Hybrid metallic/composite piston head joint

Patent metadata

Field	Value
Publication number	US-2017102012-A1
Application number	US-201514882200-A
Country	US
Kind code	A1
Filing date	Oct 13, 2015
Priority date	Oct 13, 2015
Publication date	Apr 13, 2017
Grant date	—

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 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.

5 . The actuator of claim 4 , 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.

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

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

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

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

10 . 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 configured to threadingly attach to the piston head.

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

12 . The landing gear system of claim 10 , wherein the flared end is compressed between the piston head and the insert.

13 . The landing gear system of claim 10 , wherein an outer surface of the insert comprises a sealing groove.

14 . The landing gear system of claim 10 , wherein at least one of the piston head, piston head nut, or the insert comprise a metallic material.

15 . The landing gear system of claim 10 , wherein the actuator further comprises a locking mechanism for securing the piston head to the piston head nut.

16 . 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.

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

18 . The method of claim 16 , further comprising surrounding the flared end with a piston head and sealing the piston head to the actuator rod tube.

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

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

Assignees

• Goodrich Corp

Inventors

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

Classifications

• F16C3/026

  Shafts made of fibre reinforced resin · CPC title

• F16J1/006

  of different materials · CPC title

• F16J1/005

  obtained by assembling several pieces · CPC title

• F15B15/1447 Primary

  Pistons; Piston to piston rod assemblies · CPC title

• B64C25/12

  sideways · CPC title