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What is planetary Gear Motors?

planetary-gearboxes

Planetary Geared Motors efficiently handles the speed and optimises the torque. They can be used in wide industrial applications ranging from steel plants to material handling equipments.

Components of Planetary Geared Motors

Motor speed reducers can be categorised in the following ways depending on how they are internally configured:

Planetary Speed Reducers

Stages of planetary gear motors are grouped, and each one has the following layout:

Sun Gear (Central Gear)

The sun gear in a planetary gearbox rotates the neighbouring planetary gears, which are mounted on a carrier to prevent slippage while in use. The planetary gears rotate the ring gear while the sun gear is powered. The sun gear is the main gear. It rotates on a bigger axis and is greater in size.

Multiple Planet Gears

The epicyclic gear typically consists of two gears, one of which meshes with the sun gear and the other with the planetary ring gear. These are used to lower speed. They are utilised to boost torque and slow down motors. Planetary gears' primary and essential job is to adjust the rotational speed or torque between the input and output shafts while transmitting torque.

Planet Carrier

The planet gear is held by the planet carrier, which rotates in the opposite direction of the planet gear. Typically, it offers support to allow two gears to roll without slippage by connecting their centres. A planet carrier that meshes with the sun can carry up to three gears.

Ring Gear (Outer Gear)
Numerous planet gears that are utilised to drive the outer ring, shaft, or spindle share the load from the sun gear. The ring gear provides a reverse direction by rotating in the same direction as the sun gear.

Advantages Of Planetary Gear Motors

Increased Repeatability

Its faster radial and axial loads are more dependable and robust, reducing gear misalignment. Additionally, flawless repeatability is provided by consistent transmission and reduced vibrations under various loads.

Perfect Accuracy

The movement's accuracy and dependability are improved by the rotation's maximum angular stability.

Efficient Durability

Because there is greater surface contact, the noise intensity is lower. Jumping is almost negligible, and rolling is much smoother. Owing to its torsional rigidity and improved rolling, it is more durable. Your bearings assist in minimising the losses that would result from the shaft rubbing against the box directly, improving this characteristic. As a result, the gear operates more smoothly and with more efficiency.

High Degrees of Effectiveness

Planetary reducers are more effective and minimise losses during operation due to their internal design and architecture. In actuality, these driving systems are the most efficient ones available today.

Improved Torque Transmission

The mechanism can transmit and endure more torque when there are more teeth in connection. Things also performs it in a more consistent way.

Maximum Adaptability

Its gearbox, which is cylindrical and can be mounted practically anywhere, houses the mechanism.


Disadvantages of Planetary Gear Motors
  • A planetary gear system will generally cost more than a traditional gearbox.
  • Planetary gear design and production are challenging and highly complex.
  • It would be difficult to figure out a planetary gear system's efficiency
  • It is challenging because the gear system demands exact gearing.
  • Some planetary gearing configurations operate noisier than others.
  • The driving component and the driven component must coincide to avoid any additional gearing.

Applications of Planetary Gear Motors
  • It is utilised in packing equipment for industrially reproducible goods.
  • They are utilised in cutter head drives, coil tubing injectors, and pumps.
  • It can be used in drives like wheel drives, track drives, conveyor drives, slew drives, hoist drives, and winch drives, among others.
  • These gears are frequently employed in robotics to increase torque.
  • It is utilised in printing presses to lower the rollers' speed.
Regulations For Planetary Gearboxes

When a manufacturer lists the operating time of your gears or the maximum torque they can withstand, keep in mind that each manufacturer establishes its own standards. Nevertheless, these parameters are governed by a few rules.

  • ISO 6636 for gears.
  • DIN ISO 281: Contains all the guidelines necessary to calculate bearings correctly.
  • ISO 9409: Part II discusses how the output shafts of these geared motors are designed in accordance with various requirements.