CLASSIFICATIONS OF MECHANISMS 

Rotary transmission

Transmision of motion
* Linear transmission⇒ puley
* Rotary transmision⇒ gears

Linear transmission

Transformation of motion

* Rotary-linear⇒ rack and pinion

* Reciprocating rotary-linear⇒ crankshaft

Rotary-linear

Reciprocating rotary-linear

                                           

                     

Motion control

* Direction control⇒ ratchet

* Speed reduction⇒ brake

Speed reduction

Direction control

Energy accumulation
* Absorption/Dissipation⇒ spring

Connection
*Linkage⇒ clutch
*Support⇒plain bearning

Linkage (clutch)

Support (plain bearning)

CONSERVATION OF ENERGY AND WORK IN MECHANISMS
Mechanisms can´t create energy on their own. All mechanisms produce the same amount of work that is done to them, including energy that is lost to friction and heat.
If a mechanism increases force, it must decrease motion, in this way, energy and motion are conversed.

 MECHANISMS

WHAT IS A MECHANISM?

A mechanism is a device designed to transform input forces and movement into an output force and motion.

Mechanisms transmit and transform force and motion from an input source, to an output receptor.In the case of a bicycle the input source is our legs.

                               

                               

THE PARTS OF A MECHANISM

                      Input of force and motion
                                      ⇩
                               Mechanism
                                      ⇩
                      Output force and motion