linkages - mkontopoulos.com · 4-bar linkages think about: your windshield wipers. other...
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Uses of Linkages
A LINKAGE IS A MECHANISM IF TWO OR MORE LINKS MOVE WITH RESPECT TO A FIXED LINK.
LINKAGES CAN:
>Take an Input and produce a different Output>Alter the shape of motion (curves)>Change velocity, acceleration of motion>Apply Mechanical Advantage
Expect a lot of ROTATING, OSCILLATING and RECIPROCATING
4-BAR LINKAGESSimplest closed-loop kinematic links.
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4-BAR LINKAGESThink about: Your windshield wipers.
OTHERPantographs
Transfer, ScaleDrawing and Writing!
Make one quickly out of cardboard andimpresses people at parties.
Link: Nova Jiang
WALKINGKlann Linkage
For creepy, spider walking...Remember: Theo Jansen’s mechanism
OTHERThe Bell-Crank
OTHERHoekens Linkage
More approximate “Straight-Line Motion” but also makes a nice mushroom shaped curve.
OTHERAccordion Motion
Link
TRY IT OUT:
> Play around with linkage configurations.> Use a pencil to trace curves.
> Design a PANTOGRAPH to copy or scale motion >Can you figure out Mirror Writing?
> Combine linkages with gears and circles to make cranks, pistons, etc.
Web Resources for Linkage Analysis:
“Web Based Mechanism Design and Analysis”
“Mechanisms 101” Flash Applets
Cornell KMODDL Library. Linkage Tutorial/History