Gantry crane girder structure
By installing vibration damping components, including guide rods, guide sleeves, cross plates, and vibration dampers, on the main beam of the bridge gantry crane, a vibration damping system is formed, which solves the problems of cracking, deformation, and fatigue of the main beam under weight and vibration, and improves its service life and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2026-03-13
AI Technical Summary
The main beam structure of existing bridge cranes is prone to cracking, deformation and fatigue when subjected to weight and vibration, and lacks buffer and vibration reduction settings, resulting in insufficient service life and safety.
The structure adopts a combination of installation beam, hoisting beam, upper mounting plate, lower mounting plate, vibration damping components and fixing plate. The vibration damping components include guide rods, guide sleeves, cross plates and vibration dampers. The connection between the vibration damping components and the fixing plate forms a vibration damping system to improve the vibration damping effect of the main beam.
It effectively reduces cracks, deformation, and fatigue in the main beam structure, increases service life, and enhances safety.
Smart Images
Figure CN223990841U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of crane technology, and more specifically, to a main beam structure for a bridge gantry crane. Background Technology
[0002] Gantry cranes are widely used for lifting goods in various situations and are currently the most widely used lifting equipment in industrial enterprises. A gantry crane consists of end beams, main beams, and trolley winches, among which the main beam is one of the most important load-bearing components. The stiffness and strength of the main beam are directly related to the safety performance of the crane, so the stiffness and strength of the main beam are key technical indicators of the crane.
[0003] The main beam of a gantry crane consists of an installation beam and a hoisting beam. The installation beam mainly serves to support the installation, while the hoisting beam is mainly used to connect with the trolley winch. The main beam of a gantry crane is frequently subjected to weight and vibration, which can lead to problems such as cracks, deformation, and fatigue. However, the main beams of existing gantry cranes are simple I-shaped, H-shaped, or box-shaped structures without any buffer or vibration reduction features, and their service life and safety need to be improved. Utility Model Content
[0004] The purpose of this utility model is to solve the problems mentioned in the background art, and then to propose a main beam structure for a bridge gantry crane.
[0005] The technical solution adopted by this utility model to solve its technical problem is:
[0006] A main beam structure for a bridge gantry crane includes an installation beam, a hoisting beam, an upper mounting plate, a lower mounting plate, vibration damping components, and a fixing plate. The installation beam and the hoisting beam are independently set, and the upper and lower ends of the installation beam are respectively provided with an upper mounting plate and a lower mounting plate. The upper and lower mounting plates are symmetrically arranged, and their widths are both greater than the width of the installation beam to form a groove on each of the front and rear sides of the installation beam. Vibration damping components are set in the grooves, and the vibration damping components are connected to the hoisting beam through the fixing plate.
[0007] Furthermore, the vibration damping assembly includes guide rods, guide sleeves, cross plates, and vibration dampers; there are four guide rods, which are vertically arranged at the ends of the two grooves respectively. Guide sleeves are slidably fitted on the guide rods, and a cross plate is connected between the two guide sleeves in the same groove. The cross plate is connected to the vibration damper arranged in the groove, and a fixing plate is connected to the bottom of the two cross plates.
[0008] Furthermore, there are at least four vibration dampers, and the number of vibration dampers in the two grooves is the same to improve the vibration damping effect.
[0009] Furthermore, the vibration dampers within the same tank are arranged at evenly distributed points along the tank to ensure that the vibration dampers are subjected to balanced forces.
[0010] Furthermore, the vibration damping assembly also includes a lower spring and an upper spring; both the lower spring and the upper spring are sleeved on the outside of the guide rod, with the lower spring located below the guide sleeve and the upper spring located above the guide sleeve.
[0011] Furthermore, the upper mounting plate and the lower mounting plate are respectively welded to the upper and lower end faces of the mounting beam to improve the strength of the connection.
[0012] Furthermore, the fixing plate has a U-shaped structure to improve its structural stability.
[0013] Furthermore, the cross plate is welded between the two guide sleeves to improve the strength of the connection.
[0014] Furthermore, the fixing plate is welded to the bottom end of the horizontal plate.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] This utility model, through the coordinated design of the installation beam, the hoisting beam, the upper mounting plate, the lower mounting plate, the vibration damping components, and the fixing plate, enables the installation beam and the hoisting beam to have a vibration damping function. During use, it can improve the vibration damping effect, reduce the generation of cracks, deformation and fatigue in the main beam structure, and improve the service life of the main beam structure. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model;
[0018] Figure 2 for Figure 1 A magnified view of part A in the image;
[0019] The components include: 1. Installation beam; 2. Hoisting beam; 3. Upper mounting plate; 4. Lower mounting plate; 5. Vibration damping assembly; 51. Guide rod; 52. Guide sleeve; 53. Horizontal plate; 54. Vibration damper; 55. Lower spring; 56. Upper spring; 6. Fixing plate. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:
[0021] See attached document Figure 1 -Appendix Figure 2 As shown, a main beam structure for a bridge gantry crane includes an installation beam 1, a hoisting beam 2, an upper mounting plate 3, a lower mounting plate 4, a vibration damping assembly 5, and a fixing plate 6.
[0022] The installation beam 1 and the hoisting beam 2 are set independently. The upper and lower ends of the installation beam 1 are respectively welded with an upper mounting plate 3 and a lower mounting plate 4. The upper mounting plate 3 and the lower mounting plate 4 are symmetrically arranged and both are wider than the width of the installation beam 1 to form a groove on each of the front and rear sides of the installation beam 1. The groove is equipped with a vibration damping component 5, and the vibration damping component 5 is connected to the hoisting beam 2 through a U-shaped fixing plate 6.
[0023] Regarding the above scheme, specifically the structure of vibration damping component 5:
[0024] See attached document Figure 2 As shown, the vibration damping assembly 5 includes guide rods 51, guide sleeves 52, horizontal plates 53, and vibration dampers 54. There are four guide rods 51, which are vertically arranged at the ends of the two grooves. Guide sleeves 52 are slidably fitted on the guide rods 51. A horizontal plate 53 is welded between the two guide sleeves 52 in the same groove. The horizontal plate 53 is connected to the vibration damper 54 in the groove. A fixing plate 6 is welded to the bottom of the two horizontal plates 53.
[0025] In order to achieve the vibration reduction effect, there are at least four vibration dampers 54, and the number of vibration dampers 54 in the two tanks is the same. In addition, the vibration dampers 54 in the same tank are set at the evenly distributed points of the tank so that the vibration dampers 54 are subjected to balanced forces.
[0026] In addition, to improve the performance of the vibration damping component 5, the vibration damping component 5 also includes a lower spring 55 and an upper spring 56; both the lower spring 55 and the upper spring 56 are sleeved on the outside of the guide rod 51, with the lower spring 55 located below the guide sleeve 52 and the upper spring 56 located above the guide sleeve 52.
[0027] In the specific implementation of this utility model, the installation beam 1 is used to install onto the bracket, and the hoisting beam 2 is connected to the trolley winch. When the hoisting beam 2 vibrates, the vibration damping component 5 will control the interference vibration and keep its adverse effects within an acceptable range.
[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1.A bridge gantry crane girder structure comprising a mounting beam body (1) and a hoisting beam body (2); characterized in that: it further comprises an upper mounting plate (3), a lower mounting plate (4), a damping assembly (5) and a fixing plate (6); the mounting beam body (1) and the hoisting beam body (2) are independently arranged, and the upper mounting plate (3) and the lower mounting plate (4) are arranged on the upper end face and the lower end face of the mounting beam body (1) respectively, the upper mounting plate (3) and the lower mounting plate (4) are symmetrically arranged and the width of each is greater than the width of the mounting beam body (1) to form a groove on each side of the mounting beam body (1), the damping assembly (5) is arranged in the groove, and the damping assembly (5) is connected with the hoisting beam body (2) through the fixing plate (6). 2.The bridge gantry crane girder structure according to claim 1, characterized in that: the damping assembly (5) comprises a guide rod (51), a guide sleeve (52), a cross plate (53) and a damper (54); the guide rod (51) has four vertical arrangements at the end positions of the two grooves, the guide sleeve (52) is slidingly fitted on the guide rod (51), and the two guide sleeves (52) in the same groove are connected by a cross plate (53), the cross plate (53) is connected with the damper (54) arranged in the groove, and the bottom ends of the two cross plates (53) are connected with the fixing plate (6). 3.The bridge gantry crane girder structure according to claim 2, characterized in that: the damper (54) has at least four, and the number of dampers (54) in the two grooves is consistent. 4.The bridge gantry crane girder structure according to claim 2, characterized in that: the dampers (54) in the same groove are arranged at the equal division points of the groove. 5.The bridge gantry crane girder structure according to claim 2, characterized in that: the damping assembly (5) further comprises a lower spring (55) and an upper spring (56); the lower spring (55) and the upper spring (56) are both arranged outside the guide rod (51), and the lower spring (55) is below the guide sleeve (52) and the upper spring (56) is above the guide sleeve (52). 6.The bridge gantry crane girder structure according to claim 1, characterized in that: the upper mounting plate (3) and the lower mounting plate (4) are respectively welded on the upper end face and the lower end face of the mounting beam body (1). 7.The bridge gantry crane girder structure according to claim 1, characterized in that: the fixing plate (6) is in a U-shaped structure. 8.The bridge gantry crane girder structure according to claim 2, characterized in that: the cross plate (53) is welded between the two guide sleeves (52). 9.The bridge gantry crane girder structure according to claim 2, characterized in that: the fixing plate (6) is welded with the bottom end of the cross plate (53).