Uniball bearing with compliant inner member

Patent metadata

Field	Value
Publication number	US-11255379-B2
Application number	US-201716328671-A
Country	US
Kind code	B2
Filing date	Jul 19, 2017
Priority date	Sep 22, 2016
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

A spherical bearing which extends from and connects to a deformable component includes an outer member and an inner member. The inner member is pivotable relative to the outer member about an axis. The inner member has an opening formed therein that defines a plurality of coplanar contact surfaces shaped to accommodate and contact the component. The plurality of contact surfaces are movable to accommodate deformation of the component positioned within the opening.

First claim

What is claimed is:

1. A spherical bearing which extends from and connects to a deformable component comprising:
an outer member; and
an inner member pivotable relative to the outer member about an axis, the inner member having an opening formed therein that defines a plurality of coplanar contact surfaces shaped to accommodate and contact the component, wherein the plurality of contact surfaces are movable to accommodate the deformation of the component positioned within the opening, wherein a wear liner is disposed on an inner surface of the outer member between the outer member and the inner member.

2. The spherical bearing according to claim 1 , wherein the inner member comprises an elastomeric material.

3. The spherical bearing according to claim 1 , wherein the outer member has a generally concave surface and the inner member has a generally convex surface.

4. The spherical bearing according to claim 1 , wherein the inner member includes at least one recessed area arranged between adjacent contact surfaces.

5. The spherical bearing according to claim 1 , wherein the wear liner comprises a first liner, and the spherical bearing further comprises a second liner bonded to at least one of the plurality of contact surfaces of the inner member.

6. The spherical bearing according to claim 5 , wherein the second liner comprises a resilient material.

7. The spherical bearing according to claim 5 , wherein the second liner comprises a Teflon wear surface.

8. The spherical bearing according to claim 5 , further comprising a compressible member positioned within a recessed area between the inner member and the second liner.

9. The spherical bearing according to claim 8 , wherein the compressible member biases the second liner into contact with a wear surface of the component towards the opening.

10. A rotor system comprising:
a rotationally stationary swashplate pivotally mounted about a central pivot point defined along an axis of rotation via a spherical bearing;
a rotational swashplate which defines a rotor pitch control point, said rotor pitch control point defined along an in-line plane which passes through said central pivot point; and
a bearing system mounted between said rotationally stationary swashplate and said rotational swashplate, said bearing system having the spherical bearing for receiving a deformable component, the spherical bearing including:
an outer member; and
an inner member complementary to the outer member such that the inner member is pivotable relative to the outer member about an axis, an outer surface of the inner member being complementary to and dimensioned to contact an inner diameter of the outer member, the inner member having an opening formed therein that defines a plurality of coplanar contact surfaces shaped to accommodate and contact the component, the plurality of contact surfaces being spaced at intervals between a first end of the inner member and a second end of the inner member, wherein the plurality of contact surfaces are movable to accommodate deformation of the component.

11. The rotor system according to claim 10 , wherein the outer member has a generally concave surface and the inner member has a generally convex surface.

12. The rotor system according to claim 10 , wherein the inner member comprises an elastomeric material.

13. The rotor system according to claim 10 , wherein a wear liner is disposed on an inner surface of the outer member between the outer member and the inner member.

14. The rotor system according to claim 10 , further comprising a liner bonded to at least one of the plurality of contact surfaces of the inner member.

15. The rotor system according to claim 14 , wherein the liner comprises a resilient material.

16. The rotor system according to claim 14 , further comprising a compressible member positioned within the recessed area between the inner member and the liner.

17. The rotor system according to claim 16 , wherein the compressible member biases the liner into contact with a wear surface of the component towards the opening.

18. The rotor system according to claim 10 , wherein the rotor system is a portion of an aircraft.

Assignees

• Sikorsky Aircraft Corp

Inventors

• Baskin Bryan Kenneth
• Orbon James
• Poulin Stephen V

Classifications

• F16C23/043

  with spherical surfaces, e.g. spherical plain bearings · CPC title

• F16C27/02

  Sliding-contact bearings · CPC title

• F16C2326/43

  Aeroplanes; Helicopters · CPC title

• F16C23/046

  with split outer rings · CPC title

• F16C25/04 Primary

  self-adjusting · CPC title