Disclosure of Invention
The invention provides a falling prevention device for an unmanned aerial vehicle, which can slow down the falling impact force of the unmanned aerial vehicle when the unmanned aerial vehicle accidentally falls on a slope with more rocks, and prevent the unmanned aerial vehicle from turning over on the slope to cause more serious loss.
The invention is realized by the following technical scheme:
an unmanned aerial vehicle anti-falling device comprises a hollow shell, an air bag component and a plurality of buffering wing components; the outer surface of the top wall of the hollow shell is fixedly connected with the abdomen of the unmanned aerial vehicle, and the bottom wall of the hollow shell is of an open structure; the safety air bag assembly is fixedly connected inside the hollow shell, an air bag in the safety air bag assembly can be extruded out from an opening of the bottom wall of the hollow shell after being inflated and expanded, and a primary buffer structure is formed; the buffer wing assemblies are at least four groups and are uniformly distributed along the circumferential direction of the inner surface of the side wall of the hollow shell, and the side wall of the hollow shell is provided with an opening through which the buffer wing assemblies pass; the buffer wing assembly comprises a folding rod, a wind cloth and a first telescopic rod fixedly connected in the hollow shell, the first telescopic rod can extend to penetrate through an opening in the side wall of the hollow shell, one end of the folding rod is fixed on the telescopic end of the first telescopic rod, the other end of the folding rod is far away from the first telescopic rod and is fixedly connected to the inner surface of the side wall of the hollow shell, one side edge of the wind cloth is fixedly connected to the folding rod, and the other side edge of the wind cloth is fixedly connected to a fixing section of the first telescopic rod; the first telescopic rod can drive the folding rod to be stored in the hollow shell, or drive the folding rod to extend out of the hollow shell, so that the folding rod, the wind cloth and the first telescopic rod together form a buffer wing, and a plurality of buffer wing assemblies surround the hollow shell to form a rollover prevention structure; when unmanned aerial vehicle normally flies, anti-falling device can not start, and first telescopic link, folding rod and wind cloth all are located inside hollow shell this moment, and when the emergence flight accident, anti-falling device starts, and gasbag among the air bag begins to inflate, forms one-level buffer structure, and the extension of first telescopic link drives folding rod and wind cloth and passes the opening on the hollow shell lateral wall, forms the buffering wing, and a plurality of buffering wings combined action place unmanned aerial vehicle and take place to turn on one's side on slope.
Furthermore, the anti-falling device also comprises a plurality of air bag limiting assemblies, wherein the air bag limiting assemblies are uniformly distributed along the circumferential direction of the inner surface of the side wall of the hollow shell, each air bag limiting assembly comprises a plastic plate and a limiting piece, each plastic plate is of an arc-shaped structure, and one end of each plastic plate is rotatably connected with the inner surface of the side wall of the hollow shell; the limiting piece comprises a stress part and a supporting part; one side edge of the stress part is rotatably connected with the lower edge of the opening in the side wall of the hollow shell, and the lower edge of the opening in the side wall of the hollow shell can rotate by a first rotating shaft; the supporting part is of a bending structure and is far away from the upper edge of an opening on the side wall of the hollow shell, one end of the supporting part is fixedly connected to the stress part, the connection point is close to the first rotating shaft, the other end of the supporting part is abutted against the side wall of the hollow shell, the supporting part and the side wall of the hollow shell form a mounting cavity, and the plastic plate is arranged in the mounting cavity; when the first telescopic link is extended, the stress part can be driven to rotate, so that a gap appears between the supporting part and the side wall of the hollow shell, the plastic plates can penetrate under the action of gravity to rotate downwards in the gap, so that the plastic plates are separated from the supporting part to limit the shape of the air bag together, and the buffering effect of the air bag is increased.
Furthermore, the air bag limiting assembly further comprises a secondary buffer plate and a second telescopic rod, one end of the plastic plate, which is rotatably connected with the side wall of the hollow shell, is a rotating end, and the other end of the plastic plate is a free end; the secondary buffer plate is of an arc-shaped structure, one end of the secondary buffer plate is rotatably connected with the free end of the plastic plate to form a second rotating shaft, and the secondary buffer plate can rotate around the second rotating shaft to be attached to the plastic plate; the second telescopic rod is fixedly connected to the rotating end of the plastic plate, a groove is formed in the rotating end, a protrusion matched with the groove is arranged at the other end of the secondary buffer plate, the second telescopic rod can extend to penetrate through the protrusion and the groove to fixedly connect the secondary buffer plate and the plastic plate, an impact sensor used for detecting whether the airbag explodes is installed on one side face, away from the plastic plate, of the secondary buffer plate, and the impact sensor is connected with an electric control part of the second telescopic rod; play cushioning effect when being full of gas gasbag and slope contact, but if bumping sharp-pointed article, the gasbag can explode, and after the gasbag explosion, the signal is received to the automatically controlled part of second telescopic link, and the second telescopic link shortens, the second grade buffer board winds the second rotation axis rotates down, forms second grade buffer structure, and the second grade buffer board has increased the high distance on unmanned aerial vehicle and slope, and the second grade buffer board contacts with the slope at first, plays cushioning effect.
Further, second grade buffer board one end with the rotation of the free end of moulding the shaped plate is connected and is dismantled connection structure, because the direct buffer action that plays with the slope contact of second grade buffer board, compares in other structures of anti-falling device, and the damage of second grade buffer board can be more serious, consequently is connected second grade buffer board one end and the rotation of the free end of moulding the shaped plate and sets up to dismantling connection structure, when the damage of second grade buffer board is serious, need not change whole device, only need with the change of second grade buffer board can.
Further, the arc structure of the plastic plate comprises a straight plate section and an arc plate section, the arc structure of the secondary buffer plate also comprises a straight plate section and an arc plate section, and the radian of the arc plate section of the plastic plate is the same as that of the arc plate section of the secondary buffer plate.
Further, the stress part is of a plate-shaped structure, and the central point of the stress part is located in the extension direction of the first telescopic rod; the supporting part is a U-shaped plate, one wing plate end part of the U-shaped plate is fixedly connected to the stress part, the other wing plate end part of the U-shaped plate is abutted against the side wall of the hollow shell, and the U-shaped plate and the side wall of the hollow shell form a mounting cavity together; the supporting part of U template structure possess enough big space and place the plastic plate, and when first telescopic link extended, just directly pushed the atress portion forward, because the atress portion rotates with hollow shell and is connected, consequently, the atress portion can rotate under the effect of first telescopic link to make the clearance appear between supporting part and the hollow shell lateral wall, supply the plastic plate to rotate to pass.
Further, the hollow shell is of a cuboid structure, the top wall of the hollow shell is of a square structure, and an installation frame for installing the first telescopic rod is arranged inside the hollow shell; the buffering wing assembly has four groups, first telescopic link all with correspond mounting bracket fixed connection.
Furthermore, the ratio of the extended length of the first telescopic rod to the side length of the top wall of the hollow shell is 3-4: 1, the extended length of the first telescopic rod is much longer than the side length of the top wall of the hollow shell, the longer the extended length of the first telescopic rod is, the better the anti-rollover effect on the unmanned aerial vehicle is, and after comprehensive tests, when the ratio of the extended length of the first telescopic rod to the side length of the top wall of the hollow shell is 4-5: 1, the anti-rollover capacity and the cost can be parallel.
Furthermore, after the first telescopic rod is extended, an included angle formed between the first telescopic rod and the folding rod ranges from 10 degrees to 12 degrees.
The invention has the following advantages and beneficial effects:
on one hand, the impact force of falling of the unmanned aerial vehicle is relieved by arranging the safety airbag assembly, so that the unmanned aerial vehicle is prevented from directly colliding with a slope, and on the other hand, the buffering wing assemblies are distributed around the unmanned aerial vehicle, so that the unmanned aerial vehicle is prevented from turning on the slope and causing more serious loss; still set up the shaping board, inject the shape after the gasbag, increase the shock-absorbing capacity of gasbag, utilize locating part and first telescopic link cooperation, put suitable position under with the shaping board before starting the gasbag to still set up the second grade buffer board, under the condition that the gasbag damaged, still can accomplish buffer function, protection unmanned aerial vehicle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Examples
An unmanned aerial vehicle anti-falling device is shown in figures 1 to 8 and comprises a hollow shell 1, an air bag assembly and a plurality of buffering wing assemblies; the outer surface of the top wall of the hollow shell 1 is fixedly connected with the abdomen of the unmanned aerial vehicle, and the bottom wall of the hollow shell 1 is of an open structure; the safety airbag assembly is fixedly connected inside the hollow shell 1, the safety airbag assembly adopts the existing products on the market, when a control part of the safety airbag assembly receives a signal capable of being started, an airbag in the safety airbag assembly starts to inflate, the airbag can be extruded out from an opening of the bottom wall of the hollow shell 1 after inflation and expansion, and a primary buffer structure is formed, when the unmanned aerial vehicle accidentally falls on a slope, the airbag filled with air at the abdomen of the unmanned aerial vehicle is firstly contacted with the slope, the impact after the unmanned aerial vehicle descends is buffered, and the primary buffer structure is formed; in order to prevent the side turning phenomenon of the unmanned aerial vehicle on a slope while buffering, at least four groups of buffering wing assemblies are arranged and are uniformly distributed along the circumferential direction of the inner surface of the side wall of the hollow shell 1, and the side wall of the hollow shell 1 is provided with an opening for the buffering wing assemblies to penetrate through; the buffering wing assembly comprises a folding rod 22, a wind cloth (not shown) and a first telescopic rod 21 fixedly connected in the hollow shell 1, the first telescopic rod 21 can extend to penetrate through an opening in the side wall of the hollow shell 1, one end of the folding rod 22 is fixed on the telescopic end of the first telescopic rod 21, the other end of the folding rod 22 is far away from the first telescopic rod 21 and is fixedly connected to the inner surface of the side wall of the hollow shell 1, one side edge of the wind cloth is fixedly connected to the folding rod 22, and the other side edge of the wind cloth is fixedly connected to a fixing section of the first telescopic rod 21; the first telescopic link 21 can drive the folding rod 22 to be stored in the hollow shell 1, or the folding rod 22 is driven to extend out of the hollow shell 1, so that the folding rod 22, the wind cloth and the first telescopic link 21 jointly form a buffer wing, and a plurality of buffer wing assemblies form a rollover prevention structure around the hollow shell 1.
In the above technical solution, after receiving a start signal, the electric control part of the first telescopic rod 21 starts to extend out of the hollow housing 1, it should be noted that the first telescopic rod 21 is started before the airbag module is started, when the first telescopic rod 21 extends, the folding rod 22 is driven to extend out of the hollow housing 1 together, the wind cloth is connected between the folding rod 22 and the first telescopic rod 21, after the extension of the buffering wing is completed, the folding rod 22 is connected with the first telescopic rod 21, the wind cloth is not sealed, the wind cloth is connected in a cavity formed by the folding rod 22 and the first telescopic rod 21, due to the characteristics of the first telescopic rod 21, the wind cloth is connected with only the fixed section of the first telescopic rod 21, so that the wind cloth cannot be sealed, therefore, the buffering wing structure can only provide a part of buffering effect, and the most important effect of the buffering wing is also used for preventing the unmanned aerial vehicle from rolling over, the length of buffering wing is far longer than the length or the width of unmanned aerial vehicle body, and when unmanned aerial vehicle on the slope, when will take place to turn on one's side under the effect of gravity, the structure of turning on one's side of preventing that a plurality of buffering wing subassemblies formed has increased unmanned aerial vehicle's the area of turning on one's side, leads to unmanned aerial vehicle to turn on one's side the difficulty, can't turn on one's side even to protect unmanned aerial vehicle.
In this embodiment, the folding rod 22 is of a simple folding structure, the folding rod 22 can easily move along with the extension of the first telescopic rod 21, and if necessary, some limiting structures may be further disposed on the folding rod 22, so that the folding rod 22 can be smoothly retracted into the hollow housing 1.
When needs use unmanned aerial vehicle in the more place in slope, choose the unmanned aerial vehicle anti-falling device that this embodiment provided for use, with 1 direct mount of hollow casing at unmanned aerial vehicle's belly, adopt screw installation or other connected mode, if unmanned aerial vehicle meets accident at the flight in-process, lead to the unable normal clear of flight, first telescopic link 21 is at first started, then the air bag subassembly starts, the buffering wing subassembly after the expansion makes unmanned aerial vehicle can unload some impact force at the in-process that falls, when unmanned aerial vehicle falls on the slope, the gasbag that is full of gas is handled remaining impact force.
Furthermore, the anti-falling device also comprises a plurality of air bag limiting assemblies for limiting the air bags, and the positions of the limited air bags, which are touched with the slope, are positions of inflated feet, so that the buffering function can be better implemented; the air bag limiting assemblies are uniformly distributed along the circumferential direction of the inner surface of the side wall of the hollow shell 1 and comprise plastic plates 3 and limiting pieces 4, the plastic plates 3 are of arc-shaped structures, and one ends of the plastic plates are rotatably connected with the inner surface of the side wall of the hollow shell 1; the limiting member 4 comprises a force receiving portion 41 and a supporting portion 42; one side of the stress part 41 is rotatably connected with the lower edge of the opening on the side wall of the hollow shell 1, and the lower edge of the opening on the side wall of the hollow shell 1 can rotate by taking the first rotating shaft as a first rotating shaft; the supporting part 42 is of a bending structure and is far away from the upper edge of an opening on the side wall of the hollow shell 1, one end of the supporting part 42 is fixedly connected to the stress part 41, the connection point is close to the first rotating shaft, the other end of the supporting part 42 is abutted against the side wall of the hollow shell 1, the supporting part 42 and the side wall of the hollow shell 1 form an installation cavity, and the shaping plate 3 is arranged in the installation cavity; when the first telescopic rod 21 is extended, the force-bearing portion 41 can be driven to rotate, so that a gap is formed between the supporting portion 42 and the side wall of the hollow shell 1, and the shaping plate 3 can rotate downwards through the gap under the action of gravity, so that the shaping plates 3 separated from the supporting portion 42 limit the shape of the airbag together.
In the technical proposal, when the whole anti-falling device is not started, the shaping plate 3 is transversely placed and is attached to the inner surface of the side wall of the hollow shell 1, one end of the shaping plate is a rotating end, the other end of the shaping plate is placed in a rotating cavity, when the first telescopic rod 21 in the buffering wing assembly is started, the force bearing part 41 rotates under the thrust of the first telescopic rod 21, so that the support portion 42 also starts to rotate, there is a gap in the installation cavity formed by the support portion 42 and the hollow housing 1, when the lower part of the shaping plate 3 is not supported by the supporting part 42, the shaping plate 3 can rotate under the action of gravity, pass through the gap and reach a preset designated position, the rotation and falling of the shaping plate 3 are a quick process, during the design, the starting time point of the airbag module is later than the starting time point of the first telescopic rod 21, and in the time difference, all the shaping plates 3 reach the proper positions; because the anti-falling device that this embodiment provided is unexpected start in the twinkling of an eye appears in unmanned aerial vehicle flight, unmanned aerial vehicle still is in belly down position state this moment, and under this condition, moulding board 3 can be transferred smoothly under the effect of gravity.
In this embodiment, the overall structure size of the limiting member 4 is determined according to the sizes of the hollow housing 1 and the plastic plate 3, the limiting member 4 is driven by the first telescopic rod 21 to complete the rotation and the action of the lower plastic plate 3, when the anti-falling device is not started, the plastic plate 3 can be stably fixed by the limiting member 4, and when the anti-falling device is started, the gap between the supporting portion 42 of the limiting member 4 and the sidewall of the hollow housing 1 can allow the plastic plate 3 to rotate and fall.
When the unmanned aerial vehicle accidentally falls, the impact force is too large when the air bag touches the slope, if sharp stones, branches and other objects exist on the slope, the air bag can be damaged under multiple impacts, the air bag directly explodes, after the air bag explodes, the part directly contacting the slope becomes the shaping plate 3, and because the distance between the shaping plate 3 and the unmanned aerial vehicle is too close, the unmanned aerial vehicle body is easily damaged under the condition, so that the secondary buffer plate 5 is designed, the air bag limiting assembly further comprises the secondary buffer plate 5 and a second telescopic rod 6, one end of the shaping plate 3, which is rotatably connected with the side wall of the hollow shell 1, is a rotating end, and the other end of the shaping plate is a free end; the secondary buffer plate 5 is of an arc-shaped structure, one end of the secondary buffer plate is rotatably connected with the free end of the shaping plate 3 to form a second rotating shaft, and the secondary buffer plate 5 can rotate around the second rotating shaft to be attached to the shaping plate 3; the second telescopic rod 6 is fixedly connected to the rotating end of the plastic plate 3, a groove is formed in the rotating end, a protrusion matched with the groove is formed in the other end of the secondary buffer plate 5, the second telescopic rod 6 can extend to penetrate through the protrusion and the groove, the secondary buffer plate 5 and the plastic plate 3 are fixedly connected, an impact sensor 7 used for detecting whether an airbag explodes is installed on one side face, away from the plastic plate 3, of the secondary buffer plate 5, and the impact sensor 7 is connected with an electric control portion of the second telescopic rod 6; after the airbag explodes, the second telescopic rod 6 is shortened, and the second-stage buffer plate 5 rotates downwards around the second rotating shaft to form a second-stage buffer structure.
In the technical scheme, the structure of the secondary buffer plate 5 is the same as that of the shaping plate 3 and is an arc-shaped plate, when the secondary buffer plate 5 rotates at a certain angle, the secondary buffer plate 5 can be completely attached to the shaping plate 3 and placed in a placing cavity formed by the supporting part 42 and the hollow shell 1, when the anti-falling device is started, the shaping plate 3 is attached to the secondary buffer plate 5 and rotates together to fall to a proper position, after an airbag explodes in an extreme condition, the impact sensor 7 detects the explosion of the airbag, transmits a signal to the electric control part of the second telescopic rod 6, the second telescopic rod 6 is started to begin to shorten, the connecting structure between the secondary buffer plate 5 and the shaping plate 3 is removed, and the secondary buffer plate 5 falls under the action of gravity until the secondary buffer plate contacts with a slope; the secondary buffer plate 5 increases the distance between the unmanned aerial vehicle and the slope to form a secondary buffer structure to protect the unmanned aerial vehicle in a secondary mode, and in the embodiment, the secondary buffer plate 5 is made of a high-elasticity material with a buffer function, such as a rubber composite material; the sensor for detecting whether the airbag explodes selects the impact sensor 7, the sensor directly selects the existing products on the market, and the size of the impact sensor 7 and the size relation between the secondary buffer plates 5 need to be noticed during selection.
Because second grade buffer board 5 carries out direct contact with the slope, the impact force of receiving is very big, basically every time use will be worn and torn, and degree of wear is also comparatively serious, consequently is connected 5 one end of second grade buffer board and the rotation of moulding board 3's free end and sets up to dismantling connection structure, when second grade buffer board 5 damages seriously, need not change whole device, only need with second grade buffer board 5 change can.
The arc-shaped structure of the plastic plate 3 comprises a straight plate section and an arc-shaped plate section, the arc-shaped structure of the secondary buffer plate 5 also comprises a straight plate section and an arc-shaped plate section, and the radian of the arc-shaped plate section of the plastic plate 3 is the same as that of the arc-shaped plate section of the secondary buffer plate 5; in this embodiment, 3 straight board sections of moulding board are rotated with 1 lateral wall of hollow shell and are connected, the arc board section rotates with second grade buffer board 5 to be connected, after the gasbag explosion, because the structural constraint of 3 bodies of moulding board, make the focus of moulding board 3, the focus of second grade buffer board 5 is all partial to the arc board section of the two structurally, after second telescopic link 6 shortens, moulding board 3 and 5 contact connection relations of second grade buffer board, second grade buffer board 5 then can rotate under the effect of gravity and weigh down, form second grade buffer structure.
The force-bearing part 41 is of a plate-shaped structure, and the central point of the force-bearing part 41 is positioned in the extending direction of the first telescopic rod 21; the supporting part 42 is a U-shaped plate, one wing plate end part of the U-shaped plate is fixedly connected to the stress part 41, the other wing plate end part is abutted against the side wall of the hollow shell 1, and the U-shaped plate and the side wall of the hollow shell 1 form a mounting cavity together; the supporting part 42 of U-shaped plate structure possesses enough big space to place plastic plate 3, and when first telescopic link 21 extended, just directly pushed stress part 41 forward, because stress part 41 rotates with hollow shell 1 and is connected, consequently, stress part 41 can rotate under the effect of first telescopic link 21 to make the clearance appear between supporting part 42 and the hollow shell 1 lateral wall, supply plastic plate 3 to rotate and pass.
The hollow shell 1 is of a cuboid structure, the top wall of the hollow shell 1 is of a square structure, and an installation frame for installing a first telescopic rod 21 is arranged inside the hollow shell 1; the buffer wing assemblies are provided with four groups, and the first telescopic rods 21 are fixedly connected with the corresponding mounting frames; the first telescopic rod 21 is directly fixed on the mounting frame and forms a stable connection relation with the hollow shell 1; the four groups of the buffering wing assemblies form a buffering wing plane, the four groups of the buffering wing assemblies are of a central symmetry structure, and a central symmetry point is a projection point of a central point of the unmanned aerial vehicle on the buffering wing plane.
In order to ensure the overall stability of the anti-rollover structure and ensure the better anti-rollover effect, the length of the first telescopic rod 21 after being extended, namely the length of the buffer wings, is set to be very long, but the rollover effect and the actual manufacturing cost are comprehensively considered, the ratio of the length of the first telescopic rod 21 after being extended to the length of the top wall of the hollow shell 1 is set to be 4-5: 1, and the anti-rollover effect and the manufacturing cost can be balanced within the proportion range.
After the first telescopic rod 21 is extended, the first telescopic rod 21, the folding rod 22 and the edge of the hollow shell 1 form a triangular structure, and the vertex angle of the triangle, namely the included angle formed by the extended first telescopic rod 21 and the folding rod 22, is 10 degrees to 12 degrees.
The whole operation steps of the whole anti-falling device are as follows: when the unmanned aerial vehicle needs to fly in a place with a large slope, the anti-falling device is selected for use, the device is fixedly mounted on the belly of the unmanned aerial vehicle to be protected, attention needs to be paid during mounting, the central position of the whole anti-falling device is preferably on the same straight line with the central position of the unmanned aerial vehicle, and the situation that the flying of the unmanned aerial vehicle is greatly influenced due to the addition of the anti-falling device is avoided; when the unmanned aerial vehicle flies and falls, the control part of the first telescopic rod 21 and the control part of the airbag module receive signals, but the first telescopic rod 21 is started first, the airbag module is started later, in the time difference, the plastic plate 3 reaches a preset position under the matching of the first telescopic rod 21 and the limiting part 4, then the airbag starts to inflate, the shape of the airbag is limited under the action of the plastic plate 3, and the buffering effect of the airbag is enhanced; when the unmanned aerial vehicle falls, the buffering wings can dissolve part of impact force, the rest impact force is buffered by the air bags, when the unmanned aerial vehicle falls onto a slope, the unmanned aerial vehicle can be protected from side turning by the side turning prevention structure formed by the buffering wing assemblies, damage is reduced, and if the air bags are punctured by sharp objects on the slope, the secondary buffering plate 5 attached to the shaping plate 3 starts to rotate to form a secondary buffering structure so as to protect the unmanned aerial vehicle; carry out the buffering shock attenuation by the gasbag to unmanned aerial vehicle under the general condition, but if meet extreme condition, for example the gasbag damages, then can also cushion the shock attenuation by the second grade buffer board, further protect unmanned aerial vehicle.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.