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What Are The Structural Classifications Of Gears?

2022-10-27

A gear is a mechanical element that continuously meshes with gears on the rim to transmit motion and power. The application of gears in transmission appeared very early. At the end of the 19th century, the principle of the gear cutting method and the special machine tools and tools that used this principle to cut teeth appeared one after another. With the development of production, the stability of gear operation was paid attention to.

Structural classification of gears

Generally, there are gear teeth, tooth slots, end faces, normal faces, addendum circles, tooth root circles, base circles, and index circles.

Gear Teeth
Teeth for short, are each raised part of the gear for meshing. These raised parts are generally arranged in a radial pattern. The teeth on the paired gears are in contact with each other, so that the gears can be continuously meshed.

Cogging
It is the space between two adjacent gear teeth on the gear; the end face is the plane on the cylindrical gear or cylindrical worm, which is perpendicular to the axis of the gear or worm.

End Face
are the planes at both ends of the gear.

Dhamma
Refers to the plane perpendicular to the gear tooth line.

Addendum
Refers to the circle where the tip of the tooth is located.

Root Circle
Refers to the circle where the groove bottom is located.

Base Circle
The occurrence line forming the involute is a pure rolling circle.

Index Circle
It is the reference circle for calculating the geometric dimensions of the gear in the end face.

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