High shear capability interface

• US 9,212,679 B2
• Filed: 11/22/2013
• Issued: 12/15/2015
• Est. Priority Date: 11/22/2013
• Status: Active Grant

• Current Assignee: Sikorsky Aircraft Corporation (Martin Marietta Corporation)
• Original Assignee: Sikorsky Aircraft Corporation (Martin Marietta Corporation)
• Inventors: Gmirya, Yuriy, Karlak, Matthew J., Meeson, John H. Jr.
• Primary Examiner(s): DELISLE, ROBERTA S
• Application Number:
  US14/087,464
• Publication Number:
  US 20150147132A1
• Time in Patent Office: 753 Days
• Field of Search: 411/383
• US Class Current: 1/1
• CPC Class Codes: F16B 19/00 Bolts without screw-thread; Pins, including deformable elements in screwed connections F16B29/00; Rivets means for preventing withdrawal F16B21/00
• CPC Class Codes: F16B 19/02 Bolts or sleeves for positioning of machine parts, e.g. notched taper pins, fitting pins, sleeves, eccentric positioning rings
• CPC Class Codes: F16B 21/10 by separate parts F16B21/06 takes precedence; key-type connection F16B3/00; locking screws or nuts against rotation by such means F16B39/04
• CPC Class Codes: F16B 31/00 Screwed connections specially modified in view of tensile load; Break-bolts shape of thread F16B33/02; in couplings F16D9/00
• CPC Class Codes: F16B 5/02 by means of fastening members using screw-thread F16B5/0004 takes precedence; construction of screw-threaded connections F16B25/00 - F16B39/00
• CPC Class Codes: Y10T 29/4984 Retaining clearance for motion between assembled parts

Abstract

A connection between a first component and a second component is provided including a first hole formed in a portion of the first component and a second hole formed in a portion of the second component. The second hole is aligned with the first hole. A pin includes a through hole having a pin hole diameter. The pin extends through a portion of the first hole and into a first portion of the second hole. The pin is configured to absorb a shear load applied to the connection. A bolt extends through the second hole and the pin such that a clearance fit is formed between the bolt and the pin. The bolt is configured to absorb an axial load applied to the connection. A nut connected to the free end of the bolt limits movement of the bolt relative to the first and second component.

Claims

1. A connection between a first component and a second component comprising:

a first hole formed in a portion of the first component;

a second hole formed in a portion of the second component, the second hole being aligned with the first hole;

a pin including a through hole having a pin hole diameter, the pin extending through a portion of the first hole and into a first portion of the second hole, the pin being configured to absorb a shear load applied to the connection;

a bolt extending through the second hole and the pin, the bolt having an outer diameter smaller than the pin hole diameter such that a clearance fit is formed between the bolt and the pin, the bolt being configured to absorb an axial load applied to the connection; and

a nut connected to a free end of the bolt to limit movement of the bolt relative to the first component and the second component.

2. The connection according to claim 1, wherein a diameter of the first hole and a diameter of the first portion of the second hole are substantially identical.

3. The connection according to claim 2, wherein the outer diameter adjacent a second end of the pin gradually decreases to form a ramp section.

4. The connection according to claim 2, wherein the pin hole diameter of the pin adjacent the first end includes a plurality of threads.

5. The connection according to claim 2, wherein the flange is positioned adjacent a surface of the first component.

6. The connection according to claim 1, wherein the pin further comprises:

a cylindrical body having an outer diameter generally constant over a length of the pin; and

a flange mounted at a first end of the generally cylindrical body, wherein the through hole extends through both the cylindrical body and the flange.

7. The connection according to claim 1, further comprising:

a first bushing arranged within the first hole and configured to receive a body of the pin; and

a second bushing arranged within the second hole and configured to receive an end of the pin.

8. The connection according to claim 7, wherein a washer is arranged within the second portion of the second hole between the head of the bolt and the adjacent surface of the second component.

9. The connection according to claim 1, wherein a head of the bolt is arranged within a second portion of the second hole, adjacent a surface of the second component.

10. The connection according to claim 1, wherein a nut plate is arranged between the nut and a portion of the pin.

11. The connection according to claim 1, wherein the first component is a gearbox housing of a rotary wing aircraft and the second component is an airframe of rotary wing aircraft.

12. The connection according to claim 1, wherein the first component has a first coefficient of thermal expansion and the second component has a second coefficient of thermal expansion other than the first coefficient of thermal expansion.

13. A method of forming a connection between a first component and a second component comprising:

inserting a pin through a portion of a first hole formed in the first component and into a portion of a second hole formed in the second component, the pin being configured to absorb a shear load applied to the connection;

inserting a bolt into the second hole and through a through hole of the pin, the bolt being configured to absorb an axial load applied to the connection, wherein a clearance fit is formed between the bolt and the pin; and

coupling a nut to a free end of the bolt to retain the bolt in position relative to the first component and the second component.

14. The method according to claim 13, wherein the pin is inserted into the first hole such that a flange of the pin is adjacent a surface of the first component.

15. The method according to claim 13, wherein the bolt is inserted into the second hole such that a head of the bolt is adjacent a surface of the second component.

16. The method according to claim 13, further comprising installing a first bushing configured to receive a body of the pin in the first hole.

17. The method according to claim 16, further comprising installing a second bushing configured to receive the end of the pin in the second hole.

18. The method according to claim 13, further comprising installing a washer between a head of the bolt and a surface of the second component.

19. The method according to claim 13, further comprising installing a nut plate between the nut and a surface of the pin.