Lifting appliance for bridge construction

Abstract

The utility model discloses a lifting appliance for bridge construction, which comprises an outer cylinder and an inner column, the inner column is arranged in the outer cylinder, a lifting rod is fixedly mounted on the bottom surface of the inner column, and a lifting hook is integrally mounted on the bottom surface of the lifting rod. The lifting hook has the beneficial effects that the spring, the top cylinder, the locking plate and the elastic sheet are adopted, in a non-lifting state, the lifting hook is not stressed, the spring pulls the inner column to move upwards, then the lifting rod and the lifting hook are driven to move upwards, the bottom opening of the top cylinder pushes the locking plate to turn downwards along the hinge seat, the elastic sheet is stressed, and the lifting hook is opened, so that a worker can conveniently hang a heavy object; when a heavy object is hoisted after the heavy object is hung, the lifting hook is subjected to vertical downward pulling force, the contraction elastic force of the spring is overcome, the outer barrel moves upwards, the spring is lengthened, the outer barrel moves upwards to drive the top barrel to move upwards, the elastic piece rebounds, the locking piece is pushed to rebound, the opening of the lifting hook is blocked, closing is completed, then the lifting hook is automatically opened and closed, and the trouble of using an electric tool is omitted; the structure is simpler, and the use is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, and more specifically, to a lifting device for bridge construction. Background Technology

[0002] Currently, lifting equipment is widely used in bridge construction to lift heavy objects in conjunction with cranes. It is widely used in the hoisting of precast bridge sections. The lifting equipment is the connection structure between the crane's steel cable and the lifting ring of the heavy object. It bears a large amount of gravity load and ensures the safe and efficient execution of bridge construction tasks.

[0003] A search revealed application number CN202410586269.6, entitled "A Lifting Grip for Bridge Construction." This application addresses the issue that existing lifting slings are diverse, requiring manual assistance for hooking and unhooking, and lack automatic hooking and unhooking functions. Furthermore, some emerging automatic hooks only achieve automatic hooking or unhooking and are limited to lifting objects with rigid or flexible rings. The proposed solution uses a power mechanism to control a magnetic field generator, generating magnetic force during hooking to attract the lifting ring to the bottom of the sling's outer shell. Then, the hook mechanism rotates to hook the lifting ring from the bottom of the sling's outer shell. Subsequently, the steel cable retraction creates a closed structure between the hook and the inclined surface of the sling's outer shell, while a connecting mechanism locks the hook mechanism, securing the sling's outer shell and hook mechanism, thus completing the automatic hooking process. During unhooking, the power mechanism... The force mechanism controls the magnetic field generator to generate magnetic force, attracting the weight's lifting ring to the bottom of the lifting device's housing. The connecting mechanism controls the latch mechanism to be in the unlocked state, allowing the hook mechanism to rotate relative to the lifting device's housing. The power mechanism controls the hook mechanism to rotate, causing the hook mechanism to disengage from the weight's lifting ring. Finally, the power mechanism controls the magnetic field generator to lose its magnetic force, and the weight's lifting ring falls off the lifting device's housing, completing the automatic unhooking. However, this application relies on electrical equipment such as a magnetic field generator and a motor to complete the automatic closing and unlocking. It also requires the simultaneous use of a power supply cable, and the length of the power supply cable must match the steel cable used for lifting. Furthermore, it is necessary to constantly pay attention to the issues of mutual entanglement and wear, and to install a power supply cable winding device simultaneously. This results in a very complex overall structure, and it still requires manual hooking, which is not very convenient. Further improvements can be made.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a lifting device for bridge construction, which has the advantages of simple structure and convenient use, thereby solving the problems mentioned in the background technology.

[0007] (II) Technical Solution

[0008] To achieve the advantages of simple structure and ease of use mentioned above, the specific technical solution adopted by this utility model is as follows:

[0009] A lifting device for bridge construction includes an outer cylinder and an inner column. The inner column is located inside the outer cylinder, and a lifting rod is fixedly installed on the bottom surface of the inner column. A hook is integrally installed on the bottom surface of the lifting rod. A top cylinder is fixedly installed on the bottom surface of the outer cylinder, and a connecting seat is fixedly installed on the top surface of the outer cylinder. A locking plate is hinged to the bottom surface of the lifting rod inside the hook via a hinged seat. A spring is connected between the locking plate and the top of the hook, and the outer surface of the locking plate slides against the bottom opening of the top cylinder. A rotating plate is rotatably connected to the top surface of the inner column, and a spring is installed between the rotating plate and the inner top surface of the outer cylinder.

[0010] Furthermore, the inner column sidewall and bottom surface are provided with ball grooves, and steel balls are rolled inside the ball grooves, and the steel balls roll against the inner wall of the outer cylinder.

[0011] Furthermore, the two ends of the spring are fixedly connected to the rotating plate and the inner top surface of the outer cylinder, respectively, and the spring force is greater than the spring force of the sheet.

[0012] Furthermore, the top surface of the inner column is provided with a rotating groove, and a rotating seat is rotatably connected inside the rotating groove. The top surface of the rotating seat is fixedly connected to the bottom surface of the rotating plate. The rotating groove, rotating seat, inner column, rotating plate, and outer cylinder are arranged coaxially, and the vertical cross-sectional shape of the rotating groove and the rotating seat is convex.

[0013] Furthermore, a bottom hole is provided on the bottom surface of the outer cylinder, and the lifting rod passes through the bottom hole.

[0014] Furthermore, the two sides of the spring are fixedly connected to the surfaces of the locking plate and the hook, respectively, and the elastic force of the spring is greater than the weight of the locking plate.

[0015] Furthermore, the surface of the connecting seat is provided with rope holes, and the rope holes are polished.

[0016] Furthermore, the steel balls and ball grooves are evenly arranged in multiple sets, and the diameter of the steel balls is larger than the opening diameter of the ball grooves, while the radius of the steel balls is smaller than the radius of the ball grooves.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides a lifting tool for bridge construction, which has the following beneficial effects:

[0019] (1) This utility model adopts a spring, a top cylinder, a locking plate, and a spring plate. In the non-hoisting state, the hook is not under force. The spring pulls the inner column to move upward, which in turn drives the lifting rod and hook to move upward. The bottom of the top cylinder pushes the locking plate to flip downward along the hinge seat. The spring plate is under force and opens the hook, making it convenient for workers to hang heavy objects. When the heavy object is hoisted, the hook is subjected to a vertical downward pull force, which overcomes the spring contraction force. The outer cylinder moves upward, the spring is stretched, and the upward movement of the outer cylinder drives the top cylinder to move upward. The spring plate rebounds and pushes the locking plate to rebound, sealing the hook opening and completing the closure. This completes the automatic opening and closing of the hook, eliminating the trouble of using power tools. The structure is simpler and the use is more convenient.

[0020] (2) This utility model adopts an inner column, with steel balls rollingly connected to the edge and bottom surface of the inner column. At the same time, a rotating plate is rotatably connected to the top surface of the inner column, so that the inner column can rotate freely inside the outer cylinder, which facilitates the free rotation of the lifting rod and hook. Meanwhile, when the hook rotates, the locking plate always slides against the bottom opening of the top cylinder, which does not affect the normal use of the locking plate. The rotating plate will not rotate with the rotation of the inner column, which improves the stability of the spring installation. This device eliminates the use of a rotating shaft while ensuring the rotation performance of the hook. The rotation friction is reduced by the setting of steel balls, which improves the rotation performance and overall lifting capacity. The structure is simpler and the use and maintenance are more convenient. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the internal structure of a lifting device for bridge construction proposed in this utility model when lifting heavy objects;

[0023] Figure 2 This is a schematic diagram of the internal structure of a lifting device for bridge construction in a non-lifting state, as proposed in this utility model.

[0024] Figure 3 This is a schematic diagram of the external structure of a lifting device for bridge construction proposed in this utility model;

[0025] Figure 4 This is a schematic diagram of the connection between the hook and the inner column proposed in this utility model.

[0026] In the picture:

[0027] 1. Outer cylinder; 2. Inner column; 3. Hanging rod; 4. Bottom hole; 5. Hook; 6. Hinge seat; 7. Spring; 8. Locking plate; 9. Rope hole; 10. Top cylinder; 11. Ball groove; 12. Steel ball; 13. Rotating plate; 14. Rotating groove; 15. Rotating seat; 16. Spring; 17. Connecting seat. Detailed Implementation

[0028] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0029] According to an embodiment of the present invention, a lifting device for bridge construction is provided.

[0030] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-4 As shown, a lifting device for bridge construction according to an embodiment of the present invention includes an outer cylinder 1 and an inner column 2. The inner column 2 is arranged inside the outer cylinder 1. Both the outer cylinder 1 and the inner column 2 are made of steel, and a lifting rod 3 is fixedly installed on the bottom surface of the inner column 2. The inner column 2 and the lifting rod 3 are arranged coaxially and welded together. A hook 5 is integrally installed on the bottom surface of the lifting rod 3. A top cylinder 10 is fixedly installed on the bottom surface of the outer cylinder 1. The top cylinder 10 is an inverted trapezoidal cylinder, and a connecting seat 17 is fixedly installed on the top surface of the outer cylinder 1. A locking piece 8 is hinged to the bottom surface of the lifting rod 3 inside the hook 5 through a hinge seat 6. A spring piece 7 is connected between the locking piece 8 and the top of the hook 5, and the outer surface of the locking piece 8 slides against the bottom opening of the top cylinder 10. A rotating plate 13 is rotatably connected to the top surface of the inner column 2. A spring 16 is installed between the moving plate 13 and the inner top surface of the outer cylinder 1. In the non-hoisting state, the hook 5 is not under force. The spring 16 pulls the inner column 2 upward, which in turn drives the lifting rod 3 and the hook 5 upward. The bottom opening of the top cylinder 10 pushes the locking plate 8 to flip downward along the hinge seat 6. The spring plate 7 is under force, opening the hook 5, which is convenient for workers to hang heavy objects. When the heavy object is hoisted, the hook 5 is subjected to a vertical downward pull, which overcomes the contraction force of the spring 16. The outer cylinder 1 moves upward, the spring 16 stretches, and the upward movement of the outer cylinder 1 drives the top cylinder 10 to move upward. The spring plate 7 rebounds, pushing the locking plate 8 to rebound, sealing the opening of the hook 5, thus completing the closure. This completes the automatic opening and closing of the hook 5, eliminating the trouble of using power tools, making the structure simpler and more convenient to use.

[0031] In one embodiment, the inner column 2 has ball grooves 11 on its sidewalls and bottom surface, and steel balls 12 are rolled inside the ball grooves 11. The steel balls 12 roll against the inner wall of the outer cylinder 1, reducing the friction when the inner column 2 rotates by rolling the steel balls 12. The top surface of the inner column 2 has a rotating groove 14, and a rotating seat 15 is rotatably connected inside the rotating groove 14. The top surface of the rotating seat 15 is fixedly connected to the bottom surface of the rotating plate 13. The rotating groove 14, rotating seat 15, inner column 2, rotating plate 13, and outer cylinder 1 are arranged coaxially. The vertical cross-sectional shape of the rotating groove 14 and rotating seat 15 is convex to prevent the rotating seat 15 and rotating groove 14 from separating. 2. Steel balls 12 are rolledly connected to the edges and bottom surface of the inner column 2. At the same time, a rotating plate 13 is rotatably connected to the top surface of the inner column 2, so that the inner column 2 can rotate freely inside the outer cylinder 1, which facilitates the free rotation of the lifting rod 3 and the hook 5. Meanwhile, when the hook 5 rotates, the locking plate 8 always slides against the bottom opening of the top cylinder 10, which does not affect the normal use of the locking plate 8. The rotating plate 13 will not rotate with the rotation of the inner column 2, which improves the stability of the spring 16 installation. This device eliminates the use of a rotating shaft while ensuring the rotation performance of the hook 5. The setting of steel balls 12 reduces rotational friction, improves rotation performance and overall lifting capacity, and makes the structure simpler and easier to use and maintain.

[0032] In one embodiment, the two ends of the spring 16 are fixedly connected to the rotating plate 13 and the inner top surface of the outer cylinder 1, respectively. The elastic force of the spring 16 is greater than that of the spring piece 7, and the elastic force of the spring 16 is greater than the sum of the maximum elastic forces of the inner column 2, the hanging rod 3, the hook 5, the locking piece 8 and the spring piece 7, ensuring that the spring 16 can pull the inner column 2 upward.

[0033] In one embodiment, the bottom surface of the outer cylinder 1 is provided with a bottom hole 4, through which the lifting rod 3 passes to facilitate the up and down movement of the lifting rod 3.

[0034] In one embodiment, the two sides of the spring piece 7 are fixedly connected to the surfaces of the locking piece 8 and the hook 5, respectively, and the elastic force of the spring piece 7 is greater than the weight of the locking piece 8, ensuring that the spring piece 7 can push the locking piece 8 to rotate upward to close the hook 5.

[0035] In one embodiment, the surface of the connector 17 is provided with a rope hole 9 for connecting a hoisting rope, and the rope hole 9 is polished to reduce wear on the rope.

[0036] In one embodiment, multiple sets of steel balls 12 and ball grooves 11 are evenly arranged, and the diameter of the steel ball 12 is larger than the opening diameter of the ball groove 11, and the radius of the steel ball 12 is smaller than the radius of the ball groove 11, so as to prevent the steel ball 12 from separating from the ball groove 11 and to ensure that the steel ball 12 can roll in the ball groove 11.

[0037] Working principle:

[0038] In the non-lifting state, hook 5 is not under force. Spring 16 pulls the inner column 2 upward, which in turn moves the boom 3 and hook 5 upward. The bottom of the top cylinder 10 pushes the locking plate 8 to flip downward along the hinge seat 6. The spring plate 7 is stressed, opening hook 5, making it convenient for workers to hang heavy objects. When lifting heavy objects, hook 5 is subjected to a vertical downward pull, which overcomes the contraction force of spring 16. The outer cylinder 1 moves upward, spring 16 stretches, and the upward movement of the outer cylinder 1 drives the top cylinder 10 upward. The spring plate 7 rebounds, pushing the locking plate 8 to rebound, sealing the opening of hook 5, thus completing the closure. This completes the automatic opening and closing of hook 5, eliminating the need for power tools, making the structure simpler and more convenient to use. Meanwhile, steel balls 12 are rolledly connected to the edge and bottom surface of the inner column 2, and a rotating plate 13 is rotatably connected to the top surface of the inner column 2, so that the inner column 2 can rotate freely inside the outer cylinder 1, which facilitates the free rotation of the lifting rod 3 and the hook 5. At the same time, when the hook 5 rotates, the locking plate 8 always slides against the bottom opening of the top cylinder 10, which does not affect the normal use of the locking plate 8. The rotating plate 13 will not rotate with the rotation of the inner column 2, which improves the stability of the spring 16 installation. This device eliminates the use of a rotating shaft while ensuring the rotation performance of the hook 5. The setting of steel balls 12 reduces rotational friction, improves rotation performance and overall lifting capacity, and makes the structure simpler and easier to use and maintain.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lifting device for bridge construction, characterized in that, The device includes an outer cylinder (1) and an inner column (2). The inner column (2) is provided inside the outer cylinder (1), and a lifting rod (3) is fixedly installed on the bottom surface of the inner column (2). A hook (5) is integrally installed on the bottom surface of the lifting rod (3). A top cylinder (10) is fixedly installed on the bottom surface of the outer cylinder (1), and a connecting seat (17) is fixedly installed on the top surface of the outer cylinder (1). The bottom surface of the lifting rod (3) is located inside the hook (5) and a locking piece (8) is hinged to it through a hinge seat (6). A spring piece (7) is connected between the locking piece (8) and the top of the hook (5). The outer surface of the locking piece (8) slides against the bottom opening of the top cylinder (10). A rotating plate (13) is rotatably connected to the top surface of the inner column (2), and a spring (16) is installed between the rotating plate (13) and the inner top surface of the outer cylinder (1).

2. The lifting device for bridge construction according to claim 1, characterized in that, The inner column (2) has ball grooves (11) on its side wall and bottom surface, and steel balls (12) are rolled inside the ball grooves (11), and the steel balls (12) roll against the inner wall of the outer cylinder (1).

3. The lifting device for bridge construction according to claim 1, characterized in that, The two ends of the spring (16) are fixedly connected to the rotating plate (13) and the inner top surface of the outer cylinder (1), respectively, and the elastic force of the spring (16) is greater than that of the spring sheet (7).

4. A lifting device for bridge construction according to claim 1, characterized in that, The inner column (2) has a rotating groove (14) on its top surface, and a rotating seat (15) is rotatably connected inside the rotating groove (14). The top surface of the rotating seat (15) is fixedly connected to the bottom surface of the rotating plate (13). The rotating groove (14), rotating seat (15), inner column (2), rotating plate (13), and outer cylinder (1) are arranged coaxially, and the vertical cross-sectional shape of the rotating groove (14) and rotating seat (15) is convex.

5. A lifting device for bridge construction according to claim 1, characterized in that, The bottom surface of the outer cylinder (1) is provided with a bottom hole (4), and the lifting rod (3) passes through the bottom hole (4).

6. A lifting device for bridge construction according to claim 1, characterized in that, The two sides of the spring piece (7) are fixedly connected to the surfaces of the locking piece (8) and the hook (5) respectively, and the elastic force of the spring piece (7) is greater than the weight of the locking piece (8).

7. A lifting device for bridge construction according to claim 1, characterized in that, The surface of the connecting seat (17) is provided with a rope hole (9), and the rope hole (9) is polished.

8. A lifting device for bridge construction according to claim 2, characterized in that, The steel balls (12) and the ball grooves (11) are evenly arranged in multiple sets, and the diameter of the steel balls (12) is larger than the opening diameter of the ball grooves (11), and the radius of the steel balls (12) is smaller than the radius of the ball grooves (11).

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