Planetary Strain Wave Gearbox is a high-precision transmission device that combines harmonic drive flexible meshing with planetary gear system circumferential layout. The core achieves conjugate meshing with the rigid wheel through the elastic deformation of the flexible wheel, combined with the orbital motion of the planetary carrier.
Here In this page, we introduce our PET serial Planetary Gear Reducers, you will see ranges,finished gearboxes,videos of test as follows:
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Helical Gear Series:PET |
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The power transmission of Planetary Strain Wave Gearbox follows the logic of "flexible deformation meshing transmission revolution output":
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Flexible deformation |
The input shaft drives the wave generator to rotate, and the wave generator generates periodic elastic deformation of the flexible wheel through flexible bearings (stretching at the long axis and compression at the short axis); |
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Mesh transmission |
After the flexible wheel deforms, the outer teeth at both ends of the long axis fully mesh with the inner teeth of the rigid wheel, and the meshing area moves along the circumference with the rotation of the wave generator, pushing the flexible wheel to rotate at a low speed around its own axis (the rotation direction is opposite to that of the wave generator); |
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Revolution output |
The planetary carrier is fixedly connected to the flexible wheel, which drives the output shaft to revolution along with the rotation of the flexible wheel, while converting the rotational motion into stable output power. The total transmission ratio is equal to the number of rigid teeth divided by the number of flexible teeth, achieving "deceleration and torque increase". |
Core application areas of Planetary Strain Wave Gearbox:
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Medical equipment |
The minimally invasive surgical robot joint adopts a cam type planetary harmonic transmission (transmission ratio 100:1, rated torque 20N · m), with a volume only one-third of traditional transmission, ensuring an operating accuracy of ± 0.001mm for surgical instruments; |
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Aerospace |
The satellite micro attitude adjustment mechanism uses eccentric wheel transmission (transmission ratio 200:1, weight ≤ 500g) to adapt to the microgravity environment in space and achieve low-speed adjustment of 0.01 °/h; |
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Precision manufacturing |
The semiconductor wafer handling robotic arm adopts customized transmission (return clearance of 0.1 arcmin, transmission efficiency of 88%) to avoid positional deviation during wafer handling and improve yield; |
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Micro robots |
Millimeter level inspection robots adopt ultra small cam type transmission (diameter ≤ 20mm, rated torque 5N · m) to meet the power transmission requirements in narrow spaces. |
Planetary Strain Wave Gearbox is a high-performance reduction device that combines the principles of planetary transmission and strain wave transmission. Through the perfect combination of elastic mechanics and precision machinery, it achieves ultra-high transmission accuracy and excellent performance. This innovative transmission scheme has shown great potential for application in high-precision fields such as robotics and aerospace.
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