Multipurpose pawl pipe wrench

Abstract

The invention relates to a multipurpose pawl pipe wrench, which comprises a handle body, an upper jaw clamp, a pin shaft, a torsion spring, an arc tooth surface embedded block and an upper tooth surface embedded block, wherein the upper jaw clamp is hinged to the handle body through the pin shaft; an assembly groove is formed in the handle body; the torsion spring is arranged in the assembly groove; a driving end of the torsion spring is arranged on the upper jaw clamp; the other end is arranged at the bottom of the assembly groove; the arc tooth surface embedded block comprises an arc tooth surface and a lower tenon; a lower mortise is formed in the head part of the handle body; the arc tooth surface embedded block is fixed on the handle body through the matching of the lower tenon and the lower mortise; the upper tooth surface embedded block comprises an upper tooth surface and an upper tenon; an upper mortise is formed in the upper jaw clamp; and the upper tooth surface embedded block is fixed on the upper jaw clamp through the matching of the upper mortise and the upper tenon. Anti-slip teeth on the handle body and the upper jaw clamp can be assembled, dissembled and replaced, a whole jaw clamps a pipe by three tooth surfaces in different directions, the pipe is prevented from sliding, the structure of the upper jaw clamp is reasonable, the weight is light, the strength is good, the performance of the multipurpose pawl pipe wrench is good, the manufacture cost is low, the service life is long, and functions are wide.

Description

technical field [0001] The invention relates to a pipe wrench, in particular to a multi-purpose ratchet pipe wrench. Background technique [0002] The ratchet wrench is generally used to tighten or loosen various nuts, bolts, threaded water pipes or other special-shaped workpieces. The Chinese Patent Publication No. "CN1353032A" discloses a Wrench, the wrench is composed of a handle, a hook-shaped wrench and a spring fixing structure. Fix the rear part of the hook-shaped wrench in the strip-shaped notch; the spring fixing structure is mainly composed of two parts: the spring and the spring fixing pin: the spring fixing pin crosses the strip-shaped notch and becomes a fixed fulcrum on which one end of the spring is wound. , the other end of the spring fully penetrates the insertion bar hole of the hook-shaped wrench to form another fulcrum, and the abdomen, back and semicircular head of the wrench have anti-slip teeth. [0003] But this ratchet wrench exposes many shortcomi...

AI Technical Summary

Problems solved by technology

[0005] 1) For the user, the part with anti-slip teeth on the ventral side of the wrench head is an inseparable whole from the head of the wrench. If it is used for a long time, the anti-slip teeth will gradually wear out and eventually lose the anti-slip function, and the wrench will have to be a whole At this time, most of the positions of the wrench are normally available, and only the anti-skid teeth are damaged. Therefore, this structural defect leads to a small loss, shortens the service life of the wrench, and causes great waste.

[0006] 2) For producers, if they want to improve the mechanical performance of the wrench during production and manufacturing, they need to use high-quality materials, and the integrated design makes it possible to use uniform materials to manufacture the pipe wrench, except for the wrench. Anti-slip teeth require high-quality materials, and other parts can meet the requirements with general materials, so the material cost of the integrated ratchet wrench is greatly increased

[0007] 2. This kind of wrench only relies on two tooth surfaces to clamp the workpiece when working. If the shape angle of the workpiece is the same as the angle of the wrench jaw, this kind of wrench can achieve the purpose well, but if the angle is different, such as pipes, etc. , it is very unreliable to use this kind of wrench to clamp

[0008] 3. The reset force after the hook-shaped wrench of this wrench is opened is realized by a torsion spring. The two arms of the torsion spring are staggered and are not on the same plane. At the same time, the hook-shaped wrench is not strong when it is reset, so that it scratches the side wall of the assembly groove when it is reset. In the actual use process, it has been stuck and not reset.

[0010] 5. The front cross-section of the hook-shaped wrench of the wrench is rectangular. In large-scale wrenches, the hook-shaped wrench is bulky and difficult to reset.

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