A vibration damping device for bridge cranes

Abstract

This invention discloses a shock absorption device for a bridge crane, relating to the field of bridge crane technology. It solves the technical problem of the lack of a shock absorption device between the main beam and the two moving end beams of a bridge crane, leading to easy damage to crane components due to impact during lifting. The device includes two hollow buffer beams located below the main beam and fixedly connected to the upper surface of the traveling beam near its end; and multiple sets of guide members located between the main beam and the buffer beams. Each set of guide members includes two guide posts and side push grooves on the opposing sides of the two guide posts. The top of the guide posts is fixedly connected to the bottom of the main beam, and the guide posts slide through the buffer beams. This invention facilitates multiple buffering of the impact force generated when a bridge crane lifts goods, resulting in good shock absorption between the main beam and the traveling beam, thus preventing damage to various crane components due to impact.

Description

Technical Field

[0001] This invention relates to the field of bridge crane technology, and more specifically to a bridge crane vibration damping device. Background Technology

[0002] Bridge cranes are important lifting equipment widely used in workshops, warehouses, and material yards for material handling. Their main structure resembles a bridge, supported at both ends by tall concrete pillars or metal supports. The bridge frame runs longitudinally along tracks laid on elevated supports on both sides, while the lifting trolley runs laterally along tracks on the bridge frame. This creates a rectangular working area, allowing the bridge crane to fully utilize the space beneath the bridge frame for material handling, avoiding obstruction from ground equipment.

[0003] Bridge cranes are mainly composed of a bridge frame, a trolley traveling mechanism, a hoisting mechanism, and a trolley traveling mechanism. The bridge frame bears the weight of the entire crane. The trolley traveling mechanism is responsible for the longitudinal movement of the bridge frame on the track. The hoisting mechanism realizes the vertical lifting and lowering of goods through components such as motors, reducers, drums, and wire ropes. The trolley traveling mechanism is responsible for the lateral movement of the crane trolley on the bridge frame.

[0004] In existing bridge cranes, the main beam and the moving end beams at both ends are mostly rigidly connected, lacking shock absorption devices. When cargo is suddenly lifted or lowered, it remains stationary, generating a downward pull. This pull is transmitted directly to the crane trolley via the lifting ropes, and then to the main beam and moving end beams. Because the main beam and moving end beams are rigidly connected, this impact force cannot be effectively absorbed or dispersed, resulting in a huge impact on the entire crane structure. Under such operating conditions for a long time, all components of the crane, including the moving end beams, main beam, crane trolley, and lifting ropes, will be subjected to continuous impact forces, leading to fatigue, deformation, and even damage to components. More seriously, when the crane is suddenly subjected to a downward pull from a cargo, the lack of an effective shock absorption mechanism can directly damage crane components and even cause safety accidents. Summary of the Invention

[0005] The purpose of this invention is to provide a shock absorption device for bridge cranes, which solves the problem that the lack of a shock absorption device between the main beam and the moving end beams at both ends of the bridge crane makes the crane components susceptible to damage due to impact during the lifting process.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A vibration damping device for a bridge crane, comprising:

[0008] Two hollow buffer beams are located below the main beam and are fixedly connected to the upper surface of the traveling beam near its end.

[0009] Multiple sets of guide components are provided, which are located between the main beam and the buffer beam. Each set of guide components includes two guide posts and a side push groove opened on the opposite side of the two guide posts. The top of the guide post is fixedly connected to the bottom of the main beam, and the guide post slides through the buffer beam. The bottom of the side push groove is set with an inclined structure.

[0010] A side-push buffer is located inside a buffer beam and between two guide posts. The side-push buffer includes two compression blocks, two first pistons, and a first spring. The two first pistons are slidably disposed inside the buffer beam. The first spring is installed between the two first pistons. The compression blocks are connected to the side of the first piston away from the first spring, and the side of the compression blocks away from the first piston is in contact with the bottom of the side-push groove.

[0011] A pneumatic buffer mechanism includes a cylinder, a second piston, and a piston rod. The cylinder is installed on top of the buffer beam and is connected to the buffer beam. The second piston is installed inside the cylinder, and the piston rod is installed on the second piston. The top end of the piston rod passes through the cylinder and is connected to the main beam.

[0012] As a further aspect of the present invention: an air chamber is formed between the two first pistons, and an air vent is provided at the bottom of the cylinder, and the air vent is connected to the air chamber.

[0013] As a further aspect of the present invention: a lower reinforcing beam is fixedly connected between the opposing sidewalls of the two buffer beams near their ends, and an upper reinforcing beam is fixedly connected between the opposing sidewalls of the main beam near its ends, and a magnetic buffer mechanism is installed between the upper and lower reinforcing beams.

[0014] As a further aspect of the present invention: the magnetic buffer mechanism includes a lower magnet fixedly installed at the center of the top of the lower reinforcing beam, and an upper magnet fixedly installed at the center of the bottom of the upper reinforcing beam. The upper magnet is located directly above the lower magnet, and the magnetic poles of the upper magnet and the lower magnet are the same on their opposite sides.

[0015] As a further aspect of the present invention: the main beam is used to support the lifting trolley, and a slide rail for the lifting trolley to travel is installed on the top of the main beam.

[0016] As a further aspect of the present invention, the depth of the bottom of the side push groove gradually increases from top to bottom.

[0017] As a further embodiment of the present invention: a limiting plate is fixedly connected to the bottom end of the guide post, the cross-section of the limiting plate is larger than the cross-section of the guide post, and the upper surface of the limiting plate is in contact with the bottom of the buffer beam. Guide holes corresponding to the guide post are opened at the top and bottom of the buffer beam, and the guide post is slidably connected to the guide holes.

[0018] As a further aspect of the present invention: a second spring is fixedly installed on the top of the cylinder, the second spring is sleeved on the piston rod, and the top end of the second spring is connected to the bottom of the main beam; a third spring is installed on the lower surface inside the cylinder, and the top end of the third spring is connected to the bottom of the second piston.

[0019] The beneficial effects of this invention are:

[0020] 1. In this invention, multiple sets of guide members are used. Each guide member consists of two guide columns and a side push groove. The top of the guide column is fixedly connected to the bottom of the main beam, and the bottom of the side push groove is inclined. When the lifting of the goods generates an impact force, the main beam will drive the guide column to slide down along the buffer beam. The side push groove on the side wall of the guide column facilitates the two extrusion blocks to move closer to each other when the guide column slides down. This pushes the two first pistons to slide towards each other along the inner wall of the buffer beam and compress the first spring, thereby facilitating the initial buffering and shock absorption of the impact force.

[0021] 2. In this invention, by setting up a pneumatic buffer mechanism, the air in the buffer beam is squeezed into the cylinder when the two first pistons slide towards each other, thereby generating an upward thrust on the second piston. When the main beam moves downward under the impact force, it will drive the piston rod to move synchronously, thereby applying a downward thrust to the second piston. This allows the compressed air to be used to further buffer the impact force, effectively improving the buffering and shock absorption effect of the bridge crane. Attached Figure Description

[0022] The invention will now be further described with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the structure of a bridge crane vibration damping device according to the present invention;

[0024] Figure 2 This is a cross-sectional structural schematic diagram of the connection between the main beam and the buffer beam in a bridge crane shock absorption device of the present invention.

[0025] Figure 3 This is a schematic diagram of the guide component in a bridge crane vibration damping device according to the present invention;

[0026] Figure 4 This is a schematic diagram of the connection between the buffer beam and the lower reinforcing beam in a bridge crane shock absorption device according to the present invention;

[0027] Figure 5 This is a side view of the shock absorption device for a bridge crane according to the present invention.

[0028] Figure 6 yes Figure 2 Enlarged view of section A.

[0029] In the diagram: 1. Buffer beam; 2. Main beam; 3. Traveling beam; 4. Guide component; 401. Guide column; 402. Side push groove; 5. Side push buffer component; 501. Extrusion block; 502. First piston; 503. First spring; 6. Cylinder; 7. Second piston; 8. Piston rod; 9. Air chamber; 10. Lower reinforcing beam; 11. Upper reinforcing beam; 12. Lower magnet; 13. Upper magnet; 14. Lifting trolley; 15. Slide rail; 16. Limiting plate; 17. Guide hole; 18. Second spring; 19. Third spring. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-6 As shown, the present invention is a vibration damping device for a bridge crane, comprising two hollow buffer beams 1, multiple sets of guide members 4, side-pushing buffer members 5, and a pneumatic buffer mechanism. The buffer beams 1 are located below the main beam 2, which is used to support the lifting trolley 14. The top of the main beam 2 is equipped with a slide rail 15 for the lifting trolley 14 to travel. The buffer beams 1 are fixedly connected to the upper surface of the traveling beam 3 near the end. The guide members 4 are located between the main beam 2 and the buffer beams 1, so that when the lifting cargo generates an impact force, the main beam 2 can drive the guide members 4 to slide down along the buffer beams 1, so that when the main beam 2 is subjected to the impact force generated by the lifting cargo, it can slide smoothly along the buffer beams 1, reducing the direct vibration of the main beam 2.

[0032] Each set of guide components 4 includes two guide posts 401 and side push grooves 402 opened on the opposite sides of the two guide posts 401. The top of the guide post 401 is fixedly connected to the bottom of the main beam 2, and the guide post 401 is slidably installed through the buffer beam 1. The bottom of the guide post 401 is fixedly connected to a limiting plate 16 to ensure that the guide post 401 will not detach from the buffer beam 1. The cross-section of the limiting plate 16 is larger than the cross-section of the guide post 401, and the upper surface of the limiting plate 16 is in contact with the bottom of the buffer beam 1. The top and bottom of the buffer beam 1 are provided with guide holes 17 corresponding to the guide posts 401, and the guide posts 401 are slidably connected to the guide holes 17. The bottom of the side push groove 402 is set with an inclined structure, and the depth of the bottom of the side push groove 402 gradually increases from top to bottom.

[0033] The side-push buffer 5 is located inside the buffer beam 1 and between the two guide posts 401. The side-push buffer 5 includes two extrusion blocks 501, two first pistons 502 and a first spring 503. The side-push buffer 5 effectively absorbs and disperses the impact force through the cooperation of the extrusion blocks 501 and the side-push groove 402. When the guide post 401 slides down, the inclined structure of the side-push groove 402 pushes the extrusion blocks 501 to move, which in turn drives the first pistons 502 to slide in the buffer beam 1 and compress air. This not only improves the shock absorption effect, but also makes the shock absorption process more stable and continuous.

[0034] Two first pistons 502 are slidably disposed within the buffer beam 1 to facilitate the compression of air when the two first pistons 502 slide toward each other. A first spring 503 is installed between the two first pistons 502 to provide a buffering and shock-absorbing effect. An extrusion block 501 is connected to the side of the first piston 502 away from the first spring 503, and the side of the extrusion block 501 away from the first piston 502 is in contact with the bottom of the side push groove 402, so that the extrusion block 501 can be pushed to move by the side push groove 402 when the guide column 401 slides down.

[0035] The pneumatic buffer mechanism includes a cylinder 6, a second piston 7, and a piston rod 8. The cylinder 6 is installed on top of the buffer beam 1 and is connected to the buffer beam 1. The second piston 7 is installed inside the cylinder 6, and the piston rod 8 is installed on the second piston 7. The top end of the piston rod 8 passes through the cylinder 6 and is connected to the main beam 2, so that they can work together to absorb and disperse the impact force. When the main beam 2 is impacted, the piston rod 8 will be squeezed, thereby pushing the second piston 7 to move inside the cylinder 6. During this process, the change in air pressure will also play a buffering role, further reducing the impact of the impact force on the crane structure.

[0036] An air chamber 9 is formed between the two first pistons 502. An air vent is provided at the bottom of the cylinder 6 and is connected to the air chamber 9, so that the two first pistons 502 can compress the air in the air chamber 9 into the cylinder 6. A second spring 18 is fixedly installed at the top of the cylinder 6. The second spring 18 is sleeved on the piston rod 8 for shock absorption and buffering. The top of the second spring 18 is connected to the bottom of the main beam 2. A third spring 19 is installed on the lower surface inside the cylinder 6. The top of the third spring 19 is connected to the bottom of the second piston 7. The second spring 18 and the third spring 19 can be used to further improve the buffering effect.

[0037] A lower reinforcing beam 10 is fixedly connected between the opposing sidewalls of the two buffer beams 1 near their ends to improve the overall structural stability of the buffer beams 1. An upper reinforcing beam 11 is fixedly connected between the opposing sidewalls of the main beam 2 near its ends to improve the structural stability of the main beam 2. A magnetic buffering mechanism is installed between the upper reinforcing beam 11 and the lower reinforcing beam 10 to facilitate the buffering of the impact force received by the main beam 2.

[0038] The magnetic buffer mechanism includes a lower magnet 12 fixedly installed at the top center of the lower reinforcing beam 10, and an upper magnet 13 fixedly installed at the bottom center of the upper reinforcing beam 11. The upper magnet 13 is located directly above the lower magnet 12, and the magnetic poles of the upper magnet 13 and the lower magnet 12 are the same on the opposite side, ensuring that the lower magnet 12 and the upper magnet 13 generate a mutual repulsive force. The repulsive force is used to further buffer the impact force, so that the bridge crane has multiple buffering and shock absorption effects.

[0039] The working principle of this invention is as follows: When the lifting trolley 14 lifts goods and generates an impact force, the main beam 2 will be pressed downward, thereby driving the guide column 401 to slide downward along the guide hole 17 on the buffer beam 1. During the downward movement of the guide column 401, the side push groove 402 of the inclined structure at the bottom of the groove can push the two extrusion blocks 501 in the buffer beam 1 closer to each other, and drive the two first pistons 502 to slide towards each other along the inner wall of the buffer beam 1 and compress the first spring 503, thereby damping and buffering the impact force. At the same time, when the main beam 2 is pressed downward, the piston rod 8 will push the second piston 7 to slide downward along the inside of the cylinder 6. During the downward movement, the second spring 18 and the third spring 19 will be compressed, thereby further... To further enhance the buffering effect, when the second piston 7 slides down, it will compress the air in the cylinder 6 into the air chamber 9, and when the two first pistons 502 slide towards each other, they will compress the air in the air chamber 9 into the cylinder 6. This makes it increasingly difficult for the first piston 502 and the second piston 8 to slide, thus effectively buffering the impact force. At the same time, when the main beam 2 is pressed down, it will drive the upper magnet 13 at the bottom of the upper reinforcing beam 11 to move closer to the lower magnet 12 at the top of the lower reinforcing beam 10. The repulsive force between the lower magnet 12 and the upper magnet 13 will further buffer the impact force, so that the bridge crane can achieve multiple buffers when it is impacted, thereby ensuring that the various components of the bridge crane are not easily damaged.

[0040] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A vibration damping device for a bridge crane, characterized in that, include: Two hollow buffer beams (1) are located below the main beam (2) and are fixedly connected to the upper surface of the walking beam (3) near the end. Multiple sets of guide members (4) are located between the main beam (2) and the buffer beam (1). Each set of guide members (4) includes two guide posts (401) and a side push groove (402) opened on the opposite side of the two guide posts (401). The top of the guide post (401) is fixedly connected to the bottom of the main beam (2), and the guide post (401) slides through the buffer beam (1). The bottom of the side push groove (402) is set as an inclined structure. Side-push buffer (5), the side-push buffer (5) is located inside the buffer beam (1) and between two guide posts (401). The side-push buffer (5) includes two compression blocks (501), two first pistons (502) and a first spring (503). The two first pistons (502) are slidably disposed inside the buffer beam (1). The first spring (503) is installed between the two first pistons (502). The compression block (501) is connected to the side of the first piston (502) away from the first spring (503), and the side of the compression block (501) away from the first piston (502) is in contact with the bottom of the side-push groove (402). The pneumatic buffer mechanism includes a cylinder (6), a second piston (7) and a piston rod (8). The cylinder (6) is installed on the top of the buffer beam (1) and is connected to the buffer beam (1). The second piston (7) is installed inside the cylinder (6). The piston rod (8) is installed on the second piston (7) and the top end of the piston rod (8) passes through the cylinder (6) and is connected to the main beam (2). A gas chamber (9) is formed between the two first pistons (502), and a vent is provided at the bottom of the cylinder (6), and the vent is connected to the gas chamber (9); The depth of the bottom of the side push groove (402) gradually increases from top to bottom.

2. The bridge crane vibration damping device according to claim 1, characterized in that, A lower reinforcing beam (10) is fixedly connected between the opposing sidewalls of the two buffer beams (1) near their ends, and an upper reinforcing beam (11) is fixedly connected between the opposing sidewalls of the main beam (2) near its ends. A magnetic buffer mechanism is installed between the upper reinforcing beam (11) and the lower reinforcing beam (10).

3. A bridge crane vibration damping device according to claim 2, characterized in that, The magnetic buffer mechanism includes a lower magnet (12) fixedly installed at the top center of the lower reinforcing beam (10), and an upper magnet (13) fixedly installed at the bottom center of the upper reinforcing beam (11). The upper magnet (13) is located directly above the lower magnet (12), and the magnetic poles of the upper magnet (13) and the lower magnet (12) are the same on the opposite side.

4. A bridge crane vibration damping device according to claim 1, characterized in that, The main beam (2) is used to support the lifting trolley (14), and the top of the main beam (2) is equipped with a slide rail (15) for the lifting trolley (14) to travel.

5. A bridge crane vibration damping device according to claim 1, characterized in that, The bottom end of the guide post (401) is fixedly connected to a limiting plate (16). The cross-section of the limiting plate (16) is larger than that of the guide post (401), and the upper surface of the limiting plate (16) is in contact with the bottom of the buffer beam (1). The top and bottom of the buffer beam (1) are provided with guide holes (17) corresponding to the guide post (401), and the guide post (401) and the guide holes (17) are slidably connected.

6. A bridge crane vibration damping device according to claim 1, characterized in that, A second spring (18) is fixedly installed on the top of the cylinder (6). The second spring (18) is sleeved on the piston rod (8), and the top of the second spring (18) is connected to the bottom of the main beam (2). A third spring (19) is installed on the lower surface inside the cylinder (6), and the top of the third spring (19) is connected to the bottom of the second piston (7).

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