Hybrid pitch bearing for rigid rotor
AssigneeLockheed Martin Corporation
InventorsKevin A. Laitenberger, Claude George Matalanis, Yair Preiss, Joseph Thomas Palombo, Andrew Hunt
Life of this patent
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Abstract
A rotor assembly for a rotary wing aircraft includes a rotor hub, a rotor blade coupling coupled to the rotor hub, a hub extender coupled to the rotor hub, and a first bearing assembly. The first bearing assembly includes a clevis coupled to the hub extender and including two arms, each arm including a clevis opening, two cylindrical bearings, each cylindrical bearing extending through one of the clevis openings, a spherical bearing positioned between the two arms and coupled to the rotor blade coupling, and a first pin extending through the two cylindrical bearings and the spherical bearing.
Claims10
A rotor assembly for a rotary wing aircraft, the rotor assembly comprising:
- a rotor hub;
- a rotor blade coupling coupled to the rotor hub;
- a hub extender coupled to the rotor hub;
- and
- a first bearing assembly comprising:
- a clevis coupled to the hub extender and comprising two arms, each arm comprising a clevis opening;
- two cylindrical bearings, each cylindrical bearing extending through one of the clevis openings;
- a spherical bearing positioned between the two arms and coupled to the rotor blade coupling;
- and
- a first pin extending through the two cylindrical bearings and the spherical bearing, wherein the first pin extends along a pitch axis of the rotor blade.
A rotor assembly for a rotary wing aircraft, the rotor assembly comprising:
- a rotor hub;
- a rotor blade coupling coupled to the rotor hub;
- a hub extender coupled to the rotor hub;
- and
- a first bearing assembly comprising:
- a clevis coupled to the hub extender and comprising two arms, each arm comprising a clevis opening;
- two cylindrical bearings, each cylindrical bearing extending through one of the clevis openings;
- a spherical bearing positioned between the two arms and coupled to the rotor blade coupling;
- and
- a first pin extending through the two cylindrical bearings and the spherical bearing,
- wherein the first pin is translatable relative to the clevis along a longitudinal axis of the first pin such that the rotor blade coupling is translatable relative to the hub extender.
Dependencies are inferred from the claim text.