Prefabricated box girder reinforcement cage hoisting mechanical claw

Abstract

The utility model discloses a prefabricated box girder reinforcement cage hoisting mechanical gripper, which belongs to the technical field of prefabricated box girders, and comprises a plurality of hoisting boxes, inner cavities of the plurality of hoisting boxes are respectively and rotatably connected with a first two-way screw rod, and the outer sides of the two ends of the plurality of first two-way screw rods are respectively and threadedly connected with a grabbing plate in a sleeving manner; the bottom ends of the grabbing plates extend to the bottom of the hanging box and are fixedly connected with supporting claws, and a first motor is fixedly installed at the end of the hanging box. According to the steel reinforcement framework grabbing device, the first motor is used for driving the first two-way lead screw to rotate, the first two-way lead screw and the grabbing plates are matched in a threaded mode to drive the grabbing plates to extrude and fix the side portion of a steel reinforcement framework, the supporting claws are used for supporting the bottom of the steel reinforcement framework, and the multiple sets of grabbing plates and the supporting claws are used for grabbing the steel reinforcement framework; and the stability and convenience of grabbing the steel reinforcement framework are guaranteed, and the practicability of the prefabricated box girder steel reinforcement framework hoisting mechanical gripper is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of precast box girders, and more specifically, to a hoisting mechanical claw for the steel bar framework of a precast box girder. Background Technique

[0002] A box girder is a type of beam in bridge engineering, with a hollow interior and flanges on both sides of the upper part, similar to a box. During the bridge construction process, various precast box girder formworks are usually assembled by steel bar binding, including precast box girder bottom forms, precast box girder side forms, precast box girder binding tire forms, etc. After the steel bars are bound for each formwork, they need to be combined together, and then poured after being mixed with cement and sand to complete the manufacturing of the bridge section. The steel bar framework therein needs to be lifted by a crane. Since the steel bar framework in the precast box girder is relatively long, multiple lifting points are generally required during lifting. Existing cranes generally lift the steel bar framework through steel wire ropes or hooks, which is rather cumbersome during the lifting process of the steel bar framework, requiring the installation and disassembly of steel wire ropes or hooks, and it is not easy to ensure the stability during lifting. Therefore, we propose a hoisting mechanical claw for the steel bar framework of a precast box girder. Content of the Utility Model

[0003] Aiming at the problems mentioned in the above background technique, the purpose of the utility model is to provide a hoisting mechanical claw for the steel bar framework of a precast box girder.

[0004] To solve the above problems, the utility model adopts the following technical solutions:

[0005] A hoisting mechanical claw for the steel bar framework of a precast box girder includes a plurality of hanging boxes. The inner cavities of the plurality of hanging boxes are respectively rotatably connected with first bidirectional lead screws. The outer sides of both ends of the plurality of first bidirectional lead screws are respectively threadedly sleeved with grabbing plates. The bottom ends of the grabbing plates all extend to the bottom of the hanging boxes and are fixedly connected with supporting claws. A first motor is fixedly installed at the end of the hanging box, and the output shaft of the first motor is connected with the end of the first bidirectional lead screw. An extrusion mechanism is arranged on the outer sides of two of the hanging boxes. The top surfaces of the plurality of hanging boxes are respectively fixedly connected with connecting seats. A plurality of support connection mechanisms are respectively arranged between two adjacent connecting seats. The support connection mechanism includes a support sliding tube fixedly sleeved on the side of one connecting seat and a support sliding rod fixedly connected to the side of the other connecting seat. The support sliding rod slides into the inner cavity of the support sliding tube. A spacing adjustment mechanism is respectively arranged between two adjacent hanging boxes.

[0006] As a preferred embodiment of the present utility model, the spacing adjustment mechanism includes an adjustment box fixedly connected to one side of a hanging box and a connection block fixedly connected to one side of the other hanging box. A second bidirectional lead screw is rotatably connected to the inner cavity of the adjustment box. Both ends of the second bidirectional lead screw are respectively threadedly sleeved with moving seats. The side parts of the two moving seats are respectively rotatably connected with adjustment rods. The end parts of the two adjustment rods are respectively connected to the connection block. A second motor is fixedly installed at the end of the adjustment box. The output shaft of the second motor is connected to the end of the second bidirectional lead screw. The inner wall of the adjustment box is in contact with the side surface of the moving seat.

[0007] As a preferred embodiment of the present utility model, the extrusion mechanism includes a mounting seat fixedly connected to one side of the hanging box. A plurality of electric push rods are fixedly installed on the mounting seat. The output ends of the plurality of electric push rods all extend to the bottom of the mounting seat and are fixedly connected with an extrusion plate.

[0008] As a preferred embodiment of the present utility model, two reinforcing rods are fixedly sleeved in the inner cavity of the hanging box. The two reinforcing rods are respectively movably sleeved with two grasping plates. The side surface of the grasping plate is in contact with the inner wall of the hanging box.

[0009] As a preferred embodiment of the present utility model, a plurality of hanging rings are fixedly connected to the top surfaces of the two connecting seats.

[0010] As a preferred embodiment of the present utility model, a controller is provided on the top of one of the hanging boxes. The controller is electrically connected to the first motor, the second motor, and the electric push rods respectively.

[0011] Compared with the prior art, the advantages of the present utility model are as follows:

[0012] (1) In the present utility model, the positions of the two moving seats are adjusted by the threaded fit between the second bidirectional lead screw and the moving seats. The distance between the two hanging boxes is adjusted by the cooperation of the moving seats, the adjustment rods, and the connection block, so as to adjust the overall length of the mechanical claw to adapt to grasping steel bar skeletons of different lengths. In addition, the first motor is used to drive the first bidirectional lead screw to rotate. The grasping plate is driven to squeeze and fix the side part of the steel bar skeleton through the threaded fit between the first bidirectional lead screw and the grasping plate. The supporting claws support the bottom of the steel bar skeleton. The steel bar skeleton is grasped by multiple groups of grasping plates and supporting claws, ensuring the stability and convenience of grasping the steel bar skeleton, and having good practicability.

[0013] (2) In the present utility model, through the combined use of the mounting seat, the electric push rods, and the extrusion plate, after the steel bar skeleton is grasped by the grasping plates and the supporting claws, the electric push rods are used to drive the extrusion plate to move downward to squeeze the two ends of the steel bar skeleton, ensuring the stability and firmness of grasping and hoisting the steel bar skeleton. Brief Description of the Drawings

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

[0015] Figure 2 This is a schematic diagram of the structure of the hanging box of the present utility model;

[0016] Figure 3 This is a cross-sectional schematic diagram of the connecting seat of the present utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the adjustment box of the present utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the mounting seat of the present utility model.

[0019] Explanation of the reference numerals in the figures:

[0020] 1. Hanging box; 2. First bidirectional lead screw; 3. Grabbing plate; 4. Support claw; 5. First motor; 6. Spacing adjustment mechanism; 7. Extrusion mechanism; 8. Connecting seat; 9. Support sliding tube; 10. Support sliding rod; 11. Reinforcing rod; 12. Controller; 13. Suspension ring; 14. Adjustment box; 15. Second bidirectional lead screw; 16. Moving seat; 17. Adjusting rod; 18. Connecting block; 19. Second motor; 20. Mounting seat; 21. Electric push rod; 22. Extrusion plate; 23. Support connection mechanism. Detailed Description of the Preferred Embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "sheathed / connected", "connection", etc. should be understood in a broad sense. For example, "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0024] Embodiment:

[0025] Please refer to Figures 1-5 , a hoisting mechanical claw for the steel bar framework of a precast box girder, which includes a plurality of hanging boxes 1. The inner cavities of the plurality of hanging boxes 1 are respectively rotatably connected with first bidirectional lead screws 2. The outer sides of both ends of the plurality of first bidirectional lead screws 2 are respectively threadedly sleeved with grasping plates 3. The bottom ends of the grasping plates 3 all extend to the bottom of the hanging boxes 1 and are fixedly connected with supporting claws 4. A first motor 5 is fixedly installed at the end of the hanging box 1, and the output shaft of the first motor 5 is connected to the end of the first bidirectional lead screw 2. An extrusion mechanism 7 is arranged on the outer sides of two of the hanging boxes 1. The top surfaces of the plurality of hanging boxes 1 are respectively fixedly connected with connecting seats 8. A plurality of support connection mechanisms 23 are respectively arranged between two adjacent connecting seats 8. The support connection mechanism 23 includes a support sliding tube 9 fixedly sleeved on the side of one connecting seat 8 and a support sliding rod 10 fixedly connected to the side of the other connecting seat 8. The support sliding rod 10 is slidably connected to the inner cavity of the support sliding tube 9. A spacing adjustment mechanism 6 is respectively arranged between two adjacent hanging boxes 1.

[0026] In this embodiment, the two adjacent connecting seats 8 and the two adjacent hanging boxes 1 are connected and supported through the support sliding tube 9 and the support sliding rod 10, ensuring the overall stability of the mechanical claw.

[0027] Specifically, please refer to Figure 1 and Figure 4 , the spacing adjustment mechanism 6 includes an adjustment box 14 fixedly connected to one side of a hanging box 1 and a connection block 18 fixedly connected to one side of the other hanging box 1. A second bidirectional lead screw 15 is rotatably connected to the inner cavity of the adjustment box 14. The two ends of the second bidirectional lead screw 15 are respectively threadedly sleeved with moving seats 16. The side parts of the two moving seats 16 are respectively rotatably connected with adjustment rods 17. The end parts of the two adjustment rods 17 are respectively connected to the connection block 18. A second motor 19 is fixedly installed at the end of the adjustment box 14, and the output shaft of the second motor 19 is connected to the end of the second bidirectional lead screw 15. The inner wall of the adjustment box 14 is in contact with the side surface of the moving seat 16.

[0028] In this embodiment, the inner wall of the adjustment box 14 is used to limit the moving seat 16, so that the moving seat 16 can only move along the axial direction of the second bidirectional lead screw 15.

[0029] Specifically, please refer to Figure 1 and Figure 5 , the squeezing mechanism 7 includes a mounting seat 20 fixedly connected to one side of the hanging box 1. A plurality of electric push rods 21 are fixedly mounted on the mounting seat 20. The output ends of the plurality of electric push rods 21 all extend to the bottom of the mounting seat 20 and are fixedly connected with a squeezing plate 22.

[0030] In this embodiment, the electric push rod 21 is used to drive the squeezing plate 22 to move up and down, and the squeezing plate 22 is used to squeeze and fix the grabbed steel bar skeleton.

[0031] Specifically, please refer to Figure 2 , two reinforcing rods 11 are fixedly sleeved in the inner cavity of the hanging box 1. The two reinforcing rods 11 are respectively movably sleeved with two grabbing plates 3, and the side surfaces of the grabbing plates 3 are attached to the inner wall of the hanging box 1.

[0032] In this embodiment, the reinforcing rod 11 is used to limit the grabbing plate 3, so that the grabbing plate 3 can only move along the axial direction of the first bidirectional lead screw 2.

[0033] Specifically, please refer to Figure 1 , a plurality of lifting rings 13 are fixedly connected to the top surfaces of the two connecting seats 8.

[0034] In this embodiment, the lifting rings 13 are connected to the steel wire ropes of the crane, so as to hoist the mechanical claw, and the mechanical claw is used to hoist the steel bar skeleton in the precast box girder.

[0035] Specifically, please refer to Figures 1 to 5 , a controller 12 is arranged on the top of one of the hanging boxes 1. The controller 12 is electrically connected to the first motor 5, the second motor 19 and the electric push rod 21 respectively.

[0036] In this embodiment, the controller 12 is used to control the first motor 5, the second motor 19 and the electric push rod 21.

[0037] Working principle: Connect the steel wire ropes on the crane through the lifting rings 13. At the same time, multiple steel wire ropes can be adjusted synchronously to stably lift the mechanical claw. When it is necessary to lift the steel bar skeleton, first start the second motor 19 to drive the second bidirectional lead screw 15 to rotate. Through the threaded fit between the second bidirectional lead screw 15 and the moving seat 16, drive the two moving seats 16 to approach or move away from each other. Use the moving seat 16 to drive the adjusting rod 17 to rotate, and use the adjusting rod 17 to adjust the distance between the connecting block 18 and the adjusting box 14, so as to adjust the distance between the two lifting boxes 1, and further adjust the overall length of the multiple lifting boxes 1 on the mechanical claw, so that the mechanical claw can grasp steel bar skeletons of different lengths. Then place the mechanical claw outside the steel bar skeleton, start multiple first motors 5 to drive multiple first bidirectional lead screws 2 to rotate, and use the threaded fit between the first bidirectional lead screw 2 and the grasping plate 3 to drive two opposite grasping plates 3 to approach each other, so that the supporting claws 4 at the bottom of the grasping plate 3 are inserted under the steel bar skeleton to lift the steel bar skeleton. Then start the electric push rod 21 to drive the pressing plate 22 to move downwards, so that the bottom surface of the pressing plate 22 is in contact with the top surfaces at both ends of the steel bar skeleton, and at the same time squeeze and fix both ends of the steel bar skeleton. Finally, use the mechanical claw to lift the steel bar skeleton, and that's it.

[0038] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A mechanical claw for hoisting a prefabricated box beam steel bar skeleton, characterized in that: The invention comprises a plurality of hanging boxes (1), wherein the inner cavities of the plurality of hanging boxes (1) are rotatably connected to first bidirectional screw rods (2), and the outer sides of the two ends of the plurality of first bidirectional screw rods (2) are respectively threadedly sleeved with grab plates (3), the bottom ends of the grab plates (3) extend to the bottom of the hanging boxes (1) and are fixedly connected to support claws (4), and the ends of the hanging boxes (1) are fixedly mounted with first motors (5), and the output shafts of the first motors (5) are connected to the ends of the first bidirectional screw rods (2), wherein the outer sides of two of the hanging boxes (1) are provided with extruders. Structure (7), the top surfaces of the plurality of hanging boxes (1) are respectively fixedly connected with connecting seats (8), a plurality of supporting connection mechanisms (23) are respectively arranged between two adjacent connecting seats (8), the supporting connection mechanisms (23) include a supporting slide tube (9) fixedly sleeved on the side of one connecting seat (8) and a supporting slide rod (10) fixedly connected to the side of another connecting seat (8), the supporting slide rod (10) is slidably connected to the inner cavity of the supporting slide tube (9), and a spacing adjustment mechanism (6) is respectively arranged between two adjacent hanging boxes (1).

2. The mechanical claw for hoisting the steel bar skeleton of a prefabricated box beam according to claim 1 is characterized in that: The spacing adjustment mechanism (6) comprises an adjustment box (14) fixedly connected to one side of a hanging box (1) and a connecting block (18) fixedly connected to one side of another hanging box (1); the inner cavity of the adjustment box (14) is rotatably connected to a second bidirectional screw rod (15); both ends of the second bidirectional screw rod (15) are respectively threadedly sleeved with a moving seat (16); the sides of the two moving seats (16) are respectively rotatably connected to adjustment rods (17); the ends of the two adjustment rods (17) are respectively connected to the connecting block (18); a second motor (19) is fixedly installed at the end of the adjustment box (14); the output shaft of the second motor (19) is connected to the end of the second bidirectional screw rod (15); the inner wall of the adjustment box (14) and the side of the moving seat (16) are in contact with each other.

3. The mechanical claw for hoisting the steel bar skeleton of a prefabricated box beam according to claim 2 is characterized in that: The squeezing mechanism (7) comprises a mounting seat (20) fixedly connected to one side of the hanging box (1), a plurality of electric push rods (21) being fixedly mounted on the mounting seat (20), and output ends of the plurality of electric push rods (21) all extend to the bottom of the mounting seat (20) and are fixedly connected to a squeezing plate (22).

4. The mechanical claw for hoisting the steel bar skeleton of a prefabricated box beam according to claim 1 is characterized in that: Two reinforcing rods (11) are fixedly sleeved in the inner cavity of the hanging box (1), and the two reinforcing rods (11) are movably sleeved with two grab plates (3) respectively, and the side surfaces of the grab plates (3) are in contact with the inner wall of the hanging box (1).

5. The mechanical claw for hoisting the steel bar skeleton of a prefabricated box beam according to claim 1 is characterized in that: A plurality of lifting rings (13) are fixedly connected to the top surfaces of the two connecting seats (8).

6. The mechanical claw for hoisting the steel bar skeleton of a prefabricated box beam according to claim 3 is characterized by: A controller (12) is provided on the top of one of the hanging boxes (1), and the controller (12) is electrically connected to the first motor (5), the second motor (19) and the electric push rod (21) respectively.

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