Device for securing an insert in a structure

Abstract

The invention concerns a device for securing an insert in a structure having a first opening, the insert having a principal body (20) inserted in the first opening, the body (20) having a second opening having a principal axis, the device including a shaft (23) designed to pass through the second opening and at least one detachable or non-detachable head (24, 42).

Description

DRAWINGS

In different possible embodiments, the invention will be described in more detail with reference to the attached drawings in which:

FIG. 1 schematically represents a device of the prior art for securing an insert onto an engine mount yoke;

FIG. 2 is a sectional view of FIG. 1;

FIG. 3 is a schematic representation of another device of the prior art for securing an engine/system interface represented in FIGS. 1 and 2;

FIG. 4 is a sectional view of FIG. 3;

FIG. 5 schematically represents an insert fastened onto a structure, notably a yoke, by a securing device according to a first embodiment of the invention;

FIG. 6 is a profile view of the securing device of FIG. 5;

FIG. 7 is an exploded view of the securing device of FIG. 5;

FIG. 8 is a sectional view of an insert secured onto a structure, particularly a yoke, by a securing device according to a second embodiment of the invention;

FIG. 9 is a partial sectional view of an insert fastened onto a structure, particularly a yoke, by a securing device according to a third embodiment of the invention, in which the principal body of the insert has a base.

DETAILED DESCRIPTION

FIG. 5 shows an insert secured onto a structure, particularly a yoke, by a securing device according to a first embodiment of the invention. An insert 20 comprises a principal body that is inserted into an opening defined by two lugs 21, 22 of the yoke. This securing device comprises a shaft 23 passing into an opening of the principal body of the insert, this shaft having a head 24. It also comprises two planar parts 25, 26 having a third opening through which shaft 23 passes. These planar parts 25, 26 each take support on an outer face of the structure, i.e., lugs 21, 22, in order to keep principal body 20 inside the opening of the structure. The opening of each of planar parts 25, 26 is then centered on the opening of principal body 20 in order to permit the passage of fastening shaft 23.

The device comprises a system for blocking each of parts 25, 26 from rotating relative to principal body 20. This locking system has two projections 27, 28, for example pins, positioned on one face of each of planar parts 25, 26. These projections 27, 28 cooperate with corresponding recesses 29, 30 made in the ends of principal body 20 in order to join each of these parts with the principal body and thus prevent any rotation of these parts relative to principal body 20.

Alternatively, two recesses made on one face of each planar part 25, 26 cooperate with two corresponding projections made at the ends of principal body 20. The number of projections or recesses is, however, not limited and can be advantageously greater than two.

The device also comprises a first element for joining head 24 of shaft 23 onto planar part 25 on which it will be supported, as well as a second element for joining a nut that will secure the other planar part 26 onto the outer surface of lug 21. These joining elements permit locking each of the detachable or non-detachable heads onto the corresponding planar part 25, 26.

The first joining element is a safety wire 31 that is inserted on one side in a cavity 32 of head 24 of shaft 23 and, on the other side is joined to planar part 26. This safety wire 31 comprises, for example, at its end, a stop 35 that is inserted into a drilled hole 44 of planar part 26.

The second joining element is a plate 33 of one piece with the nut. This plate 33 comprises two drilled holes to receive fastening components such as rivets 34.

FIG. 7 represents an exploded perspective view of the securing device permitting the assembly of its elements to be easily distinguished.

FIG. 8 represents a securing device according to a second embodiment of the invention. The elements of FIG. 8 bearing the same references as the elements of FIGS. 5 to 7 represent the same objects.

This embodiment differs from the preceding one in that insert 20 has a hollow principal body that also has a more or less longitudinal bead 36 on its inner surface, this bead 36 being continuous or non-continuous. It may also involve bead portions placed only at the level of the ends of insert 20.

The locking system comprises two centering washers 37, comprising a fourth opening 38, designed for passage of said shaft 23. Each of said washers 37 has a notch 39 designed to cooperate with said bead 36 in order to block the corresponding centering washer 37 from rotation relative to principal body 20.

However, washers 37 can have two notches 39, or more, cooperating with more beads 36 or portions of bead in order to block centering washer 37 from rotating relative to principal body 20.

Each centering washer 37 also comprises a recess, here an opening 40 to receive a projection, such as a pin 41, placed on the corresponding planar part 25, 26. These projections 41 and these corresponding recesses 40 cooperate in order to block each planar part 25, 26 from rotating relative to the corresponding centering washer 37.

Again, detachable or non-detachable heads 24, 42 on shaft 23 are thus immobilized from rotation relative to the principal body 20 of the insert.

FIG. 9 shows a securing device according to a third embodiment of the invention. The elements of FIG. 9 bearing the same references as the elements of FIGS. 5 to 7 represent the same objects.

This insert is particular in that it has a hollow principal body 20 and a base 43 joined to this principal body 20. This base 43 and hollow principal body 20 form a single piece. One of the two planar parts 25, 26 described above in the first two embodiments is this base 43, which can be supported on the outer surface of one of the two lugs 21, 22.

As in the two first embodiments, this base 43 that replaces one of the two planar parts 25, 26 is joined to nut 42, taking support on its outer surface by a joining element housing a plate 33 and two rivets 34.

Alternatively, if base 43 is found on the side of a head 24 (not shown) forming a single piece with said shaft 23, then this head 24 is joined to base 43 by a joining element of the safety wire type 31 as described above.

Alternatively to all the embodiments previously described, the securing device does not have a head forming a single piece with shaft 23, but rather it comprises two detachable heads, for example nuts, each joined to a planar part, that are fastened to the planar part by means of fastening components such as rivets.

Alternatively, the joining element serving to join the detachable head to the corresponding planar part can be a safety wire inserted on one side into a cavity of said detachable head and joined on the other side to the planar part, for example, by a stop placed at the end of the safety wire.

Claims

1. A device for securing an insert in a structure having a first opening, said insert having a principal body (20) inserted into said first opening, said body (20) having a second opening having a principal axis, said device comprising a shaft (23) designed to pass through said second opening, and at least one detachable or non-detachable head (24, 42), characterized in that it comprises: at least one roughly planar part (25, 26, 43) having a third opening, said part being designed to be placed on an outer face of said structure (21, 22) so that said third opening is centered on said second opening for the passage of said shaft (23), said part (25, 26, 43), locking said insert in said first opening,a system for blocking said part (25, 26, 43) from rotating relative to principal body (20), andan element for joining said head onto said part (25, 26, 43) to lock said head onto said part, said head being designed to be supported against said part (25, 26, 43) in order to secure the part against said outer surface.

2. The device according to claim 1, further characterized in that said principal body comprises at least one projection (27, 28) or one recess (29, 30) positioned on at least one of its ends, while said locking system comprises at least one corresponding recess (29, 30) or projection (27, 28) positioned on said part (25, 26, 43), said projections (27, 28) and said corresponding recesses (29, 30) cooperating in order to join said part (25, 26, 43) and said principal body (20).

3. The device according to claim 1, further characterized in that said principal body (20) is hollow and has at least one longitudinal bead (36) on its inner surface, while said locking system has at least one centering washer (37) comprising a fourth opening designed for passage of said shaft (23), said washer (37) having at least one notch (39) designed to cooperate with said bead (36) in order to block said washer from rotating relative to said principal body (20), and in that said washer (37) comprises at least one projection (41) or one recess (40) and said corresponding part (25, 26, 43) comprises at least one recess (40) or one projection (41), said projections (41) and said corresponding recesses (40) cooperating to block said part (25, 26, 43) from rotating relative to said centering washer (37).

4. The device according to claim 1, further characterized in that it has two roughly planar parts (25, 26, 43) each having a third opening, said parts (25, 26, 43) being designed to each be positioned on either side of principal body (20) on one outer face of said structure so that said third opening is centered on said second opening for passage of said shaft (23).

5. The device according to claim 4, further characterized in that said insert has a base (43) forming a single piece with said principal body (20), [and] one of said parts (25, 26, 43) is said base (43).

6. The device according to claim 1, further characterized in that it comprises a detachable head (42) placed at the other end of shaft (23), said head being joined to said part (25, 26, 43) on which it is designed to be locked by a joining element (31, 33-35).

7. The device according to claim 1, further characterized in that said joining element is a safety wire (31) designed to be inserted on one side in a cavity (32) of said detachable or non-detachable head, and joined on the other side to said part (25, 26, 43).

8. The device according to claim 1, further characterized in that if said head (24, 42) is a detachable head, said detachable head is a nut (42) joined to a plate (33), said plate (33) comprising two drilled holes to receive fastening components (34).

9. The device according to claim 1, further characterized in that all of said elements of said device are made of one or more chosen from the group comprising steel, stainless steel, carbon steel and Inconel.