CN111099009A - Helicopter hanging ladder for rescue - Google Patents
Helicopter hanging ladder for rescue Download PDFInfo
- Publication number
- CN111099009A CN111099009A CN201811270245.0A CN201811270245A CN111099009A CN 111099009 A CN111099009 A CN 111099009A CN 201811270245 A CN201811270245 A CN 201811270245A CN 111099009 A CN111099009 A CN 111099009A
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- hanging
- helicopter
- ladder
- rescue
- wheel set
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- 238000005096 rolling process Methods 0.000 claims abstract description 6
- 239000000725 suspension Substances 0.000 claims description 56
- 238000000034 method Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims 1
- 210000000707 wrist Anatomy 0.000 description 8
- 238000009434 installation Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000272814 Anser sp. Species 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/24—Steps mounted on, and retractable within, fuselages
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Ladders (AREA)
Abstract
The invention relates to the field of helicopter rescue, and provides a helicopter hanging ladder for rescue. The hanging ladder comprises a power mechanism, a closed-loop hanging ladder body, a second hanging wheel set, a first hanging wheel set and a plurality of supporting wheel sets, wherein the second hanging wheel set, the first hanging wheel set and the plurality of supporting wheel sets are located in the same longitudinal plane, the second hanging wheel set is extended out through a second arm support and is arranged in a helicopter hatch, the first hanging wheel set is extended out through a first arm support and is arranged in the helicopter hatch, the plurality of supporting wheel sets are arranged on the inner wall of the helicopter cabin, the hanging ladder body is sequentially connected with the first hanging wheel set, the plurality of supporting wheel sets and the second hanging wheel set in a rolling fit mode, the hanging ladder body is located between the first hanging wheel set and the second hanging wheel set, the hanging ladder body is in a hanging shape, and the power mechanism is used for driving the hanging ladder body to rotate circularly. The closed hanging ladder body and the power device ensure the circular operation of the hanging ladder of the helicopter for rescue, thereby improving the rescue efficiency.
Description
Technical Field
The invention relates to the field of emergency rescue, in particular to a helicopter hanging ladder for rescue.
Background
Helicopter rescue is generally applied to various emergency rescue scenes, and the high efficiency of rescue is particularly important for emergency rescue. When the rescue environment is the region which is not suitable for landing by a helicopter, such as water, mountain regions, jungles and the like, the rescue hanging ladder plays a vital role, is an important hardware facility for emergency rescue, and is particularly suitable for helicopter rescue with more people to be rescued and time-critical, and quick soldiers and quick evacuation of field troops.
Under the conditions that the helicopter is not suitable for rising and falling on water, jungles, mountains and the like, the helicopter is suspended in the air, and a hanging ladder or a rescue rope is usually required to be dropped for rescue. The existing hanging ladder is generally only suitable for trained healthy people to climb on an airplane, or after being stepped on by rescuers, the hanging ladder is lifted to the mouth of a cabin of a helicopter, then the hanging ladder is descended to carry ground personnel, and the operation is repeated until all the rescuers enter the mouth of the cabin of the helicopter. The rescue rope generally needs to be carried by rescue workers in the whole process, the single rescue is limited, only 1-2 people can be rescued, and multiple people need to repeatedly lift and descend. The repeated operation cannot realize continuous, cyclic and continuous rapid transportation, and when more people are carried for rescue, the efficiency is low, and precious rescue time is wasted.
Disclosure of Invention
The invention aims to solve the technical problem of low rescue efficiency of the existing helicopter hanging ladder.
In order to solve the technical problem, the invention provides a helicopter hanging ladder for rescue, which comprises a power mechanism, a closed-loop hanging ladder body, a second hanging wheel set, a first hanging wheel set and a plurality of supporting wheel sets, wherein the second hanging wheel set, the first hanging wheel set and the plurality of supporting wheel sets are positioned in the same longitudinal plane, the second hanging wheel set extends out of a helicopter hatch through a second arm support, the first hanging wheel set extends out of the helicopter hatch through a first arm support, the plurality of supporting wheel sets are arranged on the inner wall of the helicopter cabin, the hanging ladder body is sequentially connected with the first hanging wheel set, the plurality of supporting wheel sets and the second hanging wheel set in a rolling fit mode, a part of the hanging ladder body between the first hanging wheel set and the second hanging wheel set is in a hanging shape, and the power mechanism is used for driving the hanging ladder body to rotate circularly.
Optionally, the first arm support and/or the second arm support may be of a telescopic structure or may be turned inward and outward relative to a helicopter hatch.
Optionally, the second suspension wheel set is extended out from the bottom of the helicopter hatch through the second boom, the first suspension wheel set is extended out from the top of the helicopter hatch through the first boom, and the extended distance of the first suspension wheel set is greater than the extended distance of the second suspension wheel set.
Optionally, a first rescue platform is padded at the bottom of the helicopter cabin and below the hanging ladder body.
Optionally, the first suspension wheel set comprises a first roller and a second roller which are axially distributed at intervals, and the first roller and the second roller are respectively connected with the longitudinal cables on the two sides of the suspension ladder body in a rolling fit manner.
Optionally, a second rescue platform is arranged in the helicopter cabin and below the first arm support.
Optionally, be equipped with the safety belt couple on the horizontal ladder pole of hanging oneself from a ladder body, the safety belt couple is including couple body and anticreep subassembly, the middle part of couple body with horizontal ladder pole is articulated, the anticreep subassembly with horizontal ladder pole fixed connection, the anticreep subassembly be used for with the couple body forms the cooperation of can opening and shutting the top of hanging oneself from a ladder body is equipped with the dog, the dog is used for hanging oneself from a ladder body circulation pivoted in-process with the outside on couple body upper portion forms contradicts.
Optionally, a hanger support is arranged on the inner wall close to the top of the helicopter hatch, a hanger is hinged to the hanger support, and the hanger is used for hanging the first boom.
Optionally, the hanging ladder body is formed by detachably connecting a plurality of hanging ladder units end to end.
Optionally, a plurality of the hanging ladder units have a plurality of length specifications.
According to the helicopter hanging ladder for rescue, the first hanging wheel set and the second hanging wheel set are respectively arranged on the first arm support and the second arm support extending out of the helicopter hatch, and the closed-loop hanging ladder body can rotate circularly under the driving of the power mechanism by matching with the plurality of supporting wheel sets distributed in the helicopter cabin, so that uninterrupted circulating rescue is realized by utilizing the part of the hanging ladder body suspended between the first hanging wheel set and the second hanging wheel set, and the rescue efficiency is greatly improved.
Drawings
FIG. 1 is a schematic view of a rescue helicopter hanging ladder in one embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the helicopter nacelle prior to installation of the hanging ladder body;
FIG. 3 is a schematic cross-sectional view of the helicopter nacelle during installation of the hanging ladder body;
FIG. 4 is a schematic cross-sectional view of the helicopter nacelle with the installation of the hanging ladder body completed;
FIG. 5 is a partial front schematic view of a body of the cantilever ladder;
FIG. 6 is a schematic view of a rescue helicopter hanging ladder in another embodiment of the present invention;
FIG. 7 is a front view of the seat belt hanger;
FIG. 8 is a right side view of the seat belt hanger;
fig. 9A-9D are schematic views of the automatic unlocking process of the belt hook in cooperation with the stopper.
Description of the reference numerals
10-a hanging ladder reel; 12-a hanger;
20-a cantilever ladder body; 21-longitudinal cable; 22-transverse ladder bars;
30-a first arm support;
41-a first set of suspension wheels; 42-upper support wheel set; 43-a lower support wheel set; 44-a second set of suspension wheels; 441-a second arm support;
50-a first rescue platform; 51-a second rescue platform;
70-a stop block;
80-safety belt hook;
81-hook body; 811-hook portion; 812-a cam-like structure; 82-a disengagement prevention assembly; 821-a rotating arm; 822-rotating the wrist;
91-safety belt.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1, a helicopter suspension ladder for rescue according to an embodiment of the present invention includes a power mechanism (not shown in the figure), a closed-loop suspension ladder body 20, a second suspension wheel set 44, a first suspension wheel set 41, and a plurality of support wheel sets located in the same longitudinal plane, where the lower suspension wheel set 44 protrudes through a second arm support 441 and is disposed at the bottom of a helicopter hatch, the first suspension wheel set 41 protrudes through a first arm support 30 and is disposed at the top of the helicopter hatch on the same side, and the protruding distance of the first suspension wheel set 41 is greater than the protruding distance of the second suspension wheel set 44, and certainly, the first arm support 30 and the second arm support 441 are not limited to being disposed at the helicopter hatch on the same side, and may also protrude from hatches on both sides of the helicopter, as long as the suspension ladder body 20 can rotate in a closed loop.
A plurality of support wheel sets are distributed at intervals along the inner wall of the helicopter cabin, for example, an upper support wheel set 42 and a lower support wheel set 43 are respectively arranged at the top area and the bottom area of the side wall close to the opposite side of the helicopter hatch; the suspension ladder body 20 is connected with the first suspension wheel set 41, a plurality of support wheel sets (upper support wheel set 42 and lower support wheel set 43) and the second suspension wheel set (44) in a rolling fit manner, the part of the suspension ladder body between the first suspension wheel set 41 and the second suspension wheel set 44 is in a suspension shape, the power mechanism is used for driving the suspension ladder body 20 to rotate circularly, the power mechanism can be a servo motor or a hydraulic motor, can be connected with the upper support wheel set 42 in a matching manner, so as to drive the upper support wheel set 42 to rotate, and further drive the suspension ladder body 20 to rotate circularly through the upper support wheel set 42, and can be set on other wheel sets according to actual requirements.
As can be seen from the above, in the present embodiment, the first suspension wheel set, the second suspension wheel set and the plurality of support wheel sets are used to suspend the part of the closed loop-shaped suspension ladder body 20 outside the helicopter hatch and to rotate circularly as a whole under the driving of the power mechanism, so that uninterrupted circulating rescue is realized and rescue efficiency is improved.
In some embodiments, the first arm 30 is a telescopic structure. Specifically, a telescopic hydraulic cylinder can be selected, the cylinder body part of the hydraulic cylinder is connected with the top of the helicopter cabin, the telescopic rod of the hydraulic cylinder is telescopic in the helicopter cabin opening, the upper suspension wheel 41 is arranged at the outer end of the telescopic rod, and when rescue activities are not needed, the first arm support 30 can be retracted to enable the upper suspension wheel 41 to be retracted into the helicopter cabin. Further, as shown in fig. 2, in order to facilitate the arrangement of the boom 30, a hanger support is disposed on an inner wall near the top of the helicopter hatch, a hanger 12 is hinged to the hanger support, and the hanger 12 is used for hanging the first boom 30, wherein the hanger support is preferably detachably connected with the inner wall at the top of the helicopter hatch and can be detached when there is no rescue task.
In some embodiments, the second boom 441 may be flipped inward and outward relative to the helicopter hatch. The second arm support 441 only needs to turn outwards during rescue work, and when the second arm support 441 turns inwards back to the helicopter hatch and the first arm support 30 is in a retraction state, the helicopter hatch can be closed, and helicopter flight is not affected. It should be understood that the first arm support 30 may also adopt a structure that can be turned inwards and outwards relative to the helicopter hatch, the second arm support 441 may also adopt a structure that can be extended and retracted 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 be extended out of the helicopter hatch in a rescue state, and of course, the first arm support 30 and the second arm support 441 are preferably both structures that can be turned inwards and outwards relative to the helicopter hatch, so that the structure is simple, the occupied space is small, and the operation is convenient compared with a hydraulic extension and retraction mechanism.
The helicopter is when carrying out different tasks, receives the helicopter height of hovering and the restriction of rescue environment, and the ladder length of hanging that needs to hang must have the difference, to this, this embodiment will hang ladder body 20 and set up to can dismantle by a plurality of ladder units of hanging from the head to the tail and connect and form, and every ladder unit of hanging from the head is all rolled up and is established on a ladder spool 10 of hanging from the sun to can be according to the length of the high regulation ladder body of hanging from the sun of actual rescue 20. Further, the multiple hanging ladder units have multiple length specifications to achieve optimal length assembly.
When rescue is needed, as shown in fig. 2, the hanger 12, the upper support wheel set 42, the lower support wheel set 43, the second boom 441 and the second suspension wheel set 44 thereof are firstly installed in place, as shown in fig. 3, then the first boom 30 is installed, one end of the first boom 30 and the upper support wheel set 42 can share one installation support, according to rescue environments, a plurality of groups of suspension ladder units with suitable lengths are selected, firstly one group of suspension ladder units sequentially bypasses the upper support wheel set 42, the first suspension wheel set 41 and the lower support wheel set 43, then part of the suspension ladder units between the first suspension wheel set 41 and the lower support wheel set 43 bypasses the second suspension wheel set 44 and suspends between the first suspension wheel set 41 and the second suspension wheel set 44, and finally the rest groups of suspension ladder units are sequentially connected, as shown in fig. 4.
In some embodiments, the first hanging wheel set 41 includes first and second rollers axially spaced apart and in rolling engagement with the longitudinal cables 21 on both sides of the ladder body 20, respectively, and a gap between the first and second rollers allows the belt hook 80 and the belt to pass through.
A second rescue platform 51 is arranged below the first arm support 30 in the helicopter cabin, and the second rescue platform 51 may be a sliding plate arranged obliquely or a conveyor belt structure. Rescued persons are released below the first arm support 30 and fall on the second rescue platform 51, and then the rescued persons are conveyed by the second rescue platform 51 to avoid the position of the helicopter hatch, so that the rescued persons entering the hatch subsequently are not affected.
In this embodiment, the hanging ladder body 20 can rotate counterclockwise in the view angle of fig. 1, and the person to be rescued is in a supine hanging posture at the boom 30. It is of course also possible to control the rotation of the ladder body 20 in a counter-clockwise direction, as seen in fig. 6, when the rescued person is kneeling at the hatch. In this embodiment, it may not be necessary to provide a gap between the first and second rollers of the first suspension wheel set 41, since the rescued person does not have to pass the first suspension wheel set 41. If the person to be rescued is in a kneeling position at the cabin door, a first rescue platform 50 (not shown in the figure) can be padded at the bottom of the helicopter cabin and below the hanging ladder body 20, the first rescue platform 50 is preferably tightly attached to the lower part of the hanging ladder body and used for supporting the person to be rescued, the person to be rescued does not need to follow the hanging ladder body 20 to walk together, and the operation of unlocking the safety belt hook is easier.
As shown in fig. 5, a safety belt hook 80 is provided on the horizontal bar 22 of the hanging ladder body 20 to ensure the safety of the rescued person. As shown in fig. 7 and 8, the safety belt hook includes a hook body 81 and an anti-slip assembly; further, the middle part of couple body 81 is articulated with horizontal ladder pole 22, anticreep subassembly and horizontal ladder pole 22 fixed connection, and the anticreep subassembly is used for forming the cooperation of can opening and shutting with the couple body, is equipped with dog 70 in the top of hanging the ladder body, and dog 70 is used for forming conflict with the outside on couple body 81 upper portion at the in-process of hanging ladder body 20 circulating rotation.
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 811. The main function of hook 811 is to hook seat belt 91 and the main function of cam 812 is to engage stop 70 and rotate under the push of stop 70.
Further, the anticreep subassembly includes rotor 821 and pivoted wrist 822, one end and the horizontal ladder bar 22 fixed connection of rotor 821, the other end of rotor 821 is articulated with the one end of pivoted wrist 822, be connected with the reset spring between rotor 821 and the pivoted wrist 822, the reset spring is used for driving pivoted wrist 822 for rotor 821 orientation keep away from the direction rotation of couple body 81, be equipped with between rotor 821 and the pivoted wrist 822 and rotate limit structure, it is used for restricting the scope of pivoted wrist 822 for rotor 821 to keeping away from the direction rotation of couple body 81. Wherein, the rotating wrist 822 plays a role in facilitating the hanging of the safety belt 91 on the hook body 81 and avoiding the safety belt 91 from slipping out.
Referring to fig. 9A-9D, first, since the anti-slip assembly is fixedly connected to the transverse bar 22, when the automatic seat belt hook 80 is rotated from the hanging position to the horizontal position, an upward rotation of approximately 90 ° occurs (referring to the anti-slip assembly in fig. 9A-9D), and at this time, the opening of the hook body 81 is already opened to some extent. Then, as the escalator body 50 continues to rotate, the hook body 81 sequentially goes through at least four steps from 9A to 9D, where fig. 9A shows a state where the cam-shaped structure 812 just starts to hit the stopper 70, fig. 9B shows a state where the hook body 81 starts to rotate as the escalator body 50 rotates, fig. 9C shows a state where the hook body 81 continues to rotate and releases the safety belt 91 as the escalator body 50 rotates, and fig. 9D shows a state where the automatic safety belt hook 80 is separated from the stopper 70 after releasing the safety belt 91, thereby achieving automatic unlocking.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a helicopter hanging ladder for rescue, its characterized in that includes power unit, is the closed loop form hanging ladder body and is located second hanging wheelset, first hanging wheelset and a plurality of support wheelset in same longitudinal plane, the second hangs wheelset and stretches out through the second cantilever crane and set up in the helicopter hatch, first hanging wheelset stretches out through first cantilever crane and sets up in the helicopter hatch, and is a plurality of support wheelset sets up the inner wall in the helicopter cabin, the hanging ladder body in proper order with first hanging wheelset a plurality of support wheelsets and the second hangs wheelset roll cooperation and connects, is located first hanging wheelset with the second hangs the part between the wheelset the hanging ladder body is for dangling the form, power unit is used for driving the hanging ladder body circulation rotation.
2. A rescue helicopter suspension ladder as claimed in claim 1, characterized in that said first boom and/or said second boom are of a telescopic construction or are tiltable inwards and outwards with respect to the helicopter hatch.
3. The rescue helicopter boom ladder of claim 1, wherein the second suspension wheel set is extended out from the second boom and disposed at the bottom of a helicopter hatch, the first suspension wheel set is extended out from the first boom and disposed at the top of the helicopter hatch, and the extended distance of the first suspension wheel set is greater than the extended distance of the second suspension wheel set.
4. A rescue helicopter hanging ladder as claimed in claim 3, wherein a first rescue platform is padded at the bottom of the helicopter cabin and below the hanging ladder body.
5. The rescue helicopter suspension ladder of claim 3, wherein the first suspension wheel set comprises first and second rollers axially spaced apart and connected with longitudinal cables on two sides of the suspension ladder body in a rolling fit manner.
6. A rescue helicopter suspension ladder as claimed in claim 5, wherein a second rescue platform is located within the helicopter nacelle and below the first boom.
7. The rescue helicopter hanging ladder of claim 5, wherein a safety belt hook is arranged on the transverse ladder rod of the hanging ladder body, the safety belt hook comprises a hook body and an anti-dropping component, the middle part of the hook body is hinged with the transverse ladder rod, the anti-dropping component is fixedly connected with the transverse ladder rod, the anti-dropping component is used for forming openable and closable fit with the hook body, a stop block is arranged above the hanging ladder body, and the stop block is used for forming collision with the outer side of the upper part of the hook body in the circulating rotation process of the hanging ladder body.
8. The rescue helicopter hanging ladder according to claim 3, wherein a hanger support is provided on the inner wall near the top of the helicopter hatch, and a hanger is hinged to the hanger support and used for hanging the first boom.
9. A rescue helicopter hanging ladder according to any one of claims 1 to 8 wherein said hanging ladder body is formed by detachably connecting a plurality of hanging ladder units end to end.
10. A rescue helicopter suspension ladder as claimed in claim 9, wherein a plurality of said suspension ladder units have a plurality of length specifications.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811270245.0A CN111099009A (en) | 2018-10-29 | 2018-10-29 | Helicopter hanging ladder for rescue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811270245.0A CN111099009A (en) | 2018-10-29 | 2018-10-29 | Helicopter hanging ladder for rescue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111099009A true CN111099009A (en) | 2020-05-05 |
Family
ID=70419880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811270245.0A Pending CN111099009A (en) | 2018-10-29 | 2018-10-29 | Helicopter hanging ladder for rescue |
Country Status (1)
| Country | Link |
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| CN (1) | CN111099009A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6845844B1 (en) * | 1999-09-21 | 2005-01-25 | Kevin David Williams | Fire escape apparatus |
| CN2850644Y (en) * | 2005-12-27 | 2006-12-27 | 刘煜 | Reciprocating slide type retreating device for life-saving |
| CN201620750U (en) * | 2010-04-08 | 2010-11-03 | 华中农业大学 | Multifunctional fixing device used for high-altitude rescue |
| CN102659022A (en) * | 2012-05-02 | 2012-09-12 | 中联重科股份有限公司 | Lifting hook and crane with same |
| CN105083526A (en) * | 2015-09-08 | 2015-11-25 | 天津市天舞科技有限公司 | Special fire rescue ladder for helicopter |
| CN207813487U (en) * | 2017-12-02 | 2018-09-04 | 解传鑫 | A kind of high-rise building fire ladder for escaping |
| CN108569610A (en) * | 2017-03-10 | 2018-09-25 | 吴结华 | A kind of more cage circulating elevators |
| CN209097005U (en) * | 2018-10-29 | 2019-07-12 | 中铁第五勘察设计院集团有限公司 | Rescue rotorcraft hanging ladder |
-
2018
- 2018-10-29 CN CN201811270245.0A patent/CN111099009A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6845844B1 (en) * | 1999-09-21 | 2005-01-25 | Kevin David Williams | Fire escape apparatus |
| CN2850644Y (en) * | 2005-12-27 | 2006-12-27 | 刘煜 | Reciprocating slide type retreating device for life-saving |
| CN201620750U (en) * | 2010-04-08 | 2010-11-03 | 华中农业大学 | Multifunctional fixing device used for high-altitude rescue |
| CN102659022A (en) * | 2012-05-02 | 2012-09-12 | 中联重科股份有限公司 | Lifting hook and crane with same |
| CN105083526A (en) * | 2015-09-08 | 2015-11-25 | 天津市天舞科技有限公司 | Special fire rescue ladder for helicopter |
| CN108569610A (en) * | 2017-03-10 | 2018-09-25 | 吴结华 | A kind of more cage circulating elevators |
| CN207813487U (en) * | 2017-12-02 | 2018-09-04 | 解传鑫 | A kind of high-rise building fire ladder for escaping |
| CN209097005U (en) * | 2018-10-29 | 2019-07-12 | 中铁第五勘察设计院集团有限公司 | Rescue rotorcraft hanging ladder |
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