Low altitude umbrella free release of airdrop box

Abstract

The utility model discloses a low altitude umbrellaless delivery air drop box, including box and lid, box and lid cooperate with each other, and the upper portion of box side edge and the lower portion of lid side edge are equipped with convex edge and recess respectively, and box is double -deck structure, and the lid is also double -deck structure, and the inside of box and lid is equipped with batten, and box and lid all adopt hollow structure and are coated with high elasticity polyurea coating outside, so this can effectively reduce the weight of air drop box itself, and raw material adopts ultrahigh molecular weight polyethylene, and is coated with elastomer outside, absorbs the impulse when low altitude delivery falls to the ground, can good protection transportation and improve the reusable number of delivery box, and through the installation of breather valve, through the mode of discharging the air in the cavity can absorb the impact potential energy during the landing process, reduce the impact that the box receives, namely, when landing, the cavity is extruded to make the internal gas release to the box outside to realize energy conversion, slow down the impact, protect the safety of goods.

Description

Technical Field

[0001] This utility model relates to the field of airdrop box technology, specifically a low-altitude, parachute-free airdrop box. Background Technology

[0002] Traditional airdrop containers typically rely on parachutes for cushioned landings, which has the following technical drawbacks: They depend on parachutes, making operation cumbersome, requiring 5-10 minutes to assemble the parachute before airdrop, thus wasting time and being inefficient in emergency situations; the parachutes are susceptible to wind influences, leading to landing point deviations, and the success rate of parachute deployment is low at low altitudes below 100 meters; the parachute pack occupies container space, reducing effective payload capacity; and the parachute is a consumable, resulting in high costs per use and requiring regular checks on parachute line strength and packaging sealing, making maintenance complex. Therefore, parachuteless airdrop technology is often used for low-altitude deployments.

[0003] Parachuteless airdrop containers are equipment designed for safe airdrop without the aid of parachutes. They are primarily used for rapid delivery of supplies at low altitudes (typically less than 200 meters) and are suitable for scenarios such as military resupply, emergency rescue, and disaster relief. The purpose of rapid supply delivery is achieved by directly dropping the airdrop container. However, current airdrop containers are relatively heavy, and direct dropping after being fully filled with supplies can result in damage. Utility Model Content

[0004] (I) Technical Solution

[0005] To solve the above-mentioned technical problems, this utility model provides a low-altitude, umbrella-free airdrop box.

[0006] The specific technical solution is as follows: A low-altitude parachute-free airdrop box includes a box body and a cover body. The box body and the cover body cooperate with each other. The upper part of the side of the box body and the lower part of the side of the cover body are respectively provided with protruding ridges and grooves. The box body and the cover body are connected by the protruding ridges and grooves. The box body has a double-layer structure, specifically including an inner box body and an outer box body. A cavity is formed between the inner box body and the outer box body. The cavity surrounds the four sides and the bottom of the inner box body. Several ribs are provided in the cavity on the four sides and the bottom. The ribs in the cavity on the four sides are arranged vertically, and each vertically arranged rib has a hole. The cover body has a double-layer structure, specifically including an inner cover body and an outer cover body. A cavity is formed between the inner cover body and the outer cover body. The cavity surrounds the four sides and the upper part of the inner cover body. Several ribs are provided in the cavity on the four sides and the upper part. The ribs in the cavity on the four sides are arranged vertically. The outer box body is covered with an elastic coating.

[0007] Furthermore, the inner box, the outer box, and the ribs between the inner box and the outer box are integrally formed, as are the inner cover, the outer cover, and the ribs between the inner cover and the outer cover.

[0008] Furthermore, the box and the cover are made of ultra-high molecular weight polyethylene.

[0009] Furthermore, the elastic coating is made of polyurea and has a thickness of 30-60 mm.

[0010] Furthermore, the outer casing is provided with at least one vent valve, which is a one-way valve. The two ends of the vent valve are respectively connected to the inner cavity of the casing and the external atmosphere, and the gas is exhausted from the cavity of the casing to the outside of the casing.

[0011] Furthermore, the vent valve specifically includes a housing, a valve core, and a spring. The housing has a wedge-shaped protrusion inside. The valve core includes a sealing part, an air inlet part, and a connecting part. The two ends of the connecting part are respectively connected to the air inlet part and the sealing part. The air inlet part is hollowed out for air intake. A rubber ring is fitted on the sealing part and its position corresponds to the wedge-shaped protrusion of the housing. The spring is fitted on the connecting part and its two ends are in contact with the air inlet part and the wedge-shaped protrusion, respectively, so that the rubber ring is squeezed and sealed by the inclined surface of the wedge-shaped protrusion.

[0012] (ii) Beneficial effects

[0013] Compared with the prior art, the technical solution proposed in this utility model adopts a hollow structure for both the box and the lid, and is coated with a highly elastic polyurea coating on the outside. This can effectively reduce the weight of the airdrop box itself. In addition, the raw material is ultra-high molecular weight polyethylene, and the outer coating is an elastomer, which absorbs the impact when the box lands at low altitude, which can effectively protect the transport and increase the number of times the box can be reused. At the same time, by adding a vent valve, the impact potential energy during the landing process can be partially absorbed by expelling the air in the cavity, reducing the impact on the box. That is, when the box lands, the cavity is compressed, which releases the internal gas to the outside of the box to realize energy conversion, reduce the impact, and protect the safety of the items. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the internal structure of the box.

[0017] Figure 3 This is a schematic diagram of the internal structure of the cover.

[0018] Figure 4 This is a schematic diagram of the breather valve structure. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0020] To address the problems existing in the relevant prior art, this utility model proposes a low-altitude, parachute-free airdrop box. The principle and structure of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0021] Please see Figure 1 and Figure 4 The specific solution is as follows: A low-altitude parachute-free airdrop box includes a box body 1 and a cover body 2. The box body 1 and the cover body 2 cooperate to form a sealed container that can hold supplies. The upper side of the box body 1 and the lower side of the cover body 2 are respectively provided with protrusions 3 and grooves 4. The box body 1 and the cover body 2 are connected by the protrusions 3 and grooves 4. In specific applications, the protrusions and grooves adopt an interference fit to fix the box body 1 and the cover body 2 during connection. The box body 1 has a double-layer structure, specifically including an inner box body 101 and an outer box body 102. A cavity is formed between the inner box body 101 and the outer box body 102. The cavity surrounds the four sides and bottom of the inner box body 101, and a number of ribs 103 are provided in the cavity of the four sides and bottom of the box body 1. The ribs located in the cavity of the four sides of the box body 1 The ribs 103 are arranged vertically, and each vertically arranged rib 103 has a hole 104. The structure of the cover 2 is the same as that of the box, which is also a double-layer structure, specifically including an inner cover 201 and an outer cover 202. A cavity is formed between the inner cover 201 and the outer cover 202. The cavity surrounds the four sides and the top of the inner cover 201. Several ribs 203 are provided in the cavity on the four sides and the top of the cover 2. The ribs 203 in the cavity on the four sides of the cover 2 are arranged vertically. The difference between the structure of the cover 2 and the structure of the box 1 is that there are no holes on the ribs 203 inside the cover 2. The outer box 102 is covered with an elastic coating 5. In specific applications, in order to prevent the cover from falling downwards when it is dropped, an elastic coating 5 can also be covered on the outer side of the outer cover.

[0022] The inner box 101, the outer box 102, and the ribs 103 between the inner box 101 and the outer box 102 are integrally formed. The inner cover 201, the outer cover 202, and the ribs 203 between the inner cover 201 and the outer cover 202 are also integrally formed. The above integral structure can be formed by rotational molding process, as well as other processes that can achieve integral forming. This is only an example and not a specific limitation. The inner cover, the outer cover, and the ribs between the inner cover and the outer cover are also integrally formed.

[0023] Specifically, the material used for both the box body 1 and the cover body 2 is ultra-high molecular weight polyethylene (UHMWPE). UHMWPE generally refers to polyethylene with a relative molecular mass of 150*10⁻⁶. 4 Specifically, in this embodiment, the selected ultra-high molecular weight polyethylene has the following parameters:

[0024] Density: 950 kg / m³ 3 ;

[0025] The elastic modulus is 1.1 GPa;

[0026] Yield stress: 20-30 MPa;

[0027] Tangent modulus: 0.1-0.5 GPa.

[0028] Furthermore, the elastic coating 5 is made of polyurea, an elastomer with extremely high elongation, typically exceeding 300%-1000%. This effectively absorbs impact, adapts to substrate deformation, and is less prone to cracking. It also possesses high tensile strength, giving the coating excellent tear and impact resistance. Applying it to the outer surfaces of the housing 1 and the cover 2 effectively absorbs the impact of the housing landing. In this embodiment, the parameters of the polyurea used are as follows:

[0029] Density: 1070 kg / m³ 3

[0030] Young's modulus: 150 MPa;

[0031] Poisson's ratio: 0.465

[0032] And the thickness is 30-60mm.

[0033] The outer casing 102 is equipped with at least one vent valve 6. The vent valve 6 is a one-way valve, and its two ends are connected to the internal cavity of the casing 1 and the external atmosphere, respectively. Gas is exhausted from the cavity of the casing 1 to the outside of the casing 1. When the casing 1 is dropped and an impact occurs, the internal cavity of the casing 1 is impacted, causing the air in the cavity to be discharged from the vent valve 6 to the outside air. During the exhaust process, a portion of the impact can be absorbed, thereby reducing the impact on the casing and protecting the safety of the items.

[0034] In the above scheme, both the box body 1 and the cover body 2 adopt a hollow structure and are coated with a highly elastic polyurea coating on the outside. The double-layer structure can effectively reduce the weight of the box body and the cover body and reduce their impact potential energy. At the same time, the elastic coating 5 is set on the outside, which can effectively absorb the impact when the low-altitude delivery lands, and can protect the transportation and increase the number of times the delivery box can be reused.

[0035] The vent valve 6 specifically includes a housing 601, a valve core 602, and a spring 603. The housing 601 has a wedge-shaped protrusion 6011 inside. The valve core 602 includes a sealing part 6021, an air inlet part 6022, and a connecting part 6023. The two ends of the connecting part 6023 are respectively connected to the air inlet part 6022 and the sealing part 6021. The air inlet part 6022 is hollowed out for air intake. A rubber ring 604 is fitted on the sealing part 6021 and its position corresponds to the wedge-shaped protrusion 6011 of the housing 601. The spring 603 is fitted on the connecting part 6023 and its two ends are in contact with the air inlet part 6022 and the wedge-shaped protrusion 6011, so that the rubber ring 604 is pressed and sealed by the inclined surface of the wedge-shaped protrusion 6011.

[0036] In the above scheme, the air intake 6022 is located near the cavity, and the inside is filled with air and the air pressure is the same as the outside air pressure. When the box 1 lands, the outer box 102 will undergo elastic deformation, which will compress the air in the cavity between the inner box 101 and the outer box 102. This causes the internal air to push the valve core 602 to move and compress the spring 603. At this time, the inside and outside are connected, and the gas is discharged from the cavity. When the impact ends, the internal and external air pressure balances and returns to the sealed state. In this way, some kinetic energy can be absorbed through the air discharge process, thereby reducing the impact on the box and protecting the safety of the items.

[0037] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A low-altitude, parachute-free airdrop container, characterized in that: The device includes a housing and a lid, which fit together. The upper side of the housing and the lower side of the lid are respectively provided with protruding ridges and grooves, which are used to connect the housing and lid. The housing has a double-layer structure, specifically including an inner housing and an outer housing, with a cavity formed between them. The cavity surrounds the four sides and bottom of the inner housing, and several ribs are provided within the cavity on the four sides and bottom. The ribs in the four-sided cavity are arranged vertically, and each vertically arranged rib has a hole. The lid also has a double-layer structure, specifically including an inner lid and an outer lid, with a cavity formed between them. The cavity surrounds the four sides and upper part of the inner lid, and several ribs are provided within the cavity on the four sides and upper part. The ribs in the four-sided cavity are arranged vertically. The outer housing is covered with an elastic coating.

2. The low-altitude parachute-free airdrop container according to claim 1, characterized in that: The inner box, the outer box, and the ribs between the inner box and the outer box are integrally formed, as are the inner cover, the outer cover, and the ribs between the inner cover and the outer cover.

3. The low-altitude parachute-free airdrop container according to claim 2, characterized in that: The box and the cover are made of ultra-high molecular weight polyethylene.

4. The low-altitude parachute-free airdrop container according to claim 3, characterized in that: The elastic coating is made of polyurea and has a thickness of 30-60 mm.

5. A low-altitude, parachute-free airdrop container according to claim 4, characterized in that: The outer casing is equipped with at least one vent valve, which is a one-way valve. The two ends of the vent valve are respectively connected to the inner cavity of the casing and the outside atmosphere, and the gas is exhausted from the cavity of the casing to the outside of the casing.

6. A low-altitude, parachute-free airdrop container according to claim 5, characterized in that: The vent valve specifically includes a housing, a valve core, and a spring. The housing has a wedge-shaped protrusion inside. The valve core includes a sealing part, an air inlet part, and a connecting part. The two ends of the connecting part are respectively connected to the air inlet part and the sealing part. The air inlet part is hollowed out for air intake. A rubber ring is fitted on the sealing part and its position corresponds to the wedge-shaped protrusion of the housing. The spring is fitted on the connecting part and its two ends are in contact with the air inlet part and the wedge-shaped protrusion, respectively, so that the rubber ring is squeezed and sealed by the inclined surface of the wedge-shaped protrusion.

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