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Epicyclic gearing or planetary gearing is a gear system consisting of one or more outer, or planet, gears or pinions, revolving about a central sun gear or sun wheel. [ 4 ] [ 5 ] Typically, the planet gears are mounted on a movable arm or carrier , which itself may rotate relative to the sun gear.
The Moon train starts with gear b1 and proceeds through c1, c2, d1, d2, e2, e5, k1, k2, e6, e1, and b3 to the Moon pointer on the front face. The gears k1 and k2 form an epicyclic gear system; they are an identical pair of gears that do not mesh, but rather, they operate face-to-face, with a short pin on k1 inserted into a slot in k2. The two ...
Michael T. Wright, FSA (Born: 16 June, 1948) is a former curator of mechanical engineering at the Science Museum and later at Imperial College in London, England. [1] He is known for his analysis of the original fragments of the Antikythera mechanism and for the reconstruction of this Ancient Greek brass mechanism.
Diagram of an epicyclic gearing system. An epicyclic differential uses epicyclic gearing to send certain proportions of torque to the front axle and the rear axle in an all-wheel drive vehicle. [citation needed] An advantage of the epicyclic design is its relatively compact width (when viewed along the axis of its input shaft). [citation needed]
Epicyclic theory, in part, sought to explain this behavior. The inferior planets were always observed to be near the Sun, appearing only shortly before sunrise or shortly after sunset. Their apparent retrograde motion occurs during the transition between evening star into morning star, as they pass between the Earth and the Sun.
11.2 Epicyclic gear train. 11.2.1 Sun and planet. 12 Non-circular gears. 13 Non-rigid gears. ... Racks also feature in the theory of gear geometry, where, for ...
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Epicyclic gearing can be used in a torque multiplier. The sun gear (yellow) is driven by an input torque. The planet gear carrier (green) provides the output torque, while the ring gear (red) is fixed. Note the red marks both before and after the input drive (yellow) is rotated 170° clockwise.