COMPOUND MACHINES

Combining knowledge about Simple Machines and basic Machine Elements.

http://www.youtube.com/watch?v=B17OvPYM040

Kinematic Pairs

Two rigid bodies moving with respect to one another.

Made possible, by...

Joints

A mechanical constraint that connects kinematic pairs and controls the “Degrees of Freedom” of a mechanism.

Varieties of Joints

Prismatic Joint Revolute Joint Cylindrical Joint

Varieties of Joints

Screw Joint(Linear Actuator) Ball and Socket Joint

Universal Joint (U-Joint)

Degrees of Freedom (DOF)

Set of possible displacements, rotations that define the position & orientation of a body/system.

weird!

Categories of Compound Machines:

- Linkages (More on this later)

- Geared Motion- Reciprocating / Oscillating- Cams and Cam-Followers- Intermittent Motion

Geared MotionORBITING

PLANETARY

Geared MotionRACK AND PINION

Geared MotionWORM GEAR

Reciprocating / OscillatingCRANK SLIDER

a.k.a. Piston

Reciprocating / OscillatingCRANK ROCKER (2)

Reciprocating / OscillatingBEAM ENGINE

Geared MotionRECIPROCAL MOTION WITH GEARS

Reciprocating / OscillatingRHOMBIC DRIVE

Irregular MotionCAMS

DA VINCI CAM-HAMMER

Intermittent MotionGENEVA STOP

Intermittent MotionRATCHET

Intermittent MotionESCAPEMENT