Protective platform for building construction

Abstract

The invention discloses a protection platform for building construction, and relates to the technical field of operation platforms, the protection platform comprises a bottom shell, an operation table and a shear fork connecting rod; the operating platform is arranged above the bottom shell, and the scissor connecting rod is arranged between the bottom shell and the operating platform; a trolley is fixedly mounted at the bottom of the bottom shell; and two connecting rods at the top of the scissor connecting rod are rotationally sleeved with first sliding blocks. The four grooved wheels with the shafts and the four steel ropes are arranged, the four steel ropes are connected with the four grooved wheels with the shafts in a one-to-one mode, the four steel ropes are distributed at the four corners of the bottom of the operation table, in the ascending process of the operation table, the steel ropes apply pulling force to the four corners of the operation table all the time, and when one side of the operation table is too heavy, the operation table is not damaged. And the tensile force of the steel rope on the other side is increased, so that the bending force applied to the shear fork connecting rod is reduced, the connecting part of the shear fork connecting rod is not easy to damage, and the safety of a working environment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of operating platforms, in particular to a protective platform used for building construction. Background Art

[0002] During the building trimming process, workers need to use a protective platform that can be raised and lowered to perform high-altitude operations.

[0003] A search revealed a Chinese patent document with publication number CN110104595B, which discloses a highly safe tree-pruning lift. The lift comprises a main body, with movable columns fixedly connected to the four corners of the lower end of the main body, and universal wheels fixedly connected to the other ends of the movable columns. A belt is fixedly connected to the upper end of the main body via two symmetrically mounted protective mechanisms, and a positioning mechanism is fixedly connected to the center of the lower end of the main body. The protective mechanism includes a T-shaped slide, a T-shaped slider, a railing, and a connecting rope. This highly safe tree-pruning lift can address the low safety performance of existing lifts. The presence of fences on the lift not only hinders access for workers but also wastes materials. Furthermore, when the lift is parked on the ground, it is prone to movement due to the lack of an effective positioning mechanism, thereby increasing the safety risk for workers performing cutting operations at high altitudes.

[0004] The above-mentioned elevator is a type of lifting operation platform, which is a scissor lift platform, which can be used for high-altitude operations in a variety of environments. Based on existing technology and search findings: The scissor lift platform is a common high-altitude work platform, but the scissor lift platform becomes slender in the process of upward extension, and the ability of the platform to resist resistance gradually weakens. If the platform is unevenly stressed, that is, the non-center side of the platform is subjected to too much force, the scissor frame connection is likely to be damaged. If damage occurs, the lifting platform will tilt, which will endanger the personal safety of the operators. Summary of the Invention

[0005] The purpose of the present invention is to provide a protective platform for building construction to solve the problems raised in the above background technology.

[0006] The technical solution of the present invention is: a protective platform for building construction, comprising a bottom shell, an operating platform and a scissor-type connecting rod;

[0007] The operating platform is arranged above the bottom shell, and the scissor connecting rod is located between the bottom shell and the operating platform;

[0008] A trolley is fixedly mounted on the bottom of the bottom shell;

[0009] The two top links of the scissor-type connecting rod are both rotatably sleeved with a first slider, and the bottom of the operating table is provided with a centering mechanism to assist the two first sliders in performing centering movement;

[0010] The two connecting rods at the bottom of the scissor-type connecting rod are rotatably sleeved with a second slider, a double-threaded rod is provided inside the bottom shell, and the outer sides of both ends of the double-threaded rod are rotatably sleeved with a second bearing seat fixed to the bottom shell, and both ends of the double-threaded rod are sleeved with a nut sleeve adapted thereto, and the two nut sleeves are respectively fixed to the two second sliders;

[0011] A driving assembly for rotating the double-threaded rod is provided inside the bottom shell;

[0012] A pair of fourth bearing seats are fixed at the four corners inside the bottom shell, and each pair of fourth bearing seats is rotatably mounted with a sheave with an axis, and a rotating mechanism is provided between the axle of the sheave with an axis and the double-threaded rod to enable the two to rotate synchronously;

[0013] A steel rope is arranged in the groove of the shaft sheave, one end of the steel rope is fixed to the sheave, and the other end of the steel rope is fixed at the middle position of the top of the bottom shell. A pair of support frames are fixed to the four corners of the bottom of the operating table, and a first wire pulley is rotatably installed on each pair of support frames, and each steel rope is sleeved on the first wire pulley adjacent to it.

[0014] Preferably, the centering mechanism includes an intermediate plate and two connecting rods. The middle position of the intermediate plate is rotatably mounted at the middle position of the bottom of the operating table. One end of the two connecting rods is rotatably mounted on the two ends of the two intermediate plates respectively. The other ends of the two connecting rods are rotatably mounted at the middle position of the top of the first slider respectively. The two connecting rods are centrally symmetrical.

[0015] Preferably, first fixing plates are fixed to both ends of the bottom of the operating table, a plurality of first guide rods are fixed to opposite sides of the two first fixing plates, and two first sliding blocks are slidably mounted on each first guide rod.

[0016] Preferably, second fixing plates are fixed to both ends of the top of the bottom shell, a plurality of second guide rods are fixed to opposite sides of the two second fixing plates, and two second sliding blocks are slidably sleeved on each second guide rod.

[0017] Preferably, the drive assembly includes a servo motor, a worm and a worm wheel, both ends of the worm are rotatably sleeved with a first bearing seat fixed to the bottom shell, the worm wheel is coaxially fixed to the double-threaded rod, and the worm wheel is meshed with the worm, the servo motor is fixed to the bottom shell, and the output shaft of the servo motor is coaxially fixed to the worm.

[0018] Preferably, the rotating mechanism includes a transmission rod, and the outer sides of both ends of the transmission rod are rotatably sleeved with a third bearing seat fixed to the bottom shell, and a transmission structure is provided between the transmission rod and the double-threaded rod to enable the two to rotate synchronously, and the two ends of the transmission rod are respectively fixed with a universal joint together with two adjacent shaft groove wheels.

[0019] Preferably, the transmission structure includes a main bevel gear and a secondary bevel gear, the main bevel gear is coaxially fixed to the double-threaded rod, the secondary bevel gear is coaxially fixed to the transmission rod, and the main bevel gear and the secondary bevel gear are meshed.

[0020] Preferably, the middle part of the middle rod of the scissors-type linkage is flat, and the middle rod of the scissors-type linkage is provided with four through-holes, and the four steel ropes pass through the through-holes respectively. The top middle rod of the scissors-type linkage is fixed with four recessed blocks, and a second wire pulley is rotatably installed in the recessed blocks, and the four steel ropes are respectively sleeved on the four second wire pulleys.

[0021] Preferably, support rods coaxially arranged therewith are fixed at both ends of the two top links of the scissors-type link, side support plates are fixed on both sides of the bottom of the operating table, guide grooves are provided on the outer sides of both ends of the two side support plates, and one end of the four support rods is slidably arranged in the four guide grooves respectively.

[0022] Preferably, a guardrail is fixed to the tabletop of the operating table, one side of the guardrail is not closed, a console is fixed to the horizontal bar of the guardrail, a control panel is fixed to the outer shell of the console, and a controller is fixedly installed inside the console.

[0023] The present invention provides a protective platform for building construction through improvement, which has the following improvements and advantages compared with the prior art:

[0024] First, the present invention is provided with four sheaves with shafts and four steel ropes. The four steel ropes are connected to the four sheaves with shafts one-to-one, and the four steel ropes are distributed at the four corners of the bottom of the operating table. When the operating table is raised, the steel ropes constantly apply tension to the four corners of the operating table. When one side of the operating table is too heavy, the tension of the steel ropes on the other side increases accordingly, which reduces the bending force on the scissor-type connecting rod, thereby making the connection of the scissor-type connecting rod less likely to be damaged, thereby improving the safety of the working environment;

[0025] Secondly, the steel rope of the present invention is guided by the first guide wheel and the second guide wheel, so that the steel rope passes through the middle rod of the scissor-type connecting rod and is fixed on the bottom shell. Since the steel rope is in a taut state, the scissor-type connecting rod as a whole tends to be straightened, thereby further improving the ability of the scissor-type connecting rod to resist bending.

[0026] Thirdly, the steel rope of the present invention has multiple contact points, and the steel rope can disperse the force it receives more easily, so that the steel rope is less likely to break, thereby increasing the service life of the steel rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a schematic diagram of the overall first-view structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second viewing angle;

[0030] Figure 3 This is a schematic diagram of the overall structure of the present invention from a third perspective;

[0031] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at point A;

[0032] Figure 5 This is a schematic diagram of the three-dimensional structure of the operating table of the present invention;

[0033] Figure 6 Schematic diagram of the internal structure of the bottom shell of the present invention;

[0034] Figure 7 for Figure 6 A schematic diagram of the enlarged structure at point B;

[0035] Figure 8 for Figure 6 Enlarged structural diagram at C.

[0036] Reference numerals:

[0037] 1. Bottom shell; 2. Trolley; 3. Scissor connecting rod; 4. Steel rope; 5. First guide pulley; 6. Operating table; 7. Guardrail; 8. Control console; 9. Support frame; 10. Intermediate rod; 11. Concave block; 12. Second guide pulley; 13. Side support plate; 14. Support rod; 15. Intermediate plate; 16. Connecting rod; 17. First fixed plate; 18. First slider; 19. First guide rod; 20. Guide groove; 21. Servo motor; 22. Second guide rod; 23. Second slider; 24. Nut sleeve; 25. Double threaded rod; 26. Worm; 27. Worm gear; 28. First bearing seat; 29. ​​Second bearing seat; 30. Second fixed plate; 31. Transmission rod; 32. Third bearing seat; 33. Main bevel gear; 34. Secondary bevel gear; 35. Universal joint; 36. Fourth bearing seat; 37. Grooved pulley with shaft. DETAILED DESCRIPTION

[0038] The present invention is described in detail below, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] The present invention provides a protective platform for building construction through improvement. The technical solution of the present invention is:

[0040] like Figures 1 to 8 As shown, an embodiment of the present invention provides a protective platform for building construction, comprising a bottom shell 1, an operating platform 6 and a scissor-type connecting rod 3;

[0041] The operating platform 6 is arranged above the bottom shell 1, and the scissor connecting rod 3 is located between the bottom shell 1 and the operating platform;

[0042] A trolley 2 is fixedly mounted on the bottom of the bottom shell 1. The trolley 2 is an AVG trolley 2, which is a prior art. Its specific structure and working principle will not be elaborated in detail here.

[0043] The top two links of the scissor-type connecting rod 3 are both rotatably sleeved with a first slider 18, and the bottom of the operating table 6 is provided with a centering mechanism to assist the two first sliders 18 in performing centering movement;

[0044] The two bottom links of the scissor-type connecting rod 3 are rotatably sleeved with a second slider 23. A double-threaded rod 25 is provided inside the bottom shell 1. The outer sides of both ends of the double-threaded rod 25 are rotatably sleeved with a second bearing seat 29 fixed to the bottom shell 1. Both ends of the double-threaded rod 25 are sleeved with a nut sleeve 24 adapted thereto. The two nut sleeves 24 are respectively fixed to the two second sliders 23.

[0045] The bottom shell 1 is provided with a driving assembly for rotating the double-threaded rod 25;

[0046] A pair of fourth bearing seats 36 are fixed at the four corners of the bottom shell 1, and each pair of fourth bearing seats 36 is rotatably mounted with a sheave 37 with an axis. A rotating mechanism is provided between the axle of the sheave 37 and the double-threaded rod 25 to enable the two to rotate synchronously.

[0047] A steel rope 4 is arranged in the groove of the shaft sheave 37. One end of the steel rope 4 is fixed to the sheave, and the other end of the steel rope 4 is fixed to the middle position of the top of the bottom shell 1. A pair of support frames 9 are fixed to the four corners of the bottom of the operating table 6. A first guide wheel 5 is rotatably mounted on each pair of support frames 9, and each steel rope 4 is sleeved on the adjacent first guide wheel 5.

[0048] The above connection relationship shows the solution of the present invention: when the double-threaded rod 25 rotates, the nut sleeves 24 at both ends of the double-threaded rod 25 move synchronously and in opposite directions along the double-threaded rod 25 through threaded transmission. When the two nut sleeves 24 move relatively close to each other, the two nut sleeves 24 respectively drive the first slider 18 to move relatively close to each other. The two first sliders 18 make the bottom two connecting rods of the scissors-type connecting rod 3 approach each other, and the scissors-type connecting rod 3 extends to lift the operating table 6. Since a rotating mechanism that enables the synchronous rotation of the two is provided between the axle of the shaft groove wheel 37 and the double-threaded rod 25, the shaft groove wheel 37 is used to pay out the line.

[0049] Specifically, in conjunction with Figure 5 As shown, the centering mechanism includes an intermediate plate 15 and two connecting rods 16. The middle position of the intermediate plate 15 is rotatably mounted at the middle position of the bottom of the operating table 6. One end of the two connecting rods 16 is rotatably mounted on the two ends of the two intermediate plates 15, and the other ends of the two connecting rods 16 are rotatably mounted at the top middle position of the first slider 18. The two connecting rods 16 are centrally symmetrical. When the scissors-type link 3 is extended, the top two links of the scissors-type link 3 approach each other, and the first sliders 18 on the two links approach each other. The first slider 18 rotates the intermediate plate 15 through the connecting rod 16, so that the two first sliders 18 can stably complete the centering movement, while ensuring that the two first sliders 18 can be stable in the middle area of ​​the operating table 6.

[0050] Specifically, in conjunction with Figure 5 As shown, first fixing plates 17 are fixed at both ends of the bottom of the operating table 6, and multiple first guide rods 19 are fixed on the opposite sides of the two first fixing plates 17. Two first sliders 18 are slidably mounted on each first guide rod 19; the first guide rods 19 are arranged to enable the first slider 18 to only move linearly relative to the operating table 6.

[0051] Specifically, in conjunction with Figure 6 As shown, second fixing plates 30 are fixed at both ends of the top of the bottom shell 1, and multiple second guide rods 22 are fixed on the opposite sides of the two second fixing plates 30. Two second sliders 23 are slidably mounted on each second guide rod 22; the second guide rods 22 are arranged to enable the second slider 23 to only move linearly relative to the bottom shell 1.

[0052] Specifically, in conjunction with Figure 6 , Attachment Figure 7 and attached Figure 8 As shown, the drive assembly includes a servo motor 21, a worm 26 and a worm wheel 27. Both ends of the worm 26 are rotatably sleeved with a first bearing seat 28 fixed to the bottom shell 1. The worm wheel 27 is coaxially fixed to the double-threaded rod 25, and the worm wheel 27 is engaged with the worm 26. The servo motor 21 is fixed to the bottom shell 1, and the output shaft of the servo motor 21 is coaxially fixed to the worm 26. The servo motor 21 rotates the worm 26 through the output shaft, and the worm 26 rotates the double-threaded rod 25 through the worm wheel 27 engaged therewith.

[0053] Specifically, in conjunction with Figure 6 and attached Figure 8 As shown, the rotating mechanism includes a transmission rod 31, and the outer sides of both ends of the transmission rod 31 are rotatably sleeved with a third bearing seat 32 fixed to the bottom shell 1, and a transmission structure is provided between the transmission rod 31 and the double-threaded rod 25 to enable the two to rotate synchronously. The two ends of the transmission rod 31 are respectively fixed with a universal shaft 35 together with two adjacent shaft sheaves 37, and the transmission structure includes a main bevel gear 33 and a secondary bevel gear 34. The main bevel gear 33 is coaxially fixed with the double-threaded rod 25, and the secondary bevel gear 34 is coaxially fixed with the transmission rod 31, and the main bevel gear 33 is meshed with the secondary bevel gear 34; when the double-threaded rod 25 rotates, the main bevel gear 33 coaxially fixed with the double-threaded rod 25 rotates synchronously, and the main bevel gear 33 drives the transmission rod 31 to rotate through the secondary bevel gear 34 meshed with it, and the transmission rod 31 drives the shaft sheave 37 to rotate through the universal shaft 35.

[0054] Specifically, in conjunction with Figure 3 and attached Figure 4 As shown, the middle part of the middle rod 10 of the scissors-type link 3 is flat, and the middle rod 10 of the scissors-type link 3 is provided with four through-holes, and the four steel ropes 4 pass through the through-holes respectively. The top middle rod 10 of the scissors-type link 3 is fixed with four recessed blocks 11, and a second wire pulley 12 is rotatably installed in the recessed blocks 11. The four steel ropes 4 are respectively sleeved on the four second wire pulleys 12, and the second wire pulley 12 is used to guide the direction of the steel rope 4. Even if the steel rope 4 passes through the through-hole in a vertical shape, since the steel rope 4 is in a taut state, the scissors-type link 3 as a whole tends to be straightened, thereby further improving the ability of the scissors-type link 3 to resist bending.

[0055] Specifically, in conjunction with Figure 3 and attached Figure 5 As shown, both ends of the top two links of the scissors-type link 3 are fixed with support rods 14 arranged coaxially therewith, and side support plates 13 are fixed on both sides of the bottom of the operating table 6. Guide grooves 20 are provided on the outer sides of both ends of the two side support plates 13. One ends of the four support rods 14 are respectively slidably set in the four guide grooves 20. The support rods 14 cooperate with the guide grooves 20 to improve the stability of the first slider 18 during movement. At the same time, the support rods 14 provide upward supporting force through the side support plates 13.

[0056] Specifically, in conjunction with Figure 1 -Attached Figure 3 As shown, the table top of the operating table 6 is fixed with a guardrail 7. The guardrail 7 is set to provide a support point for the workers. One side of the guardrail 7 is not closed. The horizontal bar of the guardrail 7 is fixed with a console 8. The outer shell of the console 8 is fixed with a control panel. The interior of the console 8 is fixed with a controller. The controller is a prior art and its specific structure and working principle are not elaborated in detail here. It is supplemented here that the controller establishes an electrical connection with the various electrical components mentioned above.

[0057] To supplement the above, after the entire operating platform is installed, the steel rope 4 is pre-tightened to keep the steel rope 4 in a tense state.

[0058] Working principle:

[0059] The worker stands on the operating platform 6 and then operates the control console 8;

[0060] The entire operating platform is moved by trolley 2;

[0061] After moving to the designated position, the control console 8 starts the servo motor 21, which rotates the worm 26 through the output shaft, and the worm 26 rotates the double-threaded rod 25 through the worm gear 27 meshing with it;

[0062] When the double-threaded rod 25 rotates, the nut sleeves 24 on both ends of the double-threaded rod 25 move synchronously and in opposite directions along the double-threaded rod 25 through thread transmission. When the two nut sleeves 24 move relatively close to each other, the two nut sleeves 24 respectively drive the first sliders 18 to move relatively close to each other. The two first sliders 18 make the bottom two connecting rods of the scissor-type connecting rod 3 approach each other, and the scissor-type connecting rod 3 extends, lifting the operating table 6.

[0063] When the double-threaded rod 25 rotates, the main bevel gear 33 coaxially fixed with the double-threaded rod 25 rotates synchronously, and the main bevel gear 33 drives the transmission rod 31 to rotate through the secondary bevel gear 34 meshing with it, and the transmission rod 31 drives the shaft groove wheel 37 to rotate through the universal joint 35, and the shaft groove wheel 37 pays out the line; in the process of the operating platform 6 rising, the steel rope 4 always applies tension to the four corners of the operating platform 6. When one side of the operating platform 6 is too heavy, the tension of the steel rope 4 on the other side increases accordingly, which reduces the bending force on the scissors-type link 3, thereby making the connection of the scissors-type link 3 less likely to be damaged, thereby improving the safety of the working environment; because the steel rope 4 is guided through the middle rod 10 of the scissors-type link 3 and fixed on the bottom shell 1, and the steel rope 4 is in a taut state, the scissors-type link 3 as a whole tends to be straightened, thereby further improving the ability of the scissors-type link 3 to resist bending.

[0064] The above description is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one 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 is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A protective platform for building construction, comprising a bottom shell (1), an operating platform (6) and a scissor-type connecting rod (3), characterized in that: The operating platform (6) is arranged above the bottom shell (1), and the scissor-type connecting rod (3) is located between the bottom shell (1) and the operating platform; A trolley (2) is fixedly mounted on the bottom of the bottom shell (1); The top two connecting rods of the scissor-type connecting rod (3) are both rotatably sleeved with a first slider (18), and the bottom of the operating table (6) is provided with a centering mechanism for assisting the two first sliders (18) to perform centering movement; The two bottom connecting rods of the scissor-type connecting rod (3) are both rotatably sleeved with a second slider (23), a double-threaded rod (25) is provided inside the bottom shell (1), and the outer sides of both ends of the double-threaded rod (25) are both rotatably sleeved with a second bearing seat (29) fixed to the bottom shell (1), and both ends of the double-threaded rod (25) are both sleeved with a nut sleeve (24) adapted thereto, and the two nut sleeves (24) are respectively fixed to the two second sliders (23); A driving assembly for rotating the double-threaded rod (25) is provided inside the bottom shell (1); A pair of fourth bearing seats (36) are fixed at the four inner corners of the bottom shell (1), and each pair of fourth bearing seats (36) is rotatably mounted with a sheave with an axis (37), and a rotating mechanism is provided between the axle of the sheave with an axis (37) and the double-threaded rod (25) to enable the two to rotate synchronously; A steel rope (4) is provided in the groove of the shaft groove wheel (37), one end of the steel rope (4) is fixed to the groove wheel, and the other end of the steel rope (4) is fixed to the middle position of the top of the bottom shell (1). A pair of support frames (9) are fixed to the four corners of the bottom of the operating table (6), and a first wire wheel (5) is rotatably mounted on each pair of the support frames (9), and each steel rope (4) is sleeved on the first wire wheel (5) adjacent to it.

2. A protective platform for building construction according to claim 1, characterized in that: The centering mechanism comprises an intermediate plate (15) and two connecting rods (16). The intermediate position of the intermediate plate (15) is rotatably mounted at the intermediate position of the bottom of the operating table (6). One end of the two connecting rods (16) is rotatably mounted on the two ends of the two intermediate plates (15). The other ends of the two connecting rods (16) are rotatably mounted at the intermediate position of the top of the first slider (18). The two connecting rods (16) are centrally symmetrical.

3. The protective platform for building construction according to claim 1, characterized in that: A first fixing plate (17) is fixed at both ends of the bottom of the operating table (6), and a plurality of first guide rods (19) are fixed on opposite sides of the two first fixing plates (17), and two first sliders (18) are slidably mounted on each first guide rod (19).

4. The protective platform for building construction according to claim 1, characterized in that: Second fixing plates (30) are fixed to both ends of the top of the bottom shell (1), and a plurality of second guide rods (22) are fixed to opposite sides of the two second fixing plates (30), and two second sliders (23) are slidably sleeved on each second guide rod (22).

5. The protective platform for building construction according to claim 1, characterized in that: The driving assembly comprises a servo motor (21), a worm (26) and a worm wheel (27); both ends of the worm (26) are rotatably sleeved with a first bearing seat (28) fixed to the bottom shell (1); the worm wheel (27) is coaxially fixed to the double-threaded rod (25), and the worm wheel (27) is meshed with the worm (26); the servo motor (21) is fixed to the bottom shell (1), and the output shaft of the servo motor (21) is coaxially fixed to the worm (26).

6. The protective platform for building construction according to claim 1, characterized in that: The rotating mechanism comprises a transmission rod (31), and the outer sides of both ends of the transmission rod (31) are rotatably sleeved with a third bearing seat (32) fixed to the bottom shell (1). A transmission structure is provided between the transmission rod (31) and the double-threaded rod (25) to enable the two to rotate synchronously. The two ends of the transmission rod (31) are respectively fixed with a universal shaft (35) together with two adjacent shaft groove wheels (37).

7. A protective platform for building construction according to claim 6, characterized in that: The transmission structure comprises a main bevel gear (33) and a secondary bevel gear (34), wherein the main bevel gear (33) is coaxially fixed to the double-threaded rod (25), and the secondary bevel gear (34) is coaxially fixed to the transmission rod (31), and the main bevel gear (33) and the secondary bevel gear (34) are meshed.

8. The protective platform for building construction according to claim 7, characterized in that: The middle part of the middle rod (10) of the scissor-type connecting rod (3) is flat, and the middle rod (10) of the scissor-type connecting rod (3) is provided with four through-holes, and the four steel ropes (4) respectively pass through the through-holes. The top middle rod (10) of the scissor-type connecting rod (3) is fixed with four recessed blocks (11), and a second wire pulley (12) is rotatably installed in the recessed blocks (11), and the four steel ropes (4) are respectively sleeved on the four second wire pulleys (12).

9. The protective platform for building construction according to claim 1, characterized in that: Both ends of the two top connecting rods of the scissor-type connecting rod (3) are fixed with support rods (14) arranged coaxially therewith, and both sides of the bottom of the operating table (6) are fixed with side support plates (13), and the outer sides of both ends of the two side support plates (13) are provided with guide grooves (20), and one end of the four support rods (14) is respectively slidably arranged in the four guide grooves (20).

10. The protective platform for building construction according to claim 1, characterized in that: The tabletop of the operating table (6) is fixed with a guardrail (7), one side of the guardrail (7) is not closed, a console (8) is fixed to the horizontal bar of the guardrail (7), a control panel is fixed to the outer shell of the console (8), and a controller is fixedly installed inside the console (8).

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