A flying skateboard main structure

Abstract

The present invention discloses a flying skateboard main structure, comprising a center plate, ribs, an oil tank, an annular reinforcement frame, a vector power mechanism, and outriggers. The vector power mechanism comprises a plurality of engines. The center plate is a flat plate structure and serves as the main load-bearing component. It is provided with an installation interface for installing the engine and a driver's footrest area. The ribs are two, one end of which is vertically mounted on the lower surface of the center plate, and the other end of the rib is connected to the outriggers via a joint. The oil tank is located outside the two ribs, the upper end of the oil tank is connected to the lower surface of the center plate, the side wall of the oil tank is connected to the ribs, and the interior of the oil tank is used to accommodate a flexible oil bag. The annular reinforcement frame is located inside the two ribs. The outriggers are mounted on the lower ends of the ribs. The present invention has a high degree of integration. While maintaining high mechanical performance, the flexible oil bag is built into the body, effectively improving the miniaturization of the product.

Description

Technical Field

[0001] The present invention belongs to the technical field of aircraft, and relates to a flying skateboard main structure, and in particular to a small reusable single-pilot aircraft structure for single-person powered short-distance low-altitude controllable flight. Background Art

[0002] In recent years, the technology of single-person aircraft has become increasingly mature, and a variety of configurations have been developed, including skateboard-type, backpack-type, multi-rotor-type, and ducted fan-type. These aircraft have the characteristics of small size, fast response, strong maneuverability, and strong environmental adaptability. Compared with traditional land, water, and air transport equipment, they have obvious advantages in ultra-short-range and cross-complex land (sea) rapid delivery. Currently, the backpack-type single-person aircraft commonly seen abroad strap multiple engines to the pilot's arms, and carry the fuel and main engine in the form of a backpack behind him. The entire device is composed of multiple parts, which is cumbersome to put on and take off. The engine nozzle is close to the pilot's legs, posing installation risks. Multi-rotor aircraft refer to the design concept of drones. The aircraft is large in size, making it difficult to achieve portability. At the same time, due to the limited power of the electric drive, it is difficult to complete long-term flight. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned drawbacks and provide a flying skateboard main structure that overcomes the technical problem of low integration of existing aircraft. The present invention has a high degree of integration and effectively improves the miniaturization of the product while maintaining high mechanical performance.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0005] A flying skateboard main structure includes: a center plate, ribs, a vector power mechanism, legs, an oil tank and a circumferential reinforcement frame;

[0006] The vector power mechanism includes several independent engines;

[0007] The center panel is a flat plate structure with mounting interfaces for the engine and a driver's footrest area;

[0008] The rib plate consists of two pieces, the upper end of which is connected to the lower surface of the center plate, and the rib plate includes a main plate perpendicular to the center plate;

[0009] The oil tank is located outside the two ribs, with the upper end of the oil tank connected to the lower surface of the center plate, the side wall of the oil tank connected to the ribs, and the interior of the oil tank is used to accommodate a flexible oil bag;

[0010] The annular reinforcement frame is arranged on the inner side of the two ribs;

[0011] The legs are installed at the lower end of the ribs.

[0012] Furthermore, the center panel includes an upper skin, a lower skin and a sandwich core, wherein the sandwich core in the load-bearing area of ​​the center panel is a composite material solid, the sandwich core in the non-load-bearing area of ​​the center panel is foam, and the upper skin and the lower skin are carbon fiber / epoxy resin composite materials;

[0013] The center plate load-bearing area includes the driver's footrest area and the vector power mechanism installation area, and the center plate non-load-bearing area is other areas outside the center plate load-bearing area;

[0014] The composite material body of the pilot's footrest area is provided with bolt holes for fixing to the pilot's flight boots;

[0015] PEEK embedded parts or metal embedded parts are embedded in the foam of the non-load-bearing area of ​​the center plate, and the PEEK embedded parts or metal embedded parts are used for installing other required mechanisms.

[0016] Furthermore, the upper and lower skins are made of T700 carbon fiber / 603B epoxy resin composite materials, and the core material of the non-load-bearing area of ​​the center panel is PMI foam. 110WH;

[0017] The cross-sectional thickness of the center panel is 10-15 mm, and the thickness of the upper and lower skins of the center panel are 1-1.5 mm respectively;

[0018] The width of the driver's footrest area is 25 to 35 mm.

[0019] Furthermore, the vector power mechanism includes five engines, and five mounting interfaces for mounting the five engines are arranged in a honeycomb structure; each mounting interface is provided with a frame having a thickness of 10 to 15 mm;

[0020] Among the five engines arranged in a honeycomb structure, except for the engine in the center, the other engines are equipped with vector nozzles;

[0021] The engine is connected to the frame of the mounting interface through horizontal lugs.

[0022] Furthermore, the rib plate further includes two diagonal support plates perpendicular to the main plate, the two diagonal support plates are connected to the upper end of the main plate, and the upper end surfaces of the two diagonal support plates and the upper end surface of the main plate form a U-shaped support surface;

[0023] The rib plate is fixedly connected to the lower surface of the center plate, and the U-shaped supporting surface corresponds to the position of the driver's footrest area set on the center plate.

[0024] Furthermore, the mainboard in the rib plate includes an upper skin, a lower skin and a sandwich core, wherein the sandwich core in the load-bearing area of ​​the mainboard is a composite material entity, the sandwich core in the non-load-bearing area of ​​the mainboard is foam, and the upper and lower skins are carbon fiber / epoxy resin composite materials;

[0025] The connection between the main board and the center board is thickened to 18-20mm, and the thickness of the rest of the board is 10-15mm;

[0026] The upper and lower skins at the joints between the diagonal bracing plate and the center plate are thickened to 2 to 3 mm, and the thickness of the upper and lower skins in the remaining parts is 1 to 1.5 mm.

[0027] Furthermore, the fuel tank includes four side buckets and two hatches;

[0028] The upper ends and one side of the side buckets are open. The upper ends of the four side buckets are connected to the lower surface of the four corners of the center plate by means of lugs. The four side buckets are divided into two groups. Each group includes two side buckets with open sides facing each other. Two hatches are provided between the two side buckets with open sides facing each other in each group. Each group of two side buckets with open sides facing each other, one hatch, and the lower surface of the center plate form a cavity. The four side buckets, two hatches, and the lower surface of the center plate together form two independent cavities.

[0029] The side bucket is arranged on the outside of the rib plate, and the side wall of the side bucket is connected to the rib plate by gluing and screwing; when the upper end of the side bucket is connected to the lower surface of the center plate, a gap is left between the upper end of the side bucket and the lower surface of the center plate; the flexible oil bag is a rubber oil bag structure, and the hanging ear of the flexible oil bag passes through the gap to pass through the oil tank and is fixed to the lower surface of the center plate. The inside of the oil tank is filled with explosion-proof sponge to maintain the shape of the oil tank.

[0030] Furthermore, the side bucket includes a frame and a side wall supported by the frame; the thickness of the side wall is 1.2 to 1.5 mm;

[0031] The hatch is an L-shaped structure, with a composite sandwich structure beam at the corner and the rest of the structure made of thin-walled composite materials with a wall thickness of 1.5 to 2 mm. The hatch is flared 10 to 15 mm on all sides.

[0032] Aluminum alloy threaded embedded parts are pre-embedded at both ends of the crossbeam to achieve connection with the two side buckets; a tongue is provided at the bottom of the hatch, and a slot for cooperating with the tongue is provided on the outside of the rib; a buckle is provided at the top of the hatch, and a gap for cooperating with the buckle is provided on the lower surface of the center plate.

[0033] Furthermore, a groove is provided on the inner side of the rib plate, the annular reinforcement frame is placed in the groove and fixedly connected to the rib plate, and an aluminum alloy threaded embedded part is provided in the annular reinforcement frame, and screws are used to cooperate with the aluminum alloy threaded embedded part to achieve a fixed connection between the annular reinforcement frame and the rib plate;

[0034] The annular reinforcement frame is a closed frame formed by several segments of straight square tubes. The inner core of the square tubes is a foam material, and the tube wall of the square tubes is a composite material with a thickness of 1 to 1.5 mm. The annular reinforcement frame includes a first straight side, a first folded side, a second straight side, and a second folded side in sequence. The first straight side and the second straight side are parallel, the first folded side and the second folded side are respectively protruding outward, and the corners where the two straight sides and the two folded sides meet are supported by inclined planes.

[0035] There are two annular reinforcement frames, which are arranged up and down.

[0036] Furthermore, the support leg includes a composite material tube and a rubber shock absorber mounted on an end of the composite material tube;

[0037] The upper end of the composite pipe is connected to the lower end of the rib and the oil tank using an aluminum alloy joint;

[0038] An unmanned control equipment installation interface is provided on the upper surface of the center plate. The unmanned control equipment includes a gyro inertia resistance, a controller, a data transmission device, an antenna or a servo drive. A power battery for powering the unmanned control equipment is installed on the annular reinforcement frame.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] (1) The present invention creatively proposes a flying skateboard main structure that highly integrates flexible oil bags, engines and other equipment, effectively improving the miniaturization of the product while maintaining high mechanical performance;

[0041] (2) The material used in the main structure of the flying skateboard of the present invention is mainly a composite sandwich structure, and is locally reinforced, which can maximize the lightweight structure;

[0042] (3) The main structure of the flying skateboard of the present invention can flexibly integrate flight control equipment, data communication equipment, etc. according to needs, and can be compatible with both manned and unmanned flight modes; on the upper surface of the center plate of the skateboard, an unmanned control equipment installation interface is reserved in front of the flight boots, and the main installed equipment includes gyro inertia resistance, controller, data transmission device, antenna, and servo drive. On the rear side of the skateboard, a power battery is installed on the ring frame to power the above-mentioned control system.

[0043] (4) The embedded flexible oil bag of the present invention realizes the portability requirement of a single-person aircraft for the first time;

[0044] (5) The skateboard product of the present invention has a total weight of about 50 kg and a size not exceeding 1100X700X700, and the product has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a three-dimensional structural diagram of the main structure of a flying skateboard of the present invention;

[0046] Figure 2 This is a top view of the main structure of a flying skateboard according to the present invention;

[0047] Figure 3 This is a bottom view of the main structure of a flying skateboard according to the present invention;

[0048] Figure 4 This is a schematic diagram of the center plate of the present invention;

[0049] Figure 5 Schematic diagram of the sandwich structure of the center plate of the present invention;

[0050] Figure 6 This is a schematic diagram of the rib plate of the present invention;

[0051] Figure 7 Schematic diagram of the rib sandwich structure and embedded parts of the present invention;

[0052] Figure 8 This is a schematic diagram of the rib sandwich structure of the present invention;

[0053] Figure 9 This is a front view of the rib plate of the present invention;

[0054] Figure 10 This is a schematic diagram of the main frame and oil tank of the present invention;

[0055] Figure 11 This is a schematic diagram of the side bucket of the oil tank of the present invention;

[0056] Figure 12 Schematic diagram of the hatch of the oil tank of the present invention;

[0057] Figure 13 This is a schematic diagram of the oil supply system of the present invention;

[0058] Figure 14 This is a schematic diagram of the annular reinforcement frame of the present invention;

[0059] Figure 15 Schematic diagram of the aluminum alloy embedded parts in the annular reinforcement frame of the present invention;

[0060] Figure 16 This is a schematic diagram of the supporting legs of the present invention;

[0061] Figure 17 This is a schematic diagram of the upper cover assembly of the present invention;

[0062] Figure 18 is a schematic diagram of a decorative element of the present invention;

[0063] Figure 19 This is a schematic diagram of the handrail of the present invention;

[0064] Figure 20 This is an overall schematic diagram of the handrail of the present invention after installation;

[0065] Figure 21 This is a schematic diagram of the vector engine of the present invention;

[0066] In the figure, 1-center plate, 2-vector power mechanism, 3-support leg, 4-oil tank, 5-oil supply system, 7-rib plate, 8-circumferential reinforcement frame, 71-main plate, 72-bracing plate, 73-groove, 41-side bucket, 42-door, 43-L frame, 44-support ear, 45-gap, 46-threaded hole. DETAILED DESCRIPTION

[0067] The following detailed description of the present invention will make the features and advantages of the present invention more clear and explicit.

[0068] The word "exemplary" is used exclusively herein to mean "serving as an example, example, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0069] The flying skateboard uses aviation fuel as its energy source and a ducted fan engine as its propulsion. The pilot can stand or sit on the skateboard, enabling both automatic and operator-controlled flight modes. It can operate at altitudes of 5-100 meters, has a range of at least 15 kilometers, and can carry a maximum payload of 90 kg. This invention focuses on the design of lightweight, compact, highly integrated, and portable structures and mechanisms for a skateboard powered by a small turbojet engine.

[0070] The present invention provides a flying skateboard with a main structure made of all-carbon fiber, high-strength composite materials. Its plate-like structure effectively reduces structural weight. Furthermore, a flexible oil bag is integrated into the skateboard's main body for a lightweight design. This design allows for single-person flight under various load conditions, resulting in high structural reliability, portability, lightweight design, and high integration. Furthermore, a vectoring mechanism is installed in the center of the skateboard, along with a vectoring nozzle for adjustable thrust direction, providing vertical takeoff and landing capabilities. Aiming to enable single-person short-term flight, the present invention leverages its compactness and portability to enable independent, short-distance vertical takeoff and landing for a single person.

[0071] In a preferred embodiment, the main structure of the flying skateboard of the present invention includes: a center plate 1, ribs 7, a vector power mechanism 2, legs 3, an oil tank 4 and a circumferential reinforcement frame 8. Optionally, it also includes decorative non-load-bearing components. The decorative non-load-bearing components are installed on the surface of the center plate 1 to encapsulate equipment, cables, and oil circuits. The equipment includes various types of equipment such as control systems and communication and measurement systems.

[0072] The center plate 1, ribs 7, and annular reinforcement frame 8 are primarily made of carbon fiber resin-based sandwich composite materials; the vector power mechanism 2 is primarily made of high-temperature alloy materials, while the crank mechanism and clamps are made of stainless steel; the outriggers 3 provide support for takeoff and landing, and are subject to significant static loads and impacts, and are made of carbon fiber composite pipes; the oil tank 4 is a thin-walled composite shell containing a rubber oil bladder. The pilot's handrail on the board is an optional feature. The main structural materials of the flying skateboard are shown in Table 1. The main frame in Table 1 includes the center plate 1, ribs 7, and annular reinforcement frame 8, and optionally, decorative non-load-bearing components.

[0073] Table 1 Main structural materials of flying skateboard

[0074]

[0075] The following is combined with Figures 1 to 21 Describe the structure and materials of each component in detail.

[0076] The overall structure of the present invention is as follows Figure 1 、 Figure 2 、 Figure 3 shown.

[0077] (1) Center plate: Figure 4 The center plate 1 serves as the main load-bearing structure of the flying skateboard, bearing the load of the engine, flexible oil bag and the driver, while also providing a reliable installation support interface for the control system equipment and the engine.

[0078] In order to achieve high strength, high rigidity and high reliability while making the structure lightweight to the greatest extent, the present invention combines carbon fiber thin-wall composite materials with lightweight foam sandwich cores, and only reinforces the connection area or load-bearing area locally, among which the center plate is the most representative. Figure 5 The center panel 1 consists of an upper skin, a lower skin, and a sandwich material. The sandwich material in the load-bearing area of ​​the center panel 1 is a composite material solid, and the sandwich material in other areas outside the center panel's load-bearing area is foam. The center panel's load-bearing area includes the driver's footrest area. The center panel 1 is a sandwich flat plate with a cross-section thickness of 10mm. The upper and lower skins are made of T700 / 603B composite material with a thickness of 1mm. The middle sandwich material is PMI foam. 110WH.

[0079] The honeycomb structure in the middle of the center panel 1 is used to install five engines. The installation frame is made of a 10mm thick carbon fiber composite material plate with L-shaped flanges to increase strength.

[0080] To enhance support strength, a composite solid core, 30mm wide, is installed in the driver's footrest areas on both sides. Four M6 bolt holes are provided in this composite solid core, through which the pilot's flight boots are secured to the skateboard during flight. The rest of centerboard 1 is constructed entirely of foam core. Metal inserts are installed in threaded holes for devices like batteries, inertial resistance, and central controllers. PEEK inserts are embedded in decorative, non-load-bearing components and clamp mounting locations. Threads subject to higher loads are fitted with metal inserts, while threads subject to lower loads are fitted with PEEK inserts.

[0081] Various types of clamps are installed on the center plate 1, including cable clamps for binding cables, oil line clamps for fixing oil supply pipelines, etc.

[0082] (2) Ribs: Figure 10 , supporting ribs 7 are installed on both sides below the center plate 1, as shown Figure 7 and Figure 8 The rib 7 adopts a composite sandwich structure, the load-bearing area is lined with a composite solid sandwich, and the non-load-bearing part is 110WH foam sandwich, with a large skin area thickness of 1mm. The upper end of rib 7 is fixedly connected to center plate 1, which has countersunk holes. Rib 7 is partially lined with a composite solid body and embedded with 7-M5 stainless steel bushings. The bottom of rib 7 is screwed to the aluminum alloy joint used to mount the support leg 3 with 4-M5 screws, and the aluminum alloy joint has threaded holes. Rib 6 is connected to the upper and lower annular reinforcement frames 8 with 5-M5 bolts, and the annular reinforcement frames 8 are embedded with threaded embedded parts. The load-bearing area includes: five honeycomb frames for engine mounting, left and right footrest areas, and the connection between these two areas.

[0083] Specifically, such as Figure 6 and Figure 9 The rib 7 includes a main board 71 and two diagonal bracing plates 72. The diagonal bracing plates 72 are perpendicular to the main board 71. The upper end surfaces of the two diagonal bracing plates 72 and the upper end surface of the main board 71 form a U-shaped support surface. When the rib 7 is fixedly connected to the center plate 1, the position of the U-shaped support surface corresponds to the position of the driver's footrest area of ​​the center plate 1. The nominal thickness of the cross section of the rib 7 is 10 mm. The part connected to the driver's footrest area at the top of the main board 71 is thickened to 18 mm. It can also be considered that the thickened area extends from the top of the main board 71 to the position corresponding to the lower end of the diagonal bracing plates 72. The main board 71 is reinforced with composite material integral embedded parts in the top center plate connection area, the upper annular reinforcement frame connection area, and the edges on both sides. The skin thickness at the connection between the diagonal bracing plates 72 and the center plate 1 is increased to 2 mm to improve the load-bearing capacity. The diagonal bracing plate is also a foam sandwich, and 2 mm is the skin thickness on both sides of the diagonal bracing.

[0084] The groove 73 provided on the rib plate 7 is used to connect to the annular reinforcement frame 8 .

[0085] (3) Oil tank: Figure 10The flexible oil bag is installed in the closed oil tank 4 formed by four side buckets 41 and two hatches 42. Figure 11 The side bucket 41 adopts a thin-wall + half-frame structure, and the upper end and one side of the side bucket 41 are open; the side bucket 41 includes a frame and side walls supported by the frame; the large area of ​​the side wall is 1.2mm thick. The side bucket 41 is connected to the center plate 1 by an L-frame 43 + a lug 44. The upper end of the L-frame 43 is connected to the center plate 1 by screws, one side of the L-frame 43 is fitted with the hatch 42, and the bottom end of the L-frame 43 is inserted with an aluminum alloy joint to connect with the rib plate, and the interior is filled with foam. The upper end of the L-frame 43 is pre-embedded with a stainless steel embedded part, and the embedded part has reserved threaded holes to connect with the upper plate. The threaded hole 46 reserved on the side of the embedded part is the lifting interface of the skateboard, which is used to meet the lifting and fixing of the skateboard in certain situations. For example, this interface can be used to fix the skateboard with bolts when it is installed in a packaging box; or when the skateboard needs to be lifted, the threads on these four joints can also be used. The lug 44 is connected to the center plate 1, and the surrounding composite material is folded down for reinforcement. The inner wall of the side bucket is glued to the ribs (7) using epoxy adhesive J22, and the glued surfaces are secured with screws. A gap 45 is provided between each side bucket (41) and the center plate (1) for securing the oil bladder mounting lugs. M10 threaded holes 46 are provided on the side of the metal insert at the top of the half-frame for lifting the slide plate. Four of these holes are located throughout the entire machine.

[0086] like Figure 12 The hatch is composed of a thin-walled composite material part and a crossbeam at the corner. The wall thickness of the thin-walled composite material part is 1.5mm. The crossbeam at the corner is a composite sandwich structure. Aluminum alloy threaded embedded parts are pre-embedded at both ends of the crossbeam at the corner, and are fastened to the L-frame 43 of the two side buckets by two screws. In order to enhance the rigidity and deformation resistance of the thin-walled shell, the hatch 42 is turned outward by 10mm on all sides. The hatch 42 is installed in a snap-on manner for easy disassembly and assembly. Two tongues (30X8X1.5mm) extend from the bottom of the hatch 42 and are inserted into the slots of the rib 7. A 50mm long snap is reserved at the top center of the hatch 42 to engage with the gap at the bottom of the center plate 1. In addition, an antenna platform and interface are reserved at the bottom of the left hatch.

[0087] The flexible oil bag adopts a rubber soft oil bag solution and is installed inside the oil tank 4. In order to make the oil tank shell three-dimensional, the oil tank 4 is filled with explosion-proof sponge; each oil bag has four hanging ears extending from the four corners and fixed on the center plate 1.

[0088] like Figure 13 The oil supply system includes a flexible oil bag and an oil supply pipeline. An opening is provided at the bottom of the hatch. One end of the oil supply pipeline is connected to the flexible oil bag through the opening, and the other end is connected to each engine.

[0089] (4) Circumferential reinforcement frame: Figure 14The annular reinforcement frame 8 is made of a square tube of composite material with a foam core. The overall width of the lower annular reinforcement frame is 25X15mm, and the composite wall thickness is 1mm. The corners are designed with inclined cross-sections to prevent the annular frame from becoming unstable. The overall width of the upper annular reinforcement frame is 20X16mm, and the composite wall thickness is 1mm. The core foam is made of PMI foam. 110WH, density 0.110×103kg / m 3 . Aluminum alloy threaded embedded parts are installed at the connection between the annular reinforcement frame 8 and the rib plate 7, such as Figure 15 , connected with 4-M5 countersunk screws.

[0090] (5) Legs: Figure 16 The main body of the outrigger 3 is a composite tube with an outer diameter of Φ45mm and a wall thickness of 5mm. Aluminum alloy joints connect the ribs, side buckets, and outriggers. Rubber shock absorbers are installed at the ends of the outriggers.

[0091] (6) Vector power mechanism: Figure 21 The present invention uses 5 P400 engines to form a vector power mechanism. The middle one is called the central engine, and the surrounding 4 are called vector engines. Except for the central engine, the other engines are equipped with vector nozzles. The central engine is connected to the honeycomb frame of the skateboard body through 4 horizontal lugs, and the surrounding 4 vector engines are connected to the honeycomb frame of the skateboard through 3 horizontal lugs. The engine clamp is made of stainless steel and is tightened to each other with two M4 bolts. During installation, the arc of the clamp is positioned with the servo mounting surface, and the mounting surfaces of the other lugs are matched with adjustment pads.

[0092] (7) Decorative non-load-bearing components: Decorative non-load-bearing components include upper cover components, cable covers, equipment decorative panels, etc., which serve as protection and decoration parts of the flying skateboard. They are made of resin material and are integrally molded, with steel wire screw sleeves embedded in the threads.

[0093] like Figure 17 The upper cover assembly consists of an upper cover and a top cover. The theoretical thickness of the upper cover is 3mm, with space reserved for a nylon protective screen, which can be added later to prevent debris from entering the engine. To simplify the disassembly and maintenance of the slide, the upper cover utilizes a deformable non-metallic material to snap onto the main frame and is secured with four M4 screws. The top cover and upper cover are connected with eight M4 screws. The top cover is not disassembled unless necessary for slide maintenance.

[0094] like Figure 18 , cable cover and equipment decorative plate, theoretical thickness 3mm, fixed to the main shell with M4 screws.

[0095] (8) Armrest: Figure 19 and Figure 20The skateboard is equipped with optional pilot handrails, made of carbon fiber tubing with a cross-section width of 20×20×2mm, which are fixed to the sides of the flight boots at three points. Three M6 mounting interfaces are reserved on the skateboard for optional installation when necessary.

[0096] The main load-bearing structure of the present invention uses a large area of ​​carbon fiber resin-based composite sandwich panels. At the same time, reliability design is achieved through methods such as sandwich structure mechanical simulation, connection embedded part structure design, high-precision component assembly technology, inspection and testing methods, fatigue performance investigation, and potential corrosion prevention.

[0097] To ensure excellent flight stability and maneuverability, the portable flying skateboard utilizes four micro-turbojet engines equipped with thrust vectoring nozzles. The structural design of the vectoring nozzles at high temperatures involves temperature field simulation and analysis of the dynamic characteristics of the mechanism.

[0098] The cushioned landing structure of this invention uses four legs connected to the main structure, with the support area serving as the force transmission center. This provides high connection strength under multiple operating conditions, including flight and landing. Rubber shock absorbers are used at the ends of the legs to mitigate the impact of landing.

[0099] The present invention has been described in detail above with reference to specific embodiments and exemplary examples. However, these descriptions should not be construed as limiting the present invention. Those skilled in the art will appreciate that various equivalent substitutions, modifications, or improvements may be made to the technical solutions and implementations of the present invention without departing from the spirit and scope of the present invention, all of which fall within the scope of the present invention. The scope of protection of the present invention shall be determined by the appended claims.

[0100] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A flying skateboard main structure, characterized in that: include: Center plate (1), rib plate (7), vector power mechanism (2), support leg (3), oil tank (4) and annular reinforcement frame (8); The vector power mechanism (2) includes a plurality of independent engines; The center plate (1) is a flat plate structure and is provided with an installation interface for installing the engine and a driver's footrest area; The rib plates (7) are two pieces, the upper ends of the rib plates (7) are connected to the lower surface of the center plate (1), and the rib plates (7) include a main plate perpendicular to the center plate (1); The oil tank (4) is arranged outside the two ribs (7), the upper end of the oil tank (4) is connected to the lower surface of the center plate (1), the side wall of the oil tank (4) is connected to the ribs (7), and the interior of the oil tank (4) is used to accommodate a flexible oil bag; The annular reinforcement frame (8) is arranged on the inner side of the two ribs (7); The supporting legs (3) are mounted on the lower ends of the ribs (7); The center panel (1) comprises an upper skin, a lower skin and a core, wherein the core in the load-bearing area of ​​the center panel (1) is a composite material entity, the core in the non-load-bearing area of ​​the center panel (1) is foam, and the upper skin and the lower skin are carbon fiber / epoxy resin composite materials; The load-bearing area of ​​the center plate (1) includes the driver's footrest area and the vector power mechanism installation area, and the non-load-bearing area of ​​the center plate (1) is other areas outside the load-bearing area of ​​the center plate (1); The composite material body of the pilot's footrest area is provided with bolt holes for fixing to the pilot's flight boots; PEEK embedded parts or metal embedded parts are embedded in the foam of the non-load-bearing area of ​​the center plate (1), and the PEEK embedded parts or metal embedded parts are used for installing other required mechanisms; The oil tank (4) includes four side buckets and two hatches; The upper end and one side of the side bucket are open, and the upper ends of the four side buckets are connected to the lower surface of the four corners of the center plate (1) by means of supporting ears. The four side buckets are divided into two groups, each group includes two side buckets with opposite open sides, and two hatches are provided between the two side buckets with opposite open sides in each group. The two side buckets with opposite open sides in each group, one hatch and the lower surface of the center plate (1) form a cavity. The four side buckets, the two hatches and the lower surface of the center plate (1) form two independent cavities. The side bucket is arranged outside the rib plate (7), and the side wall of the side bucket and the rib plate (7) are connected by gluing and screwing; When the upper end of the side bucket is connected to the lower surface of the center plate (1), a gap is left between the upper end of the side bucket and the lower surface of the center plate (1); the flexible oil bag is a rubber oil bag structure, and the hanging ear of the flexible oil bag passes through the oil tank (4) through the gap and is fixed to the lower surface of the center plate (1); the interior of the oil tank (4) is filled with an explosion-proof sponge for dimensional adjustment of the oil tank (4).

2. The flying skateboard main structure according to claim 1, characterized in that: The upper and lower skins are made of T700 carbon fiber / 603B epoxy resin composite materials, and the core material of the non-load-bearing area of ​​the center plate (1) is PMI foam. 110WH; The cross-sectional thickness of the center panel (1) is 10 to 15 mm, and the thickness of the upper and lower skins of the center panel (1) are respectively 1 to 1.5 mm; The width of the driver's footrest area is 25 to 35 mm.

3. The flying skateboard main structure according to claim 1, characterized in that: The vector power mechanism (2) includes five engines, and five mounting interfaces for mounting the five engines are arranged in a honeycomb structure; each mounting interface is provided with a frame with a thickness of 10 to 15 mm; Among the five engines arranged in a honeycomb structure, except for the engine in the center, the other engines are equipped with vector nozzles; The engine is connected to the frame of the mounting interface through horizontal lugs.

4. The flying skateboard main structure according to claim 1, characterized in that: The rib plate (7) further comprises two oblique support plates perpendicular to the main plate, the two oblique support plates being connected to the upper end of the main plate, the upper end surfaces of the two oblique support plates and the upper end surface of the main plate forming a U-shaped support surface; The rib plate (7) is fixedly connected to the lower surface of the center plate (1), and the U-shaped support surface corresponds to the position of the driver's footrest area provided on the center plate (1).

5. The flying skateboard main structure according to claim 4, characterized in that: The mainboard in the rib plate (7) comprises an upper skin, a lower skin and a sandwich core, wherein the sandwich core in the mainboard load-bearing area is a composite material entity, the sandwich core in the mainboard non-load-bearing area is foam, and the upper skin and the lower skin are carbon fiber / epoxy resin composite materials; The connection between the main plate and the center plate (1) is thickened to 18 to 20 mm, and the thickness of the remaining parts is 10 to 15 mm; The upper and lower skins at the connection between the diagonal support plate and the center plate (1) are thickened to 2-3 mm, and the thickness of the upper and lower skins at the remaining parts is 1-1.5 mm.

6. The flying skateboard main structure according to claim 5, characterized in that: The side bucket includes a frame and a side wall supported by the frame; the thickness of the side wall is 1.2 to 1.5 mm; The hatch is an L-shaped structure, with a composite sandwich structure beam at the corner and the rest of the structure made of thin-walled composite materials with a wall thickness of 1.5 to 2 mm. The hatch is flared 10 to 15 mm on all sides. Aluminum alloy threaded embedded parts are pre-embedded at both ends of the crossbeam to achieve connection with the two side buckets; a tongue is provided at the bottom of the hatch, and a slot for cooperating with the tongue is provided on the outside of the rib (7); a buckle is provided at the top of the hatch, and a gap for cooperating with the buckle is provided on the lower surface of the center plate (1).

7. The flying skateboard main structure according to claim 1, characterized in that: A groove is provided on the inner side of the rib plate (7), and the annular reinforcement frame (8) is placed in the groove and fixedly connected to the rib plate (7). An aluminum alloy threaded embedded part is provided in the annular reinforcement frame (8), and screws are used to cooperate with the aluminum alloy threaded embedded part to achieve fixed connection between the annular reinforcement frame (8) and the rib plate (7); The annular reinforcement frame (8) is a closed frame formed by a plurality of straight-line square tubes, the inner core of the square tubes is a foam material, and the wall of the square tubes is a composite material with a thickness of 1 to 1.5 mm; the annular reinforcement frame (8) comprises a first straight side, a first folded side, a second straight side and a second folded side in sequence, wherein the first straight side and the second straight side are parallel, the first folded side and the second folded side are respectively protruded outwards, and the corners at the connection between the two straight sides and the two folded sides are supported by inclined planes; There are two annular reinforcement frames (8), and the two annular reinforcement frames (8) are arranged up and down.

8. The flying skateboard main structure according to claim 1, characterized in that: The support leg (3) includes a composite material tube and a rubber shock absorber installed at the end of the composite material tube; The upper end of the composite material pipe is connected to the lower end of the rib plate (7) and the oil tank (4) by using an aluminum alloy joint; An unmanned control equipment installation interface is provided on the upper surface of the central plate (1), wherein the unmanned control equipment includes a gyro inertia resistance, a controller, a data transmission device, an antenna or a steering gear driver, and a power battery for powering the unmanned control equipment is installed on the annular reinforcement frame (8).

Images