gòu)及性能，最終確定此變速器為中間軸式帶副箱的5+1擋變速器，即有五個(gè)前進(jìn)擋（包括超速擋）和一個(gè)倒擋，采用主、副箱結(jié)構(gòu),提高了軸的剛度。全部使用鎖環(huán)式同步器，使換擋更加平穩(wěn)，降低噪聲。為了與整車相配，通過設(shè)計(jì)與計(jì)算得應(yīng)該采用直接操縱機(jī)構(gòu)。
通過傳動(dòng)效率和傳動(dòng)比的設(shè)計(jì)計(jì)算初步確定變速器主要尺寸，再通過接觸強(qiáng)度和彎曲強(qiáng)度計(jì)算進(jìn)一步確定齒輪、軸、同步器等零部件的尺寸及材料。從而也可以估算出軸承等元件的壽命。
根據(jù)整車、離合器、汽車橫梁及傳動(dòng)軸等的形狀結(jié)構(gòu)可以確定變速箱箱體形狀，也可以確定變速箱與各相鄰部分的連接方法及結(jié)構(gòu)。確定變速器的位置及連接時(shí)應(yīng)該使變速器處于駕駛員最佳換擋位置。
關(guān)鍵詞：變速器，SUV，材料，傳動(dòng)比，強(qiáng)度
DIESEL-POWERED SUV——TRANSMISSION DESIGN
ABSTRACT
Automotive Transmission of the main purposes is to change the engine output torque and speed, so that it will be able to achieve speed and backwards motion, and the driver can not stop the engine work will stop and when not to stop parking engine moves the request.
This section is designed to meet the whole car requirements, which require maximum speed, maximum torque, the maximum power requirements of the SUV vehicle transmission. By analyzing various types of transmission of the structure and properties. This final coaxial transmission belt for the middle Vice box stall Transmission 5 +1, that is, five ahead stalls (including speeding stalls), and a Reverse. Adopt a main and vice- box structure, raised stalk of just degree.All adoption lock wreath type synchronous machines, is change to block Be getting more steady, lower noise.To match with the vehicle, through the design and calculation should be used in the direct control agencies.
Through the transmission efficiency of the transmission ratio and the calculation of the initial design of the main transmission to determine size, Then contact strength and bending strength calculation further define the gears, shafts, and other parts Synchronizer size and materials. Thus can be estimated bearings and other components of life.
According Vehicle, Clutch, motor and transmission beams and other structural shapes can be identified gearbox box shape, Transmission also can be identified with the adjacent part of the connection method and structure. Transmission to determine the location and connection should make the driver in the best transmission shift position
KEYWORDS : Transmission, SUV, Material, transmission ratio，Strength
目 錄
第一章 前言......................................1
第二章 方案選擇..................................2
§2.1概述...................................... 2
§2.2變速器傳動(dòng)機(jī)構(gòu)布置方案.....................3
第三章 變速器主要參數(shù)的初選......................4
§3.1擋數(shù).......................................4
§3.2傳動(dòng)比范圍.................................4
§3.3中心距.....................................4
§3.4外形尺寸...................................5
§3.5齒輪參數(shù)...................................5
§3.5.1一擋齒輪各參數(shù)的計(jì)算...................5
§3.5.2直接擋齒輪各參數(shù)的計(jì)算.................7
§3.5.3其它前進(jìn)擋齒輪參數(shù)的計(jì)算...............8
§3.5.4倒擋齒輪各參數(shù)的計(jì)算...................9
第四章 變速器的計(jì)算與校核.......................10
§4.1齒輪強(qiáng)度計(jì)算..............................10
§4.2軸的強(qiáng)度計(jì)算..............................14
§4.2.1軸的受力分析與計(jì)算....................15
§4.2.2軸的強(qiáng)度計(jì)算..........................17
§4.2.3軸的剛度計(jì)算..........................19
§4.3軸承壽命計(jì)算..............................20
第五章 變速器操縱機(jī)構(gòu)及結(jié)構(gòu)元件.................22
§5.1變速器操縱機(jī)構(gòu)............................22
§5.2變速器結(jié)構(gòu)元件............................22
第六章 結(jié)論.....................................25
參考文獻(xiàn).........................................26
致謝.............................................27
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