Repeatable small air-drop platform with anti-impact structure

Abstract

The invention relates to the technical field of aviation equipment, and discloses a repeatable small air-drop platform with an anti-impact structure, which comprises a supporting platform, an air-drop box fixedly arranged on the upper surface of the supporting platform and a buffer plate arranged below the supporting platform, and mounting cylinders are fixedly mounted at four corners of the upper surface of the supporting platform; a buffer assembly is slidably arranged in the mounting cylinder, and the bottom end of the buffer assembly penetrates through the supporting platform to be connected with the buffer plate. Through cooperative arrangement of the locking assembly and the containing groove in the bottom of the supporting platform, the buffer plate can be contained in the containing groove in the locking state, the overall appearance size and the windward area of the air-drop platform are remarkably reduced, the wind load effect and pneumatic interference in the air-drop falling process are effectively reduced, it is ensured that the platform keeps a stable falling track, and the service life of the air-drop platform is prolonged. The technical problems that an existing air-drop platform is too large in appearance size and prone to deviating from a preset drop point due to the buffer structure layout are solved, the drop precision is greatly improved, and the adaptability to actual application scenes is enhanced.

Description

Technical Field

[0001] This invention relates to the field of aviation equipment technology, specifically a repeatable small airdrop platform with an impact-resistant structure. Background Technology

[0002] An airdrop platform is a specialized system mounted on transport aircraft, helicopters, or drones. It has a metal frame as its main body and integrates parachute connections, cushioning and shock absorption, and anti-tipping components. It can be divided into integral and modular types and can adapt to the delivery needs of everything from conventional materials to heavy equipment such as tanks. It uses gravity or towing to smoothly release cargo from the aircraft and uses multi-stage parachutes and airbags to achieve precise landing. It is widely used in military logistics, emergency rescue, and remote area resupply scenarios. With its advantages of overcoming geographical obstacles and adapting to complex environments, it has become a core piece of equipment for efficient and rapid airdrop.

[0003] Chinese patent CN110282134A discloses an aerial drop buffer platform, which mainly includes a buffer frame, a support frame, a buffer with lifting screws, a return spring and other components and filled with working oil, and a parachute. Multiple buffers are installed between the support frame and the buffer frame. During drop, the parachute uses wind resistance to assist in deceleration. During landing, the buffer absorbs and consumes the kinetic energy and gravitational potential energy of the platform through the damping effect of the working oil, so that the support frame descends smoothly relative to the buffer frame until the buffer frame enters the interior of the support frame, so as to achieve a smooth landing of the airdropped materials to avoid damage. The platform has a simple structure, reliable performance, and is easy to install. It is suitable for scenarios such as earthquake relief, military and other scenarios that require aerial drop of materials.

[0004] As mentioned in the patent, existing airdrop platforms typically employ a buffer as the core cushioning structure to achieve impact resistance during the descent phase. Its telescopic components (such as plungers) are rigidly connected to the buffer frame. During landing, the buffer frame contacts the ground first, and the telescopic components of the buffer retract to absorb impact energy, thus weakening the landing impact. However, this design has inherent limitations: the buffer itself has a fixed axial dimension, and its connection to the buffer frame must extend outwards from the bottom wall of the airdrop platform. Simultaneously, to meet the buffer's telescopic travel requirements, a specific distance must be reserved between the buffer frame and the bottom wall of the airdrop platform. This structural layout directly increases the overall size of the airdrop platform. A larger size significantly increases the platform's windward area during descent, making it more susceptible to wind loads. Increased wind loads interfere with the stability of the platform's descent trajectory, ultimately causing the platform to deviate from the preset landing point, drastically reducing delivery accuracy and negatively impacting its adaptability to practical applications.

[0005] Therefore, it is necessary to provide a repeatable small airdrop platform with an impact-resistant structure to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a repeatable small airdrop platform with an impact-resistant structure. By cooperating with the locking component and the storage slot at the bottom of the support platform, the buffer plate can be stored in the storage slot when locked, which significantly reduces the overall size and windward area of ​​the airdrop platform, effectively reduces the wind load and aerodynamic interference during the airdrop descent process, and ensures that the platform maintains a stable descent trajectory.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a repeatable small airdrop platform with an impact-resistant structure, comprising a support platform, an airdrop box fixedly installed on the upper surface of the support platform, and a buffer plate installed below the support platform. Mounting cylinders are fixedly installed at the four corners of the upper surface of the support platform. A buffer assembly is slidably installed inside the mounting cylinder. The bottom end of the buffer assembly passes through the support platform and connects to the buffer plate. A mounting box is fixedly installed at the bottom of the support platform. A locking assembly for locking the buffer plate is installed inside the mounting box. In the locked state, the buffer plate is stored at the bottom of the support platform to reduce airdrop wind resistance. In the unlocked state, the buffer plate moves downward relative to the support platform to exert a buffering effect.

[0008] A further configuration of the present invention is as follows: a piston is slidably installed inside the mounting cylinder; the buffer assembly includes a spring damper and a connecting column; the top end of the spring damper is fixedly connected to the piston; the bottom end of the spring damper is fixedly connected to the connecting column; the connecting column passes through the support platform; and the bottom end of the connecting column is fixedly connected to the buffer plate; the connecting column and the support platform are slidably engaged.

[0009] A further feature of the present invention is that the top end of the mounting cylinder is provided with an opening, and a one-way valve is provided inside the opening. The one-way valve allows outside air to enter the mounting cylinder through the opening, while the air inside the mounting cylinder cannot be discharged outward through the one-way valve.

[0010] A further feature of the present invention is that the one-way valve includes a valve plate, which rotates toward the inside of the mounting cylinder when the one-way valve is opened. An air hole is provided on the valve plate, and when the piston moves upward, the air in the mounting cylinder is discharged through the air hole.

[0011] A further feature of the present invention is that a storage groove is provided at the bottom of the support platform for accommodating the buffer plate.

[0012] A further feature of the present invention is that connecting rings are fixedly installed at the four corners of the top of the airdrop box, and the airdrop box is connected to the sling of the parachute through the connecting rings.

[0013] A further feature of the present invention is that a plurality of sets of ball bearings are embedded and installed on the lower surface of the buffer plate, and the plurality of sets of ball bearings are respectively located at the four corners of the buffer plate.

[0014] A further feature of the present invention is that the buffer plate has a groove, the groove is adapted to the mounting box, and when the buffer plate is located in the storage groove, the mounting box is located in the groove.

[0015] A further configuration of the present invention is as follows: the locking assembly includes an electric push rod and a locking block; the electric push rod is fixedly installed inside the mounting box; the locking block penetrates the side wall of the mounting box and slides with the mounting box; the output end of the electric push rod is fixedly connected to the locking block; a slot is provided on the buffer plate, the slot is located next to the groove, and the locking block is adapted to the slot; when the locking assembly locks the buffer plate, the locking block is inserted into the slot to lock the buffer plate.

[0016] A further feature of the present invention is that a plurality of adjusting screws are threadedly installed on the support platform, the adjusting screws passing through the support platform, and a knob is fixedly installed at the top end of the adjusting screw.

[0017] In summary, the present invention has the following beneficial effects: By cooperating with the locking component and the storage groove at the bottom of the support platform, the buffer plate can be stored in the storage groove in the locked state, which significantly reduces the overall size and windward area of ​​the airdrop platform, effectively reduces the wind load and aerodynamic interference during the airdrop descent, and ensures that the platform maintains a stable descent trajectory. It solves the technical problem that the existing airdrop platform is too large in size and easily deviates from the preset landing point due to the layout of the buffer structure, greatly improves the delivery accuracy, and enhances the adaptability to actual application scenarios.

[0018] This invention utilizes a synergistic design of a spring damper, a piston inside the mounting cylinder, a one-way valve, and an air vent to create a dual buffering mechanism upon landing: a primary buffer from spring compression and a secondary buffer from gas throttling. This avoids secondary impacts caused by spring rebound, significantly improving impact resistance. The ball bearings on the lower surface of the buffer plate absorb residual horizontal velocity through rolling friction, preventing the airdrop container from tipping over. Combined with the sliding friction at the bottom edge of the support platform, this achieves braking, further ensuring the safety of the supplies. The control module supports multiple control modes, including timed, remote, and manual modes. The adjusting screw facilitates the transfer of the airdrop platform. The battery supports rechargeable operation, and the core components are designed without easily worn parts, enabling the airdrop platform to be reused and operated flexibly, balancing practicality and economy. Attached Figure Description

[0019] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention;

[0020] Figure 2 This is the second three-dimensional structural schematic diagram of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the present invention when the buffer plate is unlocked;

[0022] Figure 4This is a schematic diagram of the support platform of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the buffer plate of the present invention;

[0024] Figure 6 This is a cross-sectional view of the mounting cylinder of the present invention;

[0025] Figure 7 For the present invention Figure 6 A magnified structural diagram at point A;

[0026] Figure 8 This is a schematic diagram of the one-way valve of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure of the buffer component of the present invention;

[0028] Figure 10 This is a cross-sectional view of the mounting box of the present invention.

[0029] In the diagram: 1. Support platform; 101. Storage slot; 2. Airdrop box; 3. Mounting cylinder; 4. Piston; 5. Spring damper; 6. Connecting column; 7. Buffer plate; 701. Groove; 702. Slot; 8. Ball bearing; 9. One-way valve; 901. Valve plate; 902. Air hole; 10. Mounting box; 11. Electric push rod; 12. Locking block; 1201. Inclined surface; 13. Control box; 14. Adjusting screw; 15. Knob; 16. Connecting ring; 17. Limiting ring. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] Please see Figures 1-10 In this embodiment of the invention, a repeatable small airdrop platform with an impact-resistant structure includes a support platform 1, an airdrop box 2 fixedly mounted on the upper surface of the support platform 1, and a buffer plate 7 disposed below the support platform 1. Mounting cylinders 3 are fixedly installed at the four corners of the upper surface of the support platform 1. A buffer assembly is slidably disposed within the mounting cylinder 3, with its bottom end penetrating the support platform 1 and connecting to the buffer plate 7. A mounting box 10 is fixedly disposed at the bottom of the support platform 1, and a locking assembly for locking the buffer plate 7 is disposed within the mounting box 10. In the locked state, the buffer plate 7 is retracted into the bottom of the support platform 1 to reduce airdrop wind resistance. In the unlocked state, the buffer plate 7 moves downward relative to the support platform 1 to exert a buffering effect.

[0032] This invention, through the cooperation of the locking component and the storage groove 101 at the bottom of the support platform 1, allows the buffer plate 7 to be stored in the storage groove 101 in the locked state, significantly reducing the overall size and windward area of ​​the airdrop platform. This effectively reduces the wind load and aerodynamic interference during the airdrop descent, ensuring that the platform maintains a stable descent trajectory. It solves the technical problem that existing airdrop platforms are too large in size and prone to deviating from the preset landing point due to the layout of the buffer structure, greatly improving the delivery accuracy and enhancing the adaptability to actual application scenarios.

[0033] In this embodiment, preferably, a piston 4 is slidably installed inside the mounting cylinder 3. The buffer assembly includes a spring damper 5 and a connecting column 6. The top end of the spring damper 5 is fixedly connected to the piston 4, and the bottom end of the spring damper 5 is fixedly connected to the connecting column 6. The connecting column 6 penetrates the support platform 1, and the bottom end of the connecting column 6 is fixedly connected to the buffer plate 7. The connecting column 6 and the support platform 1 are slidably engaged. The top end of the mounting cylinder 3 is provided with an opening, and a one-way valve 9 is provided inside the opening. The one-way valve 9 allows outside air to enter the buffer through the opening. Inside the mounting cylinder 3, the air inside the mounting cylinder 3 cannot be discharged outward through the one-way valve 9; the one-way valve 9 includes a valve plate 901, which rotates towards the inside of the mounting cylinder 3 when the one-way valve 9 is open; a return torsion spring is provided on the one-way valve 9, which provides a pre-tightening force for the reverse sealing of the valve plate 901; an air hole 902 is provided on the valve plate 901, and when the piston 4 moves upward, the air inside the mounting cylinder 3 is discharged through the air hole 902; the diameter of the air hole 902 is 3-10mm, preferably 5mm, and forms stable damping through the throttling effect.

[0034] When airdropping supplies, the airdrop box 2 is connected to the parachute, and then the airdrop box 2 is dropped towards the target location. As the airdrop box 2 falls downwards, during the drop, the locking component locks the buffer plate 7 into the storage slot 101 at the bottom of the support platform 1, reducing the overall volume of the airdrop platform and thus reducing the aerodynamic interference of external wind on the airdrop platform. When the airdrop platform is about to land (by a preset trigger time via a timer module or by real-time detection triggering via an altitude sensor), the locking component releases the lock on the buffer plate 7, allowing the buffer plate 7 to move downwards relative to the support platform 1 under its own weight. This causes the spring damper 5 to extend from the mounting cylinder 3. When the spring damper 5 moves downwards, it drives the piston 4 to move downwards relative to the mounting cylinder 3. When the piston 4 moves downwards, a negative pressure is formed inside the mounting cylinder 3, which overcomes the force of the reset torsion spring and opens the valve plate 901, allowing outside air to pass through the valve plate. 901 quickly enters the mounting cylinder 3; when piston 4 moves downward to its limit position (blocked by the limiting ring 17), spring damper 5 and buffer plate 7 stop moving downward; when the airdrop platform lands, buffer plate 7 contacts the ground first. At this time, spring damper 5 is compressed under the impact load to achieve primary buffering. At the same time, piston 4 moves upward synchronously, extending the buffer stroke to form secondary buffering; when piston 4 moves upward, valve plate 901 closes under the action of return torsion spring and positive pressure inside the cylinder. Air in mounting cylinder 3 can only be discharged through air hole 902 on valve plate 901. Since the diameter of air hole 902 is small, the gas is slowly discharged through the throttling effect of the small orifice, so that piston 4 moves upward to form stable damping, avoiding the spring damper 5 from rebounding too quickly and causing secondary impact. Through the synergistic effect of piston 4 damping and spring damper 5, the overall buffering effect is significantly improved.

[0035] In this embodiment, preferably, the bottom of the support platform 1 is provided with a storage groove 101, which is used to accommodate the buffer plate 7; so that the buffer plate 7 can be completely stored in the support platform 1, thereby minimizing the wind resistance coefficient during the airdrop process.

[0036] In this embodiment, preferably, each of the four corners of the top of the airdrop box 2 is fixedly installed with a connecting ring 16, and the airdrop box 2 is connected to the sling of the parachute through the connecting ring 16.

[0037] In this embodiment, preferably, multiple sets of ball bearings 8 are embedded and installed on the lower surface of the buffer plate 7. The multiple sets of ball bearings 8 are located at the four corners of the buffer plate 7. The ball bearings 8 are made of hard alloy, with a diameter of 30-60mm and a load-bearing capacity of not less than 200kg / each. The ball bearings 8 are used to achieve horizontal buffering after the airdrop platform lands: when the airdrop platform lands, before the buffer plate 7 is fully retracted into the storage slot 101 of the support platform 1, if there is residual horizontal velocity on the platform, the ball bearings 8 will contact the ground to form rolling friction, which can cause the platform to move horizontally and buffer, effectively preventing the airdrop box 2 from tipping over due to horizontal velocity; when the buffer plate 7 is fully inserted into the storage slot 101 under the impact, the bottom edge of the support platform 1 contacts the ground, and the sliding friction between the support platform 1 and the ground is used to stop the platform and prevent excessive displacement.

[0038] This invention utilizes the coordinated design of the spring damper 5, the piston 4 inside the mounting cylinder 3, the one-way valve 9, and the air hole 902 to form a dual buffering mechanism during landing, consisting of a primary buffering mechanism of spring compression and a secondary buffering mechanism of gas throttling. This avoids secondary impacts caused by spring rebound and significantly improves the impact resistance. The ball bearings 8 on the lower surface of the buffer plate 7 can absorb residual horizontal velocity through rolling friction, preventing the airdrop box 2 from tipping over. Combined with the sliding friction at the bottom edge of the support platform 1, this achieves braking and further ensures the safety of the supplies.

[0039] In this embodiment, preferably, the buffer plate 7 has a groove 701, which is adapted to the mounting box 10. When the buffer plate 7 is located in the storage slot 101, the mounting box 10 is located in the groove 701. The locking assembly includes an electric push rod 11 and a locking block 12. The electric push rod 11 is fixedly installed inside the mounting box 10, and the locking block 12 penetrates the side wall of the mounting box 10 and slides with the mounting box 10. The output end of the electric push rod 11 is fixedly connected to the locking block 12. The buffer plate 7 A slot 702 is provided on the top, located next to the groove 701. The locking block 12 is adapted to the slot 702. When the locking component locks the buffer plate 7, the locking block 12 is inserted into the slot 702 to lock the buffer plate 7. An inclined surface 1201 is provided on the top side of the locking block 12 away from the electric push rod 11. When the buffer plate 7 is located in the storage groove 101, during the process of the locking block 12 being inserted into the slot 702, the inclined surface 1201 can push the buffer plate 7 upward by one end, so that the ball 8 is separated from the ground.

[0040] In this embodiment, preferably, the mounting box 10 contains a control box 13. The control box 13 contains a control module (using an STM32F103 series microcontroller as the main control chip), a battery (a 12V lithium polymer battery with a capacity of 2000mAh, supporting repeated charging), and a timing module (using a DS3231 high-precision real-time clock module with a timing error ≤1s / day). The battery is electrically connected to the control module, timing module, and electric push rod 11 via a voltage regulator circuit, forming an independent power supply system. The control module, as the core control unit, receives trigger signals and drives the electric push rod 11 to move. This is done on the airdrop platform. Previously, the timing module presets the delay unlocking time (based on the airdrop height, such as a 30-second delay for a height of 1000m). The timing module transmits the time signal to the control module in real time. When the preset time is reached, the control module outputs a high-level signal to drive the output end of the electric push rod 11 to retract, thus unlocking the device. In addition, the control module supports dual control modes: one is manual operation via a touch button on the support platform 1 (for ground debugging), and the other is remote unlocking via a wireless communication module (using a 433MHz RF module with a communication distance ≥1000m) to receive wireless commands from the remote control device, thereby improving operational flexibility.

[0041] In this embodiment, preferably, a plurality of adjusting screws 14 are threadedly installed on the support platform 1. The adjusting screws 14 pass through the support platform 1, and a knob 15 is fixedly installed at the top of the adjusting screws 14. When the airdrop platform is on the ground, if it is necessary to manually move the airdrop platform, the plurality of adjusting screws 14 can be rotated by the knob 15 to move the adjusting screws 14 downward, thereby pushing the buffer plate 7 out of the storage groove 101 so that the ball bearing 8 contacts the ground and pushes the support platform 1 upward to separate it from the ground, thereby enabling the airdrop platform to move.

[0042] In this embodiment, preferably, a limiting ring 17 is fixedly installed at the bottom of the inner cavity of the mounting cylinder 3. By setting the limiting ring 17, the movement of the piston 4 can be limited to prevent the piston 4 from coming out of the mounting cylinder 3.

[0043] Working principle: Before deployment, materials need to be secured and the system preset to lay the foundation for stable airdrop. After the staff loads the materials to be deployed into the airdrop box 2, it is firmly connected to the parachute slings through the connecting rings 16 at the four corners of the top of the box, ensuring that the box and the parachute move synchronously during deployment. At the same time, the unlocking delay is preset by the timer module in the control box 13 (e.g., 30s for a height of 1000m), and remote control can also be used as a backup plan. At this time, the locking component is in working state. The electric push rod 11 drives the card block 12 to insert into the card slot 702 on the buffer plate 7. The inclined surface 1201 of the card block 12 simultaneously lifts the buffer plate 7, causing the ball bearing 8 to leave the ground and allowing the buffer plate 7 to be completely stored in the storage slot 101 of the support platform 1, minimizing the platform volume to reduce wind resistance.

[0044] After the platform is deployed, the compact shape formed by the buffer plate 7 greatly reduces aerodynamic interference. With the traction of the parachute, the platform always maintains a stable descent trajectory. After reaching the preset conditions, the buffer system automatically unlocks and completes the extension action. When the timing module detects that the preset delay has been reached, or when the control module receives a remote command trigger signal, it will immediately drive the electric push rod 11 to retract, causing the locking block 12 to exit the buffer plate 7 slot 702 and unlock. Under its own gravity, the buffer plate 7 drives the connecting column 6 and the spring damper 5 to move down synchronously. When the piston 4 slides down with the spring damper 5, the negative pressure formed in the mounting cylinder 3 overcomes the reset torsion spring force and opens the one-way valve 9. Outside air quickly enters the cylinder to ensure that the buffer plate 7 extends smoothly until the piston 4 is blocked by the limit ring 17 at the bottom of the mounting cylinder 3. The buffer plate 7 stops moving down and remains in the extended state.

[0045] Upon landing, the impact is absorbed and the materials are protected through a dual buffer and horizontal anti-tipping design. After the buffer plate 7 touches the ground first, the impact load directly causes the spring damper 5 to compress, completing the first stage of impact absorption. The compression of the spring damper 5 simultaneously drives the piston 4 to move upward. The one-way valve 9 closes under the action of the return torsion spring and the positive pressure inside the cylinder. The air inside the cylinder can only be discharged through the air hole 902 on the valve plate 901. The throttling effect forms a stable damping that causes the piston 4 to move upward slowly, achieving the second stage of buffering and avoiding the spring rebound that causes a secondary impact. If there is a horizontal residual velocity during landing, the hard alloy balls 8 on the buffer plate 7 form rolling friction to achieve horizontal buffering. When the buffer plate 7 is completely retracted into the storage groove 101, the sliding friction between the bottom edge of the support platform 1 and the ground completes the braking, preventing excessive displacement of the platform.

[0046] After the airdrop is completed, the platform can be reused through a convenient design. The staff can rotate the adjustment screw 14 knob 15 on the support platform 1 to make the adjustment screw 14 move down and push out the buffer plate 7, so that the ball bearing 8 touches the ground and lifts the support platform 1 off the ground, making it easy to manually push the platform to move. The battery in the control box 13 supports repeated charging. There are no easily worn-out designs for each core component. After checking and confirming that the locking component, buffer component and other functions are normal, the platform can be put back into the airdrop mission, achieving the design goal of reuse.

[0047] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. A repeatable small airdrop platform with an impact-resistant structure, comprising a support platform (1), an airdrop box (2) fixedly mounted on the upper surface of the support platform (1), and a buffer plate (7) mounted below the support platform (1), characterized in that: Mounting cylinders (3) are fixedly installed at the four corners of the upper surface of the support platform (1). A buffer assembly is slidably installed inside the mounting cylinder (3). The bottom end of the buffer assembly passes through the support platform (1) and is connected to the buffer plate (7). A mounting box (10) is fixedly installed at the bottom of the support platform (1). A locking assembly for locking the buffer plate (7) is installed inside the mounting box (10). In the locked state, the buffer plate (7) is stored at the bottom of the support platform (1) to reduce the air drop wind resistance. In the unlocked state, the buffer plate (7) moves downward relative to the support platform (1) to play a buffering role.

2. The repeatable small airdrop platform with an impact-resistant structure according to claim 1, characterized in that: A piston (4) is slidably installed inside the mounting cylinder (3). The buffer assembly includes a spring damper (5) and a connecting column (6). The top end of the spring damper (5) is fixedly connected to the piston (4), and the bottom end of the spring damper (5) is fixedly connected to the connecting column (6). The connecting column (6) passes through the support platform (1), and the bottom end of the connecting column (6) is fixedly connected to the buffer plate (7). The connecting column (6) and the support platform (1) are in sliding cooperation.

3. A repeatable small airdrop platform with an impact-resistant structure according to claim 2, characterized in that: The top of the mounting cylinder (3) is provided with an opening, and a one-way valve (9) is provided in the opening. The one-way valve (9) allows outside air to enter the mounting cylinder (3) through the opening, and the air in the mounting cylinder (3) cannot be discharged out through the one-way valve (9).

4. A repeatable small airdrop platform with an impact-resistant structure according to claim 3, characterized in that: The one-way valve (9) includes a valve plate (901). When the one-way valve (9) is opened, the valve plate (901) rotates toward the inside of the mounting cylinder (3). The valve plate (901) is provided with an air hole (902). When the piston (4) moves upward, the air in the mounting cylinder (3) is discharged through the air hole (902).

5. A repeatable small airdrop platform with an impact-resistant structure according to claim 1, characterized in that: The bottom of the support platform (1) is provided with a storage groove (101) for accommodating the buffer plate (7).

6. A repeatable small airdrop platform with an impact-resistant structure according to claim 1, characterized in that: Connecting rings (16) are fixedly installed at the four corners of the top of the airdrop box (2), and the airdrop box (2) is connected to the sling of the parachute through the connecting rings (16).

7. A repeatable small airdrop platform with an impact-resistant structure according to claim 1, characterized in that: Multiple sets of balls (8) are embedded in the lower surface of the buffer plate (7), and the multiple sets of balls (8) are located at the four corners of the buffer plate (7).

8. A repeatable small airdrop platform with an impact-resistant structure according to claim 1, characterized in that: The buffer plate (7) has a groove (701) that is adapted to the mounting box (10). When the buffer plate (7) is located in the storage slot (101), the mounting box (10) is located in the groove (701).

9. A repeatable small airdrop platform with an impact-resistant structure according to claim 8, characterized in that: The locking assembly includes an electric push rod (11) and a locking block (12). The electric push rod (11) is fixedly installed inside the mounting box (10). The locking block (12) penetrates the side wall of the mounting box (10) and slides with the mounting box (10). The output end of the electric push rod (11) is fixedly connected to the locking block (12). The buffer plate (7) has a slot (702) located next to the groove (701). The locking block (12) is adapted to the slot (702). When the locking assembly locks the buffer plate (7), the locking block (12) is inserted into the slot (702) to lock the buffer plate (7).

10. A repeatable small airdrop platform with an impact-resistant structure according to claim 1, characterized in that: Multiple adjusting screws (14) are threaded onto the support platform (1). The adjusting screws (14) pass through the support platform (1), and a knob (15) is fixedly installed at the top of the adjusting screws (14).

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