Rescue helicopter ladder

Abstract

The present invention relates to the field of helicopter rescue, and provides a helicopter ladder for rescue. The ladder comprises a power mechanism, a closed-loop ladder body, and a second suspension wheel group, a first suspension wheel group, and a plurality of support wheel groups located in the same longitudinal plane. The second suspension wheel group is extended through a second arm and arranged at the helicopter hatch. The first suspension wheel group is extended through a first arm and arranged at the helicopter hatch. The plurality of support wheel groups are arranged on the inner wall of the helicopter cabin. The ladder body is connected with the first suspension wheel group, the plurality of support wheel groups, and the second suspension wheel group in a rolling manner in sequence. The part of the ladder body located between the first suspension wheel group and the second suspension wheel group is in a suspended shape, and the power mechanism is used to drive the ladder body to cyclically rotate. The closed ladder body and the power device ensure the cyclic operation of the rescue helicopter ladder, thereby improving the efficiency of rescue.

Description

Technical Field

[0001] The invention relates to the field of emergency rescue, and in particular to a helicopter suspension ladder for rescue. Background Art

[0002] Helicopter rescue is widely used in various emergency rescue scenarios. For emergency rescue, the efficiency of rescue is particularly important. When the rescue environment is water, mountain, jungle and other areas that are not suitable for helicopter landing, the rescue ladder plays a vital role. The rescue ladder is an important hardware facility for emergency rescue, especially suitable for helicopter rescue with a large number of people to be rescued and time is tight, as well as the rapid deployment and rapid evacuation of field troops.

[0003] In situations where it is not suitable for helicopters to take off and land, such as on water, in jungles and in mountains, the helicopter is suspended in the air, and it is usually necessary to lower a ladder or rescue rope for rescue. Existing ladders are generally only suitable for trained healthy people to climb onto the aircraft, or for the rescued person to step onto the ladder, then raise the ladder to the helicopter hatch, and then lower the ladder to carry the ground personnel, and repeat the operation until all the rescued people enter the helicopter hatch. Rescue ropes generally require full escort by rescue personnel, and a single rescue is limited to 1 to 2 people, while multiple people need to be repeatedly raised and lowered. This repeated operation cannot achieve uninterrupted, continuous and rapid transportation. When there are many people to be rescued, the efficiency is low, wasting precious rescue time. Summary of the invention

[0004] The invention aims to solve the technical problem that the existing helicopter suspension ladder rescue efficiency is low.

[0005] In order to solve the above technical problems, the present invention provides a rescue helicopter ladder, comprising a power mechanism, a closed-loop ladder body, and a second suspension wheel group, a first suspension wheel group and a plurality of supporting wheel groups located in the same longitudinal plane, the second suspension wheel group extending out through a second arm and arranged at the helicopter hatch, the first suspension wheel group extending out through a first arm and arranged at the helicopter hatch, a plurality of supporting wheel groups are arranged on the inner wall of the helicopter cabin, the ladder body is rollingly connected with the first suspension wheel group, the plurality of supporting wheel groups and the second suspension wheel group in sequence, the portion of the ladder body between the first suspension wheel group and the second suspension wheel group is in a suspended shape, and the power mechanism is used to drive the ladder body to cyclically rotate.

[0006] Optionally, the first boom and / or the second boom is a retractable structure or can be flipped inward and outward relative to the helicopter hatch.

[0007] Optionally, the second suspension wheel group is extended through the second arm and is set at the bottom of the helicopter hatch, and the first suspension wheel group is extended through the first arm and is set at the top of the helicopter hatch, and the extension distance of the first suspension wheel group is greater than the extension distance of the second suspension wheel group.

[0008] Optionally, a first rescue platform is provided at the bottom of the helicopter cabin and below the suspension ladder body.

[0009] Optionally, the first suspension wheel group includes a first roller and a second roller that are axially spaced and distributed, and the first roller and the second roller are respectively connected to the longitudinal cables on both sides of the suspension ladder body in a rolling manner.

[0010] Optionally, a second rescue platform is provided in the helicopter cabin and below the first boom.

[0011] Optionally, a safety belt hook is provided on the transverse ladder rod of the suspension ladder body, and the safety belt hook includes a hook body and an anti-slip assembly. The middle part of the hook body is hinged to the transverse ladder rod, and the anti-slip assembly is fixedly connected to the transverse ladder rod. The anti-slip assembly is used to form an openable and closable fit with the hook body. A stop block is provided above the suspension ladder body, and the stop block is used to form a contact with the outer side of the upper part of the hook body during the cyclic rotation of the suspension ladder body.

[0012] Optionally, a hanger support is provided on the inner wall near the top of the helicopter hatch, and a hanger is hinged on the hanger support, and the hanger is used to hang the first boom.

[0013] Optionally, the suspension ladder body is formed by a plurality of suspension ladder units that are detachably connected end to end.

[0014] Optionally, the plurality of suspension ladder units have a variety of length specifications.

[0015] The present invention provides a rescue helicopter suspension ladder, which respectively arranges a first suspension wheel group and a second suspension wheel group on a first boom and a second boom extending out of a helicopter hatch, and cooperates with a plurality of supporting wheel groups distributed in the helicopter cabin, so that a closed-loop suspension ladder body can be driven by a power mechanism to cyclically rotate, thereby utilizing a portion of the suspension ladder body suspended between the first suspension wheel group and the second suspension wheel group to achieve uninterrupted cyclic rescue, thereby greatly improving the efficiency of the rescue. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a rescue helicopter suspension ladder in one embodiment of the present invention;

[0017] Figure 2 It is a schematic cross-sectional view of the helicopter cabin before the main body of the suspension ladder is installed;

[0018] Figure 3 It is a schematic cross-sectional view of the helicopter cabin during the installation of the suspension ladder body;

[0019] Figure 4 This is a schematic cross-sectional view of the helicopter cabin when the main body of the suspension ladder is installed;

[0020] Figure 5 It is a partial front view of the suspension ladder body;

[0021] Figure 6 is a schematic diagram of a rescue helicopter ladder in another embodiment of the present invention;

[0022] Figure 7 It is the front view of the seat belt hook;

[0023] Figure 8 It is a right side view of the seat belt hook;

[0024] Figure 9A-9D It is a schematic diagram of the automatic unlocking process of the seat belt hook and the block.

[0025] Description of Reference Numerals

[0026] 10-ladder reel; 12-hanging bracket;

[0027] 20-suspended ladder body; 21-longitudinal cable; 22-transverse ladder rod;

[0028] 30-first boom;

[0029] 41-first suspension wheel set; 42-upper support wheel set; 43-lower support wheel set; 44-second suspension wheel set; 441-second arm bracket;

[0030] 50-first rescue platform; 51-second rescue platform;

[0031] 70 - stopper;

[0032] 80-seat belt hook;

[0033] 81-hook body; 811-hook portion; 812-cam-shaped structure; 82-anti-slip assembly; 821-rotating arm; 822-rotating wrist;

[0034] 91-Seat belt. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0036] like Figure 1As shown, a rescue helicopter ladder according to an embodiment of the present invention comprises a power mechanism (not shown in the figure), a closed-loop ladder body 20, and a second suspension wheel group 44, a first suspension wheel group 41 and a plurality of support wheel groups located in the same longitudinal plane. The lower suspension wheel group 44 is extended through the second arm 441 and is arranged at the bottom of the helicopter hatch. The first suspension wheel group 41 is extended through the first arm 30 and is arranged at the top of the helicopter hatch on the same side. The extension distance of the first suspension wheel group 41 is greater than the extension distance of the second suspension wheel group 44. Of course, the first arm 30 and the second arm 441 are not limited to being arranged at the helicopter hatch on the same side, but can also be extended from the hatches on both sides of the helicopter respectively, as long as the ladder body 20 can rotate in a closed loop.

[0037] Multiple supporting wheel groups are distributed at intervals along the inner wall of the helicopter cabin. For example, an upper supporting wheel group 42 and a lower supporting wheel group 43 can be respectively arranged in the top area and the bottom area of ​​the side wall opposite to the helicopter cabin opening; the suspension ladder body 20 is rollingly connected with the first suspension wheel group 41, multiple supporting wheel groups (upper supporting wheel group 42 and lower supporting wheel group 43) and the second suspension wheel group (44) in sequence, and the part of the suspension ladder body located between the first suspension wheel group 41 and the second suspension wheel group 44 is in a suspended state. The power mechanism is used to drive the suspension ladder body 20 to rotate in a cycle. The power mechanism can be a servo motor or a hydraulic motor, which can be connected with the upper supporting wheel group 42 to drive the upper supporting wheel group 42 to rotate, and then drive the suspension ladder body 20 to rotate in a cycle through the upper supporting wheel group 42. Of course, it can also be set on other wheel groups according to actual needs.

[0038] As can be seen from the above, in this embodiment, a part of the closed-loop suspension ladder body 20 is suspended outside the helicopter hatch through the first suspension wheel group, the second suspension wheel group and the plurality of supporting wheel groups, and the whole body is driven by the power mechanism to rotate in a circular motion, thereby realizing uninterrupted cyclic rescue and improving the efficiency of rescue.

[0039] In some embodiments, the first boom 30 is a retractable structure. Specifically, a retractable hydraulic cylinder can be selected, the cylinder body of the hydraulic cylinder is connected to the top of the helicopter cabin, the telescopic rod of the hydraulic cylinder can be retracted to the helicopter cabin, and the upper suspension wheel 41 is arranged at the outer end of the telescopic rod. When the rescue activity is not needed, the first boom 30 can be retracted to retract the upper suspension wheel 41 into the helicopter cabin. Figure 2 As shown, in order to facilitate the installation of the boom 30, a hanger support is provided on the inner wall near the top of the helicopter hatch, and a hanger 12 is hinged on the hanger support. The hanger 12 is used to hang the first boom 30, wherein the hanger support and the inner wall at the top of the helicopter hatch are preferably detachably connected and can be removed when there is no rescue mission.

[0040] In some embodiments, the second boom 441 can be flipped inward and outward relative to the helicopter hatch. The second boom 441 only needs to be flipped outward when performing rescue work. When the second boom 441 is flipped inward back to the helicopter hatch and the first boom 30 is in a retracted state, the helicopter door can be closed without affecting the flight of the helicopter. It should be understood that the above-mentioned first boom 30 can also adopt a structure that can be flipped inward and outward relative to the helicopter hatch, and the second boom 441 can also adopt a structure that can be telescopic relative to the helicopter hatch, as long as the first suspension wheel and the second suspension wheel can be retracted in a non-rescue state and extended out of the helicopter hatch in a rescue state. Of course, the first boom 30 and the second boom 441 are preferably structures that can be flipped inward and outward relative to the helicopter hatch, so that the structure is simple relative to the hydraulic telescopic mechanism, occupies less space, and is easy to operate.

[0041] When a helicopter performs different tasks, the length of the suspended ladder must be different due to the limitations of the helicopter's hovering height and the rescue environment. In this regard, in this embodiment, the ladder body 20 is configured to be composed of multiple ladder units that are detachably connected end to end, and each ladder unit is wound on a ladder reel 10, so that the length of the ladder body 20 can be adjusted according to the actual rescue height. Furthermore, the multiple ladder units have multiple length specifications to achieve the best length combination.

[0042] When rescue is needed, Figure 2 As shown, first install the hanger 12, the upper supporting wheel group 42, the lower supporting wheel group 43, the second arm 441 and the second suspension wheel group 44 in place, as shown in FIG. Figure 3 As shown, the first arm 30 is then installed. One end of the first arm 30 can share a mounting bracket with the upper supporting wheel group 42. According to the rescue environment, multiple groups of suspension ladder units of suitable length are selected. First, one group of suspension ladder units is passed around the upper supporting wheel group 42, the first suspension wheel group 41 and the lower supporting wheel group 43 in sequence. Then, part of the suspension ladder units between the first suspension wheel group 41 and the lower supporting wheel group 43 are passed over the second suspension wheel group 44 and suspended between the first suspension wheel group 41 and the second suspension wheel group 44. Finally, the remaining groups of suspension ladder units are connected in sequence, as shown in FIG. Figure 4 shown.

[0043] In some embodiments, the first suspension wheel group 41 includes a first roller and a second roller axially spaced apart, the first roller and the second roller are respectively connected to the longitudinal cables 21 on both sides of the suspension ladder body 20 in a rolling manner, and the gap between the first roller and the second roller allows the safety belt hook 80 and the safety belt to pass through.

[0044] A second rescue platform 51 is provided in the helicopter cabin and below the first boom 30. The second rescue platform 51 may be a tilted slide or a conveyor belt structure. The rescued person is released below the first boom 30 and falls on the second rescue platform 51. Then, the rescued person is transported by the second rescue platform 51 and avoids the position of the helicopter hatch, so as not to affect the rescued person who enters the hatch later.

[0045] In this embodiment, the suspension ladder body 20 can be Figure 1 The view angle rotates counterclockwise, and the person to be rescued is in a supine hanging posture at the armrest 30. Of course, the ladder body 20 can also be controlled to press Figure 6 The viewing angle rotates counterclockwise. At this time, the rescued person is in a kneeling position at the cabin door. In this embodiment, it is not necessary to set a gap between the first roller and the second roller in the first suspension wheel group 41, because the rescued person does not need to pass through the first suspension wheel group 41. If the rescued person is in a kneeling position at the cabin door, a first rescue platform 50 (not shown in the figure) can be provided at the bottom of the helicopter cabin and below the suspension ladder body 20. The first rescue platform 50 is preferably closely attached to the bottom of the suspension ladder body to support the rescued person. The rescued person does not need to walk with the suspension ladder body 20, and it is easier to unlock the seat belt hook.

[0046] In order to ensure the safety of the rescued personnel, Figure 5 As shown, a safety belt hook 80 is provided on the transverse ladder rod 22 of the suspension ladder body 20. Figure 7 and Figure 8 As shown, the safety belt hook includes a hook body 81 and an anti-slip assembly; further, the middle part of the hook body 81 is hinged to the transverse ladder rod 22, the anti-slip assembly is fixedly connected to the transverse ladder rod 22, the anti-slip assembly is used to form an openable and closable fit with the hook body, and a stopper 70 is provided above the suspension ladder body. The stopper 70 is used to form a contact with the outer side of the upper part of the hook body 81 during the cyclic rotation of the suspension ladder body 20.

[0047] Specifically, the top of the hook body 81 is a cam-shaped structure 812 shaped like a goose head, and the bottom of the hook body 81 is a hook portion 811. The main function of the hook portion 811 is to hook the safety belt 91, and the main function of the cam-shaped structure 812 is to cooperate with the stopper 70 and rotate under the push of the stopper 70.

[0048] Furthermore, the anti-slip assembly includes a rotating arm 821 and a rotating wrist 822, one end of the rotating arm 821 is fixedly connected to the horizontal ladder rod 22, the other end of the rotating arm 821 is hinged to one end of the rotating wrist 822, a restoring spring is connected between the rotating arm 821 and the rotating wrist 822, the restoring spring is used to drive the rotating wrist 822 to rotate relative to the rotating arm 821 in a direction away from the hook body 81, and a rotation limiting structure is provided between the rotating arm 821 and the rotating wrist 822, the rotation limiting structure is used to limit the range of the rotating wrist 822 to rotate relative to the rotating arm 821 in a direction away from the hook body 81. Among them, the rotating wrist 822 plays a role in facilitating the safety belt 91 to be hung on the hook body 81 and preventing the safety belt 91 from slipping out.

[0049] For the specific automatic unlocking process, please refer to Figure 9A-9D First, since the anti-slip assembly is fixedly connected to the horizontal ladder rod 22, when the automatic safety belt hook 80 rotates from the suspended position to the horizontal position, it will rotate upward by approximately 90° (see Figure 9A-9D The anti-drop assembly in the hook body 81 is opened to a certain extent. Then, as the suspension ladder body 50 continues to rotate, the hook body 81 passes through at least 9A to 9B in sequence. Fig.9D Four processes, Fig.9A This is the state where the cam structure 812 just starts to hit the stopper 70. Fig. 9B This is a state in which the hook body 81 starts to rotate as the suspension ladder body 50 rotates. Fig. 9C As the suspension ladder body 50 rotates, the hook body 81 continues to rotate and releases the safety belt 91. Fig.9D This is the state where the automatic seat belt hook 80 releases the seat belt 91 and is away from the block 70, thereby achieving automatic unlocking.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rescue helicopter ladder, characterized in that: It comprises a power mechanism, a closed-loop suspension ladder body, and a second suspension wheel group, a first suspension wheel group and a plurality of support wheel groups located in the same longitudinal plane, wherein the second suspension wheel group is extended through a second boom and arranged at a helicopter hatch, the first suspension wheel group is extended through a first boom and arranged at a helicopter hatch, and a plurality of support wheel groups are arranged on the inner wall of the helicopter cabin, the suspension ladder body is rollingly connected with the first suspension wheel group, the plurality of support wheel groups and the second suspension wheel group in sequence, the portion of the suspension ladder body located between the first suspension wheel group and the second suspension wheel group is in a suspended shape, and the power mechanism is used to drive the suspension ladder body to cyclically rotate; The second suspension wheel set is extended through the second arm and is arranged at the bottom of the helicopter hatch, and the first suspension wheel set is extended through the first arm and is arranged at the top of the helicopter hatch, and the extension distance of the first suspension wheel set is greater than the extension distance of the second suspension wheel set; The first suspension wheel group includes a first roller and a second roller that are axially spaced and distributed, and the first roller and the second roller are respectively connected to the longitudinal cables on both sides of the suspension ladder body in a rolling manner; A safety belt hook is provided on the transverse ladder rod of the suspension ladder body, and the safety belt hook includes a hook body and an anti-slip assembly, the middle part of the hook body is hinged with the transverse ladder rod, the anti-slip assembly is fixedly connected with the transverse ladder rod, the anti-slip assembly is used to form an openable and closable fit with the hook body, and a stopper is provided above the suspension ladder body, and the stopper is used to form a conflict with the outer side of the upper part of the hook body during the cyclic rotation of the suspension ladder body; The anti-slip assembly comprises a rotating arm and a rotating wrist, one end of the rotating arm is fixedly connected to the horizontal ladder rod, the other end of the rotating arm is hinged to one end of the rotating wrist, a restoring spring is connected between the rotating arm and the rotating wrist, the restoring spring is used to drive the rotating wrist to rotate relative to the rotating arm in a direction away from the hook body, a rotation limiting structure is provided between the rotating arm and the rotating wrist, and the rotation limiting structure is used to limit the range of rotation of the rotating wrist relative to the rotating arm in a direction away from the hook body; The first boom and / or the second boom is a retractable structure or can be flipped inwards and outwards relative to the helicopter hatch.

2. The rescue helicopter suspension ladder according to claim 1, characterized in that: A first rescue platform is provided at the bottom of the helicopter cabin and below the suspension ladder body.

3. The rescue helicopter ladder according to claim 1, characterized in that: A second rescue platform is provided in the helicopter cabin and below the first boom.

4. The rescue helicopter suspension ladder according to claim 1, characterized in that: A hanger support is provided on the inner wall near the top of the helicopter hatch, and a hanger is hinged on the hanger support. The hanger is used to hang the first boom.

5. The rescue helicopter suspension ladder according to any one of claims 1 to 4, characterized in that: The suspension ladder body is formed by a plurality of suspension ladder units which are detachably connected end to end.

6. The rescue helicopter suspension ladder according to claim 5, characterized in that: The plurality of suspension ladder units have various length specifications.

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