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Definition and Classification of Gears
Definition: A gear is a toothed mechanical part that can mesh with each other, transmitting power or speed through the engagement of gears.
Classification:
Plane gear: The plane of the tooth surface is parallel to the gear axis, with advantages such as smooth operation and high transmission efficiency.
Bevel gear: The plane of the tooth surface is not parallel to the gear axis, with advantages such as large torque transmission and the ability to transmit high power, widely used in heavy machinery.
Worm gear: Composed of a worm and a worm wheel, it has advantages such as a large transmission ratio and high precision, commonly used in gearboxes and reducers.
Spur gear: The tooth profile of the tooth surface is linear, with a simple manufacturing process, but produces more noise during engagement, suitable for situations where noise requirements are not high.
Involute gear: The tooth profile of the tooth surface is of involute shape, with a more complex manufacturing process, but produces less noise during engagement and has high transmission efficiency, widely used in high-precision transmission fields.
Arc gear: The tooth profile of the tooth surface is arc-shaped, with a similarly complex manufacturing process, but also has the advantages of low noise and high transmission efficiency, commonly used in automotive gearboxes and high-speed railway transmission systems.
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