A tooling, stabilizing system and method for stabilizing a gantry crane's flexible leg hinge point

Abstract

The application relates to a tool, a stabilizing system and a stabilizing method for a gantry crane flexible leg hinge point, and belongs to the technical field of hoisting machinery, which is used for solving the problem that the radial gap of the flexible leg hinge point is exposed during shipment and sea transportation, leading to the shaking of the flexible leg, and the gap elimination and binding fixation cannot be completed by the same tool; the lug plate is provided with a filling hole communicated with the main hole, the filling hole is limited by a wall portion away from the main hole, the tool comprises two filling blocks and a strutting member, the two filling blocks are respectively inserted into the corresponding filling holes from the two lug plates in the axial direction, a first end surface is used for abutting against the wall portion, a second end surface is used for abutting against the shaft, the spacing between the first end surface and the second end surface changes along the insertion direction, the strutting member is arranged between the two filling blocks and forms a transmission connection, the strutting member is operated to drive the two filling blocks to move away from each other in the axial direction, the first end surface is tightly abutted against the wall portion, and the second end surface is tightly pressed against the shaft, so that the filling blocks are clamped in the radial gap, and the tool can be used for eliminating the shaking of the gantry crane flexible leg hinge point and binding fixation.

Description

Technical Field

[0001] This application relates to the field of lifting machinery technology, specifically to a tooling, stabilization system, and stabilization method for the flexible leg hinge point of a gantry crane. Background Technology

[0002] The flexible legs (hereinafter referred to as flexible legs) of the gantry crane are connected to the main beam via hinge points. The hinge point includes a shaft and a lug plate. The lug plate has a main hole through which the shaft passes, and there is a radial clearance between the shaft and the main hole. This radial clearance is provided for maintenance of the flexible leg hinge point. During normal operation of the gantry crane, the hinge point bears the load independently, and this radial clearance does not affect the overall load-bearing capacity. During the loading and sea transport of ultra-large gantry cranes, the stability of the flexible leg hinge points and the reliability of the sea lashing are crucial to ensuring the safety of the entire crane during transport. When loading the entire crane, the flexible legs need to be lifted by a tower. During lifting, the direction of force changes, exposing this radial clearance, causing the flexible legs to sway and shift in posture, affecting lifting accuracy and easily causing hinge point wear and structural damage. During sea transport, to resist the swaying and vibration caused by wind and waves, the flexible legs need to be tied and fixed. The presence of this radial clearance reduces the fixing effect of the lashing, threatening transport safety. Therefore, the industry typically adopts a separate tooling solution. This involves installing a gap-eliminating tooling to eliminate hinge point gaps before loading, removing it after loading, and then reinstalling a lashing tooling for securing the vehicle during sea transport. Existing gap-eliminating tooling is mostly a rigid filling structure, unable to flexibly adjust to the size of the hinge point gap. After filling, the fixation is not secure, making it difficult to maintain a reliable clamping state under long-term vibration and alternating load conditions. It cannot simultaneously meet the stability requirements for gap elimination during loading and the long-term reliability requirements for flexible leg fixation during sea transport. This results in the gap-eliminating tooling and lashing tooling being unable to be integrated, requiring separate installation and removal. This is cumbersome, time-consuming, and labor-intensive, extending the loading and sea transport preparation cycle, increasing operating costs, and repeatedly disassembling and reassembling can easily damage the flexible leg hinge point structure. However, in the process of developing this application, the inventors discovered that the existing technology has at least the following problems: existing tooling cannot reliably maintain a clamping state under long-term vibration and alternating load conditions, making gap elimination and lashing fixation impossible to be completed with the same set of tooling. This is the fundamental reason for the separate tooling solution, cumbersome procedures, and high costs. Summary of the Invention

[0003] The technical problem this application aims to solve is that: due to the radial clearance between the shaft and the main hole of the existing gantry crane flexible leg hinge point, the flexible leg is prone to swaying, posture deviation and reduced binding and fixing effect during the loading, lifting and sea transport process. Moreover, the existing clearance elimination tooling is difficult to reliably maintain the clamping state under long-term vibration and alternating load conditions, which means that clearance elimination and binding and fixing cannot be completed by the same set of tooling, resulting in complicated procedures and high operating costs.

[0004] To address the aforementioned technical problems, in one aspect of this application, a tooling for the flexible leg hinge point of a gantry crane is provided: A fixture for a flexible leg hinge point of a gantry crane, the flexible leg hinge point comprising a shaft and two ear plates arranged opposite each other, each ear plate having a main hole through which the shaft passes, a radial clearance between the shaft and the main hole, and a filling hole on each ear plate communicating with the main hole, the filling hole being limited by a wall portion on its side away from the main hole; the fixture comprising: Two filler blocks are configured to be inserted axially into the filler holes of the corresponding ear plates from the space between the two ear plates, and the filler blocks include at least: The first end face is used to abut against the wall portion; The second end face, opposite to the first end face, is used to abut against the shaft; A support member is provided, which is supported between the two filling blocks and forms an operable transmission connection with the two filling blocks, such that by operating the support member, the two filling blocks can be driven to move away from each other axially. The distance between the first end face and the second end face of the filler block varies along the direction in which it is inserted into the filler hole, such that as the filler block is inserted into the filler hole by operating the spreader, the first end face of the filler block can abut against the wall portion, and the second end face can press against the shaft, thereby securing the filler block in the radial gap.

[0005] Furthermore, the width of the filling hole is equal to the width of the filling block.

[0006] Furthermore, the expanding member includes an adjusting screw with two threaded sections in opposite directions; the two filling blocks each have a first threaded connection and a second threaded connection, the first threaded connection and the second threaded connection being threadedly engaged with the two threaded sections respectively, such that when the adjusting screw is rotated, the two filling blocks move away from each other along the axial direction of the adjusting screw.

[0007] Furthermore, the first threaded connection portion and the second threaded connection portion are threaded holes respectively formed on the filler block.

[0008] Furthermore, the threaded hole is either a through hole that extends laterally through the filler block, or a blind hole that does not extend through.

[0009] Furthermore, the first threaded connection and the second threaded connection are nuts pre-installed on the filler block.

[0010] Furthermore, the adjusting screw has an operating section in the middle, and the operating section has a polygonal cross-section.

[0011] Furthermore, it also includes two locking nuts. The filling block has an outer end face facing outward along the axial direction. The two locking nuts are respectively threaded to both ends of the adjusting screw. When the filling block is locked, the end faces of the two locking nuts abut against the outer end face of the corresponding filling block.

[0012] Furthermore, the filling block and the expanding member are made of high-strength alloy steel.

[0013] Furthermore, the surface of the filler block has a wear-resistant coating.

[0014] In another aspect of this application, a stabilization system for the flexible leg hinge point of a gantry crane is also provided: A stabilization system for the flexible leg hinge point of a gantry crane includes a shaft and two ear plates arranged opposite each other. Each ear plate has a main hole through which the shaft passes, and a radial clearance exists between the shaft and the main hole. The ear plates also have filling holes communicating with the main holes, and the side of the filling hole away from the main hole is defined by a wall portion. The stabilization system further includes a tooling, which comprises: Two filler blocks are configured to be inserted axially into the filler holes of the corresponding ear plates from the space between the two ear plates, and the filler blocks include at least: The first end face is used to abut against the wall portion; The second end face, opposite to the first end face, is used to abut against the shaft; A support member is provided, which is supported between the two filling blocks and forms an operable transmission connection with the two filling blocks, such that by operating the support member, the two filling blocks can be driven to move away from each other axially. The distance between the first end face and the second end face of the filler block varies along the direction in which it is inserted into the filler hole, such that as the filler block is inserted into the filler hole by operating the spreader, the first end face of the filler block can abut against the wall portion, and the second end face can press against the shaft, thereby securing the filler block in the radial gap.

[0015] In another aspect of this application, a method for stabilizing the flexible leg hinge point of a gantry crane as described above is also provided, comprising the following steps: S1) Insert the two filler blocks axially into the filler holes of the corresponding ear plates from the space between the two ear plates; S2) Operate the spreader to drive the two filler blocks away from each other axially, so that the first end face of the filler block can abut against the wall and the second end face can press against the shaft, thereby clamping the filler block in the radial gap.

[0016] Furthermore, prior to step S1), the following steps are also included: S0) Measure the radial clearance between the shaft and the main hole, and determine the size of the filler block based on the measured radial clearance.

[0017] Further, the expanding member includes an adjusting screw, the adjusting screw having two threaded sections with opposite directions of rotation, and the two filling blocks each having a threaded connection portion that threadedly engages with the two threaded sections; wherein, step S2) includes: S21) Rotate the adjusting screw so that the two filling blocks move away from each other along the axial direction of the adjusting screw.

[0018] Furthermore, after step S2), the following steps are also included: S3) Thread two locking nuts to the two ends of the adjusting screw respectively, and make the end faces of the two locking nuts abut against the outer end faces of the corresponding filling blocks facing outward along the axial direction.

[0019] This application has the following beneficial effects: (1) Since the first end face of the filler block is used to abut against the wall and the second end face is used to abut against the shaft, and the distance between the first end face and the second end face changes along the insertion direction, during the process of the operation of the support to drive the two filler blocks away from each other along the axial direction, the filler block gradually wedges into the space between the shaft and the wall, the first end face abuts against the wall and the second end face presses against the shaft, thereby locking the shaft, filler block and filler hole together in the vertical direction, restricting the shaft from moving in the vertical direction, overcoming the problem of the flexible leg swaying and attitude deviation caused by radial clearance during the jacking and sea transport, thus ensuring that the flexible leg is subjected to uniform force and has a stable attitude during the jacking process, and avoiding hinge point wear and structural damage.

[0020] (2) Since the distance between the first end face and the second end face of the filler block changes along the insertion direction, the filler block is locked with the wall and shaft after being wedged in. Under the continuous support of the support member, even if it is subjected to vibration and alternating load for a long time, the filler block will not loosen on its own. This overcomes the problem that the existing gap elimination tooling is difficult to reliably maintain the clamping state under long-term vibration conditions. As a result, the vertical locking function and the marine lashing and fixing function can be continuously undertaken by the same tooling, ensuring the safety of marine transportation.

[0021] (3) Since the same tooling can achieve vertical locking and maintain the clamping for a long time, there is no need to install and remove different toolings separately during the loading and sea transport stages. This overcomes the problems of complicated procedures and high operating costs of the existing separate tooling scheme, thereby simplifying the loading and sea transport preparation process and reducing operating costs. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the installation structure of a flexible leg hinge point tooling according to an embodiment of this application on a gantry crane. The figure shows the assembly relationship between the tooling and the flexible leg hinge point. Figure 2 This is an overall schematic diagram of the filling block and the supporting member according to one embodiment of this application; Figure 3 This is a schematic diagram of a filler block inserted axially into a filler hole according to an embodiment of this application; Figure 4 This is a schematic diagram of a method flow according to an embodiment of this application.

[0023] Figure Labels

[0024] Axis-1; Earplate-2; Main hole-3; Fill hole -4; Fill block -5; First end face -51; Second end face -52; Spreader component -6; Wall section -7. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] Terminology Explanation

[0027] Flexible leg hinge refers to the structure in which the flexible leg of a gantry crane is hinged to the main beam via a pin, including the shaft, lug plate, and holes on the lug plate.

[0028] Ear plates refer to plate-like connecting structures installed on the main beam and flexible legs, with holes in the ear plates for shafts to pass through. It should be noted that the ear plates described in this application refer to ear plates installed on the flexible legs.

[0029] The main hole refers to the hole on the ear plate through which the shaft passes. After the shaft passes through the main hole, a radial clearance is formed between the shaft and the main hole.

[0030] A filling hole is a hole provided on the ear plate that communicates with the main hole. After communicating with the main hole, the filling hole forms a channel for the shaft to pass through. The side of the filling hole away from the main hole is limited by the wall.

[0031] The wall refers to the inner surface of the filling hole away from the main hole, which is used to abut against the first end face of the filling block.

[0032] A filler block is a component used to insert into a filler hole. It is used to lock the shaft, filler block, and filler hole together in the vertical direction, restricting the shaft from moving in the vertical direction.

[0033] The first end face refers to the end face on the filler block that abuts against the wall.

[0034] The second end face refers to the end face on the filler block that is opposite to the first end face and is used to abut the shaft.

[0035] A support component is a part that is placed between two filler blocks and is used to drive the two filler blocks away from each other axially.

[0036] A filler shim is a shim-like component used to fill the gap between the filler block and the inner wall of the filling hole, so that the filler block does not move up and down or rotate within the filling hole.

[0037] Radial clearance refers to the radial gap between the outer circumferential surface of the shaft and the inner wall of the main hole. This gap is set for the maintenance of the flexible leg hinge point. When the gantry crane is working normally, the hinge point bears the load alone, and this radial clearance does not affect the overall force.

[0038] Example 1

[0039] like Figure 1 As shown, Figure 1 This is a schematic diagram of the installation structure of a flexible leg hinge point tooling according to an embodiment of this application on a gantry crane, showing the assembly relationship between the tooling and the flexible leg hinge point. This embodiment provides a tooling for a flexible leg hinge point of a gantry crane. The flexible leg hinge point includes a shaft 1 and two ear plates 2 arranged opposite to each other. Each of the two ear plates 2 has a main hole 3 through which the shaft 1 passes. After the shaft 1 passes through the main hole 3, there is a radial clearance between the outer peripheral surface of the shaft 1 and the inner wall of the main hole 3. A filling hole 4 is also provided on the ear plate 2. The filling hole 4 communicates with the main hole 3. The side of the filling hole 4 away from the main hole 3 is limited by a wall portion 7.

[0040] In this embodiment, the ear plate 2 is a rectangular plate structure. The main hole 3 is a circular hole, and the filling hole 4 is a rectangular hole. The filling hole 4 extends axially, and its width is constant along its height. The filling hole 4 is located above the main hole 3 and communicates with it. The side of the filling hole 4 away from the main hole 3 is a wall portion 7, which is the top wall of the filling hole 4. The wall portion 7 extends horizontally, and the shaft 1 is located inside the main hole 3, with a radial gap between the shaft 1 and the main hole 3.

[0041] It should be noted that the flexible leg hinge also includes a main beam lug plate disposed on the main beam. The main beam lug plate has a hole for the shaft 1 to pass through. After the shaft 1 passes through the hole in the main beam lug plate, the shaft 1 and the hole in the main beam lug plate are tightly fitted. The hole in the main beam lug plate positions the shaft 1. The swaying of the flexible leg mainly originates from the radial clearance between the shaft 1 and the main hole 3 of the lug plate 2. The tooling in this embodiment is used to limit the vertical movement of the shaft 1.

[0042] The tooling includes two filler blocks 5 and a support piece 6.

[0043] Two filler blocks 5 are arranged opposite each other along the thickness direction of the ear plate 2. The two filler blocks 5 are configured to be inserted axially into the filling holes 4 of the corresponding ear plate 2 from the space between the two ear plates 2. The insertion direction of the filler blocks 5 is axial, i.e., the thickness direction of the ear plate 2. Each filler block 5 includes a first end face 51 and a second end face 52. The first end face 51 abuts against the wall portion 7. The second end face 52 is opposite to the first end face 51 and abuts against the shaft 1. The distance between the first end face 51 and the second end face 52 varies along the insertion direction. At the beginning of the insertion direction, the distance between the first end face 51 and the second end face 52 is smaller. At the end of the insertion direction, the distance between the first end face 51 and the second end face 52 is larger. After the filler blocks 5 are inserted into the filling holes 4, the first end face 51 faces the wall portion 7, and the second end face 52 faces the shaft 1.

[0044] A support member 6 is positioned between two filler blocks 5. The support member 6 and the two filler blocks 5 form an operable transmission connection. When the support member 6 is operated, it drives the two filler blocks 5 to move away from each other axially. As the two filler blocks 5 move away from each other axially, they each further enter the corresponding filling hole 4 in the insertion direction. As the filler block 5 further enters the filling hole 4, the distance between the first end face 51 and the second end face 52 of the filler block 5 gradually increases. The filler block 5 gradually wedges into the wall portion 7 and the shaft 1. The first end face 51 of the filler block 5 abuts against the wall portion 7. The second end face 52 of the filler block 5 presses against the shaft 1. Thus, the two filler blocks 5 are locked in the radial gap, vertically locking the shaft 1, the filler blocks 5, and the filling hole 4 together, restricting the shaft 1 from moving vertically.

[0045] In some embodiments, the tooling further includes a filling shim. The filling shim is disposed between the filling block 5 and the inner wall of the filling hole 4. The filling shim is used to fill the gap between the filling block 5 and the inner wall of the filling hole 4. The filling shim prevents the filling block 5 from moving up and down or rotating within the filling hole 4. The filling shim may be made of a thin metal sheet. The thickness of the filling shim is determined based on the measured gap. The filling shim can be inserted between the filling block 5 and the inner wall of the filling hole 4 from the space between the two ear plates 2 after the filling block 5 is inserted into the filling hole 4 and before the spreader 6 tightens.

[0046] In some embodiments, the spreading member 6 includes an adjusting screw. The adjusting screw is divided into three sections along the axial direction. The middle section is the operating section. The two end sections are respectively machined with threaded sections in opposite directions. The three sections are connected as a single unit. The two filler blocks 5 each have a first threaded connection portion and a second threaded connection portion. The first threaded connection portion and the second threaded connection portion are respectively threadedly engaged with the threaded sections of the two end sections. When the adjusting screw is rotated, the two filler blocks 5 move away from each other along the axial direction of the adjusting screw. The axial direction of the adjusting screw is consistent with the insertion direction of the filler blocks 5. This adjusting screw is an optional configuration used to drive the two filler blocks 5 away from each other along the axial direction by operating the spreading member 6.

[0047] In one implementation, the first threaded connection and the second threaded connection are threaded holes respectively formed on the filler block 5. The threaded holes either penetrate laterally through the filler block 5 to form through holes, or they do not penetrate the filler block 5 to form blind holes. The threaded hole of the first threaded connection engages with a threaded section of the adjusting screw. The threaded hole of the second threaded connection engages with another threaded section of the adjusting screw. When the adjusting screw is rotated, the two filler blocks 5 move in opposite directions along the axial direction of the adjusting screw.

[0048] In another implementation, the first threaded connection and the second threaded connection are nuts pre-installed on the filler block 5. The nuts are fixedly installed in a predetermined position on the filler block 5. The nuts are threadedly engaged with the threaded section of the adjusting screw in the corresponding direction of rotation. When the adjusting screw is rotated, the two filler blocks 5 move in opposite directions along the axial direction of the adjusting screw.

[0049] The adjusting screw has an operating section in the middle. The operating section has a polygonal cross-section. The operator uses a tool in conjunction with the operating section to rotate the adjusting screw. The operating section is located in the space between the two filler blocks 5, facilitating operation from the space between the two ear plates 2.

[0050] In some embodiments employing an adjusting screw, the filler block 5 has an outer end face facing outward along the axial direction. The outer end face is the end face of filler block 5 facing away from the other filler block 5. The fixture also includes two locking nuts. The two locking nuts are threaded to both ends of the adjusting screw. When the filler block 5 is locked, the end faces of the two locking nuts abut against the outer end faces of the corresponding filler block 5. The locking nuts prevent the adjusting screw from rotating relative to the filler block 5 under vibration and alternating loads, thereby maintaining the wedged state of the filler block 5.

[0051] In this embodiment, the filler block 5 and the support member 6 are made of high-strength alloy steel. High-strength alloy steel has high yield strength and fatigue resistance. The surface of the filler block 5 has a wear-resistant coating. The wear-resistant coating is used to improve the wear resistance of the surface of the filler block 5, reduce surface wear between the filler block 5 and the wall 7 and shaft 1, and extend the service life of the tooling.

[0052] It should be noted that, Figure 2 The expansion member 6, connecting block, and bolts are shown. Figure 2 The supporting member 6 shown is a rigid rod. Both ends of the rigid rod are connected to the two filling blocks 5 via connecting blocks and bolts, respectively. The rigid rod does not directly drive the two filling blocks 5 to separate. A detailed description of the rigid rod can be found in Embodiment 3.

[0053] In this embodiment, the tooling is first inserted axially into the filling holes 4 of the corresponding ear plates 2 through the space between the two ear plates 2. Then, the spreading member 6 is operated to move the two filling blocks 5 away from each other axially. The two filling blocks 5 are gradually wedged into the filling holes 4 until the first end face 51 abuts against the wall 7 and the second end face 52 presses against the shaft 1. In the embodiment using an adjusting screw, the two locking nuts are then tightened to the outer end faces of the corresponding filling blocks 5. After the tooling is installed, the shaft 1, filling blocks 5, and filling holes 4 are locked together vertically, eliminating leg wobble. The technical effect of this embodiment is as follows: The distance between the first end face 51 and the second end face 52 of the filling block 5 varies along the insertion direction. When the operating support 6 is activated, the two filler blocks 5 move away from each other axially, gradually wedging themselves between the wall 7 and the shaft 1. The first end face 51 abuts against the wall 7, and the second end face 52 presses against the shaft 1, thereby locking the shaft 1, filler blocks 5, and filler hole 4 together in the vertical direction, restricting the shaft 1 from moving vertically. Due to the wedge-shaped self-locking effect of the filler blocks 5, they are locked in the radial gap, and even under long-term vibration and alternating loads, the filler blocks 5 will not loosen on their own. Thus, the tooling in this embodiment can achieve vertical locking of the hinge point during the loading stage and can also serve as a binding and fixing tooling during the sea transport stage to reliably maintain a locked state for a long time, achieving the integration of sway elimination and binding and fixing. Since the same tooling can complete both vertical locking and binding and fixing, there is no need to install and remove different tooling separately during the loading and sea transport stages, simplifying the loading and sea transport preparation process and reducing operating costs.

[0054] The additional effects of the subordinate features are as follows: The width of the filling hole 4 is equal to the width of the filling block 5. The filling block 5 slides against the two side walls of the filling hole 4 in the width direction, preventing the filling block 5 from deflecting or shifting during wedging, ensuring the stability and reliability of the wedging direction. The adjusting screw has two threaded sections with opposite directions of rotation. Rotating the adjusting screw allows the two filling blocks 5 to move away from each other synchronously and symmetrically along the axial direction, making operation simple and the adjustment precise and controllable. When the first and second threaded connection parts are threaded holes opened on the filling block 5, the threaded holes are machined integrally with the filling block 5, resulting in a compact structure and high strength. When the threaded holes are through holes or blind holes, they can be flexibly selected according to the thickness of the filling block 5 and the processing conditions, improving process adaptability. When the first and second threaded connection parts are nuts pre-installed on the filling block 5, the filling block 5 body does not need to be threaded, and standard nuts can be used, resulting in low manufacturing costs and easy replacement and maintenance. The middle part of the adjusting screw has an operating section with a polygonal cross-section, which facilitates tool application and convenient operation. The end face of the locking nut abuts against the outer end face of the filler block 5, preventing the adjusting screw from rotating under vibration conditions and ensuring that the filler block 5 remains in a wedge-tight state for a long time. The filler block 5 and the support member 6 are made of high-strength alloy steel, which can withstand large contact stress and alternating loads, ensuring the structural strength of the tooling. The surface of the filler block 5 has a wear-resistant coating, which can reduce wear between the filler block 5 and the wall 7 and the shaft 1, and improve the reusability of the tooling.

[0055] Example 2

[0056] Based on Embodiment 1, this embodiment replaces the shape of the filling hole 4. For example... Figure 3 As shown, Figure 3 This is a schematic diagram illustrating the axial insertion of a filler block 5 into a filler hole 4 according to an embodiment of this application. In this embodiment, the hole on the ear plate 2 is an irregularly shaped hole. The irregularly shaped hole is egg-shaped, narrow at the top and wide at the bottom. The lower part of the irregularly shaped hole is the portion through which the shaft 1 passes, forming the main hole 3. The upper part of the irregularly shaped hole is the filler hole 4. The filler hole 4 is integrally connected with the main hole 3. The side of the filler hole 4 away from the main hole 3 is limited by a wall portion 7. The wall portion 7 is the inner wall of the top of the irregularly shaped hole.

[0057] After shaft 1 passes through main hole 3, there is a radial gap between the outer circumferential surface of shaft 1 and the inner wall of main hole 3. Two filler blocks 5 are configured to be inserted axially into the filler holes 4 of corresponding ear plates 2 from the space between the two ear plates 2. After the filler blocks 5 are inserted into the filler holes 4, the first end face 51 abuts against the wall portion 7, and the second end face 52 abuts against shaft 1. The distance between the first end face 51 and the second end face 52 varies along the insertion direction. When the spreader 6 is operated, the two filler blocks 5 move away from each other axially. The filler blocks 5 gradually wedge into the narrow part of the irregular hole and between shaft 1. The first end face 51 of the filler block 5 abuts against the wall portion 7, and the second end face 52 presses against shaft 1. Thus, the filler blocks 5 are locked in the radial gap.

[0058] In this embodiment, since the filling hole 4 is an irregularly shaped hole, after the filling block 5 is inserted into the filling hole 4, there may be a local gap between the filling block 5 and the inner wall of the filling hole 4. A filling gasket can be placed in the gap between the filling block 5 and the inner wall of the filling hole 4. The filling gasket is used to fill the local gap, so that the filling block 5 does not move up and down or rotate within the filling hole 4. The thickness of the filling gasket is determined based on the measured local gap.

[0059] In this embodiment, the width of the filling hole 4 gradually changes along its height. The width of the filling block 5 is adapted to the width of the corresponding insertion position of the filling block 5 in the filling hole 4. The difference between this embodiment and Embodiment 1 is that the filling hole 4 is an irregularly shaped hole, rather than a rectangular hole with a constant width. This embodiment is suitable for situations where the main hole 3 and the filling hole 4 are integrally formed, the processing technology of the ear plate 2 is simpler, and the overall structural strength of the hole is higher.

[0060] The technical effects of this embodiment are as follows. Based on Embodiment 1, since the hole on the ear plate 2 is an integrally formed irregular hole, no additional connecting structure is needed between the main hole 3 and the filling hole 4, simplifying the processing technology of the ear plate 2 and increasing the overall structural strength of the hole. The width of the filling hole 4 gradually changes along the height direction. When the filling block 5 is inserted into the narrow part of the irregular hole, the gap between the filling block 5 and the inner wall of the irregular hole gradually narrows. The filling block 5 is clamped by the wall 7 and the shaft 1 in the narrow part, which helps to enhance the stability after wedging. By filling the local gap with a filling shim, the up-and-down movement and rotation of the filling block 5 in the filling hole 4 can be further suppressed, improving the adaptability of the tooling under different hole shapes.

[0061] Example 3

[0062] Based on Embodiment 1, this embodiment replaces the specific structure of the support member 6. For example... Figure 2As shown, in this embodiment, the supporting member 6 is a rigid rod. The rigid rod is a rod-shaped structure extending axially. Connecting blocks are connected to both ends of the rigid rod. The middle part of the connecting block is rectangular. Two semicircles are formed on both sides of the connecting block. Through holes are provided at the two semicircles of the connecting block. Two bolts pass through the through holes at the two semicircles of the connecting block. Threaded holes are provided on the filling block 5. After the bolt passes through the through hole of the connecting block, it is threaded into the threaded hole of the filling block 5. The head of the bolt abuts against the side of the connecting block facing away from the filling block 5. Thus, the rigid rod is connected to the two filling blocks 5 as a whole through the connecting blocks and bolts, preventing the filling blocks 5 from moving out axially. It should be noted that in this embodiment, the rigid rod and bolts do not directly drive the two filling blocks 5 to separate. The two filling blocks 5 are wedged in by external force pushing them axially into the corresponding filling holes 4. The rigid rod and bolts are used to maintain the relative position between the two filling blocks 5. In this embodiment, the two filling blocks 5 are wedged in by external force pushing them axially into the corresponding filling holes 4. Then, the two ends of the rigid rod are connected to the two filler blocks 5 respectively by connecting blocks and bolts. The connecting blocks and bolts form an axial constraint on the two filler blocks 5, preventing them from moving closer to each other under long-term stress. The rigid rod structure of this embodiment is simple and has low manufacturing cost, making it suitable for applications where the filler volume does not need to be adjusted after locking. The technical effects of this embodiment are as follows: The two ends of the rigid rod are threadedly connected to the two filler blocks 5 respectively by connecting blocks and bolts, forming an axial constraint on the two filler blocks 5. This prevents the filler blocks 5 from moving closer together axially and loosening under long-term vibration and alternating loads, thus maintaining the wedged state of the filler blocks 5. It is suitable for applications where the filler volume does not need to be adjusted after locking.

[0063] Example 4

[0064] This embodiment provides a stabilization system for the flexible leg hinge point of a gantry crane. The stabilization system includes a shaft 1, two lug plates 2, and a fixture. The two lug plates 2 are arranged opposite to each other. Each lug plate 2 has a main hole 3 through which the shaft 1 passes. The shaft 1 passes through the main hole 3. There is a radial clearance between the shaft 1 and the main hole 3. A filling hole 4 is also provided on the lug plate 2. The filling hole 4 communicates with the main hole 3. The side of the filling hole 4 away from the main hole 3 is limited by a wall portion 7. The fixture includes two filling blocks 5 and a support member 6.

[0065] Two filler blocks 5 are configured to be inserted axially into the filler holes 4 of the corresponding ear plates 2 from the space between the two ear plates 2. The first end face 51 of the filler block 5 abuts against the wall portion 7. The second end face 52 of the filler block 5 is opposite to the first end face 51 and abuts against the shaft 1. The distance between the first end face 51 and the second end face 52 varies along the insertion direction. A support member 6 is supported between the two filler blocks 5. The support member 6 forms an operable transmission connection with the two filler blocks 5. When the support member 6 is operated, it can drive the two filler blocks 5 to move away from each other axially. As the two filler blocks 5 move away from each other axially, the filler blocks 5 gradually wedge into the space between the wall portion 7 and the shaft 1, with the first end face 51 pressing against the wall portion 7 and the second end face 52 pressing against the shaft 1, thereby securing the filler blocks 5 in the radial gap.

[0066] The stabilization system also includes main beam lugs mounted on the main beam. Each main beam lug has a through hole for shaft 1 to pass through. After shaft 1 passes through the through hole in the main beam lug, it fits tightly with the through hole. The through hole in the main beam lug provides positioning for shaft 1. When the tooling locks shaft 1, filler block 5, and filler hole 4 together vertically, a stable connection is formed between shaft 1, lug 2, and the main beam lug. The flexible leg hinge point no longer sways during loading, lifting, and sea transport.

[0067] The stabilization system in this embodiment uses the tooling and ear plate 2 to lock the shaft 1, filler block 5, and filler hole 4 on both sides of the flexible leg in the vertical direction, thereby stabilizing the entire flexible leg hinge point. The positioning function of the through hole on the main beam ear plate for the shaft 1 is the technical premise of this embodiment. This embodiment protects the tooling and ear plate 2 as a whole system, covering both the manufacturing and sales of the tooling itself, as well as the combined use scenarios of the tooling, ear plate 2, and shaft 1.

[0068] The technical effects of this embodiment are as follows. Since the stabilization system includes the ear plate 2 and the tooling, the filling block 5 of the tooling, under the action of the spreading member 6, wedges into the wall 7 and the shaft 1, locking the shaft 1, filling block 5, and filling hole 4 together in the vertical direction, restricting the shaft 1 from moving vertically, thus ensuring the stability of the flexible leg hinge point during ship loading and sea transport. The through hole on the main beam ear plate fits tightly with the shaft 1, positioning the shaft 1 and providing a reliable basis for the tooling to lock the flexible leg side hinge point. Combining the tooling with the ear plate 2 and shaft 1 into a unified stabilization system provides comprehensive protection, covering scenarios where the tooling is manufactured and sold separately, the ear plate with a perforated structure is manufactured and sold, and the combined use of both. This avoids competitors circumventing infringement by separately manufacturing and selling the ear plate and tooling when only the tooling is protected.

[0069] Example 5

[0070] This embodiment provides a method for stabilizing the flexible leg hinge point of a gantry crane using a fixture. The flexible leg hinge point includes a shaft 1 and two ear plates 2 arranged opposite to each other. Each ear plate 2 has a main hole 3 through which the shaft 1 passes. There is a radial clearance between the shaft 1 and the main hole 3. A filling hole 4 is also provided on the ear plate 2. The filling hole 4 communicates with the main hole 3. The side of the filling hole 4 away from the main hole 3 is limited by a wall portion 7. The fixture includes two filling blocks 5 and a support member 6. The filling block 5 includes a first end face 51 and a second end face 52 opposite to each other. The first end face 51 abuts against the wall portion 7. The second end face 52 abuts against the shaft 1. The distance between the first end face 51 and the second end face 52 varies along the insertion direction of the filling block 5. The support member 6 is supported between the two filling blocks 5. The support member 6 and the two filling blocks 5 form an operable transmission connection.

[0071] like Figure 4 As shown, Figure 4 This is a schematic diagram of a method flow according to an embodiment of the present application, showing steps S1) and S2). The method includes the following steps.

[0072] S1) Insert two filler blocks 5 axially into the corresponding filler holes 4 of the ear plates 2 from the space between the two ear plates 2. Specifically, align the two filler blocks 5 with the filler holes 4 of the two ear plates 2. Push the filler blocks 5 axially. After the filler blocks 5 enter the filler holes 4, the first end face 51 faces the wall 7 and the second end face 52 faces the shaft 1.

[0073] S2) Operate the spreader 6 to drive the two filler blocks 5 away from each other axially. As the two filler blocks 5 move away from each other axially, they each further enter their corresponding filler holes 4. The filler blocks 5 gradually wedge into the space between the wall 7 and the shaft 1. The first end face 51 of the filler block 5 abuts against the wall 7. The second end face 52 of the filler block 5 presses against the shaft 1. The filler blocks 5 are then secured in the radial clearance.

[0074] Before step S1), the method further includes step S0). S0) Measure the radial clearance between shaft 1 and main hole 3. Determine the size of filler block 5 based on the measured radial clearance. Specifically, measure the clearance value between shaft 1 and main hole 3. Determine the distance and its variation range between the first end face 51 and the second end face 52 of filler block 5 based on the clearance value. Manufacture or select filler block 5 according to the determined dimensions. This ensures that filler block 5 can adapt to the radial clearance of different hinge points, meeting the usage requirements of gantry cranes of different specifications.

[0075] In some embodiments, the spreading member 6 includes an adjusting screw. The adjusting screw has two threaded sections with opposite directions of rotation. Two filler blocks 5 each have a threaded connection portion that threadedly engages with the two threaded sections. Step S2) includes step S21). S21) Rotate the adjusting screw so that the two filler blocks 5 move away from each other along the axial direction of the adjusting screw. Specifically, engage the tool with the operating section in the middle of the adjusting screw. Rotate the adjusting screw. As the adjusting screw rotates, due to the opposite directions of rotation of the two threaded sections, the two filler blocks 5 move in opposite directions along the axial direction of the adjusting screw. The two filler blocks 5 gradually wedge into the filling hole 4.

[0076] Following step S2), the method further includes step S3). In step S3), the filler block 5 has an outer end face facing outward along the axial direction. The outer end face is the end face of the filler block 5 facing away from the other filler block 5. In S3), two locking nuts are threaded onto both ends of the adjusting screw. The end faces of the two locking nuts abut against the outer end faces of the corresponding filler blocks 5. Specifically, the two locking nuts are screwed onto both ends of the adjusting screw. The locking nuts are continued to be tightened until the end faces of the locking nuts abut against the outer end faces of the corresponding filler blocks 5. The locking nuts are used to prevent the adjusting screw from rotating under vibration and alternating loads, maintaining the wedged state of the filler blocks 5.

[0077] The method of this embodiment is implemented before loading, by locking the flexible leg hinge point in the vertical direction. After loading is completed, the tooling remains in its installed state and continues to be used as a marine lashing and fixing structure. After marine transport is completed, the adjusting screw is rotated to bring the two filler blocks 5 closer to each other axially, the locking nut is removed in the reverse direction, and the filler blocks 5 are taken out from the filler hole 4. The tooling can be reused.

[0078] The technical effects of this embodiment are as follows. In S1), two filler blocks 5 are inserted axially into the corresponding ear plate 2's filling holes 4, and in S2), the spreading member 6 drives the two filler blocks 5 to move away from each other axially. The filler blocks 5 gradually wedge into the wall 7 and shaft 1, with the first end face 51 abutting against the wall 7 and the second end face 52 pressing against the shaft 1. This vertically locks the shaft 1, filler blocks 5, and filling holes 4 together, restricting the shaft 1 from moving vertically. Due to the wedge-shaped self-locking effect of the filler blocks 5, they remain locked in the radial clearance and will not loosen even under long-term vibration and alternating loads. Therefore, the vertical locking during loading and the binding during sea transport are completed by the same tooling, simplifying the workflow and reducing operating costs. In S0), the size of the filler blocks 5 is determined after measuring the radial clearance, allowing the tooling to adapt to the hinge point clearances of different gantry crane specifications, improving versatility. In S21), rotating the adjusting screw causes the two filler blocks 5 to move away axially synchronously and symmetrically, making the adjustment process simple and precise. S3) The locking nut is pressed against the outer end face of the filling block 5 to prevent the adjusting screw from rotating under vibration conditions, and to further ensure the long-term reliable wedging state of the filling block 5.

[0079] The embodiments described above are merely further illustrations of this application and are not intended to limit this application in any other way. This application may have many other embodiments. Without departing from the spirit and essence of this application, those skilled in the art can make various corresponding modifications and changes based on this application, but these corresponding modifications and changes should all fall within the protection scope of this application.

Claims

1. A fixture for a flexible leg hinge point of a gantry crane, the flexible leg hinge point comprising a shaft and two ear plates arranged opposite to each other, each ear plate having a main hole through which the shaft passes, and a radial clearance between the shaft and the main hole, characterized in that, The ear plate is also provided with a filling hole, which communicates with the main hole, and the side of the filling hole away from the main hole is limited by a wall portion. The tooling includes: Two filler blocks are configured to be inserted axially into the filler holes of the corresponding ear plates from the space between the two ear plates, and the filler blocks include at least: The first end face is used to abut against the wall portion; The second end face, opposite to the first end face, is used to abut against the shaft; A support member is provided, which is supported between the two filling blocks and forms an operable transmission connection with the two filling blocks, such that by operating the support member, the two filling blocks can be driven to move away from each other axially. The distance between the first end face and the second end face of the filler block varies along the direction in which it is inserted into the filler hole, such that as the filler block is inserted into the filler hole by operating the spreader, the first end face of the filler block can abut against the wall portion, and the second end face can press against the shaft, thereby securing the filler block in the radial gap.

2. The tooling for the flexible leg hinge point of a gantry crane according to claim 1, characterized in that, The width of the filling hole is equal to the width of the filling block.

3. The tooling for the flexible leg hinge point of a gantry crane according to claim 1, characterized in that, The expanding member includes an adjusting screw with two threaded sections in opposite directions; the two filling blocks each have a first threaded connection and a second threaded connection, which are threadedly engaged with the two threaded sections, such that when the adjusting screw is rotated, the two filling blocks move away from each other along the axial direction of the adjusting screw.

4. The tooling for the flexible leg hinge point of a gantry crane according to claim 3, characterized in that, The first threaded connection and the second threaded connection are threaded holes formed on the filler block.

5. The tooling for the flexible leg hinge point of a gantry crane according to claim 4, characterized in that, The threaded hole is either a through hole that extends laterally through the filler block, or a blind hole that does not extend through it.

6. The tooling for the flexible leg hinge point of a gantry crane according to claim 3, characterized in that, The first threaded connection and the second threaded connection are nuts pre-installed on the filler block.

7. The tooling for the flexible leg hinge point of a gantry crane according to claim 3, characterized in that, The adjusting screw has an operating section in the middle, and the operating section has a polygonal cross-section.

8. The tooling for the flexible leg hinge point of a gantry crane according to claim 3, characterized in that, It also includes two locking nuts. The filling block has an outer end face facing outward along the axial direction. The two locking nuts are respectively threaded to both ends of the adjusting screw. When the filling block is locked, the end faces of the two locking nuts abut against the outer end face of the corresponding filling block.

9. The tooling for the flexible leg hinge point of a gantry crane according to claim 1, characterized in that, The filler block and the expander are made of high-strength alloy steel.

10. The tooling for the flexible leg hinge point of a gantry crane according to claim 1, characterized in that, The surface of the filler block has a wear-resistant coating.

11. A stabilization system for the flexible leg hinge point of a gantry crane, comprising a shaft and two ear plates arranged opposite to each other, each ear plate having a main hole through which the shaft passes, and a radial clearance between the shaft and the main hole, characterized in that, The ear plate is also provided with a filling hole, which communicates with the main hole, and the side of the filling hole away from the main hole is limited by a wall portion. The stabilization system also includes a tooling, which includes: Two filler blocks are configured to be inserted axially into the filler holes of the corresponding ear plates from the space between the two ear plates, and the filler blocks include at least: The first end face is used to abut against the wall portion; The second end face, opposite to the first end face, is used to abut against the shaft; A support member is provided, which is supported between the two filling blocks and forms an operable transmission connection with the two filling blocks, such that by operating the support member, the two filling blocks can be driven to move away from each other axially. The distance between the first end face and the second end face of the filler block varies along the direction in which it is inserted into the filler hole, such that as the filler block is inserted into the filler hole by operating the spreader, the first end face of the filler block can abut against the wall portion, and the second end face can press against the shaft, thereby securing the filler block in the radial gap.

12. A method for stabilizing a flexible leg hinge point of a gantry crane using tooling, the flexible leg hinge point comprising a shaft and two ear plates arranged opposite to each other, each ear plate having a main hole through which the shaft passes, and a radial clearance between the shaft and the main hole, characterized in that... The ear plate is also provided with a filling hole, which communicates with the main hole, and its side away from the main hole is defined by a wall portion. The tooling includes: two filling blocks, each including a first end face and a second end face opposite to each other, the first end face being used to abut against the wall portion, and the second end face being used to abut against the shaft, wherein the distance between the first end face and the second end face of the filling block varies along the direction in which they are inserted into the filling hole; a support member, which is supported between the two filling blocks and forms an operable transmission connection with the two filling blocks; the method includes: S1) Insert the two filler blocks axially into the filler holes of the corresponding ear plates from the space between the two ear plates; S2) Operate the spreader to drive the two filler blocks away from each other axially, so that the first end face of the filler block can abut against the wall and the second end face can press against the shaft, thereby clamping the filler block in the radial gap.

13. The method according to claim 12, characterized in that, Before step S1), it also includes: S0) Measure the radial clearance between the shaft and the main hole, and determine the size of the filler block based on the measured radial clearance.

14. The method according to claim 12, characterized in that, The expanding member includes an adjusting screw, which has two threaded sections with opposite directions of rotation, and the two filling blocks each have a threaded connection portion that threadedly engages with the two threaded sections; wherein, step S2) includes: S21) Rotate the adjusting screw so that the two filling blocks move away from each other along the axial direction of the adjusting screw.

15. The method according to claim 14, characterized in that, Following step S2), the following is also included: S3) Thread two locking nuts to the two ends of the adjusting screw respectively, and make the end faces of the two locking nuts abut against the outer end faces of the corresponding filling blocks facing outward along the axial direction.

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