The joint password of robots and planetary reducers revealed

What are the secrets of the "joints" of robots?

The reducer is like the "joint" of a robot, which can make the robot's movements smoother and more precise, and is the key to realizing various complex movements of the robot. Today, let's delve into the RV reducer, harmonic reducer, and planetary reducer that play important roles in humanoid robots, and see what are their differences and where they are applied in humanoid robots.

Planetary reducer: a highly cost-effective 'practical' option

Planetary gearbox, Planetary Reducer， It is a power transmission mechanism that utilizes the principle of planetary gear transmission. It can be said to be the "practicality" of the transmission industry, with advantages such as compact structure, high transmission efficiency, and relatively low cost. It is like an affordable and reliable partner, deeply loved by everyone. In the structure of a planetary reducer, the planetary gears rotate around the sun gear and mesh with the outer gear ring. Through this clever design, efficient power transmission and deceleration are achieved.

It has a wide range of applications in many industrial fields, such as automated production lines, logistics equipment, etc. In humanoid robots, planetary reducers also play an important role and are often used in parts that do not require particularly high torque but require high transmission efficiency and stability, such as the leg joints of the robot, to provide stable power support for the robot's walking.

Planetary gearbox: a reliable partner for traditional structures

The working principle of planetary reducers is relatively traditional, but very reliable. It is mainly composed of a sun gear, planetary gears, planet carrier, and inner ring gear, which together form a stable and efficient transmission system. When power is transmitted from the input shaft, the sun gear begins to rotate, acting as a conductor, driving the surrounding planetary gears to revolve around it.

At the same time, planetary gears also rotate on their own axes, like a group of planets revolving around the sun, which is also the origin of the name planetary gearbox. During the process of planetary gear revolution and rotation, they mesh with the inner ring gear, and through this meshing relationship, power is transmitted to the planetary carrier, which ultimately outputs the reduced power.

The transmission ratio of a planetary reducer can be achieved by adjusting the number of teeth on the sun gear, planetary gears, and inner ring gear. It has a simple structure and is easy to design and manufacture. Moreover, due to the ability of planetary gears to evenly distribute loads during transmission, planetary reducers have high transmission efficiency and reliability, just like a reliable old friend who silently provides stable power support for the operation of robots.