Blade fold Method and Apparatus for A Tilt Rotor Hub
First Claim
Patent Images
1. A folding rotor blade assembly for an aircraft, the folding rotor blade assembly comprising:
- a yoke;
an inboard beam coupled to the yoke;
an inboard centrifugal force bearing coupled to the inboard beam;
a grip coupled to the inboard beam;
an outboard bearing housing coupled to the grip; and
a rotor blade pivotally coupled to the grip by a blade fold bolt that is positioned outboard of the outboard bearing housing.
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Abstract
A folding rotor blade assembly for an aircraft a yoke, an inboard beam coupled to the yoke, an inboard centrifugal force bearing coupled to the inboard beam, a grip coupled to the inboard beam, an outboard bearing housing coupled to the grip, and a rotor blade pivotally coupled to the grip by a blade fold bolt that is positioned outboard of the outboard bearing housing.
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Citations
20 Claims
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1. A folding rotor blade assembly for an aircraft, the folding rotor blade assembly comprising:
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a yoke; an inboard beam coupled to the yoke; an inboard centrifugal force bearing coupled to the inboard beam; a grip coupled to the inboard beam; an outboard bearing housing coupled to the grip; and a rotor blade pivotally coupled to the grip by a blade fold bolt that is positioned outboard of the outboard bearing housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A folding rotor blade assembly for an aircraft, the folding rotor blade assembly comprising:
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a yoke connected to and axially aligned with a hub spring assembly; an inboard beam housing an inboard centrifugal force bearing, the inboard beam connected to the yoke; a grip connected at a first end to the inboard beam; an outboard bearing housing connected to a second end of the grip; an outboard bearing assembly coupled between the outboard bearing housing and the second end of the grip; a blade fold support connected to the grip and the outboard bearing housing; and a rotor blade connected to the grip at a pivotal connection positioned outboard of the outboard bearing assembly. - View Dependent Claims (12, 13, 14, 15)
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16. A method comprising:
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pitching a first rotor blade of a rotor blade assembly, the rotor blade assembly comprising; an inboard bearing assembly comprising an inboard centrifugal force bearing and connected to a yoke and a grip; an outboard bearing assembly connected to the yoke and the grip; a blade fold support connected to the grip; and wherein the first rotor blade is pivotally connected to the blade fold support via a blade fold bolt, the blade fold support configured to prevent a pivoting rotation of the first rotor blade relative to the yoke when the blade fold support is in a locked configuration, the blade fold bolt providing a pivot axis outboard of the outboard bearing assembly; unlocking the first rotor blade to allow the first rotor blade to pivot relative to the yoke; and rotating the first rotor blade about the pivot axis. - View Dependent Claims (17, 18, 19, 20)
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Specification