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MECHANISMS - Coggle Diagram
MECHANISMS
ROTARY MOTION
Friction drives
N, · D, = N,, · D,, ---> D, / D,, = N,, / N,
USES
Industry-Metal sheets/Rolls of paper
Video players-Moving video tape
Pulleys with belt
Two pulleys at a certain distance joined by a belt
They rotate in the same direction
USES
Industrial machines, vehicle engines, washing machines, drills
Cogwheels
Sets of wheels with teeth called cogs
USES
Industrial machinery, vehicles, domestic appliances
Worm gear
Screw that moves a helical cogwheel perpendicular to the screw
USES
Lap counters
Gear mechanisms with chains
Simultaneous rotation with
a metal chain or a toothed belt
This transmits graeter forces
without losing velocity
Gear train
More than two gears
N,,,,/N, = (Z, · Z,,,) / (Z,, · Z,,,,)
CLASSIFICATION
Controlling and regulating motion
Joining elements
Transforming
motion
Linear to rotary
Rotary to reciprocating
Storing energy
Transmitting motion
Linear
Rotary
USES
Lifting and carrying objects
Transporting people
Telling the time
Child entertainment
OTHER MECHANISMS
Controlling and directing motion
USES
Brakes
TYPES
Band
Drum
Disc
Storing energy
Spring
Connecting mechanisms
Clutchets
Fixed connections
Movable mechanisms
Supports
Bearings
Bushings
LINEAR MOTION
Levers
Rigid bars supported by a fulcrum
A balanced lever follows the law of the lever
F·d = R·r
Types
2
3
1
Pulleys
Movable pulley
F = R/2
Compound pulley
USES
Lifts, cranes
Fixed pulley
F = R
USES
Wells, gym equipment
MECHANISMS THAT
TRANSFORM MOTION
From rotary into linear
Rack and pinion system
USES
Bench drills, corkscrews, vehicle steering
Nut and
bolt system
Threaded bar
with a bolt of the
same diameter
Winch and crank handle
From rotary into reciprocating
Crank-Link-Slider
This is composed of a
crank and a rod called a
connecting rod or link.
Crankshaft
This is a rotating object that pushes a follower as it moves
Eccentric cam
DEFINITION
Mechanisms are 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 more efficiently
