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MECHANISMS (Rotary motion mechanisms (These mechanisms transmit motion and…
MECHANISMS
Rotary motion mechanisms
These mechanisms transmit motion and effort in a circular way,from the input to de output.They include friction drives,pulley systems, gears and worm gears
friction drives are made up of two ore more wheels that are in contact.The first wheel is called the primary drive wheel
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gear train
This is a system of more than two gears, connected together as shown in the diagram
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pulley trains with belts
it is a system of pulleys,or wheels,with a belt formed by more than two wheels.
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pulleys
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Fixed pulleys
A fixed pulley is a wheel that has a groove for a rope, cham or belt to go round lt. It rotates around an axle that ls fixed to an immobile surface. This reduces the load.R when elfort, f, is applied
R when elfort, f, is applied equal to the load. R: F = R
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Compound pulleys
This is a set of fixed and moveable pulleys, often called a block and tackle. If we use more pulleys it becomes more complex, but less effort is needed to move the load Here are some difierent types of block and tackle in ls the number of
moveable pulleys.
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