Introduction to Mechanisms

Devices that receive an input movement (linear, circular, alternative) and transform it into another output movement with the desired characteristics are called mechanisms.

For example, the lever of a shear receives an input movement with little force and a lot of travel and transforms it into an output movement in the cutting pliers, with a lot of force and little travel.

Classification of mechanisms

Mechanisms can be classified according to the type of movement they perform in and out.

Linear motion mechanisms

• Pulleys and hoists
• Inclined plane
• Levers

Rotary movement mechanisms

• Spur gears
• Bevel gears
• Pulleys and belts
• Sprocket and chains
• Friction wheels
• Worm screw and crown
• Transmission shaft and cardan joint

Linear and rotary motion mechanisms

• Rack and pinion
• Turnstile
• Gear crank
• Crankshaft
• Cam and eccentric
• Screw and nut

Auxiliary mechanisms

• Bearings
• Lanes
• Swivel joint
• Energy storage
• Clutch
• Brake
• Ratchet