CN219029788U

CN219029788U - Light elevator

Info

Publication number: CN219029788U
Application number: CN202223376927.4U
Authority: CN
Inventors: 王玉凯; 李四杰; 张佳卫; 涂尚平; 侯伟
Original assignee: Changzhou Qifu Antai Composite Technology Co ltd
Current assignee: Changzhou Qifu Antai Composite Technology Co ltd
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-05-16
Anticipated expiration: 2032-12-14

Abstract

The utility model belongs to the technical field of solar unmanned aerial vehicles, and particularly relates to a light elevator, which comprises a main beam, a rear edge, a plurality of straight ribs and a plurality of inclined ribs, wherein the main beam, the rear edge, the straight ribs and the inclined ribs are all made of carbon fiber foam sandwich composite materials, the front ends of the straight ribs and the inclined ribs are fixedly connected with the main beam, the tail ends of the straight ribs and the inclined ribs are fixedly connected with the rear edge, the plurality of straight ribs are sequentially arranged at intervals along the length direction of the main beam, the inclined ribs and the straight ribs are arranged at intervals, the main beam, the straight ribs, the inclined ribs and the rear edge integrally form an elevator framework, and the elevator framework is streamline; at least three groups of hinge joints are arranged on the main beam along the length direction of the main beam, a support arm is connected to one hinge joint positioned in the middle of the main beam, and an operating connecting rod is hinged to the support arm. The light elevator ensures the structural strength and rigidity, simultaneously has light overall mass, meets the requirement of light weight of the solar unmanned aerial vehicle, and has a small number of integral structural members and convenient assembly.

Description

Light elevator

Technical Field

The utility model belongs to the technical field of solar unmanned aerial vehicles, and particularly relates to a light elevator.

Background

The solar unmanned aerial vehicle is an unmanned aerial vehicle which uses solar radiation energy as power, and converts solar energy into electric energy by using a photovoltaic cell, and the motor drives the propeller to rotate to generate flying power. The elevator is a control surface for controlling the unmanned aerial vehicle to lift, and the elevator in the horizontal tail wing can act when the unmanned aerial vehicle needs to be controlled to lift or lower the head. The elevator is a steerable airfoil portion of the horizontal tail that functions to pitch maneuver the unmanned aerial vehicle.

The solar unmanned aerial vehicle is required to realize ultra-light structural design, namely the weight is required to be the lightest on the premise of meeting the structural strength and rigidity requirements; the traditional elevator framework mainly comprising a solid carbon fiber structure is heavy, and the ultra-light structure requirement of the solar unmanned aerial vehicle is difficult to meet, so that the optimization of the elevator of the solar unmanned aerial vehicle has a profound effect.

Disclosure of Invention

The utility model provides a light elevator, which aims to solve the problems that in the prior art, the weight of an elevator framework mainly comprising a solid carbon fiber structure is large and the requirement of an ultra-light structure of a solar unmanned aerial vehicle is difficult to meet.

In order to solve the technical problems, the technical scheme adopted by the utility model is that the light elevator comprises a main beam, a rear edge, a plurality of straight ribs and a plurality of inclined ribs, wherein the main beam, the rear edge, the straight ribs and the inclined ribs are all made of carbon fiber foam sandwich composite materials, the front ends of the straight ribs and the inclined ribs are fixedly connected with the main beam, the tail ends of the straight ribs and the inclined ribs are fixedly connected with the rear edge, the plurality of straight ribs are sequentially arranged at intervals along the length direction of the main beam, the inclined ribs and the straight ribs are arranged at intervals, the main beam, the straight ribs, the inclined ribs and the rear edge integrally form an elevator framework, and the elevator framework is streamline; at least three groups of hinge joints are arranged on the main beam along the length direction of the main beam, a support arm is connected to one hinge joint positioned in the middle of the main beam, and an operating connecting rod is hinged to the support arm.

Preferably, every two inclined ribs are arranged in a crossing way, and clamping grooves are formed in the crossing parts of every two inclined ribs and are fixed through gluing; the rear edge is also provided with a clamping groove, and the tail end of the straight rib is fixedly glued with the corresponding clamping groove. The clamping groove is convenient for the accurate installation location of straight rib and oblique rib, and increases the cementing area, improves joint strength by a wide margin.

Further, a group of inclined ribs which are arranged in a crossing way are arranged between every two adjacent straight ribs. The oblique ribs which are arranged in a crossed way are ensured to greatly improve the reliability and the stability of the elevator framework.

Further, a corner piece is arranged between the straight rib and the main beam, and the corner piece is respectively fixed with the main beam and the straight rib in a gluing way; corner pieces are arranged between the inclined ribs and the straight ribs, and the corner pieces are respectively fixed with the inclined ribs and the straight ribs in a gluing way; the corner pieces are of carbon fiber laminated board structures. The angle of the corner piece is selected according to the actual use scene, the glue joint area of the corner piece is greatly increased, and the connection strength is improved.

Preferably, the main beam, the rear edge, the straight ribs and the inclined ribs are provided with lightening holes, and the straight ribs positioned at the two ends of the main beam are complete sealing surfaces. The actual shape, position and size of the lightening hole are determined through the analysis of the stress and numerical values, and redundant materials are removed while the rigidity is ensured, so that the minimum quality is ensured.

As the preference, hinge joint department atress is great, for the structural strength who guarantees this position, hinge joint's base is except through gluing and girder fixed connection, just hinge joint's base still passes through bolt and girder fixed connection, it has the reinforcing plate to glue on the girder, hinge joint's base and reinforcing plate are located the both sides of girder, just reinforcing plate and the relative setting in position of bolt to ensure joint strength.

Preferably, the front end of the main beam is provided with a front edge, the front end of the front edge is arc-shaped, the rear end of the front edge is hollowed out, and the rear end of the front edge is fixed with the front end of the main beam in a gluing way. The front edge keeps the aerodynamic shape of the elevator while the elevator rotates up and down, and the smooth passage of air flow is ensured in the rotating process.

Further, the material of the front edge is a glass fiber foam sandwich composite material. Compared with the carbon fiber foam sandwich composite material, the composite material has better shock resistance, so that the front edge can resist the impact of foreign matters.

Further, the front edge comprises a foam sandwich layer and a glass fiber layer wrapping the foam sandwich layer; the main beam, the rear edge, the straight rib and the inclined rib all comprise a foam sandwich layer and at least one carbon fiber layer wrapped outside the foam sandwich layer. The number of layers of the glass fiber layer and the carbon fiber layer is determined through the stress magnitude and numerical analysis, so that the rigidity of each structure is ensured.

Further, the upper surface and the lower surface of the elevator framework are both coated with a skin, or only the lower surface of the elevator framework is coated with a skin, the skin is a single-layer composite material laminated board or a polycarbonate film, and a solar panel can be arranged on the upper surface of the elevator. The elevator framework maintains the appearance of the skin, the stability of the elevator is improved, and the skin maintains the appearance of the aircraft, so that the aircraft has good aerodynamic characteristics.

The beneficial effects are that: the light elevator meets the light requirement of the solar unmanned aerial vehicle, integrally utilizes the carbon fiber foam sandwich composite material, is provided with the lightening holes, ensures the structural strength and rigidity, and has light overall mass and high structural efficiency; the foam sandwich has extremely strong vibration absorption and vibration resistance, and can absorb and dissipate most of vibration and impact energy; the foam sandwich has good elastic performance and tensile and compressive capacities, and can ensure that the influence on the solar panel is extremely small when the control surface is deformed, so as to ensure the tight combination of the solar panel and the light elevator, synchronously improve the strength and the rigidity of the unmanned aerial vehicle, strengthen the comprehensive structural capacity of the machine body and prolong the service life of the unmanned aerial vehicle; the number of the integral structural members is small, most of the components are assembled in a gluing way, the gluing is firm, and the production efficiency is greatly improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a lightweight elevator of the present utility model;

FIG. 2 is an enlarged schematic view of a portion of FIG. 1A;

FIG. 3 is a schematic view of another angular perspective of the lightweight elevator of the present utility model;

FIG. 4 is an enlarged partial schematic view of B in FIG. 3;

in the figure: 1. the main beam comprises a main beam body, 1-1 parts of weight reducing holes, 2 parts of rear edges, 3 parts of straight ribs, 4 parts of inclined ribs, 5 parts of hinged joints, 6 parts of supporting arms, 7 parts of operating connecting rods, 8 parts of corner pieces, 9 parts of reinforcing pieces, 10 parts of bolts, 11 parts of front edges.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

As shown in fig. 1 to 4, a light elevator comprises a main beam 1, a rear edge 2, a plurality of straight ribs 3 and a plurality of inclined ribs 4, wherein the main beam 1, the rear edge 2, the straight ribs 3 and the inclined ribs 4 are all made of carbon fiber foam sandwich composite materials, the front ends of the straight ribs 3 and the inclined ribs 4 are fixedly connected with the main beam 1, the tail ends of the straight ribs 3 and the inclined ribs 4 are fixedly connected with the rear edge 2, a plurality of straight ribs 3 are sequentially arranged at intervals along the length direction of the main beam 1, the inclined ribs 4 and the straight ribs 3 are arranged at intervals, the main beam 1, the straight ribs 3, the inclined ribs 4 and the rear edge 2 integrally form an elevator framework, and the elevator framework is streamline; at least three groups of hinge joints 5 are arranged on the main beam 1 along the length direction of the main beam, three groups of hinge joints 5 are arranged in the embodiment, one hinge joint 5 positioned in the middle of the main beam 1 is connected with a support arm 6, and the support arm 6 is hinged with a control connecting rod 7.

In order to improve the overall connection strength of the elevator and ensure that the connection structure is simple and convenient, in the embodiment, every two inclined ribs 4 are arranged in a crossing way, and the crossing part of every two inclined ribs 4 is provided with a clamping groove and is fixed through cementing; a group of inclined ribs 4 which are arranged in a crossing way are arranged between every two adjacent straight ribs 3; the rear edge 2 is also provided with a clamping groove, and the tail end of the straight rib 3 is fixedly bonded with the corresponding clamping groove; a corner piece 8 is arranged between the straight rib 3 and the main beam 1, and the corner piece 8 is respectively fixed with the main beam 1 and the straight rib 3 in a gluing way; corner pieces 8 are also arranged between the inclined ribs 4 and the straight ribs 3, and the corner pieces 8 are respectively fixed with the inclined ribs 4 and the straight ribs 3 in a gluing way; the corner pieces 8 are of carbon fiber laminated board structures; the base of the hinge joint 5 is fixedly connected with the main beam 1 through gluing, the base of the hinge joint 5 is fixedly connected with the main beam 1 through bolts 10, the main beam 1 is glued with reinforcing sheets 9, the base of the hinge joint 5 and the reinforcing sheets 9 are positioned on two sides of the main beam 1, and the positions of the reinforcing sheets 9 and the bolts 10 are opposite.

In order to ensure the rigidity of the elevator framework and the lightest weight, in the embodiment, the girder 1, the rear edge 2, the straight ribs 3 and the inclined ribs 4 are provided with lightening holes 1-1, and the straight ribs 3 positioned at the two ends of the girder 1 are complete sealing surfaces; the girder 1, trailing edge 2, straight rib 3 and diagonal rib 4 all include PMI foam sandwich layer and parcel at the outside at least one deck carbon fiber shop floor of PMI foam sandwich layer, confirm the number of piles of glass fiber shop floor and carbon fiber shop floor through atress size and numerical analysis, the carbon fiber shop floor of girder 1 of this embodiment sets up two-layer, the carbon fiber shop floor of straight rib 3 and diagonal rib 4 all sets up one deck, the anterior and the carbon fiber shop floor at rear portion of trailing edge 2 all set up two-layer, the carbon fiber shop floor at the middle part of trailing edge 2 all sets up one deck, and the lightening hole of trailing edge 2 is seted up at the middle part of trailing edge 2.

In order to ensure the stability of the aerodynamic shape of the light elevator, in this embodiment, the front end of the main beam 1 is provided with a front edge 11, the front end of the front edge 11 is arc-shaped, the rear end of the front edge 11 is hollowed out to be reset, the rear end of the front edge 11 is glued and fixed with the front end of the main beam 1, the material of the front edge 11 in this embodiment is a glass fiber foam sandwich composite material, and the specific front edge 11 comprises a PMI foam sandwich layer and a layer of glass fiber layer wrapped outside the PMI foam sandwich layer, so that the front edge 11 has better shock resistance performance compared with the carbon fiber foam sandwich composite material, and can resist the impact of foreign matters; the upper surface and the lower surface of the elevator framework are both coated with a skin (not shown in the figure), or only the lower surface of the elevator framework is coated with the skin, the skin is a single-layer composite material laminated board or a high-strength ultrathin polycarbonate film, a solar cell panel (not shown in the figure) can be arranged on the upper surface of the elevator, the elevator framework maintains the appearance of the skin, and the skin maintains the appearance of an airplane, so that the aircraft has good aerodynamic characteristics.

The light elevator is assembled as follows:

the method comprises the steps of sequentially bonding three hinged joints 5 and connecting the three hinged joints on a main beam 1 through bolts 10, fixing a support arm 6 on one hinged joint 5 in the middle, inserting one end of a straight rib 3 into a clamping groove corresponding to a rear edge 2 and fixing the straight rib in a gluing mode, fixing the other end of the straight rib 3 with the main beam 1 in a gluing mode through a corner piece 8, sequentially arranging a plurality of straight ribs 3 at intervals along the length direction of the main beam 1, then cross-connecting two inclined ribs 4 in the corresponding clamping groove in a gluing mode, fixing two ends of the cross-fixed inclined ribs 4 with the main beam 1 and the rear edge 2 in a gluing mode through corner pieces 8, arranging a group of cross-fixed inclined ribs 4 between every two adjacent straight ribs 3, enabling the straight ribs 3 at two ends of the main beam 1 to be a complete sealing surface without lightening holes 1-1, gluing a front edge 11 to be fixed at the front end of the main beam 1, coating, mounting battery pieces on the upper surface of the light elevator, and hinging a control connecting rod 7 on the support arm 6.

The present utility model is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present utility model and the inventive concept thereof, can be replaced or changed within the scope of the present utility model.

Claims

1. A light elevator, characterized by: the elevator comprises a main beam (1), a rear edge (2), a plurality of straight ribs (3) and a plurality of inclined ribs (4), wherein the main beam (1), the rear edge (2), the straight ribs (3) and the inclined ribs (4) are made of carbon fiber foam sandwich composite materials, the front ends of the straight ribs (3) and the inclined ribs (4) are fixedly connected with the main beam (1), the tail ends of the straight ribs (3) and the inclined ribs (4) are fixedly connected with the rear edge (2), a plurality of straight ribs (3) are sequentially arranged at intervals along the length direction of the main beam (1), the inclined ribs (4) and the straight ribs (3) are arranged at intervals, the main beam (1), the straight ribs (3), the inclined ribs (4) and the rear edge (2) integrally form an elevator framework, and the elevator framework is streamline; at least three groups of hinge joints (5) are arranged on the main beam (1) along the length direction of the main beam, a support arm (6) is connected to one hinge joint (5) positioned in the middle of the main beam (1), and a control connecting rod (7) is hinged to the support arm (6).

2. The light weight elevator of claim 1, wherein: every two inclined ribs (4) are arranged in a crossing way, and clamping grooves are formed at the crossing part of each two inclined ribs (4) and are fixed through cementing; the rear edge (2) is also provided with a clamping groove, and the tail end of the straight rib (3) is fixedly glued with the corresponding clamping groove.

3. The light weight elevator of claim 2, wherein: a group of inclined ribs (4) which are arranged in a crossing way are arranged between every two adjacent straight ribs (3).

4. A lightweight elevator according to claim 3, characterized in that: an angle piece (8) is arranged between the straight rib (3) and the main beam (1), and the angle piece (8) is respectively fixed with the main beam (1) and the straight rib (3) in a gluing way; corner pieces (8) are also arranged between the inclined ribs (4) and the straight ribs (3), and the corner pieces (8) are respectively fixed with the inclined ribs (4) and the straight ribs (3) in a gluing way; the corner pieces (8) are of carbon fiber laminated board structures.

5. The light weight elevator of claim 1, wherein: weight reducing holes (1-1) are formed in the main beam (1), the rear edge (2), the straight ribs (3) and the inclined ribs (4), and the straight ribs (3) at two ends of the main beam (1) are complete sealing surfaces.

6. The light weight elevator of claim 1, wherein: the base of articulated joint (5) is through gluing and girder (1) fixed connection, just the base of articulated joint (5) still passes through bolt (10) and girder (1) fixed connection, it has reinforcing sheet (9) to glue on girder (1), the base of articulated joint (5) and reinforcing sheet (9) are located the both sides of girder (1), just reinforcing sheet (9) are relative with the position of bolt (10) setting.

7. The light weight elevator according to any of claims 1-6, wherein: the front end of the main beam (1) is provided with a front edge (11), the front end of the front edge (11) is arc-shaped, the rear end of the front edge (11) is hollowed out, and the rear end of the front edge (11) is fixedly glued with the front end of the main beam (1).

8. The light weight elevator of claim 7, wherein: the material of the front edge (11) is a glass fiber foam sandwich composite material.

9. The light weight elevator of claim 8, wherein: the front edge (11) comprises a foam sandwich layer and a glass fiber layer wrapping the outer part of the foam sandwich layer; the main beam (1), the rear edge (2), the straight rib (3) and the inclined rib (4) comprise a foam sandwich layer and at least one carbon fiber layer wrapping the outer part of the foam sandwich layer.

10. The light weight elevator of claim 1, wherein: the upper surface and the lower surface of the elevator framework are both coated with the skin, or only the lower surface of the elevator framework is coated with the skin, the skin is a single-layer composite material laminated board or a polycarbonate film, and the upper surface of the elevator can be provided with a solar panel.