Counterweight for a crane

Abstract

The utility model belongs to counterweight block technical field especially, it is counterweight block for crane, including component body, the component body includes bottom plate, front side plate, back side plate, left side plate, right side plate, middle top plate, left side top plate, right side top plate, bottom plate, front side plate, back side plate, left side plate, right side plate, middle top plate, left side top plate, right side top plate enclose into a closed box -shaped structure, fill high density filling material in the inside to enhance counterweight, left side top plate and right side top plate symmetrically set up in middle top plate both sides, form the ladder type top profile, still be provided with the first vertical plate, second vertical plate of vertical setting on the bottom plate, the first vertical plate, second vertical plate symmetrically set up, leave the interval between both, this interval is used to install connecting rod, the first vertical plate, second vertical plate pass through the side plate and form the first extension lug plate by one end of back side plate, the counterweight block stability higher, higher strength that the application provides, and reduced cost, improved production convenience.

Description

Technical Field

[0001] This utility model relates to the field of counterweight technology, and in particular to a counterweight for cranes. Background Technology

[0002] A counterweight is a heavy object used to balance moving parts of a machine. It increases the weight of the machine or device to maintain its balance. Its core function is to adjust the mass distribution to achieve static or dynamic balance. Especially in heavy machinery, counterweights are needed to maintain equipment stability and balance torque.

[0003] During the installation of counterweight structures in heavy machinery, hoisting is often required. However, existing counterweight structures suffer from problems such as insufficient compaction, inconvenient need for multiple positioning during production, and interference between the uprights, reinforcing plates, and welds. Utility Model Content

[0004] This utility model provides a counterweight for a crane, aiming to solve at least one of the above-mentioned technical problems.

[0005] This utility model provides the following technical solution: A counterweight for a crane includes a component body comprising a base plate, a front side plate, a rear side plate, a left side plate, a right side plate, a central top plate, a left top plate, and a right top plate. The base plate, front side plate, rear side plate, left side plate, right side plate, central top plate, left top plate, and right top plate form a closed box-shaped structure, which is filled with high-density filler to enhance the counterweight. The left top plate and right top plate are symmetrically arranged on both sides of the central top plate, forming a stepped top profile. The base plate also has a vertically arranged first upright plate and a second upright plate, which are symmetrically arranged with a gap between them for installing a connecting rod. One end of the first upright plate and the second upright plate extends out of the side plate to form a first extension ear plate, which has a mounting hole. The connecting rod passes through both ends and connects to the corresponding mounting hole. The upper part of the first upright plate and the second upright plate has a second extension ear plate that penetrates the central top plate and has a through hole.

[0006] Preferably, notches are made at both ends of the bottom of the first and second upright plates near the edge of the base plate to avoid weld seams.

[0007] Preferably, a passageway is provided at the middle of the bottom of the first upright plate and the second upright plate.

[0008] Preferably, the base plate is provided with a plurality of first reinforcing ribs arranged along the length direction.

[0009] Preferably, the left side panel and the front side panel are connected to form an R-shaped rounded corner transition structure, and the right side panel and the front side panel are also connected to form an R-shaped rounded corner transition structure.

[0010] Preferably, the lower part of the left top plate and the right top plate is provided with multiple frame-shaped reinforcing ribs, the shape of which is a frame that matches the outline of the lower part of the left top plate and the right top plate.

[0011] Preferably, multiple counterweight lifting lugs are installed between the first upright plate and the left-side frame-shaped reinforcing rib, and multiple counterweight lifting lugs are installed between the second upright plate and the right-side frame-shaped reinforcing rib.

[0012] Preferably, the frame-type reinforcing rib is welded together from a right-angled rib plate and an arc-shaped rib plate, with the two ends of the right-angled rib plate connected to the ends of the arc-shaped rib plate to form a closed frame structure.

[0013] Preferably, the top of the counterweight lifting lug extends through the middle top plate to form the root of the lifting lug, and the root of the lifting lug is provided with a lifting hole.

[0014] Preferably, a second reinforcing rib is installed on the first reinforcing rib in the front-rear direction. The second reinforcing rib is perpendicular to the first reinforcing rib, and both ends of the second reinforcing rib are fixedly connected to the counterweight lugs on the same side.

[0015] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention.

[0016] In this invention, the left and right top plates are symmetrically arranged on both sides of the middle top plate, forming a stepped top profile, which helps to lower the center of gravity of the counterweight and improve stability, while providing reliable positioning and support for the installation of the upper components.

[0017] Notches are made at both ends of the first and second upright plates near the edge of the base plate to avoid weld seams. The notches effectively prevent welding stress concentration and improve the fatigue strength and overall reliability of the structure.

[0018] The frame-type reinforcing ribs provide better structural support for the stepped top profile on the left and right sides, significantly improving the compressive and deformation resistance of the top plate. At the same time, they form a stable force transmission path with the side plates, enhancing the overall structural load-bearing stability.

[0019] A frame-type reinforcing rib is welded together from a right-angled rib plate and an arc-shaped rib plate, which can reduce material usage and improve material utilization.

[0020] The base plate is also provided with multiple laser marks to guide the installation of the side plates and upright plates on the base plate. For example, in this embodiment, two laser marks are provided at the installation positions of the first upright plate and the second upright plate to guide the installation of the first upright plate and the second upright plate.

[0021] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a top view of an embodiment of the present invention. Figure 2 for Figure 1 The right-side view; Figure 3 This is a three-dimensional structural diagram of an embodiment of the present invention after removing the central top plate and the right side top plate; Figure 4 for Figure 3 A structural diagram showing the structure after removing the front and right side panels.

[0023] Figure label: 1. Right side top plate; 2. Pad block; 3. Middle top plate; 4. Left side top plate; 5. Root of lifting lug; 6. Notch; 7. Second extension lug plate; 8. First extension lug plate; 9. Connecting rod; 10. Lifting hole; 11. Rear side plate; 12. Right side plate; 13. Left side plate; 14. Front side plate; 15. Right-angled stiffener plate; 16. Arc-shaped stiffener plate; 17. First reinforcing rib; 18. Bottom plate; 19. Counterweight lifting lug; 20. Second reinforcing rib; 21. Laser marking; 22. First reinforcing plate; 23. Third reinforcing rib; 24. Second reinforcing plate; 25. Through hole; 26. First upright plate; 27. Second upright plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0026] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] To better understand the purpose, function, and specific design of this utility model, the following detailed description is provided in conjunction with the accompanying drawings.

[0030] This application provides a counterweight for a crane, comprising a component body. The component body includes a base plate 18, a front side plate 14, a rear side plate 11, a left side plate 13, a right side plate 12, a central top plate 3, a left side top plate 4, and a right side top plate 1. The base plate 18, front side plate 14, rear side plate 11, left side plate 13, right side plate 12, central top plate 3, left side top plate 4, and right side top plate 1 form a closed box-shaped structure, which is filled with high-density filler to enhance the counterweight. The left side top plate 4 and right side top plate 1 are symmetrically arranged on both sides of the central top plate 3, forming a stepped top profile. Vertical supports are also provided on the base plate 18. The first upright plate 26 and the second upright plate 27 are symmetrically arranged with a gap between them for installing the connecting rod 9. One end of the first upright plate 26 and the second upright plate 27 extends out of the side plate 11 to form a first extended ear plate 8. The first extended ear plate 8 has a mounting hole, and the connecting rod 9 passes through both ends and connects to the corresponding mounting hole. The upper part of the first upright plate 26 and the second upright plate 27 is provided with a second extended ear plate 7 that penetrates the middle top plate 3. The second extended ear plate 7 has a through hole 25 for hinged connection with the crane boom structure to achieve stable suspension of the counterweight.

[0031] The base plate 18, front side plate 14, rear side plate 11, left side plate 13, right side plate 12, central top plate 3, left side top plate 4, and right side top plate 1 form a closed box-shaped structure, which can effectively improve the overall structural strength while ensuring that the counterweight is evenly stressed during lifting. The left side top plate 4 and right side top plate 1 are symmetrically arranged on both sides of the central top plate 3, forming a stepped top profile, which helps to lower the center of gravity of the counterweight, improve stability, and provide reliable positioning and support for the installation of the upper components.

[0032] For example, the filler can be cast iron particles, steel grit, or high-density concrete.

[0033] In some embodiments, notches 6 are made at both ends of the bottom of the first upright plate 26 and the second upright plate 27 near the edge of the base plate 18 to avoid weld seams. The notches 6 effectively avoid welding stress concentration and improve the fatigue strength and overall reliability of the structure.

[0034] For example, please refer to Figure 4 Notch 6 is designed with a chamfered structure to avoid the weld seam.

[0035] In some embodiments, the first upright plate 26 and the second upright plate 27 are provided with a passage at the middle of their bottom.

[0036] When the above-mentioned opening is used to fill high-density filler, the opening facilitates the injection of filler into the box, ensuring dense and uniform filling, while reducing internal voids and improving the overall density consistency of the counterweight.

[0037] For example, please refer to Figure 4 In this embodiment, the shape of the opening is set to a rectangle.

[0038] In some embodiments, the base plate 18 is provided with a plurality of first reinforcing ribs 17 arranged along the length direction.

[0039] The aforementioned first reinforcing rib 17 is evenly distributed along the length of the base plate 18 to improve the bending stiffness and local load-bearing capacity of the base plate 18 and prevent plastic deformation under heavy load conditions.

[0040] For example, such as Figure 4 As shown, four first reinforcing ribs 17 are provided between the first upright plate 26 and the second upright plate 27. Two of them are located at the bottom and connected to the bottom plate 18, with their ends fixedly connected to the first upright plate 26 and the second upright plate 27 respectively. The other two are located at the top. The two ends of the upper first reinforcing ribs 17 are fixedly connected to the upper parts of the first upright plate 26 and the second upright plate 27 respectively. The upper first reinforcing ribs 17 correspond one-to-one with the lower first reinforcing ribs 17, and a second reinforcing plate 24 is fixed between the corresponding upper and lower first reinforcing ribs 17.

[0041] In addition, please refer to Figure 4 To further improve the overall strength, a third reinforcing rib 23 is welded to the top of the first reinforcing rib 17 at the bottom. The third reinforcing rib 23 extends along the width of the counterweight block and is fixedly connected at both ends to the inner walls of the front side plate 14 and the rear side plate 11, respectively, to form a transverse support structure, which effectively enhances the torsional resistance of the box.

[0042] Furthermore, the base plate 18 is also provided with a plurality of laser marks 21 for guiding the installation of the side plates and upright plates on the base plate 18. For example, in this embodiment, two laser marks 21 are provided at the installation positions of the first upright plate 26 and the second upright plate 27 to guide the installation of the first upright plate 26 and the second upright plate 27.

[0043] In some embodiments, an R-shaped rounded corner transition structure is formed at the connection between the left side plate 13 and the front side plate 14, and an R-shaped rounded corner transition structure is also provided at the connection between the right side plate 12 and the front side plate 14.

[0044] The R-shaped rounded corner transition structure can effectively reduce the stress concentration factor, improve the fatigue durability of the connection area, and facilitate welding operations, ensuring weld quality.

[0045] In some embodiments, the lower part of the left top plate 4 and the right top plate 1 is provided with a plurality of frame-shaped reinforcing ribs, the shape of which is a frame body that matches the lower contour of the left top plate 4 and the right top plate 1.

[0046] The frame-type reinforcing ribs provide better structural support for the stepped top profile on the left and right sides, significantly improving the compressive and deformation resistance of the top plate. At the same time, they form a stable force transmission path with the side plates, enhancing the overall structural load-bearing stability.

[0047] In some embodiments, such as Figures 3-4 As shown, multiple counterweight lifting lugs 19 are installed between the first upright plate 26 and the frame-shaped reinforcing rib on the left, and multiple counterweight lifting lugs 19 are installed between the second upright plate 27 and the frame-shaped reinforcing rib on the right.

[0048] For example, in this embodiment, two counterweight lifting lugs 19 are fixed on the left side near the front side plate 14, with a gap between the two counterweight lifting lugs 19, and one counterweight lifting lug 19 is fixed on the left side near the rear side plate 11; similarly, one counterweight lifting lug 19 is fixed on the right side near the front side plate 14, and two counterweight lifting lugs 19 are fixed on the right side near the rear side plate 11, with a gap between the two counterweight lifting lugs 19; this makes the force distribution of the counterweight lifting lugs 19 more balanced, thereby improving the stability of the overall structure and the safety of lifting; in addition, in order to improve strength, a first reinforcing plate 22 is fixed to the top of two adjacent counterweight lifting lugs 19 on the same side, please refer to Figure 4 The tops of the two counterweight lugs 19 on the left-side front side plate 14 are connected by a first reinforcing plate 22, and the two counterweight lugs 19 on the right-side rear side plate 11 are also fixedly connected by another first reinforcing plate 22, which further enhances the connection strength and overall rigidity of the counterweight lugs 19.

[0049] In some embodiments, such as Figures 3-4 As shown, the frame-type reinforcing rib is welded together from a right-angled rib plate 15 and an arc-shaped rib plate 16. The two ends of the right-angled rib plate 15 are connected to the ends of the arc-shaped rib to form a closed frame structure.

[0050] For example, in this embodiment, a total of four frame-shaped reinforcing ribs are provided, evenly distributed in the lower areas of the left top plate 4 and the right top plate 1, as shown in the reference. Figure 4 Two frame-shaped reinforcing ribs are provided at the lower part of the left top plate 4, respectively located in the middle between the bottom plate 18 and the left top plate 4 and near the left top plate 4. Similarly, the same number of frame-shaped reinforcing ribs are symmetrically provided on the right side to ensure the symmetry of the left and right sides of the structure and improve the overall load-bearing capacity and deformation resistance. Each frame-shaped reinforcing rib is welded from a right-angled stiffener plate 15 and an arc stiffener plate 16, which can reduce material usage and improve material utilization.

[0051] In some embodiments, the top of the counterweight lug 19 extends through the middle top plate 3 to form a lug root 5, and the lug root 5 is provided with a lifting hole 10.

[0052] In addition, please refer to Figure 1Four pads 2 are provided at the top of the central top plate 3. The pads 2 are fixedly connected to the central top plate 3. The pads 2 are all located on the side of the root of the lifting lug 5 near the middle of the central top plate 3.

[0053] In some embodiments, a second reinforcing rib 20 is installed on the first reinforcing rib 17 in the front-rear direction. The second reinforcing rib 20 is arranged perpendicularly to the first reinforcing rib 17, and both ends of the second reinforcing rib 20 are fixedly connected to the counterweight lug 19 on the same side.

[0054] The addition of the second reinforcing rib 20 further enhances the bending and torsional resistance of the counterweight lifting lug 19 during lifting, making the load transfer more even.

[0055] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A counterweight for a crane, characterized in that, The component body includes a base plate (18), a front side plate (14), a rear side plate (11), a left side plate (13), a right side plate (12), a central top plate (3), a left side top plate (4), and a right side top plate (1). The base plate (18), front side plate (14), rear side plate (11), left side plate (13), right side plate (12), central top plate (3), left side top plate (4), and right side top plate (1) form a closed box-shaped structure, which is filled with high-density filler to enhance the counterweight. The left side top plate (4) and right side top plate (1) are symmetrically arranged on both sides of the central top plate (3) to form a stepped top profile. 8) A first upright plate (26) and a second upright plate (27) are also provided vertically. The first upright plate (26) and the second upright plate (27) are symmetrically arranged and there is a gap between them. This gap is used to install the connecting rod (9). One end of the first upright plate (26) and the second upright plate (27) protrudes from the side plate (11) to form a first extended ear plate (8). The first extended ear plate (8) has a mounting hole. The connecting rod (9) passes through both ends and connects to the corresponding mounting hole. The upper part of the first upright plate (26) and the second upright plate (27) is provided with a second extended ear plate (7) that penetrates the middle top plate (3). The second extended ear plate (7) has a through hole (25).

2. The counterweight for a crane according to claim 1, characterized in that, The bottom ends of the first vertical plate (26) and the second vertical plate (27) are notched (6) near the edge of the base plate (18) to avoid the weld seam.

3. A counterweight for a crane according to claim 2, characterized in that, The first upright plate (26) and the second upright plate (27) have passage openings at the bottom middle.

4. A counterweight for a crane according to claim 1, characterized in that, The base plate (18) is provided with multiple first reinforcing ribs (17) arranged along the length direction.

5. A counterweight for a crane according to claim 1, characterized in that, The left side panel (13) and the front side panel (14) are connected by an R-shaped rounded corner transition structure, and the right side panel (12) and the front side panel (14) are also connected by an R-shaped rounded corner transition structure.

6. A counterweight for a crane according to claim 1, characterized in that, Multiple frame-shaped reinforcing ribs are provided at the lower part of the left top plate (4) and the right top plate (1). The shape of the frame-shaped reinforcing ribs is a frame that matches the lower outline of the left top plate (4) and the right top plate (1).

7. A counterweight for a crane according to claim 3, characterized in that, Multiple counterweight lifting lugs (19) are installed between the first upright plate (26) and the left frame-type reinforcing rib, and multiple counterweight lifting lugs (19) are installed between the second upright plate (27) and the right frame-type reinforcing rib.

8. A counterweight for a crane according to claim 6, characterized in that, The frame-type reinforcing rib is welded together from a right-angled rib plate (15) and an arc-shaped rib plate (16). The two ends of the right-angled rib plate (15) are connected to the ends of the arc-shaped rib to form a closed frame structure.

9. A counterweight for a crane according to claim 7, characterized in that, The top of the counterweight lifting lug (19) extends through the middle top plate (3) to form the root of the lifting lug (5), and the root of the lifting lug (5) is provided with a lifting hole (10).

10. A counterweight for a crane according to claim 4, characterized in that, A second reinforcing rib (20) is installed on the first reinforcing rib (17) in the front and rear directions. The second reinforcing rib (20) is set perpendicular to the first reinforcing rib (17). Both ends of the second reinforcing rib (20) are fixedly connected to the counterweight lug (19) on the same side.

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