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Epicyclic gearing
Videos
An epicyclic gear train is a gear reduction assembly consisting 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 g
Bookwheel, from Agostino Ramelli's Le diverse et artifiose machine, 1588
Bookwheel, from Agostino Ramelli's Le diverse et artifiose machine, 1588
Compound planets of a Sturmey-Archer AM bicycle hub (ring gear removed)
Compound planets of a Sturmey-Archer AM bicycle hub (ring gear removed)
A spur gear differential constructed by engaging the planet gears of two co-axial epicyclic gear trains. The casing is the carrier for this planetary
A spur gear differential constructed by engaging the planet gears of two co-axial epicyclic gear trains. The casing is the carrier for this planetary gear train.
Stepped planet series of the Rohloff Speedhub internally geared bicycle hub with the smaller planet series meshing with the sun wheel and the larger p
Stepped planet series of the Rohloff Speedhub internally geared bicycle hub with the smaller planet series meshing with the sun wheel and the larger planet series meshing with the ring gear
Gear train
Videos
A gear train or gear set is a machine element of a mechanical system formed by mounting two or more gears on a frame such that the teeth of the gears engage.
Epicyclic gearing
…a planetary gear train. By choosing to hold one component or another—the planetary carrier, the ring gear, or the sun gear—stationary, three different gear ratios can be realized. One important property of planetary gear systems is their ability to combine multiple rotational inputs into a single output. This…
Transmission of motion and force by gear wheels, compound train
Transmission of motion and force by gear wheels, compound train
Illustration by Georgius Agricola (1580) showing a toothed wheel that engages a slotted cylinder to form a gear train that transmits power from a huma
Illustration by Georgius Agricola (1580) showing a toothed wheel that engages a slotted cylinder to form a gear train that transmits power from a human-powered treadmill to mining pump
2 gears and an idler gear on a piece of farm equipment, with a ratio of 42:13 = 3.23:1
2 gears and an idler gear on a piece of farm equipment, with a ratio of 42:13 = 3.23:1
Bicycle with toothed belt drive to transmit torque from crank to rear sprocket
Bicycle with toothed belt drive to transmit torque from crank to rear sprocket