Removable struts for vibration isolation device mounting system

Patent metadata

Field	Value
Publication number	US-11485484-B2
Application number	US-202117186484-A
Country	US
Kind code	B2
Filing date	Feb 26, 2021
Priority date	Jun 27, 2018
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

A strut assembly for a vibration isolation device is disclosed, comprising a piston spindle; a first elastomeric member and a second elastomeric member bonded to the piston spindle and in contact with an upper housing and a lower housing, respectively; a first strut support and a second strut support attached to or integral with the upper housing and the lower housing, respectively; a first strut spindle and the second strut support configured to be placed in the first strut support and the second strut support, respectively; and one or more removable struts configured to be engaged to the first strut spindle and to the second strut spindle, wherein at least one of the first or second strut spindles is removable such that the one or more struts can be replaced without breaking a bonding of the first elastomeric member, the second elastomeric member, or both.

First claim

What is claimed is:

1. A strut assembly for a vibration isolation device comprising:
a first strut spindle configured to be placed in a first strut support of the vibration isolation device;
a second strut spindle configured to be placed in a second strut support of the vibration isolation device; and
one or more removable struts configured to be engaged at a first end to the first strut spindle without engagement of the first end to the first strut support and at a second end to the second strut spindle without engagement of the second end to the second strut support.

2. The assembly of claim 1 , wherein the one or more removable struts is configured to be threaded or slotted at a first end to the first strut spindle and configured to be threaded or slotted at a second end to the second strut spindle.

3. The assembly of claim 1 , wherein the one or more removable struts further comprise one or more surfaces on at least a portion of the strut to be engaged by a wrench.

4. The assembly of claim 1 , wherein the vibration isolation device further comprises:
a piston spindle;
a first elastomeric member bonded to the piston spindle;
a second elastomeric member bonded to the piston spindle;
an upper housing in contact with the first elastomeric member;
a lower housing in contact with the second elastomeric member;
the first strut support attached to, or integral with, the upper housing; and
the second strut support attached to, or integral with, the lower housing.

5. The assembly of claim 4 , wherein at least one of the first or second strut spindles is removable such that the one or more struts can be replaced without breaking a bonding of the first elastomeric member, the second elastomeric member, or both.

6. The assembly of claim 4 , wherein the first elastomeric member or the second elastomeric member comprises rubber, plastics, composites, or layered materials.

7. A method of replacing a strut of a vibration isolation device, the method comprising:
extracting the strut from the vibration isolation device;
placing a first strut spindle in a first strut support of the vibration isolation device;
engaging a first end of a new strut to the first strut spindle without engagement of the first end of the new strut to the first strut support; and
placing a second strut spindle in a second strut support of the vibration isolation device and engaging a second end of the new strut without engagement of the second end of the new strut to the second strut support.

8. The method of claim 7 , wherein the new strut is threaded or slotted at a first end to the first strut spindle and threaded or slotted at a second end to the second strut spindle.

9. The method of claim 7 , further comprising engaging one or more surfaces on at least a portion of the strut with a wrench.

10. The method of claim 7 , further comprising disengaging a first end of the strut and the first strut spindle or disengaging a second end of the strut and the second strut spindle.

11. The method of claim 7 , further comprising providing the vibration isolation device, wherein the vibration isolation device comprises:
a piston spindle;
a first elastomeric member bonded to the piston spindle;
a second elastomeric member bonded to the piston spindle;
an upper housing in contact with the first elastomeric member;
a lower housing in contact with the second elastomeric member;
the first strut support attached to, or integral with, the upper housing; and
the second strut support attached to, or integral with, the lower housing.

12. The method of claim 11 , wherein the strut is replaced without breaking a bonding of the first elastomeric member, the second elastomeric member, or both.

13. The method of claim 11 , wherein the first elastomeric member or the second elastomeric member comprises rubber, plastics, composites, or layered materials.

14. The method of claim 11 , further comprising applying a load to displace either the first elastomeric member or the second elastomeric member without breaking a bond of the first elastomeric member, the second elastomeric member, or both with the piston spindle.

15. A rotorcraft comprising:
a fuselage;
one or more engines; and
a vibration isolation device coupled to the fuselage:
one or more strut assemblies, each strut assembly comprising:
a first strut spindle configured to be placed in a first strut support of the vibration isolation device,
a second strut spindle configured to be placed in a second strut support of the vibration isolation device, and
one or more removable struts configured to be engaged at a first end to the first strut spindle without engagement of the first end to the first strut support and at a second end to the second strut spindle without engagement of the second end to the second strut support.

16. The rotorcraft of claim 15 , wherein the one or more removable struts is configured to be threaded or slotted at a first end to the first strut spindle and configured to be threaded or slotted at a second end to the second strut spindle.

17. The rotorcraft of claim 15 , wherein the one or more removable struts further comprise one or more surfaces on at least a portion of the strut to be engaged by a wrench.

18. The rotorcraft of claim 15 , wherein the vibration isolation device further comprises:
a piston spindle;
a first elastomeric member bonded to the piston spindle;
a second elastomeric member bonded to the piston spindle;
an upper housing in contact with the first elastomeric member;
a lower housing in contact with the second elastomeric member;
the first strut support attached to, or integral with, the upper housing; and
the second strut support attached to, or integral with, the lower housing.

19. The rotorcraft of claim 18 , wherein at least one of the first or second strut spindles is removable such that the one or more struts can be replaced without breaking a bonding of the first elastomeric member, the second elastomeric member, or both.

20. The rotorcraft of claim 18 , wherein the first elastomeric member or the second elastomeric member comprises rubber, plastics, composites, or layered materials.

Assignees

• Bell Textron Inc
• Textron Innovations Inc

Inventors

• Wiinikka Mark
• Hemmen Scott
• Green Nathan P
• Blake James

Classifications

• F16F13/24

  the central part of the unit being supported by one element and both extremities of the unit being supported by a single other element, i.e. double acting mounting · CPC title

• F16F13/103

  characterised by method of assembly, production or treatment · CPC title

• B64C27/001 Primary

  Vibration damping devices · CPC title

• B64C2027/002

  mounted between the rotor drive and the fuselage · CPC title

• F16F13/085

  characterised by features of plastics springs; Attachment arrangements · CPC title