End reinforcement of a hatch door load bearing structure

Abstract

The application discloses an end reinforcing device for a cabin door load-bearing structure, which is simple and compact in structure, small in space occupation and convenient to install and maintain. The end reinforcing device (100) is arranged in multiple groups at the lower end of the load-bearing structure of a cabin door (200), is fixed to the lower end frame structure (201) and the cabin door skin (202) of the cabin door (200), and is assembled in the inner side of two adjacent load-bearing beam structures (203) for transmitting the load of the main structure of the cabin door (200) through a small gap fitting mode. One example of the end reinforcing device (100) for the cabin door load-bearing structure comprises a back plate (101) fixedly connected with the lower end frame structure (201) of the cabin door (200), a bottom plate (102) fixedly connected with the cabin door skin (202) of the cabin door (200), and a side plate (103) closely arranged in the inner side of the load-bearing beam structure (203) of the cabin door (200).

Description

Technical Field

[0001] This utility model relates to an end reinforcement device for a cargo door load-bearing structure, and more specifically, to an end reinforcement device for a cargo door load-bearing structure for reinforcing the end of the load-bearing structure of a cargo door in an aircraft. Background Technology

[0002] In civil aircraft, cargo doors or main cargo doors are usually installed on the fuselage for the entry and exit of cargo / containers.

[0003] Cargo doors of passenger-carrying civil aircraft are generally located on the lower side of the fuselage and are mostly outward-opening dangerous doors. During flight, they bear the pressurization load and safety load of the fuselage and cabin. They are connected to the fuselage using piano key hinges and other means, and seals are installed in the door frame area to ensure the overall airtightness of the door.

[0004] In addition, the main cargo door of cargo-type civil aircraft is usually opened separately on the upper side of the fuselage for loading large containers. Due to the large size of the main cargo door, there is a large concentrated load at the end of the load-bearing structure, which causes mismatch deformation of the structure in the corresponding area (e.g., bending deformation of the lugs, door step difference, and reduced airtightness). Therefore, it is necessary to ensure the strength and reliability of the structure by strengthening the end of the load-bearing structure of the cargo door.

[0005] The existing technology for reinforcing the load-bearing structure of cargo doors mainly focuses on the door structure itself, especially the overall reinforcement design of the ends, which greatly increases the structural weight. This is not suitable for use on large-sized cargo doors. At the same time, the structure is relatively complex, occupies a lot of space, and is not easy to install and maintain.

[0006] Therefore, it is desirable to design an end reinforcement device for the hatch load-bearing structure that is simple and compact in structure, occupies little space, and is easy to install and maintain. Utility Model Content

[0007] This utility model is made to solve the above-mentioned problems in the prior art. Its purpose is to provide an end reinforcement device for the load-bearing structure of a hatch, which has a simple and compact structure, occupies little space, and is convenient for installation and maintenance.

[0008] To achieve the above objectives, this utility model provides an end reinforcement device for a hatch load-bearing structure. Multiple sets of the end reinforcement device are locally arranged at the lower end of the hatch load-bearing structure, fixed to the lower end frame structure and hatch skin of the hatch, and assembled on the inner side of two adjacent load-bearing beam structures used to transfer the load of the main hatch structure through a small clearance fit.

[0009] Based on the above-described configuration, compared with existing reinforcement devices, the end reinforcement device of the hatch load-bearing structure of this utility model is only partially arranged at the lower end of the hatch. By combining it with the structure of the lower end of the hatch itself, it can better transfer the load and further reliably enhance the strength and rigidity of the hatch. The structure is simple and compact, occupies little space, and is convenient for installation and maintenance.

[0010] In addition, the end reinforcement device of the door load-bearing structure (more specifically, the side plate) and the load-bearing beam structure of the door are fitted with a small gap. When the circumferential load of the whole machine is transmitted at the load-bearing beam structure, the small gap between the two can more effectively prevent the circumferential load of the whole machine from being directly transmitted from the load-bearing beam structure to the end reinforcement device of the door load-bearing structure compared with the connection through fasteners, thereby preventing the end reinforcement device of the door load-bearing structure from bearing the large circumferential load of the door.

[0011] As an example of the end reinforcement device for the door load-bearing structure, the end reinforcement device for the door load-bearing structure includes, for example: a back plate, which is fixedly connected to the lower end frame structure of the door; a bottom plate, which is fixedly connected to the door skin of the door; and a side plate, which is disposed close to the inner side of the load-bearing beam structure of the door.

[0012] As described above, since the back plate of the end reinforcement device of the hatch load-bearing structure is fixedly connected to the lower frame structure of the hatch, the overall stiffness of the hatch is continuous, and the lower frame structure is also strengthened. Furthermore, since the bottom plate of the end reinforcement device is fixedly connected to the hatch skin, the end reinforcement device and the hatch skin share the load. Moreover, since the side plate of the end reinforcement device is located close to the inner side of the load-bearing beam structure of the hatch, it can resist lateral bending deformation when the load-bearing beam structure is eccentrically loaded, thus enhancing the deformation resistance and load-bearing capacity of the local area of ​​the load-bearing beam structure.

[0013] Preferably, when the hatch support structure end reinforcement device is installed at the lower end of the hatch, it is assembled with the hatch locking mechanism. The back plate of the hatch support structure end reinforcement device is provided with a first opening and the side plate is provided with through holes for assembly with the hatch latch mechanism and the hatch locking rod mechanism of the hatch locking mechanism when it is installed on the hatch, making the overall structure simpler and more compact.

[0014] Furthermore, the hatch latch mechanism and the hatch locking rod mechanism of the hatch locking mechanism can move or rotate in the first opening and through hole of the end reinforcement device of the hatch load-bearing structure, respectively.

[0015] Preferably, when the end reinforcement device of the hatch load-bearing structure is installed at the lower end of the hatch, it is assembled with the auxiliary load-bearing beam structure at the lower end of the hatch. At this time, the back plate of the end reinforcement device of the door load-bearing structure is provided with a second opening for assembly with the auxiliary load-bearing beam structure of the door.

[0016] Furthermore, the back plate and side plate of the end reinforcement device of the door load-bearing structure can be set with different thicknesses for different load characteristics, thereby effectively reducing the weight of the reinforcement device itself.

[0017] Furthermore, the bottom plate of the end reinforcement device of the door load-bearing structure is provided with longitudinal and transverse reinforcing ribs, which can enhance the lateral stiffness of the overall structure, improve the load-bearing capacity of the structure, and make the door as a whole have a strong resistance to deformation when bearing load.

[0018] Multiple sets of the end reinforcement devices of the hatch load-bearing structure can be arranged at equal intervals at the lower end of the hatch, or they can be arranged more closely in the parts where the load is more likely to concentrate than in the parts where the load is less likely to concentrate. This allows for better selection based on the load distribution. Attached Figure Description

[0019] Figure 1 This is an overall schematic diagram of a hatch equipped with an end reinforcement device for a hatch support structure according to an embodiment of the present invention.

[0020] Figure 2 Is Figure 1 A magnified view of the location A of the hatch shown.

[0021] Figure 3 This is a schematic diagram showing the structure of the end reinforcement device of the door bearing structure according to an embodiment of the present invention. (Symbol Explanation) 100. End reinforcement device for the load-bearing structure of the hatch; 101 Back panel; 102 Base Plate; 103 Side panels; 104 The first opening; 105 Second opening; 106 Through Hole; 107. Reinforcing ribs; 200 hatches; 201. Lower frame structure; 202. Cabin door skin; 203 Load-bearing beam structure; 204 Auxiliary load-bearing beam structure; 300. Door locking mechanism; 301. Cabin door locking mechanism; 302 Cabin door latch mechanism. Detailed Implementation

[0022] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. These embodiments will help those skilled in the art to further understand this utility model, but are not intended to unnecessarily limit the scope of protection of this utility model.

[0023] In this invention, the terms "upper," "lower," "inner," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, component, or part to having a specific orientation, or to be constructed and operated in a specific orientation.

[0024] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0025] Figure 1 A schematic diagram of a hatch 200 with an end reinforcement device 100 of a hatch load-bearing structure according to an embodiment of the present invention is shown. Figure 2 Is Figure 1 A partially enlarged schematic diagram of location A of hatch 200 shown.

[0026] Cargo doors (hereinafter referred to as "doors 200") of civil aircraft are typically located on both sides of the fuselage. Doors 200 can be opened and closed for the entry and exit of cargo / containers. Figure 1 As shown, multiple sets of hatch support structure end reinforcement devices 100 are arranged at the end of the load-bearing structure of the hatch 200, such as the lower end of the load-bearing structure of the hatch 200, to enhance the strength and rigidity of the end of the hatch 200 and improve the overall reliability of the hatch 200.

[0027] In addition, Figure 1 In this case, the end reinforcement devices 100 of the hatch load-bearing structure are arranged in four sets, but the number is not limited to this; there may be two, three, five, or more sets. In addition, the multiple sets of end reinforcement devices 100 of the hatch load-bearing structure may be arranged at equal intervals or in a manner in which the multiple sets of end reinforcement devices 100 of the hatch load-bearing structure are arranged more closely in the parts where the load is more likely to concentrate than in the parts where the load is less likely to concentrate.

[0028] by Figure 1 Taking location A of hatch 200 as an example, Figure 2 As shown, a lower end frame structure 201, a load-bearing beam structure 203 for transmitting the load of the main structure of the hatch 200, and an auxiliary load-bearing beam structure 204 for supporting the load of the auxiliary load-bearing beam structure 203 are provided at the lower end of the hatch 200. In addition, a hatch locking mechanism 300 is also provided at the lower end of the hatch 200. The hatch locking mechanism 300 includes a hatch locking rod mechanism 301 and a hatch latch mechanism 302. The hatch locking mechanism 300 enables the hatch 200 to be safely closed and locked during flight, and enables the hatch 200 to be opened smoothly when needed.

[0029] Furthermore, when the hatch load-bearing structure end reinforcement device 100 is installed at the lower end of the hatch 200, it is assembled with the lower end frame structure 201, the load-bearing beam structure 203, and the auxiliary load-bearing beam structure 204 at the lower end of the hatch 200. By combining the hatch load-bearing structure end reinforcement device 100 with the structure of the lower end of the hatch 200 itself, the load can be transferred better, further reliably enhancing the strength and rigidity of the hatch 200. More specifically, as... Figure 2 As shown, the end reinforcement device 100 of the hatch load-bearing structure is closely arranged with the lower end frame structure 201 and hatch skin 202 at the lower end of the hatch 200, and is arranged between the two load-bearing beam structures 203 and fixed to the lower end frame structure 201 and hatch skin 202.

[0030] In addition, the end reinforcement device 100 of the hatch load-bearing structure is also assembled with the hatch locking rod mechanism 301 and the hatch latch mechanism 302 of the hatch locking mechanism 300 to effectively transfer the hatch load.

[0031] Figure 3 This is a schematic diagram illustrating the structure of the end reinforcement device 100 of the hatch support structure according to an embodiment of the present invention. Figure 3 As shown, the end reinforcement device 100 of the door load-bearing structure includes a back plate 101, a bottom plate 102, and a side plate 103 located on the side.

[0032] like Figure 2 and Figure 3As shown, the back plate 101 of the hatch load-bearing structure end reinforcement device 100 is connected to the lower end frame structure 201 of the hatch 200, for example, by fasteners, ensuring the overall rigidity of the hatch 200 is continuous and reinforcing the lower end frame structure 201. Furthermore, the bottom plate 102 of the hatch load-bearing structure end reinforcement device 100 is connected to the hatch skin 202 of the hatch 200, for example, by fasteners, allowing the hatch load-bearing structure end reinforcement device 100 and the hatch skin 202 to jointly bear the pressure load and shear load of the hatch skin 202. The two side plates 103 on both sides of the hatch load-bearing structure end reinforcement device 100 are respectively set close to the corresponding load-bearing beam structure 203, thereby resisting lateral bending deformation of the load-bearing beam structure 203 under eccentric loading, which helps to enhance the deformation resistance and load-bearing capacity of the local area of ​​the load-bearing beam structure 203. The side plates 103 of the hatch load-bearing structure end reinforcement device 100 and the load-bearing beam structure 203 can be connected by fasteners or left unconnected with a small fitting gap. In this embodiment, the side plate 103 of the end reinforcement device 100 of the door bearing structure is preferably fitted to the bearing beam structure 203 with a small gap. Therefore, when the circumferential load of the entire machine is transmitted at the bearing beam structure 203, the small gap between the two can more effectively prevent the circumferential load of the entire machine from being directly transmitted from the bearing beam structure 203 to the end reinforcement device 100 of the door bearing structure compared to the connection by fasteners. This avoids the end reinforcement device 100 of the door bearing structure from bearing the large circumferential load of the door 200, making the loads of the two independent when subjected to circumferential loads.

[0033] In addition, such as Figure 3 As shown, the back plate 101 of the end reinforcement device 100 of the hatch support structure is provided with a first opening 104 for the hatch latch mechanism 301 to pass through and a second opening 105 for the auxiliary support beam structure 204 to pass through. The side plates 103 on both sides of the end reinforcement device 100 of the hatch support structure are respectively provided with two through holes 106.

[0034] like Figure 2 As shown, the hatch latch mechanism 302 of the hatch locking mechanism 300 passes through the first opening 104 of the hatch support structure end reinforcement device 100, and the hatch locking rod mechanism 300 passes through two through holes 106 respectively provided on the side plates 103 on both sides of the hatch support structure end reinforcement device 100, thereby realizing the mutual assembly of the two, wherein the hatch locking rod mechanism 300 and the hatch latch mechanism 301 are connected. In addition, as Figure 2 As shown, the auxiliary load-bearing beam structure 204 of the hatch 200 passes through the second opening 105 of the end reinforcement device 100 of the hatch load-bearing structure.

[0035] In addition, such as Figure 3As shown, the end reinforcement device 100 of the hatch load-bearing structure has longitudinal and transverse reinforcing ribs 107 arranged on the base plate 102 to enhance the lateral stiffness of the overall structure, improve the load-bearing capacity, and enable the hatch as a whole to have a strong resistance to deformation when subjected to loads. Figure 3 In the example shown, one transverse reinforcing rib 107 and two longitudinal reinforcing ribs 107 are arranged, but the number of longitudinal and transverse reinforcing ribs 107 is not limited to this.

[0036] For example, the first opening 104 and through hole 106 provided on the end reinforcement device 100 of the hatch support structure are only used to provide installation space for the hatch locking mechanism 301 and the hatch latch mechanism 302 of the hatch locking mechanism 300 to pass through and assemble with each other. After assembly, the opening 104 and through hole 106 provided on the end reinforcement device 100 of the hatch support structure are not fixed or tightly connected with the hatch locking mechanism 301 and the hatch latch mechanism 302. Thus, when the hatch 200 is opened, closed and locked by using the hatch locking mechanism 301 and the hatch latch mechanism 302, the hatch locking mechanism 301 and the hatch latch mechanism 302 can move in the first opening 104, the second opening 105 and the through hole 106 respectively, for example, they can move or rotate to realize their functions.

[0037] However, this utility model is not limited to this. The hatch support structure end reinforcement device 100 can also be assembled without being connected to the hatch locking rod mechanism 301 and the hatch latch mechanism 302. Therefore, it is not necessary to provide an opening (first opening 104) and a through hole (through hole 106) on the hatch support structure end reinforcement device 100. In this case, the back plate 101 and bottom plate 102 of the hatch support structure end reinforcement device 100 are respectively engaged and fixed to the lower end frame structure 201 and hatch skin 202 of the hatch 200, and the hatch support structure end reinforcement device 100 and the support beam structure 203 are fitted together with a small gap.

[0038] Specifically, the end reinforcement device 100 of the hatch load-bearing structure can be configured with different thicknesses to suit different load characteristics. This effectively reduces the weight of the end reinforcement device 100 itself. Furthermore, the end reinforcement device 100 only needs to be locally installed at the lower end of the hatch 200, without needing to reinforce the entire thickness of the hatch 200. For example, in this embodiment, the end reinforcement device 100 is arranged in the space enclosed by the lower end frame structure 201 and the load-bearing beam structure 203 at the lower end of the hatch 200, which reduces the weight requirement for overall reinforcement of the hatch 200. While achieving local reinforcement of the end load-bearing structure of the hatch 200, the structure is compact and occupies less installation space.

[0039] While the embodiments of this utility model have been described in detail above, those skilled in the art should understand that these are merely illustrative examples, and the utility model is not limited to the specific details and representative embodiments shown and described herein. Those skilled in the art can make various suitable changes or modifications to these embodiments without departing from the scope of protection of the claims of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

[0040] For example, such as Figure 2 As shown in the figure, the hatch locking mechanism 300, including the hatch locking rod mechanism 301 and the hatch latch mechanism 302, is not limited to the structure shown in the figure, and can be any other suitable structural form. Therefore, the first opening 104 and the through hole 106 provided on the hatch support structure end reinforcement device 100 for the hatch latch mechanism 302 to pass through can also be of other shapes, and the positions of the first opening 104, the second opening 105, and the through hole 106 on the hatch support structure end reinforcement device 100 can also be different. Figure 2 The location shown.

[0041] also, Figure 3 The reinforcing rib 107 provided on the end reinforcement device 100 of the hatch load-bearing structure shown is only one example of this utility model. The arrangement, quantity and thickness of the lateral and / or longitudinal ribs of the reinforcing rib 107 on the end reinforcement device 100 of the hatch load-bearing structure can be adjusted according to different load conditions. Other forms of lateral and / or longitudinal reinforcement designs are also possible, and are not limited to the reinforcing rib 107 shown in this utility model.

Claims

1. A door load-bearing structure end reinforcement device (100), characterized in that, Multiple sets of the end reinforcement device (100) of the door bearing structure are locally arranged at the lower end of the bearing structure of the door (200), fixed to the lower end frame structure (201) and door skin (202) of the door (200), and assembled on the inner side of two adjacent bearing beam structures (203) used to transmit the load of the main structure of the door (200) by means of small clearance fit.

2. The end reinforcement device (100) of the hatch load-bearing structure as described in claim 1, characterized in that, The end reinforcement device (100) of the door load-bearing structure includes: A back panel (101) is fixedly connected to the lower end frame structure (201) of the hatch (200); A base plate (102), said base plate being fixedly connected to the hatch skin (202) of said hatch (200); and Side plate (103), the side plate being close to the inner side of the load-bearing beam structure (203) disposed on the hatch (200).

3. The end reinforcement device (100) of the hatch load-bearing structure as described in claim 2, characterized in that, The end reinforcement device (100) of the door load-bearing structure is assembled with the door locking mechanism (300) of the door (200) when it is installed on the door (200).

4. The end reinforcement device (100) of the hatch load-bearing structure as described in claim 3, characterized in that, The back plate (101) is provided with a first opening (104) through which the hatch latch mechanism (302) of the hatch locking mechanism (300) passes. The side plate (103) is provided with a through hole (106) through which the door locking rod mechanism (301) of the door locking mechanism (300) passes.

5. The end reinforcement device (100) of the hatch load-bearing structure as described in claim 4, characterized in that, The hatch locking lever mechanism (301) and the hatch latch mechanism (302) can move or rotate in the through hole (106) and the first opening (104) respectively to lock the hatch (200).

6. The end reinforcement device (100) of the hatch load-bearing structure as described in claim 2, characterized in that, When the hatch load-bearing structure end reinforcement device (100) is installed on the hatch (200), it is assembled with the auxiliary load-bearing beam structure (204) which is used to assist the load-bearing beam structure (203) in bearing the load.

7. The end reinforcement device (100) of the hatch load-bearing structure as described in claim 6, characterized in that, The back plate (101) is provided with a second opening (105) through which the auxiliary load-bearing beam structure (204) passes.

8. The hatch load-bearing structure end reinforcement device (100) as described in any one of claims 2 to 7, characterized in that, The back plate (101) and the side plate (103) of the end reinforcement device (100) of the door load-bearing structure can be configured with different thicknesses for different load characteristics.

9. The end reinforcement device (100) of the hatch load-bearing structure as described in claim 8, characterized in that, Longitudinal and transverse reinforcing ribs (107) are arranged on the base plate (102).

10. The hatch load-bearing structure end reinforcement device (100) as described in any one of claims 1 to 7, characterized in that, Multiple sets of the end reinforcement devices (100) of the door load-bearing structure are arranged at equal intervals, or in such a way that multiple sets of the end reinforcement devices (100) of the door load-bearing structure are arranged more closely in the parts where the load is more likely to be concentrated than in the parts where the load is less likely to be concentrated.

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