Planetary gear box is a widely used reduction equipment. The precision of planetary gear box is very high. On the premise of ensuring precision transmission, planetary gear box is mainly used to reduce speed, increase torque and reduce load / motor moment of inertia ratio. Planetary gearbox is also called servo reducer or servo planetary gearbox.
The principle of planetary reducer is a power transmission mechanism, which uses the speed converter of gear to decelerate the rotation number of motor to the required rotation number and obtain a large torque. The gears with few teeth on the transmission shaft of the planetary reducer mesh with the large gears on the output shaft to achieve the purpose of deceleration. Ordinary reducer will also have several pairs of gears with the same principle to achieve the ideal deceleration effect. The ratio of the number of teeth of large and small gears is the transmission ratio.
The planetary gear box adopts involute planetary gear transmission, makes rational use of internal and external meshing and power diversion, and the box body adopts nodular cast iron, which greatly improves the rigidity and seismic resistance of the box body; The gears are carburized and quenched to obtain a high hard and wear-resistant surface. All the gears are ground after heat treatment, which reduces the noise and improves the efficiency and service life of the whole machine; There are 2 and 3 stages of planetary transmission stages of planetary gearbox, which is the most commonly used stage.
The main transmission structure of planetary gear box is: planetary gear, sun gear, internal gear ring, drive motor and transmission shaft.
From the appearance, the planetary gearbox can be divided into three sections: input section, deceleration section and output section.
Input section: the input section refers to the end connected with the motor. Including input shaft hole and input flange
Reduction section: the reduction section refers to the core section of the reducer. From the outside, it looks like a box. In fact, it contains many core components, such as planetary gear, sun gear and inner ring gear.
Output section: output section refers to the end connected with the equipment, including output shaft and output flange.
Advantages of planetary gearbox transmission:
It has the characteristics of small volume, light weight, high bearing capacity, long service life, stable operation, low noise, large output torque, large speed ratio, high efficiency and safe performance. It has the characteristics of power split and multi tooth meshing. The transmission efficiency of planetary gearbox is generally more than 90%, which can reach more than 95%. It is widely used.
Purpose of planetary gearbox:
Planetary gear boxes are widely used in the fields of spring machinery, manipulator, textile machinery, machine tool manufacturing, precision machining machine tools, aerospace industry, smart home, automobile manufacturing, shipbuilding industry, semiconductor equipment, printing machinery, food packaging, automation industry, industrial robot, medical inspection, precision testing instruments and automatic high-precision electromechanical products.