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畢業(yè)設(shè)計(jì)論文驅(qū)動(dòng)橋變速器同步器齒輪取力器(完整版)

  

【正文】 stem can be used is by connecting the ring gear 本科生畢業(yè)設(shè)計(jì)(論文)39to the input shaft ing from the engine, connecting the pla carrier to the output shaft, and locking the sun gear so that it can39。本科生畢業(yè)設(shè)計(jì)(論文)36附錄一外文翻譯A Short Course on a part of Automatic Transmissions The automatic transmission gearbox, as an important part in automobile driving system is used to make up the shorting of engine torque and rotary speed. It can change the vehicle speed and tyre torque in a big scope, cut off the power transfer from the engine, and also provides a reverse traveling direction for the vehicle. Therefore, the reasonability of the structure design of a transmission gearbox directly affects the vehicle39。同時(shí),運(yùn)用MATALAB軟件編程,進(jìn)行校核。我所設(shè)計(jì)的變速器為 5+1 檔專用汽車變速器。本科生畢業(yè)設(shè)計(jì)(論文)30傳動(dòng)比的計(jì)算和齒數(shù)的確定:按發(fā)動(dòng)機(jī)的最大轉(zhuǎn)矩時(shí)的輸出轉(zhuǎn)速來(lái)確定傳動(dòng)比,因而有 ?總i設(shè)輸出軸齒輪的齒數(shù)為 20輸出軸一級(jí)齒輪的齒數(shù)為 18輸出軸二級(jí)齒輪的齒數(shù)為 14齒輪的模數(shù)為直齒齒輪取 m=4,斜齒輪 m=變速箱內(nèi)一對(duì)常嚙合齒輪的傳動(dòng)比為 ??Zi齒輪的材料為 40Cr,初選精度為 8 級(jí)。根據(jù)取力裝置相對(duì)于汽車地盤變速器的位置,取力裝置的取力方式可分為前置、中置和后置三種基本類型。防止了在汽車前進(jìn)時(shí)誤掛倒擋,而導(dǎo)致零件損壞,起到了倒擋鎖的作用。變速器自鎖、互鎖、倒擋鎖裝置:自鎖裝置:掛擋后應(yīng)保證結(jié)合套于與結(jié)合齒圈的全部套合(或滑動(dòng)齒輪換擋時(shí),全齒長(zhǎng)都進(jìn)入嚙合) 。為了保證變速器的可靠工作,變速器操縱機(jī)構(gòu)應(yīng)能滿足以下要求:(1)掛擋后應(yīng)保證結(jié)合套于與結(jié)合齒圈的全部套合(或滑動(dòng)齒輪換擋時(shí),全齒長(zhǎng)都進(jìn)入嚙合) 。本科生畢業(yè)設(shè)計(jì)(論文)12第四章 變速器中間軸的校核軸的校核是評(píng)定變速器是否滿足所要求的強(qiáng)度、剛度等條件,是否滿足使用要求,是設(shè)計(jì)過(guò)程中的重要步驟,主要是為了對(duì)設(shè)計(jì)的數(shù)據(jù)校核,達(dá)到設(shè)計(jì)的要求。5 同步器鎖差的確定由于同步器鎖銷差大換檔沉,鎖銷差小換檔輕便,所以應(yīng)選擇合適的鎖銷差,一般取鎖銷差為 ~。2 同步環(huán)錐面直徑和寬度的確定在中間軸結(jié)構(gòu)允許的情況下,為了增大錐面間的摩擦力矩,縮短同步時(shí)間,同步環(huán)錐面直徑應(yīng)盡量取大值。鎖銷式同步器的結(jié)構(gòu)見(jiàn)圖 2。變速器的換擋操作,尤其是從高擋向低擋的換擋操作比較復(fù)雜,而且很容易產(chǎn)生輪齒或花鍵齒間的沖擊。時(shí)0f0a17mininZZ???采用非變位齒輪,變位系數(shù)為 0?? 齒輪齒寬的設(shè)計(jì)計(jì)算在選擇齒寬時(shí),應(yīng)該注意齒寬對(duì)變速器的軸向尺寸、齒輪工作平穩(wěn)性、齒輪強(qiáng)度和齒輪工作時(shí)受力的均勻程度等均有影響。斜齒輪的螺旋角可在下面提供的范圍內(nèi)選用:中型專用汽車變速器為本科生畢業(yè)設(shè)計(jì)(論文)618176。 齒輪壓力角的選擇為減少工作噪聲和提高強(qiáng)度,汽車變速器齒輪多數(shù)用斜齒輪,只有倒檔齒輪及貨車一檔采用直齒輪。為了防止汽車行駛時(shí)誤掛倒擋,在導(dǎo)快上裝有帶彈簧的安全止柱。使用同步器能保證換擋迅速、無(wú)沖擊、無(wú)噪聲,得到廣泛應(yīng)用。但也有缺點(diǎn),除直接擋外其他各擋的傳動(dòng)效率有所降低。本科生畢業(yè)設(shè)計(jì)(論文)2第二章 變速器結(jié)構(gòu)概述變速器設(shè)計(jì)方案要求從使用性能、制造條件和重量、價(jià)格性價(jià)比等多方面考慮,要求滿足制造、使用、維修等條件。在發(fā)動(dòng)機(jī)轉(zhuǎn)矩方向不變的前提下,實(shí)現(xiàn)汽車的倒退行駛。關(guān)鍵詞:變速器,同步器,齒輪,取力器本科生畢業(yè)設(shè)計(jì)(論文)IIAbstractTo change the engine used to spread transmission of torque and wheel speed, the aim of starting in place, climb, turn and accelerate a variety of driving conditions, different vehicle traction and speed, while the engine in the most favorable range , the reasonability of the structure design of a transmission gearbox directly affects the vehicle39。為了使該變速器應(yīng)用范圍更加的廣泛,應(yīng)用到不同工程上,使得本變速器帶有取力器。設(shè)計(jì)要求達(dá)到換擋迅速、省力、方便、有較高的工作效率、工作噪聲低。在設(shè)計(jì)過(guò)程中,利用 CAXA 繪圖,運(yùn)用 MATALAB 軟件編程。在這種情況下,傳動(dòng)裝置的設(shè)計(jì),不但要滿足動(dòng)力性和經(jīng)濟(jì)性指標(biāo),而且要求結(jié)構(gòu)緊湊、尺寸小、重量輕、傳動(dòng)效率高、工作可靠、壽命長(zhǎng)、噪音低等。由于每擋齒輪組的齒數(shù)是固定的,所以各擋的變速比是定值。因此,直接擋的傳遞效率高,磨損及噪聲也最小,這是三軸式變速器的優(yōu)點(diǎn)。(3)換擋型式:有直齒滑動(dòng)齒輪換擋、嚙合套換擋和同步器換擋三種型式。我目前的方案為除了變速器二軸長(zhǎng)嚙合齒輪與二軸之間的軸承以及取力器一軸采用滾針軸承外,其余的軸承均采用深溝球軸承。降低噪聲對(duì)轎車有意義,減輕質(zhì)量對(duì)貨車比較重要。其次,斜齒輪傳遞轉(zhuǎn)矩時(shí),要產(chǎn)生軸向力。而對(duì)于斜齒輪 , 是當(dāng)量直齒標(biāo)準(zhǔn)齒輪不發(fā)生根切的i ?3cosvminvZ最小齒數(shù)。而輸入端在接觸錐面上產(chǎn)生的摩擦力矩作用下,克服輸入端被接合零件的等價(jià)慣性力矩,在最短時(shí)間內(nèi)使輸入端與輸出端的轉(zhuǎn)速達(dá)到同步?! 〗雍咸?、同步鎖環(huán)和待接合齒輪的齒圈上均有倒角(鎖止角),同步鎖環(huán)的內(nèi)錐面與待接合齒輪齒圈外錐面接觸產(chǎn)生摩擦。一般油槽寬為 2mm~4mm,數(shù)量 30 個(gè)~40 個(gè)。根據(jù)摩擦錐面平均半徑 R 錐、摩擦系數(shù) μ、錐面角 α 和撥環(huán)半徑 R 鎖來(lái)確定合適的鎖銷角 β,通常取 β=35176。為了防止變速器在工作中自動(dòng)脫檔,高通用性,有時(shí)變速器中幾組鎖銷式同步器要選用相同的同步器。軸的全撓度為 ; 2scff??在其作用下應(yīng)力為 3dMW??M~ ,W~為抗彎截面系數(shù)。直接操縱手動(dòng)換擋變速器:當(dāng)變速器布置在駕駛員座椅附近,可將變速桿直接安裝在變速器上,并依靠駕駛員手力和通過(guò)變速桿直接完成換擋功能的手動(dòng)換擋變速器,稱為直接操縱變速器?;ユi鎖裝置 :當(dāng)中間換擋撥叉軸移動(dòng)掛擋時(shí),另外兩個(gè)撥叉軸被鋼球瑣住。再有就是可實(shí)現(xiàn)系列化,盡量能滿足三化的要求。我所設(shè)計(jì)的取力器采用雙聯(lián)齒輪,同時(shí)考慮窗口的尺寸與形狀。mm)gK —齒寬系數(shù)cK —應(yīng)力集中系數(shù),直齒輪 K =? ? 斜齒輪 K =K —重合度影響系數(shù),主動(dòng)齒輪 K = 從動(dòng)齒輪 K = f fK —重合度影響系數(shù),K =2? ?y—齒形系數(shù)取力器一軸雙聯(lián)齒輪二級(jí)齒輪的校核 mNTg??390max4???K1.?fb=25 ? 2472893max?dMFet N/mm N/?ybKFtfw? ??80~?2所以強(qiáng)度合格。為了使得汽車能夠適應(yīng)于不同工程的需要,使得汽車的應(yīng)用范圍更加的廣泛,本變速器帶有取力器。由于各位老師的幫助,使我們對(duì)畢業(yè)設(shè)計(jì)更加感興趣,使我們更加有信心地完成這次的畢業(yè)設(shè)計(jì)。t move. In this scenario, when we turn the ring gear, the plas will walk along the sun gear (which is held stationary) causing the pla carrier to mm the output shaft in the same direction as the input shaft but at a slower speed causing gear reduction (similar to a car in first gear). If we unlock the sun gear and lock any two elements together, this will cause all three elements to turn at the same speed so that the output shaft will mm at the same rate of speed as the input shaft. This is like a car that is in third or high gear. Another way that we can use a Plaary gear set is by locking the pla carrier from moving, then applying power to the ring gear which will cause the sun gear to turn in the opposite direction giving us reverse gear. The clutch pack is used, in this instance, to lock the pla carrier with the sun gear forcing both to turn at the same speed. If both the clutch pack and the band were released, the system would be in neutral. Turning the input shaft would turn the pla gears against the sun gear, but since nothing is holding the sun gear, it will just spin free and have no effect on the output shaft. To place the unit in first gear, the band is applied to hold the sun gear from moving. To shift from first to high gear, the band is released and the clutch is applied causing the output shaft to turn at the same speed as the input shaft. Many more binations are possible using two or more plaary sets connected in various ways to provide the different forward speeds and reverse that are found in modem automatic transmissions. Some of the clever gear arrangements found in four and now, five, six and even sevenspeed automatics are plex enoug。我們會(huì)更加努力的學(xué)習(xí)和工作,在實(shí)踐中不斷的收集資料、積累經(jīng)驗(yàn),絕不辜負(fù)老師對(duì)我們的期望。在設(shè)計(jì)過(guò)程中,利用CAXA繪圖。根據(jù)設(shè)計(jì)的目的、方法和步驟,我在長(zhǎng)春第一汽車制造廠實(shí)習(xí)的時(shí)候?qū)夥牌囎兯倨鬟M(jìn)行了調(diào)研,收集數(shù)據(jù),然后在圖書館和網(wǎng)上尋找資料。該動(dòng)力輸出采用兩級(jí)齒輪傳動(dòng),中間為雙聯(lián)齒輪。因此,取力裝置在專用汽車的設(shè)計(jì)和制造方面顯得尤為重要。倒擋鎖裝置 :當(dāng)換擋桿下端向倒擋撥叉軸移動(dòng)時(shí),必須壓縮彈簧才能進(jìn)入倒擋撥叉軸上的撥塊槽中。近年來(lái),單軌式操縱機(jī)構(gòu)應(yīng)用較多,其優(yōu)點(diǎn)是減少了變速叉軸,各擋同用一組自鎖裝置,因而使操縱機(jī)構(gòu)簡(jiǎn)化,但它要求各擋換擋行程相等。 中間軸常嚙合齒輪處進(jìn)行校核 ; ?? ???rZTFen ???nF本科生畢業(yè)設(shè)計(jì)(論文)13 ??????F ;mamb923?所以 .. 48521 ?EILfc ~5.? ???IbaFfs rad????. 48645???EIL? 合格rad02.?mNFMc ???? 7653816ZTen ?9092max 23223 ??????? ; 合格??240mN???? 對(duì)中間軸四擋齒輪處進(jìn)行校核 ; ?? ???rZTFen ???nFN1isi2 ;ma04?b435??所以 ???EILfc 合格.~5.? ?IbaFfs 本科生畢業(yè)設(shè)計(jì)(論文)14????052.. ??
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