Search

CN-116238692-B - Ultra-low-altitude parachute-free air drop device

CN116238692BCN 116238692 BCN116238692 BCN 116238692BCN-116238692-B

Abstract

The invention provides an ultra-low-altitude parachute-free air drop device which comprises a platform, support arms and foot pads, wherein the platform is connected with the support arms through hinges, support arm driving mechanisms and support arm unfolding locking mechanisms are arranged at the joint of the platform and the support arms, the support arms are composed of three energy absorption modules, the energy absorption modules are connected through hinge joints and are mutually overlapped in parallel, joint driving mechanisms and joint unfolding locking mechanisms are arranged at the joint, and the support arms are connected with movable rod pieces of the hinges and can move along the rotation direction of the hinges after electromagnetic locks are unlocked. The ultra-low-altitude parachute-free air drop device has the advantages of light overall structure, small density, high strength and convenient carrying of the used carbon fiber materials, small density and large specific energy absorption of the used aluminum honeycomb energy absorption materials, and better buffering performance compared with most of the existing energy absorption materials, can effectively absorb the impact of air drop of heavy equipment, and meets the parachute-free air drop requirement of heavy equipment and the like with higher structural integrity requirements.

Inventors

  • SONG XIAOKE
  • XU CHAOLIN
  • ZHAO YING
  • ZHANG RUIZHEN
  • GUO BEI

Assignees

  • 华东交通大学

Dates

Publication Date
20260508
Application Date
20230328

Claims (10)

  1. 1. The ultra-low-altitude parachute-free air drop device is characterized in that the platform (1) is connected with four support arms (A) through rotary hinges, a support arm driving mechanism and a support arm unfolding locking mechanism are arranged at the joint of the platform (1) and each support arm (A), the support arm (A) is composed of three energy absorption modules (B), an energy absorption module driving mechanism and an energy absorption module unfolding locking mechanism are arranged at the joint of the energy absorption modules (B), the support arm (A) is connected with the foot pad (H) through spherical hinges, the support arm (A) is folded up before use, each energy absorption module (B) is folded together to form a rectangular body with smaller length, the placement direction of the rectangular body is consistent with the length direction of the platform (1), the support arm (A) and the energy absorption modules (B) are locked through locks (T), the energy absorption body formed by folding the energy absorption modules (B) forms a certain angle with an interface (11), and the electromagnetic modules (T) are unlocked when dropped, and the electromagnetic modules (A) are unfolded to form a certain angle with the electromagnetic modules (1) to incline downwards; The support arm driving mechanism comprises a first sliding block (2), a first connecting rod (3), a first crank (4), a large gear shaft (5), a first large gear (6), a first pinion shaft (7) and a first pinion (8), wherein two ends of the first sliding block (2) are respectively connected with the platform (1) through a first cylindrical helical compression spring and a first cylindrical helical extension spring, one end of the first connecting rod (3) is connected with the first sliding block (2) through a revolute pair, the other end of the first connecting rod is connected with the first crank (4) through a revolute pair, one end of the first crank (4) is connected with the first connecting rod (3) through a revolute pair, the other end of the first crank is fixedly connected with the large gear shaft (5), one end of the large gear shaft (5) is connected with the platform (1) through a revolute pair, the other end of the large gear shaft (5) is fixedly connected with the first large gear (6), the first pinion (8) is meshed with the first large gear (6), and one end of the first pinion shaft (7) is fixedly connected with the first pinion (8), and the other end of the first pinion is connected with the platform (1) through a revolute pair. The support arm expansion locking mechanism comprises an interface (11), a first pinion shaft (7), an unlocking pin (12), a fixing pin (13), a side cover plate (14), a rear cover plate (15) and a revolute pair outer ear (16), the hinge end of the interface (11) is fixedly connected with the first pinion shaft (7), the plane end of the interface (11) is fixedly connected with a lower platform of the one-dimensional expansion mechanism (9), a first cylindrical helical compression spring is arranged between the unlocking pin (12) and the rear cover plate (15), the rear cover plate (15) is connected with the revolute pair outer ear (16) through a screw, the fixing pin (13) is connected with the unlocking pin (12) through a chute, a first cylindrical helical compression spring is arranged between the fixing pin (13) and the inner cavity of the revolute pair outer ear (16), and the side cover plate (14) is connected with the revolute pair outer ear (16) through a screw.
  2. 2. The ultra-low altitude parachute-free air drop device of claim 1, wherein the energy absorption module unfolding locking mechanism comprises a boss (17), a lock tongue (D), a cover plate (18), a concave table (19) and a hinge (E), a first cylindrical helical compression spring is arranged between the lock tongue (D) and the boss (17), the cover plate (18) is connected with the boss (17) through a screw, and the boss (17) is connected with the concave table (19) through the hinge (E).
  3. 3. The ultra-low altitude parachute-free air drop device is characterized in that the boss (17) is provided with a limiting groove (F) for limiting a lock tongue (D), and three sides of the concave table (19) are provided with square holes (G) for being matched with the lock tongue (D) to realize joint locking.
  4. 4. The ultra-low altitude parachute-free air drop device of claim 1, wherein the energy-absorbing module driving mechanism comprises a second sliding block (20), a second connecting rod (21), a second crank (22), a second large gear shaft (23), a second large gear (24), a second small gear (25) and a second small gear shaft (26), two ends of the second sliding block (20) are respectively connected with a boss (17) of the energy-absorbing module unfolding locking mechanism through a first cylindrical helical compression spring and a first cylindrical helical extension spring, one end of the second connecting rod (21) is connected with the second sliding block (20) through a revolute pair, the other end of the second connecting rod is connected with the second crank (22) through a revolute pair, one end of the second crank (22) is connected with the second connecting rod (21) through the revolute pair, the other end of the second crank is fixed with the second large gear shaft (23), one end of the second large gear shaft (23) is connected with a boss (17) of the energy-absorbing module unfolding locking mechanism through a revolute pair, the other end of the second small gear shaft (24) is fixedly connected with the second large gear shaft (24), and one end of the second small gear shaft (25) is fixedly meshed with the second small gear (26) in the second unfolding mechanism.
  5. 5. The ultra-low altitude parachute-free air drop device of claim 1, wherein the energy absorbing module (B) comprises a one-dimensional unfolding mechanism (9) and an energy absorbing material (10), the energy absorbing material (10) and the one-dimensional unfolding mechanism (9) are combined together, the energy absorbing material (10) is positioned in the one-dimensional unfolding mechanism and synchronously deforms during collision, and the movements of the energy absorbing material (10) and the one-dimensional unfolding mechanism (9) do not interfere with each other.
  6. 6. The ultra-low-altitude parachute-free air drop device of claim 5, wherein the one-dimensional unfolding mechanism (9) comprises a lower platform (901), a middle platform (902), an upper platform (903) and a branched chain (C), the three platforms are mutually parallel, the branched chain (C) comprises a branched chain lower rod (904) and a branched chain upper rod (905), rotating pairs are arranged at two ends of the branched chain rods, and the branched chain rods and the platforms are connected through the rotating pairs.
  7. 7. The ultra-low altitude parachute-free air drop device of claim 6, wherein the branched chain upper rod (905) is provided with a groove, the branched chain lower rod (904) is matched with the groove of the branched chain upper rod (905) when the mechanism platform is folded, so that interference of movement between the two rods is prevented when the mechanism is folded, the initial state of the branched chain (C) is an inclined state, and a singular state of the mechanism is prevented when the mechanism is folded.
  8. 8. The ultra-low altitude parachute-free air drop device of claim 7, wherein the lower platform (901), the middle platform (902), the upper platform (903) and the branched chain (C) are made of carbon fiber materials and metal inserts.
  9. 9. The ultra-low altitude parachute-free air drop device of claim 8, wherein two ends of the energy absorbing material (10) are fixedly connected with a platform of the one-dimensional unfolding mechanism (9), the mechanism platform extrudes the energy absorbing material when being folded under the action of pressure, and the energy absorbing material absorbs impact energy.
  10. 10. The ultra-low altitude parachute-free air drop device of claim 5, wherein the energy absorbing material (10) is aluminum honeycomb or foamed aluminum.

Description

Ultra-low-altitude parachute-free air drop device Technical Field The invention relates to the technical field of aerospace, in particular to an ultra-low-altitude parachute-free air drop device. Background In recent years, air drop transportation is rapidly developed and widely applied due to the characteristics of convenience and rapidness, and the delivery of army equipment materials is increasingly dependent on helicopters and mainly adopts 3 modes of parachute air drop, machine drop and parachute-free air drop. However, the former two modes have obvious defects that the early-stage preparation time of the parachute air drop is long, the timeliness is low, the parachute air drop is easily influenced by ground environment factors such as wind power, wind direction, tall trees and the like, the material spreading area is wide, the delivered equipment materials are not easy to quickly and intensively form fight force, and the parachute air drop is easy to find and even attack by enemies. The machine is lowered and has higher requirements on ground conditions, a certain area of flat and hard ground is needed to realize the machine lowering, the machine lowering cannot be realized on the ground such as jungles, deserts, thick snow, swamps, uneven mountain lands and the like, the delivery time is longer, and the danger coefficient is higher under the condition of no absolute empty right. Compared with the former two modes, the parachute-free air drop has the advantages of short preparation time, quick delivery, small influence by climatic conditions, small landing spread, reusability and the like. However, the current study of parachute-free air drop is mostly focused on parachute-free air drop of materials with low structural integrity requirements, such as liquid, food and the like, and the parachute-free air drop requirement of large-scale precision equipment cannot be met. Based on the above, the present inventors have proposed an ultra-low altitude parachute-free air drop device to solve the above-mentioned problems based on the filed patent (CN 113715764 a-a collision buffering energy absorbing device with a one-dimensional deployment mechanism and energy absorbing material combined action). Disclosure of Invention The invention aims at overcoming the defects of the prior art and providing an ultra-low-altitude parachute-free air drop device which has two states of folding, compacting, unfolding and locking. When the helicopter cabin is in a helicopter cabin, the equipment is fixed on the device platform, the device is in a furling and compacting state so as to meet the storage requirement of the cabin, when the device is pushed out from the cabin to fall to a certain height to start landing, the support arm is unfolded to a working position and locked, and after the device is locked in place, the energy absorbing material in the support arm is used for absorbing impact energy, so that the safe landing of the air drop device is realized. In order to achieve the above purpose, the present invention provides the following technical solutions: The ultra-low altitude parachute-free air drop device comprises a platform, support arms and foot pads, wherein the platform is connected with four support arms through rotary hinges, support arm driving mechanisms and support arm unfolding locking mechanisms are arranged at the joint of the platform and each support arm, each support arm consists of three energy absorption modules, each energy absorption module is provided with an energy absorption module driving mechanism and an energy absorption module unfolding locking mechanism, the support arms are connected with the foot pads through spherical hinges, the support arms are folded and erected before use, each energy absorption module is folded together to form a rectangular body with smaller length, the placement direction of the rectangular body is consistent with the length direction of the platform, the support arms and the energy absorption modules are locked through electromagnetic locks, the rectangular body formed by folding the energy absorption modules forms a certain angle with an interface, the electromagnetic locks are unlocked during air drop, the energy absorption modules are unfolded and locked into a straight line, and the support arms form a certain angle with the platform and incline downwards; The support arm driving mechanism comprises a first sliding block, a first connecting rod, a first crank, a first large gear shaft, a first large gear, a first small gear shaft and a first small gear, wherein two ends of the first sliding block are connected with the platform through a first cylindrical helical compression spring and a first cylindrical helical extension spring respectively, one end of the first connecting rod is connected with the first sliding block through a revolute pair, and the other end of the first connecting rod is connected with the first crank through a revolute pair; one end