1.Working principle of planetary gearboxes
The working principle of planetary gearboxes is based on the special design of planetary gear mechanisms. The planetary gears rotate around the sun gear while rotating themselves. This structure allows power to be transmitted between multiple gears, thereby achieving efficient deceleration and torque amplification. Planetary gearboxes can achieve deceleration or speed-up transmission by fixing different components.

2.Main structure of planetary gearboxes
‌1.Sun gear: Usually connected to a rotating shaft, it is the central component of the planetary gear system.
‌2.Planetary gear: Supported by the fixed axis of the planetary carrier, it can rotate freely on the supporting shaft. The planetary gear can not only rotate on its own axis, but also around the central axis of the sun gear.
‌3.Planetary carrier: Supports the planetary gear and transmits torque. Its structure allows the planetary gear to rotate freely on it.
‌4.Ring gear: Usually located on the periphery of the planetary gear, meshes with the planetary gear to transmit power.

3.Design significance of planetary gearbox
1.Efficient transmission: Planetary gearbox can convert the high speed and low torque output of the motor into low speed and high torque, which is suitable for various mechanical equipment, such as machine tools, metallurgical equipment, mining machinery, lifting machinery and ship machinery, etc. This design makes planetary gearbox have a wide range of application value in industrial production.
2.Compact structure: The internal structure of the planetary gearbox is compact. The output speed is adjusted by changing the number of planetary gears and the arrangement of internal and external gears. This speed regulation method is more compact and effective than mechanical gearbox. This design feature gives the planetary gearbox a significant advantage in equipment with limited space.
3.High-precision transmission: The internal structure of the planetary gearbox is precise and the transmission accuracy is high, which can make the operation of mechanical equipment smoother, more stable and more precise. In mechanical equipment that requires precision control, planetary gearbox is an indispensable part.
4.Multi-functional application: Planetary gearbox is widely used in various mechanical transmission systems, including industrial machinery, transportation tools and robots. In automobiles, planetary gearboxes are used in automatic transmissions and four-wheel drive systems to improve the driving experience and fuel economy of automobiles; in robots, planetary gearboxes can improve the power, speed and precision of robots.
‌5.Optimized design and manufacturing: The design of the planetary gearbox optimizes torque distribution and load-bearing capacity, and can effectively transmit torque under high power loads while maintaining the compactness and high load-bearing capacity of the system. This design feature makes planetary gearboxes important in engineering vehicles and other heavy machinery.

4.Protection of planetary gearboxes
1.Regular replacement and cleaning of lubricating oil: Planetary gearboxes need to regularly replace lubricating oil and clean the lubrication system to ensure their smooth operation. The lubricating oil should be replaced every 1000 cumulative hours of operation, and the lubrication system should be thoroughly cleaned.
‌2.Check and maintain key components: Regularly check the key components of the gearbox, such as gears and bearings, to ensure that they are intact. Gears and bearings should be inspected in detail every 5000 hours, wear should be assessed, and damaged parts should be replaced in time.
‌3.Comprehensive disassembly and cleaning‌: Every time the 10,000-hour milestone is reached, a comprehensive disassembly should be carried out, including cleaning internal parts, assessing wear and replacing necessary parts. This helps to extend the service life of the gearbox‌.
‌4.Prevent water stains‌: For specific applications (such as sand dredging ships), protective devices can effectively prevent water stains from corroding the box structure for a long time, improving its durability and service life‌.
‌5.Daily inspection and maintenance‌: Check the working status of the gearbox daily, including lubrication, temperature, and sound. Clean the outside of the gearbox regularly to keep it clean, and check for oil and water leakage, and promptly detect and deal with leakage problems‌.
‌6.Maintenance of the cooling system‌: Clean the cooler to prevent scale accumulation from affecting the heat dissipation effect. Check the working status of the oil pump to ensure that it is supplying oil normally‌.