CN111591448B - Counterweight ball with ejector rod for helicopter hoisting operation - Google Patents
Counterweight ball with ejector rod for helicopter hoisting operation Download PDFInfo
- Publication number
- CN111591448B CN111591448B CN202010485759.9A CN202010485759A CN111591448B CN 111591448 B CN111591448 B CN 111591448B CN 202010485759 A CN202010485759 A CN 202010485759A CN 111591448 B CN111591448 B CN 111591448B
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- hemisphere
- hole
- threaded
- radial groove
- anchor ear
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- 238000000034 method Methods 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D9/00—Equipment for handling freight; Equipment for facilitating passenger embarkation or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D1/00—Dropping, ejecting, releasing, or receiving articles, liquids, or the like, in flight
- B64D1/02—Dropping, ejecting, or releasing articles
- B64D1/08—Dropping, ejecting, or releasing articles the articles being load-carrying devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U2101/00—UAVs specially adapted for particular uses or applications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Walking Sticks, Umbrellas, And Fans (AREA)
Abstract
The invention provides a counterweight ball with a push rod for helicopter hoisting operation, which comprises the following components: the main hemisphere is provided with a first radial groove and a first jacking threaded through hole, the first radial groove is arranged at the bottom surface of the main hemisphere, one end of the first jacking threaded through hole is arranged at the arc surface of the main hemisphere, and the other end of the first jacking threaded through hole is communicated with the first radial groove; the auxiliary hemisphere is detachably connected with the main hemisphere, the auxiliary hemisphere is provided with a second radial groove and a second jacking threaded through hole, the second radial groove is formed in the bottom surface of the auxiliary hemisphere, one end of the second jacking threaded through hole is arranged in the arc-shaped surface of the auxiliary hemisphere, the other end of the second jacking threaded through hole is communicated with the second radial groove, and the first radial groove and the second radial groove are matched to form a radial through groove for accommodating a sling; the jacking assembly is arranged in the first jacking threaded through hole and/or the second jacking threaded through hole, and can be abutted with the sling. The invention can improve the operation safety of the helicopter sling method.
Description
Technical Field
The invention relates to a counterweight ball with a mandril for helicopter hoisting operation.
Background
With the improvement of the technical means along with the rise of the voltage level, the helicopter has larger and deeper operation range and operation depth of electric power operation, and more participates in the construction, operation and maintenance of the power grid, so that new operation modes are generated.
The helicopter sling method is a common operation mode of the helicopter participating in electric power operation at present. The sling hangs materials and personnel to the appointed position and then unhooks, and the helicopter flies off, and after unhooking, the helicopter flying speed is very fast because of lacking weight, and the sling has the danger of being rolled into the tail rotor, however, the foreign matter is rolled into the tail rotor and is fatal to the helicopter.
At present, the heavy objects in the field are generally hung on slings. There are many hazards due to the randomness of the weights.
1) The heavy object is difficult to connect with the sling, and the heavy object on the construction site is generally not provided with a special interface and is difficult to connect with the sling.
2) The rope is not firmly connected with the sling, the rope is easy to fall to hurt people, the counterweight effect is lost, and new danger is brought.
3) The windage of heavy object is great, not only can not play the counter weight effect, on the contrary because of receiving windage effect with the hoist cable lift, causes the danger.
4) The weight is not easy to control, the lifting weight of the helicopter is influenced by the overweight of the counterweight, and the danger of being involved in the tail rotor still exists due to the overweight of the counterweight.
5) The edges and corners of the weight are obvious and can be used for wearing or cutting slings.
6) The heavy objects sharply hurt the site staff or hurt the wires.
7) When the helicopter sling method live working is carried out, the heavy objects do not meet the requirement of insulating property, and discharge is caused.
Disclosure of Invention
The invention provides a counterweight ball with a push rod for helicopter hoisting operation, which aims to improve the operation safety of a helicopter hoisting rope method.
The technical scheme adopted for solving the technical problems is as follows: a counterweight ball for helicopter hoisting operations comprising a ram, comprising: the main hemisphere is provided with a first radial groove and a first jacking threaded through hole, the first radial groove is arranged at the bottom surface of the main hemisphere, one end of the first jacking threaded through hole is arranged at the arc surface of the main hemisphere, and the other end of the first jacking threaded through hole is communicated with the first radial groove; the auxiliary hemisphere is detachably connected with the main hemisphere, the auxiliary hemisphere is provided with a second radial groove and a second jacking threaded through hole, the second radial groove is formed in the bottom surface of the auxiliary hemisphere, one end of the second jacking threaded through hole is arranged in the arc-shaped surface of the auxiliary hemisphere, the other end of the second jacking threaded through hole is communicated with the second radial groove, and the first radial groove and the second radial groove are matched to form a radial through groove for accommodating a sling; the jacking assembly is arranged in the first jacking threaded through hole and/or the second jacking threaded through hole, and can be abutted with the sling.
Further, the bottom surface of main hemisphere is provided with the boss, and the bottom surface of auxiliary hemisphere is provided with the recess, boss and recess grafting cooperation.
Further, a plurality of fixed thread through holes are formed in the main hemisphere, a plurality of fixed thread matching holes are formed in the auxiliary hemisphere, and the fixed thread matching holes are matched with the fixed thread through holes in a one-to-one correspondence mode.
Further, the plurality of fixing thread through holes are symmetrically arranged on two sides of the first radial groove, and the plurality of fixing thread matching holes are symmetrically arranged on two sides of the second radial groove.
Further, the main hemisphere is provided with at least one first tight screw thread through hole in top, and the auxiliary hemisphere is provided with at least two tight screw thread through holes in top of second, and the tight screw thread through hole in top of first top and the tight screw thread through hole in top of second all parallel dislocation setting.
Further, both ends of the radial through groove are provided with chamfers.
Further, the counterweight ball with the ejector rod in helicopter hoisting operation further comprises two anti-slip anchor clamps, each anti-slip anchor clamp is connected with a sling, and the two anti-slip anchor clamps are arranged at the outer sides of two ends of the radial through groove at intervals.
Further, the anti-slip anchor ear comprises an upper anchor ear and a lower anchor ear, the upper anchor ear and the lower anchor ear are in a semi-ring shape, one end of the upper anchor ear is hinged with one end of the lower anchor ear, and the other end of the upper anchor ear is detachably connected with the other end of the lower anchor ear.
Further, the inner ring of the upper hoop and the inner ring of the lower hoop are both provided with rubber layers.
Further, the other end of the upper anchor ear is detachably connected with the other end of the lower anchor ear through a limit bolt.
The invention has the advantages that the ball body is adopted as the counterweight device for the sling method operation, the streamline is good, the wind resistance coefficient is low, and the ball body is of an electrodeless structure, can not obviously deflect to a certain direction in use, and can improve the operation safety of the helicopter sling method.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a schematic view of a structure of a counterweight ball with a ram for helicopter hoisting operations in an embodiment of the invention;
FIG. 2 is a schematic diagram of the structure of the main hemisphere;
FIG. 3 is a schematic structural view of a secondary hemisphere;
Fig. 4 is a schematic structural view of an anti-slip anchor;
Fig. 5 is a schematic diagram of a connection structure between the main hemisphere and the sling.
Reference numerals in the drawings: 1. a primary hemisphere; 11. a first radial slot; 12. a first tightening threaded through hole; 13. fixing the threaded through hole; 2. a secondary hemisphere; 21. a second radial slot; 22. a second tightening threaded through hole; 23. fixing the threaded matching hole; 3. an anti-slip anchor ear; 31. an upper hoop; 32. a lower hoop; 4. an insulating rubber cushion layer; 5. slings are provided.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1 to 5, the embodiment of the invention provides a counterweight ball with a mandril for helicopter hoisting operation, which comprises a main hemisphere 1, a subsidiary hemisphere 2 and a jacking component. The main hemisphere 1 is provided with first radial groove 11 and first tight screw thread through-hole 12 in top, and first radial groove 11 sets up in the bottom surface department of main hemisphere 1, and the arcwall face department of main hemisphere 1 is arranged in to the one end of first tight screw thread through-hole 12, and the other end and the first radial groove 11 intercommunication of first tight screw thread through-hole 12. The auxiliary hemisphere 2 is detachably connected with the main hemisphere 1, the auxiliary hemisphere 2 is provided with a second radial groove 21 and a second jacking threaded through hole 22, the second radial groove 21 is formed in the bottom surface of the auxiliary hemisphere 2, one end of the second jacking threaded through hole 22 is arranged in the arc surface of the auxiliary hemisphere 2, the other end of the second jacking threaded through hole 22 is communicated with the second radial groove 21, and the first radial groove 11 and the second radial groove 21 are matched to form a radial through groove for accommodating the sling 5. The jacking components are arranged in the first jacking threaded through hole 12 and/or the second jacking threaded through hole 22, and the jacking components can be abutted with the sling 5.
The ball body is adopted as a counterweight device for the sling method operation, the streamline is good, the wind resistance coefficient is low, and the ball body is of an electrodeless structure, so that the ball body cannot be obviously deflected to a certain direction in use, and the purpose of improving the operation safety of the helicopter sling method can be achieved.
The jacking component is connected with the sling 5, and the purpose is to fix the position of the sling 5 and a counterweight ball formed by the main hemisphere 1 and the auxiliary hemisphere 2 through the jacking component, so that the sling 5 and the counterweight ball are prevented from sliding relatively. The first radial groove 11 and the second radial groove 21 are grooves of a through diameter. In this embodiment, the tightening assembly includes an insulating ejector rod and a bolt body, the insulating ejector rod is slidably disposed in the first tightening threaded through hole 12 and/or the second tightening threaded through hole 22, and the bolt body can eject the insulating ejector rod along the axial direction of the first tightening threaded through hole 12 and/or the second tightening threaded through hole 22 and is abutted against the sling 5.
The bottom surface of main hemisphere 1 is provided with the boss, and the bottom surface of auxiliary hemisphere 2 is provided with the recess, boss and recess grafting cooperation. The main hemisphere 1 is provided with a cylindrical boss, the auxiliary hemisphere 2 is provided with a cylindrical groove, the main hemisphere 1 is heavy, the auxiliary hemisphere 2 is light, the load of a connecting piece can be effectively reduced, and the stability is improved. In addition, the contact area between the main hemisphere 1 and the auxiliary hemisphere 2 is increased, and the assembly effect is better.
In this embodiment, a plurality of fixing threaded through holes 13 are provided on the main hemisphere 1, a plurality of fixing threaded mating holes 23 are provided on the auxiliary hemisphere 2, and the plurality of fixing threaded mating holes 23 are mated with the plurality of fixing threaded through holes 13 in a one-to-one correspondence. The main hemisphere 1 and the auxiliary hemisphere 2 are fixed by fixing bolts through the fixing screw thread matching holes 23 and the fixing screw thread through holes 13, so that the main hemisphere 1 and the auxiliary hemisphere 2 form a complete sphere.
Preferably, the plurality of fixing screw through holes 13 are symmetrically disposed at both sides of the first radial groove 11, and the plurality of fixing screw coupling holes 23 are symmetrically disposed at both sides of the second radial groove 21. The fixing threaded through hole 13 and the fixing threaded matching hole 23 are arranged according to the arrangement mode, so that the connection of the whole device is more stable and the stress is more uniform.
As shown in fig. 2 and 3, the main hemisphere 1 is provided with at least one first tight threaded through hole 12, the auxiliary hemisphere 2 is provided with at least two second tight threaded through holes 22, and the first tight threaded through hole 12 and the second tight threaded through holes 22 are all arranged in parallel and in a staggered manner. The purpose of arranging the first jacking threaded through hole 12 and the second jacking threaded through hole 22 in parallel and staggered manner is to increase the contact point position of the jacking component and the sling 5, so that the sling 5 is not easy to fall off.
Both ends of the radial through groove are provided with chamfers, namely, both upper and lower ends of the first radial groove 11 and the second radial groove 21 are provided with chamfers, so that scratches and abrasion of the sling 5 can be avoided.
As shown in fig. 1, the counterweight ball with the ejector rod in helicopter hoisting operation further comprises two anti-slip anchor clamps 3, each anti-slip anchor clamp 3 is connected with a sling 5, and the two anti-slip anchor clamps 3 are arranged outside two ends of the radial through groove at intervals. The anti-slip anchor ear 3 is arranged to limit the up-and-down sliding of the counterweight ball, so as to prevent the counterweight ball from falling off from the sling 5.
As shown in fig. 4, the anti-slip anchor ear 3 includes an upper anchor ear 31 and a lower anchor ear 32, the upper anchor ear 31 and the lower anchor ear 32 are all semi-annular, a space for accommodating the sling 5 is formed between the upper anchor ear 31 and the lower anchor ear 32, one end of the upper anchor ear 31 is hinged with one end of the lower anchor ear 32, and the other end of the upper anchor ear 31 is detachably connected with the other end of the lower anchor ear 32. The during operation is opened the other end of going up staple bolt 31 with the other end of lower staple bolt 32, makes hoist cable 5 arrange in anti-skidding staple bolt 3 inside, and is fixed the other end of going up staple bolt 31 with lower staple bolt 32 again, makes anti-skidding staple bolt 3 press from both sides tight hoist cable 5 and reaches spacing effect.
Preferably, the inner ring of the upper hoop 31 and the inner ring of the lower hoop 32 are both provided with rubber layers. The friction force between the anti-skid anchor ear 3 and the sling 5 can be increased by arranging the rubber layer, so that the limiting effect is firmer. In the embodiment, the outside of the connecting section of the sling 5 opposite to the counterweight ball is coated with the insulating rubber cushion layer 4, so that the connecting friction between the anti-skid anchor ear 3 and the sling 5 can be increased. Of course, when the diameter of the sling 5 is changed, the insulating rubber cushion layers 4 with different thicknesses can be selected, so that the sling 5 is always tightly and reliably matched with the counterweight ball.
In this embodiment, the other end of the upper hoop 31 is detachably connected to the other end of the lower hoop 32 by a limit bolt or an anti-disengagement joint. The other end of the upper hoop 31 and the other end of the lower hoop 32 can be prevented from falling off from the bolts after the nuts are loosened by arranging the limit bolts, so that falling danger of the device is avoided.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
The ball body is adopted as a counterweight device for sling method operation, the streamline is good, the wind resistance coefficient is low, and the ball body is of an electrodeless structure and cannot deflect obviously in a certain direction in use.
The bolt matching is mainly used, the anti-slip anchor ear fixing and the concave-convex table matching are used as auxiliary materials, multiple protection is achieved, and connection reliability is ensured.
The anti-slip anchor ear can effectively prevent the counterweight ball from sliding up and down, and the anti-slip anchor ear is provided with an anti-slip joint, so that the nut can be prevented from falling off after loosening.
When the diameter of the rope is changed, insulating rubber pads with different thicknesses can be selected, so that the matching is always tight and reliable.
The sling method counterweight ball can provide powerful support for the flight safety of the helicopter, ensures that the sling does not swing or swing with small amplitude along with wind in the flight process, is beneficial to the helicopter to avoid the occurrence of the accident that the sling hits the tail stock in the flight, and improves the operation safety of the sling method of the helicopter.
The foregoing description of the embodiments of the invention is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention shall fall within the scope of the patent. In addition, the technical characteristics and technical scheme, technical characteristics and technical scheme can be freely combined for use.
Claims (8)
1. A counterweight ball with a mandril for helicopter hoisting operation, comprising:
The main hemisphere (1) is provided with a first radial groove (11) and a first jacking threaded through hole (12), the first radial groove (11) is arranged at the bottom surface of the main hemisphere (1), one end of the first jacking threaded through hole (12) is arranged at the arc surface of the main hemisphere (1), and the other end of the first jacking threaded through hole (12) is communicated with the first radial groove (11);
The auxiliary hemisphere (2) is detachably connected with the main hemisphere (1), the auxiliary hemisphere (2) is provided with a second radial groove (21) and a second tightening threaded through hole (22), the second radial groove (21) is formed in the bottom surface of the auxiliary hemisphere (2), one end of the second tightening threaded through hole (22) is arranged in the arc-shaped surface of the auxiliary hemisphere (2), the other end of the second tightening threaded through hole (22) is communicated with the second radial groove (21), and the first radial groove (11) and the second radial groove (21) are matched to form a radial through groove for accommodating the sling (5);
the jacking component is arranged in the first jacking threaded through hole (12) and/or the second jacking threaded through hole (22), and can be abutted with the sling (5);
a boss is arranged on the bottom surface of the main hemisphere (1), a groove is arranged on the bottom surface of the auxiliary hemisphere (2), and the boss is in plug-in fit with the groove;
A plurality of fixing thread through holes (13) are formed in the main hemisphere (1), a plurality of fixing thread matching holes (23) are formed in the auxiliary hemisphere (2), and the fixing thread matching holes (23) are matched with the fixing thread through holes (13) in a one-to-one correspondence mode.
2. The counterweight ball with the ejector rod for helicopter hoisting operation according to claim 1, wherein a plurality of fixing thread through holes (13) are symmetrically arranged at two sides of the first radial groove (11), and a plurality of fixing thread matching holes (23) are symmetrically arranged at two sides of the second radial groove (21).
3. The counterweight ball with the ejector rod for helicopter hoisting operation according to claim 1, characterized in that the main hemisphere (1) is provided with at least one first jacking threaded through hole (12), the auxiliary hemisphere (2) is provided with at least two second jacking threaded through holes (22), and the first jacking threaded through holes (12) and the second jacking threaded through holes (22) are arranged in parallel dislocation.
4. The helicopter hoisting method operation of the counterweight ball with the ejector rod according to claim 1, wherein both ends of the radial through groove are provided with chamfers.
5. The counterweight ball with the ejector rod for helicopter hoisting operation according to claim 1, wherein the counterweight ball with the ejector rod for helicopter hoisting operation further comprises two anti-slip anchor clamps (3), each anti-slip anchor clamp (3) is connected with a sling (5), and the two anti-slip anchor clamps (3) are arranged at the outer sides of two ends of the radial through groove at intervals.
6. The counterweight ball with the ejector rod for helicopter hoisting operation according to claim 5, wherein the anti-slip anchor ear (3) comprises an upper anchor ear (31) and a lower anchor ear (32), the upper anchor ear (31) and the lower anchor ear (32) are semi-annular, one end of the upper anchor ear (31) is hinged with one end of the lower anchor ear (32), and the other end of the upper anchor ear (31) is detachably connected with the other end of the lower anchor ear (32).
7. The counterweight ball with the ejector rod for helicopter hoisting operation as claimed in claim 6, wherein the inner ring of the upper hoop (31) and the inner ring of the lower hoop (32) are both provided with rubber layers.
8. The counterweight ball with the ejector rod for helicopter hoisting operation as claimed in claim 6, wherein the other end of the upper hoop (31) is detachably connected with the other end of the lower hoop (32) through a limit bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010485759.9A CN111591448B (en) | 2020-06-01 | 2020-06-01 | Counterweight ball with ejector rod for helicopter hoisting operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010485759.9A CN111591448B (en) | 2020-06-01 | 2020-06-01 | Counterweight ball with ejector rod for helicopter hoisting operation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111591448A CN111591448A (en) | 2020-08-28 |
| CN111591448B true CN111591448B (en) | 2024-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010485759.9A Active CN111591448B (en) | 2020-06-01 | 2020-06-01 | Counterweight ball with ejector rod for helicopter hoisting operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111591448B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2073562A (en) * | 1980-04-12 | 1981-10-21 | Rowe A E | Fishing tackle |
| JP2001260992A (en) * | 2000-03-22 | 2001-09-26 | Koyo:Kk | Airborne advertisement body |
| JP2003081572A (en) * | 2001-09-11 | 2003-03-19 | Hitachi Constr Mach Co Ltd | Crane hook |
| CN207712308U (en) * | 2017-11-29 | 2018-08-10 | 中国直升机设计研究所 | A kind of helicopter flag hanging device |
| JP2020026270A (en) * | 2019-10-10 | 2020-02-20 | 株式会社エアロネクスト | Rotary wing aircraft |
| CN212313888U (en) * | 2020-06-01 | 2021-01-08 | 国网通用航空有限公司 | Counter weight ball containing ejector rod for helicopter hoisting operation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6431931B2 (en) * | 2000-06-21 | 2002-08-13 | Dale Johnson | Reversible weighted float |
-
2020
- 2020-06-01 CN CN202010485759.9A patent/CN111591448B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2073562A (en) * | 1980-04-12 | 1981-10-21 | Rowe A E | Fishing tackle |
| JP2001260992A (en) * | 2000-03-22 | 2001-09-26 | Koyo:Kk | Airborne advertisement body |
| JP2003081572A (en) * | 2001-09-11 | 2003-03-19 | Hitachi Constr Mach Co Ltd | Crane hook |
| CN207712308U (en) * | 2017-11-29 | 2018-08-10 | 中国直升机设计研究所 | A kind of helicopter flag hanging device |
| JP2020026270A (en) * | 2019-10-10 | 2020-02-20 | 株式会社エアロネクスト | Rotary wing aircraft |
| CN212313888U (en) * | 2020-06-01 | 2021-01-08 | 国网通用航空有限公司 | Counter weight ball containing ejector rod for helicopter hoisting operation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111591448A (en) | 2020-08-28 |
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Address after: 102209 7th floor, block C, No.18, Binhe Avenue, future science and Technology City, Changping District, Beijing Applicant after: State Grid Power Space Technology Co.,Ltd. Address before: 102209 7th floor, block C, No.18, Binhe Avenue, future science and Technology City, Changping District, Beijing Applicant before: SGCC GENERAL AVIATION Co.,Ltd. |
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