What is Planetary Gearbox?

Multi-stage planetary gearboxes are available by connecting the individual stage in sequence. With the gear unit combination the individual stages are sized to their torque requirement.

Sun Gear (input shaft)

Planet Gears

Planet Gears'' Carrier (output shaft)

Outer (ring or annulus) gear

-- The Function of Planetary Gearbox --

*** A planetary gearbox is a gear system utilized to increase the output torque and reduce load ineria while slowdown the speed. ***

-- The Advantages of PHT Vertex Planetary Gearbox --

-- Compact Size --

The planetary gearset share a common axis, which results in a structure of compact size than traditional device.

-- High Efficiency --

Planetary gears are in fill and constant-mesh, eliminating the possibility of gear tooth damaged from gear clash or partial engagement. The full and constant mesh feature also permits automatic and quick gear ratio changes without power flow interruption. A typical efficiency loss in a planetary gearbox arrangement is oly 3% per stage. This type of efficiency ensures that a high proportion of the energy being input is transmitted through the gearbox, rather than being wasted on a mechanical losses inside the gearbox. Efficiency better than harmonics, can be over 90% in some cases.

-- High Radial Loads on output shaft / Load Distribution amoung planetary gears --

Planetary gears are strong and sturdy and can handle larger torque loads, for ther compact size, in comparison to other gear combinations in manual transmissions. This is because that the torque load as it passes through the planetary set is distributed over the several planet pinion gears, which in effect allow more tooth contact area to handle the power transmission.

-- Higher Torque Density --

Higher torque density, as well as greater load ability is obtained with more planets in the system.

-- Greater Stability --

Due to the even distribution of mass and increased rotational stiffness, the arrangement of planetary gearbox also creates greater stability.

-- Cost Effective Precision --

Cheaper cost then other gearing options.