Assembly structure of operation safety protection platform

Abstract

The invention discloses an assembly structure of an operation safety protection platform, and relates to the technical field of protection platforms, the assembly structure comprises a support frame, the whole support frame is X-shaped, and fixing mechanisms are arranged at the four ends of the support frame; wherein the fixing mechanism comprises square shell cylinders, and one end of each of the four square shell cylinders is fixed to one end of the supporting frame. According to the device, the two first arc-shaped blocks and the two second arc-shaped blocks penetrate into the platform support and can form a complete circular ring in the platform support, the diameter of the circular ring is larger than that of the positioning hole, and then the moving assembly pulls the whole cylinder back into the square shell barrel; the supporting frame is connected with the platform support till the two first arc-shaped blocks and the two second arc-shaped blocks make contact with the inner wall of the platform support to form a riveting structure, the connecting strength of the supporting frame and the platform support is improved, meanwhile, the bending strength of the platform support can be improved through the X-shaped structure of the supporting frame, the protective net can also horizontally move to the platform support, and the dismounting and mounting modes are simple and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of protection platforms, and in particular to an assembly structure of an operation safety protection platform. Background Art

[0002] The attached lifting work protection platform (i.e. climbing frame) used in construction refers to a frame erected at a certain height and attached to the building structure. Relying on its own lifting equipment and devices, it can gradually climb or descend with the building structure. It is a construction work platform with safety protection, anti-tilt, anti-fall and synchronous lifting.

[0003] After searching, the patent document with the authorization announcement number CN217537803U discloses a climbing frame protection net connection structure, including a climbing frame net unit. Adjacent climbing frame net units are connected by connecting uprights. The climbing frame net units are fixedly connected to the connecting uprights by vertical fixing mechanisms and horizontal fixing mechanisms respectively. The vertical fixing mechanism is a plurality of latch connection components, and the horizontal fixing mechanism is a plurality of movable limiting components. The horizontal limiting and connection are achieved through the limiting activity of the movable limiting components. This patent proposes a climbing frame protection net connection structure, which is simple to operate, convenient to install and disassemble, does not require installation tools, and has high installation efficiency. There are no scattered parts, which are not easy to lose, and can reduce loss costs.

[0004] The above-mentioned protective net connection structure is a kind of assembly structure of the climbing frame, but the above-mentioned invention has the following shortcomings: quick positioning and installation are carried out by connecting with positioning pins. In actual life, the climbing frame is a multi-layer structure. Using the above-mentioned installation method, each upper and lower adjacent protective nets are in contact with each other. If the protective net of a certain layer (not the top layer) is damaged, it is necessary to disassemble the protective nets one by one from top to bottom until the damaged protective net is replaced. This is too troublesome and affects the construction progress. At the same time, the positioning pin connection method cannot improve the connection strength with the platform bracket. Summary of the invention

[0005] The purpose of the present invention is to provide an assembly structure of a work safety protection platform to solve the problems raised in the above background technology.

[0006] The technical solution of the present invention is: an assembly structure of a work safety protection platform, comprising a support frame, the support frame is in an X shape as a whole, and the four ends of the support frame are provided with fixing mechanisms;

[0007] Among them, the fixing mechanism includes a square shell cylinder, one end of the four square shell cylinders is respectively fixed to one end of the support frame, the other end of the square shell cylinder is provided with a circular hole, and a cylinder is arranged in the circular hole, and a moving mechanism for moving the cylinder is arranged inside the square shell cylinder, two guide plates are fixed on the upper and lower sides and the left and right sides of the cylinder, an extension rod is arranged between the two guide plates on each side, a first arc block is fixed to one end of the extension rods on the upper and lower sides, and a second arc block is fixed to one end of the extension rods on the left and right sides, the two first arc blocks and the two second arc blocks can form a complete circular ring, and a guide with an L-shaped track is provided on the outer side of the guide plate The cam is provided with a first movable plate and a second movable plate, and the two ends of the first movable plate are respectively rotatably installed with the extension rods on the left and right sides, and the two ends of the first movable plate are respectively rotatably installed with the extension rods on the upper and lower sides, and the two ends of the first movable plate are respectively rotatably installed with the extension rods on the upper and lower sides, and a second connecting rod is installed, a sliding column is slidably inserted at the middle position of the second movable plate, one end of the sliding column is fixed at the middle position of the first movable plate, and a limiting plate is fixed at the other end of the sliding column, a spring is provided on the outside of the sliding column, and a pushing mechanism that applies thrust to the first movable plate is provided in the cylinder.

[0008] Preferably, the moving mechanism includes a first fixed block, a second fixed block, a guide column and a threaded column, the first fixed block and the second fixed block are both fixed on the outside of the cylinder, the two ends of the guide column are respectively fixed on the two ends inside the square shell cylinder, the first fixed sliding sleeve is arranged on the guide column, the two ends of the threaded column are respectively rotatably installed on the two ends inside the square shell cylinder, a first threaded hole is opened on the outside of the second fixed block, and the outside of the threaded column is installed in the first threaded hole through threads.

[0009] Preferably, the pushing mechanism includes a threaded rod and a connecting frame, one end of the connecting frame is fixed to the first movable plate, one end of the cylinder is provided with a first rotating hole, one end of the threaded rod is rotatably installed in the first rotating hole, a second threaded hole is provided on the outer side of the connecting frame, and the outer side of the threaded rod is installed in the second threaded hole through threads.

[0010] Preferably, a third rotating hole is opened at one end of the square shell tube, and a spline sleeve is rotatably installed in the third rotating hole. A spline shaft integrally formed with the threaded rod is fixed at one end of the threaded rod, and the spline shaft is slidably inserted in the spline sleeve.

[0011] Preferably, the support frame is a hollow structure, a fourth rotating hole is opened in the middle of the support frame, and a rotating cylinder is rotatably installed in the fourth rotating hole, a toggle ring coaxially arranged therewith is fixed to one end of the rotating cylinder, a first bevel gear coaxially arranged therewith is fixed to one end of the rotating cylinder, an intermediate plate is fixed in the four ends of the support frame, a fifth rotating hole is opened on the outer side of the intermediate plate, and a first transmission rod is rotatably installed in the fifth rotating hole, a first sub-bevel gear coaxially arranged therewith is fixed to one end of the first transmission rod, and the first sub-bevel gear is meshed with the first bevel gear, and a first universal shaft is fixed between the other end of the first transmission rod and the spline sleeve.

[0012] Preferably, an inner column is rotatably installed inside the rotating cylinder, and two rotating shafts located on both sides of the inner column are rotatably installed at the middle position of the supporting frame, a first gear coaxially arranged therewith is fixed to one end of the inner column, a second gear coaxially arranged therewith is fixed to one end of the rotating shaft, the first gear is meshed with the second gear, a second bevel gear coaxially arranged therewith is fixed to the outer side of the rotating shaft, a sixth rotating hole is opened on the outer side of the intermediate plate, and a second transmission rod is rotatably installed in the sixth rotating hole, a second sub-bevel gear coaxially arranged therewith is fixed to one end of the second transmission rod, the second sub-bevel gear is meshed with the second bevel gear on the same side thereof, and a second universal shaft is fixed to the other end of the second transmission rod together with the threaded column on the same side thereof.

[0013] Preferably, a third arc block is fixed on the outer side of the first arc block, which is coaxially arranged with the first arc block and has a smaller diameter than the first arc block, and a fourth arc block is fixed on the outer side of the second arc block, which is coaxially arranged with the second arc block and has a smaller diameter than the second arc block, and the two third arc blocks and the two fourth arc blocks can form a complete circular ring.

[0014] Preferably, a guide cylinder coaxially arranged with the sliding column is fixed on the outer side of the second movable plate, and the spring is sleeved on the outer side of the guide cylinder.

[0015] The present invention improves the assembly structure of the work safety protection platform provided here, and has the following improvements and advantages compared with the prior art:

[0016] First, in the present invention, the two first arc blocks and the two second arc blocks are inserted into the platform bracket and can form a complete circular ring in the platform bracket. The diameter of the circular ring is larger than the diameter of the positioning hole. Then, the moving assembly pulls the entire cylinder back into the square shell cylinder until the two first arc blocks and the two second arc blocks are in contact with the inner wall of the platform bracket to form a riveted structure, thereby improving the connection strength between the support frame and the platform bracket. At the same time, the X-shaped structure of the support frame can improve the bending strength of the platform bracket, and the protective net can also be translated to the platform bracket. The disassembly and installation methods are simple and convenient.

[0017] Second, in the present invention, the four fixing mechanisms can work synchronously, which simplifies the installation process of the protection net without the need for tools, thereby further improving the installation efficiency of the entire protection platform;

[0018] Second: In the present invention, when the two first arc blocks and the two second arc blocks are inserted into the platform bracket, the two third arc blocks and the two fourth arc blocks can form a circular ring that can fill the positioning hole, so that the support frame will not shake on the platform bracket, further improving the connection strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the support frame of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the front middle area of ​​the support frame of the present invention;

[0023] Figure 4 It is a schematic diagram of the internal structure of the rear middle area of ​​the support frame of the present invention;

[0024] Figure 5 For the present invention Figure 3 A schematic diagram of a top sectional structure;

[0025] Figure 6 For the present invention Figure 2 Schematic diagram of the local structure;

[0026] Figure 7 It is a schematic diagram of the internal structure of the fixing mechanism of the present invention;

[0027] Figure 8 It is a schematic diagram of the side cross-sectional structure of the fixing mechanism of the present invention;

[0028] Fig. 9 For the present invention Figure 8 A schematic diagram of the enlarged structure at point A;

[0029] Fig.10 It is a schematic diagram of a top sectional structure of the fixing mechanism of the present invention.

[0030] Reference numerals:

[0031] 1. Support frame; 2. Fixing mechanism; 3. First transmission rod; 4. Second transmission rod; 5. Driving ring; 6. Inner column; 7. First bevel gear; 8. First cardan shaft; 9. First secondary bevel gear; 10. Second cardan shaft; 11. Second secondary bevel gear; 12. Second bevel gear; 13. First gear; 14. Rotating shaft; 15. Second gear; 16. Rotating cylinder; 17. Intermediate plate; 18. Square shell cylinder; 19. Guide column; 20. First fixing block; 21. Threaded column; 22. Second fixed block; 23. Cylinder; 24. Guide plate; 25. First arc block; 26. Second arc block; 27. Third arc block; 28. Fourth arc block; 29. ​​Extension rod; 30. Threaded rod; 31. Spline shaft; 32. Spline sleeve; 33. Connecting frame; 34. First connecting rod; 35. Guide groove; 36. First movable plate; 37. Guide cylinder; 38. Spring; 39. Sliding column; 40. Limiting plate; 41. Second movable plate; 42. Second connecting rod. DETAILED DESCRIPTION

[0032] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The present invention provides an assembly structure of a work safety protection platform through improvement. The technical solution of the present invention is:

[0034] like Figures 1 to 10 As shown, the embodiment of the present invention provides an assembly structure of a work safety protection platform, including a support frame 1, the support frame 1 is in an X shape (such as Figure 2 shown), combined with the attached Figure 1 , the existing protective net is fixed to the support frame 1 by bolts, and the four ends of the support frame 1 are provided with fixing mechanisms 2;

[0035] Among them, combined with Figure 7-10As shown, the fixing mechanism 2 includes a square shell cylinder 18, one end of each of the four square shell cylinders 18 is fixed to one end of the support frame 1, a circular hole is provided at the other end of the square shell cylinder 18, and a cylinder 23 is arranged in the circular hole, and a moving mechanism for moving the cylinder 23 is arranged inside the square shell cylinder 18, two guide plates 24 are fixed on the upper and lower sides and the left and right sides of the cylinder 23, and an extension rod 29 is arranged between the two guide plates 24 on each side, and a first arc block 25 is fixed at one end of the extension rod 29 on the upper and lower sides, and a second arc block 26 is fixed at one end of the extension rod 29 on the left and right sides, and the two first arc blocks 25 and the two second arc blocks 26 can form a complete ring, and a guide groove 35 with an L-shaped track is provided on the outer side of the guide plate 24, and A cylindrical block is slidably arranged in the guide groove 35, one end of which is fixedly mounted on the extension rod 29, a first movable plate 36 and a second movable plate 41 are arranged in the cylinder 23, two ends of the first movable plate 36 are respectively rotatably mounted with the extension rods 29 on the left and right sides, a first connecting rod 34 is respectively rotatably mounted with the two ends of the first movable plate 36, a second connecting rod 42 is respectively rotatably mounted with the extension rods 29 on the upper and lower sides, a sliding column 39 is slidably inserted in the middle position of the second movable plate 41, one end of the sliding column 39 is fixed at the middle position of the first movable plate 36, the other end of the sliding column 39 is fixed with a limiting plate 40, a spring 38 is arranged on the outer side of the sliding column 39, and a pushing mechanism for applying thrust to the first movable plate 36 is arranged in the cylinder 23;

[0036] Through the above connection relationship, it can be known that the technical solution of the present invention is that positioning holes are opened on both sides of the platform bracket. The worker holds the support frame 1 and aligns the fixing mechanisms 2 on the four ends of the support frame 1 with the positioning holes. At this time, the pushing mechanism applies a thrust to the first movable plate 36, so that the first movable plate 36 moves. The first movable plate 36 pushes the second movable plate 41 with the help of the spring 38. At this time, the first movable plate 36 and the second movable plate 41 move synchronously. Figure 7, since the second movable plate 41 is located in front of the first movable plate 36, the second connecting rod 42 on the second movable plate 41 first extends the upper and lower extension rods 29 into the corners of the guide groove 35. When the cylindrical block on the upper or lower extension rod 29 contacts the end point of the guide groove 35, the extension rod 29 cannot move, that is, the first arc block 25 passes through the positioning hole and penetrates into the platform bracket. At this time, the first movable plate 36 continues to move, the spring 38 is compressed, and the sliding column 39 on the first movable plate 36 moves relative to the second movable plate 41. At this time, the first connecting rod on the second movable plate 41 extends the left and right sides. The rod 29 first enters the corner of the guide groove 35 until the two first arc blocks 25 and the two second arc blocks 26 can form a complete circular ring whose diameter is larger than the diameter of the positioning hole. Then the moving assembly pulls the entire cylinder 23 back into the square shell cylinder 18 until the two first arc blocks 25 and the two second arc blocks 26 are in contact with the inner wall of the platform bracket to form a riveted structure, thereby improving the connection strength between the support frame 1 and the platform bracket. At the same time, the X-shaped structure of the support frame 1 can improve the bending strength of the platform bracket, and the protective net can also be translated to the platform bracket. The disassembly and installation methods are simple and convenient.

[0037] Specifically, the moving mechanism includes a first fixed block 20, a second fixed block 22, a guide column 19 and a threaded column 21. The first fixed block 20 and the second fixed block 22 are both fixed to the outside of the cylinder 23. The two ends of the guide column 19 are respectively fixed to the two ends in the square shell cylinder 18. The first fixed sliding sleeve is arranged on the guide column 19. The two ends of the threaded column 21 are respectively rotatably mounted on the two ends in the square shell cylinder 18. The outer side of the second fixed block 22 is provided with a first threaded hole. The outer side of the threaded column 21 is threadedly mounted in the first threaded hole.

[0038] Compensation description of the above-mentioned threaded rod 30 is provided, the threads of every two adjacent threaded columns 21 are opposite;

[0039] It can be seen from the above connection relationship that the arrangement of the threaded column 21 and the guide column 19 enables the cylinder 23 to move linearly only in the square shell cylinder 18. When the threaded column 21 rotates, the threaded column 21 moves the cylinder 23 through thread transmission.

[0040] Specifically, the pushing mechanism includes a threaded rod 30 and a connecting frame 33, one end of the connecting frame 33 is fixed to the first moving plate 36, one end of the cylinder 23 is provided with a first rotating hole, one end of the threaded rod 30 is rotatably installed in the first rotating hole, a second threaded hole is provided on the outer side of the connecting frame 33, and the outer side of the threaded rod 30 is threadedly installed in the second threaded hole;

[0041] Compensation description of the above-mentioned threaded rods 30 is provided, and the threads of each adjacent threaded rod 30 are opposite;

[0042] It can be known from the above connection relationship that when the threaded rod 30 rotates, the threaded rod 30 drives the connecting frame 33 to move through the threaded transmission, and the connecting frame 33 drives the first moving plate 36 fixed thereto to move.

[0043] Specifically, a third rotating hole is opened at one end of the square shell tube 18, and a spline sleeve 32 is rotatably installed in the third rotating hole. A spline shaft 31 with an integral structure is fixed at one end of the threaded rod 30, and the spline shaft 31 is slidably inserted in the spline sleeve 32.

[0044] It can be known from the above connection relationship that when the spline sleeve 32 rotates, the spline sleeve 32 causes the threaded rod 30 to rotate through the spline shaft 31 plugged therein.

[0045] Specifically, the support frame 1 is a hollow structure, a fourth rotating hole is opened in the middle of the support frame 1, and a rotating cylinder 16 is rotatably installed in the fourth rotating hole, a toggle ring 5 coaxially arranged therewith is fixed to one end of the rotating cylinder 16, a first bevel gear 7 coaxially arranged therewith is fixed to one end of the rotating cylinder 16, an intermediate plate 17 is fixed to the four ends of the support frame 1, a fifth rotating hole is opened on the outer side of the intermediate plate 17, and a first transmission rod 3 is rotatably installed in the fifth rotating hole, a first sub-bevel gear 9 coaxially arranged therewith is fixed to one end of the first transmission rod 3, and the first sub-bevel gear 9 is meshed with the first bevel gear 7, and a first universal shaft 8 is fixed between the other end of the first transmission rod 3 and the spline sleeve 32;

[0046] From the above connection relationship, it can be known that when a worker manually rotates the toggle ring 5, the toggle ring 5 drives the rotating cylinder 16 to rotate, and the first bevel gear 7 on the rotating cylinder 16 rotates accordingly. The first bevel gear 7 rotates the first transmission rod 3 by meshing with the first secondary bevel gear 9, and the first transmission rod 3 rotates the spline sleeve 32 adjacent to it through the first universal shaft 8.

[0047] Specifically, an inner column 6 is rotatably installed inside the rotating cylinder 16, and two rotating shafts 14 respectively located on both sides of the inner column 6 are rotatably installed at the middle position in the support frame 1, a first gear 13 coaxially arranged therewith is fixed at one end of the inner column 6, a second gear 15 coaxially arranged therewith is fixed at one end of the rotating shaft 14, the first gear 13 is meshed with the second gear 15, a second bevel gear 12 coaxially arranged therewith is fixed on the outer side of the rotating shaft 14, a sixth rotating hole is opened on the outer side of the middle plate 17, and a second transmission rod 4 is rotatably installed in the sixth rotating hole, a second sub-bevel gear 11 coaxially arranged therewith is fixed at one end of the second transmission rod 4, the second sub-bevel gear 11 is meshed with the second bevel gear 12 on the same side thereof, and a second universal shaft 10 is fixed together with the threaded column 21 on the same side thereof at the other end of the second transmission rod 4;

[0048] From the above connection relationship, it can be known that when the worker manually moves the inner column 6, the first gear 13 on the inner column 6 rotates accordingly, and the first gear 13 rotates the rotating shaft 14 through the second gear 15 meshing therewith, and the second bevel gear 12 on the rotating shaft 14 rotates, and the second bevel gear 12 rotates the second transmission rod 4 through the second sub-bevel gear 11 meshing therewith, and the second transmission rod 4 and the second transmission rod 4 and its adjacent threaded column 21 rotate synchronously through the second universal shaft 10.

[0049] Specifically, a third arc block 27 coaxially arranged with the first arc block 25 and having a smaller diameter than the first arc block 25 is fixed to the outside of the first arc block 25, and a fourth arc block 28 coaxially arranged with the second arc block 26 and having a smaller diameter than the second arc block 26 is fixed to the outside of the second arc block 26, and the two third arc blocks 27 and the two fourth arc blocks 28 can form a complete ring;

[0050] It can be seen from the above connection relationship that when the two first arc blocks 25 and the two second arc blocks 26 are deeply inserted into the platform bracket, the two third arc blocks 27 and the two fourth arc blocks 28 can form a circular ring that can fill the positioning hole, so that the support frame 1 will not shake on the platform bracket, further improving the connection strength.

[0051] Specifically, a guide cylinder 37 coaxially arranged with the sliding column 39 is fixed to the outer side of the second movable plate 41, and the spring 38 is sleeved on the outer side of the guide cylinder 37;

[0052] It can be known from the above connection relationship that the setting of the guide cylinder 37 is used to improve the stability of the movement of the sliding column 39.

[0053] Working principle: positioning holes are provided on both sides of the platform bracket, and the worker holds the support frame 1 to align the fixing mechanisms 2 on the four ends of the support frame 1 with the positioning holes; the worker manually rotates the toggle ring 5, and the toggle ring 5 drives the rotating cylinder 16 to rotate, and the first bevel gear 7 on the rotating cylinder 16 rotates accordingly, and the first bevel gear 7 rotates the first transmission rod 3 through the first sub-bevel gear 9 meshing with it, and the first transmission rod 3 rotates the spline sleeve 32 adjacent to it through the first universal shaft 8, and when the spline sleeve 32 rotates, the spline sleeve 32 rotates the threaded rod 30 through the spline shaft 31 plugged therein, and when the threaded rod 30 rotates, the threaded rod 30 drives the connecting frame 33 to move through the threaded transmission form, and the connecting frame 33 drives the first movable plate 36 fixed thereto to move;

[0054] The first moving plate 36 moves, and the first moving plate 36 pushes the second moving plate 41 with the help of the spring 38. At this time, the first moving plate 36 and the second moving plate 41 move synchronously. Figure 7, since the second movable plate 41 is located in front of the first movable plate 36, the second connecting rod 42 on the second movable plate 41 first moves the upper and lower extension rods 29 into the corners of the guide groove 35. When the cylindrical block on the upper or lower extension rod 29 contacts the end point of the guide groove 35, the extension rod 29 cannot move, that is, the first arc block 25 passes through the positioning hole and penetrates into the platform bracket. At this time, the first movable plate 36 continues to move, the spring 38 is compressed, and the sliding column 39 on the first movable plate 36 moves relative to the second movable plate 41. At this time, the first body connecting rod on the second movable plate 41 first moves the left and right extension rods 29 into the corners of the guide groove 35 until the two first arc blocks 25 and the two second arc blocks 26 can form a complete ring, the diameter of which is larger than the diameter of the positioning hole;

[0055] The worker manually turns the inner column 6, and the first gear 13 on the inner column 6 rotates accordingly. The first gear 13 rotates the rotating shaft 14 through the second gear 15 meshing therewith, and the second bevel gear 12 on the rotating shaft 14 rotates. The second bevel gear 12 rotates the second transmission rod 4 through the second sub-bevel gear 11 meshing therewith, and the second transmission rod 4 and the second transmission rod 4 and its adjacent threaded column 21 rotate synchronously through the second universal shaft 10. When the threaded column 21 rotates, the threaded column 21 moves the cylinder 23 through the form of threaded transmission, and pulls the entire cylinder 23 back into the square shell 18 until the two first arc blocks 25 and the two second arc blocks 26 are in contact with the inner wall of the platform bracket. At the same time, the two third arc blocks 27 and the two fourth arc blocks 28 can form a circular ring that can fill the positioning hole, so that the support frame 1 will not shake on the platform bracket.

[0056] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An assembly structure of a work safety protection platform, comprising a support frame (1), characterized in that: The support frame (1) is in an X-shape as a whole, and fixing mechanisms (2) are provided at the four ends of the support frame (1); The fixing mechanism (2) comprises a square shell cylinder (18), one end of each of the four square shell cylinders (18) is fixed to one end of the support frame (1), a circular hole is provided at the other end of the square shell cylinder (18), and a cylinder (23) is arranged in the circular hole. A moving mechanism for moving the cylinder (23) is arranged inside the square shell cylinder (18), two guide plates (24) are fixed on the upper and lower sides and the left and right sides of the cylinder (23), an extension rod (29) is arranged between the two guide plates (24) on each side, a first arc block (25) is fixed at one end of the extension rods (29) on the upper and lower sides, and a second arc block (26) is fixed at one end of the extension rods (29) on the left and right sides, the two first arc blocks (25) and the two second arc blocks (26) can form a complete circular ring, the outer side of the guide plate (24) is provided with a guide groove (35) with an L-shaped track, and A cylindrical block is slidably arranged in the guide groove (35), one end of the cylindrical block is fixedly mounted on the extension rod (29), a first movable plate (36) and a second movable plate (41) are arranged in the cylinder (23), two ends of the first movable plate (36) are respectively rotatably mounted with a first connecting rod (34) together with the extension rods (29) on the left and right sides, two ends of the first movable plate (36) are respectively rotatably mounted with a second connecting rod (42) together with the extension rods (29) on the upper and lower sides, a sliding column (39) is slidably inserted in the middle position of the second movable plate (41), one end of the sliding column (39) is fixed at the middle position of the first movable plate (36), and the other end of the sliding column (39) is fixed with a limiting plate (40), a spring (38) is arranged on the outer side of the sliding column (39), and a pushing mechanism for applying a thrust to the first movable plate (36) is arranged in the cylinder (23).

2. The assembly structure of the work safety protection platform according to claim 1 is characterized in that: The moving mechanism comprises a first fixed block (20), a second fixed block (22), a guide column (19) and a threaded column (21); the first fixed block (20) and the second fixed block (22) are both fixed on the outside of the cylinder (23); two ends of the guide column (19) are respectively fixed on two ends inside the square shell cylinder (18); the first fixed sliding sleeve is arranged on the guide column (19); two ends of the threaded column (21) are respectively rotatably mounted on two ends inside the square shell cylinder (18); a first threaded hole is opened on the outside of the second fixed block (22); and the outside of the threaded column (21) is threadedly mounted in the first threaded hole.

3. The assembly structure of the work safety protection platform according to claim 2 is characterized in that: The pushing mechanism comprises a threaded rod (30) and a connecting frame (33), one end of the connecting frame (33) is fixed to the first movable plate (36), one end of the cylinder (23) is provided with a first rotating hole, one end of the threaded rod (30) is rotatably mounted in the first rotating hole, a second threaded hole is provided on the outer side of the connecting frame (33), and the outer side of the threaded rod (30) is threadably mounted in the second threaded hole.

4. The assembly structure of the work safety protection platform according to claim 3 is characterized in that: A third rotating hole is opened at one end of the square shell cylinder (18), and a spline sleeve (32) is rotatably installed in the third rotating hole. A spline shaft (31) integrally formed with the threaded rod (30) is fixed at one end, and the spline shaft (31) is slidably inserted in the spline sleeve (32).

5. The assembly structure of the work safety protection platform according to claim 4 is characterized in that: The support frame (1) is a hollow structure. A fourth rotating hole is provided in the middle of the support frame (1), and a rotating cylinder (16) is rotatably mounted in the fourth rotating hole. A toggle ring (5) coaxially arranged therewith is fixed to one end of the rotating cylinder (16), and a first bevel gear (7) coaxially arranged therewith is fixed to one end of the rotating cylinder (16). An intermediate plate (17) is fixed to each of the four ends of the support frame (1). A fifth rotating hole is provided on the outer side of the intermediate plate (17), and a first transmission rod (3) is rotatably mounted in the fifth rotating hole. A first secondary bevel gear (9) coaxially arranged therewith is fixed to one end of the first transmission rod (3), and the first secondary bevel gear (9) is meshed with the first bevel gear (7). A first universal joint (8) is fixed between the other end of the first transmission rod (3) and the spline sleeve (32).

6. The assembly structure of the work safety protection platform according to claim 5, characterized in that: An inner column (6) is rotatably mounted inside the rotating cylinder (16), and two rotating shafts (14) respectively located on both sides of the inner column (6) are rotatably mounted at a middle position in the support frame (1); a first gear (13) coaxially arranged therewith is fixed to one end of the inner column (6); a second gear (15) coaxially arranged therewith is fixed to one end of the rotating shaft (14); the first gear (13) meshes with the second gear (15); a second bevel gear (12) coaxially arranged therewith is fixed to the outer side of the rotating shaft (14); a sixth rotating hole is opened on the outer side of the intermediate plate (17); a second transmission rod (4) is rotatably mounted in the sixth rotating hole; a second secondary bevel gear (11) coaxially arranged therewith is fixed to one end of the second transmission rod (4); the second secondary bevel gear (11) meshes with the second bevel gear (12) on the same side thereof; a second universal joint (10) is fixed to the other end of the second transmission rod (4) together with the threaded column (21) on the same side thereof.

7. The assembly structure of the work safety protection platform according to claim 1, characterized in that: A third arc block (27) is fixed on the outer side of the first arc block (25), which is coaxially arranged with the first arc block (25) and has a smaller diameter than the first arc block (25); a fourth arc block (28) is fixed on the outer side of the second arc block (26), which is coaxially arranged with the second arc block (26) and has a smaller diameter than the second arc block (26); and the two third arc blocks (27) and the two fourth arc blocks (28) can form a complete circular ring.

8. The assembly structure of the work safety protection platform according to claim 1, characterized in that: A guide cylinder (37) coaxially arranged with the sliding column (39) is fixed on the outer side of the second movable plate (41), and a spring (38) is sleeved on the outer side of the guide cylinder (37).

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