Demolition pliers

Abstract

The invention provides forcible entry pliers.The forcible entry pliers comprise an upper plier handle and a lower plier handle which are connected together in a pivot mode through a rotation shaft, the same side of the upper plier handle and the same side of the lower plier handle are provided with an upper tooth body and a lower tooth body respectively, the upper tooth body and the lower tooth body can be meshed with each other due to rotation of the upper plier handle and the lower plier handle and are each provided with a tooth tip, and cutting edges formed by the tooth tips and the upper tooth body and the lower tooth body are in an S shape in the length direction of the cutting edges.According to the forcible entry pliers, when the upper tooth body and the lower tooth body are meshed with each other, stress concentration is formed at the contact positions of an object to be forcibly entered and the upper tooth tip and the lower tooth tip, when the stress strength exceeds the ultimate strength of the object to be forcibly entered, the object to be forcibly entered is firstly broken to form a forcible entry breach, therefore, the cutting difficulty is lowered, and the good forcible entry effect is achieved; meanwhile, the contact area of the cutting edges and the object is increased in the limited geometric space through the S-shaped cutting edges, the load borne by the cutting edges is decreased, and the damage probability of the cutting edges is decreased.

Description

technical field [0001] The invention relates to the technical field of cutting, in particular to a rescue pliers. Background technique [0002] At present, the fire-fighting special hydraulic rescue pliers have good rescue and cutting ability, but the structure is complex and the overall weight of the pliers is large, and it is inconvenient for a single person to operate, which is not conducive to popularization and is expensive. And the hydraulic rescue pliers in the prior art are generally straight-line shearing blades, the structure of the above-mentioned rescue pliers is relatively simple, and there are the following disadvantages in use: (1) a larger force must be applied when in use It is relatively laborious to form a cut-off; (2) the cutting edge is easy to passivate after a period of use, which further increases the difficulty of demolition. Contents of the invention [0003] In view of this, the present invention aims to provide a rescue pliers to improve the re...

AI Technical Summary

Problems solved by technology

[0002] At present, the fire-fighting special hydraulic rescue pliers have good demolition and cutting capabilities, but the structure is complex and the overall weight of the pliers is large, and it is inconvenient for a single person to operate, which is not conducive to popularization and is expensive.

And the hydraulic rescue pliers in the prior art are generally straight-line shearing blades, the structure of the above-mentioned rescue pliers is relatively simple, and there are the following disadvantages in use: (1) a larger active force must be applied when in use It is more laborious to form a cut; (2) the cutting edge is easy to passivate after a period of use, which further increases the difficulty of demolition

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