High-ferric large station building high-altitude working platform

Abstract

This invention discloses a high-altitude work platform for large high-speed railway stations, belonging to the field of civil engineering equipment technology. It includes a support base with foundation protection mechanisms on both sides of its top surface, and extension sections slidably connected at both ends. Extension sections are equipped with extension protection mechanisms. A drive unit is fixed to the bottom surface of the support base to drive the extension sections to extend and retract. The drive unit drives the support plate to extend and retract horizontally along a sliding groove, achieving flexible expansion of the working space. The extension protection mechanism is linked to the extension section through a driven linkage mechanism, expanding or retracting synchronously with the extension to form continuous protection. Storage sections on both sides of the support base feature a foldable storage design, allowing for the orderly storage of tools and consumables, replacing the traditional haphazard stacking method. This invention effectively expands the construction work area, provides a complete and reliable protection system, and the storage sections can orderly store tools and suppress falling objects, eliminating high-altitude safety hazards and significantly improving the construction efficiency and safety level of high-altitude operations in large high-speed railway stations.

Description

Technical Field

[0001] This invention relates to the field of civil engineering equipment technology, and in particular to a high-altitude work platform for large high-speed railway station buildings. Background Technology

[0002] High-speed railway station buildings, as key railway transportation hubs, commonly employ complex structural forms such as high-altitude cantilevered structures, aerial corridors, and large-span steel structures. The main structure often utilizes a combination of reinforced concrete and steel. During the construction of such projects, critical high-altitude operations, including steel pipe column installation, column concrete pouring, steel structure welding, facade decoration, and equipment installation, all rely on stable and reliable aerial work platforms. Traditional construction methods often depend on scaffolding to create temporary work areas, but these methods suffer from long erection periods, low material reuse rates, and poor flexibility. Aerial work platforms, with their reusability, flexible lifting capabilities, and lack of need for repeated disassembly and assembly, are gradually replacing traditional scaffolding and becoming the mainstream equipment for high-altitude operations.

[0003] While existing aerial work platforms have developed technical solutions with expandable work surfaces and storage compartments, they still suffer from significant technical shortcomings in the complex high-altitude construction scenarios of large high-speed railway stations, characterized by large spans, high swaying, and multiple collaborative processes. The platform's expansion structure is mostly an independent telescopic design, lacking synchronous linkage with the safety mechanism. This results in a discontinuous and incomplete safety system in the expanded work area, creating a risk of personnel falling. Existing storage compartments are merely simple storage structures, lacking inertial restraint and fall arrestors. Tools and consumables are still prone to slipping or even falling from heights when the platform starts, stops, brakes, or sways due to wind. Furthermore, the expansion and storage functions are independent and not optimized for coordination, and the simple storage structure further reduces the effective operating space, hindering continuous multi-person operations.

[0004] Therefore, in response to the problems of existing aerial work platforms such as asynchronous expansion and protection, incomplete and continuous protection systems, lack of fall protection constraints during storage, and insufficient adaptability to construction, there is an urgent need to design a new type of aerial work platform that can flexibly expand the working space, has special tool storage and fall protection constraints, and has a reliable linkage of protection structures, so as to meet the requirements of high-altitude construction of large high-speed railway stations for equipment safety, efficiency, and standardization. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a high-altitude work platform for large high-speed railway station buildings.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a high-speed railway large station building high-altitude operation platform, including a bearing base; basic protection mechanisms are fixed on both sides of the top surface of the bearing base, and extension parts are slidably fitted at both ends of the bearing base. Extension protection mechanisms are fixed on the extension parts, and the extension parts are drivenly connected to the drive part, which is fixedly connected to the bottom surface of the bearing base. The support base is also provided with foldable storage compartments on both sides. Each storage compartment includes a base plate, an upright plate, several third connecting rods, and several fourth connecting rods. One side of the base plate is hinged to the side of the support base, and the side of the base plate away from the support base overlaps the step at the bottom of the upright plate. The side of the upright plate near the support base is hinged to one end of several third connecting rods. Several third connecting rods on the same side are arranged vertically at equal intervals along the upright plate. The end of the third connecting rod away from the upright plate is rotatably connected to one end of the fourth connecting rod. The end of the fourth connecting rod away from the third connecting rod is hinged to the foundation protection mechanism.

[0007] Furthermore, the basic protection mechanism includes several third columns and a second crossbeam; several third columns are respectively fixed to both sides of the top surface of the bearing base, and several third columns on the same side are equidistantly arranged along the length direction of the bearing base; the second crossbeam is fixed to the top of all the third columns on the same side, and the fourth connecting rod is hinged to the side of the third column away from the bearing base.

[0008] Furthermore, a fastener is hinged to the top of the upright plate, and the fastener is detachably fastened to the second crossbeam.

[0009] Furthermore, the extension section includes a support plate; the support base has grooves at both ends, the support plate slides horizontally within the grooves, the bottom surface of the support plate is driven to connect with the drive section, and the extension protection mechanism is fixed above the support plate.

[0010] Furthermore, the drive unit includes a hollow output shaft motor, a bidirectional threaded rod, a bearing seat, and two threaded blocks; the hollow output shaft motor is fixedly connected to the bottom surface of the support base, and the output shaft of the hollow output shaft motor is coaxially fixedly connected to the bidirectional threaded rod; the bidirectional threaded rod is rotatably connected to the bottom surface of the support base through the bearing seat; the bottom surface of the support base has a first through groove extending along the length direction, the first through groove is connected to a sliding groove, and the two threaded blocks are respectively threaded to both ends of the bidirectional threaded rod and slide in the first through groove; the top surface of the threaded blocks is fixedly connected to the bottom surface of the support plate.

[0011] Furthermore, the extended protective mechanism includes a fixed protective component and a movable protective component; the fixed protective component includes a plurality of first columns and a third crossbeam, the plurality of first columns are fixedly connected to one end of the bearing plate extending out of the slide groove and are equidistantly arranged along the width direction of the bearing plate, and the third crossbeam is fixedly connected to the top of all the first columns.

[0012] Furthermore, the movable protective assembly includes two first crossbeams and two second columns; the two first crossbeams are respectively slidably fitted inside the two second crossbeams, and one end of the first crossbeam extending out of the second crossbeam is fixedly connected to a third crossbeam; the two second columns are respectively slidably fitted on the bottom surface of the first crossbeams, and the second columns are provided with driven mechanisms, which are respectively connected to the first column at the end and the third column at the end for transmission.

[0013] Furthermore, the driven mechanism includes four first links, four second links, and several short shafts; two of the first links are hinged to the middle of the first column via the same short shaft, and the other two first links are hinged to the middle of the third column via another short shaft; the first links and the second links are rotatably connected via short shafts, and the middle parts of the two second links are rotatably connected to each other via short shafts; a second through groove extending vertically is provided on the second column, and the short shaft at the connection between the first link and the second link slides and engages in the second through groove, and a first limiting block is fixed at the end of the short shaft.

[0014] Furthermore, a third through groove extending along the length direction is provided on the bottom surface of the first crossbeam, and a second limiting block is slidably fitted in the third through groove. The second limiting block is fixedly connected to the top of the second column.

[0015] Furthermore, lifting rings are fixed at both ends of the third crossbeam and both ends of the second crossbeam, and the lifting rings are located on the top surfaces of the third crossbeam and the second crossbeam.

[0016] The beneficial effects of this invention are: This invention addresses the problems of cramped working space, disorganized tool management, and safety hazards associated with traditional high-speed rail station aerial work platforms. The extension sections at both ends of the support base, in conjunction with the drive unit, flexibly expand the platform's working space, effectively solving the problem of insufficient worker positions caused by the insufficient length of the lifting platform and providing more ample operating area. The basic protective mechanism on the top surface of the support base, working in conjunction with the extended protective mechanism on the extension sections, constructs a three-dimensional protective barrier, effectively ensuring the personal safety of construction personnel. The storage sections on both sides of the support base feature a foldable design, allowing for the orderly storage of tools and consumables such as electric drills and wrenches, replacing the traditional haphazard stacking method and improving the work site environment. Furthermore, the internal linkage-connected constraint structure effectively prevents tools and consumables from sliding or falling due to inertia when the lifting platform starts, brakes, or sways in the wind, eliminating the risk of falling objects from heights and ensuring the safety of personnel and equipment below. The complementary functions and synergistic linkage of the various structures significantly improve the efficiency, safety, and management level of aerial work. Attached Figure Description

[0017] Figure 1 This is a front view of the overall structure of an embodiment of the present invention.

[0018] Figure 2 This is a partial sectional view used to illustrate the internal structure in an embodiment of the present invention.

[0019] Figure 3 This is a top view of the overall structure of an embodiment of the present invention.

[0020] Figure 4 This is a three-dimensional perspective view of an embodiment of the present invention.

[0021] In the diagram: 1. Support base; 2. Hollow output shaft motor; 3. Bearing seat; 4. Bidirectional threaded rod; 5. Threaded block; 6. First through groove; 7. Slide groove; 8. Support plate; 9. First column; 10. Second column; 11. Second through groove; 12. First limiting block; 13. Lifting ring; 14. First crossbeam; 15. Third through groove; 16. Second limiting block; 17. Third column; 18. First threaded hole; 19. First connecting rod; 20. Second connecting rod; 21. Short shaft; 22. Second crossbeam; 23. Second threaded hole; 24. Connecting ring; 25. Connecting wire; 26. Screw; 27. Third crossbeam; 28. Base plate; 29. ​​Upright plate; 30. Fastener; 31. Third connecting rod; 32. Fourth connecting rod; 33. Step. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] This invention discloses a high-altitude work platform for large high-speed railway station buildings. Addressing the technical pain points of high-altitude construction in large high-speed railway station buildings, such as limited working space, disorganized tool and material storage, significant risk of falling objects, and insufficient continuity of the protection system, this platform integrates a bidirectional extendable structure, a linked three-dimensional protection system, and a foldable restraint storage mechanism. This enables flexible expansion of the working space, comprehensive safety protection for construction personnel, orderly storage of tools and materials, and inertial fall protection restraint. It can stably adapt to various high-altitude construction scenarios in large high-speed railway station buildings, including steel pipe column connection, column concrete pouring, steel structure welding, and exterior facade construction.

[0024] Reference Figures 1 to 4The high-speed railway large station building aerial work platform uses the load-bearing base 1 as the core basic load-bearing component, providing a rigid support base for the overall structure. The top surface of the load-bearing base 1 is symmetrically fixed with basic protection mechanisms on both sides, forming a lateral protection barrier for the basic work area, effectively preventing construction personnel from falling accidentally. The load-bearing base 1 is symmetrically provided with horizontally sliding extension sections at both ends. The extension sections can extend and retract in both directions along the length of the load-bearing base 1, realizing flexible expansion of the work space and solving the problem of insufficient construction positions in traditional platforms. The extension protection mechanism is fixed on the extension section, and the extension protection mechanism moves synchronously with the extension section, forming a continuous three-dimensional protection system in coordination with the basic protection mechanism, fully covering the basic work area and the extension work area.

[0025] The extension section and the drive section form a drive connection. The drive section is fixed to the bottom surface of the support base 1, providing a stable power input for the extension section's telescopic movement, realizing automated telescopic adjustment of the extension section, and improving the convenience and efficiency of workspace adjustment. Foldable storage sections are also provided on both sides of the support base 1. These storage sections are used to classify and store construction tools and consumables, replacing the traditional random stacking method, freeing up effective workspace, improving the work site environment, and reducing the safety hazard of falling objects from heights.

[0026] The storage section adopts a folding and storage structure design, which combines storage function and anti-fall restraint function. Specifically, it includes a base plate 28, a vertical plate 29, several third connecting rods 31 and several fourth connecting rods 32. One side of the base plate 28 is hinged to the side of the support base 1, which can realize flip-opening and closing, providing a support base for tools and consumables; the side of the base plate 28 away from the support base 1 overlaps on the step 33 at the bottom of the vertical plate 29. The step 33 provides rigid support for the base plate 28, ensuring the structural stability of the storage section when it is unfolded to support tools and consumables. The side of the upright plate 29 closest to the support base 1 is hinged to one end of several third links 31. Several third links 31 on the same side are arranged vertically at equal intervals along the upright plate 29. The end of the third link 31 away from the upright plate 29 is rotatably connected to one end of the fourth link 32. The end of the fourth link 32 away from the third link 31 is hinged to the basic protection mechanism. Through the linkage constraint of the third link 31 and the fourth link 32, a stable link constraint system is formed. When the platform shakes, the displacement of the upright plate 29 and the base plate 28 is restricted, thereby constraining the inertial motion of tools and consumables in the storage section and reducing the risk of falling objects from height.

[0027] The top of the upright plate 29 is hinged with a fastener 30. The fastener 30 and the second crossbeam 22 are detachably fastened together. When the storage section is stored, the upright plate 29 can be fixed to the second crossbeam 22 through the fastener 30, which reduces the space occupied by the platform when it is not in use and improves the overall structural compactness.

[0028] The basic protective structure, serving as the core protective structure of the basic work area, specifically includes several third columns 17 and a second crossbeam 22. The third columns 17 are fixed to both sides of the top surface of the bearing base 1, with the columns 17 on the same side evenly spaced along the length of the bearing base 1 to form a uniformly distributed vertical protective support. The second crossbeam 22 is fixed to the top of all the third columns 17 on the same side, forming a frame-like protective structure with the columns 17, effectively preventing construction personnel from accidentally falling and ensuring construction safety. The fourth connecting rod 32 is hinged to the side of the third column 17 away from the bearing base 1, using the third column 17 as a fixed hinge fulcrum to achieve stable linkage between the storage section and the basic protective structure, ensuring structural stability during the unfolding and retraction of the storage section.

[0029] The extension section is used to achieve bidirectional automated expansion of the platform's working space. It includes a support plate 8, and sliding grooves 7 are provided at both ends of the support base 1. The support plate 8 and the sliding grooves 7 form a horizontal sliding fit, and the sliding grooves 7 provide extension and retraction guidance for the support plate 8 to ensure smooth movement of the extension section. The bottom surface of the support plate 8 is connected to the drive unit, and the extension and retraction actions are completed under the action of the drive unit. The extension protection mechanism is fixed above the support plate 8 and moves synchronously with the support plate 8 to maintain the integrity of the protection system.

[0030] The drive unit provides stable power for the telescopic movement of the extension unit, and includes a hollow output shaft motor 2, a bidirectional threaded rod 4, a bearing seat 3, and two threaded blocks 5. The hollow output shaft motor 2 is fixed to the bottom surface of the support base 1; the output shaft of the hollow output shaft motor 2 is coaxially fixed to the bidirectional threaded rod 4; the bidirectional threaded rod 4 is rotatably connected to the bottom surface of the support base 1 through the bearing seat 3, and the bearing seat 3 provides rotational support for the bidirectional threaded rod 4. The bottom surface of the support base 1 has a first through groove 6 extending along the length direction. The first through groove 6 is connected to the sliding groove 7. Two threaded blocks 5 are respectively threaded to the two ends of the bidirectional threaded rod 4 and form a sliding fit with the first through groove 6. The first through groove 6 restricts the circumferential rotation of the threaded blocks 5, so that they can only make linear sliding motion in the horizontal direction. The top surface of the threaded blocks 5 is fixed to the bottom surface of the support plate 8. When the hollow shaft motor 2 drives the bidirectional threaded rod 4 to rotate, the threaded blocks 5 at both ends make linear motion in opposite directions or towards each other along the bidirectional threaded rod 4, thereby driving the support plate 8 to extend or retract along the sliding groove 7, quickly completing the expansion and contraction of the working space, and meeting the work station requirements of multiple people working together.

[0031] The extended protective mechanism extends and retracts synchronously with the extended section, and includes fixed protective components and movable protective components. The fixed protective components are located at the extended end of the support plate 8, and include several first columns 9 and a third crossbeam 27; the several first columns 9 are fixed to one end of the support plate 8 extending out of the slide groove 7, and are equidistantly arranged along the width direction of the support plate 8; the third crossbeam 27 is fixed to the top of all the first columns 9, and together with the first columns 9, they form a fixed protective frame for the extended area, providing basic vertical protection for the extended work area.

[0032] The movable protective assembly includes two first crossbeams 14 and two second columns 10. The two first crossbeams 14 are respectively slidably engaged with the interior of the two second crossbeams 22. One end of the first crossbeam 14 extending out of the second crossbeam 22 is fixedly connected to the third crossbeam 27 and extends and retracts synchronously with the support plate 8 to achieve continuous extension of the protective crossbeams. The two second columns 10 are respectively slidably engaged with the bottom surface of the first crossbeams 14. The second columns 10 are equipped with driven mechanisms, which are respectively connected to the first column 9 at the end and the third column 17 at the end to achieve synchronous linkage between the movable protective assembly and the extension section, ensuring the overall continuity of the protective system.

[0033] The first crossbeam 14 has a first threaded hole 18, and the second crossbeam 22 has a second threaded hole 23. The first threaded hole 18 and the second threaded hole 23 are adapted to each other. When the first crossbeam 14 extends into the second crossbeam 22 to its limit, the first threaded hole 18 and the second crossbeam 22 are correspondingly set. The screw 26 is threaded into the second threaded hole 23 and the first threaded hole 18. When expansion is needed, the screw 26 can be unscrewed. A connecting ring 24 is fixed to the side wall of the second crossbeam 22. The connecting ring 24 is connected to the screw 26 through the connecting line 25. The screw 26 will not fall off after disassembly and does not need to be stored separately.

[0034] The driven mechanism includes four first links 19, four second links 20, and several short shafts 21. Two of the first links 19 are hinged to the middle of the first column 9 via the same short shaft 21, and the other two first links 19 are hinged to the middle of the third column 17 via another short shaft 21. The first links 19 and the second links 20 are rotatably connected via the short shafts 21, and the middle parts of the two second links 20 are rotatably connected to each other via the short shafts 21, forming a scissor-type linkage transmission structure. The second column 10 has a second through slot 11 extending vertically. The short shaft 21 at the connection between the first link 19 and the second link 20 forms a sliding fit with the second through slot 11. A first limiting block 12 is fixed at the end of the short shaft 21, which prevents the short shaft 21 from disengaging from the second through slot 11, ensuring the stability and reliability of the linkage transmission structure. When the extension section extends, the distance between the first column 9 and the third column 17 gradually increases, driving the first connecting rod 19 and the second connecting rod 20 to rotate relative to each other. The short shaft 21 slides vertically along the second through groove 11, thereby pushing the second column 10 to slide horizontally along the first crossbeam 14, so that the movable protective components unfold synchronously with the extension section, fully ensuring the construction safety of the extension operation area.

[0035] To further improve the sliding stability of the movable protective component, a third through groove 15 extending along the length direction is provided on the bottom surface of the first crossbeam 14. A second limiting block 16 is slidably fitted in the third through groove 15. The second limiting block 16 is fixedly connected to the top of the second column 10. The third through groove 15 and the second limiting block 16 cooperate to provide sliding guidance for the second column 10, while preventing the second column 10 from falling off the first crossbeam 14, thereby strengthening the structural strength and movement stability of the movable protective component.

[0036] Lifting rings 13 are fixed at both ends of the third crossbeam 27 and both ends of the second crossbeam 22. The lifting rings 13 are located on the top surface of the third crossbeam 27 and the second crossbeam 22. The lifting rings 13 are used to connect with the external lifting and suspension mechanism to realize the lifting and moving of the platform along the facade of the high-speed railway large station building. It can flexibly adapt to the high-altitude operation needs of different heights and different work positions, and improve the applicability and construction flexibility of the platform.

[0037] The working principle of the high-altitude work platform for large high-speed railway stations is as follows: When performing high-altitude work, the hollow output shaft motor 2 is started first. The output shaft of the motor rotates and drives the bidirectional threaded rod 4 to rotate synchronously. Under the action of threaded transmission, the two threaded blocks 5 move in opposite directions along the first through groove 6, thereby pushing the two side bearing plates 8 to extend horizontally from the sliding grooves 7 at both ends of the bearing base 1, completing the bidirectional expansion of the platform's working space and meeting the work requirements of multi-position and large operating space for high-altitude construction of large high-speed railway stations.

[0038] As the support plate 8 extends, the extended protective mechanism unfolds synchronously with the extension section: the first column 9 and the third crossbeam 27 of the fixed protective component move forward synchronously with the support plate 8, and the first crossbeam 14, which is fixed to the third crossbeam 27, slides smoothly out from inside the second crossbeam 22; the driven mechanism is linked as the distance between the first column 9 and the third column 17 increases, the first connecting rod 19 rotates around the hinge point, driving the second connecting rod 20 to move synchronously, and the short axis 21 connecting the first connecting rod 19 and the second connecting rod 20 slides vertically along the second through groove 11 on the second column 10, thereby pushing the second column 10 to slide horizontally along the first crossbeam 14, so that the movable protective component and the extension section expand synchronously, and finally form a continuous three-dimensional protective barrier with the basic protective mechanism and the fixed protective component to ensure the safety of construction personnel.

[0039] Then the storage section is unfolded, the upright plate 29 is pulled outward, and the base plate 28 is flipped around the hinge point with the bearing base 1, with its free end overlapping the step 33 at the bottom of the upright plate 29, forming a stable tool bearing structure; the tools and consumables used in construction are placed in an orderly manner on the base plate 28.

[0040] After the work is completed, the hollow output shaft motor 2 is started in reverse, and the bidirectional threaded rod 4 reverses to drive the threaded block 5 to move in opposite directions in a straight line. The bearing plate 8 retracts along the slide groove 7 to its initial position. The movable protective component retracts synchronously with the bearing plate 8, the first crossbeam 14 retracts into the second crossbeam 22, the second column 10 resets, and the protective system returns to its initial state. Then, the storage part is folded and stored, the bottom plate 28 is flipped upward to detach it from the step 33, and the upright plate 29 is pushed to fold towards the basic protective mechanism. The upright plate 29 is detachably fastened and fixed to the second crossbeam 22 by the fastener 30, and the platform as a whole returns to its compact initial shape. Finally, the platform is suspended and moved to the next working position by connecting the lifting ring 13 to the external lifting suspension mechanism, so that subsequent construction work can be carried out, realizing continuous high-altitude operation at multiple work positions.

[0041] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0042] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A high-speed railway large station building aerial work platform, comprising a support base (1) and an extension section; wherein a foundation protection mechanism is fixedly provided on both sides of the top surface of the support base (1), characterized in that: The extension section is slidably fitted to both ends of the support base (1). An extension protection mechanism is fixedly provided on the extension section. The extension section is drivenly connected to the drive section. The drive section is fixedly connected to the bottom surface of the support base (1). The support base (1) is also provided with foldable storage sections on both sides. The storage section includes a base plate (28), a vertical plate (29), several third connecting rods (31), and several fourth connecting rods (32). One side of the base plate (28) is hinged to the side of the support base (1). 28) The side away from the bearing base (1) is attached to the step (33) at the bottom of the upright plate (29); the side of the upright plate (29) close to the bearing base (1) is hinged to one end of several third connecting rods (31), and several third connecting rods (31) on the same side are arranged vertically at equal intervals along the upright plate (29). The end of the third connecting rod (31) away from the upright plate (29) is rotatably connected to one end of the fourth connecting rod (32), and the end of the fourth connecting rod (32) away from the third connecting rod (31) is hinged to the foundation protection mechanism.

2. The high-altitude work platform for large high-speed railway station buildings according to claim 1, characterized in that: The basic protective mechanism includes several third columns (17) and a second crossbeam (22); several third columns (17) are respectively fixed to both sides of the top surface of the bearing base (1), and several third columns (17) on the same side are equidistantly arranged along the length direction of the bearing base (1); the second crossbeam (22) is fixed to the top of all the third columns (17) on the same side, and the fourth connecting rod (32) is hinged to the side of the third column (17) away from the bearing base (1).

3. The high-altitude work platform for large high-speed railway station buildings according to claim 2, characterized in that: The top of the upright plate (29) is hinged with a fastener (30), which is detachably fastened to the second crossbeam (22).

4. The high-altitude work platform for large high-speed railway station buildings according to claim 2, characterized in that: The extension section includes a support plate (8); the support base (1) has grooves (7) at both ends, the support plate (8) slides horizontally in the grooves (7), the bottom surface of the support plate (8) is driven to connect with the drive unit, and the extension protection mechanism is fixed above the support plate (8).

5. A high-altitude work platform for large high-speed railway station buildings according to claim 4, characterized in that: The drive unit includes a hollow output shaft motor (2), a bidirectional threaded rod (4), a bearing seat (3), and two threaded blocks (5); the hollow output shaft motor (2) is fixed to the bottom surface of the bearing base (1), and the output shaft of the hollow output shaft motor (2) is coaxially fixed to the bidirectional threaded rod (4). The bidirectional threaded rod (4) is rotatably connected to the bottom surface of the bearing base (1) through the bearing seat (3); the bottom surface of the bearing base (1) is provided with a first through groove (6) extending along the length direction. The first through groove (6) is connected to the sliding groove (7). The two threaded blocks (5) are respectively threaded to the two ends of the bidirectional threaded rod (4) and slide in the first through groove (6). The top surface of the threaded block (5) is fixed to the bottom surface of the bearing plate (8).

6. The high-altitude work platform for large high-speed railway station buildings according to claim 4, characterized in that: The extended protection mechanism includes a fixed protection component and a movable protection component; the fixed protection component includes a plurality of first columns (9) and a third crossbeam (27), the plurality of first columns (9) are fixed to one end of the bearing plate (8) extending out of the slide groove (7) and are equidistantly arranged along the width direction of the bearing plate (8), and the third crossbeam (27) is fixed to the top of all the first columns (9).

7. The high-altitude work platform for large high-speed railway station buildings according to claim 6, characterized in that: The active protective assembly includes two first crossbeams (14) and two second columns (10); the two first crossbeams (14) are respectively slidably fitted inside the two second crossbeams (22), and one end of the first crossbeam (14) extending out of the second crossbeam (22) is fixedly connected to the third crossbeam (27); the two second columns (10) are respectively slidably fitted on the bottom surface of the first crossbeams (14), and the second columns (10) are provided with driven mechanisms, which are respectively connected to the first column (9) at the end and the third column (17) at the end.

8. A high-altitude work platform for large high-speed railway station buildings according to claim 7, characterized in that: The driven mechanism includes four first links (19), four second links (20), and several short shafts (21); two of the first links (19) are hinged to the middle of the first column (9) through the same short shaft (21), and the other two first links (19) are hinged to the middle of the third column (17) through another short shaft (21); the first links (19) and the second links (20) are rotatably connected through the short shaft (21), and the middle parts of the two second links (20) are rotatably connected to each other through the short shaft (21); a second through groove (11) extending vertically is provided on the second column (10), and the short shaft (21) at the connection between the first link (19) and the second link (20) slides and engages in the second through groove (11), and a first limiting block (12) is fixed at the end of the short shaft (21).

9. A high-altitude work platform for large high-speed railway station buildings according to claim 7, characterized in that: The bottom surface of the first crossbeam (14) is provided with a third through groove (15) extending along the length direction. A second limiting block (16) is slidably fitted in the third through groove (15). The second limiting block (16) is fixedly connected to the top of the second column (10).

10. A high-altitude work platform for large high-speed railway station buildings according to claim 7, characterized in that: Lifting rings (13) are fixed at both ends of the third crossbeam (27) and both ends of the second crossbeam (22), and the lifting rings (13) are located on the top surfaces of the third crossbeam (27) and the second crossbeam (22).

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