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《機(jī)械畢業(yè)設(shè)計(jì)（論文）-履帶牽引車輛變速器改進(jìn)設(shè)計(jì)（全套圖紙）》由會員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、履帶牽引車輛變速器改進(jìn)設(shè)計(jì)摘要本設(shè)計(jì)為履帶牽引車輛變速器的改進(jìn)設(shè)計(jì)。變速器的功用是：改變傳動比，擴(kuò)大驅(qū)動輪轉(zhuǎn)矩和轉(zhuǎn)速的變化范圍，同時使發(fā)動機(jī)在有利的工況下工作；在發(fā)動機(jī)旋轉(zhuǎn)方向不變的前提下，使拖拉機(jī)能倒退行駛；利用空檔，中斷動力傳遞。變速器的設(shè)計(jì)滿足必要的動力性和經(jīng)濟(jì)性指標(biāo)。本改進(jìn)型變速箱為了簡化結(jié)構(gòu)，減少齒輪數(shù)量采用空間多軸組成式結(jié)構(gòu)，主變速在前、區(qū)段換檔副變速在后來實(shí)現(xiàn)4（3＋1）檔；為了提高齒輪傳動嚙合質(zhì)量采用嚙合套換檔，常嚙合斜齒圓柱齒輪傳動；主、副變速采用兩根變速桿分別操縱，采用自鎖及互鎖裝置、倒檔安全裝置，可使操縱可靠，不跳檔、亂檔、自
2、動脫檔和誤掛倒檔，為了保留一定的工藝?yán)^承性和能投入的較少，保持原來變速箱孔中心距及相對位置不變。為了必要的分析拖拉機(jī)的牽引性和燃料的經(jīng)濟(jì)性本設(shè)計(jì)還繪制了拖拉機(jī)的牽引特性曲線，在說明書的校核部分，主要對齒輪的彎曲疲勞強(qiáng)度和接觸疲勞強(qiáng)度，軸的剛度和強(qiáng)度以及軸承的壽命進(jìn)行了計(jì)算，設(shè)計(jì)的零件均滿足要求。關(guān)鍵詞：變速器，組成式結(jié)構(gòu)，牽引特性，嚙合套33TheimprovementofthetrackdrawsthevehiclegearboxAbstractOriginallydesignedtheimprovementthatthetrackdrawsth
3、evehiclegearboxtodesign.Thefunctionofthegearboxis:Itchangebytransmissionthan,expandbytorqueandthechangerangesofrotationalspeeddrivewheel,moremakeengineunabletoworkatfavorableoperatingmodeatthesametime;Underthecircumstancesthattheenginerotatestheprerequisitethatthedirectiondoes
4、notchange,enabletractortofallbackandgo;Utilizethenoloadposition,cutoffmotiveforcetotransmit.Essentialmotiveforceandeconomicindexthatthedesignofthegearboxissatisfied.Originallytheimprovingtypegearbox,inordertosimplifythestructure,itislastaxlemakinguptypestructuresmanynottoreduc
5、ebygearwheelthequantities,itchangespeedmainlyinbefore,changesectoritisvicethatifchangingspeed,realizelatertoshelf4(3+1)Shelf;Forimprovegearwheeltransmissionmeshingqualityadopt,clenchtheteethsetchangeshelf,clenchtheteethobliquetoothcylindergearwheeltransmissionoften;Mainfact,pa
6、irchangespeed,adopttwogearshiftlevershandleseparately,adoptfromthelockandlockthedevice,pourthesafetydeviceoftheshelfeachother,canmake,handlereliable,jumptheshelf,haphazardshelf,automaticandoutofsupplyandhangingandpouringtheshelfbymistake,itislessinordertokeepcertaincraftsucces
7、sionandcanbeputinto,theholecentre-to-centrespacingofgearboxandrelativepositiondidnotchangethatkeptoriginally.33Andeconomyoffueloriginallydesignandalsodrawdrawingthecurveofcharacteristicofthetractorforessentialanalysispersonwhodrawoftractor,inthecheckpartofthemanual,thecrookedf
8、atiguestrengthandcontactingfatiguestrengthmainlytothegearwhee
