EVTOL aircraft cargo hold door

Abstract

The utility model discloses an eVTOL airplane cargo hold door which comprises a cargo hold door body, the upper end of the inner side of the cargo hold door body is connected with a hinge through a connecting piece, the lower end of the inner side of the cargo hold door body is provided with a stop block, the lower end of the cargo hold door body is provided with a lock, the position of the lock corresponds to that of the stop block, the cargo hold door body comprises an inner plate, and the inner plate is provided with an outer plate. The inner plate is connected with the outer plate, the inner plate and the outer plate form a box body structure, the hinge is connected to the inner plate, and a hinge reinforcing seat is installed on the back face of the connecting position of the inner plate and the hinge. The outer plate and the inner plate of the cargo hold door body are both made of carbon fiber composite materials, and the structural weight is light; the cargo compartment door is arranged at the position 1 m above the ground, passengers can conveniently pick and place luggage without bending down, raising feet or using other tools and the like, and the man-machine friendliness is achieved; the outer surface of the lock is flush with the outer surface of the cargo hold door, the structure is attractive, and pneumatic resistance is small.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation equipment, and in particular to an eVTOL aircraft cargo door. Background Art

[0002] The development of eVTOL (Electric Vertical Takeoff and Landing) electric vertical takeoff and landing aircraft has attracted widespread attention from aerospace companies, the automotive industry, the transportation industry, the government, the military, and academia. The potential future applications of eVTOL involve a variety of scenarios such as urban passenger transport, regional passenger transport, freight, personal aircraft, and emergency medical services. The use of electric propulsion systems instead of internal combustion engine power has gained many advantages and unique qualities. The most prominent advantages are energy saving and environmental protection, high efficiency and low energy consumption, while achieving near-zero emissions, very low noise and vibration levels, and good ride comfort. It is a truly environmentally friendly aircraft. In addition, it also has the characteristics of safety and reliability, simple structure, easy operation and use, good maintainability / low cost, and good economy. There are also many advantages in design: the overall layout is flexible, the optimal layout and unconventional / innovative layout can be adopted; aircraft with extraordinary performance can be designed to meet special purpose needs, etc.

[0003] The cargo door of the eVTOL aircraft is the passage to the cargo hold. Passengers' luggage is loaded into the cargo hold through the cargo door. The size and weight of the passengers' luggage, as well as the convenience of picking up and putting the luggage, need to be considered; it needs to have a certain sealing performance to prevent rainwater from seeping into the luggage compartment; while meeting the functional requirements, it is also necessary to reduce the weight of the cargo door as much as possible. Therefore, this application provides an eVTOL aircraft cargo door to meet the above requirements. Utility Model Content

[0004] The purpose of the utility model is to provide an eVTOL aircraft cargo door to solve the problems mentioned in the background technology. To achieve the above purpose, the utility model provides the following technical solutions: an eVTOL aircraft cargo door, comprising a cargo door body, the inner upper end of the cargo door body is connected to a hinge through a connecting piece, the inner lower end of the cargo door body is provided with a stop block, the lower end of the cargo door body is installed with a lock, the position of the lock corresponds to the stop block, the cargo door body comprises an inner plate, the inner plate is connected to an outer plate, the inner plate and the outer plate form a box structure, the hinge is connected to the inner plate, and a hinge reinforcement seat is installed on the back of the connection between the inner plate and the hinge.

[0005] Preferably, a carbon fiber ply is laid around the connection between the inner panel and the hinge to form a reinforcement area, and the area of ​​the reinforcement area needs to be larger than the connection area of ​​the hinge.

[0006] Preferably, a lock tongue opening is formed at the lower end of the inner plate, the position of the lock tongue opening corresponds to the lock position, and the lock tongue of the lock can pass through the lock tongue opening.

[0007] Preferably, a stopping boss is provided on the stopping block, and the stopping boss is located on one side below the lock tongue opening and corresponds to the position of the lock tongue of the lock.

[0008] Preferably, the inner panel and the outer panel are connected around by structural adhesive.

[0009] Preferably, the connecting members are bolts and nuts.

[0010] Preferably, both the inner panel and the outer panel are made of carbon fiber composite material.

[0011] Preferably, a sealing strip is bonded around the inner side of the inner panel.

[0012] The technical effects and advantages of the utility model are as follows: the cargo door is light in weight: the outer and inner panels of the cargo door body are made of carbon fiber composite materials, and the structure is light in weight;

[0013] Human-machine friendly: The cargo door is located 1 meter above the ground, which is convenient for passengers to take and put luggage without bending over, raising their feet or using other tools, which is human-machine friendly;

[0014] Beautiful structure and good aerodynamic performance: the outer surface of the lock is flush with the outer surface of the cargo door, the structure is beautiful, and the aerodynamic resistance is small;

[0015] High rigidity: The carbon fiber composite material outer panel adopts a foam sandwich structure with high rigidity;

[0016] Low assembly precision requirement: It is only necessary to ensure the coaxiality of the two hinge mounting holes to realize the function of the cargo door rotating around the axis, and the assembly precision requirement is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 An axonometric view of the present invention from an external perspective;

[0018] Figure 2 An axonometric view of the interior perspective of the present invention;

[0019] Figure 3 It is an exploded view of the utility model;

[0020] Figure 4 This is an exploded view of the cargo door body of the utility model;

[0021] Figure 5 It is an axonometric view of the inner panel of the utility model;

[0022] Figure 6 It is an axonometric view of the stop block of the utility model;

[0023] Figure 7 It is a cross-sectional view of the edge area of ​​the cargo door body of the utility model;

[0024] Figure 8 This is an axonometric diagram of the utility model installed on an eVTOL.

[0025] In the figure, 1. cargo door; 11. cargo door body; 111. outer panel; 112. structural adhesive; 113. hinge reinforcement seat; 114. inner panel; 1141. lock tongue opening; 1142. reinforcement area; 115. sealing strip; 12. hinge; 13. lock; 14. stop block; 141. stop boss; 15. connector; 2. eVTOL aircraft. DETAILED DESCRIPTION

[0026] In order to make the technical means for realizing the utility model, creative features, objectives and effects easy to understand, the utility model is further explained below in conjunction with specific diagrams. In the description of the utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection or a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two components.

[0027] Example

[0028] like Figure 8 As shown, the cargo door 1 is arranged at the rear of the fuselage of the eVTOL aircraft 2, and the height from the ground is set according to the convenience of personnel taking and placing luggage. In this example, the height is 1 meter, which is convenient for loading and unloading luggage and is more human-machine friendly.

[0029] like Figure 1 , Figure 2 , Figure 3As shown, the cargo door 1 includes a cargo door body 11, a hinge 12, a lock 13, a stopper 14 and a connector 15. The stopper 14 is installed at the inner lower end of the cargo door body 11, and the lock 13 is installed at the lower end of the cargo door body 11. The position of the lock 13 corresponds to the stopper 14. The inner upper end of the cargo door body 11 and the hinge 12, and the hinge 12 and the fuselage of the eVTOL aircraft 2 are connected by a connector 15. The connector 15 is composed of bolts and nuts, which is convenient for disassembly and replacement. At the same time, the bolt and nut connection can easily adjust the gap and surface difference between the cargo door body 11 and the fuselage of the eVTOL aircraft 2, so that the outer surface of the cargo door body 11 and the outer surface of the fuselage of the eVTOL aircraft 2 remain smooth and smooth, reduce aerodynamic resistance, and improve aesthetics. The cargo door body 11 provides a passage for the cargo hold, and its shape is consistent with the fuselage shape of the eVTOL aircraft 2, withstands the aerodynamic force during flight, and prevents external water vapor from entering the cargo hold. The location where the hinge 12 is connected to the fuselage of the eVTOL aircraft 2 is the rotating shaft, and the rotating shafts of the two hinges 12 are in the same straight line, ensuring that the hinge 12 can rotate around the rotating shaft, thereby driving the opening and closing of the cargo door body 11. The lock 13 controls the locking and unlocking of the cargo door 1. When flying, the cargo door 1 is locked to prevent the cargo door 1 from opening during flight. When the cargo door 1 needs to be opened on the ground, the lock 13 is opened, the cargo door 1 is unlocked, and the loading and unloading of luggage is completed. The stop block 14 limits the lock tongue of the lock 13 to ensure reliable locking.

[0030] like Figure 4 As shown, the cargo door body 11 includes an outer plate 111, a structural adhesive 112, a hinge reinforcement seat 113, an inner plate 114, and a sealing strip 115. The inner plate 114 and the outer plate 111 form a box structure to improve the rigidity of the cargo door body 11. The inner plate 114 and the outer plate 111 are bonded together by the structural adhesive 112 on all sides. The inner plate 114 and the outer plate 111 are both made of carbon fiber composite materials, wherein the outer plate 111 has a simpler shape and adopts a foam sandwich structure of carbon fiber composite materials to improve the out-of-plane rigidity of the outer plate 111. The hinge 12 is connected to the inner plate 114, and a hinge reinforcement seat 113 is designed on the back of the connection with the hinge 12 to improve the rigidity of this area and reduce the stress level of the hinge connection area when the cargo door body 11 is subjected to force. The hinge reinforcement seat 113 is a box structure, which can be made of carbon fiber composite materials, aluminum alloy, steel and other materials. In this example, it is made of 7075 aluminum alloy, and the heat treatment state is T7351. The sealing strip 115 is bonded to the inner panel 114 and cooperates with the fuselage of the eVTOL aircraft 2. The sealing is completed by compressing the sealing strip 115. The compression amount in this example is 40%. The material of the sealing strip 115 can be rubber, sealing foam, etc. In this example, the sealing foam is high temperature resistant.

[0031] like Figure 5As shown, the inner panel 114 is reinforced by partially laying carbon fiber layers in the surrounding area to form a reinforcement area 1142 to improve the rigidity and strength. The area of ​​the reinforcement area needs to be larger than the hinge connection area. In this example, it is 20mm larger than the hinge connection area. In the area that cooperates with the lock 13, a lock tongue opening 1141 is designed at the lower end of the inner panel for the lock tongue to pass through, so that the lock tongue can lock and unlock the cargo door assembly 11.

[0032] like Figure 6 As shown, the stop block 14 is connected to the fuselage of the eVTOL aircraft 2, and a stop boss 141 is designed thereon. When the lock tongue rotates to the position of the stop boss 141, the lock tongue will not continue to move, and the lock tongue is limited, and the lock is kept in a locked state. The stop block 14 is integrally processed from aluminum alloy, the material is 7075, and the heat treatment state is T7351.

[0033] like Figure 7 As shown, the cargo door body 11 has a higher rigidity requirement in the surrounding area, and the hinge connection points, sealing strips 115, etc. are all connected in this area. The inner panel 114 is flanged in this area and bonded to the outer panel 111 by structural adhesive 112 to form an integral box-like structure.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An eVTOL aircraft cargo door, comprising a cargo door body, characterized in that: The inner upper end of the cargo door body is connected to a hinge through a connecting piece, the inner lower end of the cargo door body is provided with a stop block, and a lock is installed at the lower end of the cargo door body, and the position of the lock corresponds to the stop block. The cargo door body includes an inner plate, the inner plate is connected to an outer plate, and the inner plate and the outer plate form a box structure, the hinge is connected to the inner plate, and a hinge reinforcement seat is installed on the back side of the connection between the inner plate and the hinge.

2. The eVTOL aircraft cargo door according to claim 1, characterized in that: The area around the connection between the inner panel and the hinge is paved with carbon fiber layers to form a reinforcement area, and the area of ​​the reinforcement area needs to be larger than the connection area of ​​the hinge.

3. The eVTOL aircraft cargo door according to claim 1, characterized in that: A lock tongue opening is formed at the lower end of the inner plate, the position of the lock tongue opening corresponds to the lock position, and the lock tongue of the lock can pass through the lock tongue opening.

4. The eVTOL aircraft cargo door according to claim 3, characterized in that: The stop block is provided with a stop boss, which is located on one side below the lock tongue opening and corresponds to the position of the lock tongue.

5. The eVTOL aircraft cargo door according to claim 1, characterized in that: The inner plate and the outer plate are connected around by structural adhesive.

6. The eVTOL aircraft cargo door according to claim 1, characterized in that: The connecting pieces are bolts and nuts.

7. The eVTOL aircraft cargo door according to claim 1, characterized in that: The inner panel and the outer panel are both made of carbon fiber composite material.

8. The eVTOL aircraft cargo door according to claim 1, characterized in that: Sealing strips are bonded around the inner side of the inner plate.

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