A planetary gearbox is comprised of a carrier, planet gears, ring gear, and a sun gear. Each of the planetary gears are fixed to the carrier but they are free to rotate around their own axis. In a planetary gearbox the input and output shafts are aligned with each other. It has a high torque density meaning it is very compact. It has low backlash, high efficiency, and as low mass inertia. The planetary gearbox was functionally described by Leonardo DaVinci in 1490. Planetary gearboxes have absolute ratios between 3:1 and 10:1 per stage. The number of teeth in the planetary gearbox do not influence the gear ratio, but they still need to conform to the Diametral pitch requirement.
Helicopter Gearbox Failure – helicopter gearboxes can be designed as a planetary gearbox.
[[Planetary Gears for Hybrid Vehicles]]
[[Battle Robot Tips]] – planetary gearboxes are used in combat robot designs
BEV Transmission – can sometimes use a planetary gearbox
Ravigneaux Gear Train – double planetary gear set
Mi-24 Transmission – uses a planetary gearbox
Ka-32 Gearbox – uses 2 counter-rotating planetary gear stages
AH-64 Gearbox – uses a staged-planetary arrangement
Single Circular Arc Gear – can reduce the height of the gearbox compared to a planetary design
OH-58C Main Gearbox – uses a planetary gearbox
HX50 Main Rotor Gearbox
[[F-18 Leading-Edge Flap System]] – used planetary gears to power the flaps
Sources
- HybridElectricVehiclea
- dynamicsWhatPlanetaryGearbox2017
Backlinks
[[Toyota Synergy Drive]]