Transfer lifting appliance system for heavy gantry crane

Abstract

The utility model relates to a transfer sling system for a heavy gantry crane, comprising: a hanger box girder, the hanger box girder comprising a plurality of cross beams and a plurality of longitudinal beams welded to each other, the plurality of cross beams and the plurality of longitudinal beams being connected to each other to form a rectangular hanger box girder; the upper hanging bracket comprises at least two groups of parallel upper linear modules which are fixed at the bottom of the hanging bracket box girder along the first direction and are arranged at intervals; the lower hanging bracket comprises lower linear modules which are connected to the upper linear modules in a sliding mode, are parallel to each other in the second direction and are arranged at intervals; the number of the lifting appliance lifting points is multiple, and the multiple lifting appliance lifting points are connected to the lower linear modules respectively and move in the length direction of the lower linear modules. The upper linear module and the lower linear module are matched with each other, so that the lifting points of the lifting appliance can move in the first direction and the second direction in the horizontal plane, the relative positions of the lifting points of the lifting appliance are adjusted, and the gravity center of a lifted object on the lifting appliance is adjusted.

Description

Technical Field

[0001] The present application relates to the technical field of slings, and in particular to a transfer sling system for heavy-duty gantry cranes. Background Art

[0002] Currently, during the daily operation of gantry cranes, it is common for the sling to not match the lifting point of the load, or for the load's center of gravity to be significantly offset from the sling's center. When this happens, the sling must be replaced. This inevitably requires rewinding the winch wire rope, which is time-consuming and labor-intensive.

[0003] When the center of gravity of the load deviates significantly from the center of the spreader, the spreader will tilt. This can lead to instability and the load can easily slip or fall off the hook, causing casualties or property damage. Uneven force on one side of the spreader can cause excessive local stress, damaging the spreader and even the trolley, thus affecting the service life and safety of the crane. Summary of the Invention

[0004] An embodiment of the present application provides a transfer sling system for a heavy-duty gantry crane to solve the problem in the related art that the sling is difficult to match the lifting point of the suspended object or the center of gravity of the suspended object is seriously deviated from the center of the sling.

[0005] The embodiment of the present application provides a transfer sling system for a heavy-duty gantry crane, comprising:

[0006] A hanger box girder, the hanger box girder comprising a plurality of cross beams and a plurality of longitudinal beams welded to each other, wherein the plurality of cross beams and the plurality of longitudinal beams are connected to each other to form a hanger box girder of a rectangular structure;

[0007] An upper hanger, the upper hanger comprising at least two sets of upper linear modules fixed to the bottom of the hanger box beam along a first direction and arranged parallel to each other and spaced apart;

[0008] A lower hanger, the lower hanger comprising lower linear modules slidably connected to each of the upper linear modules and arranged parallel to and spaced apart from each other along the second direction;

[0009] There are multiple sling points, each of which is connected to the lower linear module and moves along the length direction of the lower linear module.

[0010] In some embodiments: the upper linear module includes two first guide rails fixed to the bottom of the hanger box beam and arranged parallel to each other and spaced apart;

[0011] Two sets of lower linear modules that are parallel to each other and spaced apart are slidably connected between the two first guide rails;

[0012] and a first driving mechanism for respectively driving the two groups of the lower linear modules to move along the length direction of the first guide rail.

[0013] In some embodiments: a guide groove is formed on the first guide rail, a first slider is slidably connected in the guide groove, and the first slider is a "T"-shaped mechanism;

[0014] The first sliding block is partially located in the guide groove of the first guide rail and is slidably connected to the first guide rail;

[0015] The lower linear module is fixedly connected to the first slider and is slidably connected to the first guide rail through the first slider.

[0016] In some embodiments: the first driving mechanism includes a first motor, the output shaft of the first motor is connected to a first screw pair extending along the length direction of the first guide rail;

[0017] The first screw pair is connected to the lower linear module and converts the rotational motion of the first motor into linear motion to drive the lower linear module on the first guide rail.

[0018] In some embodiments: the lower linear module includes a second guide rail and a second slider adapted to and slidably connected to the second guide rail, and the lifting point of the sling is fixed on the second slider;

[0019] A second driving mechanism is provided on the second guide rail for driving the second slider to move back and forth on the second guide rail.

[0020] In some embodiments: the second driving mechanism includes a second motor, and the output shaft of the second motor is connected to a second screw pair extending along the length direction of the second guide rail;

[0021] The second screw pair is connected to the second slider and converts the rotational motion of the second motor into linear motion to drive the second slider on the second guide rail.

[0022] In some embodiments: the lifting point of the sling includes a box-type ear plate seat with an opening facing downward, and a pin hole is provided on the box-type ear plate seat. A plug-in pin shaft that passes through the box-type ear plate seat is plugged and connected in the pin hole.

[0023] In some embodiments: a shaft sleeve is connected to the box-type ear plate seat, the plug-in pin shaft slides in the shaft sleeve, and an end of the shaft sleeve away from the box-type ear plate seat is provided with a cylinder that drives the plug-in pin shaft to slide in the shaft sleeve.

[0024] In some embodiments: the upper linear module is arranged along the length direction of the hanger box beam, and the lower linear module is arranged along the width direction of the hanger box beam;

[0025] The length of the lower linear module slidably connected to one group of the upper linear modules is smaller than the length of the lower linear module slidably connected to the other group of the upper linear modules.

[0026] In some embodiments, the multiple transverse beams and the multiple longitudinal beams of the hanger box beam are all box beam structures welded from steel plates.

[0027] The beneficial effects of the technical solution provided by this application include:

[0028] An embodiment of the present application provides a transfer sling system for a heavy-duty gantry crane. Since the transfer sling system for a heavy-duty gantry crane of the present application is provided with a hanger box beam, the hanger box beam includes multiple cross beams and multiple longitudinal beams welded to each other, and the multiple cross beams and multiple longitudinal beams are connected to each other to form a hanger box beam with a rectangular structure; an upper hanger includes at least two groups of upper linear modules fixed to the bottom of the hanger box beam along a first direction and parallel to each other and spaced apart; a lower hanger includes lower linear modules slidably connected to each upper linear module and parallel to each other and spaced apart along a second direction; a sling hanging point, the sling hanging point is provided with multiple, and the multiple sling hanging points are respectively connected to each lower linear module and move along the length direction of the lower linear module.

[0029] Therefore, the transfer sling system for heavy-duty gantry cranes of the present application is provided with an upper hanger and a lower hanger on the hanger box beam, and a plurality of sling points are provided on the lower hanger. The upper hanger is provided with at least two groups of upper linear modules fixed to the bottom of the hanger box beam along the first direction and arranged in parallel with each other and spaced apart. The two groups of upper linear modules are used to drive the lower hanger to reciprocate along the first direction. The lower hanger is provided with lower linear modules slidably connected to each upper linear module and arranged in parallel with each other and spaced apart along the second direction. The lower linear modules are used to drive the sling points to reciprocate along the second direction. The upper linear modules and the lower linear modules cooperate with each other to enable the plurality of sling points to move along the first direction and the second direction in the horizontal plane, thereby adjusting the relative positions of the plurality of sling points and adjusting the center of gravity of the suspended object on the sling. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 A top view of the structure of an embodiment of the present application;

[0032] Figure 2 This is a structural front view of an embodiment of the present application;

[0033] Figure 3 A side view of the structure of an embodiment of the present application;

[0034] Figure 4 This is a structural diagram of the upper linear module of an embodiment of the present application;

[0035] Figure 5 This is a schematic structural diagram of the lower linear module of an embodiment of the present application;

[0036] Figure 6 This is a structural front view of the lifting point of the sling according to an embodiment of the present application;

[0037] Figure 7 This is a structural side view of the lifting point of the sling according to an embodiment of the present application.

[0038] Reference numerals:

[0039] 10. Hanger box beam; 11. Longitudinal beam; 12. Cross beam; 20. Upper hanger; 21. Upper linear module; 22. First guide rail; 23. First slider; 24. First screw pair; 25. First motor; 30. Lower hanger; 31. Lower linear module; 32. Second guide rail; 33. Second slider; 34. Second screw pair; 35. Second motor; 40. Lifting point of sling; 41. Box-type ear plate seat; 42. Plug-in pin shaft; 43. Bushing; 44. Cylinder. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] An embodiment of the present application provides a transfer sling system for a heavy-duty gantry crane, which can solve the problem in the related art that the sling is difficult to match the lifting point of the suspended object or the center of gravity of the suspended object is seriously deviated from the center of the sling.

[0042] See also Figures 1 to 3 As shown, the embodiment of the present application provides a transfer sling system for a heavy-duty gantry crane, comprising:

[0043] The hanger box girder 10 includes multiple cross beams 12 and multiple longitudinal beams 11 welded to each other. The multiple cross beams 12 and multiple longitudinal beams 11 of the hanger box girder 10 are box beam structures welded from steel plates. The multiple cross beams 12 and multiple longitudinal beams 11 are connected to each other to form a hanger box girder 10 with a rectangular structure.

[0044] The upper hanger 20 includes at least two sets of parallel and spaced upper linear modules 21 fixed to the bottom of the hanger box beam 10 along a first direction (i.e., the Y-axis). The two sets of upper linear modules 21 are connected to the bottom of the longitudinal beam 11 via fasteners and move linearly independently of each other.

[0045] The lower hanger 30 includes lower linear modules 31 that are slidably connected to each group of upper linear modules 21 and are parallel to and spaced apart from each other along the second direction (i.e., the X-axis direction). Each group of upper linear modules 21 is slidably connected to two groups of lower linear modules 31 that are parallel to and spaced apart from each other, and each group of lower linear modules 31 moves linearly independently of each other.

[0046] Four sling points 40 are provided, each connected to a lower linear module 31 and moving along the length of the lower linear module 31. These four sling points 40 are used to connect and sling objects, achieving four-point lifting. Each of these sling points 40 is controlled by the lower linear module 31 and upper linear module 21 for movement in the X- and Y-axes.

[0047] The transfer hanger system for a heavy-duty gantry crane according to an embodiment of the present application comprises an upper hanger 20 and a lower hanger 30 on a hanger box beam 10, with multiple hanger points 40 provided on the lower hanger 30. The upper hanger 20 comprises at least two sets of parallel and spaced upper linear modules 21 fixed to the bottom of the hanger box beam 10 along a first direction. The two sets of upper linear modules 21 are used to drive the lower hanger 30 to reciprocate along the first direction.

[0048] The lower hanger 30 is equipped with lower linear modules 31 slidably connected to each upper linear module 21 and arranged parallel to and spaced apart from each other along the second direction. The lower linear modules 31 are used to drive the hanger points 40 to reciprocate in the second direction. The upper linear modules 21 and the lower linear modules 31 cooperate to enable the multiple hanger points 40 to move in the first and second directions within a horizontal plane.

[0049] When the embodiment of the present application is hoisting the object to be hoisted, the lower linear module 31 and the upper linear module 21 are used to move in the X-axis direction and the Y-axis direction according to the position of the lifting point of the object to be hoisted to adjust the relative positions of the four hoisting points 40, so that the four hoisting points 40 correspond to the lifting points of the object to be hoisted, and the center of gravity of the object to be hoisted on the hoist is adjusted to improve the stability and safety of the hoisting.

[0050] In some alternative embodiments: See Figures 2 to 4As shown, the present invention provides a transfer sling system for a heavy-duty gantry crane. The transfer sling system includes an upper linear module 21 comprising two mutually parallel and spaced first guide rails 22 fixed to the bottom of the hanger box beam 10. Two sets of mutually parallel and spaced lower linear modules 31 are slidably connected between the two first guide rails 22; and a first drive mechanism is provided for driving the two sets of lower linear modules 31 to move along the length direction of the first guide rails 22.

[0051] In the embodiment of the present application, two sets of upper linear modules 21 are provided. Each set of upper linear modules 21 is provided with a first guide rail 22 slidably connected to the lower linear module 31, and a first drive mechanism that drives the two sets of lower linear modules 31 slidably connected to each upper linear module 21 to move along the length direction of the first guide rail 22. Driven by the first drive mechanism, the two sets of lower linear modules 31 move linearly along the Y-axis direction on the first guide rail 22.

[0052] In some alternative embodiments: See Figures 2 to 5 As shown, the present embodiment provides a transfer sling system for a heavy-duty gantry crane. The transfer sling system includes a first guide rail 22 having a guide groove formed therein. A first slider 23 is slidably connected within the guide groove. The first slider 23 is a T-shaped mechanism. The first slider 23 is partially positioned within the guide groove of the first guide rail 22 and is slidably connected thereto. A lower linear module 31 is fixedly connected to the first slider 23 and is slidably connected thereto via the first slider 23.

[0053] The first drive mechanism of the upper linear module 21 includes a first motor 25. The output shaft of the first motor 25 is connected to a first screw assembly 24 extending along the length of the first guide rail 22. The first screw assembly 24 is connected to the lower linear module 31 and converts the rotational motion of the first motor 25 into linear motion that drives the lower linear module 31 on the first guide rail 22. The first motor 25 is preferably, but not limited to, a servo motor. The first motor 25 drives the first screw assembly 24 in forward and reverse motion, thereby driving the lower linear module 31 in linear motion on the upper linear module 21.

[0054] In some alternative embodiments: See Figures 2 to 6 As shown, the embodiment of the present application provides a transfer sling system for a heavy-duty gantry crane. The lower linear module 31 of the transfer sling system includes a second guide rail 32 and a second slider 33 that is adapted to and slidably connected to the second guide rail 32. The sling lifting point 40 is fixed to the second slider 33. A second drive mechanism is provided on the second guide rail 32 to drive the second slider 33 to move back and forth on the second guide rail 32.

[0055] In the embodiment of the present application, four lower linear modules 31 are provided. Each of the four lower linear modules 31 is equipped with a second guide rail 32 slidably connected to a hanger point 40, and a second drive mechanism that drives the hanger point 40 slidably connected to each lower linear module 31 to move along the length direction of the second guide rail 32. Driven by the second drive mechanism of each of the four lower linear modules 31, the four hanger points 40 move linearly along the X-axis on the second guide rail 32.

[0056] In some alternative embodiments: See Figure 5 and Figure 6 As shown, an embodiment of the present application provides a transfer sling system for a heavy-duty gantry crane. The second drive mechanism of the transfer sling system includes a second motor 35. The output shaft of the second motor 35 is connected to a second screw pair 34 extending along the length of the second guide rail 32. The second screw pair 34 is connected to the second slider 33 and converts the rotational motion of the second motor 35 into linear motion that drives the second slider 33 on the second guide rail 32. The second motor 35 is preferably, but not limited to, a servo motor. The second motor 35 drives the second screw pair 34 in forward and reverse motion, thereby driving the sling lifting point 40 in linear motion on the lower linear module 31.

[0057] In some alternative embodiments: See Figure 6 and Figure 7 As shown, the embodiment of the present application provides a transfer sling system for a heavy-duty gantry crane. The sling lifting point 40 of the transfer sling system includes a box-type ear plate seat 41 with a downward opening. The box-type ear plate seat 41 is provided with a latch hole. A plug-in pin 42 that passes through the box-type ear plate seat 41 is plugged into and connected to the latch hole. A shaft sleeve 43 is connected to the box-type ear plate seat 41. The plug-in pin 42 slides in the shaft sleeve 43. The end of the shaft sleeve 43 away from the box-type ear plate seat 41 is provided with a cylinder 44 that drives the plug-in pin 42 to slide in the shaft sleeve 43.

[0058] The lifting point 40 of the sling in this embodiment is fixed to the second slide block 33 of the lower linear module 31 via a box-type lug seat 41. The box-type lug seat 41 has a bell-shaped structure, which facilitates the mating of the lifting point of the object being hoisted. The plug-in pin 42 is used to connect the lifting point of the object being hoisted to the box-type lug seat 41. The oil cylinder 44 drives the plug-in pin 42 to slide within the shaft sleeve 43 through telescopic movement, thereby achieving the locking and loosening of the plug-in pin 42 and the lifting point of the object being hoisted.

[0059] In some alternative embodiments: See Figure 1As shown, an embodiment of the present application provides a transfer sling system for a heavy-duty gantry crane. The upper linear module 21 of the transfer sling system is arranged along the length direction of the hanger box girder 10, and the lower linear module 31 is arranged along the width direction of the hanger box girder 10. The length of the lower linear module 31 slidably connected to one set of upper linear modules 21 is shorter than the length of the lower linear module 31 slidably connected to the other set of upper linear modules 21. As a result, the longer lower linear module 31 drives the sling lifting point 40 connected to it to adjust to the middle position of the hanger box girder 10, facilitating a two-point lifting operation in the middle position of the hanger box girder 10.

[0060] How it works

[0061] An embodiment of the present application provides a transfer sling system for a heavy-duty gantry crane. Since the transfer sling system for a heavy-duty gantry crane of the present application is provided with a hanger box beam 10, the hanger box beam 10 includes a plurality of cross beams 12 and a plurality of longitudinal beams 11 welded to each other, and the plurality of cross beams 12 and the plurality of longitudinal beams 11 are connected to each other to form a hanger box beam 10 with a rectangular structure; an upper hanger 20, the upper hanger 20 includes at least two groups of upper linear modules 21 fixed to the bottom of the hanger box beam 10 along a first direction and parallel to each other and spaced apart; a lower hanger 30, the lower hanger 30 includes lower linear modules 31 slidably connected to each upper linear module 21 and parallel to each other and spaced apart along a second direction; a sling hanging point 40, a plurality of sling hanging points 40 are provided, and the plurality of sling hanging points 40 are respectively connected to each lower linear module 31 and move along the length direction of the lower linear module 31.

[0062] Therefore, the transfer sling system for a heavy-duty gantry crane of the present application is provided with an upper sling 20 and a lower sling 30 on a sling box girder 10, and a plurality of sling points 40 on the lower sling 30. The upper sling 20 is provided with at least two sets of upper linear modules 21 fixed to the bottom of the sling box girder 10 along a first direction, parallel to each other and spaced apart. The two sets of upper linear modules 21 are used to drive the lower sling 30 to reciprocate in the first direction. The lower sling 30 is provided with lower linear modules 31 slidably connected to each upper linear module 21 and spaced apart along a second direction, parallel to each other. The lower linear modules 31 are used to drive the sling points 40 to reciprocate in the second direction. The upper and lower linear modules 21 cooperate with each other to enable the plurality of sling points 40 to move in the first and second directions within a horizontal plane, thereby adjusting the relative positions of the plurality of sling points 40 and the center of gravity of the load being slung on the sling.

[0063] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0064] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0065] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A transfer sling system for heavy-duty gantry crane, characterized in that: include: A hanger box girder (10), the hanger box girder (10) comprising a plurality of cross beams (12) and a plurality of longitudinal beams (11) welded to each other, wherein the plurality of cross beams (12) and the plurality of longitudinal beams (11) are connected to each other to form a hanger box girder (10) having a rectangular structure; An upper hanger (20), the upper hanger (20) comprising at least two sets of upper linear modules (21) that are parallel to each other and spaced apart and fixed to the bottom of the hanger box beam (10) along a first direction; A lower hanger (30), the lower hanger (30) comprising lower linear modules (31) slidably connected to each of the upper linear modules (21) and arranged parallel to each other and spaced apart along the second direction; A sling hanging point (40), wherein a plurality of sling hanging points (40) are provided, and the plurality of sling hanging points (40) are respectively connected to each of the lower linear modules (31) and move along the length direction of the lower linear module (31).

2. A transfer sling system for a heavy-duty gantry crane according to claim 1, characterized in that: The upper linear module (21) comprises two first guide rails (22) fixed to the bottom of the hanger box beam (10) and arranged parallel to each other and spaced apart; Two sets of lower linear modules (31) that are parallel to each other and spaced apart are slidably connected between the two first guide rails (22); And, a first driving mechanism for respectively driving the two groups of the lower linear modules (31) to move along the length direction of the first guide rail (22).

3. The transfer sling system for a heavy-duty gantry crane according to claim 2, characterized in that: A guide groove is provided on the first guide rail (22), a first slider (23) is slidably connected in the guide groove, and the first slider (23) is a "T"-shaped mechanism; The first sliding block (23) is partially located in the guide groove of the first guide rail (22) and is slidably connected to the first guide rail (22); The lower linear module (31) is fixedly connected to the first slider (23), and is slidably connected to the first guide rail (22) via the first slider (23).

4. The transfer sling system for a heavy-duty gantry crane according to claim 2, characterized in that: The first driving mechanism comprises a first motor (25), the output shaft of the first motor (25) being connected to a first screw rod pair (24) extending along the length direction of the first guide rail (22); The first screw rod pair (24) is connected to the lower linear module (31) and converts the rotational motion of the first motor (25) into linear motion to drive the lower linear module (31) on the first guide rail (22).

5. A transfer sling system for a heavy-duty gantry crane according to claim 1 or 2, characterized in that: The lower linear module (31) includes a second guide rail (32) and a second slider (33) adapted to and slidably connected with the second guide rail (32), and the sling lifting point (40) is fixed on the second slider (33); The second guide rail (32) is provided with a second driving mechanism for driving the second slider (33) to move back and forth on the second guide rail (32).

6. The transfer sling system for a heavy-duty gantry crane according to claim 5, characterized in that: The second driving mechanism comprises a second motor (35), the output shaft of the second motor (35) being connected to a second screw rod pair (34) extending along the length direction of the second guide rail (32); The second screw pair (34) is connected to the second slider (33) and converts the rotational motion of the second motor (35) into linear motion to drive the second slider (33) on the second guide rail (32).

7. The transfer sling system for a heavy-duty gantry crane according to claim 1, characterized in that: The lifting point (40) of the sling comprises a box-type ear plate seat (41) with an opening facing downwards, a plug hole is provided on the box-type ear plate seat (41), and a plug-in pin shaft (42) passing through the box-type ear plate seat (41) is plugged and connected in the plug hole.

8. The transfer sling system for a heavy-duty gantry crane according to claim 7, characterized in that: The box-type ear plate seat (41) is connected to a shaft sleeve (43), the plug-in pin shaft (42) slides in the shaft sleeve (43), and an oil cylinder (44) is provided at one end of the shaft sleeve (43) away from the box-type ear plate seat (41) for driving the plug-in pin shaft (42) to slide in the shaft sleeve (43).

9. The transfer sling system for a heavy-duty gantry crane according to claim 1, characterized in that: The upper linear module (21) is arranged along the length direction of the hanger box beam (10), and the lower linear module (31) is arranged along the width direction of the hanger box beam (10); The length of the lower linear module (31) slidably connected to one group of the upper linear modules (21) is smaller than the length of the lower linear module (31) slidably connected to the other group of the upper linear modules (21).

10. The transfer sling system for a heavy-duty gantry crane according to claim 1, characterized in that: The multiple transverse beams (12) and the multiple longitudinal beams (11) of the hanger box beam (10) are all box beam structures formed by welding steel plates.

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