The main part of the planetary gearbox is composed

1. Sun gear (Sun Gear): The sun gear is the central shaft of the planetary gear box, which drives the entire gear system through the input power.

2. Planet Gear (Planet Gear): Planetary gears rotate around the sun gear, usually there are two or more, they are connected by a planet carrier.

3. Planet carrier (Planet Carrier): The planet carrier is the carrier of the planet gears, which connects the planet gears together and enables them to rotate around the sun gear.

4. Ring gear (Ring Gear): The ring gear is the external gear of the planetary gearbox, which rotates at the same time as the planetary gear, and transmits the output force and torque to the external device.

In a planetary gearbox, the sun gear serves as the input shaft and the ring gear serves as the output shaft. As the sun gear rotates, the planet gears rotate around the sun gear through the planet carrier, while the ring gear remains stationary. This design can achieve different speed and torque conversion, providing a variety of transmission ratio.

It is worth noting that the planetary gearbox may also include other auxiliary components, such as bearings, seals, lubrication systems, etc., to ensure normal operation and reduce friction losses. Different planetary gearbox designs may have some differences, but the above components are the basic components.