Analysis of the Importance of Right Angle Planetary Reducer to Domestic Robot

With the rapid development of the current level of mechanization, robots are widely used in industry and manufacturing. At the same time, the technical foundation of China's robot industry is weaker than that of foreign advanced countries, and the weak core component technology is more serious. As the three main core components of industrial robot technology, reducer, AC/DC servo motor and controller directly determine the performance of industrial robots. The right angle planetary reducer technology is far from foreign technology.

The right-angle planetary reducer can ensure that the industrial robot can reliably complete the process task in the production, and the process quality can be guaranteed when the same action is repeated. Therefore, positioning accuracy and repeated positioning accuracy is a key factor in the research of industrial robot technology. In addition, the existence of the right-angle planetary reducer ensures that the motor runs at a suitable speed and accurately reduces the speed to the speed required by each part of the industrial robot, which improves the rigidity of the mechanical body and outputs greater torque.

At present, as far as the world's robot reducer industry is concerned, Japan's technical level ranks No. 1 and has dominated for many years. The world's "big four families of industrial robots" have been using speed reducers from two Japanese companies. On the other hand, Japan's reducer technology has nothing to say, but its price is also very high. The high price increases the manufacturing cost of robots and severely suppresses the profit margin of domestic robots. At present, domestic enterprises are actively exploring the research and development of reducer technology to prepare for the development of the robot industry. At the same time, these companies also want to take advantage of the rapid expansion of China's industrial robot market to achieve the leap-forward development of China's reducer industry and reach the world's advanced level.

Although the domestic demand for robot reducers has great potential, the domestic market is still occupied by foreign brands, especially Japanese manufacturers. 75% of the global right angle planetary reducer market is monopolized by Japan, and only a few domestic products are put on the market. According to statistics, so far, there are more than 420 domestic robot companies, but only 13 are studying reducers, of which only 5 have made initial progress in RV reducers, and the current research and development is still difficult.

The robot consists of three systems, namely, the control system, the servo system and the transmission system. The RV reducer in the transmission system is the joint of the robot, just like the gearbox of a car, which controls the output and operation accuracy of the robot's manpower, accounting for 33% of the cost of a robot. The robot joint reducer is required to have the characteristics of short transmission chain, small size, high power, light weight and easy control. Generally, a universal robot needs 4-8 sets of reducers.

The robot industry chain can be roughly divided into upstream key components, midstream machine system integration and downstream applications. From the perspective of the industrial chain, the gap between the upstream key components and foreign countries is large. Among all the core components, the reducer is very critical. Therefore, for the development of China's robot industry, the localization of right-angle planetary reducer is imminent. Domestic enterprises should practice hard and concentrate on technological research and development and innovation, which is a major issue in the future development strategy.