Fastening socket for assembling structures and associated attachment

Patent metadata

Field	Value
Publication number	US-11999031-B2
Application number	US-201816649138-A
Country	US
Kind code	B2
Filing date	Sep 21, 2018
Priority date	Sep 21, 2017
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

The present invention concerns a fastening socket (112) for assembling at least two previously drilled structures, said socket comprising a substantially cylindrical body (34) and an enlarged head (35); said enlarged head comprising first mounting surfaces (42, 46) suitable for being assembled to a first installation component and for preventing said first installation component from rotating about the main axis. The socket comprises a first substantially cylindrical recess (40) extending along the main axis from the first end, said first recess ending at a planar shoulder (44) substantially perpendicular to said main axis, the first recess and the planar shoulder being received inside the enlarged head, the first mounting surfaces (42, 46) being formed by an inner surface of the first recess.

First claim

The invention claimed is:

1. Fastening socket for assembling at least two previously drilled structures, said socket extending along a main axis between a first and a second open ends, said socket comprising a substantially cylindrical body and an enlarged head;
said enlarged head comprising first mounting surfaces capable of being assembled to a first installation element and for rotationally locking said first installation element about the main axis,
characterised in that it comprises a first recess substantially cylindrical extending along the main axis from the first end, said first recess leading to a planar shoulder substantially perpendicular to said main axis, the first recess and the planar shoulder being received inside the enlarged head, the first mounting surfaces are formed by an inner surface of the first recess; and
wherein first mounting surfaces extend from the first end of the socket but do not reach the planar shoulder, the first mounting surfaces thereby defining a recessed volume with said planar shoulder.

2. Fastening socket according to claim 1 , wherein the first mounting surfaces comprise flats formed radially protruding or recessed relative to a cylindrical inner surface of the first recess.

3. Fastener for assembling at least two pre-drilled structures, comprising:
a fastening socket according to claim 1 , and
an elongated element movable inside the socket, said elongated element comprising a substantially cylindrical rod and a head arranged at a first end of said rod,

said head of the elongated element comprises a second recess substantially cylindrical extending along the main axis, said second recess comprising second mounting surfaces capable of being assembled to a second installation element and rotationally secure the elongate element and said second installation element about the main axis.

4. Fastener according to claim 3 , wherein the socket comprises an inner ring for axially guiding the rod of the elongate element, said ring extending radially from an inner surface of the body.

5. Fastener according to claim 3 , in which the rod of the elongate element is provided with a thread.

6. Fastener according to claim 3 , further comprising a hooking element, said hooking element comprising:
a base capable of sliding in the socket along the main axis, said base comprising a central opening; and
tabs connected to said base around the central opening, said tabs extending through the second open end of the socket, each tab comprising a hooking lip;

the elongated element being movable along the main axis in the central opening of the base, so as to radially move the tabs between a retracted position and an extended position.

7. Fastener according to claim 6 , wherein the rod of the elongate element is provided with a thread, wherein the central opening of the base is provided with an internal thread complementary to the thread of the rod of the elongate element.

8. Fastener according to claim 6 , wherein a second end of the elongated element comprises a lug extending along the main axis from the rod, said lug having a transverse dimension smaller than a transverse dimension of the rod, the fastener further comprising a ring assembled to said lug, said ring forming an axial stop with respect to the base of the coupling element.

9. Fastener according to claim 8 , wherein the ring comprises a first and a second substantially cylindrical portions, aligned axially, said first and second portions respectively having a diameter and greater than a minimum diameter of the central opening of the base, a junction between said first and second portions forming the axial stop.

10. Setting nose for assembling a fastener according to claim 3 with at least two pre-drilled structures, said setting nose comprising:
a first installation element of tubular shape, said first installation element having a front portion capable of fitting into the first recess of the enlarged head of the socket, said first installation element being configured to fit together with the first mounting surfaces of the enlarged head so as to block the socket in rotation about the main axis; and
a second installation element arranged inside the first installation element, said second installation element comprising a tip configured to fit into the second recess of the head of the elongate element and to join the second mounting surfaces, the second installation element being able to exert a torsional torque on said elongate element.

11. Setting nose according to claim 10 , further comprising a tubular blocking element movable in rotation inside the first installation element, the second installation element being arranged inside said blocking element, an axial end of said blocking element having a collar extending radially outwards, the front portion of the first installation member and the collar respectively have a first and a second radial surfaces of identical cross-section, the setting nose being such that, in a first installation configuration, said first and second radial surfaces are axially aligned, said collar thus being able to fit into the first recess of the enlarged head of the socket, so as to bear axially on the one hand against the planar shoulder of the socket and on the other hand against the front part of the first installation element.

12. Setting nose according to claim 11 , wherein the first and second radial surfaces are configured such that, in a second locking configuration, a portion of the second radial surface forms an external projection with respect to the first radial surface.

13. Assembly for installing a fastener for assembling at least two pre-drilled structures comprising:
a fastening socket, said socket extending along a main axis between a first and a second open ends, said socket comprising a substantially cylindrical body and an enlarged head;
said enlarged head comprising first mounting surfaces capable of being assembled to a first installation element and for rotationally locking said first installation element about the main axis,
characterised in that it comprises a first recess substantially cylindrical extending along the main axis from the first end, said first recess leading to a planar shoulder substantially perpendicular to said main axis, the first recess and the planar shoulder being received inside the enlarged head, the first mounting surfaces are formed by an inner surface of the first recess,
an elongated element movable inside the socket, said elongated element comprising a substantially cylindrical rod and a head arranged at a first end of said rod, said head of the elongated element comprises a second recess substantially cylindrical extending along the main axis, said second recess comprising second mounting surfaces capable of being assembled to a second installation element and rotationally secure the elongate element and said second installation element about the main axis,
and a setting nose according to claim 12 , said fastener and said setting nose being configured such that, in the second locking configuration, the collar is able to be axially locked between the planar shoulder and the first mounting surfaces of the socket.

14. Assembly according to claim 13 , wherein the fastener comprises a socket wherein first mounting surfaces extend from the first end of the socket but do not reach the planar shoulder, the first mounting surfaces thereby defining a recessed volume with said planar shoulder, the flange of the setting nose being able to be axially locked in the hollow volume of the socket.

Assignees

• Lisi Aerospace

Inventors

• Palette Steven
• Brachet Julien
• Defrance Vincent

Classifications

• B25B13/488 Primary

  for connections where two parts must be turned in opposite directions by one tool · CPC title

• B25B23/0085

  Counterholding devices · CPC title

• B25B31/005

  for temporarily connecting sheets before or during assembly operations · CPC title

• F16B19/109

  Temporary rivets, e.g. with a spring-loaded pin (special clamping devices for workpieces to be riveted together, e.g. operating through the rivet holes B21J15/42; hand tools for temporarily connecting sheets before or during assembly operations B25B31/005) · CPC title