CN118124806A - Stable lifting device for helicopter rescue - Google Patents

Abstract

The invention discloses a stable lifting device for helicopter rescue, which belongs to the technical field of rescue helicopter accessories and comprises a cable, wherein one end of the cable is connected with an assembly part, the assembly part is provided with a hook and is connected with a platform, the assembly part comprises a base body, a sleeve body is connected in a sliding manner in the base body, the tail end of the cable is connected with a column sleeve, the column sleeve is in threaded connection with the sleeve body, the hook is arranged at the bottom of the base body, a base is arranged at the bottom end of the sleeve body, a first spring is connected between the base and the base body, guide pieces are uniformly distributed on the side of the base, each guide piece comprises a clamping sleeve, the clamping sleeve is fixed on the base, clamping grooves are uniformly distributed on the inner wall of the base body, the clamping sleeve can lift and rotate relative to the clamping grooves, and an air bag is sleeved in the clamping sleeve. The invention can realize stable lifting and hanging, and improves rescue efficiency.

Description

A stable lifting device for helicopter rescue

Technical Field

The invention relates to the technical field of rescue helicopter accessories, and in particular to a stabilizing lifting device for helicopter rescue.

Background technique

Rescue helicopters are helicopters used for emergency rescue. They can reach the work site that is inaccessible by water or land more quickly, and carry out search and rescue, material transportation, air command and other tasks. They are the most effective emergency rescue commonly used in many countries in the world. There are generally three methods of helicopter rescue. The first is direct helicopter landing for rescue; the second is helicopter hovering, dropping slings and rescue with rescuers; the third is helicopter hovering, dropping rope ladders for rescue. Therefore, when it is necessary to rescue survivors, a lifting device is needed to achieve timely rescue of trapped people at different heights.

When the lifting device in the prior art is installed, it can only be used in conjunction with a fixed type of helicopter. The scope of use of the device is limited. When there is no need to rescue survivors, the lifting device installed at the bottom of the helicopter greatly reduces the passability of the helicopter. Therefore, when the rescue work is not performed, the lifting device needs to be disassembled. However, the traditional device requires the disassembly of a large number of fixed structures before the device can be removed, which greatly increases the difficulty of disassembly and reduces the efficiency of disassembly. When using the lifting device for rescue, after the survivors enter the hanging box, the personnel on the helicopter control the lifting rope to rise and carry the survivors away from the accident site. When the helicopter is moving, the hanging basket will move to the rear of the helicopter's moving direction due to air resistance, causing the hanging basket to tilt. The rescued person is prone to fall or even fall, which poses a great safety risk.

The US invention patent with application number US14795843 discloses a helicopter lifting system, which includes a lifting device, a lighting system, a distance measuring device, a camera, a communication system, and a display device. The system also includes an intelligent hook for measuring the load. The lighting can be illuminated in different ways according to the measured load on the cable. On the other hand, the system can present the measurement parameters to the helicopter crew or other observers. The invention still has room for improvement in the following technical issues: the hoisted device will shake and rotate due to wind resistance in the air, and the traction and lifting rope will be pulled, which is easy to cause wear and tear, and there is a risk; the hoisted device will have a large impact when it touches the ground, which is easy to cause damage.

Summary of the invention

The object of the present invention is to provide a helicopter rescue stabilizing lifting device with high stability.

In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

A stable lifting device for helicopter rescue includes a cable, one end of the cable is connected to an assembly part, the assembly part is provided with a hook and connected to a platform, the assembly part includes a base, a sleeve body is slidably connected in the base, a column sleeve is connected to the end of the cable, the column sleeve is threadedly connected to the sleeve body, and the hook is arranged at the bottom of the base body. The threaded matching arrangement of the sleeve body and the column sleeve is convenient for disassembly and assembly, and improves the connection speed between the platform and the cable in the event of an accident.

Preferably, a base is provided at the bottom of the sleeve, a first spring is connected between the base and the base, and guides are evenly arranged on the sides of the base. The sleeve is fixed to the base, and the sleeve is elastically connected to the base through the first spring. When the platform shakes due to a change in load, the sleeve slides upward relative to the base by compressing the first spring, thereby buffering the shaking to reduce interference at the threaded connection between the column sleeve and the sleeve, and preventing the thread from slipping and causing the matching failure. At the same time, the compressed first spring can reduce the possibility of a sudden increase in tension causing the cable connection to break. When the hook is connected to the platform, the first spring is always in a compressed state, that is, the first spring will not be stretched, avoiding the first spring from being overly stretched and losing its elastic deformation recovery ability.

Preferably, the guide member includes a ferrule, which is fixed to the base, and the inner wall of the base is evenly provided with ferrules, and the ferrule can be lifted and rotated relative to the ferrule, and an airbag is provided inside the ferrule. The ferrule guides the sliding motion of the ferrule, reduces the possibility of the ferrule tilting and hitting the inside of the base, reduces interference to improve assembly stability, and when there is an offset load on the platform or a lateral external force, the platform rotates by carrying the base through the hook, and the rotation of the ferrule relative to the ferrule can reduce the amplitude of the rotation of the column sleeve and the cable, on the one hand, the cable is prevented from being continuously twisted and causing the structural strength of the rope to be weakened, affecting the safety of the platform suspension, and on the other hand, the ferrule can rotate relative to the base through the ferrule and the ferrule, and the rotational motion consumes the shaking interference transmitted from the ferrule to the base, thereby stabilizing the base and the platform connected thereto, which helps to stabilize the verticality of the platform when the helicopter's flight attitude changes, and improves the safety during flight.

Preferably, the ferrule has an outer arc surface, the slot has an inner arc surface, the outer arc surface and the inner arc surface are arranged in coordination, the slot also has a vertical surface, the end of the airbag is located outside the ferrule, and there is a gap between the end of the airbag and the adjacent vertical surface. The setting of the outer arc surface and the inner arc surface is used for the lifting and lowering guide of the ferrule relative to the slot, and at the same time, ensures the center of rotation of the sleeve relative to the base. When the platform shakes and rotates, the base rotates relative to the sleeve. At this time, the outer arc surface of the base forms a rotation guide for the inner arc surface of the ferrule. At the same time, the airbags extending from both ends of the ferrule can rotate synchronously and hit the vertical surface of the slot. On the one hand, the elastic deformation of the airbag after being compressed absorbs vibration interference to reduce the interference between the sleeve and the column sleeve assembly. On the other hand, after the base rotates relative to the sleeve, the airbag collides with the vertical surface to cause deformation. The rotation impact of the outer sleeve during the deformation process The impact energy is dispersed and consumed. At the same time, after the airbag is hit, the carrying base rotates slightly relative to the base, that is, the rotational energy of the base is dispersed to the deformation of the airbag and the rotational movement of the airbag. Without affecting the structural strength of the cable, the overall rotation deceleration of the base is achieved, which helps to restore the stability of the platform and reduce the risk of discomfort and falling caused by the platform rotation to the survivors. The ferrule is not completely wrapped around the outside of the airbag, which realizes rotation and sliding guidance while protecting the airbag to avoid direct contact between the airbag and the slide groove, resulting in friction caused by sliding to damage the airbag, thereby reducing maintenance costs.

Preferably, a first ring body is rotatably connected to the inner side of the column sleeve, a second ring body is rotatably connected to the inner side of the first ring body, a third ring body is rotatably connected to the inner side of the second ring body, a shaft rod is fixed inside the third ring body, one end of the cable is fixedly connected to the shaft rod, and the other end of the cable is connected to a winding device, which is used to retract and release the cable. The axes of rotation of the first ring body, the second ring body and the third ring body are perpendicular to each other. When the helicopter turns in the air or the flight is unstable, the helicopter pulls one end of the cable to cause shaking. At this time, the cable can contact the first ring body, the second ring body and the third ring body, so that the first ring body, the second ring body and the third ring body rotate relatively. On the one hand, it can quickly assist in straightening the cable and reduce the shaking amplitude of the cable, thereby reducing the shaking amplitude of the platform. On the other hand, the rotating first ring body, the second ring body and the third ring body can form protection at the end of the cable, reducing the risk of friction and breakage between the cable and the inner edge of the column sleeve.

Preferably, the platform includes a bottom plate and a top cover, the top cover is mounted above the bottom plate, the top cover includes an upper plate, a lower plate and a connecting rod, the upper plate is arranged above the lower plate and there is a height interval, there are at least three connecting rods and they are evenly distributed between the upper plate and the lower plate, one end of the connecting rod is hinged to the lower plate, and the other end of the connecting rod is movably connected to the upper plate.

Preferably, one end of the connecting rod is hinged to the outer edge of the upper end surface of the lower plate, and the other end of the connecting rod is hinged to a slider. The upper plate has a slide groove that allows the slider to slide horizontally, and the slider and the slide groove are connected to a second spring. The connecting rod forms a movable connection between the upper plate and the lower plate. When the helicopter is flying with the hoisted platform, the platform is shaken by wind resistance and airflow. At this time, the lower plate drives the connecting rod to swing, and at the same time, the slider at the end of the connecting rod slides in the slide groove and squeezes the second spring, thereby achieving a shaking buffer for the bottom plate relative to the upper plate, which is beneficial to improving the stability of the bottom plate, avoiding the shaking of the platform affecting the flight stability of the helicopter, and reducing the possibility of the survivor falling or falling. When rescuing survivors who are not on the ground, the survivor enters the platform from one end of the suspended bottom plate. At this time, the center of the bottom plate is offset to the stepping position. While the slider squeezes the spring in the slide groove, the connecting rod swings at the hinge, causing the bottom plate and the lower plate to move relative to the top plate. Downward displacement, that is, converting the unilateral pressure on the bottom plate into downward displacement of the lower plate relative to the upper plate, reduces the tilt and shaking amplitude of the bottom plate, and improves the safety of the survivors' boarding platform. During the flight of the helicopter carrying the platform, the helicopter's flight altitude changes due to the flight trajectory and airflow. At this time, the slider squeezes the second spring to buffer the change in the gap between the lower plate and the upper plate, thereby stabilizing the height of the platform and improving the safety of the survivors during the flight. When the helicopter arrives at a safe place and drops the platform to the ground, an impact force is generated after the bottom plate contacts the ground. The impact force is buffered by the swing of the connecting rod and the slider squeezing the second spring in the slide groove, reducing the ground interference transmitted to the assembly and causing damage to parts.

Preferably, a support rod is arranged around the bottom plate, and the lower plate is connected to the bottom plate through the support rod. An elastic rope is arranged above the bottom plate, and the elastic rope is connected around the inner side of the support rod. Ring-shaped drawstrings are arranged on the elastic rope at intervals. The support rod forms a connection between the floor and the lower plate, and the elastic rope arranged inside it is convenient for the survivor to grab and enter the middle of the bottom plate, and also forms a side protection for the survivor who enters, reducing the risk of falling. The arrangement of the support rod and the elastic rope makes the wind resistance have less impact on the platform, and the drawstring helps the survivor in the bottom plate to pull to stabilize the body, reducing the risk of the survivor falling down the slide caused by the shaking of the platform.

Preferably, an air cushion is provided at the bottom of the bottom plate, and the bottom plate is a flexible plate. The air cushion can buffer the impact of the bottom plate touching the bottom, and when the survivor steps on the bottom plate, the bottom plate deforms and dents, which helps to stabilize the position of the survivor, reduce the risk of rolling and falling, and improve safety.

Compared with the prior art, the present invention has the following beneficial effects: the cable and the sleeve are connected by threads, which is convenient for disassembly; the first spring realizes the consumption of longitudinal interference, reduces the possibility of thread slippage and wear at the threaded connection, and enhances the life of parts; the guide member guides the first spring to extend and retract, and protects the elastic deformation capacity; the rotation of the base realizes energy consumption through the impact and rotation of the airbag in the slide groove, promotes the platform to restore stability, and improves the safety of flight transfer; the airbag consumes vibration interference transmission through deformation, and reduces the interference at the threaded connection; the sliding sleeve wraps the middle part of the airbag, realizes rotation guidance while avoiding the wear and rupture of the airbag, and reduces the maintenance cost; the slide groove limits the rotation of the airbag to prevent the first spring from excessive torsion deformation and loss of vibration isolation capacity; different ring bodies straighten the cable by rotation, reduce the shaking amplitude, and improve the stability of the platform flight; different ring bodies avoid the shaking of the cable and the contact wear of the column sleeve, and improve the connection safety; the upper plate and the lower plate can move relative to each other through the swinging sliding energy of the connecting rod, which helps to consume external impact and landing impact, and improve the life of parts and the safety of survivor transfer; the setting of the elastic rope and the drawstring facilitates the survivors to quickly enter the platform and improve the rescue rate. Therefore, the present invention is a stable lifting device for helicopter rescue with stability.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the implementation of the present invention or the technical solution in the prior art, the following briefly introduces the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

FIG1 is a schematic front view of a stabilizing and lifting device for helicopter rescue;

FIG2 is a schematic cross-sectional view of an assembly;

FIG3 is a schematic diagram of a guide member;

FIG4 is a schematic diagram showing the positions of the outer curved surface and the inner curved surface;

FIG5 is a schematic diagram of the structures of the first ring body, the second ring body and the third ring body;

FIG6 is a schematic cross-sectional view of the top cover;

FIG. 7 is a schematic diagram of the structure of the connecting rod.

Figure numbers: cable 1; column sleeve 10; first ring body 11; second ring body 12; third ring body 13; shaft rod 14; assembly part 2; base 20; sleeve body 21; base 22; first spring 23; sleeve 24; outer arc surface 240; slot 25; inner arc surface 250; end surface 251; airbag 26; platform; bottom plate 3; support rod 30; elastic rope 31; drawstring 32; air cushion 33; top cover 4; upper plate 40; lower plate 41; connecting rod 42; slider 43; slide groove 44; second spring 45; adjustment plate 46; through hole 47.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

Referring to Figures 1-2, a stable lifting device for helicopter rescue includes a cable 1, one end of the cable 1 is connected to an assembly part 2, the assembly part 2 is provided with a hook and connected to a platform, the assembly part 2 includes a base 20, a sleeve 21 is slidably connected inside the base 20, the end of the cable 1 is connected to a column sleeve 10, the column sleeve 10 is threadedly connected to the sleeve 21, and the hook is provided at the bottom of the base 20.

It should be noted that the base 20 is connected to the hook at the bottom through threaded assembly, and the hook includes but is not limited to a carabiner.

The base 20 includes a shell body with an opening at the upper end and a cover body. The cover body is assembled and connected on the upper part of the shell body. A circular hole is opened in the middle of the cover body. The sleeve body 21 passes through the circular hole and is slidably connected with the cover body.

The threaded matching arrangement of the sleeve body 21 and the column sleeve 10 facilitates assembly and disassembly, thereby increasing the connection speed between the platform and the cable 1 in the event of an accident.

3-4 , a base 22 is provided at the bottom end of the sleeve 21 , a first spring 23 is connected between the base 22 and the base 20 , and guide members are evenly arranged on the sides of the base 22 .

It should be noted that the base 22 includes a plate body and a column body, the plate body is fixed to the bottom end of the sleeve body 21, the column body is fixed to the bottom end of the plate body, the upper end surface of the plate body is larger than the bottom end surface of the sleeve body 21, and the first spring 23 is connected between the upper end surface of the plate body and the inner top end of the cover body, and the first spring 23 is sleeved on the outside of the sleeve body 21.

During assembly, the sleeve 21 is first passed through the circular hole of the shell from bottom to top, the cover body is connected to the base 22 through the spring, and then the cover body is assembled with the shell to form a connection.

The sleeve 21 is fixed to the base 22, and the sleeve 21 forms an elastic connection with the base 20 through the first spring 23. When the platform shakes due to a change in load, the sleeve 21 slides upward relative to the base 20 by compressing the first spring 23, thereby buffering the shaking to reduce interference at the threaded connection between the column sleeve 10 and the sleeve 21, and prevent thread slippage from causing cooperation failure. At the same time, the compressed first spring 23 can reduce the possibility of a sudden increase in tension causing the cable 1 to break. When the hook is connected to the platform, the first spring 23 is always in a compressed state, that is, the first spring 23 will not be stretched, thereby avoiding excessive tension on the first spring 23 and causing the loss of elastic deformation recovery ability.

The guide member includes a clamping sleeve 24, which is fixed to the base 22. The inner wall of the base 20 is evenly provided with clamping grooves 25. The clamping sleeve 24 can be lifted and rotated relative to the clamping grooves 25. An air bag 26 is sleeved inside the clamping sleeve 24.

It should be noted that the card slot 25 passes upward to the upper end of the housing to facilitate the installation of the card sleeve 24 , and the sliding of the card sleeve 24 in the card slot 25 is limited by the first spring 23 .

The slot 25 guides the sliding motion of the sleeve 24, reduces the possibility of the sleeve 24 tilting and hitting the inside of the base 20, reduces interference to improve assembly stability, and when there is an off-load on the platform or is subjected to lateral external force, the platform rotates by carrying the base 20 through the hook. The rotation of the slot 25 relative to the sleeve 24 can reduce the rotation amplitude of the sleeve 21 carrying the column sleeve 10 and the cable 1. On the one hand, it avoids the continuous twisting of the cable 1 that weakens the strength of the rope structure and affects the safety of the platform suspension. On the other hand, the sleeve 21 can rotate relative to the base through the sleeve 24 and the slot 25. The rotational motion consumes the shaking interference transmitted from the sleeve 21 to the base 20, thereby stabilizing the base 20 and the platform connected thereto, which helps to stabilize the verticality of the platform when the helicopter's flight attitude changes, thereby improving safety during flight.

The ferrule 24 has an outer arc surface 240 , and the slot 25 has an inner arc surface 250 . The outer arc surface 240 and the inner arc surface 250 are arranged in coordination. The slot 25 also has a vertical surface 251 . The end of the airbag 26 is located outside the ferrule 24 , and there is a gap between the end of the airbag 26 and the adjacent vertical surface 251 .

The outer arc surface 240 and the inner arc surface 250 are provided to guide the lifting and lowering of the sleeve 24 relative to the slot 25, and at the same time, ensure the center of rotation of the sleeve 21 relative to the base 20. When the platform shakes and rotates, the base 20 rotates relative to the sleeve 21. At this time, the outer arc surface 240 of the base 20 forms a rotation guide for the inner arc surface 250 of the sleeve 24. At the same time, the airbags 26 extending from both ends of the sleeve 24 can rotate synchronously and hit the vertical surface 251 of the slot 25. On the one hand, the elastic deformation of the airbag 26 after being compressed absorbs the vibration interference to reduce the interference at the assembly of the sleeve 21 and the column sleeve 10. On the other hand, after the base 20 rotates relative to the sleeve 21, the airbag 26 hits the vertical surface 251 and deforms. During the deformation process, the rotational impact energy of the jacket is dispersed and consumed. At the same time, after the airbag 26 is hit, the carrying base 22 rotates slightly relative to the base 20, that is, the rotational energy of the base 20 is dispersed to the deformation of the airbag 26 and the rotational movement of the airbag 26. Without affecting the structural strength of the cable 1, the overall rotation deceleration of the base 20 is achieved, which helps to restore the stability of the platform and reduce the risk of discomfort and falling of survivors caused by the platform rotation. The ferrule 24 is not completely wrapped around the outside of the airbag 26, which realizes rotation and sliding guidance while protecting the airbag 26 to avoid direct contact between the airbag 26 and the slide groove 44, resulting in the friction generated by the sliding damaging the airbag 26, thereby reducing maintenance costs.

Referring to Figure 5, the first ring body 11 is rotatably connected to the inner side of the column sleeve 10, the second ring body 12 is rotatably connected to the inner side of the first ring body 11, the third ring body 13 is rotatably connected to the inner side of the second ring body 12, a shaft rod 14 is fixed inside the third ring body 13, one end of the cable 1 is fixedly connected to the shaft rod 14, and the other end of the cable 1 is connected to a winding device, which is used to retract and release the cable 1.

It should be noted that the winding device is arranged in the helicopter, and the winding device realizes the lifting and lowering of the platform by winding and releasing the cable 1.

The axes of rotation of the first ring body 11, the second ring body 12 and the third ring body 13 are perpendicular to each other. When the helicopter turns in the air or flies unstably, the helicopter pulls one end of the cable 1 to cause it to shake. At this time, the cable 1 can contact the first ring body 11, the second ring body 12 and the third ring body 13, so that the first ring body 11, the second ring body 12 and the third ring body 13 can rotate relative to each other. On the one hand, it can quickly assist in straightening the cable 1 and reduce the shaking amplitude of the cable 1, thereby reducing the shaking amplitude of the platform. On the other hand, the rotating first ring body 11, the second ring body 12 and the third ring body 13 can form a protection at the end position of the cable 1, reducing the risk of friction and breakage between the cable 1 and the inner edge of the column sleeve 10.

Referring to Figure 6, the platform includes a bottom plate 3 and a top cover 4, the top cover 4 is mounted above the bottom plate 3, the top cover 4 includes an upper plate 40, a lower plate 41 and a connecting rod 42, the upper plate 40 is arranged above the lower plate 41 and there is a height interval, there are at least three connecting rods 42 and they are evenly distributed between the upper plate 40 and the lower plate 41, one end of the connecting rod 42 is hinged to the lower plate 41, and the other end of the connecting rod 42 is movably connected to the upper plate 40.

One end of the connecting rod 42 is hinged to the outer edge of the upper end surface of the lower plate 41, and the other end of the connecting rod 42 is hinged to a slider 43. The upper plate 40 has a slide groove 44 allowing the slider 43 to slide horizontally. The slider 43 and the slide groove 44 are connected by a second spring 45.

The connecting rod 42 forms an active connection between the upper plate 40 and the lower plate 41. When the helicopter is flying with the hoisted platform, the platform is shaken by wind resistance and airflow. At this time, the lower plate 41 drives the connecting rod 42 to swing. At the same time, the slider 43 at the end of the connecting rod 42 slides in the slide groove 44 and squeezes the second spring 45, thereby achieving the shaking buffer of the bottom plate 3 relative to the upper plate 40, which is beneficial to improve the stability of the bottom plate 3 and prevent the shaking of the platform from affecting the flight stability of the helicopter. At the same time, the possibility of the survivor falling or falling is reduced. When rescuing the survivor who is not on the ground, the survivor enters the platform from one end of the suspended bottom plate 3. At this time, the center of the bottom plate 3 shifts to the stepping position. While the slider 43 squeezes the spring in the slide groove 44, the connecting rod 42 swings at the hinge, so that the bottom plate 3 and the lower plate 41 are relative to each other. The top plate is displaced downward, that is, the unilateral pressure on the bottom plate 3 is converted into the downward displacement of the lower plate 41 relative to the upper plate 40, thereby reducing the tilt and shaking amplitude of the bottom plate 3 and improving the safety of the survivors boarding the platform. During the flight of the helicopter carrying the platform, the helicopter changes its flight altitude due to the flight trajectory and airflow. At this time, the slider 43 squeezes the second spring 45 to buffer the change in the gap between the lower plate 41 and the upper plate 40, thereby stabilizing the height of the platform and improving the safety of the survivors during the flight. When the helicopter arrives at a safe place and drops the platform to the ground, the bottom plate 3 generates an impact force after contacting the ground. The swing of the connecting rod 42 and the slider 43 squeezing the second spring 45 in the slide groove 44 can buffer the impact force and reduce the ground interference transmitted to the assembly 2 to cause parts damage.

A support rod 30 is arranged around the bottom plate 3, and the lower plate 41 is connected to the bottom plate 3 through the support rod 30. An elastic rope 31 is arranged above the bottom plate 3, and the elastic rope 31 is connected around the inner side of the support rod 30. An annular drawstring 32 is arranged at intervals on the elastic rope 31.

The support rod 30 forms a connection between the bottom plate 3 and the lower plate 41. The elastic rope 31 arranged inside it is convenient for the survivor to grab and enter the middle of the bottom plate 3, and also forms a side protection for the survivor who enters, reducing the risk of falling. The setting of the support rod 30 and the elastic rope 31 makes the wind resistance have less impact on the platform. The pull strap 32 helps the survivor in the bottom plate 3 to pull to stabilize the body, reducing the risk of the survivor falling down the slide caused by the shaking of the platform.

An air cushion 33 is provided at the bottom of the bottom plate 3, and the bottom plate 3 is a flexible plate.

The air cushion 33 can buffer the impact when the bottom plate 3 touches the bottom. When the survivor steps on the bottom plate, the bottom plate deforms and becomes concave, which helps to stabilize the position of the survivor, reduce the risk of rolling or falling, and improve safety.

The top of the upper plate 40 has a lifting ring, and the hook can be connected to the lifting ring.

7 , an adjustment plate 46 is disposed on the side of the connecting rod 42 . The adjustment plate 46 can contact the lower plate 41 and the upper plate 40 . The adjustment plate 46 is an elastic plate and has a through hole 47 .

The helicopter uses the winding device to reel in the cable 1 so that the platform is close to the helicopter. When the platform rises and reaches under the helicopter, any change in the flight attitude of the helicopter will cause a change in the attitude of the upper plate 40. At this time, through the swing of the connecting rod 42 and the sliding of the slider 43, the upper plate 40 can follow the deviation and tilt of the helicopter while the lower plate 41 maintains a relatively horizontal attitude to ensure the verticality of the platform. During the sliding of the slider 43 to compress the second spring 45, the adjustment plate 46 follows the connecting rod 42 and swings upward from the horizontal attitude to an inclined state. At this time, the adjustment plate 46 can guide the lateral airflow upward, so that the airflow acts on the bottom of the upper plate 40, so that the upper plate 40 obtains an upward force, which is beneficial to reduce the weight pressure of the platform and the survivors on the helicopter and improve the flight stability of the helicopter.

When the adjustment plate 46 is kept in an inclined state, airflow can also pass through the through hole 47 to form noise, which helps to drive away the surrounding creatures and prevent flying creatures from approaching the platform to cause safety hazards.

The more survivors are carried on the base plate 3, the greater the tension on the lower plate 41, and the closer the posture of the connecting rod 42 is to the vertical state. At this time, the posture of the adjusting plate 46 is also closer to the vertical posture. At this time, the upward guiding ability of the adjusting plate 46 for the airflow is improved, thereby enhancing the airflow force on the upper plate 40, that is, the adjusting plate 46 can adaptively adjust the airflow guiding direction according to the load on the base plate 3, thereby adjusting the lifting force of the upper plate 40, which helps to stabilize the stability of the helicopter under different load conditions.

The embodiments and/or implementation methods described above are only used to illustrate the preferred embodiments and/or implementation methods for realizing the technology of the present invention, and are not intended to impose any form of limitation on the implementation methods of the technology of the present invention. Any technical personnel in this field may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention.

This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims (9)

1. A stable lifting device for helicopter rescue, comprising a cable (1), one end of the cable (1) being connected to an assembly part (2), the assembly part (2) being provided with a hook and connected to a platform, The invention is characterized in that the assembly part (2) comprises a base (20), a sleeve (21) is slidably connected inside the base (20), a column sleeve (10) is connected to the end of the cable (1), the column sleeve (10) is threadedly connected to the sleeve (21), and the hook is arranged at the bottom of the base (20). 2. A helicopter rescue stabilizing and lifting device according to claim 1, characterized in that: a base (22) is provided at the bottom end of the sleeve (21), a first spring (23) is connected between the base (22) and the base (20), and guide members are evenly arranged on the sides of the base (22). 3. A helicopter rescue stabilizing lifting device according to claim 2, characterized in that: the guide member includes a clamping sleeve (24), the clamping sleeve (24) is fixed to the base (22), the inner wall of the base (20) is evenly provided with clamping grooves (25), the clamping sleeve (24) can be lifted and rotated relative to the clamping grooves (25), and an airbag (26) is provided inside the clamping sleeve (24). 4. A helicopter rescue stabilizing and lifting device according to claim 3, characterized in that: the clamping sleeve (24) has an outer curved surface (240), the clamping slot (25) has an inner curved surface (250), the outer curved surface (240) and the inner curved surface (250) are arranged in coordination, the clamping slot (25) also has a vertical surface (251), the end of the airbag (26) is located outside the clamping sleeve (24), and there is a gap between the end of the airbag (26) and the adjacent vertical surface (251). 5. A helicopter rescue stabilizing lifting device according to claim 1, characterized in that: a first ring body (11) is rotatably connected to the inner side of the column sleeve (10), a second ring body (12) is rotatably connected to the inner side of the first ring body (11), a third ring body (13) is rotatably connected to the inner side of the second ring body (12), a shaft rod (14) is fixed inside the third ring body (13), one end of the cable (1) is fixedly connected to the shaft rod (14), and the other end of the cable (1) is connected to a winding device, and the winding device is used to retract and release the cable (1). 6. A helicopter rescue stabilizing and lifting device according to claim 1, characterized in that: the platform comprises a bottom plate (3) and a top cover (4), the top cover (4) is mounted above the bottom plate (3), the top cover (4) comprises an upper plate (40), a lower plate (41) and a connecting rod (42), the upper plate (40) is arranged above the lower plate (41) and there is a height interval, there are at least three connecting rods (42) and they are evenly arranged between the upper plate (40) and the lower plate (41), one end of the connecting rod (42) is hinged to the lower plate (41), and the other end of the connecting rod (42) is movably connected to the upper plate (40). 7. A helicopter rescue stabilizing and lifting device according to claim 6, characterized in that: one end of the connecting rod (42) is hinged to the outer edge of the upper end surface of the lower plate (41), the other end of the connecting rod (42) is hinged to a slider (43), the upper plate (40) has a slide groove (44) allowing the slider (43) to slide horizontally, and the slider (43) and the slide groove (44) are connected by a second spring (45). 8. A helicopter rescue stabilizing and lifting device according to claim 6, characterized in that: a support rod (30) is arranged around the bottom plate (3), the lower plate (41) is connected to the bottom plate (3) through the support rod (30), an elastic rope (31) is arranged above the bottom plate (3), the elastic rope (31) is connected around the inner side of the support rod (30), and annular drawstrings (32) are arranged at intervals on the elastic rope (31). 9. A helicopter rescue stabilizing and lifting device according to claim 6, characterized in that an air cushion (33) is provided at the bottom of the bottom plate (3), and the bottom plate (3) is a flexible plate.