A tongs for a rolling mill

Abstract

This utility model belongs to the field of lifting clamp technology, specifically disclosing a lifting clamp for a steel rolling mill, including: an assembly ring, a first connecting rod, a first rotating frame, a first gripper, a first limiting rod, and a limiting frame; a protective component, which includes a first fixed frame, a first rotating rod, a chain, a second fixed frame, and a second rotating rod. The first fixed frame is fixed to one side of the limiting frame, the first rotating rod rotates and passes through the interior of the first fixed frame, the chain passes through the lower end of the first rotating rod, the second fixed frame is fixed to the other side of the limiting frame, the second rotating rod rotates and passes through the interior of the second fixed frame, a fixing hole is opened at the lower end of the second rotating rod, and a fixing rod passes through the fixing hole; one end of the fixing rod has a slot. This utility model has the advantage of ensuring that the workpiece is securely fixed to the lifting clamp during the lifting process, greatly reducing the risk of safety accidents caused by workpiece slippage or shaking, and improving the safety of workpiece lifting.

Description

Technical Field

[0001] This utility model relates to the field of lifting clamp technology, and in particular to a lifting clamp for steel rolling mills. Background Technology

[0002] The lifting clamps used in steel rolling mills are specialized tools mainly used for material handling and processing operations in the steel production process. By using lifting clamps, workpieces can be clamped and lifted quickly and accurately, greatly reducing auxiliary time and improving production efficiency.

[0003] A search revealed Chinese Patent Publication No. CN215854640U, which discloses a lifting clamp with a safety protection mechanism for steel rolling mills. The clamp includes a main body with a clamp frame assembly ring. A connecting block is fixedly installed at the bottom end of the clamp frame assembly ring. This invention, by incorporating a clamp frame assembly ring, a fixed shaft, a connecting block, a first connecting rod, a second connecting rod, a first gripper, a second gripper, an anti-slip block, an insertion limiting groove, an insertion limiting block, a first magnet, and a second magnet, effectively prevents slippage on the workpiece using the anti-slip block. The insertion limiting block, inserted into the limiting groove, effectively protects the workpiece between the second and first grippers. By adjusting the opening degree between the second and first grippers, the clamp opening can be controlled to a safe distance at its limit position, meeting equipment operating requirements and reducing the accident rate while preventing human error.

[0004] In the aforementioned utility model, lifting clamps without safety protection devices cannot effectively prevent accidents such as workpiece slippage or detachment during hoisting, thereby increasing the risk of worker injury. Therefore, it is necessary to provide a lifting clamp that can reinforce the workpiece and improve the safety of hoisting. Utility Model Content

[0005] The purpose of this utility model is to provide a lifting clamp for steel rolling mills to solve the problem mentioned in the background art, where lifting clamps without safety protection devices cannot effectively prevent accidents such as workpiece slippage or detachment during operation, thereby increasing the risk of worker injury.

[0006] To achieve the above objectives, the basic solution provided by this utility model is as follows: a lifting clamp for a steel rolling mill, comprising an assembly ring, a first connecting rod, a first rotating frame, a first gripper, a first limiting rod, and a limiting frame. The first connecting rod is rotatably installed inside the assembly ring, the first rotating frame is rotatably installed in the middle of the outer surface of the first connecting rod, the first gripper is rotatably installed at the lower end of the first connecting rod, the first limiting rod is fixed to one side of the first gripper, the limiting frame is slidably installed on the outer surface of the first limiting rod, and the other end of the first rotating frame is installed in the middle of the limiting frame.

[0007] The protective assembly includes a first fixed frame, a first rotating rod, a chain, a second fixed frame, and a second rotating rod. The first fixed frame is fixed to one side of the limiting frame, the first rotating rod rotates and passes through the interior of the first fixed frame, the chain passes through the lower end of the first rotating rod, the second fixed frame is fixed to the other side of the limiting frame, and the second rotating rod rotates and passes through the interior of the second fixed frame.

[0008] Furthermore, the assembly ring has a second connecting rod that rotates through its interior, a second rotating frame that rotates through the middle of the second connecting rod, a second gripper that is rotatably mounted at the lower end of the second connecting rod, a second limiting rod that is fixed to one side of the second gripper, and the second limiting rod that slides through the inside of the limiting frame.

[0009] Furthermore, a fixing hole is provided at the lower end of the second rotating rod, and a fixing rod passes through the fixing hole. A slot is provided at one end of the fixing rod, and a connecting block is fixed to one side of the lower end of the second rotating rod.

[0010] Furthermore, a mounting hole is provided on one side of the connecting block, a spring is fixed inside the mounting hole, a locking pin is fixed at one end of the spring, and the end of the locking pin extends into the locking groove.

[0011] Furthermore, it also includes a reinforcement component, which includes a threaded hole, a threaded rod, and a rubber block. The threaded hole is located at the lower end of the first and second grippers, the threaded rod is threaded through the inside of the threaded hole, and the rubber block is fixed to one end of the threaded rod.

[0012] Furthermore, a handle is fixed to the other end of the threaded rod, and the rubber block is in contact with the workpiece.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] 1. This utility model, through its assembly ring, first connecting rod, first rotating frame, first gripper, first limiting rod, limiting frame, and protective components, allows for efficient hoisting. First, the workpiece is placed between the first and second grippers. Then, the hoisting assembly ring is raised, causing the first and second connecting rods to move upwards. Next, the lower ends of the first and second connecting rods converge towards the center, clamping the workpiece with the first and second grippers. Finally, the first and second rotating rods come into contact with the workpiece. Next, pass the chain through the bottom of the workpiece, and pass the other end of the chain through the lower end of the second rotating rod to a suitable position. Pass the fixing rod through the fixing hole and the chain, and then press the locking pin outward to compress the spring inside the mounting hole. When the locking groove and the locking pin are aligned, under the elastic force of the spring, the end of the locking pin extends into the locking groove, fixing the fixing rod and securing the workpiece. This ensures that the workpiece is firmly fixed to the lifting clamp during the hoisting process, greatly reducing the risk of safety accidents caused by the workpiece slipping or shaking, and improving the safety of workpiece hoisting.

[0015] 2. Through the assembly ring, first connecting rod, first rotating frame, first gripper, first limiting rod, limiting frame and reinforcement components, after the workpiece is clamped, the operator rotates the handle, and the handle drives the threaded rod to rotate. With the cooperation of the threaded hole, the rubber block is pressed against the workpiece, effectively preventing the workpiece from loosening during the hoisting process. The operator can accurately control the pressure of the rubber block on the workpiece to meet the clamping requirements of different workpieces. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a lifting clamp for a steel rolling mill according to the present invention;

[0017] Figure 2 This is a schematic diagram of the protective component in a lifting clamp for a steel rolling mill according to this utility model;

[0018] Figure 3 This utility model Figure 1 Enlarged view of point A in the image;

[0019] Figure 4 This is an exploded view of the reinforcing component in a lifting clamp for a steel rolling mill according to this utility model. Detailed Implementation

[0020] The present invention will be further described in detail below through specific embodiments:

[0021] The reference numerals in the accompanying drawings include: 11, assembly ring; 12, first connecting rod; 121, first rotating frame; 13, first gripper; 131, first limiting rod; 14, limiting frame; 15, second connecting rod; 151, second rotating frame; 16, second gripper; 161, second limiting rod; 21, first fixing frame; 22, first rotating rod; 23, chain; 24, second fixing frame; 25, second rotating rod; 26, fixing hole; 27, fixing rod; 271, slot; 28, connecting block; 281, mounting hole; 29, spring; 291, locking post; 31, threaded hole; 32, threaded rod; 33, rubber block; 34, handle.

[0022] like Figures 1 to 4 As shown: A lifting clamp for a steel rolling mill includes an assembly ring 11, a first connecting rod 12, a first rotating frame 121, a first gripper 13, a first limiting rod 131, and a limiting frame 14. The first connecting rod 12 is rotatably installed inside the assembly ring 11. The first rotating frame 121 is rotatably installed in the middle of the outer surface of the first connecting rod 12. The first gripper 13 is rotatably installed at the lower end of the first connecting rod 12. The first limiting rod 131 is fixed to one side of the first gripper 13. The limiting frame 14 is slidably installed on the outer surface of the first limiting rod 131, and the other end of the first rotating frame 121 is installed in the middle of the limiting frame 14. A second connecting rod 15 is rotatably passed through the interior of the assembly ring 11. The second rotating frame 151 is rotatably passed through the middle of the second connecting rod 15. A second gripper 16 is rotatably installed at the lower end of the second connecting rod 15. A second limiting rod 161 is fixed to one side of the second gripper 16, and the second limiting rod 161 slidably passes through the interior of the limiting frame 14.

[0023] The first gripper 13 and the second gripper 16 are components that directly contact and clamp the workpiece. The first limiting rod 131 and the second limiting rod 161 are used to limit the rotation range of the grippers and ensure the accuracy of the clamping action.

[0024] The protective assembly includes a first fixed frame 21, a first rotating rod 22, a chain 23, a second fixed frame 24, and a second rotating rod 25. The first fixed frame 21 is fixed to one side of the limiting frame 14. The first rotating rod 22 rotates and passes through the interior of the first fixed frame 21. The chain 23 passes through the lower end of the first rotating rod 22. The second fixed frame 24 is fixed to the other side of the limiting frame 14. The second rotating rod 25 rotates and passes through the interior of the second fixed frame 24.

[0025] The first fixed frame 21 and the second fixed frame 24 are respectively fixed on both sides of the limiting frame 14 to provide a stable installation base for the protective components. The first rotating rod 22 and the second rotating rod 25 provide support and guidance for the iron chain 23, which is used to bind and fix the workpiece.

[0026] The lower end of the second rotating rod 25 is provided with a fixing hole 26, and a fixing rod 27 passes through the fixing hole 26. One end of the fixing rod 27 is provided with a slot 271, and a connecting block 28 is fixed on one side of the lower end of the second rotating rod 25.

[0027] A mounting hole 281 is provided on one side of the connecting block 28. A spring 29 is fixed inside the mounting hole 281. A locking post 291 is fixed at one end of the spring 29, and the end of the locking post 291 extends into the locking groove 271.

[0028] The fixing rod 27 is used to fix and protect the iron chain 23. The locking pin 291 is fixed to one end of the spring 29 and extends into the locking groove 271 of the fixing rod 27 to lock the position of the fixing rod 27. When it is necessary to adjust or replace the iron chain 23, the spring 29 can be compressed by pressing the locking pin 291, thereby unlocking the fixing rod 27, which is convenient for operation and maintenance.

[0029] Working principle:

[0030] During hoisting, the workpiece is first placed between the first clamp 13 and the second clamp 16. Then, the hoist assembly ring 11 is installed. The assembly ring 11 drives the first connecting rod 12 and the second connecting rod 15 to move upward. Then, the lower ends of the first connecting rod 12 and the second connecting rod 15 are brought together in the middle. The lower ends of the first connecting rod 12 and the second connecting rod 15 drive the first clamp 13 and the second clamp 16 to clamp the workpiece. Then, the first rotating rod 22 and the second rotating rod 25 come into contact with the workpiece. Then, the iron chain 23 is passed through the bottom of the workpiece. The other end of the iron chain 23 is passed through the lower end of the second rotating rod 25 to reach the appropriate position. The fixing rod 27 is passed through the fixing hole 26 and the iron chain 23. Then, the locking pin 291 is pressed outward, so that the spring 29 is compressed inside the mounting hole 281. When the locking groove 271 and the locking pin 291 are aligned, under the elastic force of the spring 29, the end of the locking pin 291 extends into the locking groove 271, fixing the fixing rod 27.

[0031] This step involves securing the workpiece, ensuring it is firmly fixed to the lifting clamps during hoisting. This significantly reduces the risk of accidents caused by workpiece slippage or shaking, and improves the safety of workpiece hoisting.

[0032] Please see Figures 1 to 4 As shown; this embodiment, based on the above embodiment, further includes:

[0033] The reinforcement component includes a threaded hole 31, a threaded rod 32, and a rubber block 33. The threaded hole 31 is opened at the lower end of the first clamp 13 and the second clamp 16. The threaded rod 32 is threaded through the inside of the threaded hole 31. The rubber block 33 is fixed to one end of the threaded rod 32.

[0034] The other end of the threaded rod 32 is fixed with a handle 34, and the rubber block 33 is in contact with the workpiece;

[0035] The threaded hole 31 provides an installation position for the threaded rod 32, allowing the threaded rod 32 to be tightly engaged with the gripper to form a stable connection structure. By rotating the threaded rod 32, it can move back and forth inside the threaded hole 31, thereby driving the rubber block 33 to apply different pressures to the workpiece. When the operator rotates the handle 34, the threaded rod 32 will rotate accordingly and convert the rotational motion into linear motion, pushing the rubber block 33 closer to or away from the workpiece.

[0036] Working principle:

[0037] After clamping the workpiece, the operator rotates the handle 34, which in turn drives the threaded rod 32 to rotate. With the cooperation of the threaded hole 31, the rubber block 33 presses against the workpiece, effectively preventing the workpiece from loosening during the hoisting process. The operator can precisely control the pressure of the rubber block 33 on the workpiece to meet the clamping requirements of different workpieces.

[0038] This step enhances operational flexibility and improves the versatility of the equipment, providing an efficient, safe, and flexible solution for workpiece hoisting operations.

[0039] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A lifting clamp for a steel rolling mill, characterized in that, include: Assembly ring (11), first connecting rod (12), first rotating frame (121), first gripper (13), first limiting rod (131) and limiting frame (14). The first connecting rod (12) is rotatably installed inside the assembly ring (11). The first rotating frame (121) is rotatably installed in the middle of the outer surface of the first connecting rod (12). The first gripper (13) is rotatably installed at the lower end of the first connecting rod (12). The first limiting rod (131) is fixed on one side of the first gripper (13). The limiting frame (14) is slidably installed on the outer surface of the first limiting rod (131). The other end of the first rotating frame (121) is installed in the middle of the limiting frame (14). The protective assembly includes a first fixed frame (21), a first rotating rod (22), a chain (23), a second fixed frame (24), and a second rotating rod (25). The first fixed frame (21) is fixed to one side of the limiting frame (14). The first rotating rod (22) rotates through the inside of the first fixed frame (21). The chain (23) passes through the lower end of the first rotating rod (22). The second fixed frame (24) is fixed to the other side of the limiting frame (14). The second rotating rod (25) rotates through the inside of the second fixed frame (24).

2. The lifting clamp for a steel rolling mill according to claim 1, characterized in that, The assembly ring (11) has a second connecting rod (15) that rotates through its interior. The middle part of the second connecting rod (15) has a second rotating frame (151) that rotates through its center. The lower end of the second connecting rod (15) is rotatably fitted with a second gripper (16). A second limiting rod (161) is fixed to one side of the second gripper (16), and the second limiting rod (161) slides through the inside of the limiting frame (14).

3. A lifting clamp for a steel rolling mill according to claim 1, characterized in that, The lower end of the second rotating rod (25) is provided with a fixing hole (26), and a fixing rod (27) passes through the fixing hole (26). One end of the fixing rod (27) is provided with a slot (271), and a connecting block (28) is fixed on one side of the lower end of the second rotating rod (25).

4. A lifting clamp for a steel rolling mill according to claim 3, characterized in that, The connecting block (28) has a mounting hole (281) on one side. A spring (29) is fixed inside the mounting hole (281). A locking post (291) is fixed at one end of the spring (29), and the end of the locking post (291) extends into the locking groove (271).

5. A lifting clamp for a steel rolling mill according to claim 1, characterized in that, It also includes a reinforcement component, which includes a threaded hole (31), a threaded rod (32) and a rubber block (33). The threaded hole (31) is opened at the lower end of the first clamp (13) and the second clamp (16). The threaded rod (32) is threaded through the threaded hole (31). The rubber block (33) is fixed to one end of the threaded rod (32).

6. A lifting clamp for a steel rolling mill according to claim 5, characterized in that, The other end of the threaded rod (32) is fixed with a handle (34), and the rubber block (33) is in contact with the workpiece.

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