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2024

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What is gear?

Source:

Time:2024-01-12 15:44


A gear is a rotating circular machine part, with cutting teeth, or in the case of gears or large gears, with inserted teeth (called gears), which mesh with another (compatible) toothed part to transmit (convert) torque and speed. The basic principle behind gear operation is similar to that of xxx. Gears may also be informally referred to as gears. The gearing may change the speed, torque and direction of the power source. Gears of different sizes produce torque changes through their gear ratios, resulting in mechanical advantages, and therefore can be considered simple machines. The rotational speed and torque of the two meshing gears differ in proportion to their diameters. The shape of the teeth on both meshing gears is the same.

Two or more meshing gears working in sequence are called gear trains or transmissions. The gears in a transmission are similar to the wheels in a crossed pulley system. One advantage of the gear is that the teeth of the gear can prevent slippage. In transmissions having multiple gear ratios-such as bicycles, motorcycles, and automobiles-the term gear (e. g., first gear) refers to a gear ratio rather than an actual physical gear. The term describes similar devices, even if the gear ratio is continuous rather than discrete, or when the device does not actually contain gears, such as a continuously variable transmission (CVT). Sometimes a CVT is referred to as a continuously variable transmission.

In addition, the gear can mesh with a linear toothed member called a rack, producing linear motion instead of rotation (circular motion).