Parachute-free air-drop platform of transport helicopter

Abstract

The invention relates to the aerospace technology and military field, in particular to a transport helicopter parachute-free air-drop platform which comprises a main platform, side platforms, buffering straight legs and buffering inclined legs, the main platform is of a square structure, the two ends of the main platform are hinged to the inner ends of the side platforms on the two sides through a plurality of supporting columns, and the main platform, the side platforms and the buffering straight legs form a Z-shaped structure; the buffer straight legs are arranged on the front side and the rear side of the bottom of the side platform; main supports are arranged on the front sides and the rear sides of the tops of the side platforms, the top ends of the buffering inclined legs are hinged to the tops of the main supports, and the bottom ends of the buffering inclined legs can stretch out in the inclined downward direction. And a plurality of combined air bags are arranged at the bottom of the main platform. Through a multi-stage buffering system formed by the buffering straight legs, the buffering inclined legs and the combined air bags, impact energy in the vertical direction and the horizontal direction can be efficiently absorbed, the landing acceleration is controlled within the equipment safety range, and the integrity of air-dropped materials, especially precise instruments and fragile products is guaranteed.

Description

Technical Field

[0001] This invention relates to the fields of aerospace technology and military, and in particular to a parachuteless airdrop platform for transport helicopters. Background Technology

[0002] Traditional transport aircraft airdrops rely on parachutes (including ordinary parachutes, drag chutes, and pilot chutes) to achieve deceleration and attitude control. However, this approach has revealed many bottlenecks in actual combat and engineering applications. The parachute deployment process takes time, resulting in long airborne time for the airdropped items (usually tens of seconds to several minutes). These items are susceptible to airflow interference, leading to large deviations in landing points (conventional parachute drops can have deviations of up to hundreds of meters). Furthermore, the interval between each drop must meet the requirement of preventing parachute lines from tangling, making it difficult to achieve dense and rapid delivery. Under complex weather conditions such as strong winds, low temperatures, and high altitudes, parachutes are prone to problems such as deployment failure, parachute line tangling, and unstable deceleration. In extreme environments, the success rate of delivery is less than 60%. The long airborne time of the airdropped items makes them easy to detect by enemy radar and optical reconnaissance equipment, increasing the risk of mission exposure. Moreover, the trajectory cannot be adjusted during the parachute descent, making it difficult to evade enemy interception fire.

[0003] Compared to parachuteless airdrops, parachuteless airdrops are free from the air resistance constraints of parachutes, significantly reducing loiter time and improving delivery efficiency; they are not limited by parachute performance and can be delivered under adverse conditions such as complex weather and terrain; their short loiter time makes them less susceptible to detection and interception, making them suitable for tactical covert delivery missions.

[0004] Therefore, there is an urgent need for a parachute-free airdrop platform for transport helicopters that can shorten the time spent in the air, improve delivery efficiency and stealth. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a parachute-free airdrop platform for transport helicopters. Through a multi-level buffer system consisting of a straight buffer leg, a slanted buffer leg, and a combined airbag, it can efficiently absorb the impact energy in the vertical and horizontal directions, control the landing acceleration within the safe range of the equipment, and ensure the integrity of airdropped materials, especially precision instruments and fragile items.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows: The present invention discloses a parachute-free airdrop platform for a transport helicopter, including a main platform, side platforms, buffer straight legs, and buffer inclined legs. The main platform has a square structure, and its two ends are hinged to the inner ends of the side platforms on both sides through a plurality of support columns. The three are connected to form a "Z" - shaped structure. An inclined beam is connected between the lower outer wall of the middle support column and the bottom of the outer end of the side platform. The upper inner walls of the front and rear support columns are hinged to the top sides of the main platform through inclined support columns; the buffer straight legs are provided on the front and rear sides of the bottom of the side platform, and the buffer straight legs can extend downward along the vertical direction; main brackets are provided on the front and rear sides of the top of the side platform, and the top end of the buffer inclined leg is hinged to the top of the main bracket, and the bottom end of the buffer inclined leg can extend obliquely downward; a plurality of combined air bags are provided at the bottom of the main platform.

[0007] Four support column tower buckles for hinging with the bottom ends of the support columns are equidistantly provided on the end faces of both ends of the main platform. The support column tower buckle includes a bottom block, an ear plate, a tower plate pin shaft, and a support column tower plate. The inner ends of two square - structured bottom blocks are connected to the lower part of the main platform end face. A lower semi - circular groove for placing the support column rotating shaft at the bottom of the support column is provided in the middle of the top of the bottom block; two ear plates are provided above the main platform end face. The two ends of the tower plate pin shaft respectively pass through the ear plates on both sides and are fixedly connected to the inner end of the support column tower plate. The support column tower plate is a square structure with a semi - circular rear end, and an upper semi - circular groove is provided in the middle of its bottom. The upper semi - circular groove and the lower semi - circular groove form a shaft hole for the rotation of the support column rotating shaft; the ends of the bottom block and the support column tower plate are connected by a quick - release locking mechanism.

[0008] The quick - release locking mechanism includes a retaining groove, a retaining hook, a limit nut, a rotating body, a base, a rotating shaft, and a rotating rod. The base has a "convex" - shaped structure and is fixed to the end of the bottom block. The rotating body has a yoke - shaped structure, and its top end is hinged to the outer end of the base through the rotating shaft. A rotating hole for the rotating rod to pass through is provided below the outer wall of the rotating body. Both ends of the rotating rod are provided with retaining hook holes for both ends of a "U" - shaped retaining hook to pass through along the radial direction. The outer wall of the end of the retaining hook is provided with an external thread for connecting the limit nut, and limit nuts are connected to the outer walls of the retaining hooks on both sides of the rotating rod; the retaining groove is arranged at the outer end of the support column tower plate, and the retaining groove has a hook - shaped structure, and a groove for matching and clamping with the top end of the retaining hook is provided in the middle of its top.

[0009] The bottom end of the diagonal brace H is hinged to the top sides of the main platform via diagonal brace latches. Each latch includes an upper latch, a lower latch, a latch pin, a latch plate, a latch plate pin lock, a hinge, and a locking plate. One end of the hinge is connected to the top of the main platform, and the other end is connected to the inner end of the upper latch. The upper latch has a "U"-shaped structure, with its outer ends hinged to the inner ends of the latch plate via latch pins. A semi-circular groove is provided in the center of the bottom of the upper latch. The lower buckle is fixed to the main platform on the outside of the hinge in a "U" shape. The top center of the lower buckle has a lower semicircular groove. The upper and lower semicircular grooves of the buckle form a pivot hole for the bottom pivot shaft of the diagonal brace. The outer end of the lower buckle has a locking plate. The middle of the locking plate has a locking hole for locking with the "U" shaped buckle plate. The buckle plate has an "L" shaped structure, and the lower front end has a locking plate hole for the locking plate to pass through.

[0010] The buffer straight leg includes an energy-absorbing unit group, a connecting plate, and a foot pad. The connecting plate has a square structure, and its top is connected to the front and rear sides of the bottom of the side platform. The top of the energy-absorbing unit group is connected to the bottom of the connecting plate, and the bottom of the energy-absorbing unit group is connected to the foot pad. The buffer inclined leg includes a hinge rod, an energy-absorbing unit group, a foot pad, and a buffer sleeve. The hinge rod has a square structure and a hinge ring at its end. The top outer side of the main support has a yoke-shaped hinge seat. The hinge ring is hinged to the hinge seat by a pin. The bottom of the hinge rod is connected to the top of the energy-absorbing unit group, and the bottom of the energy-absorbing unit group is connected to the foot pad. Buffer sleeves are connected between the upper outer wall of the main support and the lower inner wall of the hinge rod, and between the outer corner of the side platform and the middle of the inner wall of the energy-absorbing unit group.

[0011] The energy-absorbing unit group includes several energy-absorbing units, cables, and pyrotechnic devices. Several of the energy-absorbing units are folded and fixed by the cables, and the cables are equipped with pyrotechnic devices for cutting and unlocking.

[0012] The energy-absorbing unit includes a one-dimensional deployable mechanism and a buffer airbag. The one-dimensional deployable mechanism includes an upper platform, a lower platform, a sodium azide inflator, a platform exhaust port, an upper branch rod, and a lower branch rod. The upper and lower platforms are parallel to each other. The top end of the upper branch rod is hinged to a revolute joint at the bottom corner of the upper platform. The bottom end of the upper branch rod is hinged to a revolute joint at the middle of the top end of the lower branch rod. The bottom end of the lower branch rod is hinged to a revolute joint at the top corner of the lower platform. A sodium azide inflator for inflating the buffer airbag is provided at the middle of the top of the upper platform. The buffer airbag is located between the middle of the upper and lower platforms. The platform exhaust port is provided at the middle of the outer wall of the upper and lower platforms. The centers of the holes of the upper and lower branch rods are offset, and the axes of the revolute joints at the top and bottom ends of adjacent upper and lower branch rods are perpendicular.

[0013] The buffer sleeve includes a cylindrical body, a tie rod, and an aluminum honeycomb. The cylindrical body is a hollow cylindrical structure with one open end. The aluminum honeycomb is arranged in a ring structure inside the cylindrical body. The aluminum honeycomb has an axial through hole for the tie rod. The inner end of the tie rod passes through the through hole of the aluminum honeycomb and contacts the middle of the inner wall of the cylindrical body. The closed end of the cylindrical body is hinged to the upper part of the outer wall of the main support or the outer corner of the side platform. The free end of the tie rod is hinged to the lower part of the inner wall of the hinged rod or to the middle of the inner wall of the energy absorption unit group through an elastic rope.

[0014] The combined airbag includes a main airbag, an auxiliary airbag, an inner airbag, an air inlet, and an exhaust port. The main airbag has a hollow square structure with an air inlet in the middle of its bottom. The outer wall of the main airbag is a sloping surface that slopes downwards and outwards from the bottom. The auxiliary airbag is connected to the outer wall of the main airbag. The connection surface between the auxiliary airbag and the main airbag and the outer wall of the auxiliary airbag are provided with several exhaust ports. The inner airbag has a hollow cylindrical structure between the middle of the front inner wall and the rear inner wall of the main airbag. The air inlet is connected to an inflation device located at the bottom of the main platform.

[0015] The top outer wall of the main support is connected to several reinforcing brackets, the bottom of which is fixed to the side platform. The front and rear ends of the bottom of the side platform are connected to the top of the side platform caster rod, and the bottom of the side platform caster rod is connected to a side platform caster. The front and rear sides of the bottom of the main platform are connected to the top of the main platform caster rod, and the bottom of the main platform caster rod is connected to a main platform caster. The main platform caster and the side platform caster are at the same height.

[0016] The beneficial effects of this invention are as follows: (1) The present invention uses a multi-level buffer system consisting of a buffer straight leg, a buffer angled leg and a combined airbag to efficiently absorb the impact energy in the vertical and horizontal directions (more than 90%), control the landing acceleration within the safe range of the equipment (≤15g, and can be reduced to ≤6g for precision equipment), and ensure the integrity of airdropped materials, especially precision instruments and fragile items.

[0017] (2) The present invention has a compact structure and is easy to transport and store: the platform has two states: folded and unfolded. During transportation, the outriggers and airbags can be folded and stored, which significantly reduces the space occupied; when unfolded, it can be quickly unlocked by pyrotechnics to achieve rapid deployment. (3) Quick disassembly design of the present invention: The main platform and the support column adopt a quick-release locking mechanism, and the diagonal support column is fixed by the diagonal column tower buckle. All are designed to be quick-unlockable, which facilitates rapid unloading after landing; (4) The present invention has stable posture and adapts to complex terrain: through the combination of buffer slanted legs and buffer straight legs, combined with the limiting effect of buffer sleeves and elastic ropes, it effectively suppresses side roll and tumbling during landing, ensuring that the platform lands smoothly; (5) The invention has strong environmental adaptability: the umbrella-less design makes it unrestricted by weather conditions and can work stably in harsh environments such as strong winds and low temperatures, thereby improving the delivery success rate and mission reliability.

[0018] (6) Modularity and scalability of the present invention: The number of energy-absorbing units, outriggers and airbag layout can be flexibly adjusted according to the weight and volume of the airdropped object, and have good adaptability and scalability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the retracted state of the transport helicopter parachute-free airdrop platform in this invention; Figure 2 This is a schematic diagram of the parachute-free airdrop platform of the transport helicopter in the present invention in its folded-up state (1 / 2 configuration). Figure 3 This is a schematic diagram of the folded-up 1 / 4 configuration of the parachute-free airdrop platform of the transport helicopter in this invention. Figure 4 This is a schematic diagram of the deployed state of the transport helicopter parachute-less airdrop platform in this invention; Figure 5 This is a schematic diagram of the 1 / 2 unfolded state of the parachute-free airdrop platform of the transport helicopter in this invention. Figure 6 This is a schematic diagram of the 1 / 4 unfolded state of the parachute-free airdrop platform of the transport helicopter in this invention. Figure 7 This is a schematic diagram of the deployed state of the platform legs on one / 2 side in this invention; Figure 8 This is a schematic diagram of the retracted state of the platform support leg on one / 2 side in this invention; Figure 9 This is a schematic diagram of the retracted state structure of the buffer slant leg in this invention; Figure 10 This is a schematic diagram of the buffering process of the energy absorption unit in this invention; Figure 11 This is a schematic diagram of the locking state structure of the support column tower buckle and quick-release locking mechanism in this invention; Figure 12 This is a schematic diagram of the unlocked state structure of the support column tower buckle and quick-release locking mechanism in this invention; Figure 13 This is a schematic diagram of the locking state structure of the inclined column tower buckle in this invention; Figure 14 This is a schematic diagram of the unlocked state structure of the inclined column tower buckle in this invention; Figure 15This is a schematic diagram of the one-dimensional unfolding mechanism in this invention; Figure 16 This is a cross-sectional schematic diagram of the buffer sleeve in this invention; Figure 17 This is a schematic diagram of the combined airbag structure in this invention.

[0020] In the attached diagram: 1. Baffle groove; 2. Baffle hook; 3. Limiting nut; 4. Rotating body; 5. Upper tower buckle; 6. Lower tower buckle; 7. Tower buckle pin; 8. Tower buckle plate; 9. Tower buckle plate pin lock; 10. One-dimensional deployable mechanism; 11. Buffer airbag; 12. Cylinder; 13. Tie rod; 14. Aluminum honeycomb; 15. Main airbag; 16. Auxiliary airbag; 17. Inner airbag; 18. Air inlet; 19. Exhaust port; 20. Base block; 21. Ear plate; 22. Tower plate pin; 23. Support column tower plate; 24. Support column pivot; 25. Base; 26. Rotating shaft; 27. Rotating rod; 28. Hinge; 29. ​​Locking plate; 30. Side platform casters; 31. Main platform casters; 101. Upper platform; 103. Lower platform; 104. Sodium azide inflator; 105. Platform exhaust port; 106. Upper support rod; 107. Lower support rod; A. Main platform; B. Side platform; C. Buffer straight leg; D. Buffer angled leg; E. Support column; F. Combined airbag; G. Inclined beam; H. Inclined brace column; I. Inclined column tower buckle; J. Main support; K. Reinforced support; L. Buffer sleeve; M. Connecting plate; N. Energy absorption unit; O. Cable; P. Pyrotechnics; Q. Elastic rope; R. Support column tower buckle; S. Quick-release locking mechanism; T. Foot pads. Detailed Implementation

[0021] The present invention will be further described below: Please see Figure 1-17 , This invention discloses a parachute-free airdrop platform for transport helicopters, such as... Figure 1-5As shown, the system includes a main platform A, a side platform B, a buffer straight leg C, and a buffer inclined leg D. The main platform A has a square structure, with its two ends hinged to the inner ends of the side platforms B via several support columns E. The three components are connected to form a "Z" shape. A diagonal beam G connects the lower outer wall of the middle support column E to the bottom outer end of the side platform B. The upper inner walls of the front and rear support columns E are hinged to the top sides of the main platform A via diagonal bracing columns H. The buffer straight leg C is located on the front and rear sides of the bottom of the side platform B, and the buffer straight leg C can extend downwards vertically. A main support J is located on the front and rear sides of the top of the side platform B. The top of the buffer inclined leg D is hinged to the top of the main support J, and the bottom of the buffer inclined leg D can extend downwards at an angle. The bottom of the main platform A... The unit is equipped with several combined airbags F. Through a multi-level buffer system consisting of straight buffer legs C, angled buffer legs D, and combined airbags F, it can efficiently absorb more than 90% of the impact energy in the vertical and horizontal directions, controlling the landing acceleration within the equipment's safe range (≤15g, which can be reduced to ≤6g for precision equipment), ensuring the integrity of airdropped supplies, especially precision instruments and fragile items. The "Z"-shaped platform structure composed of the main platform A, support column E, and side platform B, combined with the downward-extending angled buffer legs D, forms a wide landing support surface, effectively preventing the platform from tipping over or sliding on rough terrain or during inclined landings, ensuring the stability of the cargo's attitude. The inclined beam G and inclined support column H ensure the stability of the "Z"-shaped platform structure composed of the main platform A, support column E, and side platform B, ensuring the stability of the platform's descent.

[0022] Furthermore, such as Figure 11 and Figure 12As shown, four support column latches R are evenly spaced at both ends of the main platform A for hinged connection to the bottom end of the support column E. Each support column latch R includes a base block 20, ear plates 21, a tower plate pin 22, and a support column tower plate 23. The inner ends of two square-structured base blocks 20 are connected to the lower part of the end face of the main platform A. A lower semi-circular groove is provided in the center of the top of the base block 20 for placing the bottom support column pivot 24 of the support column E. Two ear plates 21 are located above the end face of the main platform A. The two ends of the tower plate pin 22 pass through the ear plates 21 on both sides and are fixedly connected to the inner end of the support column tower plate 23. The support column tower plate 23 is a square structure with a semi-circular rear end. It has an upper semi-circular groove in the middle of its bottom. The upper and lower semi-circular grooves form a shaft hole for the rotation of the support column shaft 24. The ends of the bottom block 20 and the support column tower plate 23 are connected by a quick-release locking mechanism S. The inner end of the support column tower plate 23 is hinged to the ear plate 21 through the tower plate pin 22. When the support column tower plate 23 is rotated to a state parallel to the bottom block 20, the upper semi-circular groove at the bottom of the support column tower plate 23 and the lower semi-circular groove at the top of the bottom block 20 form a shaft hole for the rotation of the support column shaft 24, thereby completing the quick hinge connection between the bottom end of the support column E and both ends of the main platform A.

[0023] Furthermore, such as Figure 11 and Figure 12As shown, the quick-release locking mechanism S includes a retaining groove 1, a retaining hook 2, a limit nut 3, a rotating body 4, a base 25, a rotating shaft 26 and a rotating rod 27. The base 25 has a "convex" structure and is fixed to the end of the base block 20. The rotating body 4 has a yoke-shaped structure, and its top end is hinged to the outer end of the base 25 through the rotating shaft 26. A rotating hole for the rotating rod 27 to pass through is provided below the outer wall of the rotating body 4. Hook holes for the two ends of the U-shaped retaining hook 2 to pass through are provided along the radial direction at both ends of the rotating rod 27. External threads for connecting the limit nut 3 are provided on the outer wall of the end of the retaining hook 2, and the limit nut 3 is connected to the outer walls of the retaining hooks 2 on both sides of the rotating rod 27; the retaining groove1 is provided at the outer end of the support column tower plate 23. The retaining groove 1 has a hook-shaped structure, and a groove for matching and clamping with the top end of the retaining hook 2 is provided in the middle of its top. The retaining groove 1 is fixed to the outer end of the support column tower plate 23 by screws. The retaining hook 2, the limit nut 3 and the rotating body 4 are integrated. The rotating rod 27 can rotate below the rotating body 4. The two ends of the retaining hook 2 respectively pass through the hook holes at both ends of the rotating rod 27. One end of the retaining hook 2 has its own thread and is combined with the limit nut 3, so that the tightness of the retaining hook 2 can be adjusted through the limit nut 3; when the main platform A and the support column E are initially locked by the support column tower buckle R, then the retaining hook 2 located on the side of the middle platform is initially connected to the retaining groove 1. After the retaining hook 2 and the retaining groove 1 are in a predetermined position, the limit nut 3 is adjusted to make the whole retaining hook 2 move backward relative to the retaining groove 1. When there is no relative movement between the retaining hook 2 and the retaining groove 1, the overall locking is completed. When the platform lands and the airdropped materials are disassembled, the quick-release locking mechanism S only needs to use a certain force to拨动 the rotating body 4 part, and the quick disassembly of this structure can be realized.

[0024] Further, as Figure 13 and Figure 14 It should be noted that there is an unclear word "拨动" in the original text which may need further confirmation for a more accurate translation. Here it is tentatively translated as "拨动".As shown, the bottom end of the diagonal brace H is hinged to the top sides of the main platform A via diagonal brace latch I. The diagonal brace latch I includes an upper latch 5, a lower latch 6, a latch pin 7, a latch plate 8, a latch plate pin lock 9, a hinge 28, and a locking plate 29. One end of the hinge 28 is connected to the top of the main platform A, and the other end of the hinge 28 is connected to the inner end of the upper latch 5. The upper latch 5 has a "U" shaped structure, and its outer ends are connected to the latch via the latch pin 7 on both sides. The inner end of plate 8 is hinged, and the bottom center of the upper buckle 5 is provided with an upper semi-circular groove; the lower buckle 6 is fixed to the main platform A on the outside of the hinge 28 in a "U" shape, and the top center of the lower buckle 6 is provided with a lower semi-circular groove. The upper and lower semi-circular grooves of the buckle form a shaft hole for the bottom shaft of the diagonal brace H to rotate. The outer end of the lower buckle 6 is provided with a locking plate 29, and the middle of the locking plate 29 is provided with a hole for the "U" shaped... The "L"-shaped tower buckle plate 8 is connected to the lock hole of the locking plate 29. The tower buckle plate 8 has an "L"-shaped structure, and its front end has a locking plate hole for the locking plate 29 to pass through. One end of the hinge 28 is fixed to the main platform A with a screw, and the other end is connected to the upper tower buckle 5 with a screw, so as to realize the flip locking and unlocking of the upper tower buckle 5. The lower tower buckle 6 is fixed to the main platform A at the position corresponding to the upper tower buckle 5 to ensure the perfect fit of the upper and lower tower buckles. When the diagonal support column H is initially locked by the diagonal column tower buckle I... Subsequently, the upper tower buckle 5, connected to the tower buckle plate 8 via the tower buckle pin 7, and the lower tower buckle 6's locking plate 29 are combined for limiting and locking. The tower buckle plate 8 is designed with locking plate holes corresponding to the locking plate 29, allowing the locking plate 29 to pass through the tower buckle plate 8, completing the limiting and locking combination of the locking plate 29 and the tower buckle plate 8, as well as the initial locking connection. The locking plate 29 is designed with locking holes, at which point a U-shaped tower buckle pin 9 is used, allowing the tower buckle pin 9 to pass through the locking hole of the locking plate 29 to complete the final locking. After the platform lands, disassembly only requires pulling out the tower buckle pin 9, and then rotating the tower buckle plate 8 and the upper tower buckle 5.

[0025] Furthermore, such as Figure 3 As shown, the buffer straight leg C includes an energy-absorbing unit group, a connecting plate M, and a foot pad T. The connecting plate M has a square structure, and its top is connected to the front and rear sides of the bottom of the side platform B. The top of the energy-absorbing unit group is connected to the bottom of the connecting plate M, and the bottom of the energy-absorbing unit group is connected to the foot pad T. The buffer inclined leg D includes a hinge rod, an energy-absorbing unit group, a foot pad T, and a buffer sleeve L. The hinge rod has a square structure and a hinge ring at its end. The top outer side of the main support J has a yoke-shaped hinge seat. The hinge ring is hinged to the hinge seat by a pin. The bottom of the hinge rod is connected to the top of the energy-absorbing unit group, and the bottom of the energy-absorbing unit group is connected to the foot pad T. Buffer sleeves L are connected between the upper outer wall of the main support J and the lower inner wall of the hinge rod, and between the outer corner of the side platform B and the middle of the inner wall of the energy-absorbing unit group.

[0026] Furthermore, such as Figure 9 As shown, the energy-absorbing unit group includes several energy-absorbing units, a cable O, and a pyrotechnic device P. The energy-absorbing units are folded and fixed by the cable O. The cable O is equipped with a pyrotechnic device P for cutting and unlocking. The energy-absorbing unit group folds several energy-absorbing units by the cable O, so that it occupies less space before airdrop, making it easier to transport and place in the helicopter cabin. After airdrop, the cable O is cut by the pyrotechnic device P. The pyrotechnic device P can be an existing device such as a pyrotechnic cutter, which can perform partial cutting of the cable O.

[0027] Furthermore, such as Figure 10 and Figure 15 As shown, the energy-absorbing unit includes a one-dimensional deployable mechanism 10 and a buffer airbag 11. The one-dimensional deployable mechanism 10 includes an upper platform 101, a lower platform 103, a sodium azide inflator 104, a platform exhaust port 105, an upper branch rod 106, and a lower branch rod 107. The upper platform 101 and the lower platform 103 are parallel to each other. The top end of the upper branch rod 106 is hinged to a rotating joint at the bottom corner of the upper platform 101, and the bottom end of the upper branch rod 106 is hinged to a rotating joint at the middle of the top end of the lower branch rod 107. The bottom end is hinged to the rotating joint at the top corner of the lower platform 103. The top center of the upper platform 101 is provided with a sodium azide inflator 104 for inflating the buffer airbag 11. The buffer airbag 11 is located between the middle of the upper platform 101 and the lower platform 103. The middle of the outer wall of the upper platform 101 and the lower platform 103 is provided with the platform exhaust port 105. The center of the hole of the upper branch rod 106 and the lower branch rod 107 is offset. The rotating joint axes of the top and bottom ends of the adjacent upper branch rod 106 and lower branch rod 107 are perpendicular.

[0028] Furthermore, such as Figure 6 , Figure 7 , Figure 8 and Figure 16As shown, the buffer sleeve L includes a cylinder 12, a tie rod 13, and an aluminum honeycomb 14. The cylinder 12 is a hollow cylindrical structure with one open end. The aluminum honeycomb 14 is arranged in a ring structure inside the cylinder 12. The aluminum honeycomb 14 has an axial through hole for the tie rod 13. The inner end of the tie rod 13 passes through the through hole of the aluminum honeycomb 14 and contacts the middle of the inner wall of the cylinder 12. The closed end of the cylinder 12 is hinged to the upper part of the outer wall of the main support J or the outer corner of the side platform B. The free end of the tie rod 13 is hinged to the lower part of the inner wall of the hinged rod or to the middle of the inner wall of the energy absorption unit group through the elastic rope Q. When the airdrop platform leaves the cabin and begins landing buffering, the pyrotechnic P cuts the cable O, the buffer legs are released, and according to the signal, the sodium azide inflator produces a chemical reaction, generating a large amount of gas. The buffer airbag 11 is filled with gas, and the buffer legs D quickly deploy. The buffer sleeve L above the outer wall of the main support J is stretched by the buffer legs D, and the tie rod 13 generates tensile force. Subsequently, the aluminum honeycomb 14 inside the cylinder 12 is squeezed to absorb the buffer force, ensuring that the angle change of the buffer legs D is always within a controllable range that does not affect the landing buffer. The elastic rope Q at the outer end of the buffer sleeve L connected to the outer corner of the side platform B is stored in a bundle when it is retracted. At this time, it is stretched due to the movement of the buffer legs D. When the elastic rope Q is stretched to a predetermined length, the buffer sleeve is stretched by the elastic rope Q. Subsequently, the tie rod 13 generates tensile force, and the built-in aluminum honeycomb 14 is squeezed to generate resistance, which hinders the movement of the tie rod 13. In this way, the buffer sleeve L and the elastic rope Q together hinder the slippage of the buffer legs D, further ensuring the stability of the platform landing buffer process.

[0029] Furthermore, such as Figure 17As shown, the combined airbag F includes a main airbag 15, an auxiliary airbag 16, an inner airbag 17, an air inlet 18, and an exhaust port 19. The main airbag 15 has a hollow square structure with an air inlet 18 in the middle of its bottom. The outer wall of the main airbag 15 is a sloping surface that slopes downwards and outwards from the bottom. The auxiliary airbag 16 is connected to the outer wall of the main airbag 15. The connection surface between the auxiliary airbag 16 and the main airbag 15, as well as the outer wall of the auxiliary airbag 16, are provided with several exhaust ports 19. The inner airbag 17, which has a hollow cylindrical structure, is located between the middle of the front inner wall and the rear inner wall of the main airbag 15. The air inlet 18 is connected to an inflation device located at the bottom of the main platform A. The airdrop platform lands... During the cushioning process, the combined airbag F explodes through the sodium azide inflator at the bottom of the main platform A, generating a large amount of gas that rapidly inflates the main airbag 15 through the air inlet 18. Upon contact with the ground, it is subjected to dual compression from the ground and the airdrop platform. The gas inside the airbag is squeezed from the main airbag 15 to the auxiliary airbag 16, which is then inflated. As the compression pressure increases, excess gas is discharged through the exhaust port 19, achieving the cushioning and absorption of the landing impact. Compared to a single airbag, this airbag has an additional inner airbag 17. The inner airbag 17 does not exhaust gas to prevent the platform from hitting the ground upon landing, thus achieving a better cushioning effect. The inflation device connected to the air inlet 18 is not shown; it is an existing sodium azide inflator or similar equipment.

[0030] Furthermore, such as Figure 8 As shown, the top outer wall of the main support J is connected to several reinforcing supports K. The bottom of the reinforcing supports K is fixed to the side platform B. The reinforcing supports K are set to ensure structural stability and improve the connection strength of the main support J.

[0031] Furthermore, the bottom front and rear ends of side platform B are connected to the top of side platform caster rods, and the bottom ends of the side platform caster rods are connected to side platform casters 30; the bottom front and rear sides of the main platform A are connected to the top of the main platform caster rods, and the bottom ends of the main platform caster rods are connected to main platform casters 31. The main platform casters 31 and side platform casters 30 are at the same height. By setting the main platform casters 31 and side platform casters 30, it is convenient to push the platform loaded with goods into the helicopter cabin during the preparation stage, and it can also be pushed to the unloading location after airdrop landing. Preferably, as follows... Figure 3 As shown, the lowest point of the caster is lower than the lowest point of the cushioned straight leg C, the cushioned angled leg D, and the combined airbag F in their retracted state, and as... Figure 5 As shown, the lowest point of the caster is higher than the lowest point of the shock-absorbing straight leg C, the shock-absorbing angled leg D, and the combined airbag F in their deployed states.

[0032] Work process: Preparation and Airdrop: The main platform A and side platform B are connected in a stable "Z" shape within the helicopter cabin via quick-release locking mechanism S, support column latch R, and angled column latch I. The buffer straight leg C, buffer angled leg D, and combined airbag F are all in the retracted position. The platform is then pushed out of the helicopter cabin.

[0033] Landing buffer: After airdrop: The pyrotechnic device P on the straight buffer leg C and the angled buffer leg D cuts the cable, and at the same time, the sodium azide inflator 104 is ignited, inflating the buffer airbag 11 and venting the air through the throttle port 105, causing the straight buffer leg C and the angled buffer leg D to deploy. Simultaneously, the sodium azide inflator on the main platform A inflates the combined airbag F through the air inlet 18, causing the combined airbag F to deploy.

[0034] Secondary buffering: The main body of the platform continues to fall, and the combined airbag F contacts the ground. The inner airbag 17 first buffers the central load, the main airbag 15 bears the main weight and guides the airflow through the bottom slope, and the auxiliary airbag 16 and its exhaust port 19 exhaust the air in a directional manner, generating damping and adjusting the platform's attitude to prevent rebound and sideslip.

[0035] Stable landing: Through multi-stage buffering, impact energy is fully absorbed and dissipated. The wide "Z"-shaped support surface and slanted leg design ensure a smooth landing of the platform, effectively protecting the cargo. Furthermore, the quick-release locking mechanism S, support column tower buckle R, and slanted column tower buckle I allow for the disassembly of the main platform A and the side platform B, facilitating rapid unloading after landing.

[0036] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention's specification and drawings, or any direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A parachuteless airdrop platform for transport helicopters, characterized in that: It includes the main platform (A), side platform (B), cushioned straight leg (C), and cushioned diagonal leg (D). The main platform (A) has a square structure, and its two ends are hinged to the inner ends of the side platforms (B) on both sides through several support columns (E). The three are connected to form a "Z" shaped structure. The lower part of the outer wall of the middle support column (E) is connected to the bottom of the outer end of the side platform (B) by a diagonal beam (G). The upper part of the inner wall of the front and rear support columns (E) is hinged to the top sides of the main platform (A) through diagonal bracing columns (H). The side platform (B) is provided with the buffer straight leg (C) on the bottom front and rear sides, and the buffer straight leg (C) can extend downward in the vertical direction; The side platform (B) is provided with a main support (J) on the front and rear sides of the top. The top of the buffer inclined leg (D) is hinged to the top of the main support (J). The bottom of the buffer inclined leg (D) can extend in a downward direction. The bottom of the main platform (A) is provided with several combined airbags (F).

2. The parachuteless airdrop platform for transport helicopters according to claim 1, characterized in that: The main platform (A) has four equally spaced support column buckles (R) at both ends for hinged connection to the bottom of the support column (E). Each support column buckle (R) includes a base block (20), an ear plate (21), a tower plate pin (22), and a support column tower plate (23). The inner ends of the two square-shaped base blocks (20) are connected to the lower end of the main platform (A). The top center of the base block (20) has a lower semi-circular groove for placing the bottom support column pivot (24) of the support column (E). Two ear plates (21) are provided above the end face of the platform (A). The two ends of the tower plate pin (22) pass through the ear plates (21) on both sides and are fixedly connected to the inner end of the support column tower plate (23). The support column tower plate (23) is a square structure with a semi-circular rear end. The bottom center is provided with an upper semi-circular groove. The upper semi-circular groove and the lower semi-circular groove form a shaft hole for the rotation of the support column shaft (24). The bottom block (20) and the end of the support column tower plate (23) are connected by a quick-release locking mechanism (S).

3. The parachuteless airdrop platform for transport helicopters according to claim 2, characterized in that: The quick-release locking mechanism (S) includes a retaining groove (1), a retaining hook (2), a limit nut (3), a rotating body (4), a base (25), a rotating shaft (26) and a rotating rod (27). The base (25) has a "convex" structure and is fixed to the end of the base block (20). The rotating body (4) has a yoke-shaped structure, and its top end is hinged to the outer end of the base (25) through the rotating shaft (26). A rotating hole for the rotating rod (27) to pass through is provided below the outer wall of the rotating body (4). At both ends of the rotating rod (27), retaining hook holes for both ends of the "U"-shaped retaining hook (2) to pass through are provided along the radial direction. External threads for connecting the limit nut (3) are provided on the outer wall of the end of the retaining hook (2). Limit nuts (3) are connected to the outer walls of the retaining hooks (2) on both sides of the rotating rod (27). The retaining groove (1) is provided at the outer end of the support column tower plate (23). The retaining groove (1) has a hook-shaped structure, and a groove for mating and clamping with the top end of the retaining hook (2) is provided in the middle of its top.

4. The parachuteless airdrop platform for transport helicopters according to claim 3, characterized in that: The bottom end of the diagonal strut (H) is hinged to both sides of the top of the main platform (A) through a diagonal strut tower buckle (I). The diagonal strut tower buckle (I) includes an upper tower buckle (5), a lower tower buckle (6), a tower buckle pin (7), a tower buckle plate (8), a tower buckle plate pin lock (9), a hinge (28), and a lock plate (29). One end of the hinge (28) is connected to the top of the main platform (A), and the other end of the hinge (28) is connected to the inner end of the upper tower buckle (5). The upper tower buckle (5) has a "U"-shaped structure, and its outer end sides are hinged to the inner ends of the tower buckle plates (8) through the tower buckle pins (7). A tower buckle upper semi-circular groove is provided in the middle of the bottom of the upper tower buckle (5). The lower tower buckle (6) has a "U"-shaped structure and is fixed to the main platform (A) outside the hinge (28). A tower buckle lower semi-circular groove is provided in the middle of the top of the lower tower buckle (6). The tower buckle upper semi-circular groove and the tower buckle lower semi-circular groove form a diagonal strut rotating shaft hole for the rotation of the diagonal strut rotating shaft at the bottom of the diagonal strut (H). A lock plate (29) is provided at the outer end of the lower tower buckle (6), and a lock hole for connecting the "U"-shaped tower buckle plate pin lock (9) is provided in the middle of the lock plate (29). The tower buckle plate (8) has an "L"-shaped structure, and a lock plate hole for the lock plate (29) to pass through is provided below the front end.

5. A transport helicopter parachute-free airdrop platform according to claim 4, characterized in that: The buffer straight leg (C) includes an energy-absorbing unit group, a connecting plate (M), and a foot pad (T). The connecting plate (M) has a square structure, and its top is connected to the front and rear sides of the bottom of the side platform (B). The top of the energy-absorbing unit group is connected to the bottom of the connecting plate (M), and the bottom of the energy-absorbing unit group is connected to the foot pad (T). The buffer inclined leg (D) includes a hinge rod, an energy-absorbing unit group, a foot pad (T), and a buffer sleeve (L). The hinge rod has a square structure, and its end is provided with a hinge ring. The top outer side of the main support (J) is provided with a yoke-shaped hinge seat. The hinge ring is hinged to the hinge seat by a pin. The bottom end of the hinge rod is connected to the top of the energy-absorbing unit group, and the bottom end of the energy-absorbing unit group is connected to the foot pad (T). Buffer sleeves (L) are respectively connected between the upper outer wall of the main support (J) and the lower inner wall of the hinge rod, and between the outer corner of the side platform (B) and the middle of the inner wall of the energy-absorbing unit group.

6. A parachuteless airdrop platform for transport helicopters according to claim 5, characterized in that: The energy-absorbing unit group includes several energy-absorbing units, a cable (O) and a pyrotechnic device (P). Several of the energy-absorbing units are folded and fixed by the cable (O). The cable (O) is provided with a pyrotechnic device (P) for cutting and unlocking. The energy-absorbing unit includes a one-dimensional deployable mechanism (10) and a buffer airbag (11).

7. A parachuteless airdrop platform for transport helicopters according to claim 6, characterized in that: The one-dimensional deployable mechanism (10) includes an upper platform (101), a lower platform (103), a sodium azide inflator (104), a platform exhaust port (105), an upper branch rod (106), and a lower branch rod (107). The upper platform (101) and the lower platform (103) are parallel to each other. The top end of the upper branch rod (106) is hinged to the bottom corner of the upper platform (101) via a rotating joint. The bottom end of the upper branch rod (106) is hinged to the top end of the lower branch rod (107) via a middle rotating joint. The bottom end of the lower branch rod (107) is connected to the lower platform (103). The rotating joint at the top corner is hinged. The top middle of the upper platform (101) is provided with a sodium azide inflator (104) for inflating the buffer airbag (11). The buffer airbag (11) is located between the middle of the upper platform (101) and the lower platform (103). The middle of the outer wall of the upper platform (101) and the lower platform (103) is provided with the platform exhaust port (105). The center of the hole of the upper branch rod (106) and the lower branch rod (107) is eccentrically offset. The rotating joint axis of the top and bottom of the adjacent upper branch rod (106) and lower branch rod (107) is perpendicular.

8. A transport helicopter parachute-free airdrop platform according to claim 7, characterized in that: The buffer sleeve (L) includes a cylinder (12), a pull rod (13), and an aluminum honeycomb (14). The cylinder (12) is a hollow cylindrical structure with one end open. The aluminum honeycomb (14) is arranged in an annular structure inside the cylinder (12). The aluminum honeycomb (14) has a through hole for the pull rod (13) in the axial direction. The inner end of the pull rod (13) passes through the through hole of the aluminum honeycomb (14) and contacts the middle of the inner wall of the cylinder (12). The closed end of the cylinder (12) is hinged to the upper part of the outer wall of the main support (J) or the outer corner of the side platform (B). The free end of the pull rod (13) is hinged to the lower part of the inner wall of the hinge rod or to the middle of the inner wall of the energy absorption unit group through an elastic rope (Q).

9. A parachuteless airdrop platform for transport helicopters according to claim 8, characterized in that: The combined airbag (F) includes a main airbag (15), an auxiliary airbag (16), an inner airbag (17), an air inlet (18), and an exhaust port (19). The main airbag (15) has a hollow square structure with an air inlet (18) in the middle of its bottom. The outer wall of the main airbag (15) is a sloping surface that slopes downward from the bottom. The outer wall of the main airbag (15) is connected to the auxiliary airbag (16). The connection surface between the auxiliary airbag (16) and the main airbag (15) and the outer wall of the auxiliary airbag (16) are provided with several exhaust ports (19). The inner airbag (17) has a hollow cylindrical structure between the middle of the front inner wall and the rear inner wall of the main airbag (15). The air inlet (18) is connected to an inflation device located at the bottom of the main platform (A).

10. A parachuteless airdrop platform for transport helicopters according to claim 9, characterized in that: The top outer wall of the main support (J) is connected to several reinforcing supports (K), and the bottom of the reinforcing supports (K) is fixed to the side platform (B); the bottom front end and the bottom rear end of the side platform (B) are respectively connected to the top end of the side platform caster rod, and the bottom end of the side platform caster rod is connected to the side platform caster (30); the bottom front end sides and the bottom rear end sides of the main platform (A) are connected to the top end of the main platform caster rod, and the bottom end of the main platform caster rod is connected to the main platform caster (31), and the height of the main platform caster (31) is equal to that of the side platform caster (30).

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