新疆大学毕业设计(论文)1摘要本课题要求是设计一种简单,经济实用的小型推土机(推雪),主要用于果园、菜地,院子等小面积地面作业。其关键问题就在于如何很好的实现推土(推雪)功能,尤其是传动系统、整体结构、工作装置的设计。推土(推雪)功能的实现是设计工作的一个很大的难点。推土机(推雪)工作时所产生的大量灰尘、噪音大和产品可靠性等方面也较难解决的问题。推土(推雪)范围的大小不仅与推土机(推雪)的各部分的尺寸有关,并与它的总体设计结构形式有关。工作部分机构小工作效率就会降低推土(推雪)范围也就变小,满足不了工作地点的要求,工作部分机构太大则设备就会太大从而增加机器负担。使推土机(推雪)难以提供足够的动力。因此合理的选择机构的大小及机构布置极为重要且比较困难。因此本次设计还存在一些不足,欢迎指正。关键词:推土机(推雪);传动系统;机构布置新疆大学毕业设计(论文)2AbstractThesubjectrequirementistodesignasimple,economicalandpracticalsmallbulldozers(snow),mainlyusedfororchards,vegetable,yard,andasmallareaofgroundoperations.Thekeyissueishowgoodbulldozing(snow),especiallythetransmissionsystem,theoverallstructureofthedevicedesign.Bulldozing(snow)functionisagreatdifficultyofthedesignwork.Bulldozer(snow)generatedbytheworkofalotofdust,noise,andproductreliabilityarealsomoredifficulttosolvetheproblem.Bulldozing(snow)thesizeoftherangeofnotonlythevariouspartsofthebulldozer(snow)relatedtothesizeandtheoveralldesignstructure.Bulldozingoftheworkofsomeinstitutionsworkefficiencywillbereduced(snow)rangewillbesmaller,cannotmeettherequirementsoftheworkplace,theworkofsomeinstitutionstoobigequipmentwilltherebyincreasingtheburdenofthemachine.Bulldozers(snow)isdifficulttoprovidesufficientpower.Reasonablechoiceforthesizeoftheinstitutionsandinstitutionalarrangementisextremelyimportantandmoredifficult.Thedesignalsohassomeshortcomings,andpleasecorrectme.Keywords:bulldozer(snow);transmissionsystem;agencyarrangement新疆大学毕业设计(论文)3目录摘要...............................................................1第1章绪论......................................................51.1国内农用推土机(推雪)发展概况..................................61.2国外小型推土机(推雪)发展概况..................................81.3选题的背景与意义................................................8第2章小型推土机(推雪机)的总体方案设计...............112.1设计主要技术要求...............................................112.2设计的数据要求.................................................112.3总体方案的确定.................................................112.4工作条件.......................................................12第3章原动机的选择..........................................133.1原动机选择.....................................................13第4章传动装置运动及动力参数计算.........................154.1分配传动比.....................................................154.2.运动和动力参数计算.............................................15第5章传动零件的设计计算...................................175.1.V带传动的设计.................................................175.1.1V带的设计....................................................175.1.2小带轮的设计.................................................205.1.3大带轮的设计.................................................215.2齿轮传动的设计.................................................215.3链传动的设计...................................................265.3.1链条的计算.............................