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MECHANISMS (ROTARY MOTION MECHANISMS (FRICTION DRIVES (The ratio between…
MECHANISMS
ROTARY MOTION MECHANISMS
FRICTION DRIVES
The ratio between the rotation velocity of the wheels or pulleys depends on the relative size of the wheels
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GEAR TRAIN
The gear ratio between the drive wheel (1) and the driven wheel (4) depends on the number of geared teeth in the system
PULLEY TRAINS WITH BELTS
The gear ratio between the drive pulley (1) and the driven pulley (4) depends on the relative size of the pulleys in the system
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LINEAR MOTION MECHANISMS
LEVERS
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TYPES OF LEVERS
CLASS 1
The fulcrum is between the effort applied and the resistance. The effect of effort applied can be multiplied or reduced
CLASS 2
The resistence is between the fulcrum and the effort applied. The effect of the effort applied is always multiplied (d>r)
CLASS 3
The effort applied is between the fulcrum and the resistance. The effect of the effort applied is always reduced (d<r)
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COMPOUND PULLEY
This is a system of fixed and moveable pulleys, often called block and tackle
DEFINITION
Mechanisms are devices that and covert forces and motion from a driving force or input element to an output element