CN2199015Y

CN2199015Y - Automatic centring grip wrench

Info

Publication number: CN2199015Y
Application number: CN 94236693
Authority: CN
Inventors: 曹康乾
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-17
Filing date: 1994-06-17
Publication date: 1995-05-31
Anticipated expiration: 2004-06-17

Abstract

The utility model belongs to an automatic centering grip wrench which comprises a toothed moveable head and a toothed fixed head. The jaw fixed on the fixed head is an arc jaw; the moveable head connected with the fixed head can movably and relatively rotate through the handle of the moveable head and a cylindrical pin; the position of the cylindrical pin deviates from the center of a circle of the jaw of the fixed head to ensure that the distance between two jaws close to each other gradually according to the rotation of the handle till clamping; the purpose can be achieved when the moveable head and the fixed head rotate in an opposite direction for loosing. So the utility model has the advantages of large clamping force, simple structure, convenient use, convenient carrying, etc. and overcomes the defects of complex and unwieldy structure, inconvenient use, inconvenient carrying, etc.

Description

Automatic centring grip wrench

The utility model belongs to a kind of pipe vice in the machine tool, but particularly a kind of self-centering clamp, be suitable as the pipe vice of the installation and removal usefulness of all kinds of pipe fittings.

In industries such as machinery, chemical industry, building water supply and drainage, all need adopt pipe vice to carry out at present for the installation and removal of pipe fitting.Traditional pipe vice be by on the movable binding clip with nut sleeve cooperate with notch on being located at fixed pliers head or handle, with the folding of regulating jaw and clamp pipe fitting.This class pipe vice can only parallelly move with respect to deciding jaw owing to movable clamp port, can not self-centering, clamping work pieces, and when barrier being arranged or is in narrow positions around the workpiece, must unclamp the clamping again of jaw revolution certain angle behind the moving certain angle of revolution, can work on, therefore, this pipe vice has complex structure, heaviness, uses, carries disadvantages such as equal inconvenience.

But the purpose of this utility model is a kind of both self-centerings of design, can clamp and unclamp the pipe vice of jaw again automatically, to reach simple in structure, manipulates and purpose such as easy to carry.

Solution of the present utility model is still to establish a toothed movable binding clip and a fixed pliers head, and fixed pliers head and handle are rigidly connected, and key is that the jaw on the fixed pliers head is the circular arc jaw; The adjustable clamp headband has a binding clip handle and flexibly connects and can relatively rotate by this binding clip handle and straight pin and fixed pliers head; As the center of circle of the position deviation regular jaw of the straight pin of pivot, and preferably be located on the line between this center of circle and its upper jaw, enough big adjustable range and coupling mechanism force arranged to guarantee two spans of jaw.Both both can be said fixing binding clip and movable binding clip handle plank frame, also can be fork structure, but when fixed pliers head when being board-like, movable binding clip handle then is a V shape; And when fixed pliers head was V shape, it is board-like that movable binding clip handle can be, and flexibly connects by straight pin after both embed mutually again.

The utility model is owing to be designed to the circular arc jaw with regular jaw, and movable binding clip is by its pincers handle and fixed pliers head off-centre, flexible connection, and both can relatively rotate again.Therefore, when pipe fitting places between two jaws, as long as turning handle, because as the home position of the position deviation regular jaw of the straight pin of pivot, along with the rotation two jaws distance of handle more and more closely until clamping, because pipe fitting is under the effect of regular jaw, produce a counter-clockwise revolving force, this power drive activity binding clip is again rotated and the clamping of promotion workpiece to inhour, and big more its clamping force of reinforcing is also big more, until pipe fitting is tightened or unloads.If in environment stenosis operation, then when the pincers handle forwards the dead angle to,, fall back on repetitive operation again behind the initial position as long as must oppositely jaw can be unclamped once rotation, can achieve the goal.Therefore the utlity model has simple in structurely, chucking power is big, characteristics such as manipulates and easy to carry.

Accompanying drawing and description of drawings

Fig. 1, the utility model structure and user mode schematic diagram;

Fig. 2 is the vertical view of Fig. 1.

Among the figure: 1, handle, 2, fixed pliers head, 3, regular jaw, 4, pipe fitting (workpiece) 5, moving jaw, 6, movable binding clip, 7, movable binding clip handle, 8, straight pin, 9, movable binding clip handle groove.

Embodiment

Present embodiment is an example with the pipe fitting pipe vice that is used to install, dismantle φ 10～40mm diameter: fixed pliers head 2 adopts plank frames, and movable binding clip handle 7 adopts fork structure.Handle 1 fixed pliers head 2, movable binding clip 6 and binding clip handle 7 thereof all adopt 45 ^#Forging forms through fine finishining after causing type again.Two jaws are all established the serrated teeth mouth, movable binding clip and the thick 21mm of pincers handle thereof, the pincers handle groove 9 wide 9mm of being that offer, long 60mm, each thick 6mm of both sides handle, wide 20mm; Fixed pliers head 2 thick 8mm, the arc radius of its jaw 3 is 30mm, jaw is long to be the semicircle girth; The long 380mm of handle, thick 8mm, the wide 28mm in end, the wide 24mm in middle part, the center present embodiment of cylinder pin hole are located at the center of circle of regular jaw 3 and the mid point of upper jaw line, and diameter is φ 12mm.After the machine-shaping, movable binding clip 6 and pincers handle 7 thereof all are heat-treated in HRC40～45 scopes with fixed pliers head 2, do zinc-plated processing then.Straight pin 8 also adopts 45 ^#Steel, column part diameter are φ 12mm, and its surface hardening of long 25mm is handled to HRC40～45, movable riveted joint behind the pin-and-hole of insertion activity binding clip handle 7 and fixed pliers head 2.

Claims

1, the pipe vice of a kind of self-centering, clamping, comprise toothed movable binding clip of jaw and fixed pliers head, fixed pliers head and handle are rigidly connected, it is characterized in that the jaw on the fixed pliers head is the circular arc jaw: the adjustable clamp headband has a binding clip handle and flexibly connects and can relatively rotate by this binding clip handle and straight pin and fixed pliers head: as the center of circle of the position deviation regular jaw of the straight pin of pivot, and preferably be located on the line between this center of circle and its upper jaw.

2, by the pipe vice of the described self-centering of claim 1, clamping, both both can be plank frame to it is characterized in that fixed pliers head and movable binding clip handle, also can be fork structure; But when fixed pliers head when being board-like, movable binding clip handle then is a V shape; When fixed pliers head is V shape, movable binding clip handle then can be board-like.