Safe hoisting device for building construction

Abstract

The invention relates to the technical field of building construction, and particularly discloses a safe hoisting device for building construction, which comprises a mounting plate, sleeving boxes are fixedly connected to two sides of the top of the mounting plate, a connecting sleeve box is fixedly connected to one sides of the surfaces of the two sleeving boxes, and a protective box is fixedly connected to the middle of the surface of the connecting sleeve box; through arrangement of a transmission wheel, a transmission belt, a driving wheel, a winding rod, a steel cable, a supporting plate and a warning lamp, during use, the winding rod drives the steel cable wound and connected on the surface to rotate in the same direction, the steel cable on one side is shrunk, the steel cable on the other side is released, and then the supporting plate at the bottom end of the steel cable can be controlled to adjust the inclination; the weights of the two sides of the supporting plate are controlled through the weight sensor, when the weight of one side is overloaded, the warning lamp above the supporting plate is turned on, and therefore the steel cable is adjusted, the angle of the supporting plate is controlled, the weight of an object hoisted at the bottom is kept balanced, and the effect of adjusting the balance of the hoisted object is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a safety hoisting device for building construction. Background Art

[0002] With the rapid development of the construction industry, prefabricated buildings have gradually become the mainstream trend due to their high efficiency and environmental protection. However, prefabricated buildings have put forward higher requirements on the lifting accuracy and safety of components. Traditional lifting methods have problems such as low degree of automation, poor positioning accuracy, low construction efficiency and great safety hazards. It is difficult to meet the needs of modern construction. Therefore, the development of a safe, efficient and precise lifting device has become an industry consensus.

[0003] In the Chinese patent with publication number CN117466165A, a safe hoisting device for construction is mentioned, including an overweight warning hoisting body, a fitting and fastening device, and a ring-shaped binding and tightening device. The present invention belongs to the technical field of safe hoisting for construction, and specifically is a safe hoisting device for construction. According to the situation that steel bars are prone to slipping during hoisting, a combination of two-end alignment, fitting and fastening and automatic ring-shaped anti-skid tightening is adopted to achieve the technical effect of all-round and stable tightening of steel bars, and effectively prevent the steel bars from slipping during the hoisting process; in order to prevent the hoisting equipment from breaking in the air when overweight, resulting in injuries to workers, the weight of the steel bars to be hoisted is measured in advance, and the technical effect of safe hoisting of steel bars is achieved.

[0004] However, the above technical solution adopts a combination of two-end alignment and fastening and automatic annular anti-skid tightening to achieve all-round and stable tightening of the steel bars. Although the above device can fix the steel bars, the weight of the steel bars is large. When it fails to achieve balance, if the two ends tilt sideways, it is easy to cause the steel bars to break or increase the elastic force, making it prone to danger, so the staff needs to improve it. Summary of the invention

[0005] The object of the present invention is to provide a safe hoisting device for construction to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A safety hoisting device for construction, comprising:

[0008] Mounting plate;

[0009] Both sides of the top of the mounting plate are fixedly connected with socket boxes, one side of the surfaces of the two socket boxes is fixedly connected with a connection box, and the middle part of the surface of the connection box is fixedly connected with a protective box;

[0010] A first servo motor is fixedly connected to one side of the inner wall of the protective box, a driving rod is installed at the output end of the first servo motor, two transmission wheels are fixedly connected to the front end of the driving rod, one side of the surface of the two transmission wheels is rotatably connected to a transmission belt, one side of the inner wall of the two transmission belts is rotatably connected to a driving wheel, one side of the back of the two driving wheels is fixedly connected to a winding rod, and both ends of the winding rod are rotatably connected to the inner wall of the socket box, one side of the surface of the winding rod is wound with a steel cable, and the bottom end of the steel cable is fixedly connected to a support plate.

[0011] Preferably, weight sensors are fixedly connected to both sides of the inner wall of the support plate, warning lights are fixedly connected to both sides of the top of the support plate, and the warning lights and the weight sensors are electrically connected to each other.

[0012] Preferably, a connecting rod is fixedly connected to the middle part of the bottom of the mounting plate, a connecting block is fixedly connected to the bottom end of the connecting rod, a fixed splint is rotatably connected to the middle parts of both sides of the connecting block, and one side of the bottom of the fixed splint is fixedly connected to the top of the support plate.

[0013] Preferably, a second servo motor is fixedly connected to both sides of the inner wall of the support plate, a transmission rod is installed at the output end of the second servo motor, a threaded rod is fixedly connected to the front end of the transmission rod, and a threaded ring is threadedly connected to one side of the surface of the threaded rod.

[0014] Preferably, one side of the bottom of the threaded collar is fixedly connected to an assembly frame, and one side of the top of the assembly frame is overlapped with the bottom of the support plate, both sides of the inner wall of the assembly frame are fixedly connected to electric telescopic rods, and the bottom end of the electric telescopic rod is fixedly connected to a mounting plate.

[0015] Preferably, a third servo motor is fixedly connected to one side of the inner wall of the mounting plate, a movable rod is installed at the output end of the third servo motor, and a driving gear is fixedly connected to the front end of the movable rod.

[0016] Preferably, both sides of the driving gear surface are meshedly connected with transmission gears, and the middle parts of the back sides of the two transmission gears are fixedly connected with connecting rods.

[0017] Preferably, one end of the connecting rod is fixedly connected to a rotating plate, and one side of the bottom of the rotating plate is fixedly connected to an arc-shaped strap.

[0018] Preferably, a plurality of sets of fixing chains are fixedly connected to one side of the bottom of the support plate, and a buckle is fixedly connected to one side of the bottom of the fixing chain.

[0019] Preferably, a reinforcement rod is fixedly connected to the middle of the top of the mounting plate, and a mounting ring is fixedly connected to the top of the reinforcement rod.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) Through the arrangement of the transmission wheel, transmission belt, driving wheel, winding rod, steel cable, support plate and warning light, when in use, the output end of the first servo motor drives the driving rod to rotate, and the driving rod drives the two transmission wheels at the front end to rotate, and the two transmission wheels both drive the transmission belt to rotate, and the two transmission belts both drive the driving wheels connected to the inner wall to rotate, and the two driving wheels respectively drive the winding rod to rotate, so that the winding rod drives the steel cable connected to the surface to rotate in the same direction, so that the steel cable on one side contracts and the steel cable on the other side is released, and then the support plate at the bottom of the steel cable can be controlled to adjust the inclination, and the weight of both sides of the support plate is controlled by the weight sensor. When the weight on one side is overloaded, the warning light above the support plate lights up, thereby adjusting the steel cable and controlling the angle of the support plate, so that the weight of the objects hoisted at the bottom is kept balanced, thereby achieving the effect of adjusting the balance of the hoisted objects and facilitating the operation of the staff.

[0022] (2) Through the arrangement of the connecting rod, the connecting block, the fixed splint and the support plate, when in use, the bottom end of the connecting rod is rotatably connected to the inner wall of the fixed splint through the connecting block, so that when the support plate is tilted, the connecting rod still maintains a stable pulling force on the support plate, thereby achieving the effect of stabilizing the support plate without affecting its tilt adjustment.

[0023] (3) Through the arrangement of the threaded rod, threaded ring, assembly frame, electric telescopic rod, erection plate, driving gear, transmission gear, rotating plate and arc-shaped strap, when in use, the output end of the second servo motor drives the transmission rod to rotate, the transmission rod drives the threaded rod at one end to rotate, the threaded rod drives the threaded ring connected to the surface to move, the threaded ring drives the assembly frame at the bottom to move, the electric telescopic rod drives the erection plate at the bottom to adjust the height, the output end of the third servo motor drives the movable rod to rotate, the movable rod drives the driving gear at the front end to rotate, the driving gear drives the transmission gears on both sides of the surface to rotate, the two transmission gears drive the connecting rod on the back to rotate relative to each other, the connecting rod drives the rotating plate at one end to rotate, so that the rotating plate drives the arc-shaped strap at the bottom to rotate, and after the fixed chain wraps the object, it is fixed by the buckle, and the arc-shaped strap is clamped and limited on both sides of the object, thereby achieving the effect of conveniently fixing the hoisted objects and facilitating the operation of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A perspective view of the present invention;

[0025] Figure 2 is a three-dimensional diagram of the warning light of the present invention;

[0026] Figure 3 is a three-dimensional diagram of the steel cable of the present invention;

[0027] Figure 4is a three-dimensional diagram of a second servo motor of the present invention;

[0028] Figure 5 It is a three-dimensional diagram of the electric telescopic rod of the present invention;

[0029] Figure 6 is a three-dimensional diagram of a third servo motor of the present invention;

[0030] In the figure: 1. mounting plate; 2. socket box; 3. connecting box; 4. protection box; 5. first servo motor; 6. driving rod; 7. transmission wheel; 8. transmission belt; 9. driving wheel; 10. winding rod; 11. steel cable; 12. support plate; 13. warning light; 14. connecting rod; 15. connecting block; 16. fixing splint; 17. second servo motor; 18. transmission rod; 19. threaded rod; 20. threaded collar; 21. assembly frame; 22. electric telescopic rod; 23. erection plate; 24. third servo motor; 25. movable rod; 26. driving gear; 27. transmission gear; 28. connecting rod; 29. ​​rotating plate; 30. arc-shaped lap plate; 31. fixing chain; 32. buckle; 33. reinforcement rod; 34. mounting ring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0032] Embodiment 1:

[0033] See also Figures 1 to 6 As shown, a safety hoisting device for construction, comprising:

[0034] Mounting plate 1;

[0035] Both sides of the top of the mounting plate 1 are fixedly connected with socket boxes 2, one side of the surface of the two socket boxes 2 is fixedly connected with a connection box 3, and the middle part of the surface of the connection box 3 is fixedly connected with a protection box 4;

[0036] A first servo motor 5 is fixedly connected to one side of the inner wall of the protective box 4, and a driving rod 6 is installed at the output end of the first servo motor 5. Two transmission wheels 7 are fixedly connected to the front end of the driving rod 6. One side of the surface of the two transmission wheels 7 is rotatably connected to a transmission belt 8, and one side of the inner wall of the two transmission belts 8 is rotatably connected to a driving wheel 9. One side of the back of the two driving wheels 9 is fixedly connected to a winding rod 10, and both ends of the winding rod 10 are rotatably connected to the inner wall of the socket box 2, one side of the surface of the winding rod 10 is wound with a steel cable 11, and the bottom end of the steel cable 11 is fixedly connected to a support plate 12, and both sides of the inner wall of the support plate 12 are fixedly connected to weight sensors, and both sides of the top of the support plate 12 are fixedly connected to warning lights 13, and the warning light 13 and the weight sensor are electrically connected to each other.

[0037] When in use, socket boxes 2 are arranged on both sides of the top of the mounting plate 1, and connecting boxes 3 are arranged on the surfaces of the two socket boxes 2. The surface of the connecting box 3 is provided with a first servo motor 5 through a protective box 4. The staff connects the first servo motor 5 to the power supply, and the output end of the first servo motor 5 drives the driving rod 6 to rotate, and the driving rod 6 drives the two transmission wheels 7 at the front end to rotate, and the two transmission wheels 7 both drive the transmission belt 8 to rotate, and the two transmission belts 8 both drive the driving wheel 9 connected to the inner wall to rotate, and the two driving wheels 9 respectively drive the winding rod 10 to rotate, so that the winding rod 10 drives the steel cable 11 connected to the surface to rotate in the same direction, so that the steel cable 11 on one side is contracted and the steel cable 11 on the other side is released, and then the support plate 12 at the bottom end of the steel cable 11 can be controlled to adjust the inclination, and weight sensors are arranged on both sides of the inner wall of the support plate 12, and the weight of the two sides of the support plate 12 is controlled by the weight sensor. When the weight on one side is overloaded, the warning light 13 above the support plate 12 lights up, thereby adjusting the steel cable 11 and controlling the angle of the support plate 12, thereby keeping the weight of the objects hoisted at the bottom balanced.

[0038] Embodiment 2:

[0039] See also Figures 1 to 6 As shown, a connecting rod 14 is fixedly connected to the middle of the bottom of the mounting plate 1, a connecting block 15 is fixedly connected to the bottom end of the connecting rod 14, a fixing splint 16 is rotatably connected to the middle of both sides of the connecting block 15, and one side of the bottom of the fixing splint 16 is fixedly connected to the top of the support plate 12.

[0040] When in use, a connecting rod 14 is provided at the bottom of the mounting plate 1, and a fixing splint 16 is provided at the top of the supporting plate 12, so that the bottom end of the connecting rod 14 is rotatably connected to the inner wall of the fixing splint 16 through the connecting block 15, so that when the supporting plate 12 is tilted, the connecting rod 14 still maintains a stable pulling force on the supporting plate 12.

[0041] Embodiment three:

[0042] See also Figures 1 to 6As shown, both sides of the inner wall of the support plate 12 are fixedly connected with a second servo motor 17, and the output end of the second servo motor 17 is installed with a transmission rod 18, and the front end of the transmission rod 18 is fixedly connected with a threaded rod 19, and one side of the surface of the threaded rod 19 is threadedly connected with a threaded collar 20, and one side of the bottom of the threaded collar 20 is fixedly connected with an assembly frame 21, and one side of the top of the assembly frame 21 is overlapped with the bottom of the support plate 12, and both sides of the inner wall of the assembly frame 21 are fixedly connected with an electric telescopic rod 22, and the bottom end of the electric telescopic rod 22 is fixedly connected with a mounting plate 23, and one side of the inner wall of the mounting plate 23 is fixedly connected with a third servo motor 24, and the third servo A movable rod 25 is installed at the output end of the motor 24, and a driving gear 26 is fixedly connected to the front end of the movable rod 25. Transmission gears 27 are meshed and connected on both sides of the surface of the driving gear 26. A connecting rod 28 is fixedly connected to the middle of the back of the two transmission gears 27. A rotating plate 29 is fixedly connected to one end of the connecting rod 28. An arc-shaped strap 30 is fixedly connected to one side of the bottom of the rotating plate 29. Multiple sets of fixed chains 31 are fixedly connected to one side of the bottom of the support plate 12. A buckle 32 is fixedly connected to one side of the bottom of the fixed chain 31. A reinforcement rod 33 is fixedly connected to the middle of the top of the mounting plate 1, and a mounting ring 34 is fixedly connected to the top of the reinforcement rod 33.

[0043] When in use, a second servo motor 17 is provided on both sides of the inner wall of the support plate 12. The staff turns on the power of the second servo motor 17, and the output end of the second servo motor 17 drives the transmission rod 18 to rotate. The transmission rod 18 drives the threaded rod 19 at one end to rotate, and the threaded rod 19 drives the threaded collar 20 connected to the surface to move, and the threaded collar 20 drives the assembly frame 21 at the bottom to move, and electric telescopic rods 22 are provided on both sides of the inner wall of the assembly frame 21. The staff turns on the power of the electric telescopic rod 22, and the electric telescopic rod 22 drives the erection plate 23 at the bottom to adjust the height, and the erection plate 23 is adjusted to the height of the bottom. A third servo motor 24 is provided on the inner wall. The staff connects the third servo motor 24 to a power source, and the output end of the third servo motor 24 drives the movable rod 25 to rotate. The movable rod 25 drives the driving gear 26 at the front end to rotate. The driving gear 26 drives the transmission gears 27 on both sides of the surface to rotate. The two transmission gears 27 drive the connecting rod 28 on the back to rotate relatively. The connecting rod 28 drives the rotating plate 29 at one end to rotate, so that the rotating plate 29 drives the arc-shaped strap 30 at the bottom to rotate. After the fixed chain 31 wraps the object, it is fixed with the buckle 32, and the arc-shaped strap 30 is clamped and limited on both sides of the object.

[0044] Embodiment 4:

[0045] See also Figures 1 to 6As shown, when lifting steel bars at a construction site, due to the long length of the steel bars, the items are first wrapped with a fixing chain 31, then fixed with a buckle 32, and the two sides of the items are clamped and limited by an arc-shaped strap 30. The weight of the two sides of the support plate 12 is controlled by a weight sensor. When the weight on one side is overloaded, the warning light 13 above the support plate 12 lights up, thereby adjusting the steel cable 11 and controlling the angle of the support plate 12, thereby keeping the weight of the items lifted from the bottom balanced, thereby ensuring stable lifting of the steel bars.

[0046] Working principle: when in use, the staff connects the first servo motor 5 to the power supply, and the output end of the first servo motor 5 drives the driving rod 6 to rotate, and the driving rod 6 drives the two transmission wheels 7 at the front end to rotate, and the two transmission wheels 7 both drive the transmission belt 8 to rotate, and the two transmission belts 8 both drive the driving wheel 9 connected to the inner wall to rotate, and the two driving wheels 9 respectively drive the winding rod 10 to rotate, so that the winding rod 10 drives the steel cable 11 connected to the surface to rotate in the same direction, so that the steel cable 11 on one side contracts and the steel cable 11 on the other side is released, and then the support plate 12 at the bottom end of the steel cable 11 can be controlled to adjust the inclination, and the weight on both sides of the support plate 12 is controlled by the weight sensor. When the weight on one side is overloaded, the warning light 13 above the support plate 12 lights up, thereby adjusting the steel cable 11 and controlling the angle of the support plate 12, thereby keeping the weight of the objects hoisted at the bottom balanced, and the bottom end of the connecting rod 14 is rotatably connected to the inner wall of the fixed splint 16 through the connecting block 15, so that during the tilting process of the support plate 12, the connecting rod 14 still keeps the support plate 12 Maintaining a stable pulling force, the staff connects the second servo motor 17 to the power supply, and the output end of the second servo motor 17 drives the transmission rod 18 to rotate, and the transmission rod 18 drives the threaded rod 19 at one end to rotate, and the threaded rod 19 drives the threaded collar 20 connected to the surface to move, and the threaded collar 20 drives the assembly frame 21 at the bottom to move, and the staff connects the electric telescopic rod 22 to the power supply, and the electric telescopic rod 22 drives the erection plate 23 at the bottom to adjust the height, and the staff connects the third servo motor 24 to the power supply, and the output end of the third servo motor 24 drives the movable rod 25 to rotate, and the movable rod 25 drives the driving gear 26 at the front end to rotate, and the driving gear 26 drives the transmission gears 27 on both sides of the surface to rotate, and the two transmission gears 27 drive the connecting rod 28 on the back to rotate relatively, and the connecting rod 28 drives the rotating plate 29 at one end to rotate, so that the rotating plate 29 drives the arc-shaped strap 30 at the bottom to rotate, and after the fixed chain 31 wraps the object, it is fixed with the buckle 32, and the arc-shaped strap 30 is clamped and limited on both sides of the object.

[0047] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0048] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0052] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0053] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A safe lifting device for construction, characterized in that: include: Mounting plate (1); Both sides of the top of the mounting plate (1) are fixedly connected to socket boxes (2), one side of the surface of the two socket boxes (2) is fixedly connected to a connection box (3), and the middle of the surface of the connection box (3) is fixedly connected to a protection box (4); A first servo motor (5) is fixedly connected to one side of the inner wall of the protection box (4), a driving rod (6) is installed at the output end of the first servo motor (5), and two transmission wheels (7) are fixedly connected to the front end of the driving rod (6), one side of the surface of the two transmission wheels (7) is rotatably connected to a transmission belt (8), one side of the inner wall of the two transmission belts (8) is rotatably connected to a driving wheel (9), one side of the back of the two driving wheels (9) is fixedly connected to a winding rod (10), and both ends of the winding rod (10) are rotatably connected to the inner wall of the socket box (2), one side of the surface of the winding rod (10) is wound with a steel cable (11), and the bottom end of the steel cable (11) is fixedly connected to a support plate (12).

2. A safety hoisting device for construction according to claim 1, characterized in that: Weight sensors are fixedly connected to both sides of the inner wall of the support plate (12), warning lights (13) are fixedly connected to both sides of the top of the support plate (12), and the warning lights (13) are electrically connected to each other.

3. A safety hoisting device for construction according to claim 1, characterized in that: A connecting rod (14) is fixedly connected to the middle of the bottom of the mounting plate (1), a connecting block (15) is fixedly connected to the bottom end of the connecting rod (14), a fixed clamping plate (16) is rotatably connected to the middle of both sides of the connecting block (15), and one side of the bottom of the fixed clamping plate (16) is fixedly connected to the top of the support plate (12).

4. A safety hoisting device for construction according to claim 1, characterized in that: A second servo motor (17) is fixedly connected to both sides of the inner wall of the support plate (12); a transmission rod (18) is installed at the output end of the second servo motor (17); a threaded rod (19) is fixedly connected to the front end of the transmission rod (18); and a threaded collar (20) is threadedly connected to one side of the surface of the threaded rod (19).

5. A safety hoisting device for construction according to claim 4, characterized in that: One side of the bottom of the threaded collar (20) is fixedly connected to an assembly frame (21), and one side of the top of the assembly frame (21) is overlapped with the bottom of the support plate (12). Both sides of the inner wall of the assembly frame (21) are fixedly connected to electric telescopic rods (22), and the bottom end of the electric telescopic rod (22) is fixedly connected to a mounting plate (23).

6. A safety hoisting device for construction according to claim 5, characterized in that: A third servo motor (24) is fixedly connected to one side of the inner wall of the mounting plate (23), a movable rod (25) is installed at the output end of the third servo motor (24), and a driving gear (26) is fixedly connected to the front end of the movable rod (25).

7. A safety hoisting device for construction according to claim 6, characterized in that: Both sides of the surface of the driving gear (26) are meshedly connected with transmission gears (27), and the middle parts of the backs of the two transmission gears (27) are fixedly connected with connecting rods (28).

8. A safety hoisting device for construction according to claim 7, characterized in that: One end of the connecting rod (28) is fixedly connected to a rotating plate (29), and one side of the bottom of the rotating plate (29) is fixedly connected to an arc-shaped strap (30).

9. A safe hoisting device for construction according to claim 1, characterized in that: One side of the bottom of the support plate (12) is fixedly connected to a plurality of sets of fixing chains (31), and one side of the bottom of the fixing chain (31) is fixedly connected to a buckle (32).

10. A safety hoisting device for construction according to claim 1, characterized in that: A reinforcement rod (33) is fixedly connected to the middle of the top of the mounting plate (1), and a mounting ring (34) is fixedly connected to the top of the reinforcement rod (33).

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