Pre-tightening compensation type air-drop platform and rotational molding method thereof

Abstract

The invention discloses a pre-tightening compensation type air-drop platform and a forming method thereof, and belongs to the technical field of air-drop equipment. The air-drop platform comprises a bearing plate, a binding belt, a netting gear and an external supporting frame, the bearing plate is used for bearing goods, the binding belt is used for fixing the goods to the bearing plate, and the netting gear covers the goods and works cooperatively with the binding belt. The installation embedded part is embedded in the bearing plate and comprises a binding belt embedded seat and a support embedded seat, and the binding belt embedded seat is composed of a binding belt mooring pipe and a fixing flange and used for being connected with a binding belt. The external supporting frame is cast by adopting an aluminum alloy material, is symmetrically distributed at the bottom of the bearing plate in a pi shape, structurally comprises a supporting base frame and a reinforcing flange, and is stably connected with the bearing plate through a bracket embedded seat. According to the forming method, a rotational molding process is adopted, the installation embedded part is embedded into the inner wall of a rotational molding mold, the bearing plate material wraps and tightly wraps the installation embedded part, and integral forming is achieved. By means of the structure, connecting points can be stabilized, and the binding belt is effectively prevented from loosening.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air-drop equipment, in particular to a pre-tightening compensation type air-drop platform and a forming method thereof. BACKGROUND

[0002] Air-drop technology is a technical means of delivering supplies, equipment or personnel from the air to the ground by using an airplane, which is widely used in military supply, emergency disaster relief, and delivery of supplies in remote areas. The air-drop platform, as the core component of the air-drop system, is mainly used to carry and constrain the goods to be delivered, to ensure the stability of the goods during the air-drop process, and to effectively protect the goods from impact damage during landing.

[0003] In the prior art, the carrying and constraining module of the air-drop platform is usually composed of a carrying plate, a net and a binding belt. The carrying plate is usually made of wood, metal or plastic materials, and has a rectangular flat plate structure for directly carrying goods. The binding belt is connected to the mooring point at the edge of the carrying plate and cooperates with the net covering the goods above to firmly fix the goods on the carrying plate through the tensioning force to form a whole unit for air-drop operation.

[0004] Regarding the goods binding technology, there are many solutions in the prior art. For example, patent document CN1019658B discloses a tensioning ratchet device for binding belts, which applies tension stress to the binding belt step by step through a ratchet mechanism to achieve safe fixation of the goods. The patent points out that when transporting at a higher binding tension, additional stress may be added to the binding belt due to the displacement of the goods, and the so-called "whip effect" may occur on the binding belt when it is loosened, which poses a threat to the safety of the unloading personnel. In addition, patent document CN2895840Y discloses a new type of elastic pre-tightening mechanism, which realizes precise control of pre-tightening force through the cooperation of a spring and a conical lock block, and has the advantages of constant pre-tightening force, stable work, etc.

[0005] However, when the above-mentioned goods binding system of the prior art is applied to the air-drop platform, the following technical defects still exist: Firstly, in some geographical environments, such as uneven ground and strong wind, the air-drop platform may tilt and hit the ground when landing, causing the corners of the carrying plate to break. Since the traditional mooring point is directly arranged at the edge of the carrying plate, when the corners of the carrying plate are broken, the cracks are likely to extend to the middle part of the carrying plate along the thinner part of the wall, thereby damaging the plate structure at the mooring point, and making the binding belt lose the fixing point. Once one of the binding belts loses the restraining effect, it often leads to uneven force on the goods, and then causes a chain of imbalance and instability of other binding belts, eventually leading to the failure of the whole binding system to constrain the goods, causing the risk of goods falling or scattering, and seriously affecting the safety and reliability of the air-drop operation.

[0006] Secondly, the existing binding system of the air drop platform mostly adopts passive constraint mode, that is, only relying on the tension of the binding belt to fix the goods, lacking active pre-tightening compensation mechanism. When the local damage of the bearing plate causes the structural integrity to be damaged, the wrapping tightness of the bearing plate to the tether point is weakened or disappears, and the tension of the binding belt may be weakened or even lost, which cannot form a sustained and effective constraint on the goods, lacking a compensation structure capable of actively releasing pre-stress to resist the change of the tension of the binding belt.

[0007] Therefore, how to keep the connection fixing point of the binding belt stable and effective in the case of damage of the bearing plate, and realize the sustained and reliable fixation of the goods through the pre-tightening compensation mechanism, becomes a technical problem to be solved in the field. SUMMARY

[0008] In view of the technical problem that the binding belt is easy to lose the fixing point when the existing air drop platform is damaged on landing, the application provides a pre-tightening compensation type air drop platform and a forming method thereof.

[0009] To solve the above technical problems, the application adopts the following technical solutions: In a first aspect, the application provides a pre-tightening compensation type air drop platform, comprising: a bearing plate for bearing goods; a binding belt for fixing the goods on the bearing plate; a mounting embedded part symmetrically embedded in the bearing plate as a connection component of the binding belt; an external support frame provided at the bottom of the bearing plate and connected with the bearing plate through the mounting embedded part; Wherein, the binding belt is connected with the external support frame through the mounting embedded part, so that the connection fixing point of the binding belt is transferred from the bearing plate to the external support frame, so as to keep the fixing effect of the binding belt when the bearing plate is damaged.

[0010] Further, the mounting embedded part includes a binding belt embedded seat and a support embedded seat, the binding belt embedded seat is used for connecting with the binding belt, and the support embedded seat is used for connecting the external support frame with the bearing plate.

[0011] Further, the external support frame has two groups and is symmetrically distributed at the bottom of the bearing plate, and the whole is arranged in a "pi" shape, having four end portions each located at the edge of the bearing plate, the binding belt embedded seat is provided at the four end portions, and the support embedded seat has a plurality of and is uniformly distributed at the remaining positions of the external support frame except the end portions.

[0012] Further, the binding strap pre-embedded seat comprises a binding strap retaining pipe and a fixing flange, the binding strap retaining pipe is used for the binding strap to pass through, and the fixing flange is used for being connected with the outer support frame.

[0013] Further, the outer support frame comprises a support base frame and a reinforcing flange, and the outer support frame is made of an aluminum alloy material.

[0014] In a second aspect, the present application further provides another pre-tightening compensation type air drop platform, which comprises: a bearing plate for bearing goods; a binding strap for fixing the goods on the bearing plate; a pre-tightening pre-embedded part pre-embedded in the bearing plate, comprising a central base frame and a pre-tightening connecting assembly arranged on the central base frame, and the binding strap is connected to the pre-tightening connecting assembly; wherein the central base frame is integrally connected with the bearing plate, and the pre-tightening connecting assembly is arranged in a gap with the bearing plate; the pre-tightening connecting assembly comprises an elastic stress part and a binding strap retaining point, one end of the elastic stress part is connected with the central base frame, the other end of the elastic stress part is connected with the binding strap retaining point, the binding strap is connected to the binding strap retaining point, and the elastic stress part stores a pre-stress.

[0015] Further, the pushing direction of the elastic stress part to the binding strap retaining point is opposite to the pulling direction of the binding strap to the binding strap retaining point.

[0016] Further, the elastic stress part is an arc-shaped stress plate, which is in an arc shape of arching upward in a natural state.

[0017] Further, the central base frame comprises four edge frame rods connected head to tail to form a rectangular frame, and the pre-tightening connecting assembly has four groups which are vertically connected to the four edge frame rods respectively.

[0018] Further, the pre-tightening connecting assemblies opposite to each other are symmetrically arranged.

[0019] In a third aspect, the present application further provides a forming method of the pre-tightening compensation type air drop platform, which comprises the following steps: S1, pre-embedded part positioning: fixing the pre-tightening pre-embedded part in the inner wall of the upper mold of the rotational molding mold, and using a barrier sheet to isolate the pre-tightening connecting assembly from the inner wall of the upper mold, the barrier sheet deforms the elastic stress part to store a pre-stress; S2, mold closing: filling the powder raw material of the bearing plate into the lower mold, closing and locking the upper mold and the lower mold to form a closed hollow cavity; S3, rotational molding: the mold is heated by rotational molding, the powder raw material is melted and uniformly distributed in the inner wall of the mold, the center base frame and the binding tethering point are coated, and the prestress stored in the elastic stress member is locked; S4, demolding: after cooling, the molded pre-tightening compensation type air-drop platform is taken out, and a gap is formed between the pre-tightening connecting assembly and the bearing plate.

[0020] The beneficial effects of the present application are: By setting the cooperation structure of the installation embedded part and the external support frame, the connection fixing point of the binding belt is transferred from the bearing plate to the external support frame with stronger rigidity, when the bearing plate is damaged, the external support frame can provide a stable connection fixing point for the binding belt due to its rigidity and structural strength, avoiding the direct loss of the fixing effect of the binding belt caused by the damage of the bearing plate.

[0021] By setting the pre-tightening embedded part, the prestress stored in the elastic stress member is released, and the restoring force is generated when the bearing plate is damaged and the wrapping tightness is weakened or disappears, the restoring force resists the tension of the binding belt, effectively preventing the binding belt from relaxing, and realizing the continuous and reliable fixing of the goods.

[0022] The rotational molding integrated forming process is adopted to tightly connect the installation embedded part or the pre-tightening embedded part with the bearing plate, simplify the production process, improve the production efficiency, and at the same time ensure the integrity and reliability of the structure. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic view of example 1; Figure 2 It is a sectional view of the embedded part embedded in the bearing plate of example 1; Figure 3 It is a structural schematic view of the binding belt bound to the external support frame of example 1; Figure 4 It is a connection schematic view of the external support frame and the embedded part of example 1; Figure 5 It is Figure 4 The enlarged view at the middle I; Figure 6 Example 2 overall top view (bearing plate, pre-tightening embedded part, roller mounting seat); Figure 7 Example 2 pre-tightening embedded part perspective view (showing the working state and overall structure of the binding belt); Figure 8 Example 2 pre-tightening embedded part detailed structure view (arc-shaped stress plate, connecting rod, binding belt tethering point, fixing seat); Figure 9 Example 2 limit plate enlarged detail view; Figure 10 Figure 2 of the force direction principle (the opposing direction of the arc-shaped stress plate and the binding belt); Explanation of reference signs General reference signs: 01 - goods; 10 - bearing plate; 20 - binding belt; 30 - net; 60 - roller mounting seat.

[0024] Example 1 related reference signs: 40 - mounting embedded part; 41 - binding belt embedded seat; 411 - binding belt retaining pipe; 412 - fixing flange; 42 - support embedded seat; 50 - external support frame; 51 - support base frame; 52 - reinforcing flange.

[0025] Example 2 related reference signs: 70 - pre-tightening embedded part; 71 - center base frame; 711 - frame rod; 72 - pre-tightening connecting assembly; 721 - arc-shaped stress plate; 7211 - limiting plate; 722 - connecting rod; 723 - binding belt retaining point; 7231 - fixing seat. DETAILED DESCRIPTION

[0026] Example 1: In view of the technical problem that the existing air drop platform in the background art is prone to lose the fixing point of the binding belt when landing and breaking, the present embodiment provides a pre-tightening compensation type air drop platform, which adds a mounting embedded part 40 and an external support frame 50 to avoid the direct loss of the connecting fixing point of the binding belt 20 caused by the damage of the bearing plate 10.

[0027] As shown in Figures 1 to 4 , the pre-tightening compensation type air drop platform comprises: a bearing plate 10 for directly bearing goods 01, which is in a rectangular shape and is made by a mold composed of an upper mold and a lower mold through a rotational molding process; a binding belt 20 for binding the goods 01 and fixing the goods 01 on the bearing plate 10; a net 30 covering the goods 01, which has a protective effect of forming a reliable whole and balancing the impact force of the plurality of goods 01, and cooperates with the binding belt 20; a mounting embedded part 40 and an external support frame 50, which cooperatively form the core design of the air drop platform, wherein the mounting embedded part 40, as a direct connecting component of the binding belt 20, is symmetrically embedded in the bearing plate 10, and cooperates with the external support frame 50 which has stronger rigidity, so that the binding belt 20 can avoid losing the connecting fixing point directly caused by the damage of the bearing plate 10.

[0028] Reference Figure 3 , Figure 4, specifically, the mounting embedded part 40 includes a binding strap embedded seat 41 and a support embedded seat 42, wherein the binding strap embedded seat 41 is used to connect with the binding strap 20, and the support embedded seat 42 is used to stably connect the external support frame 50 and the bearing plate 10 through connecting members such as bolts; the external support frame 50 has two groups and is symmetrically distributed at the bottom of the bearing plate 10, and the whole is arranged in a "π" shape, has four end portions each located at the edge of the bearing plate 10, and the binding strap embedded seat 41 is arranged at the four end portions; the support embedded seat 42 has a plurality of and is uniformly distributed at the remaining positions of the external support frame 50 except the end portions, so as to improve the stress uniformity of the air drop platform and ensure the stable loading of goods.

[0029] Further, as shown in Figure 3 , the binding strap embedded seat 41 at each end portion is in pairs as a group, so that the two external support frames 50 form eight groups in total, and one binding strap 20 is connected to two groups of binding strap embedded seats 41 to form double rope binding for the goods 01, so as to ensure the reliable stability of the binding.

[0030] As shown in Figure 5 , the external support frame 50 is made of aluminum alloy material and has a structure including a support base 51 and a reinforcing flange 52, which not only ensures the strength of the structure, but also reduces the overall weight. When the bearing plate 10 is damaged, the external support frame 50 can provide a stable connection and fixing point for the binding strap 20 due to its rigidity and stability, prevent the binding strap 20 from loosening, and thus ensure the safety of the goods 01 during the air drop process. The binding strap embedded seat 41 is composed of a binding strap retaining pipe 411 and a fixing flange 412, wherein the binding strap retaining pipe 411 provides a stable passage for the binding strap 20. The setting of the fixing flange 412 makes the connection between the external support frame 50 and the bearing plate 10 more firm.

[0031] Preferably, the mounting embedded part 40 is integrally formed with the bearing plate 10, and the specific preparation process is as follows: First, before the upper mold and the lower mold are closed, a special positioning pin, quick-release lock or bolt is used to stably embed the mold of the mounting embedded part 40 into the inner wall of the upper mold of the rotational molding mold.

[0032] Then, the powder raw material of the bearing plate 10 is filled into the lower mold, the upper mold and the lower mold are tightly closed, and the bolt or the quick-release lock is locked to form a closed hollow cavity.

[0033] Then, the rotational molding machine is used for rotational molding, so that the powder can be uniformly distributed and attached to every corner of the mold after melting; after the rotational molding is completed, cooling and demolding are performed, at this time, the material of the bearing plate 10 covers and tightly wraps the outside of the mounting embedded part 40, and the two are tightly connected (as shown in Figure 4 ).

[0034] Finally, install the outer support frame 50, ensure that the quality of the shaped load plate 10 meets the requirements, and then bolt the outer support frame 50 to the binding pre-embedded seat 41 and the support pre-embedded seat 42.

[0035] As shown in Figure 1 , the working principle of the above air drop platform is as follows: When installing the goods 01, place the goods 01 on the load plate 10 and cover it with the net 30, then pass the binding belt 20 through two binding pre-embedded seats 41 of one group and around the goods 01, and then connect and fix it with the binding pre-embedded seat 41 on the other side. The eight groups of binding pre-embedded seats 41 distributed in four edges can form four double-strand ropes that are crisscrossed, so as to realize firm binding of the goods 01 in the horizontal and vertical directions; in the normal state, the binding belt 20 is distributed by the symmetrical characteristic of the installation pre-embedded part 40, so that the pressure applied by the binding belt 20 to the goods 01 is uniformly distributed, ensuring reliable fixation of the goods 01.

[0036] When the load plate 10 is damaged, especially when the corners are damaged first, since the fixing point of the binding belt 20 has been transferred to the outer support frame 50, the damage will not directly cause the binding belt 20 to lose its fixing effect. At this time, the outer support frame 50 can continue to withstand the tension of the binding belt 20 due to its rigidity and structural strength of the aluminum alloy material, preventing the binding belt 20 from relaxing due to the damage of the load plate 10. The reinforcing flange 52 on the outer support frame 50 further enhances the stability of the structure, ensuring that it remains stable under complex stress conditions. At the same time, the binding belt retaining pipe 411 in the binding pre-embedded seat 41 provides a stable passage for the binding belt 20, and the fixing flange 412 ensures the firm connection between the outer support frame 50 and the load plate 10, so that even if the load plate 10 is partially damaged, the overall structural integrity of the outer support frame 50 will not be affected. This design greatly improves the reliability and safety of the air drop platform in harsh environments, effectively avoiding the risk of the goods 01 falling or scattering due to the failure of the binding system. Effectively prevent the binding belt 20 from relaxing, realize the continuous and reliable fixation of the goods 01, and thus greatly reduce the risk of the goods 01 falling.

[0037] Referring to Figure 2 , in this embodiment, a plurality of roller mounting seats 60 are also embedded in the load plate 10, which can be used to install rollers to facilitate flexible movement of the air drop platform.

[0038] Embodiment 2: Referring to Figure 1 and Figures 6 to 10The embodiment provides another pre-tightening compensation type air drop platform, by additionally arranging the pre-tightening embedded part 70, on one hand, damage of the bearing plate 10 directly causes the binding belt 20 to lose the fixed point, on the other hand, the pre-tightening embedded part 70 can release the pre-stress when the bearing plate 10 is damaged, continuously resist the tension of the binding belt 20, and prevent the binding belt 20 from relaxing.

[0039] As shown in Figure 6 and Figure 7 , the pre-tightening compensation type air drop platform comprises: The bearing plate 10 is used for directly bearing the goods 01, is in a rectangular shape, and is made by a rolling process by using a mold composed of an upper mold and a lower mold; The binding belt 20 is used for binding the goods 01, and fixes the goods 01 on the bearing plate 10; The net 30 is covered on the goods 01, has a protection effect of making the goods 01 form a reliable whole and balancing the impact force, and cooperates with the binding belt 20. The pre-tightening embedded part 70 is a core component of the air drop platform, is embedded in the bearing plate 10, comprises a central base frame 71 and pre-tightening connecting assemblies 72 vertically arranged on four edges of the central base frame 71, and the binding belt 20 is connected to the pre-tightening connecting assemblies 72, so that damage of the bearing plate 10 directly causes the binding belt 20 to lose the fixed point can be avoided.

[0040] As shown in Figure 6 and Figure 7 , specifically, the pre-tightening connecting assemblies 72 have four groups, are vertically connected to four edge frame rods 711 of the central base frame 71 respectively, and the four edge frame rods 711 are connected in a head-to-tail mode to form a rectangular frame, so that the four groups of pre-tightening connecting assemblies 72 can generate pre-tightening stress in the transverse direction and the longitudinal direction.

[0041] In order to improve the stability of the air drop platform, the stress points of the air drop platform are preferably concentrated on a main supporting component, therefore, in the air drop platform, the bearing plate 10 which plays a main supporting role and the pre-tightening embedded part 70 which bears the tension of the binding belt 20 are integrally formed, and are preferably integrally formed at one time, so as to save the production cost and improve the production efficiency.

[0042] As shown in Figure 6 , to this end, in the embodiment, the pre-tightening embedded part 70 is integrally formed with the bearing plate 10 by a rolling process in the forming process of the bearing plate 10, wherein the central base frame 71 is integrally connected with the bearing plate 10, and the pre-tightening connecting assemblies 72 are arranged in a gap with the bearing plate 10. The gap arrangement can ensure that, when the bearing plate 10 is damaged by impact and a gap is generated at the fixed position of the pre-tightening connecting assemblies 72, the pre-stress can be released, the tension of the binding belt 20 is resisted, and the binding reliability is improved.

[0043] The specific preparation process of the above-mentioned pre-tightenable embedded part 70 integrally formed with the bearing plate 10 is as follows: First, before the upper mold and the lower mold are closed, the pre-tightenable embedded part 70 is precisely fixed on the inner wall of the upper mold using special positioning pins, quick-release locks or bolts. The upper mold cavity has a blocking piece that blocks the pre-tightening connecting assembly 72 from the inner wall of the upper mold. The blocking piece presses the arc-shaped stress plate 721, causing it to deform and store prestress; Then, the powder raw material of the bearing plate 10 is filled into the lower mold, and the upper mold is tightly closed and locked with bolts or quick-release locks, forming a closed hollow cavity. Then, the rolling plastic machine is used for rolling plastic forming, so that the powder of the bearing plate 10 can be uniformly distributed and attached to every corner of the mold, including the pre-tightenable embedded part 70 above. After rolling plastic forming, the material of the bearing plate 10 covers and tightly wraps the central base frame 71 and the binding tethering point 723, locking the prestress stored in the arc-shaped stress plate 721.

[0044] As shown in Figure 8 Preferably, the pre-tightening connecting assembly 72 comprises: The arc-shaped stress plate 721 is connected to the frame rod 711 at one end and has an upward arch shape in a natural state, has a certain elasticity, and is pressed by the blocking piece to store prestress during rolling plastic forming; The connecting rod 722 is connected to the other end of the arc-shaped stress plate 721, which on the one hand ensures the stable connection of the arc-shaped stress plate 721 and makes the pre-tightening connecting assembly 72 complete in structure, and on the other hand serves as a mounting base for other components; The binding tethering point 723 is provided on the connecting rod 722 and is used to connect and fix the binding belt 20. The upper end is fixedly connected to the bearing plate 10, and the side wall is connected to the arc-shaped stress plate 721. The direction of the thrust generated by the arc-shaped stress plate 721 is opposite to the direction of the tension generated by the binding belt 20.

[0045] As shown in Figure 7 The working principle of the pre-tightenable embedded part 70 is as follows: When installing the goods 01, the goods 01 are placed on the bearing plate 10 and covered with the net 30, then the binding belt 20 is threaded through one set of pre-tightening connecting assemblies 72, then passed over the goods 01, and finally threaded through the opposite pre-tightening connecting assembly 72 on the other side. The other two sets of pre-tightening connecting assemblies 72 also adopt the above-mentioned operation, which can achieve firm binding of the goods 01 in the transverse and longitudinal directions. In the normal state, the wrapping and tightening force of the bearing plate 10 on the central base frame 71 locks the prestress in the arc-shaped stress plate 721, and the tensioning force of the binding belt 20 acts on the arc-shaped stress plate 721 through the binding tethering point 723, ensuring reliable fixation of the goods 01; In normal state, the prestress stored in the arc-shaped stress plate 721 is locked by the wrapping force of the bearing plate 10; when the air-drop platform is unstable and broken, the breakage usually starts from the bearing plate 10, especially the corners thereof, and extends to the middle part of the bearing plate 10 with thinner wall; since the pre-tightening connecting assembly 72 is connected into an integral structure through the central base frame 71, it will not fail immediately due to the local breakage of the bearing plate 10; when the wrapping force of the bearing plate 10 on the central base frame 71 is weakened or disappeared due to the breakage caused by impact, the arc-shaped stress plate 721 releases the prestress stored therein and generates a restoring force pushing outward, which counteracts the tension of the binding belt 20, effectively prevents the binding belt 20 from loosening, realizes the continuous and reliable fixing of the goods 01, and greatly reduces the risk of falling of the goods 01.

[0046] As shown in Figure 8 , in this embodiment, in order to further strengthen the stable binding of the goods 01, two arc-shaped stress plates 721 are arranged in each pre-tightening connecting assembly 72, and two groups of binding tethering points 723 are arranged at the two ends of the connecting rod 722, respectively.

[0047] As shown in Figure 8 , further, the arc-shaped stress plate 721 is arranged in one-to-one correspondence with the binding tethering point 723, wherein each group of binding tethering points 723 is composed of two fixed seats 7231, and the arc-shaped stress plate 721 is located between the two fixed seats 7231. This structure ensures that the tension of the binding belt 20 acting on the fixed seat 7231 can be effectively and directly transmitted to the arc-shaped stress plate 721, avoiding unnecessary deformation of other parts.

[0048] As shown in Figure 10 , in order to further ensure that the arc-shaped stress plate 721 and the binding belt 20 apply force to the fixed seat 7231 in opposite directions, the fixed seat 7231 is arranged slightly inclined, the inclination direction is that the upper end is outward and the bottom end is inward, and the connection part of the arc-shaped stress plate 721 and the fixed seat 7231 is closer to the upper end of the fixed seat 7231, and the binding belt 20 is connected in a U-shaped manner by passing through the two fixed seats 7231 in sequence, so that the outward pushing force of the arc-shaped stress plate 721 on the fixed seat 7231 can be located in the middle part of the binding belt 20, and can counteract the tension of the binding belt 20.

[0049] As shown in Figure 9 and Figure 10As shown, preferably, the lower end of the arc-shaped stress plate 721 is further provided with a limiting plate 7211, which is movably embedded in a movable slot (not shown in the figure) in the lower inner wall of the bearing plate 10, and in the normal state, the limiting plate 7211 is spaced apart from the top wall of the movable slot and the two inner walls in the direction of deformation of the arc-shaped stress plate 721, and the spacing can be set according to the maximum deformation degree of the arc-shaped stress plate 721. In order to adapt to the arc shape of the arc-shaped stress plate 721, the bearing plate 10 can be upwardly convexly arranged below the arc-shaped stress plate 721, and the movable slot is arranged at the upwardly convex position.

[0050] The provision of the limiting plate 7211 allows the deformation of the arc-shaped stress plate 721 to be limited within a certain range, so that when the edge of the bearing plate 10 is damaged too severely to cause the binding band retaining point 723 to be damaged, the tension of the binding band 20 is prevented from instantaneously increasing to straighten the arc-shaped stress plate 721, causing the arc-shaped stress plate 721 to completely release the prestress and lose the ability to resist the binding band 20.

[0051] As shown in Figure 6 and Figure 8 In this embodiment, a plurality of roller mounting seats 60 are further embedded in the bearing plate 10, which can be used to install rollers to facilitate flexible movement of the air-drop platform, and four roller mounting seats 60 are respectively connected to the four edge frame rods 711 of the central base frame 71.

[0052] As shown in Figures 6 to 8 In addition, the two pairs of opposite pre-tightening connecting assemblies 72 are symmetrically arranged, and the two groups of pre-tightening connecting assemblies 72 perpendicular to each other can be adjusted in size according to specific conditions, such as the length of the connecting rod 722, the spacing between the two arc-shaped stress plates 721, and the spacing between the two fixed seats 7231.

[0053] The above description is only one specific example of the present application and does not constitute any limitation on the present application. Obviously, for those skilled in the art, after understanding the content and principles of the present application, various modifications and changes in form and details can be made without departing from the principles and structures of the present application, but these modifications and changes based on the idea of the present application are still within the protection scope of the claims of the present application.

Claims

1. A pre-tensioned compensation type air drop platform, characterized by, The application relates to a load-bearing plate (10) for carrying goods (01), a binding belt (20) for fixing the goods (01) on the load-bearing plate (10), a mounting embedded part (40) symmetrically embedded in the load-bearing plate (10) as a connecting component of the binding belt (20), and an outer supporting frame (50) arranged at the bottom of the load-bearing plate (10) and connected with the load-bearing plate (10) through the mounting embedded part (40). The mounting embedded part (40) comprises a binding belt embedded seat (41) and a supporting frame embedded seat (42), the binding belt embedded seat (41) is used for connecting with the binding belt (20), and the supporting frame embedded seat (42) is used for connecting the outer supporting frame (50) with the load-bearing plate (10). The outer supporting frame (50) has two groups of and symmetrically distributed supporting frames at the bottom of the load-bearing plate (10), the outer supporting frame (50) has a whole "pi" shape, four end portions are located at the edges of the load-bearing plate (10), the binding belt embedded seats (41) are arranged at the four end portions, and the supporting frame embedded seat (42) has a plurality of and uniformly distributed supporting frame embedded seats at the positions of the outer supporting frame (50) except the end portions. The binding belt embedded seat (41) comprises a binding belt retaining pipe (411) and a fixing flange (412), the binding belt retaining pipe (411) is used for penetrating the binding belt (20), and the fixing flange (412) is used for connecting with the outer supporting frame (50). The outer supporting frame (50) comprises a supporting base frame (51) and a reinforcing flange (52), and the outer supporting frame (50) is made of an aluminum alloy material. The application relates to a load-bearing plate (10) for carrying goods (01), a binding belt (20) for fixing the goods (01) on the load-bearing plate (10), a pre-tightening embedded part (70) embedded in the load-bearing plate (10) and comprising a center base frame (71) and a pre-tightening connecting assembly (72) arranged on the center base frame (71), and the binding belt (20) is connected with the pre-tightening connecting assembly (72).

2. The pre-tension compensated aerial delivery platform of claim 1, wherein, The center base frame (71) is integrally connected with the load-bearing plate (10), the pre-tightening connecting assembly (72) is arranged in a gap mode with the load-bearing plate (10), the pre-tightening connecting assembly (72) comprises an elastic stress part and a binding belt retaining point (723), one end of the elastic stress part is connected with the center base frame (71), the other end of the elastic stress part is connected with the binding belt retaining point (723), the binding belt (20) is connected with the binding belt retaining point (723), and the elastic stress part stores a pre-stress.

3. The pre-tension compensated aerial delivery platform of claim 2, wherein, ​ 4. The pre-tension compensated aerial delivery platform according to claim 2 or 3, characterized in that ​ 5. The pre-tension compensated aerial delivery platform of claim 1, wherein, ​ 6. A pre-tensioned compensation type air drop platform, characterized by, ​ ​ ​ ​ ​ 7. The pre-tension compensated aerial delivery platform of claim 6, wherein, The pushing force direction of the elastic stress element to the binding harness anchorage point (723) is opposite to the pulling force direction of the binding harness (20) to the binding harness anchorage point (723).

8. The pre-tension compensated aerial delivery platform of claim 7, wherein, The elastic stress element is an arc-shaped stress plate (721) which is in an upwardly arched shape in a natural state.

9. The pre-tension compensated aerial delivery platform of claim 6, wherein, The central base frame (71) comprises four edge frame rods (711) connected head to tail to form a rectangular frame; the pre-tightening connecting assembly (72) has four groups which are vertically connected to the four edge frame rods (711) respectively.

10. The pre-tension compensated aerial delivery platform of claim 9, wherein, The pre-tightening connecting assemblies (72) opposite to each other are symmetrically arranged.

11. A method of forming a pre-tension compensated aerial delivery platform according to any one of claims 6 to 10, characterised in that, The method comprises the following steps: S1, pre-embedded part positioning: fixing the pre-tightening pre-embedded part (70) to the inner wall of the upper mold of the rotational molding mold, and using a barrier sheet to isolate the pre-tightening connecting assembly (72) from the inner wall of the upper mold, the barrier sheet compresses the elastic stress element to make it generate deformation and store pre-stress; S2, mold closing: filling the powder raw material of the bearing plate (10) into the lower mold, closing and locking the upper mold and the lower mold to form a closed hollow cavity; S3, rotational molding: heating the mold by rotational molding to make the powder raw material melt and uniformly distribute on the inner wall of the mold, coat the central base frame (71) and the binding harness anchorage point (723), and lock the pre-stress stored in the elastic stress element at the same time; S4, demolding: after cooling, opening the mold to take out the formed pre-tightening compensation type air-drop platform, a gap is formed between the pre-tightening connecting assembly (72) and the bearing plate (10).

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