What are the functions and types of joint reducers for industrial robots
In recent years, industrial robots have ushered in explosive development, especially because of the increase in labor costs, which makes manufacturing enterprises increasingly prefer to use robots that are more mechanized, more efficient and lower cost. When it comes to industrial robots, we have to mention one of the important parts, that is, the reducer. Due to the different operating environment and performance of industrial robots, the types of reducers used are also different.
As we all know, with the improvement of labor cost and the development of technology, industrial robots are used more and more. There are many kinds of industrial robots, such as multi joint robots, planar multi joint robots, coordinate robots and cylindrical coordinate robots. Among them, multi joint robots are widely used. Multi joint robots are mainly driven by joint motors. Considering the driving torque, deceleration mechanisms are generally required.
Function of Key Reducer of Industrial Robot
The operation of industrial robots is mainly controlled by three components, namely, servo motor, reducer and controller. The reducer is used to precisely control the movement of robot joints and transmit greater torque. At present, the common reducers are mainly divided into two types: RV reducers installed at heavy load positions such as industrial robot boom and shoulder, and harmonic reducers installed at forearm, wrist and hand light load positions.
Industrial robot joint reducer is a kind of equipment used to reduce the amount of clearance and improve the accuracy of industrial robot system. It does this by reducing the rotational clearance between gears. This can improve the accuracy when moving parts and reduce the error in the movement process. The importance of installing a reducer at the joint of an industrial robot is that it can improve the overall accuracy of the industrial robot system.
Industrial robot joint reducer can also provide greater torque transmission. When the joint load of the industrial robot is large, simply increasing the power of the servo motor is not cost-effective, and the output can be improved within an appropriate speed range through the reducer. In addition, the servo motor is easy to heat up and vibrate under low frequency operation, which is not conducive to ensuring the accurate and reliable operation of the industrial robot that works for a long time and periodically.
Types of joint reducers for industrial robots
RV reducer and harmonic reducer are two common reducers in articulated robots. For industrial robots with small load or multi axes at the end of large robots, harmonic reducer is a harmonic drive device. Harmonic reducer consists of rigid wheel, flexible wheel, bearing and wave generator. Among them, the number of teeth of rigid gear is slightly greater than that of flexible gear. The harmonic reducer for small robots has the characteristics of small size, light weight, large bearing capacity, high motion accuracy, and large single-stage transmission ratio.
RV reducer has the advantages of small size, strong impact resistance, large torque, high positioning accuracy, small vibration, large reduction ratio, etc. Therefore, it is mainly used in industrial robots, machine tools, medical and other fields. In addition, it is also applicable to detection equipment, satellite receiving systems and other fields.
RV reducer is suitable for medium and heavy load applications due to its strong impact resistance and high accuracy. The RV reducer needs to transmit large torque and bear large overload impact to ensure the expected service life. In the design, the relatively complex over positioning structure is adopted, which makes the manufacturing process and cost control difficult. There is no force component of elastic deformation inside the RV reducer, so it can bear a certain torque. The bearing of RV reducer is its weak point, which is easy to break through the bearing force limit, causing abnormal wear or fracture of the bearing. This problem is more prominent during high-speed operation, so the rated torque of RV reducer decreases significantly with the increase of input speed.