Anti-friction device for protecting power line of mooring unmanned aerial vehicle

Abstract

The utility model relates to an anti-friction device for protecting a power line of a mooring unmanned aerial vehicle, which comprises a double-layer anti-friction ring, and the double-layer anti-friction ring consists of two single-layer anti-friction rings and a connecting column. An anti-friction device is installed at a wire outlet of an unmanned aerial vehicle ground station, so that a power line of the mooring unmanned aerial vehicle can only touch a concave-surface cylinder when moving in all directions, the outer surface of the concave-surface cylinder is a smooth concave surface, the concave-surface cylinder can roll, and the moving range of the concave-surface cylinder in other directions is very small; the friction force generated between the power line of the mooring unmanned aerial vehicle and the concave surface cylinder is small, and the mooring power line can be protected. The power line protection device is reasonable in structural design, low in manufacturing cost and capable of well protecting the power line of the mooring unmanned aerial vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicles, in particular to an anti-friction device for protecting a tethered unmanned aerial vehicle power line. Background Art

[0002] With the rapid development of modern science and technology, drone-related technologies have also made great progress and have been gradually applied to industries such as industrial production, agricultural plant protection, high-altitude aerial photography, aerial monitoring, and logistics and express delivery. Due to the limited load capacity of drones and the influence of battery capacity and weight, most drones must return to the ground station to charge or replace batteries after flying in the air for a certain period of time, which reduces the working efficiency of drones and the continuity of work.

[0003] Therefore, in order to improve the working efficiency of drones, some drones will be equipped with a wire to connect to the ground station so that the ground station can provide power and transmit signals to the drone. Most of this wire is used to power the drone, so this wire connecting the drone and the ground station is generally called a tethered drone power cord. By using a tethered drone power cord, the working efficiency of the drone is indeed improved and the working time is extended. However, during the working time of the drone such as taking off and landing, the tethered drone power cord will rub against the outlet of the ground station power cord, thereby damaging the tethered power cord and affecting the power supply of the drone. Utility Model Content

[0004] The utility model aims to provide an anti-friction device for protecting the power line of a tethered unmanned aerial vehicle, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-friction device for protecting the power line of a tethered drone, comprising a double-layer anti-friction ring, the double-layer anti-friction ring is composed of two single-layer anti-friction rings and a connecting column, the single-layer anti-friction ring comprises a concave cylinder, a connecting ring, a triangular frame, a column mounting hole, a limit plate, an inner connecting rod, an outer connecting rod, and a spring, the side of the connecting ring has a column mounting hole for mounting the connecting column, three outer connecting rods are mounted on the circular inner side of the connecting ring, one end of the outer connecting rod is mounted on the circular inner side of the connecting ring, and the other end of the outer connecting rod is mounted with a spring and an inner connecting rod, One end of the inner connecting rod is installed on the triangular frame and the other end is inside the outer connecting rod. A spring is wound around the outside of the inner connecting rod. Both ends of the spring are respectively installed on the outer connecting rod and the triangular frame. The inner connecting rod is inside the spring. The triangular frame has a triangular shape and has three rods. The inner connecting rod and the spring are installed at the three corners of the triangular frame. Each rod of the triangular frame has a concave cylinder and two limit plates. The inside of the concave cylinder is empty and installed on the rod of the triangular frame. The limit plates are installed at both ends of each rod of the triangular frame. The two ends of the connecting column are respectively installed in the column mounting holes of the two connecting rings.

[0006] Preferably, the concave cylinder is a cylinder with a concave surface and a hollow cylinder inside. The concave cylinder is installed in the middle of each rod of the triangular frame. The diameter of the hollow cylinder inside the concave cylinder is slightly larger than the diameter of each rod of the triangular frame. Both ends of the concave cylinder each have a circular side surface that is perpendicular to the rod of the triangular frame; the outer surface of the concave cylinder is relatively smooth, or a layer of smoother material is evenly coated.

[0007] Preferably, the limiting plates are fixed at both ends of each rod of the triangular frame, the cross-sectional diameter of the limiting plates is larger than the diameter of the hollow cylinder inside the concave cylinder, and each limiting plate is very close to the corresponding side surface of the concave cylinder, thereby limiting the range of movement of the concave cylinder.

[0008] Preferably, the triangular frame is generally an equilateral triangle in shape, consisting of three round rods, with a rounded corner at the connection between every two rods, and an inner connecting rod and a spring are installed on the outside of each rounded corner vertex; the inner connecting rod is perpendicular to the rod of the other triangular frame that is not connected to it.

[0009] Preferably, the outer connecting rod has a larger diameter than the inner connecting rod and is hollow inside, so that the inner connecting rod can be retracted into the outer connecting rod; the spring is wound around the inner connecting rod, and the outer diameter of the spring is substantially the same as the diameter of the outer connecting rod.

[0010] Preferably, the connecting ring has six column mounting holes, and the arc lengths between any two adjacent column mounting holes are equal; when two single-layer anti-friction rings form a double-layer anti-friction ring, first select two arbitrary external connecting rods of different layers with an angle of approximately 60°, and then install them, so that the power cord passes through the outlet of the ground station. If it touches the double-layer anti-friction ring, it can only touch the outer concave surface of the concave cylinder; the outer circular side surface of the connecting ring is welded or installed at the power cord outlet of the UAV ground station.

[0011] Preferably, the center position of the double-layer anti-friction ring can allow the tethered power cord of the drone to pass through, so that the tethered power cord has a larger range of movement.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] (1) When the tethered power cord of the drone passes through the double-layer anti-friction ring, if the tethered power cord touches the outer concave surface of the concave cylinder during the ascent or descent of the tethered power cord, the concave cylinder will roll as the tethered power cord rises or falls, reducing the friction between the tethered power cord and the surrounding concave cylinders; when the tethered power cord moves in other directions and touches the outer concave surface of the concave cylinder, the friction between the tethered power cord and the surrounding concave cylinders is also very small because the outer surface of the concave cylinder is relatively smooth. These movement processes reduce the friction of the tethered power cord at the outlet, thereby reducing the damage to the power cord during the operation of the drone and protecting the tethered power cord.

[0014] (2) The outlet of the anti-friction device has six concave cylinders. No matter in which direction the tethered power cord of the drone moves, if the tethered power cord touches the anti-friction device at the outlet, it can only touch the outer concave surface of the concave cylinder. The middle of the outer surface of the concave cylinder is concave, which makes the moving range of the tethered power cord at the outlet a convex polygon, facilitating the tethered power cord to move more freely. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the application environment of the utility model, wherein (a) is a front view and (b) is an axial view;

[0016] Figure 2 This is a top view of the utility model installed on a ground station;

[0017] Figure 3 It is a schematic diagram of the overall structure of the utility model, wherein (a) is a front view and (b) is a rear view;

[0018] Figure 4 Schematic diagram of the overall structure of the utility model, wherein (a) is a top view, (b) is a bottom view, (c) is a side view, (d) is an axial view, (e) is a left and right isometric view, and (f) is a stereogram;

[0019] Figure 5 Schematic diagram of the structure of a single-layer anti-friction ring of the utility model, wherein (a) is a front view, (b) is a top view, (c) is a bottom view, and (d) is a side view;

[0020] Figure 6 Schematic diagram of the structure of a single-layer anti-friction ring of the utility model, wherein (a) is an axial view and (b) is a stereogram;

[0021] Figure 7 It is a partially enlarged schematic diagram of the spring of the single-layer anti-friction ring of the utility model;

[0022] Figure 8It is a schematic structural diagram of a concave cylinder of the utility model, wherein (a) is a front view, (b) is a top view, and (c) is an axial view.

[0023] Explanation of the reference numerals: 1. UAV; 2. Tethered power cord; 3. Double-layer anti-friction ring; 4. Ground station; 300. Single-layer anti-friction ring; 301. Concave cylinder; 302. Connecting ring; 303. Triangular frame; 304. Column mounting hole; 305. Limiting plate; 306. Inner connecting rod; 307. Outer connecting rod; 308. Spring; 309. Connecting column. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Unless otherwise defined, the technical terms or scientific terms used in the utility model should be the common meanings understood by people with ordinary skills in the field to which the utility model belongs. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings. Figure 1-8As shown, the utility model provides an anti-friction device for protecting the power line of a tethered drone, comprising a double-layer anti-friction ring 3, wherein the double-layer anti-friction ring 3 is composed of two single-layer anti-friction rings 300 and a connecting column 309, wherein the single-layer anti-friction ring 300 comprises a concave cylinder 301, a connecting ring 302, a triangular frame 303, a column mounting hole 304, a limit plate 305, an inner connecting rod 306, an outer connecting rod 307, and a spring 308. The side of the connecting ring 302 has a column mounting hole 304 for mounting the connecting column 309, and three outer connecting rods 307 are mounted on the circular inner side surface of the connecting ring 302, one end of the outer connecting rod 307 is mounted on the circular inner side surface of the connecting ring 302, and the other end of the outer connecting rod 307 is mounted with a spring 308 and an inner connecting rod 306. One end is installed on the triangular frame 303 and the other end is in the outer connecting rod 307. A spring 308 is wound around the outer side of the inner connecting rod 306. Both ends of the spring 308 are respectively installed on the outer connecting rod 307 and the triangular frame 303. The inner connecting rod 306 is inside the spring 308. The triangular frame 303 is triangular in shape and has three rods. The inner connecting rod 306 and the spring 308 are installed at the three corners of the triangular frame 303. Each rod of the triangular frame 303 has a concave cylinder 301 and two limit plates 305. The concave cylinder 301 is empty inside and is installed on the rod of the triangular frame 303. The limit plates 305 are installed at both ends of each rod of the triangular frame 303. The two ends of the connecting column 309 are respectively installed in the column mounting holes 304 of the two connecting rings 302.

[0026] The application environment of double-layer anti-friction ring 3 is as follows Figure 1 and 2 As shown, the ground station 4 supplies power to the drone 1 through the tethered power line 2, and a double-layer anti-friction ring 3 is provided at the outlet of the tethered power line 2. The outer circumferential side of the connecting ring 302 of the double-layer anti-friction ring 3 is welded or installed at the outlet of the power line of the ground station 4.

[0027] In order to reduce the friction force when the tethered power cord 2 passes through the double-layer anti-friction ring 3, the outer surface of the concave cylinder 301 is made relatively smooth, or a layer of relatively smooth material is evenly coated, and the concave cylinder 301 is a cylinder with a concave surface and a hollow cylinder inside, such as Figure 8As shown. The concave cylinder 301 is installed in the middle of each rod of the triangular frame 303. The diameter of the hollow cylinder inside the concave cylinder 301 is slightly larger than the diameter of each rod of the triangular frame. Both ends of the concave cylinder 301 have a circular side surface that is perpendicular to the rod of the triangular frame. At the same time, in order to limit the movement range of the fixed concave cylinder 301, two limit plates 305 are installed at both ends of each rod of the triangular frame 303. Each limit plate 305 is very close to the corresponding side surface of the concave cylinder 301. The cross-sectional diameter of the limit plate 305 is larger than the diameter of the hollow cylinder inside the concave cylinder 301, so that the range of movement of the concave cylinder 301 is very small. Figures 5 to 8 shown.

[0028] In order to make the overall structure more reasonable, the triangular frame 303 is generally an equilateral triangle in shape, consisting of three round rods. The connection between every two rods has a rounded corner, and an inner connecting rod 306 and a spring 308 are installed on the outside of each rounded corner vertex; the inner connecting rod 306 is perpendicular to the rod of the other triangular frame 303 that is not connected to it, so that there are three inner connecting rods 306 and an outer connecting rod 307 in the connecting ring 302. The diameter of the outer connecting rod 307 is larger than that of the inner connecting rod 306 and is hollow inside, so that the inner connecting rod 306 can be retracted into the outer connecting rod 307; the spring 308 is wrapped around the inner connecting rod 306, and the outer diameter of the spring 308 is basically the same as the diameter of the outer connecting rod 307. If the concave cylinder 301 is subjected to a horizontal force from the tethered power cord 2, the contraction of the spring 308 and the inner connecting rod 306 can also relieve part of the horizontal pressure, such as Figure 7 shown.

[0029] In order to make the tethered power cord 2 touch the outer surface of the concave cylinder 301 in all directions of the outlet, when two single-layer anti-friction rings 300 form a double-layer anti-friction ring 3, first select two arbitrary external connecting rods 307 of different layers with an angle of about 60°, and then assemble them, so that when the tethered power cord 2 touches the double-layer anti-friction ring 3, it will only touch the outer concave surface of the concave cylinder 301. At the same time, the arc lengths between any two adjacent column mounting holes 304 of the six column mounting holes 304 of the connecting ring 302 are equal. In order to allow the tethered power cord 2 to have a larger range of movement, the center position of the double-layer anti-friction ring 3 must be large enough to allow the tethered power cord 2 to pass through, such as Figure 3 and 4 shown.

[0030] Therefore, when the tethered power cord 2 of the drone 1 passes through the double-layer anti-friction ring 3, if the tethered power cord 2 rises and falls, the tethered power cord 2 hits the outer concave surface of the concave cylinder 301, and the concave cylinder 301 will roll as the tethered power cord 2 rises or falls, which can reduce the friction between the tethered power cord 2 and the surrounding concave cylinders 301; if the tethered power cord 2 moves in other directions at the outlet and hits the outer concave surface of the concave cylinder 301, since the outer surface of the concave cylinder 301 is relatively smooth, the friction between the tethered power cord 2 and the surrounding concave cylinders 301 is also very small. The outlet of the double-layer anti-friction ring 3 has six concave cylinders 301. No matter which direction the drone 1 drives the tethered power cord 2 to move, it can only hit the outer concave surface of the concave cylinder 301; the outer surface of the concave cylinder 301 is concave in the middle, which makes the moving range of the tethered power cord 2 at the outlet a convex polygon, which is convenient for the drone 1 to drive the tethered power cord 2 to move more freely, such as Figure 3 and 4 shown.

[0031] To sum up, no matter in which direction the drone 1 drives the tethered power cord 2 to move, if the tethered power cord 2 touches the double-layer anti-friction ring 3 of the outlet of the ground station 4, it will only touch the outer concave surface of the concave cylinder 301, and the friction force generated between them is very small, which reduces the friction of the tethered power cord 2 at the outlet, greatly reduces the wear of the tethered power cord 2 during operation, and protects the tethered power cord 2.

[0032] The standard parts used in the utility model can all be purchased from the market, and each component can be customized according to the description and the drawings.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the preferred embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. An anti-friction device for protecting the power cord of a tethered drone, characterized in that: The invention comprises a double-layer anti-friction ring (3), wherein the double-layer anti-friction ring (3) is composed of two single-layer anti-friction rings (300) and a connecting column (309); the single-layer anti-friction ring (300) comprises a concave cylinder (301), a connecting ring (302), a triangular frame (303), a column mounting hole (304), a stopper (305), an inner connecting rod (306), an outer connecting rod (307), and a spring (308); a side surface of the connecting ring (302) is provided with a column mounting hole (304) for mounting the connecting column (309); three outer connecting rods (307) are mounted on the circular inner side surface of the connecting ring (302); one end of the outer connecting rod (307) is mounted on the circular inner side surface of the connecting ring (302); the other end of the outer connecting rod (307) is mounted with a spring (308) and an inner connecting rod (306); one end of the inner connecting rod (306) is mounted on the triangular frame (303). The other end is inside the outer connecting rod (307). A spring (308) is wound around the outer side of the inner connecting rod (306). The two ends of the spring (308) are respectively mounted on the outer connecting rod (307) and the triangular frame (303). The inner connecting rod (306) is inside the spring (308). The triangular frame (303) is triangular in shape and has three rods. The inner connecting rod (306) and the spring (308) are mounted at the three corners of the triangular frame (303). Each rod of the triangular frame (303) has a concave cylinder (301) and two limiting plates (305). The concave cylinder (301) is hollow inside and is mounted on the rod of the triangular frame (303). The limiting plates (305) are mounted on the two ends of each rod of the triangular frame (303). The two ends of the connecting column (309) are respectively mounted in the column mounting holes (304) of the two connecting rings (302).

2. The anti-friction device for protecting the power line of a tethered drone according to claim 1, characterized in that: The concave cylinder (301) is a cylindrical body with a concave surface and a hollow cylinder inside. The concave cylinder (301) is installed in the middle of each rod of the triangular frame (303). The diameter of the hollow cylinder inside the concave cylinder (301) is slightly larger than the diameter of each rod of the triangular frame (303). Both ends of the concave cylinder (301) each have a circular side surface that is perpendicular to the rod of the triangular frame (303). The outer surface of the concave cylinder (301) is relatively smooth, or is evenly coated with a layer of relatively smooth material.

3. The anti-friction device for protecting the power line of a tethered drone according to claim 1, characterized in that: The limiting plates (305) are fixed at both ends of each rod of the triangular frame (303); the cross-sectional diameter of the limiting plates (305) is larger than the diameter of the hollow cylinder inside the concave cylinder (301); each limiting plate (305) is very close to the corresponding side surface of the concave cylinder (301), thereby limiting the range of movement of the concave cylinder (301).

4. The anti-friction device for protecting the power line of a tethered drone according to claim 1, characterized in that: The triangular frame (303) is in the shape of an equilateral triangle and is composed of three round rods. The connection between every two rods has a rounded corner. An inner connecting rod (306) and a spring (308) are installed on the outside of each rounded corner vertex. The inner connecting rod (306) is perpendicular to the rod of another triangular frame (303) that is not connected to it.

5. The anti-friction device for protecting the power line of a tethered drone according to claim 1, characterized in that: The outer connecting rod (307) has a larger diameter than the inner connecting rod (306) and is hollow inside, so that the inner connecting rod (306) can be retracted into the outer connecting rod (307); the spring (308) is wound around the inner connecting rod (306).

6. The anti-friction device for protecting the power line of a tethered drone according to claim 1, characterized in that: The connecting ring (302) has six column mounting holes (304), and the arc lengths between any two adjacent column mounting holes (304) are equal; the outer circular side surface of the connecting ring (302) is installed at the power line outlet of the UAV ground station (4).

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