Counterweight device for crane

Abstract

The utility model discloses a counterweight device for a crane, which comprises a base and a plurality of counterweight bodies, the top end of the base is fixedly connected with two vertical plates, the top ends of the two vertical plates are fixedly connected with a top plate, the opposite ends of the two vertical plates are provided with a plurality of slots, and the counterweight bodies are positioned between the two vertical plates. Inserting strips are fixedly connected to the two ends of each balancing weight body, clamping grooves are formed in the middles of the side ends of the inserting strips, two first grooves are formed in the positions, corresponding to the inserting grooves, of the side ends of the vertical plates, mounting grooves communicated with the inserting grooves are formed in the side ends of the two first grooves, and the first grooves are larger than the mounting grooves in size; and fixing mechanisms are mounted in the first grooves and the mounting grooves, so that the corresponding balancing weight bodies can be independently disassembled and replaced, the use practicability of the balancing weight is improved, the situation that the balancing weight bodies are fixed through structures such as hydraulic cylinders is avoided, and the use cost of the balancing weight is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of crane counterweights, and more specifically, to a counterweight device for a crane. Background Art

[0002] A crane is a machine that uses a hook or other lifting device to hang heavy objects and perform cyclic operations such as lifting and moving in space. There are many types of cranes. "Crane", "tower crane", "overhead crane", "traveling crane" and other common names refer to one or several types of cranes. The counterweight block is the main structural component of the crane. The weight of the counterweight block has a great influence on the stability of the crane.

[0003] After searching, the utility model patent with Chinese application number CN202321822686.3 discloses a counterweight device for crane, including a counterweight base supporting mechanism, a counterweight mechanism is arranged on the top of the counterweight base supporting mechanism, and a counterweight mounting mechanism is arranged on the top of the counterweight mechanism. By arranging the counterweight base supporting mechanism, the counterweight mechanism, the counterweight mounting mechanism and the counterweight reinforcement mechanism, the counterweight base supporting mechanism can limit the connection of the counterweight mechanism together, and the counterweight base supporting mechanism, the counterweight mechanism and the counterweight mounting mechanism are tightly fixed together by engaging the counterweight mounting mechanism with the counterweight base supporting mechanism. Finally, the counterweight mechanism and the counterweight mounting mechanism are further reinforced and connected together by the counterweight reinforcement mechanism. The overall structure is simple, which not only improves the loading and unloading efficiency of the counterweight device for crane, but also improves the safety attributes of the counterweight device for crane, making its overall structure safer, more reliable and less likely to fall.

[0004] Since multiple counterweight bodies are stacked together, when the middle counterweight is damaged and needs to be replaced, it is necessary to remove the multiple counterweight bodies on the upper side for replacement. It is inconvenient to remove the middle counterweight body separately, which reduces its practicality. In addition, the hydraulic cylinder structure it adopts has a relatively high cost. In addition, the counterweight body is a flat plate structure, which is not convenient for lifting the counterweight. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the problems existing in the prior art, the utility model provides a counterweight device for a crane to solve the technical problems mentioned in the background technology.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a counterweight device for a crane, comprising a base and a plurality of counterweight bodies, the top end of the base being fixedly connected to two vertical plates, the top ends of the two vertical plates being fixedly connected to a top plate, the two vertical plates being provided with a plurality of slots at opposite ends, the plurality of counterweight bodies being located in the middle of the two vertical plates, both ends of the plurality of counterweight bodies being fixedly connected to insertion strips, the middle positions of the side ends of the insertion strips being provided with card slots, the side ends of the vertical plates being provided with two first grooves at positions corresponding to the slots, the side ends of the two first grooves being provided with mounting grooves connected with the slots, the size of the first groove being larger than the size of the mounting groove, and fixing mechanisms being installed inside the first grooves and the mounting grooves, so as to facilitate the separate disassembly and replacement of the corresponding counterweight bodies, thereby improving the practicability of its use, avoiding the use of structures such as hydraulic cylinders to fix the counterweight bodies, thereby reducing the cost of its use.

[0009] The utility model is further configured such that the top of each counterweight body is fixedly connected with four lifting ears, and the bottom of each counterweight body is provided with a through groove penetrating the counterweight body at a position corresponding to the lifting ears, so as to facilitate lifting of the counterweight.

[0010] The utility model is further configured as follows: the fixing mechanism includes a square plate adapted to the first groove, the side end of the square plate is fixedly connected with a fixing column adapted to the mounting groove, the end of the fixing column away from the square plate is provided with a square groove, a square column is slidably provided inside the square groove, a sliding rod is installed on the square column, the sliding rod is slidably matched with the fixing column, a compression spring is provided on the outer sleeve of the sliding rod, and a pull plate is fixedly connected to the other end of the sliding rod, so that the insertion strip can be fixed conveniently through the fixing mechanism.

[0011] The utility model is further configured such that the square plate and the fixed column are provided with a second groove matched with the pull plate, and the pull plate is inserted into the interior of the second groove, which facilitates the insertion of the pull plate into the interior of the second groove, so that the side end faces of the pull plate, the side end faces of the square plate and the side end faces of the vertical plate are flush, thereby ensuring the flatness of the side faces of the vertical plate.

[0012] The utility model is further configured that a third groove is provided at the side end of the pull plate, and a pull rod is fixedly connected inside the third groove to facilitate pulling the pull plate to move.

[0013] The utility model is further configured that the square column is fixedly connected to the slide rod by a first screw, so that the square column can be easily disassembled.

[0014] The utility model is further configured that a countersunk groove is provided at the side end of the square column, so that the screw head of the first screw is located inside the countersunk groove.

[0015] The utility model is further configured such that the side end of the vertical plate is threadedly connected with a second screw that cooperates with the fixing column. The second screw is tightened so that the side end of the second screw is tightly pressed against the side end of the fixing column, thereby facilitating fixing the fixing column inside the installation groove.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the utility model provides a counterweight device for a crane, which has the following

[0018] Beneficial effects:

[0019] 1. When it is necessary to disassemble the counterweight body in the middle position, separate the corresponding fixing mechanism from the counterweight body, and then push the corresponding counterweight body out from the middle of the two vertical plates. This makes it easy to disassemble and replace the corresponding counterweight body separately, thereby improving its practicality.

[0020] 2. By inserting the insert into the slot and fixing the insert through two corresponding fixing mechanisms, the counterweight body is installed in the middle of the two vertical plates, which avoids the use of structures such as hydraulic cylinders to fix the counterweight body and reduces its use cost.

[0021] 3. Four lifting ears are fixedly connected through the top of the counterweight body. Hook the lifting hook on the lifting ear or tie the lifting rope to the lifting ear to facilitate lifting the counterweight body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front structural schematic diagram of a counterweight device for a crane in the utility model;

[0023] Figure 2 This is a schematic diagram of the side structure of a counterweight device for a crane in the utility model;

[0024] Figure 3 for Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0025] Figure 4 It is a schematic diagram of a partial cross-sectional structure of the connection between the fixing mechanism and the counterweight body and other structures in the utility model;

[0026] Figure 5 It is a side structural schematic diagram of the fixing mechanism in the utility model.

[0027] In the figure: 1. base; 2. counterweight body; 3. vertical plate; 4. top plate; 5. slot; 6. insert strip; 7. card slot; 8. first groove; 9. mounting groove; 10. lifting ear; 11. through groove; 12. square plate; 13. fixing column; 14. square groove; 15. square column; 16. sliding rod; 17. compression spring; 18. pull plate; 19. second groove; 20. third groove; 21. pull rod; 22. first screw; 23. countersunk groove; 24. second screw. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0030] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0031] See also Figure 1-5 A counterweight device for a crane comprises a base 1 and a plurality of counterweight bodies 2, the top of the base 1 is fixedly connected to two vertical plates 3, the tops of the two vertical plates 3 are fixedly connected to a top plate 4, the two vertical plates 3 are provided with a plurality of slots 5 at opposite ends, the plurality of counterweight bodies 2 are located in the middle of the two vertical plates 3, both ends of the plurality of counterweight bodies 2 are fixedly connected to an insertion strip 6, a card slot 7 is provided at the middle position of the side end of the insertion strip 6, two first grooves 8 are provided at the side ends of the vertical plates 3 corresponding to the slots 5, the side ends of the two first grooves 8 are provided with mounting grooves 9 connected with the slots 5, the size of the first grooves 8 is larger than the size of the mounting grooves 9, a fixing mechanism is installed inside the first grooves 8 and the mounting grooves 9, the top of each counterweight body 2 is fixedly connected to four lifting ears 10, and the bottom end of each counterweight is provided with a through groove 11 that penetrates the counterweight body 2 at a position corresponding to the lifting ears 10.

[0032] In this embodiment, when it is necessary to disassemble the counterweight body 2 in the middle position, the corresponding fixing mechanism is separated from the counterweight body 2, and then the corresponding counterweight body 2 is pushed out from the middle of the two vertical plates 3. This facilitates the individual disassembly and replacement of the corresponding counterweight body 2, thereby improving the practicality of its use. By inserting the insertion strip 6 into the interior of the slot 5 and fixing the insertion strip 6 through the corresponding two fixing mechanisms, the counterweight body 2 is installed in the middle of the two vertical plates 3. This avoids the use of structures such as hydraulic cylinders to fix the counterweight body 2, thereby reducing the cost of its use. Four lifting ears 10 are fixedly connected to the top of the counterweight body 2. By hooking the lifting hook on the lifting ear 10 or tying the lifting rope to the lifting ear 10, it is convenient to lift the counterweight body 2.

[0033] See also Figure 4 and Figure 5 The fixing mechanism includes a square plate 12 adapted to the first groove 8, and the side end of the square plate 12 is fixedly connected with a fixing column 13 adapted to the mounting groove 9. The side end of the vertical plate 3 is threadedly connected with a second screw 24 that matches the fixing column 13. The second screw 24 is tightened so that the side end of the second screw 24 is tightly pressed against the side end of the fixing column 13, so as to fix the fixing column 13 inside the mounting groove 9. A square groove 14 is provided at one end of the fixing column 13 away from the square plate 12, and a square column 15 is slidingly provided inside the square groove 14. A sliding rod 16 is installed on the square column 15. The square column 15 is fixedly connected to the sliding rod 16 by the first screw 22, so as to facilitate the disassembly of the square column 15. A countersunk groove 23 is provided on the side end of the square column 15. The screw head of the first screw 22 is located inside the countersunk groove 23, the slide rod 16 is slidably matched with the fixed column 13, the outer sleeve of the slide rod 16 is provided with a compression spring 17, the other end of the slide rod 16 is fixedly connected with a pull plate 18, and the square plate 12 and the fixed column 13 are provided with a second groove 19 adapted to the pull plate 18. The pull plate 18 is inserted into the inside of the second groove 19, which is convenient for inserting the pull plate 18 into the inside of the second groove 19, so that the side end surface of the pull plate 18, the side end surface of the square plate 12 and the side end surface of the vertical plate 3 are flush, ensuring the flatness of the side surface of the vertical plate 3, and the side end of the pull plate 18 is provided with a third groove 20, and the inside of the third groove 20 is fixedly connected with a pull rod 21, which is convenient for pulling the pull plate 18 to move.

[0034] In this embodiment, the fixing column 13 is inserted into the interior of the installation groove 9, and the square plate 12 is inserted into the interior of the first groove 8. At this time, the side end of the fixing column 13 is flush with the side end of the slot 5. Then, by tightening the second screw 24, the side end of the second screw 24 is pressed against the side end of the fixing column 13 to fix the fixing column 13. The square column 15 is pushed to move by the compression spring 17 and inserted into the slot 5. The two square columns 15 corresponding to the slot 5 are inserted into the two sides of the card slot 7, thereby fixing the insertion strip 6. The hook is inserted into the interior of the third groove 20 and hooked on the pull rod 21. The pull rod 21, the pull plate 18, the slide rod 16 and the square column 15 are pulled by the hook to move the square column 15 to the interior of the square groove 14, so that the square column 15 is separated from the card slot 7, which is convenient for pulling out the insertion strip 6 from the inside of the slot 5 and for disassembling the counterweight body 2.

[0035] In summary, when the overall equipment is in use:

[0036] When installing the counterweight body 2, the counterweight body 2 is installed in the middle of the two vertical plates 3 by inserting the insertion strip 6 into the slot 5, and the side end of the counterweight body 2 is flush with the side end of the vertical plate 3, and then the fixing column 13 is inserted into the installation groove 9, and the square plate 12 is inserted into the first groove 8. At this time, the side end of the fixing column 13 is flush with the side end of the slot 5, and then the second screw 24 is tightened to make the side end of the second screw 24 tightly against the side end of the fixing column 13 to fix the fixing column 13, and the square column 15 is pushed to move by the compression spring 17, and the square column 15 is inserted into the slot 5, so that the two square columns 15 corresponding to the slot 5 are inserted into the two sides of the card slot 7, thereby fixing the insertion strip 6;

[0037] When disassembling the corresponding counterweight body 2, insert the hook into the inside of the third groove 20 and hook it on the pull rod 21. Pull the pull rod 21, the pull plate 18, the slide bar 16 and the square column 15 by the hook to move. First, pull the two side square columns 15 on one side to move so that the square columns 15 are separated from the slot 7. Then, push the counterweight body 2 to move through the corresponding equipment (such as a forklift) so that the two clamping columns on the other side contact the side ends of the slot 7. At this time, the four lifting ears 10 are exposed. Then, hook the lifting hook on the lifting ear 10 or tie the lifting rope to the lifting ear 10, lift the counterweight body 2 by a crane, and then pull the other two fixing mechanisms to separate the clamping column from the slot 7. Then, pull the counterweight body 2 out from the middle of the two vertical plates 3, so that the corresponding counterweight body 2 can be disassembled separately.

[0038] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A counterweight device for a crane, comprising a base (1) and a plurality of counterweight bodies (2), wherein: The top of the base (1) is fixedly connected to two vertical plates (3), the tops of the two vertical plates (3) are fixedly connected to a top plate (4), the two vertical plates (3) are each provided with a plurality of slots (5) at one opposite end, the plurality of counterweight bodies (2) are each located in the middle of the two vertical plates (3), the two ends of the plurality of counterweight bodies (2) are each fixedly connected to an insertion strip (6), a clamping slot (7) is provided at the middle position of the side end of the insertion strip (6), two first grooves (8) are provided at the side ends of the vertical plates (3) at positions corresponding to the slots (5), the side ends of the two first grooves (8) are provided with mounting grooves (9) connected to the slots (5), the size of the first grooves (8) is larger than the size of the mounting grooves (9), and fixing mechanisms are installed inside the first grooves (8) and the mounting grooves (9).

2. A counterweight device for a crane according to claim 1, characterized in that: Four lifting ears (10) are fixedly connected to the top of each counterweight body (2), and a through slot (11) penetrating the counterweight body (2) is arranged at a position corresponding to the lifting ears (10) at the bottom of each counterweight.

3. A counterweight device for a crane according to claim 1, characterized in that: The fixing mechanism comprises a square plate (12) matched with the first groove (8), a side end of the square plate (12) is fixedly connected with a fixing column (13) matched with the mounting groove (9), a square groove (14) is arranged at one end of the fixing column (13) away from the square plate (12), a square column (15) is slidably arranged inside the square groove (14), a sliding rod (16) is installed on the square column (15), the sliding rod (16) and the fixing column (13) are slidably matched, a compression spring (17) is sleeved on the outside of the sliding rod (16), and a pull plate (18) is fixedly connected to the other end of the sliding rod (16).

4. A counterweight device for a crane according to claim 3, characterized in that: The square plate (12) and the fixing column (13) are provided with a second groove (19) adapted to the pull plate (18), and the pull plate (18) is inserted into the interior of the second groove (19).

5. A counterweight device for a crane according to claim 4, characterized in that: A third groove (20) is provided at the side end of the pull plate (18), and a pull rod (21) is fixedly connected inside the third groove (20).

6. A counterweight device for a crane according to claim 3, characterized in that: The square column (15) is fixedly connected to the sliding rod (16) via a first screw (22).

7. A counterweight device for a crane according to claim 4, characterized in that: The side end of the square column (15) is provided with a countersunk groove (23).

8. A counterweight device for a crane according to claim 3, characterized in that: The side end of the vertical plate (3) is threadedly connected with a second screw (24) that cooperates with the fixing column (13).

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