Gears, Gears, and more Gears

James Erath

Spur Gear The “standard” gear, has straight cut

teeth, fit only if parallel to each other Examples: Most of the gears included

in the Mindstorms set, gasoline engines, bicycle transmissions

Worm Gear Spiraled threads mean that worm

gears can be mounted horizontally to spur gears

Generally give a high torque/low-rpm conversion

Examples: Mills, Mining Equipment, Torsen Differentials

Crown Gear Teeth project 90 degrees out from the

side of the gear Used to change direction of power Examples: Rack and pinion,

differentials

Rotary to Linear Conversions

Rack and Pinion: A gear rotates ontop of a toothed beam and therefore pushes it

Examples: Cog Railway, Rack and Pinion Steering

Rotary to Linear Conversions

Camshaft: A wheel with a potrusion pushes against a rod, moving it up and down

Examples: Gasoline engines, diesel engines

Rotary to Linear Conversions

Crankshaft: A gear with a free-moving rod attached to the side of the gear and a moveable rod rotates creating a piston like motion

Examples: Gasoline Engines, Diesel Engines, Steam Engines