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Mechanism, Types of levers, N₁ and N₂ are the velocities of the primary…
Mechanism
Linear motion mechanisms
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|Pulley| A pulley is a wheel with a grooved rim around which a cord passes, which acts to change the direction of a force applied to the cord and is used to raise heavy weights.
Types of pulleys
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In the image, the pulley of the left (F=R·2) and the one on the right (F=R/2ⁿ)
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Rotary motion mechanisms
The ratio between the rotation velocity of the wheels or pulleys depends on the relative size of the wheels. (N₁ · D₁ = N₂ · D₂ → D₁/D₂= N₂/N₁)
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Mechanism normally produce movement, also called motion, an example of that is a bicycle: the gear system makes it move.
They have diverse uses: 1.Transporting sometime from A to B 2.Telling the time (a clock) 3.Entertaining children in the park
The most important thing is the driving force that initiates the movement it can be spring, an electric motor or our own muscles.
In conclusion:Mechanisms are devices that transmit and convert forces and motion from a driving force or input element to an output element.
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N₁ and N₂ are the velocities of the primary drive wheel and the output wheel, they are expressed on rpm (revolutions per time)
D₁ and D₂ are the corresponding diameters, they are expressed on units of lenght, usually milimeters
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There are two ways in which motion can be transformed: From rotary to linear or from rotary into reciprocating.
