机械网-宇通ZK6579校车转向系统设计(英文版)(含CAD零件装配图)--机械机电

宇通ZK6579校车转向系统设计(英文版)(含CAD零件装配图)(任务书,开题报告,外文翻译,文献摘要,论文说明书英文版8500字,CAD图5张)

DesignofsteeringsystemofYutongZK6579Schoolbus

Abstract

Withtheincreasingpopularityofschoolbuses,peoplepaymoreandmoreattentiontothesafetyofschoolbuses.Thedesignofareasonableschoolbussteeringsystemisofgreatsignificancetoensurethesafetyofstudents.

ThispapertakestheYutongschoolbusastheresearchobjectandcomparestheadvantagesanddisadvantagesofdifferentsteeringsystems.Andthenaccordingtotheactualsituationoftheschoolbus.Thehydraulicpowersteeringsystemofgearandrackisdesigned.

Themaincontentsofthispaperincludecomparingdifferenttypesofsteeringgearandpowersystem,thedesignschemeisselectedaccordingtothespecificsituationofYutongschoolbus,andfinallythegearracksteeringgearandhydraulicpowersystemareselected.Italsoincludestheselectionandcalculationoftheparametersofgearracksteeringgear.Thehydrauliccylinder,steeringvalveandpistonstrokeintheassistsystemarecalculated.Finally,thestrengthofthemaincomponentsinthesteeringsystemiscarriedout.Itincludescheckingthetoothsurfacecontactfatiguestrengthandthetoothrootbendingfatiguestrengthofthegearrack.Finally,theassemblydrawingandpartdrawingofthewholesteeringsystemaredrawn白癜风的问题.

Keywords:schoolbus;steeringsystem;hydraulicpower;rackandpinion;strengthcheck

Mainparametersofdesigntargetvehicle

Table2.1basicparametersofYutongSchoolbus

Length×width×height(mm)5740×1920×2580

Wheelbase3300mm

Frontwheeldistance1606mm

Fullloadmass4070kg

Numberofsteeringwheelturns2.5

Steeringwheeldiameter450mm

Fronttirespecification205/55R16

Maximumspeed80km/h

Tirepressure0.255Mpa

LoaddistributionoffrontandrearaxlesFrontaxleRearaxle

Fullload40.00%60.00%

Catalogue

Chapter1:Introduction1

1.1ThepurposeandsignificanceofsubjectResearch1

1.2Researchstatusathomeandabroad1

1.2.1Researchstatusofsteeringsystem1

1癫痫的幻觉总结大全.2.2Researchstatusofsteeringgear4

1.3Requirementsforsteeringsystems5

1.4Theresearchcontentofthissubject5

1.5Expectedtarget6

Chapter2:DeterminationofmainbodyDesignSchemeandparameters7

2.1Requirementsforpowersteeringmechanisms7

2.2SelectionofGearandRacksteeringgear7

2.3Mainparametersofdesigntargetvehicle8

2.4Calculationofsteeringangleandsteeringsystemangletransmissionratio8

2.5Summaryofthischapter9

Chapter3DesignofMechanicalpartofsteeringGear10

3.1DesignofgeometricsizestructureofGearandRack10

3白癜风308照光后蜕皮的原因是什么.2TherelationshipbetweenGearandRackgeometricTransmission10

3.3Summaryofbasicparametersofgearandrack12

3.4Gearstrengthcheck13

3.4.1Toothsurfacecontactstrength13

3.4.2Checkofcontactfatiguestrengthoftoothsurface14

3.4.3Toothrootbendingfatiguestrength14

3.4.4Checkoftensilestrengthofrackcompressionbar15

3.5Summaryofthischapter16

Chapter4Designofhydraulicassistsystem17

4.1Compositionandprincipleofhydraulicpowersteeringsystem17

4.11CompositionofrotatingValvehydraulicpowersteeringsystem17

4.12principleofhydraulicpowersteeringsystem18

4.2DesignandcalculationofpowercylinderofhydraulicAuxiliarysystem18

4.2.1Ratedpressureofhydraulicsystempn18

4.2.2Totalefficiencyofhydrauliccylinder19

4.2.3TheoreticalForceofhydrauliccylinderF19

4.2.4CylinderinnerdiameterD19

4.2.5CalculationofWallthicknessofpowercylinder19

4.2.6pistonstrokeS20

4.2.7Minimumguidelength20

4.3DesignandcalculationofrotatingValveControlValve20

4.3.1Factorsaffectingthecharacteristicsofrotatingvalve20

4.3.2Designofspooledge21

4.3.3Limitingmechanism21

4.4Designofsteeringbaranditsend22

4.5Rackclearanceadjustingdevice22

4.6Torsionbardesign23

4.7Steeringcontrolmechanismdesign24

4.8Summaryofthischapter25

Conclusion26

Reference27

Thanks29