| Customization: | Available |
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| Application: | Motor, Electric Cars, Machinery, Agricultural Machinery |
| Hardness: | Hardened Tooth Surface |
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Various Planetary Gearbox Speed Reducer Epicyclic Motor Hydraulic Unit Servo Gearbox Gear Box Reduction Planetary Gearboxes for sale
A planetary gearbox (also known as an epicyclic gearbox) is a gear system that consists of a central "sun" gear, several "planet" gears that revolve around the sun gear, and an outer "ring" gear with internal teeth. The planet gears are mounted on a "carrier" which typically serves as the output shaft. This unique arrangement allows for multiple points of contact and concentric shafting, providing distinct advantages over traditional parallel-axis gearboxes.
High Torque Density: This is one of the most significant advantages. The load in a planetary gearbox is distributed among multiple planet gears. This load sharing allows for a much higher torque capacity for a given size and weight compared to other gearbox types (like spur or helical gearboxes). Essentially, you get more power in a smaller package.
Compact and Space-Saving Design: Due to the coaxial arrangement of the input and output shafts and the internal gear meshing, planetary gearboxes are exceptionally compact. They can achieve high reduction ratios within a very small footprint, making them ideal for applications with limited space.
High Reduction Ratios in a Single Stage: Planetary gearboxes can achieve very high speed reduction ratios in a single stage (e.g., from 3:1 up to over 200:1). For even higher ratios, multiple planetary stages can be stacked, maintaining a compact design. This eliminates the need for multiple, larger gear sets.
Exceptional Shock Load Capability: The load is distributed among multiple planet gears, which provides inherent resilience to shock loads and impacts. When a sudden load is applied, the force is absorbed by several gear teeth simultaneously, protecting individual components from catastrophic failure.
High Efficiency: Despite their complexity, planetary gearboxes are highly efficient (often 90-97% per stage). The constant meshing of gears and the rolling contact between teeth minimize friction losses, ensuring efficient power transmission.
Low Backlash (High Precision): Planetary gearboxes can be manufactured with extremely low backlash, which is crucial for applications requiring high precision, accuracy, and repeatability in motion control. This is achieved through precise machining and often by pre-loading the gears.
Smooth and Quiet Operation: The even load distribution and the balanced nature of the gear set lead to very smooth and quiet operation, with minimal vibration. This is beneficial in noise-sensitive environments and for applications demanding precise, consistent motion.
Coaxial Input and Output: The input and output shafts are typically concentric (aligned along the same axis). This simplifies machine design and integration, particularly when fitting into tight spaces or connecting directly to motors or other shafts.
Durability and Long Lifespan: The load sharing across multiple gears means that individual gear teeth experience less stress. This, combined with robust construction and effective lubrication, contributes to a very long service life and high reliability.
Due to their unique combination of high torque density, compactness, precision, and shock resistance, planetary gearboxes are used in a wide range of demanding and sophisticated applications:
Robotics and Automation:
Automotive and Transportation:
Heavy Industry and Material Handling:
Renewable Energy:
Medical Equipment:
Packaging Machinery:
Aerospace and Defense:
Planetary Gearboxes is an old mechanics fundamental that is still being used for new leading innovative technology like 3D printing, and new methods of transport. The planetary gearbox is one in which the output and input shafts are aligned. Its basic function is to transfer the maximum amount of torque with the least amount of space. The gear system consists of a reduction state, an acceleration mode, and coupling. No one knows who invented the planetary gearbox, but it has been in use since the 15th century. The planetary gear gets its name from the way it looks while it functions. There is a sun gear in the middle attached to ring gears. As the sun gear rotates, it also moves the ring gears. The sun gears are called input shaft, whereas the carrier and ring gears are called output.
The planetary gearbox works in the ratios from 1.5:1 to 12000:1. In a 3:1 system, there are three ring gears and one sun gear and is called a one-stage planetary gearbox. In ratios of above 5:1, a two-stage planetary gearbox is used. In a 3:1 system, the sun gear is very big, compared to the ring gear, and in the 10:1 system, the sun gear is much smaller than the ring gears. The ratios are in absolute integers. The planetary gearbox system is very precisely placed together, but it still creates friction due to the moving parts inside - sun gear and ring gear. These need lubrication from time to time from oil, gel, or grease. This requirement is present in most moving mechanical machines.
To know what a planetary gearbox does? And it's advantages? Check our blog here - https://pto-shaft.en.made-in-china.com
There are many showcased benefits of using a gearbox like- three-fold torque compared to the normal gearbox, absolute ratios, low inertia, high efficiency, closed system, etc. The planetary gearbox has its applications in many places. It can be used to increase torque in a robot, to reduce speed in printing press rollers, for positioning, and in packaging machines to name a few.
Buying a gearbox depends on the planned use of the gearbox. There are a certain number of things to keep in mind like - torque, backlash, ratio, corrosion, resistance, noise level, delivery time, price, and availability. There might be other requirements that are different for each buyer.
A planetary gearbox is a medieval tool reincarnated in modern form. That itself says a lot about the usefulness and application of the device. It's an efficient device for the work it performs and has stood the test of time, without getting obsolete.
Manufacturer of Planetary Gearbox, Planetary gear reducer, Planetary geared motor, Epicyclic gearing, Planetary gearing, Gearboxes, can interchange and replacement with brevini gearbox, david brown gearbox and so on.
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