Hybrid metallic/composite piston head joint

Patent metadata

Field	Value
Publication number	US-10066649-B2
Application number	US-201514882200-A
Country	US
Kind code	B2
Filing date	Oct 13, 2015
Priority date	Oct 13, 2015
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

The present disclosure describes composite actuator piston rods and methods for making such rods. Composite actuator piston rods of the present disclosure may include a composite actuator rod tube having a flared end, an insert, wherein the insert has a complementary shape to the flared end, a piston head concentrically surrounding the flared end of the composite actuator rod tube, and a piston head nut configured to threadingly attach to the piston head.

First claim

What is claimed is:

1. An actuator comprising:
a composite actuator rod tube having a flared end;
an insert, wherein the insert has a complementary shape to the flared end;
a piston head concentrically surrounding the flared end of the composite actuator rod tube; and
a piston head nut concentrically surrounding the flared end of the composite actuator rod tube and configured to threadingly attach to the piston head.

2. The actuator of claim 1 , wherein the insert is configured to be positioned at least partially within the flared end.

3. The actuator of claim 1 , wherein the flared end is compressed between the piston head and the insert.

4. The actuator of claim 1 , further comprising a locking mechanism for securing the piston head to the piston head nut, wherein the locking mechanism comprises a locking pin coupled between the piston head and the piston head nut to prevent the piston head nut from rotating with respect to the piston head.

5. The actuator of claim 4 , wherein the locking pin is secured by a bearing, the bearing located radially outward from the locking pin.

6. The actuator of claim 1 , wherein the piston head comprises a sealing groove.

7. The actuator of claim 1 , wherein an outer surface of the insert includes a sealing groove.

8. The actuator of claim 1 , wherein an outer surface of the piston head nut includes a bearing groove.

9. A landing gear system comprising:
an actuator comprising:
a composite actuator rod tube having a flared end;
an insert, wherein the insert has a complementary shape to the flared end;
a piston head concentrically surrounding the flared end of the composite actuator rod tube; and
a piston head nut concentrically surrounding the flared end of the composite actuator rod tube and configured to threadingly attach to the piston head.

10. The landing gear system of claim 9 , wherein the insert is configured to be positioned at least partially within the flared end.

11. The landing gear system of claim 9 , wherein the flared end is compressed between the piston head and the insert.

12. The landing gear system of claim 9 , wherein an outer surface of the insert comprises a sealing groove.

13. The landing gear system of claim 9 , wherein at least one of the piston head, piston head nut, or the insert comprise a metallic material.

14. The landing gear system of claim 9 , wherein the actuator further comprises a locking mechanism for securing the piston head to the piston head nut.

15. A method for forming an actuator comprising:
forming a composite actuator rod tube having a flared end concentrically surrounding an insert having a complementary shape to the flared end;
surrounding the flared end with a piston head; and
surrounding the flared end with a piston head nut.

16. The method of claim 15 , further comprising sealing the actuator rod tube to the insert.

17. The method of claim 15 , further comprising sealing the piston head to the actuator rod tube.

18. The method of claim 17 , further comprising compressing the flared end between the insert and the piston head.

19. The method of claim 18 , further comprising locking the piston head nut to the piston head.

20. The actuator of claim 1 , wherein the piston head nut abuts an axially facing surface of the insert.

Assignees

• Goodrich Corp

Inventors

• Ganis Rony
• Bernard James
• Giannakopoulos Ioannis
• Chatzi Panagiota
• Higginbottom Thomas

Classifications

• F16J1/008

  with sealing lips · CPC title

• F16J1/006

  of different materials · CPC title

• B64C25/12

  sideways · CPC title

• F16C3/026

  Shafts made of fibre reinforced resin · CPC title

• F15B15/1447 Primary

  Pistons; Piston to piston rod assemblies · CPC title