CN212637901U

CN212637901U - Flapping wing aircraft

Info

Publication number: CN212637901U
Application number: CN202020484373.1U
Authority: CN
Inventors: 罗仁伦; 李娜
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2021-03-02
Anticipated expiration: 2030-04-03

Abstract

The utility model relates to the field of aircrafts, in particular to a flapping wing aircraft, which comprises a first flapping wing, wherein the first flapping wing comprises a first support frame and a first skin; the first support frame is of a breathable structure; the middle part or one edge of the first skin is fixed with the bottom of the first support frame; in the flapping process, two ends of the first skin are perpendicular to the first support frame so as to reduce air resistance; during descent, the first skin is fully deployed to cover the first support frame to increase upward drag, thereby reducing the distance the aircraft descends. The first skin can contract and expand rapidly under the action of wind during ascent and descent, thereby maximally reducing resistance during ascent.

Description

Flapping wing aircraft

Technical Field

The utility model relates to an aircraft field, concretely relates to flapping wing aircraft.

Background

The flapping wing aircraft is also called a flapping wing aircraft, and refers to an aircraft with wings flapping up and down like wings of birds and insects and heavier than air, wherein the flapping wings not only generate a lifting force, but also generate a forward driving force. Modern flapping wing air vehicle is divided into bird-like flapping wings and insect-like flapping wings in principle, and takes a micro unmanned flapping wing as a main part. The flapping frequency of the bird-imitating flapping wings is low, the wing areas are large, the bird-imitating flapping wings are similar to birds to fly, and the manufacture is relatively easy; the insect-imitating flapping wing has high flapping frequency, small wing area and high manufacturing difficulty, but can conveniently realize hovering. The bionic ornithopter has great advantages in military and civil use and becomes a hot point of development.

The existing ornithopter slowly retracts when folding wings in the rising process and slowly expands in the descending process, so that the flapping frequency of the wings is reduced by overcoming the resistance of air in the folding or expanding process, and the flight performance of the ornithopter is limited.

Disclosure of Invention

The invention provides a flapping wing aircraft, aiming at the problem that the wings of the existing flapping wing aircraft cannot be folded or unfolded quickly in the ascending or descending process.

In order to achieve the above purpose, the invention provides the following technical scheme:

an ornithopter comprising: the flapping wing comprises a first flapping wing, a support and a first transmission structure, wherein the first flapping wing comprises a first support frame and a first skin; the first support frame is of a breathable net structure; the part of the first skin is fixed with the bottom of the first support frame; the first transmission structure is arranged on the support; the first transmission structure comprises a first transmission connecting rod, a second transmission connecting rod, a third transmission connecting rod and a first motor; the first motor is fixedly arranged on the support; an output shaft of the first motor is fixedly connected with one end of the first transmission connecting rod; the other end of the first transmission connecting rod is hinged with the second transmission connecting rod; the second transmission connecting rod is hinged with the third transmission connecting rod; the other end of the third transmission connecting rod is connected with the first support frame.

The first transmission structure transmits power to the first support frame through the first motor, the first transmission connecting rod, the second transmission connecting rod and the third transmission connecting rod, the first support frame is driven to move up and down through the rotation of the first motor, the wing vibration action is completed, and the structure is simple.

Preferably, the flapping wing air conditioner further comprises a second flapping wing, wherein the second flapping wing comprises a second support frame and a second skin; the bottom of the support is connected with the second support frame; the second skin is arranged at the bottom of the second support frame; and the middle part of the second skin is fixed with the bottom of the second support frame. The second flapping wing is arranged at the bottom of the support, the structure of the second flapping wing is consistent with that of the first flapping wing, and double lifting force can be provided for the flapping wing aircraft.

Preferably, the flapping wing aircraft further comprises a second transmission structure, wherein the second transmission structure comprises a fourth transmission connecting rod, a fifth transmission connecting rod, a sixth transmission connecting rod and a second motor; the second motor is fixedly arranged on the support; an output shaft of the second motor is fixedly connected with one end of the fourth transmission connecting rod; the other end of the fourth transmission connecting rod is hinged with the fifth transmission connecting rod; the fifth transmission connecting rod is hinged with one end of the sixth transmission connecting rod; the other end of the sixth transmission connecting rod is connected with the second supporting frame.

Preferably, the third transmission connecting rod and the sixth transmission connecting rod are fixed on the support through fixing rings. The third transmission connecting rod is fixed on the support through the fixing ring, and the third transmission connecting rod can only move up and down relative to the support.

Preferably, the third transmission connecting rod is fixed on the support through two fixing rings, and the sixth transmission connecting rod is fixed on the support through two fixing rings. The third transmission connecting rod and the sixth transmission connecting rod can be better fixed through the two fixing rings.

Compared with the prior art, the invention has the beneficial effects that: the application provides a flapping wing aircraft is at the ascending in-process, because the both ends of the first covering of wind effect are perpendicular with first support frame to the reduction resistance of maximize, first covering is unfolded completely and is covered first support frame in order to obtain the biggest lift completely at the in-process that rises. Because the first skin and the first support frame are partially fixed, the first skin can be rapidly contracted and expanded under the action of wind in the ascending and descending processes, and the resistance is maximally reduced in the ascending process, so that the flapping frequency is improved.

Description of the drawings:

FIG. 1 is a schematic illustration of a descent process of an ornithopter according to the present application;

FIG. 2 is a schematic structural view of the present application providing a lift sequence for an ornithopter;

FIG. 3 is a schematic representation of the present application providing a configuration of an ornithopter from ascent to descent;

FIG. 4 is a first embodiment of the flapping wing of FIG. 1;

FIG. 5 is a second embodiment of the flapping wing of FIG. 1;

FIG. 6 is a schematic diagram of a first transmission structure;

FIG. 7 is a front view of the flapping wing aircraft with multiple rows of skins during ascent.

The labels in the figure are: 1-a first flapping wing, 11-a first support frame, 12-a first skin, 2-a support, 21-a fixing ring, 3-a first transmission structure, 31-a first transmission connecting rod, 32-a second transmission connecting rod, 33-a third transmission connecting rod, 34-a first motor, 35-a first fixing plate, 4-a second flapping wing, 41-a second support frame, 42-a second skin, 5-a second transmission structure, 51-a fourth transmission connecting rod, 52-a fifth transmission connecting rod, 53-a sixth transmission connecting rod, 54-a second motor and 55-a second fixing plate.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, 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 for purposes of illustration only and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

As shown in fig. 1 to 6, the present application provides a flapping wing aircraft comprising a first flapping wing 1, a support 2, and a first transmission structure 3, the first flapping wing 1 comprising a first support frame 11 and a first skin 12. The first support frame 11 is of a breathable structure; the middle part of the first skin 12 is fixed with the bottom of a first support frame 11, and the first support frame 11 is connected with the first transmission structure 3; the first transmission structure 3 is arranged on the support 2, and the first transmission structure 3 is used for providing power for the first flapping wing 1.

The first skin 12 may also be composed of multiple skins, each of which may be disposed along the length or width direction of the first support frame 11, as shown in fig. 1, a middle portion of the first skin 12 is fixed to the middle portion of the first support frame 11 along the length direction of the first support frame 11 by glue or other fixing means, and the surface areas of the first support frame 11 and the first skin 12 are as large as each other. Of course, the first skin 12 may also be fixed to the edge of the first support frame 11 on one side. Similarly, the first skin 12 may be a plurality of skins juxtaposed along the length direction of the first support frame 11, or juxtaposed along the width direction of the first support frame 11.

During the flapping process, two ends of the first skin 12 are perpendicular to the first support frame 11 to reduce air resistance; during descent, the first skin 12 is fully deployed covering the first support frame 11 with an increased upward air resistance, thus reducing the distance of descent of the aircraft. Thereby making the aircraft fly like wings of birds. The first skin 12 may be fixed to the first support frame 11 at the middle portion, or one edge of the first skin 12 may be fixed to the first support frame 11.

The second flapping wing 4 is also arranged at the bottom of the support 2 for increasing the lifting force, the second flapping wing 4 comprises a second support frame 41 and a second skin 42, the second support frame 41 is also of a breathable structure like the first flapping wing 1, and the second flapping wing 4 comprises the second support frame 41 and the second skin 42; the bottom of the support 2 is fixedly connected with the second support frame 41; the second skin 42 is arranged at the bottom of the second support frame 41; the middle portion of the second skin 42 is fixed to the bottom portion of the second support bracket 41. A second transmission structure 5 is mounted on the support 2, the second transmission structure 5 being used for providing power for the second flapping wing 4.

The bottom of the support 2 passes through the second support frame 41 and is fixed with the second support frame 41 by means of nuts or welding and the like. The first support frame 11 and the second support frame 41 may be of a net structure, so that the wind may penetrate the first support frame 11 and the second support frame 41 to make the first skin 12 and the second skin 42 vertically downward under the action of the wind during the ascending process.

The first and

second skins

12, 42 may be made from a single piece and may be made from a cloth similar to that of a parachute canopy. In particular, the thickness of the first and

second skins

12, 42 may be increased as the weight of the aircraft increases. The middle parts of the first skin 12 and the second skin 42 are fixed with the first support frame 11 and the second support frame 41 by glue or fine iron wires or other methods along the length direction or the width direction of the first support frame 11 and the second support frame 41, so that the rest parts of the first skin 12 except the part fixed with the first support frame 11 are vertically drooping, and the rest parts of the second skin 42 except the part fixed with the second support frame 41 are vertically drooping during the ascending process of the aircraft. The first skin 12 and the second skin 42 may also be composed of multiple pieces, corresponding to a monolithic center divided into multiple pieces. The direction of the first skin 12 may be arranged along the width direction of the first support frame 11, and then a plurality of rows of the first skin are provided; similarly, the direction of the second skin 42 may be arranged along the width direction of the second support frame 41, and then a plurality of rows of the second skin are provided. As shown in fig. 6, the first transmission structure 3 comprises a first transmission connecting rod 31, a second transmission connecting rod 32, a third transmission connecting rod 33 and a first motor 34; the first motor 34 is fixedly mounted on the support 2 through a first fixing plate 35; an output shaft of the first motor 34 penetrates through the support 2 to be fixedly connected with one end of the first transmission connecting rod 31, and the other end of the first transmission connecting rod 31 is hinged with the second transmission connecting rod 32. The second transmission connecting rod 32 is fixed with the first transmission connecting rod 31 in a welding mode, and the first transmission connecting rod 31 drives the second transmission connecting rod 32 to rotate when moving up and down.

The second transmission connecting rod 32 is hinged with the third transmission connecting rod 33; the third transmission connecting rod 33 is connected with the first support frame 11. Two fixing rings 21 are welded on the support 2, the third transmission connecting rod 33 passes through the fixing rings 21, and the position of the third transmission connecting rod 33 is limited by the fixing rings 21.

The second transmission structure 5 comprises a fourth transmission connecting rod 51, a fifth transmission connecting rod 52, a sixth transmission connecting rod 53 and a second motor 54; the second motor 54 is fixedly mounted on the support 2 through a second fixing plate 55; an output shaft of the second motor 54 penetrates through the support 2 and is fixedly connected with one end of the fourth transmission connecting rod 51, and the other end of the fourth transmission connecting rod 51 is hinged with the fifth transmission connecting rod 52. The fifth transmission connecting rod 52 and the fourth transmission connecting rod 51 are fixed in a welding mode, and the fourth transmission connecting rod 51 drives the fifth transmission connecting rod 52 to rotate when moving up and down.

The fifth transmission connecting rod 52 is hinged with the sixth transmission connecting rod 53; the sixth transmission connecting rod 53 is connected with the second support frame 41. Two fixing rings 21 are welded on the support 2, the sixth transmission connecting rod 53 penetrates through the fixing rings 21, and the position of the sixth transmission connecting rod 53 is limited by the fixing rings 21.

The rotation directions of the first motor 34 and the second motor 54 are the same, so that the directions of the first support frame 11 and the second support frame 41 are the same, that is, the second support frame 41 also rises when the first support frame 11 rises, and the second support frame 41 also falls when the first support frame 11 falls.

The working process is as follows: the first motor 34 rotates to drive the first transmission connecting rod 31 to do circular motion, the second transmission connecting rod 32 does circular motion along with the motion of the first transmission connecting rod 31, and the second transmission connecting rod 32 is hinged to the third transmission connecting rod 33, so that the third transmission connecting rod 33 moves up and down along with the motion of the second transmission connecting rod 32, and the third transmission connecting rod 33 drives the first support frame 11 to move up and down. The second motor 54 rotates to drive the fourth transmission connecting rod 51 to do circular motion, the fifth transmission connecting rod 52 does circular motion along with the motion of the fourth transmission connecting rod 51, and the fifth transmission connecting rod 52 is hinged to the sixth transmission connecting rod 53, so that the sixth transmission connecting rod 53 moves up and down along with the motion of the fifth transmission connecting rod 52, and the sixth transmission connecting rod 53 drives the second support frame 41 to move up and down. The rotation directions of the first motor 34 and the second motor 54 are consistent, so that the movement directions of the first support frame 11 and the second support frame 41 are consistent.

The part of the first skin 12 fixed with the first support bracket 11 is vertically downward and the part of the second skin 42 fixed with the second support bracket 41 is vertically downward during the ascending process, thereby reducing the resistance. In the descending process, the first support frame 11 blocks the first skin 12 so that the first skin 12 can be fully unfolded, the second support frame 41 blocks the second skin 42 so that the second skin 42 can be fully unfolded, and an upward force is applied to the aircraft in the descending process so that the descending distance of the aircraft is reduced. The ascending process is shown in fig. 2, 3 and 7, the first skin 12 and the second skin 42 are downward, and the first skin 12 and the second skin 42 in fig. 7 are moved in the direction of the arrows during the descending process, to block the first support frame 11 and the second support frame 41, respectively.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An ornithopter, comprising: the flapping wing comprises a first flapping wing (1), a support (2) and a first transmission structure (3), wherein the first flapping wing (1) comprises a first support frame (11) and a first skin (12); the first support frame (11) is of a breathable net structure; part of the first skin (12) is fixed with the bottom of the first support frame (11); the first transmission structure (3) is arranged on the support (2); the first transmission structure (3) comprises a first transmission connecting rod (31), a second transmission connecting rod (32), a third transmission connecting rod (33) and a first motor (34); the first motor (34) is fixedly arranged on the support (2); an output shaft of the first motor (34) is fixedly connected with one end of the first transmission connecting rod (31); the other end of the first transmission connecting rod (31) is hinged with the second transmission connecting rod (32); the second transmission connecting rod (32) is hinged with one end of the third transmission connecting rod (33); the other end of the third transmission connecting rod (33) is connected with the first support frame (11).

2. The ornithopter according to claim 1, further comprising a second ornithopter (4), the second ornithopter (4) comprising a second support frame (41) and a second skin (42); the bottom of the support (2) is connected with the second support frame (41); the bottom of the second supporting frame (41) is provided with the second skin (42); and part of the second skin (42) is fixed with the bottom of the second support frame (41).

3. The ornithopter according to claim 2, further comprising a second transmission structure (5), the second transmission structure (5) comprising a fourth transmission connecting rod (51), a fifth transmission connecting rod (52), a sixth transmission connecting rod (53) and a second motor (54); the second motor (54) is fixedly arranged on the support (2); an output shaft of the second motor (54) is fixedly connected with one end of the fourth transmission connecting rod (51); the other end of the fourth transmission connecting rod (51) is hinged with the fifth transmission connecting rod (52); the fifth transmission connecting rod (52) is hinged with one end of the sixth transmission connecting rod (53); the other end of the sixth transmission connecting rod (53) is connected with the second supporting frame (41).

4. The ornithopter according to claim 3, characterized in that the third transmission connecting rod (33) and the sixth transmission connecting rod (53) are both fixed to the support (2) by means of a fixing ring (21).

5. The ornithopter according to claim 4, characterized in that the third transmission connecting rod (33) is fixed to the support (2) by means of two fixing rings (21), and the sixth transmission connecting rod (53) is fixed to the support (2) by means of two fixing rings (21).