CN101637889B

CN101637889B - Labor-saving tong

Info

Publication number: CN101637889B
Application number: CN200910144615.0A
Authority: CN
Inventors: 周兴华; 顾兴保; 倪寿胜
Original assignee: JIANGSU JINLU GROUP CO Ltd
Current assignee: JIANGSU JINLU GROUP CO Ltd
Priority date: 2009-08-21
Filing date: 2009-08-21
Publication date: 2014-02-05
Anticipated expiration: 2029-08-21
Also published as: CN101637889A

Abstract

The invention discloses a labor-saving tong of which a tong head can be automatically expanded when working and can be furled when not working. The labor-saving tong comprises a left handle and a right handle, wherein a left tong head is fixedly arranged at the upper end of the right handle, a slide bar is arranged on the left handle, a slide bar is arranged in a slide groove at the lower end of a right tong head in a sliding way, the left tong head and the right tong head are movably hinged by a tong head pin, the left handle and the right handle are movably hinged by a handle pin fixedly arranged on the right handle, a boss is arranged at the middle lower part of the left handle, the inner side of the boss is aligned with the inner side of the left handle, the left handle and the right handle are respectively provided with a left handle sleeve and a right handle sleeve, a hollow cavity is arranged between the left handle sleeve and the inner side of the boss, and an inverted J-shaped elastic strip is movably arranged in the hollow cavity. The outer side of a bending section of the elastic strip supports against the inner side of the right handle when the labor-saving tong works, and the tail end of the bending section of the elastic strip can support against the inner side of the left handle, therefore, the invention is suitable for cutting workpieces of steel wires, and the like.

Description

Labor-saving plier

Technical field

The present invention relates to hardware & tools field, relate in particular to a kind of labor-saving plier.

Background technology

Existing labor-saving plier comprises: left handle and right handles, in the upper end of right handles, be fixedly installed left binding clip, the upper end of left handle is provided with slide bar, slide bar is slidably arranged in the chute of right binding clip lower end, left binding clip and right binding clip are movably hinged by binding clip pin, and left handle and right handles are movably hinged by being fixedly installed on the handle pin of right handles upper end.The labor-saving plier of said structure is lighter in the process of shearing, laborsaving, but before shearing, need, by finger, handle is applied to outside power, left handle and right handles are outwards opened, right binding clip and left binding clip outwards open under the drive of handle and right handles respectively leftward, then handle are applied to inside power, make right binding clip and left binding clip clamp workpiece, then continue to apply inside power, thereby realize the function of shearing.Before shearing, all to handle, apply outside power by finger at every turn, right binding clip and left binding clip are opened, very trouble.

Summary of the invention

Technical problem to be solved by this invention is: will provide a kind of when work binding clip can automatically open, the labor-saving plier that binding clip can be drawn in while not working.

For addressing the above problem, the technical solution used in the present invention is: labor-saving plier, comprise left handle and right handles, in right handles, be fixedly installed left binding clip, the upper end of left handle is provided with slide bar, slide bar is slidably arranged in the chute of right binding clip lower end, left binding clip and right binding clip are movably hinged by binding clip pin, left handle and right handles are movably hinged by the handle pin being fixedly installed in right handles, the middle and lower part of described left handle is provided with boss, the medial surface of boss flushes with the medial surface of left handle, in left handle and right handles, be arranged with respectively left hand sleeve and right hand sleeve, between left hand sleeve and the medial surface of boss, be provided with cavity, in cavity, be movably set with the flexure strip that is reversed J shape, when work, the lateral surface of the bending section of flexure strip and the medial surface of right handles offset, while not working, the end of flexure strip bending section can be allocated to the medial surface of left handle and offset.

The invention has the beneficial effects as follows: when work, binding clip automatically opens under the effect of flexure strip, while not working, only whole flexure strip need be allocated to left handle inner side, right binding clip and left binding clip can not open automatically with regard to drawing in.

Accompanying drawing explanation

Structural representation when Fig. 1 is labor-saving plier preparation shearing of the present invention;

Structural representation when Fig. 2 is labor-saving plier shearing of the present invention;

Fig. 3 is the structural representation in labor-saving plier of the present invention, flexure strip being allocated to when inconsistent with left handle medial surface;

Structural representation when Fig. 4 is the right binding clip of labor-saving plier of the present invention and the gathering of left binding clip;

Fig. 5 be in Fig. 1 A to partial structurtes schematic diagram;

Fig. 6 be in Fig. 3 B to partial structurtes schematic diagram;

Fig. 7 is C-C cutaway view in Fig. 5.

In figure: 1, left handle, 2, right handles, 3, left binding clip, 4, slide bar, 5, right binding clip, 6, chute, 7, binding clip pin, 8, handle pin, 9, boss, 10, left hand sleeve, 11, right hand sleeve, 12, cavity, 13, flexure strip, 14, seamed edge.

The specific embodiment

Below in conjunction with accompanying drawing, labor-saving plier of the present invention is described in further detail.

As Fig. 1, Fig. 5, shown in Fig. 7, a kind of labor-saving plier, comprise left handle 1 and right handles 2, in the upper end of right handles 2, be fixedly installed left binding clip 3, on left handle 1, be provided with slide bar 4, slide bar 4 is slidably arranged in the chute 6 of right binding clip 5 lower ends, left binding clip 3 and right binding clip 5 are movably hinged by binding clip pin 7, left handle 1 and right handles 2 are movably hinged by the handle pin 8 being fixedly installed in right handles 2, the middle and lower part of described left handle 1 is provided with boss 9, the medial surface of boss 9 flushes with the medial surface of left handle 1, in left handle 1 and right handles 2, be arranged with respectively left hand sleeve 10 and right hand sleeve 11, between the medial surface of left hand sleeve 10 and boss 9, be provided with cavity 12, in cavity 12, be movably set with the flexure strip 13 that is reversed J shape, when work, the lateral surface of the bending section of flexure strip 13 and right handles 11, while not working, the end of flexure strip 13 bending sections can be allocated to the medial surface of left handle 11 and offset.

Operation principle of the present invention is: when labor-saving plier is sheared workpiece, as shown in Fig. 1, Fig. 5, Fig. 7, the medial surface of the lateral surface of the bending section of flexure strip 13 and right handles 11 offsets.Now, right binding clip 5 and left binding clip 3 are in open configuration, by left hand sleeve 10 and right hand sleeve 11 are inwardly applied to active force, left handle 1 band moving slide-bar 4 is at the interior down sliding of chute 6, thereby the lower end that promotes right binding clip 5 makes right binding clip 5 rotate around binding clip pin 7, make right binding clip 5 and the mutual clamping of left binding clip 3, thereby reach the object of shearing.In this process, right handles 2 applies an inside active force to the lateral surface of flexure strip 13 bending sections when inwardly rotating, and the lateral surface of flexure strip 13 bending sections offsets with the medial surface of right handles 2 all the time, the bending section seamed edge 14 around boss 9 under the effect of right handles 2 medial surfaces that is flexure strip 13 rotates, and the lower straightway of flexure strip 13 is still in cavity 12, shear when complete, flexure strip 13 is in flexural deformation state---shown in Fig. 2.After shearing, unclamp left hand sleeve 10 and right hand sleeve 11, under the effect that right handles 2 is recovered in the natural deformation of flexure strip 13, separate with left handle 1, be that 13 pairs of right handles 2 of flexure strip apply an outside elastic force, make it to separate with left handle 1, right binding clip 5 and left binding clip 3 also open thereupon, reach right binding clip 5 and the object that left binding clip 3 opens automatically, can shear next workpiece subsequently.

When labor-saving plier is not worked, for the ease of being placed in kit, left handle 1 and right handles 2 need to be closed up.Now, mobile flexure strip 13 again after the bending section of flexure strip 13 is stirred to the right, the end of flexure strip 13 bending sections and the medial surface of left handle 1 are offseted, the lower straightway of flexure strip 13 is still in cavity 12, flexure strip 1 is in a small flexural deformation state---shown in Fig. 3, Fig. 6, flexure strip 13 does not just contact with right handles 2 like this, just can not apply outside elastic force to right handles 2 yet, and left handle 1 and right handles 2 just can be closed up and can automatically do not opened---shown in Fig. 4.Subsequently can be by labor-saving plier inserter bag.When labor-saving plier is worked, first left hand sleeve 10 and right hand sleeve 11 are applied to outside power, make left handle 1 and right handles 2 be separated into maximum, when flexure strip 13 dials to the position shown in Fig. 5, flexure strip 13 automatically restores to the position shown in Fig. 1 under the effect of its small Bending Deformation restoring force, can shear workpiece subsequently.

Claims

1. labor-saving plier, comprise left handle and right handles, in the upper end of right handles, be fixedly installed left binding clip, on left handle, be provided with slide bar, slide bar is slidably arranged in the chute of right binding clip lower end, left binding clip and right binding clip are movably hinged by binding clip pin, left handle and right handles are movably hinged by the handle pin being fixedly installed in right handles, it is characterized in that: the middle and lower part of described left handle is provided with boss, the medial surface of boss flushes with the medial surface of left handle, in left handle and right handles, be arranged with respectively left hand sleeve and right hand sleeve, between left hand sleeve and the medial surface of boss, be provided with cavity, in cavity, be movably set with the flexure strip that is reversed J shape, when work, the lateral surface of the bending section of flexure strip and the medial surface of right handles offset, while not working, the end of flexure strip bending section can be allocated to the medial surface of left handle and offset.