CN2576423Y

CN2576423Y - Tube-sheet strong tongs

Info

Publication number: CN2576423Y
Application number: CN 02259580
Authority: CN
Inventors: 李毅
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-09-28
Filing date: 2002-09-28
Publication date: 2003-10-01
Anticipated expiration: 2012-09-28

Abstract

The utility model discloses a pair of tube-sheet locking pliers. A jaw is composed of a smooth convex circular arc surface and a toothed cusp surface arranged behind the smooth convex circular arc surface, and the inclined angle between the two surfaces is more than 120 DEG. The pliers are provided with a hand vice at a lock clamp plate, a screw or the hexagonal opposite sides of a valve, so during pulling the pliers, the smooth arc surface can not damage a clamped work piece. When a circular tube locked and clamped, two jaws hug and four points clamp tightly, and the toothed cusps can prevent slipping effectively; therefore, the utility model can be turned forwardly and inversely to work, and the utility model is convenient in use. The pliers make full use of the clamping force of hundreds of kilogram of the locking pliers, and can be used as a pair of wire pliers, a hand vice, a spanner and a tube tongs to easily finish daily pipe fitting and mechanical repairing.

Description

A kind of pipe is pulled locking pliers

The utility model relates to a kind of pipe and pulls locking pliers, belongs to wrench class hand-held tool.

Pipeline specialized hand tool mainly contains water pump pliers and pipe vice.During with the water pump pliers operation, need hand-tight shank part (handgrip) ability switching pipe fitting,, use hard though pliers is low weight.The then similar adjustable wrench of pipe vice can not clamp workpiece, because two clamping jaws parallel, saw shape crown one positive on it is anti-, can only pull towards a direction when the switching pipe, and is not in place if jaw is regulated, also can cause and skid, when particularly clamping odontotripsis, the easier generation of skidding.Locking pliers is big because of jaw opens regulated quantity, clamping force is big, unique folder lock function, so cutting pliers are not only arranged, the effect of hand vice, also can replace spanner and pipe vice, but (basal plane that no matter is jaw is flat mouthful to locking pliers, Pear-Shaped, still circle or middle have round) jaw all has the triangle pointed tooth, because hundreds of kilograms folder lock power, the crown that hardens will make surface of the work stay impression, this is not for locker switching pipe obviously favourable (can skid), but for the smooth flat board of locker or the opposite side of valve hexagonal, crush and not only destroyed the matrix effect outward appearance, also may be coated with (plating) layer because of destruction and accelerate corrosion, so people are generally pressed from both sides without locking pliers and are pulled hexagonal in pipeline installation or flight-line maintenance, unless screw has got rusty or hexagonal is destroyed.

The purpose of this utility model provides a kind of pipe and pulls locking pliers, not only clamping force is big, the folder thing can pin, function with cutting pliers, and when doing hand vice, spanner use, can not destroy the caught workpiece surface, it is non-slip to let alone positive and negative switching when folder is pulled pipe, thus the effect of real performance hand vice, spanner, pipe vice in daily pipeline and flight-line maintenance.

For achieving the above object, the utility model is on known locking pliers architecture basics, and two jaws are made up of convex arc surface and plane, and angle is greater than 120 degree between the two sides, and convex arc surface is smooth cambered surface, then is provided with crown saw shape tooth forward on the plane.Jaw is when folder lock flat board or hexagonal opposite side like this, and smooth circular arc can damaging surface, because therefore convex arc surface and interplanar angle can not damage the top of the horn greater than 120 degree yet when clamping large scale hexagonal opposite side.Jaw is filled the span of a man's arms for two jiaos and is then become 4 clampings during held circular pipe, adds the sawtooth point on the plane again, can more effectively stop and skid.In addition, owing to only change the jaw shape, do not influence the blade of setting up of jaw root, so pliers is still had a shear action of cutting pliers.

Owing to adopt such scheme, the utility model pipe is pulled the big advantage that can lock of folder power that locking pliers can make full use of original locking pliers, can the defective work piece surface when making hand vice and spanner, any positive and negative the reversing yet of clamp can not skidded when installing or keep in repair pipeline, really brought into play the effect of spanner and pipe vice.

Below in conjunction with the embodiment of accompanying drawing, the utility model is described in further detail.

Accompanying drawing 1 is the utility model example structure figure.

Accompanying drawing 2 is the utility model design sketch when the clamping small size workpiece.

Accompanying drawing 3 is the utility model design sketch when the clamping large-size workpiece.

1. jaws 2. are decided binding clip 3. binding clip 4.5.6. rivet 7. extension springs 8. rivets 9. support thick sticks 10. little rivet 11. stalklets 12. torsion springs 13. big handles 14. disengagement handles 15. adjustment screw alive in the accompanying drawing.

Accompanying drawing 1 explanation the utility model pipe is pulled locking pliers and is formed (known locking pliers structure) by deciding binding clip 2, binding clip 3 alive, extension spring 7, support thick stick 9, stalklet 11, torsion spring 12, big handle 13, disengagement handle 14, adjustment screw 15,

rivet

4,5,6,8 and little rivet 10.Decide binding clip 2 and the jaw 1 of the binding clip 3 of living is formed by the convex arc surface of front portion and the plane at rear portion, angle is greater than 120 degree between the two sides, and convex arc surface is smooth cambered surface, then is provided with crown saw shape tooth forward on the plane.

Accompanying drawing 2 is the utility model design sketch when the clamping small size workpiece, small size workpiece contact-making surface when clamping is positioned at the smooth cambered surface of jaw front portion, increase along with size, the clamping contact-making surface moves after progressively, angle (seeing accompanying drawing 3) between near the two sides, because therefore angle can not damage the hexagonal the top of the horn greater than 120 degree between the two sides.

By the equal angle between the two sides of visible again pole (pipe) bite of accompanying drawing 2 and accompanying drawing 3, clearly, the sawtooth on the plane will play anti-skidding effect at this moment.

Claims

1, a kind of pipe is pulled locking pliers, form by deciding binding clip, binding clip alive, extension spring, support thick stick, stalklet, torsion spring, big handle, disengagement handle, adjustment screw and rivet, it is characterized in that: the jaw 1 of deciding binding clip 2 and binding clip 3 alive is by the convex arc surface of front portion and the plane composition at rear portion.

2, pipe according to claim 1 is pulled locking pliers, it is characterized in that: the anterior convex arc surface and the interplanar angle at rear portion are greater than 120 degree.

3, pipe according to claim 1 is pulled locking pliers, it is characterized in that: convex arc surface is smooth cambered surface, then is provided with crown saw shape tooth forward on the plane.