CN201168940Y

CN201168940Y - Multifunctional self adaptable wrench

Info

Publication number: CN201168940Y
Application number: CNU2008200915284U
Authority: CN
Inventors: 刘凤翼; 刘凤羽
Original assignee: CHENZHEN ZIJINWANG TECHNOLOGY Co Ltd
Current assignee: CHENZHEN ZIJINWANG TECHNOLOGY Co Ltd
Priority date: 2008-01-08
Filing date: 2008-01-08
Publication date: 2008-12-24
Anticipated expiration: 2018-01-08

Abstract

The utility model provides a multifunctional self-tightening movable wrench, which relates to the technical field of mechanical tools, in particular to a multifunctional self-tightening movable wrench. The multifunctional self-tightening movable wrench comprises a hand handle, a worm, a fixed jaw and a movable jaw, and the multifunctional self-tightening movable wrench is characterized in that a wedge A is arranged on the fixed jaw, the clamping surface of the wedge A substitutes the clamping surface on the fixed jaw of the prior movable wrench; a wedge B is arranged on the movable jaw, the clamping surface of the wedge B substitutes the clamping surface on the movable jaw of the prior movable wrench, the two wedges and the two jaws are connected through a sliding groove and a sliding bar structure matched with the sliding groove in a sliding way, and the big and the small heads of the wedge A and the wedge B are arranged in an opposite way. The multifunctional self-tightening movable wrench has the advantages that the chamfer and the slipping can not occur when a hex nut is screwed, and repetitive take-out is not required, therefore, the multifunctional self-tightening movable wrench can substitute the pipe wrench to screw the tubular object and the nut of which the nut cap is damaged, and can be also acted as locking pliers, thereby the application range is very wide.

Description

Multi-functional self-tightening monkey wrench

Technical field

The utility model relates to a kind of machine tool technical field, is specifically related to a kind of multi-functional self-tightening monkey wrench aspect.

Technical background

Because it is to regulate by worm screw that two jaws of existing monkey wrench are pulled a mouthful size, when being subjected to very big stubborn power or pull mouth with clamping nut defective tightness, skidding will appear, unexpected skidding can injure user's hand, nut is after repeatedly skidding, circle can abrasion be pulled in the corner, so that can't turn, and is awkward more.Though back-up wrench is not prone to skidding, the nut that the use of back-up wrench is subjected to a model can only cooperate the restriction of corresponding back-up wrench.Existing monkey wrench can only be twisted hex nut, can't twist tube, and when limited space system, pull to need behind the certain angle to pull and mouthful take off, return again clamping again from nut, troublesome poeration, though pipe wrench can be twisted tube, volume heaviness, troublesome poeration, need two hands to transfer, just cannot use in the narrow space at all.

Summary of the invention

In sum, the purpose of this utility model is to propose a kind ofly not only can twist hex(agonal)screw, can also twist tube, and, can also use as the instrument of clamping article, realize the multi-functional self-tightening monkey wrench of single load bearing.

For realizing the purpose of this utility model, the technical scheme that adopts is: comprise handle, worm screw and pull mouth by what fixed jaw and movable jaw were formed, movable jaw slides along the two jaw arms of angle, it is characterized in that: on fixed jaw, be provided with voussoir A, voussoir A is provided with a voussoir A clamping face, voussoir A clamping face replaces the clamping face on the existing monkey wrench fixed jaw, between voussoir A and fixed jaw by chute and cooperate the draw runner structure to be connected; On movable jaw, be provided with voussoir B, voussoir B is provided with a voussoir B clamping face, voussoir B clamping face replaces the clamping face on the existing monkey wrench movable jaw, between voussoir B and movable jaw also the draw runner structure by chute and cooperation be connected, and the concentric reducer of voussoir A and voussoir B towards on the contrary.

Voussoir A major part on the described fixed jaw is towards two jaw arm of angle directions, and the microcephaly is towards pulling a mouthful direction; Voussoir B microcephaly on the described movable jaw is towards two jaw arm of angle directions, and major part is provided with the behaviour area of voussoir B towards pulling a mouthful direction between the voussoir B and the two jaw arms of angle, and the voussoir A clamping face and all vertical two jaw arms of angle of voussoir B clamping face.

Also be provided with an extension spring A between described fixed jaw and voussoir A, be provided with between described movable jaw and voussoir B one to voussoir B to pulling mouthful spring of direction applied thrust or a shell fragment.

As can also also being provided with an extension spring B to the further improvement of the utility model between described movable jaw and voussoir B, extension spring B can retract the position with the voussoir B that skids off.

Described voussoir A clamping face is equipped with latch on the voussoir B clamping face.

Described voussoir A clamping face is provided with the latch that crown is partial to two jaw arm of angle directions, and described voussoir B clamping face is provided with the crown deflection and pulls the latch of mouthful direction.

The surface of the draw runner structure of described chute and cooperation is provided with the little smooth material layer of one deck coefficient of friction or forms the little even surface of coefficient of friction by sanding and polishing.

As to the further more improved wherein a kind of scheme of the utility model being: described fixed jaw is provided with the fixed jaw chute, be provided with the prevention groove at fixed jaw chute root, voussoir A is located in the fixed jaw chute, the protruding block that on voussoir A and the contacted even surface A of fixed jaw chute, is provided with and stops groove to match and slide, be provided with a qualification chute A parallel with the even surface A of voussoir A in voussoir A side, in limiting chute A, limit bar A near being provided with one on the end of pulling mouth, limiting bar A is fixed on the fixed jaw runner wall, fixedly also be provided with the extension spring cavity on the volume, be provided with an extension spring in the extension spring cavity and connect voussoir A and fixed jaw; Described movable jaw is provided with the movable jaw chute, voussoir B is located in the movable jaw chute, the side of voussoir B is provided with a parallel plane qualification chute B relative with voussoir B clamping face, an end that limits the close two jaw arms of angle in the chute B is provided with one and limits bar B, between the other end that limits chute and qualification bar B, be provided with a compression spring, limit bar B and be fixed on the movable jaw runner wall.

As to the further more improved another kind of scheme of the utility model being: described fixed jaw is provided with the fixed jaw chute, be provided with the prevention groove at fixed jaw chute root, voussoir A is located in the fixed jaw chute, the protruding block that on voussoir A and the contacted even surface A of fixed jaw chute, is provided with and stops groove to match and slide, be provided with a qualification chute A parallel with the even surface A of voussoir A in voussoir A side, in limiting chute A, limit bar A near being provided with one on the end of pulling mouth, limiting bar A is fixed on the fixed jaw runner wall, fixedly also be provided with the extension spring cavity on the volume, be provided with an extension spring in the extension spring cavity and connect voussoir A and fixed jaw; Described movable jaw is provided with a movable jaw chute, the face that voussoir B contacts with movable jaw is provided with the protruding draw runner that matches with the movable jaw chute, the projection draw runner is located in the movable jaw chute, in the movable jaw chute, be provided with an energy to voussoir B to pulling the shell fragment that mouthful direction applies elastic force, in the movable jaw chute, establish extension spring B in addition, extension spring B one end is fixed on the movable jaw, on the other end connection bump draw runner, establish one in the side of protruding draw runner and limit chute B, establish one at the middle part that limits chute B and limit bar B, the two ends that limit bar B are located on the movable jaw runner wall.

Described movable jaw be provided with one with limit an end corresponding lock hole of chute B near the two jaw arms of angle, when inserting securing rod in lock hole, chute B is locked, can't slide to opening direction.

Describedly on the angle limit of fixed jaw and movable jaw, be provided with latch.

The beneficial effects of the utility model: the utility model is when forward pulling, because voussoir A clamping face is provided with the latch that crown is partial to two jaw arm of angle directions, voussoir B clamping face is provided with the crown deflection and pulls the latch of mouthful direction, increased the frictional force between voussoir and gripping object, and voussoir A, B and fixed jaw, be provided with the little smooth material layer of coefficient of friction between movable jaw again, so voussoir A will slide to pulling mouthful direction, voussoir B will slide to two jaw arm of angle directions, makes that pulling mouth reduces, and the power of pulling is big more, hold tight more with gripping object, skidding can not appear, and, can also twist tube, replace existing pipe wrench, when reverse pulling, voussoir A, B moves round about, pulls mouth and magnifies, pull mouthful and gripping object between reserve the return space, take off repeatedly when having solved existing spanner the turn of the screw and the trouble of clamping again.When in lock hole, inserting securing rod, voussoir B and movable jaw locking, at this moment, spanner just can be made anchor clamps and use, and its folder power surpasses existing locking pliers, and can not damage clipped object spare.In sum, the utlity model has and twist not chamfering of hex nut, not slippage does not need to take out repeatedly, can replace pipe wrench to twist tubular articles and also can turn on any nut of twisting not open, and can also serve as locking pliers and use, and scope is widely used.

Description of drawings

Fig. 1 is the perspective view of the utility model embodiment 1;

Fig. 2 is the structural representation after the utility model embodiment 1 voussoir disassembles;

Fig. 3 is the structural representation after the clamping plate on 1 liang of jaw of the utility model embodiment disassemble;

Fig. 4 is the structural representation of voussoir A among the utility model embodiment 1;

Fig. 5 is the structural representation of voussoir B among the utility model embodiment 1;

Fig. 6 is the decomposition texture schematic diagram of the utility model fixed jaw;

Fig. 7 is the perspective view of embodiment 2 of the present utility model;

Fig. 8 is the perspective view of the movable jaw of the utility model embodiment 2;

Fig. 9 is the decomposition texture schematic diagram of the movable jaw of the utility model embodiment 2;

The sectional structure schematic diagram of the movable jaw of Figure 10 the utility model embodiment 2;

Figure 11 is the perspective view when being applied on another F pincers with the utility model structural principle;

Figure 12 is for being applied to the part decomposition texture schematic diagram of another F pincers with the utility model structural principle.

The specific embodiment

The utility model will be further described below in conjunction with the drawings and specific embodiments:

Specific embodiment 1

Shown in Fig. 1, the utility model comprises handle 1, worm screw 2 and fixed jaw 3, movable jaw 4, movable jaw 4 slides along the two jaw arms of angle 6 under the adjusting of worm screw 2, pull a mouthful size thereby adjust, be provided with a voussoir A31 on fixed jaw 3, voussoir A31 major part is towards the two jaw arms of angle, 6 directions, the microcephaly is towards pulling a mouthful direction, voussoir A31 can slide to pulling mouthful direction,, pulls and mouthful reduces to pulling mouthful direction when sliding at voussoir A31; Be provided with a voussoir B41 on movable jaw 4, voussoir B41 microcephaly is towards the two jaw arms of angle, 6 directions, and major part is towards pulling a mouthful direction, and voussoir B41 can slide to the angle limit of two jaws 6 directions, in the two jaw arms of angle, 6 direction sliding processes, pulls mouth by ashamed reducing.The utility model and existing monkey wrench profile basically identical under normal conditions, the structure annexation of two voussoirs and two jaws and operation principle are with reference to shown in Fig. 2～5.

With reference to Fig. 2,3,4,5, shown in 6, on existing fixed jaw 3 clamping faces, establish a fixed jaw chute 33 for voussoir A31 placement, voussoir A31 places in the fixed jaw chute 33, in order to make 3 of voussoir A31 and fixed jaws be more prone to slide, between voussoir A31 and fixed jaw 3 contact-making surfaces, establish the little smooth material layer 32 of one deck coefficient of friction or voussoir A31 and fixed jaw 3 contact-making surfaces are formed the little smooth layer of coefficient of friction by sanding and polishing, in fixed jaw chute 33, also be provided with one and stop groove 36, stop groove 36 to be located at fixed jaw chute 33 roots, be provided with a protruding block 312 that matches with prevention groove 36 with even surface A314 on the fixed jaw chute 33 contact voussoir A31 (also being the another side relative) with voussoir A clamping face 311, protruding block 312 places and stops in the groove 36, protruding block 312 has limited voussoir A31 and has skidded off to pulling a mouthful direction too much, thereby make unlimited increase of the suffered normal pressure of two jaws when using and produce excessive modification, in fixed jaw 3, be provided with an extension spring cavity, be provided with an extension spring 34 in the extension spring cavity, extension spring 34 1 ends are fixed on the fixed jaw 3, the other end is connected on the tail end of protruding block 312, at voussoir A31 to pulling after a mouthful direction skids off, extension spring 34 can be drawn it and be resetted, on the side of voussoir A31, be provided with a parallel qualification chute A313 of even surface A314 that contacts with fixed jaw chute 33, be provided with one near an end of pulling mouthful and limit bar A3131 limiting chute A313, limiting bar A3131 is fixed on the fixed jaw runner wall, the fixed jaw runner wall also is the clamping plate 35 that are fixed on fixed jaw 3 two sides by rivet, limit the cooperation of chute A313 and qualification bar A3131, can limit voussoir A31 to pulling mouthful middle not coming off.

On existing movable jaw 4 clamping faces, establish a movable jaw chute 43 for voussoir B41 placement, voussoir B41 places in the movable jaw chute 43, in order to make 4 of voussoir B and movable jaws be more prone to slide, between voussoir B41 and movable jaw 4 contact-making surfaces, also be provided with the little smooth material layer 42 of one deck coefficient of friction or voussoir B41 and movable jaw 4 contact-making surfaces are formed the little smooth layer of coefficient of friction by sanding and polishing, on the side of voussoir B41, be provided with a qualification chute B413 parallel with the contacted even surface of movable jaw 4 414, in limiting chute B413, be provided with one and limit bar B4131, qualification bar B4131 limits and decides the end of chute B413 near the two jaw arms of angle 6, between the other end that limits chute B413 and qualification bar B4131, be provided with compression spring 4132, limiting bar B4131 two is fixed on the movable jaw runner wall, the movable jaw runner wall also is the movable jaw clamping plate 45 that are fixed on movable jaw 4 two sides by rivet, limit bar B4131 and limit cooperating of chute B413, not only play and prevent that voussoir B41 is to pulling mouthful middle coming off, and, can also prevent that voussoir B41 from coming off to pulling a mouthful direction.Before the use, under the location of spring 4132 and qualification bar B4131, remain with a behaviour area 5 between the voussoir B41 and the two jaw arms of angle 6, in use, voussoir B41 can slide in the behaviour area.

Because of the voussoir A clamping face 311 on the voussoir A31 is vertical with the two jaw arms of angle 6, voussoir A clamping face 311 replaces the clamping face on the existing spanner fixed jaw 3; Voussoir B clamping face 411 on the voussoir B41 is vertical with the two jaw arms of angle 6, and voussoir B clamping face 411 replaces the clamping face on the existing spanner movable jaw 3, so, the utility model and existing monkey wrench profile basically identical under the normality.

On voussoir A clamping face 311, be provided with crown and be partial to the latch of the two jaw arms of angle, 6 directions, on voussoir B clamping face 411, be provided with the latch that crown is partial to two jaw opening directions, also be provided with latch 61 on the two jaw arms of angle 6.

Shown in Fig. 3, operation principle of the present utility model: when pulling a mouthful clamping nut and clockwise rotate, nut produces a reaction force left to voussoir A31, voussoir B41 is produced a reaction force to the right, because of voussoir A31 and voussoir B41 are provided with latch, be equipped with the smooth material layer between voussoir A31 and the fixed jaw A3 and between voussoir B41 and the movable jaw B4 or shiny surface contacts, and be provided with latch between voussoir clamping face and nut, frictional force between two voussoirs and two jaws is just less than the frictional force between two voussoirs and nut, voussoir A31 will slide left, simultaneously, voussoir B41 will slide to the right, closely clamp until two voussoirs and nut, active force is big more, hold tight more, skidding when excessive can not occur exerting oneself, when the utility model during at tube, can reach same technique effect, on the two jaw arms of angle 6, also be provided with latch 61, can also increase impetus, increase frictional force, share a part of power, reduce the damage of external force to movable jaw 4 and fixed jaw 3, the utility model just can replace existing pipe wrench.When pulling mouthful clamping hex nut or tube and rotate counterclockwise, nut or tube produce a reaction force to the right to voussoir A31, in addition under the effect of extension spring 34, voussoir A31 just slides into reset mode to the right, in the voussoir A31 reseting procedure, pull mouth and will pursue ashamed increase, and voussoir B41 is subjected to nut or tube reaction force left, voussoir B41 will slide left, also can make and pull mouth by ashamed increase, nut or water pipe and two voussoirs produce and slide, and reserve and take off repeatedly when the return space has solved existing spanner the turn of the screw and the trouble of clamping again, thereby make the utility model spanner increase a kind of function of ratchet.

Specific embodiment 2

With reference to Fig. 7,8,9, shown in 10, specific embodiment 2 is basic identical with specific embodiment 1 structural principle, annexation is identical between fixed jaw 3 and the voussoir A31, different is: movable jaw 4,4 ' with voussoir B41, different on the syndeton between 41 ', specific embodiment 2 effect aspect ratcher function is more obvious, when twisting big nut, the inscribed circle of big nut and circumscribed diameter differ bigger, pulling mouthful reverse not the stressing of size and clamping nut when the forward stressed rotation of clamping nut pulls a mouthful size when rotating and differs bigger, under the preceding topic that movable jaw 4 is not transferred, voussoir B41 ' skids off to pulling a mouthful direction as much as possible, voussoir B41 ' skids off apart from far away more, it is big more to pull mouth, in order to realize above purpose, embodiment is: be provided with a movable jaw chute 43 ' on the jaw head of movable jaw 41 ', the even surface 414 ' that voussoir B41 ' contacts with movable jaw 4 is provided with the protruding draw runner 412 ' that matches with movable jaw chute 43 ', projection draw runner 412 ' is located in the movable jaw chute 43 ', bottom in movable jaw chute 43 ' is provided with a shell fragment 4132 ', shell fragment 4132 ' one end is hook-shaped, hook is on movable jaw 4 ', shell fragment 4132 ' the other end is located at the root of voussoir B41 ', and voussoir B41 ' upspring to pulling a mouthful direction, in movable jaw chute 43 ', also be provided with an extension spring B44 ', an extension spring B44 ' end is fixed on the root of movable jaw chute 43 ', the other end is connected the middle part of protruding draw runner 412 ', establish one in the side of protruding draw runner 412 ' and limit chute B413 ', establish one at the middle part that limits chute B413 ' and limit bar B4131 ', the two ends that limit bar B4131 ' are located on the movable jaw runner wall, under voussoir B41 ' active force, can slide to the two jaw arms of angle, 6 directions, until stopped by the two jaw arms of angle 6, also can slide to pulling mouthful direction, until limiting the qualification that chute B413 ' is limited bar B4131 ', after the two jaw arms of angle, 6 directions are slided, voussoir B41 ' resets by shell fragment 4132 ', after pulling mouthful direction slip, voussoir B41 ' resets by extension spring B44 '.

On the side of movable jaw 4 ', be provided with a lock hole 45 ', lock hole 45 ' is corresponding near the two jaw arms of angle, 6 one ends with qualification chute B413 ', when in lock hole, a securing rod being inserted into the qualification chute B413 ', voussoir B41 ' will be locked, can't slide to pulling mouthful direction, at this moment, spanner just can be made anchor clamps and use, its folder power surpasses existing locking pliers, and can not damage clipped object spare.

Shown in Figure 11,12, the structural principle new according to this practicality can also be used for the F pincers and make the F pincers have the pipe wrench effect simultaneously.

Claims

1, multi-functional self-tightening monkey wrench, comprise handle (1), worm screw (2) and pull mouth by what fixed jaw (3) and movable jaw (4) were formed, movable jaw (4) slides along the two jaw arms of angle (6), it is characterized in that: on fixed jaw (3), be provided with voussoir A (31), voussoir A (31) is provided with a voussoir A clamping face (311), between voussoir A (31) and fixed jaw (3) by chute and cooperate the draw runner structure to be connected; On movable jaw (4), be provided with voussoir B (41), voussoir B (41) is provided with a voussoir B clamping face (411), between voussoir B (41) and movable jaw (4) also the draw runner structure by chute and cooperation be connected, and the concentric reducer of voussoir A (31) and voussoir B (41) towards on the contrary.

2, multi-functional self-tightening monkey wrench according to claim 1 is characterized in that: voussoir A (31) major part on the described fixed jaw (3) is towards the two jaw arm of angle (6) directions, and the microcephaly is towards pulling a mouthful direction; Voussoir B (41) microcephaly on the described movable jaw (4) is towards the two jaw arm of angle (6) directions, major part is towards pulling a mouthful direction, be provided with the behaviour area (5) of voussoir B between the voussoir B (41) and the two jaw arms of angle (6), and the voussoir A clamping face (311) and all vertical two jaw arms of angle (6) of voussoir B clamping face (411).

3, multi-functional self-tightening monkey wrench according to claim 1 and 2, it is characterized in that: also be provided with an extension spring A (34) between described fixed jaw (3) and voussoir A (31), be provided with between described movable jaw (4) and voussoir B (41) one to voussoir B (41) to pulling mouthful spring of direction applied thrust or shell fragment (4132).

4, multi-functional self-tightening monkey wrench according to claim 3 is characterized in that: also be provided with an extension spring B (44 ') between described movable jaw (4) and voussoir B (41).

5, multi-functional self-tightening monkey wrench according to claim 1 is characterized in that: described voussoir A clamping face (311) is equipped with latch on the voussoir B clamping face (411).

6, according to claim 1 or 2 or 5 described multi-functional self-tightening monkey wrenches, it is characterized in that: described voussoir A clamping face (311) is provided with the latch that crown is partial to the two jaw arm of angle (6) directions, and described voussoir B clamping face (411) is provided with the crown deflection and pulls the latch of mouthful direction.

7, multi-functional self-tightening monkey wrench according to claim 1 is characterized in that: the surface of the draw runner structure of described chute and cooperation is provided with the little smooth material layer of one deck coefficient of friction (32,42).

8, multi-functional self-tightening monkey wrench according to claim 1 and 2, it is characterized in that: described fixed jaw (3) is provided with fixed jaw chute (33), be provided with prevention groove (36) at fixed jaw chute (33) root, voussoir A (31) is located in the fixed jaw chute (33), the protruding block (312) that on voussoir A (31) and the contacted even surface A of fixed jaw chute (33) (314), is provided with and stops groove (36) to match and slide, be provided with a qualification chute A (313) parallel with the even surface A (314) of voussoir A (31) in voussoir A (31) side, in limiting chute A (313), limit bar A (3131) near being provided with one on the end of pulling mouth, limiting bar A (3131) is fixed on the fixed jaw runner wall, fixedly also be provided with the extension spring cavity on the volume (3), be provided with an extension spring (34) in the extension spring cavity and connect voussoir A (31) and fixed jaw (3); Described movable jaw (4) is provided with movable jaw chute (43), voussoir B (41) is located in the movable jaw chute (43), the side of voussoir B (41) is provided with a parallel plane qualification chute B (413) relative with voussoir B clamping face (411), an end that limits the close two jaw arms of angle (6) in the chute B (413) is provided with one and limits bar B (4131), between the other end that limits chute (413) and qualification bar B (4131), be provided with a compression spring (4132), limit bar B (4131) and be fixed on the movable jaw runner wall.

9, multi-functional self-tightening monkey wrench according to claim 1 and 2, it is characterized in that: described fixed jaw (3) is provided with fixed jaw chute (33), be provided with prevention groove (36) at fixed jaw chute (33) root, voussoir A (31) is located in the fixed jaw chute (33), the protruding block (312) that on voussoir A (31) and the contacted even surface A of fixed jaw chute (33) (314), is provided with and stops groove (36) to match and slide, be provided with a qualification chute A (313) parallel with the even surface A (314) of voussoir A (31) in voussoir A (31) side, in limiting chute A (313), limit bar A (3131) near being provided with one on the end of pulling mouth, limiting bar A (3131) is fixed on the fixed jaw runner wall, fixedly also be provided with the extension spring cavity on the volume (3), be provided with an extension spring (34) in the extension spring cavity and connect voussoir A (31) and fixed jaw (3); Described movable jaw (4 ') is provided with a movable jaw chute (43 '), the face that voussoir B (41 ') contacts with movable jaw is provided with the protruding draw runner (412 ') that matches with movable jaw chute (43 '), projection draw runner (412 ') is located in the movable jaw chute (43 '), in movable jaw chute (43 '), be provided with an energy to voussoir B (41 ') to pulling the shell fragment (4132 ') that mouthful direction applies elastic force, in movable jaw chute (43 '), establish an extension spring B (44 ') in addition, extension spring B (44 ') end is fixed on the movable jaw (4 '), on the other end connection bump draw runner (412 '), establish one in the side of protruding draw runner (412 ') and limit chute B (413 '), establish a qualification bar B (4131 ') at the middle part that limits chute B (413 ') near pulling a mouthful direction, the two ends that limit bar B (4131 ') are located on the movable jaw runner wall.

10, multi-functional self-tightening monkey wrench according to claim 9 is characterized in that: described movable jaw (4 ') be provided with one with limit an end corresponding lock hole (45 ') of chute B (413 ') near the two jaw arms of angle (6 ').

11, multi-functional self-tightening monkey wrench according to claim 1 is characterized in that: describedly be provided with latch (61) on the angle limit (6) of fixed jaw and movable jaw.