Heavy loading gravity air-drop device

Abstract

The invention relates to a reloading gravity air-drop device which comprises a forward limiting structure, a side face guide structure, a bottom face guide structure and a mooring release device, the bottom face guide structure comprises two sets of ground rail assemblies, and each set of ground rail assembly at least comprises a row of multiple rolling units arranged in the air-drop direction. The side face guiding structure comprises two side face guiding assemblies, and each side face guiding assembly comprises a plurality of side face guiding units which are sequentially arranged in the air-drop direction. The side guide unit comprises a side guide rail, a plurality of transverse structural members and a plurality of guide wheel boxes; the forward limiting structure is a frame structure with the top inclining towards one side of the air-drop direction. According to the air-drop device, the air-drop requirement of heavy goods and materials with ultra-large weight and size can be met, the dropped goods can be stably released in the air-drop process, and the strength and the service life of the air-drop device are enough for supporting long-term air-drop of the heavy goods and materials.

Description

Technical Field

[0001] The present invention relates to the field of aviation airdrop equipment, and more particularly to a heavy-duty gravity airdrop device. Background Art

[0002] Heavy-duty airdrop is widely used in the delivery of air-transported materials. The specific process includes: after the airdrop command is issued, a tow parachute (pilot chute) is thrown out. The tow parachute unfolds in the air and applies a force in the reverse course direction to the dropped object, pulling the dropped object away from the cargo hold in the reverse course. With the increase in the carrying capacity of the aircraft and the increase in the demand for material replenishment, the requirements for the weight and volume of a single dropped object are also increasing. In addition, the existing form of tow parachute airdrop needs to develop different tow parachutes for different airdrop heights, with high R & D costs and unable to meet different airdrop needs in a timely manner. To address the above problems, there is an urgent need for a general-purpose airdrop device with a simple structure, high reliability, and a wide applicable height range that can meet the airdrop needs of the above-mentioned dropped objects. Summary of the Invention

[0003] The purpose of the present invention is to provide a heavy-duty gravity airdrop device to meet the airdrop needs of heavy-duty materials with ultra-large weight and volume, so that when airdropping, the dropped object can be smoothly released, the strength and service life of the airdrop device are sufficient to support the long-term airdrop of heavy-duty materials, and the structure of the airdrop device is simple and adaptable to airdrop requirements in different height ranges.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A heavy-duty gravity airdrop device, characterized in that it includes a forward limiting structure, a side guiding structure, a bottom guiding structure, and a mooring release device. The bottom guiding structure includes two groups of ground rail assemblies, and each group of ground rail assemblies includes at least one row of a plurality of rolling units arranged along the airdrop direction. The adjacent rolling units in the airdrop direction are spaced apart, and the rolling units are fixed on the cabin floor; the side guiding structure includes two groups of side guiding assemblies, and each group of side guiding assemblies is respectively arranged outside the two groups of ground rail assemblies. Each group of side guiding assemblies includes a plurality of side guiding units arranged in sequence along the airdrop direction; the side guiding unit includes a side guide rail, a plurality of transverse structural members, and a plurality of guide wheel boxes. At least one side of the left and right ends of the transverse structural member is bolted to the side guide rail through a steel angle box, so that the transverse structural member is perpendicular to the side guide rail.

[0006] The transverse structural members are arranged within the intervals between the rolling units. Each transverse structural member is fixed to the cabin floor by anchor bolts. During installation, the height of the transverse structural member is lower than the highest point of the rolling unit. The guide wheel box includes a box-shaped frame, vertical rollers, and vertical axles. The vertical rollers are supported within the box-shaped frame by the vertical axles. During installation, the cylindrical surface of the vertical roller protrudes from the box-shaped frame for contact guiding with the side surface of the dropped object. The box-shaped frame is fixed to the top of the side guide rail by bolts.

[0007] The forward limiting structure is fixed to the floor at the end position of the ground rail assembly opposite to the airdrop direction by bolts. The forward limiting structure is a frame structure with the top inclined towards the airdrop direction. The frame structure is composed of angle steels with an "L"-shaped cross-section. On the side of the frame structure facing the dropped object, an arc-shaped steel plate is provided. The shape of the arc-shaped steel plate matches the outer contour of the part where the dropped object contacts the frame structure. The height of the frame structure is greater than 1 / 2 of the height of the dropped object.

[0008] The mooring release device includes a mooring release belt, side mooring fixing belts, adjusting tightening belts, lifting rings, and pin-pulling ropes.

[0009] Further, the side guide rail is an "I"-shaped steel piece. The cross-section of the transverse structural member is a "□" shape. One side of the steel angle box is attached to the web of the side guide rail and fixed to the web by bolts. The other perpendicular side is attached to the side surface of the transverse structural member and also fixed to the side surface of the transverse structural member by bolts.

[0010] Further, the rolling unit includes a rolling base and multiple rollers. The multiple rollers are supported on the rolling base by rolling axles.

[0011] Further, inverted "L"-shaped limit blocks are fixedly arranged on both sides of the dropped object. One side of the limit block is fixedly connected to the bottom of the dropped object. When the dropped object is fixed inside the cabin or translated along the side guide rail, the other end of the limit block is located within the abdominal cavity of the "I"-shaped side guide rail, so that the limit block realizes vertical limitation of the dropped object. When the dropped object is translated on the inclined platform, the other side of the limit block is not located within the abdominal cavity of the "I"-shaped side guide rail, so that the dropped object is not restricted by the "I"-shaped side guide rail during the dropping process.

[0012] Further, the vertical height of the steel angle box is greater than the vertical height of the transverse structural member.

[0013] Further, a notch for the dropped object to pass through is provided on the side of the steel angle box facing the dropped object.

[0014] Furthermore, the mooring release belt consists of a middle ring, a small ring, and a connecting belt; the side mooring fixing belt consists of a large ring and a connecting belt; the adjustment tightening belt consists of a tightener and a webbing; the pin pulling rope consists of a pin and a connecting belt, which is used to release the three-ring connection.

[0015] Furthermore, the transverse structural member and the steel corner box are both made of Q345 steel.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] 1. The heavy-duty gravity airdrop device of the present invention can achieve stable airdrop of objects of super-large weight and volume. The weight of the objects can reach 10 tons, which can meet the increasingly high airdrop needs of today.

[0018] 2. The forward limiting structure and mooring release device can achieve fixed limiting of the projectile before airdrop. The height of the frame structure of the forward limiting structure is specifically designed to be greater than 1 / 2 of the height of the projectile to prevent oversized projectiles from tipping over. At the same time, the top outer contour of the frame structure in contact with the projectile matches the projectile to enhance the limiting effect. In addition, when the projectile is subjected to lateral overturning force during transportation, the support and limiting of the frame structure can reduce the vertical limiting pressure of the limit block and side guide rail, thereby increasing the service life of the limit block and side guide rail.

[0019] 3. Utilizing the original aircraft's slide rails, the side rails are secured via transverse structural members, avoiding the need for drilling holes in the aircraft floor and damaging the floor structure. Furthermore, due to the thickness of the I-beam side rails, drilling holes is difficult. The transverse structural member design eliminates the need for fixing holes in the I-beam bottom, making side rail installation easier. Furthermore, since drilling holes in the side rail bottom significantly reduces its strength, the transverse structural member prevents this drawback.

[0020] 4. The airdrop device of the present invention can simultaneously guide the bottom and sides of the object when it is moving, and the limit blocks and side guide rails cooperate to vertically limit the object, preventing the object from tipping over during movement, thereby improving the stability of the object during delivery. When on the cargo bridge, no mechanism for vertically limiting the limit blocks is provided, thereby forming a smooth exit channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0022] Figure 1 It is a schematic diagram of the overall structure of the heavy-duty gravity airdrop device according to the present invention;

[0023] Figure 2 Schematic diagram of the side guiding structure and the ground rail assembly according to the present invention;

[0024] Figure 3-1 Installation schematic diagram of the limiting member located in the cabin according to the present invention (the guide wheel box is not shown);

[0025] Figure 3-2 Installation schematic diagram of the limiting member located on the inclined platform according to the present invention;

[0026] Figure 4 Schematic diagram of the forward limiting structure according to the present invention;

[0027] Figure 5 Schematic diagram of the three-ring connection structure according to the present invention. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the embodiments and the accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0029] As Figure 1-4 shown, the present invention provides a heavy-load gravity airdrop device, including a forward limiting structure 1, a side guiding structure 2, a bottom guiding structure 3 and a mooring release device 4. The bottom guiding structure 3 includes two groups of ground rail assemblies. Each group of ground rail assemblies includes at least one row of a plurality of rolling units arranged along the airdrop direction, and adjacent rolling units in the airdrop direction are spaced apart; the rolling unit includes a rolling base 5 and a plurality of rollers 6, and the plurality of rollers 6 are supported on the rolling base 5 through rolling shafts; the rolling unit is fixed on the cabin floor 7, and the rolling unit provides rolling guidance for the bottom surface of the dropped object 11 along the dropping direction.

[0030] The side guiding structure 2 includes two groups of side guiding components. Each group of side guiding components is respectively arranged outside the two groups of ground rail components. Each group of side guiding components includes a plurality of side guiding units arranged in sequence along the airdrop direction. The side guiding unit includes a side guide rail 8, a plurality of transverse structural members 9, and a plurality of guide wheel boxes 10. The side guide rail 8 is an "I"-shaped steel member, and the web is strengthened by reinforcing ribs. The transverse structural member 9 is a Q345 steel member, and the cross-section is a "□" shape. At least one of the left and right sides of the end of the transverse structural member 9 is bolted to the side guide rail 8 through a Q345 steel angle box 16, so that the transverse structural member 9 is perpendicular to the side guide rail 8. Specifically, one side of the steel angle box 16 is attached to the web of the side guide rail 8 and fixed by bolts, and the other perpendicular side is attached to the side of the transverse structural member 9 and also fixed by bolts. The guide wheel box 10 includes a box-shaped frame 101, a vertical roller 102, and a vertical roller shaft 103. The vertical roller 102 is supported in the box-shaped frame 101 through the vertical roller shaft 103. During installation, the cylindrical surface of the vertical roller 102 protrudes from the box-shaped frame 101 for contact guiding with the side of the dropped object 11, so that the vertical roller 102 can provide a side guiding effect when the dropped object 11 moves translationally. Further, the box-shaped frame 101 is bolted to the top of the side guide rail 8. The transverse structural member 9 is arranged within the interval between two adjacent rolling units of the ground rail component. Each transverse structural member 9 is fixed to the cabin floor by anchor bolts. During installation, the height of the transverse structural member 9 is lower than the highest point of the roller 6 of the rolling unit, so that when the dropped object 11 moves, the height of the transverse structural member 9 will not protrude beyond the roller 6 of the rolling unit to form an obstacle to the movement of the dropped object 11. When the dropped object 11 moves, the side guiding component provides side guiding for the translation of the dropped object 11. It should be noted that by providing the transverse structural member 9, the side guide rail 8 of the present invention only contacts the floor and does not need to be fixed to the ground by means of bolts or the like, avoiding opening holes at the bottom of the "I"-shaped steel side guide rail 8, facilitating installation, and also not needing to open holes in the aircraft floor to damage the original aircraft floor structure and not affecting the strength of the side guide rail 8.

[0031] In an alternative embodiment, inverted "L"-shaped limit blocks 12 are fixedly arranged on both sides of the dropped object 11. One side of the limit block 12 is fixedly connected to the bottom of the dropped object 11. When the dropped object is fixed inside the cabin or translates along the side guide rail 8, the other end of the limit block 12 is located inside the abdominal cavity of the "I"-shaped side guide rail 8, so that the limit block 12 realizes vertical limit for the dropped object 11. And when the dropped object translates on the inclined platform, such as Figure 3-2As shown, the other side of the limit block 12 is not located inside the abdominal cavity of the "I"-shaped side guide rail 8, so that the dropped object is not restricted by the "I"-shaped side guide rail 8 when being dropped; the above-mentioned inclined platform is a part of the floor at the rear of the cabin, and rotates around a rotating shaft at one end during an airdrop to open an airdrop opening in the cabin. Further, to ensure the connection strength between the transverse structural member 9 and the side guide rail 8, the vertical height of the steel angle box 16 is greater than the vertical height of the transverse structural member 9. At this time, to avoid interference and obstruction of the dropped object 11 during movement by the steel angle box 16, a notch 13 for the dropped object 11 to pass through is provided on the side of the steel angle box 16 facing the dropped object 11.

[0032] The forward limiting structure 1 is fixed to the floor at the end of the ground rail assembly opposite to the airdrop direction by bolts. The forward limiting structure 1 is a frame structure with the top inclined towards the airdrop direction. The frame structure is composed of angle steels with an "L"-shaped cross-section. A reinforcing bar 14 is provided on the top of the frame structure for strengthening the strength of the frame structure. An arc-shaped steel plate 15 is provided on the side of the top of the frame structure facing the dropped object 11. The shape of the arc-shaped steel plate 15 matches the outer contour of the part where the dropped object 11 contacts the frame structure, so that the dropped object 11 can be stably limited by the frame structure before airdrop release; further, due to the large weight, volume and high center of gravity of the dropped object 11, it is easy to roll over during the flight of the aircraft. Based on this, the height of the frame structure of the present invention is designed to be greater than 1 / 2 of the height of the dropped object 11, so that the dropped object 11 can be limited and supported by the frame structure during transportation to prevent it from rolling over; at the same time, due to the contact and support between the frame structure and the dropped object 11, the side turning force from the limit block 12 received by the side guide rail 8 during transportation can be reduced, thereby improving the fatigue life of the side guide rail 8 and enabling the side guiding structure 2 to operate stably.

[0033] The mooring release device 4 includes a mooring release belt, a side mooring fixing belt, an adjusting tightening belt, a lifting ring and a pin pulling rope, and adopts a three-ring structure to realize the limiting and release of the dropped object 11 after the mooring chain is released. The mooring release belt is composed of a middle ring 41, a small ring 42 and a connecting belt 43, and is used to fix the dropped object 11. The length of the connecting belt is greater than 5m, and the material is a double-layer 48-9000 coated aramid III belt; the side mooring fixing belt is composed of a large ring 44 and a connecting belt, and the length of the connecting belt is about 5m, and the material is a double-layer 48-9000 coated aramid III belt; the adjusting tightening belt is composed of a tightening device and a webbing. One end is connected to the mooring ring on the aircraft floor through a lifting ring, and the other end is connected to the side mooring fixing belt through the tightening device to realize the length adjustment of the mooring release device 4. The material is a double-layer 48-9000 coated aramid III belt; the pin pulling rope is composed of a pin and a connecting belt, and is used to release the three-ring connection; the three-ring connection structure is as Figure 5As shown, the working principle and process of the mooring release device 4 and the release principle of the three-ring connection structure belong to the prior art and will not be elaborated here.

[0034] For the sake of easy understanding, the working principle and process of the above-mentioned reloadable gravity airdrop device will be specifically described and explained as follows:

[0035] Before the airdrop, the payload 11 is located at one end of the ground track assembly. The payload 11 is limited and supported by the forward limiting structure 1, and is fixedly positioned through the mooring chain and the mooring release device 4. When the airdrop command is received, the mooring chain is released, the cargo hatch is opened, the aircraft maintains stable flight at a predetermined elevation angle, and the airdrop personnel synchronously release the left and right mooring release devices 4. The payload 11 moves along the ground track assembly. The vertical rollers 102 of the side guiding structure 2 conduct lateral guidance on the payload 11, and at the same time, the limiting block 12 conducts vertical limitation on the payload 11, so that the payload 11 can move smoothly to the tail of the cargo bridge. During this process, the payload 11 accelerates away from the aircraft under the action of gravity. After the payload leaves the aircraft, the hatch is closed to complete the entire airdrop process.

[0036] The above-mentioned specific implementation manners have further elaborated in detail the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above are only specific implementation manners of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heavy-duty gravity airdrop device, characterized in that: It includes a forward limiting structure (1), a side guiding structure (2), a bottom guiding structure (3) and a mooring release device (4). The bottom guiding structure (3) includes two groups of ground rail assemblies. Each group of ground rail assemblies includes at least one row of a plurality of rolling units arranged along the airdrop direction. The adjacent rolling units in the airdrop direction are spaced apart, and the rolling units are fixed on the cabin floor; the side guiding structure (2) includes two groups of side guiding assemblies. Each group of side guiding assemblies is respectively arranged outside the two groups of ground rail assemblies. Each group of side guiding assemblies includes a plurality of side guiding units arranged in sequence along the airdrop direction; the side guiding unit includes a side guide rail (8), a plurality of transverse structural members (9) and a plurality of guide wheel boxes (10). At least one side of the left and right ends of the end of the transverse structural member (9) is bolted to the side guide rail (8) through a steel angle box (16), so that the transverse structural member (9) is perpendicular to the side guide rail (8); The transverse structural member (9) is arranged in the interval between the rolling units. Each transverse structural member (9) is fixed to the cabin floor through anchor bolts. During installation, the height of the transverse structural member (9) is lower than the highest point of the rolling unit; the guide wheel box (10) includes a box-shaped frame (101), a vertical roller (102) and a vertical roller shaft (103). The vertical roller (102) is supported in the box-shaped frame (101) through the vertical roller shaft (103). During installation, the cylindrical surface of the vertical roller (102) protrudes from the box-shaped frame (101) for contact guiding with the side surface of the dropped object (11), and the box-shaped frame (101) is fixed to the top of the side guide rail (8) through bolts; The forward limiting structure (1) is fixed to the floor at the end position of the ground rail assembly opposite to the airdrop direction through bolts. The forward limiting structure (1) is a frame structure with the top inclined towards the airdrop direction. The frame structure is composed of angle steel with an "L" cross-section. An arc-shaped steel plate (15) is arranged on the side of the frame structure facing the dropped object (11). The shape of the arc-shaped steel plate (15) matches the outer contour of the part where the dropped object (11) contacts the frame structure; the height of the frame structure is greater than 1 / 2 of the height of the dropped object (11); The mooring release device (4) includes a mooring release belt, a side mooring fixing belt, an adjusting tightening belt, a lifting ring and a pull pin rope.

2. The heavy-load gravity airdrop device according to claim 1, characterized in that: The side guide rail (8) is an "I"-shaped steel piece. The cross-section of the transverse structural member (9) is a "□" shape. One side of the steel angle box (16) is attached to the web of the side guide rail (8) and is fixed to the web by bolts. The other perpendicular side is attached to the side surface of the transverse structural member (9) and is also fixed to the side surface of the transverse structural member (9) by bolts.

3. The heavy-load gravity airdrop device according to claim 1, characterized in that: The rolling unit includes a rolling base (5) and a plurality of rollers (6). The plurality of rollers (6) are supported on the rolling base (5) through rolling shafts.

4. The heavy-duty gravity airdrop device according to claim 1, wherein: Inverted "L"-shaped limit blocks (12) are fixedly arranged on both sides of the delivery object (11). One side of the limit block (12) is fixedly connected to the bottom of the delivery object (11). When the delivery object (11) is fixed inside the cabin or translated along the side guide rail (8), the other end of the limit block (12) is located inside the abdominal cavity of the "I"-shaped side guide rail (8), so that the limit block (12) realizes the vertical limit of the delivery object (11); when the delivery object is translated on the inclined platform, the other side of the limit block (12) is not located inside the abdominal cavity of the "I"-shaped side guide rail (8), so that the delivery object is not restricted by the "I"-shaped side guide rail (8) during the delivery process.

5. The heavy-duty gravity airdrop device according to claim 4, wherein: The vertical height of the steel angle box (16) is greater than the vertical height of the transverse structural member (9).

6. The heavy-load gravity airdrop device according to claim 4, characterized in that: The steel angle box (16) is provided with a notch (13) for the delivery object (11) to pass through on the side facing the delivery object (11).

7. The reloadable gravity airdrop device according to claim 1, wherein: The mooring release belt is composed of a middle ring (41), a small ring (42), and a connecting belt (43); the side mooring fixing belt is composed of a large ring (44) and a connecting belt; the adjusting tightening belt is composed of a tightening device and a webbing; the pin-pulling rope is composed of a pin and a connecting belt and is used to release the three-ring connection.

8. The heavy-duty gravity airdrop device according to claim 1, characterized in that: The materials of the transverse structural member (9) and the steel angle box (16) are both Q345 steel.

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