Airdrop platform with high structural strength

Abstract

The utility model relates to an air drop platform with high structural strength, including chassis body, the bottom of chassis body is equipped with a plurality of damping support components, the inside of every damping support component is equipped with elastic piece and is connected with gyro wheel subassembly in the one end of elastic piece near outside, the sidewall between at least two damping support components is equipped with guide rail body still, and the mutual parallel arrangement between a plurality of guide rail bodies is set up, the utility model has realized the air drop box chassis of high structural strength, efficient multidimensional damping and the quick adaptation of airplane cargo hold convenient for, the damping support component of built-in butterfly spring and the guide rail body of gyro wheel subassembly linkage, and the safety protection under the impact of air drop material and the convenient movement in the transportation process are realized in cooperation.

Description

Technical Field

[0001] This utility model relates to the field of airdrop box technology, specifically to an airdrop platform with high structural strength. Background Technology

[0002] An airdrop container chassis is a heavy-duty logistics transfer component specifically designed for airdrop containers. Its core function is to enable efficient short-distance movement of goods in scenarios such as docks and airports. This component is typically made of robust metal materials and is securely mounted to the bottom of the airdrop container by welding or bolting, forming a stable load-bearing base. Its most significant feature is the integration of multiple sets of omnidirectional casters on the bottom, giving the large airdrop container the ability to move flexibly on flat ground, greatly facilitating forklift operation or manual pushing transfer processes. Simultaneously, the chassis is usually equipped with a reliable braking device to ensure that the airdrop container is stably fixed when parked in a designated location, preventing accidental slippage. During transportation, this structure also plays a crucial role in distributing the weight of the container and enhancing overall stability, serving as a key hardware component connecting the airdrop container to ground transportation links.

[0003] The authorization announcement number CN114852522B discloses a caster buffer protection device for airdropped supplies platforms. According to its instruction manual and drawings, the airdropped supplies platform caster buffer protection device does not require carrying an air source, which can effectively reduce the load weight. During the descent, the buffer airbag is quickly released and inflated. The combined airbag has the functions of ground cushioning and support protection. The casters can also be used for moving and transporting airdropped supplies platforms on roads.

[0004] However, the solution has certain limitations: 1. The connection structure between the casters and the caster brackets is relatively simple, which not only makes the airdrop platform lack shock absorption when stacking and transporting airdrop boxes, but also makes the structural strength of the casters and caster brackets low and prone to failure; 2. When the airdrop platform is loaded into the cargo hold of the aircraft, it cannot be effectively adapted to the roller tracks or ball bearings left on the cargo hold floor. Summary of the Invention

[0005] This utility model mainly addresses the structural design problems of airdrop platforms, and invents an airdrop platform with high structural strength. It realizes an airdrop container chassis that combines high structural strength, efficient multi-dimensional shock absorption, and easy quick adaptation to aircraft cargo holds. Its built-in shock-absorbing support components with disc springs and guide rail body linked with roller components work together to achieve safe protection of airdropped materials under impact and convenient movement during transportation.

[0006] The purpose of this invention is achieved through the following technical solution: an airdrop platform with high structural strength, including a chassis body, the bottom of which is provided with a plurality of shock-absorbing support components, each of which is provided with an elastic element inside and a roller assembly connected to one end of the elastic element near the outside, and a guide rail body is provided between the side walls of at least two shock-absorbing support components, and the plurality of guide rail bodies are arranged parallel to each other.

[0007] Preferably, the surface of the chassis body is provided with a number of countersunk holes for strengthening the structural strength and a first through hole, and the side wall of the chassis body is also provided with a number of U-shaped grooves adapted to the width of the binding rope.

[0008] Preferably, the shock-absorbing support assembly includes a shock-absorbing support base plate and a shock-absorbing support frame. The top of the shock-absorbing support base plate is connected to the bottom of the chassis body, the bottom of the shock-absorbing support base plate is connected to the top of the shock-absorbing support frame, and the bottom of the shock-absorbing support frame is connected to the roller assembly. The surface of the chassis body is provided with a plurality of first connecting holes, and each surface of the shock-absorbing support base plate and the shock-absorbing support frame are provided with a plurality of second connecting holes adapted to the first connecting holes.

[0009] Preferably, each of the shock-absorbing support frames includes a horizontal plate and vertical columns. The bottom of the horizontal plate extends downward integrally with several hollow vertical columns. The shock-absorbing support base plate is also provided with several third connecting holes. The interior of each vertical column is provided with a fourth connecting hole adapted to the third connecting hole. The interior of each vertical column is provided with an elastic element. Each of the horizontal plates is also provided with a rope limiting ring.

[0010] Preferably, the elastic element is a butterfly spring, and a locking block is installed at the top and bottom of each butterfly spring. Each locking block includes a columnar part and a threaded part integrally provided on the side wall of the columnar part. The threaded part is engaged in the gap between the thin springs on the butterfly spring by rotation. Each columnar part is provided with a fifth connecting hole adapted to the fourth connecting hole. This design provides a stable connection by screwing the threaded part of the locking block into the gap of the disc spring and fixing the columnar part with bolts through the fifth connecting hole. This ensures that the upper and lower ends of the disc spring will not become loose or misaligned with the support structure during repeated and violent compression and rebound, thus avoiding the risk of the elastic element easily shifting and failing under vibration.

[0011] Preferably, each roller assembly includes a roller support frame, a roller body, and a guide bearing. Each roller support frame is provided with a sixth connecting hole adapted to the fifth connecting hole. The roller support frame is provided with a roller support shaft inside and a plurality of guide bearings are provided on the roller support shaft. Each roller support frame is provided with a wheel body mounting groove on its surface and the roller body is disposed inside the wheel body mounting groove. The inside of the roller body is locked onto the guide bearing. This design uses guide bearings to support the roller body, which greatly reduces rolling friction resistance and makes moving heavy-duty airdrop containers easier. At the same time, the bearing structure can withstand greater radial loads, improving the service life and reliability of the roller body and adapting to the needs of frequent movement in palletizing and cargo hold.

[0012] Preferably, each roller support shaft is a bolt, with the bolt's threaded portion extending toward the center of the airdrop box chassis and the bolt head being engaged in a hole in the guide rail body. A limiting sleeve coaxially mounted on the roller support shaft is also provided between the guide rail body and the roller support frame. The end of the threaded portion is locked to the side wall of the roller support frame by a nut. Each guide rail body has at least one first oblong hole, and the bolt's threaded portion is engaged inside the first oblong hole.

[0013] Preferably, the guide rail body is also provided with a plurality of second oblong holes and second through holes, and the guide rail body is also provided with polygonal through holes and rectangular holes adapted to bolt heads, wherein the first oblong holes are disposed inside the rectangular holes. The head of the roller support shaft is locked in a polygonal through hole to prevent rotation and achieve fixation; the screw part on the other side is locked in the first oblong hole, allowing for fine adjustment in the horizontal direction; this compensates for manufacturing and installation errors and ensures that the guide rail body can be smoothly and accurately installed on chassis of different batches; the roller support shaft is locked together with the guide rail body and roller support frame by the limit sleeve and nut, forming a very stable connection and preventing loosening in a vibration environment.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The vertical columns of the shock-absorbing support frame are equipped with disc springs. When the airdrop container is impacted during stacking, transportation, or landing, the impact force is transmitted to the elastic element through the roller assembly, causing it to compress and deform. This absorbs and dissipates most of the impact energy, preventing the impact force from being directly transmitted to the chassis and the airdrop container on it, effectively protecting the supplies. The hollow design of the vertical column not only accommodates the elastic element but also plays a guiding and limiting role during its deformation, preventing the elastic element from tilting, becoming unstable, or even failing under repeated impacts, ensuring the durability and reliability of the shock absorption function. 2. The bottom of the guide rail body is in contact with the raceway, and the side wall of the roller support frame is in contact with the side wall of the raceway, forming a three-dimensional constraint. This ensures that the airdrop container chassis can only slide along the preset direction of the raceway, transforming sliding friction into low-resistance rolling. The rollers of the cargo hold rotate under the downward pressure of the guide rail body, transforming the originally heavy sliding friction into efficient rolling friction. This allows operators to easily move the entire airdrop container platform with a small thrust, even when fully loaded, greatly improving loading and unloading efficiency and ease of operation. 3. By using countersunk holes and the first through hole design, material is distributed along the most critical stress path, eliminating excess material and reducing weight. This means that during long-term, repeated use (such as multiple stackings and transportation), the material is less prone to fatigue cracks, greatly extending the product's service life. The shock-absorbing support base plate, shock-absorbing support frame, and roller assemblies are detachably connected, and the connection points can withstand the preload of bolts and working loads, enabling a modular and maintainable design. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a perspective view of the present utility model; Figure 3 This is an exploded view of the present invention; Figure 4 This is a partial cross-sectional view of the present invention; Figure 5 This is a partial cross-sectional view of the present invention.

[0016] Markings in the diagram: 1. Chassis body; 11. Countersunk hole; 12. First through hole; 13. U-shaped groove; 14. First connecting hole; 2. Shock-absorbing support assembly; 21. Shock-absorbing support base plate; 22. Shock-absorbing support frame; 221. Horizontal plate; 222. Vertical column; 23. Second connecting hole; 223. Third connecting hole; 224. Fourth connecting hole; 24. Rope limiting ring; 3. Roller assembly; 31. Roller support frame; 311 32. Sixth connecting hole; 32. Roller support shaft; 321. Screw part; 322. Head; 33. Guide bearing; 34. Roller body; 35. Limiting sleeve; 36. Nut; 4. Guide rail body; 40. First oblong hole; 41. Second oblong hole; 42. Second through hole; 43. Polygonal through hole; 44. Rectangular hole; 5. Elastic element; 6. Locking block; 61. Columnar part; 62. Threaded part; 63. Fifth connecting hole. Detailed Implementation

[0017] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings: like Figure 1 and Figure 2As shown, an airdrop platform with high structural strength includes a chassis body 1. The surface of the chassis body 1 is provided with a plurality of countersunk holes 11 for strengthening the structural strength and a first through hole 12. The side wall of the chassis body 1 is also provided with a plurality of U-shaped grooves 13 adapted to the width of the binding rope.

[0018] Several countersunk holes 11 can evenly distribute the impact force across the entire chassis body 1, avoiding localized deformation or breakage caused by stress concentration and minimizing the chassis's weight. Several first through holes 12 can be used primarily for passing ropes, straps, or connecting shackles without compromising structural strength and while reducing weight. The U-shaped curvature of the U-shaped groove 13 perfectly fits the strapping rope, reducing the rope's cutting effect and effectively preventing it from slipping laterally during transportation; this provides a reliable and efficient anchor point for securing the entire airdrop container to the chassis body 1 using strapping ropes.

[0019] Please continue to refer to the reference. Figure 2 and Figure 3 The bottom of the chassis body 1 is provided with several shock-absorbing support components 2, and each shock-absorbing support component 2 is provided with an elastic element 5 inside, and a roller assembly 3 is connected to one end of the elastic element 5 near the outside.

[0020] Specifically, the shock-absorbing support assembly 2 includes a shock-absorbing support base plate 21 and a shock-absorbing support frame 22. The top of the shock-absorbing support base plate 21 is connected to the bottom of the chassis body 1, the bottom of the shock-absorbing support base plate 21 is connected to the top of the shock-absorbing support frame 22, and the bottom of the shock-absorbing support frame 22 is connected to the roller assembly 3. The surface of the chassis body 1 is provided with a plurality of first connecting holes 14, and each surface of the shock-absorbing support base plate 21 and the shock-absorbing support frame 22 is provided with a plurality of second connecting holes 23 adapted to the first connecting holes 14. With this configuration, both the shock-absorbing support base plate 21 and the shock-absorbing support frame 22 are detachably connected; and they are also detachably connected relative to the bottom of the chassis body 1. During installation, the four second connection holes 23 on the shock-absorbing support base plate 21 and the shock-absorbing support frame 22 are aligned with several first connection holes 14 on the surface of the chassis body 1, and then secured with bolts. The shock-absorbing support base plate 21 and the shock-absorbing support frame 22 are detachably connected via the second connection holes 23.

[0021] Please refer to Figure 3 and Figure 4Each of the shock-absorbing support frames 22 includes a horizontal plate 221 and a vertical column 222. The bottom of the horizontal plate 221 is integrally provided with a plurality of hollow vertical columns 222. The shock-absorbing support base plate 21 is also provided with a plurality of third connecting holes 223. Each vertical column 222 is provided with a fourth connecting hole 224 adapted to the third connecting hole 223. Each vertical column 222 is provided with an elastic element 5. Each of the horizontal plates 221 is also provided with a rope limiting ring 24. To further enhance the connection strength between the shock-absorbing support base plate 21 and the shock-absorbing support frame 22: the fourth connecting hole 224 inside each vertical column 222 is aligned with the third connecting hole 223 on the shock-absorbing support base plate 21 and then locked with bolts.

[0022] The hollow vertical column 222 can protect the elastic element 5 as much as possible: during the deformation process, most of the area of ​​the elastic element 5 is still protected by the side wall of the vertical column 222. The interior of the vertical column 222 can also provide guidance support during the deformation of the elastic element 5, preventing skewing after multiple deformations.

[0023] by Figure 2 For reference, since the U-shaped groove 13 on the surface of the chassis body 1, from left to right, only restricts the airdrop box from sliding left and right after being secured to the surface of the chassis body 1 with ropes, it cannot effectively restrict the airdrop box from sliding down. Therefore, the interior of the U-shaped groove 13 from top to bottom also needs to be secured with ropes. During the securing process, the rope passes through the interior of the upper and lower rope limiting rings 24 sequentially from the interior of the upper U-shaped groove 13 until it is stuck inside the interior of the lower U-shaped groove 13, and then continues to wrap around and fix the airdrop box on the surface of the chassis body 1. Since there is a relatively wide gap between the rope limiting ring 24 and the roller assembly 3, this setup can still complete the securing of the airdrop box on the surface of the chassis body 1 without affecting the normal guiding and rolling of the roller assembly 3.

[0024] Please continue to refer to this. Figure 4 To further enable the elastic element 5 to be installed inside the vertical column 222 without affecting deformation, the elastic element 5 is a butterfly spring. Each butterfly spring has a locking block 6 installed at its top and bottom. Each locking block 6 includes a columnar part 61 and a threaded part 62 integrally provided on the side wall of the columnar part 61. The interior of each columnar part 61 is provided with a fifth connecting hole 63 adapted to the fourth connecting hole 224.

[0025] During implementation, the threaded portions 62 of the two locking blocks 6 are first engaged by rotation into the gap between the top and bottom leaf springs of the disc spring. Next, for the innermost part of each columnar portion 61, the fifth connecting hole 63 of the locking block 6 is coaxially aligned with the fourth connecting hole 224 inside the columnar portion 61 and then fixedly connected by bolts. At this point, with the locking blocks 6 limiting its position, the top of the elastic element 5 is fixedly installed inside the columnar portion 61, and the position of the top of the elastic element 5 cannot change.

[0026] Because the bottom of the elastic element 5 can deform, and the bottom of the elastic element 5 extends outward and is fixedly connected to the roller assembly 3 through the second locking block 6; therefore, whenever the roller assembly 3 is rolling and encounters potholes or changes in the load on the surface of the chassis body 1, the elastic element 5 is deformed by force and returns to its original position after the force is released. However, only the height of the elastic element 5 changes, and the deformation of the elastic element 5 offsets the impact force.

[0027] Please refer to the reference. Figure 3 and Figure 5 Each roller assembly 3 includes a roller support frame 31, a roller body 34, and a guide bearing 33. Each roller support frame 31 is provided with a sixth connecting hole 311 adapted to the fifth connecting hole 63. The roller support frame 31 is provided with a roller support shaft 32 inside, and a plurality of guide bearings 33 are provided on the roller support shaft 32. The surface of each roller support frame 31 is provided with a wheel body mounting groove, and the roller body 34 is disposed inside the wheel body mounting groove. The inside of the roller body 34 is locked onto the guide bearing 33.

[0028] Since each set of shock-absorbing support frame 22 is provided with four columnar parts 6, the sixth connecting hole 311 on the roller support frame 31 is aligned with the locking block 6 at the bottom of the elastic member 5 inside each columnar part 6. Then, the sixth connecting hole 311 and the fifth connecting hole 63 are locked together by bolts, thereby completing the fixed connection between the shock-absorbing support frame 22 and the bottom of the elastic member 5. The deformation of the elastic member 5 can drive the position of the roller support frame 31 to change.

[0029] Once the airdrop box on the surface of the chassis body 1 is bound, the roller body 34 remains in contact with the ground or floor and rolls during the stacking process. The guide bearing 33 provides support and guidance during the rolling process.

[0030] Please continue to refer to this. Figure 1 , Figure 2 and Figure 3At least two shock-absorbing support components 2 are provided with guide rail bodies 4 between their sidewalls, and several guide rail bodies 4 are arranged parallel to each other. Each roller support shaft 32 is a bolt, with the bolt shank 321 extending toward the center of the airdrop box chassis and the bolt head 322 being engaged in a hole left in the guide rail body 4. The guide rail body 4 is also provided with several second oblong holes 41 and second through holes 42. The guide rail body 4 is also provided with polygonal through holes 43 and rectangular holes 44 adapted to the bolt head 322. The first oblong holes 40 are located inside the rectangular holes 44. A limiting sleeve 35 coaxially mounted on the roller support shaft 32 is also provided between the guide rail body 4 and the roller support frame 31. The end of the screw part 321 is locked to the side wall of the roller support frame 31 by a nut 36. Each guide rail body 4 has at least one first waist-shaped hole 40 and the screw part 321 of the bolt is stuck inside the first waist-shaped hole 40.

[0031] by Figure 2 The direction is used as a reference base. The second oblong hole 41 and the second through hole 42 reduce weight without affecting structural strength. The head 322 of the roller support shaft 32 inside the roller support frame 31 on the left is locked inside the polygonal through hole 43 on the guide rail body 4, so the left end of the guide rail body 4 is fixed. The roller support frame 31 on the right may have a certain error in its horizontal position relative to the chassis body 1 after installation. Therefore, the screw part 321 of the roller support shaft 32 inside the roller support frame 31 on the right is locked inside the first oblong hole 40. The end of the screw part 321 is locked to the side wall of the roller support frame 31 by a nut 36 to prevent the position of the roller support shaft 32 from shifting.

[0032] During implementation, when the chassis body 1 is pushed into the cargo hold of the aircraft, the bottom of the two guide rail bodies 4 set at the bottom of the chassis body 1 will fit against the pre-reserved roller tracks or rollers on the cargo hold. In addition, the side wall of the roller support frame 31 fits against the side wall of the roller track or roller, thus completing the fit. This ensures that after the guide rail bodies 4 at the bottom of the chassis body 1 are stuck in the pre-reserved roller tracks or rollers on the cargo hold, they can only slide along the set trajectory and cannot deviate.

[0033] The pre-installed tracks or rollers in the aircraft cargo hold provide a principle similar to a roller conveyor line. Due to the downward pressure of the airdrop box on the surface of the chassis body 1 and the limitation of the side wall of the roller support frame 31, the pre-installed rollers in the cargo hold rotate during the movement of the chassis body 1, thereby reducing friction: the sliding friction between the chassis body 1 and the cargo hold floor is transformed into low-resistance rolling of the rollers, making it easy to move even heavier cargo.

[0034] Working principle and usage of this utility model: The chassis body 1 serves as the core load-bearing platform. The countersunk holes 11 on its surface, by changing the material thickness, smoothly transmit and disperse the impact force or pressure borne locally to the entire chassis area, effectively avoiding stress concentration. This reduces the self-weight while preventing local deformation or breakage.

[0035] While further reducing weight, the first through hole 12, with its U-shaped groove 13, uses its arc design to perfectly fit the binding rope, evenly applying the binding force of the rope to the side wall, and providing a reliable lateral anchoring point for the box.

[0036] When the chassis is subjected to an impact from the ground (such as during landing or on uneven surfaces), the impact force is transmitted to the roller support frame 31 through the roller assembly 3, which in turn compresses the elastic element 5 (disc spring). The disc spring undergoes elastic deformation, absorbing and storing the impact energy, and then releasing it, thereby achieving cushioning. The vertical column 222 of the shock-absorbing support frame 22 provides guidance and protection for the deformation of the disc spring, ensuring its stable operation and preventing tilting.

[0037] Multiple shock-absorbing support components 2 distributed around the bottom of the chassis together form a stable shock absorption system, which can cope with impacts and bumps from different directions.

[0038] The shock absorber support assembly 2 is bolted to the chassis first connection hole 14 via the second connection hole 23 on the shock absorber support base plate 21 and the shock absorber support frame 22, thus achieving modularity. This design facilitates transportation, storage, and rapid replacement in case of damage.

[0039] The guide rail body 4 at the bottom of the chassis is specifically designed to fit the aircraft cargo hold roller conveyor system. The guide rail body 4 snaps into the cargo hold roller conveyor, and the polygonal through holes 43 and the first oblong hole 40 on it cooperate with the roller support shaft 32 to ensure that the chassis is precisely confined within the roller conveyor and can only move in a preset direction. At the same time, the contact between the roller body 34 and the cargo hold rollers changes sliding friction into rolling friction, making the movement of heavy objects easy.

[0040] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An airdrop platform with high structural strength, comprising a chassis body (1), characterized in that, The bottom of the chassis body (1) is provided with several shock-absorbing support components (2). Each shock-absorbing support component (2) is provided with an elastic element (5) inside and a roller assembly (3) is connected to one end of the elastic element (5) near the outside. At least two shock-absorbing support components (2) are also provided with guide rail bodies (4) between their side walls. Several guide rail bodies (4) are arranged parallel to each other.

2. The airdrop platform with high structural strength according to claim 1, characterized in that, The surface of the chassis body (1) is provided with a number of countersunk holes (11) for strengthening the structural strength and a first through hole (12). The side wall of the chassis body (1) is also provided with a number of U-shaped grooves (13) adapted to the width of the binding rope.

3. The airdrop platform with high structural strength according to claim 2, characterized in that, The shock-absorbing support assembly (2) includes a shock-absorbing support base plate (21) and a shock-absorbing support frame (22). The top of the shock-absorbing support base plate (21) is connected to the bottom of the chassis body (1), the bottom of the shock-absorbing support base plate (21) is connected to the top of the shock-absorbing support frame (22), and the bottom of the shock-absorbing support frame (22) is connected to the roller assembly (3). The surface of the chassis body (1) is provided with a plurality of first connection holes (14), and each surface of the shock-absorbing support base plate (21) and the shock-absorbing support frame (22) is provided with a plurality of second connection holes (23) adapted to the first connection holes (14).

4. The airdrop platform with high structural strength according to claim 3, characterized in that, Each of the shock-absorbing support frames (22) includes a horizontal plate (221) and a vertical column (222). The bottom of the horizontal plate (221) extends downward integrally with several hollow vertical columns (222). The shock-absorbing support base plate (21) is also provided with several third connecting holes (223). Each vertical column (222) is provided with a fourth connecting hole (224) adapted to the third connecting hole (223). Each vertical column (222) is provided with an elastic element (5). Each horizontal plate (221) is also provided with a rope limiting ring (24).

5. The airdrop platform with high structural strength according to claim 4, characterized in that, The elastic element (5) is a butterfly spring. Each butterfly spring has a locking block (6) installed at its top and bottom. Each locking block (6) includes a columnar part (61) and a threaded part (62) integrally provided on the side wall of the columnar part (61). The threaded part (62) is engaged in the gap between the thin springs on the butterfly spring by rotation. Each columnar part (61) has a fifth connecting hole (63) adapted to the fourth connecting hole (224).

6. The airdrop platform with high structural strength according to claim 5, characterized in that, Each roller assembly (3) includes a roller support frame (31), a roller body (34), and a guide bearing (33). Each roller support frame (31) is provided with a sixth connecting hole (311) adapted to the fifth connecting hole (63). The roller support frame (31) is provided with a roller support shaft (32) inside and a plurality of guide bearings (33) are provided on the roller support shaft (32). The surface of each roller support frame (31) is provided with a wheel mounting groove and the roller body (34) is disposed inside the wheel mounting groove. The inside of the roller body (34) is locked on the guide bearing (33).

7. The airdrop platform with high structural strength according to claim 6, characterized in that, Each of the roller support shafts (32) is a bolt, with the bolt shank (321) extending toward the center of the airdrop box chassis and the bolt head (322) being engaged in a hole in the guide rail body (4). A limiting sleeve (35) coaxially mounted on the roller support shaft (32) is also provided between the guide rail body (4) and the roller support frame (31). The end of the shank (321) is locked to the side wall of the roller support frame (31) by a nut (36). Each of the guide rail bodies (4) has at least one first waist-shaped hole (40) and the bolt shank (321) is engaged in the first waist-shaped hole (40).

8. The airdrop platform with high structural strength according to claim 7, characterized in that, The guide rail body (4) is also provided with a number of second waist-shaped holes (41) and second through holes (42). The guide rail body (4) is also provided with a polygonal through hole (43) adapted to the bolt head (322) and a rectangular hole (44). The first waist-shaped hole (40) is located inside the rectangular hole (44).

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