Container gantry span adjustment device
By using a span adjustment device for container gantry cranes, the position of the clamping plates is adjusted by a motor-driven gear and threaded rod, which solves the problems of poor adaptability and low efficiency of traditional cranes, and realizes flexible adaptation and stable transfer of containers.
Patent Information
- Application Number
- CN202522426435.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-17
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-17
AI Technical Summary
Traditional container gantry cranes typically have fixed clamping mechanisms, making them unsuitable for containers of varying lengths and widths. They are cumbersome to operate and cannot simultaneously transport two containers, resulting in safety hazards and low efficiency.
An adjustment device, including a moving mechanism, a lifting mechanism, a clamping mechanism, and a drive assembly, is used to adjust the spacing and position of the clamping plates by driving gears and threaded rods with a motor, so as to achieve single or double container clamping and ensure stable container transfer.
It enables flexible adaptation to containers of different specifications, improves transshipment efficiency and safety, ensures the stability of simultaneous transshipment of single and double containers, and avoids container shaking and damage.
Smart Images
Figure CN224930195U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of cranes, and in particular to a span adjustment device for a container gantry crane. Background Technology
[0002] In container transshipment operations at ports and logistics hubs, container gantry cranes are one of the core pieces of equipment. Currently, traditional cranes suffer from two major problems: First, the clamping mechanisms are mostly fixed structures or only adaptable to a single container. When dealing with containers of different lengths and widths, frequent component replacements or equipment repositioning are required, making operations cumbersome and time-consuming, severely hindering transshipment efficiency. Second, existing adjustment devices can only clamp and transship a single container. When two containers need to be transshipped simultaneously, two separate operations are required, failing to meet the efficiency demands of high-density operations. Furthermore, some clamping mechanisms suffer from insufficient adjustment precision and poor clamping stability, easily leading to container swaying or damage, posing safety hazards and economic losses. Utility Model Content
[0003] To address the above problems, this application provides a span adjustment device for a container gantry crane.
[0004] The technical solution for a container gantry crane span adjustment device provided in this application is as follows: A span adjustment device for a container gantry crane includes: a crane body; an adjustment device installed on the crane body; the adjustment device includes a moving mechanism installed on the top surface of the crane body for horizontal position adjustment; a mounting plate installed below the moving mechanism via a lifting mechanism, the lifting mechanism driving the mounting plate to move vertically; a clamping mechanism installed on the bottom surface of the mounting plate for clamping and fixing a container; the clamping mechanism includes a rectangular shell installed on the bottom surface of the mounting plate; two L-shaped supports symmetrically distributed at the openings at both ends of the rectangular shell; four main clamping plates respectively located at the front and rear ends of the horizontal sections of the two L-shaped supports; and a drive assembly disposed within the rectangular shell for driving the two L-shaped supports to move relative to or opposite to each other along the length of the rectangular shell.
[0005] Preferably, the drive assembly includes a first motor mounted on the top surface of the mounting plate, the output end of which penetrates vertically through the rectangular shell and extends downward and is fitted with a gear; Two toothed plates are provided, symmetrically distributed within the rectangular shell, and both mesh with gears; The ends of the two toothed plates furthest from the gears are respectively connected to the vertical ends of the two L-shaped brackets.
[0006] Preferably, it also includes two cross-shaped sliding openings, which are symmetrically and continuously opened on the top surface of the rectangular shell; Two cross sliders are provided, which are symmetrically embedded in the two cross slider openings and their bottom surfaces are fixed to the toothed plates.
[0007] Preferably, the moving mechanism includes a track laid on the top surface of the crane body; A mobile trolley is slidably mounted on the track; The housing is located on the top surface of the mobile trolley, and the lifting mechanism is located inside the housing.
[0008] Preferably, the clamping mechanism further includes two fixing plates, which are arranged parallel to each other on the inner bottom surface of the rectangular shell along the length direction of the rectangular shell; A bidirectional threaded rod and a sliding rod are arranged parallel to each other between the two fixed plates along the width direction of the rectangular shell; Two movable rods are provided, which are sleeved parallel to the length direction of the rectangular shell on the outer wall of the bidirectional threaded rod and the slide rod.
[0009] Preferably, it also includes a second motor, mounted on the outer wall of one of the fixed plates, with its output end connected to one end of a bidirectional threaded rod.
[0010] Preferably, it also includes four rectangular openings that extend through the front and back of the rectangular shell in a rectangular shape; The two ends of the movable rod pass through corresponding rectangular openings and extend outwards to connect to the auxiliary clamping plate via a shaft. There are two connecting plates, one positioned between the front and one between the two moving rods.
[0011] In summary, this application includes the following beneficial technical effects: 1. The first motor drives the gear to rotate, which drives the two toothed plates to move in opposite directions (or relative directions). Guided by the cross slide and the cross slider, the L-shaped bracket moves smoothly, thereby adjusting the spacing of the four main clamping plates. When the spacing is reduced to fit the length of a single container, single clamping is achieved. When the spacing is expanded to fit the outer spacing of two containers, it is ready for double container clamping. 2. The second motor drives the bidirectional threaded rod to rotate, causing the two moving rods to move relative to or opposite to each other along the slide bar. When clamping a single container, the two auxiliary clamping plates move towards the middle, fitting against the front and rear sides of the container, forming a double fixation at the four corners and sides with the main clamping plate. When clamping two containers, the two auxiliary clamping plates move to the sides, fitting against the inner sides of the two containers respectively, forming a clamping effect with the main clamping plate (fitting against the outer corners) on the outer corners and inner sides of each container, ensuring that the two containers do not collide and are stable and reliable when transported synchronously. Attached Figure Description
[0012] Figure 1This is a schematic diagram of the overall structure of the device in the embodiments of this application; Figure 2 This is a schematic diagram of the external structure of the clamping mechanism in the embodiments of this application; Figure 3 This is a schematic diagram of the driving component structure in an embodiment of this application; Figure 4 This is a schematic diagram of the auxiliary clamp adjustment structure in an embodiment of this application.
[0013] Explanation of reference numerals in the attached drawings: 1. Crane body; 2. Rail; 3. Moving trolley; 4. Housing; 5. Mounting plate; 6. Clamping mechanism; 7. First motor; 8. L-shaped bracket; 9. Main clamping plate; 10. Rectangular shell; 11. Rectangular opening; 12. Auxiliary clamping plate; 13. Connecting plate; 14. Cross slide; 16. Cross slider; 17. Toothed plate; 18. Gear; 19. Fixed plate; 20. Second motor; 22. Bidirectional threaded rod; 23. Slide rod; 24. Moving rod. Detailed Implementation
[0014] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.
[0015] This application discloses a span adjustment device for a container gantry crane, referring to... Figure 1 The system includes a crane body 1, an adjustment device mounted on the crane body 1, used to adjust the horizontal position, vertical height, and stable clamping of one or two containers. The adjustment device includes a moving mechanism mounted on the top surface of the crane body 1 to achieve horizontal alignment with the container and adapt to the spacing requirements of one or two containers. A mounting plate 5 is mounted below the moving mechanism via a lifting mechanism. The lifting mechanism (such as a hydraulic lift or electric push rod) is used to drive the mounting plate 5 to rise and fall vertically, adjusting the height difference between the clamping mechanism 6 and the container to adapt to containers with different stacking heights. The clamping mechanism 6 is mounted on the bottom surface of the mounting plate 5 and is the core clamping component. Through the coordinated action of the main clamping plate 9 and the auxiliary clamping plate 12, it achieves stable clamping of a single container or synchronous clamping of two containers.
[0016] Furthermore, the moving mechanism includes a track 2, which is laid on the top surface of the crane body 1 along its span direction, providing precise guidance for the moving trolley 3 and ensuring the horizontal stability of the clamping mechanism 6 during movement. The moving trolley 3 is slidably mounted on the track 2 and can move smoothly along the length of the track 2. Its movement accuracy can be controlled by a servo motor or a stepper motor to meet the accuracy requirements for adjusting the distance between two containers. The housing 4 is fixed on the top surface of the moving trolley 3 and has a built-in lifting mechanism inside, which also serves to protect the lifting mechanism and prevent dust, rainwater and other impurities from affecting the service life and operational stability of the lifting mechanism.
[0017] Reference Figure 2 The clamping mechanism 6 includes a rectangular shell 10, which is fixed to the bottom surface of the mounting plate 5 as the mounting base of the clamping mechanism 6. Two L-shaped brackets 8 are provided, symmetrically distributed at the openings at both ends of the rectangular shell 10. Each L-shaped bracket 8 includes a horizontal section and a vertical section. The horizontal section extends to the outside of the rectangular shell 10. Four main clamping plates 9 are provided, which are fixed to the front and rear ends of the horizontal sections of the two L-shaped brackets 8 respectively. The four main clamping plates 9 are arranged in a rectangular shape. When clamping a single container, the four main clamping plates 9 can fit against the four corners of the container respectively to form a stable four-corner clamping. When clamping two containers, the four main clamping plates 9 can be divided into two groups (two in each group), corresponding to the outer corners of the two containers respectively, providing a basis for synchronous clamping.
[0018] Reference Figures 1-4 The drive assembly includes a first motor 7, which is fixed on the top surface of the mounting plate 5. The output end of the first motor 7 vertically penetrates the rectangular shell 10 and is fitted with a gear 18. Two gear plates 17 are provided, symmetrically distributed inside the rectangular shell 10, and both mesh with the gear 18. The end of the gear plate 17 away from the gear 18 is fixed to the vertical section of the L-shaped bracket 8. Two cross slides 14 are provided, symmetrically opened on the top surface of the rectangular shell 10. The cross slider 16 is embedded in the cross slide 14 and its bottom surface is fixed to the gear plate 17.
[0019] During operation, the first motor 7 drives the gear 18 to rotate, which in turn drives the two toothed plates 17 to move in opposite directions (or relative directions). Guided by the cross slide 14 and the cross slider 16, the L-shaped bracket 8 moves smoothly, thereby adjusting the spacing of the four main clamping plates 9. When the spacing is reduced to fit the length of a single container, single clamping is achieved. When the spacing is expanded to fit the outer spacing of two containers, it is ready for double container clamping.
[0020] Reference Figures 3-4 It also includes two fixing plates 19, which are fixed parallel to the inner bottom surface of the rectangular shell 10, serving as supports for the bidirectional threaded rod 22 and the sliding rod 23. The bidirectional threaded rod 22 and the sliding rod 23 are mounted parallel to each other between the fixing plates 19 along the width direction of the rectangular shell 10. The two ends of the bidirectional threaded rod 22 are rotatably connected to the fixing plates 19, and the two ends of the sliding rod 23 are fixed to the fixing plates 19. Two moving rods 24 are provided, which are sleeved parallel to the outer walls of the bidirectional threaded rod 22 and the sliding rod 23. The moving rods 24 are threadedly connected to the bidirectional threaded rod 22 and slidably connected to the sliding rod 23. The second motor 20 is fixed to the outer wall of the fixing plate 19, and its output end is connected to the bidirectional threaded rod 22. Four rectangular openings 11 are opened on the front and rear sides of the rectangular shell 10. The two ends of the moving rods 24 pass through the rectangular openings 11 and are connected to the auxiliary clamping plate 12 through the shaft. The front and rear moving rods 24 are fixed together by the connecting plate 13.
[0021] During operation, the second motor 20 drives the bidirectional threaded rod 22 to rotate, causing the two moving rods 24 to move relative to or opposite to each other along the slide rod 23. When clamping a single container, the two auxiliary clamping plates 12 move towards the middle, fitting against the front and rear sides of the container, forming a double fixation at the four corners and sides with the main clamping plate 9. When clamping two containers, the two auxiliary clamping plates 12 move to the sides, fitting against the inner sides of the two containers respectively, forming a clamping effect with the main clamping plate 9 (fitting against the outer corners) on the outer corners and inner sides of each container, ensuring that the two containers do not collide and are stable and reliable when transported synchronously.
[0022] The implementation principle of a container gantry crane span adjustment device according to an embodiment of this application is as follows: Single container clamping and transshipment process Based on the position of the container on the ground, control the moving trolley 3 to slide along the track 2, so that the clamping mechanism 6 moves to directly above the container; Start the first motor 7, the gear 18 rotates and drives the two toothed plates 17 to move relative to each other, and through the L-shaped bracket 8 drive the four main clamping plates 9 to move closer to the center until the spacing of the main clamping plates 9 matches the length of the container (the four main clamping plates 9 are respectively aligned with the four corners of the container). Start the second motor 20, the bidirectional threaded rod 22 rotates and drives the two moving rods 24 to move relative to each other, so that the auxiliary clamping plate 12 moves closer to the middle until the auxiliary clamping plate 12 is aligned with the front and rear sides of the container. Start the lifting mechanism, drive the mounting plate 5 to move the clamping mechanism 6 vertically downward until the main clamping plate 9 fits against the corner of the container and the auxiliary clamping plate 12 fits against the side of the container, thus completing the clamping; The mobile trolley 3 transports the container to the target location along the track 2. The lifting mechanism descends, and the first motor 7 and the second motor 20 are started in reverse. The main clamping plate 9 and the auxiliary clamping plate 12 are released, completing the transfer of a single container.
[0023] Simultaneous clamping and transfer process of two containers Based on the spacing between the two containers (parallel placement), control the trolley 3 to slide along the track 2, so that the clamping mechanism 6 moves to directly above the two containers (ensuring that the main clamping plate 9 can cover the outer corners of the two containers). Start the first motor 7, the gear 18 rotates and drives the two toothed plates 17 to move in opposite directions, and through the L-shaped bracket 8 drive the four main clamping plates 9 to open to both sides until the two sets of main clamping plates 9 (two in each set) are respectively aligned with the outer corners of the two containers. Start the second motor 20, the bidirectional threaded rod 22 rotates and drives the two moving rods 24 to move in opposite directions, so that the two auxiliary clamps 12 move to the sides and are respectively aligned with the inner sides of the two containers; Start the lifting mechanism, drive the mounting plate 5 to drive the clamping mechanism 6 to descend vertically until the main clamping plate 9 is attached to the outer corner of the two containers and the auxiliary clamping plate 12 is attached to the inner side of the two containers, thus completing the synchronous clamping of the two containers. The mobile trolley 3 transports the two containers synchronously to the target position along the track 2. The lifting mechanism descends, and the first motor 7 and the second motor 20 are started in reverse. The main clamping plate 9 and the auxiliary clamping plate 12 are released to complete the synchronous transport of the two containers.
[0024] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
[0025] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A span adjustment device for a container gantry crane, characterized in that, include: Crane body (1); An adjustment device is installed on the crane body (1); The adjustment device includes a moving mechanism installed on the top surface of the crane body (1) for horizontal position adjustment; The mounting plate (5) is installed below the moving mechanism via a lifting mechanism, which drives the mounting plate (5) to move up and down in the vertical direction. The clamping mechanism (6) is installed on the bottom surface of the mounting plate (5) and is used to clamp and fix the container. The clamping mechanism (6) includes a rectangular shell (10) mounted on the bottom surface of the mounting plate (5); Two L-shaped brackets (8) are provided, symmetrically distributed at the two ends of the rectangular shell (10); The main clamping plate (9) has four parts, which are respectively set at the front and rear ends of the horizontal sections of the two L-shaped brackets (8); A drive assembly, disposed within the rectangular shell (10), is used to drive two L-shaped supports (8) to move relative to or opposite to each other along the length of the rectangular shell (10).
2. The span adjustment device for a container gantry crane according to claim 1, characterized in that: The drive assembly includes a first motor (7) mounted on the top surface of the mounting plate (5), with its output end vertically penetrating the rectangular shell (10) and extending downward to accommodate a gear (18). Two toothed plates (17) are provided, symmetrically distributed within the rectangular shell (10), and both mesh with the gear (18); The ends of the two toothed plates (17) away from the gear (18) are respectively connected to the vertical ends of the two L-shaped brackets (8).
3. The span adjustment device for a container gantry crane according to claim 2, characterized in that: It also includes a cross-shaped sliding opening (14), of which two are provided and are symmetrically and continuously opened on the top surface of the rectangular shell (10); Two cross sliders (16) are provided, which are symmetrically embedded in the two cross sliders (14) and their bottom surfaces are fixed to the toothed plate (17).
4. The span adjustment device for a container gantry crane according to claim 1, characterized in that: The moving mechanism includes a track (2) laid on the top surface of the crane body (1); The mobile trolley (3) is slidably mounted on the track (2); The housing (4) is located on the top surface of the mobile trolley (3), and the lifting mechanism is located inside the housing (4).
5. The span adjustment device for a container gantry crane according to claim 1, characterized in that: The clamping mechanism (6) also includes two fixing plates (19), which are arranged parallel to the length direction of the rectangular shell (10) on the inner bottom surface of the rectangular shell (10); A two-way threaded rod (22) and a sliding rod (23) are arranged parallel to each other between two fixed plates (19) along the width direction of the rectangular shell (10); Two movable rods (24) are provided, which are sleeved parallel to the length direction of the rectangular shell (10) on the outer wall of the bidirectional threaded rod (22) and the slide rod (23).
6. The span adjustment device for a container gantry crane according to claim 5, characterized in that: It also includes a second motor (20), which is mounted on the outer wall of one of the fixed plates (19), and its output end is connected to one end of a bidirectional threaded rod (22).
7. The span adjustment device for a container gantry crane according to claim 5, characterized in that: It also includes rectangular openings (11), of which four are provided, which are rectangular and extend through the front and back of the rectangular shell (10); The two ends of the moving rod (24) pass through the corresponding rectangular openings (11) and extend outward to connect to the auxiliary clamping plate (12) via the shaft. There are two connecting plates (13), which are respectively set between the front and rear moving rods (24).