Flexible damping mechanism for a travelling crane

Abstract

The utility model discloses a kind of flexible damping mechanism of travelling crane, belong to damping mechanism technical field, it includes: protective shell, protective shell top end fixed mounting limit shell, sliding pressure plate is slidably installed in limit shell, hydraulic damper is fixedly installed in protective shell, hydraulic damper output end is fixedly connected with sliding pressure plate bottom end, threaded block is screw-connected on the outer side of hydraulic damper, rotating plate is rotatably installed in the top end of threaded block, large spring is fixedly installed in the top end of rotating plate, large spring top end is fixedly connected with sliding pressure plate bottom end, fixed spring and support rod one are fixedly installed in the top end of sliding pressure plate, the utility model is cooperated by vertical hydraulic damper plus spring and other structures, improves stability, threaded block design allows to adjust damping parameter on site, without replacing parts, stress is dispersed by hierarchical buffer structure, prolongs the service life of single element, protective shell and limit shell protect internal element from dust, moisture erosion.

Description

Technical Field

[0001] This utility model relates to the field of shock absorption mechanism technology, and in particular to a flexible shock absorption mechanism for overhead cranes. Background Technology

[0002] This flexible vibration damping mechanism aims to effectively reduce vibrations caused by inertia, load changes, and track irregularities during the lifting, translation, and lowering of overhead cranes. This improves the crane's operational stability, safety, and service life, while minimizing the impact on surrounding structures and operators. Rubber springs with suitable stiffness and damping characteristics are selected and installed between the wheel axles and the frame of the crane's trolley and crane carriage, as well as at the connection points between the hook and the boom or winch mechanism. Air springs are installed as auxiliary elastic support elements. The air springs have variable stiffness, automatically adjusting their support force according to changes in the crane's load, further optimizing the vibration damping effect. By adjusting the air pressure within the air springs, their stiffness can be precisely controlled, allowing them to work in conjunction with the rubber springs under different operating conditions to achieve optimal vibration damping performance. Equipped with an air pressure sensor and an automatic pressure regulation system, the air pressure changes within the air springs are monitored in real time, and air is automatically replenished or released according to a preset algorithm to maintain a stable vibration damping effect. Simultaneously, safety valves and limit devices are installed to prevent damage to the air springs due to unexpected conditions (such as overload, excessively high or low air pressure).

[0003] Overhead cranes are widely used in industrial workshops, port loading and unloading, metallurgy and other industries. However, the following problems exist during their operation, caused by the start and stop of the hoisting mechanism, sudden load changes or uneven tracks, resulting in vehicle body swaying, structural fatigue and unstable cargo handling. Traditional vibration reduction technologies, such as rigid supports and rubber buffers, cannot effectively absorb multi-directional vibration energy and lack adaptive adjustment capabilities, making it difficult to adapt to complex working conditions. Therefore, we propose a flexible vibration reduction mechanism for overhead cranes to solve this problem. Utility Model Content

[0004] The purpose of this utility model is to provide a flexible shock absorption mechanism for overhead cranes to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A flexible vibration damping mechanism for a traveling crane includes: a protective outer shell; a limiting outer shell fixedly installed at the top of the protective outer shell; a sliding pressure plate slidably installed inside the limiting outer shell; a hydraulic damper fixedly installed inside the protective outer shell; the output end of the hydraulic damper fixedly connected to the bottom end of the sliding pressure plate; a threaded block threadedly connected to the outer side of the hydraulic damper; a rotating plate rotatably installed at the top of the threaded block; a large spring fixedly installed at the top of the rotating plate; the top of the large spring fixedly connected to the bottom end of the sliding pressure plate; a fixed spring and a support rod fixedly installed at the top of the sliding pressure plate; the fixed spring sleeved on the outer side of the support rod; and a sliding outer shell fixedly installed at the top of the fixed spring and the support rod, the sliding outer shell slidably installed outside the limiting outer shell.

[0007] Preferably, the outer side of the support rod is integrally formed with multiple connecting plates, and the bottom end of the connecting plates is fixedly installed with support rod two, support rod three and two limiting springs. The two limiting springs are respectively sleeved on the outer side of support rod two and support rod three, and the bottom ends of the two limiting springs are fixedly installed on the top of the protective shell. The protective shell is provided with sliding grooves that match support rod two and support rod three.

[0008] Preferably, a sliding plate three is fixedly installed at the bottom end of the second support rod, an outer limiting frame is fixedly installed at the bottom end of the third sliding plate, a small spring is fixedly installed inside the outer limiting frame, a push rod is fixedly installed at the bottom end of the small spring, the push rod is slidably installed inside the small spring, a second sliding plate is slidably installed inside the protective shell, a support spring is fixedly installed on one side of the second sliding plate, and one side of the push rod is movably abutting against one side of the second sliding plate.

[0009] Preferably, a sliding plate is fixedly installed at the bottom end of the support rod three, and a small damper and a connecting spring are fixedly installed at the bottom end of the sliding plate one. The connecting spring is sleeved on the outside of the small damper, and the sliding plate one is slidably installed inside the protective shell.

[0010] Preferably, a fixed base is fixedly installed on the outer side of the protective shell, and a limiting groove matching the protective shell is provided on the fixed base. A rubber pad is fixedly installed in the limiting groove, and the top end of the rubber pad is fixedly connected to the bottom end of the protective shell.

[0011] Preferably, both the protective housing and the limiting housing are provided with circular grooves that match the hydraulic damper, the bottom end of the rotating plate is integrally formed with a T-shaped ring, the T-shaped ring is rotatably mounted on the top of the threaded block, the threaded block is provided with a rotating groove that matches the T-shaped ring, and the limiting housing is provided with a sliding groove that matches the sliding pressure plate.

[0012] In this utility model, a flexible shock absorption mechanism for a crane is described. When the crane experiences a vertical impact, the sliding outer shell is first pressed down by force. The impact force is transmitted to the sliding pressure plate through support rod one. The hydraulic damper, as the core shock absorption element, directly consumes the impact energy through the flow resistance of hydraulic oil. The output end pushes the sliding pressure plate downward. The large spring is compressed synchronously with the hydraulic damper and absorbs part of the energy through elastic deformation. Its stiffness can be adjusted by rotating the threaded block. The rotating plate rises and falls with the threaded block, changing the preload of the large spring. In the secondary buffer stage, during the downward pressing of the sliding pressure plate, the connecting plate on the outside of support rod one drives support rod two and support rod three to move down synchronously. The sliding plate three compresses the small spring in the outer limiting frame. After the push rod is compressed, it slides obliquely, pushing against the sliding plate two to compress the support spring, forming a lateral energy dispersion.

[0013] In this utility model, a flexible shock absorption mechanism for a traveling crane converts vertical impact into horizontal displacement through the inclined surface design of the outer limiting frame and the push rod. The energy is further dissipated by the support spring, and the sliding plate compresses a small damper. The connecting spring assists in absorbing residual vibration, forming a double vertical buffer. The deformation energy of all buffer components is released in the following ways: the hydraulic damper achieves controllable attenuation of the damping force; the large spring, small spring, support spring, and connecting spring gradually stabilize through multiple rebounds; the rubber pad provides basic vibration isolation at the fixed base to prevent vibration from being transmitted to the crane body; after the impact disappears, each spring component pushes the sliding pressure plate, sliding shell, and other components back to their initial positions; the rotating threaded block can change the preload of the large spring to adapt to different working conditions and load requirements; the sliding groove of the limiting shell limits the stroke of the sliding pressure plate to prevent excessive compression and damage to components.

[0014] This utility model has a reasonable structural design. By combining vertical hydraulic damping with springs and other structures, stability is improved. The threaded block design allows for on-site adjustment of damping parameters without replacing parts. The graded buffer structure disperses stress and extends the service life of individual components. The protective shell and limiting shell protect the internal components from dust and moisture corrosion. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a flexible shock absorption mechanism for a crane proposed in this utility model;

[0016] Figure 2 This is a cross-sectional structural schematic diagram of a flexible shock absorption mechanism for a crane proposed in this utility model;

[0017] Figure 3 for Figure 2 A magnified view of part A in the middle;

[0018] Figure 4 for Figure 2 A magnified view of part B in the middle section.

[0019] In the diagram: 1. Fixed base; 2. Protective housing; 3. Restricting housing; 4. Sliding housing; 5. Rubber pad; 6. Fixed spring; 7. Support rod one; 8. Sliding pressure plate; 9. Hydraulic damper; 10. Connecting spring; 11. Large spring; 12. Restricting spring; 13. Support rod two; 14. Support rod three; 15. Sliding plate one; 16. Small damper; 17. Sliding plate two; 18. Push rod; 19. Support spring; 20. Threaded block; 21. Rotating plate; 22. T-ring; 23. Sliding plate two; 24. Small spring; 25. Outer restricting frame. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-4 A flexible shock absorption mechanism for a traveling crane includes: a protective shell 2; a limiting shell 3 fixedly installed at the top of the protective shell 2; a sliding pressure plate 8 slidably installed inside the limiting shell 3; a hydraulic damper 9 fixedly installed inside the protective shell 2; the output end of the hydraulic damper 9 fixedly connected to the bottom end of the sliding pressure plate 8; a threaded block 20 threadedly connected to the outside of the hydraulic damper 9; a rotating plate 21 rotatably installed at the top of the threaded block 20; a large spring 11 fixedly installed at the top of the rotating plate 21; the top of the large spring 11 fixedly connected to the bottom end of the sliding pressure plate 8; a fixed spring 6 and a support rod 7 fixedly installed at the top of the sliding pressure plate 8; the fixed spring 6 sleeved on the outside of the support rod 7; and a sliding shell 4 fixedly installed at the top of the fixed spring 6 and the support rod 7, which slidably installs on the outside of the limiting shell 3.

[0022] In this embodiment, multiple connecting plates are integrally formed on the outer side of the support rod 1 7. Support rod 2 13, support rod 3 14 and two limiting springs 12 are fixedly installed at the bottom of the connecting plates. The two limiting springs 12 are respectively sleeved on the outer side of support rod 2 13 and support rod 3 14. The bottom ends of the two limiting springs 12 are fixedly installed on the top of the protective shell 2. The protective shell 2 has sliding grooves that match support rod 2 13 and support rod 3 14. The combination of multiple structures significantly reduces the vibration amplitude of vertical, horizontal and hook swing.

[0023] In this embodiment, a sliding plate 23 is fixedly installed at the bottom end of the support rod 2 13, an outer limiting frame 25 is fixedly installed at the bottom end of the sliding plate 23, a small spring 24 is fixedly installed inside the outer limiting frame 25, a push rod 18 is fixedly installed at the bottom end of the small spring 24, the push rod 18 is slidably installed inside the small spring 24, a sliding plate 2 17 is slidably installed inside the protective shell 2, a support spring 19 is fixedly installed on one side of the sliding plate 2 17, and one side of the push rod 18 is movably abutting against one side of the sliding plate 2 17, and the structure gradually stabilizes after multiple rebounds.

[0024] In this embodiment, a sliding plate 15 is fixedly installed at the bottom end of the support rod 14. A small damper 16 and a connecting spring 10 are fixedly installed at the bottom end of the sliding plate 15. The connecting spring 10 is sleeved on the outside of the small damper 16. The sliding plate 15 is slidably installed inside the protective shell 2 for better sliding. A fixed base 1 is fixedly installed on the outside of the protective shell 2. A limiting groove matching the protective shell 2 is opened on the fixed base 1. A rubber pad 5 is fixedly installed in the limiting groove. The top of the rubber pad 5 is fixedly connected to the bottom end of the protective shell 2 to further facilitate its movement.

[0025] In this embodiment, both the protective shell 2 and the limiting shell 3 are provided with circular grooves that match the hydraulic damper 9. The bottom end of the rotating plate 21 is integrally formed with a T-shaped ring 22. The T-shaped ring 22 is rotatably mounted on the top of the threaded block 20. The threaded block 20 is provided with a rotating groove that matches the T-shaped ring 22. The limiting shell 3 is provided with a sliding groove that matches the sliding pressure plate 8 to facilitate sliding.

[0026] In this embodiment, during use, when the crane generates a vertical impact, the sliding outer shell 4 is first pressed down by force, and the impact force is transmitted to the sliding pressure plate 8 through the support rod 7. The hydraulic damper 9, as the core shock absorption element, directly consumes the impact energy through the hydraulic oil flow resistance. The output end pushes the sliding pressure plate 8 to move downward. The large spring 11 is compressed synchronously with the hydraulic damper 9, and absorbs part of the energy through elastic deformation. Its stiffness can be adjusted by rotating the threaded block 20, and the rotating plate 21 rises and falls with the threaded block 20, changing the preload of the large spring 11. In the secondary buffer stage, during the downward pressing of the sliding pressure plate 8, the connecting plate on the outside of the support rod 7 drives the support rod 13 and the support rod 14 to move downward synchronously. The sliding plate 23 compresses the small spring 24 in the outer limiting frame 25. After being compressed, the push rod 18 slides obliquely, pushing the sliding plate 17 to compress the support spring 19, forming lateral energy. The design of the outer limiting frame 25 and the inclined surface of the push rod 18 disperses the vertical impact into horizontal displacement. The energy is further dissipated by the support spring 19. The sliding plate 15 compresses the small damper 16, and the connecting spring 10 assists in absorbing residual vibration, forming a double vertical buffer. The deformation energy of all buffer components is released in the following ways: the hydraulic damper 9 achieves controllable attenuation of the damping force; the large spring 11, the small spring 24, the support spring 19, and the connecting spring 10 gradually stabilize through multiple rebounds; the rubber pad 5 provides basic vibration isolation at the fixed base 1 to prevent vibration from being transmitted to the crane body; after the impact disappears, each spring assembly pushes the sliding pressure plate 8, the sliding housing 4, and other components back to their initial positions; the rotating threaded block 20 can change the preload of the large spring 11 to adapt to different working conditions and load requirements; the sliding groove of the limiting housing 3 limits the stroke of the sliding pressure plate 8 to prevent excessive compression and damage to the components.

[0027] The above provides a detailed description of a flexible shock absorption mechanism for a traveling crane provided by this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A flexible vibration damping mechanism for a traveling crane, characterized in that, include: A protective shell (2) is provided. A limiting shell (3) is fixedly installed at the top of the protective shell (2). A sliding pressure plate (8) is slidably installed inside the limiting shell (3). A hydraulic damper (9) is fixedly installed inside the protective shell (2). The output end of the hydraulic damper (9) is fixedly connected to the bottom end of the sliding pressure plate (8). A threaded block (20) is threadedly connected to the outside of the hydraulic damper (9). A rotating plate (21) is rotatably installed at the top of the threaded block (20). A large spring (11) is fixedly installed at the top of the rotating plate (21). The top of the large spring (11) is fixedly connected to the bottom end of the sliding pressure plate (8). A fixed spring (6) and a support rod (7) are fixedly installed at the top of the sliding pressure plate (8). The fixed spring (6) is sleeved on the outside of the support rod (7). A sliding shell (4) is fixedly installed at the top of the fixed spring (6) and the support rod (7). The sliding shell (4) is slidably installed on the outside of the limiting shell (3).

2. The flexible vibration damping mechanism for a traveling crane according to claim 1, characterized in that, The outer side of the support rod 1 (7) is integrally formed with multiple connecting plates. The bottom end of the connecting plate is fixedly installed with support rod 2 (13), support rod 3 (14) and two limiting springs (12). The two limiting springs (12) are respectively sleeved on the outer side of support rod 2 (13) and support rod 3 (14). The bottom end of the two limiting springs (12) is fixedly installed on the top of the protective shell (2). The protective shell (2) is provided with sliding grooves that match support rod 2 (13) and support rod 3 (14).

3. The flexible vibration damping mechanism for a traveling crane according to claim 2, characterized in that, The bottom end of the support rod 2 (13) is fixedly installed with a sliding plate 3 (23), the bottom end of the sliding plate 3 (23) is fixedly installed with an outer limiting frame (25), a small spring (24) is fixedly installed inside the outer limiting frame (25), a push rod (18) is fixedly installed at the bottom end of the small spring (24), the push rod (18) is slidably installed inside the small spring (24), the protective shell (2) is slidably installed with a sliding plate 2 (17), a support spring (19) is fixedly installed on one side of the sliding plate 2 (17), and one side of the push rod (18) is movably abutting against one side of the sliding plate 2 (17).

4. The flexible vibration damping mechanism for a traveling crane according to claim 2, characterized in that, The bottom end of the support rod three (14) is fixedly installed with a sliding plate one (15), and the bottom end of the sliding plate one (15) is fixedly installed with a small damper (16) and a connecting spring (10). The connecting spring (10) is sleeved on the outside of the small damper (16), and the sliding plate one (15) is slidably installed inside the protective shell (2).

5. A flexible vibration damping mechanism for a traveling crane according to claim 1, characterized in that, A fixed base (1) is fixedly installed on the outside of the protective shell (2). A limiting groove matching the protective shell (2) is opened on the fixed base (1). A rubber pad (5) is fixedly installed in the limiting groove. The top of the rubber pad (5) is fixedly connected to the bottom of the protective shell (2).

6. A flexible vibration damping mechanism for a traveling crane according to claim 2, characterized in that, Both the protective shell (2) and the limiting shell (3) are provided with circular grooves that match the hydraulic damper (9). The bottom end of the rotating plate (21) is integrally formed with a T-shaped ring (22). The T-shaped ring (22) is rotatably installed on the top of the threaded block (20). The threaded block (20) is provided with a rotating groove that matches the T-shaped ring (22). The limiting shell (3) is provided with a sliding groove that matches the sliding pressure plate (8).

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