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MECHANISMS (types of pulleys (Fixed pulley (F = R), movable pulley (F =…
MECHANISMS
types of pulleys
Fixed pulley
F = R
movable pulley
F = R/2
Compound pulley
F = R/ 2· n
From rotary into linear
Rack and pinion system
L= P·Z·N
Winch and crank handl
F·d= R·r =) F=R·R·r/d
levers
F·d = R·r
Friction drives
N1·D1 = N2·D2 =) D1/D2 = N1/N2
Pulleys with belt
N1·D1 = N2·D2 =) D1/D2 = N1/N2
Gear mechanisms and cogwheels
N1·Z1 = N2·Z2 =) Z1/Z2 = N1/N2
Worm gear
Nweel= Nscrew · Zgrooves / Zweel
Gear mechanisms with a chain
N1·Z1 = N2·Z2 =) Z1/Z2 = N1/N2
Gear train
N4/N1 = Z1·Z3/Z2·Z4
Pulley trains with belts
N4/N1 = D1·D3/D2·D4
