Parachute opening device suitable for unmanned aerial vehicle

Abstract

The utility model provides a parachute opening device suitable for an unmanned aerial vehicle, which comprises a parachute bay with a containing space, a fixing rod, a parachute opening device, a parachute opening device and a parachute opening device. The two ends of the fixing rod are fixed on the outer side of the parachute bay respectively, and the middle area is spaced from the parachute bay. The ejection plate is contained in the containing space and is in sliding connection with the parachute cabin, the gas generator is fixed to the parachute cabin, the cabin cover covers the parachute cabin, the side, right opposite to the ejection plate, of the parachute cabin is provided with a gas chamber which is sunken in the direction away from the ejection plate, and a gas outlet of the gas generator extends into the gas chamber through the containing space; the space between the ejection plate and the hatch cover is used for containing a parachute bag, and the fixing rod is used for being connected with a parachute cord of the parachute bag and is in sliding connection with the parachute cord of the parachute bag. According to the parachute opening device suitable for the unmanned aerial vehicle, the parachute opening time is short, the unfolding speed is high under the action of high-speed airflow, the situation that the parachute cannot be opened due to failure of parts is avoided, recoil force is relatively weak during ejection, and the structure of the unmanned aerial vehicle cannot be damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of parachute assistance, in particular to a parachute opening device suitable for unmanned aerial vehicles. Background Art

[0002] The parachute opening device of a drone parachute refers to a device that uses a certain mechanism to enable the originally folded parachute to open from within the restraint, so as to reduce the landing speed of the drone and enable the drone to land safely.

[0003] Drones are now widely used in surveying, firefighting, electricity, and security industries. The frequent drone crashes not only cause losses to the expensive drone equipment itself, but also pose a serious threat to ground facilities and personnel safety. The function of the drone parachute opening device is to safely open the parachute when the drone fails or needs to be recovered, so that the drone can slowly and safely land on the ground.

[0004] The parachute opening device of the drone parachute in the related technology, if the airflow parachute opening method is used, the parachute opening time will be long, and it is easy to miss the parachute opening opportunity and cause inaccurate landing point. In serious cases, it will also affect the safety of the drone itself, and the parachute will not be deployed quickly enough, and it will be close to the fuselage, which is easy to be affected by airflow and other factors, causing the parachute to hang on the fuselage parts, and finally leading to failure of parachute opening; if the elastic part ejection parachute opening method is used, the elastic part will be compressed for a long time and will cause elastic fatigue, which is easy to fail or cause incomplete parachute opening; if the gunpowder ejection parachute opening method is used, there will be strong recoil, which is easy to damage the drone structure.

[0005] In summary, the parachute opening devices of drone parachutes in the related art either have problems of long opening time and insufficient deployment speed, or have problems of failure of components to open the parachute, or have problems of strong recoil that easily causes damage to the drone structure. Utility Model Content

[0006] In view of the deficiencies of the above-mentioned related technologies, the utility model proposes a parachute opening device suitable for drones, which has a short opening time, a fast unfolding speed, will not fail to open the parachute due to component failure, and has relatively weak recoil and will not cause damage to the drone.

[0007] In the first aspect, the utility model provides a parachute opening device suitable for an unmanned aerial vehicle, comprising a parachute cabin with a receiving space, a fixing rod whose two ends are respectively fixed to the outside of the parachute cabin and the middle area is separated from the parachute cabin, an ejection plate received in the receiving space and forming a sliding connection with the parachute cabin, a gas generator fixed to the parachute cabin and a hatch cover provided on the parachute cabin, an air chamber recessed in a direction away from the ejection plate is provided on a side of the parachute cabin directly opposite to the ejection plate, and an air outlet of the gas generator extends into the air chamber through the receiving space; a parachute bag is accommodated between the ejection plate and the hatch cover, and the fixing rod is used to connect the parachute rope of the parachute bag and form a sliding connection with the parachute rope of the parachute bag.

[0008] Preferably, the parachute cabin includes a rectangular cabin bottom wall, a cabin side wall bent and extended upward from the circumference of the cabin bottom wall, and four protrusions arranged at the four corners of the cabin bottom wall, the protrusions extend along the height direction of the cabin side wall, and each of the protrusions is located at the connection between two adjacent cabin side walls; the air chamber is formed on the cabin bottom wall, and the fixing rod is arranged at the top end of the cabin side wall; the ejection plate is provided with a groove matching the protrusion at the position corresponding to the protrusion, and the groove is pressed against the protrusion to form a sliding connection.

[0009] Preferably, each of the protrusions is provided with a first mounting hole on one side close to the hatch cover; the hatch cover is provided with a second mounting hole at a position corresponding to the first mounting hole, and the hatch cover is fixed to the parachute cabin by nylon screws passing through the second mounting hole and the first mounting hole cover in sequence and forming a detachable connection with the parachute cabin.

[0010] Preferably, a side of the hatch cover away from the ejection plate is flush with a side of the parachute compartment away from the ejection plate.

[0011] Preferably, guide holes recessed in a direction away from the ejection plate are provided on both sides of each corner of the cabin bottom wall on the side facing the ejection plate; a guide column matching the guide hole is provided at a position of the ejection plate corresponding to the guide hole, and the guide column is inserted into the guide hole and forms a sliding connection with the guide hole.

[0012] Preferably, the fixing rods include two groups and are respectively arranged on two opposite cabin side walls, the two groups of fixing rods are symmetrically arranged, and each group of fixing rods includes two fixing rods and are arranged at intervals on the same cabin side wall.

[0013] Preferably, the periphery of the ejection plate is pressed against the inner side of the parachute compartment to form a sliding connection.

[0014] Preferably, the gas generator includes a generator body, a control cable electrically connected to the generator body, and an air pipe connected to the air outlet of the generator body and extending into the air chamber.

[0015] Preferably, the air chamber is a circular cavity and its area is smaller than that of the ejection plate.

[0016] In a second aspect, the utility model provides a drone, which includes a body and a parachute opening device suitable for the drone as described above, which is arranged on the top of the body.

[0017] Compared with the related art, the parachute opening device suitable for unmanned aerial vehicles in the utility model is designed with an ejection plate that is slidably connected to the parachute cabin in the parachute cabin, an air chamber is designed on the side of the parachute cabin opposite to the ejection plate, and a gas generator is designed on the parachute cabin and its outlet is extended into the air chamber through the accommodation space, so that the parachute bag can be accommodated in the parachute cabin, so that when the parachute needs to be opened, the gas generator is controlled to inject gas into the air chamber, so that the ejection plate is pushed to move upward quickly by the thrust of the gas, and then the parachute bag is pushed to eject the cabin cover, and at the same time, the parachute is quickly ejected to a certain height, so that it is quickly deployed under the action of high-speed airflow. This parachute opening method not only has a short opening time, but also a fast deployment speed under the action of high-speed airflow, and there will be no situation where the parachute cannot be opened due to component failure, and the recoil during ejection is relatively weak, which will not cause damage to the structure of the unmanned aerial vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a parachute opening device suitable for a drone provided in an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of partial structural decomposition of a parachute opening device for a drone provided in an embodiment of the utility model;

[0021] Figure 3 A schematic diagram of the overall structure of a parachute opening device for a drone provided by an embodiment of the utility model;

[0022] Figure 4 A schematic diagram of the structural decomposition of a parachute compartment and an ejection plate in a parachute opening device for a drone provided in an embodiment of the utility model;

[0023] Figure 5 A schematic diagram of the structure of a parachute compartment in a parachute opening device for a drone provided in an embodiment of the utility model;

[0024] Figure 6 A schematic structural diagram of a gas generator in a parachute opening device suitable for a drone provided in an embodiment of the utility model.

[0025] Among them, 100, a parachute opening device suitable for unmanned aerial vehicles; 1, a parachute cabin; 11, a cabin bottom wall; 12, a cabin side wall; 13, a protrusion; 14, a first mounting hole; 15, a guide hole; 16, an air chamber; 2, a fixing rod; 3, a catapult plate; 31, a guide column; 32, a groove; 4, a gas generator; 41, a generator body; 42, a control cable; 43, an air pipe; 5, a cabin cover; 51, a second mounting hole; 52, a nylon screw; 6, a parachute bag; 61, an umbrella rope. DETAILED DESCRIPTION

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] It should be noted that the expressions such as "upper", "lower", "left", and "right" mentioned in the embodiments of the present invention are described with reference to the placement states in the accompanying drawings and should not be interpreted as limiting embodiments of the present invention. In addition, it should be understood that in the text, when referring to an element constituting "above" or "below" another element, it is possible that the element directly constitutes "above" or "below" another element, or it is possible that the element constitutes "above" or "below" another element through an intermediate element.

[0029] 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. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] The utility model embodiment provides a parachute opening device 100 suitable for a drone, Figures 1 to 6 As shown, it includes a parachute cabin 1 with a receiving space, a fixing rod 2 whose two ends are respectively fixed to the outside of the parachute cabin 1 and the middle area is separated from the parachute cabin 1, an ejection plate 3 received in the receiving space and slidably connected with the parachute cabin 1, a gas generator 4 fixed to the parachute cabin 1 and a cabin cover 5 covering the parachute cabin 1.

[0031] Among them, an air chamber 16 which is recessed away from the ejection plate 3 is provided on the side of the parachute compartment 1 facing the ejection plate 3, and the gas outlet of the gas generator 4 extends into the air chamber 16 through the receiving space; the ejection plate 3 and the hatch 5 are used to receive the parachute bag 6.

[0032] The fixing rod 2 is used to connect the parachute rope 61 of the parachute pack 6 and form a sliding connection with the parachute rope 61 of the parachute pack 6. Specifically, the parachute rope 61 is wrapped around the outside of the fixing rod 2 to form a sliding connection, and the parachute rope 61 is also covered on the parachute cabin 1 through the cabin cover 5 to achieve pressure fixation.

[0033] Specifically, the periphery of the ejection plate 3 is pressed against the inner side of the parachute compartment 1 to form a sliding connection.

[0034] In this embodiment, the parachute cabin 1 includes a rectangular bottom wall 11, a cabin side wall 12 bent upward and extended from the peripheral side of the cabin bottom wall 11, and four protrusions 13 arranged at the four corners of the cabin bottom wall 11, the protrusions 13 extend along the height direction of the cabin side wall 12, and each protrusion 13 is located at the connection between two adjacent cabin side walls 12; the air chamber 16 is formed on the cabin bottom wall 11, and the fixing rod 2 is arranged at the top end of the cabin side wall 12; the ejection plate 3 is provided with a groove 32 matching the protrusion 13 at the position corresponding to the protrusion 13, and the groove 32 is pressed against the protrusion 13 to form a sliding connection. This design can increase the contact area between the ejection plate 3 and the parachute compartment 1 to increase the friction between the ejection plate 3 and the parachute compartment 1, thereby increasing the impact force of the ejection plate 3 after being subjected to the gas thrust, so that the parachute bag 6 placed on the ejection plate 3 can be ejected to a higher height, avoiding the situation where the parachute contacts the drone when it is deployed, and at the same time ensuring that the ejection plate 3 can only slide along the side of the parachute compartment 1 and the ejection plate 3 that is opposite to the other side.

[0035] Each protrusion 13 is provided with a first mounting hole 14 on one side close to the hatch cover 5; the hatch cover 5 is provided with a second mounting hole 51 at a position corresponding to the first mounting hole 14, and the hatch cover 5 is fixed to the parachute compartment 1 through nylon screws 52 that pass through the second mounting hole 51 and the first mounting hole 14 in sequence, and is detachably connected to the parachute compartment 1. This design can not only better cover the hatch cover 5 on the parachute compartment 1, but also offset the thrust generated by the gas through the nylon screws 52, so as to further enable the parachute bag 6 placed between the ejection plate 3 and the hatch cover 5 to be ejected to a higher height. Specifically, when the hatch cover 5 is indirectly subjected to the thrust of the gas, the thrust of the gas needs to reach the force of breaking the nylon screws 52 before the hatch cover 5 can be ejected.

[0036] The side of the canopy 5 away from the ejection plate 3 is flush with the side of the parachute compartment 1 away from the ejection plate 3. This design can reduce the overall height of the parachute opening device 100 suitable for drones, and can also reduce the weight of the parachute opening device 100 suitable for drones.

[0037] Guide holes 15 recessed in a direction away from the ejection plate 3 are respectively provided on both sides of each corner of the cabin bottom wall 11 on the side facing the ejection plate 3; guide posts 31 matching the guide holes 15 are provided at positions of the ejection plate 3 corresponding to the guide holes 15, and the guide posts 31 are inserted into the guide holes 15 and form a sliding connection with the guide holes 15. This design can ensure that the ejection plate 3 can only slide along the side of the parachute cabin 1 facing the ejection plate 3 to the other side opposite thereto, and is convenient for guiding installation.

[0038] The air chamber 16 is a circular cavity and has an area smaller than the area of ​​the ejection plate 3. The design compresses the gas in the air chamber 16 so that the impact force of the gas is greater, so as to further enable the parachute bag 6 placed between the ejection plate 3 and the hatch 5 to be ejected to a higher height.

[0039] In this embodiment, the fixing rods 2 include two groups and are respectively arranged on two opposite cabin side walls 12. The two groups of fixing rods 2 are symmetrically arranged, and each group of fixing rods 2 includes two fixing rods 2 and are spaced apart and arranged on the same cabin side wall 12. This design can better connect the parachute rope 61 to the fixing rod 2 by sliding.

[0040] In this embodiment, the gas generator 4 includes a generator body 41, a control cable 42 electrically connected to the generator body 41, and an air pipe 43 connected to the gas outlet of the generator body 41 and extending into the air chamber 16. This design can not only control the start timing of the gas generator 4 through the control cable 42, but also enable the gas outlet of the generator body 41 to accurately extend into the air chamber 16 through the air pipe 43. Specifically, the control cable 42 is connected to the control panel of the drone, so that the start timing of the gas generator 4 is realized by giving instructions through the drone's remote control or remote control software.

[0041] The working principle of the parachute opening device 100 suitable for drones in this embodiment is as follows: the control cable 42 is energized to trigger the gas generator 4 to start, thereby injecting a large amount of gas into the air chamber 16, and the gas can be nitrogen or other gases; when the gas reaches a certain amount, it will push the ejection plate 3 to move, and the ejection plate 3 will push the parachute bag 6 and the hatch 5 in turn. When the impact force of the gas reaches the force to break the nylon screw 52, ​​the nylon screw 52 breaks, and the hatch 5 is ejected at the same time. After that, the parachute bag 6 will quickly pop up to a certain height, and the parachute bag 6 will be quickly deployed under the action of the high-speed airflow.

[0042] The following will analyze the parachute opening devices suitable for drones in 4 related technologies:

[0043] 1. Gravity parachute opening device. Its main principle is to place the parachute in the parachute cabin, and the opening of the parachute cabin is located at the bottom. When the UAV fails, the hatch is opened by the electric mechanism to allow the parachute to exit the cabin under gravity, and then open the parachute under the action of relative airflow. This parachute opening device takes a long time to open, and it is easy to miss the opening time and cause inaccurate landing points. In serious cases, it will also affect the safety of the UAV itself. In addition, the parachute is not deployed quickly enough and is close to the fuselage. It is easy to be affected by airflow and other factors, causing the parachute to hang on the fuselage parts, and ultimately leading to the failure of the parachute opening. At the same time, it has many mechanical parts, a relatively complex structure, and a heavy mass. Installing it on a UAV will reduce the effective flight time of the UAV.

[0044] 2. Compression spring parachute opening mechanism: its main principle is to place the compressed spring in the parachute cabin, place the bottom of the parachute on the compressed spring, and lock the cabin cover with a bayonet. When the drone receives the parachute opening command or a fault occurs, the bayonet is removed, and the parachute is ejected by the spring force and opens with the airflow. The long-term compression of the spring of this parachute opening mechanism will produce elastic fatigue, which is easy to fail or lead to incomplete parachute opening.

[0045] 3. The main principle of the servo-controlled parachute opening mechanism is that when the drone is ready to open the parachute, the servo opens the parachute cover, the airflow blows away the parachute cover, and pulls out the parachute. This parachute opening mechanism takes a long time to open, and the parachute will not be deployed quickly enough, and it is close to the fuselage, so it is easy to be affected by airflow and cause the parachute to get caught on the fuselage parts, which eventually leads to the failure of the parachute opening.

[0046] 4. Gunpowder ejection parachute opening, the main principle is to use gunpowder to quickly eject and deploy the parachute. Although the gunpowder explosion of this parachute opening mechanism is rapid, it is too dangerous and has strong recoil, which can easily damage the structure of the drone.

[0047] Compared with the related art, the parachute opening device 100 suitable for the UAV in the present embodiment is designed with an ejection plate 3 in the parachute compartment 1 that is slidably connected to the parachute compartment 1, an air chamber 16 is designed on the side of the parachute compartment 1 that is opposite to the ejection plate 3, and a gas generator 4 is designed on the parachute compartment 1, and its air outlet is extended through the receiving space to the air chamber 16, so that the parachute bag 6 can be accommodated in the parachute compartment 1, so that when the parachute needs to be opened, the gas generator 4 is controlled to inject gas into the air chamber 16, so that the ejection plate 3 is pushed to move upward quickly by the thrust of the gas, and then the parachute bag 6 is pushed to eject the cabin cover 5, and at the same time, the parachute is quickly ejected to a certain height, so that it is quickly deployed under the action of high-speed airflow. This parachute opening method not only has a short opening time, so that the parachute bag can be ejected away from the UAV, and the deployment speed is fast under the action of high-speed airflow, there will be no situation where the parachute cannot be opened due to component failure, and the recoil during ejection is relatively weak, and will not cause damage to the structure of the UAV. In addition, the parachute opening device 100 suitable for the drone in this embodiment has a simple structure, low cost, and light weight, which effectively increases the flight time of the drone. It also has a quick control response, low control difficulty and failure rate, high reliability, and convenient modular installation. It is also suitable for size control and safe recovery of high-speed ejection folding drones.

[0048] The utility model also provides an embodiment of a drone, which includes a body and a parachute opening device 100 suitable for drones as in the above embodiment, which is arranged on the body. Specifically, the side of the parachute compartment 1 away from the canopy 5 is fixed to the top of the drone. Since the drone in this embodiment includes the parachute opening device 100 suitable for drones in the above embodiment, it can also achieve the technical effect achieved by the parachute opening device 100 suitable for drones in the above embodiment, which will not be described in detail here.

[0049] It should be noted that the various embodiments described above with reference to the accompanying drawings are only used to illustrate the present invention rather than to limit the scope of the present invention. Those skilled in the art should understand that any modification or equivalent replacement of the present invention without departing from the spirit and scope of the present invention should be included in the scope of the present invention. In addition, unless otherwise indicated by the context, words appearing in the singular include the plural form, and vice versa. In addition, unless otherwise specified, all or part of any embodiment may be used in combination with all or part of any other embodiment.

Claims

1. A parachute opening device suitable for an unmanned aerial vehicle, characterized in that: The parachute opening device suitable for unmanned aerial vehicles includes a parachute compartment with a storage space, a fixing rod with two ends respectively fixed to the outside of the parachute compartment and a middle area separated from the parachute compartment, an ejection plate received in the storage space and slidably connected with the parachute compartment, a gas generator fixed to the parachute compartment and a hatch cover provided on the parachute compartment, an air chamber recessed in a direction away from the ejection plate is provided on a side of the parachute compartment directly opposite to the ejection plate, and an air outlet of the gas generator extends into the air chamber through the storage space; a parachute bag is accommodated between the ejection plate and the hatch cover, and the fixing rod is used to connect the parachute rope of the parachute bag and slidably connected with the parachute rope of the parachute bag.

2. The parachute opening device for a drone as claimed in claim 1, characterized in that: The parachute cabin comprises a rectangular cabin bottom wall, a cabin side wall extending upwardly from the peripheral side of the cabin bottom wall, and four protrusions arranged at four corners of the cabin bottom wall, wherein the protrusions extend along the height direction of the cabin side wall, and each of the protrusions is located at the connection between two adjacent cabin side walls; The air chamber is formed on the bottom wall of the cabin, and the fixing rod is arranged on the top end of the side wall of the cabin; the ejection plate is provided with a groove matching the protrusion at a position corresponding to the protrusion, and the groove is pressed against the protrusion to form a sliding connection.

3. The parachute opening device for a drone as claimed in claim 2, characterized in that: A first mounting hole is provided on one side of each protrusion close to the hatch cover; a second mounting hole is provided on the hatch cover at a position corresponding to the first mounting hole, and the hatch cover is fixed to the parachute cabin by nylon screws passing through the second mounting hole and the first mounting hole cover in sequence and forming a detachable connection with the parachute cabin.

4. The parachute opening device for a drone as claimed in claim 3, characterized in that: The side of the hatch cover away from the ejection plate is flush with the side of the parachute compartment away from the ejection plate.

5. The parachute opening device for a drone as claimed in claim 2, characterized in that: Guide holes recessed in a direction away from the ejection plate are provided on both sides of each corner of the side of the cabin bottom wall facing the ejection plate; guide columns matching the guide holes are provided at positions of the ejection plate corresponding to the guide holes, and the guide columns are inserted into the guide holes and form a sliding connection with the guide holes.

6. The parachute opening device for a drone as claimed in claim 2, characterized in that: The fixing rods include two groups and are respectively arranged on two opposite cabin side walls. The two groups of fixing rods are symmetrically arranged, and each group of fixing rods includes two fixing rods and are arranged at intervals on the same cabin side wall.

7. The parachute opening device for a drone as claimed in claim 1, characterized in that: The periphery of the ejection plate is pressed against the inner side of the parachute compartment to form a sliding connection.

8. The parachute opening device for a drone as claimed in claim 1, characterized in that: The gas generator includes a generator body, a control cable electrically connected to the generator body, and an air pipe communicated with an air outlet of the generator body and extending into the air chamber.

9. The parachute opening device for a drone as claimed in claim 1, characterized in that: The air chamber is a circular cavity and its area is smaller than that of the ejection plate.

10. A drone, characterized in that: The drone comprises a body and a parachute opening device suitable for the drone as claimed in any one of claims 1 to 9, which is arranged on the top of the body.

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