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Mechanisms - Coggle Diagram
Mechanisms
gears
bevel gear
rotates through 45 degrees
ratchet and pawl
only rotates in one direction
chain and sprocket
rotates in same direction strong
worm and worm wheel
high torque very slow
rack and pinion
rotation to linear motion
idler gear
used to change direction of rotation used to fill in gaps between driver and driven gear
spur gear
different sizes
compound gear train
gear sizes determines speed
motors
gearbox
set speed
expensive
stepper
used in cnc
servo
high torque
rotates through 180
inline
cheap
ideal for wheels
ratio 120:1
rotates 360 degrees
3v motor
small
ideal for fan
speakers
cams and followers
converts rotational motion to linear motion
straight line motion
many shapes
shape determines movement of follower
follower shape determines accuracy
piezo
ideal for single tones
micro speakers
plays tunes
buzzers
one sound
linkage
pulleys
idler pulley
allows for tension on pulley belts
regular pulley system
pulleys rotate in same direction
reverse pulley
changes directions using belt
stepped pulley
changes speed
transfers motion from two points
parallel linkage
