Basic design of planetary gear units
The basic design of a planetary gear unit consists of a sun gear, a ring gear and several planetary gears. The planetary gears are supported by the ring gear and rotate around the sun gear. This operating principle gave the name to this type of gear unit. The gear unit's drive and output functions can be performed by the sun gear, the housing or the planetary carrier, depending on the design.
In the most common design, the epicyclic gear unit, the drive function is performed by the sun gear, the output function by the planetary carrier, and the housing is stationary. This design has a positive influence on the internal forces in the gear unit. The load distribution over several planetary gears enables high torques to be transmitted in a compact design. The use of helical gears reduces the running noises.
THESE ARE THE ADVANTAGES OF PLANETARY GEAR UNITS TO THE SPN STANDARD
- High torque can be transmitted
- Drive and output run synchronously
- Coaxial design
- Minimal radial backlash
- High efficiency
- High degree of stiffness
Nimble powerhouseThe planetary gear units of the PU4 series stand for power density. The use of modern materials in conjunction with innovative ideas allows a gear unit design that reconciles its inherent contradictions. A powerhouse that impresses through its lightness. Excellent performance data but nevertheless with the best inertia values. Technologically advanced. ... Learn More
For that extra stiffnessThe planetary gear units of the RC4 series are designed with a flanged shaft. The solid flanged shaft exhibits high torsional stiffness and is thus particularly suitable for positioning tasks. Fittingly, the radial backlash is less than one minute of arc. RC4, the gear unit that cuts to the chase. ... Learn More
The powerhouse with an angled stageLike the basis gear units of the PU4 series, power density also takes centre stage here. The addition of an angled stage allows these gear units to be used in confined spaces. A wide range of gear ratios can be achieved due to the combination of low-loss cyclo-palloid gears and low-noise helical gears. Thanks to their low moment of inertia, these gear units are ideal for highly dynamic applications. ... Learn More