Airdrop landing anti-rollover cushioning airbag

Abstract

The present invention discloses a cushioning airbag for preventing rollover during airdrop landing, comprising an airbag body installed at the bottom of an airdrop cargo platform or airdrop equipment, an inner bag is provided on the inner top surface of the airbag body, an inflation mechanism is provided on the outer upper part, and an exhaust valve is provided on the outer lower part; the inner bag is independent of the airbag body and exceeds the width edge of the airdrop cargo platform or airdrop equipment; the inflation mechanism comprises an inflation channel connected to the outside, an electric fan is provided upstream of the inflation channel, a one-way blocking plate is provided in the middle, and an air duct partition is provided downstream, the air duct partition separates the inflation channel and forms air inlets of the airbag body and the inner bag respectively, the one-way blocking plate blocks the air inlets of the inner bag and the airbag body and is only opened when the electric fan is working; the exhaust valve is opened when the internal pressure of the airbag body reaches a predetermined pressure. The present invention can maintain a short distance of sliding when the landing horizontal speed is large, eliminate the rollover problem caused by the landing "sudden brake" phenomenon, has a simple structure, and has a wide range of applications.

Description

Technical Field

[0001] The invention belongs to the field of airdrop, and in particular relates to a cushioning airbag for preventing airdrop from rolling over during landing. Background Art

[0002] In the airdrop field, to reduce landing shock and protect the dropped materials, cushioning airbags are typically used to absorb the energy and shock of the vertical drop, thus achieving a cushioned landing. However, due to the influence of wind during the airborne descent before landing, the airdrop system experiences a horizontal motion component during landing. Excessive horizontal motion can easily cause the airdrop platform or equipment to roll over after landing. Summary of the Invention

[0003] The purpose of the present invention is to provide a cushioning airbag for preventing rollover during airdrop landing. The present invention can maintain a short sliding distance when the landing horizontal speed is relatively high, thereby eliminating the rollover problem caused by the "sudden braking" phenomenon during landing. The invention has a simple structure and a wide range of applications.

[0004] The technical solution adopted in the present invention is:

[0005] A cushioning airbag for preventing rollover during airdrop landing comprises an airbag body installed at the bottom of an airdrop cargo platform or airdrop equipment, wherein the inner top surface of the airbag body is provided with an inner bag, the upper outer portion is provided with an inflation mechanism, and the lower outer portion is provided with an exhaust valve; the inner bag is independent of the airbag body and extends beyond the width edge of the airdrop cargo platform or airdrop equipment; the inflation mechanism comprises an inflation channel connected to the outside, an electric fan is provided upstream of the inflation channel, a one-way blocking plate is provided in the middle, and an air duct partition is provided downstream; the air duct partition separates the inflation channel and forms air inlets for the airbag body and the inner bag respectively, the one-way blocking plate blocks the air inlets of the inner bag and the airbag body and is only opened when the electric fan is working; the exhaust valve opens when the internal pressure of the airbag body reaches a predetermined pressure.

[0006] Furthermore, a single set of airdrop landing anti-rollover cushioning airbags is installed along the length direction at the bottom of the airdrop cargo platform or airdrop equipment; or, two sets of airdrop landing anti-rollover cushioning airbags are installed side by side along the length direction at the bottom of the airdrop cargo platform or airdrop equipment.

[0007] Furthermore, the interior of the airbag body is divided into several airbag chambers connected in sequence, the inflation mechanism is installed on the airbag chamber at the end of the airbag body, and each airbag chamber is equipped with an exhaust valve; the interior of the inner bag is divided into several inner bag chambers connected in sequence.

[0008] Furthermore, the one-way blocking plate is rotatably installed in the inflation channel and cooperates with the torsion spring. When the electric fan is not working, the one-way blocking plate is pressed against the limit piece in the inflation channel under the action of the torsion spring to block the air inlet of the inner bag and the airbag body. When the electric fan is working, the airflow pressure overcomes the force of the torsion spring to open the one-way blocking plate.

[0009] Furthermore, the exhaust valve adopts a bursting diaphragm, which bursts when the internal pressure of the airbag body reaches a predetermined pressure.

[0010] Furthermore, the airbag body is provided with a flange at the installation position of the bursting disc, and the flange pressure plate and screws cooperate with the flange to press the bursting disc onto the airbag body.

[0011] Furthermore, the bursting disc is in a disc shape.

[0012] Furthermore, the bursting disc is made of polyvinyl chloride film.

[0013] Furthermore, the height of the inner bag is designed according to the weight of the airdrop cargo platform or airdrop equipment, and is minimized while ensuring that the airdrop cargo platform or airdrop equipment does not directly touch the ground when landing.

[0014] The beneficial effects of the present invention are:

[0015] Before airdrop, the parachute is connected to the airdrop platform or airdrop equipment, and the airbag body is installed at the bottom of the airdrop platform or airdrop equipment and folded up. During airdrop, the electric fan is turned on, and the one-way blocking plate also opens the air inlet of the airbag body and the inner bag. The electric fan inflates the airbag body and the inner bag respectively at the same time. The airbag body and the inner bag are already filled with gas during the airdrop landing process, and the inflation pressure can be adjusted by the electric fan. During the landing process, when the distance between the airdrop platform or airdrop equipment and the ground is less than the height of the airbag body, the airbag body is compressed first while maintaining the vertical and horizontal movement speeds. Then the exhaust valve opens when the internal pressure of the airbag body reaches a predetermined pressure, and the airbag body begins to exhaust. When the distance between the airdrop platform or airdrop equipment and the ground reaches the height of the inner bag, the inner bag begins to be squeezed. The bag is independent and has no outward exhaust holes. It will maintain its shape when compressed to a certain thickness. At the same time, the vertical speed of the airdrop cargo platform or airdrop equipment is decelerated to zero due to exhaust, but the horizontal speed is still there. Since the inner bag exceeds the width edge of the airdrop cargo platform or airdrop equipment, it has an anti-rollover effect. Therefore, one side of the airdrop cargo platform or airdrop equipment will not sink into the ground immediately, but will continue to move in the horizontal direction by pressing the inner bag, consuming horizontal kinetic energy until it slides to a horizontal speed of zero. Therefore, the present invention adopts a method of guiding and dissipating energy to maintain a short distance of sliding when the landing horizontal speed is large, eliminating the rollover problem caused by the "sudden braking" phenomenon of landing. It has a simple structure and a wide range of applications. It can be used for various airdrop cargo platforms or airdrop equipment of varying sizes, especially in the field of heavy airdrop. It has broad development prospects and strategic significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of an airdropped landing anti-rollover cushioning airbag according to an embodiment of the present invention during airdrop.

[0017] Figure 2This is a front view of the installation of the airdrop landing anti-rollover cushioning airbag according to the embodiment of the present invention.

[0018] Figure 3 This is a side view of the installation of a cushioning airbag for preventing airdrop landing from overturning according to an embodiment of the present invention.

[0019] Figure 4 Schematic diagram of the structure of the airbag for preventing airdrop landing from overturning according to an embodiment of the present invention.

[0020] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0021] Figure 6 yes Figure 4 Enlarged view of point B in the middle.

[0022] Figure 7 Schematic diagram of the landing process of the airdrop landing anti-rollover cushioning airbag in an embodiment of the present invention.

[0023] In the figure: 1-parachute; 2-airdrop cargo platform or airdrop equipment; 3-airbag body; 4-inflating mechanism; 5-inner bag; 6-exhaust valve; 7-inflating channel; 8-electric fan; 9-one-way blocking plate; 10-air duct partition; 11-flange; 12-bursting diaphragm; 13-flange pressure plate; 14-screw; 15-torsion spring; 16-limiting part. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and examples.

[0025] like Figures 1 to 5 As shown, a cushioning airbag for preventing rollover during airdrop landing includes an airbag body 3 installed at the bottom of an airdrop cargo platform or airdrop equipment 2, the inner top surface of the airbag body 3 is provided with an inner bag 5, the upper outer side is provided with an inflation mechanism 4, and the lower outer side is provided with an exhaust valve 6; the inner bag 5 is independent of the airbag body 3 and exceeds the width edge of the airdrop cargo platform or airdrop equipment 2; the inflation mechanism 4 includes an inflation channel 7 connected to the outside, an electric fan 8 is provided upstream of the inflation channel 7, a one-way blocking plate 9 is provided in the middle, and an air duct partition 10 is provided downstream, the air duct partition 10 separates the inflation channel 7 and forms air inlets for the airbag body 3 and the inner bag 5 respectively, the one-way blocking plate 9 blocks the air inlets of the inner bag 5 and the airbag body 3 and is only opened when the electric fan 8 is working; the exhaust valve 6 opens when the internal pressure of the airbag body 3 reaches a predetermined pressure.

[0026] like Figures 1 to 3As shown, before airdrop, the parachute 1 is connected to the airdrop cargo platform or airdrop equipment 2, and the airbag body 3 is installed at the bottom of the airdrop cargo platform or airdrop equipment 2 and folded up. During airdrop, the electric fan 8 is turned on, and the one-way blocking plate 9 also opens the air inlet of the airbag body 3 and the inner bag 5. The electric fan 8 inflates the airbag body 3 and the inner bag 5 at the same time. The airbag body 3 and the inner bag 5 are already filled with gas during the airdrop landing process, and the inflation pressure can be adjusted by the electric fan 8. Figure 7 As shown, during the landing process, when the distance between the airdrop cargo platform or airdrop equipment 2 and the ground is less than the height of the airbag body 3, the airbag body 3 is first compressed while maintaining the vertical and horizontal movement speeds. Then the exhaust valve 6 opens when the internal pressure of the airbag body 3 reaches a predetermined pressure, and the airbag body 3 begins to exhaust. When the distance between the airdrop cargo platform or airdrop equipment 2 and the ground reaches the height of the inner capsule 5, the inner capsule 5 begins to be squeezed. The inner capsule 5 is independent and has no outward exhaust holes. It will maintain its shape when compressed to a certain thickness. At the same time, the vertical speed of the airdrop cargo platform or airdrop equipment 2 is decelerated to zero due to exhaust, but the horizontal speed is still there. Since the inner capsule 5 exceeds The width edge of the airdrop cargo platform or airdrop equipment 2 has an anti-rollover effect, so one side of the airdrop cargo platform or airdrop equipment 2 will not sink into the ground immediately, but will continue to move in the horizontal direction by pressing the inner capsule 5, consuming horizontal kinetic energy until it slides to a horizontal speed of zero. Therefore, the present invention adopts a method of guiding and dissipating energy to maintain a short distance of sliding when the landing horizontal speed is relatively high, thereby eliminating the rollover problem caused by the "sudden braking" phenomenon of landing. The structure is simple and the scope of application is wide. It can be used for various airdrop cargo platforms or airdrop equipment 2 of different sizes, especially in the field of heavy airdrop, and has broad development prospects and strategic significance.

[0027] If the size of the airdrop cargo platform or airdrop equipment 2 is not large, a single set of airdrop landing anti-rollover cushioning airbags can be installed along the length direction at the bottom of the airdrop cargo platform or airdrop equipment 2, and a single set of cushioning airbags can be used to achieve cushioning; Figures 1 to 3 As shown, in this embodiment, if the airdrop platform or airdrop equipment 2 is large, two sets of airdrop landing anti-rollover cushioning airbags are installed side by side along the length direction at the bottom of the airdrop platform or airdrop equipment 2. This combination simplifies production and installation, eliminating the need to design cushioning airbags of multiple sizes.

[0028] like Figure 4 As shown, in this embodiment, the interior of the airbag body 3 is divided into several airbag chambers connected in sequence, the inflation mechanism 4 is installed on the airbag chamber at the end of the airbag body 3, each airbag chamber is equipped with an exhaust valve 6, and the interior of the inner bag 5 is divided into several inner bag chambers connected in sequence to ensure the cushioning effect during landing impact.

[0029] like Figure 5As shown, in this embodiment, a one-way blocking plate 9 is rotatably mounted within the inflation passage 7 and cooperates with a torsion spring 15. When the electric fan 8 is not operating, the one-way blocking plate 9, under the action of the torsion spring 15, abuts against a stopper 16 within the inflation passage 7, thereby blocking the air inlet of the inner bag 5 and the airbag body 3. When the electric fan 8 is operating, the airflow pressure overcomes the force of the torsion spring 15 and opens the one-way blocking plate 9. The one-way blocking plate 9 is automatically opened and closed by utilizing the airflow pressure and the force of the torsion spring 15, resulting in a simple and reliable structure. Because of the stopper 16, even if the airbag body 3 is compressed and the internal pressure increases, the one-way blocking plate 9 will not be dislodged.

[0030] like Figure 6 As shown, in this embodiment, the exhaust valve 6 adopts a bursting diaphragm 12. When the internal pressure of the airbag body 3 reaches a predetermined pressure, the bursting diaphragm 12 bursts. Compared with mechanical valves, the cost is low and the instantaneous exhaust volume is large. Figure 6 As shown, in this embodiment, the airbag body 3 is provided with a flange 11 at the mounting position of the bursting disc 12. A flange pressure plate 13 and screws 14 cooperate with the flange 11 to press the bursting disc 12 against the airbag body 3. In this embodiment, the bursting disc 12 can be in the form of a disc and can be made of polyvinyl chloride film.

[0031] In this embodiment, the height of the inner capsule 5 is designed according to the weight of the airdrop cargo platform or airdrop equipment 2, and is minimized while ensuring that the airdrop cargo platform or airdrop equipment 2 does not directly touch the ground when landing.

[0032] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A cushioning airbag for preventing an airdrop from rolling over during landing, characterized in that: It includes an airbag body installed at the bottom of an airdrop cargo platform or airdrop equipment, wherein the inner top surface of the airbag body is provided with an inner bag, the upper outer side is provided with an inflation mechanism, and the lower outer side is provided with an exhaust valve; the inner bag is independent of the airbag body and exceeds the width edge of the airdrop cargo platform or airdrop equipment; the inflation mechanism includes an inflation channel connected to the outside, an electric fan is provided upstream of the inflation channel, a one-way blocking plate is provided in the middle, and an air duct partition is provided downstream, the air duct partition separates the inflation channel and forms air inlets for the airbag body and the inner bag respectively, the one-way blocking plate blocks the air inlets of the inner bag and the airbag body and is only opened when the electric fan is working; the exhaust valve opens when the internal pressure of the airbag body reaches a predetermined pressure.

2. The airdrop landing anti-rollover cushioning airbag as claimed in claim 1, characterized in that: A single set of airdrop landing anti-rollover cushioning airbags is installed along the length direction at the bottom of the airdrop cargo platform or airdrop equipment; or, two sets of airdrop landing anti-rollover cushioning airbags are installed side by side along the length direction at the bottom of the airdrop cargo platform or airdrop equipment.

3. The airdrop landing anti-rollover cushioning airbag as claimed in claim 1, characterized in that: The interior of the airbag body is divided into a number of airbag chambers connected in sequence. The inflation mechanism is installed on the airbag chamber at the end of the airbag body. Each airbag chamber is equipped with an exhaust valve; the interior of the inner bag is divided into a number of inner bag chambers connected in sequence.

4. The airdrop landing anti-rollover cushioning airbag as claimed in claim 1, characterized in that: The one-way blocking plate is rotatably installed in the inflation channel and cooperates with the torsion spring. When the electric fan is not working, the one-way blocking plate is pressed against the limit piece in the inflation channel under the action of the torsion spring to block the air inlet of the inner bag and the airbag body. When the electric fan is working, the airflow pressure overcomes the force of the torsion spring to open the one-way blocking plate.

5. The airdrop landing anti-rollover cushioning airbag as claimed in claim 1, characterized in that: The exhaust valve adopts a bursting diaphragm, which bursts when the internal pressure of the airbag body reaches a predetermined pressure.

6. The airdrop landing anti-rollover cushioning airbag as claimed in claim 5, characterized in that: The airbag body is provided with a flange at the installation position of the bursting diaphragm, and the flange pressure plate and screws cooperate with the flange to press the bursting diaphragm tightly and install it on the airbag body.

7. The airdrop landing anti-rollover cushioning airbag as claimed in claim 5, characterized in that: The bursting disc is in the shape of a disc.

8. The airdrop landing anti-rollover cushioning airbag as claimed in claim 5, characterized in that: The bursting diaphragm is made of polyvinyl chloride film.

9. The airdrop landing anti-rollover cushioning airbag as claimed in claim 1, characterized in that: The height of the inner bag is designed according to the weight of the airdrop cargo platform or airdrop equipment, and the height is kept to the minimum while ensuring that the airdrop cargo platform or airdrop equipment does not directly contact the ground when landing.

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