WO2020019629A1

WO2020019629A1 - Truss-type unmanned aerial vehicle frame and unmanned aerial vehicle

Info

Publication number: WO2020019629A1
Application number: PCT/CN2018/120461
Authority: WO
Inventors: 毛越东; 朱家乐; 付维
Original assignee: 深圳高科新农技术有限公司
Priority date: 2018-07-25
Filing date: 2018-12-12
Publication date: 2020-01-30
Also published as: CN108860562A

Abstract

A truss-type unmanned aerial vehicle frame (1) and an unmanned aerial vehicle. The vehicle frame (1) comprises a plurality of arms (11) and an intermediate connection member (12). The intermediate connection member (12) comprises a plurality of connectors (121). The arm (11) is fixedly connected to the connector (121). The unmanned aerial vehicle frame uses a truss-type structure, has stable structural strength, is light weight, and mainly relies on the intermediate connection member for anti-torsion strength instead of relying on a vehicle body. The intermediate connection member can be made of high-strength aerospace aluminum material, and is characterized by high strength and light weight. The unmanned aerial vehicle provided with the truss-type aerial vehicle frame has great overall strength, upgraded anti-torsion strength, lighter weight, and conforms to the design trends of unmanned aerial vehicles.

Description

Truss type drone frame and drone

Technical field

The invention relates to the technical field of plant protection drones, in particular to a truss type drone frame and a drone.

Background technique

In the prior art, a multi-rotor drone generally includes an airframe and an airframe, and the airframe includes a top plate and a bottom plate. The airframe is clamped between the top plate and the bottom plate. The strength and anti-rotation ability of the drone mainly depend on the airframe and the arm. To ensure the strength, so the body is made thicker, which increases the weight of the drone. For example, the patent number is 201720313369.7, and the Chinese utility model named a multi-rotor drone discloses a six-rotor drone. Since the second arm and the third arm are connected to the first arm, When the lift of the rotors on the second and third arms changes, when the imbalance occurs, the first arm will generate a very large torsional force. If the strength of the body is insufficient, or the strength of the connection between the body and the first arm is insufficient , The drone will be twisted and deformed, which seriously affects the flying attitude and flight control, and even crashes, which needs to be improved.

Summary of the Invention

The object of the present invention is to provide a truss type drone frame and a drone with high structural strength and strong anti-torsion capability.

The technical solution provided by the present invention is: a truss-type drone frame, comprising a plurality of arms and an intermediate connector, the intermediate connector includes a plurality of connectors, and the arms are fixedly connected to the connectors.

Wherein, the machine arm includes a main arm and a support arm, the inner end of the main arm is fixedly connected to the connector of the intermediate connector, and the outer end of the main arm is fixedly connected to the two support arms through a three-way connection. The outer ends of the two arms are used to fix the rotor.

The main arm includes an inner round pipe and an outer square pipe, and the four side walls of the inner round pipe and the outer square pipe have connection points.

Wherein, the arm is an elliptical tube, and a folding joint is provided between the arm and the tee connector, and can be folded downward.

Another technical solution provided by the present invention is: an unmanned aerial vehicle, including the truss-type unmanned aerial vehicle frame described above.

Wherein, the drone further includes a body and a U-shaped fixing member, the body includes a bottom plate and a side wall, the arm is wrapped by the U-shaped fixing member and fixed on the bottom plate, and the structure of the U-shaped fixing member Similar to a truss structure, it has a structural enhancement function, and the U-shaped fixing member is riveted or screwed to the bottom plate.

Wherein, the drone further includes a foot stand, the arm, the bottom plate and the stand are provided with screw holes, and the screws pass through the screw holes on the arm, the bottom plate and the stand at the same time. The tripod is fixed in one piece.

Wherein, the UAV includes a material box, and the material box and the screw are connected by a quick release self-locking device.

Wherein, the quick-release self-locking device includes a lock part and a lock tongue ring part, and the lock tongue on the top of the lock ring part is inserted into the lock part to realize self-locking. The lock part and the lock ring part Installed on the material box and screws.

Wherein, the number of the main arms is three, three connectors are provided on the intermediate connector, the included angle of the adjacent connectors is 120 degrees, and the number of the arms is six, forming a three-axis six-rotor structure. The tripod is a triangular angle bracket, and the three connection heads are all hollow structures.

The beneficial effect of the present invention is that the UAV frame includes multiple arms and intermediate connectors, the intermediate connectors include multiple connectors, the arms are fixedly connected to the connectors, and a truss structure is adopted The structure is stable and high in strength and light in weight. The anti-twisting ability no longer depends on the body, but mainly on the intermediate connector. The intermediate connector can be made of high-strength aviation aluminum material, which has the characteristics of high strength and light weight. The overall strength of the drone adopting the truss type drone frame is high, the anti-rotation ability is greatly improved, and the weight is lighter, which is in line with the design trend of the drone.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic front perspective view of an embodiment of a drone according to the present invention;

FIG. 2 is a schematic rear perspective view of an embodiment of the drone according to the present invention; FIG.

3 is a schematic structural diagram of a frame and a body according to the present invention;

FIG. 4 is an enlarged view of A in FIG. 3; FIG.

5 is a schematic structural diagram of an intermediate connecting member according to the present invention;

6 is a schematic structural diagram of an arm according to the present invention;

7 is a schematic structural diagram of a main arm according to the present invention;

8 is a schematic structural diagram of a material box according to the present invention;

9 is a schematic structural diagram of a quick release self-locking device according to the present invention;

FIG. 10 is a schematic structural diagram of a tripod according to the present invention.

Among them, 1, frame; 11, machine arm; 111, main arm; 112, internal round tube; 113, external square tube; 114, connection point; 115, support arm; 116, folding joint; 117, three-way connector ; 12.Intermediate connecting pieces; 121.Connector; 2.Rotor; 3.Body; 31.Bottom plate; 32.Side wall; 4.U-shaped fixing pieces; 5.Tripod; 6.Material box; 7.Quick release Self-locking device; 71. Lock head component; 72. Lock tongue ring component; 8. Screw.

detailed description

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

As an embodiment of the drone and truss-type drone frame according to the present invention, as shown in FIG. 1 to FIG. 10, the drone includes a truss-type drone frame 1, and the truss-type unmanned The machine frame 1 includes a plurality of machine arms 11 and an intermediate connection piece 12. The intermediate connection piece 12 includes a plurality of connection heads 121. The machine arm 11 is fixedly connected to the connection heads 121.

The UAV frame adopts a truss structure, with high structural stability and strength, light weight, and the ability to resist torsion no longer depends on the body 3, but mainly on the intermediate connector 12, which can use high-strength aviation aluminum. Made of material with high strength and light weight. The overall strength of the drone adopting the truss type drone frame is high, the anti-rotation ability is greatly improved, and the weight is lighter, which is in line with the design trend of the drone.

In this embodiment, the drone further includes a body 3 and a U-shaped fixing member 4. The body 3 includes a bottom plate 31 and a side wall 32, and the arm 11 is wrapped by the U-shaped fixing member 4 and fixed on the bottom plate. On 31, the U-shaped fixing member 4 and the bottom plate 31 are riveted or screwed. The U-shaped fixing member 4 is long in length and can be fixed with multiple screws or rivets. The fixing of the arm 11 and the bottom plate 31 is more stable and firm. The structure of the U-shaped fixing member 4 is similar to a truss structure and has a structural enhancement function. The drone further includes a stand 5, the arm 11, the bottom plate 31 and the stand 5 are provided with screw holes, and the screws 8 pass through the screw holes on the arm 11, the bottom plate 31 and the stand 5 at the same time, The arm 11, the bottom plate 31 and the tripod 5 are fixed together. Both the body 3 and the tripod 5 can increase the strength of the frame 1 and supplement the strength, further increasing the torsion resistance of the frame 1; a screw 8 can simultaneously fix the arm 11, the bottom plate 31 and the tripod 5, It is the lightest weight design and minimizes the weight of the drone.

In this embodiment, the bottom plate 31 is made of an aluminum plate and a carbon fiber plate by bonding and compounding, and the strength and toughness are comprehensively adjusted without having to excessively pursue rigidity and strength.

In this embodiment, the tripod 5 is composed of three elastic supporting feet made of carbon fiber board, and the lower end of the elastic supporting feet is bent outward to increase the contact area with the ground. The upper end of the elastic support foot is further provided with a horizontal portion, and the horizontal portions of the three elastic support feet are fixedly connected, and the elastic support foot is easier to install and has good stability.

Drone material boxes are generally divided into three types, one is a liquid material box, the other is a granular material box, and the third is a powder material box. In the prior art, the material box is installed on the drone by a screw installation method. According to the actual work tasks, the material box is replaced. The screw installation requires tools, which is troublesome, and the accessories are easily lost after disassembly.

In this embodiment, the drone includes a material box 6, and the material box 6 and the screw 8 are connected by a quick-release self-locking device 7. The material box 6 can be quickly disassembled, no tools are needed, no parts are lost, and the problem of quickly changing the material box is solved; moreover, when the material box 6 is connected to the drone, the above-mentioned screws 8 are still used to reduce the weight of the design Be extreme. As a specific embodiment of the quick-release self-locking device 7, as shown in FIG. 9, the quick-release self-locking device 7 includes a lock member 71 and a tongue ring member 72, and a lock on the top of the tongue ring member 72 The tongue is inserted into the lock head part 71 to realize self-locking, and the lock head part 71 and the lock tongue ring part 72 are respectively installed on the material box 6 and the screw 8.

In this embodiment, as shown in FIG. 3, the machine arm 11 includes a main arm 111 and a support arm 115. The inner end of the main arm 111 is fixedly connected to the connector 121 of the intermediate connector 12. The two ends are fixedly connected to two support arms 115 through a three-way connecting member 117, and the outer ends of the two support arms 115 are used for fixing the rotor 2. The number of the main arms 111 is three. The middle connector 12 is provided with three connectors 121, which can also be called three-way connectors. The angle between the adjacent connectors 121 is 120 degrees, and the arm 115 There are six, forming a three-axis six-rotor structure, the tripod 5 is a triangular angle bracket, the three connectors 121 are hollow structures, which can be laid with avionics cables, and the middle part of the middle connector 12 is a triangular structure, which is stable Good performance, high strength and strong torsion resistance.

Of course, the UAV may also be a four-axis eight-rotor structure, a six-axis twelve-rotor structure, or even more rotor structures.

In this embodiment, as shown in FIG. 7, the main arm 111 includes an inner round pipe 112 and an outer square pipe 113. The four side walls of the inner round pipe 112 and the outer square pipe 113 have connection points 114. The round tube has the strongest torsion resistance, and the square tube has strong bending resistance. The round tube, the square tube and the connection point form four small near-triangular structures. The structure is the most stable. The main arm 111 adopts the inner circular tube 112 and the outer square. The way the tube 113 is combined has perfect performance in bending resistance and torsion resistance. At the same strength, the main boom with a composite structure is lighter than the main boom with a single solution. The main arm can be manufactured by an extrusion molding process.

In this embodiment, the support arm 115 is an elliptical tube, and the support arm 115 mainly bears the upward and downward bending forces, and at the same time assumes the function of horizontal positioning of the rotor 2. The use of an elliptical tube is a relatively preferred solution. A folding joint 116 is provided between the arm 115 and the three-way connecting piece 117, and can be folded downward. The volume becomes smaller after folding, which is convenient for transfer and transportation.

The above description is only the preferred embodiments of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection of the present invention. Within range.

Claims

The utility model relates to a truss-type drone frame, which is characterized in that it comprises a plurality of arms and an intermediate connector. The intermediate connector includes a plurality of connectors. The arms are fixedly connected to the connectors.
The truss-type drone frame according to claim 1, wherein the arm comprises a main arm and a support arm, an inner end of the main arm is fixedly connected with a connector of an intermediate connector, and an outer side of the main arm The two ends are fixedly connected to two arms through a three-way connection, and the outer ends of the two arms are used to fix the rotor.
The truss-type drone frame according to claim 2, wherein the main arm comprises an inner round pipe and an outer square pipe, and the four side walls of the inner round pipe and the outer square pipe have connection points.
The truss-type drone frame according to claim 2, wherein the support arm is an oval tube, and a folding joint is provided between the support arm and the tee connection member and can be folded downward.
A drone comprising a truss type drone frame according to any one of claims 1 to 4.
The drone according to claim 5, wherein the drone further comprises a body and a U-shaped fixing member, the body includes a bottom plate and a side wall, and the arm is wrapped and fixed by the U-shaped fixing member On the bottom plate, the U-shaped fixing member is riveted or screwed to the bottom plate.
The drone according to claim 6, characterized in that the drone further comprises a tripod, the arm, the bottom plate and the tripod are provided with screw holes, and the screws pass through the arm, the bottom plate and The screw holes on the tripod fix the arm, the bottom plate and the tripod as a whole.
The drone according to claim 7, wherein the drone comprises a material box, and the material box and the screw are connected by a quick-release self-locking device.
The drone according to claim 8, wherein the quick-release self-locking device comprises a lock part and a lock tongue ring part, and the lock tongue on the top of the lock ring part is inserted into the lock part to realize self-locking. For a lock, the lock head part and the bolt tongue ring part are respectively installed on a material box and a screw.
The drone according to claim 7, characterized in that the number of the main arms is three, three connectors are provided on the intermediate connector, and the included angle of the adjacent connectors is 120 degrees, and the support There are six arms, forming a triaxial six-rotor structure, the tripod is a triangular angle bracket, and the three connectors are hollow structures.