The Fundamental Difference between RV Gearbox and Harmonic Gearbox

(2021年09月28日)

https://www.laifualgroup.com/products/

According to the mechanical structure, industrial robots can be divided into SCARA robots, Cartesian coordinate robots, articulated robots, parallel robots and others. The global industrial robot market is dominated by articulated robots. The robot consists of a controller, a servo motor and a gearbox. The cost of the gearbox, servo and controller account for 30% ~ 50%, 20% ~ 30%, and 10% ~ 20% of the robot cost respectively. The robot gearboxes mainly include RV gearboxes and harmonic gearboxes. What is the difference between them? How do we distinguish them during use?

1. RV Gearbox for Robots
The RV gearbox is suitable for heavy-duty robots. It is generally applied to the three joints of the leg, waist and elbow of a heavy-duty robot. Compared with harmonic gearbox, the key of RV gearbox lies in processing technology and assembly technology. RV gearbox is with higher fatigue strength, stiffness and service life. It is unlike harmonic gearbox whose motion accuracy will decrease significantly with the increase of service time. Its disadvantages are heavy weight and large size.

2. Harmonic Drives in Robotics
Robot harmonic drive is used for several shafts at the ends of small robots or large robots. Compared with RV gearbox, harmonic gearbox is characterized by small size, light weight, large bearing capacity, high motion precision and large single-stage transmission ratio.

At present, the harmonic gearbox industry in China is developing rapidly. Zhejiang Laifual Drive Co., Ltd. is a professional manufacturer and supplier of gearbox products. We can provide different types of gear boxes with reliable quality.

It can be known from the above that RV gearbox is mainly used in several front joints of heavy-duty robots. Harmonic gearbox is mainly used for the end shafts of light and small industrial robots.

Zhejiang Laifual Drive Co., Ltd. is a national gearbox producers, we provide harmonic drive gear, harmonic gearbox and etc. Want to know more? Please contact us.