What's the difference between planetary reducer, RV reducer and harmonic reducer?

1. Planetary reducer is an industrial product. Planetary reducer is a kind of transmission mechanism. Its structure is closely combined with the gearbox shell through the internal gear ring. There is a sun gear driven by external power in the center of the gear ring, and a planetary gear set consisting of three gears in equal parts is arranged on the tray between them. The planetary gears float through the output shaft, the ring gear and the sun gear during this period. When the input power drives the sun gear, it can drive the planetary gear to rotate and revolve around the center along the track of the internal gear ring, and 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 number of revolutions of a motor to the required number of revolutions and obtain greater torque. Among the reduction mechanisms used to transmit power and motion, planetary reducer belongs to precision reducer, such as PGM planetary reducer of Shenzhen Madong Electromechanical Co., Ltd. and Hubei planetary reducer. The reduction ratio can be accurate to 0. 1 turn -0.5 turn.

Secondly, RV transmission is a new type of transmission developed on the basis of traditional pin-pendulum planetary transmission. It not only overcomes the shortcomings of general pin-pendulum transmission, but also has a series of advantages such as small volume, light weight, large transmission ratio range, long service life, stable precision, high efficiency and stable transmission. More and more attention has been paid at home and abroad. RV reducer consists of cycloidal pinwheel and planetary bracket, which is widely used in industrial robots, machine tools, medical testing equipment, satellite receiving systems and other fields because of its small size, strong impact resistance, large torque, high positioning accuracy, small vibration and large reduction ratio. Compared with the harmonic drive commonly used by robots, it has much higher fatigue strength, stiffness and life, and the return error accuracy is stable. Unlike harmonic drive, the motion accuracy will decrease significantly with the increase of service time, so RV reducer is widely used in high-precision robot drive in many countries in the world. Therefore, this RV reducer has the development trend of gradually replacing the harmonic reducer in the driving of advanced robots.

Third, the harmonic reducer is mainly composed of three basic components: wave generator, flexible gear and rigid gear. Harmonic drive reducer is a kind of gear transmission which makes flexible gear produce controllable elastic deformation through wave generator and mesh with rigid gear to transmit motion and power.

Planetary reducer, RV reducer and harmonic reducer have different working principles, different transmission modes and different application industries.