Electric lifting device applied to curtain wall truss construction

Abstract

The invention relates to the field of curtain wall truss construction, and particularly discloses an electric lifting device applied to curtain wall truss construction, which comprises a movable bracket, an elevator, a horizontal position correction assembly, a suspension seat and a counterweight assembly, and is characterized in that accurate horizontal adjustment is realized through a position correction slide rail, a slide block and a bidirectional screw rod in the horizontal position correction assembly; and meanwhile, the stability is ensured through the symmetrical design of the suspension seat and the counterweight assembly, and the smoothness of the lifting process is further optimized through the double-rope-penetrating-pipe structure of the elevator. The electric lifting device has the adjusting capacity of stable adjustment in the horizontal direction.

Description

Technical Field

[0001] This application relates to the field of curtain wall truss construction, and particularly to an electric lifting device applied to curtain wall truss construction. Background Art

[0002] At present, electric lifting devices are widely used in fields such as building construction and maintenance, and particularly play an important role in high-altitude operations. With the acceleration of the urbanization process, the number of high-rise buildings is increasing continuously, and the demand for high-altitude operation equipment is also growing day by day. Such equipment not only needs to meet safety requirements, but also needs to have high operation flexibility and space adaptability to adapt to complex and changeable construction environments. In curtain wall truss construction, electric lifting devices are even more indispensable key tools, and their performance directly affects construction efficiency and the safety of operators.

[0003] In related technologies, in order to achieve high-altitude operations, electric hanging baskets or lifting platforms with single-degree-of-freedom vertical lifting are usually adopted. These devices mainly drive steel ropes through electric motors to achieve vertical displacement.

[0004] For the above-mentioned related technologies, there are the following defects: Most of the electric lifting devices in the prior art only support single-degree-of-freedom displacement movement in the vertical axis direction and lack the ability to adjust in the horizontal direction, resulting in a limited working envelope space and being difficult to adapt to complex and changeable construction environments. Summary of the Invention

[0005] In order to enable the electric lifting device to have the ability to adjust in the horizontal direction, this application provides an electric lifting device applied to curtain wall truss construction.

[0006] The electric lifting device applied to curtain wall truss construction provided by this application adopts the following technical solutions: An electric lifting device applied to curtain wall truss construction includes a movable support, a hoist, a horizontal alignment assembly, a suspended seat, and a counterweight assembly. The hoist is installed on the movable support; The horizontal alignment assembly includes an alignment slide rail, a first slider, and a second slider. The alignment slide rail is horizontally installed on the movable support; The first slider and the second slider are symmetrically arranged on both sides of the hoist and are both slidably connected to the alignment slide rail; The suspended seat is connected to the first slider; the counterweight assembly is connected to the second slider.

[0007] By adopting the above technical solution, the combination of the movable support and the hoist ensures the accurate and stable movement of the suspended seat in the vertical direction, meeting the requirements of high-altitude operations. The design of the horizontal alignment component, including the alignment slide rail, the first slider, and the second slider, enables the suspended seat and the counterweight component to maintain balance in the horizontal direction, effectively preventing tilting and enhancing the overall stability. The suspended seat is connected to the first slider, and the counterweight component is connected to the second slider. By arranging them symmetrically on both sides, dynamic balance is achieved, making it difficult for the suspended seat to tilt when moving in the horizontal direction, further enhancing the safety and reliability of the system.

[0008] Preferably, a first rope-passing pipe is provided at the upper end of the hoist, and the steel wire rope at the upper end of the hoist passes through the inside of the first rope-passing pipe; a second rope-passing pipe is provided at the upper end of the hoist, and the steel wire rope at the lower end of the hoist passes through the inside of the second rope-passing pipe.

[0009] By adopting the above technical solution, the arrangement of the first rope-passing pipe and the second rope-passing pipe makes the routing of the steel wire rope at the upper and lower ends of the hoist more regular and orderly, and separates the steel wire rope from the movable support, the horizontal alignment component, the suspended seat, and the counterweight component, effectively reducing the friction between the steel wire rope and other components and prolonging the service life of the steel wire rope. At the same time, it avoids the entanglement between the steel wire rope and other components. This design helps the hoist to control the lifting and lowering of the steel wire rope more precisely and stably, thus ensuring the more stable and reliable movement of the suspended platform in the vertical direction.

[0010] Preferably, the horizontal alignment component further includes a bidirectional lead screw, which is rotatably connected to the alignment slide rail and is screwed to the first slider at one end and the second slider at the other end.

[0011] By adopting the above technical solution, the bidirectional lead screw is rotatably connected to the alignment slide rail and is screwed to the first slider and the second slider respectively, so that the rotation of the bidirectional lead screw can drive the first slider and the second slider to move synchronously in the opposite direction and approach each other synchronously. This design enables the suspended seat to always achieve dynamic balance with the counterweight component in the horizontal direction when adjusting the horizontal position, avoiding tilting of the suspended seat after adjusting the horizontal position.

[0012] Preferably, the suspended seat and the counterweight component are respectively located on both sides of the width direction of the alignment slide rail; A first side bracket is connected between the suspended seat and the first slider; a second side bracket is connected between the counterweight component and the second slider.

[0013] By adopting the above technical solution, the suspended seat and the counterweight component are respectively located on both sides of the width direction of the alignment slide rail. This layout can effectively balance the force of the electric lifting device in the horizontal direction and improve the stability of the overall structure.

[0014] Preferably, the backrest of the suspended seat is connected to the first side bracket; A tool box is provided at the armrest of the suspended seat.

[0015] By adopting the above technical solution, the backrest of the suspended seat is connected to the first side bracket, which can ensure the stability of the seat during the lifting process and improve the operation safety of the operator; the tool box is arranged at the armrest, which is convenient for the operator to store and pick up tools, improves work efficiency, and at the same time avoids the risk of tool dropping, enhancing the practicability of the overall device.

[0016] Preferably, a hip limiting member is provided on the seat of the suspended seat, which is arranged opposite to the backrest.

[0017] By adopting the above technical solution, the hip limiting member arranged opposite to the backrest on the seat of the suspended seat can effectively limit the lateral movement of the operator on the seat, improve the stability during operation, and reduce the potential safety hazards caused by body shaking during the operation process.

[0018] Preferably, the lower end of the seat is provided with front chair legs and rear chair legs, and a plurality of horizontally arranged foot limiting rods are provided on the front chair legs, and the plurality of foot limiting rods are vertically spaced apart.

[0019] By adopting the above technical solution, the front chair legs and rear chair legs are arranged at the lower end of the seat, enhancing the structural stability of the suspended seat. The plurality of horizontally arranged foot limiting rods vertically spaced apart on the front chair legs can effectively limit the movement range of the operator's feet, improve the safety during operation, and at the same time provide a more comfortable supporting effect for the operator.

[0020] Preferably, the counterweight assembly includes a plurality of counterweight blocks connected to the second side bracket.

[0021] By adopting the above technical solution, the counterweight assembly is composed of a plurality of counterweight blocks, and the counterweight mass can be flexibly adjusted according to actual needs. This design not only improves the adaptability of the device but also ensures the balance of the suspended seat under different working conditions, thereby enhancing the safety of the operator and the operation stability.

[0022] Preferably, the counterweight block is detachably connected to the second side bracket.

[0023] By adopting the above technical solution, the detachable connection design between the counterweight block and the second side bracket enables the number and position of the counterweight blocks to be flexibly adjusted according to actual construction requirements. This design not only facilitates the assembly and disassembly of the device but also can accurately adjust the counterweight according to the weight changes of the operator and tools on the suspended seat, thereby ensuring the balance and stability of the electric lifting device during operation, effectively enhancing the overall safety and reducing the risk of equipment damage.

[0024] Preferably, the adjacent two counterweight blocks are detachably connected.

[0025] By adopting the above technical solution, the detachable connection design between the counterweight blocks enables the number and weight of the counterweight blocks to be flexibly adjusted according to actual requirements. This design not only facilitates on-site installation and maintenance, but also can meet the balance requirements of different construction scenarios, effectively improving the applicability and safety of the electric lifting device.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. In the present application, through the setting of the horizontal alignment component, the suspended seat and the counterweight component can approach or move away from each other synchronously in the horizontal direction, realizing the horizontal adjustment and movement of the suspended seat, effectively reducing the inclination or deviation of the suspended seat during operation, and improving the stability and safety of the overall system.

[0027] 2. In the present application, the symmetrical layout of the suspended seat and the counterweight component combined with the drive of the bidirectional lead screw not only enhances the balance performance of the equipment, but also significantly expands the working envelope space, improving the spatial adaptability of the device in complex construction environments.

[0028] 3. In the present application, the design of the hoist in cooperation with the steel wire rope and the rope threading pipe ensures that the suspended platform can move accurately and smoothly in the vertical direction, while being convenient for maintenance and operation, further improving the construction efficiency and the safety guarantee of the operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 is the overall structural schematic diagram of the embodiment of the present application; Figure 2 is the internal structural schematic diagram of the embodiment of the present application.

[0031] Reference Numerals: 1. Movable support; 2. Hoist; 21. Steel wire rope; 22. First rope-passing pipe; 23. Second rope-passing pipe; 24. Pulley; 20. Safety lock; 3. Horizontal alignment assembly; 31. Alignment slide rail; 311. First slider; 312. Second slider; 32. Bi-directional lead screw; 33. Servo motor; 331. Driving wheel; 332. Driven wheel; 333. Belt; 4. Suspended seat; 40. First side support; 41. Seat; 42. Backrest; 43. Armrest; 44. Tool box; 45. Hip position-limiting member; 46. Front chair leg; 47. Foot position-limiting rod; 48. Rear chair leg; 5. Counterweight assembly; 50. Second side support; 51. Counterweight block; 6. Electrical control system; 7. Top slide rail; 71. Top slider. Detailed implementation manners

[0032] The following further elaborates on this application Figure 1-2 in conjunction with the appended drawings.

[0033] An embodiment of this application discloses an electric lifting device applied to curtain wall truss construction.

[0034] Referring to Figure 1 and Figure 2 , an electric lifting device applied to curtain wall truss construction includes a movable support 1, a hoist 2, a horizontal alignment assembly 3, a suspended seat 4, and a counterweight assembly 5. The hoist 2 is installed on the movable support 1. The horizontal alignment assembly 3 includes an alignment slide rail 31, a first slider 311, and a second slider 312. The alignment slide rail 31 is horizontally installed on the movable support 1. The first slider 311 and the second slider 312 are symmetrically arranged on both sides of the hoist 2 and are both slidably connected to the alignment slide rail 31. The suspended seat 4 is connected to the first slider 311. The counterweight assembly 5 is connected to the second slider 312. An electrical control system 6 for controlling the hoist 2, the horizontal alignment assembly 3, and other electrical control components included in the electric lifting device is provided on the suspended seat 4. Here, the electrical control system 6 is a conventional control system in the prior art, and being provided on the suspended seat 4 can facilitate the construction personnel to control the movement of the suspended seat 4.

[0035] Referring to Figure 1 and Figure 2, where the curtain wall truss is a fishbone-shaped wind-resistant truss. When installing the curtain wall, the wind-resistant truss is arranged vertically, and multiple wind-resistant trusses are distributed at intervals along the outer edge of the building. In the embodiment of the present application, the steel wire rope 21 at the upper end of the hoist 2 is connected to the building through the pulley 24. When constructing the wind-resistant truss, the position of the suspended seat 4 in the vertical direction is adjusted by the hoist 2. When it is necessary to further horizontally adjust the horizontal position of the suspended seat 4, the first slider 311 and the second slider 312 are made to approach or move away synchronously to achieve the purpose of adjusting the horizontal position of the suspended seat 4. Here, the sum of the weights of the suspended seat 4, the construction workers and the tools should be equal to the weight of the counterweight assembly 5 to ensure that the suspended seat 4 and the counterweight assembly 5 can maintain dynamic balance to the greatest extent during the movement, so that the suspended seat 4 is not prone to large tilts, ensuring that the construction workers can stably perform construction operations such as welding and bolt connection on the wind-resistant truss.

[0036] Refer to Figure 1 and Figure 2 , in other embodiments, a top slide rail 7 connected to the building is provided above the hoist 2, and a top slider is provided on the top slide rail 7. The steel wire rope 21 at the upper end of the hoist 2 is connected to the top slider through the pulley 24. When constructing the wind-resistant truss, through the coordinated cooperation of the top slide rail 7 and the top slider, the horizontal position of the suspended seat 4 is roughly adjusted first, and then the position of the suspended seat 4 in the vertical direction is adjusted by the hoist 2. Here, the hoist 2 is a conventional steel wire rope hoist 2. During the construction of the wind-resistant truss, when it is necessary to further horizontally adjust the horizontal position of the suspended seat 4 over a short distance, the first slider 311 and the second slider 312 are made to approach or move away synchronously to achieve the purpose of adjusting the horizontal position of the suspended seat 4. Here, the sum of the weights of the suspended seat 4, the construction workers and the tools should be equal to the weight of the counterweight assembly 5 to ensure that the suspended seat 4 and the counterweight assembly 5 can maintain dynamic balance to the greatest extent during the movement, so that the suspended seat 4 is not prone to large tilts, ensuring that the construction workers can stably perform construction operations such as welding and bolt connection on the wind-resistant truss.

[0037] Refer to Figure 1 and Figure 2, a first rope threading tube 22 is provided at the upper end of the hoist 2, and the steel wire rope 21 at the upper end of the hoist 2 passes through the inside of the first rope threading tube 22. A safety lock 20 is provided on the first rope threading tube 22, and the steel wire rope 21 at the upper end of the hoist 2 passes through the safety lock 20. The safety lock 20 can be selected according to the model of the hoist 2, and any conventional safety lock 20 can be used. The safety lock 20 prevents safety accidents caused by the accidental fall of the hoist 2, the breakage of the steel wire rope 21 or system failures. A second rope threading tube 23 is provided at the upper end of the hoist 2, and the steel wire rope 21 at the lower end of the hoist 2 passes through the inside of the second rope threading tube 23. In the embodiment of the present application, the settings of the first rope threading tube 22 and the second rope threading tube 23 make the routing of the steel wire rope 21 at the upper and lower ends of the hoist 2 more regular and orderly, and isolate the steel wire rope 21 from the movable bracket 1, the horizontal alignment assembly 3, the suspension seat 4 and the counterweight assembly 5, effectively reducing the friction between the steel wire rope 21 and other components and extending the service life of the steel wire rope 21. At the same time, it avoids entanglement between the steel wire rope 21 and other components. This design helps the hoist 2 to control the lifting and lowering of the steel wire rope 21 more accurately and stably, thereby ensuring that the suspension platform moves more stably and reliably in the vertical direction.

[0038] Refer to Figure 1 and Figure 2 , the horizontal alignment assembly 3 further includes a bidirectional lead screw 32. The bidirectional lead screw 32 is rotatably connected to the alignment slide rail 31, and one end is screwed to the first slider 311 and the other end is screwed to the second slider 312. Specifically, a driven wheel 332 is provided in the middle of the bidirectional lead screw 32, a servo motor 33 is provided on the alignment slide rail 31, a driving wheel 331 is provided on the servo motor 33, and the driving wheel 331 and the driven wheel 332 are connected by a belt 333. By driving the driving wheel 331 to rotate through the servo motor 33, the driving wheel 331 drives the driven wheel 332 to rotate through the belt 333, the driven wheel 332 drives the bidirectional lead screw 32 to rotate, and then the bidirectional lead screw 32 drives the first slider 311 and the second slider 312 to approach or move away synchronously. This design enables the suspension seat 4 to always achieve dynamic balance with the counterweight assembly 5 in the horizontal direction when adjusting the horizontal position, avoiding tilting of the suspension seat 4 after adjusting the horizontal position.

[0039] Refer to Figure 1 and Figure 2, the suspension seat 4 and the counterweight assembly 5 are respectively located on both sides of the width direction of the alignment slide rail 31. The suspension seat 4 and the first slider 311 are connected with a first side bracket 40. The counterweight assembly 5 and the second slider 312 are connected with a second side bracket 50. In the embodiment of the present application, the suspension seat 4 and the counterweight assembly 5 are respectively located on both sides of the width direction of the alignment slide rail 31, and at the same time, the suspension seat 4 and the counterweight assembly 5 are also located on the side of the hoist 2. This layout can effectively balance the force of the electric lifting device in the horizontal direction, improve the stability of the overall structure, and at the same time separate the suspension seat 4, the counterweight assembly 5 and the hoist 2 in the horizontal direction to prevent the suspension seat 4 and the counterweight assembly 5 from affecting the operation of the wire rope 21 of the hoist 2.

[0040] Reference Figure 1 and Figure 2 The backrest 42 of the suspension seat 4 is connected to the first side bracket 40. A tool frame 44 is provided at the armrest 43 of the suspension seat 4. In the embodiment of the present application, the backrest 42 of the suspension seat 4 is connected to the first side bracket 40, which can ensure that the seat remains stable during the lifting process and improve the operating safety of the operator. The tool frame 44 is provided at the armrest 43 to facilitate the operator to store and take tools, improve work efficiency, avoid the risk of tool falling, and enhance the applicability of the overall device.

[0041] Reference Figure 1 and Figure 2 The seat 41 of the suspension seat 4 is provided with a hip stopper 45 which is arranged opposite to the backrest 42. In the embodiment of the present application, the seat 41 of the suspension seat 4 is provided with a hip stopper 45 which is arranged opposite to the backrest 42, which can effectively limit the lateral movement of the operator on the suspension seat 4, making it difficult for the operator to move forward of the suspension seat 4, thereby improving the stability during operation and reducing the potential safety hazards caused by body shaking during operation.

[0042] Reference Figure 1 and Figure 2 , the lower end of the seat 41 is provided with a front leg 46 and a rear leg 48, and the front leg 46 is provided with a plurality of horizontally arranged foot limit rods 47, and the plurality of foot limit rods 47 are vertically spaced. In the embodiment of the present application, the front leg 46 and the rear leg 48 are provided at the lower end of the seat 41, which enhances the structural stability of the suspension seat 4. The front leg 46 is horizontally provided with a plurality of vertically spaced foot limit rods 47, which can effectively limit the movement range of the operator's feet, improve the safety during operation, and provide a more comfortable support effect for the operator.

[0043] Reference Figure 1 and Figure 2, the counterweight assembly 5 includes a plurality of counterweight blocks 51 connected to the second side bracket 50. In the embodiment of the present application, the counterweight assembly 5 is composed of a plurality of counterweight blocks 51, and the counterweight mass can be flexibly adjusted according to actual needs. This design not only improves the adaptability of the device, but also ensures the balance of the suspended seat 4 under different working conditions, thereby enhancing the safety of the operator and the operation stability.

[0044] Refer to Figure 1 and Figure 2 , the counterweight block 51 is detachably connected to the second side bracket 50. After the plurality of counterweight blocks 51 are installed on the second side bracket 50, there should be no relative movement between the counterweight block 51 and the second side bracket 50 to avoid the situation where the counterweight block 51 swings and endangers the construction personnel. Specifically, the counterweight block 51 can be fixedly connected to the second side bracket 50 by means of bolts. In the embodiment of the present application, the detachable connection design between the counterweight block 51 and the second side bracket 50 enables the number and position of the counterweight blocks 51 to be flexibly adjusted according to actual construction needs. This design not only facilitates the assembly and disassembly of the device, but also can accurately adjust the counterweight according to the weight changes of the operator and tools on the suspended seat 4, thereby ensuring the balance and stability of the electric lifting device during operation, effectively enhancing the overall safety and reducing the risk of equipment damage.

[0045] Refer to Figure 1 and Figure 2 , adjacent two counterweight blocks 51 are detachably connected by connection means such as bolt connection. In the embodiment of the present application, the detachable connection design between the counterweight blocks 51 enables the number and weight of the counterweight blocks 51 to be flexibly adjusted according to actual needs. This design not only facilitates on-site installation and maintenance, but also can meet the balance requirements of different construction scenarios, effectively enhancing the applicability and safety of the electric lifting device.

[0046] The implementation principle of an electric lifting device applied to curtain wall truss construction in an embodiment of the present application is as follows: When constructing the wind-resistant truss, through the coordinated cooperation of the top slide rail 7 and the top slider, the horizontal position of the suspended seat 4 is first roughly adjusted over a long distance, and then the position of the suspended seat 4 in the vertical direction is adjusted by the hoist 2.

[0047] When it is necessary to further finely adjust the horizontal position of the suspended seat 4 over a short distance, the first slider 311 and the second slider 312 are made to approach or move away synchronously to achieve the purpose of adjusting the horizontal position of the suspended seat 4.

[0048] Among them, the servo motor 33 drives the driving wheel 331 to rotate. The driving wheel 331 drives the driven wheel 332 to rotate through the belt 333. The driven wheel 332 drives the bidirectional lead screw 32 to rotate. Furthermore, the bidirectional lead screw 32 drives the first slider 311 and the second slider 312 to approach or move away from each other synchronously. The sum of the weights of the suspension seat 4, the construction worker, and the tools should be equal to the weight of the counterweight assembly 5, ensuring that the suspension seat 4 and the counterweight assembly 5 can maintain the dynamic balance to the greatest extent during the movement, making the suspension seat 4 not prone to large tilts, and ensuring that the construction worker can stably perform construction operations such as welding and bolt connection on the wind truss.

[0049] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the art to which this application pertains. The terms "first", "second", "third", and similar terms used in the specification and claims of this application do not denote any order, quantity, or importance, but are only used to distinguish different components. The terms "a" or "an", etc., do not denote a quantity limitation, but mean that there is at least one. The terms "comprising" or "including", etc., mean that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms "up", "down", "left", "right", etc., are only used to indicate the relative positional relationship. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0050] The above are all optional embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. An electric lifting device used in curtain wall truss construction, characterized by: It comprises a movable support (1), a hoist (2), a horizontal alignment assembly (3), a suspension seat (4) and a counterweight assembly (5), wherein the hoist (2) is mounted on the movable support (1); The horizontal alignment assembly (3) comprises an alignment slide rail (31), a first slider (311) and a second slider (312); the alignment slide rail (31) is horizontally mounted on the movable bracket (1); The first sliding block (311) and the second sliding block (312) are symmetrically arranged on both sides of the elevator (2), and are both slidably connected to the alignment slide rail (31); The suspension seat (4) is connected to the first sliding block (311); The counterweight assembly (5) is connected to the second sliding block (312).

2. The electric lifting device used in curtain wall truss construction according to claim 1 is characterized in that: A first rope threading tube (22) is provided at the upper end of the hoist (2), and the steel wire rope (21) at the upper end of the hoist (2) passes through the inner side of the first rope threading tube (22); A second rope threading tube (23) is provided at the upper end of the hoist (2), and the steel wire rope (21) at the lower end of the hoist (2) passes through the inner side of the second rope threading tube (23).

3. The electric lifting device used in curtain wall truss construction according to claim 1 is characterized in that: The horizontal alignment assembly (3) further comprises a bidirectional screw rod (32), which is rotatably connected to the alignment slide rail (31), and has one end threadedly connected to the first slider (311) and the other end threadedly connected to the second slider (312).

4. The electric lifting device used in curtain wall truss construction according to claim 1 is characterized in that: The suspension seat (4) and the counterweight assembly (5) are respectively located on both sides of the alignment slide rail (31) in the width direction; The suspension seat (4) and the first slider (311) are connected to a first side bracket (40); the counterweight assembly (5) and the second slider (312) are connected to a second side bracket (50).

5. The electric lifting device used in curtain wall truss construction according to claim 4 is characterized in that: The backrest (42) of the suspension seat (4) is connected to the first side bracket (40); A tool frame (44) is provided at the armrest (43) of the suspension seat (4).

6. The electric lifting device used in curtain wall truss construction according to claim 5 is characterized in that: The seat (41) of the suspension seat (4) is provided with a hip limiter (45) arranged opposite to the backrest (42).

7. The electric lifting device used in curtain wall truss construction according to claim 6 is characterized in that: The lower end of the seat (41) is provided with a front leg (46) and a rear leg (48), and the front leg (46) is provided with a plurality of horizontally arranged foot limit rods (47), and the plurality of foot limit rods (47) are vertically spaced and distributed.

8. The electric lifting device used in curtain wall truss construction according to claim 4 is characterized in that: The counterweight assembly (5) comprises a plurality of counterweight blocks (51) connected to the second side bracket (50).

9. The electric lifting device used in curtain wall truss construction according to claim 8 is characterized in that: The counterweight block (51) is detachably connected to the second side bracket (50).

10. The electric lifting device used in curtain wall truss construction according to claim 8, characterized in that: Two adjacent counterweight blocks (51) are detachably connected.

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