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An epicyclic gear train (also known as a planetary gearset) consists of two gears mounted so that the center of one gear revolves around the center of the other. A carrier connects the centers of the two gears and rotates to carry one gear, called the planet gear or planet pinion, around the other, called the sun gear or sun wheel. The planet and sun gears mesh so that their pitch circles roll without slip. A point on the pitch circle of the planet gear traces an epicycloid curve. In this simplified case, the sun gear is fixed and the planetary gear(s) roll around the sun gear.
What is meant by epicyclic gear train?
An epicyclic gear train is a coaxial speed reducer or increaser stage comprised of a sun gear, planet gear(s), and a ring gear (Townsend 1992; Coy et al. ... An epicyclic gear train is an excellent load-sharing device. The input torque is split between the planet gears, thus increasing the load capacity of the gear train.
Where are epicyclic gear trains used?
The epicyclic gear trains are used in the back gear of lathe, differential gears of the automobiles, hoists, pulley blocks, wrist watches, etc. The epicyclic gear trains are useful for transmitting high-velocity ratios with gears of moderate size in a comparatively lesser space.
How does an epicyclic gearbox work?
An Epicyclic gearbox is an automatic type gearbox in which parallel shafts and gears arrangement from manual gear box are replaced with more compact and more reliable sun and planetary type of gears arrangement and also the manual clutch from manual power train is replaced with hydro coupled clutch or torque convertor
What is an example of a compound gear train?
Another example of a compound gear system is seen below. Gears C and B are fixed together and rotate in the same direction and at the same speed. ... The headstock of a centre lathe contains a complex gear train and many of the individual gears are compound gears
What are the differences between compound gear train and epicyclic gear train?
In compound gear there is extra than one gear on shaft which is firmly fix and mash through the gear on another shaft forming gear train. In elliptical gear train axis of shaft on which the gear are mount can move relative to the fixed axis. ... In a compound gear train, every gear has its own shaft for rotation
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