CN103753418A

CN103753418A - Vise-grip pliers

Info

Publication number: CN103753418A
Application number: CN201210266901.6A
Authority: CN
Inventors: 黄春娟
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-07-31
Filing date: 2012-07-31
Publication date: 2014-04-30

Abstract

The invention belongs to machining tools, and particularly relates to clamping vise-grip pliers which comprise an upper pliers arm and a lower pliers arm. The head of the upper pliers arm is fixedly connected with an upper pliers nozzle, the head of the upper pliers arm positioned below the upper pliers nozzle is in hinge joint with a lower pliers nozzle, the other end of the lower pliers nozzle is in hinge joint with the lower pliers arm, the middle of the lower pliers arm is in hinge joint with a movable rod, the middle of the movable rod projects downwards, the other end of the movable rod is arranged in the upper pliers arm, a tension spring is arranged between the middle of the lower pliers nozzle and the middle of the inner side of the upper pliers arm, an adjusting bolt is arranged at the tail of the upper pliers arm and abutted to one end of the movable rod in the upper pliers arm, the tail of the lower pliers arm is in hinge joint with a pressing rod, one end of the pressing rod is arranged below a lower projection of the movable rod, a stopper is fixedly arranged in the rear of the hinge joint of the lower pliers nozzle in the upper pliers arm, and linear saw teeth are arranged on opposite portions of the upper pliers nozzle and the lower pliers nozzle respectively. The vise-grip pliers are large in clamping force and easy to operate.

Description

Locking pliers

Technical field

The invention belongs to a kind of machining tool, be specifically related to a kind of locking pliers of clamping.

Background technology

The common tool of processing for holding workpiece is at present that tiger's jaw pincers wait the pliers that uses a lever principle, when holding workpiece, owing to directly leaning on people's hand, have an effect, by a lever, be directly conducted to workpiece, cause clamping force less, easily make clamped workpiece get loose, operation effort and clamping effect are bad.

Summary of the invention

The object of the invention is: provide a kind of clamping force greatly and operate locking pliers easily.

The object of the present invention is achieved like this: locking pliers, comprise tong arm and lower tong arm, the head of upper tong arm is fixedly connected with nose plier, the head that is positioned at the upper tong arm of nose plier below is hinged lower nose plier, one end of the other end of lower nose plier and lower tong arm is hinged, the middle part of lower tong arm is hinged a motion bar, protrude downwards at the middle part of motion bar, the other end of motion bar is arranged in tong arm, between the middle part of the middle part of described lower nose plier and upper tong arm inner side, extension spring is set, the afterbody of described upper tong arm arranges adjusting bolt, and make adjusting bolt prop up one end of the motion bar in tong arm, the afterbody of described lower tong arm is hinged a depression bar, one end of depression bar is arranged on the below at protrusion place, described motion bar bottom, in upper tong arm, the rear at the lower nose plier place of being hinged is fixedly installed a block, the relative part of described upper nose plier and lower nose plier arranges respectively the sawtooth linearly arranging.

The present invention is owing to there being motion bar to be connected between upper tong arm and lower tong arm, formed secondary lever, when holding workpiece, only the very little power of need can be by Workpiece clamping, the sawtooth of the relative part setting of upper nose plier and lower nose plier can be clamped workpiece firmly, depression bar on lower tong arm, for provoking the protrusion place of motion bar, is opened two nose pliers; The effect of extension spring is when two nose pliers clamp, make it the clamping force that keeps certain, adjusting bolt is for regulating motion bar in the position in upper tong arm, the opening and closing degree of nose plier is changed, can adapt to different workpiece processing requests, the effect of block is when lower nose plier is opened, and props up lower nose plier, prevents from excessively opening.

In sum, the large and operation of clamping force of the present invention easily.

Accompanying drawing explanation

Fig. 1 is a kind of structural representation of the present invention.

The specific embodiment

As shown in Figure 1, locking pliers, comprise tong arm 5 and lower tong arm 3, the head of upper tong arm 5 is fixedly connected with nose plier 8, the head that is positioned at the upper tong arm 5 of nose plier 8 belows is hinged lower nose plier 10, one end of the other end of lower nose plier 10 and lower tong arm 3 is hinged, the middle part of lower tong arm 3 is hinged a motion bar 4, protrude downwards at the middle part of motion bar 4, the other end of motion bar 4 is arranged in tong arm 5, between the middle part of the middle part of lower nose plier 10 and upper tong arm 5 inner sides, extension spring 6 is set, the afterbody of upper tong arm 5 arranges adjusting bolt 1, and make adjusting bolt 1 prop up one end of the motion bar 4 in tong arm 5, the afterbody of lower tong arm 3 is hinged a depression bar 2, one end of depression bar 2 is arranged on the below at motion bar 4 protrusion places, bottom, the rear at the interior lower nose plier of upper tong arm 5 10 places of being hinged is fixedly installed a block 7, the relative part of upper nose plier 8 and lower nose plier 10 arranges respectively the sawtooth 9 linearly arranging.

Claims

1. a locking pliers, it is characterized in that: comprise tong arm and lower tong arm, the head of upper tong arm is fixedly connected with nose plier, the head that is positioned at the upper tong arm of nose plier below is hinged lower nose plier, one end of the other end of lower nose plier and lower tong arm is hinged, the middle part of lower tong arm is hinged a motion bar, protrude downwards at the middle part of motion bar, the other end of motion bar is arranged in tong arm, between the middle part of the middle part of described lower nose plier and upper tong arm inner side, extension spring is set, the afterbody of described upper tong arm arranges adjusting bolt, and make adjusting bolt prop up one end of the motion bar in tong arm, the afterbody of described lower tong arm is hinged a depression bar, one end of depression bar is arranged on the below at protrusion place, described motion bar bottom, in upper tong arm, the rear at the lower nose plier place of being hinged is fixedly installed a block, the relative part of described upper nose plier and lower nose plier arranges respectively the sawtooth linearly arranging.