Learn what a planetary gear is in one minute

Planetary gear mechanisms There are many types of planetary gear mechanisms. The simplest planetary gear mechanism is composed of a sun gear, a ring gear, a planet carrier and 4 planetary gears supported on the planet carrier, which is called a single planet. In the row, the sun gear, the ring gear and the planet carrier have a common fixed axis. The planet gears are supported on the planet gear shafts fixed on the planet carrier and mesh with the sun gear and the ring gear at the same time. When the planetary gear mechanism is running, several planetary gears that are empty on the planetary gear shaft of the planet carrier can rotate on their own axis, and at the same time can revolve around the sun gear together with the planet carrier. In the planetary row, the sun gear, the ring gear and the planet carrier with a fixed axis are called the three basic independent elements of the planetary row.

Types of planetary gear mechanisms Planetary gear mechanisms can be classified in different ways.

1. According to the number of rows of gears, planetary gear mechanisms can be divided into two types: single-row planetary gear mechanisms and double-row planetary gear mechanisms.

2. According to the difference in the number of planetary gear sets between the sun gear and the ring gear, planetary gear mechanisms It can be divided into two types: single planetary gear and double planetary gear.