2016 China's industrial robot reducer market analysis

What does the reducer mean to the robot? The precision reducer is a precise power transmission mechanism. It uses a gear speed converter to reduce the number of revolutions of the motor to the required number of revolutions and obtain a device with a larger torque. , Thereby reducing the speed and increasing the torque.The precision reducer is the most important part of the industrial robot, and the core component of the industrial robot's motion; the joints are composed of it, and each joint must use different reducer products.

  Joints of a six-axis robot

  Different reducer products are used for each joint

  According to different structures, precision reducers for industrial robots can be divided into five categories. RV reducers and harmonic reducers are the most mainstream precision reducers for industrial robots.According to different structures, precision reducers can be divided into five categories: harmonic gear reducers, cycloid planetary reducers, RV reducers, precision planetary reducers and filter gear reducers.They are different in the accuracy, torque, rigidity, transmission efficiency and other measures of various performance indicators of the reducer.Among them, RV reducer and harmonic reducer are the most mainstream precision reducers for industrial robots.

  RV reducer and harmonic reducer are the most important reducers used in industrial robots. RV reducers have a tendency to gradually replace harmonic reducers in advanced robot transmissions.75% of the world's precision reducer market is occupied by Japan's HarmonicaDrive and Nabtesco. Among them, Nabtesco produces RV reducers, which account for about 60% of the market, and Hamonica Drive produces harmonic reducers, which account for about 15% of the market. RV reducer is mainly used for robot joints above 20 kg, and harmonics are used for robot joints below 20 kg. Unlike the harmonic reducer, as the use time increases, the motion accuracy of the RV reducer will be significantly reduced, and there is a tendency to gradually replace the harmonic reducer in the advanced robot transmission.However, because the components of the RV reducer are more complex and the load-bearing strength is higher, not only the manufacturing difficulty is greater than that of the harmonic reducer, but the investment scale of its production line is much larger than that of the harmonic reducer.

  my country's precision reducer started late, and counterattack challenges are numerous.Compared with the accumulation of decades of Japanese giants, the research on precision reducers for industrial robots in China started late and the technology is immature, forming a situation where precision reducers cannot be self-sufficient and rely heavily on imports. The RV reducer needs to transmit a large torque, bear a large overload impact, and ensure the expected working life. Therefore, the positioning structure is used in the design, and the processing is very difficult.The seemingly simple RV reducer is actually a challenge to my country's industrial infrastructure system.Expensive imported general-purpose machine tools may not be able to produce precision parts. It is not possible to produce precision parts by introducing a few imported equipment. It is impossible to produce precision reducers without thoroughly understanding the relevant materials, heat treatment, and craftsmanship.Some domestic companies have made major breakthroughs in technology, but they have not yet formed a large sales scale.

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