CN102717349A

CN102717349A - Straight-jaw locking pliers

Info

Publication number: CN102717349A
Application number: CN2011100781854A
Authority: CN
Inventors: 李军
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-03-30
Filing date: 2011-03-30
Publication date: 2012-10-10

Abstract

Straight-jaw locking pliers belong to a processing tool and are used for clamping. The straight-jaw locking pliers comprise an upper plier arm and a lower plier arm. The head of the upper plier arm is fixedly connected with an upper plier jaw; the head of the upper plier arm below the upper plier jaw is articulated with a lower plier jaw; the other end of the lower plier jaw is articulated with one end of the lower plier arm; the middle part of the lower plier arm is articulated with a movable rod; the middle part of the movable rod is protruded downwards; and the other end of the movable rod is arranged inside the upper plier arm. A tension spring is arranged between the middle part of the lower plier jaw and the internal middle part of the upper plier arm. A regulation bolt is arranged at the tail of the upper plier arm and is propped against one end of the movable rod inside the upper plier arm. A compression bar is hinged at the tail of the lower plier arm. One end of the compression bar is arranged below a bulge on the lower part of the movable rod. A stop block is fixedly arranged behind the hinged part of the lower plier jaw inside the upper plier arm. Sawteeth are linearly arranged on the opposite parts of the upper and lower plier jaws respectively. The straight-jaw locking plier has a big clamping force and is easy to operate.

Description

Straight shape of the mouth as one speaks 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

Being used for the common tool that the clamping workpiece processes at present is the pliers that the tiger pincers wait a lever principle of utilization; When the clamping workpiece; Owing to directly lean on people's hand to have an effect, be directly conducted to workpiece through a lever, cause clamping force less; Clamped workpiece is got loose, and operation effort and clamping effect are bad.

Summary of the invention

The objective of the invention is: provide a kind of clamping force the big and straight easily shape of the mouth as one speaks locking pliers of operation.

The objective of the invention is to realize like this: straight shape of the mouth as one speaks locking pliers, comprise tong arm and following tong arm, the head fixed connection of last tong arm is gone up pincers and is chewed; Be positioned at pincers and chew the head of last tong arm of below and be hinged down pincers and chew, clamp the other end chewed and an end of following tong arm is hinged down, the middle part of following 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 the tong arm, between the middle part that said pincers are down chewed and the middle part of last tong arm inboard extension spring is set, and the said afterbody of going up tong arm is provided with the adjusting bolt; And make the adjusting bolt prop up an end of the motion bar in the tong arm; The said afterbody of tong arm down is hinged a depression bar, and an end of depression bar is arranged on the below at protrusion place, said motion bar bottom, clamps the rear of chewing the place of being hinged in the last tong arm down and fixedly installs a block; Said upward pincers are chewed and are descended to clamp the relative part of chewing the sawtooth that linearly is provided with is set respectively.

The present invention is owing to there is motion bar to be connected between tong arm and the following tong arm; Constituted the secondary lever; When the clamping workpiece, only need very little power can workpiece be clamped, last pincers are chewed and are descended to clamp the sawtooth of the relative part setting of chewing and can firmly workpiece be clamped; Depression bar on the following tong arm is used to provoke the protrusion place of motion bar, two pincers is chewed opened; The effect of extension spring is when two pincers are chewed clamping; Make it the clamping force that keeps certain, regulate bolt and be used to regulate motion bar, the opening and closing degree change that pincers are chewed in the position in last tong arm; Can adapt to the different workpiece processing request; The effect of block is to chew when opening at following pincers, props up down to clamp and chews, and prevents excessively to open.

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

Description of drawings

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

The specific embodiment

As shown in Figure 1, straight shape of the mouth as one speaks locking pliers comprises tong arm 5 and following tong arm 3; The head of last tong arm 5 is fixedly connected to be gone up pincers and chews 8, is positioned at pincers and chews the head of the last tong arm 5 of 8 belows and be hinged down to clamp and chew 10, and following the pincers chewed 10 the other end and an end of following tong arm 3 is hinged; The middle part of following tong arm 3 is hinged a motion bar 4, and protrude downwards at the middle part of motion bar 4, and the other end of motion bar 4 is arranged in the tong arm 5; Following pincers are chewed between the middle part of 10 middle part and last tong arm 5 inboards extension spring 6 are set; The afterbody of last tong arm 5 is provided with regulates bolt 1, and makes adjusting bolt 1 prop up an end of the motion bar 4 in the tong arm 5, and the afterbody of following tong arm 3 is hinged a depression bar 2; One end of depression bar 2 is arranged on the below at protrusion place, motion bar 4 bottom, clamps the rear of chewing 10 places of being hinged in the last tong arm 5 down and fixedly installs a block 7; Last pincers are chewed 8 and are chewed 10 relative part with pincers down the sawtooth 9 that linearly is provided with is set respectively.

Claims

1. straight shape of the mouth as one speaks locking pliers is characterized in that: comprise tong arm and following tong arm, the head of last tong arm is fixedly connected to go up to clamp and chews; Be positioned at pincers and chew the head of last tong arm of below and be hinged down pincers and chew, clamp the other end chewed and an end of following tong arm is hinged down, the middle part of following 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 the tong arm, between the middle part that said pincers are down chewed and the middle part of last tong arm inboard extension spring is set, and the said afterbody of going up tong arm is provided with the adjusting bolt; And make the adjusting bolt prop up an end of the motion bar in the tong arm; The said afterbody of tong arm down is hinged a depression bar, and an end of depression bar is arranged on the below at protrusion place, said motion bar bottom, clamps the rear of chewing the place of being hinged in the last tong arm down and fixedly installs a block; Said upward pincers are chewed and are descended to clamp the relative part of chewing the sawtooth that linearly is provided with is set respectively.