An adjustable wrench

Abstract

This utility model relates to an adjustable wrench. It includes a pliers head and a handle. The pliers head includes movable jaws, fixed jaws, an adjusting nut, and a fixing pin. One side of the handle's tail has a pipe-removing chain that can freely bend within a plane, and the other side of the handle's tail has a hook body capable of engaging the pipe-removing chain. The pipe-removing chain comprises several unit sections connected by hinges, with a hook hole between each two adjacent unit sections that mates with the hook body. The inner surface of the pipe-removing chain is the pipe-fitting contact surface, and the hook hole is located on the outer surface of the pipe-removing chain. By using the pipe-removing chain in conjunction with the hook body, it can be used for the disassembly and installation of pipes of various diameters and fasteners of various shapes, reducing the component damage rate during maintenance.

Description

Technical Field

[0001] This utility model relates to a wrench, and in particular discloses an adjustable wrench. Background Technology

[0002] Currently, the fixed assets of public tertiary hospitals generally consist of tens of thousands of pieces of equipment and facilities. In the management and maintenance of these equipment and facilities, there are thousands of types of screws, nuts, fasteners, pipe bearings and connectors involved in the core components of the equipment. In particular, for imported equipment, the proportion of non-standard fasteners and pipe bearings is very high. Conventional wrenches, sockets and toothed wrenches on the market cannot be fully matched, making maintenance and disassembly very difficult.

[0003] Currently, all fastener tightening tools, whether fixed or adjustable, can only be used on standard or regular-shaped fasteners. However, during equipment maintenance and upkeep in public tertiary hospitals, the following situations often arise: 1. Hospitals have a large number of imported medical equipment. For various reasons, the connection points of such equipment often use special bolts and nuts. If disassembly is required, the manufacturer needs to send a specialist with special tools. These tools are often custom-made by the manufacturer to increase maintenance revenue and are not available on the market. Therefore, in actual maintenance, the difficulty of disassembling and assembling a small part often greatly reduces work efficiency and increases maintenance costs.

[0004] 2. Some of the hospital's older equipment, especially large piping systems, are exposed to humid or acidic / alkaline environments for extended periods. This causes frequent loosening and tightening of pipe joints and fasteners, leading to corrosion or damage. As a result, standard tightening and loosening tools cannot be used, or forceful manipulation can damage the fasteners.

[0005] 3. Some fasteners on certain equipment do not protrude from the surface due to design requirements or other reasons, resulting in no leverage point on the working surface for these fasteners, and standard tightening and loosening tools cannot remove these fasteners. Summary of the Invention

[0006] The purpose of this utility model is to overcome the defects in the existing technology and provide an adjustable wrench that is widely adaptable to the disassembly and installation of pipes of various diameters and fasteners of various shapes, reduces the damage rate of parts during maintenance, improves work efficiency, and reduces maintenance costs.

[0007] This utility model is implemented as follows: An adjustable wrench includes a pliers head and a handle. The pliers head includes a movable jaw, a fixed jaw, an opening adjustment nut, and a fixing pin. One side of the tail of the handle is provided with a pipe disassembly chain that can be freely bent in a plane. The other side of the tail of the handle is provided with a hook body that can hook the pipe disassembly chain. The pipe disassembly chain includes several unit sections connected by hinges. Each unit section and / or between every two adjacent unit sections is provided with a hook hole that mates with the hook body. The inner surface of the pipe disassembly chain is the pipe contact surface, and the hook hole is located on the outer surface of the pipe disassembly chain.

[0008] The pipe fitting contact surface of the pipe fitting disassembly chain is provided with an anti-slip layer.

[0009] The unit section of the pipe fitting disassembly chain includes a first inner plate and a second inner plate arranged in parallel with each other. One end of the first inner plate is connected to one end of the second inner plate by a first pin, and the other end of the first inner plate is connected to the other end of the second inner plate by a second pin. The hinge includes a first outer plate, a second outer plate, a first pin, and a second pin; one end of the first pin is fixed to one end of the first outer plate, and the other end of the first pin passes sequentially through one end of the first inner plate, a first pin cylinder, and one end of the second inner plate of one unit section before being fixed to one end of the second outer plate; one end of the second pin is fixed to the other end of the first outer plate, and the other end of the second pin passes sequentially through the other end of the first inner plate, a second pin cylinder, and the other end of the second inner plate of another unit section before being fixed to the other end of the second outer plate; The hook hole is formed between the first pin and the second pin.

[0010] The first pin cylinder and the second pin cylinder are respectively provided with grooves to prevent the hook body from slipping off.

[0011] The movable jaw has a first hard round-headed nail on its side, and the fixed jaw has a second hard round-headed nail on its side. A spring is provided between the first hard round-headed nail and the second hard round-headed nail.

[0012] The lengths of the first and second hard round-headed nails are 15mm-30mm, the top diameters of the first and second hard round-headed nails are 1.8-2.2mm, and the adjustable range of the distance between the tops of the first and second hard round-headed nails is 10mm-50mm.

[0013] The length of the pipe fitting disassembly chain is 500mm-1000mm.

[0014] Each of the aforementioned unit sections has a length of 10-20 mm, a height of 4-8 mm, and a width of 4-8 mm.

[0015] The anti-slip layer is a rubber pad fixed to the inner side of the pipe fitting disassembly chain, or the anti-slip layer is an elastic rubber sleeve wrapped around the pipe fitting disassembly chain, or the anti-slip layer is a rubber layer wrapped around the outer surface of each unit section.

[0016] The thickness of the anti-slip layer is 1-2 mm.

[0017] The beneficial effects of this utility model are as follows: The pipe fitting disassembly chain is composed of several unit sections, enabling free bending within a plane. By hooking different unit sections with hook holes between them, the length of the pipe fitting disassembly chain can be adjusted to suit various irregular or damaged fastener shapes and pipe diameters requiring tightening or loosening, without being limited by the pipe diameter. It is highly adaptable and easy to use. The anti-slip layer on the pipe fitting contact surface of the disassembly chain not only increases friction to facilitate the unscrewing of old, rusted pipes and fasteners, but also effectively protects the pipes and fasteners from damage, especially for fasteners with easily damaged surfaces or made of precision materials.

[0018] The movable jaw and the fixed jaw are equipped with a first hard round-headed nail, a second hard round-headed nail, and a spring. For bolts that do not protrude from the surface, holes can be drilled in the bolt. The distance between the first hard round-headed nail and the second hard round-headed nail can be adjusted according to the hole spacing. The first hard round-headed nail and the second hard round-headed nail are inserted into the hole, and the spring tension can be used to firmly secure the round-headed nail in the hole. This type of bolt can be disassembled and assembled simply by turning a wrench. It is convenient and quick, and the bolt can be disassembled and assembled regardless of the bolt type. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram showing the positional relationship between the unit section and the side of the hinge component of this utility model.

[0021] Figure 3 This is a schematic diagram of the structure of the hook body of this utility model when it hooks the hook hole of the pipe fitting disassembly chain.

[0022] Figure 4 This utility model is an explosive structure consisting of one unit section and one hinge.

[0023] Figure 5 This is a schematic diagram of the connection structure between the unit section and the hinge of this utility model.

[0024] Figure 6 This is an exploded structure consisting of one unit section and one hinge member according to Embodiment 1 of this utility model.

[0025] Figure 7This is a schematic diagram of the connection structure between the unit section and the hinge in Embodiment 1 of this utility model.

[0026] The components include: 1. Handle; 2. Movable jaws; 3. Fixed jaws; 4. Opening adjustment nut; 5. Fixing pin; 6. Pipe disassembly chain; 7. Hook body; 8. Hinge; 9. Unit section; 10. Hook hole; 11. First inner plate; 12. Second inner plate; 13. First pin cylinder; 14. Second pin cylinder; 15. First outer plate; 16. Second outer plate; 17. First pin shaft; 18. Second pin shaft; 19. First hard round-headed nail; 20. Second hard round-headed nail; 21. Spring; 22. Anti-slip layer; 23. Groove. Detailed Implementation

[0027] according to Figure 1-7 This utility model relates to an adjustable wrench, comprising a pliers head and a handle 1. The pliers head includes a movable jaw 2, a fixed jaw 3, an opening adjustment nut 4, and a fixing pin 5. One side of the tail of the handle 1 is provided with a pipe removal chain 6 that can freely bend in a plane. The pipe removal chain 6 is hinged to the tail of the handle 1; preferably, the pipe removal chain 6 is detachably connected to the tail of the handle 1 by bolts. The other side of the tail of the handle 1 is provided with a hook 7 capable of hooking the pipe removal chain 6. The pipe removal chain 6 includes several unit sections 9 connected by hinges 8. Each unit section 9 and / or between every two adjacent unit sections 8 is provided with a hook hole 10 that mates with the hook body 7. The inner surface of the pipe removal chain 6 is the pipe contact surface, and the hook hole 10 is located on the outer surface of the pipe removal chain 6.

[0028] Preferably, the unit section 9 of the pipe fitting disassembly chain 6 includes a first inner plate 11 and a second inner plate 12 arranged in parallel with each other. One end of the first inner plate 11 is connected to one end of the second inner plate 12 by a first pin 13, and the other end of the first inner plate 11 is connected to the other end of the second inner plate 12 by a second pin 14.

[0029] The hinge 8 includes a first outer plate 15, a second outer plate 16, a first pin 17, and a second pin 18. One end of the first pin 17 is fixed to one end of the first outer plate 15, and the other end of the first pin 17 passes sequentially through one end of the first inner plate 11, the first pin cylinder 13, and the second inner plate 12 of one unit section before being fixed to one end of the second outer plate 16. One end of the second pin 18 is fixed to the other end of the first outer plate 15, and the other end of the second pin 18 passes sequentially through the other end of the first inner plate 11, the second pin cylinder 14, and the second inner plate 12 of another unit section before being fixed to the other end of the second outer plate 16. The hook hole 10 is formed between the first pin cylinder 13 and the second pin cylinder 14.

[0030] The movable jaw 2 has a first hard round-headed nail 19 detachably connected to its side, and the fixed jaw 3 has a second hard round-headed nail 20 detachably connected to its side. A spring 21 is provided between the first hard round-headed nail 19 and the second hard round-headed nail 20. Preferably, the first hard round-headed nail 19 and the second hard round-headed nail 20 are connected to the movable jaw 2 and the fixed jaw 3 respectively through threaded holes.

[0031] The lengths of the first hardened round-headed nail 19 and the second hardened round-headed nail 20 are 15mm-30mm respectively, and the tip diameters of the first hardened round-headed nail 19 and the second hardened round-headed nail 20 are 1.8-2.2mm respectively. The distance between the tips of the first hardened round-headed nail 19 and the second hardened round-headed nail 20 is adjustable from 10mm to 50mm. The distance between the movable jaw 2 and the fixed jaw 3 is adjusted by the opening adjusting nut 4, thereby adjusting the distance between the tips of the first hardened round-headed nail 19 and the second hardened round-headed nail 20 to accommodate bolts of different sizes. When the first hardened round-headed nail 19, the second hardened round-headed nail 20 and the spring 21 are removed, the pliers can be used as a regular wrench, enabling applications in multiple scenarios.

[0032] The length of the pipe fitting disassembly chain 6 is 500mm-1000mm. Each unit section 9 has a length of 10-20mm, a height of 4-8mm, and a width of 4-8mm.

[0033] The pipe fitting contact surface of the pipe fitting disassembly chain 6 is provided with an anti-slip layer 22. The anti-slip layer 22 is a rubber pad fixed to the inner side of the pipe fitting disassembly chain, or the anti-slip layer 22 is an elastic rubber sleeve wrapped around the pipe fitting disassembly chain, or the anti-slip layer 22 is a rubber layer wrapped around the outer surface of each unit section 9. The thickness of the anti-slip layer 22 is 1-2 mm.

[0034] Example 1: according to Figure 6 , Figure 7 Combination Figure 1-3 In this embodiment, based on the above, the first pin cylinder 13 and the second pin cylinder 14 are respectively provided with grooves 23 to prevent the hook body 7 from slipping off. The anti-slip layer 22 is a rubber layer wrapped around the outer surface of each unit section 9. Preferably, the outer surfaces of the first outer side plate 15 and the second outer side plate 16 are also provided with anti-slip layers 22. The remaining structure is as described above.

Claims

1. An adjustable wrench comprising a jaw and a handle, the jaw comprising a movable jaw, a fixed jaw, an opening adjustment nut and a fixed pin, characterized in that: The handle has a pipe disassembly chain on one side of its tail that can be freely bent in a plane, and a hook body on the other side of its tail that can hook the pipe disassembly chain. The pipe disassembly chain includes several unit sections connected by hinges. Each unit section and / or between every two adjacent unit sections has a hook hole that mates with the hook body. The inner surface of the pipe disassembly chain is the pipe contact surface, and the hook hole is located on the outer surface of the pipe disassembly chain.

2. An adjustable wrench according to claim 1, wherein: The pipe fitting contact surface of the pipe fitting disassembly chain is provided with an anti-slip layer.

3. An adjustable wrench according to claim 1, wherein: The unit section of the pipe fitting disassembly chain includes a first inner plate and a second inner plate arranged in parallel with each other. One end of the first inner plate is connected to one end of the second inner plate by a first pin, and the other end of the first inner plate is connected to the other end of the second inner plate by a second pin. The hinge includes a first outer plate, a second outer plate, a first pin, and a second pin; one end of the first pin is fixed to one end of the first outer plate, and the other end of the first pin passes sequentially through one end of the first inner plate, a first pin cylinder, and one end of the second inner plate of one unit section before being fixed to one end of the second outer plate; one end of the second pin is fixed to the other end of the first outer plate, and the other end of the second pin passes sequentially through the other end of the first inner plate, a second pin cylinder, and the other end of the second inner plate of another unit section before being fixed to the other end of the second outer plate; The hook hole is formed between the first pin and the second pin.

4. An adjustable spanner according to claim 3 wherein: The first pin cylinder and the second pin cylinder are respectively provided with grooves to prevent the hook body from slipping off.

5. An adjustable wrench according to claim 1, wherein: The movable jaw has a first hard round-headed nail on its side, and the fixed jaw has a second hard round-headed nail on its side. A spring is provided between the first hard round-headed nail and the second hard round-headed nail.

6. An adjustable spanner according to claim 5 wherein: The lengths of the first and second hard round-headed nails are 15mm-30mm, the top diameters of the first and second hard round-headed nails are 1.8-2.2mm, and the adjustable range of the distance between the tops of the first and second hard round-headed nails is 10mm-50mm.

7. An adjustable wrench according to claim 1, wherein: The length of the pipe fitting disassembly chain is 500mm-1000mm.

8. An adjustable wrench according to claim 1, wherein: Each of the aforementioned unit sections has a length of 10-20 mm, a height of 4-8 mm, and a width of 4-8 mm.

9. An adjustable wrench according to claim 2 wherein: The anti-slip layer is a rubber pad fixed to the inner side of the pipe fitting disassembly chain, or the anti-slip layer is an elastic rubber sleeve wrapped around the pipe fitting disassembly chain, or the anti-slip layer is a rubber layer wrapped around the outer surface of each unit section.

10. An adjustable spanner according to claim 2 or 9 wherein: The thickness of the anti-slip layer is 1-2 mm.

Images