Large fixed-wing drone

Abstract

A large fixed-wing drone comprising a drone body (1), wherein two mirror-image symmetrical supports (5) are vertically attached to each side of the drone body (1), the ends of the two supports (5) jointly fix an upper plate (3) on the same side, the lower surface of the upper plate (3) is telescopically connected to a lower plate (2), the upper surface of the lower plate (2) is fixedly connected to an oil box (4), the two sides of the oil box (4) are each connected to a sleeve (10), a piston (11) is movably connected in the sleeve (10), the upper surface of the piston (11) is fixedly connected to a pushrod (12), the pushrod (12) is movably connected to the sleeve (10), and is vertically attached to the lower surface of the upper plate (3).

Description

Technical area

[0001] The present utility model relates to the field of drone technology, in particular to a large fixed-wing drone. State of the art

[0002] Drones can be divided into large drones and small drones based on their takeoff weight. The landing gears of small drones typically use truss structures or elastic devices composed of metal tubes or spring elements. When landing, the landing force is absorbed by the elastoplastic deformation of the structure. The cushioning efficiency is low, and the aircraft is prone to bouncing. Furthermore, the component must be replaced when the plastic deformation of the structure reaches a certain level.

[0003] Large drones have a greater takeoff weight. To avoid the landing disadvantages of small drones, oil-gas buffers are typically used. Oil-gas buffers can be divided into fixed-bore and variable-bore buffers. During the compression process of fixed-bore buffers, the load is uneven, fluctuating up and down, and the damping-buffering process is unstable, which greatly reduces damping efficiency. Although variable-bore buffers make the damping-buffering process more stable and efficient, they are structurally complex and expensive. Content of the utility model

[0004] The aim of the present utility model is to eliminate the disadvantages of the existing technology and therefore a large fixed-wing drone is developed.

[0005] To achieve the above-mentioned goal, the following technical solutions are applied to the present utility model: a large fixed-wing drone comprises a drone body. Two mirror-symmetrical supports are vertically attached to each side of the drone body. The ends of the two supports on the same side jointly fix an upper plate. The lower surface of the upper plate is telescopically connected to a lower plate. The upper surface of the lower plate is rigidly connected to an oil box. Both sides of the oil box are each connected to a sleeve. A piston is movably connected in the sleeve. The upper surface of the piston is rigidly connected to a push rod. The push rod is movably connected to the sleeve and is vertically attached to the lower surface of the upper plate.

[0006] As a further description of the above technical solution: the upper surface of the upper plate is vertically penetrated by two mirror-inverted symmetrical mounting holes, a guide cylinder is movably guided in each mounting hole, a spring I is attached to each outer circumference of the guide cylinder, the spring I is located between the upper plate and the lower plate, the guide cylinder is vertically attached to the upper surface of the lower plate, and the upper outer circumference of the guide cylinder has an external thread, the upper surface of the upper plate is provided with a nut, and the nut is threadedly connected to the outer circumference of the guide cylinder.

[0007] As a further description of the above technical solutions: the lower surface of the nut has a concentric axial groove, a limit ring is movably connected in the groove, the limit ring is fixedly attached to the outer circumference of the guide cylinder, the limit ring is located above the upper plate, and the external thread is located above the limit ring.

[0008] As a further description of the above technical solutions: on the side surface of the oil box, an externally threaded pipe is connected horizontally, an internally threaded pipe I is connected with a thread on the outside of the externally threaded pipe, a rubber pipe is movably inserted into the internally threaded pipe I, the two ends of the rubber pipe are each firmly connected to a plug II, one of the plugs II is connected to the externally threaded pipe, and the other plug II is connected to a plug I, the plug I is horizontally connected to the sleeve and is firmly attached to the outside of the sleeve, the side of the internally threaded pipe I near the plug I has a concentric annular groove, an internally threaded pipe II is movably connected in the annular groove, and the internally threaded pipe II is connected to the plug I with a thread.

[0009] As a further description of the above technical solutions: the inside of the external thread pipe has an internal thread II, the plug II is connected via the internal thread II in the external thread pipe, an internal thread I is provided in the plug I, and the plug II is connected via the internal thread I in the plug I.

[0010] As a further description of the above technical solutions: a support ring is axially slidingly connected in the annular groove, two mirror-inverted symmetrical slots are axially arranged on the inner wall of the annular groove, a sliding piece is slidably connected in each slot, the sliding piece is firmly connected to the support ring, the outer side of the support ring is rotatably connected to the internally threaded tube II, a ring dovetail groove is concentrically arranged on the outer side of the support ring, a dovetail ring is rotatably connected in the ring dovetail groove, and the dovetail ring is firmly connected to the end of the internally threaded tube II.

[0011] As a further description of the above technical solutions: on the inner wall of the internally threaded pipe I, three pairs of telescopic rods are radially fixed, which are distributed at equal intervals and in a ring shape, a curved plate is fixedly attached to the ends of each telescopic rod, a spring II is attached to each outer circumference of the telescopic rod, and each curved plate rests against the outside of the rubber pipe.

[0012] As a further description of the above technical solutions: the upper surface of the oil box is penetrated by an oil supply hole, a first threaded plug is connected to the inner wall of the oil supply hole, an oil discharge hole runs horizontally on the lower outer side of the oil box, a second threaded plug is connected to the inner wall of the oil discharge hole, and a hexagonal groove is provided on the outside of each of the first plug and the second plug.

[0013] The present utility model has the following advantageous effects.

[0014] Compared with existing technology, this large fixed-wing drone has the characteristics of simple structure, low cost, and easy disassembly. A piston and a sleeve are connected on both sides of the oil box. In addition, the upper and lower plates are connected at the top and bottom of the piston and sleeve, which help dampen and absorb vibrations when the large drone lands. The rubber tube is externally equipped with the internal threaded tube (I), the arc plates (II), the spring (II), and the telescopic rods. When the flow and pressure in the rubber tube increase, and the rubber tube expands and thickens, the rubber tube provides support and dampens the expansion of the rubber tube, preventing it from expanding too quickly and being damaged.In addition, the rubber pipe and the internal thread pipe I between the oil box and the sleeve are connected by thread, which facilitates the disassembly and maintenance of the rubber pipe. Description of the attached drawings Fig. 1 is a spatial diagram of the entire structure in the present utility model; Fig. 2 is a side sectional view of the connection between the upper plate and the lower plate in the present utility model; Fig. 3 is an enlarged view of the structure at point A in Fig. 1 in the present utility model; and Fig. 4 is an enlarged view of the structure at point B in Fig. 2 in the present utility model. Legend:

[0015] 1. Drone body; 2. Lower plate; 3. Upper plate; 4. Oil box; 5. Support; 6. Guide cylinder; 7. Nut; 8. Mounting hole; 9. Spring I; 10. Sleeve; 11. Piston; 12. Push rod; 13. Groove; 14. Limit ring; 15. Internal thread pipe I ; 16. Ring groove; 17. Support ring; 18. Internal thread pipe II; 19. Plug I; 20. Plug II; 21. Internal thread I ; 22. Spring II; 23. Bow plate; 24. Telescopic rod; 25. External thread pipe; 26. Internal thread II; and 27. Rubber pipe. Examples of implementation

[0016] In the following, the technical solutions in the embodiments of the present utility model are described clearly and completely with reference to the figures. Obviously, the described embodiments represent only a portion of the embodiments of the present utility model and not all of the embodiments.

[0017] With reference to Fig. 1 to Fig.4, the present utility model offers the following features. It comprises a drone body 1. Two mirror-inverted symmetrical supports 5 are vertically attached to each side of the drone body 1. The ends of the two supports 5 on the same side jointly fix an upper plate 3. The lower surface of the upper plate 3 is telescopically connected to a lower plate 2. The upper surface of the upper plate 3 is vertically penetrated by two mirror-inverted symmetrical mounting holes 8. A guide cylinder 6 is movably guided in each mounting hole 8. A spring 19 is attached to each outer circumference of the guide cylinder 6. The spring 19 is located between the upper plate 3 and the lower plate 2. The guide cylinder 6 is vertically attached to the upper surface of the lower plate 2, and the upper outer circumference of the guide cylinder 6 has an external thread.The upper surface of the upper plate 3 is provided with a nut 7, and the nut 7 is threadedly connected to the outer circumference of the guide cylinder 6. The lower surface of the nut 7 has a concentric axial groove 13. A limit ring 14 is movably connected in the groove 13. The limit ring 14 is fixedly attached to the outer circumference of the guide cylinder 6. The limit ring 14 is located above the upper plate 3, and the external thread is located above the limit ring 14. The upper surface of the lower plate 2 is fixedly connected to an oil box 4. The two sides of the oil box 4 are each connected to a sleeve 10. A piston 11 is movably connected in the sleeve 10. The upper surface of the piston 11 is fixedly connected to a push rod 12. The push rod 12 is movably connected to the sleeve 10 and is vertically attached to the lower surface of the upper plate 3.

[0018] On the side surface of the oil box 4, an externally threaded pipe 25 is connected horizontally, an internally threaded pipe I 15 is connected with a thread on the outside of the externally threaded pipe 25, a rubber pipe 27 is movably inserted into the internally threaded pipe I 15, the two ends of the rubber pipe 27 are each fixedly connected to a plug II 20, one of the plugs II 20 is connected to the externally threaded pipe 25, and the other plug II 20 is connected to a plug I 19, the plug I 19 is horizontally connected to the sleeve 10 and is fixedly attached to the outside of the sleeve 10, the side of the internally threaded pipe I 15 near the plug I 19 has an annular groove 16 concentrically, an internally threaded pipe II 18 is movably connected in the annular groove 16, and the internally threaded pipe II 18 is connected to the plug I 19 with a thread, the inside of the External threaded pipe 25 has an internal thread II 26,the plug II 20 is connected via the internal thread II 26 in the external threaded pipe 25, an internal thread I 21 is provided in the plug I 19, and the plug II 20 is connected via the internal thread I 21 in the plug I 19.

[0019] A support ring 17 is axially slidably connected in the annular groove 16, two mirror-inverted symmetrical slots are axially arranged on the inner wall of the annular groove 16, a sliding piece is slidably connected in each slot, the sliding piece is firmly connected to the support ring 17, the outer side of the support ring 17 is rotatably connected to the internally threaded tube II 18, a ring dovetail groove is concentrically arranged on the outer side of the support ring 17, a dovetail ring is rotatably connected in the ring dovetail groove, and the dovetail ring is firmly connected to the end of the internally threaded tube II 18.

[0020] In order to fulfill the function of supporting the rubber tube 27, three pairs of telescopic rods 24, which are distributed at equal intervals and in a ring shape, are radially fixed to the inner wall of the internally threaded tube I 15, an arc plate 23 is fixedly attached to the ends of each telescopic rod 24, a spring II 22 is attached to each outer circumference of the telescopic rod 24, and each arc plate 23 rests against the outside of the rubber tube 27.

[0021] In order to facilitate the replacement and filling of the oil in the oil box 4, the upper surface of the oil box 4 is penetrated by an oil supply hole, a first plug with thread is connected to the inner wall of the oil supply hole, an oil discharge hole runs horizontally on the lower outer side of the oil box 4, a second plug with thread is connected to the inner wall of the oil discharge hole, and a hexagonal groove is provided on the outside of each of the first plug and the second plug.

[0022] The present utility model has a simple structure, low manufacturing costs, and allows for easy disassembly of the entire device. A piston 11 and a sleeve 10 are connected to each side of the oil box 4. Furthermore, the upper plate 3 and the lower plate 2 are connected to the top and bottom of the piston 11 and the sleeve 10, which contributes to dampening and absorbing vibrations during landing of the large drone.

[0023] The working process is as follows. When the drone is about to land, the impact force exerts a downward thrust on the upper plate 3, which also exerts a downward thrust on the push rod 12. The movement of the push rod 12 causes the piston 11 to slide downward. The piston 11 then slides downward, forcing the hydraulic oil in the sleeve 10 into the oil box 4 via the rubber pipe 27. Since the pressure on the piston 11 is different when the drone first lands and when the drone takes off, the pressure on the rubber pipe 27 by the hydraulic oil also varies, and the amount of hydraulic oil flowing from the sleeve 10 into the oil box 4 also varies. The inner diameter of the rubber pipe 27 changes accordingly to adapt to the flow rate under different pressures.This not only fulfills an adaptation function, but also avoids the problem that, when using pipes with a fixed inner diameter in the existing technology, the pipe suddenly expands and bursts when hydraulic oil flows under high pressure.

[0024] Additionally, the external surface of the rubber tube 27 includes the internal threaded tube I15, the arcuate plates 23, the spring II22, and the telescopic rods 24. As the flow and pressure in the rubber tube 27 increase and the rubber tube expands and thickens, the rubber tube provides support and dampens the expansion of the rubber tube to prevent the rubber tube from expanding too quickly and becoming damaged. When the rubber tube 27 needs to be removed, first rotate the internal threaded tube II18 so that the internal threaded tube II18 separates from the plug I19. Then, the internal threaded tube II18 is pushed into the annular groove 16. After that, the internal threaded tube I15 is rotated so that the internal threaded tube I15 separates from the external threaded tube 25. Then the plugs II 20 at both ends of the rubber tube 27 are separated from the plug I 19 and the external thread tube 25 by turning.The rubber tube 27 is then removed together with the internally threaded tube I 15, and the rubber tube 27 is pulled directly out of the internally threaded tube I 15. The new rubber tube 27 is then inserted between the three curved plates 23 in the internally threaded tube I 15. The plugs II 20 at both ends of the rubber tube 27 are then first connected to the plug I 19 and the externally threaded tube 25. The internally threaded tube I 15 is then connected to the outside of the externally threaded tube 25. After that, the internally threaded tube II 18 is pulled out of the annular groove 16, and the internally threaded tube II 18 is connected to the outside of the plug I 19, completing the replacement of the rubber tube 27.

Claims

[1] A large fixed-wing drone, comprising a drone body (1), wherein two mirror-inverted symmetrical supports (5) are vertically attached to both sides of the drone body (1), the ends of the two supports (5) on the same side together fix an upper plate (3), the lower surface of the upper plate (3) is telescopically connected to a lower plate (2), the upper surface of the lower plate (2) is fixedly connected to an oil box (4), the two sides of the oil box (4) are each connected to a sleeve (10), a piston (11) is movably connected in the sleeve (10), the upper surface of the piston (11) is fixedly connected to a push rod (12), the push rod (12) is movably connected to the sleeve (10) and is vertically attached to the lower surface of the upper plate (3). [2] The large fixed-wing drone according to claim 1, wherein the upper surface of the upper plate (3) is vertically penetrated by two mirror-inverted symmetrical mounting holes (8), a guide cylinder (6) is movably guided in each mounting hole (8), a spring I (9) is attached to each outer circumference of the guide cylinder (6), the spring I (9) is located between the upper plate (3) and the lower plate (2), the guide cylinder (6) is vertically fastened to the upper surface of the lower plate (2), and the upper outer circumference of the guide cylinder (6) has an external thread, the upper surface of the upper plate (3) is provided with a nut (7), and the nut (7) is threadedly connected to the outer circumference of the guide cylinder (6). [3] The large fixed-wing drone according to claim 2, wherein the lower surface of the nut (7) has a groove (13) concentrically axially, in the groove (13) a limit ring (14) is movably connected, the limit ring (14) is fixedly attached to the outer circumference of the guide cylinder (6), the limit ring (14) is located above the upper plate (3), and the external thread is located above the limit ring (14). [4] The large fixed-wing drone according to claim 1, wherein an externally threaded pipe (25) is horizontally connected to the lateral surface of the oil box (4), an internally threaded pipe I (15) is threadedly connected to the outside of the externally threaded pipe (25), a rubber pipe (27) is movably inserted into the internally threaded pipe I (15), the two ends of the rubber pipe (27) are each fixedly connected to a plug II (20), one of the plugs II (20) is connected to the externally threaded pipe (25), and the other plug II (20) is connected to a plug I (19), the plug I (19) is horizontally connected to the sleeve (10) and fixedly attached to the outside of the sleeve (10), the side of the internally threaded pipe I (15) near the plug I (19) has a concentric annular groove (16), an internally threaded pipe II is inserted in the annular groove (16). (18) is movably connected, and the internal thread pipe II (18) is connected to the threaded plug I (19). [5] The large fixed-wing drone according to claim 4, wherein the inside of the externally threaded tube (25) has an internal thread II (26), the plug II (20) is connected via the internal thread II (26) in the externally threaded tube (25), an internal thread I (21) is provided in the plug I (19), and the plug II (20) is connected via the internal thread I (21) in the plug I (19). [6] The large fixed-wing drone according to claim 4, wherein a support ring (17) is axially slidably connected in the annular groove (16), two mirror-inverted symmetrical slots are axially arranged on the inner wall of the annular groove (16), a sliding piece is slidably connected in each slot, the sliding piece is fixedly connected to the support ring (17), the outer side of the support ring (17) is rotatably connected to the internally threaded tube II (18), an annular dovetail groove is concentrically arranged on the outer side of the support ring (17), a dovetail ring is rotatably connected in the annular dovetail groove, and the dovetail ring is fixedly connected to the end of the internally threaded tube II (18). [7] The large fixed-wing drone according to claim 4, wherein three pairs of telescopic rods (24) distributed at equal intervals and in a ring shape are radially fixed to the inner wall of the internally threaded tube I (15), an arc plate (23) is fixedly attached to the ends of each telescopic rod (24), a spring II (22) is attached to each outer circumference of the telescopic rod (24), and each arc plate (23) rests on the outside of the rubber tube (27). [8] The large fixed-wing drone according to claim 1, wherein the upper surface of the oil box (4) is penetrated by an oil supply hole, a first plug with thread is connected to the inner wall of the oil supply hole, an oil discharge hole extends horizontally on the lower outer side of the oil box (4), a second plug with thread is connected to the inner wall of the oil discharge hole, and a hexagonal groove is provided on the outside of each of the first plug and the second plug.

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