Portable light weight pipe wrench

Abstract

This utility model relates to the field of manual hardware tools, specifically a portable lightweight pipe wrench. The utility model includes: an upper clamp body with upper engagement teeth at its head for clamping pipe fittings, a groove at its lower part containing a spring hole, and a pin hole on the side wall of the groove; a handle whose head is fitted to the groove at the lower part of the upper clamp body and is rotatably connected via a pin; a spring fitted into the spring hole; a lower clamp body with a channel for the handle to pass through, an adjusting nut installed in the channel, and the adjusting nut fitted onto the handle; and a lower jaw fixed to the head of the lower clamp body, with lower engagement teeth at its upper part that cooperate with the upper engagement teeth. This utility model, through the pin-rotatable connection between the upper clamp body and the handle, combined with a spring linkage structure, achieves rapid switching between pressing down to loosen the clamp and releasing the workpiece, eliminating the need for repeated workpiece removal and adjustment, significantly improving work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of manual hardware tools, specifically a portable lightweight pipe wrench. Background Technology

[0002] Pipe wrenches are commonly used tools for rotating or fixing round or cylindrical components and workpieces, and are widely used in pipe installation and disassembly operations. Most existing pipe wrenches consist of a fixed handle and a movable jaw.

[0003] Traditional pipe wrenches only allow basic rotation between the upper body and the handle, lacking a linkage auxiliary structure. This means that when clamping different sizes of pipe fittings, the wrench needs to repeatedly release the workpiece to adjust the opening. It is also difficult to quickly switch operating positions during the tightening process, increasing the complexity of operation and reducing work efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a portable, lightweight pipe wrench to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solutions: A portable lightweight pipe wrench, comprising: The upper clamp body is inverted L-shaped. Its head is provided with upper biting teeth for clamping pipe fittings, and a groove is provided at the bottom. The groove has a spring hole inside and a pin hole on the side wall of the groove. The pliers handle has a head that fits into the groove at the bottom of the upper pliers body, and a pin passes through the pin hole and the corresponding hole at the head of the pliers handle to enable the upper pliers body to rotate with the pliers handle. Adjustment teeth are provided on both sides of the middle part of the pliers handle. The spring is assembled in the spring hole, and the spring is in a compressed state, with the bottom end of the spring in contact with the head of the pliers handle. The lower clamp body has a channel for the clamp handle to pass through, and an adjusting nut is installed in the channel. The adjusting nut is sleeved on the clamp handle, and the internal teeth of the adjusting nut cooperate with the adjusting teeth on the clamp handle. And a lower jaw, fixed to the head of the lower jaw body, the upper part of the lower jaw is provided with a lower biting tooth position for use in conjunction with the upper biting tooth position.

[0006] Furthermore, the bottom surface of the lower groove of the upper clamp body is an angled surface, and the angled surface has an angle with the top surface of the clamp handle head; In the initial state, the beveled surface of the pipe wrench is in contact with the top surface of the handle head near the lower jaw.

[0007] Furthermore, the lower clamp body is L-shaped, and the channel through which the clamp handle passes is a rectangular through groove, wherein a rectangular through hole for installing an adjusting nut is provided in the rectangular through groove. The lower jaw has a slotted head and a pin hole. The lower jaw is fixedly installed on the head of the lower jaw by a pin passing through the pin hole and corresponding to the lower round hole.

[0008] Furthermore, the head of the lower clamp is a bevel, which causes the opening of the pipe clamp to gradually decrease inward.

[0009] Furthermore, the lower half of the pliers handle is fitted with a plastic grip sleeve.

[0010] The beneficial effects of this utility model are: 1. This utility model achieves rapid switching between pressing down to loosen the workpiece and releasing the clamp through a spring linkage structure via a pin-shaft connection between the upper clamp body and the clamp handle, eliminating the need for repeated workpiece removal and adjustment, thus significantly improving work efficiency.

[0011] 2. The lower jaws are detachable and replaceable, so there is no need to replace the entire lower jaw body after wear; the various parts are connected by pins and other means, making it convenient to replace parts during later maintenance and extending the overall service life of the tool. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a three-dimensional schematic diagram of the lower clamp body in this utility model; The reference numerals in the attached figures are as follows: 1. Upper jaw; 2. Lower jaw; 3. Lower jaw; 4. Pin; 5. Pin hole; 6. Spring; 7. Spring hole; 8. Angled surface; 9. Pin shaft; 10. Pin shaft hole; 11. Handle; 12. Adjusting nut; 13. Rectangular through hole; 14. Rectangular through slot; 15. Adjusting tooth position; 16. Plastic handle cover. Detailed Implementation

[0013] 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.

[0014] Example 1: Please see Figure 1 and Figure 2 In this embodiment of the utility model, a portable lightweight pipe wrench includes: The upper clamp body 1 is in the shape of an inverted L. Its head is provided with upper biting teeth for clamping pipe fittings. The lower part is provided with a groove, the inside of which is provided with a spring hole 7, and the side wall of the groove is provided with a pin hole 10. The head of the pliers 11 is adapted to the groove at the lower part of the upper pliers 1, and a pin 9 passes through the pin hole 10 and the corresponding hole at the head of the pliers 11 to enable the upper pliers 1 and the pliers 11 to rotate. Adjustment teeth 15 are provided on both sides of the middle part of the pliers 11. Spring 6 is assembled in spring hole 7. Spring 6 is in a compressed state. The bottom end of spring 6 is in contact with the head of pliers 11. The lower clamp body 3 has a channel through which the clamp handle 11 passes. An adjusting nut 12 is installed in the channel. The adjusting nut 12 is sleeved on the clamp handle 11, and the internal teeth of the adjusting nut 12 are engaged with the adjusting teeth 15 on the clamp handle 11. And the lower jaw 2, which is fixed to the head of the lower jaw body 3, and the upper part of the lower jaw 2 is provided with a lower biting tooth position for use in conjunction with the upper biting tooth position.

[0015] In use, first place the pipe fitting in the opening between the upper engagement teeth of the upper clamp body 1 and the lower engagement teeth of the lower clamp jaw 2, then press down on the clamp handle 11. The upper clamp body 1 rotates around the pin 9, and the lower groove of the upper clamp body 1 compresses the spring 6, further compressing the spring 6 and slightly widening the pipe clamp opening. Then rotate the adjusting nut 12. Because the teeth inside the adjusting nut 12 match the adjusting teeth 15 in the middle of the clamp handle 11, the rotation of the adjusting nut 12 drives the lower clamp body 3 to move along the length of the clamp handle 11. Continue tightening the clamp until the lower jaw 2's lower biting teeth are tightly against the outer wall of the pipe fitting. Then, release the downward pressure on the clamp handle 11, and the compressed spring 6 releases its elasticity, pushing the upper clamp body 1 to rotate in the opposite direction. The upper biting teeth press down on the pipe fitting, thus achieving the clamping of the pipe fitting by the upper clamp body 1 and the lower jaw 2. If the position of the pipe clamp needs to be adjusted during the tightening process, simply press down the clamp handle 11 again to compress the spring 6, widen the opening to release the workpiece, and then release the clamp handle 11 after adjustment to re-clamp without completely disengaging the workpiece.

[0016] In this utility model, the upper clamp body 1 and the clamp handle 11 are rotatably connected by the pin 9. With the elastic force of the spring 6, a pressing and releasing mechanism is formed, which solves the problem that traditional pipe wrenches need to repeatedly remove the workpiece to adjust the opening, reduces the number of operation steps, and improves work efficiency.

[0017] The components are assembled and connected, simplifying the structure and reducing the overall weight, meeting the design requirements of portability and lightweight, making it easy to carry and work in confined spaces.

[0018] Example 2: Please see Figure 1Based on embodiment 1, the bottom surface of the lower groove of the upper clamp body 1 is an angled surface 8, and there is an angle between the angled surface 8 and the top surface of the head of the clamp handle 11. In the initial state, the beveled surface 8 is in contact with the top surface of the head of the handle 11 near the lower jaw 2.

[0019] By setting the beveled surface 8, the upper clamp body 1 can be rotated upward at a certain angle, enabling the pipe wrench to achieve clamping and ratchet functions.

[0020] Example 3: Please see Figure 1 and Figure 2 Based on embodiment 1, the lower clamp body 3 is L-shaped, and the channel through which the clamp handle 11 passes is a rectangular through groove 14. A rectangular through hole 13 for installing the adjusting nut 12 is provided in the rectangular through groove 14. The lower jaw 3 has a slotted head and a pin hole 5. The lower jaw 2 is fixedly installed on the head of the lower jaw 3 by a pin 4 passing through the pin hole 5 and corresponding to the lower round hole.

[0021] During installation, insert the lower jaw 2 into the head groove of the lower jaw body 3 and insert the pin 4 to fix it. If the teeth of the lower jaw 2 are worn, the pin 4 can be removed to replace the lower jaw 2, without replacing the entire lower jaw body 3.

[0022] Example 4: Please see Figure 1 Based on Example 3, the head of the lower clamp body 3 is a bevel, which causes the opening of the pipe clamp to gradually decrease inward.

[0023] When the pipe is placed into the opening, the bevel can guide the pipe, guiding it to quickly slide into the corresponding clamping areas of the upper and lower meshing teeth. During the clamping process, the contact between the bevel and the outer wall of the pipe can increase the contact area. Together with the upper and lower meshing teeth, it can further improve the clamping stability and prevent the pipe from sliding radially when screwing.

[0024] Example 5: Please see Figure 1 Based on Example 1, the lower half of the pliers 11 is fitted with a plastic handle sleeve 16.

[0025] When the operator holds the pliers handle 11, the plastic grip 16 can increase the friction between the hand and the pliers handle 11, preventing slippage due to sweaty hands or excessive force; at the same time, the plastic material has a certain elasticity, which can buffer the reaction force generated when screwing the fittings and reduce hard contact between the hand and the pliers handle 11.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A portable lightweight pipe wrench, characterized in that, include: The upper clamp body (1) is inverted L-shaped. Its head is provided with upper biting teeth for clamping pipe fittings, and a groove is provided at the bottom. The groove is provided with a spring hole (7) inside and a pin hole (10) on the side wall of the groove. The head of the pliers (11) is adapted to the groove at the lower part of the upper pliers (1), and a pin (9) passes through the pin hole (10) and the corresponding hole at the head of the pliers (11) to enable the upper pliers (1) to rotate and connect with the pliers (11). Adjustment teeth (15) are provided on both sides of the middle part of the pliers (11). Spring (6) is assembled in spring hole (7). Spring (6) is in a compressed state. The bottom end of spring (6) is in contact with the head of pliers (11). The lower clamp body (3) is provided with a channel for the clamp handle (11) to pass through. An adjusting nut (12) is installed in the channel. The adjusting nut (12) is sleeved on the clamp handle (11), and the internal teeth of the adjusting nut (12) are matched with the adjusting teeth (15) on the clamp handle (11). And the lower jaw (2) is fixed to the head of the lower jaw body (3), and the upper part of the lower jaw (2) is provided with a lower biting tooth position that cooperates with the upper biting tooth position.

2. The portable lightweight pipe wrench according to claim 1, characterized in that, The bottom surface of the lower groove of the upper clamp body (1) is an angled surface (8), and the angled surface (8) has an angle with the top surface of the head of the clamp handle (11); In the initial state, the beveled surface (8) near the lower jaw (2) of the pipe wrench is in contact with the top surface of the head of the handle (11).

3. The portable lightweight pipe wrench according to claim 1, characterized in that, The lower clamp body (3) is L-shaped, and the channel through which the clamp handle (11) passes is a rectangular through groove (14). The rectangular through groove (14) is provided with a rectangular through hole (13) for installing the adjusting nut (12). The lower jaw (3) has a slotted head and a pin hole (5). The lower jaw (2) is fixedly installed on the head of the lower jaw (3) by a pin (4) passing through the pin hole (5) and the corresponding round hole at the bottom of the lower jaw (2).

4. A portable lightweight pipe wrench according to claim 3, characterized in that, The head of the lower clamp (3) has a beveled surface, which causes the opening of the pipe clamp to gradually decrease inward.

5. A portable lightweight pipe wrench according to claim 1, characterized in that, The lower half of the pliers (11) is fitted with a plastic handle sleeve (16).

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