A wrench chain

Abstract

The utility model relates to the field of spanner chain, disclose a spanner chain, including a plurality of outer chain board, each two outer chain board between sliding connection has a plurality of inner chain board, each outer chain board and inner chain board both ends are all provided with connecting hole, each inner chain board top is all provided with a plurality of friction groove, each two inner chain board top is all provided with fixed assembly, wherein several outer chain board inside sliding connection has fixed cylinder, wherein several outer chain board inside sliding connection has connecting cylinder, be provided with connecting assembly between fixed cylinder and connecting cylinder. In the utility model, first anticlockwise rotation connecting cylinder to make spacing strip from the deepest place of sliding slot and then draw out fixed cylinder to the outside chain board and inner chain board are unlocked to reach the effect that the length of chain can be adjusted according to the demand, avoid the problem that the length of chain can be adjusted only by other tools, thereby improve the high efficiency of spanner chain.

Description

Technical Field

[0001] This utility model relates to the field of wrench chains, and more particularly to a wrench chain. Background Technology

[0002] A wrench chain is the core component of a chain wrench. It consists of an adjustable chain, toothed jaws, and a long handle. It tightens or loosens workpieces by wrapping around them and using leverage. The reason for using a wrench chain is that it can be adapted to round or near-round workpieces of different diameters by adjusting its length, reducing tooling costs. It has a large contact area with the workpiece and strong friction, which can firmly clamp workpieces with uneven surfaces and prevent slippage. Its flexibility allows it to operate flexibly in confined spaces and easily bypass obstacles. The long handle leverage effect can apply a large torque, reducing the intensity of operation, while minimizing damage to the workpiece surface and protecting fragile or high-precision surfaces. Therefore, it is widely used in pipeline repair, equipment maintenance, and other scenarios.

[0003] The working principle of a wrench chain is to adjust the length of the chain so that it tightly wraps around a round or irregular workpiece. The friction generated between the anti-slip structure on the inside of the chain and the surface of the workpiece achieves a firm grip and prevents slippage. At the same time, the operator turns the long handle connected to the chain, using the lever principle to amplify the hand force into torque, which is then transmitted to the workpiece through the chain, thereby completing the tightening or loosening operation. This design, with the flexibility of the chain, can adapt to workpieces of different sizes and shapes, and can be operated flexibly in confined spaces. It makes up for the shortcomings of traditional wrenches, such as poor adaptability to irregular or large-diameter workpieces and the difficulty in operating them in limited space.

[0004] However, a significant drawback remains in the actual use of chain wrenches: adjusting the chain length often requires additional tools such as screwdrivers and pliers. For example, traditional chain wrenches rely on bolt-locking mechanisms for length adjustment. Operators must first loosen the bolts, stretch or retract the chain to the appropriate length, and then retighten it. This process involves numerous steps, and in scenarios such as working at heights or in confined spaces, the retrieval and operation of these additional tools become even more cumbersome. This reliance on external tools not only prolongs the preparation time for adapting the tool to the workpiece and reduces the efficiency of continuous operation, but also leads to operational interruptions due to tool shortages. This problem is particularly pronounced in emergency repairs or situations requiring frequent changes in workpiece dimensions, significantly impacting efficiency. Summary of the Invention To overcome the above shortcomings, this utility model provides a wrench chain, which aims to improve the problem in the prior art that other tools are needed to adjust the length of the chain during equipment use.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a wrench chain, comprising multiple outer chain plates, with multiple inner chain plates slidably connected between every two outer chain plates, each outer chain plate and inner chain plate having connecting holes at both ends, each inner chain plate having multiple friction grooves at its top, each pair of inner chain plates having a fixing component at its top, wherein several outer chain plates have fixing cylinders slidably connected inside, and several outer chain plates have connecting cylinders slidably connected inside, and a connecting component is provided between the fixing cylinders and the connecting cylinders; The connecting assembly includes a connecting ring, multiple sliding grooves, a docking groove, and multiple limiting strips. One end of the connecting ring is fixedly connected to one end of the fixed cylinder. Each sliding groove is formed on the outer wall of the connecting ring, the docking groove is formed inside the connecting cylinder, and one side of each limiting strip is fixedly connected to the inner wall of the connecting cylinder.

[0006] The above technical solution achieves the effect of changing the chain length. Preferably, each of the fixing components includes a rubber block and a plurality of rubber protrusions, the inner wall of the rubber block is slidably connected to the outer wall of the inner chain plate, and the bottom of each rubber protrusion is fixedly connected to the top of the rubber block.

[0007] The above technical solution achieves the effect of fixing the object that needs to be moved. Preferably, each of the inner chain plates has a fixing hole inside, and each of the rubber blocks has a fixing post fixedly connected to its inner wall.

[0008] The above technical solution achieves the effect of connecting the rubber blocks. Preferably, each of the fixed posts is fixedly connected to a plurality of limiting blocks at one end, and each of the fixed posts is fixedly connected to a docking ring at one end.

[0009] The above technical solution achieves the effect of connecting fixed column one and fixed column two. Preferably, each of the rubber blocks has a fixed post 2 fixedly connected to its inner wall, and each of the fixed posts 2 has a rotating post rotatably connected inside it.

[0010] The above technical solution achieves the effect of fixing the rubber block. Preferably, a lever is fixedly connected to one end of each of the rotating columns, and a limiting strip is fixedly connected to the other end of each of the rotating columns.

[0011] The above technical solution achieves the effect of locking the rubber block. Preferably, the outer wall of each of the rotating columns is rotatably connected to the inside of the rubber block, and the outer wall of each of the limiting strips is slidably connected to the inside of the limiting block.

[0012] The above technical solution achieves the effect of fixing the rubber block. Preferably, one end of each of the fixed posts is slidably connected to one end of the fixed post, and the outer wall of each docking ring is slidably connected to the inside of the fixed post.

[0013] The above technical solution achieves the effect of connecting fixed column one and fixed column two. This utility model has the following beneficial effects: 1. In this utility model, first hold the connecting cylinder and rotate it counterclockwise to disengage the limiting strip from the deepest part of the sliding groove. Then, hold the fixing cylinder and pull it outward to completely disengage the limiting strip from the inside of the sliding groove, thereby unlocking the outer chain plate and the inner chain plate. This achieves the effect of adjusting the chain length as needed during equipment use, avoiding the need for other tools to adjust the chain length during equipment use, thus improving the efficiency of the wrench chain.

[0014] 2. In this utility model, first hold the lever and rotate it counterclockwise to disengage the limiting bar from the inside of the limiting block. Then, hold both sides of the rubber block and pull it outward to completely disengage the limiting bar from the inside of the limiting block, thereby unlocking the rubber block. This achieves the effect of changing the shape of the rubber block according to the shape of the object to be turned during the use of the equipment, avoiding the problem of needing to use different chains to turn different shaped objects during the use of the equipment, thus improving the practicality of the wrench chain. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of a wrench chain proposed in this utility model; Figure 2 This is a schematic diagram of the exploded structure of the fixing cylinder of a wrench chain proposed in this utility model; Figure 3 for Figure 2 A magnified view of the structure at point A in the middle; Figure 4 This is a schematic diagram of the exploded structure of the rubber block of a wrench chain proposed in this utility model; Figure 5 for Figure 4 A magnified schematic diagram of the structure at point B in the middle.

[0016] Legend: 1. Outer chain plate; 2. Inner chain plate; 3. Connecting hole; 4. Friction groove; 5. Fixing cylinder; 6. Connecting ring; 7. Sliding groove; 8. Connecting cylinder; 9. Docking groove; 10. Limiting strip; 11. Rubber block; 12. Rubber protrusion; 13. Fixing hole; 14. Fixing post one; 15. Limiting block; 16. Docking ring; 17. Fixing post two; 18. Rotating post; 19. Actuating strip; 20. Restricting strip. Detailed Implementation

[0017] Reference Figures 1-3 The present invention provides an embodiment of a wrench chain, comprising multiple outer chain plates 1, with multiple inner chain plates 2 slidably connected between each pair of outer chain plates 1 to form a chain. Each outer chain plate 1 and inner chain plate 2 has connecting holes 3 at both ends for connecting a fixing cylinder 5 and a connecting cylinder 8. Each inner chain plate 2 has multiple friction grooves 4 at its top for restricting the movement of the fixing components. Each pair of inner chain plates 2 has a fixing component at its top for fixing the object to be wrenched. Several outer chain plates 1 are slidably connected to fixing cylinders 5 for fixing cylinders 8, and several outer chain plates 1 are slidably connected to connecting cylinders 8 for connecting cylinders 5. A connecting component is provided between the fixing cylinders 5 and the connecting cylinders 8 for fixing the connecting cylinders 8 and the fixing cylinders 5. The connecting assembly includes a connecting ring 6, multiple sliding grooves 7, docking grooves 9, and multiple limiting strips 10. One end of the connecting ring 6 is fixedly connected to one end of the fixed cylinder 5 to connect the fixed cylinder 5 and the connecting cylinder 8. Each sliding groove 7 is opened on the outer wall of the connecting ring 6 to accommodate the limiting strip 10. The docking groove 9 is opened inside the connecting cylinder 8 to accommodate the connecting ring 6. One side of each limiting strip 10 is fixedly connected to the inner wall of the connecting cylinder 8 to limit the movement range of the connecting cylinder 8. Each fixing assembly includes a rubber block 11 and multiple rubber protrusions 12. The inner wall of the rubber block 11 is slidably connected to the outer wall of the inner chain plate 2 to connect the rubber protrusions 12. The bottom of each rubber protrusion 12 is fixedly connected to the top of the rubber block 11 to fix the item that needs to be moved. Specifically, when the chain length needs to be changed, first hold the connecting cylinder 8 with your hand and rotate it counterclockwise with a little force. As the rotation amplitude gradually increases, the limiting strip 10 will slowly come out from the deepest part of the sliding groove 7, and the originally tightly fitted state will slowly loosen. Then, hold the fixing cylinder 5 with your other hand and pull it out smoothly. During the process, the limiting strip 10 gradually slides out along the trajectory of the sliding groove 7 until it is completely separated from the sliding groove 7. At this time, the locking state between the outer chain plate 1 and the inner chain plate 2 is completely released, and the two are in a flexible state. After that, the length can be adjusted by increasing or decreasing the number of chain links according to the actual size requirements of the workpiece. The whole process does not require any additional tools and the operation is smooth and convenient.

[0018] Reference Figure 4 and Figure 5Each inner chain plate 2 has a fixing hole 13 inside to accommodate fixing post 14 and fixing post 27. Each rubber block 11 has a fixing post 14 fixedly connected to its inner wall for fixing the rubber block 11. Each fixing post 14 has multiple limiting blocks 15 fixedly connected to one end to limit the movement range of the limiting strip 20. Each fixing post 14 has a docking ring 16 fixedly connected to one end to connect fixing post 14 and fixing post 27. Each rubber block 11 has a fixing post 27 fixedly connected to its inner wall for fixing the rubber block 11. Each fixing post 27 has... Rotary columns 18 are rotatably connected to provide mechanical support for the rotation of the limiting strip 20. Each rotating column 18 has a lever 19 fixedly connected to one end for driving the limiting strip 20. The other end of each rotating column 18 is fixedly connected to the limiting strip 20 for connecting the first fixed column 14 and the second fixed column 17. The outer wall of each rotating column 18 is rotatably connected to the inside of the rubber block 11. The outer wall of each limiting strip 20 is slidably connected to the inside of the limiting block 15. One end of each first fixed column 14 is slidably connected to one end of the second fixed column 17. The outer wall of each docking ring 16 is slidably connected to the inside of the second fixed column 17.

[0019] Specifically, when it is necessary to replace the rubber block 11, first use your fingers to hold the groove of the lever 19 and rotate it counterclockwise with a little force. This will gradually loosen the engagement between the limiting strip 20 and the inner wall of the limiting block 15 until it is completely disengaged from the deepest part of the limiting block 15. At this time, hold the rubber block 11 with both hands and pull it outward with even force. During the process, you can see the limiting strip 20 sliding smoothly out along the groove of the limiting block 15. A gap will appear between the originally tightly fitted rubber block 11 and the inner chain plate 2. After the limiting strip 20 is completely disengaged from the inside of the limiting block 15, the locking state of the rubber block 11 will be completely released. The whole process does not require any additional tools and is smooth and effortless.

[0020] Working principle: When using the wrench chain, if the chain length needs to be changed, first hold the connecting cylinder 8 and rotate it counterclockwise to disengage the limiting strip 10 from the deepest part of the sliding groove 7. Then, hold the fixing cylinder 5 and pull it outward to completely disengage the limiting strip 10 from the sliding groove 7, thereby unlocking the outer chain plate 1 and the inner chain plate 2. Then, increase or decrease the chain length as needed. When the rubber block 11 needs to be replaced, first hold the lever 19 and rotate it counterclockwise to disengage the limiting strip 20 from the limiting block 15. Then, hold both sides of the rubber block 11 and pull it outward to completely disengage the limiting strip 20 from the limiting block 15, thereby unlocking the rubber block 11.

Claims

1. A wrench chain, comprising a plurality of outer chain plates (1), characterized in that: Multiple inner chain plates (2) are slidably connected between each pair of outer chain plates (1). Each outer chain plate (1) and inner chain plate (2) has a connecting hole (3) at both ends. Each inner chain plate (2) has multiple friction grooves (4) at the top. Each pair of inner chain plates (2) has a fixing component at the top. Several outer chain plates (1) are slidably connected to a fixing cylinder (5). Several outer chain plates (1) are slidably connected to a connecting cylinder (8). A connecting component is provided between the fixing cylinder (5) and the connecting cylinder (8). The connecting assembly includes a connecting ring (6), multiple sliding grooves (7), a docking groove (9), and multiple limiting strips (10). One end of the connecting ring (6) is fixedly connected to one end of the fixed cylinder (5). Each sliding groove (7) is opened on the outer wall of the connecting ring (6). The docking groove (9) is opened inside the connecting cylinder (8). One side of each limiting strip (10) is fixedly connected to the inner wall of the connecting cylinder (8).

2. A wrench chain according to claim 1, characterized in that: Each of the fixing components includes a rubber block (11) and a plurality of rubber protrusions (12), the inner wall of the rubber block (11) being slidably connected to the outer wall of the inner chain plate (2), and the bottom of each of the rubber protrusions (12) being fixedly connected to the top of the rubber block (11).

3. A wrench chain according to claim 2, characterized in that: Each inner chain plate (2) has a fixing hole (13) inside, and each rubber block (11) has a fixing post (14) fixedly connected to its inner wall.

4. A wrench chain according to claim 3, characterized in that; Each of the fixed posts (14) is fixedly connected to a plurality of limiting blocks (15) at one end, and each of the fixed posts (14) is fixedly connected to a docking ring (16) at one end.

5. A wrench chain according to claim 2, characterized in that: Each of the rubber blocks (11) has a fixed post 2 (17) fixedly connected to its inner wall, and each of the fixed post 2 (17) has a rotating post (18) rotatably connected inside its interior.

6. A wrench chain according to claim 5, characterized in that; Each of the rotating columns (18) has a lever (19) fixedly connected to one end, and a limiting strip (20) fixedly connected to the other end.

7. A wrench chain according to claim 6, characterized in that: The outer wall of each of the rotating columns (18) is rotatably connected to the inside of the rubber block (11), and the outer wall of each of the limiting strips (20) is slidably connected to the inside of the limiting block (15).

8. A wrench chain according to claim 4, characterized in that: One end of each of the first fixed post (14) is slidably connected to one end of the second fixed post (17), and the outer wall of each of the docking rings (16) is slidably connected to the inside of the second fixed post (17).

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