CN1342546A - Pipe wrench - Google Patents

Abstract

A pipe wrench is composed of upper wrench jaw, wound lower body, toothed arc block, spring protecting plate, tension spring, oil-line pin and screw. A toothed block whose top has two arc dimensions is inlaid in the slot of lower wrench body. It features the reasonable fitting between the eccentrical distance from center of arc tooth to link hole and from top of arc tooth to link hole, resulting in reliable clamping to workpiece and enlarged openess of movable jaw.

Description

A kind of pipe vice

The present invention relates to a kind of hand-operated tools class of locking mounting board, be specially adapted to the workpiece of switching cylinder class, as water supply pipe.

Existing pipe vice adopts screw and the folding of screw mandrel fit adjustment jaw, needs constantly to regulate folding according to workpiece time-consuming, effort during work; Because the jaw mounting board workpiece of existing pipe vice is 2 contact workpieces, the stressed inequality of workpiece, easily skid, easily hinder surface of the work, it is 3 contact workpieces that existing pipe vice also has jaw, but because upper grip head is unreasonable with the distance design of bearing pin connecting hole with the arc center of lower clamp teeth, in succession the arc teeth of hole and lower clamp push up unreasonable apart from designing, make the pipe vice opening aperture of existing 3 contact workpieces of jaw not reach need of work, brought inconvenience to work.

The objective of the invention is to avoid the weak point on the above-mentioned prior art, and provide a kind of arc tooth center to cooperate rationally with the connecting hole eccentric distance with connecting hole, arc tooth top, adapt to need of work, the folding jaw is big relatively, the locking workpiece is firm, quick locking workpiece breaks away from workpiece, time saving and energy saving, as to be easy to work pipe vice fast.

In order to achieve the above object, pipe vice upper grip head inner portion of the present invention is arranged the teeth forming V-shape, be 110 °～125 ° and insert the lower clamp join, inserting upper grip head with bearing pin carries out among the connecting hole A that is connected with lower clamp, the teeth piece that top is made up of two kinds of camber line sizes is set among the groove B of lower clamp, the distance of the top horizontal line P of arc teeth piece and the central horizontal line O of connecting hole A is 2mm～50mm, first camber line C point on the arc teeth piece～D scratch start bank degree is R30mm～120mm, and second arc that is connected with first arc is R20mm～90mm from D point～E scratch start bank degree.The extension line S that the central point F of first camber line of teeth piece is vertical and the center line O of connecting hole A distance be 8mm～65mm, and the distance of the central vertical extension line Q of the horizontal and connecting hole A of the central point F of first camber line of teeth piece is 10mm～43mm.The vertical extension line Z of central point m that second camber line that is connected with first camber line on the teeth piece ordered from D point～E, with the distance of the center line O of connecting hole A be 28mm～33mm, second camber line that is connected with first camber line is 16mm～62mm from center m transverse horizontal line N that D point～E is ordered and the distance of connecting hole A central vertical extension line Q.The distance of the center line O of upper grip head horizontal center line G and connecting hole A is 26mm～58mm.Extension spring one end that oily line is contained at center is fixed on the H place of upper grip head, colludes U place in the spring groove that the other end is fixed on lower clamp, and one protects spring plank is fixed by bolts to lower clamp U place.Because that the setting size of the connecting hole A at above-mentioned relatively sector center is connected with two sectors on lower clamp teeth piece top, cooperation is reasonable, make the present invention not only firmly the self-locking mounting board live workpiece, also strengthened simultaneously the aperture of jaw, as long as gently once pulling the little of upper grip head, be placed on the workpiece by jaw is opened fast; Press handle to next, jaw just firmly mounting board pin workpiece; Handle pressure is big more, and the jaw mounting board is locked tightly more; The handle of raising one's hand is removed mounting board locking at once gently, has not only strengthened the fixing of the mounting board locking workpiece of pipe vice, has also increased aperture, is easy to work.

The horizontal line O of structure connecting hole A of the present invention and arc tooth piece top, the center of connecting hole A is reasonable in design apart from size with cooperating of arc sector center, has not only guaranteed the reliability of mounting board locking workpiece, has also strengthened the opening aperture of pipe vice simultaneously.The teeth of damaging partly adopt the steel alloy manufacturing easily, have increased the reliability and the service life of using, and spring plank is protected in the extension spring in the lower clamp spring groove outward, and protection prevents the injured damage of extension spring; Be provided with the damage that prevents to get rusty of oily line in the spring, increased the service life of extension spring, make extension spring keep good pulling force, workpiece is not escaped in upper jaw and following block teeth, make a kind of pipe vice of the present invention can both applied force be acted on the workpiece fully firmly mounting board pinning of workpiece by handle in any position between maximum opening and the minimum aperture.Press little of handle on the binding clip during work gently, jaw just opens fast, is placed on the workpiece, one presses handle, jaw automatically with workpiece firmly mounting board pin, the work handle of raising one's hand that finishes is gently removed the mounting board locking state immediately, fast and flexible, convenient and reliable, time saving and energy saving, improved work efficiency.

The drawing of accompanying drawing is described as follows:

Fig. 1 is a structure chart of the present invention;

Fig. 2 is partial structurtes figure of the present invention;

Among Fig. 1: (1) upper grip head; (2) lower clamp; (3) arc teeth piece; (4) protect spring plank; (5) extension spring; (6) oily line; (7) bearing pin; (8) screw;

Among Fig. 2: (A) upper grip head and lower clamp connecting hole; (B) groove of lower clamp edge arc teeth piece; (P) the top horizontal line of arc teeth piece; (O) the central horizontal line of connecting hole A; (C point～D point) first camber line of arc teeth piece; Second camber line that (D point～E point) is connected with first camber line; (F) first arc centers point on the teeth piece; (S) the vertical extension line of first arc centers point on the teeth piece; (Q) extension line of connecting hole central vertical; (m) second arc centers point on the teeth piece; (N) second arc centers point transverse horizontal line on the teeth piece; (G) upper grip head horizontal center line;

Provide the embodiment that proposes according to the present invention below in conjunction with accompanying drawing: pipe vice is by (1) upper grip head; (2) lower clamp; (3) arc teeth piece; (4) protect spring plank; (5) extension spring; (6) oily line; (7) bearing pin; (8) bolt is formed; Shown in figure one: upper grip head portion arranges the inboard that teeth are V-shaped to be 115 ° and to insert the lower clamp joins, inserts to carry out among upper grip head and the lower clamp connecting hole A with bearing pin to be connected; The teeth piece that top is made up of two kinds of camber line sizes is set among the groove B of lower clamp, the top horizontal line P of arc block teeth is 27mm with the distance of the central horizontal line O of hole A in succession, first camber line on the arc teeth piece is R23mm from C point～D scratch start bank degree, the central point F of first camber line of teeth piece vertically upward extension line S and the O distance of the center line of connecting hole A be 9mm, the central point F of first camber line of teeth piece laterally and the distance of the central vertical extension line Q of connecting hole A be 16mm, second camber line that is connected with first camber line is 3mm from the distance of the center line O of vertical extension line Z of center m that D point～E is ordered and connecting hole A, second camber line that is connected with first camber line is 18mm from center m transverse horizontal line N that D point～E is ordered and the distance of connecting hole A central vertical extension line Q, and the center line O distance of upper grip head horizontal center line G and connecting hole A is 28mm; Extension spring one end that oily line is contained at the center is screwed the spring groove U place that on upper grip head H goes out the to collude other end is fixed on lower clamp, protects spring plank and is screwed at lower clamp U place; Because the center of the horizontal line O of above-mentioned connecting hole A and arc teeth piece top, connecting hole A is reasonable in design apart from size with cooperating of the center of arc sector, guaranteed that not only mounting board locking workpiece is reliable, also strengthened simultaneously the aperture of pipe vice, it is that 20 chromium forge or the hot investment casting moulding local machined after-baking that upper clamp adopts material; Lower clamp block teeth material is 60 silicomanganese molybdenum alloy steel, forges or the hot investment casting moulding Quenching Treatment after the mechanical process.The relative folding amount of fast pipe twist of the present invention is big, and the locking workpiece is firm, and locking fast, disengaging workpiece are time saving and energy saving, are easy to work.

Claims (2)

1 one kinds of pipe vices are by (1) upper grip head; (2) lower clamp; (3) arc teeth piece; (4) protect spring plank; (5) extension spring oil line; (6) bearing pin; (7) screw; Form; It is characterized in that: the teeth piece that its top is made up of two kinds of camber line sizes is set among the groove B of lower clamp, the distance of the top horizontal line P of arc tooth piece and the central horizontal line O of connecting hole A is 20mm～50mm, first camber line on the arc teeth piece is from C point～D point, second arc that is connected with first arc is from D point～E point, the extension line that the central point F of first camber line of teeth piece is vertical and the center line O of connecting hole A distance be 8mm～65mm, and the distance of the extension line Q of the central vertical of the horizontal and connecting hole A of the central point F of first camber line of teeth piece is 10mm～43mm.Vertical extension line of central point m that second camber line that the teeth piece is connected with first camber line ordered from D point～E and the center line O of connecting hole A distance are 2mm～33mm, and second camber line that is connected with first camber line is 16mm～62mm from center m transverse horizontal line N that D point～E is ordered and the distance of connecting hole central vertical extension line Q.The distance of the center line O of upper grip head horizontal line G and connecting hole A is 26mm～58mm.

2 is according to claim 1, and a kind of pipe vice is characterized in that: first arc on the arc teeth piece is R30MM～120MM from C point～D scratch start bank degree, and second arc that is connected with first arc is from D point～E point, and the camber line radian is R20MM～90MM.

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