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cogwheel

Definitions of cogwheel
  1. noun
    a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion
    synonyms: gear, gear wheel, geared wheel
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    types:
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    bevel gear, pinion and crown wheel, pinion and ring gear
    gears that mesh at an angle
    escape wheel
    gear that engages a rocking lever
    pinion
    a gear with a small number of teeth designed to mesh with a larger wheel or rack
    epicyclic gear, planet gear, planet wheel, planetary gear
    an outer gear that revolves about a central sun gear of an epicyclic train
    rack and pinion
    a wheel gear (the pinion) meshes with a toothed rack; converts rotary to reciprocating motion (and vice versa)
    spur gear, spur wheel
    gear wheels that mesh in the same plane
    sun gear
    the central gear in an epicyclic train
    worm gear
    gear consisting of a shaft with screw thread (the worm) that meshes with a toothed wheel (the worm wheel); changes the direction of the axis of rotary motion
    worm wheel
    gear with the thread of a worm
    differential, differential gear
    a bevel gear that permits rotation of two shafts at different speeds; used on the rear axle of automobiles to allow wheels to rotate at different speeds on curves
    lantern pinion, lantern wheel
    a small pinion having cylindrical bars instead of teeth, used chiefly in inexpensive clocks
    type of:
    wheel
    a simple machine consisting of a circular frame with spokes (or a solid disc) that can rotate on a shaft or axle (as in vehicles or other machines)
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