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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.. Gear teeth are designed to ensure the pitch circles of engaging gears roll on each other without slipping, providing a smooth transmission of rotation from one gear to the next. [2]
1931 Bugatti Type 51 cockpit, with Wilson preselector gearbox. The most common type of pre-selector gearbox was the Wilson, which used an epicyclic design. [5] [6] A precursor to the Wilson gearbox was the manually-controlled epicyclic gearbox used in the 1901–1904 Wilson-Pilcher cars built in the United Kingdom.
The layshaft is the gear-carrying shaft that links the wallower (the small spur gear driven at increased speed by the waterwheel) to any upright shafts that carry the millstones. The term, layshaft, was also used by millwrights , in both wind- and watermills, to refer to a shaft that drove secondary machinery such as sack hoists, rather than ...
An intermediate ferromagnetic pole "stator" is usually held stationary between the rings, to direct the concentration of the magnetic lines between the high speed rotor and the low speed rotor. The gear ratio between the rotors is the number of magnetic pole pairs on the high speed rotor to the number of magnetic pole pairs on the low speed rotor.
The involute gear profile, sometimes credited to Leonhard Euler, [1] was a fundamental advance in machine design, since unlike with other gear systems, the tooth profile of an involute gear depends only on the number of teeth on the gear, pressure angle, and pitch. That is, a gear's profile does not depend on the gear it mates with.
Total face width is the actual dimension of a gear blank including the portion that exceeds the effective face width, or as in double helical gears where the total face width includes any distance or gap separating right hand and left hand helices. For a cylindrical gear, effective face width is the portion that contacts the mating teeth.
Commercial vehicle transmission diagram showing the gear fork, gearbox, and gears. Trained drivers of vehicles with non-synchronous transmissions sometimes use the techniques listed below. If improperly implemented, these techniques can cause damage to the vehicle or the loss of control of the vehicle.
An idler gear is a gear wheel that is inserted between two or more other gear wheels. The purpose of an idler gear can be two-fold. Firstly, the idler gear will change the direction of rotation of the output shaft. Secondly, an idler gear can assist to reduce the size of the input/output gears whilst maintaining the spacing of the shafts.