CN2246045Y - Pipe tongs - Google Patents

Abstract

The utility model provides a pair of pipe tongs which has the advantages of convenient operation by single hand, flexible switching, fast operation, time saving, three points for clamping and locking a workpiece, uniform stress on the workpiece, small damage to the surface of the workpiece, labor-saving pulling, firm clamping and locking, simple structure, light weight and portability. The utility model is composed of an upper tong head, a tooth block, a lower tong body, a pin shaft, a tension spring and screws. The outer side of the pin hole of the upper tong head is provided with a small pressing handle A. The tooth block whose arced surface is provided with teeth is arranged between the upper tong head and the lower tong body, and is inlaid in a slot on the upper end of the lower tong body. The length the arc R of the tooth top of the tooth block is 30 mm to 90 mm. The upper tong head and the lower tong body are connected by a pin shaft hole G which uses the center F of the tooth arc of the top of the tooth block as center; the distance between the pin shaft hole G and the center F of the tooth arc is 15 mm to 55 mm. A V-shaped upper tong head whose inner side is provided with teeth is formed moves on the arc of eccentric teeth.

Description

A kind of pipe vice

The utility model relates to a kind of hand-operated tools class of stinging locking of pressing from both sides, and is specially adapted to twist column workpiece, as water supply pipe.

Existing pipe vice adopts is screw, the folding of screw mandrel fit adjustment and carry out work.Need during work repeatedly to regulate screw according to the workpiece size, time-consuming, effort, and to sting locking because of existing pipe clamp be 2 contact workpieces, stressed inequality is relatively skidded easily, the damage surface of the work.Existing pipe vice also has 3 contact workpieces, has advantage that weak point is also arranged, and its folding needs to hold the pincers handle with one, and the another hand pulls open upper grip head and regulates.Its lower clamp and arc teeth are one, are difficult for making teeth partly to process best hardness and intensity.The intensity and the hardness of teeth part are not enough, and folder easily skids poor reliability when stinging the locking workpiece.

The purpose of this utility model is to avoid the weak point on the above-mentioned prior art and provides a kind of one-handed performance easily, folding to save time flexibly, fast, and 3 folders are stung the locking workpiece; The workpiece mean forced seldom damages the workpiece appearance, pull laborsaving, the folder sting locking firm, simple in structure, in light weight, be convenient to work, portable pipe vice.

The utility model is to realize like this.It is one little of A that its upper grip head pin shaft hole outside has, and presses parallelly with upper grip head pin shaft hole center line B the last plane of A for a short time, and the upper grip head inner portion is V-shaped to be 110 °～128 °.The inboard teeth of arranging of V-arrangement, an end of an extension spring is screwed at the C place of lower clamp spring groove, and the other end is enclosed within the inboard tension spring hook D of upper grip head place.The block teeth that have teeth between upper grip head and lower clamp on the arcwall face are set in the groove of lower clamp upper end, there is a hole at lower clamp E place, with screw block teeth are fixed in the lower clamp upper end slot, the tooth top place camber line of block teeth is R30mm～R90mm, center F with place, block teeth top sector line is the center, the pin shaft hole G that connects upper grip head and lower clamp is 15mm～55mm apart from sector line center F, the upper grip head activity that has formed the inboard arrangement of V-arrangement teeth is on eccentric sector line, increased self-locking performance, it is very firm that folder is stung the locking workpiece, during work, hold the pipe vice handle toward next pressure, just can press from both sides and sting the locking workpiece, one lift and to unclamp gently, because the effect of extension spring is not escaped workpiece on binding clip V-arrangement teeth and block teeth cambered surface crown, thereby the stubborn stubborn effect of sour jujube that reaches of continuous slab.

Structure of the present utility model has guaranteed the folding with convenience of jaw, convenient power-saving, save time, it is firm that folder is stung the locking workpiece, it is rapid to break away from workpiece, one-hand operation when the little design by handle A of upper grip head makes work, the block teeth that arcwall face has teeth are set in the hole at lower clamp E place in the groove of lower clamp upper end and inlay block teeth solidly the structural design that block teeth are fixed in the groove with screw, firm attractive in appearance again, the teeth piece of rapid wear is made with the higher gears steel, the optimal hardness and the intensity of teeth have been guaranteed, being the center pin shaft hole G that connects upper grip head and lower clamp with the sector line F of block teeth top place has promptly guaranteed rationally that apart from the eccentric size design at sector line center the folding amount has guaranteed that greatly again folder stings that to lock workpiece firm, pipe vice of the present utility model can both be acted on applied moment on the workpiece on any position between maximum opening and the minimum aperture to greatest extent, during work with thumb once little of the A upper grip head is opened by upper grip head, holding the pincers handle presses just workpiece firmly to be pressed from both sides to next and stings locking, one lift and to unclamp gently, with thumb once by little by breaking away from workpiece to A, fast and flexible, convenient, save time, laborsaving, simultaneously also increase reliability, improved work efficiency greatly.

The picture of accompanying drawing is described as follows:

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

Fig. 2 is the utility model block teeth and lower clamp structure chart

Among Fig. 1

1-upper grip head

2-block teeth

3-lower clamp

4-bearing pin

5-extension spring

6-screw

7-screw

＜A〉the little handle of pressing in the upper grip head outside

＜B〉upper grip head lower clamp pin shaft hole center line

＜C〉extension spring one end is fixed on lower clamp spring groove place

＜D〉the extension spring other end is enclosed within the inboard tension spring hook of upper grip head

Among Fig. 2

＜E〉the fixing screw hole of block teeth in the lower clamp groove

＜F〉central point of block teeth top place sector line

＜G〉connect the pin shaft hole of upper grip head and lower clamp

Provide according to the embodiment that the utility model proposes below in conjunction with accompanying drawing:

Pipe vice is made up of upper grip head 1, block teeth 2, lower clamp 3, bearing pin 4, extension spring 5, screw 6, screw 7, institute.As shown in Figure 1: upper grip head 1 outside have one little be parallel by its last plane of handle A with upper grip head 1 pin shaft hole center line B, it is that the block teeth 2 that have teeth on 121 ° of arcwall faces are set in the groove of lower clamp 3 upper ends that upper grip head 1 inner portion is arranged teeth V-shaped, block teeth 2 are fixing at lower clamp 3E place with screw 6, the tooth top camber line of block teeth 2 is R38mm, with the center F of block teeth top place sector line is that pin shaft hole that the center connects upper grip head 1 and lower clamp 3 is that an end of 20mm extension spring 5 is fixed on lower clamp 3C place with screw 7 apart from sector line center F, the other end is enclosed within the little hook D place of upper grip head 1 inboard, and tension upper grip head 1 usefulness bearing pin 4 is connected upper grip head 1 with lower clamp 3.Upper grip head 1 lower clamp 3 usefulness 45# carbon steel precision castings form.Ooze charcoal after the close casting of block teeth 2 usefulness, 20 chromogens and quench, the utility model one hand can be operated, and 3 folders are stung the locking workpiece, and six kinds of specifications can be pressed from both sides the column workpiece of stinging locking Φ 6～Φ 160mm.

Claims (3)

1. pipe vice, it is made up of upper grip head, block teeth, lower clamp, bearing pin, extension spring and screw, it is characterized in that: there is a little handle A that presses in its upper grip head pin shaft hole outside, the block teeth that have teeth between its upper grip head and the lower clamp on the arcwall face are set in the groove of lower clamp upper end, there is a hole at lower clamp E place, with screw block teeth are fixed in the groove, the tooth top place camber line of block teeth is that the center F that R30mm-R90mm locates the sector line with the block teeth top is the center, and the pin shaft hole G that links upper grip head and lower clamp is 15mm-55mm apart from sector line center F.

2. according to the described pipe vice of claim 1, it is characterized in that: the little last plane of handle A of pressing in its upper grip head pin shaft hole outside is parallel with upper grip head pin shaft hole center line B.

3. according to the described pipe vice of claim 1, it is characterized in that: its V-arrangement is inboard arranges the upper grip head activity of teeth on eccentric sector line.

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