CN87200819U

CN87200819U - Dual-purpose adjustable spanner

Info

Publication number: CN87200819U
Application number: CN 87200819
Authority: CN
Inventors: 杨安其
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-01-21
Filing date: 1987-01-21
Publication date: 1988-07-13

Abstract

The utility model discloses a dual-purpose adjustable spanner, belonging to hand tools. The movable claws of the wrench show bow hook shape, and two claws of the wrench adopt V-shaped diagonal method to clamp workpiece through an axle pin and a movable frame of movable connecting. The workpiece can be automatically clamped in the moment of reaction when pulling the workpiece, completely avoiding slippage. The workpiece can be automatically loosed when in recoiling, achieving quick operating without taking out. When two claws of the wrench are changed to two spare claws, the wrench is changed into a pipe wrench. The wrench has the functions of ordinary adjustable wrench, sleeve wrench, and pipe wrench, which is especially suitable for field pipe maintenance of petrochemical industry in combustible and explosive environment.

Description

Dual-purpose adjustable spanner

The utility model is a kind of improved monkey wrench, particularly a kind of can returning quickly, clamping is non-slip, is applicable to the dual-purpose monkey wrench of pulling turret head and pipe, it belongs to a kind of hand-operated tools.

Known monkey wrench, effect by screw rod, tooth bar, can regulate the size of pulling mouthful, but need unclamp, take out from workpiece during return, change after the angle again workpiece on the card then, clamp, could continue to pull, this spanner is owing to all adopting two parallel opposite side clampings, again because the wearing and tearing of screw rod, tooth bar, the gap increases gradually, is become flexible, skids so pull workpiece with quilt easily.This skidding not only easily caused to the operator or to the damage of equipment, and, having under the environment of inflammable, explosive medium, because the spark that the bump that skids produces also has the potential danger that causes catastrophic failure.

Known box spanner, the function by the ratchet mechanism return skids can realize quick operation, but can not transfer pull a mouthful size, has to prepare a cover spanner in order to replacing, thereby the cost height, carries inconvenience.

The Japan Patent spy drives the automatic open-end wrench of clear 54-11598 and the clear 54-11599 description of Te Kai, utilizes the engaging structure between the movable claw of being with tooth bar and the handle of being with gear, pulls a mouthful size to realize change, automatically the kinetic energy of clamping and returning quickly.Still require to have bigger space but rotate during return, use in some place to be restricted.

The purpose of this utility model is to design a kind of the adjusting and pulls a mouthful size, can clamp automatically and returning quickly, and is non-slip, can pull the combination wrenches of turret head and pipe.

As shown in Figure 1, the utility model is made of movable claw (1), pivot pin (2), spring (3), adjustable shelf (4), handle (5), adjusting nut (6), fixed claw (7) and pin parts such as (8), and to be furnished with clamping face be zigzag zigzag movable claw (9) and zigzag fixed claw (10).

Movable claw (1) becomes with adjustable shelf (4) by pivot pin (2) can be around the flexible connection of pivot pin (2) rotation.On adjustable shelf (4), be drilled with an aperture, wherein lay spring (3), make elastic force always pushing tow the afterbody of movable claw.

When being wrenched workpiece, (establishing clockwise and turn to), under the effect of spring (3) jacking force, movable claw (1) always is close to workpiece, movable claw this moment (1) also is subjected to the reaction force acts of workpiece, they form anticlockwise torque to pivot pin (2), so when being wrenched, movable claw (1) is tightly pushed down workpiece and is non-slip.

During the spanner return, needn't unclamp, take out, as long as handle (5) is to counter clockwise direction rotate to an angle (spending greater than 30) from workpiece.At this moment, because movable claw (1) is subjected to the reaction force acts of workpiece, this power forms clockwise torque (the counterclockwise torque that this torque causes much larger than spring (3)) to pivot pin (2), movable claw (1) will be around pivot pin (2) rotation one angle, cause loosening and skid with workpiece, thereby realize operation fast.

The clamping face of movable claw (1) and fixed claw (7) holding workpiece all is designed to " V " shape face of 120 degree (being applicable to turret head) or 90 degree (being applicable to square toes), the two parallel opposite clampings that are about to general spanner are improved to the diagonal angle clamping of " V " type, its advantage is that clamping is firm, never skids.

By pivot pin (2) and pin (8), can unload movable claw (1) and fixed claw (7) respectively, replace with accessory zigzag movable claw (9) and zigzag fixed claw (10), then spanner has been repacked into the bulldog wrench that is used to pull pipe fitting.

There is screw thread the front portion of handle (5), and by rotation adjusting nut (6), drive adjustable shelf (4) and movable claw (1) and move forward and backward, thus mouthful size of pulling of regulating spanner.

Advantage of the present utility model is:

A, can conveniently regulate the size of pulling mouthful;

B, the handle that only need swing back and forth when operating need take out from workpiece, can realize operation fast;

C, V-type diagonal angle holding workpiece, solid and reliable, never skid;

D, can pull turret head (square toes) and pipe, one dual-purpose;

E, simple in structure, easy to manufacture, with low cost, easy to carry, result of use is good.

This spanner has normal activity spanner, box spanner and bulldog wrench three's function concurrently, improves its shortcoming, is specially adapted to oil, chemical industry has the on-the-spot pipeline maintenance under the inflammable and explosive media environment.

As embodiment, Fig. 4-Fig. 7 has provided the 250mm(10 inch respectively) spanner of specification and the key dimension of part thereof, this specification is applicable to hex head screw, the nut of pulling M4-M20, change two pawls after, can pull the 60mm(2 inch) pipe.Spanner can be used the carbon steel die-forging forming, after modified heat treatment, and the chrome-faced polishing.

Claims

1, a kind of monkey wrench of forming by fixed claw, handle, the adjustable shelf that has claw and adjusting nut, it is characterized in that claw is a movable claw, movable claw is connected with adjustable shelf by pivot pin, and adjustable shelf and handle flexibly connect by adjusting nut, and the spring that heads on the movable claw afterbody is housed on the adjustable shelf.Fixed claw is fixed on the end of handle with pin, and the clamping face of movable claw and fixed claw is " V " clevis mouth.

2,, it is characterized in that the angle of " V " shape clamping face of movable claw and fixed claw is 90 ° or 120 ° according to the described monkey wrench of claim 1.

3,, it is characterized in that movable claw and fixed claw all can unload, and replace with accessory respectively: zigzag movable claw and zigzag fixed claw according to the described monkey wrench of claim 1.