CN219384702U - Hydraulic working ladder for airplane - Google Patents
Hydraulic working ladder for airplane Download PDFInfo
- Publication number
- CN219384702U CN219384702U CN202320138279.4U CN202320138279U CN219384702U CN 219384702 U CN219384702 U CN 219384702U CN 202320138279 U CN202320138279 U CN 202320138279U CN 219384702 U CN219384702 U CN 219384702U
- Authority
- CN
- China
- Prior art keywords
- platform
- ladder
- extension
- frame
- working
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- Ladders (AREA)
Abstract
The utility model relates to the technical field of hydraulic lifting platforms, in particular to a hydraulic working ladder for an airplane, which comprises a bottom frame, a lifting mechanism, a working platform and a ladder frame, wherein the lifting mechanism is arranged on the bottom frame; the lifting mechanism is arranged between the underframe and the working platform to adjust the lifting height of the working platform; the ladder frame is arranged between the underframe and the working platform for an operator to go up and down the working platform; the lifting mechanism is a scissor type lifter; the working platform comprises a fixed platform and an extension platform, wherein the extension platform is assembled on the fixed platform in a reciprocating sliding manner along the front-back direction, and the extension platform slides along the front end to increase the length of the fixed platform. The utility model provides a hydraulic working ladder which can basically meet the lifting height requirement of aircraft maintenance and can be close to the inaccessible part of the aircraft maintenance; when maintenance personnel maintain the aircraft, the working ladder does not need to be replaced frequently, and the working efficiency can be improved.
Description
Technical Field
The utility model relates to the technical field of hydraulic lifting platforms, in particular to a hydraulic working ladder for an airplane.
Background
Aviation maintenance refers to maintenance and repair of an aircraft and technical equipment on the aircraft, ensures the flight safety of the aircraft, is a precondition and a necessary condition for the use of the aircraft, and is also an important component of the aviation industry.
Aviation maintenance work requires access to various parts of the aircraft by maintenance personnel, who are often required to perform the maintenance work by means of a work ladder.
However, as the heights of different parts of the aircraft are greatly different, the lifting mechanism of the common lifting working ladder cannot meet the lifting height requirement required by aircraft maintenance. Moreover, the common elevator is difficult to approach to part of the aircraft, such as the wing roots, and often cannot approach the wing roots due to the blocking of the fuselage. Therefore, maintenance work is generally performed by a fixed height working ladder for aircraft maintenance inaccessible locations. In this way, when performing actual maintenance, a serviceman needs to frequently replace the working ladder to approach each part of the aircraft, and needs to continuously go up and down the working ladder, which results in lower maintenance efficiency of the aircraft.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides the hydraulic working ladder which can basically meet the requirement of the aircraft on the maintenance lifting height, so that a maintenance person does not need to frequently replace the working ladder when maintaining the aircraft, and the working efficiency can be improved.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
a hydraulic working ladder for an aircraft comprises an underframe, a lifting mechanism, a fixed platform, an extension platform and a ladder frame; the lifting mechanism is arranged between the underframe and the working platform to adjust the lifting height of the working platform; the ladder frame is arranged between the underframe and the working platform for an operator to go up and down the working platform;
the lifting mechanism is a scissor type lifter;
the working platform comprises a fixed platform and an extension platform, wherein the extension platform is assembled on the fixed platform in a reciprocating sliding manner along the front-back direction, and the extension platform slides along the front end to increase the length of the fixed platform.
The additionally arranged extension platform can meet the functional requirement of the aircraft for maintaining wing roots. The wing roots of the wing can not be maintained through the common working ladder in the past, and the utility model can be maintained without changing the working ladder by additionally arranging the slidable extension platform on the fixed platform so as to increase the length of the fixed working platform, thereby having higher efficiency.
The lifting mechanism adopts the scissor type lifter, so that the lifting height can be easily met, and the occupied space is small; the folding structure is stable in lifting and stable in lifting process; the scissors are firm in structure, small in gap and free from shaking in the ascending process.
As a preferable technical scheme of the utility model, the lifting mechanism is a secondary scissor type lifter; the lifting mechanism comprises a primary shearing fork support, a secondary shearing fork support and a hydraulic cylinder, wherein the hydraulic cylinder performs reciprocating motion to drive the primary shearing fork support and the secondary shearing fork support to open and close so as to realize lifting of the fixed platform and the extension platform.
The lifting height of the two-stage scissor bracket just can meet the height requirements of mounting the aircraft foil strip bullet and maintaining the wing root, the front edge and the wing tip radome of the wing.
As a preferable technical scheme of the utility model, the underframe comprises a frame and extension arms, wherein the two extension arms are symmetrically arranged at the front end of the frame, the length of the frame is consistent with the length of the fixed platform, and the length of the extension arm is longer than the longest extension length of the extension platform so as to enable the working ladder to be more stable.
As a preferable technical scheme of the utility model, the underframe is provided with pulleys, the pulleys are arranged at the front end of the extension arm and the rear end of the frame, and the rear end pulley of the frame is provided with a locking mechanism for locking the pulleys.
As a preferred embodiment of the utility model, the frame is provided with feet for fixing the underframe, and the distance between the extension arms is larger than the diameter of the aircraft wheel. When the aircraft is maintained, two extension arms of the hydraulic working ladder can be arranged on two sides of the aircraft wheel. The arrangement of the extension arm not only enables the working ladder to approach different parts of the aircraft according to operation requirements; and the hydraulic working ladder is more stable, the risk of side turning caused by the gravity center deviation of the hydraulic working ladder can be prevented, and the high-altitude operation is safer.
As a preferable technical scheme of the utility model, the ladder frame comprises an upper ladder and a lower ladder, wherein the lower ladder is fixedly connected with the underframe, and the upper ladder is fixedly connected with the fixed platform; when the scissor supports of the lifting mechanism are combined, a gap between the lower ladder and the underframe can accommodate the upper ladder.
As a preferable technical scheme of the utility model, the fixed platform is provided with a roller mounting seat, and the roller mounting seat is provided with rollers.
As a preferable technical scheme of the utility model, the extension platform comprises a frame, a guide rail, a panel and a turning plate, wherein the front end of the frame is riveted with the panel, the rear end of the frame is provided with the turning plate, and the turning plate is hinged with the panel through a hinge; the frame below fixedly connected with guide rail, the guide rail with set up the gyro wheel on the fixed platform suits the assembly. The sliding connection of the guide rail and the roller realizes that the extension platform can slide back and forth on the fixed platform along the front and back directions.
As a more preferable technical scheme of the utility model, the end part of the guide rail is provided with a positioning block for preventing the roller from sliding out of the guide rail.
As a preferable technical scheme of the utility model, the front ends of the fixed platform and the extension platform are provided with anti-collision strips. The anti-collision strip can prevent the fixed platform or the extension platform from colliding with the aircraft shell when in use, and the anti-collision strip can protect the aircraft shell from being damaged.
As a preferable technical scheme of the utility model, the extension platform is further provided with a limiting pin, the fixed platform is provided with a limiting hole, and the limiting pin is matched with the limiting hole to limit the extension platform.
As a preferable technical scheme of the utility model, the fixed platform is provided with a fixed platform guardrail, the extension platform is provided with an extension platform guardrail, and the fixed platform guardrail is foldable; the guardrail comprises an extension platform frame, and is characterized in that a guardrail seat is arranged on the extension platform frame, a stand column is arranged on the extension platform guardrail in a penetrating manner, and a knob plunger is arranged on the guardrail seat to lock the stand column so as to realize height adjustment of the guardrail.
The beneficial effects are that:
1. the hydraulic working ladder solves the problem that the existing working ladder needs to be replaced when approaching different parts of an aircraft, can basically meet the requirement of the aircraft on maintenance lifting height, can approach to the parts which are difficult to approach for aircraft maintenance, does not need to be replaced frequently when maintenance personnel maintain the aircraft, and can greatly improve the working efficiency.
2. According to the utility model, the elevator mechanism with the two-stage scissor bracket is arranged, so that the requirements of different heights for aircraft maintenance can be just met; the length of the working platform is increased by arranging a slidable extension platform; the two symmetrically arranged extension arms are arranged on the underframe of the hydraulic working ladder, so that the working ladder can approach different parts of the aircraft according to operation requirements, such as wing roots which are difficult to approach by a common working ladder; the extension arm length is longer than extension platform's longest extension length's setting, can make hydraulic pressure work ladder more stable, prevents that the staff from turning on one's side because of focus skew results in the operation on the extension platform of expansion, makes high altitude construction safer.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic view of the hydraulic ladder of the present utility model in an extended configuration;
FIG. 2 is a schematic top view of FIG. 1;
FIG. 3 is a schematic view of the structure of the hydraulic ladder of the present utility model in a contracted state;
FIG. 4 is a schematic diagram of the front view structure of FIG. 3;
FIG. 5 is a schematic structural view of a stationary platform;
fig. 6 is a schematic structural view of the extension platform.
Reference numerals illustrate: 1. a chassis; 11. a frame; 12. an extension arm; 13. a pulley; 14. a bracket; 15. a support leg; 2. a lifting mechanism; 21. a hydraulic cylinder; 22. a first-stage scissors support; 23. a secondary scissors support; 3. a fixed platform; 31. a roller mounting seat; 32. a guardrail joint; 4. an extension platform; 42. turning plate; 43. a limiting pin; 44. foot pedals; 5. a ladder frame; 51. ascending a ladder; 52. descending a ladder; 6. a bumper strip; 7. fixing a platform guard rail; 8. extending a platform guard rail; 81. a column; 9. a traction rod; 10. and a slideway.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all equivalent structures or equivalent flow changes made by the content of the specification and the drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the protection scope of the present utility model.
Example 1:
the hydraulic working ladder for the airplane comprises a bottom frame 1, a lifting mechanism 2, a fixed platform 3, an extension platform 4 and a ladder frame 5, wherein the hydraulic working ladder is shown in figures 1-4.
The underframe 1 comprises a frame 11, an extension arm 12, a pulley 13 and a support leg 15. The frame 11 is a cubic frame, and the front end of the frame 11 is provided with laterally symmetrical extension arms 12. The length of the frame 11 is consistent with that of the fixed platform 3, and the length of the extension arm 12 is longer than the longest extension length of the extension platform 4 so as to make the hydraulic working ladder more stable. The chassis 1 is provided with a pulley 13, the pulley 13 is arranged at the front end of the extension arm 12 and the rear end of the frame 11, and a locking mechanism is arranged on the pulley 13 at the rear end of the frame and used for locking the pulley 13. The rear end of the frame 11 is provided with a traction rod 9 which can operate two pulleys 13 at the rear end of the frame to steer. Two legs 15 are provided on each of the left and right sides of the frame 11 for fixing the underframe 1.
Slide ways 10 are arranged at corresponding positions of the upper end of the frame 11 and the lower end of the fixed platform 3.
The lifting mechanism 2 is a secondary scissor lift and comprises a primary scissor bracket 22, a secondary scissor bracket 23 and a hydraulic cylinder 21. The hydraulic cylinder 21 is arranged between the primary shearing fork support 22 and the secondary shearing fork support 23, one side end of the primary shearing fork support 22 and one side end of the secondary shearing fork support 23 are provided with pulleys, and the pulleys are arranged in the slide way 10. The hydraulic cylinder 21 reciprocates to drive the first-stage scissor bracket 22 and the second-stage scissor bracket 23 to open and close to realize lifting movement, and when the scissor bracket is opened, the pulley at the end part of the scissor bracket slides in the slideway 10.
As shown in fig. 5, the fixed platform 3 comprises a frame and a panel, the panel is riveted on the frame, a roller mounting seat 31 is arranged on the frame, and rollers are assembled on the roller mounting seat 31.
The extension platform 4 is reciprocally slidably fitted to the fixed platform 3 in the front-rear direction. As shown in fig. 6, the extension platform 4 comprises a frame, a guide rail, a panel and a turning plate 42, wherein the front end of the frame is riveted with the panel, the rear end of the frame is provided with the turning plate 42, and the turning plate 42 is hinged with the panel through a hinge. The guide rail is fixedly connected below the frame and is assembled by being matched with the roller arranged on the fixed platform 3, so that the extension platform 4 can slide back and forth on the fixed platform 3 along the front and back directions. The end part of the guide rail is provided with a positioning block for preventing the roller from sliding out of the guide rail.
The extension platform 4 is also provided with a limiting pin 43, the fixed platform is provided with a limiting hole, and the limiting pin 43 is matched with the limiting hole to limit the extension platform.
The ladder frame 5 comprises an upper ladder 51 and a lower ladder 52, the lower ladder 52 is fixedly connected with the underframe 1, and the upper ladder 51 is fixedly connected with the fixed platform 3. When the scissor brackets of the lifting mechanism 2 are combined, the gap between the lower ladder 52 and the underframe 1 can accommodate the upper ladder 51. Both the upper ladder 51 and the lower ladder 52 are provided with footrests for an operator to get up and down the ladder frame. The traction rod 9 is provided with a hook, and when the traction rod 9 is not in use, the traction rod 9 can be hung on the pedal of the lower ladder 52 through the hook.
The fixed platform 3 is provided with a guardrail connector 32, and the guardrail connector 32 is hinged with the fixed platform guardrail 7. The fixed platform guard rail 7 is cross-foldable and is placed between the fixed platform 3 and the extension platform 4 without affecting the mutual sliding of the fixed platform 3 and the extension platform 4. The extension platform 4 is provided with an extension platform guardrail 8; the extension platform 4 is provided with a guardrail seat on the frame, the extension platform guardrail 8 is provided with a stand 81 penetrating the guardrail seat, and the guardrail seat is provided with a knob plunger to lock the stand 81 so as to realize the height-adjustable guardrail.
In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "front," "rear," and the like refer to an orientation or positional relationship based on that shown in the drawings for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.
In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "provided with," "connected to," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Example 2:
it differs from embodiment 1 mainly in that in this embodiment:
the pulley 13 is a rubber wheel. Locking mechanism and frame 11 fixed connection are provided with the handle that can slide from top to bottom on the locking mechanism, and the handle below is provided with the nylon piece, and the nylon piece descends to certain height and locks the rubber wheel.
The support leg 15 is rotatably connected with the frame 11 through the support leg, and the rotatable angle between the support leg 15 and the frame 11 is 0-90 degrees; the support legs 15 can be rotated to the side of the frame 11 without using the frame, and the occupied area is smaller.
The extension arms 12 are spaced apart by a distance greater than the diameter of the aircraft wheel. When the working ladder is used, the extension arms are arranged on two sides of the airplane wheel, so that the working ladder can approach the parts of the airplane, such as the airplane belly, the wing roots and the like, which are difficult to approach.
The upper end above the frame 11 is provided with a bracket 14, and the bracket 14 is used for supporting the lifting mechanism 2, the fixed platform 3 and the extension platform 4 when the shearing fork brackets are combined, so that the shearing fork brackets are prevented from being crushed due to overlarge stress.
The front ends of the fixed platform 3 and the extension platform 4 are provided with crash bars 6 for preventing collisions with the aircraft skin. Foot pedals 44 are provided on both sides of the extension platform 4 for securing the safety of the overhead workers.
The lifting system comprises a hydraulic system which provides power for the hydraulic cylinder 21; the hydraulic system adopts an integrated hydraulic pump station to reduce the oil leakage risk of the hydraulic system, and the integrated hydraulic pump station integrates a hydraulic oil tank, a hand pump and a hydraulic valve.
The operation steps are as follows:
1. the working ladder is towed to the vicinity of the aircraft, and the towing bar is put down, so that the towing bar is parallel to the advancing direction of the working ladder; 4 supporting feet contracted at the left side and the right side of the frame are respectively opened, and hand wheels above the supporting feet are respectively rotated to support the ground by the supporting feet; respectively rotating 2 handles of a locking mechanism above the rear end pulley of the frame, so that nylon blocks below the locking structure descend to lock the rear end pulley of the frame;
2. lifting the extending platform guardrails (lifted to the highest position) on two sides of the extending platform, and locking the upright posts of the extending platform guardrails by using 4 knob plungers respectively; locking a limiting pin of the extension platform into a limiting hole on the fixed platform;
when the workbench needs to be lengthened, the limiting pin is taken down, the turning plate on the extension platform is turned up, the extension platform is pushed out, and the limiting pin of the extension platform is locked in the limiting hole on the fixed platform; then put down the turning plate, turn up the guard bars of both sides of the fixed platform which are folded under the extending platform in a crossing way respectively;
3. respectively clamping the baffle rods at the front and rear sides of the extending platform guardrails into corresponding clamping buckles of the extending platform guardrails at the two sides;
4. opening a stop valve of the hydraulic system; the working platform (namely a fixed platform and an extension platform) of the working ladder rises; closing the stop valve after the working ladder reaches the use height;
5. when the working ladder is used and is about to descend, the stop valve is opened first; the working ladder slowly descends to a parking height; the steps 3, 2 and 1 are reversely carried out.
Finally, it should be noted that: it is apparent that the above examples are only illustrative of the present utility model and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.
Claims (10)
1. The hydraulic working ladder for the aircraft is characterized by comprising a bottom frame (1), a lifting mechanism (2), a working platform and a ladder frame (5);
the lifting mechanism (2) is arranged between the underframe (1) and the working platform to adjust the lifting height of the working platform;
the ladder frame (5) is arranged between the underframe (1) and the working platform for operators to go up and down the working platform;
the lifting mechanism (2) is a scissor type lifter;
the working platform comprises a fixed platform (3) and an extension platform (4), wherein the extension platform (4) is assembled on the fixed platform (3) in a reciprocating sliding manner along the front-back direction, and the extension platform slides along the front end to increase the length of the fixed platform (3).
2. An aircraft hydraulic ladder according to claim 1, characterized in that the underframe (1) comprises a frame (11) and extension arms (12), wherein two extension arms (12) are symmetrically arranged at the front end of the frame (11), the length of the frame (11) is consistent with the length of the fixed platform (3), and the length of the extension arms (12) is consistent with the longest extension length of the extension platform (4).
3. An aircraft hydraulic ladder according to claim 2, characterized in that the underframe (1) is provided with a pulley (13), the pulley (13) is arranged at the front end of the extension arm (12) and at the rear end of the frame (11), and a locking mechanism is arranged on the rear end pulley (13) for locking the pulley (13).
4. A hydraulic working ladder for an aircraft according to claim 3, characterized in that the frame (11) is provided with feet (15) for fixing the underframe (1), the extension arms (12) being spaced apart by a distance greater than the diameter of the aircraft wheels.
5. An aircraft hydraulic working ladder according to claim 1, characterized in that the ladder frame (5) comprises an upper ladder (51) and a lower ladder (52), said lower ladder (52) being fixedly connected to the underframe (1), said upper ladder (51) being fixedly connected to the fixed platform (3); when the scissor supports of the lifting mechanism (2) are combined, a gap between the lower ladder (52) and the underframe (1) can accommodate the upper ladder (51).
6. An aircraft hydraulic ladder according to claim 1, characterized in that the fixed platform (3) is provided with roller mounting seats on which rollers are fitted.
7. An aircraft hydraulic ladder according to claim 6, characterized in that the extension platform (4) comprises a frame, a guide rail, a panel and a turning plate (42), the front end of the frame is riveted with the panel, the rear end of the frame is provided with the turning plate (42), and the turning plate (42) is hinged with the panel through a hinge; the guide rail is fixedly connected below the frame and is assembled with the idler wheels arranged on the fixed platform (3) in a matching mode.
8. An aircraft hydraulic ladder according to claim 7, characterized in that the front ends of the fixed platform (3) and the extension platform (4) are provided with crash bars (6).
9. An aircraft hydraulic ladder according to claim 8, wherein the extension platform (4) is further provided with a limiting pin (43), the fixed platform is provided with a limiting hole, and the limiting pin (43) cooperates with the limiting hole to limit the extension platform.
10. A hydraulic working ladder for an aircraft according to any one of claims 6-9, characterized in that the fixed platform (3) is provided with a fixed platform rail (7), the extension platform (4) is provided with an extension platform rail (8), the fixed platform rail (7) being foldable; the guardrail seat is arranged on the frame of the extension platform (4), the upright posts (81) are arranged on the guardrail (8) of the extension platform in a penetrating manner, and the upright posts (81) are locked by the knob plungers on the guardrail seat to realize the height adjustment of the guardrail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320138279.4U CN219384702U (en) | 2023-02-01 | 2023-02-01 | Hydraulic working ladder for airplane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320138279.4U CN219384702U (en) | 2023-02-01 | 2023-02-01 | Hydraulic working ladder for airplane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219384702U true CN219384702U (en) | 2023-07-21 |
Family
ID=87197592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320138279.4U Active CN219384702U (en) | 2023-02-01 | 2023-02-01 | Hydraulic working ladder for airplane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219384702U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117533516A (en) * | 2024-01-09 | 2024-02-09 | 山西禧佑源民机完工中心有限公司 | Aircraft wing maintenance ladder assembly |
-
2023
- 2023-02-01 CN CN202320138279.4U patent/CN219384702U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117533516A (en) * | 2024-01-09 | 2024-02-09 | 山西禧佑源民机完工中心有限公司 | Aircraft wing maintenance ladder assembly |
| CN117533516B (en) * | 2024-01-09 | 2024-03-19 | 山西禧佑源民机完工中心有限公司 | Aircraft wing maintenance ladder assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN219384702U (en) | Hydraulic working ladder for airplane | |
| US20180119432A1 (en) | Scaffold unit | |
| US20140041963A1 (en) | Deployable Hybrid Mobile Elevating Access Platform | |
| DE102007000604A1 (en) | printing tower | |
| CN114232973A (en) | High-altitude operation platform for construction of steel structure engineering | |
| CN220562949U (en) | Aircraft wing maintenance platform capable of jacking | |
| CN115043351A (en) | Hydraulic lifting platform for carrying passenger cabin goods | |
| CN108186210B (en) | Sliding side-turning stretcher for medical rescue vehicle | |
| CN208856845U (en) | Aerial work platform | |
| CN203767933U (en) | Hydraulic lifting obstacle-free platform | |
| KR101299583B1 (en) | Portable sloping road | |
| CN108502828B (en) | Universal operation platform for locomotive overhaul | |
| CN113247033B (en) | Foldable guardrail and railway wagon | |
| CN103046469B (en) | Fast lifting platform of bridge inspection vehicle | |
| CN212174397U (en) | Self-walking scissor-fork type aerial work platform | |
| CN110155861B (en) | Large-stroke maintenance elevator based on folding car | |
| CN218754909U (en) | Safety protection device for large-scale chemical equipment maintenance platform | |
| CN208413776U (en) | A kind of general job platform for the maintenance of motor-car head | |
| CN112031635A (en) | Over-and-under type aircraft maintenance work ladder | |
| US4520996A (en) | Aircraft engine maintenance stand | |
| CN208632043U (en) | Aircraft engine machine overhauling ladder | |
| CN215255995U (en) | Lift type airplane cabin door approaching ladder | |
| CN111502527A (en) | Aircraft engine maintenance work ladder | |
| CN201460700U (en) | Ladder with armrest type guard bar | |
| CN220446451U (en) | Proximity operation platform of double-fork curved knife type winglet on 737 model |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |