EVTOL aircraft fuselage frame

Abstract

The utility model discloses an eVTOL aircraft fuselage frame which comprises a front frame and a rear frame, the front frame comprises two front single frames, the two front single frames are adjacently distributed, the whole front single frame is of an annular structure, lightening holes are formed in the front single frames, and process ribs and connecting ribs are arranged on the front single frames. The fuselage frame has multiple functions, the connecting bosses are designed on the front frame body and the rear frame body, local thickening is achieved, the strength of a connecting area is improved, the exterior is connected with a hoisting connector for eVTOL aircraft assembling and transferring, the hoisting connector is installed when transferring is needed, and the hoisting connector is detached when using. And various functions of the eVTOL aircraft are met.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation equipment, and in particular to an eVTOL aircraft fuselage frame. 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 fuselage frame of the eVTOL aircraft supports the fuselage skin, connects other components and the longitudinal parts inside the fuselage, and as the main structure of the fuselage, in addition to performance considerations, it also needs to consider some special functions, such as positioning function, manufacturing transfer function, etc. In addition, the existing fuselage frames mostly adopt an integrated molding structure, such as patent 202010946899.1 (a fuselage frame beam skeleton structure in an aircraft). When a part is damaged, the entire part needs to be replaced, which is inconvenient for maintenance and has poor economic efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide an eVTOL aircraft fuselage frame 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 fuselage frame, including a front frame and a rear frame, the front frame includes two front single frames, the two front single frames are adjacently distributed, the front single frame is an annular structure as a whole, the front single frame is provided with a lightening hole, and the front single frame is provided with a process rib and a connecting rib.

[0005] Preferably, the rear frame comprises a rear frame body and a support, the support is connected to the rear frame body via a connecting piece, and the rear frame body is an annular structure as a whole.

[0006] Preferably, a connecting boss is provided on the front single frame.

[0007] Preferably, the connecting members are bolts and nuts.

[0008] The technical effects and advantages of the utility model: The body frame has multiple functions: connecting bosses are designed on the front frame and the rear frame body, which are partially thickened to improve the strength of the connection area. The outside is connected to the lifting joint for assembly and transportation of the eVTOL aircraft. When transportation is required, the lifting joint is installed, and when in use, the lifting joint is removed. It meets the various functions of the eVTOL aircraft;

[0009] High product precision: Process ribs are designed on the front frame and the rear frame. During the processing, the shape of the frame is fixed to prevent it from deforming, so that it can better match the fuselage skin and the product precision is high;

[0010] Low cost: The support on the rear frame is a separate part installed on the rear frame body through a connector, and is not processed as a whole, which effectively reduces the size and processing amount of the raw material of the rear frame body, and effectively reduces the raw material and processing costs;

[0011] Easy to use: The connector connected to the lifting joint is always installed on the eVTOL aircraft. When installing the lifting joint, no additional connector is required, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an axonometric drawing of the utility model;

[0013] Figure 2 It is a partial view of the connection between the rear frame and the external hanging point of the utility model;

[0014] Figure 3 It is a partial view of the connection between the front frame and the external lifting point of the utility model;

[0015] Figure 4 It is an axonometric view of the front frame of the utility model;

[0016] Figure 5 It is an axonometric view of the utility model in the position of an eVTOL aircraft.

[0017] In the figure, 1. fuselage frame; 11. front frame; 111. connecting boss; 112. connecting rib; 113. lightening hole; 114. process rib; 115. front single frame; 12. rear frame; 121. rear frame body; 122. support; 13. connector; 2. eVTOL aircraft. DETAILED DESCRIPTION

[0018] 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.

[0019] Example

[0020] like Figure 5 As shown, the fuselage frame 1 is arranged inside the fuselage of the eVTOL aircraft 2 and crosses the center of gravity of the eVTOL aircraft 2. When the external lifting joint is connected to the fuselage frame 1 and the eVTOL aircraft 2 is lifted, it can ensure that the eVTOL aircraft 2 is smoothly transported without damaging the fuselage.

[0021] like Figure 1 As shown, the fuselage frame 1 includes a front frame 11 and a rear frame 12. The front frame 11 includes two front single frames 115 that are relatively close to each other on the fuselage. The front single frame 115 is annular in structure as a whole. The rear frame 12 is arranged at the rear of the center of gravity, which is a single frame structure. The positions where the front frame 11 and the rear frame 12 are connected to the external lifting joints are distributed on the left and right sides, with a total of 4 connection areas, which can maintain the balance when the eVTOL aircraft 2 is lifted.

[0022] like Figure 2 As shown, the rear frame 12 includes a rear frame body 121 and a support 122. The support 122 is connected to the rear frame body 121 through a connecting piece 13. The rear frame body 121 is an annular structure as a whole. The rear frame body 121 and the support 122 are both made of aluminum alloy material, preferably 7075, and preferably heat-treated in the state of T7351. The support 122 is installed on the rear frame body 121 as a separate part, in order to reduce the size and amount of the processed rough material when integrated together, thereby reducing the cost.

[0023] like Figure 3 , Figure 4As shown, the front single frame 115 of the front frame 11 is designed with a connecting boss 111, a connecting rib 112, a lightening hole 113, and a process rib 114. The rear frame body 121 is also designed with a similar structure. The connecting boss 111 strengthens the area connected to the lifting joint to reduce the stress level in this area. The connecting rib 112 is connected to other parts in the fuselage to meet the force transmission requirements in the fuselage. The lightening hole 113 removes the material of the part with less stress on the structure to reduce the weight of the structure. The process rib 114 takes into account that when the front frame 11 is processed, the cutting force of the tool will cause the parts to deform. The process rib 114 fixes the vertical edge of the parts to prevent the parts from deforming and improve the processing accuracy of the parts. The front frame 11 is made of aluminum alloy material, the preferred material is 7075, and the preferred heat treatment state is T7351.

[0024] like Figure 2 , Figure 3 As shown, in addition to the connection between the support 122 and the rear frame body 121, the connection 13 is also used to connect the front frame 11 to the lifting joint, the rear frame body 121 and the support 122 to the lifting joint. The connection 13 connecting the support 122 and the rear frame body 121 is a combination of bolts and nuts; the connection 13 connecting the lifting joint to the front frame 11, the rear frame body 121, and the support 122 is a combination of bolts and support plate nuts. There are 4 fasteners connected to the lifting joint to ensure that the forces in the upper and lower, front and back, left and right directions can be borne during lifting, ensuring safety during lifting.

[0025] 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 fuselage frame, comprising a front frame and a rear frame, characterized in that: The front frame includes two front single frames, the two front single frames are adjacently distributed, the front single frame is an annular structure as a whole, lightening holes are opened on the front single frame, and process ribs and connecting ribs are arranged on the front single frame.

2. The eVTOL aircraft fuselage frame according to claim 1, characterized in that: The rear frame comprises a rear frame body and a support, the support is connected to the rear frame body through a connecting piece, and the rear frame body is an annular structure as a whole.

3. The eVTOL aircraft fuselage frame according to claim 1, characterized in that: The front single frame is provided with a connecting boss.

4. The eVTOL aircraft fuselage frame according to claim 2, characterized in that: The connecting pieces are bolts and nuts.

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