Gantry crane

Abstract

The utility model relates to the technical field of cargo loading and unloading, and discloses a gantry crane which comprises a portal frame, a limiting frame is fixedly installed at the bottom in the portal frame, a sliding groove is formed in the limiting frame, sleeve blocks are movably installed in the sliding groove, and two-way lead screws are connected to the interiors of the two sleeve blocks in a threaded and sleeved mode. Compared with a traditional crane, the crane has the advantages that the distance between the two electric hoists is adjusted through the cooperation of the sleeve blocks and the two-way lead screws, the flexibility of hoisting operation is greatly improved, the distance between the electric hoists is allowed to be accurately adjusted according to the size of goods through the adjusting mode, various hoisting requirements are easily met, and the hoisting efficiency is improved. Compared with the prior art, high adaptability and flexibility are shown, meanwhile, the accurate distance between the electric hoists ensures the stability of goods in the hoisting process, the risk that the goods incline or fall off due to improper distance is effectively reduced, and the safety of hoisting operation is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of cargo loading and unloading technology, and more specifically, to a gantry crane. Background Technology

[0002] Gantry cranes, renowned for their unique portal-shaped metal structure, feature legs beneath their main beam, allowing them to move freely on ground rails. Extended cantilever beams are often installed at both ends of the main beam, effectively widening the working range. These cranes are widely used in outdoor freight yards, material yards, and bulk cargo loading and unloading operations, such as in ports, docks, power plants, and railway freight stations. They are also suitable for large equipment hoisting projects, even those requiring a certain width of space. Gantry cranes exhibit high site utilization, wide operating capacity, broad adaptability, and strong versatility. The rail-based hoisting structure reduces malfunctions, and electric drive lowers maintenance costs. The fixed rails, combined with the trolley positioning device, ensure a high level of automation and excellent overall performance.

[0003] In order to achieve stability during operation, existing cranes often use two electric hoists spaced at a fixed distance. However, this design limits the flexibility and adaptability of lifting operations because the fixed distance between the hoists cannot be precisely adjusted according to the actual size of the goods. For goods of different sizes, operators may need to frequently change electric hoists of different specifications or adjust the entire crane structure, which undoubtedly increases the complexity and time cost of operation. More seriously, when the size of the goods does not match the distance between the electric hoists, the stability of the goods during lifting is difficult to guarantee, and there is a risk of the goods tilting or falling. This not only damages the goods but may also pose a serious threat to operators and the surrounding environment, creating a significant safety hazard for lifting operations. Therefore, how to improve crane design to enhance the flexibility and safety of lifting operations is an urgent problem to be solved. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a gantry crane with the advantage of facilitating the adjustment of the distance between two electric hoists.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gantry crane, including a gantry frame, a limiting frame fixedly installed at the bottom of the gantry frame, a sliding groove opened inside the limiting frame, a sleeve block movably installed inside the sliding groove, two sleeve blocks having a double-acting screw threadedly connected inside, and both ends of the double-acting screw thread passing through the inside of the limiting frame, a first gear fixedly installed at one end of the double-acting screw thread, a motor fixedly installed on the right side of the limiting frame, a second gear fixedly installed at the output end of the motor, and the second gear meshing with the first gear, and an electric hoist fixedly installed at the bottom of the sleeve block.

[0006] As a preferred embodiment of this utility model, a support plate is fixedly installed at the bottom of the gantry frame, a first column is movably installed inside the support plate, a fixing plate is fixedly installed at the top of the two first columns, a screw is threaded into the internal thread of the bidirectional lead screw, one end of the screw is movably installed inside the support plate, a turntable is fixedly installed at the other end of the screw, a handle is fixedly installed on the outer surface of the turntable, and the handle is arranged in a circular array, a base is fixedly installed at the bottom of the first column of the turntable, a second column is fixedly installed at the bottom of the support plate, and a caster wheel is hinged to the bottom of the second column.

[0007] As a preferred embodiment of this utility model, a fixed base is fixedly installed on the outer side of the gantry frame, a fixed block is movably installed inside the fixed base, and a toolbox is fixedly installed on the right side of the fixed block.

[0008] As a preferred embodiment of this utility model, a support base is fixedly installed on the left side of the limiting frame, and the interior of the support base presents a U-shaped form.

[0009] As a preferred embodiment of this utility model, an installation plate is fixedly installed on the outer side of the electric hoist, and an alarm light is fixedly installed on the bottom of the installation plate.

[0010] As a preferred embodiment of this utility model, a telescopic rod is fixedly installed between the sleeve block and the limiting frame, and a sensor is fixedly installed on the outer surface of the telescopic rod.

[0011] As a preferred embodiment of this utility model, the inner diameter of the fixing seat is equal to the outer diameter of the fixing block, and the interior of the fixing seat has a smooth surface design.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. Compared with traditional cranes, this utility model improves the flexibility of lifting operations by adjusting the distance between two electric hoists through the cooperation of a sleeve block and a double-acting screw. This adjustment method allows for precise adjustment of the electric hoist spacing according to the size of the goods, easily meeting various lifting needs and demonstrating high adaptability and flexibility. At the same time, the precise electric hoist spacing ensures the stability of the goods during the lifting process, effectively reducing the risk of goods tilting or falling due to improper spacing, and significantly enhancing the safety of lifting operations. In addition, this adjustment method does not require changing the limit frame specifications or adjusting the crane structure. With just a simple adjustment of the sleeve block and the double-acting screw, it can quickly adapt to different lifting scenarios, thereby optimizing overall work efficiency and demonstrating significant operational convenience and efficiency.

[0014] 2. Compared with traditional cranes, this utility model facilitates the movement of the gantry frame through the cooperation between the second column and the casters. The mobility of the gantry frame allows the crane to quickly switch between different work areas, thereby significantly improving work efficiency. The cooperation between the screw and the base facilitates the slow descent of the first column and the base to support the gantry frame, ensuring stability and safety during operation and further promoting efficiency. In addition, the height and position of the gantry frame can be flexibly adjusted according to actual needs, making it adaptable to various complex working environments and different material handling requirements, demonstrating strong adaptability. The easily movable gantry frame reduces dependence on fixed infrastructure, reducing construction and maintenance costs, while the flexible support structure makes the crane more energy-efficient and effective during use. Attached Figure Description

[0015] Figure 1 This is a frontal three-dimensional appearance structural diagram of the present utility model;

[0016] Figure 2 This is a top-view three-dimensional structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the universal wheel structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the limiting frame of this utility model;

[0019] Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle;

[0020] Figure 6 This is a schematic diagram of the mounting plate structure of this utility model;

[0021] Figure 7 This utility model Figure 6 Enlarged structural diagram at point B;

[0022] Figure 8 This is a schematic diagram of the electric hoist structure of this utility model.

[0023] In the diagram: 1. Gantry frame; 2. Limit frame; 3. Electric hoist; 4. Support plate; 5. Screw; 6. Motor; 7. Support base; 8. Mounting plate; 9. Alarm light; 10. First column; 11. Base; 12. Fixing plate; 13. Second column; 14. Caster wheel; 15. Fixing base; 16. Fixing block; 17. Toolbox; 18. First gear; 19. Second gear; 20. Double-acting lead screw; 21. Sleeve block; 22. Telescopic rod; 23. Sensor; 24. Slide groove; 25. Turntable; 26. Handle. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figures 1 to 8 As shown, this utility model provides a gantry crane, including a gantry frame 1. A limit frame 2 is fixedly installed at the bottom of the gantry frame 1. A sliding groove 24 is opened inside the limit frame 2. A sleeve block 21 is movably installed inside the sliding groove 24. A double-acting screw 20 is threaded inside the two sleeve blocks 21, and both ends of the double-acting screw 20 pass through the inside of the limit frame 2. A first gear 18 is fixedly installed at one end of the double-acting screw 20. A motor 6 is fixedly installed on the right side of the limit frame 2. A second gear 19 is fixedly installed at the output end of the motor 6, and the second gear 19 meshes with the first gear 18. An electric hoist 3 is fixedly installed at the bottom of the sleeve block 21.

[0026] The staff needs to adjust the distance between the two electric hoists 3 according to the size of the hoisted goods. Now, the motor 6 is turned on, which drives the second gear 19 to rotate. The teeth of the second gear 19 mesh with the first gear 18, and the second gear 19 drives the first gear 18 to rotate. The first gear 18 drives the double-acting screw 20 to rotate inside the two sleeve blocks 21, so that the sleeve blocks 21 slowly move closer to the outside of the hoisted goods in the slide 24. The sleeve blocks 21 drive the sensor 23 to move synchronously until the hoisted goods are moved to the appropriate position, thus completing the adjustment of the distance between the two electric hoists 3.

[0027] By adjusting the distance between the two electric hoists 3 to accommodate different sizes of goods to be hoisted, the motor 6 is started to drive the second gear 19 to rotate. The second gear 19 meshes with the first gear 18, driving the first gear 18 to rotate, which in turn drives the double-acting screw 20 to rotate inside the sleeve block 21. This process causes the sleeve block 21 to slowly move along the slide groove 24 towards the outside of the goods to be hoisted. Simultaneously, the sleeve block 21 drives the sensor 23 to move synchronously until the position is adjusted to suit the goods to be hoisted, thus completing the precise adjustment of the distance between the two electric hoists 3. Compared with traditional cranes, this crane adjusts the distance between the two electric hoists 3 through the cooperation of the sleeve block 21 and the double-acting screw 20. This greatly enhances the flexibility of hoisting operations. This adjustment method allows the spacing of the electric hoists 3 to be precisely adjusted according to the size of the goods, easily meeting various hoisting needs and demonstrating a high degree of adaptability and flexibility. At the same time, the precise spacing of the electric hoists 3 ensures the stability of the goods during the hoisting process, effectively reducing the risk of goods tilting or falling due to improper spacing, and significantly enhancing the safety of hoisting operations. In addition, this adjustment method does not require changing the specifications of the limit frame 2 or adjusting the crane structure. With just a simple adjustment of the sleeve block 21 and the double-acting screw 20, it can quickly adapt to different hoisting scenarios, thereby optimizing the overall work efficiency and demonstrating significant operational convenience and efficiency.

[0028] Among them, the bottom of the gantry frame 1 is fixedly installed with a support plate 4, the inside of the support plate 4 is movably installed with a first column 10, the top of the two first columns 10 is fixedly installed with a fixing plate 12, the internal thread of the double-acting screw 20 is threaded with a screw 5, one end of the screw 5 is movably installed inside the support plate 4, the other end of the screw 5 is fixedly installed with a turntable 25, the outer surface of the turntable 25 is fixedly installed with a handle 26, and the handle 26 is in the form of a circumferential array. The bottom of the first column 10 is fixedly installed with a base 11, the bottom of the support plate 4 is fixedly installed with a second column 13, and the bottom of the second column 13 is hinged with a caster wheel 14.

[0029] After the workers move the gantry frame 1 to the designated position using the cooperation between the second column 13 and the casters 14, the gantry frame 1 needs to be supported. By rotating the handle 26, the workers drive the turntable 25 to rotate, which in turn drives the internal rotation of the screw 5, causing the fixing plate 12 to slowly descend. The fixing plate 12 then drives the two first columns 10 to slowly descend, and the base 11 drives the first columns 10 to slowly descend until they are level with the casters 14. At this point, the turntable 25 and the handle 26 stop rotating, and the base 11 supports the gantry frame 1, thus completing the movement and support of the gantry frame 1.

[0030] After the gantry frame 1 is moved to the designated position by the cooperation between the second column 13 and the caster wheel 14, the gantry frame 1 needs to be supported. The handle 26 is rotated by the hand, which drives the turntable 25 to rotate. The turntable 25 drives the screw 5 to rotate, causing the fixing plate 12 to slowly descend. The fixing plate 12 drives the two first columns 10 to slowly descend, and the base 11 drives the first columns 10 to slowly descend until they are level with the caster wheel 14. At this time, the turntable 25 and the handle 26 stop rotating, and the base 11 supports the gantry frame 1, thus completing the movement and support of the gantry frame 1. Compared to traditional cranes, the cooperation between the second column 13 and the casters 14 facilitates the movement of the gantry frame. This mobility allows the crane to quickly switch between different work areas, significantly improving operational efficiency. The cooperation between the screw 5 and the base 11 facilitates the slow descent of the first column 10 and the base 11 to support the gantry frame 1, ensuring stability and safety during operation and further enhancing efficiency. In addition, the height and position of the gantry frame 1 can be flexibly adjusted according to actual needs, enabling it to adapt to various complex working environments and different material handling requirements, demonstrating strong adaptability. The easily movable gantry frame 1 reduces reliance on fixed infrastructure, decreasing construction and maintenance costs, while the flexible support structure makes the crane more energy-efficient during use.

[0031] Among them, a fixed base 15 is fixedly installed on the outer side of the gantry frame 1, a fixed block 16 is movably installed inside the fixed base 15, and a toolbox 17 is fixedly installed on the right side of the fixed block 16.

[0032] By holding the toolbox 17, the fixing block 16 is slowly placed into the fixing seat 15. The fixing seat 15 limits and fixes the fixing block 16. By adding the toolbox 17, it is convenient for the staff to take out and put the maintenance tools inside the toolbox 17.

[0033] The left side of the limiting frame 2 is fixedly equipped with a support base 7, and the inside of the support base 7 has a U-shaped form.

[0034] Because the inside of the support base 7 is U-shaped on the left side of the limit frame 2, the support base 7 can easily support the motor 6, ensuring the stability of the motor 6 during use and improving the efficiency of the motor 6 during operation.

[0035] Among them, an installation plate 8 is fixedly installed on the outside of the electric hoist 3, and an alarm light 9 is fixedly installed on the bottom of the installation plate 8.

[0036] The alarm light 9 is supported by the mounting plate 8 on the outside of the electric hoist 3. When the electric hoist 3 moves downward, the alarm light 9 is turned on to alert the surrounding workers, ensuring the installation is safe for workers on site and preventing accidents.

[0037] A telescopic rod 22 is fixedly installed between the sleeve block 21 and the limiting frame 2, and a sensor 23 is fixedly installed on the outer surface of the telescopic rod 22.

[0038] The telescopic rod 22 and the sensor 23 are moved synchronously by the sleeve block 21. The distance between the two electric hoists 3 is detected by the sensor 23. When the two electric hoists 3 cannot meet the distance of the goods or the position of the hoisted goods, and there is a large deviation, feedback is given and the sensor 23 will directly alarm.

[0039] The inner diameter of the fixing seat 15 is equal to the outer diameter of the fixing block 16, and the interior of the fixing seat 15 has a smooth surface design.

[0040] Since the inner diameter of the fixing base 15 is equal to the outer diameter of the fixing block 16, and the interior of the fixing base 15 has a smooth surface design, the worker can hold the toolbox 17 and put the fixing block 16 into the interior of the fixing base 15, which facilitates the installation of the toolbox 17 and ensures the installation efficiency of the toolbox 17.

[0041] Working principle and usage process of this utility model:

[0042] After the workers move the gantry frame 1 to the designated position using the cooperation between the second column 13 and the casters 14, the gantry frame 1 needs to be supported. By rotating the handle 26, the workers drive the turntable 25 to rotate, which in turn drives the internal rotation of the screw 5, causing the fixing plate 12 to slowly descend. The fixing plate 12 then drives the two first columns 10 to slowly descend, and the base 11 drives the first columns 10 to slowly descend until they are level with the casters 14. At this point, the turntable 25 and the handle 26 stop rotating, and the base 11 supports the gantry frame 1, thus completing the movement and support of the gantry frame 1.

[0043] The staff needs to adjust the distance between the two electric hoists 3 according to the size of the hoisted goods. Now, the motor 6 is turned on, which drives the second gear 19 to rotate. The teeth of the second gear 19 mesh with the first gear 18, and the second gear 19 drives the first gear 18 to rotate. The first gear 18 drives the double-acting screw 20 to rotate inside the two sleeve blocks 21, so that the sleeve blocks 21 slowly move closer to the outside of the hoisted goods in the slide 24. The sleeve blocks 21 drive the sensor 23 to move synchronously until the hoisted goods are moved to the appropriate position, thus completing the adjustment of the distance between the two electric hoists 3.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gantry crane, comprising a gantry frame (1), characterized in that: A limiting frame (2) is fixedly installed at the bottom of the gantry frame (1). A sliding groove (24) is provided inside the limiting frame (2). A sleeve block (21) is movably installed inside the sliding groove (24). A two-way screw rod (20) is threaded inside the two sleeve blocks (21), and both ends of the two-way screw rod (20) pass through the inside of the limiting frame (2). A first gear (18) is fixedly installed at one end of the two-way screw rod (20). A motor (6) is fixedly installed on the right side of the limiting frame (2). A second gear (19) is fixedly installed at the output end of the motor (6), and the second gear (19) meshes with the first gear (18). An electric hoist (3) is fixedly installed at the bottom of the sleeve block (21).

2. A gantry crane according to claim 1, characterized in that: A support plate (4) is fixedly installed at the bottom of the gantry frame (1). A first column (10) is movably installed inside the support plate (4). A fixing plate (12) is fixedly installed at the top of the two first columns (10). A screw (5) is threaded inside the double-acting screw (20). One end of the screw (5) is movably installed inside the support plate (4). A turntable (25) is fixedly installed at the other end of the screw (5). A handle (26) is fixedly installed on the outer surface of the turntable (25). The handle (26) is arranged in a circular array. A base (11) is fixedly installed at the bottom of the first column (10). A second column (13) is fixedly installed at the bottom of the support plate (4). A universal wheel (14) is hinged to the bottom of the second column (13).

3. A gantry crane according to claim 1, characterized in that: A fixing seat (15) is fixedly installed on the outside of the gantry frame (1), and a fixing block (16) is movably installed inside the fixing seat (15). A toolbox (17) is fixedly installed on the right side of the fixing block (16).

4. A gantry crane according to claim 1, characterized in that: A support base (7) is fixedly installed on the left side of the limiting frame (2), and the inside of the support base (7) presents a U-shaped form.

5. A gantry crane according to claim 1, characterized in that: An installation plate (8) is fixedly installed on the outside of the electric hoist (3), and an alarm light (9) is fixedly installed on the bottom of the installation plate (8).

6. A gantry crane according to claim 1, characterized in that: A telescopic rod (22) is fixedly installed between the sleeve block (21) and the limiting frame (2), and a sensor (23) is fixedly installed on the outer surface of the telescopic rod (22).

7. A gantry crane according to claim 3, characterized in that: The inner diameter of the fixing seat (15) is equal to the outer diameter of the fixing block (16), and the interior of the fixing seat (15) has a smooth surface design.

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