Accurate gripping tongs for the machine tool

Abstract

The invention relates to a precision vise used on a machine tool, the invention aims to solve the problems in the prior low speed moving vise where the operation is complicated and the working efficiency is low and in the prior high speed moving vise where the overspeed or overwearing and damage occur easily, the clamping accuracy is low and the service life is short; the invention adopts a novel structure of the double lateral locking and positioning, the technical proposal is that the invention consists of a vise base, a fixing vise jaw, a moving vise jaw and a quick moving mechanism, and is characterized in that a gear rack is arranged at the two sides of a vise base guiding rail, the quick moving mechanism consists of a nut base, a thrust screw rod and an expander, the expander consists of a pair of moving gear blocks, an expansion control rod and a reset spring, the outside of the moving gear blocks are respectively provided with a tooth row joggled with the tooth rack at the two sides of the vise base guiding rail, the expansion control rod matches with the moving gear block in driving manner, the expansion control rod matches with the nut base, the handholding end of which is arranged outside the nut base, the reset spring is connected with the two moving gear blocks, the thrust screw rod matches with the moving vise jaw, a flexible connection is adopted between the moving vise jaw and the quick moving mechanism.

Description

technical field [0001] The invention belongs to a working mechanism on a machine tool, and specifically refers to a precision flat-nose pliers used on a machine tool. Background technique [0002] On the mechanical processing machine tool that is generally used at present, vise (also claiming clamp) is the common working mechanism that is used for clamping workpiece. The structure of a general flat nose pliers is composed of a pliers base, a fixed jaw fixed on the pliers base, a movable jaw slidingly fitted on the pliers base, a screw rod rotatably fitted on the pliers base, and a nut installed on the movable jaws. Wherein the nut and the screw rod are threadedly matched. Since the adjustment of the opening of the jaws is realized by turning the screw rod to move the movable jaws at a slow speed, many turns of the screw rod must be rotated each time the opening of the jaws is adjusted, which is not only cumbersome to operate, but also has low work efficiency. People improv...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the operation troubles and low work efficiency of the existing vise with movable jaws moving at a slow speed, and the vise with fast moving jaws that are easy to be too fast or excessively worn and damaged, the clamping accuracy of the vise To reduce defects such as shortened service life of flat pliers, the purpose of this invention is to provide an improved precision flat pliers used on machine tools, which can overcome the defects of the prior art

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