Mountain Bike Rear Mountain Bike Rear SuspensionSuspension
ME 493 Final Presentation – ME 493 Final Presentation – 20042004
Group Members:Group Members:Heather LandisHeather Landis
David HarrisDavid HarrisLuther BealeLuther Beale
Chris Polinsky Chris Polinsky
Academic Advisors:Academic Advisors: Dr. Chien WernDr. Chien Wern Dr. David TurcicDr. David Turcic
Mission StatementMission Statement
To design a new To design a new mountain bike rear mountain bike rear suspension system suspension system that responds to that responds to terrain inputs while terrain inputs while minimizing minimizing response to rider response to rider inputs better than inputs better than existing systems.existing systems.
TopicsTopics
Linkage SynthesisLinkage Synthesis ModelModel Simulations and AnalysisSimulations and Analysis Prototype and EvaluationsPrototype and Evaluations
ResearchResearch
Project Definition Project Definition Patents and SimulationsPatents and Simulations
Ideal Axle PathIdeal Axle Path
Working Model Working Model SimulationSimulation
Linkage Linkage Simulations of Simulations of Existing Existing DesignsDesigns
Ideal Axle Paths
-0.02
0.00
0.02
0.04
0.06
0.08
0.10
0.12
-0.025 -0.02 -0.015 -0.01 -0.005 0
Rearward Axle Movement (mm)
Ver
tica
l A
xle
Mo
vem
ent
(mm
)
100mm Bump
50mm Bump
Optimum Path
Linkage Synthesis and Linkage Synthesis and DesignDesign
Hoeken Four-Bar Hoeken Four-Bar LinkageLinkage
Goals and Goals and ConstraintsConstraints DrivetrainDrivetrain Wide Range of SizesWide Range of Sizes Reduced InteractionReduced Interaction
Solid ModelSolid Model
Solid Model ComponentsSolid Model Components
SimulationsSimulations
Working ModelWorking Model Constrained FrameConstrained Frame Full BikeFull Bike DroppingDropping
SimulationsSimulations
Constrained Constrained FrameFrame
SimulationsSimulations
Full BikeFull Bike
SimulationsSimulations
DroppingDropping
SimulationsSimulationsForce Analysis at the Pin Joints as the System Travels Over a 4 in curb at 40 MPH
-2000
-1500
-1000
-500
0
500
1000
1500
2000
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45
Travel Time (s)
For
ce (
lbs
)
Force of Pin Joint 172 Fx
Force of Pin Joint 172 Fy
Force of Pin Joint 569 Fx
Force of Pin Joint 569 Fy
Force of Pin Joint 479 Fx
Force of Pin Joint 479 Fy
Force of Pin Joint 170 Fx
Force of Pin Joint 170 Fy
Force of Pin Joint 852 Fx
Force of Pin Joint 852 Fy
Force of Pin 174 Fx
Force of Pin 174 Fy
Force of Pin Joint 1176 Fx
Force of Pin Joint 1176 Fy
Finite Element Analysis Finite Element Analysis (FEA)(FEA)
Forces from Forces from Working ModelWorking Model Bottom BracketBottom Bracket
Finite Element Analysis Finite Element Analysis (FEA)(FEA)
Forces from Forces from Working ModelWorking Model ChainstayChainstay
Finite Element Analysis Finite Element Analysis (FEA)(FEA)
Forces from Forces from Working ModelWorking Model SeatstaySeatstay
ManufacturingManufacturing
ManufacturingManufacturing
AssemblyAssembly
AssemblyAssembly
Thank youThank you
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