ASME - Human Powered Vehicle Challenge (HPVC) …...ASME-HPVC-Safety-Check-160525-ReducedQuality...
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Human Powered Vehicle Challenge (HPVC) Safety Check Illustrationsof Safe and Unsafe elements Published 5/25/2016 1
Transcript of ASME - Human Powered Vehicle Challenge (HPVC) …...ASME-HPVC-Safety-Check-160525-ReducedQuality...
HumanPoweredVehicleChallenge
(HPVC)SafetyCheckIllustrationsofSafeandUnsafeelements
Published5/25/20161
Outline
• RolloverProtectionSystem(RPS)• Harness/seatbelt• SteeringSystem• BrakingSystem• SharpEdges,protrusions,pinchpoints• Screws• Weldedjoints
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RolloverProtectionSystem(RPS)• Mustclearthehelmetoftallestrider• Mustpreventriderfromcontactwithground• Protectiononsidesandtopofvehicle
SatisfactoryCompositeRPSà Side&topprotection
SatisfactoryRPSà Clearshelmetbyseveralinches
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UnsatisfactoryRPSà Helmettouchesground
SatisfactoryRPSà NosidecontactNote:Inanaccident,flailing
legsandarmscouldstillcontacttheground
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UnsatisfactoryRPSà InadequateProtection
RPSàSinglePost
UnsatisfactoryRPSà InsufficientRPSheight
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Harness/SeatBeltSatisfactoryshoulder strapàWidthandattachment
Unsatisfactorylapbeltà Toonarrowà Should be46mmwide
Goodharnesssystem
Goodattachmentmethodà Boltedtoframe
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SteeringSystem• Nolooseness
• Allcomponentsstructurallysoundandsecurelyattached
• TierodswithadequatestiffnessUnsatisfactorysteeringarmweldà Safetycriticalcomponentà Reweld required topass
Unsatisfactoryhandlebarà Madeofconduità Insufficient strength
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TieRodsTierodsshouldbestrongandstiffenoughtopreventbucklingTubes,particularlylargerdiametertubes,workwell
GoodTieRoddesignà Tubularwithadequate
diameterPoorTieRoddesignàLong, small-diameterrodàPronetobuckling
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BrakingSystem
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Unsatisfactoryadjustmentà Levertoucheshandlebar
UnsatisfactoryàNofrontbrakeàFrontbrakeprovidesmuchmorebrakingforcethanrearbrake Satisfactoryadjustment
à Thumbfitsbetweenleverandhandlebar
OpenTubeEnds• Opentubeendsmustbeclosed• Handlebarplugsmustbeinstalled• Plasticormetalplusworkwell
Unsatisfactoryà Opentubeswillfailsafety
GoodsolutionàHandlebarendplugàPlastictubeplug
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OpenTubeEndsMarginallySatisfactoryà Tapeopenendssecurely
AcceptableàSecurelytapefoamplugàSecurelytapetennisballorsimilaràEnsuresafetyaccommodationsareobvious tospeedupyoursafetycheck
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Screws Suspension screwmissingnut
Nuts/screwsmustbeproperlysecured.àPropertorqueàThreadlockingcompoundàLockingdeviceorlockwire
MarginallyAcceptableàTubingcoversscrewà Betterthantape
UnsatisfactoryàMorethan3threadsexposed
Bestà Lessthan3threadsexposed
AcceptableàSecondnut12
SharpEdges
Betterà Cornersrounded
Unsatisfactoryà Sharpedgesjustinfront
ofseat
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Poorpenetration,onesideweld
Welds
Unsatisfactoryweldà Poorpenetrationà Visiblegaps
Unsatisfactoryweldà Poorpenetrationà Weldononesideonlyà Seat/Harnessattachmentissafety
criticalcomponent!
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ContactInformation
QuestionsaboutsafetycanbedirectedtotheHPVCforum:https://groups.google.com/forum/#!categories/asme-hpvc/design-and-safety
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ThankstoMarkArchibald
MarkArchibaldcreatedthissetofslidesafterservingasthesafetyjudgeattheHPVCEast2016.MarkisaprofessoratGroveCityCollegeandisthepastChiefJudgeandpastChairoftheHPVC.Heisawealthofknowledgeabouthumanpoweredvehiclesandwegreatlyappreciatehiscontributions.
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