CN2706278Y

CN2706278Y - Powerful tongs

Info

Publication number: CN2706278Y
Application number: CN 200320112717
Authority: CN
Inventors: 钟伟华
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-14
Filing date: 2003-11-14
Publication date: 2005-06-29
Anticipated expiration: 2013-11-14

Abstract

The utility model discloses powerful pliers for directly clamping work pieces with different sizes, comprising clamping components, regulating components, holding components, and loosening components. Toothed blocks 15 are fixedly connected between working blocks; the other end of a supporting rod 7 is positioned between working blocks 20 and is movably connected with a large handle 19; the toothed body of the toothed rack 13 is positioned inside a cavity which is formed from the combination of the supporting rod 7, the toothed blocks 15, and the working blocks 20; the corresponding face of the toothed rack 13 and the corresponding face of the toothed block 15 are provided with teeth. The powerful pliers comprise acting components for gathering the two heads of the pliers during non engagement of the teeth of the toothed rack 13 and the teeth of the toothed blocks 15; the end connected between the supporting rod 7 and the large handle can make the toothed rack 13 engaged with the toothed block 15 with the one combined angle of the supporting rod 7 and the toothed rack 13 from 5 degrees to 40 degrees until the powerful pliers are self locked. The utility model can directly clamp work pieces with the different sizes and have convenient use.

Description

A kind of locking pliers

Technical field

The utility model relates to a kind of locking pliers, belongs to the Hardware pliers class.

Background technology

It is big and the advantage of self-lock ability is arranged that locking pliers has clamping force, thereby become a kind of utility.Existing locking pliers is that the tail end at its pincers handle is provided with internal thread, regulates bolt and screw-internal thread fit, the advancing and go out of swivel bolt, regulate the size of jaw, the workpiece so that jaw size is closed, it is dumb to regulate operation, all will carry out minimum adjusting once to the workpiece of different size.For example the practical new patent specification of the China of a CN2414881Y who announces existing January 17 calendar year 2001 discloses a kind of like this locking pliers, and the size of jaw is regulated in advancing and going out of rotation adjusting bolt.

Summary of the invention

The purpose of this utility model provides a kind of locking pliers, can folder different size workpiece the time directly workpiece is carried out clamping.When having removed existing clamp different size workpiece energetically from, all to be rotated the operation of advancing and come out to regulate pincers of transferring bolt.

For achieving the above object, the utility model by the following technical solutions: clamping part by decide binding clip, live binding clip and extension spring form; Regulating parts is made up of tooth piece, tooth bar, operation block, strut; Clamping and loose part be by big handle, miniature lever, and fork, loosening bar and torsion spring are formed.Decide binding clip and fixedly connected with miniature lever, live binding clip and miniature lever flexibly connect.The tooth piece places between two operation block, and fixedlys connected with operation block.Strut one end and miniature lever flexibly connect, and the other end places between the operation block, and is movably connected in together on the big handle.Tooth bar flexibly connects with the binding clip of living.The tooth body of tooth bar places in the cavity that strut, tooth piece and operation block surrounded.The end of tooth bar has projection.On the tooth bar face that mutual energy contacts with tooth piece phase tooth is arranged all.Fork one end and miniature lever flexibly connect, and the other end flexibly connects with big handle.Described locking pliers also comprises the functional component that a tooth at tooth bar and tooth piece can make two binding clips close up when not having interlock, also both described extension spring.Loosening bar is fixedly connected on the strut by rivet and torsion spring, and the part upper surface of its outside contacts with tooth bar when the locking pliers clamping work pieces.Strut and movable this end that links of big handle can make the tooth of tooth bar and tooth piece begin to be interlocked when strut and tooth bar angle are a angle in 5 ° to the 40 ° scopes, up to the pinning certainly of described locking pliers.

Because adopt such scheme, the utility model has been realized the direct clamping to the workpiece of different size.Easy to use.Removed the size that when folder different size workpiece, must regulate jaw earlier from, and the utility model has also kept big and the advantage that can self-locking of existing locking pliers clamping force.

Description of drawings

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

Accompanying drawing 1. is front views of the present utility model

Accompanying drawing 2. is vertical views of accompanying drawing 1

Accompanying drawing 3. is structure charts of the present utility model

Accompanying drawing 4. is A-A line cutaway views of accompanying drawing 1

Accompanying drawing 5. is that the utility model is regulated part

Accompanying drawing 6. is the utility model design sketch when clamping workpiece

Among the figure: 1. decide binding clip 2. rivets 3. rivets 4. rivets 5. extension springs 6. miniature levers 7. struts 8. rivets 9. loosening bar 10. rivets 11. big handle 12. projections 13. tooth bars 14. rivets 15. tooth pieces 16. rivets 17. rivets 18. rivets 19. binding clip 20. operation block 21. forks 22. rivets 23. torsion springs alive.

The specific embodiment

Accompanying drawing 1 and accompanying drawing 2 illustrate fork 21 and are hinged on the miniature lever 6 by rivet 3, and its other end is hinged on the big handle 11 by rivet 22.Connecting has like this given big handle 6 one moving fulcrums.

Accompanying drawing 2 illustrates big handle a U font breach.

Accompanying drawing 3 is structure charts of the present utility model, illustrates, and decides binding clip 1 and is fixed on the miniature lever 6 by rivet 2 and 4.On the miniature lever 6 open slot is arranged.The binding clip 19 of living is hinged on by rivet 3 on the open slot inboard of miniature lever 6, and the rotation of the binding clip 19 of living (producing opening and closing between two jaws changes) is driven by tooth bar 13.Tooth piece 15 is fixed between two operation block 20 by two rivets 14, uses three rivets or more how good certainly, then at least two of

operation block

15,15 at least one of tooth piece.One end of strut 7 is hinged on the open slot side of miniature lever 6 by rivet 8, and the other end of strut 7 places between the operation block 20 and be hinged on by rivet 16 together with operation block 20 on the U-shaped breach inboard of big handle 11 (as accompanying drawing 4).Tooth bar 13 places in the notch of binding clip 19 alive, and is hinged on the binding clip 19 alive by rivet 17.The tooth body of tooth bar 13 places in the cavity that is surrounded by strut 7, tooth piece 15 and operation block 20.On the relative face of tooth bar 13 and tooth piece 15 tooth is arranged all.The end of tooth bar 13 is with at least one projection 12, and it act as and makes tooth bar 13 be difficult for skidding off in the cavity that tooth piece 15 and operation block 20 are surrounded from by strut 7.In the process of holding workpiece, this end that described strut 7 is connected with big handle 11 can be interlocked the tooth of tooth bar 13 and tooth piece 15 to tooth piece 15 on tooth bar 13 tops when 13 one-tenths angles of strut 7 and tooth bar are angle in 5 ° to the 40 ° scopes, up to locking pliers pinning certainly.Extension spring 5 is connected between binding clip 19 alive and the miniature lever 6, the functional component that described extension spring can make two binding clips close up when also can not have interlock by other tooth at tooth bar 13 and tooth piece 15 replaces, as torsion spring, two curved booms of torsion spring are acted on respectively on binding clip 19 alive and the miniature lever 6, perhaps other spring, can also on tooth bar 13, add mill sassafras sheet, when making operation block 20, produce certain mill sassafras power and drive tooth bar 13, two binding clips are closed up with tooth bar 13 relative motions.Loosening bar 9 is fixedly connected on the strut by rivet 10 and torsion spring 23, and the part upper surface of its outer edge can contact with tooth bar 13 when the locking pliers clamping work pieces.

Accompanying drawing 5 illustrates adjusting part of the present utility model.

This end that strut 7 and big handle 11 link, but its profile equation can be

Other is of a size of: a=0.005 b=0.013

It also can be, this end that strut 7 and big handle 11 link, but its profile equation can be

Other is of a size of: a=0.006 b=0.013

In following formula: r, θ are that point on the profile is to the corner of the distance and this point in the axle center of rivet 16

A is that the nodel line of tooth of tooth bar 13 is to the distance of another side

B is the distance of the nodel line of tooth piece 15 teeth to the axle center of rivet 16

(unit of r, θ, a, b is a rice)

Certainly this regulates part, can also there be many forms to adopt, as long as tooth bar 13 can be pushed up to tooth piece 15 during angle in 13 one-tenths angles of strut 7 and tooth bar are 5 ° to 40 ° scopes of this end that strut 7 is connected with big handle 11 tooth of tooth bar 13 and tooth piece 15 is interlocked, up to locking pliers pinning certainly.

Below more in conjunction with the accompanying drawings 3, operation principle of the present utility model is described.During the folder workpiece workpiece is put to jaw.Close up two handles, owing to there are extension spring 5 effects to make binding clip 19 alive gently clamp workpiece.Continue to close up two handles, this moment is because rivet 16 is relative with the position of rivet 17 when static, and the tooth of tooth bar 13 and tooth piece 15 do not have interlock, and the rivet 16 on the strut 7 just can edge tooth bar 13 and moved to rivet 17 directions.Amount of movement increases and increases along with workpiece size.When strut 7 became angle in 5 ° to the 40 ° scopes with tooth bar 13 angles, the tooth of tooth bar 13 and tooth piece 15 began interlock.Tooth piece 15, operation block 20 and tooth bar 13 can be regarded one as afterwards.Continue to close up size grip afterwards, then its action principle is identical with existing locking pliers, and its exercising result as shown in Figure 6.Thereby realize the direct clamping of different size workpiece, and it is big and self-lock ability arranged to have chucking power.

Claims

1. a locking pliers is made up of clamping part, adjusting parts and clamping and loose part, decides binding clip and fixedlys connected with miniature lever, and live binding clip and miniature lever flexibly connect, and it is characterized in that: tooth piece (15) is fixedly connected between the operation block (20); Described strut (7) one ends place between the operation block (20), and together are movably connected on the big handle (11); The tooth body of tooth bar (13) places in the cavity that is surrounded by strut (7), tooth piece (15) and operation block (20); On tooth bar (13) and tooth piece (15) opposite face tooth is arranged all; Include the functional component that when the tooth of tooth bar (13) and tooth piece (15) does not have interlock, two binding clips are closed up on described a kind of locking pliers; This end that described strut (7) is connected with big handle (11) can make the tooth of tooth bar (13) and tooth piece (15) be interlocked when strut (7) becomes angle to be angle in 5 ° to the 40 ° scopes with tooth bar (13), up to oneself pinning of locking pliers.

2. a kind of locking pliers according to claim 1 is characterized in that: described strut (7) other end and miniature lever (6) flexibly connect.

3. a kind of locking pliers according to claim 1 is characterized in that: tooth piece (15) has one at least.

4. a kind of locking pliers according to claim 1 is characterized in that: fork (21) one ends and miniature lever (6) flexibly connect, and the other end flexibly connects with big handle (11).

5. a kind of locking pliers according to claim 1 is characterized in that: the end band projection (12) of tooth bar (13).

6. a kind of locking pliers according to claim 5 is characterized in that: projection (12) has one at least.

7. a kind of locking pliers according to claim 1 is characterized in that: tooth bar (13) flexibly connects with the binding clip (19) of living.

8. a kind of locking pliers according to claim 1 is characterized in that: described functional component is extension spring (5), and described extension spring (5) is connected between binding clip alive (19) and the miniature lever (6).

9. a kind of locking pliers according to claim 1 is characterized in that: described functional component is a torsion spring, and two curved booms of torsion spring act on respectively on binding clip alive (19) and the miniature lever (6).

10. a kind of locking pliers according to claim 1 is characterized in that: loosening bar (9) is fixedly connected on the strut (7) by rivet (10) and torsion spring (23), and the part upper surface of its outer edge can contact with tooth bar (13) when the locking pliers clamping work pieces.