Hoist counterweight lifting cylinder pull frame and hoist

Abstract

The application relates to the technical field of crane structure, and discloses a crane counterweight lifting oil cylinder pulling frame and crane, which comprises a jacking assembly, the jacking assembly comprises a jacking part, a lifting beam, a chain and a limiting assembly, the jacking part is provided with a lifting head and a fixing base, the fixing base is suitable for being installed on a main rotating platform of the crane; the middle part of the lifting beam is hinged to the lifting head, and the two ends of the lifting beam are respectively connected with the counterweight assembly through the chain; the limiting assembly is connected with the lifting beam, and the limiting assembly is in limiting contact with the lifting head in the rotating direction of the lifting beam relative to the lifting head, so that the problem of difficult installation of the counterweight block is solved or improved.

Description

Technical Field

[0001] This application relates to the field of crane structure technology, specifically to a crane counterweight lifting cylinder lifting frame and a crane. Background Technology

[0002] The counterweight of a crane mainly serves a balancing function. Its core function is to balance the overturning moment generated by the boom and the load, preventing the crane from tipping forward during operation, thereby ensuring the stability of the whole machine and operational safety.

[0003] In related technologies, the counterweights and counterweight trays of cranes are generally made of welded steel plates filled with a mixture of ores, iron sand and concrete of different densities. This causes the center of gravity of the counterweight to deviate from the design. During the lifting and installation of the counterweight, the lifting frame rotates due to the change in the center of gravity of the counterweight, making it impossible to lift the counterweight vertically and causing installation difficulties. Utility Model Content

[0004] This application provides a crane counterweight lifting cylinder lifting frame and a crane to solve or improve the problem of difficult counterweight installation.

[0005] In a first aspect, this application provides a crane counterweight lifting cylinder lifting frame, including a lifting assembly, which includes a lifting component, a lifting beam, a chain, and a limiting assembly, as detailed below. The lifting component has a lifting head and a fixed seat, the fixed seat being adapted to be installed on the main turntable of the crane; the middle part of the lifting beam is hinged to the lifting head, and the two ends of the lifting beam are adapted to be connected to the counterweight assembly via the chain; the limiting assembly is connected to the lifting beam, and the limiting assembly makes limiting contact with the lifting head about the rotation direction of the lifting beam relative to the lifting head.

[0006] Beneficial effects: The lifting beam is rotatably connected to the lifting head of the jacking component. The two ends of the lifting beam are connected to the counterweight via chains. The limiting component makes contact with the lifting head in the direction of rotation of the lifting beam relative to the lifting head. During the lifting of the counterweight, the limiting component can restrict the rotation of the lifting beam relative to the lifting head, thereby preventing the counterweight from swaying around the rotation axis of the lifting beam and the lifting head, ensuring that the counterweight is lifted vertically, facilitating the alignment of the counterweight with the connection structure of the main turntable, reducing installation difficulty, and improving installation efficiency.

[0007] In one optional embodiment, the limiting assembly includes multiple limiting components, and at least one of the limiting components is provided on both sides of the lifting head along the rotation direction of the lifting beam relative to the lifting head.

[0008] In one optional implementation, the limiting component is a limiting pin.

[0009] In one optional embodiment, the lifting beam includes a first end plate, a second end plate, and a connecting plate: the first end plate has a first slot; the second end plate is spaced apart from the first end plate, the lifting head is located between the first end plate and the second end plate, the lifting head is rotatably connected to the first end plate and the second end plate via a first rotating shaft, the second end plate has a second slot, the second slot and the first slot are coaxially arranged along the axial direction of the first rotating shaft; the connecting plate is located between the first end plate and the second end plate, and the connecting plate is connected to the first end plate and the second end plate; wherein, the limiting component is inserted through the first slot into the second slot, and the portion of the limiting component located between the first slot and the second slot is in limiting contact with the lifting head.

[0010] In one optional embodiment, the lifting beam further includes a first connecting cylinder and a second connecting cylinder, the first connecting cylinder and the second connecting cylinder being located between a first end plate and a second end plate, the first connecting cylinder and the second connecting cylinder being located at both ends of the lifting beam, the first connecting cylinder and the second connecting cylinder being connected to the first end plate and the second end plate respectively through a second rotating shaft, and the chain being hung on both the first connecting cylinder and the second connecting cylinder.

[0011] In one alternative embodiment, a thickened portion is provided in the middle of the first end plate, and the first slot passes through the thickened portion.

[0012] In one optional embodiment, the chain includes a main chain and a connecting buckle. The connecting buckle includes a first half buckle and a second half buckle. The two ends of the first half buckle are coaxially and rotatably connected to the two ends of the second half buckle, respectively. The first half buckle is fastened to the main chain, and the second half buckle is connected to the end of the lifting beam.

[0013] Secondly, this application also provides a crane, including a main turntable, a counterweight assembly, and a crane counterweight lifting cylinder lifting frame as described in any of the above embodiments. There are two lifting assemblies, which are respectively disposed on both sides of the main turntable. The fixed base is connected to the side of the main turntable. The counterweight assembly is connected to the chain.

[0014] Beneficial effects: Since the crane includes the crane counterweight lifting cylinder lifting frame, it has the same technical effects as the crane counterweight lifting cylinder lifting frame, so it will not be elaborated here.

[0015] In one optional embodiment, the counterweight assembly includes a counterweight tray and a plurality of counterweight blocks. A first connector is provided in the middle of the counterweight tray, and a second connector is provided at the bottom of the main turntable. The first connector and the second connector are detachably connected, and a plurality of the counterweight blocks are stacked on both sides of the counterweight tray.

[0016] In one alternative embodiment, the counterweight includes a first outer shell and a first filler, the first filler being located within the first outer shell, the first filler comprising at least two of ore, iron sand, and concrete; and / or, the counterweight tray includes a second outer shell and a second filler, the second filler being located within the second outer shell, the second filler comprising at least two of ore, iron sand, and concrete. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this application, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the cooperation structure between the crane counterweight lifting cylinder lifting frame, the main turntable, and the counterweight assembly according to an embodiment of this application. Figure 2 This is a schematic diagram of one side of the structure of the cooperation between the crane counterweight lifting cylinder lifting frame, the main turntable, and the counterweight assembly, according to an embodiment of this application. Figure 3 This is a schematic diagram of the structure on the other side of the cooperation between the crane counterweight lifting cylinder lifting frame, the main turntable, and the counterweight assembly, according to an embodiment of this application. Figure 4 This is a schematic diagram of the cooperation structure between the lifting beam and the lifting head in a crane counterweight lifting cylinder lifting frame according to an embodiment of this application; Figure 5 This is a schematic diagram of one side of the structure of the cooperation between the lifting beam and the lifting head in a crane counterweight lifting cylinder lifting frame according to an embodiment of this application; Figure 6 This is a schematic diagram of the other side of the structure of the cooperation between the lifting beam and the lifting head in a crane counterweight lifting cylinder lifting frame according to an embodiment of this application; Figure 7 This is a schematic diagram of one side of the lifting beam of a crane counterweight lifting cylinder lifting frame, after removing the first end plate and its connection with the lifting head, according to an embodiment of this application.

[0019] Explanation of reference numerals in the attached figures: 1. Lifting assembly; 2. Main turntable; 3. Counterweight assembly; 11. Lifting components; 12. Chain; 13. Lifting beam; 14. Limiting components; 111. Lifting head; 112. Fixed base; 121. Main chain; 122. Connecting buckle; 1221. First half buckle; 1222. Second half buckle; 131. First end plate; 1311. First slot; 1312. Thickened part; 132. Second end plate; 133. Connecting plate; 134. First rotating shaft; 135. First connecting cylinder; 136. Second connecting cylinder; 137. Second rotating shaft; 141. Limiting components; 21. Second connector; 31. Counterweight tray; 311. First connecting piece; 32. Counterweight block. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two elements. The terms "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, wherein the acceptable deviation range is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where an acceptable deviation range for approximate parallelism can be, for example, within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where an acceptable deviation range for approximate perpendicularity can also be, for example, within 5°. "Equal" includes absolute equality and approximate equality, where an acceptable deviation range for approximate equality can be, for example, a difference between the two equal items being less than or equal to 5% of either one. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] The counterweight of a crane mainly serves a balancing function. Its core function is to balance the overturning moment generated by the boom and the load, preventing the crane from tipping forward during operation, thereby ensuring the stability of the whole machine and operational safety.

[0023] In related technologies, the counterweight 32 and counterweight pallet 31 of a crane are generally made of welded steel plate shells filled with a mixture of ore, iron sand and concrete of different densities. This causes the center of gravity of the counterweight 32 to deviate from the design. During the lifting and installation of the counterweight 32, the lifting frame rotates due to the change in the center of gravity of the counterweight, making it impossible to lift the counterweight 32 vertically, which causes installation difficulties.

[0024] Therefore, this application provides a crane counterweight lifting cylinder lifting frame and a crane to solve or improve the problem of difficult installation of counterweight block 32.

[0025] The following is combined Figures 1 to 7 This describes an embodiment of the present application.

[0026] According to embodiments of this application, in one aspect, a crane counterweight lifting cylinder lifting frame is provided, such as... Figures 1 to 4 As shown, it includes a lifting assembly 1, which includes a lifting component 11, a lifting beam 13, a chain 12, and a limiting assembly 14. The specific scheme is as follows.

[0027] like Figure 1 As shown, the lifting component 11 is a component with lifting and lowering functions, such as a hydraulic cylinder. The lifting component 11 has a lifting head 111 and a fixed seat 112. The fixed seat 112 is suitable for installation on the main turntable 2 of the crane. Specifically, the lifting head 111 is the end of the piston rod of the hydraulic cylinder away from the cylinder body, and the fixed seat 112 can be the cylinder body of the hydraulic cylinder.

[0028] In the hydraulic cylinder, the cylinder body is made of high-strength alloy steel (such as 27SiMn), and the inner wall is precision ground and hard chrome plated, making it wear-resistant and pressure-resistant. The piston rod is made of 42CrMo alloy steel, and after quenching and tempering, the surface is chrome plated, which has high tensile strength and corrosion resistance. The seals are made of polyurethane or nitrile rubber, which is oil-resistant and anti-aging.

[0029] like Figure 2 , Figure 3 and Figure 4 As shown, the lifting beam 13 is a beam with high bending strength, formed by welding or bolting metal profiles. The middle part of the lifting beam 13 is hinged to the lifting head 111, and the two ends of the lifting beam 13 are respectively connected to the counterweight assembly 3 through the chain 12.

[0030] Specifically, a first rotating shaft 134 is fixedly inserted in the middle of the lifting beam 13. The first rotating shaft 134 is rotatably connected to the lifting head 111 of the lifting component 11 through a bearing bush. Alternatively, the lifting head 111 of the lifting component 11 is fixedly inserted with the first rotating shaft 134, and the first rotating shaft 134 is rotatably connected to the middle of the lifting beam 13 through a bearing bush.

[0031] like Figure 4 As shown, the limiting component 14 is a rigid limiting component, such as a limiting pin or a limiting steel plate. The limiting component 14 is connected to the lifting beam 13, and the limiting component 14 makes limiting contact with the lifting head 111 in the direction of rotation of the lifting beam 13 relative to the lifting head 111.

[0032] Specifically, the limiting component 14 can be inserted into the lifting beam 13, and its end is limited relative to the lifting beam 13 by a spring pin or the like. The limiting component 14 can make limiting contact with the outer peripheral surface of the lifting head 111, or the lifting head 111 can be provided with a limiting hole for insertion and limiting with the limiting component 14. Of course, other methods can also be used to limit the rotation of the lifting beam 13 relative to the lifting head 111.

[0033] In specific usage, such as Figures 1 to 4 As shown, a lifting assembly 1 is installed on each side of the width of the main turntable 2 of the crane. Two chains 12 at both ends of the lifting frame of one lifting assembly 1 connect the counterweight 32 to the part located on one side of the width of the main turntable 2. Two chains 12 at both ends of the lifting frame of the other lifting assembly 1 connect the counterweight 32 to the part located on the other side of the width of the main turntable 2. Then, the lifting heads 111 of the two lifting assemblies 1 are controlled by the controller to lift, driving the counterweight 32 to move closer to the bottom of the main turntable 2 and connect with the bottom of the main turntable 2.

[0034] During the lifting process of the counterweight 32, due to unstable production process or uneven mixing of filler, the center of gravity of the counterweight 32 may not be centered. The limiting component 14 can restrict the rotation of the lifting beam 13, thereby ensuring that the counterweight 32 is lifted vertically. This facilitates the alignment of the counterweight 32 with the connection structure of the main turntable 2, reduces installation difficulty, and improves installation efficiency.

[0035] In this embodiment, such as Figures 1 to 4 As shown, a lifting beam 13 is rotatably connected to the lifting head 111 of the lifting component 11. The two ends of the lifting beam 13 are connected to the counterweight 32 via chains 12. The limiting component 14 makes limiting contact with the lifting head 111 around the rotation direction of the lifting beam 13 relative to the lifting head 111. During the lifting of the counterweight 32, the limiting component 14 can restrict the rotation of the lifting beam 13 relative to the lifting head 111, thereby preventing the counterweight 32 from swaying around the rotation axis of the lifting beam 13 and the lifting head 111, ensuring that the counterweight 32 is lifted vertically, facilitating the alignment of the counterweight 32 with the connection structure of the main turntable 2, reducing installation difficulty, and improving installation efficiency.

[0036] In one embodiment, such as Figure 2 and Figure 4 As shown, the limiting component 14 includes multiple limiting parts 141. Along the rotation direction of the lifting beam 13 relative to the lifting head 111, at least one limiting part 141 is provided on both sides of the lifting head 111. Specifically, the limiting part 141 is a limiting pin, which is inserted into the lifting beam 13 for easy disassembly, thereby facilitating the swing of the chain 12 and the disassembly and assembly of the chain 12 and the counterweight component 3.

[0037] Specifically, two limiting pins (or limiting plates, etc.) are inserted on the lifting beam 13, located on the left and right sides of the lifting head 111 respectively. During the process of lifting the counterweight 32 by the lifting beam 13, when the center of gravity of the counterweight 32 is not centered and it sways, the limiting pins located on both sides of the lifting head 111 can limit the swing of the lifting beam 13 to prevent the counterweight 32 from swaying.

[0038] In this embodiment, such as Figure 2 and Figure 4 As shown, the lifting beam 13 is rotated relative to the lifting head 111, and at least one limiting component 141 is provided on both sides of the lifting head 111. The limiting components 141 on both sides of the lifting head 111 form a clamping or double-block structure, which can effectively limit the displacement of the lifting beam 13 in two rotational directions and ensure that it can be reliably constrained regardless of the direction of the center of gravity deviation.

[0039] In one embodiment, such as Figure 4 As shown, the lifting beam 13 includes a first end plate 131, a second end plate 132, and a connecting plate 133, with the specific design as follows.

[0040] like Figure 4 As shown, the first end plate 131 is a steel plate or a high-strength aluminum alloy plate, etc. The first end plate 131 has a first slot 1311. The number of first slots 1311 is equal to the number of limiting components 141, that is, the first slots 1311 and the limiting components 141 are set in a one-to-one correspondence.

[0041] like Figure 4 As shown, the second end plate 132 is made of steel plate or high-strength aluminum alloy plate, etc. The second end plate 132 is spaced apart from the first end plate 131. The lifting head 111 is located between the first end plate 131 and the second end plate 132. The lifting head 111 is rotatably connected to the first end plate 131 and the second end plate 132 through the first rotating shaft 134. The second end plate 132 has a second slot. The second slot and the first slot 1311 are coaxially arranged along the axis of the rotating shaft. The number of second slots is equal to the number of first slots 1311, that is, the first slots 1311 and the second slots are arranged one-to-one along the axis of the first rotating shaft 134.

[0042] like Figure 4 As shown, the connecting plate 133 is a metal plate or a high-strength aluminum alloy plate, etc. The connecting plate 133 is located between the first end plate 131 and the second end plate 132, and the connecting plate 133 is connected to the first end plate 131 and the second end plate 132; that is, the first end plate 131 and the second end plate 132 are connected into an integral structure through the connecting plate 133.

[0043] The limiting component 141 is inserted into the second slot through the first slot 1311, and the portion of the limiting component 141 located between the first slot 1311 and the second slot makes limiting contact with the lifting head 111.

[0044] Specifically, the second slot can be either a through hole or a blind hole (the second slot on the second end plate 132 in the figure is a blind hole).

[0045] In this embodiment, such as Figure 2 and Figure 4As shown, the lifting beam 13 is constructed from a first end plate 131, a second end plate 132, and a connecting plate 133. It has a large bending section modulus and can effectively resist the huge bending moment caused by eccentric load. The lifting head 111 is located between the first end plate 131 and the second end plate 132 and is connected by the first rotating shaft 134. It is symmetrically stressed and the force transmission path is clear and direct, avoiding the additional torque that may be generated by the connection of a single side plate. The entire lifting beam 13 is a very rigid whole with small deformation, which ensures the relative position accuracy of the suspension points of the chains 12 at both ends.

[0046] At the same time, the limiting component 141 passes through both end plates. The limiting component 141 provides constraint on the lifting head 111 from both sides, which avoids the possibility of local deformation or deflection of the end plate when a single side plate is subjected to force, making the limiting effect more stable and accurate. Moreover, under the support of the two support points of the first end plate 131 and the second end plate 132, the limiting component 141 is similar to a simply supported beam, and its bending resistance is much stronger than that of a cantilever structure, and it can withstand greater impact limiting force.

[0047] In one embodiment, such as Figure 6 and Figure 7 As shown, the lifting beam 13 also includes a first connecting cylinder 135 and a second connecting cylinder 136. The first connecting cylinder 135 and the second connecting cylinder 136 are located between the first end plate 131 and the second end plate 132. The first connecting cylinder 135 and the second connecting cylinder 136 are located at both ends of the lifting beam 13. The first connecting cylinder 135 and the second connecting cylinder 136 are respectively connected to the first end plate 131 and the second end plate 132 through a second rotating shaft 137. A chain 12 is hung on both the first connecting cylinder 135 and the second connecting cylinder 136.

[0048] Specifically, the first connecting cylinder 135 and the second connecting cylinder 136 are respectively fitted onto the two second rotating shafts 137.

[0049] In this embodiment, such as Figure 7 As shown, a first connecting cylinder 135 and a second connecting cylinder 136 are respectively set at both ends of the lifting beam 13 to connect with the chain 12. During the lifting of the counterweight 32, the huge load is transmitted to the first end plate 131 and the second end plate 132 in the form of surface contact or line contact, and the load distribution is more uniform. This avoids stress concentration caused by opening a single large hole in the end plate. In addition, the first connecting cylinder 135 and the second connecting cylinder 136, as structural components, also participate in the bending and shear resistance of the ends of the lifting beam 13, enhancing the local stiffness and strength of both ends of the lifting beam 13.

[0050] In one embodiment, such as Figure 4 and Figure 5As shown, a thickened portion 1312 is provided in the middle of the first end plate 131, and the first slot 1311 passes through the thickened portion 1312. Specifically, the thickened portion 1312 and the first end plate 131 can be integrally formed, or the thickened portion 1312 can be a plate body that is welded to one side of the first end plate 131.

[0051] In this embodiment, such as Figure 4 and Figure 5 As shown, the thickened portion 1312 directly increases the cross-sectional area of ​​the metal material at that location, reduces the compressive stress (contact stress) of the limiting component 141 on the wall of the first slot 1311, and greatly improves the ability of that location to resist the bending moment and shear force transmitted by the limiting component 141, preventing the first end plate 131 from undergoing plastic deformation, cracking or fatigue damage around the first slot 1311.

[0052] In one embodiment, such as Figure 7 As shown, the chain 12 includes a main chain 121 and a connecting buckle 122. The connecting buckle 122 includes a first half buckle 1221 and a second half buckle 1222. The two ends of the first half buckle 1221 are coaxially rotatably connected to the two ends of the second half buckle 1222. The first half buckle 1221 is fastened to the main chain 121, and the second half buckle 1222 is connected to the end of the lifting beam 13.

[0053] Specifically, the first half buckle 1221 is attached to the first connecting cylinder 135 or the second connecting cylinder 136; the first half buckle 1221 and the second half buckle 1222 are usually symmetrical or nearly symmetrical U-shaped or C-shaped forged components.

[0054] In this embodiment, such as Figure 7 As shown, the first half-hook 1221, the connecting pin, the second half-hook 1222, and the connection point of the lifting beam 13 constitute a composite hinge system. The rotational connection between the first half-hook 1221 and the second half-hook 1222 provides an additional degree of rotational freedom. During the lifting process of the counterweight 32, the counterweight 32 may have a tendency to twist around the vertical axis due to the tilt of the center of gravity. This torsional force will be transmitted upward through the chain 12. Traditional rigid connections will cause the chain 12 to bear torque and may kink. This structure can absorb and release this part of the torsional load through the hinge of the first half-hook 1221 and the second half-hook 1222, ensuring that the main chain 121 mainly bears pure tension, protecting the chain 12 and extending its service life.

[0055] According to embodiments of this application, another aspect, a crane, such as... Figure 1As shown, the system includes a main turntable 2, a counterweight assembly 3, and a crane counterweight lifting cylinder lifting frame in any of the above embodiments. There are two lifting assemblies 1, which are respectively arranged on both sides of the main turntable 2. The fixed seat 112 is connected to the side of the main turntable 2. The counterweight assembly 3 is connected to the chain 12.

[0056] In this embodiment, since the crane includes a crane counterweight lifting cylinder lifting frame, which has the same technical effect as the crane counterweight lifting cylinder lifting frame, it will not be described in detail here.

[0057] In one embodiment, such as Figure 1 As shown, the counterweight assembly 3 includes a counterweight tray 31 and multiple counterweight blocks 32. A first connector 311 is provided in the middle of the counterweight block 32, and a second connector 21 is provided at the bottom of the main turntable 2. The first connector 311 and the second connector 21 are detachably connected. Multiple counterweight blocks 32 are stacked on both sides of the counterweight tray 31.

[0058] Specifically, such as Figure 1 As shown, the first connector 311 has multiple lugs, and the second connector 21 has multiple hanging lugs. The lugs and hanging lugs are connected by connectors (such as pins).

[0059] In this embodiment, multiple standard counterweights 32 are used. The number of counterweights 32 can be flexibly increased or decreased according to the total amount of counterweight required for the lifting task, so as to achieve fine adjustment of the counterweight and enable the crane to achieve the best stability and lifting performance under different working conditions.

[0060] Furthermore, incorporating the counterweight tray 31 as part of the counterweight simplifies the structure and improves the stability of the counterweight.

[0061] Meanwhile, the counterweights 32 are stacked on both sides of the counterweight tray 31, so that the overall center of gravity of the tray and the counterweight assembly 3 is located as close as possible to the center area of ​​the line connecting the two lifting points of the lifting frame. This is conducive to torque balance during lifting and reduces the torque load on the lifting assembly 1 itself.

[0062] In one embodiment, the counterweight 32 includes a first outer shell and a first filler, the first filler being located inside the first outer shell and including at least two of ore, iron sand and concrete; the counterweight tray 31 includes a second outer shell and a second filler, the second filler being located inside the second outer shell and including at least two of ore, iron sand and concrete.

[0063] Specifically, both the first and second outer shells are metal shells; the first and second fillers can be a combination of ore and iron sand, a combination of ore and concrete, a combination of iron sand and concrete, or even a combination of ore, iron sand and concrete.

[0064] In this embodiment, by changing the proportions of ore, iron sand, and concrete, the density, total weight, fluidity (for casting process), and cost of the counterweight block 32 can be adjusted within a certain range to meet the needs of different crane models and different counterweight levels.

[0065] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A lifting frame for a crane's counterweight lifting cylinder, characterized in that, include: Lifting assembly (1), the lifting assembly (1) comprising: The lifting component (11) has a lifting head (111) and a fixed seat (112), the fixed seat (112) being adapted to be installed on the main turntable (2) of the crane; Chain (12); The lifting beam (13) is hinged to the lifting head (111) at its middle part, and the two ends of the lifting beam (13) are respectively adapted to be connected to the counterweight assembly (3) through the chain (12); A limiting component (14) is connected to the lifting beam (13). The limiting component (14) makes a limiting contact with the lifting head (111) in the direction of rotation of the lifting beam (13) relative to the lifting head (111).

2. The crane counterweight lifting cylinder lifting frame according to claim 1, characterized in that, The limiting assembly (14) includes multiple limiting components (141), and at least one of the limiting components (141) is provided on both sides of the lifting head (111) along the rotation direction of the lifting beam (13) relative to the lifting head (111).

3. The crane counterweight lifting cylinder lifting frame according to claim 2, characterized in that, The limiting component (141) is a limiting pin.

4. The crane counterweight lifting cylinder lifting frame according to any one of claims 2 to 3, characterized in that, The lifting beam (13) includes: The first end plate (131) has a first slot (1311); The second end plate (132) is spaced apart from the first end plate (131). The lifting head (111) is located between the first end plate (131) and the second end plate (132). The lifting head (111) is rotatably connected to the first end plate (131) and the second end plate (132) through the first rotating shaft (134). The second end plate (132) has a second slot. The second slot and the first slot (1311) are coaxially arranged along the axial direction of the first rotating shaft (134). A connecting plate (133) is located between the first end plate (131) and the second end plate (132), and the connecting plate (133) is connected to the first end plate (131) and the second end plate (132); The limiting component (141) is inserted into the second slot through the first slot (1311), and the portion of the limiting component (141) located between the first slot (1311) and the second slot is in limiting contact with the lifting head (111).

5. The crane counterweight lifting cylinder lifting frame according to claim 4, characterized in that, The lifting beam (13) further includes a first connecting cylinder (135) and a second connecting cylinder (136). The first connecting cylinder (135) and the second connecting cylinder (136) are located between the first end plate (131) and the second end plate (132). The first connecting cylinder (135) and the second connecting cylinder (136) are located at both ends of the lifting beam (13). The first connecting cylinder (135) and the second connecting cylinder (136) are respectively connected to the first end plate (131) and the second end plate (132) through a second rotating shaft (137). The chain (12) is hung on both the first connecting cylinder (135) and the second connecting cylinder (136).

6. The crane counterweight lifting cylinder lifting frame according to claim 4, characterized in that, The first end plate (131) has a thickened part (1312) in the middle, and the first slot (1311) passes through the thickened part (1312).

7. The crane counterweight lifting cylinder lifting frame according to any one of claims 1 to 3, characterized in that, The chain (12) includes a main chain (121) and a connecting buckle (122). The connecting buckle (122) includes a first half buckle (1221) and a second half buckle (1222). The two ends of the first half buckle (1221) are coaxially rotatably connected to the two ends of the second half buckle (1222). The first half buckle (1221) is fastened to the main chain (121), and the second half buckle (1222) is connected to the end of the lifting beam (13).

8. A crane, characterized in that, include: Main turntable (2); The crane counterweight lifting cylinder lifting frame as described in any one of claims 1 to 7, wherein there are two lifting components (1), the two lifting components (1) are respectively arranged on both sides of the main turntable (2), and the fixed seat (112) is connected to the side of the main turntable (2); The counterweight assembly (3) is connected to the chain (12).

9. The crane according to claim 8, characterized in that, The counterweight assembly (3) includes a counterweight tray (31) and multiple counterweight blocks (32). A first connector (311) is provided in the middle of the counterweight tray (31), and a second connector (21) is provided at the bottom of the main turntable (2). The first connector (311) and the second connector (21) are detachably connected. Multiple counterweight blocks (32) are stacked on both sides of the counterweight tray (31).

10. The crane according to claim 9, characterized in that, The counterweight (32) includes a first outer shell and a first filler, the first filler being located inside the first outer shell, and the first filler including at least two of ore, iron sand and concrete; And / or, the counterweight tray (31) includes a second housing and a second filler, the second filler being located within the second housing and comprising at least two of ore, iron sand and concrete.

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