Lifting device for building steel structure net rack

Abstract

The utility model discloses a hoisting device for a building steel structure net rack, which comprises a support, a hoisting machine and a lifting frame, the hoisting machine is fixed above the support, the hoisting machine is driven by a first motor to wind a hoisting rope, the free end of the hoisting rope is fixedly connected with the lifting frame, and a left clamping piece and a right clamping piece are symmetrically arranged in the lifting frame. The upper end of the left clamping piece and the upper end of the right clamping piece are fixed to a second rotating shaft and a third rotating shaft which are connected with the lifting frame in a pivoted mode respectively, a left gear and a right gear which are meshed with each other are fixedly installed on the second rotating shaft and the third rotating shaft respectively, and the second rotating shaft and / or the third rotating shaft are / is driven by a second motor to rotate. A limiting assembly is arranged in the position, between the left clamping piece and the right clamping piece, of the symmetry plane in the lifting frame, the limiting assembly comprises a hollow cylinder which is vertically arranged and fixedly connected with the lifting frame, a moving rod is slidably connected into the hollow cylinder, the lower end of the moving rod is fixedly connected with a limiting plate, and the moving rod is connected into the hollow cylinder through an elastic piece. Tubular workpieces of different sizes can be clamped and fixed, and clamping is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of building steel structure grid construction, in particular to a lifting device for the building steel structure grid. Background Art

[0002] The grid structure is a spatial structure formed by connecting multiple rods through nodes in a certain grid form. It has the advantages of small spatial force, light weight, high rigidity, and good seismic performance. It can be used as the roof of buildings such as gymnasiums, theaters, and large conference rooms. There are two types of construction and installation methods for grid structures. One is the overall jacking method, overall lifting method, and overall hoisting method for ground assembly, and the other is the bulk assembly at high altitude, assembly in strips and blocks, and assembly in high altitude sliding.

[0003] The existing technology usually uses a crane or a gantry to lift the grid, which has unstable clamping, affecting the stability of the lifted workpiece, and cannot clamp and fix tubular workpieces of different sizes. It is easy to fall off the equipment during lifting, affecting the practicality of the equipment for lifting tubular workpieces. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a lifting device for a building steel structure grid.

[0005] The technical solution adopted by the utility model is a lifting device for a steel structure grid frame of a building, comprising a bracket, a hoist and a lifting frame, the hoist is fixed above the bracket, the hoist is driven by a first motor to reel in a lifting rope, the free end of the lifting rope is fixedly connected to the lifting frame, a left clamping member and a right clamping member are symmetrically arranged in the lifting frame, the upper ends of the left clamping member and the right clamping member are respectively fixed on a second rotating shaft and a third rotating shaft pivotally connected to the lifting frame, a left gear and a right gear meshing with each other are respectively fixedly installed on the second rotating shaft and the third rotating shaft, the second rotating shaft and / or the third rotating shaft is driven to rotate by the second motor, and a limit assembly is arranged in the lifting frame at a symmetrical plane position between the left clamping member and the right clamping member, the limit assembly comprises a hollow cylinder vertically arranged and fixedly connected to the lifting frame, a moving rod is slidably connected in the hollow cylinder, the lower end of the moving rod is fixedly connected to a limit plate, the moving rod is connected to the hollow cylinder through an elastic member, the left clamping member and the right clamping member are clamped on both sides of the tubular workpiece, the limit plate is against the upper side of the tubular workpiece, and the elastic member is compressed to press and fix the limit plate, the left clamping member and the right clamping member to fix the tubular workpiece.

[0006] Furthermore, the hoist includes a first motor fixed on the bracket, the output shaft of the first motor is fixedly connected to the first rotating shaft, the first rotating shaft is fixedly connected to the drum arranged on the bracket, and the drum is wound with a hoisting rope.

[0007] Furthermore, a plurality of groups of meshing left gears and right gears are arranged on the second rotating shaft and the third rotating shaft.

[0008] Furthermore, a plurality of groups of left clamping members and right clamping members are disposed on the second rotating shaft and the third rotating shaft.

[0009] Furthermore, the left clamping member and the right clamping member are provided with an inner arc concave surface facing the middle, and the limiting plate is provided with an inner arc concave surface facing downward.

[0010] Furthermore, the elastic member is a spring.

[0011] The utility model has the following beneficial effects:

[0012] 1. The tubular workpiece is clamped and fixed by the limit plate, the left clamp and the right clamp. Tubular workpieces of different sizes can be clamped and fixed. The clamping is convenient and stable. The tubular workpiece can be clamped more effectively and stably. The lifting is convenient and the clamping effect is good. It can ensure that the equipment will not detach from the equipment when lifting the tubular workpiece, affecting the practicality of the equipment lifting the tubular workpiece.

[0013] 2. When the utility model is used for hoisting different pipe fittings and equipment, it can reduce the input of manpower, has certain economic value for steel structure hoisting, and can also reduce the safety risks brought by workers' high-altitude operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a front view of the interior of the lifting frame of the utility model;

[0016] Figure 3 It is a side view of the interior of the lifting frame of the utility model.

[0017] In the figure: 1. bracket; 11. through slot; 2. hoist; 21. first motor; 22. first rotating shaft; 23. reel; 24. lifting rope; 3. lifting frame; 4. driving assembly; 41. second motor; 42. second rotating shaft; 43. left gear; 44. right gear; 45. third rotating shaft; 5. left clamping member; 6. right clamping member; 7. limit assembly; 71. hollow cylinder; 72. elastic member; 73. moving rod; 74. limit plate. DETAILED DESCRIPTION

[0018] In order to better understand the purpose, structure and function of the utility model, the following is a further detailed description of a lifting device for a building steel structure grid of the utility model in conjunction with the accompanying drawings.

[0019] like Figures 1 to 3As shown, a lifting device for a steel structure grid of a building comprises a support 1, a hoist 2 is installed above the support 1, the hoist 2 comprises a first motor 21, a first rotating shaft 22, a drum 23 and a lifting rope 24, the first motor 21 and the drum 23 are fixedly connected to the support 1, the first motor 21 is fixedly connected to the first rotating shaft 22, the first rotating shaft 22 is fixedly connected to the drum 23, the lifting rope 24 is wound on the drum 23, the free end of the lifting rope 24 is fixedly connected to the lifting frame 3, and a through slot 11 is provided on the support 1 for the lifting rope 24 to pass through. The first motor 21 drives the drum 23 to rotate through the first rotating shaft 22, thereby driving the lifting rope 24 to be wound up or wound up, and the lifting rope 24 further drives the lifting frame 3 to rise or fall, thereby driving the tubular workpiece clamped thereon to rise or fall.

[0020] The lifting frame 3 is provided with a driving assembly 4 and a limiting assembly 7, and the driving assembly 4 is provided with a plurality of left clamping members 5 and right clamping members 6. The driving assembly 4 includes a second motor 41, a second rotating shaft 42, a left gear 43, a right gear 44 and a third rotating shaft 45. The second motor 41 is fixedly connected to the lifting frame 3, the second motor 41 is fixedly connected to the second rotating shaft 42, the second rotating shaft 42 is rotationally connected to the lifting frame 3, the second rotating shaft 42 is fixedly connected to the left gear 43, the left gear 43 is meshed with the right gear 44, the right gear 44 is fixedly connected to the third rotating shaft 45, the third rotating shaft 45 is rotationally connected to the lifting frame 3, the second rotating shaft 42 is fixedly connected to the left clamping member 5, and the third rotating shaft 45 is fixedly connected to the right clamping member 6.

[0021] The limiting assembly 7 includes a hollow cylinder 71, an elastic member 72, a moving rod 73 and a limiting plate 74. The hollow cylinder 71 is fixedly connected to the lifting frame 3, the elastic member 72 is arranged in the hollow cylinder 71, the moving rod 73 is slidably connected to the hollow cylinder 71, and the moving rod 73 is fixedly connected to the limiting plate 74. The elastic member 72 can be a spring. When the limiting assembly 7 and the lifting frame 3 are synchronously lowered, the limiting plate 74 abuts against the tubular workpiece. The lifting frame 3 continues to descend, and the tubular workpiece abuts against and squeezes the limiting plate 74. The limiting plate 74 squeezes the elastic member 72 through the moving rod 73, and cooperates with the left clamping member 5 and the right clamping member 6 to clamp the tubular workpiece, thereby being able to clamp the tubular workpiece more effectively and stably.

[0022] The number of left gears 43 and right gears 44 can be set according to demand. The more the number is set, the smaller the load of a single gear is. In addition, multiple gears can be set to effectively prevent a single gear from being damaged, resulting in loss of limiting function and causing an accident. The left clamp 5 and the right clamp 6 are provided with an inner arc concave surface facing the middle, and the limiting plate 74 is provided with an inner arc concave surface facing downward. The limiting assembly 7 is arranged between the left clamp 5 and the right clamp 6. The second motor 41 drives the second rotating shaft 42 to rotate, and the second rotating shaft 42 drives the left clamp 5 to rotate synchronously. The second rotating shaft 42 drives the third rotating shaft 45 to rotate through the left gear 43 and the right gear 44, and the third rotating shaft 45 drives the right clamp 6 to rotate synchronously, thereby making the left clamp 5 and the right clamp 6 close to each other, cooperating with the limiting assembly 7, and effectively clamping the tubular workpiece.

[0023] When in use, place the tubular workpiece under the bracket 1 and start the hoist 2. The hoist 2 lowers the lifting frame 3 and the driving component 4, the limiting component 7, the left clamping member 5 and the right clamping member 6 thereon. When it descends to the preset position, the limiting component 7 contacts and squeezes the tubular workpiece. The hoist 2 continues to lower the lifting frame 3 until it descends to the preset position, and starts the driving component 4. The driving component 4 drives the left clamping member 5 and the right clamping member 6 to approach each other and thus clamp the tubular workpiece, cooperate with the limiting component 7, and then clamp the tubular workpiece. The hoist 2 lifts the lifting frame 3, and then cooperates with the limiting component 7, the driving component 4, the left clamping member 5 and the right clamping member 6 to smoothly lift the tubular workpiece to a preset height.

[0024] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A lifting device for building steel structure grid, It is characterized in that The invention comprises a support (1), a hoist (2) and a lifting frame (3), wherein the hoist (2) is fixed above the support (1), the hoist (2) drives a winding rope (24) through a first motor (21), the free end of the rope (24) is fixedly connected to the lifting frame (3), a left clamping member (5) and a right clamping member (6) are symmetrically arranged in the lifting frame (3), the upper ends of the left clamping member (5) and the right clamping member (6) are respectively fixed to a second rotating shaft (42) and a third rotating shaft (45) pivotally connected to the lifting frame (3), a left gear (43) and a right gear (44) meshing with each other are respectively fixedly installed on the second rotating shaft (42) and the third rotating shaft (45), and the second rotating shaft (42) and / or the third rotating shaft (45) are driven by a second motor to rotate. (41) is driven to rotate, and a limit assembly (7) is arranged in the lifting frame (3) at a symmetrical plane position between the left clamping member (5) and the right clamping member (6), the limit assembly (7) comprising a hollow cylinder (71) vertically arranged and fixedly connected to the lifting frame (3), a moving rod (73) being slidably connected in the hollow cylinder (71), a lower end of the moving rod (73) being fixedly connected to a limit plate (74), the moving rod (73) being connected to the hollow cylinder (71) via an elastic member (72), the left clamping member (5) and the right clamping member (6) being clamped on both sides of the tubular workpiece, the limit plate (74) being pressed against the upper side of the tubular workpiece, and the elastic member (72) being compressed so that the limit plate (74), the left clamping member (5) and the right clamping member (6) are pressed and fixed to the tubular workpiece.

2. The lifting device for building steel structure grid according to claim 1, It is characterized in that The hoist (2) comprises a first motor (21) fixed on the bracket (1); the output shaft of the first motor (21) is fixedly connected to a first rotating shaft (22); the first rotating shaft (22) is fixedly connected to a reel (23) arranged on the bracket (1); and a hoisting rope (24) is wound around the reel (23).

3. The lifting device for building steel structure grid according to claim 1, It is characterized in that A plurality of groups of meshing left gears (43) and right gears (44) are arranged on the second rotating shaft (42) and the third rotating shaft (45).

4. The lifting device for building steel structure grid according to claim 1 or 3, It is characterized in that A plurality of groups of left clamping members (5) and right clamping members (6) are arranged on the second rotating shaft (42) and the third rotating shaft (45).

5. The lifting device for building steel structure grid according to claim 1, It is characterized in that The left clamping member (5) and the right clamping member (6) are provided with inner arc concave surfaces facing the middle, and the limiting plate (74) is provided with an inner arc concave surface facing downward.

6. The lifting device for building steel structure grid according to claim 1, It is characterized in that The elastic member (72) is a spring.

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