CN211056612U - Automatic scalability aircraft wing bracket device - Google Patents
Automatic scalability aircraft wing bracket device Download PDFInfo
- Publication number
- CN211056612U CN211056612U CN201922189971.6U CN201922189971U CN211056612U CN 211056612 U CN211056612 U CN 211056612U CN 201922189971 U CN201922189971 U CN 201922189971U CN 211056612 U CN211056612 U CN 211056612U
- Authority
- CN
- China
- Prior art keywords
- main body
- frame
- arc
- body frame
- auxiliary frame
- 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.)
- Expired - Fee Related
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 81
- 238000000034 method Methods 0.000 claims abstract description 5
- 239000010720 hydraulic oil Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
Images
Landscapes
- Forklifts And Lifting Vehicles (AREA)
Abstract
The utility model discloses an automatic scalability aircraft wing bracket device, include: the integral frame mechanism comprises a main body frame and an auxiliary frame which are of truss structures, wherein the connecting end of the main body frame is inserted into the connecting end of the auxiliary frame and can slide in the connecting end of the auxiliary frame; the main body frame is provided with a first sliding table mechanism for driving the auxiliary frame to slide; the lifting support leg mechanism is characterized by further comprising a jacking mechanism, an arc-shaped bracket mechanism, a lifting support leg mechanism and a driving wheel mechanism. The utility model discloses can stabilize the lift to various not unidimensional aircraft wings, novel structure adopts flexible method to make the bracket suitability stronger, has increased suitable type, reduces the space that the bracket occupy when idle, reduces manpower and materials, has improved work efficiency.
Description
Technical Field
The utility model belongs to the supplementary device field of maintaining of aircraft especially relates to an automatic scalability aircraft wing bracket device.
Background
The wing is used as one of important parts in the disassembly process of the airplane, a multi-stage web plate, a cross beam and a skin are adopted to construct and connect, the wing also has upper and lower chord horizontal supports, brace, pull rod and other accessory supports, and various hydraulic and mechanical devices are inserted in the wing. When the wings after the airplane is disassembled are reinstalled, because the wings have three characteristics of large span, large volume and large weight, how to ensure the support of the wings when the wings are maintained becomes an important technical index and an efficiency index of wing maintenance. The existing aircraft wing bracket adopts multi-person push-pull, the wing bracket is placed at a jacking point on the lower surface of a wing, two jacks are placed at the upper end of the wing bracket for jacking simultaneously, and two persons are required to rotate a crank to adjust the lifting of the bracket below the bracket. This method requires a great deal of labor to perform simultaneous work, and thus maintenance efficiency is greatly reduced. The existing wing brackets are set according to the specific model of the airplane, and a great amount of various wing brackets are stored for airplane maintenance companies, so that the space of an airplane hangar is occupied.
Based on this, the utility model designs an automatic scalability aircraft wing bracket device to solve above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an automatic scalability aircraft wing bracket device to solve the problem that proposes among the above-mentioned background art.
The utility model discloses a solve above-mentioned technical problem and adopt following technical scheme:
an automatically retractable aircraft wing bracket device, comprising:
the integral frame mechanism comprises a main body frame and an auxiliary frame which are of truss structures, wherein the connecting end of the main body frame is inserted into the connecting end of the auxiliary frame and can slide in the connecting end of the auxiliary frame; the main body frame is provided with a first sliding table mechanism for driving the auxiliary frame to slide;
the jacking mechanism comprises two sliding table mechanisms II which are respectively arranged on the main body framework and the auxiliary framework, a jack is vertically arranged on each sliding table mechanism II, a cross beam is arranged on each jack, a connecting beam is arranged at the end part of the cross beam of the main body framework, and the other end of each connecting beam is connected with the cross beam on the auxiliary framework in a sliding mode; the tops of the main body frame and the auxiliary frame are both provided with vertical grooves for the cross beam to slide up and down;
the arc-shaped bracket mechanism comprises two arc-shaped bracket bases which are respectively hinged to the outer sides of the tops of the main body frame and the auxiliary frame and are positioned on the same horizontal line with the cross beam, the arc-shaped bracket bases are connected with the arc-shaped brackets in a sliding mode, and a pair of fixed pulleys is arranged at the free ends of the arc-shaped bracket bases; traction wires are arranged at two ends of each arc-shaped bracket, each traction wire is connected with a take-up reel mechanism, the two take-up reel mechanisms connected to the same arc-shaped bracket are respectively positioned on the main body frame and the auxiliary frame, and the traction wires are overlapped on the fixed pulleys; the cross beam is provided with a slide rail for the arc-shaped bracket to slide; a hydraulic cylinder for driving the arc-shaped bracket to rotate is hinged between the arc-shaped bracket base and the main body frame or the auxiliary frame;
the lifting support leg mechanism comprises four support legs and four auxiliary wheels, wherein the four support legs and the four auxiliary wheels are arranged at four corners of the integral frame mechanism, the support legs are provided with lifting mechanisms, and the auxiliary wheels comprise electric lifting columns and universal wheels.
The driving wheel mechanism comprises four wheels connected to four corners of the bottom of the integral frame mechanism through rotating shafts, and driving motors and a steering mechanism are arranged on the wheels.
Further, the first sliding table mechanism comprises a first stepping motor arranged on the main body frame through a first motor fixing seat, the first stepping motor is connected with a first screw pair through a first cross universal joint coupler, the first screw pair comprises a first screw and a first sliding block, bearings at two ends of the first screw are connected with a first supporting block and a second supporting block, the first supporting block is slidably sleeved on the auxiliary frame, and the second supporting block is fixedly sleeved on the main body frame; and the first sliding block is fixedly connected to the end part of the auxiliary frame.
Furthermore, a polished rod is further erected between the first supporting block and the second supporting block, and the bottom of the first sliding block is connected with the polished rod in a sliding mode.
Further, the second sliding table mechanism comprises a second stepping motor and a guide rail, bearing supports are arranged at two ends of the guide rail, a second lead screw pair is connected with a bearing in the bearing supports, the second lead screw pair comprises a second lead screw and a second sliding block, the second lead screw is connected with the second stepping motor, a sliding table is arranged on the second sliding block, and the jack is fixed on the sliding table.
Further, the take-up reel mechanism comprises a motor fixing seat, a first motor and a winder.
Furthermore, the lifting mechanism comprises a second motor, the second motor is connected with a gear box, the support legs are provided with a worm gear lifter, and the gear box is connected with the worm gear lifter through a coupler.
Furthermore, the steering mechanism comprises a hydraulic oil cylinder mounting seat mounted at the bottom of the main body frame or the auxiliary frame, a hydraulic oil cylinder is hinged to the hydraulic oil cylinder mounting seat, a steering rod is arranged on one side of the rotating shaft, and the hydraulic oil cylinder is hinged to the steering rod through a connecting rod.
Further, two wheels on the main body frame or the auxiliary frame are synchronously connected through -shaped connecting rods.
Furthermore, a wire groove for containing a traction wire is further arranged on the cross beam.
The utility model adopts the above technical scheme to compare with prior art, have following technological effect:
the utility model discloses can stabilize the lift to various not unidimensional aircraft wings, novel structure adopts flexible method to make the bracket suitability stronger, has increased suitable type, reduces the space that the bracket occupy when idle, reduces manpower and materials, has improved work efficiency.
Drawings
FIG. 1 is a schematic view of the overall structure of the present embodiment;
fig. 2 is a schematic structural view of a first sliding table mechanism in the embodiment;
FIG. 3 is a schematic structural diagram of a second Zhonghua celestial mechanism in this embodiment;
FIG. 4 is a schematic structural diagram of a take-up reel mechanism according to the present embodiment;
FIG. 5 is a drawing of the connection relationship of the traction wires in this embodiment;
FIG. 6 is a schematic structural view of a gear case in the present embodiment;
fig. 7 is a schematic structural view of the steering mechanism in this embodiment.
In the figure, 1-integral frame mechanism, 3-arc bracket mechanism, 4-lifting support leg mechanism, 401-support leg, 402-electric lifting column, 403-universal wheel, 5-driving wheel mechanism, 6-main body frame, 7-sliding table mechanism I, 8-auxiliary frame, 9-support block I, 10-slide block I, 11-lead screw I, 12-optical bar, 14-support block II, 15-motor fixing seat I, 16-cross universal joint coupler I, 17-stepping motor I, 20-stepping motor II, 2-sliding table mechanism II, 21-guide rail, 22-jack, 23-hydraulic oil cylinder, 24-arc bracket, 25-arc bracket base, 26-take-up reel mechanism, 30-cross beam, 31-slide rail, 311-vertical groove, 32-jack, 33-sliding table, 34-second sliding block, 36-second lead screw, 37-bearing support, 39-wire groove, 40-bracket baffle, 41-fixed pulley, 43-winder, 44-first motor, 45-second motor fixing seat, 402-electric lifting column, 403-universal wheel, 46-worm gear lifter, 47-second cross universal joint coupler, 48-second motor, 51-gear box, 52-wheel, 53-driving motor, 54-hydraulic cylinder, 55-connecting rod, 56-hydraulic cylinder mounting seat, 57-connecting rod and 58-steering rod.
Detailed Description
The technical scheme of the utility model is further explained in detail with the attached drawings as follows:
an automatic retractable aircraft wing bracket device, as shown in figures 1 and 2, comprises the following parts:
the integral frame mechanism 1 comprises a main body frame 6 and an auxiliary frame 8 which are of truss structures, wherein the connecting end of the main body frame 6 is inserted into the connecting end of the auxiliary frame 8 and can slide in the connecting end of the auxiliary frame 8; a sliding table mechanism I7 used for driving the auxiliary frame to slide is arranged on the main body frame 6; the sliding table mechanism I7 comprises a stepping motor I17 arranged on the main body frame 6 through a motor fixing seat I15, the stepping motor I17 is connected with a screw pair I through a cross universal joint coupler I16, the screw pair I comprises a screw I11 and a slider I10, bearings at two ends of the screw I11 are connected with a supporting block I9 and a supporting block II 14, the supporting block I9 is slidably sleeved on the auxiliary frame 8, and the supporting block II 14 is fixedly sleeved on the main body frame 6; the first sliding block 9 is fixedly connected to the end part of the auxiliary frame 8. A polished rod 12 is further erected between the first supporting block 9 and the second supporting block 14, and the bottom of the first sliding block 10 is connected with the polished rod 12 in a sliding mode.
The working principle is as follows: the first step motor drives the first cross universal joint coupler to further drive the first lead screw to rotate, so that the first driving slide block moves on the first lead screw, and the purpose of adjusting the distance between the main body frame and the auxiliary frame is achieved.
The jacking mechanism comprises two sliding table mechanisms 2 which are respectively arranged on a main body frame 6 and an auxiliary frame 8, wherein a jack 22 is vertically arranged on the sliding table mechanism 2, a cross beam 30 is arranged on the jack 22, a connecting beam is arranged at the end part of the cross beam 30 of the main body frame 6, and the other end of the connecting beam is connected with the cross beam 30 on the auxiliary frame in a sliding manner, as shown in fig. 1 and 3; the top of the main body frame 6 and the auxiliary frame 8 are both provided with vertical slots 311 for the cross beams to slide up and down. The second sliding table mechanism 2 comprises a second stepping motor 20 and a guide rail 21, bearing supports 37 are arranged at two ends of the guide rail 21, a second lead screw pair is connected with a bearing in the bearing supports 37, the second lead screw pair comprises a second lead screw 36 and a second sliding block 34, the second lead screw 36 is connected with the second stepping motor 20, a sliding table 33 is arranged on the second sliding block 34, and the jack 32 is fixed on the sliding table 33.
The working principle is as follows: the second screw rod is driven to rotate through the second stepping motor, so that the sliding table is driven to horizontally move on the second screw rod, the position of the jack is adjusted, and then the cross beam is jacked up or lowered down through the jack.
The arc bracket mechanism 3, as shown in fig. 1, 4 and 5, includes a left arc bracket base 25 and a right arc bracket base 25, which are respectively hinged on the outer sides of the tops of the main frame 6 and the auxiliary frame 8 and are in the same horizontal line with the cross beam, the arc bracket base 25 is connected with the arc bracket 24 in a sliding manner, the end part of the arc bracket base 25 is provided with a bracket baffle 40, and the free end of the arc bracket base 25 is provided with a pair of fixed pulleys 41; both ends of the arc-shaped bracket 24 are provided with traction wires, each traction wire is connected with a take-up reel mechanism respectively, and each take-up reel mechanism comprises a motor fixing seat II 45, a motor I44 and a wire winder 43. Two take-up reel mechanisms 26 connected to the same arc-shaped bracket 24 are respectively positioned on the main body frame 6 and the auxiliary frame 8, and the traction wire is overlapped on the fixed pulley 41; the cross beam 30 is provided with a slide rail for the arc-shaped bracket 24 to slide; the cross beam 30 is also provided with a wire casing 39 for accommodating a traction wire. A hydraulic cylinder 23 for driving the arc bracket 24 to rotate is hinged between the arc bracket base 25 and the main body frame 6 or the auxiliary frame 8.
The working principle is as follows: the arc bracket base and the arc bracket are driven to rotate to the horizontal position through a hydraulic cylinder as shown in figure 1, and then, two arc brackets are pulled to the cross beam by a take-up reel mechanism as shown in figure 5. After the use, the arc bracket is pulled back to the arc bracket base and then put down by the hydraulic cylinder.
The lifting support leg mechanism 4, as shown in fig. 1 and 6, includes four support legs 401 and four auxiliary wheels arranged at four corners of the integral frame mechanism 1, and the support legs 46 are provided with lifting mechanisms, and the auxiliary wheels include electric lifting columns and universal wheels. The lifting mechanism comprises a second motor 48, a gear box 51 is connected to the second motor 48, a worm gear lifter 46 is arranged on the supporting leg 401, and the gear box is connected with the worm gear lifter 46 through a cross universal joint coupler II 47.
The working principle is as follows: the gear box and the cross universal joint coupler are driven to rotate through the motor II, and then the supporting legs are lifted by the worm and gear lifter, so that the integral frame mechanism is stably supported. And then the universal wheels are extended out by utilizing the electric lifting columns, so that the integral frame mechanism is supported in an auxiliary manner.
The driving wheel mechanism 5, as shown in fig. 1 and 7, comprises four wheels 52 connected with four corners of the bottom of the integral frame mechanism through rotating shafts, driving motors 53 and a steering mechanism are arranged on the wheels 52, the steering mechanism comprises a hydraulic oil cylinder mounting seat 56 mounted at the bottom of the main body frame 6 or the auxiliary frame 8, a hydraulic oil cylinder 54 is hinged on the hydraulic oil cylinder mounting seat 56, a steering rod 58 is arranged at one side of the rotating shaft, the hydraulic oil cylinder 54 is hinged with the steering rod 58 through a connecting rod 55, and the two wheels 52 on the main body frame 6 or the auxiliary frame 8 are synchronously connected through a connecting rod 57 in an shape.
The working principle is as follows: the driving motor drives the wheels to move, and the hydraulic oil cylinder drives the steering rod to drive the wheels to steer.
Description of specific embodiments:
during the use, according to the size of different model wings, adjust the distance between main body frame and the auxiliary frame through slip table mechanism one, then utilize two position of adjusting the jack of slip table mechanism, then utilize the pneumatic cylinder to lift the arc bracket, utilize take-up reel structure to pull the arc bracket to the crossbeam after that, the height of crossbeam can be adjusted a little to the jack to the laminating wing that the arc bracket can be better. And finally, the supporting legs and the universal wheels sequentially extend out to stably support the whole body, so that the mechanism is adjusted, and then the wing is placed. After the use, the arc bracket is pulled back to the arc bracket base and the arc bracket base is collected. Then the cross beam is put down, and the supporting legs and the universal wheels are retracted. Finally, wheels are used to move the carriage assembly.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Above embodiment only is for explaining the utility model discloses a technical thought can not be injectd with this the utility model discloses a protection scope, all according to the utility model provides a technical thought, any change of doing on technical scheme basis all falls into the utility model discloses within the protection scope. Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the art.
Claims (9)
1. An automatic retractable aircraft wing bracket device, characterized in that: the method comprises the following steps:
the integral frame mechanism comprises a main body frame and an auxiliary frame which are of truss structures, wherein the connecting end of the main body frame is inserted into the connecting end of the auxiliary frame and can slide in the connecting end of the auxiliary frame; the main body frame is provided with a first sliding table mechanism for driving the auxiliary frame to slide;
the jacking mechanism comprises two sliding table mechanisms II which are respectively arranged on the main body framework and the auxiliary framework, a jack is vertically arranged on each sliding table mechanism II, a cross beam is arranged on each jack, a connecting beam is arranged at the end part of the cross beam of the main body framework, and the other end of each connecting beam is connected with the cross beam on the auxiliary framework in a sliding mode; the tops of the main body frame and the auxiliary frame are both provided with vertical grooves for the cross beam to slide up and down;
the arc-shaped bracket mechanism comprises two arc-shaped bracket bases which are respectively hinged to the outer sides of the tops of the main body frame and the auxiliary frame and are positioned on the same horizontal line with the cross beam, the arc-shaped bracket bases are connected with the arc-shaped brackets in a sliding mode, and a pair of fixed pulleys is arranged at the free ends of the arc-shaped bracket bases; traction wires are arranged at two ends of each arc-shaped bracket, each traction wire is connected with a take-up reel mechanism, the two take-up reel mechanisms connected to the same arc-shaped bracket are respectively positioned on the main body frame and the auxiliary frame, and the traction wires are overlapped on the fixed pulleys; the cross beam is provided with a slide rail for the arc-shaped bracket to slide; a hydraulic cylinder for driving the arc-shaped bracket to rotate is hinged between the arc-shaped bracket base and the main body frame or the auxiliary frame;
the lifting support leg mechanism comprises four support legs and four auxiliary wheels, the four support legs are arranged at four corners of the integral frame mechanism, the lifting mechanisms are arranged on the support legs, and the auxiliary wheels comprise electric lifting columns and universal wheels;
the driving wheel mechanism comprises four wheels connected to four corners of the bottom of the integral frame mechanism through rotating shafts, and driving motors and a steering mechanism are arranged on the wheels.
2. An automatically retractable aircraft wing bracket assembly as claimed in claim 1, wherein: the first sliding table mechanism comprises a first stepping motor arranged on the main body frame through a first motor fixing seat, the first stepping motor is connected with a first lead screw pair through a first cross universal joint coupler, the first lead screw pair comprises a first lead screw and a first sliding block, bearings at two ends of the first lead screw are connected with a first supporting block and a second supporting block, the first supporting block is slidably sleeved on the auxiliary frame, and the second supporting block is fixedly sleeved on the main body frame; and the first sliding block is fixedly connected to the end part of the auxiliary frame.
3. An automatically retractable aircraft wing bracket assembly as claimed in claim 2, wherein: and a polish rod is further erected between the first supporting block and the second supporting block, and the bottom of the first sliding block is in sliding connection with the polish rod.
4. An automatically retractable aircraft wing bracket assembly as claimed in claim 1, wherein: the second sliding table mechanism comprises a second stepping motor and a guide rail, bearing supports are arranged at two ends of the guide rail, a second lead screw pair is connected with a bearing in the bearing supports, the second lead screw pair comprises a second lead screw and a second sliding block, the second lead screw is connected with the second stepping motor, a sliding table is arranged on the second sliding block, and the jack is fixed on the sliding table.
5. An automatically retractable aircraft wing bracket assembly as claimed in claim 1, wherein: the take-up reel mechanism comprises a motor fixing seat, a motor I and a winder.
6. An automatically retractable aircraft wing bracket assembly as claimed in claim 1, wherein: the lifting mechanism comprises a second motor, a second gear box is connected to the second motor, a worm gear lifter is arranged on the supporting leg, and the gear box is connected with the worm gear lifter through a coupler.
7. An automatically retractable aircraft wing bracket assembly as claimed in claim 1, wherein: the steering mechanism comprises a hydraulic oil cylinder mounting seat mounted at the bottom of the main body frame or the auxiliary frame, a hydraulic oil cylinder is hinged to the hydraulic oil cylinder mounting seat, a steering rod is arranged on one side of the rotating shaft, and the hydraulic oil cylinder is hinged to the steering rod through a connecting rod.
8. The automatic telescopic airplane wing bracket device as claimed in claim 7, wherein the two wheels on the main body frame or the auxiliary frame are synchronously connected through -shaped connecting rods.
9. An automatically retractable aircraft wing bracket assembly as claimed in claim 1, wherein: and a wire groove for accommodating a traction wire is also arranged on the cross beam.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201922189971.6U CN211056612U (en) | 2019-12-10 | 2019-12-10 | Automatic scalability aircraft wing bracket device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201922189971.6U CN211056612U (en) | 2019-12-10 | 2019-12-10 | Automatic scalability aircraft wing bracket device |
Publications (1)
Publication Number | Publication Date |
---|---|
CN211056612U true CN211056612U (en) | 2020-07-21 |
Family
ID=71588914
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201922189971.6U Expired - Fee Related CN211056612U (en) | 2019-12-10 | 2019-12-10 | Automatic scalability aircraft wing bracket device |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN211056612U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2598973A (en) * | 2020-09-17 | 2022-03-23 | Coughlin Daniel | Shoring system for aircraft and the like |
-
2019
- 2019-12-10 CN CN201922189971.6U patent/CN211056612U/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2598973A (en) * | 2020-09-17 | 2022-03-23 | Coughlin Daniel | Shoring system for aircraft and the like |
GB2598973B (en) * | 2020-09-17 | 2022-11-02 | Coughlin Daniel | Shoring system for aircraft and the like |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN110835071A (en) | Automatic scalability aircraft wing bracket device | |
CN114152828B (en) | Flexible direct-current transmission converter valve submodule power overhaul test device and test method | |
CN213428925U (en) | Single-motor lifting table | |
CN115663685B (en) | Power transmission line crossing construction device and construction process thereof | |
CN211056612U (en) | Automatic scalability aircraft wing bracket device | |
CN209324008U (en) | A kind of bricklaying robot with lifting device | |
CN111706052A (en) | Synchronous lifting device for building | |
CN219175821U (en) | Lifting construction platform for mounting steel structure of elevator in well | |
CN109648694B (en) | Shield cement segment curved surface trowelling machine | |
CN218371651U (en) | EMUs locomotive is synthesized and is overhauld moving platform | |
CN115676722A (en) | Liftable aircraft large wing maintenance platform | |
CN210795646U (en) | Large-load movable lifting platform | |
CN210949178U (en) | Lifting device for oil-submersible pump | |
CN219117070U (en) | Dedicated jacking equipment of electromechanical installation | |
CN217332777U (en) | Auxiliary test lifting cabinet | |
CN220245335U (en) | Lifting device for ground disaster treatment construction | |
CN221625824U (en) | Lifting platform for interior decoration | |
CN220317195U (en) | Elevator for hydraulic support assembly pin | |
CN217079585U (en) | Scaffold with raising and lowering functions | |
CN221027418U (en) | Auxiliary lifting device for air conditioner maintenance | |
CN220283535U (en) | But height-adjusting's mounting platform | |
CN218810199U (en) | Folding type extension platform | |
CN221321667U (en) | Liftable operation platform for building construction | |
CN220182712U (en) | Construction auxiliary equipment under complicated operating mode | |
CN220909049U (en) | Mobile operation platform for construction |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200721 |
|
CF01 | Termination of patent right due to non-payment of annual fee |