Lock hook connector and lock hook assembly

Abstract

The utility model relates to the field of airplane body structures, in particular to a lock hook connector and a lock hook assembly. The lock hook connector comprises a connector body, the connector body comprises a mounting part and a connecting part, the mounting part is mounted on a doorframe sill beam, the connecting part is mounted on one side of the mounting part and used for being connected with an airplane cabin door, and the connector body further comprises an upper conduction part, a lower conduction part and a middle conduction part connected between the upper conduction part and the lower conduction part. When the connecting part of the lock hook connector is subjected to a vertical load and a circumferential load, the connecting part can transmit the vertical load and the circumferential load to the wall plate, the floor beam and the fuselage frame through the mounting part, the middle conduction part, the upper conduction part and the lower conduction part, that is, the lock hook connector can disperse the load borne by the lock hook connector, and the use reliability of the lock hook connector is improved. According to the lock hook assembly, the lock hook connector is arranged, so that loads borne by all components of the lock hook assembly can be transmitted mutually, the service life of the lock hook assembly is prolonged, the structure is simple, and the production and manufacturing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of aircraft airframe structure, and in particular to a locking hook connector and locking hook assembly. Background Technology

[0002] To facilitate cargo loading and unloading, cargo aircraft are designed with flexibly opening and closing cargo doors. These doors are movably mounted to the top of the fuselage entrance / exit frame via hinges and locking mechanisms. The door frame, as a reinforcing structure for the fuselage entrance / exit, maintains the structural strength and rigidity of the fuselage while ensuring the doors can open and close properly. A row of locking hooks at the bottom of the door frame is designed to lock the doors in place and to bear the loads during door opening / closing and under pressure, transferring these loads to the fuselage panels, frames, and floor beams.

[0003] There are two main types of lock hook connectors in the existing technology. One type is the pull-type lock hook connector structure. The characteristic of this mechanism is that it does not require drilling holes in the web of the aircraft door frame sill beam to install the lock hook connector. The pull-type lock hook connector includes a lug connector and a load-sharing connector. The lug connector on the outside of the sill beam connects to the cabin door, and the load-sharing connector on the inside of the sill beam connects to the wall panel, frame, and floor beam. The lug connector and the load-sharing connector are connected by pull bolts. The other type is an integrated lock hook connector structure with a "mountain" shaped cross section. It connects the lug of the cabin door from the outside of the door frame sill beam and extends from the bottom of the sill beam to the inside of the sill beam, forming a "mountain" shaped cross section. The lug is connected to the frame, wall panel, and floor beam through connectors.

[0004] However, the tie-bolt type lock hook joint bears the entire door load, which poses a significant risk of structural fatigue and fracture. The "mountain"-shaped integrated lock hook joint is structurally complex and inconvenient to design and manufacture. Therefore, there is an urgent need to propose a lock hook joint that solves these problems. Utility Model Content

[0005] One objective of this invention is to provide a locking hook connector to solve the problems of easy breakage and complex structure of existing locking hook connectors.

[0006] Another objective of this invention is to provide a locking hook assembly to solve the problems of easy damage and complex structure of existing locking hook assemblies.

[0007] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0008] A locking hook connector includes a connector body, which includes a mounting portion and a connecting portion. The mounting portion is mounted on a door frame sill beam, and the connecting portion is mounted on one side of the mounting portion for connection to an aircraft cabin door. The connector body also includes an upper conductive portion, a lower conductive portion, and a middle conductive portion connecting the upper conductive portion and the lower conductive portion. The upper conductive portion, the lower conductive portion, and the middle conductive portion are all mounted on the other side of the mounting portion. The upper conductive portion is used to connect to a floor beam, the middle conductive portion is used to connect to a fuselage frame, and the lower conductive portion is used to connect to a wall panel.

[0009] Optionally, the upper conductive part, the lower conductive part, and the middle conductive part are all plate-shaped, the upper conductive part is perpendicular to the middle conductive part, and the middle conductive part is parallel to the fuselage frame.

[0010] Optionally, along the length direction of the locking hook joint, the length of the upper conductive part is less than the length of the lower conductive part, and the length of the middle conductive part is equal to the length of the lower conductive part.

[0011] Optionally, the locking hook connector further includes a transition connector, which includes an upper transition portion and a lower transition portion connected together. The upper transition portion is installed between the upper conductive portion and the bottom surface of the floor beam, and the lower transition portion is installed between the middle conductive portion and the body frame.

[0012] Optionally, the lower transition portion is provided with a plurality of connecting protrusions on its lower side, and the connecting protrusions can be connected to the wall panel.

[0013] Optionally, the lower transition portion is plate-shaped and has a horizontal plate and a vertical plate, the horizontal plate being connected to the upper transition portion, and the vertical plate being fitted and installed in the middle transmission portion.

[0014] Optionally, the upper transition portion is frame-shaped and its frame has a lower abutment surface and a side abutment surface. The lower abutment surface is fitted onto the upper conduction portion, and the side abutment surface abuts against the door frame sill beam.

[0015] Optionally, the vertical plate of the floor beam is fitted and installed on one side of the upper transition section.

[0016] A locking hook assembly includes the locking hook connector and a door frame sill beam. The door frame sill beam has a mounting hole. The mounting part is installed on one side of the door frame sill beam so that the connecting part passes through the mounting hole, or the upper conductive part, the lower conductive part, and the middle conductive part pass through the mounting hole.

[0017] Optionally, the mounting part has a flange protruding along its circumference, and the flange abuts against the door frame sill beam.

[0018] Optionally, the door frame sill beam has a U-shaped cross-section, with the lower side of the top plate of the U-shaped door frame sill beam located above the lock hook joint, and the bottom plate of the U-shaped door frame sill beam being fitted between the lower transmission part and the wall panel.

[0019] The beneficial effects of this utility model are:

[0020] This utility model proposes a locking hook connector. When the connecting part of the locking hook connector is subjected to a vertical load along the length of the locking hook connector, and when the connecting part of the locking hook connector is subjected to a circumferential load, the connecting part can transfer the vertical and circumferential loads to the door frame sill beam through the mounting part, to the fuselage frame through the middle transmission part, to the floor beam through the upper transmission part, and to the wall panel through the lower transmission part. Furthermore, the loads between the mounting part, upper transmission part, lower transmission part, and middle transmission part can also be mutually transferred. Simultaneously, any one of the floor beam, wall panel, fuselage frame, and door frame sill beam can also transfer its own load to other components through the locking hook connector. In other words, the locking hook connector can disperse its own load, thus reducing the risk of breakage, extending its service life, and improving its reliability. In addition, the structure formed by the mounting part, upper transmission part, lower transmission part, and the middle transmission part connecting the upper and lower transmission parts is simple and reliable, improving manufacturing efficiency.

[0021] The present invention proposes a locking hook assembly, which, by setting a locking hook joint, enables the load on each component to be transferred to each other, thereby dispersing the load, extending the service life of the locking hook assembly, and improving its reliability; moreover, the structure of the locking hook joint is relatively simple, which improves the manufacturing efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the locking hook assembly provided in this embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the connector body provided in this embodiment of the utility model;

[0025] Figure 3 This is an exploded view of the locking hook assembly provided in this embodiment of the utility model;

[0026] Figure 4 This is a schematic diagram of the transition connector provided in an embodiment of the present utility model.

[0027] In the picture:

[0028] 1. Connector body; 11. Connecting part; 12. Mounting part; 13. Upper conductive part; 14. Middle conductive part; 15. Lower conductive part;

[0029] 2. Transition connector; 21. Upper transition part; 211. Upper abutment surface; 212. Lower abutment surface; 213. Reinforcing rib; 214. Vertical transition plate; 22. Lower transition part; 221. Horizontal plate; 222. Vertical plate; 223. Connecting protrusion;

[0030] 3. Door frame sill beam; 31. Mounting hole; 32. Top plate; 33. Bottom plate; 34. Reinforcing beam;

[0031] 100. Floor beam; 200. Wall panel. Detailed Implementation

[0032] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or it can be located in between the component.

[0038] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] This embodiment proposes a lock hook connector and lock hook assembly to solve the problems of easy breakage and complex structure of lock hook connectors in the prior art, thereby improving the reliability of lock hook connectors and simplifying their structure.

[0040] like Figure 1 As shown, the locking hook assembly includes a locking hook connector and a door frame sill beam 3, with the locking hook connector installed on the door frame sill beam 3. Cargo aircraft are generally equipped with cargo doors for easy cargo access. The cargo door is installed at the top of the door frame, and the bottom of the door frame has a door frame sill beam 3. A locking hook connector is installed on the door frame sill beam 3, and the locking hook connector is generally equipped with a locking hook shaft. The locking hook shaft can cooperate with a specific structure on the cargo door to lock the cargo door. The working environment of aircraft cargo doors is relatively harsh, and the locking hook connector will be subjected to loads in different directions when the cargo door is opened and closed or when it is subjected to pressure.

[0041] like Figure 1 and Figure 2As shown, the locking hook connector includes a connector body 1 and a transition connector 2. The connector body 1 includes a mounting part 12 and a connecting part 11. The mounting part 12 is mounted on the door frame sill beam 3, and the connecting part 11 is connected to one side of the mounting part 12 for connection with the aircraft door. The connector body 1 also includes an upper transmission part 13, a lower transmission part 15, and a middle transmission part 14 connected between the upper transmission part 13 and the lower transmission part 15. The upper transmission part 13, the lower transmission part 15, and the middle transmission part 14 are all connected to the other side of the mounting part 12. The upper transmission part 13 is used to connect with the floor beam 100, the middle transmission part 14 is used to connect with the fuselage frame, and the lower transmission part 15 is used to connect with the wall panel 200.

[0042] Understandably, the connecting part 11 is generally equipped with a locking hook shaft to connect with the aircraft door. When the aircraft door is opened or closed, or when the aircraft door is subjected to the pressure difference between the inside and outside of the aircraft, the door may experience impact, dragging, or pushing of the locking hook joint. At this time, the connecting part 11 will be subjected to force along the length direction of the locking hook joint. Figure 2 and Figure 3 The direction indicated by the middle arrow is the vertical load along the length of the hook joint. Furthermore, during aircraft flight, the cabin door may experience unpredictable twisting and warping due to airflow and other factors. In this case, the connecting part 11 will be subjected to a circumferential load along its own circumference. In this embodiment, the connecting part 11 is connected to one side of the mounting part 12. The other side of the mounting part 12 is provided with an upper conducting part 13, a lower conducting part 15, and a middle conducting part 14 connecting the upper conducting part 13 and the lower conducting part 15. When the connecting part 11 is subjected to vertical and circumferential loads, the mounting part 12 can transmit the vertical and circumferential loads to the door frame sill beam 3, the middle conducting part 14 can transmit the vertical and circumferential loads to the fuselage frame, and the upper conducting part 13 can transmit the vertical and circumferential loads to the floor beam. The mounting section 100, upper transmission section 13, lower transmission section 15, and middle transmission section 14 can also transmit loads to the wall panel 200. Therefore, the hook joint can distribute the load it receives, making it less prone to breakage, extending its service life, and improving its reliability. Simultaneously, any one of the floor beam 100, wall panel 200, fuselage frame, and door frame sill beam 3 can also transmit its load to other components through the hook joint. Furthermore, the structure formed by the mounting section 12, upper transmission section 13, lower transmission section 15, and the middle transmission section 14 connecting the upper and lower transmission sections 13 and 15 has a simple shape, making it easy to process and improving manufacturing efficiency.

[0043] like Figure 3 As shown, optionally, the door frame sill beam 3 has a mounting hole 31, and the mounting part 12 is installed on one side of the door frame sill beam 3 so that the connecting part 11 passes through the mounting hole 31, or the upper conductive part 13, the lower conductive part 15 and the middle conductive part 14 pass through the mounting hole 31.

[0044] Understandably, the mounting part 12 can be installed on the outside or inside of the door frame sill beam 3. When the mounting part 12 is installed on the inside of the door frame sill beam 3, the connecting part 11 extends out of the mounting hole 31 from the outside of the door frame sill beam 3 to connect the aircraft door. When the mounting part 12 is installed on the outside of the door frame sill beam 3, the upper transmission part 13, the lower transmission part 15 and the middle transmission part 14 extend out of the mounting hole 31 from the inside of the door frame sill beam 3 to connect the floor beam 100, the fuselage frame and the wall panel 200 and other structures.

[0045] For example, multiple mounting holes 31 are provided, and a reinforcing beam 34 is provided between adjacent mounting holes 31 for the door frame sill beam 3. The reinforcing beam 34 is used to improve the structural strength of the door frame sill beam 3 and to divide the area where different lock hook joints are located.

[0046] Optionally, the mounting part 12 has a flange protruding along its circumference, which is used to abut against the door frame sill beam 3. This arrangement can improve the connection strength between the connector body 1 and the door frame sill beam 3 and prevent the connector body 1 from detaching from the door frame sill beam 3.

[0047] like Figure 2 As shown, optionally, along the length direction of the locking hook joint, the length of the upper conductive part 13 is less than the length of the lower conductive part 15, and the length of the middle conductive part 14 is equal to the length of the lower conductive part 15. This arrangement facilitates the connection between the middle conductive part 14 and the fuselage frame, ensures the connection strength between the lower conductive part 15 and the wall panel 200, saves manufacturing materials for the locking hook joint, and improves the structural rationality of the locking hook joint.

[0048] like Figure 4 As shown, optionally, the locking hook connector also includes a transition connector 2, which includes an upper transition part 21 and a lower transition part 22 connected to each other. The upper transition part 21 is installed between the upper transmission part 13 and the bottom surface of the floor beam 100, and the lower transition part 22 is installed between the middle transmission part 14 and the fuselage frame.

[0049] Understandably, the upper transition portion 21 connects the upper conduction portion 13 and the bottom surface of the floor beam 100, realizing load transfer between the connector body 1 and the floor beam 100. Simultaneously, the lower transition portion 22 is installed between the middle conduction portion 14 and the fuselage frame, realizing load transfer between the connector body 1 and the fuselage frame. Furthermore, the floor beam 100 can also transfer load to the fuselage frame via the transition connector 2. In other words, the transition connector 2 serves to transfer load, thereby improving the service life and reliability of the locking hook connector. For example, the transition connector 2 is Z-shaped. This design allows the transition connector 2 to adapt to the special structure where the length of the upper conduction portion 13 of the connector body 1 is less than the length of the lower conduction portion 15, improving the structural rationality of the locking hook connector.

[0050] Optionally, the vertical plate of the floor beam 100 is fitted onto one side of the upper transition section 21. This arrangement ensures a stable connection between the floor beam 100 and the transition connector 2, improving the structural stability and load-bearing capacity of the locking hook joint 1.

[0051] For example, the upper transition portion 21 has a vertical transition plate 214, on which the vertical plate of the floor beam 100 is fitted and installed. This arrangement can further improve the connection stability between the floor beam 100 and the transition connector 2, and improve the reliability of the locking hook joint 1.

[0052] Optionally, the lower transition portion 22 is provided with a plurality of connecting protrusions 223 on its lower side, which can connect with the wall panel 200. This arrangement enables the transition connector 2 to transfer load with the wall panel 200. In addition, the connecting protrusions 223 enable the lower transition portion 22 to better adapt to the uneven structural features of the wall panel 200, achieve a stable connection with the wall panel 200, and improve the structural strength of the locking hook assembly.

[0053] In this embodiment, the wall panel 200 is stepped. Along the length of the lock hook joint, the wall panel 200 is thicker at the connection between the joint body 1 and the door frame sill beam 3, while the thickness of the remaining areas is thinner. The connecting protrusion 223 can make up for the height difference of the wall panel 200 and improve the structural rationality of the lock hook assembly.

[0054] To improve the connection stability of the transition connector 2, the upper transition portion 21 may optionally be frame-shaped with a lower abutment surface 212 and a side abutment surface 211 on its frame. The lower abutment surface 212 is fitted to the upper transmission portion 13, and the side abutment surface 211 abuts against the door frame sill beam 3. This arrangement makes the connection between the upper transition portion 21 and the floor beam 100 and the upper transmission portion 13 a surface connection, improving the connection stability and enhancing the reliability of the lock hook assembly.

[0055] To improve the structural strength of the upper transition portion 21, a reinforcing rib 213 may be provided between the upper and lower frames of the upper transition portion 21.

[0056] Optionally, the lower transition portion 22 is plate-shaped and has a horizontal plate 221 and a vertical plate 222. The horizontal plate 221 is connected to the upper transition portion 21, and the vertical plate 222 is fitted to the middle transmission portion 14. Understandably, the torque on the upper transition portion 21 can be transmitted to the vertical plate 222 through the horizontal plate 221 in a surface-to-surface mating manner, thereby increasing the torque bearing capacity of the lower transition portion 22. At the same time, the fitted connection between the vertical plate 222 and the middle transmission portion 14 increases the connection area between the two, improves the connection strength between the vertical plate 222 and the middle transmission portion 14, and thus improves the reliability of the locking hook assembly.

[0057] To further enhance the structural strength of the lower transition section 22, optionally, a structural reinforcement member is inclinedly connected between the horizontal plate 221 and the vertical plate 222 of the lower transition section 22.

[0058] like Figure 2 As shown, to further enhance the connection strength, the upper conductive part 13, the lower conductive part 15, and the middle conductive part 14 can optionally be plate-shaped, with the upper conductive part 13 perpendicular to the middle conductive part 14 and the middle conductive part 14 parallel to the fuselage frame. This arrangement can further expand the connection area between components, increase the connection strength, and at the same time, the plate-shaped arrangement saves raw materials, reduces the weight of the joint body 1, and the plate-shaped components have a more regular shape, making them easier to manufacture and improving production efficiency.

[0059] In this embodiment, the lower conductive part 15 is adapted to the shape of the fuselage panel. This arrangement ensures that the lower conductive part 15 fits tightly against the panel, avoiding unevenness, thereby preventing stress concentration and improving the reliability of the locking hook joint 1.

[0060] Optionally, the door frame sill beam 3 has a U-shaped cross-section. The lower side of the top plate 32 of the U-shaped door frame sill beam 3 is located above the lock hook joint, and the bottom plate 33 of the U-shaped door frame sill beam 3 is fitted between the lower transmission part 15 and the wall panel 200. This arrangement increases the connection area between the door frame sill beam 3 and the lock hook joint and the wall panel 200, thereby improving the structural strength of the lock hook assembly and enhancing its reliability.

[0061] The assembly process of the locking hook assembly in this embodiment is as follows:

[0062] The mounting part 12 of the connector body 1 is installed on the door frame sill beam 3, so that the connecting part 11 extends from the mounting hole 31 to the outside of the door frame sill beam 3, the flange abuts against the door frame sill beam 3, and the lower transmission part 15 abuts against the bottom plate 33 of the door frame sill beam 3.

[0063] The lower abutting surface 212 of the upper transition part 21 in the transition connector 2 is abutted and installed on the upper side of the upper transmission part 13, and one side of the lower transition part 22 is fitted and installed on the middle transmission part 14, while the other side is connected to the fuselage frame.

[0064] The vertical plate of the floor beam 100 is attached to the vertical transition plate 214 of the upper transition part 21, the bottom plate 33 of the door frame sill beam 3 is installed on the upper side of the wall panel 200, and the connecting protrusion 223 of the lower transition part 22 is connected to the wall panel 200 to complete the assembly of the lock hook assembly.

[0065] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A hook joint comprising a joint body (1) comprising a mounting portion (12) mounted to a door frame sill beam (3) and a connecting portion (11) mounted to one side of the mounting portion (12) for connection with an aircraft door, characterised in that, The joint body (1) further includes an upper conduction part (13), a lower conduction part (15), and a middle conduction part (14) connected between the upper conduction part (13) and the lower conduction part (15). The upper conduction part (13), the lower conduction part (15), and the middle conduction part (14) are all installed on the other side of the installation part (12). The upper conduction part (13) is used to connect with the floor beam (100), the middle conduction part (14) is used to connect with the fuselage frame, and the lower conduction part (15) is used to connect with the skin panel (200).

2. The hook-and-loop fastener of claim 1, wherein The upper conduction part (13), the lower conduction part (15), and the middle conduction part (14) are all plate-shaped. The upper conduction part (13) is perpendicular to the middle conduction part (14), and the middle conduction part (14) is parallel to the fuselage frame.

3. The hook-and-loop fastener of claim 1, wherein Along the length direction of the hook joint, the length of the upper conduction part (13) is less than the length of the lower conduction part (15), and the length of the middle conduction part (14) is equal to the length of the lower conduction part (15).

4. The hook-and-loop fastener of claim 1, wherein The hook joint further includes a transition connecting part (2). The transition connecting part (2) includes an upper transition part (21) and a lower transition part (22) connected to each other. The upper transition part (21) is installed between the upper conduction part (13) and the bottom surface of the floor beam (100), and the lower transition part (22) is installed between the middle conduction part (14) and the fuselage frame.

5. The hook-and-loop fastener of claim 4, wherein A plurality of connecting protrusions (223) are provided on the lower side of the lower transition part (22), and the connecting protrusions (223) can be connected with the skin panel (200).

6. The hook-and-loop fastener of claim 4, wherein The lower transition part (22) is plate-shaped and has a horizontal plate (221) and a vertical plate (222). The horizontal plate (221) is connected to the upper transition part (21), and the vertical plate (222) is fitted and installed on the middle conduction part (14).

7. The hook-and-loop fastener of claim 4, wherein The upper transition part (z1) is frame-shaped and its frame has a lower abutting surface (212) and a side abutting surface (211). The lower abutting surface (212) is fitted and installed on the upper conduction part (13), and the side abutting surface (211) abuts against the door sill beam (3).

8. The hook-and-loop fastener of claim 4, wherein The vertical plate of the floor beam (100) is fitted and installed on one side of the upper transition part (21).

9. A hook and loop assembly, characterized in that, The hook assembly includes the hook joint according to any one of claims 1-8, and further includes a door sill beam (3). The door sill beam (3) is provided with an installation hole (31). The installation part (12) is installed on one side of the door sill beam (3), and the connecting part (11) passes through the installation hole (31), or the upper conduction part (13), the lower conduction part (15), and the middle conduction part (14) pass through the installation hole (31).

10. The hook assembly of claim 9, wherein, The installation part (12) is provided with a flange protruding along its circumferential direction, and the flange abuts against the door sill beam (3).

11. The hook assembly of claim 9, wherein, The cross-section of the door sill beam (3) is in a C-shaped. The lower side of the top plate (32) of the C-shaped door sill beam (3) is located above the hook joint, and the bottom plate (33) of the C-shaped door sill beam (3) is fitted and installed between the lower conduction part (15) and the skin panel (200).

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