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MECHANISMS (Rotary motion mechanisms (Gear mechanisms and cogwheels (N1 x…
MECHANISMS
Mechanisms
The most important element in all of them is the driving force that initiates the movement. The driving force can be a spring, an electric motor or our own muscles. The motion produced by a motor is transformed and converted by those mechanisms to receiving elements such as wheels, clock hands, and so on, so that they can do the lob for which they were constructed.
Mechanisms are devices that transmit and convert forces and motion from a driving force or input element to an output element. They allow us to carry out certain tasks more easily and more efficiently.
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Linear motion mechanisms
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Fixed pulley
A fixed pulley is a wheel that has a groove around lt into which a rope,cham or belt fits It rotates around an axle that is fixed to an immobile surface. A fixed pulley is balanced when the effort F is equal to the resistance of theload, R:
F=R
Movable pulley
A moveable pulley ts a set of two pulleys — one is fixed while the other can move in a linear direction. A moveable pulley is balanced when it satisfies this equation:
F= R/2
Compound pulley
This is a system of fixed and moveable pulleys, often called block and tackle.If we use more pulleys, the system becomes more complex, but lesseffort is needed to move the load. n = the number of movable pulleys.
F= R/n*2 F=R/2elevado a n
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