A strong wind resistant kite

Abstract

The present invention discloses a strong wind resistant kite, comprising a kite body, a kite frame, a longitudinal reinforcement tube, two sections of transverse reinforcement tubes and a wind line. The kite frame is fixed on the kite body. The kite frame is two cross-crossed straight rods, namely a longitudinal straight rod and a transverse straight rod. The longitudinal reinforcement tube is sleeved on the longitudinal straight rod. The two sections of transverse reinforcement tubes are sleeved on the transverse straight rods divided into two sections. A flexible cross member is arranged at the intersection of the longitudinal reinforcement tube and the two sections of transverse reinforcement tubes. The two ends of the wind line are fixed to the longitudinal straight rods and the longitudinal reinforcement tubes at intervals. Advantages: The kite shows promising results in the use of flexible joints in the design of the kite. The presence of tubular elements strengthens the structure of the kite, and the addition of flexible joints enhances the durability of the kite. The carrying capacity of the kite is sufficient to provide lift for flight, and it is still durable enough to resist any failure in strong winds.

Description

Technical Field

[0001] The invention relates to a strong wind resistant kite. Background Art

[0002] Bio-inspired kites are meant to fly in strong winds without breaking. Kites fly best at speeds of around 10 km / h. Any wind approaching or exceeding 20 km / h is enough to break most types of kites, which explains why broken kites are often seen in places where kites are flown. Summary of the invention

[0003] The purpose of this invention is to design and create 3D printed kites inspired by insect wings that can fly and survive strong winds of more than 50 kilometers per hour.

[0004] The technical solution adopted by the present invention is: a strong wind resistant kite, comprising a kite body, a kite frame, a longitudinal reinforcement tube, two sections of transverse reinforcement tubes and a wind line,

[0005] The plane projection of the kite body is a diagonal prism. The kite body is made of polylactic acid filaments using a three-dimensional printing process. A thin polylactic acid film is covered on the outer surface of the kite body. The kite frame is fixed on a plane on one side of the kite body. The kite frame is two cross-shaped straight rods, namely a longitudinal straight rod and a transverse straight rod. The longitudinal straight rod is located on the long diagonal of the kite body, and the transverse straight rod is located on the short diagonal of the kite body. The two ends of the longitudinal straight rod extend to the two sharp points of the long diagonal of the kite body, and the two ends of the transverse straight rod extend to the two sharp points of the short diagonal of the kite body. The transverse straight rod is divided into two sections at the intersection with the longitudinal straight rod, and a distance is left between the ends of the two sections of the transverse straight rod and the rod wall of the longitudinal straight rod.

[0006] The longitudinal reinforcement tube is sleeved on the longitudinal straight rod and is located at the intersection of the longitudinal straight rods. The two sections of transverse reinforcement tubes are sleeved on the transverse straight rods divided into two sections respectively, and the two sections of transverse reinforcement tubes are located at the intersection of the transverse straight rods. A cross member with flexible connection is arranged at the intersection of the longitudinal reinforcement tube and the two sections of transverse reinforcement tubes.

[0007] The cross member includes a rubber belt, two hooks, two elastic rubber connecting blocks and a connecting protrusion. The connecting protrusion is arranged on the longitudinal reinforcing tube. The two elastic rubber connecting blocks are respectively arranged at the ends of the two sections of the transverse reinforcing tube. The two elastic rubber connecting blocks are symmetrically arranged about the connecting protrusion. A gap is left between the two elastic rubber connecting blocks and the outer surface of the connecting protrusion. The two hooks are respectively arranged at the other ends of the two sections of the transverse reinforcing tube, and the rubber belt is sleeved on the two hooks.

[0008] The two ends of the wind line are fixed at intervals, one end of the wind line is fixed on the rod wall of the longitudinal straight rod, and the other end of the wind line is fixed on the tube wall of the longitudinal reinforcement tube.

[0009] The kite of the invention, inspired by the joints of insect wings, implements a flexible connection in the kite, in which the reinforcing element is bisected. A thin latex rubber belt with a diameter of 70 mm is placed between two hooks designed on the cross member. This allows us to create a slight chord arch, which is intended to improve the stability of the kite in flight. A connection protrusion is made on the longitudinal reinforcing tube at the connection to control the camber angle of the kite by activating the prongs in case of excessive stretching of the belt. The activation of the spikes of the connection protrusions can further strengthen the rigidity of the kite and avoid the loss of carrying capacity due to excessive loads in flight.

[0010] Preferably, the thickness of the thin polylactic acid film is 0.15 mm.

[0011] In the preferred embodiment of the technical solution of the present invention, two adjacent sides of the kite body are defined as short sides, and the other two sides are defined as long sides. The length of the short sides is 24 cm, and the length of the long sides is 27 cm.

[0012] Preferably, the connecting protrusion and the longitudinal reinforcing tube are integrally formed.

[0013] Preferably, the kite further comprises a first tail wing arranged on the longitudinal straight rod and a second tail wing arranged on the kite body, the first tail wing being fixed on the rod wall of the longitudinal straight rod in a "V" shape by two quadrilateral plates, the first tail wing being located at the end of one end of the longitudinal straight rod, and the first tail wing is close to the second tail wing.

[0014] In the preferred embodiment of the technical solution of the present invention, the connecting protrusion gradually decreases from the bottom to the top, and a peak is formed at the top. The connecting protrusion controls the camber angle of the kite by activating the tip when the belt is overstretched. The activation of the tip can further enhance the rigidity of the kite and prevent the kite from losing its carrying capacity due to excessive load during flight.

[0015] In a preferred embodiment of the technical solution of the present invention, the longitudinal straight rod and the transverse straight rod are made of arc-shaped half-tubes. The existence of the tubular elements strengthens the structure of the kite.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The kite of the present invention shows promising results using flexible joints in the design of the kite, the presence of tubular elements strengthens the structure of the kite, and the addition of flexible joints enhances the durability of the kite. The load-bearing capacity of the kite is sufficient to provide lift for flight, and still durable enough to resist any failure in strong winds. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the kite of this embodiment.

[0019] Figure 2 It is an enlarged schematic diagram of the installation structure of the cross member.

[0020] Figure 3 It is a cross-sectional view of the connecting protrusion, the longitudinal reinforcing tube and the longitudinal straight rod. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is described in detail below, but the protection scope of the present invention is not limited to the embodiments.

[0022] To make the content of the present invention more clearly understood, the following Figure 1-Figure 3 The specific implementation manner is further described.

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 used to limit the present invention.

[0024] like Figure 1 As shown, a strong wind resistant kite comprises a kite body 1, a kite frame 4, a longitudinal reinforcement tube 2, two sections of transverse reinforcement tubes 3, a wind line 6, a first tail wing 11 and a second tail wing 12.

[0025] The plane projection of the kite body 1 is a diagonal prism. The kite body 1 is made of polylactic acid filaments using a three-dimensional printing process. A thin polylactic acid film is covered on the outer surface of the kite body 1. The kite frame 4 is fixed on a side plane of the kite body 1. The kite frame 4 is two cross-shaped straight rods, namely a longitudinal straight rod 41 and a transverse straight rod 42. The longitudinal straight rod 41 is located on the long diagonal of the kite body 1, and the transverse straight rod 42 is located on the short diagonal of the kite body 1; both ends of the longitudinal straight rod 41 extend to the two sharp points of the long diagonal of the kite body 1, and both ends of the transverse straight rod 42 extend to the two sharp points of the short diagonal of the kite body 1; the transverse straight rod 42 is divided into two sections at the intersection with the longitudinal straight rod 41, and a spacing 10 is left between the ends of the two sections of the transverse straight rod 42 and the rod wall of the longitudinal straight rod 41.

[0026] In this embodiment, preferably, a 3D printer Prusa i3 MK3 (Prusa Research, Praha, Czech Republic) is used, and polylactic acid (PLA) filament is used to make the kite body 1. The filament diameter is 1.75 mm, and the printing temperature is 200-220°C. In this embodiment, preferably, the thickness of the thin polylactic acid film is 0.15 mm. It is defined that two adjacent sides of the kite body 1 are short sides, and the other two sides are long sides, the length of the short sides is 24 cm, and the length of the long sides is 27 cm.

[0027] like Figure 3 As shown, the longitudinal straight rod 41 and the transverse straight rod 42 are made of arc-shaped half-tubes. The presence of tubular elements strengthens the structure of the kite.

[0028] like Figure 1 and 2 As shown, the longitudinal reinforcing tube 2 is sleeved on the longitudinal straight rod 41 and is located at the intersection of the longitudinal straight rod 41, and the two sections of the transverse reinforcing tube 3 are respectively sleeved on the transverse straight rod 42 divided into two sections, and the two sections of the transverse reinforcing tube 3 are located at the intersection of the transverse straight rod 42; a flexible connecting cross member is set at the intersection of the longitudinal reinforcing tube 2 and the two sections of the transverse reinforcing tube 3.

[0029] like Figure 2 As shown, the cross member includes a rubber belt 5, two hooks 7, two elastic rubber connecting blocks 8 and a connecting protrusion 9. The connecting protrusion 9 is arranged on the longitudinal reinforcing tube 2. The two elastic rubber connecting blocks 8 are respectively arranged at the ends of the two sections of transverse reinforcing tubes 3. The two elastic rubber connecting blocks 8 are symmetrically arranged about the connecting protrusion 9. A gap 13 is left between the two elastic rubber connecting blocks 8 and the outer surface of the connecting protrusion 9; the two hooks 7 are respectively arranged at the other ends of the two sections of transverse reinforcing tubes 3, and the rubber belt 5 is sleeved on the two hooks 7.

[0030] Flexible connected cross members, designed under the inspiration of the joints of insect wings, where the stiffening elements are bisected. A thin latex rubber belt with a diameter of 70 mm is placed between two hooks designed on the cross member. This allows us to create a slight chord arch, which is intended to improve the stability of the kite in flight. A protrusion is made on the longitudinal elements at the connection to control the camber angle of the kite by activating the spikes in case of excessive stretching of the belt. The spike activation can further strengthen the rigidity of the kite, avoiding the loss of load-bearing capacity in flight due to excessive loads).

[0031] like Figure 2 and 3 As shown, the connecting protrusion 9 is integrally formed with the longitudinal reinforcing tube 2. The connecting protrusion 9 gradually decreases from the bottom to the top, and a peak is formed at the top. The connecting protrusion controls the camber angle of the kite by activating the tip when the belt is overstretched. The activation of the tip can further enhance the rigidity of the kite and prevent the kite from losing its carrying capacity due to excessive load during flight.

[0032] like Figure 1 As shown, the two ends of the wind line 6 are fixed at intervals, one end of the wind line 6 is fixed to the rod wall of the longitudinal straight rod 41, and the other end of the wind line 6 is fixed to the tube wall of the longitudinal reinforcing tube 2. The first tail 11 is arranged on the longitudinal straight rod 41, and the second tail 12 is arranged on the kite body 1. The first tail 11 is fixed to the rod wall of the longitudinal straight rod 41 in a "V" shape by two quadrilateral plates. The first tail 11 is located at the end of one end of the longitudinal straight rod 41, and the first tail 11 is close to the second tail 12.

[0033] The kite of this embodiment, the application of bionic flexible joints in the diamond kite, is a unique example to demonstrate the potential of joints in practice.

[0034] The kites of this example were subjected to flight tests to check the performance of the kites in practice. Before the flight tests, we attached the tail and the bridle to the kites so that we could increase the stability of the kite and control its angle of attack, respectively. The kites were tested off the coast of Kiel (24340 Eckernfeld, Berlinstrasse, Sudsland, Germany) (GPS coordinates: Latitude: 54.450432, Longitude: 9.856988). The flying performance of the kites was tested several times (>20 times) in wind speeds of 50 km / h or more.

[0035] The kite of this embodiment was tested in an open area on the seashore with a wind speed of up to 50 km / h. The flight was stable and no signs of failure were observed during the entire flight test. The use of flexible joints in the design of the kite showed promising results. The presence of tubular elements strengthens the structure of the kite. The addition of flexible joints enhances the durability of the kite. The load-bearing capacity of the kite is sufficient to provide lift for flight and still be durable enough to resist any failure in strong winds.

[0036] The parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art.

[0037] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and details may be made without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A strong wind resistant kite, characterized in that: The kite comprises a kite body (1), a kite frame (4), a longitudinal reinforcement tube (2), two sections of transverse reinforcement tubes (3) and a wind line (6). The plane projection of the kite body (1) is a diagonal prism. The kite body (1) is made of polylactic acid filaments using a three-dimensional printing process. A thin polylactic acid film is covered on the outer surface of the kite body (1). The kite frame (4) is fixed on a side plane of the kite body (1). The kite frame (4) is composed of two cross-shaped straight rods, namely a longitudinal straight rod (41) and a transverse straight rod (42). The longitudinal straight rod (41) is located at the long diagonal of the kite body (1). The horizontal straight rod (42) is located on the short diagonal line of the kite body (1); the two ends of the longitudinal straight rod (41) extend to the two sharp points of the long diagonal line of the kite body (1), and the two ends of the horizontal straight rod (42) extend to the two sharp points of the short diagonal line of the kite body (1); the horizontal straight rod (42) is divided into two sections at the intersection with the longitudinal straight rod (41), and a distance (10) is left between the ends of the two sections of the horizontal straight rod (42) and the rod wall of the longitudinal straight rod (41); The longitudinal reinforcement tube (2) is sleeved on the longitudinal straight rod (41) and is located at the intersection of the longitudinal straight rod (41); the two sections of transverse reinforcement tubes (3) are sleeved on the transverse straight rod (42) divided into two sections, respectively; the two sections of transverse reinforcement tubes (3) are located at the intersection of the transverse straight rod (42); a cross member for flexible connection is provided at the intersection of the longitudinal reinforcement tube (2) and the two sections of transverse reinforcement tubes (3); The cross member comprises a rubber belt (5), two hooks (7), two elastic rubber connecting blocks (8) and a connecting protrusion (9); the connecting protrusion (9) is arranged on the longitudinal reinforcing tube (2); the two elastic rubber connecting blocks (8) are respectively arranged at the ends of the two transverse reinforcing tubes (3); the two elastic rubber connecting blocks (8) are symmetrically arranged about the connecting protrusion (9); a gap (13) is left between the two elastic rubber connecting blocks (8) and the outer surface of the connecting protrusion (9); the two hooks (7) are respectively arranged at the other ends of the two transverse reinforcing tubes (3); and the rubber belt (5) is sleeved on the two hooks (7); The two ends of the wind line (6) are fixed at intervals, one end of the wind line (6) is fixed to the rod wall of the longitudinal straight rod (41), and the other end of the wind line (6) is fixed to the tube wall of the longitudinal reinforcement tube (2).

2. The strong wind resistant kite according to claim 1, characterized in that: The thickness of the thin polylactic acid film is 0.15 mm.

3. The strong wind resistant kite according to claim 1, characterized in that: The two adjacent sides of the kite body (1) are defined as short sides, and the other two sides are defined as long sides. The length of the short sides is 24 cm, and the length of the long sides is 27 cm.

4. The strong wind resistant kite according to claim 1, characterized in that: The connecting protrusion (9) and the longitudinal reinforcing tube (2) are integrally formed.

5. The strong wind resistant kite according to claim 1, characterized in that: The kite further comprises a first tail wing (11) arranged on the longitudinal straight rod (41) and a second tail wing (12) arranged on the kite body (1); the first tail wing (11) is fixed to the rod wall of the longitudinal straight rod (41) in a "V" shape by two quadrilateral plates; the first tail wing (11) is located at the end of one end of the longitudinal straight rod (41); the first tail wing (11) is close to the second tail wing (12).

6. The strong wind resistant kite according to claim 1, characterized in that: The connection protrusion (9) gradually decreases from the bottom to the top, and forms a peak at the top.

7. The strong wind resistant kite according to claim 1, characterized in that: The longitudinal straight rod (41) and the transverse straight rod (42) are made of arc-shaped half pipes.

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