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MECHANISMS (Rotary motion mechanisms (Gear mechanisms and cogwheels (Sets…
MECHANISMS
What are they?
Devices that transmit and convert forces and motion for a driving force or input element to an output element
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How do they move?
The motion produced by a motor is transformed and converted by the mechanisms to receiving elements, so that they can do the job for which they were constructed
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Linear motion mechanisms
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Fixed pulley
Wheel that as a groove around it into which a rope, chain or belt fits, it rotates around an axle that is fixed to an inmobile surface
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Movable pulley
System of fixed and movable pulleys ( block and tackle ), we use more pulleys, the system is more complex, it need less effort
Rotary motion mechanisms
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Friction drives
Made up of two or more wheels, the first wheel is the primary drive wheel and it moves and turns the second wheel (output wheel)
The ratio between the rotation veloaty of the wheels or pulleys depends on the relative size of the wheels.
Pulleys with belt
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Uses: industnal machines, vehicle engines, washing machines and dulls
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Worm gear
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Each time the screw rotates, the gear moves forward as many teeth as
there are grooves in the screw, usually a small number I, 2 or 3; this is used to reduce velocity as well as functioning as a brake system.
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Pulley trains with belts
It's a system of pulleys, or wheels, with a belt
formed by more than two wheels
The gear ratio beetween the drive pulley and the driven pulley depends on the relative size of the pulleys in the system
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