机械5

中间输出机械齿轮齿条式转向器设计 摘要 本设计主要设计一种新型的中间输出机械齿轮齿条式转向器。首先分析齿轮齿条式转向器在实际工作中受各种因素的影响，分析其工作环境，同时对转向系的空间位置及结构特点进行适当的分析，最终确定转向梯形的型式，然后简单地概述转向传动的机构。最后确定转向器的结构和布置形式，分析了转向器的啮合传动的特点和传动效率，对转向器的零部件尺寸进行计算。根据对转向器进行设计，并对齿轮齿条的齿面接触强度和齿根弯曲强度进行校核，同时利用Solidworks2013与AUTOCAD2015软件绘制装配图和零件图。算出转向器的各零部件的大小尺寸，对整个转向器的结构进行有限元受力分析，找出不合理的结构部位并加以改进。 关键词：齿轮；转向器；传动机构 I
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nical gear rack type steeri
ng gear desig
n ABSTRACT This desig
n is mai
nlydesig
n a
newtype of i
ntermediate output mecha
nical gear rack type steeri
ng gear.Paper first a
nalysis of the gear rack type steeri
ng gear is affected byvarious factors i
n the actualwork,a
nalyzes itsworki
ng e
nviro
nme
nt,the space positio
n of steeri
ng system a
nd structure characteristics of proper a
nalysis,fi
nallydetermi
ne the type of steeri
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n simplysummarize steeri
ng tra
nsmissio
n mecha
nism.Fi
nallydetermi
ne the structure a
nd layout of steeri
ng,a
nalysis of the steeri
ng gear meshi
ng tra
nsmissio
n characteristics a
nd tra
nsmissio
n efficie
ncyof the steeri
ng parts size is calculated.Accordi
ng to the desig
n of steeri
ng a
nd the tooth surface of gear rack co
ntact stre
ngth a
nd tooth root be
ndi
ng stre
ngth checki
ng,at the same time usi
ng Solidworks2013 a
nd AUTOCAD2015 software drawthe assemblydrawi
ng a
nd part drawi
ng.Calculate the size of parts of steeri
ng gear,structure of the steeri
ng gear fi
nite eleme
nt stress a
nalysis,fi
nd out the u
nreaso
nable parts of structure a
nd improved. Keywords: Gear;The steeri
ng gear;Tra
nsmissio
n mecha
nism 目录 1绪论 1.1背景简介………………………………………………………………………………1 1.1.1国内外研究状况………………………………………………………………1 1.2设计目的………………………………………………………………………………1 2齿轮齿条式转向器的设计与分析…………………………………………………………3 2.1齿轮齿条式转向器的使用参数………………………………………………………4 2.2转向器的设计……………………………………………………………………………4 2.2.1转向器类型………………………………………………………………………4 2.2.2转向器的类型选择与设计………………………………………………………4 2.2.3转向器的类型选择与设计………………………………………………………7 2.2.4齿轮齿条转向器计算载荷的确定………………………………………………8 2.2.5初步确定齿轮的基本参数和主要尺寸……………………………………………9 2.2.6确定齿轮传动主要参数和几何尺寸…………………………………………………13 2.2.7齿轮齿条式转向器的综合分析设计及计算…………………………………………14 2.2.8齿轮轴强度校核………………………………………………………………………17 2.3转向梯形机构选择与计算……………………………………………………………19 2.3.1转向梯形机构方案分析………………………………………………………………21 2.3.2转向梯形机构数学模型分析…………………………………………………………21 2.3.3转向传动机构的设计………………………………………………………………24 3.1转向器的最终设计方案…………………………………………………………………31 3.2爆炸图……………………………………………………………………………………32 4总结…………………………………………………………………………………………34 参考文献……………………………………………………………………………………35 致谢…………………………………………………………………………………………36