Transcript Mechanisms From Simple Machines

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Mechanisms
From Simple Machines
UNIVERSAL JOINT
Transmits power when two shafts are not in line.
Two spur gears reduce speed, increase torque and change
the rotational direction of the shafts.
The addition of a third gear, the middle idler gear, has no
effect on speed and torque, but input and output shafts turn in
the same direction.
RACK & PINION
Rack (in red) & pinion (in black) converts rotary motion
of the pinion gear to linear motion of the rack. It is a
reversible, positive drive with no slipping.
CROWN & PINION
Crown & pinion gears reduce speed and increase torque. The
output shaft is at a 90-degree angle to the input shaft. The
gears rotate in opposite directions.
BEVEL GEARS
Bevel gears increase torque or speed. The output shaft is
at a 90-degree angle to the input shaft. The gears rotate in
opposite directions.
WORM GEAR
The worm gear increases torque and reduces speed. The
output shaft is at a 90-degree angle to the input shaft. Direction
of rotation can be reversed, but the output gear cannot drive
the worm gear.
CAM
As a cam rotates the flat follower is raised and
lowered, converting rotary motion to linear motion.
FOLLOWER
CAM
LOBE
CHAIN & SPROCKET
Chain and sprocket apparatus increases speed or torque
and can run in reverse direction with no slipping. Input and
output shafts rotate in the same direction.
PULLEY & BELT
A pulley and belt drive can increase torque or speed and can
run in reverse. Input and output shafts are parallel and rotate
in the same direction. Slipping of the belt may occur.
MOTOR DRIVEN WORM
A motor driven worm reduces speed and increases torque. The
output shaft is at a 90-degree angle to the input shaft. Direction
of motion is reversible, but the output gear cannot turn the worm
gear.
MOTOR DRIVEN PULLEY & BELT
A motor driven pulley and belt drive can increase torque or
speed. Input and output shafts are parallel and rotate in
the same direction. Slipping of the belt may occur.
CRANK THROW & SLIDER
A crank throw and slider converts rotary motion to linear
motion. Direction of rotation is reversible. Input and output
shafts are at 90-degrees.
WHEEL & SLIDER
A wheel and slider converts rotary motion of the wheel to
linear motion of the slider. Direction of rotation can be
reversed. Input and output shafts are at 90-degrees.
SCREW & LEVER
A screw and lever converts rotary motion to linear motion
and increases torque. Direction of rotation is reversible.