CN2889624Y

CN2889624Y - Self-screwing type pipe wrench

Info

Publication number: CN2889624Y
Application number: CN 200620078597
Authority: CN
Inventors: 张新宽
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-03-20
Filing date: 2006-03-20
Publication date: 2007-04-18
Anticipated expiration: 2016-03-20

Abstract

The utility model relates to a self-tightening pipe wrench. The pipe wrench has a wrench head, a fixed jaw and a movable jaw arranged on the lower part of the wrench head, wherein the movable jaw is arranged on the wrench head through a slide rail structure; and an elastic lifting pin is provided in the fixed jaw for acting on the movable jaw. A handle is hinged with the tail end of the wrench head, a lifting lever vertically bending downwards is arranged on the front end of the handle, and a slant brace is provided on the tail end of the wrench head to extend to the upper portion of the handle, wherein a pressing spring is connected between the slant brace and the handle; and symmetric V-shape grooves are arranged on the fixed jaw and the movable jaw to form axisymmetric four-point contact when the jaws are clamped. Accordingly, the utility model can prevent deformation of pipe due to application of very large force. The utility model can also be used for screw nuts and common work piece. The provisions of the slant brace, pressing spring and elastic lifting pin can prevent slippage. The utility model has reasonable structure and convenient operation in comparison with the prior art.

Description

The self-tightening type pipe wrench

Affiliated technical field

The utility model relates to a kind of self-tightening type pipe wrench, particularly a kind of self-tightening type pipe wrench of anti-skidding, anti-pipe fitting distortion.

Background technology

In prior art, Chinese patent 88219570 has been announced a kind of Self-locking pipe tongs, this pipe wrench is made of the handle that a hook-type binding clip and hinge are associated on the hook-type binding clip, the hook-type binding clip is as regular jaw, the forward lower comer of handle extends to form moving jaw forward, this Self-locking pipe tongs is 3 contacts when clamping, and has advantage non-slip and that do not pull pipe fitting.Though this Self-locking pipe tongs can form 3 contacts, these three contact points that is to say that along the skewness of tube wall circumference stress point is skewness on the tube wall circumference, thereby might exert oneself pipe fitting to be deformed when excessive; Moreover, moving jaw be with handle move up and down and opening and closing, when pre-the clamping, jaw can not clamp pipe fitting, has the gap between jaw and the pipe fitting, firmly skid easily in this case; Because binding clip and handle hinge join, when jaw clamped in advance and unloads, handle was not easy to control binding clip, made operation not nimble again; In addition, the jaw structure of this pipe wrench can not the double as nut etc. common workpiece spanner.Therefore, the structure of this pipe wrench is reasonable not enough, and result of use is also not ideal enough.

The utility model content

The purpose of this utility model is the shortcoming at prior art, provides a kind of rational in infrastructure, anti-slip, anti-pipe fitting distortion, operation is nimble and self-tightening type pipe wrench that can the double as nut spanner.

For achieving the above object, solution of the present utility model is as follows:

It has a binding clip, Lower Half at this binding clip is provided with a regular jaw facing each other and a moving jaw, described moving jaw is installed on the binding clip by rail structure, the actinal surface that a spring knock pin acts on moving jaw is housed in regular jaw, handle of tail end hinge connection at described binding clip, and the front end of this handle is provided with a vertical curved top down and shoulders the back side that acts on moving jaw, also be provided with one at the tail end of described binding clip and above handle, stretch out hound, between this hound and handle, be connected a stage clip, on regular jaw and moving jaw, be respectively equipped with the indent V-arrangement folder mouth of symmetry, and on indent V-arrangement folder mouth, be provided with the pincers tooth.

The further improvement project of the utility model is:

Above-mentioned indent V-arrangement folder mouth is produced on the embedded block of regular jaw and moving jaw, and described abaculus is fixed on the actinal surface of regular jaw and moving jaw by screw.

Above-mentioned binding clip front end is arc surfaced.

By above-mentioned solution as can be seen, jaw of the present utility model is axisymmetric 4 contacts when clamping, it is more even that stress point is distributed on the circumference of tube wall, pipe fitting distortion when excessive has prevented to exert oneself, simultaneously, but its indent V-arrangement folder mouth also makes pipe wrench double as nut and common workpiece spanner.Hound, stage clip and elastic top latch structure that the utility model adopts can guarantee jaw when pre-the clamping, no gap between jaw and the pipe fitting and be in clamped condition, prevented to skid, simultaneously, also binding clip and handle are connected as a single entity, are easy to control the clamping of jaw and unload.Therefore, the utility model compared with the prior art have structure more rationally, anti-slip, anti-pipe fitting distortion, operation is nimble and advantage that can the double as nut spanner.

Description of drawings

Fig. 1, overall structure schematic diagram of the present utility model.

The schematic diagram of Fig. 2, the utility model clamping pipe fitting state.

The schematic diagram of Fig. 3, the utility model clamping nut state.

The specific embodiment

Describe structure of the present utility model and operation principle in detail according to embodiment below.

Referring to Fig. 1, it has a binding clip 1, Lower Half at binding clip 1 is provided with a regular jaw 1-1 facing each other and a moving jaw 2, moving jaw 2 is installed on the binding clip 1 by rail structure 1-2, the actinal surface that a spring knock pin 3 acts on moving jaw is housed in regular jaw 1-1, handle 4 of tail end hinge connection at binding clip 1, handle 4 front ends are provided with a vertical curved down top and shoulder 4-1 and act on moving jaw 2 back sides, also be provided with one at binding clip 1 tail end and above handle 4, stretch out hound 5, between hound 5 and handle 4, be connected a stage clip 6.On regular jaw 1-1 and moving jaw 2, be respectively equipped with the indent V-arrangement folder mouth of symmetry, and on the actinal surface of indent V-arrangement folder mouth, be provided with the pincers tooth, described V-arrangement indent folder mouth is fabricated on the embedded

block

7,8 of regular jaw 1-1 and moving jaw 2, and described embedded block is fixed on the actinal surface of regular jaw and moving jaw by screw.

Referring to Fig. 2,3, when pre-clamp spare 9 or nut 10, hold hound 5 and handle 4, and they are held with a firm grip close up, at this moment, the top is shouldered 4-1 and is removed power, makes it to the top power of the moving jaw 2 top power less than 3 pairs of moving jaws of spring knock pin, then moving jaw slides with respect to regular jaw and opens, at this moment, can make jaw vise pipe fitting, lax then grip, then the top power recovery of 4-1 is shouldered on the top, make jaw clamp pipe fitting (state as shown in Figure 2), at this moment, can go up, under pull handle 4, then jaw is along with on the handle, following motion and unclamp pipe fitting and clamp pipe fitting realizes tightening operation.When clamping the tooth mill immediately, replaceable embedded

block

7,8 more renews tooth.Described binding clip front end adopts arc surfaced, makes binding clip enter small space easily.

Claims

1, a kind of self-tightening type pipe wrench, it is characterized in that: it has a binding clip (1), Lower Half at this binding clip is provided with a regular jaw facing each other (1-1) and a moving jaw (2), described moving jaw is installed on the binding clip (1) by rail structure (1-2), the actinal surface that a spring knock pin (3) acts on moving jaw (2) is housed in regular jaw (1-1), tail end hinge connection handle (4) at described binding clip (1), and the front end of this handle is provided with a vertical curved top down and shoulders the back side that (4-1) acts on moving jaw (2), also be provided with one at the tail end of described binding clip (1) and stretch out hound (5) to handle (4) top, between this hound and handle (4), be connected a stage clip (6), on regular jaw (1-1) and moving jaw (2), be respectively equipped with the indent V-arrangement folder mouth of symmetry, and on indent V-arrangement folder mouth, be provided with the pincers tooth.

2, self-tightening type pipe wrench according to claim 1, it is characterized in that: described indent V-arrangement folder mouth is produced on the embedded block (7,8) of regular jaw (1-1) and moving jaw (2), and described abaculus (7,8) is fixed on the actinal surface of regular jaw (1-1) and moving jaw (2) by screw.

3, self-tightening type pipe wrench according to claim 1 and 2 is characterized in that: the front end of described binding clip (1) is arc surfaced.