Pivot systems for tiltwing aircraft

Patent metadata

Field	Value
Publication number	US-10486806-B2
Application number	US-201615274040-A
Country	US
Kind code	B2
Filing date	Sep 23, 2016
Priority date	Oct 5, 2015
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A tiltwing aircraft includes a fuselage, an engine mounted stationary relative to the fuselage, and an opposed pair of wings. The wings are separated from each other with the fuselage therebetween, each wing independently mounted to the fuselage by a respective pivot system for rotation relative to the fuselage. An opposed pair of rotor assemblies is included, each operatively connected to a respective one of the wings for common rotation with the respective wing back and forth between a first position predominantly for lift to a second position predominantly for thrust.

First claim

What is claimed is:

1. A pivot system for a tiltwing aircraft comprising:
a gearbox;
a support shaft defining a wing tilt axis and comprising a gearbox mount mounted to the gearbox, the gearbox mount and gearbox being stationary relative to one another;
a bearing mounted to the support shaft radially outward of the support shaft about the wing tilt axis; and
a support fitting mounted to the bearing radially outward of the support shaft for rotation relative to the support shaft about the wing tilt axis, the support fitting attached to a wing for rotation relative to the support shaft.

2. A pivot system as recited in claim 1 , wherein the bearing includes an axially spaced pair of bearing races, each arranged between the support shaft and the support fitting.

3. A pivot system as recited in claim 1 , wherein the support shaft includes a passage defined axially therethrough for passage of a cross shaft along the wing tilt axis.

4. A pivot system as recited in claim 1 , wherein the support fitting includes at least one of a gear mesh or kinematic mechanism configured to connect to an actuator for actuation of the support fitting about the wing tilt axis.

Assignees

• Sikorsky Aircraft Corp

Inventors

• Alber Mark R

Classifications

• B64C5/02

  Tailplanes · CPC title

• B64C39/04

  having multiple fuselages or tail booms · CPC title

• B64C3/385

  Variable incidence wings · CPC title

• B64C29/0033 Primary

  the propellers being tiltable relative to the fuselage · CPC title

• B64D35/08

  characterised by the transmission being driven by a plurality of power plants (for hybrid-electric power plants B64D35/022) · CPC title