A bamboo unmanned aerial vehicle main body structure

Abstract

The utility model discloses a kind of bamboo unmanned aerial vehicle main body structures, including fuselage main body, the fuselage main body includes bamboo front section fuselage and bamboo rear section fuselage, the front end of front section fuselage is provided with bamboo spherical head, the upper and lower sides of rear section fuselage are respectively provided with bamboo upper cover plate and bamboo lower cover plate. Make full use of the extremely high specific strength and specific modulus of bamboo, especially in its fiber longitudinal direction on excellent mechanical properties, by optimizing design skin, cover plate and main frame structure etc., under the premise of guaranteeing fuselage overall rigidity and strength, realize substantial weight reduction, effectively improve the load coefficient and endurance time of unmanned aerial vehicle. Bamboo is widely available, and has a short growth cycle. The cost of raw materials is much lower than carbon fiber. At the same time, the forming process (molding, laminating, etc.) involved in the utility model is relatively simpler than the traditional aerospace composite material manufacturing process, and does not require expensive autoclave equipment, greatly reducing manufacturing costs.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) structural technology, specifically a bamboo-based UAV main body structure. Background Technology

[0002] In recent years, weight reduction and improved endurance of unmanned aerial vehicle (UAV) structures have been important research directions in the aerospace field. Traditional aircraft structures mostly use metallic materials, but their large weight limits efficiency and performance. With advancements in materials science, fiber-reinforced composite materials (such as glass fiber and carbon fiber) have been widely used in aerospace components, significantly improving performance by reducing structural weight. Carbon fiber composites, for example, have a density of approximately 1.5 g / cm³, combining high strength with lightweight properties, and are gradually replacing traditional metallic materials in the UAV field. However, their raw material costs are high, manufacturing processes are complex, and carbon fiber waste is difficult to degrade naturally, making them environmentally unfriendly. Glass fiber is less expensive, but often suffers from insufficient strength, low stiffness, and poor weather resistance, making it difficult to meet the performance requirements of demanding applications. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a bamboo-based drone body structure. Compared with traditional metal, glass fiber and carbon fiber drone materials, this structure innovatively uses low-density bamboo material as the drone skin and frame structure, which significantly reduces the weight of the whole machine and thus effectively improves the endurance. It can effectively solve the problems in the background technology.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a bamboo-made unmanned aerial vehicle (UAV) main body structure, including a fuselage body, the fuselage body including a front section of bamboo fuselage and a rear section of bamboo fuselage, the front end of the front section of the fuselage is provided with a bamboo spherical end cap, the upper and lower sides of the rear section of the fuselage are respectively provided with a bamboo upper cover plate and a bamboo lower cover plate, and the rear end of the fuselage body is provided with a tail beam.

[0005] As a preferred technical solution of this utility model, the spherical end cap is made of bamboo woven material or molded from bamboo fiber and epoxy resin, and the spherical end cap is bonded to the front body.

[0006] As a preferred technical solution of this utility model, both the front and rear sections of the machine body are made by winding thin bamboo strips or weaving bamboo strips. The thickness of the thin bamboo strips is 0.1-0.4 mm, and the width of the bamboo strips is 2-10 mm.

[0007] As a preferred embodiment of this utility model, the front section of the fuselage and the rear section of the fuselage are connected by adhesive bonding.

[0008] As a preferred embodiment of this utility model, the rear section of the machine body is connected to the upper cover plate and the lower cover plate by quick-release bolts.

[0009] As a preferred technical solution of this utility model, both the upper cover plate and the lower cover plate are made of bamboo strips, and at least two layers of woven bamboo strips are laid.

[0010] As a preferred technical solution of this utility model, the tail beam is made of hollow bamboo tube or made of carbon fiber tube as the core layer and wrapped with bamboo fiber or bamboo strips, the width of the bamboo strips being 2-10mm.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. By making full use of bamboo’s extremely high specific strength and specific modulus, especially its excellent mechanical properties in the longitudinal direction of its fibers, and through optimized design of the skin, cover plate and main frame structure, a significant weight reduction was achieved while ensuring the overall rigidity and strength of the fuselage, effectively improving the drone’s payload coefficient and flight time.

[0013] 2. Bamboo, as a natural composite material, possesses excellent toughness and damping properties due to its fibrous structure. Compared to the more brittle carbon fiber composite material, the bamboo fuselage structure of this invention can effectively absorb impact energy through controllable deformation and crushing during collisions or falls, avoiding catastrophic instantaneous fracture, thus improving the aircraft's crashworthiness and survivability, and protecting its internal precision equipment.

[0014] 3. Bamboo is widely available and has a short growth cycle, resulting in raw material costs far lower than carbon fiber. Furthermore, the molding processes (molding, lamination, etc.) involved in this invention are simpler than traditional aerospace composite material manufacturing processes, eliminating the need for expensive autoclave equipment, significantly reducing manufacturing costs, and facilitating commercialization and large-scale production.

[0015] 4. The main fuselage structure and skin are based on renewable bamboo resources, and the entire life cycle, from raw material acquisition to product disposal, complies with green and environmentally friendly principles. The production process of bamboo is carbon negative, which helps reduce dependence on petroleum-based materials (such as resin and carbon fiber), reduces the overall carbon footprint, and is an environmentally friendly green aircraft solution. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the spherical head structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the front fuselage structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the overall structure of this utility model.

[0020] In the diagram: 1. Main fuselage, 2. Rear fuselage, 3. Tail boom, 4. Front fuselage, 5. Spherical end cap, 6. Upper cover plate, 7. Lower cover plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a technical solution: a bamboo-based unmanned aerial vehicle (UAV) main body structure, including a fuselage body 1. The fuselage body 1 comprises a front fuselage section 4 and a rear fuselage section 2 made of bamboo. Both the front fuselage section 4 and the rear fuselage section 2 are manufactured using fiberglass double-sided molds. One to three layers of bamboo woven material are used as the base layer, and 0 to six layers of bamboo green or bamboo yellow are used as the surface layer, laid inside the mold. Then, the VARI (vacuum-assisted molding) process is used to complete the injection molding. Alternatively, the bamboo covering method for the front fuselage section 4 and the rear fuselage section 2 can be replaced with thin bamboo strips or bamboo slivers wrapped around the inside of the double-sided mold, followed by the VARI process.

[0023] The front end of the front section 4 is glued to the spherical end cap 5, while the rear end is glued to the main body 1 via partial embedding. The diameters of the holes at the front and rear ends of the front section 4 are inconsistent. Using a simple unidirectional bamboo veneer would require complex splicing processes, making it difficult to guarantee the mechanical properties of the veneer material. Therefore, the front section structure primarily employs thin bamboo strip winding technology, where 0.1-0.4 mm thick thin bamboo strips or bamboo slivers are wound tightly into the mold. The winding method can be referenced... Figure 3 The mold is made of double-sided steel and manufactured using VARI (vacuum-assisted molding process). Alternatively, one to three layers of bamboo woven material can be used as the base layer, and 0 to 6 layers of bamboo green or bamboo yellow can be used as the surface layer. These layers are then laid inside the mold, and the VARI process is used to complete the injection molding.

[0024] Whether it is the winding of thin bamboo strips or the winding of thin bamboo strips or bamboo stalks with a mold, these are all well-known production methods in existing technology. They can be woven by traditional hand weaving or shaped with the assistance of appropriate weaving equipment.

[0025] The front end of the front fuselage 4 is equipped with a bamboo-made spherical end cap 5. The spherical end cap 5 has adhesive edges and is connected to the front fuselage 4 using an adhesive bonding method. It is difficult to use unidirectional tape for the spherical end cap 5, and this structure has certain thinness requirements, making carbon fiber fabric unsuitable. Therefore, the spherical end cap 5 is manufactured using a bamboo weaving method. For specific weaving techniques, please refer to [reference needed]. Figure 2 Alternatively, bamboo fiber can be directly blended with epoxy resin and then coated, followed by VARI (vacuum-assisted molding) process to complete the injection molding.

[0026] The rear fuselage 2 has a bamboo upper cover 6 on the upper side and a bamboo lower cover 7 on the lower side. The rear fuselage 2 is connected to the upper cover 6 and the lower cover 7 by quick-release bolts. Due to the high wave transmission requirements of the cover, which carbon fiber cannot meet, and the small size and low load-bearing capacity of the cover components, pure bamboo-based composite material is used to manufacture the upper and lower cover. The material is laid with at least three layers: 1-3 layers of bamboo woven material as the base layer, and 0-6 layers of bamboo green or bamboo yellow on the surface. It is manufactured using a fiberglass single-sided mold VARI.

[0027] The rear end of the fuselage body 1 is equipped with a tail boom 3. The front end of the tail boom 3 is connected to the cabin structure of the fuselage body 1 via a flange, and screw holes are provided in certain areas for fastening. The rear end of the tail boom 3 is connected to the rear engine of the UAV via a carbon fiber sleeve. The sleeve is fixed to the tail boom using mechanical fasteners (rivets, bolts), and then the rear engine is installed. The tail boom 3 uses a hollow bamboo tube or thin-walled carbon fiber tube as the core layer, reinforced with bamboo strips or bamboo fiber on the outside, and then molded as a whole using the VARI process after injection of glue.

[0028] The parts not disclosed in this utility model are all prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bamboo unmanned aerial vehicle body structure, comprising a fuselage body (1), characterized in that: The main body (1) includes a front section (4) made of bamboo and a rear section (2) made of bamboo. The front end of the front section (4) is provided with a bamboo spherical end cap (5). The upper and lower sides of the rear section (2) are respectively provided with a bamboo upper cover plate (6) and a bamboo lower cover plate (7). The rear end of the main body (1) is provided with a tail beam (3).

2. The bamboo unmanned aerial vehicle body structure according to claim 1, characterized in that: The spherical end cap (5) is made of bamboo woven material, and the spherical end cap (5) is glued to the front body (4).

3. The bamboo drone body structure of claim 1, wherein: Both the front section (4) and the rear section (2) are made by wrapping thin bamboo strips or weaving bamboo strips. The thickness of the thin bamboo strips is 0.1-0.4mm, and the width of the bamboo strips is 2-10mm.

4. The bamboo drone body structure of claim 3, wherein: The front section of the fuselage (4) is embedded in the rear section of the fuselage (2) and connected by adhesive bonding.

5. The bamboo drone body structure of claim 1, wherein: The rear fuselage (2) is connected to the upper cover plate (6) and the lower cover plate (7) by quick-release bolts.

6. The bamboo drone body structure of claim 1, wherein: Both the upper cover plate (6) and the lower cover plate (7) are made of bamboo strips, and at least two layers of woven bamboo strips are laid.

7. The bamboo drone body structure of claim 1, wherein: The tail beam (3) is made of hollow bamboo tube or with carbon fiber tube as the core layer and bamboo fiber or bamboo strips wrapped around it. The width of the bamboo strips is 2-10mm.

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