CN201175882Y

CN201175882Y - Self-tightening type rapid positioning motor wrench

Info

Publication number: CN201175882Y
Application number: CNU2008200838466U
Authority: CN
Inventors: 吴俊华
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-03-03
Filing date: 2008-03-03
Publication date: 2009-01-07
Anticipated expiration: 2018-03-03

Abstract

The utility model discloses a self-tightening pipe wrench capable of caliber quick positioning, which is composed of a wrench handle, a telescopic jaw and a worm. The front end of the wrench handle is equipped with an oblique guide rail, and a movable jaw is arranged on the guide rail. The upper end of the wrench handle is provided with a guide hole, the worm is coaxially disposed at the middle portion of the guide hole, the worm is hollow, and the inner hole wall of the worm is equipped with two threads in a spaced and symmetric way. The telescopic jaw includes a head portion and a guide rod, the position of the head portion corresponds to the movable jaw, the guide rod penetrates through the guide hole of the wrench handle and the inner hole of the worm, the upper side and the lower side of the guide rod are arc surfaces engaged with the guide hole, and threaded grooves which can be meshed with the inner thread of the worm are arranged on the arc surfaces. The self-tightening pipe wrench overcomes shortages that the existing pipe wrench is slow in caliber adjustment and small in holding force, and utilizes one worm with symmetrical thread and the movable self-tightening jaw structure, thereby having the advantages of quick caliber positioning and large holding force, and further the self-tightening pipe wrench is particularly suitable for assembly and disassembly of various round tubes or round work-pieces.

Description

The quick bore positioning tube pincers of a kind of self-tightening type

Technical field

The utility model relates to a kind of pipe vice, the quick bore positioning tube pincers of particularly a kind of self-tightening type.

Background technology

Existing pipe vice is mainly formed by clamping handle, flexible jaw, worm screw, leaf spring and being fixed on the jaw that clamps on the handle with pin on the market, when operation, at first according to workpiece size, regulate worm screw continuously and determine that caliber size makes it to match with workpiece, utilize flexible jaw and the design gaps that clamps the handle guide hole subsequently, the workpiece forward is formed chucking power, and the principle that oppositely gets loose is carried out work.Find that through use for many years there is certain shortcoming in this kind pipe vice, when workpiece size changes, can only regulate worm screw continuously and regulate bore, can not settle at one go, its governing speed is slow, inefficiency; Simultaneously excessive because of the design gaps between flexible jaw, worm screw and pincers handle guide hole, cause the active force of workpiece inhomogeneously, be easy to be offset, skidding, thereby damage surface of the work; In addition, must operate simultaneously by both hands in use, each firmly preceding necessary on the other hand firmly in the pincers handle, proficiency be pushed down the jaw end, has enough initial frictional with assurance; In addition, the leaf spring in the guide hole is puted forth effort to be forbidden, and is inoperative basically when operation.

The utility model content

The purpose of this utility model is to provide a kind of self-tightening type quick bore positioning tube pincers, it utilizes a symmetrical thread worm and movable from gripping mouth structure, have the advantages that the bore location is rapid, chucking power is big, be specially adapted to the usefulness of the loading and unloading of various pipes or round piece.

For achieving the above object, the utility model is by the following technical solutions:

The quick bore positioning tube pincers of a kind of self-tightening type, form by pincers handle, flexible jaw and worm screw, it is characterized in that: described pincers handle front end is provided with an oblique guide rail, one moving jaw is set on the guide rail, the trailing flank of moving jaw matches with plurality of ramps, the upper end is connected with the pincers handle by spring, is positioned to clamp on the handle in the centre by a pin that passes the stroke guide hole simultaneously; Described pincers handle upper end has a pilot hole, and the middle part of pilot hole is coaxial to be provided with worm screw, the worm screw inner hollow, and its inner hole wall is symmetrically arranged with two screw threads at interval; Described flexible jaw is divided into head and guide rod two parts, head position is corresponding with moving jaw, guide rod then passes the pilot hole and the inner bore of worm of pincers handle, the arc surface of the both sides up and down of guide rod for matching with pilot hole, arc surface is provided with the thread groove that can be meshed with the worm screw internal thread.

The spacing distance of above-mentioned inner bore of worm two screw threads is greater than the width between the flexible jaw guide rod front-back.

The above-mentioned worm screw outside is symmetrically arranged with two shift forks.

The front and back sides of above-mentioned guide rod is provided with scale.

The utility model has been removed the flexible jaw of existing pipe vice and has been passed the design gaps of pincers handle pilot hole between worm screw, changes the general level and smooth pilot hole in little gap into, makes flexible jaw even to the active force of workpiece, has reduced the generation of skew and skidding.

In use, the shift fork of at first stirring on the worm screw makes the worm screw rotation, screw thread on the inner bore of worm and the thread groove on the flexible jaw guide rod are separated, at this moment can observe the size scale of design on two sides before and after the flexible jaw on one side, the flexible jaw of free push-and-pull on one side up to the workpiece size fit, dial back subsequently worm screw, the thread groove on inner hole thread and the flexible jaw guide rod is suited again, thereby reach the rapid adjustment and the location of bore.

Be equipped with below the trailing flank of moving jaw of the present utility model and the guide rail, begin clockwise firmly when clamping handle when putting workpiece, under the effect of frictional force between moving jaw and workpiece, moving jaw can upwards slide and the compression spring along plurality of ramps, and then the bore between moving jaw and the flexible jaw is further dwindled, strengthen clamp pressure.And when loosening the pincers handle, under the effect of compression spring restoring force, moving jaw back slides downwards, gets loose to the clamping of workpiece, and the whole operation process is light, laborsaving, quick, and a hand just can be operated.

Description of drawings

Fig. 1, structural representation of the present utility model;

Among Fig. 2, the utility model Fig. 1 A-A to schematic cross-section;

The perspective view of Fig. 3, the utility model moving jaw.

The specific embodiment

Shown in Fig. 1,2 and 3, the quick bore positioning tube pincers of a kind of self-tightening type are made up of pincers handle 1, flexible jaw 2 and worm screw 3.

Pincers handle 1 front end is provided with an oblique guide rail, and a moving jaw 4 is set on the guide rail, and the trailing flank 42 of moving jaw 4 matches with plurality of ramps, and the upper end is connected with pincers handle 1 by spring 5.Simultaneously, one stroke guide hole 41 is set on moving jaw 4, it is positioned to clamp on the handle 1 by a pin 6, and in use, whole moving jaw 4 compressible spring 5 follow journey guide hole 41 and plurality of ramps is upwards slided.

Pincers handle 1 upper end has a pilot hole 11, and the middle part of pilot hole 11 is coaxial to be provided with worm screw 3, and worm screw 3 outsides are symmetrically arranged with two shift forks 31, can stir shift fork 31 in use and make worm screw 3 produce rotation.Worm screw 3 inner hollow, its inner hole wall are symmetrically arranged with two screw threads 32 at interval.

Described flexible jaw 2 is divided into head 21 and guide rod 22 two parts, and wherein head 21 positions are corresponding with moving jaw 4, and guide rod 22 then passes the pilot hole 11 and worm screw 3 endoporus of pincers handle 1.The front and back sides of guide rod 22 is provided with scale, the observation that can be convenient for people to, the arc surface of the both sides up and down of guide rod 22 for matching with pilot hole 11, arc surface is provided with the thread groove 221 that can be meshed with worm screw internal thread 32, here, for making the disengaging fully that is connected with a joggle between the two behind the assurance rotary worm 3, the spacing distance of inner bore of worm two screw threads 32 of design is greater than the width between flexible jaw guide rod 22 front-backs.

The utility model has been removed the flexible jaw of existing pipe vice and has been passed the design gaps of pincers handle pilot hole between worm screw, changes the level and smooth pilot hole 11 in general little gap into, makes the active force of flexible 2 pairs of workpiece 7 of jaw even, has reduced the generation of skew and skidding.

In use, the shift fork of at first stirring on the worm screw 31 makes worm screw 3 rotations, screw thread 32 on worm screw 3 endoporus is separated with thread groove 221 on the flexible jaw guide rod 22, at this moment can observe the size scale of design on flexible two sides, jaw guide rod 22 front and back on one side, the flexible jaw 2 of free push-and-pull on one side up to workpiece 7 size fits, dial back subsequently worm screw 3, the thread groove 221 on inner hole thread 32 and the flexible jaw guide rod is meshed again, thereby reach the rapid adjustment and the location of bore.Then put workpiece 7 beginnings clockwise firmly in pincers handle 1, this moment moving jaw 4 and workpiece between the effect lower edge plurality of ramps of 7 frictional force upwards slide and compression spring 5, and then the bore between oral 21 of moving jaw 4 and the extension tongs is further dwindled, strengthen clamp pressure.And when loosening pincers handle 1, under the effect of compression spring 5 restoring forces, moving jaw 4 back slides downwards, gets loose to the clamping of workpiece 7, and the whole operation process is light, laborsaving, quick, and a hand just can be operated.

Claims

1, the quick bore positioning tube pincers of a kind of self-tightening type, form by pincers handle, flexible jaw and worm screw, it is characterized in that: described pincers handle front end is provided with an oblique guide rail, one moving jaw is set on the guide rail, the trailing flank of moving jaw matches with plurality of ramps, the upper end is connected with the pincers handle by spring, is positioned to clamp on the handle in the centre by a pin that passes the stroke guide hole simultaneously; Described pincers handle upper end has a pilot hole, and the middle part of pilot hole is coaxial to be provided with worm screw, the worm screw inner hollow, and its inner hole wall is symmetrically arranged with two screw threads at interval; Described flexible jaw is divided into head and guide rod two parts, head position is corresponding with moving jaw, guide rod then passes the pilot hole and the inner bore of worm of pincers handle, the arc surface of the both sides up and down of guide rod for matching with pilot hole, arc surface is provided with the thread groove that can be meshed with the worm screw internal thread.

2, the quick bore positioning tube pincers of a kind of self-tightening type as claimed in claim 1, it is characterized in that: the spacing distance of described inner bore of worm two screw threads is greater than the width between the flexible jaw guide rod front-back.

3, the quick bore positioning tube pincers of a kind of self-tightening type as claimed in claim 1, it is characterized in that: the described worm screw outside is symmetrically arranged with two shift forks in the center relatively.

4, the quick bore positioning tube pincers of a kind of self-tightening type as claimed in claim 1, it is characterized in that: the front and back sides of described guide rod is provided with scale.