Planetary pinion gear deflection restraint device
AssigneeTextron Innovations Inc.
InventorsMatthew Michael Wilcox, Eric S. Olson, Trenton Allen Hamm
Life of this patent
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Abstract
One embodiment is a rotorcraft including a rotor system and a transmission system for providing rotational power to the rotor system, the transmission system comprising a housing and a planetary pinion gear disposed in the housing. The rotorcraft further includes a restraint assembly associated with the planetary pinion gear, the restraint assembly configured to restrict radial deflection of the planetary pinion gear during operation thereof subsequent to a crack-through failure of the planetary pinion gear.
Claims19
A rotorcraft comprising:
- a rotor system;
- and
- a transmission system for providing rotational power to the rotor system, the transmission system comprising:
- a housing;
- and
- a planetary pinion gear disposed in the housing;
- and
- a restraint assembly associated with the planetary pinion gear, the restraint assembly configured to restrict radial deflection of the planetary pinion gear during operation thereof subsequent to a crack-through failure of the planetary pinion gear;
- wherein the restraint assembly comprises at least one washer including a flange around a circumference thereof, wherein an inner surface of the flange engages an outer circumferential edge of the planetary pinion gear subsequent to the crack-through failure of the planetary pinion gear.
A restraint assembly configured to restrict radial deflection of a planetary pinion gear during operation thereof subsequent to a crack-through failure of the planetary pinion gear, the restraint assembly comprising at least one washer including a flange around a circumference thereof, wherein an inner surface of the flange engages an outer circumferential edge of the planetary pinion gear subsequent to the crack-through failure of the planetary pinion gear.
A restraint assembly configured to inhibit at least one of radial and axial deflection of a planetary pinion gear during operation thereof subsequent to a crack-through failure of the planetary pinion gear, wherein the planetary pinion gear comprises top and bottom surfaces each including a channel disposed therein around a circumference thereof, the restraint assembly comprising:
- a first washer disposed over the top surface of the planetary pinion gear and comprising a flange along a circumference of the first washer;
- and
- a second washer disposed under the bottom surface of the planetary pinion gear and comprising a flange along a circumference the second washer;
- wherein the flange of the first washer is received in the channel disposed in the top surface of the planetary pinion gear and the flange of the second washer is received in the channel disposed in the bottom surface of the planetary pinion gear;
- and
- wherein during normal operation, surfaces of the flanges do not contact surfaces of the channels.
Dependencies are inferred from the claim text.