Lifting device and crane

Abstract

The present application discloses a sling device and a crane, which relate to the technical field of lifting equipment. The sling device includes a combined beam frame assembly, two first counterweight assemblies and a second counterweight assembly; the two first counterweight assemblies are respectively suspended at both ends of the combined beam frame assembly along the width direction, and the two first counterweight assemblies are symmetrical about a first plane passing through the connection between the combined beam frame assembly and the lifting rope, and the first plane is parallel to the cross section of the combined beam frame assembly along the width direction; the second counterweight assembly is suspended on the combined beam frame assembly and is located between the two first counterweight assemblies, and the center of gravity of the second counterweight assembly is located in the first plane; wherein, along the width direction of the combined beam frame assembly, the width of the second counterweight assembly is greater than the width of the first counterweight assembly. The sling device disclosed in the present application can meet the working condition test requirements of various different lifting loads of a thousand-ton crawler crane, ensuring the accuracy of the test data, safety and reliability.

Description

Technical Field

[0001] The present application relates to the technical field of lifting equipment, and in particular, to a sling device and a crane. Background Art

[0002] With the continuous development of the infrastructure field, the tonnage of crawler cranes is getting bigger and bigger, and the lifting capacity is also increasing. After the design of large-tonnage crawler cranes is completed, each crawler crane usually needs to undergo a lifting condition test during the prototype test according to the product overload design requirements. However, the lifting condition test requires that the lifting capacity of the crawler crane must reach 1.25 times the product's calibrated lifting capacity. Therefore, the load capacity of the combined sling selected for the crawler crane lifting condition test must far exceed the product's own overload capacity.

[0003] The existing technology uses a sling formed by a simple combination of multiple weight racks, weight blocks, and beams to cope with the load condition test of large-tonnage crawler cranes. However, in the load condition test of a thousand-ton crawler crane, due to the diversity of arm combinations, a variety of different load condition tests need to be carried out. The sling combination sling provided by the existing technology cannot be matched, and cannot be used for overload load capacity and overload load condition tests, so accurate test data cannot be obtained. Summary of the invention

[0004] The purpose of the present application is to provide a sling device and a crane to solve the deficiencies in the prior art.

[0005] To achieve the above objectives, in a first aspect, the present application provides a sling device, comprising:

[0006] A modular beam assembly for connection with the crane's hoisting rope;

[0007] Two first counterweight assemblies are respectively suspended at two ends of the combined beam assembly in the width direction, the two first counterweight assemblies are symmetrical about a first plane passing through the connection between the combined beam assembly and the suspension rope, and the first plane is parallel to the cross section of the combined beam assembly in the width direction; and

[0008] a second counterweight assembly, suspended on the combined beam assembly and located between the two first counterweight assemblies, wherein the center of gravity of the second counterweight assembly is located in the first plane;

[0009] Wherein, along the width direction of the combined beam assembly, the width of the second counterweight assembly is greater than the width of the first counterweight assembly.

[0010] As a further improvement of the above technical solution:

[0011] In combination with the first aspect, in a possible implementation manner, the ends of the first counterweight assembly and the second counterweight assembly away from the combined beam assembly are flush in a second plane, and the second plane is perpendicular to the first plane.

[0012] In combination with the first aspect, in a possible implementation, the second counterweight assembly includes at least two counterweight modules, at least two of the counterweight modules are respectively suspended on the combined beam assembly, and at least two of the counterweight modules are arranged in a mirror image with respect to the first plane.

[0013] In combination with the first aspect, in a possible implementation manner, the counterweight module includes:

[0014] A counterweight frame is arranged below the combined beam frame assembly;

[0015] A first connecting assembly, one end of which is connected to the combined beam frame assembly, and the other end of which is connected to the counterweight frame; and

[0016] A preset number of counterweight blocks are stacked on the counterweight rack.

[0017] In combination with the first aspect, in a possible implementation manner, the first connection assembly includes a first connection pull plate, a first transition pull plate and a balance frame connected in sequence;

[0018] The first connecting pull plate is connected to the combined beam frame assembly, and the balancing frame is connected to the counterweight frame.

[0019] In combination with the first aspect, in a possible implementation manner, the balance frame is a quadrangular pyramid truss structure, the top corner of the balance frame is connected to the first transition pull plate, and the four bottom corners of the balance frame are respectively connected to the counterweight frame.

[0020] In combination with the first aspect, in a possible implementation manner, the first transition pull plate is a double pull plate structure.

[0021] In combination with the first aspect, in a possible implementation manner, the first counterweight assembly includes:

[0022] A weight rack is arranged below the combined beam frame assembly;

[0023] A second connecting assembly, one end of which is connected to the combined beam frame assembly, and the other end of which is connected to the weight frame; and

[0024] In combination with the first aspect, in a possible implementation manner, a preset number of weight blocks are stacked on the weight rack.

[0025] The combined beam frame assembly comprises:

[0026] A composite beam body comprises a plurality of support plates arranged in parallel at equal intervals; and

[0027] Two panel covers are respectively arranged at two ends of the combined beam body and are connected to the combined beam body by bolts.

[0028] To achieve the above-mentioned purpose, in a second aspect, the present application further provides a crane, comprising a crane body and the sling device provided in the above-mentioned first aspect.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present application provides a hoisting device and a crane, wherein the hoisting device adopts a combined beam frame assembly. Compared with a welded structure, there is no weld cracking when conducting a large-tonnage overload hoisting condition test. The hoisting device is safer and more reliable in use, and can carry heavier weights.

[0031] Since the width of the second counterweight assembly is greater than that of the first counterweight assembly along the width direction of the combined beam assembly, a "cross-bearing" structure is formed below the combined beam assembly, and the first counterweight assembly and the second counterweight assembly are reasonably arranged so that the loads at both ends of the combined beam assembly are the same, so that the center of gravity of the entire sling device is always in the first plane with the sling rope and in the same vertical direction, effectively controlling the balance of the front and rear and left and right lifting weights of the sling device to meet the working condition test requirements of various different lifting loads of 1,000-ton crawler cranes. Furthermore, it can ensure the overload load capacity of super-large crawler cranes and the accuracy of overload lifting working condition test data, and prevent the problem of eccentric loading and safety accidents of product tilting during the lifting test.

[0032] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present application. It should be understood that the following drawings only show certain embodiments of the present application and should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work. In the drawings:

[0034] Figure 1 A front view of a sling device provided in an embodiment of the present application is shown;

[0035] Figure 2 Shows Figure 1 a side view of the spreader device shown;

[0036] Figure 3A schematic diagram showing the position of the sling device provided in an embodiment of the present application relative to the crane arrangement is shown;

[0037] Figure 4 Shows Figure 1 A front view of a partial structure of a first connecting assembly and a second connecting assembly installed on a combined beam frame assembly in the sling device shown;

[0038] Figure 5 Shows Figure 4 A side view of a partial structure of a first connecting assembly and a second connecting assembly mounted on the combined beam frame assembly, and a balancing frame is schematically shown;

[0039] Figure 6 A schematic structural diagram of an adapter frame in a first connection assembly provided in an embodiment of the present application is shown.

[0040] Description of reference numerals:

[0041] 10. Crane; 100. Combined beam frame assembly; 110. Wire rope transition device; 120. Combined beam body; 130. Panel cover; 200. First counterweight assembly; 210. Weight frame; 220. Second connecting assembly; 221. Second connecting plate; 222. Second transition plate; 223. Connecting frame; 224. Third transition plate; 230. Weight block; 300. Second counterweight assembly; 300a. Counterweight module; 310. Counterweight frame; 320. First connecting assembly; 321. First connecting plate; 322. First transition plate; 323. Balancing frame; 324. Adapter frame; 3240. First frame; 3241. Second frame; 330. Counterweight block;

[0042] M1, first plane; M2, second plane. DETAILED DESCRIPTION

[0043] The specific implementation of the embodiment of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present application, and is not used to limit the embodiment of the present application.

[0044] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0045] In the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "width", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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 the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.

[0049] Embodiment 1

[0050] See also Figure 1 , Figure 2 and Figure 3 This embodiment provides a sling device, which is applied to a crane 10 and is used for a loading condition test of the crane 10.

[0051] In this embodiment, the sling device includes a combined beam frame assembly 100, two first counterweight assemblies 200 and a second counterweight assembly 300. The combined beam frame assembly 100 is used to connect with the lifting rope (not shown) of the crane 10, and the two first counterweight assemblies 200 and the second counterweight assembly 300 are both suspended below the combined beam frame assembly 100.

[0052] Specifically, the combined beam frame assembly 100 includes a wire rope transition device 110, a combined beam body 120 and two panel covers 130. The combined beam body 120 includes a plurality of support plates (not shown) arranged in parallel at equal intervals, and the plurality of support plates are fixed by bolts. Therefore, it can be understood that in this embodiment, the combined beam body 120 is assembled in a non-welded connection manner, so there will be no weld cracking during the hoisting working condition test, and the bearing capacity is stronger.

[0053] The wire rope transition device 110 is connected to the combined beam body 120 by bolts. When lifting, the lifting rope of the crane 10 passes through the wire rope transition device 110 to connect the combined beam frame assembly 100 for easy lifting.

[0054] The two panel covers 130 are respectively covered at both ends of the combined beam body 120. The two panel covers 130 are bolted to the combined beam body 120. The two panel covers 130 can stabilize the combined beam body 120 to limit the shaking or displacement of the outer support plate of the combined beam body 120.

[0055] The two first counterweight assemblies 200 are respectively suspended on the side of the combined beam body 120 in the combined beam frame assembly 100 away from the wire rope transition device 110, that is, the side of the combined beam body 120 facing downward. And the two first counterweight assemblies 200 are located at both ends of the combined beam body 120 in the width direction.

[0056] In this embodiment, the weights of the two first counterweight assemblies 200 are identical, and the two first counterweight assemblies 200 are symmetrical about a first plane M1 passing through the connection between the combined beam frame assembly 100 and the suspension rope, wherein the first plane M1 is parallel to the cross section of the combined beam body 120 along the width direction.

[0057] The second counterweight assembly 300 is suspended on the side of the combined beam body 120 in the combined beam frame assembly 100 away from the wire rope transition device 110. The second counterweight assembly 300 is located between the two first counterweight assemblies 200, and the center of gravity of the second counterweight assembly 300 is located in the first plane M1. Figure 3 The width of the second counterweight assembly 300 is greater than the width of the first counterweight assembly 200. It can be understood that when the load is being hoisted, Figure 3 As shown, the space between the two first counterweight assemblies 200 corresponds to the space between the two track wheels of the crane 10. Therefore, under the premise of not interfering with the two track wheels and the crane 10, the space between the two first counterweight assemblies 200 can be reasonably utilized by increasing the width of the second counterweight assembly 300 so that the second counterweight assembly 300 can meet a greater weight requirement.

[0058] In some embodiments, Figure 3 As shown, along the length direction of the composite beam body 120 (such as Figure 3 The width of the second counterweight assembly 300 is smaller than the distance between the two track wheels of the crane 10 to avoid interference with the crane 10 during lifting.

[0059] Furthermore, during lifting, the ends of the first counterweight assembly 200 and the second counterweight assembly 300 away from the modular beam assembly 100 are flush in the second plane M2, wherein the second plane M2 is perpendicular to the first plane M1, and the second plane M2 is parallel to the ground.

[0060] This embodiment also provides a crane 10. The crane 10 includes a crane body and the above-mentioned lifting device. When performing a lifting condition test, the lifting rope on the crane body passes through the wire rope transition device 110 to connect the combined beam frame assembly 100. The lifting rope is a wire rope for lifting.

[0061] Optionally, the crane 10 is a crawler crane, specifically a thousand-ton crawler crane.

[0062] Compared with the prior art, the sling device provided in this embodiment adopts a combined beam frame assembly 100. Compared with the welded structure, there is no weld cracking when conducting a large-tonnage overload lifting condition test. It is safer and more reliable to use, and can carry heavier weights and has a longer service life.

[0063] Furthermore, since the width of the second counterweight assembly 300 is greater than that of the first counterweight assembly 200 along the width direction of the combined beam body 120, a "cross-bearing" structure is formed below the combined beam frame assembly 100. By reasonably arranging the first counterweight assembly 200 and the second counterweight assembly 300, the loads at both ends of the combined beam frame assembly 100 are the same, so that the center of gravity of the entire sling device is always in the first plane M1 with the sling rope and in the same vertical direction, effectively controlling the balance of the front and rear and left and right lifting weights of the sling device to meet the working condition test requirements of various different lifting loads.

[0064] Therefore, by reasonably configuring the weights of the two first counterweight assemblies 200 and the second counterweight assemblies 300, the sling device provided in this embodiment can carry a weight of thousands of tons to meet the overload hoisting condition test of a thousand-ton crawler crane. Since the sling device has good stability, good balance, high reliability, and high weight-bearing capacity, the overload load capacity of the super-large crawler crane and the accuracy of the overload hoisting condition test data can be ensured, and the unbalanced load problem and product tilting safety accidents that occur during the hoisting test can be prevented.

[0065] Embodiment 2

[0066] See also Figure 1 This embodiment provides a sling device, which is applied to a crane and used for a crane hoisting condition test. This embodiment is an improvement made on the technical basis of the above embodiment 1. Compared with the above embodiment 1, the difference is that:

[0067] In this embodiment, the second counterweight assembly 300 includes at least two counterweight modules 300a. Specifically, in order to more clearly describe the technical solution of the present application, two counterweight modules 300a are used as an example for illustration. The two counterweight modules 300a are respectively suspended on the combined beam body 120, and the two counterweight modules 300a are arranged in a mirror image with respect to the first plane M1. Therefore, in this embodiment, the two counterweight modules 300a have the same structure and weight.

[0068] See also Figure 1 , Figure 4 and Figure 5 Specifically, the two counterweight modules 300a each include a counterweight frame 310, a first connecting assembly 320 and a preset number of counterweight blocks 330.

[0069] The counterweight frame 310 is arranged below the combined beam frame assembly 100. One end of the first connecting assembly 320 is connected to the combined beam frame assembly 100, and the other end is connected to the counterweight frame 310. A preset number of counterweight blocks 330 are stacked on the counterweight frame 310. Therefore, it can be understood that the weight of the entire counterweight module 300a can be adjusted by adding or removing the counterweight blocks 330.

[0070] Specifically, the first connection assembly 320 includes a first connection plate 321, a first transition plate 322 and a balance frame 323. The first connection plate 321 is connected to the combined beam body 120 in the combined beam frame assembly 100 through a bolt assembly, and can also be hinged through a pin shaft.

[0071] One end of the first transition plate 322 is connected to the first connection plate 321, and the other end is connected to the balance frame 323. The balance frame 323 is connected to the counterweight frame 310 at one end away from the first transition plate 322. The first transition plate 322 is used to ensure that the height of the counterweight frame 310 is matched with the first counterweight assembly 200.

[0072] See also Figure 1 , Figure 3 , Figure 4 and Figure 6, further, in order to reasonably utilize the space between the two first counterweight assemblies 200, ensure that the second counterweight assembly 300 can be equipped with a heavier weight. Specifically, in the present embodiment, an adapter frame 324 is installed between the first connecting plate 321 and the first transition plate 322. Through the adapter frame 324, the placement direction of the counterweight frame 310 is changed from longitudinal to transverse arrangement, thereby reducing the space occupied by the counterweight module 300a between the two first counterweight assemblies 200, making the overall structure of the sling device more compact. As a result, the counterweight module 300a is arranged transversely; in addition, in the present embodiment, the two first counterweight assemblies 200 are arranged longitudinally so that the first counterweight assembly 200 and the second counterweight assembly 300 form a "cross-bearing" structure (please refer to Figure 3 ).

[0073] In this embodiment, the adapter frame 324 includes a first frame body 3240 and a second frame body 3241 connected to each other, and one end of the first frame body 3240 away from the second frame body 3241 is hinged to the first connecting plate 321 through a pin, and one end of the second frame body 3241 away from the first frame body 3240 is hinged to the first transition plate 322 through a pin. Among them, the axis direction of the pin at the hinge between the first frame body 3240 and the first connecting plate 321 is parallel to the first plane M1, and the axis direction of the pin at the hinge between the second frame body 3241 and the first transition plate 322 and the first frame body 3240 and the first connecting plate 321 is perpendicular to the first plane M1. Therefore, the placement direction of the counterweight frame 310 can be adjusted through the adapter frame 324, and the space can be reasonably used to ensure that the second counterweight assembly 300 can be equipped with heavier weight.

[0074] Furthermore, the balancing frame 323 is a quadrangular pyramid truss structure, the top corner of the balancing frame 323 is connected to the first transition pull plate 322, and the four bottom corners of the balancing frame 323 are respectively hinged to the counterweight frame 310 through pins. Since the balancing frame 323 is a quadrangular pyramid truss structure, the four faces of the balancing frame 323 are all triangles, which has better stability to balance the entire counterweight module 300a.

[0075] Optionally, in this embodiment, the first transition pull plate 322 is a double pull plate structure, that is, the double pull plate structure is composed of two pull plates, and can bear a greater weight.

[0076] Optionally, the counterweight frame 310 and the counterweight block 330 can be taken from the balance counterweight of other cranes 10, thereby eliminating the need to design an additional set of counterweight frame 310 and counterweight block 330, greatly reducing the test cost.

[0077] See also Figure 1 , Figure 2 and Figure 4In this embodiment, the first counterweight assembly 200 includes a weight rack 210, a second connecting assembly 220 and a preset number of weight blocks 230. The weight rack 210 is arranged below the combined beam frame assembly 100. One end of the second connecting assembly 220 is connected to the combined beam frame assembly 100, and the other end is connected to the weight rack 210. A preset number of weight blocks 230 are stacked on the weight rack 210, so that the weight of the entire first counterweight assembly 200 can be adjusted by adding or removing the weight blocks 230.

[0078] The second connection assembly 220 includes a second connection plate 221, a second transition plate 222 and a connection frame 223. One end of the second connection plate 221 is hinged to the composite beam body 120 through a pin, and the other end is hinged to the second transition plate 222 through a pin. The end of the second transition plate 222 away from the second connection plate 221 is hinged to the connection frame 223 through a pin.

[0079] In this embodiment, the connecting frame 223 is a triangular structure, the top corner of the connecting frame 223 is hinged to the second transition pull plate 222 via a pin, and the two bottom corners of the connecting frame 223 are respectively connected to the weight frame 210 .

[0080] It can be understood that the present embodiment uses the first transition pull plate 322 and the second transition pull plate 222 to keep the hanging heights of the counterweight frame 310 and the weight frame 210 consistent, specifically, to make the bottoms of the counterweight frame 310 and the weight frame 210 flush in the second plane M2, thereby ensuring the stability of the entire sling device during lifting and lowering.

[0081] Furthermore, since the cross-sectional dimension of the second transition plate 222 is relatively small, in this embodiment, the second connecting plate 221 is a variable diameter plate, that is, along the vertical direction, the width of the second connecting plate 221 gradually decreases from the combined beam body 120 to the second transition plate 222 .

[0082] In some embodiments, when the length of the second transition plate 222 is insufficient, a third transition plate 224 may be disposed between the second transition plate 222 and the second connecting plate 221 .

[0083] See also Figures 1 to 6 The installation steps of the sling device provided in this embodiment are as follows:

[0084] The first step is to connect the wire rope transition device to the combined beam body 120, and pass the lifting rope around the wire rope transition device.

[0085] In the second step, the first connecting plate 321 and the second connecting plate 221 are installed on the combined beam body 120 , and then two panel covers 130 are installed.

[0086] In the second step, firstly, the second transition plates 222 are respectively installed under the two second connection plates 221 , and then the first transition plates 322 are respectively installed under the two first connection plates 321 , so as to ensure balance.

[0087] In the third step, the connecting frames 223 are respectively installed under the two second transition pull plates 222 , and then the balancing frames 323 are respectively installed under the two first transition pull plates 322 .

[0088] In the fourth step, the weight racks 210 are installed respectively under the two connecting racks 223 , and then the counterweight racks 310 are installed respectively under the two balancing racks 323 .

[0089] In the fifth step, according to the requirements of the hoisting working condition test, a preset number of weight blocks 230 are stacked on the weight rack 210, and a preset number of counterweight blocks 330 are stacked on the counterweight rack 310 to wait for the test.

[0090] The above describes in detail the optional implementation methods of the embodiments of the present application in combination with the accompanying drawings. However, the embodiments of the present application are not limited to the specific details in the above implementation methods. Within the technical concept of the embodiments of the present application, various simple modifications can be made to the technical scheme of the embodiments of the present application, and these simple modifications all belong to the protection scope of the embodiments of the present application.

[0091] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the embodiments of the present application will not further describe various possible combinations.

[0092] In addition, the various implementation methods of the embodiments of the present application may be arbitrarily combined, and as long as they do not violate the ideas of the embodiments of the present application, they should also be regarded as the contents disclosed in the embodiments of the present application.

Claims

1. A sling device, characterized in that: include: A combined beam frame assembly (100) is used to be connected to a hoisting rope of a crane, the combined beam frame assembly (100) comprising a combined beam body (120) and two panel covers (130); the combined beam body (120) comprises a plurality of support plates arranged in parallel at equal intervals, and the two panel covers (130) are respectively covered at two ends of the combined beam body (120) and are bolted to the combined beam body (120); Two first counterweight assemblies (200) are respectively suspended at two ends of the combined beam assembly (100) in the width direction, the two first counterweight assemblies (200) are symmetrical about a first plane (M1) passing through the connection between the combined beam assembly (100) and the suspension rope, and the first plane (M1) is parallel to a cross section of the combined beam assembly (100) in the width direction; and A second counterweight assembly (300) is suspended on the combined beam assembly (100) and is located between the two first counterweight assemblies (200), and the center of gravity of the second counterweight assembly (300) is located in the first plane (M1); Wherein, along the width direction of the combined beam frame assembly (100), the width of the second counterweight assembly (300) is greater than the width of the first counterweight assembly (200).

2. The sling device according to claim 1, characterized in that: One end of the first counterweight assembly (200) and the second counterweight assembly (300) away from the combined beam frame assembly (100) are flush in a second plane (M2), and the second plane (M2) and the first plane (M1) are perpendicular to each other.

3. The sling device according to claim 1, characterized in that: The second counterweight assembly (300) comprises at least two counterweight modules (300a), at least two of the counterweight modules (300a) are respectively suspended on the combined beam frame assembly (100), and at least two of the counterweight modules (300a) are arranged in a mirror image with respect to the first plane (M1).

4. The sling device according to claim 3, characterized in that: The counterweight module (300a) comprises: A counterweight frame (310) is arranged below the combined beam frame assembly (100); A first connection assembly (320), one end of which is connected to the combined beam frame assembly (100) and the other end of which is connected to the counterweight frame (310); and A preset number of counterweight blocks (330) are stacked on the counterweight rack (310).

5. The sling device according to claim 4, characterized in that: The first connection assembly (320) comprises a first connection pull plate (321), a first transition pull plate (322) and a balance frame (323) which are connected in sequence; The first connecting pull plate (321) is connected to the combined beam frame assembly (100), and the balancing frame (323) is connected to the counterweight frame (310).

6. The sling device according to claim 5, characterized in that: The balancing frame (323) is a quadrangular pyramid truss structure, the top corner of the balancing frame (323) is connected to the first transition pull plate (322), and the four bottom corners of the balancing frame (323) are respectively connected to the counterweight frame (310).

7. The sling device according to claim 5, characterized in that: The first transition pull plate (322) is a double pull plate structure.

8. The sling device according to claim 1, characterized in that: The first counterweight assembly (200) comprises: A weight rack (210) is arranged below the combined beam frame assembly (100); A second connection assembly (220), one end of which is connected to the combined beam frame assembly (100) and the other end of which is connected to the weight frame (210); and A preset number of weight blocks (230) are stacked on the weight rack (210).

9. A crane, characterized in that: It comprises a crane body and a lifting device according to any one of claims 1-8.

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