A stabilizing gantry beam for a double-girder gantry crane

Abstract

This utility model discloses a stabilizing gantry beam for a double-girder gantry crane, belonging to the technical field of double-girder gantry cranes. The stabilizing gantry beam includes two main beams, with a first support slidably connected between the two main beams. A second support is slidably connected to the top surface of the first support, and a third support is slidably connected to the top surface of the second support. A top plate is provided above the first support, and multiple connecting rods are fixed to the top plate and the first support. A notch is opened on the top surface of the top plate, and a connecting plate is provided inside the notch. Multiple first pins and multiple second pins are also fixed to the top surface of the top plate. This utility model solves the problem that when the gantry beam and outriggers are mostly rigidly welded or directly bolted, the longitudinal impact force during trolley braking is directly transmitted to the connection node, and stress concentration easily occurs in the web plate at the node.

Description

Technical Field

[0001] This utility model belongs to the technical field of double-girder gantry cranes, and more specifically, it relates to a stable gantry beam for a double-girder gantry crane. Background Technology

[0002] The gantry beam of a double-girder gantry crane actually refers to the main beam structure. The equipment consists of two parallel main beams and rigid and flexible legs forming the gantry frame. The main beam is welded from steel profiles and steel plates, and is usually a truss triangular structure used to support the trolley running track and load. In existing double-girder gantry cranes, the gantry beam and legs are mostly rigidly welded or directly bolted. The longitudinal impact force during trolley braking is directly transmitted to the connection node, and stress concentration is prone to occur in the web at the node. Therefore, a stabilizing gantry beam for double-girder gantry cranes is proposed. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a stabilizing gantry beam for a double-beam gantry crane. By using buffer rods on the connecting plate to reduce the force transmitted to the two main beams, the force increases gradually and gently, rather than being an instantaneous impact. This reduces the impact on the welding or bolts between the gantry beam and the outriggers, lowering the risk of stress concentration. This addresses the problem mentioned in the background technology where the gantry beam and outriggers are mostly rigidly welded or directly bolted, causing the longitudinal impact force during trolley braking to be directly transmitted to the connection node, leading to stress concentration in the web at the node.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A stabilizing gantry beam for a double-girder gantry crane includes two main beams. A first support is slidably connected between the two main beams. A second support is slidably connected to the top surface of the first support. A third support is slidably connected to the top surface of the second support. A top plate is provided above the first support. Multiple connecting rods are fixed to the top plate and the first support. A notch is provided on the top surface of the top plate. A connecting plate is provided inside the notch. Multiple first pins are also fixed on the top surface of the connecting plate. Multiple second pins are also fixed on the top surface of the top plate. A buffer rod is rotatably connected between the second pin and the first pin. Two first limiting plates are fixed to one end of the buffer rod near the second pin. A connecting ring is also provided on the top surface of the top plate. Multiple sliding seats are slidably connected to the outside of the connecting ring. A handle is fixed to the outside of the connecting ring. A pin is inserted between the handle and the top plate. A second limiting plate is provided on the inside of the connecting ring. The outside of the second limiting plate is slidably connected to the outside of the two first limiting plates. A bevel is provided at one end of the second limiting plate.

[0005] As a preferred embodiment of this invention, the sliding direction of the second bracket is the same as that of the first bracket.

[0006] As a preferred embodiment of this invention, the sliding direction of the third support is perpendicular to the sliding direction of the second support.

[0007] As a preferred embodiment of this utility model, the bottom surface of the connecting plate is fixedly connected to the top surface of the third bracket.

[0008] As a preferred embodiment of this utility model, both first limiting plates are semi-circular in structure, and the circles of both first limiting plates coincide with the center of the second pin.

[0009] As a preferred embodiment of this utility model, the bottom surfaces of the plurality of sliding seats are all fixedly connected to the top surface of the top plate.

[0010] As a preferred embodiment of this utility model, the second limiting plate has an arc-shaped structure, and the center of the second limiting plate coincides with the center of the connecting ring.

[0011] This utility model provides a stable gantry beam for a double-beam gantry crane, which has the following beneficial effects: 1. The stabilizing girder of this double-girder gantry crane is designed so that when the trolley brakes, the impact force is reduced by the buffer rod on the connecting plate through the third support. This results in a gentler, gradual increase in the force transmitted to the two main beams, rather than an instantaneous impact. This reduces the impact on the welding or bolts between the girder and the outriggers, and lowers the risk of stress concentration.

[0012] 2. The stabilizing beam of this double-girder gantry crane requires the buffer rod to be replaced periodically. After removing the pin, push the connecting ring to rotate by the handle, so that the second limiting plate on the connecting ring moves out between the first limiting plates on the buffer rod, thereby quickly releasing the buffer rod from its fixation. Then, insert the two ends of the buffer rod into the second pin and the first pin respectively, and push the connecting ring back to its original position by the handle, so that the second limiting plate on the connecting ring inserts between the first limiting plates on the buffer rod, thereby quickly completing the fixation of the buffer rod. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the stabilizing gantry beam of a double-beam gantry crane according to the present invention.

[0014] Figure 2 This is a schematic diagram of the disassembled structure of the stabilizing gantry beam of a double-beam gantry crane according to the present invention.

[0015] Figure 3 This utility model relates to a stabilizing gantry beam for a double-girder gantry crane. Figure 2 Enlarged diagram of point A in the diagram.

[0016] Figure 4 This utility model relates to a stabilizing gantry beam for a double-girder gantry crane. Figure 3Enlarged diagram of point B in the image.

[0017] In the diagram: 1. Main beam; 2. First support; 3. Second support; 4. Third support; 5. Top plate; 6. Connecting rod; 7. Notch; 8. Connecting plate; 9. First pin; 10. Second pin; 11. Buffer rod; 12. First limiting plate; 13. Connecting ring; 14. Sliding seat; 15. Handle; 16. Pin; 17. Second limiting plate; 18. Bevel. Detailed Implementation

[0018] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0019] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Please see Figures 1 to 4This utility model provides a technical solution: a stable gantry beam for a double-girder gantry crane, comprising two main beams 1, a first support 2 slidably connected between the two main beams 1, a second support 3 slidably connected to the top surface of the first support 2, a third support 4 slidably connected to the top surface of the second support 3, a top plate 5 above the first support 2, multiple connecting rods 6 fixed to the top plate 5 and the first support 2, a notch 7 on the top surface of the top plate 5, a connecting plate 8 inside the notch 7, multiple first pins 9 fixed to the top surface of the connecting plate 8, multiple second pins 10 fixed to the top surface of the top plate 5, a buffer rod 11 rotatably connected between the second pins 10 and the first pins 9, two first limiting plates 12 fixed to one end of the buffer rod 11 near the second pins 10, a connecting ring 13 on the top surface of the top plate 5, and multiple sliding connecting rods 12 slidably connected to the outer side of the connecting ring 13. The connecting ring 13 is fixed to the outer side of the seat 14, and a handle 15 is fixed to the outer side of the connecting ring 13. A pin 16 is inserted between the handle 15 and the top plate 5. A second limiting plate 17 is provided on the inner side of the connecting ring 13. The outer side of the second limiting plate 17 is slidably connected to the outer side of the two first limiting plates 12. A bevel 18 is provided at one end of the second limiting plate 17. The sliding direction of the second bracket 3 is the same as the sliding direction of the first bracket 2. The sliding direction of the third bracket 4 is perpendicular to the sliding direction of the second bracket 3. The bottom surface of the connecting plate 8 is fixedly connected to the top surface of the third bracket 4. Both first limiting plates 12 are semi-circular in structure. The circles of both first limiting plates 12 coincide with the center of the second pin 10. The bottom surfaces of the multiple sliding seats 14 are fixedly connected to the top surface of the top plate 5. The second limiting plate 17 is arc-shaped. The center of the second limiting plate 17 coincides with the center of the connecting ring 13. The crane's electric hook is fixed to the third support 4. Since the sliding direction of the third support 4 is perpendicular to the sliding direction of the second support 3, the force transmitted from the electric hook to the third support 4 and the second support 3 can move in both directions. During this process, when the impact force of the trolley braking drives the connecting plate 8 through the third support 4, it is reduced by the buffer rod 11 on the connecting plate 8. This results in a gentler, gradual increase in force transmitted to the two main beams 1, rather than an instantaneous impact, reducing the impact on the welding or bolts of the gantry beam and outriggers, and lowering the risk of stress concentration. The buffer rod 11 needs to be replaced periodically. After removing the pin 16, the connecting rod 11 is pushed through the handle 15. The ring 13 rotates, causing the second limiting plate 17 on the connecting ring 13 to move out between the first limiting plate 12 on the buffer rod 11, thereby quickly releasing the buffer rod 11 from fixation. Then, the two ends of the buffer rod 11 are inserted into the second pin 10 and the first pin 9 respectively. The connecting ring 13 is pushed back to its original position by the handle 15, so that the second limiting plate 17 on the connecting ring 13 is inserted between the first limiting plate 12 on the buffer rod 11, thereby quickly completing the fixation of the buffer rod 11. Through the above process, the problem of the door beam and the outrigger being rigidly welded or directly fixed with bolts, where the longitudinal impact force during the braking of the trolley is directly transmitted to the connection node, and stress concentration easily occurs in the web plate at the node, is solved.

[0022] The specific usage and function of this embodiment: The electric hook of the crane of this utility model is fixed on the third support 4. Since the sliding direction of the third support 4 is perpendicular to the sliding direction of the second support 3, the force transmitted by the electric hook to the third support 4 and the second support 3 can move in both directions. During this process, when the impact force of the trolley braking drives the connecting plate 8 through the third support 4, it is reduced by the buffer rod 11 on the connecting plate 8, so that the force transmitted to the two main beams 1 increases more gently and gradually, rather than an instantaneous impact force, reducing the impact on the welding or bolts of the gantry beam and the support leg, and reducing the risk of stress concentration. The buffer rod 11 needs to be replaced periodically. After removing the pin 16, push the connecting ring 13 to rotate by the handle 15, so that the second limiting plate 17 on the connecting ring 13 moves out between the first limiting plate 12 on the buffer rod 11, thereby quickly releasing the buffer rod 11 from its fixation. Then, insert the two ends of the buffer rod 11 into the second pin 10 and the first pin 9 respectively, and push the connecting ring 13 back to its original position by the handle 15, so that the second limiting plate 17 on the connecting ring 13 is inserted between the first limiting plate 12 on the buffer rod 11, thereby quickly completing the fixation of the buffer rod 11.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A stabilizing gantry beam for a double-girder gantry crane, comprising two main beams (1), characterized in that: A first bracket (2) is slidably connected between the two main beams (1). A second bracket (3) is slidably connected to the top surface of the first bracket (2). A third bracket (4) is slidably connected to the top surface of the second bracket (3). A top plate (5) is provided above the first bracket (2). Multiple connecting rods (6) are fixed to the top plate (5) and the first bracket (2). A notch (7) is provided on the top surface of the top plate (5). A connecting plate (8) is provided inside the notch (7). Multiple first pins (9) are also fixed on the top surface of the connecting plate (8). Multiple second pins (10) are also fixed on the top surface of the top plate (5). The second pins (10) are connected to the first pins (9). A buffer rod (11) is rotatably connected. Two first limiting plates (12) are fixed at one end of the buffer rod (11) near the second pin (10). A connecting ring (13) is also provided on the top surface of the top plate (5). Multiple sliding seats (14) are slidably connected to the outside of the connecting ring (13). A handle (15) is also fixed to the outside of the connecting ring (13). A pin (16) is inserted between the handle (15) and the top plate (5). A second limiting plate (17) is opened on the inside of the connecting ring (13). The outside of the second limiting plate (17) is slidably connected to the outside of the two first limiting plates (12). A bevel (18) is opened at one end of the second limiting plate (17).

2. The stabilizing gantry beam of a double-girder gantry crane according to claim 1, characterized in that: The sliding direction of the second bracket (3) is the same as that of the first bracket (2).

3. The stabilizing gantry beam of a double-girder gantry crane according to claim 1, characterized in that: The sliding direction of the third support (4) is perpendicular to the sliding direction of the second support (3).

4. The stabilizing gantry beam of a double-girder gantry crane according to claim 1, characterized in that: The bottom surface of the connecting plate (8) is fixedly connected to the top surface of the third bracket (4).

5. The stabilizing gantry beam of a double-girder gantry crane according to claim 1, characterized in that: Both of the first limiting plates (12) are semi-circular in structure, and the circles of the two first limiting plates (12) coincide with the center of the second pin (10).

6. A stabilizing gantry beam for a double-girder gantry crane according to claim 1, characterized in that: The bottom surfaces of all of the sliding seats (14) are fixedly connected to the top surface of the top plate (5).

7. A stabilizing gantry beam for a double-girder gantry crane according to claim 1, characterized in that: The second limiting plate (17) has an arc-shaped structure, and the center of the second limiting plate (17) coincides with the center of the connecting ring (13).

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