Oil pipe wrench structure

Abstract

An oil pipe wrench structure includes a lower claw, an upper claw, a pivot, and a spring. The lower claw includes a wrench section and a lower jaw section connected to the wrench section. The lower jaw section has a slot and an outer pivot hole connected to the slot. The lower jaw section is formed with a lower jaw arc surface located on the top of the slot and a plurality of inclined arc surfaces located on both sides of the slot. The upper claw includes a hinge section and an upper jaw section connected to the hinge section. The hinge includes a cam block and a stop plate. An opening, an upper jaw arc surface, multiple engaging teeth, a stop surface, and a clearance space are defined on the periphery of the opening of the upper jaw section. The hinge section is inserted in the slot to make the upper jaw arc surface orient toward the lower jaw arc surface. The pivot is inserted in the outer pivot hole and the hinge section. The spring is placed in the slot and elastically connected to the stop plate.

Description

[Technical Field]

[0001] This case relates to a wrench, particularly a hydraulic pipe wrench structure. [Previous Technology]

[0002] A pipe wrench is a tool used for installing and removing pipe fittings. The main body of the wrench has an open clamping jaw. The two sides of the clamping jaw are used to clamp the nut and serve as two clamping parts for applying force. The two clamping parts form a clamping and fixing on the six sides of the nut by clamping the three sides of the clamping surfaces. By rotating the wrench, the two clamping parts are controlled to rotate the nut, thereby achieving the locking and unlocking of the nut according to the direction of rotation.

[0003] Existing hose wrenches typically require a sufficient rotation angle of the handle to achieve effective torque output during operation. However, when operating in confined spaces, such as near walls, machinery, or other obstacles, the rotation angle of the handle is severely limited. This prevents continuous rotation and forces the user to frequently release the wrench, readjust the angle, and then continue applying force, resulting in low work efficiency and operational instability.

[0004] In view of this, in order to achieve the above-mentioned objectives, the applicant has devoted himself to research and applied the theory, and finally proposed a design that is reasonable and effectively improves the above-mentioned deficiencies. [Summary of the Invention]

[0005] One of the purposes of this application is to provide a hydraulic wrench structure to improve work efficiency and operational stability, and increase ease of use.

[0006] To achieve the above objectives, this invention relates to a hydraulic pipe wrench structure, comprising a lower jaw, an upper jaw, a pivot, and a spring. The lower jaw includes a wrench mechanism and a lower jaw section connecting to the wrench mechanism. The lower jaw section has a slot and an outer pivot hole connecting to the slot. The lower jaw section has a lower clamping arc surface formed on the top surface of the slot and a plurality of oblique arc surfaces located on both sides of the slot. The upper jaw includes a pivot section and an upper jaw section connecting to the pivot section. The pivot section includes a cam block and a stop plate. The upper jaw section has an opening and an upper clamping arc surface located around the opening, a plurality of locking teeth, a stop surface, and a clearance space. The pivot section is inserted into the slot, so that the upper clamping arc surface faces the lower clamping arc surface. The pivot passes through the outer pivot hole and the pivot section. The spring is placed in the slot and elastically abuts against the stop plate.

[0007] In one embodiment of this case, the lower jaw segment further includes a top inclined surface that connects the lower jaw arc surface and each inclined arc surface, and the top inclined surface is inclined at an angle to the horizontal plane.

[0008] In one embodiment of this case, the lower clamping surface has a first guide angle, and each inner arc surface has a second guide angle, the angle of the second guide angle being greater than that of the first guide angle.

[0009] In one embodiment of this case, the pivot section is provided with an inner pivot hole, and the pivot is inserted in the inner pivot hole.

[0010] In one embodiment of this case, the lower jaw segment is provided with a groove on the inner wall surface of the slot, and one end of the spring abuts against the groove.

[0011] In one embodiment of this case, the slot extends from the top of the lower jaw segment to the bottom side of the groove.

[0012] In one embodiment of this case, the pivot section has an exposed slotted pressure flap.

[0013] In one embodiment of this case, the outer side of the upper jaw segment is an arc surface that extends to the pressure wing.

[0014] In one embodiment of this case, the cam block has a flat abutting surface and a lower convex surface connecting the flat abutting surface. When the upper claw pivots relative to the lower claw and the lower convex surface pushes against the inner wall of the slot, it will increase the clearance space.

[0015] In one embodiment of this case, the locking tooth has a locking angle, and the upper claw has a relief angle formed on one side of the pivot section. The angle of the relief angle is different from that of the locking angle.

[0016] Compared to conventional methods, the hydraulic wrench structure of this invention causes the upper jaw section to move outward when the pressure blade of the upper jaw is pressed, thereby widening the opening of the upper jaw section. This facilitates placing the workpiece between the upper jaw section and the lower jaw section, where it is clamped by the upper jaw arc surface, the lower jaw arc surface, and the locking teeth. This clamps the nut between the lower jaw and the upper jaw, thereby achieving the purpose of rotating the workpiece. In addition, when the hydraulic wrench structure of this invention rotates in the other direction, the workpiece will spin freely in the opening of the upper jaw section 22, allowing the force application handle to return to its original position to maintain a sufficient rotation angle, thereby increasing the convenience and practicality of use.

Implementation Method

[0017] The detailed description and technical content of this case are explained below with reference to the accompanying drawings. However, the accompanying drawings are provided for reference and explanation only and are not intended to limit this case.

[0018] Please refer to Figures 1 to 3, which are three-dimensional exploded view, appearance view, and usage plan view of the hose wrench structure of this invention. The hose wrench structure 1 of this invention includes a lower jaw 10, an upper jaw 20, a pivot 30, and a spring 40. The upper jaw 20 is pivotally connected to the lower jaw 10 through the pivot 30 and can pivot relative to it. The spring 40 is disposed on the lower jaw 10 and elastically abuts against the upper jaw 20, providing the upper jaw 20 with an elastic restoring force to return to its original position. The structure of the hose wrench structure 1 is described in more detail below.

[0019] The lower jaw 10 includes a lever 11 and a lower jaw segment 12 connected to the lever 11. The lower jaw segment 12 has a slot 13 and an external pivot hole 14 communicating with the slot 13. The lower jaw segment 12 has a lower clamping arc surface 15, a plurality of inclined arc surfaces 16 located on both sides of the slot 13, and a top inclined surface 17 connecting the lower clamping arc surface 15 and each inclined arc surface 16 formed on the top surface of the slot 13. In this embodiment, the lower clamping arc surface 15 has a first guide angle r. Furthermore, each inclined arc surface 16 has a second guide angle R. The angle of the second guide angle R is greater than the first guide angle r.

[0020] The upper jaw 20 includes a pivot section 21 and an upper jaw section 22 connecting the pivot section 21. The pivot section 21 includes a cam block 23 and a stop plate 24. The upper jaw section 22 is formed with an opening 220 and an upper jaw arc surface 221, a plurality of locking teeth 222, a stop surface 223, and a clearance space 224 located around the opening 220. Furthermore, the pivot section 21 is inserted into the slot 13, so that the upper jaw arc surface 221 faces the lower jaw arc surface 15.

[0021] Specifically, the cam block 23 has a flat abutment surface 231 and a lower convex surface 232 connecting the flat abutment surface 231. Furthermore, when the upper claw 20 pivots relative to the lower claw 10 and the lower convex surface 232 pushes against the inner wall of the slot 13, the clearance space 224 will be increased.

[0022] In one embodiment of this invention, the pivot section 21 has a pressure flap 25 that protrudes from the slot 13. Furthermore, the outer side of the upper jaw section 22 is an arc surface that extends to the pressure flap 25.

[0023] The pivot 30 passes through the outer pivot hole 14 and the pivot section 21. In this embodiment, the pivot section 21 is provided with an inner pivot hole 210. The pivot 30 passes through the inner pivot hole 210. The upper claw 20 pivots by engaging the lower claw 10 through the pivot 30.

[0024] Furthermore, the spring 40 is disposed in the slot 13 and elastically abuts against the stop plate 24. Also, the lower jaw segment 12 has a groove 120 provided on the inner wall surface of the slot 13. One end of the spring 40 abuts against the groove 120, and the other end abuts against the pivot segment 21, to provide the restoring force required for the upper jaw 20 to return to its original position. In this embodiment, the slot 13 is a half-slot and extends from the top of the lower jaw segment 12 to the bottom side of the groove 120.

[0025] It should be noted that the use of the oil pipe wrench structure 1 can be further enhanced by attaching an extension (not shown) to the wrench handle 11 of the lower jaw 10, thereby increasing the torque. An external force is applied to the pressure plate 25 of the upper jaw 20, causing the upper jaw section 22 to move outward, thereby widening the opening 220 of the upper jaw section 22. In addition, after the external force is removed, the upper jaw section 22 can be moved back to its original position by the restoring force of the spring 40, and the opening 220 is narrowed. Accordingly, a nut 2 of the oil pipe is clamped in the opening 220, so that the nut 2 is clamped by the upper jaw arc surface 221, the lower jaw arc surface 15 and the clamping teeth 222, thereby clamping the nut 2 between the lower jaw 10 and the upper jaw 20, thereby rotating the nut 2. It is worth noting that the top inclined surface 17 of the lower jaw 10 in this case forms an angle A with the horizontal plane. In this embodiment, the tilt angle A is an acute angle. The tilt angle A is set to facilitate the rotation of the nut 2 on the lower claw 10.

[0026] Please also refer to Figure 4, which is a plan view of the hydraulic wrench structure of this case rotating freely relative to the nut. After the hydraulic wrench structure 1 of this case rotates to a certain angle, the locking position of the nut 2 needs to be adjusted again so that the force application handle has a sufficient rotation angle to complete the effective torque output. At this time, the hydraulic wrench structure 1 needs to be rotated in the other direction. The nut 2 will rotate freely in the opening 220 of the upper jaw section 22, so that the force application handle returns to its original position to maintain a sufficient rotation angle.

[0027] It should be noted that, in this case, the upper claw 20 has a clearance angle B formed on one side of the pivot section 21. In addition, each locking tooth 222 has a locking angle C. The angle setting of the clearance angle B is different from that of the locking angle C, thereby facilitating the switching of the rotation direction of the nut 2 in the opening 220.

[0028] Please refer to Figure 5 again, which is a schematic diagram of the pressure control of the oil pipe wrench structure of this case. When the oil pipe wrench structure 1 of this case is not in use, an external force is used to press the pressure wing 25 of the upper jaw 20, thereby causing the upper jaw section 22 to move outward, thereby expanding the opening 220 of the upper jaw section 22. At this time, the oil pipe wrench structure 1 can be detached from the nut 2.

[0029] Please also refer to Figures 6 and 7, which are perspective and plan views of another embodiment of the hose wrench structure of this case. This embodiment is substantially the same as the previous embodiment. The hose wrench structure 1 includes a lower jaw 10, an upper jaw 20, a pivot 30, and a spring 40. The lower jaw 10 includes a wrench handle 11 and a lower jaw section 12 connecting the wrench handle. The lower jaw section 12 has a slot 13 and is formed with a lower clamping arc surface 15 and a plurality of oblique arc surfaces 16. The upper jaw 20 includes a pivot section 21 and an upper jaw section 22. The pivot section 21 includes a cam block 23 and a stop plate 24. The upper jaw section 22 is formed with an opening 220, an upper clamping arc surface 221, a plurality of locking teeth 222, a stop surface 223, and a clearance space 224. The pivot section 21 pivotally connects to the lower jaw section 12, so that the upper clamping arc surface 221 faces the lower clamping arc surface 15. The spring 40 elastically abuts against the stop plate 24.

[0030] Similarly, in this embodiment, the upper claw 20 has a clearance angle D formed on one side of the pivot section 21. In addition, each locking tooth 222 has a locking angle E. The angle setting of the clearance angle D is different from that of the locking angle E, thereby facilitating the switching of the rotation direction of the nut 2 in the opening 220.

[0031] The difference in this embodiment lies in the number of locking teeth 222 formed in the upper jaw segment 22. In practice, the number of these locking teeth 222 only needs to be sufficient for the working parts.

[0032] The above description is only a preferred embodiment of this case and is not intended to limit the scope of the patent in this case. Other equivalent changes that utilize the spirit of the patent in this case should all fall within the scope of the patent in this case. [Simplified Explanation of the Diagram]

[0033] Figure 1 is a three-dimensional exploded view of the structure of the oil pipe wrench in this case.

[0034] Figure 2 is a three-dimensional exploded view of the structure of the oil pipe wrench in this case.

[0035] Figure 3 is a schematic diagram of the use of the oil pipe wrench structure in this case.

[0036] Figure 4 is a plan view of the structure of the oil pipe wrench in this case, which rotates freely relative to the nut.

[0037] Figure 5 is a schematic diagram of the pressure lever of the oil pipe wrench structure in this case.

[0038] Figure 6 is a three-dimensional exploded view of another embodiment of the oil pipe wrench structure of this case.

[0039] Figure 7 is a plan view of another embodiment of the oil pipe wrench structure of this case.

Claims

1. A hose reel wrench structure, comprising: a lower jaw, including a wrench means and a lower jaw segment connected to the wrench means, the lower jaw segment having a slot and an outer pivot hole communicating with the slot, the lower jaw segment having a lower clamping arc surface formed on the top surface of the slot and a plurality of oblique arc surfaces located on both sides of the slot; an upper jaw, including a pivot section and an upper jaw segment connected to the pivot section, the pivot section including a cam block and a stop plate, the upper jaw segment having an opening and an upper clamping arc surface located around the opening, a plurality of locking teeth, a stop surface and a clearance space, the pivot section being inserted into the slot such that the upper clamping arc surface faces the lower clamping arc surface; a pivot passing through the outer pivot hole and the pivot section; and a spring disposed in the slot and elastically abutting the stop plate.

2. The oil pipe wrench structure as described in claim 1, wherein the lower jaw segment further includes a top inclined surface connecting the lower clamp arc surface and each inclined arc surface, the top inclined surface forming an angle with the horizontal plane.

3. The oil pipe wrench structure as described in claim 1, wherein the lower clamp arc surface has a first guide angle, and each oblique arc surface has a second guide angle, the angle of the second guide angle being greater than the first guide angle.

4. The hose wrench structure as described in claim 1, wherein the pivot section is provided with an inner pivot hole, and the pivot is disposed in the inner pivot hole.

5. The oil pipe wrench structure as described in claim 1, wherein the lower jaw section is provided with a groove on the inner wall surface of the slot, and one end of the spring abuts against the groove.

6. The hose wrench structure as described in claim 5, wherein the slot extends from the top of the lower jaw section to the bottom side of the groove.

7. The hose wrench structure as described in claim 1, wherein the pivot section has a pressure flap protruding from the slot.

8. The tubing wrench structure as described in claim 7, wherein the outer side of the upper jaw section is an arc surface that extends to the pressure vane.

9. The hose wrench structure as described in claim 1, wherein the cam block has a flat abutment surface and a lower convex surface connecting the flat abutment surface, the upper jaw pivots relative to the lower jaw and the lower convex surface increases the clearance space when it pushes against the inner wall of the slot.

10. The hose wrench structure as described in claim 1, wherein each locking tooth has a locking angle, and the upper claw has a clearance angle formed on one side of the pivot section, the angle of the clearance angle being different from the locking angle.

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