A cross-beam foldable long-distance adjustable gantry crane and a folding adjustment method thereof

Abstract

The present application relates to container lifting equipment technical field, specifically a kind of folding long-distance adjustment of portal crane of cross beam and its folding adjusting method, comprising: base, fixed piece and multiple groups of first roller are provided on base;Telescopic arm group, vertically installed on base, one group of telescopic arm group is connected with first cross beam, another group of telescopic arm group is connected with second cross beam, and electric hook group is provided on first cross beam and second cross beam;Side frame, first supplementary block and multiple groups of second supplementary block capable of lifting are provided on side frame, and first supplementary block is connected with fourth electric telescopic rod arranged on side frame;Remote control system, remote control system is communicated with telescopic arm group, first roller, electric hook group, fourth electric telescopic rod, so that electric hook group is more stable when lifting goods and transverse moving.

Description

Technical Field

[0001] This invention relates to the field of container lifting equipment technology, specifically a gantry crane with a foldable and remotely adjustable span beam and its folding and adjustment method. Background Technology

[0002] Port container operations require gantry cranes to have maximum lateral span under rated ultimate load to cover multiple rows of containers at once, improving ship operating efficiency. Simultaneously, remote positioning and control enable convenient remote operation. Therefore, traditional solutions design the main beam with a fixed span and determine the structural cross-section based on the maximum lifting capacity. As a result, the entire gantry crane remains in a "maximum footprint" state year-round, constantly occupying the bottleneck area of ​​the yard. It cannot be retracted during ship operation breaks, and even when shunting without load, the same width of ground track and safety clearance must be reserved, thus failing to improve the land utilization rate of the yard.

[0003] To alleviate this contradiction, a telescopic beam structure with interlocking mechanism has emerged in recent years: the inner and outer beams interlock and slide by hydraulic cylinders or gear racks to achieve variable span. However, due to the geometric limitations of the box girder itself, the diameter of the outer beam is larger than that of the inner beam, resulting in a sharp decrease in the cross-sectional height of the area where the outer beam connects to the inner beam, forming a significant step difference. When the electric trolley passes through this area, the wheels become unstable instantly, generating a vertical impact. This impact is amplified into an instantaneous dynamic load through the spreader wire rope. After being superimposed on the container, the peak tension of the traction rope increases sharply. After repeated action, the rope core experiences micro-bending fatigue, and the outer steel wires undergo misalignment and wear. The crack propagation rate is much higher than that of ordinary bending fatigue conditions. In extreme cases, it can break within weeks, posing a significant safety hazard.

[0004] Of course, in recent years, there has also been a "parallel track" process that attempts to arrange a pair of coplanar but horizontally misaligned tracks between the inner and outer beams so that the trolley wheels always fall on the same plane to avoid the occurrence of step differences. However, when switching tracks, the upward support torques on the wheels are significantly different, causing the shaft to fatigue and deform. After long-term operation, this can lead to increased rail wear or even derailment and fall of the trolley, and the risk has not been eliminated. Summary of the Invention

[0005] The purpose of this invention is to provide a foldable, remotely adjustable gantry crane with a span beam and a folding and adjustment method thereof, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A foldable, remotely adjustable gantry crane with a spanning beam, comprising:

[0008] The base is provided in two sets, and the base is provided with a fixing component and multiple sets of first rollers;

[0009] The telescopic boom assembly consists of two sets, each vertically mounted on the base. One set of the telescopic boom assembly is connected to a first crossbeam, and the other set is connected to a second crossbeam. Electric hook assemblies are installed on the first and second crossbeams.

[0010] A side frame is connected to the first crossbeam and the second crossbeam. The side frame is equipped with a first supplementary block that can be raised and lowered and multiple sets of second supplementary blocks. The first supplementary block is connected to a fourth electric telescopic rod installed on the side frame. When the first crossbeam and the second crossbeam move a predetermined distance relative to each other, the first supplementary block and the corresponding number of second supplementary blocks can connect the first crossbeam and the second crossbeam so that the electric hook assembly can move between the first crossbeam and the second crossbeam.

[0011] The remote control system communicates with the telescopic boom assembly, the first roller, the electric hook assembly, and the fourth electric telescopic rod.

[0012] The foldable and remotely adjustable gantry crane with spanning beams as described above: the telescopic boom assembly includes a connecting arm fixedly installed perpendicular to the base and a lifting arm slidably connected to the connecting arm, the lifting arm being connected to the first crossbeam or the second crossbeam;

[0013] The telescopic arm assembly also includes horizontal plates respectively installed on the first crossbeam and the second crossbeam. The two sets of horizontal plates are connected by multiple sets of folding hinge structures, wherein a second electric telescopic rod is provided between the two sets of folding hinge structures.

[0014] The foldable and remotely adjustable gantry crane with span beams as described above: two adjacent sets of the folding hinge structures are connected by two sets of second connecting pins;

[0015] The folding hinge structure includes a first hinge rod and a second hinge rod that are rotatably connected by a first connecting pin;

[0016] In the two sets of folding hinge structures located at the ends, one end of the first hinge rod is rotatably mounted with a grooved wheel, which is in rolling connection with a horizontal groove on the horizontal plate, and one end of the second hinge rod is rotatably connected to a connecting shaft on the horizontal plate.

[0017] The foldable and remotely adjustable gantry crane with cross beams as described above: the side frame is fixedly installed on the second cross beam, and a guide frame is detachably installed on the end of the side frame away from the second cross beam. Multiple sets of pressure rollers are rotatably installed on the guide frame, and the pressure rollers are adapted to the rolling motion of the first cross beam.

[0018] A third electric telescopic rod is also fixed to one end of the side frame, and the actuating end of the third electric telescopic rod is fixedly connected to the first crossbeam.

[0019] The foldable and remotely adjustable gantry crane with crossbeams as described above: the first crossbeam is provided with a first locking block and a first groove, and the second crossbeam is provided with a first locking groove and a first protrusion;

[0020] The lower ends of the first and second crossbeams on opposite sides are provided with support parts.

[0021] The foldable and remotely adjustable gantry crane with span beams as described above: the structure of the second supplementary block is the same as that of the first supplementary block, and a support portion is provided on the top of the second supplementary block facing the side of the first supplementary block.

[0022] The foldable and remotely adjustable gantry crane with span beams as described above: one end of the first supplementary block is provided with a second locking block and a second groove, the second locking block is adapted to the first locking groove, and the second groove is adapted to the first protrusion;

[0023] The other end of the first supplementary block is provided with a second locking groove and a second protrusion, which are adapted to the second supplementary block and the first crossbeam.

[0024] The bottom sides of the first supplementary block and the second supplementary block are provided with abutment portions, which abut and fit with the support portion.

[0025] The foldable and remotely adjustable gantry crane with span beams as described above: both the first supplementary block and the second supplementary block are provided with sliding connection parts on their sides, and the guides provided on the side of the side frame are slidably connected to the sliding connection parts.

[0026] The foldable and remotely adjustable gantry crane with span beams as described above: a bracket is slidably mounted on one of the bases, and a second roller is rotatably mounted on the bracket, the axis of rotation of the second roller being perpendicular to the axis of rotation of the first roller;

[0027] A first electric telescopic rod is fixedly installed on the bracket, and the actuating end of the first electric telescopic rod is fixedly connected to the base.

[0028] A folding and adjustment method for a foldable, remotely adjustable gantry crane with a span beam as described above includes the following steps:

[0029] Step 1: Use fasteners to lift one set of bases until they are separated from the track;

[0030] Step 2: By controlling the action of the fourth electric telescopic rod, the first supplementary block is separated from the first crossbeam and the second crossbeam;

[0031] Step 3: The third electric telescopic rod and the external drive structure synchronously drive the telescopic arm assembly on one side to move until the first crossbeam and the second crossbeam move away from each other by a predetermined distance;

[0032] Step 4: The fourth electric telescopic rod drives the first supplementary block to move toward the first crossbeam and the second crossbeam. At this time, the first supplementary block and the corresponding number of second supplementary blocks are connected to the first crossbeam and the second crossbeam.

[0033] Step 5: Control the second electric telescopic rod to activate the folding hinge structure and drive the lifting arm to move relative to the connecting arm, adjusting the height of the first and second crossbeams.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] By setting up a first crossbeam, a second crossbeam, a first supplementary block, and a second supplementary block, the connection between the first and second supplementary blocks and the first and second crossbeams ensures that the bottom flanges of the first and second supplementary blocks are coplanar, guaranteeing sufficient smoothness of the electric hook assembly during lateral movement. Simultaneously, the connection between the first and second supplementary blocks and the first and second crossbeams can counteract the bending deformation of the first and second crossbeams caused by stress, further ensuring the smoothness of the electric hook assembly during lateral movement. This ensures constant force on the traction rope during container lifting, improving safety and stability during lifting.

[0036] By using a telescopic boom assembly, the final lifting range can be multiplied without increasing the single-stage stroke. This significantly reduces the stroke requirement and cylinder length of the second electric telescopic boom, making the overall structure more compact, lighter, and more energy-efficient. At the same time, the multi-stage articulated synchronous extension provides better lateral stability and resistance to off-center loads, avoiding the problems of boom bending, seal wear, and lifting vibration caused by long strokes in traditional single-stage direct-drive solutions. As a result, it achieves a smaller installation space, higher operational reliability, and longer service life at the same lifting height. Attached Figure Description

[0037] Figure 1 This is a structural schematic diagram of a foldable, remotely adjustable gantry crane with spanning beams.

[0038] Figure 2 This is a structural diagram of the first crossbeam, second crossbeam, side frame, second supplementary block, and third electric telescopic rod in a foldable and remotely adjustable gantry crane with span beams.

[0039] Figure 3 This is a schematic diagram of the structure of a gantry crane with a foldable and remotely adjustable crossbeam after one side of the side frame has been removed.

[0040] Figure 4 This is a schematic diagram of the guide frame and pressure rollers in a foldable and remotely adjustable gantry crane with spanning beams.

[0041] Figure 5This is a structural diagram of the first crossbeam, the second crossbeam, and the first supplementary block in a foldable and remotely adjustable gantry crane with span beams.

[0042] Figure 6 This is a structural diagram of the first and second supplementary blocks in a foldable, remotely adjustable gantry crane with a span beam.

[0043] Figure 7 This is a structural diagram of the first and second supplementary blocks at another angle in a foldable and remotely adjustable gantry crane with spanning beams.

[0044] Figure 8 This is a structural diagram of a gantry crane with a foldable and remotely adjustable crossbeam, showing the first and second crossbeams combined with the first supplementary block or the first and second supplementary blocks.

[0045] Figure 9 This is a structural diagram of the telescopic boom assembly in a gantry crane with a foldable and remotely adjustable span beam.

[0046] Figure 10 This is an exploded view of the folding hinge structure in a foldable, remotely adjustable gantry crane with a span beam.

[0047] In the diagram: 1. Base; 2. First roller; 3. Connecting arm; 4. Lifting arm; 5. Second roller; 6. Bracket; 7. First electric telescopic rod; 8. Fixing component; 9. Horizontal plate; 901. Horizontal groove; 10. Grooved wheel; 11. Connecting shaft; 12. First hinge rod; 13. Second hinge rod; 14. First connecting pin; 15. Second connecting pin; 16. Side plate; 17. Second electric telescopic rod; 18. First crossbeam; 1801. First locking block; 1802. First groove; 19. Second crossbeam; 1901, First locking groove; 1902, First protrusion; 20, First supplementary block; 2001, Second locking block; 2002, Second locking groove; 2003, Second groove; 2004, Second protrusion; 2005, Abutment part; 2006, Sliding connection part; 21, Support part; 22, Second supplementary block; 23, Support part; 24, Side frame; 25, Third electric telescopic rod; 26, Guide member; 27, Guide frame; 28, Pressure roller; 29, Fourth electric telescopic rod; 30, Electric hook assembly. Detailed Implementation

[0048] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0049] Please see Figures 1-10 As an embodiment of the present invention, the foldable and remotely adjustable gantry crane includes: a base 1, a telescopic boom assembly, a side frame 24, and a remote control system.

[0050] The base 1 is provided with two sets, and the base 1 is provided with a fixing member 8 and multiple sets of first rollers 2. The rotating shaft of the first roller 2 is connected to a first drive motor (not shown in the figure) provided on the base 1. The first drive motor can drive the first roller 2 to move along the track, so that when the electric hook group 30 lifts the container, the container can move along the length direction of the track.

[0051] The telescopic boom assembly consists of two sets, each vertically mounted on the base 1. One set of the telescopic boom assembly is connected to a first crossbeam 18, and the other set is connected to a second crossbeam 19. Electric hook assemblies 30 are mounted on the first crossbeam 18 and the second crossbeam 19. The electric hook assemblies 30 can move along the length of the first crossbeam 18 and the second crossbeam 19, which, in conjunction with the first roller 2 moving along the length of the track, enables the container lifted by the electric hook assemblies 30 to be moved horizontally to meet transportation needs.

[0052] The telescopic arm assembly includes a connecting arm 3 fixedly installed perpendicular to the base 1 and a lifting arm 4 slidably connected to the connecting arm 3. The lifting arm 4 is connected to the first crossbeam 18 or the second crossbeam 19.

[0053] The telescopic boom assembly also includes transverse plates 9 respectively mounted on the first crossbeam 18 and the second crossbeam 19. The two sets of transverse plates 9 are connected by multiple sets of folding hinge structures. A second electric telescopic rod 17 is provided between the two sets of folding hinge structures. The second electric telescopic rod 17 drives the folding hinge structure to move, which can drive the lifting boom 4 to slide relative to the connecting arm 3, thereby achieving the purpose of adjusting the height of the lifting boom 4. At this time, the height of the first crossbeam 18 and the second crossbeam 19 will change accordingly, so that the initial height of the electric hook assembly 30 can be adjusted to meet the lifting requirements of containers of different sizes.

[0054] The two adjacent sets of folding hinge structures are connected by two sets of second connecting pins 15;

[0055] The folding hinge structure includes a first hinge rod 12 and a second hinge rod 13 that are rotatably connected by a first connecting pin 14;

[0056] In the two sets of folding hinge structures located at the ends, one end of the first hinge rod 12 is rotatably mounted with a grooved wheel 10, the grooved wheel 10 is rollingly connected to the horizontal groove 901 provided on the horizontal plate 9, and one end of the second hinge rod 13 is rotatably connected to the connecting shaft 11 provided on the horizontal plate 9.

[0057] Specifically, the first hinge rod 12 and the second hinge rod 13 on the same set of folding hinge structures are rotatably connected by the first connecting pin 14, while the ends of the first hinge rod 12 and the second hinge rod 13 on two adjacent sets of folding hinge structures are rotatably connected by the second connecting pin 15. This allows multiple sets of folding hinge structures to form a scissor mechanism. A side plate 16 is provided on the first connecting pin 14 of one set of folding hinge structures. The side plate 16 is fixedly connected to the second electric telescopic rod 17. At the same time, the actuating end of the second electric telescopic rod 17 is connected to the first connecting pin 14 on the folding hinge structure adjacent to this set of folding hinge structures. When the first connecting pins 14 on these two sets of adjacent folding hinge structures move away from each other, they will move away from each other along with the two sets of first connecting pins 14 on the two adjacent sets of folding hinge structures. When the second electric telescopic rod 17 extends to a predetermined length, the distance by which the two sets of transverse plates 9 move away from each other is equal to an integer multiple of the predetermined length, thereby increasing the effective stroke of the lifting arm 4 relative to the connecting arm 3.

[0058] For example, when the extension of the second electric telescopic rod 17 is N and the number of folding hinge structures is X, the total height of the lifting arm 4 relative to the connecting arm 3 is NX. This ensures that the lifting height of the lifting arm 4 is effectively increased while shortening the extension of the second electric telescopic rod 17. Compared to the prior art where the second electric telescopic rod 17 directly drives the lifting arm 4 to rise, under the condition that the extension of the second electric telescopic rod 17 is only N and the number of folding hinge structures is X, the lifting arm 4 can accumulate a certain height relative to the connecting arm 3. The NX's net lifting height allows for a significant increase in the final lifting range without increasing the single-stage stroke. This significantly reduces the stroke requirements and cylinder length of the second electric telescopic mast 17, resulting in a more compact structure, lighter weight, and lower energy consumption. Furthermore, the multi-stage articulated synchronous extension provides better lateral stability and resistance to off-center loads, avoiding the problems of mast bending, seal wear, and lifting vibration caused by long strokes in traditional single-stage direct-drive solutions. Consequently, it achieves a smaller installation space, higher operational reliability, and longer service life at the same lifting height.

[0059] Please see Figures 3-4 The side frame 24 is connected to the first crossbeam 18 and the second crossbeam 19. The side frame 24 is provided with a first supplementary block 20 that can be raised and lowered and multiple sets of second supplementary blocks 22. The first supplementary block 20 is connected to a fourth electric telescopic rod 29 provided on the side frame 24. When the first crossbeam 18 and the second crossbeam 19 move relative to each other by a predetermined distance, the first supplementary block 20 and the corresponding number of second supplementary blocks 22 can connect the first crossbeam 18 and the second crossbeam 19 so that the electric hook assembly 30 can move between the first crossbeam 18 and the second crossbeam 19.

[0060] The side frame 24 is fixedly installed on the second crossbeam 19, and a guide frame 27 is detachably installed on the end of the side frame 24 away from the second crossbeam 19. Multiple sets of pressure rollers 28 are rotatably installed on the guide frame 27, and the pressure rollers 28 are adapted to roll with the first crossbeam 18.

[0061] One end of the side frame 24 is also fixed with a third electric telescopic rod 25, and the actuating end of the third electric telescopic rod 25 is fixedly connected to the first crossbeam 18.

[0062] In this application, the cross-sections of the first crossbeam 18 and the second crossbeam 19 are I-shaped, while the internal structure of the guide frame 27 is T-shaped. The guide frame 27 can be fitted onto the second crossbeam 19. By providing a pressure roller 28 on the guide frame 27, the connection stability between the two can be ensured when the second crossbeam 19 moves relative to the guide frame 27. This avoids axial misalignment between the first crossbeam 18 and the second crossbeam 19 when they move away from each other, ensuring that the subsequent first supplementary block 20 and second supplementary block 22 can be smoothly placed between them.

[0063] Furthermore, a bracket 6 is slidably mounted on one of the bases 1, and a second roller 5 is rotatably mounted on the bracket 6, the axis of rotation of the second roller 5 being perpendicular to the axis of rotation of the first roller 2;

[0064] A first electric telescopic rod 7 is fixedly installed on the bracket 6, and the actuating end of the first electric telescopic rod 7 is fixedly connected to the base 1.

[0065] When it is necessary to adjust the distance between two adjacent telescopic boom groups to increase the lateral span of the electric hook group 30, the fixing member 8 on the base 1 without the bracket 6 is activated, lifting the first roller 2 on that base 1. At this time, the base 1 is fixed to the ground. Simultaneously, the first electric telescopic rod 7 on the other base 1 is activated, driving the bracket 6 towards the ground until the second roller 5 lifts the base 1 and separates the first roller 2 connecting the base 1 from the ground. At this time, the third electric telescopic rod 25 moves synchronously and at the same speed as the external drive structure, causing the base 1 and the parts connected to it to move towards the ground. The first crossbeam 18 can move away from the other set of bases 1 and the second crossbeam 19, preventing uneven force on the first crossbeam 18 and base 1 in the presence of a single drive mode, which could cause deformation of the lifting arm 4 and connecting arm 3 due to stress. This protects the structural integrity of the lifting arm 4 and connecting arm 3. On the one hand, it can reduce the resistance of the relative sliding of the lifting arm 4 and the connecting arm 3. On the other hand, it can prevent axial misalignment between the first crossbeam 18 and the second crossbeam 19, ensuring that the first supplementary block 20 and the second supplementary block 22 can be smoothly placed between the first crossbeam 18 and the second crossbeam 19.

[0066] Please see Figure 3 , Figure 5 The first crossbeam 18 is provided with a first locking block 1801 and a first groove 1802, and the second crossbeam 19 is provided with a first locking groove 1901 and a first protrusion 1902.

[0067] A support portion 21 is provided at the lower end of the opposite side of the first crossbeam 18 and the second crossbeam 19;

[0068] The structure of the second supplementary block 22 is the same as that of the first supplementary block 20, and the top of the second supplementary block 22 facing the first supplementary block 20 is provided with a support portion 23. The sides of the first supplementary block 20 and the second supplementary block 22 are provided with sliding connection portions 2006. The guide 26 provided on the side of the side frame 24 is slidably connected to the sliding connection portion 2006. The cooperation between the guide 26 and the sliding connection portion 2006 plays a guiding role for the first supplementary block 20 and the second supplementary block 22.

[0069] In this embodiment, in the initial state, only the first supplementary block 20 is located between the first crossbeam 18 and the second crossbeam 19. The cross-sections of the first supplementary block 20 and the second supplementary block 22 are also I-shaped and have the same cross-sectional size. In this state, the first crossbeam 18 and the second crossbeam 19 are connected by the first supplementary block 20. At the same time, the wing plate at the lower part of the first supplementary block 20 completely overlaps with the wing plates at the lower part of the first crossbeam 18 and the second crossbeam 19. In this state, when the electric hook assembly 30 lifts the container and moves laterally, the electric hook assembly 30 can smoothly switch between the first crossbeam 18 and the second crossbeam 19, avoiding the longitudinal step jump of the electric hook assembly 30 during lateral movement, which would cause the traction rope on the electric hook assembly 30 to be subjected to vertical impact, resulting in metal fatigue of the traction rope or even breakage.

[0070] When it is necessary to adjust the entire lateral distance, the first supplementary block 20 is first separated from the first crossbeam 18 and the second crossbeam 19 by the fourth electric telescopic rod 29, until the first supplementary block 20 abuts against the support part 23 on the adjacent second supplementary block 22, thereby lifting all the second supplementary blocks 22 (adjacent groups of second supplementary blocks 22 abut against each other through the support part 23). Then, the third electric telescopic rod 25 and the external drive structure move synchronously to make the first crossbeam 18 and the second crossbeam 19 move relative to each other until they move away from each other by a predetermined distance, at which point the corresponding number of second supplementary blocks 22 will be in a suspended state. It is connected to the adjacent second supplementary block 22 through the support part 23. At the same time, the second supplementary block 22 adjacent to the first supplementary block 20 is connected to the first supplementary block 20 through the support part 23. In this state, the fourth electric telescopic rod 29 drives the first supplementary block 20 to move in the opposite direction, so that all the second supplementary blocks 22 will also move towards the first crossbeam 18 until the first supplementary block 20 and the corresponding number of second supplementary blocks 22 move between the first crossbeam 18 and the second crossbeam 19, realizing the connection between the first crossbeam 18 and the second crossbeam 19. The remaining second supplementary blocks 22 will still be located on the upper part of the first crossbeam 18.

[0071] Based on the above settings, when the first crossbeam 18 and the second crossbeam 19 move away from each other by a predetermined length, thus changing the overall length of the crossbeams, the first supplementary block 20 and the corresponding number of second supplementary blocks 22 can connect the first crossbeam 18 and the second crossbeam 19, and ensure that the electric hook assembly 30 does not experience longitudinal step jumps during lateral movement, ensuring that the traction rope on the electric hook assembly 30 is under constant force, and improving the stability and safety during the container lifting process.

[0072] It should be noted that the first supplementary block 20 and the second supplementary block 22 have the same length, and the distance by which the first crossbeam 18 moves away from the second crossbeam 19 should be an integer multiple of the length of the first supplementary block 20 or the second supplementary block 22, so as to ensure that after the first crossbeam 18 moves a predetermined distance relative to the second crossbeam 19, the first supplementary block 20 and the corresponding number of second supplementary blocks 22 can smoothly enter between the first crossbeam 18 and the second crossbeam 19.

[0073] Please see Figures 5-7 One end of the first supplementary block 20 is provided with a second locking block 2001 and a second groove 2003. The second locking block 2001 is adapted to the first locking groove 1901, and the second groove 2003 is adapted to the first protrusion 1902.

[0074] The other end of the first supplementary block 20 is provided with a second locking groove 2002 and a second protrusion 2004, which are adapted to the second supplementary block 22 and the first crossbeam 18.

[0075] The bottom sides of the first supplementary block 20 and the second supplementary block 22 are provided with abutment portions 2005, which abut against and are adapted to the support portion 21.

[0076] In the initial state (when the first supplementary block 20 is connected to the first crossbeam 18 and the second crossbeam 19), the abutment part 2005 at the lower part of the first supplementary block 20 abuts against the support part 21 on the first crossbeam 18 and the second crossbeam 19, respectively. At this time, the wing plate at the lower part of the first supplementary block 20 is coplanar with the wing plates at the lower part of the first crossbeam 18 and the second crossbeam 19, so that no step jump will occur when the electric hook assembly 30 moves laterally, ensuring that the force on the traction rope is constant. At the same time, the second locking block 2001 is inserted into the first locking groove 190. In step 1, the first locking block 1801 is inserted into the second locking groove 2002, and the first protrusion 1902 is embedded in the second groove 2003 and the second protrusion 2004 is embedded in the first groove 1802. In this state, the first supplementary block 20 can counteract the bending of the first crossbeam 18 or the second crossbeam 19 due to force, thus playing a supporting role and ensuring the straightness of the first crossbeam 18, the second crossbeam 19 and the first supplementary block 20, further ensuring the smoothness of the electric hook assembly 30 during lateral movement.

[0077] When the connection between the first crossbeam 18 and the second crossbeam 19 includes a set of first supplementary blocks 20 and a set of second supplementary blocks 22, the supporting portion 23 on the second supplementary block 22 can abut against the first supplementary block 20. This allows the first supplementary block 20 to support the second supplementary block 22 when the abutting portion 2005 on one side of the first supplementary block 20 abuts against the supporting portion 21 on the second crossbeam 19. Conversely, the abutting portion 2005 on one side of the second supplementary block 22 will also abut against the supporting portion 21 on the first crossbeam 18. At this time, the flanges at the lower ends of the first supplementary block 20, the second supplementary block 22, the first crossbeam 18, and the second crossbeam 19 will all be in a coplanar state, ensuring that the electric hook assembly 30 is in a horizontal position. The smoothness of the transition is achieved by the second locking block 2001 and the second groove 2003 on the first supplementary block 20 cooperating with the first locking groove 1901 and the first protrusion 1902 on the second crossbeam 19, the second locking block 2001 and the second groove 2003 on the second supplementary block 22 cooperating with the second locking groove 2002 and the second protrusion 2004 on the first supplementary block 20, and the first locking block 1801 and the first groove 1802 on the first crossbeam 18 cooperating with the second locking groove 2002 and the second protrusion 2004 on the second supplementary block 22. This effectively counteracts the bending of the first crossbeam 18 or the second crossbeam 19 under stress, thereby further ensuring the straightness of the first crossbeam and the second crossbeam 18.

[0078] Based on the above principle, when the first supplementary block 20 and multiple sets of second supplementary blocks 22 are connected to the first crossbeam 18 and the second crossbeam 19, the straightness of the first crossbeam 18, the first supplementary block 20, the multiple sets of second supplementary blocks 22 and the second crossbeam 19 can be guaranteed, and the bending of the first crossbeam 18 and the second crossbeam 19 due to force can be offset.

[0079] Based on the above configuration, during the process of connecting the first supplementary block 20 and the second supplementary block 22 to the first crossbeam 18 and the second crossbeam 19, the coplanarity of the bottom flanges of the first supplementary block 20, the second supplementary block 22, the first crossbeam 18, and the second crossbeam 19 can be ensured, thus guaranteeing sufficient smoothness of the electric hook assembly 30 during lateral movement. At the same time, when the first supplementary block 20 and the second supplementary block 22 are connected to the first crossbeam 18 and the second crossbeam 19, they can offset the bending deformation of the first crossbeam 18 and the second crossbeam 19 caused by the force, further ensuring the smoothness of the electric hook assembly 30 during lateral movement, ensuring constant force on the traction rope during container lifting, and improving the safety and stability during lifting.

[0080] The remote control system communicates with the telescopic boom assembly, the first roller 2, the electric hook assembly 30, and the fourth electric telescopic rod 29, thereby realizing remote control of the gantry crane and improving the convenience of operation.

[0081] As an embodiment of the present invention, a folding and adjustment method for the aforementioned foldable remotely adjustable gantry crane with spanning beams is also proposed, comprising the following steps:

[0082] Step 1: Using fastener 8, one set of bases 1 is lifted up and separated from the track;

[0083] Step 2: By controlling the action of the fourth electric telescopic rod 29, the first supplementary block 20 is separated from the first crossbeam 18 and the second crossbeam 19;

[0084] Step 3: The third electric telescopic rod 25 synchronously drives the telescopic arm assembly on one side to move until the first crossbeam 18 and the second crossbeam 19 move away from each other by a predetermined distance.

[0085] Step 4: The fourth electric telescopic rod 29 drives the first supplementary block 20 to move toward the first crossbeam 18 and the second crossbeam 19. At this time, the first supplementary block 20 and the corresponding number of second supplementary blocks 22 are connected to the first crossbeam 18 and the second crossbeam 19.

[0086] Step 5: Control the second electric telescopic rod 17 to activate the folding hinge structure and drive the lifting arm 4 to move relative to the connecting arm 3, thereby adjusting the height of the first crossbeam 18 and the second crossbeam 19.

[0087] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0088] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A foldable, remotely adjustable gantry crane with a span beam, characterized in that, include: The base is provided in two sets, and the base is provided with a fixing component and multiple sets of first rollers; The telescopic boom assembly consists of two sets, each vertically mounted on the base. One set of the telescopic boom assembly is connected to a first crossbeam, and the other set is connected to a second crossbeam. Electric hook assemblies are installed on the first and second crossbeams. A side frame is connected to the first crossbeam and the second crossbeam. The side frame is equipped with a first supplementary block that can be raised and lowered and multiple sets of second supplementary blocks. The first supplementary block is connected to a fourth electric telescopic rod installed on the side frame. When the first crossbeam and the second crossbeam move a predetermined distance relative to each other, the first supplementary block and the corresponding number of second supplementary blocks can connect the first crossbeam and the second crossbeam so that the electric hook assembly can move between the first crossbeam and the second crossbeam. Also includes: A remote control system that communicates with the telescopic boom assembly, the first roller, the electric hook assembly, and the fourth electric telescopic rod. The side frame is fixedly installed on the second crossbeam, and a guide frame is detachably installed at the end of the side frame away from the second crossbeam. Multiple sets of pressure rollers are rotatably installed on the guide frame, and the pressure rollers are adapted to roll with the first crossbeam. One end of the side frame is also fixed with a third electric telescopic rod, and the actuating end of the third electric telescopic rod is fixedly connected to the first crossbeam. The first crossbeam is provided with a first locking block and a first groove, and the second crossbeam is provided with a first locking groove and a first protrusion; The lower ends of the first and second crossbeams on opposite sides are provided with support parts; The structure of the second supplementary block is the same as that of the first supplementary block, and a support portion is provided on the top of the second supplementary block facing the side of the first supplementary block; One end of the first supplementary block is provided with a second locking block and a second groove. The second locking block is adapted to the first locking groove, and the second groove is adapted to the first protrusion. The other end of the first supplementary block is provided with a second locking groove and a second protrusion, which are adapted to the second supplementary block and the first crossbeam. The bottom sides of the first supplementary block and the second supplementary block are provided with abutment portions, which abut and fit with the support portion.

2. The foldable, remotely adjustable gantry crane with spanning beams according to claim 1, characterized in that, The telescopic arm assembly includes a connecting arm fixedly installed perpendicular to the base and a lifting arm slidably connected to the connecting arm. The lifting arm is connected to the first crossbeam or the second crossbeam. The telescopic arm assembly also includes horizontal plates respectively installed on the first crossbeam and the second crossbeam. The two sets of horizontal plates are connected by multiple sets of folding hinge structures, wherein a second electric telescopic rod is provided between the two sets of folding hinge structures.

3. The foldable, remotely adjustable gantry crane with spanning beams according to claim 2, characterized in that, The two adjacent sets of folding hinge structures are connected by two sets of second connecting pins; The folding hinge structure includes a first hinge rod and a second hinge rod that are rotatably connected by a first connecting pin; In the two sets of folding hinge structures located at the ends, one end of the first hinge rod is rotatably mounted with a grooved wheel, which is in rolling connection with a horizontal groove on the horizontal plate, and one end of the second hinge rod is rotatably connected to a connecting shaft on the horizontal plate.

4. The foldable, remotely adjustable gantry crane with spanning beams according to claim 1, characterized in that, Both the first supplementary block and the second supplementary block are provided with sliding connection parts on their sides, and the guide provided on the side of the side frame is slidably connected to the sliding connection parts.

5. The foldable, remotely adjustable gantry crane with spanning beams according to claim 1, characterized in that, One of the bases is also slidably mounted with a bracket, and a second roller is rotatably mounted on the bracket, the axis of rotation of the second roller being perpendicular to the axis of rotation of the first roller; A first electric telescopic rod is fixedly installed on the bracket, and the actuating end of the first electric telescopic rod is fixedly connected to the base.

6. A folding and adjustment method for a foldable, remotely adjustable gantry crane with a span beam as described in any one of claims 1 to 5, characterized in that, Includes the following steps: Step 1: Use fasteners to lift one set of bases until they are separated from the track; Step 2: By controlling the action of the fourth electric telescopic rod, the first supplementary block is separated from the first crossbeam and the second crossbeam; Step 3: The third electric telescopic rod and the external drive structure synchronously drive the telescopic arm assembly on one side to move until the first crossbeam and the second crossbeam move away from each other by a predetermined distance; Step 4: The fourth electric telescopic rod drives the first supplementary block to move toward the first crossbeam and the second crossbeam. At this time, the first supplementary block and the corresponding number of second supplementary blocks are connected to the first crossbeam and the second crossbeam. Step 5: Control the second electric telescopic rod to activate the folding hinge structure and drive the lifting arm to move relative to the connecting arm, adjusting the height of the first and second crossbeams.

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