Drive system of industrial robot

The drive system is a device that provides power to the mechanical structure system. According to different power sources, the drive system can be divided into four types: hydraulic, pneumatic, electrical and mechanical. Early industrial robots were hydraulically driven. Due to the leakage, noise and low-speed instability of the hydraulic system, and the bulky and expensive power unit, currently only large-scale heavy-duty robots, parallel processing robots and some special applications use hydraulically driven industrial robots. Pneumatic drive has the advantages of fast speed, simple system structure, convenient maintenance and low price. However, the working pressure of the pneumatic device is low, and it is not easy to accurately locate it, and it is generally only used to drive the end effector of an industrial robot. Pneumatic hand grip, rotary cylinder and pneumatic suction cup as end effectors can be used for medium and small load workpiece gripping and assembly. Electric drive is currently the most widely used driving method. Its characteristics are convenient power supply, fast response, large driving force, convenient signal detection, transmission, and processing, and it can adopt a variety of flexible control methods. The driving motor generally uses step Into the motor or servo motor, the direct drive motor is also currently used, but the cost is higher and the control is more complicated. The reducer matched with the motor generally uses a harmonic reducer, a cycloid reducer or a planetary gear reducer. Due to the large number of linear drive requirements in parallel robots, linear motors have been widely used in the field of parallel robots.