Mechanisms
Motion
movement that moving objects and mechanisms produce
Classification
Driving fource
the element that initiates the movement. It can be a spring, an electric motor or our own muscles
devices that transmit and convert forces and motion from a driving force or input element to an output element. They allow us to carry out certain tasks more easily and efficiently
Uses
entertaining children in the park
transporting people from A to B
telling the time
lifting and carrying objects
transmitting motion
linear
rotary
transforming motion
rotary to linear
rotary to reciprocating
controlling and regulating motion
joining elements
storing energy
Rotary motion mechanisms
Linear motion mechanisms
mechanisms that transmit motion and force in a straight line from one point to another
fixed pulley
Movable pulley
levers
rigid bar supported by a fulcrum
F x d= R x r
types
the resistance is between the fulcrum and the effort applied
the effort applied is between the fulcrum and the resistance
click to edit
the fulcrum is between the effort applied and the resistance
wheel that has a groove arount it into which a rope, chain or belt fits. It rotates around an axle that is fixed to an inmobile surface
it's balanced when F=R
it's a set of two pulleys, where one is fixed while the other can move in a linear direction
it's balanced when F = R: 2
Compound pulley
system of fixed and moveable pulleys, often called block and tackle
they transmit motion and effort in a circular way, from the input to the output
Friction drives
Pulleys with belt
Gear mechanisms and cog wheels
worm gear
Gear mechanisms with a chain
two or more wheels that are in contact
two pulleys or wheels that are acertain distance apart
screw that moves a helical cogwheel that is set perpendicular to the screw
sets of wheels with teeth called cogs
two cogwheels with paralell axles that are a certain distance apart
gear train
system of more than two gears connected together
Pulley trains with belts
system of pulleys or wheels, with a belt formed by more than two wheels
