Epicyclic drive in assistive devices

Epicyclic Drive in Assistive Devices


Epicyclic drives, also known as planetary gears, have become an essential component in a wide range of assistive devices. From wheelchairs to prosthetic limbs, epicyclic drives are used to provide a powerful and lightweight solution. In this article, we will delve into the workings of epicyclic drives and their applications in assistive devices.

What is an Epicyclic Drive?

Epicyclic drives are a type of gear system that consists of one or more planet gears that rotate around a central sun gear. The planet gears are fixed to a carrier, which in turn rotates around the sun gear. The outer ring gear, or annulus, meshes with the planet gears and rotates around the carrier. This results in a compact and efficient gear system that can provide high reductions in a small space.

Types of Epicyclic Gearing

Epicyclic gearing can be classified into various types based on the arrangement of gears, including simplex, compound, and complex. Simplex epicyclic gearing consists of one sun gear, one ring gear, and one or more planet gears. Compound epicyclic gearing consists of two or more planet gear sets that share the same carrier. Complex epicyclic gearing consists of two or more planet gear sets that have different carriers.

Applications in Assistive Devices


Epicyclic drives are widely used in assistive devices due to their compact size, high efficiency, and low weight. Wheelchairs, for example, use epicyclic drives to provide power assistance to the user. By incorporating a motor into the wheel hub, epicyclic gears can be used to increase the torque while reducing the size and weight of the system.

Prosthetic limbs are another area where epicyclic drives have found use. By incorporating a motor into the joint, epicyclic gears can be used to increase the torque while maintaining a lightweight and compact design. This can help amputees to perform a wider range of movements with less fatigue.

Our Company and Products

Our company is a leading player in the Chinese gear market, offering a range of high-quality products at competitive prices. Our products include epicyclic drives, planetary gear systems, planetary boxes, precision planetary gear motors, planetary gearheads, sun planet gears, and planetary gearbox motors.

We have over 300 sets of automatic CNC production equipment and automatic assembly equipment, enabling us to deliver products with consistent quality and precision. Our products are widely used in industries such as aerospace, robotics, medical devices, and industrial automation.


We are committed to providing our customers with the best products and services possible. We offer customization services for customers who require bespoke solutions to their gear needs. Our team of experts is always available to provide technical support and advice to our customers.

Thank you for considering our products. We look forward to working with you in the future.

Author: Czh