A segmented recovery buffer device for unmanned aerial vehicles

Abstract

The present invention relates to a segmented recovery buffer device for an unmanned aerial vehicle, which comprises an elastic buffer component, a hydraulic buffer component and an airbag buffer component; the elastic buffer component comprises a connecting plate, a receiving plate and an elastic member, one side of the connecting plate is used to connect with the unmanned aerial vehicle, and the other side of the connecting plate is connected to the receiving plate via the elastic member; the hydraulic buffer component comprises a sleeve and a piston rod, the sleeve has an open end and a closed end, the sleeve is connected to the receiving plate, the piston rod extends into the sleeve through the open end portion of the sleeve and abuts against the sleeve in a sliding seal, and a buffer cavity filled with hydraulic oil is formed between the piston rod and the closed end of the sleeve; the airbag buffer component comprises an inflatable component and an inflatable airbag, the inflatable component is connected to the buffer cavity and the inflatable airbag, and the inflatable airbag is arranged between the connecting plate and the receiving plate; the problem that the material strength and overall air tightness of the recovery buffer airbag are extremely high and it cannot be reused, which seriously increases the flight cost, is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicle (UAV) landing assistance and recovery, and in particular to a segmented recovery buffer device for an unmanned aerial vehicle (UAV). Background Art

[0002] Due to the harsh field combat environment and the lack of taxiway for assisting landing of field UAVs, most field UAVs use recovery parachutes to land, and inflatable airbags are installed under the aircraft. During landing, the recovery parachutes are opened to reduce the landing speed, and the airbags are fully inflated and opened before landing to cushion the landing.

[0003] For example, the utility model patent with application number CN201620740788.4 proposes a drone recovery system, in which the airbag system is provided with four airbags, two of which are provided on the drone fuselage and one on each side wing; the two airbags provided on the fuselage are provided with one at the nose part at the front end of the fuselage and the other at the rear end of the fuselage, on the rear side of the wing; one is provided on each wing to provide landing guarantees for the drone in four directions.

[0004] However, the material strength and overall air tightness requirements for recovering the cushion airbag are extremely high, and it cannot be reused, which seriously increases flight costs. Summary of the invention

[0005] In view of this, it is necessary to provide a segmented recovery buffer device for UAVs to solve the problem that the material strength and overall air tightness of the recovery buffer airbag are extremely high and cannot be reused, which seriously increases the flight cost.

[0006] The present invention provides a segmented recovery buffer device for an unmanned aerial vehicle, comprising an elastic buffer component, a hydraulic buffer component and an airbag buffer component, wherein the elastic buffer component comprises a connecting plate, a receiving plate and an elastic member, wherein one side of the connecting plate is used to connect with the unmanned aerial vehicle, and the other side of the connecting plate is connected with the receiving plate via the elastic member; the hydraulic buffer component comprises a sleeve and a piston rod, wherein the sleeve has an open end and a closed end, the sleeve is connected with the receiving plate, the piston rod extends into the sleeve through the open end portion of the sleeve and abuts against the sleeve in a sliding and sealing manner, and a buffer cavity filled with hydraulic oil is formed between the piston rod and the closed end of the sleeve; the airbag buffer component comprises an inflatable component and an inflatable airbag, wherein the inflatable component is connected to the buffer cavity and the inflatable airbag, and the inflatable airbag is arranged between the connecting plate and the receiving plate.

[0007] Furthermore, the elastic member includes a plurality of springs, and the plurality of springs are evenly arranged along the circumference of the inflatable airbag, one end of the spring is fixedly connected to the connecting plate, and the other end of the spring is fixedly connected to the receiving plate.

[0008] Furthermore, the elastic buffer assembly also includes a plurality of limit rods corresponding to the plurality of springs, one end of the limit rod is fixedly connected to the connecting plate, the other end of the limit rod passes through the receiving plate and is slidably connected to the receiving plate, and the spring is sleeved on the corresponding limit rod.

[0009] Furthermore, the number of the sleeves and the piston rod is two, the two sleeves are relatively arranged on a side of the receiving plate away from the connecting plate, and the distance between the two sleeves gradually increases in a direction away from the connecting plate.

[0010] Furthermore, the two sleeves are fixedly connected to the receiving plate, a telescopic rod is fixedly connected between the two piston rods, and one end of the two piston rods away from the sleeves is fixedly connected to a horizontally arranged support column, and the two support columns are arranged in parallel.

[0011] Furthermore, the inflatable part includes a vacuum pump and a contact switch, the vacuum pump is fixedly connected to the receiving plate, the input end of the vacuum pump is connected to the buffer cavity of the sleeve, the output end of the vacuum pump is connected to the inflatable airbag, the contact switch is arranged on the inner wall of the sleeve away from the piston rod, and the contact switch is electrically connected to the vacuum pump to control the opening and closing of the vacuum pump.

[0012] Furthermore, the input end of the vacuum pump is connected to the oil outlet of the sleeve via an oil inlet pipe, the oil outlet is connected to the buffer cavity, and the output end of the vacuum pump is connected to the inflatable airbag via an oil outlet pipe.

[0013] Furthermore, the inflatable airbag is bonded to the supporting plate, and the inflatable airbag has a first state and a second state. When the inflatable airbag is in the first state, the inflatable airbag is not filled with hydraulic oil, and the inflatable airbag and the connecting plate are spaced apart. When the inflatable airbag is in the second state, the inflatable airbag is filled with hydraulic oil, and the inflatable airbag abuts against the connecting plate.

[0014] Furthermore, the inflatable airbag includes an outer bag and an inner bag, the outer bag is fixedly connected to the receiving plate, the inner bag is communicated with the inflatable member, and the inner bag is built in the outer bag.

[0015] Furthermore, the inner bag includes a plurality of pillar airbags arranged along a matrix array in the outer bag, the length direction of each pillar airbag is the same as the direction of the line between the connecting plate and the receiving plate, the plurality of pillar airbags are interconnected, and one of the pillar airbags is connected to the inflatable member.

[0016] Compared with the prior art, when the UAV contacts the ground, the UAV is subjected to greater force. The elastic buffer assembly includes a connecting plate, a receiving plate and an elastic member. One side of the connecting plate is used to connect with the UAV, and the other side of the connecting plate is connected to the receiving plate via the elastic member; the hydraulic buffer assembly includes a sleeve and a piston rod. The sleeve has an open end and a closed end. The sleeve is connected to the receiving plate. The piston rod extends into the sleeve through the open end portion of the sleeve and abuts against the sleeve in a sliding seal. A buffer cavity filled with hydraulic oil is formed between the piston rod and the closed end of the sleeve to achieve the purpose of controlling the UAV. Rigid buffering, and then, an airbag buffering component is set up including an inflatable part and an inflatable airbag. The inflatable part connects the buffering cavity and the inflatable airbag. The inflatable airbag is set between the connecting plate and the receiving plate. The hydraulic oil is injected into the inflatable airbag through the inflatable part. The inflatable airbag expands to achieve secondary buffering of the UAV, thereby realizing a segmented recovery buffering function. Since the elastic buffering component and the hydraulic buffering component bear most of the external force when the UAV lands, the material strength and overall air tightness of the inflatable airbag are not high, the inflatable airbag is less damaged, and can be used repeatedly, reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of a segmented recovery buffer device for a drone provided in an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the structure of the elastic buffer component and the hydraulic buffer component in the segmented recovery buffer device for a drone provided by an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of the structure of the airbag buffer assembly in the segmented recovery buffer device for a drone provided by an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of the structure of an inflatable airbag in a segmented recovery buffer device for a drone provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0022] like Figure 1As shown, the present invention provides a segmented recovery buffer device for a drone, comprising an elastic buffer assembly 100, a hydraulic buffer assembly 200 and an airbag buffer assembly 300, wherein the elastic buffer assembly 100 comprises a connecting plate 110, a receiving plate 120 and an elastic member 130, wherein one side of the connecting plate 110 is used to connect with the drone, and the other side of the connecting plate 110 is connected to the receiving plate 120 via the elastic member 130; the hydraulic buffer assembly 200 comprises a sleeve 210 and a piston rod 220, wherein the sleeve 210 has an open end and a closed end, the sleeve 210 is connected to the receiving plate 120, the piston rod 220 extends into the sleeve 210 through the open end portion of the sleeve 210 and is in sliding and sealing contact with the sleeve 210, and a buffer cavity filled with hydraulic oil is formed between the piston rod 220 and the closed end of the sleeve 210; the airbag buffer assembly 300 includes an inflatable member 310 and an inflatable airbag 320, the inflatable member 310 is connected to the buffer cavity and the inflatable airbag 320, and the inflatable airbag 320 is arranged between the connecting plate 110 and the receiving plate 120.

[0023] like Figure 2-3 As shown, during implementation, when the UAV contacts the ground, the UAV is subjected to greater force. The elastic buffer assembly 100 includes a connecting plate 110, a receiving plate 120 and an elastic member 130. One side of the connecting plate 110 is used to connect with the UAV, and the other side of the connecting plate 110 is connected to the receiving plate 120 via the elastic member 130; the hydraulic buffer assembly 200 includes a sleeve 210 and a piston rod 220. The sleeve 210 has an open end and a closed end. The sleeve 210 is connected to the receiving plate 120. The piston rod 220 extends into the sleeve 210 through the open end portion of the sleeve 210 and is in sliding and sealing contact with the sleeve 210. A buffer cavity filled with hydraulic oil is formed between the piston rod 220 and the closed end of the sleeve 210. To achieve rigid buffering of the drone, an airbag buffer assembly 300 is then provided, including an inflatable member 310 and an inflatable airbag 320. The inflatable member 310 connects the buffer cavity and the inflatable airbag 320. The inflatable airbag 320 is provided between the connecting plate 110 and the receiving plate 120. The hydraulic oil is injected into the inflatable airbag 320 through the inflatable member 310. The inflatable airbag 320 expands to achieve secondary buffering of the drone, thereby achieving a segmented recovery buffering function. Since the elastic buffer assembly 100 and the hydraulic buffer assembly 200 bear most of the external force when the drone lands, the material strength and overall air tightness of the inflatable airbag 320 are not required to be high, the inflatable airbag 320 is less damaged, and can be used repeatedly, thereby reducing costs.

[0024] The elastic buffer assembly 100 in this embodiment uses elastic force to offset the external force on the ground when the drone lands. Specifically, the elastic buffer assembly 100 includes a connecting plate 110, a receiving plate 120 and an elastic member 130. One side of the connecting plate 110 is connected to the drone, and the other side of the connecting plate 110 is connected to the receiving plate 120 via the elastic member 130. By squeezing the elastic member 130, part of the external force on the drone is offset.

[0025] In one embodiment, the elastic member 130 includes a plurality of springs, which are evenly arranged along the circumference of the inflatable airbag 320 , one end of the spring is fixedly connected to the connecting plate 110 , and the other end of the spring is fixedly connected to the receiving plate 120 .

[0026] In order to make the connecting plate 110 move toward or away from the receiving plate 120 along a fixed direction, in one embodiment, the elastic buffer assembly 100 also includes a plurality of limit rods 140 corresponding to the plurality of springs, one end of the limit rod 140 is fixedly connected to the connecting plate 110, and the other end of the limit rod 140 passes through the receiving plate 120 and is slidably connected to the receiving plate 120, and the spring is sleeved on the corresponding limit rod 140.

[0027] In one embodiment, a connecting screw 111 for connecting with a drone is fixedly connected to a side of the connecting plate 110 away from the receiving plate 120 .

[0028] The hydraulic buffer assembly 200 in this embodiment uses the compression capacity of hydraulic oil to offset the external force on the ground when the drone lands. Specifically, the hydraulic buffer assembly 200 includes a sleeve 210 and a piston rod 220. The sleeve 210 has an open end and a closed end. The sleeve 210 is connected to the receiving plate 120. The piston rod 220 extends into the sleeve 210 through the open end of the sleeve 210 and slides and seals against the sleeve 210. A buffer cavity filled with hydraulic oil is formed between the piston rod 220 and the closed end of the sleeve 210.

[0029] In one embodiment, there are two sleeves 210 and two piston rods 220 . The two sleeves 210 are relatively arranged on a side of the receiving plate 120 away from the connecting plate 110 , and the distance between the two sleeves 210 gradually increases in a direction away from the connecting plate 110 .

[0030] The two sleeves 210 are fixedly connected to the receiving plate 120, a telescopic rod is fixedly connected between the two piston rods 220, and one end of the two piston rods 220 away from the sleeve 210 is fixedly connected to a horizontally arranged support column 221, and the two support columns 221 are arranged in parallel. The telescopic rod is a structure that can be imagined by those skilled in the art to have the ability to telescope along its length direction.

[0031] The airbag cushioning assembly 300 in this embodiment is a structure that further absorbs the external force of the drone after the elastic cushioning assembly 100 and the hydraulic cushioning assembly 200 initially absorb the external force when the drone lands. Specifically, the airbag cushioning assembly 300 includes an inflatable member 310 and an inflatable airbag 320. The inflatable member 310 is connected to the cushioning cavity and the inflatable airbag 320. The inflatable airbag 320 is arranged between the connecting plate 110 and the receiving plate 120.

[0032] In one embodiment, the airbag cushioning assembly 300 includes an inflatable member 310 and an inflatable airbag 320 . The inflatable member 310 is arranged to connect the cushioning cavity and the inflatable airbag 320 . The inflatable airbag 320 is arranged between the connecting plate 110 and the receiving plate 120 .

[0033] like Figure 3 As shown, in order to match the inflation time of the inflatable airbag 320 by the inflatable member 310, in one embodiment, the inflatable member 310 includes a vacuum pump 311 and a contact switch 312. The vacuum pump 311 is fixedly connected to the receiving plate 120. The input end of the vacuum pump 311 is connected to the buffer cavity of the sleeve 210. The output end of the vacuum pump 311 is connected to the inflatable airbag 320. The contact switch 312 is arranged on the inner wall of the sleeve 210 away from the piston rod 220. The contact switch 312 is electrically connected to the vacuum pump 311 to control the opening and closing of the vacuum pump 311. Specifically, when the piston rod 220 absorbs the external force during the landing of the drone, the piston rod 220 moves toward the direction close to the piston cylinder until it contacts the contact switch 312. Then, the vacuum pump 311 is turned on to inflate the inflatable airbag 320.

[0034] In order to enable the contact switch 312 to turn on and off the vacuum pump 311, the vacuum pump 311 is provided with a power supply electrically connected to it, and the line between the power supply and the vacuum pump 311 is connected with the contact switch 312. The line between the power supply and the vacuum pump 311 is connected by pressing the contact switch 312.

[0035] The input end of the vacuum pump 311 is connected to the oil outlet 211 of the sleeve 210 via an oil inlet pipe 313 , the oil outlet 211 is connected to the buffer cavity, and the output end of the vacuum pump 311 is connected to the inflatable airbag 320 via an oil outlet pipe 314 .

[0036] Among them, the inflatable airbag 320 is bonded to the supporting plate 120, and the inflatable airbag 320 has a first state and a second state. When the inflatable airbag 320 is in the first state, the inflatable airbag 320 is not filled with hydraulic oil, and the inflatable airbag 320 is spaced apart from the connecting plate 110. When the inflatable airbag 320 is in the second state, the inflatable airbag 320 is filled with hydraulic oil, and the inflatable airbag 320 is in contact with the connecting plate 110.

[0037] like Figure 4As shown, in order to achieve a large volume expansion of the inflatable airbag 320 with limited hydraulic oil, in one embodiment, the inflatable airbag 320 includes an outer bag 321 and an inner bag 322, the outer bag 321 is fixedly connected to the receiving plate 120, the inner bag 322 is connected to the inflatable member 310, and the inner bag 322 is built in the outer bag 321. It is sufficient to inflate the inner bag 322 to expand the outer bag 321.

[0038] In one embodiment, the inner bag 322 includes a plurality of pillar airbags arranged along a matrix array in the outer bag 321, the length direction of each pillar airbag is the same as the direction of the line between the connecting plate 110 and the receiving plate 120, and the plurality of pillar airbags are interconnected, wherein one of the pillar airbags is connected to the inflatable member 310.

[0039] Compared with the prior art: when the UAV contacts the ground, the UAV is subjected to greater force. The elastic buffer assembly 100 includes a connecting plate 110, a receiving plate 120 and an elastic member 130. One side of the connecting plate 110 is used to connect with the UAV, and the other side of the connecting plate 110 is connected to the receiving plate 120 via the elastic member 130. The hydraulic buffer assembly 200 includes a sleeve 210 and a piston rod 220. The sleeve 210 has an open end and a closed end. The sleeve 210 is connected to the receiving plate 120. The piston rod 220 extends into the sleeve 210 through the open end portion of the sleeve 210 and is in sliding and sealing contact with the sleeve 210. A buffer cavity filled with hydraulic oil is formed between the piston rod 220 and the closed end of the sleeve 210. To achieve rigid buffering of the drone, an airbag buffer assembly 300 is then provided, including an inflatable member 310 and an inflatable airbag 320. The inflatable member 310 connects the buffer cavity and the inflatable airbag 320. The inflatable airbag 320 is provided between the connecting plate 110 and the receiving plate 120. The hydraulic oil is injected into the inflatable airbag 320 through the inflatable member 310. The inflatable airbag 320 expands to achieve secondary buffering of the drone, thereby achieving a segmented recovery buffering function. Since the elastic buffer assembly 100 and the hydraulic buffer assembly 200 bear most of the external force when the drone lands, the material strength and overall air tightness of the inflatable airbag 320 are not required to be high, the inflatable airbag 320 is less damaged, and can be used repeatedly, thereby reducing costs.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A segmented recovery buffer device for an unmanned aerial vehicle, characterized in that: It includes an elastic buffer component, a hydraulic buffer component and an airbag buffer component; The elastic buffer assembly includes a connecting plate, a receiving plate and an elastic member, one side of the connecting plate is used to connect with the drone, and the other side of the connecting plate is connected with the receiving plate via the elastic member; The hydraulic buffer assembly includes a sleeve and a piston rod, wherein the sleeve has an open end and a closed end, the sleeve is connected to the receiving plate, the piston rod extends into the sleeve through the open end portion of the sleeve and abuts against the sleeve in a sliding and sealing manner, and a buffer cavity filled with hydraulic oil is formed between the piston rod and the closed end of the sleeve; The airbag cushioning assembly comprises an inflatable member and an inflatable airbag, wherein the inflatable member is connected to the cushioning cavity and the inflatable airbag, and the inflatable airbag is arranged between the connecting plate and the receiving plate; The elastic member comprises a plurality of springs, the plurality of springs are evenly arranged along the circumference of the inflatable airbag, one end of the spring is fixedly connected to the connecting plate, and the other end of the spring is fixedly connected to the receiving plate; The elastic buffer assembly further includes a plurality of limit rods corresponding to the plurality of springs one by one, one end of the limit rod is fixedly connected to the connecting plate, the other end of the limit rod passes through the receiving plate and is slidably connected to the receiving plate, and the spring is sleeved on the corresponding limit rod; The inflatable member includes a vacuum pump and a contact switch, the vacuum pump is fixedly connected to the receiving plate, the input end of the vacuum pump is communicated with the buffer cavity of the sleeve, the output end of the vacuum pump is communicated with the inflatable airbag, the contact switch is arranged on the inner wall of the sleeve away from the piston rod, and the contact switch is electrically connected to the vacuum pump to control the opening and closing of the vacuum pump; The inflatable airbag is bonded to the supporting plate, and the inflatable airbag has a first state and a second state. When the inflatable airbag is in the first state, the inflatable airbag is not filled with hydraulic oil, and the inflatable airbag is spaced apart from the connecting plate. When the inflatable airbag is in the second state, the inflatable airbag is filled with hydraulic oil, and the inflatable airbag is in contact with the connecting plate.

2. The segmented recovery buffer device for drone according to claim 1 is characterized in that: The number of the sleeves and the piston rods is two, and the two sleeves are relatively arranged on a side of the receiving plate away from the connecting plate, and the distance between the two sleeves gradually increases in a direction away from the connecting plate.

3. The segmented recovery buffer device for drone according to claim 2 is characterized in that: The two sleeves are fixedly connected to the receiving plate, a telescopic rod is fixedly connected between the two piston rods, and one end of the two piston rods away from the sleeves is fixedly connected to a horizontally arranged support column, and the two support columns are arranged in parallel.

4. The segmented recovery buffer device for drone according to claim 1, characterized in that: The input end of the vacuum pump is connected to the oil outlet of the sleeve via an oil inlet pipe, the oil outlet is connected to the buffer cavity, and the output end of the vacuum pump is connected to the inflatable airbag via an oil outlet pipe.

5. The segmented recovery buffer device for drone according to claim 1, characterized in that: The inflatable airbag comprises an outer bag and an inner bag, wherein the outer bag is fixedly connected to the receiving plate, the inner bag is communicated with the inflatable member, and the inner bag is built in the outer bag.

6. The segmented recovery buffer device for drone according to claim 5, characterized in that: The inner bag includes a plurality of pillar airbags arranged in a matrix array in the outer bag, the length direction of each pillar airbag is the same as the direction of the line between the connecting plate and the receiving plate, the plurality of pillar airbags are interconnected, and one of the pillar airbags is connected to the inflatable member.

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