A collision-proof airdrop box

Abstract

The present invention relates to the technical field of packaging boxes, and specifically discloses an anti-collision airdrop box, comprising: a box body and a box cover. The bottom of the box body is also provided with a fixed frame, a connecting rod assembly and a telescopic assembly. The box body and the box cover are buckled together by a lock to ensure the sealing effect between the box body and the box cover during the airdrop process. The fixed frame is installed at the bottom of the box body, and the fixed frame is in a mouth shape. The connecting rod assembly comprises a vertical rod, a rotating rod and a sliding rod. The vertical rod is slidably arranged on the fixed frame, and the rotating rod and the sliding rod are hinged on the vertical rod. The other end of the rotating rod is hinged on the fixed frame, and the other end of the sliding rod is hinged on the telescopic assembly. The anti-collision airdrop box of the present invention effectively buffers the impact force when the airdrop box falls to the ground, avoids local force concentration on the box body, reduces damage to the box body and internal materials due to severe impact, adapts to different landing environments, and improves the safety of airdrop.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging boxes, and in particular to an anti-collision airdrop box. Background Art

[0002] Airdrop boxes are key vehicles for logistics, emergency rescue, and special delivery. Their impact protection at the moment of contact directly determines the safety of supplies. Existing technologies generally use a rigid shell combined with built-in cushioning materials. These materials typically include foam plastics, honeycomb structures, or air bags. However, there is a significant conflict between the cushioning body and the load. To achieve greater protection, a thick cushioning layer is often required, which encroaches on the effective volume, increases transportation costs, and has poor dynamic adaptability. The landing posture and landing surface rigidity of the box are complex and varied, such as on hard ground or snow. Under different terrain conditions, the box is subjected to different force points upon landing. If the force points are concentrated, local damage to the box is likely to occur. This limits the repeatability and reliability of the materials within the box. Cushioning materials, such as foam, are easily permanently damaged after impact, reducing reliability.

[0003] Chinese patent application CN116424701A discloses a packaging box for airdropped plasma bags. The box comprises a box body in the shape of a regular cube, a lid, and capsules on several sides of the box body and the lid. The capsules are filled with gel, which is filled with a pasty colloid. Puncture anchors are provided on several sides of the box body and the lid, aligned with the center of the capsule. The box body also includes a plasma bag placement mechanism. Shock-absorbing rods are detachably fixed at each of the eight vertices of the box body. Three bending rods are fixed to the telescopic ends of the shock-absorbing rods. The ends of the three bending rods are tapered and face the three capsules, respectively. The present invention allows the packaging box for airdropped plasma bags to be quickly stabilized, avoiding any impact on the stability of the plasma inside.

[0004] In the related prior art, different types of packaging boxes are required for different materials. When a longer rectangular box is airdropped, the parachute will be hung on the upper part of the box, so that the box is close to horizontal when it contacts the ground. When the rectangular box contacts the ground, some parts will contact the ground first, causing the force points of the box to be concentrated. The concentrated force on the box causes local damage, making the entire packaging box unusable. At the same time, if the force is too great, it is easy to cause the packaging box to bend, causing damage to the materials inside the box. Summary of the Invention

[0005] The present invention provides a collision-proof airdrop box, which aims to solve the problem in the related art that when a rectangular box contacts the ground, some parts of the box will contact the ground first, resulting in concentrated force points on the box. The concentrated force on the box causes local damage, making the entire packaging box unusable. At the same time, when the force is too great, the packaging box is easily bent, causing damage to the materials inside the box.

[0006] A collision-proof airdrop box comprises: a box body and a box cover; a fixed frame, a connecting rod assembly and a telescopic assembly are arranged at the bottom of the box body; the fixed frame is arranged in a U-shaped manner at the bottom of the box body; two groups of connecting rod assemblies are symmetrically arranged on the lower side of the fixed frame; the connecting rod assembly comprises a vertical rod, a rotating rod and a sliding rod; the upper end of the vertical rod is arranged on the fixed frame for sliding left and right; the rotating rod and the sliding rod are hinged on the left and right sides of the vertical rod; the other end of the rotating rod is hinged on the fixed frame; the other end of the sliding rod is hinged on the telescopic assembly; the telescopic assembly is horizontally arranged at the lower end of the fixed frame; and the fixed end of the telescopic assembly is arranged at an end of the fixed frame away from the rotating rod;

[0007] When the vehicle falls to the ground, the lower end of the vertical rod rests on the ground and the vertical rod contracts. The vertical rods on the left and right sides move away from each other, and the sliding rod contracts the telescopic assembly. When the telescopic assembly contracts to the shortest state, there is a gap between the rotating rod and the sliding rod and the fixed frame.

[0008] The effect is that by setting up a connecting rod assembly and a telescopic assembly, when landing, the vertical rod is subjected to force to drive the connecting rod assembly to move, causing the telescopic assembly to contract, and converting the vertical impact load into a horizontal telescopic movement, thereby achieving the dispersion and absorption of impact energy. The gap between the rotating rod and the sliding rod and the fixed frame reserves space for the movement of components to avoid rigid collision, while ensuring that the force of the impact is evenly transmitted to the box from the contact point with the fixed frame, effectively buffering the impact force when the airdrop lands, avoiding local force concentration on the box, reducing the damage to the box and internal materials caused by severe impact, adapting to different landing environments, and improving the safety of airdrops.

[0009] Preferably, when the telescopic assembly is retracted to its shortest state, the lower end of the vertical rod protrudes from the lower end surface of the box, and the lower end of the vertical rod is in an inverted cone shape. The effect is that the inverted cone design allows the vertical rod to contact the ground first, guiding the impact force to be transmitted along the axial direction of the rod body, and the protruding structure enhances the grip, preventing the box from slipping sideways, accurately guiding the impact transmission path, avoiding the box from tipping over, and improving landing stability, especially reducing the risk of the box tipping over on soft ground.

[0010] Preferably, the vertical rod can be extended and retracted in the up and down directions, the lower end of the vertical rod is hinged to the rotating rod and the sliding rod respectively, the upper end of the vertical rod slides and abuts against the fixed frame, and the upper end surface of the vertical rod is provided with multiple rollers along the left and right directions. The effect is: by providing the rollers, the resistance of the vertical rod to sliding left and right is reduced, the impact absorption capacity is enhanced, and the extension and retraction of the vertical rod further dissipates energy, thereby ensuring the smoothness of the linkage and avoiding the jamming of components and the failure of the buffer.

[0011] Preferably, the telescopic assembly includes a fixed arm and a sliding arm, the sliding rod is hinged on the sliding arm, a plurality of rollers are provided on the end surface of the sliding arm in contact with the fixed frame, the sliding arm is telescopic left and right along the fixed arm, and an elastic part 1 is provided between the fixed arm and the sliding arm. When the telescopic assembly contracts, the elastic part 1 contracts under force and its elastic potential energy increases.

[0012] Preferably, two rotating rods are provided in parallel with each other, and the two ends of the two rotating rods are hinged to the vertical rod and the fixed frame respectively; two sliding rods are provided in parallel with each other, and the two ends of the two sliding rods are hinged to the vertical rod and the sliding arm respectively, and when the vertical rod is extended and retracted, the rotating rod and the sliding rod restrict the vertical rod and the fixed frame to remain perpendicular.

[0013] Preferably, a second elastic member is provided in the vertical rod, and when the vertical rod contracts in the vertical direction, the elastic potential energy of the second elastic member increases.

[0014] Preferably, multiple connecting rod assemblies and telescopic assemblies are arranged on the fixed frame along the front-to-back direction. The effect is that by arranging multiple groups of connecting rod assemblies and telescopic assemblies, the entire bottom surface of boxes of different models can be covered, and effective support can be provided for boxes of different widths, ensuring that boxes of different models can be effectively buffered when touching the ground, thereby solving the problem of easy bending of rectangular airdrop boxes.

[0015] Preferably, limit columns are provided on the front and rear sides of the vertical rod, and a connecting rod is provided between the two adjacent vertical rods. The two ends of the connecting rod are respectively connected to the limit columns of the vertical rods at both ends. The effect is that the adjacent vertical rods can move synchronously by providing the connecting rod, thereby improving the stability of the overall structure.

[0016] Preferably, a plurality of reinforcing rods are provided in the fixing frame along the front-to-back direction.

[0017] Preferably, the box cover is provided with a plurality of limiting holes corresponding to the vertical rods.

[0018] By adopting the above technical solution, the beneficial effects of the present invention are:

[0019] By setting up a connecting rod assembly and a telescopic assembly, when landing, the vertical rod is subjected to force to drive the connecting rod assembly to move, causing the telescopic assembly to contract, and converting the vertical impact load into a horizontal telescopic movement, thereby achieving the dispersion and absorption of impact energy. Setting up multiple sets of connecting rod assemblies and telescopic assemblies can cover the entire bottom surface of boxes of different models, provide effective support for boxes of different widths, ensure that boxes of different models can be effectively buffered when touching the ground, and solve the problem of easy bending of rectangular airdrop boxes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the airdrop box of the present invention.

[0021] Figure 2 This is a schematic diagram of the box cover structure of the airdrop box of the present invention.

[0022] Figure 3 Schematic diagram of the structure of the connecting rod assembly of the present invention.

[0023] Figure 4 It is a structural schematic diagram of the telescopic assembly of the present invention.

[0024] Figure 5 It is a structural schematic diagram of the vertical rod of the present invention.

[0025] Figure 6 It is a structural schematic diagram of the fixed arm and the sliding arm of the present invention.

[0026] Figure 7 It is a structural schematic diagram of the roller of the present invention.

[0027] Figure 8 This is a schematic diagram of the structure inside the vertical rod of the present invention.

[0028] Figure 9 It is a structural schematic diagram of the connecting rod and the sliding rod of the present invention.

[0029] Reference numerals:

[0030] 11. Box body; 12. Box cover; 13. Fixed frame; 14. Reinforcement rod; 15. Limit hole; 2. Connecting rod assembly; 21. Vertical rod; 211. Elastic part 2; 212. Limiting column; 213. Connecting rod; 22. Rotating rod; 23. Sliding rod; 24. Roller; 3. Telescopic assembly; 31. Fixed arm; 32. Sliding arm; 33. Elastic part 1. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0032] like Figures 1 to 9As shown, an anti-collision airdrop box includes a box body 11 and a box cover 12. The bottom of the box body 11 is also provided with a fixed frame 13, a connecting rod assembly 2 and a telescopic assembly 3. The box body 11 and the box cover 12 are buckled together by a lock to ensure the sealing effect between the box body 11 and the box cover 12 during the airdrop process. The fixed frame 13 is installed at the bottom of the box body 11. The fixed frame 13 is in a square shape. The connecting rod assembly 2 includes a vertical rod 21, a rotating rod 22 and a sliding rod 23. The vertical rod 21 is slidably set on the fixed frame 13. The rotating rod 22 and the sliding rod The movable rod 23 is hinged on the vertical rod 21, the other end of the rotating rod 22 is hinged on the fixed frame 13, and the other end of the sliding rod 23 is hinged on the telescopic assembly 3. When the vehicle falls to the ground, the vertical rod 21 is subjected to force to move the rotating rod 22 and the sliding rod 23, and the sliding rod 23 squeezes the telescopic assembly 3 to shrink the telescopic assembly 3. When the telescopic assembly 3 shrinks, the telescopic assembly 3 has a shock-absorbing effect on the box body 11, and the impact force is transmitted to the fixed frame 13 through the rotating rod 22 and the sliding rod 23, and the fixed frame 13 is evenly transmitted to the bottom of the box body 11.

[0033] The fixed frame 13 at the bottom of the box 11 is fixedly installed at the bottom of the box 11 in an embedded manner. The fixed frame 13 can improve the rigidity of the box 11 and reduce the uneven force and deformation of the box 11 when the bottom of the box 11 is subjected to force. The vertical rod 21, the rotating rod 22 and the sliding rod 23 cooperate with the telescopic component 3. When the box 11 falls to the ground, the vertical rod 21 transfers the force it receives to the fixed frame 13 and the telescopic component 3 through the rotating rod 22 and the sliding rod 23. During the process of contraction under force, the telescopic component 3 has a shock-absorbing effect on the box 11. At the same time, the sliding rod 23 and the rotating rod 22 evenly transmit the force to the two ends and the middle of the fixed frame 13, thereby improving the uniformity of the force on the box 11 and preventing the force concentration on the box 11 from causing damage to the force points.

[0034] like Figures 3 to 9 As shown, the connecting rod assembly 2 includes a vertical rod 21, a rotating rod 22 and a sliding rod 23. A hinge seat is provided in the middle position of the fixed frame 13. One end of the rotating rod 22 is hinged to the hinge seat of the fixed frame 13. The rotating rod 22 rotates around the hinge seat. The other end of the rotating rod 22 is hinged to the vertical rod 21. The sliding rod 23 is symmetrically provided on the other side of the vertical rod 21. The sliding rod 23 and the rotating rod 22 are symmetrically provided with respect to the vertical rod 21. When the vertical rod 21 is against the ground box 11 and continues to descend, the angle between the rotating rod 22 and the sliding rod 23 becomes larger.

[0035] The setting of the vertical rod 21 can change the force point of the box body 11 when it falls, so that the vertical rod 21 contacts the ground first when the box body 11 falls, and then the box body 11 continues to fall, driving the rotating rod 22 and the sliding rod 23 on both sides of the vertical rod 21 to move, thereby preventing the box body 11 from falling directly to the ground due to uneven ground, and preventing the position where the box body 11 contacts the ground from being subjected to excessive force, thereby preventing the box body 11 from being damaged.

[0036] like Figures 5 to 8 As shown, the vertical rod 21 is telescopically arranged, and the upper end of the vertical rod 21 abuts against the bottom surface of the fixed frame 13. A plurality of rollers 24 are provided at the upper end of the vertical rod 21. The rollers 24 are arranged between the vertical rod 21 and the fixed frame 13 along the left and right directions. By opening a rotating groove at the upper end of the vertical rod 21, a rotating shaft is embedded in the rotating groove to form a roller 24 structure, so that the vertical rod 21 can achieve low-friction sliding on the fixed frame 13. Side plates are provided on the front and rear sides of the vertical rod 21. The distance between the side plates is the same as the side width of the fixed frame 13. The side plates limit the vertical rod 21 from shifting forward and backward when it moves left and right.

[0037] The lower end of the vertical rod 21 is hinged to the rotating rod 22 and the sliding rod 23 respectively. A hinge seat is provided on both symmetrical sides of the vertical rod 21. The rotating rod 22 and the sliding rod 23 are symmetrically hinged on both sides of the vertical rod 21. When the lower end of the vertical rod 21 is extended and retracted along the upper end of the vertical rod 21, the rotating rod 22 and the sliding rod 23 symmetrically hinged on both sides of the lower end of the vertical rod 21 synchronously approach or move away from the vertical rod 21.

[0038] The upper end of the vertical rod 21 and the fixed frame 13 are arranged in an abutting relationship with a plurality of rollers 24 located in the same plane, so that the vertical rod 21 and the fixed frame 13 remain vertical during the movement.

[0039] like Figures 2 to 9 As shown, the telescopic assembly 3 is arranged at the lower end of the fixed frame 13, and the telescopic assembly 3 is arranged on the end of the fixed frame 13 away from the hinge seat. The telescopic assembly 3 includes a fixed arm 31 and a sliding arm 32. The fixed arm 31 is fixed on the fixed frame 13, and the fixed arm 31 is fixed to the fixed frame 13 by bolts. The bolt installation method allows the entire telescopic assembly 3 to be quickly disassembled for maintenance. The sliding arm 32 is slidably installed in the fixed arm 31, and the sliding arm 32 slides left and right along the fixed arm 31. The sliding rod 23 is hinged to the end of the sliding arm 32 away from the fixed arm 31.

[0040] The sliding arm 32 is connected to the fixed arm 31 via a slide rail structure, ensuring smooth sliding. The end of the sliding arm 32 is designed with an anti-tripping latch to effectively prevent accidental detachment during use. The fixed arm 31 is equipped with a wear-resistant layer to reduce wear and tear from long-term use, extending the life of the device. A limiter is also installed at the connection between the sliding arm 32 and the fixed arm 31, allowing the sliding stroke of the sliding arm 32 to be adjusted according to actual needs.

[0041] The elastic member 33 is placed between the fixed arm 31 and the sliding arm 32. The elastic member 33 is preferably a spring. The setting of the spring can provide continuous and uniform pressure to ensure that the sliding arm 32 remains stable during movement, while absorbing and alleviating the impact force of the box body 11 during the landing process, thereby extending the service life of the airdrop box.

[0042] The cam 32 is provided with a plurality of rollers 24 on the end surface where the sliding arm 32 contacts the fixed frame 13, and the sliding arm 32 is extended and retracted left and right along the fixed arm 31. The rollers 24 are provided on the sliding arm 32 along the left and right directions. A rotating groove can be provided at the upper end of the vertical rod 21, and a rotating shaft is embedded in the rotating groove to form a roller 24 structure, so that the sliding arm 32 can achieve low-friction sliding on the fixed frame 13. A plurality of rollers 24 located in the same plane are provided between the sliding arm 32 and the fixed frame 13 to reduce the sliding resistance between the sliding arm 32 and the fixed frame 13. In the process of the sliding arm 32 sliding along the fixed arm 31, the elastic member 33 contracts to absorb the impact force between the box body 11 and the ground. At the same time, the connection relationship between the plurality of rollers 24 between the sliding arm 32 and the fixed frame 13 transmits the impact force to the fixed frame 13, so that the contact position between the sliding arm 32 and the fixed frame 13 is constantly changing, so as to reduce the problem of damage caused by excessive local force on the fixed frame 13.

[0043] like Figures 5 to 9 As shown, two rotating rods 22 are provided in parallel with each other, and the two ends of the two rotating rods 22 are respectively hinged on the hinge seat of the fixed frame 13 and the vertical rod 21, and the hinge axes of the two rotating rods 22 located at the hinge seat of the fixed frame 13 are located on the same vertical plane, and two sliding rods 23 are also provided in parallel with each other, and the two ends of the two sliding rods 23 are respectively hinged on the sliding arm 32 and the vertical rod 21, and the hinge axes of the two sliding rods 23 on the sliding arm 32 are located on the same vertical plane, the lengths of the two rotating rods 22 are the same, and the lengths of the two sliding rods 23 are the same, which further limits the vertical rod 21 to always maintain a perpendicular relationship with the fixed frame 13, further limits and reduces the problem of the vertical rod 21 being tilted by force during the movement process, and prevents the vertical rod 21 from getting stuck when moving relative to the fixed frame 13.

[0044] The parallel arrangement of the two rotating rods 22 and the sliding rod 23 ensures greater stability and reliability during operation of the entire device. Since the vertical rod 21 always maintains a perpendicular relationship with the fixed frame 13, this not only improves the load-bearing capacity of the device but also reduces wear and potential failures caused by tilting.

[0045] The rotating rod 22 and the sliding rod 23 are preferably made of a high-strength alloy material to reduce the overall weight while ensuring structural strength. The surface of the rotating rod 22 and the sliding rod 23 is coated with an anti-corrosion layer, which makes them have excellent corrosion resistance and wear resistance, and can adapt to airdrop missions in various harsh environments. In addition, bearings are set at the hinged parts of the rotating rod 22 and the sliding rod 23 to ensure that friction is minimized during movement, thereby improving response speed and accuracy. This design not only extends the service life of the components, but also enhances the adaptability of the entire airdrop box in complex terrain, ensuring that the supplies can be delivered safely and intact to the destination.

[0046] like Figures 3 to 8 As shown, the lower end of the vertical rod 21 is in an inverted cone shape. When the telescopic assembly 3 is retracted to the shortest state, the lower end of the vertical rod 21 protrudes from the lower end surface of the box 11. Under the influence of gravity and impact force, the inverted cone part of the vertical rod 21 is inserted into the ground, so that the box 11 remains stable after landing, reducing the overturning of the box 11. The inverted cone design can also buffer the impact force to a certain extent, further protecting the box 11 and the internal materials.

[0047] Furthermore, the second elastic member 211 is provided in the vertical rod 21. When the vertical rod 21 contracts in the vertical direction, the second elastic member 211 also contracts, and its elastic potential energy increases. This design can effectively absorb and disperse the impact energy, reduce the direct impact on the box 11, and provide power for the reset of the vertical rod 21.

[0048] Furthermore, the inverted tapered design of vertical rods 21 not only provides stability when landing but also, to a certain extent, guides the natural balance of box 11 on uneven ground, reducing tilt and damage caused by uneven surfaces. The provision of elastic member 211 further enhances the system's cushioning capacity, effectively protecting delicate equipment or fragile items within box 11 from bumps and impacts during transportation. Overall, this structural design not only improves the impact resistance of box 11 but also enhances its adaptability and reliability in complex environments.

[0049] like Figures 2 to 8 As shown, multiple connecting rod assemblies 2 and telescopic assemblies 3 are arranged on the fixed frame 13 along the front and rear directions. Such a layout can adapt to different types of boxes 11. At the same time, multiple vertical rods 21 are arranged to improve the stability of the box 11 after it falls to the ground, ensuring that different types of boxes 11 can be effectively cushioned and protected when they fall to the ground.

[0050] The limiting columns 212 set on the front and rear sides of the vertical rod 21 and the connecting rod 213 set between the two adjacent vertical rods 21 are connected to the limiting columns 212 at both ends of the connecting rod 213. This structure limits the positions of multiple vertical rods 21 during movement, prevents them from excessive deviation, ensures the stable operation of the entire device, and also enhances the linkage between the vertical rods 21, so that the force can be distributed more evenly.

[0051] The connecting rod 213 and the limiting column 212 can be limited by a movable connection method fixed with bolts. When the geology is relatively soft snow or sand, the connecting rod 213 causes the multiple vertical rods 21 to shrink synchronously, maintaining the synchronous expansion and contraction of each telescopic rod during the landing of the box 11, making the box 11 more stable.

[0052] In areas with many rocks and other objects, the hardness of the ground varies greatly. Removing the connecting rod 213 allows different vertical rods 21 to be adaptively adjusted according to the conditions of their positions, so that different vertical rods 21 can adaptively reach different states, preventing local damage to a vertical rod 21 caused by excessive force due to linkage.

[0053] When the box 11 falls to the ground, the vertical rods 21 symmetrically arranged on both sides move away from each other. When the two vertical rods 21 move away from each other on the ground, the ground will restrict the movement of the vertical rods 21. The reverse force of the ground can be used to offset the movement of the two vertical rods 21 caused by the impact, so that the box 11 has a better buffering effect.

[0054] like Figures 3 to 9 As shown, the fixing frame 13 is provided with a plurality of reinforcing rods 14 along the front-to-back direction. The reinforcing rods 14 improve the strength and stability of the fixing frame 13 itself, help to better bear and transmit the impact force, and prevent the fixing frame 13 from being deformed when subjected to a large impact, thereby ensuring the structural integrity of the entire airdrop box.

[0055] At the same time, the rational layout of the reinforcing rods 14 can also disperse stress concentration points and reduce damage caused by excessive local stress. During the airdrop process, the fixed frame 13 is subjected to not only impact force, but also forces from various aspects such as air resistance and gravity. The provision of the reinforcing rods 14 enables the fixed frame 13 to distribute these forces more evenly, thereby extending the service life of the airdrop box. In addition, the material selection and design of the reinforcing rods 14 also take into account the requirements of lightweighting to reduce the overall weight and improve airdrop efficiency. In actual application, this design not only improves the safety of the airdrop box, but also reduces maintenance costs.

[0056] like Figures 2 to 7As shown, there are multiple limiting holes 15 corresponding to the vertical rods 21 provided on the box cover 12. When the airdrop boxes are stacked, the vertical rods 21 are placed in the corresponding limiting holes 15, and the hinged seats on the vertical rods 21 abut on the box cover 12. The inverted conical surface at the lower end of the vertical rods 21 does not contact the box cover 12 on the lower side. The weight of the box body 11 itself makes the two symmetrically arranged vertical rods 21 move away from each other, so that the left and right side walls of the two vertical rods 21 abut against the side walls of the limiting holes 15, preventing the airdrop box from shaking during movement. It is also beneficial to maintain the relative position between the box body 11 and the box cover 12 stable. During long-term use, the inner side walls of the limiting holes 15 abut against the side walls of the vertical rods 21 and will wear. A replaceable annular rubber ring is provided on the inner side wall of the limiting hole 15. After a period of use, the rubber ring can be quickly replaced after being worn. At the same time, the rubber ring can reduce the contact stress between the vertical rods 21 and the limiting hole 15, reducing damage caused by hard contact.

[0057] The installation of a replaceable annular rubber ring significantly enhances the durability and reliability of the airdrop box. The rubber ring effectively absorbs impact loads between the vertical rod 21 and the stopper hole 15, reducing stress concentration caused by hard contact and extending the overall service life. During transportation, the elastic deformation of the rubber cushions vibration and shaking, reducing noise. Furthermore, its replaceable design simplifies maintenance, allowing users to quickly replace worn parts without disassembling the main structure, significantly reducing maintenance costs and time.

[0058] Working principle: When airdropping materials, the materials are loaded into the box body 11 and sealed with the box cover 12. When airdropping, the materials are transported to the designated airdrop location by a carrier for airdropping.

[0059] During airdrop, the box body 11 gradually slows down and falls to the ground under the action of the parachute. When the box body 11 falls to the bottom of the designated position, the vertical rod 21 provided at the bottom of the box body 11 first touches the ground. The box body 11 continues to move downward under the action of gravity and inertia. The rotating rod 22 rotates around the hinge seat and the sliding rod 23 moves away from the hinge seat of the fixed frame 13 along the fixed frame 13. The sliding rod 23 pushes the sliding arm 32 to extend and retract into the fixed arm 31. The elastic member 33 between the sliding arm 32 and the fixed arm 31 is compressed, causing the elastic member 33 to accumulate force and contract, thereby providing a buffer for the box body 11.

[0060] The two vertical rods 21 symmetrically arranged on the left and right move away from each other when the box body 11 falls to the ground. When the two vertical rods 21 move relative to the ground, the reaction force of the ground limits the movement of the vertical rods 21, providing a buffer for the box body 11.

[0061] When the vertical rod 21 contracts, the elastic member 211 provided in the vertical rod 21 contracts, and the rotating rod 22, the sliding rod 23 and the vertical rod 21 divide the impact force between the box body 11 and the ground into multiple points and transmit them evenly to the fixed frame 13, and then the fixed frame 13 transmits it to the box body 11, so that the box body 11 is evenly stressed, preventing local damage caused by uneven stress on the box body 11. After the box body 11 falls to the ground, the inverted cone part of the vertical rod 21 pierces the ground, reducing problems such as rolling of the box body 11 after falling to the ground.

[0062] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A collision-proof airdrop box, comprising: The box body (11) and the box cover (12) are characterized in that a fixed frame (13), a connecting rod assembly (2) and a telescopic assembly (3) are provided at the bottom of the box body (11), the fixed frame (13) is arranged in a mouth-shaped manner at the bottom of the box body (11), and the connecting rod assembly (2) is symmetrically provided with two groups on the lower side of the fixed frame (13), and the connecting rod assembly (2) includes a vertical rod (21), a rotating rod (22) and a sliding rod (23), the upper end of the vertical rod (21) is arranged on the fixed frame (13) to slide left and right, the rotating rod (22) and the sliding rod (23) are hinged on the left and right sides of the vertical rod (21), and the rotating rod (22) and the sliding rod (23) are hinged on the left and right sides of the vertical rod (21). The other end of the (22) is hinged to the fixed frame (13), the other end of the sliding rod (23) is hinged to the telescopic assembly (3), the telescopic assembly (3) is horizontally arranged at the lower end of the fixed frame (13), the fixed end of the telescopic assembly (3) is arranged at one end of the fixed frame (13) away from the rotating rod (22), the vertical rod (21) can be telescoped in the up and down directions, the lower end of the vertical rod (21) is hinged to the rotating rod (22) and the sliding rod (23) respectively, the upper end of the vertical rod (21) is slidably abutted on the fixed frame (13), and a plurality of rollers (24) are arranged on the upper end surface of the vertical rod (21) along the left and right directions; When the vehicle falls to the ground, the lower end of the vertical rod (21) contacts the ground and the vertical rod (21) contracts. The vertical rods (21) on the left and right sides move away from each other. When the vertical rods (21) move away from each other on the ground, the ground restricts the movement of the vertical rod (21). The sliding rod (23) contracts the telescopic assembly (3). When the telescopic assembly (3) contracts to the shortest state, there is a gap between the rotating rod (22) and the sliding rod (23) and the fixed frame (13). When the telescopic assembly (3) contracts to the shortest state, the lower end of the vertical rod (21) protrudes from the lower end surface of the box body (11), and the lower end of the vertical rod (21) is in an inverted cone shape.

2. The anti-collision airdrop box according to claim 1, characterized in that: The telescopic assembly (3) includes a fixed arm (31) and a sliding arm (32). The sliding rod (23) is hinged on the sliding arm (32). A plurality of rollers (24) are provided on the end surface of the sliding arm (32) in contact with the fixed frame (13). The sliding arm (32) is telescopically extended left and right along the fixed arm (31). An elastic member (33) is provided between the fixed arm (31) and the sliding arm (32). When the telescopic assembly (3) contracts, the elastic member (33) contracts under force and its elastic potential energy increases.

3. The anti-collision airdrop box according to claim 2, characterized in that: Two rotating rods (22) are provided in parallel with each other, and the two ends of the two rotating rods (22) are respectively hinged to the vertical rod (21) and the fixed frame (13); two sliding rods (23) are provided in parallel with each other, and the two ends of the two sliding rods (23) are respectively hinged to the vertical rod (21) and the sliding arm (32). When the vertical rod (21) is extended or retracted, the rotating rod (22) and the sliding rod (23) restrict the vertical rod (21) and the fixed frame (13) to remain perpendicular.

4. The anti-collision airdrop box according to claim 1, characterized in that: A second elastic member (211) is provided in the vertical rod (21), and when the vertical rod (21) contracts in the vertical direction, the elastic potential energy of the second elastic member (211) increases.

5. The anti-collision airdrop box according to any one of claims 1 to 4, characterized in that: A plurality of the connecting rod assemblies (2) and telescopic assemblies (3) are provided on the fixed frame (13) along the front-to-back direction.

6. The anti-collision airdrop box according to claim 5, characterized in that: Limiting posts (212) are provided on both sides of the vertical rod (21), and a connecting rod (213) is provided between two adjacent vertical rods (21) at the front and rear ends. Both ends of the connecting rod (213) are respectively connected to the limiting posts (212) of the vertical rods (21) at both ends.

7. The anti-collision airdrop box according to claim 5, characterized in that: A plurality of reinforcing rods (14) are arranged in the fixing frame (13) along the front-to-back direction.

8. The anti-collision airdrop box according to claim 5, characterized in that: The box cover (12) is provided with a plurality of limiting holes (15) corresponding to the vertical rods (21).

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