CN2127900Y

CN2127900Y - Pipe twist

Info

Publication number: CN2127900Y
Application number: CN 92227109
Authority: CN
Inventors: 董志刚
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-07-15
Filing date: 1992-07-15
Publication date: 1993-03-10
Anticipated expiration: 2002-07-15

Abstract

The utility model provides a pipe twist whose opening amount is big, and the opening degree of opening is self adjusted. The pipe twist is combined with a simple stop tone to form a three-point contact. The pipe twist clamps various self locking specification workpieces when the workpieces are in an optimum self locking state. The utility model has the advantages of non-sliding, no sharp pointed tooth, no damaging for the workpiece surface, flexible operation, simple structure, light weight and convenient carrying. The pipe twist comprises a handle, a twist head, an oblate adjusting pin shaft and a tension spring. One end of the handle is in an irregular arc, and is provided with helical tooth gear teeth which are ranged on the irregular arc. The inner side of the twist head is provided with gear teeth in a V shape which is in 100 DEG to 135 DEG. The outer shape of the outer side is in an arch. The front angles of all teeth are 35 DEG, and the back angles are 55 DEG in optimal.

Description

Pipe twist

The utility model relates to a kind of hand-operated tools class, is rotating pipe vice, is specially adapted to rotating cylindrical class workpiece.

The existing general opening aperture of pipe wrench is regulated with nut-screw, and opening changes little, regulates inconvenience, and stubborn 2 contacts of workpiece of plate are easily skidded, complex structure, are difficult to make.Existing pipe wrench also has 3 contact self-locking and self-adjusting formulas, it has certain advantage, also have weak point, its binding clip and pincers are bearing pin in succession, and are near the sector rack center of circle near clamping, self-locking performance is good, but the opening aperture is very little, and bearing pin is far away the sector center of circle from pincers, and the opening aperture is big, self-locking performance is poor, easily skids.No matter 2 contacts or 3 contact teeth are all more sharp-pointed, during interlock surface of the work all there is certain damage.

The purpose of this utility model is to avoid above-mentioned the deficiencies in the prior art part, and provide that a kind of opening is big, the self-regulated of opening aperture and simple shelves are transferred combination, 3 contact, clamping all size workpiece carries out in best self-locking state, non-slip, do not have sharp keen pointed tooth, do not damage surface of the work, convenient and flexible operation, pipe vice simple in structure, in light weight, portable.

The utility model is to realize like this, its handle one end is with the plastic cement grip, the other end has to be is arranging the helical teeth teeth on the irregular arc, with the adjustable bearing pin of oblate rotation, with upper grip head one in three holes in handle arc teeth home position groove in succession, it is V-shaped that the upper grip head inboard has teeth, is 100 °-135 °.Outside profile is arch; One extension spring is pulled between handle and the binding clip.Pincers handle irregular arc is R20-R100, and to transfer Kongzuis be 20mm-100mm near the arc tooth top to three shelves in the groove, is 5mm-35mm near the arc tooth center of circle.Square is 10mm-30mm between three shelves accent holes, and the arc helical teeth is benchmark with the lateral plane, and gradient is 3 °-8 °.The tooth of upper jaw and lower jaw with anterior angle be 35 ° of relief angles be 55 ° for good.It is one grade by several calibers during use.Shelves are transferred workpiece are placed jaw, and to the binding clip opening direction firmly, V-arrangement jaw and arc caliper are self-regulated locking, make between workpiece and jaw relative displacement to occur on handle.Gently to realizing release once lifting in the other direction.The extension spring that connects between binding clip, the handle does not in use break away from surface of the work all the time, thereby has realized easily screwing continuously.Be in closure state at operating position lower jaw not.

Structure of the present utility model has realized self-regulated and shelves accent dual regulation, has guaranteed that reasonably self-locking performance is good non-slip, has also increased the opening aperture simultaneously.The utility model has four kinds of specifications can replace old-fashioned nine kinds of specifications, the clamping interlock can both make applied moment act on the workpiece on the maximum opening of jaw and any position between minimum aperture, make it to revolve tighter and tighter clockwise can bring into play moment torsion to greatest extent, when counterclockwise gently plate revolve immediately and loosen, realized pulling continuously revolving, increased flexibility, the reliability of pipe wrench greatly.Arc-shaped rack helical teeth and V-arrangement upper jaw crown are all not sharp, do not damage surface of the work under the firm non-slip preceding topic of self-locking.The binding clip outside is designed to arch, has reduced stress and has concentrated.Having guaranteed to have alleviated weight under the preceding topic of intensity, make it flexible operation, easy to carry.

The drawing of accompanying drawing is described as follows:

Fig. 1 is a structure chart of the present utility model

Wherein (1)---handle (2)---upper grip head (3)---irregular arc teeth center of circle, the adjustable bearing pin of oblate rotation (4)---extension spring (5)---plastic cement grip O ' handle (1) upper end.

Below in conjunction with accompanying drawing provide according to the utility model proposes embodiment:

Pipe vice by handle (1), upper grip head (2), oblate rotation is adjustable, and bearing pin (3) 3 extension springs (4) 4 plastic cement grips (5) are formed.As shown in Figure 1.Handle (1) one end has plastic cement grip (5), one end has is arranging the helical teeth teeth on irregular arc, with the adjustable bearing pin of oblate rotation (3), in succession in the O location groove of handle (1) the arc teeth center of circle on second hole in three holes, it is 115 ° that binding clip has teeth V-shaped with upper grip head.One extension spring, one end is fixed on handle (1) and locates, the other end is fixed on upper grip head (2) and locates, and the irregular arc arc of pincers handle E place is R65mm for the R25mmF place, and square is 12mm between interior three holes of handle (1) arc teeth center of circle O ' location groove, bit teeth anterior angle is 35 °, and relief angle is 55 °.With 50 chromium manganese hot investment castings, charcoal is oozed in tooth portion, quenches.The self-regulated of the utility model jaw opening aperture is transferred with shelves and is combined, but four kinds of specification pipe vice clamping 5mm-150mm steel pipes.

Claims

1, a kind of pipe wrench, it is made up of handle, upper grip head, oblate bearing pin extension spring and plastic cement grip, it is characterized in that: its handle one end has to be is arranging the helical teeth teeth on the irregular arc, with the adjustable bearing pin of oblate rotation.With upper grip head one in three holes in handle arc teeth home position groove in succession, it is V-shaped that upper grip head has teeth, and an extension spring is pulled between handle and the binding clip, and the irregular arc of pincers handle is R20mm-R100mm, the arc helical teeth is benchmark with the lateral plane, and gradient is 3 °-8 °.

2, according to the described pipe wrench of claim 1, it is characterized in that: the inboard teeth of its upper grip head are V-shaped to be 100 °-135 °, and outside profile is arch.

3, according to the described pipe wrench of claim 1, it is characterized in that: square is 10mm-30mm between interior three holes of handle arc teeth home position groove.

4, according to the described pipe wrench of claim 1, it is characterized in that: its bit rake angle is 35 °, and it is good that relief angle is 55 °.

5, according to the described pipe wrench of claim 1, it is characterized in that: its upper grip head and caliper are with 50 chromium manganese hot investment castings, and charcoal is oozed in tooth portion, quench.