Nut assembly and nut mounting structure

Abstract

The utility model discloses a nut assembly and a nut mounting structure. The nut assembly can be installed in the assembly hole, and the nut assembly comprises a nut and a support for supporting the nut; wherein the support is provided with a main body part, the main body part is provided with a first side face and a second side face opposite to the first side face, a through hole and attachment holes located in the two sides of the through hole are formed in the main body part, and the nut is connected to the first side face of the support; the nut assembly also includes an insert attachable to the bracket, the insert having a first portion and a second portion, where an end of the first portion is provided with an attachment portion, the second portion being shape-fitted to one end of the fitting hole. According to the nut assembly provided by the utility model, the installation of the nut assembly does not need to use a riveting fastener, and the strength of the structure cannot be damaged in the riveting process, so that the nut assembly provided by the utility model is particularly suitable for composite materials. Therefore, the use scene of the nut assembly is more flexible.

Description

Technical Field

[0001] The utility model relates to the technical field of installing fasteners, in particular to a nut installation structure used in aircraft assembly. Background Art

[0002] When assembling an aircraft, there are areas that are not open and have insufficient installation space, such as wing movable surfaces and maintenance covers. For these installation areas, support nuts are usually pre-installed on the blind side of the installation area to achieve single-sided installation of bolts and nuts.

[0003] Currently, the mainstream fastening methods suitable for the above installation on the market include three types: riveted support plate nuts, bonded support plate nuts and extruded support plate nuts.

[0004] Riveted pallet nuts typically use rivets or blind rivets to rivet the pallet of a double-ear or single-ear pallet nut to a blind surface of the assembled structure. This requires pre-fabricated rivet holes in the assembled structure for riveting, which can reduce the strength and fatigue performance of the assembled structure. Furthermore, in composite structures, the impact of the rivet gun during riveting can cause damage such as delamination. Therefore, riveted pallet nuts are not suitable for composite structures.

[0005] Extruded pallet nuts typically utilize a mandrel with a larger diameter than the hole, threaded through a slotted bushing, and secure the bracket of the extruded rivetless pallet nut in the hole. This installation requires the consumption of the slotted bushing and the use of specialized pull-rivet installation tools, resulting in high installation costs.

[0006] Adhesive mounting nuts primarily use adhesive to secure the mounting nut to a connecting plate in the blind face of the assembly. This installation method eliminates the need for riveting and requires no holes. However, it can lead to weak adhesion in areas with high levels of oil and moisture. Furthermore, the adhesive takes a long time to cure, resulting in inefficient installation.

[0007] Therefore, it is desirable to provide a suitable nut assembly that does not require the use of rivets or adhesives, does not damage the structural strength of the assembled structure, and can be quickly installed. Utility Model Content

[0008] In order to overcome the deficiencies in the prior art, the present invention provides a nut assembly, which can be installed in an assembly hole, and the nut assembly includes a nut and a bracket supporting the nut; wherein, the bracket has a main body portion, the main body portion has a first side surface and a second side surface opposite to the first side surface, the main body portion forms a through hole and attachment holes located on both sides of the through hole, and the nut is connected to the first side surface of the bracket; the nut assembly also includes a plug-in capable of being attached to the bracket, the plug-in having a first part and a second part, wherein the end of the first part is provided with an attachment portion inserted into the attachment hole of the bracket, and the second part is shape-fitted to one end of the assembly hole.

[0009] According to one aspect of the present invention, the bracket in the nut assembly has: a nut holding portion, which is arranged on the first side surface; and a guide extending from the second side surface, which is configured to guide the plug-in.

[0010] According to another aspect of the present invention, the guide member and the first portion of the plug-in unit are both cylindrical and coaxially arranged, and the guide member is located inside the plug-in unit.

[0011] According to another aspect of the present invention, the attachment hole passes through from the first side to the second side; the attachment portion of the plug-in is two or more protrusions protruding from the end of the first part, and the protrusions are arranged at equal intervals around the end of the first part; the protrusions pass through and protrude from the attachment hole, and the protrusions can be bent.

[0012] According to another aspect of the present invention, the nut includes a nut body and a flange located at one end of the nut body and extending outward around the nut body, and the nut retaining portion of the bracket is a slot suitable for inserting the flange.

[0013] According to another aspect of the present invention, a limiting member is further provided on the bracket, and the limiting member is configured to limit the position of the nut on the bracket.

[0014] According to another aspect of the present invention, the limiting member includes two protrusions protruding from the first side surface of the bracket. After the nut is fitted into the nut retaining portion, the two protrusions abut against the side of the flange to prevent the nut from moving.

[0015] In addition, the utility model also provides a nut mounting structure, which includes the nut assembly as described above; in addition, the nut mounting structure also includes an assembly hole arranged on the structure to be assembled, wherein both ends of the assembly hole are countersunk holes, and the countersunk holes are respectively matched with the main body of the bracket and the second part of the plug-in.

[0016] According to another aspect of the present invention, the second portion of the plug-in is formed into a conical shape, and one of the counterbores of the assembly hole is a conical counterbore.

[0017] According to the nut assembly of the present invention, the nut assembly can be installed without using riveting fasteners, the riveting process will not damage the strength of the structure, and the material selection of the nut assembly is more flexible. Therefore, the use scenario of the nut assembly according to the present invention is more flexible.

[0018] In addition, the nut assembly according to the present invention does not require adhesives, and thus has higher installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] For a more complete understanding of the present invention, reference may be made to the following description of exemplary embodiments considered in conjunction with the accompanying drawings, in which:

[0020] Figure 1 A front view of a bracket nut assembly in a nut assembly according to a preferred embodiment of the present utility model is shown.

[0021] Figure 2 A side view of a bracket nut assembly in a nut assembly according to a preferred embodiment of the present utility model is shown.

[0022] Figure 3 A front view of an insert in a nut assembly according to a preferred embodiment of the present utility model is shown.

[0023] Figure 4 A side view of an insert in a nut assembly according to a preferred embodiment of the present invention is shown.

[0024] Figure 5 A schematic diagram showing the assembly of the bracket nut assembly into the mounting hole in the nut assembly according to a preferred embodiment of the present utility model is shown.

[0025] Figure 6 A schematic diagram showing the assembly of a nut assembly into an assembly hole according to a preferred embodiment of the present utility model is shown.

[0026] Reference Signs List

[0027] 1 nut assembly

[0028] 10 nuts

[0029] 11 Nut body

[0030] 12 flanges

[0031] 20 brackets

[0032] 21 Main body

[0033] 211 First Side

[0034] 212 Second Side

[0035] 22 nut retaining portion

[0036] 23 through holes

[0037] 24 attachment holes

[0038] 25 protrusion

[0039] 26 semicircular protrusions

[0040] 28 guides

[0041] 30 plugins

[0042] 31 Part 1

[0043] 32 Part 2

[0044] 33 convex pieces

[0045] 50 assembly holes

[0046] 60 Assembly structure DETAILED DESCRIPTION

[0047] The present invention is further described below in conjunction with specific embodiments and accompanying drawings. More details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0048] Figure 6 FIG. 1 shows a schematic diagram of a nut assembly 1 according to a preferred embodiment of the present invention being assembled into an assembly hole 50. Figure 6 As shown, the nut assembly 1 mainly includes a nut 10, a bracket 20, and an insert 30. The bracket 20 of the nut assembly 1 is configured to hold the nut 10 and is adapted to be installed in the assembly hole 50 of the assembly structure. The insert 30 of the nut assembly 1 is attached to the bracket 20 to retain the bracket 20 in the assembly hole 50. In this document, the assembly structure can be any structure or component that needs to be fastened and assembled using the nut assembly 1 and bolts. In a preferred embodiment, the assembly structure is an assembly structure for closed areas of an aircraft, such as wing movable surfaces, maintenance access covers, etc., particularly blind areas with narrow installation space.

[0049] Figure 1 and Figure 2The nut bracket assembly is shown in front and side views. The bracket 20 mainly comprises a main body 21 adapted to fit in the assembly hole 50 of the assembly structure and a guide 28 extending from the main body 21.

[0050] like Figure 1 As shown, a through hole 23 is formed in the middle of the main body 21 of the bracket 20, and the through hole 23 is used to insert a bolt (not shown) connected to the nut bracket assembly. Figure 2 As shown, the bracket 20 has a first side surface 211 and a second side surface 212 opposite to the first side surface 211 . The first side surface 211 and the second side surface 212 are arranged in parallel. The through hole 23 extends from the first side surface 211 to the second side surface 212 .

[0051] The first side surface 211 is provided with a nut holding portion 22 for detachably or non-detachably holding the nut 10 on the bracket 20. In a preferred embodiment, as shown in FIG. Figure 1 As shown, the nut retaining portion 22 is a slot formed by folding a semicircular protrusion 26 on a first side surface. Correspondingly, the nut 10 fitted to the bracket 20 comprises a nut body 11 and a flange 12 extending outwardly around the nut body 11 at one end thereof. The flange 12 can be inserted into the slot in a straight line.

[0052] In other alternative embodiments, the slot may be directly recessed on the bracket 20. In other alternative embodiments, the nut 20 may be snap-fitted into the nut retaining portion 22 on the bracket 20 by means of rotational snap-fitting.

[0053] The bracket 20 is preferably also provided with a limiter, which acts as a limit stop for the nut 10 when the flange 12 of the nut 10 is inserted therein, ensuring that the through hole 23 in the bracket 20 is aligned with the screw hole of the nut 10. Figure 1 As shown, in a preferred embodiment, the limiting member can be two protrusions 25 protruding from the first side surface 211 of the bracket 20, and the spacing distance between the protrusions 25 corresponds to the width of the corresponding position of the flange 12 of the nut 10. After the nut 10 is inserted into the nut retaining portion 22, the two protrusions 25 abut against the side of the flange 12 to prevent the lateral movement of the nut 10, ensuring that the through hole is aligned with the screw hole.

[0054] In other alternative embodiments, the nut 10 and the bracket 20 may also be constructed as an integral piece, and the through hole 23 of the bracket 20 and the screw hole of the nut 10 are continuous.

[0055] from Figure 1As can be seen from the top view, in a preferred embodiment, the outer perimeter of the first side 211 of the bracket 20 includes parallel straight line segments on two opposing sides and arc segments of equal length at two opposing ends. The slots serving as the nut retaining portion 22 are arranged along the straight line segments. Near the two arc segments, the bracket 20 also includes two attachment holes, generally having a rectangular shape. These two attachment holes 24 extend from the first side 211 to the second side 212. These two attachment holes 24 are used to attach the plug 30 of the nut assembly 1.

[0056] Furthermore, a guide member 28 is provided on the second side surface 212 of the bracket 20. The guide member 28 extends substantially perpendicularly outward from the second side surface 212. Preferably, the guide member 28 is configured as a hollow cylinder. The guide member 28 is used to guide and position the insert 30 so that the front end of the insert 30 is attached to the attachment hole 24 of the bracket 20. To this end, the shape of the outer surface of the guide member 28 matches the shape of at least a portion of the inner surface of the insert 30.

[0057] In some alternative embodiments, the guide member 28 may be integrally formed with the bracket 20, or may be separately formed and subsequently fixed to the second side surface 212 of the bracket 20. In other alternative embodiments, the guide member 28 may not be a complete cylinder, but an extension rod with an arcuate cross-section, whose outer surface matches the shape of at least a portion of the inner surface of the insert 30, which can also serve the purpose of guiding and positioning.

[0058] Figure 3 and Figure 4 1 shows a top view and a side view of the insert 30 of the nut assembly 1. Figure 4 As shown, the insert 30 has a first portion 31 and a second portion 32 , the two portions 31 , 32 being continuous.

[0059] In a preferred embodiment, the first portion 31 of the insert 30 is cylindrical and preferably sized to fit over the cylindrical guide member 28. Preferably, the inner diameter of the cylindrical shape of the first portion 31 is substantially equal to or slightly greater than the outer diameter of the guide member 28, so that the insert 30 can be accurately guided into position by the guide member 28. Furthermore, the length of the first portion 31 of the insert 30 can be slightly longer than or equal to the length of the guide member 28. When the insert 30 is inserted into the assembly hole 50, the inner surface of the first portion 31 of the insert 30 preferably contacts the outer surface of the guide member 28.

[0060] On the other hand, Figure 4 As shown, the second portion 32 of the insert 30 gradually expands outward from the end connected to the first portion 31 and preferably has a truncated circular shape. The guide member 28 does not extend into the second portion 32.

[0061] The first portion 31 has an attachment portion that can be inserted into the attachment hole 24 of the bracket 20. Preferably, the attachment portion is two tabs 33 protruding from the end of the first portion 31. Preferably, the tabs 33 are arranged diametrically opposite each other on the circular end of the first portion 31. The tabs 33 are integrally extended from the first portion 31. After the tabs 33 are inserted into the attachment holes, the tabs 33 can be bent.

[0062] Figure 5 The nut support assembly 1 according to the preferred embodiment of the present invention is shown to be assembled to the assembly hole 50. Figure 5 As shown, the assembly hole 50 is provided in two attached plate-like components, such as the movable surface of an aircraft wing. The assembly hole 50 is countersunk in both the upper and lower directions. The main portion 21 of the bracket 20 is embedded in the upper countersunk hole with a matching shape, and the second portion 32 of the plug 30 is embedded in the lower countersunk hole with a matching shape. By virtue of the shape matching with the countersunk holes, the nut assembly 1 is retained in the assembly hole 50. It should be understood that in other alternative embodiments, the countersunk holes may also have other shapes, for example, the two countersunk holes of the assembly hole 50 may include one cylindrical countersunk hole and one frustoconical countersunk hole, or may include two frustoconical countersunk holes.

[0063] The installation process of the nut assembly 1 according to the present invention is as follows.

[0064] First, the corresponding assembly hole 50 is opened in the assembly structure. By inserting the flange 12 of the nut 10 along the slot, the flange 12 of the nut 10 is moved to the position as shown in FIG. Figure 1 The nut 10 is positioned between the two protrusions 25 shown, thereby installing the nut 10 on the bracket 20 through the nut retaining portion 22. The guide 28 of the bracket 20 is inserted into the assembly hole 50 so that the shape of the main body 21 of the bracket 20 fits into the countersunk hole on one side of the assembly hole 50. Subsequently, the plug-in 30 is inserted from the other side of the assembly hole 50, and the guide 28 guides the first part 31 of the plug-in 30 so that the attachment portion of the plug-in 30 is inserted into the attachment hole of the bracket 20 and protrudes from the attachment hole. Next, the protrusion 33 serving as the attachment portion is folded to both sides, for example, at a 90-degree angle, so that it is snapped onto the first surface of the bracket 20. At that time, the second part 32 of the plug-in 30 is as shown Figure 6 The countersunk hole shape below the shown assembly hole 50 is matched. Like this, the installation of nut assembly 1 is just completed. Finally, screw is passed through the assembly hole 50 and is screwed into the screw hole of nut assembly 1.

[0065] According to the nut assembly 1 of the present invention, there is no need to use riveting fasteners or adhesives, thereby providing a nut assembly 1 with more flexible usage scenarios and higher installation efficiency.

[0066] The nut assembly 1 according to the present invention is particularly suitable for being installed in an assembly hole of an assembly structure of an aircraft, and will not damage the composite materials constituting the assembly structure of the aircraft, thereby ensuring the structural strength of the aircraft structure.

[0067] Although the utility model is disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modifications, equivalent variations, and modifications made to the above embodiments that do not depart from the technical solution of the present invention and are based on the technical essence of the present invention shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. A nut assembly capable of being mounted in a mounting hole, the nut assembly comprising a nut and a bracket supporting the nut; It is characterized by ； The bracket has a main body, the main body has a first side surface and a second side surface opposite to the first side surface, the main body forms a through hole and attachment holes located on both sides of the through hole, and the nut is connected to the first side surface of the bracket; The nut assembly further comprises an insert capable of being attached to the bracket, the insert having a first portion and a second portion, wherein an end portion of the first portion is provided with an attachment portion inserted into the attachment hole of the bracket, and the second portion is shape-fitted to one end of the assembly hole.

2. The nut assembly according to claim 1, wherein: The bracket has: a nut holding portion, the nut holding portion being disposed on the first side surface; and A guide extends from the second side surface, the guide being configured to guide the insert.

3. The nut assembly according to claim 2, wherein: The guide and the first portion of the insert both have a cylindrical shape and are coaxially arranged, and the guide is located inside the insert.

4. The nut assembly according to claim 1, wherein: The attachment hole passes through from the first side surface to the second side surface; The attachment portion of the insert is two or more tabs protruding from the end of the first portion, the tabs being arranged at equal intervals around the end of the first portion; The tab passes through and protrudes from the attachment hole, and the tab is bendable.

5. The nut assembly according to claim 2, wherein: The nut comprises a nut body and a flange located at one end of the nut body and extending outward around the nut body. The nut retaining portion of the bracket is a slot suitable for inserting into the flange.

6. The nut assembly according to claim 1, wherein: The bracket is further provided with a limiting member, and the limiting member is configured to limit the position of the nut on the bracket.

7. The nut assembly according to claim 6, wherein: The limiting member includes two protrusions protruding from the first side surface of the bracket. After the nut is fitted onto the bracket, the two protrusions abut against the side of the flange to prevent the nut from moving.

8. A nut mounting structure, characterized in that: include: The nut assembly according to any one of claims 1 to 7; An assembly hole is provided on the assembly structure, wherein both ends of the assembly hole are countersunk holes, and the countersunk holes are respectively matched with the main body of the bracket and the second part of the plug-in.

9. The nut mounting structure according to claim 8, wherein: The second portion of the plug-in unit is formed in a truncated cone shape, and one counterbore of the assembly hole is a truncated cone-shaped counterbore.

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