planet gear

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Noun1.Planet gear - an outer gear that revolves about a central sun gear of an epicyclic trainplanet gear - an outer gear that revolves about a central sun gear of an epicyclic train
epicyclic gear train, epicyclic train - a system of epicyclic gears in which at least one wheel axis itself revolves about another fixed axis
cogwheel, gear, gear wheel, geared wheel - a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion
References in periodicals archive ?
Tenders are invited for Planet Gear Complete For Tap Changer N32 To M/S.
The designs: Design A | is inspired by the Industrial Revolution invention of the sun and planet gear system invented by William Murdoch for Boulton & Watt.
However, each planet gear is actually a compound design which meshes with two sun pinion shafts: one input shaft and one output shaft.
The root of the failure was a magnetic particle found on the chip detector of the part of the main rotor gearbox known as the second stage planet gear.
Figure 3 shows one of the examined Response Surfaces for the safety factor, in respect to the planet gear diameter and the output torque.
Pratt & Whitney Canada PT6: Turbine Blades and Stators, Compressor Rotor Blades, Stub Shafts, Planet Gear Sets, Ring Gears, Sun Gears, Accessory Gearbox Bearings and Bushing Kits; and
Thus, they differ from an ordinary parallel shaft gear trains by having a moving axis or axes: sun pinion gear, planet gear, planet carrier, internal toothed ring gear--annulus, Fig.
In response Watt and William Murdock invented the sun and planet gear system, whereby one or more outer gears, or planet gears, rotate around a central or sun gear.
The entire mechanism is considered to be locked together and the whole device is rotated one turn in a clockwise position around that axis about which the planet gear pin is carried.
Due to normal manufacturing tolerances however, a sun gear which is securely fixed on a shaft will intermittently have more load on one planet gear than on another gear.
And that's not all -- the kids with the top 100 ideas not only receive free toys, but also get personalized Wild Planet gear ranging from business cards to T-shirts.
The planet gear movement is transmitted to the output shaft.