CN114920148A - Positioning and adjusting auxiliary mounting device for mounting electromechanical equipment - Google Patents
Positioning and adjusting auxiliary mounting device for mounting electromechanical equipment Download PDFInfo
- Publication number
- CN114920148A CN114920148A CN202210560112.7A CN202210560112A CN114920148A CN 114920148 A CN114920148 A CN 114920148A CN 202210560112 A CN202210560112 A CN 202210560112A CN 114920148 A CN114920148 A CN 114920148A
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- Prior art keywords
- rod
- supporting
- groove
- lifting
- base
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C19/00—Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
- B66C1/28—Duplicate, e.g. pivoted, members engaging the loads from two sides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C11/00—Trolleys or crabs, e.g. operating above runways
- B66C11/02—Trolleys or crabs, e.g. operating above runways with operating gear or operator's cabin suspended, or laterally offset, from runway or track
- B66C11/04—Underhung trolleys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C5/00—Base supporting structures with legs
- B66C5/02—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
- B66C9/08—Runners; Runner bearings
Abstract
The invention discloses a positionable and adjustable auxiliary mounting device for mounting electromechanical equipment, which comprises a translation supporting plate, a moving block and a connecting rod, wherein a through groove is formed in the translation supporting plate, the moving block is arranged on the translation supporting plate, and a lifting rod is arranged on the moving block. This electromechanical device installation is with supplementary installation device that can fix a position the adjustment, be provided with the support base, be convenient for carry out the translation to the device through the gyro wheel that supports the base bottom, make the device when supplementary installation electromechanical device, can change electromechanical device's position, and then adjust electromechanical device's mounted position, the translation backup pad of deuterogamying carries out the ascending adjustment of another side to electromechanical device, make electromechanical device can fix a position on a correct position, be convenient for install electromechanical device, the device has improved electromechanical device to electromechanical device's supplementary installation effect, the installation degree of difficulty of electromechanical device has been reduced, the convenience that the device used has been improved.
Description
Technical Field
The invention relates to the technical field of electromechanical equipment, in particular to a positionable and adjustable auxiliary mounting device for mounting electromechanical equipment.
Background
Electromechanical equipment generally refers to machinery, electrical equipment and electrical automation equipment, and in buildings, the electromechanical equipment refers to machinery and pipeline equipment except for earthwork, carpenter, reinforcing steel bars and muddy water. The hardware is different from hardware, and a finished product with certain functions can be realized, along with the continuous improvement of the living standard of people, people have more and more requirements on electromechanical equipment in daily life, and the hardware, the computer, the printer and the like become indispensable electromechanical products in the life of people from vehicles to various household appliances, computers, printers and the like. Advanced electromechanical device can not only improve productivity greatly, alleviate intensity of labour, improve production environment, accomplish the work that the manpower can't be accomplished, and as one of national industry foundation, the development to whole national economy, and the improvement of science and technology, national defense strength has direct, important influence, still measure a national science and technology level and synthesize the important sign of national strength, some electromechanical device self qualities are great, need use some installation device to carry out the auxiliary removal in the in-process of dismantling and installing, and current an auxiliary installation device for electromechanical device installation, when removing electromechanical device, be not convenient for carry out the position removal to auxiliary installation device, lead to auxiliary installation device's auxiliary function to be limited, supplementary effect is not good.
We therefore propose a positionally adjustable auxiliary mounting device for electromechanical equipment mounting to address the problems set out above.
Disclosure of Invention
The invention aims to provide a positionable and adjustable auxiliary installation device for electromechanical equipment installation, which is used for solving the problems that the auxiliary installation device for electromechanical equipment installation in the existing market is inconvenient to move when electromechanical equipment is moved, so that the auxiliary function of the auxiliary installation device is limited and the auxiliary effect is poor.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an electromechanical device installs with supplementary installation device that can fix a position adjustment, includes translation backup pad, movable block, lifter, supporting platform, adds and holds pole and connecting rod, its characterized in that: a through groove is formed in the translation supporting plate, a moving block is arranged on the translation supporting plate, a longitudinal first threaded hole is formed in the moving block, the lifting rod penetrates through the first threaded hole, a lifting base is arranged at the lower end of the lifting rod, a lifting motor is arranged in the lifting base, an output shaft of the lifting motor is connected with the lifting rod, a supporting platform is mounted at the bottom of the lifting base, a first motor is mounted at the side part of the supporting platform, a clamping groove is formed in the supporting platform, a sliding supporting rod is mounted in the clamping groove, a first threaded rod is mounted on the first motor, a second threaded hole is formed in the clamping rod, a sliding hole is formed in the clamping rod, the first threaded rod penetrates through the second threaded hole, the sliding supporting rod penetrates through the sliding hole, a protruding rod is mounted on the clamping rod, a moving groove is formed below the through groove in the translation supporting plate, the utility model discloses a translation support plate, including the shifting chute, limiting plate, horizontal third screw hole, second threaded rod runs through the third screw hole, translation support plate fixed connection support column, the support base is installed to the support column bottom, install spacing horizontal pole on the lifting base, spacing horizontal pole and support column sliding connection.
Preferably, the width of the moving block is equal to the width of the placing groove.
Preferably, the outer diameter of the lifting rod is smaller than the width of the through groove, and the axis of the lifting rod coincides with the vertical center line of the moving block.
Preferably, it has two sets ofly to add to hold the pole and distribute on supporting platform, and every group adds and holds the pole and all install on a first threaded rod to the screw thread opposite direction of the first threaded rod left and right sides.
Preferably, the bottom of the supporting base is provided with a telescopic block, the bottom of the supporting base is provided with a roller, the bottom of the supporting base is provided with a telescopic groove, a hydraulic rod is arranged in the telescopic groove, the telescopic block is provided with a connecting groove, and the hydraulic rod is arranged in the connecting groove.
Preferably, the two support columns are distributed on the bottom surface of the translation support plate, and the bottom of each support column is located in the middle of the top surface of the support base.
Preferably, the number of the rollers is two on the outer side of the supporting base, the length of the rollers is smaller than the width of the supporting base, and the rollers are fixedly connected with the bottom surface of the supporting base through connecting rods.
Compared with the prior art, the invention has the beneficial effects that: the electromechanical equipment installation is provided with a positioning and adjusting auxiliary installation device,
(1) the electromechanical device is provided with the supporting base, the device is convenient to translate through the roller at the bottom of the supporting base, so that when the electromechanical device is installed in an auxiliary mode, the position of the electromechanical device can be changed, the installation position of the electromechanical device is further adjusted, and the electromechanical device is adjusted in the other direction through the translation supporting plate, so that the electromechanical device can be positioned at a correct position, the electromechanical device is convenient to install, the auxiliary installation effect of the electromechanical device on the electromechanical device is improved, the installation difficulty of the electromechanical device is reduced, and the use convenience of the electromechanical device is improved;
(2) be provided with flexible piece, flexible piece can downwardly extending and outstanding gyro wheel through the effect of hydraulic stem, makes to support the base and contact with ground through flexible piece, prevents to support the base and take place to slide when using, has improved the supporting role of supporting the base to the device, has increased the stability that the device placed, and the contact state of being convenient for adjust gyro wheel and ground through the lift of flexible piece, and then is convenient for adjust the effect of supporting the base, has increased the flexibility that supports the base.
Drawings
FIG. 1 is a schematic view of an appearance structure of an auxiliary installation device capable of being adjusted and positioned for installation of an electromechanical device according to the present invention;
FIG. 2 is a schematic view of a vertical cross-sectional structure of a supporting platform of a positionable and adjustable auxiliary mounting device for mounting electromechanical equipment according to the present invention;
FIG. 3 is a schematic view of a positioning adjustable auxiliary mounting device holding rod for mounting an electromechanical device according to the present invention;
FIG. 4 is a schematic cross-sectional view of a horizontally movable support plate of an auxiliary mounting device for positioning and adjustment for mounting an electromechanical device according to the present invention;
FIG. 5 is a schematic structural diagram of a movable block of an auxiliary mounting device for positioning and adjustment for mounting an electromechanical device according to the present invention;
FIG. 6 is a schematic view of a vertical cross-sectional structure of a supporting base of an auxiliary mounting device for positioning and adjustment for mounting an electromechanical device according to the present invention;
FIG. 7 is a schematic view of a roller structure of an auxiliary mounting device for positioning and adjusting for mounting an electromechanical device according to the present invention.
In the figure: 1. a translation support plate; 2. a through groove; 3. a moving block; 4. a lifting rod; 5. a lifting base; 6. a support platform; 7. a first motor; 8. a holding rod; 9. a support pillar; 10. a support base; 11. a telescopic block; 12. a roller; 13. a holding groove; 14. a sliding support bar; 15. a first threaded rod; 16. a projecting rod; 17. a second threaded hole; 18. a slide hole; 19. a moving groove; 20. a placement groove; 21. a second motor; 22. a second threaded rod; 23. a limiting plate; 24. a first threaded hole; 25. a third threaded hole; 26. a telescopic groove; 27. positioning a rod; 28. a hydraulic lever; 29. connecting grooves; 30. positioning holes; 31. a connecting rod; 32. and a limiting cross rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1-7, the present invention provides a technical solution: a positioning and adjusting auxiliary mounting device for mounting electromechanical equipment comprises a translation supporting plate 1, a moving block 3, a lifting rod 4, a lifting base 5, a supporting platform 6, a first motor 7, a clamping rod 8, a supporting column 9, a supporting base 10, a telescopic block 11, a roller 12, a clamping groove 13, a sliding supporting rod 14, a first threaded rod 15, a protruding rod 16, a second threaded hole 17, a sliding hole 18, a moving groove 19, a placing groove 20, a second motor 21, a second threaded rod 22, a limiting plate 23, a first threaded hole 24, a third threaded hole 25, a telescopic groove 26, a positioning rod 27, a hydraulic rod 28, a connecting groove 29, a connecting rod 31 and a limiting transverse rod 32, wherein a through groove 2 is formed in the translation supporting plate 1, the moving block 3 is provided with the first threaded hole 24, the lifting rod 4 penetrates through the first threaded hole 24, the lower end of the lifting rod 4 is provided with the lifting base 5, a lifting motor is arranged in the lifting base 5, the output shaft of the lifting motor is connected with a lifting rod 4, a supporting platform 6 is arranged at the bottom of the lifting base 5, a first motor 7 is arranged at the side part of the supporting platform 6, a holding rod 8 is arranged on the supporting platform 6, a supporting column 9 is fixedly connected with a translational supporting plate 1, a supporting base 10 is arranged at the bottom of the supporting column 9, a telescopic block 11 is arranged at the bottom of the supporting base 10, a roller 12 is arranged at the bottom of the supporting base 10, a holding groove 13 is arranged on the supporting platform 6, a sliding supporting rod 14 is arranged in the holding groove 13, a first threaded rod 15 is arranged on the first motor 7, a protruding rod 16 is arranged on the holding rod 8, a second threaded hole 17 is arranged on the holding rod 8, a sliding hole 18 is arranged on the holding rod 8, the first threaded rod 15 penetrates through the second threaded hole 17, the sliding supporting rod 14 penetrates through the sliding hole 18, a moving groove 19 is arranged on the translational supporting plate 1, the bottom of the movable groove 19 is provided with a placing groove 20, the end part of the translational supporting plate 1 is provided with a second motor 21, a second threaded rod 22 is installed on the second motor 21, a limiting plate 23 is installed on the movable block 3, a third threaded hole 25 is formed in the movable block 3, the second threaded rod 22 penetrates through the third threaded hole 25, a telescopic groove 26 is formed in the bottom of the supporting base 10, a positioning rod 27 is arranged in the telescopic groove 26, a hydraulic rod 28 is arranged on the telescopic groove 26, a connecting groove 29 is formed in the telescopic block 11, a positioning hole 30 is formed in the telescopic block 11, a connecting rod 31 is installed on the idler wheel 12, and a limiting transverse rod 32 is installed on the lifting base 5.
The limiting plate 23 is a sliding mechanism in the moving groove 19, and the width of the moving block 3 is equal to the width of the placing groove 20, so that the limiting plate 23 can support the sliding of the moving block 3 conveniently.
The lifting rod 4 is in threaded connection with the moving block 3, the outer diameter of the lifting rod 4 is smaller than the width of the through groove 2, and the axis of the lifting rod 4 coincides with the vertical center line of the moving block 3, so that the lifting rod 4 can ascend to the upper side of the translation supporting plate 1.
The clamping rods 8 are distributed on the supporting platform 6 in two groups, each group of clamping rods 8 is arranged on the first threaded rod 15, the thread directions on the first threaded rods 15 are opposite, and the clamping rods 8 can move reversely and conveniently.
Add and hold pole 8 and be extending structure through first threaded rod 15 on supporting platform 6, and add and hold for sliding connection between pole 8 and the sliding support pole 14 to the width that adds and hold pole 8 is the same with the width that adds holding groove 13, is convenient for add through the flexible electromechanical device that adds that holds pole 8 and holds.
Two supporting columns 9 are distributed on the bottom surface of the translation supporting plate 1, the bottom of each supporting column 9 is located in the middle of the top surface of the corresponding supporting base 10, and the supporting effect of the corresponding supporting base 10 on the corresponding supporting columns 9 is increased.
The telescopic block 11 is of a telescopic structure on the supporting base 10 through the hydraulic rod 28, the telescopic distance of the telescopic block 11 is smaller than half of the height of the positioning hole 30, and the length of the telescopic block 11 is larger than that of the connecting rod 31, so that the roller 12 is conveniently lifted.
The rollers 12 are distributed on the outer side of the supporting base 10 in two numbers, the length of the roller 12 is less than the width of the supporting base 10, and the roller 12 is fixedly connected with the bottom surface of the supporting base 10 through a connecting rod 31, so that the device can be moved conveniently through the roller 12.
The height of the positioning hole 30 is equal to the height of the telescopic block 11, the inner diameter of the positioning hole 30 is equal to the outer diameter of the positioning rod 27, and the length of the positioning rod 27 is equal to the height of the positioning hole 30, so that the lifting of the telescopic block 11 is limited by the positioning rod 27.
The working principle of the embodiment is as follows: when the positioning and adjusting auxiliary installation device for electromechanical equipment installation is used, firstly, the device can be moved to a place needing to be used through the idler wheel 12, the hydraulic rod 28 is started, the hydraulic rod 28 pushes the telescopic block 11 downwards, the telescopic block 11 is enabled to descend gradually in the supporting base 10, meanwhile, the telescopic block 11 slides downwards on the positioning rod 27 through the positioning hole 30, the telescopic block 11 is enabled to be gradually contacted with the ground and lift the idler wheel 12 until the idler wheel 12 completely leaves the ground, and the supporting base 10 is supported through the telescopic block 11.
Then, a second motor 21 is started, the second motor 21 drives a second threaded rod 22 to rotate, the second threaded rod 22 pushes a moving block 3 to slide in a moving groove 19 through a third threaded hole 25, the moving block 3 drives a supporting platform 6 to move to the position right above the electromechanical device, a lifting rod 4 is driven to rotate on the moving block 3 through a lifting base 5, the lifting rod 4 descends on the moving block 3 through a first threaded hole 24, the lifting base 5 descends in a groove on a supporting column 9 through a limiting cross rod 32, a clamping rod 8 on the supporting platform 6 descends to the position of the electromechanical device, a first motor 7 is started, the first motor 7 drives a first threaded rod 15 to rotate, the first threaded rod 15 drives two clamping rods 8 to reversely move in a clamping groove 13 through threads, the movement of the clamping rods 8 is limited through a sliding supporting rod 14, the clamping rods 8 interact to clamp the electromechanical device, the electromechanical equipment is assisted by the protruding rod 16, then the electromechanical equipment is lifted to a certain height by the lifting of the lifting rod 4, the hydraulic rod 28 is started, the hydraulic rod 28 drives the telescopic block 11 to be lifted to the original position, the device can be moved by the rolling of the roller 12, the electromechanical equipment is moved to a proper place for inspection and maintenance, and the electromechanical equipment can be installed at the proper place to complete the use of the device in this time in the same way, and the content which is not described in detail in the specification belongs to the prior art which is known by technicians in the field.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof.
Claims (7)
1. The utility model provides an electromechanical device installation is with supplementary installation device that can fix a position adjustment, includes translation backup pad (1), movable block (3), lifter (4), supporting platform (6), adds and holds pole (8) and connecting rod (31), its characterized in that: a through groove (2) is formed in the translation supporting plate (1), a moving block (3) is arranged on the translation supporting plate (1), a longitudinal first threaded hole (24) is formed in the moving block (3), the lifting rod (4) penetrates through the first threaded hole (24), a lifting base (5) is arranged at the lower end of the lifting rod (4), a lifting motor is arranged in the lifting base (5), an output shaft of the lifting motor is connected with the lifting rod (4), a supporting platform (6) is arranged at the bottom of the lifting base (5), a first motor (7) is arranged at the side part of the supporting platform (6), a clamping groove (13) is formed in the supporting platform (6), a sliding supporting rod (14) is arranged in the clamping groove (13), a first threaded rod (15) is arranged on the first motor (7), a second threaded hole (17) is formed in the clamping rod (8), a sliding hole (18) is formed in the clamping rod (8), the first threaded rod (15) penetrates through the second threaded hole (17), the sliding support rod (14) penetrates through the sliding hole (18), the protruding rod (16) is installed on the clamping rod (8), a moving groove (19) is formed in the translational support plate (1) below the through groove (2), a placing groove (20) is formed in the bottom of the moving groove (19), the moving block (3) is arranged in the placing groove (20), a second motor (21) is arranged at the end of the translational support plate (1), a second threaded rod (22) is installed on the second motor (21), a limiting plate (23) is installed on the moving block (3), the limiting plate (23) is arranged in the moving groove (19) in a sliding mode, and a transverse third threaded hole (25) is formed in the moving block (3), the second threaded rod (22) penetrates through the third threaded hole (25), the translation supporting plate (1) is fixedly connected with the supporting column (9), the supporting base (10) is installed at the bottom of the supporting column (9), the lifting base (5) is provided with a limiting cross rod (32), and the limiting cross rod (32) is connected with the supporting column (9) in a sliding mode.
2. The positionable and adjustable auxiliary mounting apparatus for mounting electromechanical equipment according to claim 1, wherein: the width of the moving block (3) is equal to that of the placing groove (20).
3. The positionable and adjustable auxiliary mounting apparatus for mounting electromechanical equipment according to claim 1, wherein: the outer diameter of the lifting rod (4) is smaller than the width of the through groove (2), and the axis of the lifting rod (4) is overlapped with the vertical center line of the moving block (3).
4. The positionable and adjustable auxiliary mounting device for mounting electromechanical equipment according to claim 1, wherein: add and hold pole (8) and distribute two sets of on supporting platform (6), and every group adds and holds pole (8) and all install on a first threaded rod (15) to the screw thread opposite direction of the first threaded rod (15) left and right sides.
5. The positionable and adjustable auxiliary mounting apparatus for mounting electromechanical equipment according to claim 1, wherein: support base (10) bottom and be provided with flexible piece (11), and support base (10) bottom and be provided with gyro wheel (12), flexible groove (26) have been seted up to support base (10) bottom, be provided with hydraulic stem (28) in flexible groove (26), spread groove (29) have been seted up on flexible piece (11), hydraulic stem (28) are located in spread groove (29).
6. The positionable and adjustable auxiliary mounting apparatus for mounting electromechanical equipment according to claim 1, wherein: two supporting columns (9) are distributed on the bottom surface of the translation supporting plate (1), and the bottom of each supporting column (9) is located in the middle of the top surface of the supporting base (10).
7. The positionable and adjustable auxiliary mounting apparatus for mounting an electromechanical device according to claim 5, wherein: the two rollers (12) are distributed on the outer side of the supporting base (10), the length of each roller (12) is smaller than the width of the supporting base (10), and the rollers (12) are fixedly connected with the bottom surface of the supporting base (10) through connecting rods (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210560112.7A CN114920148A (en) | 2022-05-19 | 2022-05-19 | Positioning and adjusting auxiliary mounting device for mounting electromechanical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210560112.7A CN114920148A (en) | 2022-05-19 | 2022-05-19 | Positioning and adjusting auxiliary mounting device for mounting electromechanical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114920148A true CN114920148A (en) | 2022-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210560112.7A Pending CN114920148A (en) | 2022-05-19 | 2022-05-19 | Positioning and adjusting auxiliary mounting device for mounting electromechanical equipment |
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| Country | Link |
|---|---|
| CN (1) | CN114920148A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117246915A (en) * | 2023-11-17 | 2023-12-19 | 山西路桥第八工程有限公司 | Crane device for road bridge construction |
-
2022
- 2022-05-19 CN CN202210560112.7A patent/CN114920148A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117246915A (en) * | 2023-11-17 | 2023-12-19 | 山西路桥第八工程有限公司 | Crane device for road bridge construction |
| CN117246915B (en) * | 2023-11-17 | 2024-01-30 | 山西路桥第八工程有限公司 | Crane device for road bridge construction |
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