How does an epicyclic gearbox work?

Torque applied radially onto the gears of a planetary gear train is transferred radially by the gear, without lateral pressure on the gear teeth. In a typical application, the drive power connects to the sun gear. The sun gear then drives the planetary gears assembled with the external gear ring to operate.

What are the advantages of epicyclic gear train?

Advantages of Epicyclic Gearbox : Compact and lightweight with high torque transmission. High radial loads on the output shaft. It is quieter in operation. Uniform distribution of load over all gears having greater tooth contact.

What do you mean by epicyclic gear train?

An epicyclic gear train is a coaxial speed reducer or increaser stage comprised of a sun gear, planet gear(s), and a ring gear (Townsend 1992; Coy et al. 1985). The input torque is split between the planet gears, thus increasing the load capacity of the gear train.

What is a planetary gearbox used for?

Generally, planetary gears are used as speed reducers. They are used to slow down motors and increase the torque. Torque is the working power of the machine.

What can you do with epicyclic gear box?

Note- More speed or torque ratios can be achieved by increasing the number planet and sun gear in epicyclic gear box. Epicyclic gear train is usually used in automatic vehicles with the hydraulic clutch.

Where is the sun gear in the epicyclic gearbox?

I t is the gear with angular cut teethes and is placed in the middle of the epicyclic gearbox; the sun gear is in constant mesh at inner point with the planetary gears and is connected with the input shaft of the epicyclic gear box. One or more sun gears can be used for achieving different output.

What are the red marks on an epicyclic gear train?

The red marks show the relative displacement of the sun gear and carrier, when the carrier is rotated 45° clockwise and the ring gear is held fixed. An epicyclic gear train (also known as planetary gear) consists of two gears mounted so that the centre of one gear revolves around the centre of the other.

How are spur gears distributed in an epicyclic gear train?

In an epicyclic or planetary gear train, several spur gears distributed evenly around the circumference run between a gear with internal teeth and a gear with external teeth on a concentric orbit. The circulation of the spur gear takes place in analogy to the orbiting of the planets in the solar system.