1、 A planetary reducer is an industrial product, and a planetary gearbox is a transmission mechanism. Its structure consists of an inner ring gear tightly connected to the gearbox housing, with a sun gear driven by external power at the center of the ring teeth. Between the two, there is a set of planetary gear sets consisting of three gears evenly divided and combined on a tray. The set of planetary gears relies on the output shaft, inner ring gear, and sun gear support to float during the process; When the input side power drives the sun gear, it can drive the planetary gear to rotate and follow the trajectory of the inner ring gear to revolve around the center. The rotation of the planet drives the output shaft connected to the tray to output power. A mechanism that uses a gear speed converter to reduce the rotational speed of a motor (electric motor) to the desired rotational speed and obtain a larger torque. In the gearbox mechanism used for transmitting power and motion, planetary gearboxes belong to precision gearboxes, such as CSG brand servo gearboxes. The reduction ratio can be accurate to 0.1 revolutions per minute to 0.5 revolutions per minute.

2、 RV transmission is a newly emerging type of transmission, which is developed on the basis of traditional needle pendulum planetary transmission. It not only overcomes the shortcomings of general needle pendulum transmission, but also has a series of advantages such as small size, light weight, large transmission ratio range, long service life, stable accuracy, high efficiency, and smooth transmission. It is increasingly receiving widespread attention both domestically and internationally. RV reducer is composed of cycloidal pinwheel and planetary support, which is widely used in industrial robots, machine tools, medical testing equipment, satellite receiving systems and other fields due to its small size, strong impact resistance, high torque, high positioning accuracy, low vibration, and large reduction ratio. It has much higher fatigue strength, stiffness, and lifespan than the commonly used harmonic drive in robots, and its hysteresis accuracy is stable. Unlike harmonic drive, the motion accuracy will significantly decrease over time. Therefore, many countries in the world use RV reducers for high-precision robot transmissions. Therefore, this type of RV reducer has a trend of gradually replacing harmonic reducers in advanced robot transmissions
3、 Harmonic reducer is mainly composed of three basic components: wave generator, flexible gear, and rigid gear. Harmonic drive reducer is a gear transmission that uses wave generator to generate controllable elastic deformation of flexible gear and meshes with rigid gear to transmit motion and power. Planetary reducer, RV reducer and harmonic reducer have different working principles, transmission modes and application industries.