Light opening spanner

Abstract

The invention provides a light opening spanner. The spanner comprises a metal clamping component and a support piece molded through injection, wherein the metal clamping component comprises a metal operation piece; the metal operation piece comprises a front side wall, a back side wall opposite to the front side wall, and an acting wall; an opening space is defined by the front side wall, the back side wall and the acting wall; at least one of the front side wall and the back side wall is provided with an immobilized through hole communicated to the opening space; at least one of the front side wall, the back side wall and the acting wall is provided with an engagement part on the side surface towards the opening space; and the support piece comprises a deep combination part at least fully filled in the opening space, matched with the engagement part and extending into the immobilized through hole, and a handle part integrally molded with the deep combination part. The structure, provided by the invention, largely reduces the weight of the opening spanner, and reduces the burden of operators; and a force application force is lengthened, and a resistance arm is shortened, so that the structure of a composite material interface part of the opening spanner is firmer.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to a lightweight open end wrench. Background technique [0002] In order to fix different objects to each other, a common part is a bolt or a screw, and the hand tool responsible for twisting the hexagonal bolt, screw or nut is mainly a wrench, which completes the operation of loosening parts by torque. In the past, in order to provide sufficient mechanical strength, such tools were generally made of metal materials such as stainless steel as a whole, and the weight often caused a considerable burden for operators who had to hang multiple wrenches of different sizes on their waists. [0003] Subsequently, in order to solve the above-mentioned problems, the applicant of the present invention specially designed an "ultra-lightweight composite wrench" made of two metal materials, steel and aluminum alloy. Compared with stainless steel, the weight is reduced by 40% to 50%. And i...

AI Technical Summary

Problems solved by technology

It also makes this kind of composite tools made of non-metallic and stainless steel and other metals still have doubts about stability and durability.

[0006] In particular, there will be no inter-metallic mutual dissolution between metal materials and non-metal materials. After experiencing climate effects such as thermal expansion and contraction, the combination of metal and non-metallic materials will gradually peel off, which will further damage the durability of the overall structure.

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