Crane trolley damping device

Abstract

A crane trolley damping device relates to the technical field of cranes and comprises a trolley frame, a wheel assembly and a damping assembly. Wheel assemblies driven by motors are hinged to the four corner ends of the trolley frame through hinge shafts; a damping assembly is arranged between the wheel assembly and the trolley frame; the vibration reduction assembly comprises a fixing plate correspondingly connected with the trolley frame in a fastened mode, a floating plate is arranged on the side, corresponding to the wheel assembly, of the fixing plate, an elastic element is arranged between the floating plate and the fixing plate, and adjusting assemblies used for adjusting the floating stroke of the floating plate are arranged on the two sides corresponding to the elastic element. The side, corresponding to the wheel assembly, of the floating plate is provided with an ejector head correspondingly abutting against the wheel assembly. The device is simple in structure; the length of the bolt extending out of the threaded sleeve is adjusted by screwing the bolt, the compression amount of the elastic element is adjusted, the purpose of adjusting the height position of the wheel assembly is achieved, and it is guaranteed that the four wheel assemblies can make contact with the trolley track face.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, and in particular to a vibration damping device for a crane trolley. Background Technology

[0002] Cranes, as key equipment in modern industrial production and manufacturing, are widely used in steel, shipbuilding, aerospace, road transportation, and port terminals. In specific high-level working environments, such as grab cranes, container cranes, and loading / unloading bridges, high speeds are required for the trolley traveling mechanism, which can reach 60 to 100 meters per minute or even faster. Such high speeds exert significant horizontal impact forces on the crane bridge.

[0003] Traditional trolley designs typically employ four wheels with a rigid connection between the wheels and the trolley frame. Due to the relatively small track gauge and wheelbase of these trolleys, coupled with their high overall structural rigidity, it's difficult to ensure all wheel treads remain on the same horizontal plane. This easily leads to the "three-legged" phenomenon, where one wheel fails to effectively contact the track. When the trolley brakes suddenly at high speed, this "three-legged" problem exacerbates the horizontal impact force and triggers severe vibrations.

[0004] To improve the service life of crane bridges and increase operational safety, reducing vibration on these high-speed trolleys is crucial. Therefore, the trolley design needs to be improved to accommodate smooth operation at high speeds while ensuring maximum mitigation of impact and vibration during emergency braking.

[0005] Chinese patent (publication number: CN201745593U) discloses an elastic support device for a billet transport vehicle. The patent includes a rotating support, a spring, a spring guide rod, and a hinged support. The wheel assembly is bolted to the rotating support, and the rotating support is hinged to the vehicle frame via a pin. The rotating support is hinged to one end of the spring guide rod, and the other end of the spring guide rod is hinged to the vehicle frame using hinged bolts. The spring is placed horizontally and fitted onto the spring guide rod. In actual use, it was found that the compression of the spring in this patent cannot be adjusted, which is not conducive to assembly and debugging. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, this utility model discloses a vibration reduction device for a crane trolley.

[0007] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0008] A vibration damping device for a crane trolley includes a trolley frame, wheel assemblies, and a vibration damping assembly. Each of the four corner ends of the trolley frame is hinged to a motor-driven wheel assembly via a hinge shaft. A vibration damping assembly is provided between the wheel assemblies and the trolley frame. The vibration damping assembly includes a fixed plate corresponding to and fastened to the trolley frame. A floating plate is provided on one side of the fixed plate corresponding to the wheel assembly. An elastic element is provided between the floating plate and the fixed plate. Adjustment components for adjusting the floating plate's floating stroke are provided on both sides of the elastic element. A top head is provided on one side of the floating plate corresponding to the wheel assembly, capable of correspondingly abutting against the wheel assembly.

[0009] Preferably, the adjusting assembly includes a bolt through which the rod moves through the floating plate, and a threaded sleeve with one end perpendicularly fastened to the fixed plate at the position corresponding to the bolt, and the bolt and the threaded sleeve are connected by corresponding threads.

[0010] Preferably, the bolt shank is threaded with an anti-loosening nut that can engage with the threaded sleeve.

[0011] Preferably, the top head has a hemispherical or arc-shaped structure on one side corresponding to the wheel assembly; the wheel assembly is fastened to a mounting plate at the position corresponding to the vibration damping component, and the mounting plate is provided with a dent at the position corresponding to the top head, and the dent is provided with a groove that can be matched with the top head.

[0012] Preferably, a limiting bolt for movable through-vibration damping assembly is provided between the wheel assembly and the trolley frame, and an anti-loosening nut is installed at one end of the limiting bolt.

[0013] Preferably, the elastic element is a pagoda-shaped truncated conical spiral spring or a compression spring.

[0014] Preferably, a horizontal guide wheel is provided on one side of the wheel assembly.

[0015] By adopting the technical solution described above, this utility model has the following beneficial effects:

[0016] This utility model discloses a vibration damping device for a crane trolley, which has a simple structure, is easy to assemble, and has a low production cost. A vibration damping component is provided between the wheel assembly and the trolley frame. The wheel assembly and the trolley frame are connected by a hinge to ensure that all wheel assemblies can contact the trolley track surface, avoiding the phenomenon of three support points and reducing vibration during trolley operation. An elastic element is provided between the floating plate and the fixed plate. An adjustment component for adjusting the floating stroke of the floating plate is provided on both sides of the elastic element. The length of the bolt extending out of the threaded sleeve is adjusted by turning the bolt, thereby adjusting the maximum distance between the floating plate and the fixed plate and adjusting the compression of the elastic element, so as to adjust the height position of the wheel assembly and ensure that all four wheel assemblies can contact the trolley track surface.

[0017] This invention further makes the side of the top head corresponding to the wheel assembly have a hemispherical or arc-shaped structure. The wheel assembly is fastened to the position of the vibration damping component. The mounting plate is provided with a dent at the position of the top head. The dent is provided with a groove that can be matched with the top head. The top head and the groove of the dent are matched and cooperated, so that the top head can be subjected to force along its axial direction, so that the elastic element can better offset the vibration impact force, and further improve the reliability and vibration damping performance of the vibration damping component. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram showing the usage status of the vibration damping components;

[0020] Figure 3 This is a schematic diagram of the vibration damping component.

[0021] In the diagram: 1. Car frame; 2. Wheel assembly; 3. Vibration damping assembly; 3-1. Fixing plate; 3-2. Floating plate; 3-3. Elastic element; 3-4. Top head; 3-5. Screw sleeve; 3-6. Bolt; 3-7. Anti-loosening nut; 3-8. Mounting plate; 3-9. Impact dent; 4. Hinge shaft; 5. Limit bolt; 6. Anti-loosening nut; 7. Horizontal guide wheel. Detailed Implementation

[0022] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0023] Example 1, in conjunction with Appendix Figures 1-3 A vibration damping device for a crane trolley includes a trolley frame 1, wheel assemblies 2, and vibration damping components 3. Each of the four corner ends of the trolley frame 1 is hinged to a motor-driven wheel assembly 2 via a hinge shaft 4. The vibration damping components 3 are provided between the wheel assembly 2 and the trolley frame 1. The wheel assembly 2 and the trolley frame 1 are connected together by hinges to ensure that the wheel assembly 2 can contact the trolley track surface, avoiding the situation of three-point support, and reducing vibration during trolley operation.

[0024] The vibration damping component 3 includes a fixed plate 3-1 that is fastened to the trolley frame 1. A floating plate 3-2 is provided on one side of the fixed plate 3-1 corresponding to the wheel assembly 2. An elastic element 3-3 is provided between the floating plate 3-2 and the fixed plate 3-1. Adjustment components for adjusting the floating stroke of the floating plate 3-2 are provided on both sides of the elastic element 3-3. A top head 3-4 that can abut against the wheel assembly 2 is provided on one side of the floating plate 3-2 corresponding to the wheel assembly 2. When the trolley brakes, the horizontal inertial force generated in the direction of the trolley's movement causes vibrations that are transmitted to the elastic element 3-3 through the top head 3-4 and the floating plate 3-2. The elastic element 3-3 can counteract these vibration impacts.

[0025] It should be noted that the elastic element 3-3 is a pagoda-shaped truncated conical spiral spring or a compression spring, preferably a pagoda-shaped truncated conical spiral spring, because such a spring can withstand a large load in a limited space and absorb a large deformation energy, making the overall structure of the vibration damping component 3 more compact and having good vibration damping and impact resistance performance.

[0026] The adjustment assembly includes a bolt 3-6 whose rod body moves through the floating plate 3-2. The fixed plate 3-1 has a threaded sleeve 3-5 at the position corresponding to the bolt 3-6, with one end being vertically fastened to the fixed plate 3-1. The bolt 3-6 and the threaded sleeve 3-5 are threadedly connected. That is, the length of the bolt 3-6 extending out of the threaded sleeve 3-5 can be adjusted by turning the bolt 3-6, thereby adjusting the maximum distance between the floating plate 3-2 and the fixed plate 3-1, adjusting the compression of the elastic element 3-3, and achieving the purpose of adjusting the height of the wheel assembly 2, ensuring that all four wheel assemblies 2 can contact the trolley track surface.

[0027] Furthermore, the bolt 3-6 is threaded with an anti-loosening nut 3-7 that can abut against the threaded sleeve 3-5, thereby preventing the bolt 3-6 from loosening accidentally.

[0028] To further improve the reliability and vibration reduction performance of the vibration damping component 3, the top head 3-4 is designed as a hemispherical or arc-shaped structure on one side corresponding to the wheel component 2; the wheel component 2 is fastened to the position corresponding to the vibration damping component 3 with a mounting plate 3-8, and the mounting plate 3-8 is provided with a dent 3-9 corresponding to the position of the top head 3-4. The dent 3-9 is equipped with a groove that can be adapted to the top head 3-4. The top head 3-4 and the groove of the dent 3-9 cooperate to make the top head 3-4 bear force along its axial direction, so that the elastic element 3-3 can more effectively offset the vibration impact.

[0029] A limiting bolt 5 is provided between the wheel assembly 2 and the trolley frame 1, which can move through the vibration damping component 3. One end of the limiting bolt 5 is equipped with an anti-loosening nut 6. The limiting bolt 5 and the anti-loosening nut 6 limit the maximum deflection angle of the wheel assembly 2 away from the trolley frame 1, and prevent the vibration damping component 3 from separating from the trolley frame 1.

[0030] Example 2, in conjunction with Appendix Figure 1 A vibration damping device for a crane trolley, which differs from Embodiment 1 in that, based on Embodiment 1, a horizontal guide wheel 7 is provided on one side of the wheel assembly 2. The horizontal guide wheel 7 can effectively prevent the wheel assembly 2 from biting the rail during the operation of the trolley, thus avoiding vibration caused by the trolley biting the rail.

[0031] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents within this utility model.

Claims

1. A vibration damping device for a crane trolley, characterized in that: The device includes a frame (1), wheel assembly (2), and vibration damping assembly (3); the four corners of the frame (1) are all hinged to the wheel assembly (2) driven by a motor through hinge shafts (4); the vibration damping assembly (3) is provided between the wheel assembly (2) and the frame (1); the vibration damping assembly (3) includes a fixed plate (3-1) that is fastened to the frame (1), a floating plate (3-2) is provided on one side of the fixed plate (3-1) corresponding to the wheel assembly (2), an elastic element (3-3) is provided between the floating plate (3-2) and the fixed plate (3-1), and an adjustment assembly for adjusting the floating stroke of the floating plate (3-2) is provided on both sides of the elastic element (3-3); the floating plate (3-2) is provided on one side of the wheel assembly (2) corresponding to the wheel assembly (2) and has a top head (3-4) that can abut against the wheel assembly (2).

2. The crane trolley vibration damping device as described in claim 1, characterized in that: The adjustment assembly includes a bolt (3-6) through which the rod moves through the floating plate (3-2). The fixed plate (3-1) is provided with a threaded sleeve (3-5) at the position corresponding to the bolt (3-6), one end of which is vertically fastened to the fixed plate (3-1). The bolt (3-6) and the threaded sleeve (3-5) are connected by threads.

3. The crane trolley vibration damping device as described in claim 2, characterized in that: The bolt (3-6) has a threaded connection to a locking nut (3-7) that can abut against the threaded sleeve (3-5).

4. The crane trolley vibration damping device as described in claim 1, characterized in that: The top head (3-4) has a hemispherical or arc-shaped structure on one side of the wheel assembly (2); the wheel assembly (2) is fastened to the position of the vibration damping assembly (3) with a mounting plate (3-8), and the mounting plate (3-8) is provided with a dent (3-9) at the position of the top head (3-4), and the dent (3-9) is provided with a groove that can be matched with the top head (3-4).

5. The crane trolley vibration damping device as described in claim 1, characterized in that: The wheel assembly (2) and the trolley frame (1) are provided with a limiting bolt (5) that can be moved through the damping assembly (3), and an anti-loosening nut (6) is installed at one end of the limiting bolt (5).

6. The crane trolley vibration damping device as described in claim 1, characterized in that: The elastic element (3-3) is a pagoda-shaped truncated conical spiral spring or a compression spring.

7. The crane trolley vibration damping device as described in claim 1, characterized in that: A horizontal guide wheel (7) is provided on one side of the wheel assembly (2).

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