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A level is a rigid bar with a point of support or fulcrum.

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A fixed pulley has a fixed axle. That is, the axle is "fixed" or anchored in a place (maybe the roof) A pulley is balanced when the effort (F) is equal to the load (R). Pulleys are used to raise and lower loads because we can add our own weight to the effort.

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A Hoist is a combination of fixed and movable pulley systems.

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Two or more wheels in contact, the primary wheel drives the output wheel.

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Two pulleys or wheels that are a certain distance apart with parallel axles

They rotate simultaneously in the same direction.

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GEAR MECHANISMS  AND COGWHEELS=MECANISMES D'ENGRANATGES I RODES DE DENTATGE

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GEAR MECHANISMS  AND COGWHEELS=MECANISMES D'ENGRANATGES I RODES DE DENTATGE

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Cogwheels are sets of wheels that have cogs (teeth).

All teeth have to be the same shape and size.

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Gear mechanisms with chain=Mecanismes d'engranatges amb cadena

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Gear mechanisms with chain=Mecanismes d'engranatges amb cadena

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These are two cogwheels with parallel axes that rotate simultaneously by means of a metal chain.

The two gears rotate in the same direction.

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It is a system of more than two gears connected together.

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When the pinion rotates, the rack advances in a linear motion.

This mechanism is reversible: it can also transform linear motion from the rack into rotary in the pinion. A corkscrew is a good example of rack and pinion.

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the worm and gear mechanism allows for rotating motion to be transferred between two perpendicular axels

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Crank and connecting rod=Manivela i biela

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Crank and connecting rod=Manivela i biela

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As the wheel rotates, the crank transmits the rotary motion to the connecting rod.

The slider moves with reciprocating motion.

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CAM AND ECCENTRIC WHEEL=LEVA I RODA EXCENTRICA

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CAM AND ECCENTRIC WHEEL=LEVA I RODA EXCENTRICA

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Cams and eccentric wheels are mechanismes that transform the rotary motion of an axle into altarnate rectilinear motion

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When a shaft has two or more cranks it can be called a crank shaft. A typical example of a crank shaft can be found on small mechanical vehicles made for young children.

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Carla Castaño, Lorenzo Flores, Marc Albert i Alba Ochando

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Carla Castaño, Lorenzo Flores, Marc Albert i Alba Ochando