Ring gear: also known as inner cylindrical gear or gear ring, is a mechanical component with a circular ring structure. Its inner side is evenly arranged with teeth, whose main function is to use the meshing of gears to transmit power, thereby achieving rotation and transmission effects. The ring gear can be used in conjunction with other gears or directly connected to mechanical equipment, such as the flywheel and the ring gear on the outer edge, for starting the engine.

The characteristics of the ring gear include:

·Structure: The ring gear is a circular gear with a series of teeth inside and a usually smooth outer surface.

·Working principle: It transmits power to other parts of the machine by meshing with another gear (usually a gear).

·Application: Gear rings are widely used in industrial robots, engineering machinery, and other large mechanical devices that require stable motion transmission. Gear rings can also be classified into various types based on the materials used, including but not limited to steel, stainless steel, gray cast iron, bronze, cast iron, heat-treated steel, brass, tool steel, ductile iron, copper, and aluminum alloys.