CN103302606B - Water pump pliers - Google Patents

Abstract

The invention relates to pliers, especially water pump pliers which comprise a first pliers'arm (2) and a second pliers' arm (3), wherein the first pliers' arm (2) and a second pliers' arm (3) are mutually connected and are rotatable about the a rotary axis (4), one of the pliers' arms is provided with a long hole (15) forming a sawtooth profile (16), and the other is rotatably about a locking member (19) arranged in the sawtooth profile. The locking member (19) is translatory moved in a release position in the hole and lockably arranged in a locking position by shape joint in the profile. The locking member is held in the locking position by a spring force and moved from the lock position into the release position against the spring force by an actuating lever (18).

Description

Water pump pliers

Technical field

The present invention relates to a kind of pincers, particularly water pump pliers.

Background technology

By prior art known water pump pliers, it is particularly used by installer when water pipe is laid when heater unit is installed and when hygienic device is installed or also.The feature of water pump pliers is, it has two long tong arms, and these tong arms can realize high chucking power when only one-handed performance due to lever law between chela.In order to many-sidedly water pump pliers can be used and be suitable for the nut for clamping different size, the diameter needles of such as each nut to 10 kinds of A/Fs until 28 kinds or even 32 kinds of A/Fs, and the pipe of different-diameter can be clamped in addition by water pump pliers, water pump pliers has the governor motion allowing to make two such relative translation movements of tong arm, and the distance to each other of described chela can be regulated changeably.If reach desired basic adjustment, then described two tong arms moved relative to each other are fixed position rotationally via governor motion, make by performing pincers motion, chela open and close.After usage, water pump pliers moves in initial position mostly again, make each chela substantially shape in locking manner against each other, thus avoid cause due to working motion unintentionally injured, such as crush.

Water pump pliers general on market is opened by two tong arms are wide to each other and unlock, and makes the motion can implementing translation.Substantially need two hands for this reason, so described hand realizes correspondingly broadly pushing two tong arms open, and then realize the move toward one another of translational motion and two tong arms, thus two tong arms again rotationally each other position fix.

In order to improve manipulation, manipulation particularly in little working region, DE3303369A1 discloses a kind of water pump pliers, and wherein, two tong arm grafting each other, are configured with elongated hole in an inner tong arm and this elongated hole has the flank profil forming edge.Second tong arm is around lock piece rotatably support, and this lock piece can translational motion and by can be transferred to perpendicular to the axially-movable in elongated hole direction in two different positions in elongated hole.Like this, be occupied via lock piece primary importance, in this primary importance, two tong arm translation positions are fixed but rotatably support each other.

When lock piece moves in the second place vertically, the translation of lock piece in elongated hole is allowed to move.In order to this lock piece is maintained in latched position substantially, via sheet spring, pressure is applied on lock piece.Hence improve adjustment possibility, particularly when operational working space is limited, such as, when installing in the space of the pipeline of multiple laying.But only have and could be realized for the manipulation of adjusted water pump pliers, particularly one-hand control by the height dexterity of carrying out the assembler handled limitedly.

In addition be configured to very solid in the transitional region that these pincers extend between chela and tong arm, therefore these pincers due to the material of tong arm in transitional region and lock piece material and head has large deadweight weightily.Because clamp head part is heavy, (head load is arranged on the opposite end of of pincers, pincers are grasped by the assembler carrying out handling on this end), these pincers have Great inertia here, and sometimes in a few hours long use, needing high steering force, with make pincers one working day hundreds of time or even move to for several thousand times in different instrumental purpose positions.

Summary of the invention

Task of the present invention is, improves a kind of pincers, particularly water pump pliers like this from prior art, makes described pincers can be easier to handle at favourable manufacture possibility further aspect and provide the intensity of raising in addition.In addition, task of the present invention is also the dirigibility improving pincers.

Above-mentioned task is solved by pincers of the present invention according to the present invention, described pincers particularly water pump pliers.

Have the first tong arm and the second tong arm by pincers of the present invention, particularly water pump pliers, these two tong arms are interconnected rotationally about clinoid.A tong arm has elongated hole, sawtooth profile is configured with in elongated hole, and another tong arm is centered around the lock piece arranged in this elongated hole forms rotationally, this lock piece is removable in elongated hole in off-position, particularly can translation move, and join in locking manner in sawtooth profile can lock by shape in lock position, and described lock piece is remained in lock position by spring force.Simplify the task that pincers handle to solve like this, namely described lock piece can overcome spring force and transfers to off-position from lock position via operating lever.By the adjustment via lock piece, the quick adjustment clamped can be realized, and without the need to retracting two tong arms at this with first expending, performing adjustment and then again make two tong arms move in opposite directions.In addition, always ensure reliably to join in teeth portion by the self-closing of lock piece.

Within the scope of the invention, lock piece translationally can move in elongated hole, and this is suitable as preferred form of implementation.Such as, but elongated hole itself also can be configured to bend in addition, and elongated hole has the trend of arc.So this lock piece can be followed described arc and be moved towards mobile in the inside of elongated hole.Therefore elongated hole can follow the trend of this tong arm in a tong arm, and this tong arm can be formed equally deviously.As advantage, so the edge of elongated hole may be configured with the thickness substantially remained unchanged, because elongated hole and tong arm have same trend in this case.

Within the scope of the invention, the sawtooth profile arranged in elongated hole can be the profile of any type, and described profile shape can be placed in joint in locking manner in the position of limited quantity.Like this, the sawtooth that sawtooth profile can be such as triangle pyramidal structure in other words by cross section is formed, but also can construct waveform profiles or also can there is the profile of other forms of geometry, this geometry can shape in locking manner in the diverse location of limited quantity position be placed in regularly in the joint with lock piece.

Within the scope of the invention, the recess of each tooth or profile can directly arrange adjacent to each other or also can have spacing each other, thus such as only realizes fixing position, two or three different positions.But also can relate to the tooth of direct neighbor within the scope of the invention, these teeth such as can realize 10 or even 20 different latched positions by the translational motion each other of two tong arms.

Operating lever is such lever, and it can be arranged on pincers, particularly be arranged on and to be coupled with lock piece in locking manner on tong arm and with side shape and manually actuated on the opposite side opposed with this side with deflecting.Preferred operations lever can be pressed by the direction of the thumb carrying out the erector handled towards pincers itself, and by lever motion, lock piece is transferred to off-position from lock position.Then it is possible that such as by moving with making two tong arm relative translations by hand inner face and remaining four finger grip and by the relative movement of finger with gesture and facial expression.

Due to the lever law of operating lever, little power is only needed to be used for overcoming spring force and unlocking this lock piece thus.Directly to lock piece pressing, but need not realize operator close friend and labour-saving operation simultaneously via lever.But guarantee simultaneously, guarantee enough pretensions by the spring force put in lock position on lock piece, thus the manipulation of the work safety of pincers is possible.

Preferred operations lever to be bearing in a tong arm around deflection pin and to surround the head side of lock piece.Particularly lock piece has oblate top for this reason, and this oblate top to be particularly preferably formed on lock piece and integratedly by the jaw of operating lever by engage below or shape is engaged in locking manner from behind in the receiving opening of operating lever.When operating, lock piece and operating lever implement relative motion each other, make to allow lock piece to transfer to disengaged position and from disengaged position from lock position simply again to transfer to lock position, and lock piece can not be crooked in tong arm.

Above-mentioned task is in addition by a kind of pincers, particularly water pump pliers solves, this tonger has the first tong arm and the second tong arm, these two tong arms can be interconnected rotationally about clinoid, each tong arm has handle section, head section, the chela that head section is arranged and the transition zone extended between head section and handle section, and described two tong arms can be formed mutually movably in translation, the A/F of chela can be changed thus, and the feature described before described pincers particularly also have, at least one tong arm has truss structure in head section, this truss structure is that power is flow-optimized, and/or each chela has clamping zone and tip, the rotational motion of two tong arms can implemented by two tong arms is limited like this, and namely when clamping completely closed, the spacing at the tip of each chela is less than the spacing of each chela in clamping zone.

Truss structure is interpreted as such structure within the scope of the invention, and its support bar mutually arranged by truss-like ground and the space arranged in support bar are formed.Described support bar is given prominence to relative to space, and the mutual orientation of support bar is selected according to expected power stream.Thus it is possible that pincers are particularly optimized in the region of head side or in the transitional region extended from head section to handle section in its weight, at least keep identical intensity simultaneously.Obtain obvious better simply navigability thus, the limbs of the arm carrying out the erector handled are protected, because he only needs, cost is obviously less will clamp the power deflected in relevant work position.

In addition, save obviously economically can produce pincers by material in this region just.High strength characteristics realizes by manufacturing tong arm with FMT, and now strength characteristics is higher if not the water pump pliers even manufactured than tradition, still at least keeps identical strength characteristics although then save due to material.

Be by another advantage of water pump pliers of the present invention, due to the spacing at the tip of each chela in completely closed pincers, needing to be placed at object in the clamping zone between each chela can always be clamped by the pincers motion realized with hand in the handle section of tong arm well.Due to the less mutual spacing at each chela tip compared with the mutual spacing when clamping completely closed with chela in clamping zone, prevent by the object clamped, this large pipe such as with pipe external diameter that slippage is out from clamping zone.

Within the scope of the invention, operating lever is particularly preferably formed on a tong arm like this, makes this operating lever extend to handle section at least in part from transition zone, described transition zone on a tong arm between head section and handle section.Therefore, this operating lever is configured to microscler component and grasps the lock piece in the head side region being arranged in transition zone with one end thereof, the side opposed with this head side region of transition zone extends in handle section at least in part, thus this side can be operated in handle section by when regulation and the clamping of work safety at water pump pliers.Particularly operated by thumb or forefinger, that finger of namely pointing to towards clamp head part when usually handling water pump pliers.Thus it is possible that make pincers remain in working region by the motion of hand, but simple especially and regulate its size uncomplicatedly.

In order to operating lever can be delivered on lock piece the lever force applied by finger, this operating lever particularly preferably can be bearing on a tong arm via run-on point with deflecting, and this run-on point is particularly configured to lateral pin.Here it is possible that operating lever is installed on described tong arm and then load lateral pin and fixing, be particularly riveted in described tong arm.Even if operating lever frequently uses when water pump pliers in every day and is also arranged on wherein by regulation thus, and the inefficacy of operating mechanism is avoided.Riveted joint is carried out particularly preferably on the lock piece formed integratedly.But within the scope of the invention, also can fix lateral pin by different way.This can the sealed and/or force closure of shape and/or material carry out in locking manner.Particularly importantly, lateral pin can not be fixed in tong arm with losing.

Within the scope of the invention, the spring force acted on lock piece is particularly applied on lock piece via operating lever.For this reason, spring is provided with, particularly helical compression spring or sheet spring particularly preferably between the operation section of operating lever and the tong arm being coupled to operating lever.Realize thus, spring is arranged away from lock piece.The spring arranged in the region of lock piece due to motion in this region and abrasivity wearing and tearing other known with the water pump pliers of locking mechanism in often cause losing efficacy.That a tong arm is riveted and the sheet spring with the pretightning force directly acted on lock piece when this water pump pliers frequently uses for many years in contour area due to loosening of spring force through frayed and suffer the danger of mechanical damage in addition in principle due to the effect of outside.By by spring from regulate and locking mechanism region move in region non-key on tong arm and avoid these problems.Particularly helical compression spring due to its spring performance be here suitable, even if because its spring force is when frequently and when using also can not losing its tensile force throughout the year everyday.

In addition particularly preferably, operating lever is configured with jaw, and this jaw surrounds lock piece with can be movable relatively.In the optional embodiment of one, operating lever is configured with eccentric receiving opening, and this receiving opening can be coupled with lock piece with can be movable relatively.Particularly this receiving opening and lock piece bayonet type ground lock and operating lever is arranged on pincers.

In addition preferred, lock piece is configured with oblate top, and within the scope of the invention, particularly oblate top is formed on lock piece integratedly.Thus it is possible that do not bear the pulling force formed during lock piece operation tightly.Form lock piece relative to rivet, always there is the danger of component failure here during use, this danger is avoided due to the integraty by locking head of the present invention.Therefore particularly coordinate with jaw or coordinate it is possible that can be movable relatively landform be mutually coupled lock piece and operating lever in locking manner with receiving opening.

In addition particularly preferably, operating lever is coupled in region what be coupled with lock piece the bending receiving face had for engaging oblate top from behind, and this bending each tong arm ground is dorsad directed.By described bending it is possible that set up during the whole yaw motion of operating lever described operating lever to be engaged from behind by oblate top or under joint, make lock piece can not be crooked.Preferably this bends and is formed in like this on oblate top, makes the corresponding normal on bend vertically engage oblate top from below in corresponding position.The axially-movable of the no problem of oblate top is possible thus.

In addition preferred, first tong arm is provided with longitudinal seam in its transition zone, second tong arm has elongated hole with sawtooth profile with its transition zone through longitudinal seam and the second tong arm, and lock piece can translational motion and being fixed by position in lock position in the second tong arm in disengaged position, lock piece also can axially movably support in the first tong arm, make by moving axially lock position or disengaged position can be occupied, and the first tong arm is around lock piece rotatably support.Can realize thus, pincers motion or clamping movement can be implemented when sawtooth profile interior location is fixed by the rotating supporting of the first tong arm at lock piece.

Can be realized by the disengaged position occupying lock piece, at the inner mobile lock piece of the elongated hole of the second tong arm, these two tong arms are kept position by longitudinal seam with through the second tong arm of longitudinal seam each other regularly along the axially-movable direction of lock piece.Can also realize according to the present invention thus, water pump pliers is limited to the component of the needs application of minimum number, because do not adopt any additional supporting member, spring element or other rivet, clamp ring or analog being coupled in region.Particularly be coupled region to form only by the first and second tong arms and by the lock piece making two tong arms be coupled rotationally.In order to operable lock stop member, be provided with in addition by operating lever of the present invention.Be coupled in region avoid other component, such as clamp ring, spring or analog.

In addition particularly preferably, the first tong arm is formed like this, on upside, to be namely provided with at least one for the receptacle of operating lever and to be provided with pilot hole on upside and on downside, and lock piece axially movably and can penetrate rotatably the first tong arm in pilot hole.Lock piece is therefore removable in each pilot hole along its axial direction, to occupy lock position or off-position, and also can be installed in pincers when assembling first.So the first tong arm is arranged rotationally around lock piece in addition, make can implement pincers motion by rotational motion.Be preferable over is that operating lever is equally along with the companion rotation around the rotational motion of lock piece of the first tong arm.Thus, operating lever is also arranged rotationally around lock piece in the region of jaw or in the region of receiving opening.

In addition, operating lever has protuberance on fore side, and this protuberance to stretch in the receptacle of the upside of the first tong arm and abuts in limiting on the downside of the first tong arm when operating this operating lever in off-position, namely.Obtain such possibility thus, namely at the yaw motion handling this this operating lever of operating lever limit.In addition be coupled because the shape of operating lever and lock piece is sealed, do not need lock piece from any other locking with it or device for limiting thus.Therefore lock piece limits the axial displaceability of this lock piece in lock position and in off-position in locking manner by operating lever shape.Fully eliminate clamp ring structure or other the position fixture of lock piece thus.

In addition preferably helical compression spring is set over the projections, thus adjusted mechanism and for the simple of the rotational motion implementing to clamp motion and simultaneously effective and lasting kinematics be coupled.

In addition particularly preferably, pilot hole is formed circularly on downside.Particularly, lock piece is formed on its underside too circularly, and lock piece particularly preferably has circular section here.The shape that at least may realize between the pilot hole and the section of circle of circle on the side of pincers is thus sealed, and this guarantees the load high as far as possible when implementing pincers motion.In addition preferred, in the zone line of lock piece, be provided with multiple tooth, these teeth and sawtooth profile are formed accordingly.When sawtooth profile mutual arrangement, direct neighbor, leg-of-mutton profile, the described tooth on lock piece correspondingly also triangular ground, direct neighbor ground form.

In addition particularly preferably, such formation lock piece, namely lock piece has middle region, two parallel walls are provided with in the region of this centre, and described tooth stretches out relative to these walls, described each wall spacing each other equals the spacing at each tip of the sawtooth profile of elongated hole, make to realize in off-position the slip that shape in elongated hole is sealed, and tooth energy shape is placed in the joint with sawtooth profile in position in locking manner regularly described in lock position.The wall implemented abreast by two it is possible that described wall be arranged on the sawtooth profile of elongated hole each tip between and in lock position, realize position thus on the one hand due to the tooth stretched out relative to wall fix and the slip realizing crossing the tip of sawtooth profile on the other hand in off-position.

In addition preferred, the length of described wall is formed with at least equaling the most advanced and sophisticated spacing of two of sawtooth profile.Guarantee thus, when occupying off-position and translational motion, this lock piece can not be crooked at two of elongated hole opposite sawtooth contoured interior, but directed like this on the direction of translation freedoms, and this lock piece is always moved abreast in the inside of elongated hole.

Particularly described tong arm is made by FMT, obtains the highest strength characteristics thus while weight saves possibility.Therefore by minimizing according to the structure of required component of the present invention, tong arm directly can form and be placed in rotationally via lock piece and is bonded with each other, and without the need to additional supporting member or analog.Within the scope of the invention, tong arm is particularly made up of Steel material, and lock piece is also very particularly preferably made up of Steel material.Operating lever equally also can be made up of Steel material within the scope of the invention, but also can be made up of by light metal or also plastic material.

In addition particularly preferably, described each tong arm there is truss in handle section and/or be configured with in handle section at least partly around support bar.By the truss that forms in handle section it is possible that reduce in addition while strength characteristics remains unchanged and conduct oneself with dignity, particularly in the handle section affected by chucking power consumingly by the ratio of water pump pliers of the present invention.In addition by described at least partly around support bar obtain such possibility, namely rigidity in handle section is improved and simultaneously for applying hand-power to the operational area design on water pump pliers for large like this, grasp face described in making can not cut in the hand carrying out the erector handled, but have and grasp face for applying the enough of hand-power.

Within the scope of the invention, above-mentioned feature can at random combination with one another have advantage related to this, and does not leave scope of the present invention at this.

Accompanying drawing explanation

Other advantages of the present invention, feature, characteristic and aspect are the parts of follow-up explanation.Preferred embodiment is shown in the diagram.

Fig. 1 illustrates by the water pump pliers be in the position of opening of the present invention;

Fig. 2 illustrates by the water pump pliers be in closed position of the present invention;

Fig. 3 and 4 illustrates the cross-sectional view of water pump pliers along hatching A-A;

Fig. 5 and 6 illustrates the cross-sectional view of water pump pliers according to hatching B-B;

Fig. 7 and 8 illustrates side view by operating lever of the present invention and top view;

Fig. 9 illustrates the perspective view comprising lock piece by operating lever of the present invention;

Figure 10 and 11 illustrates the second embodiment by water pump pliers of the present invention, and this water pump pliers has the operating lever with jaw;

Figure 12 illustrates the operating lever of the embodiment by Figure 10 and Figure 11;

Figure 13 illustrates the water pump pliers by being in closure state after axially expansion of the present invention.

Detailed description of the invention

In the accompanying drawings identical Reference numeral is adopted for same or similar component, even if be also like this when eliminating repeated description for simplification reason.

Fig. 1 illustrates by water pump pliers 1 of the present invention, and it has the first tong arm 2 and the second tong arm 3, and these two tong arms are coupled rotationally mutually around rotation 4.In addition, have blocking mechanism by water pump pliers 1 of the present invention, this blocking mechanism allows the adjustment campaign 5 implementing translation between the first tong arm 2 and the second tong arm 3, the A/F 6 of adjustable water pump pliers thus.In addition, each tong arm 2,3 have handle section 7,8, head section 9,10 and the chela 11,12 arranged in head section 9,10 and the transition zone 13,14 extended between head section 9,10 and handle section 7,8.

In order to implement the adjustment campaign 5 of translation, in the transition zone 13,14 of the second tong arm 3, be provided with elongated hole 15, this elongated hole 15 has sawtooth profile 16 respectively on its each outward flange.In addition, two tong arms 2,3 have respectively in handle section 7,8 outside at least part of around support bar 17, this support bar increases the bearing-surface of the hand for the assembler operated in handle section 7,8.

By the present invention, water pump pliers 1 is provided with operating lever 18, this operating lever makes lock piece 19 in axial direction move (not being shown specifically at this) when operating, thus this lock piece to be brought into from lock position off-position and to implement the adjustment campaign 5 of translation.When lock piece 19 is arranged in lock position, then two tong arms 2,3 are around rotation 4 rotatably support.

In addition, have truss 20 by water pump pliers 1 of the present invention in head section 9,10, this truss 20 is made up of the support bar 22 of recess 21 and supporting between each recess 21.Just in time in the head zone of tong arm 2,3, save material and saving in weight thus, therefore water pump pliers 1 is at least keeping can more advantageously manufacturing significantly and having less deadweight under identical intensity.

Fig. 2 illustrates the water pump pliers 1 be in initial position, wherein, implements the motion 5 of translation like this, makes water pump pliers 1 have minimum possible A/F.The hatching A-A elaborated in figs. 3 and 4 is shown.

Fig. 3 illustrates the water pump pliers 1 be in initial position of Fig. 2.Be arranged in lock position at this lock piece 19.By realizing in axial direction 23 moving lock piece 19 to operating lever 18 operation, lock piece 19 is made to occupy off-position as shown in Figure 4.In this off-position, the tooth be not here shown specifically departs from from the sealed joint of the shape of sawtooth profile, thus allows the moving movement 5 of translation in elongated hole 15 between the first tong arm 2 and the second tong arm 3.

In order to mutual in axial direction 23 shapes of tong arm 2,3 keep location in locking manner, the first tong arm 2 has longitudinal seam 24 in its transition zone 13, and the second tong arm 3 shape is in locking manner through this longitudinal seam 24 of the first tong arm 2.Operating lever 18 is placed in off-position by operating.For this reason, operating lever 18 is deflected around run-on point 25.In order to lock piece 19 can not drop out from the first tong arm 2 and the second tong arm 3, can arrange with deflecting in the receptacle 26 of operating lever 18 in the first tong arm 2, lock piece 19 can axially-movable landform be fixed position in locking manner by pilot hole 27.

Shown here of pilot hole 27 is formed on the downside 28 of tong arm 2, but forms in the upside 29 of the first tong arm 2 in the second tong arm 3 and also equally.

Operating lever 18 has protuberance 30, on the sealed downside 28 abutting in the first tong arm 2 of this protuberance 30 shape in off-position, and limits the yaw motion of operating lever 18 around run-on point 25 thus.This external oblate top 31 engages lock piece 19 from below to operating lever 18, and make by operating this operating lever 18, lock piece 19 implements axially-movable.In addition illustrate in figs. 3 and 4 respective rings in the handle section 7 of the first tong arm 2 around support bar 17.

In addition Fig. 5 and Fig. 6 illustrates the cross-sectional view by the hatching B-B in Fig. 2.Lock piece 19 is in lock position in Figure 5, and on the contrary, lock piece 19 is by being placed in off-position the operation of operating lever 18 in figure 6.The sawtooth profile 16 of elongated hole 15 shown in Figure 6, lock piece 19 has multiple tooth 32, and these teeth in Figure 5 shape engage with sawtooth profile 16 in locking manner.

Also can see in figs. 3 and 4, operating lever 18 is close to be sunk to the inside of the upside 29 of the first tong arm 2 or arranges with flushing with on the upside of this, makes to produce any danger owing to unnecessarily hanging on operating lever 18.In addition, such operating lever 18 is protected prevents the damage of machinery, and can not provide any corrosion pitting for polluting thus simultaneously, though therefore when frequent use water pump pliers 1 of the present invention also maintain general impression attractive in appearance.

In addition, the side view of operating lever 18 shown in Figure 7.Protuberance 30 and the installing hole 33 for passing the deflection pin be not shown specifically can be found out well, to realize run-on point.In addition, operating lever has fore side 34.On that side opposed with this fore side 34, operating lever 18 also has receives side 35, and in this receiving side 35, as shown in Figure 8, be provided with and receive opening 36, this receiving opening is used for being coupled in locking manner with the lock piece shape be not here shown specifically.In addition can finding out, receiving side 35 is provided with bending receiving face 37, making the oblate top of the lock piece that the corresponding face normal N illustrated substantially perpendicularly here is not shown specifically when operating engages this lock piece from below.

In addition shown in Figure 9, the fore side 34 of operating lever 18 arranges helical compression spring 38.So this helical compression spring 38 to abut in locking manner between the protuberance 30 of operating lever 18 and the downside 28 of the first tong arm 2 by Fig. 3 and 4 shapes and applies spring force on lock piece 19 via operating lever 18.In addition illustrate, lock piece 19 engages with receiving opening 36 shape of operating lever 18 in locking manner with oblate top 31.Here such as can imagine, lock piece 19 bayonet type is locked in be received in opening 36.Lock piece 19 has multiple tooth 32 in addition, so these teeth can shape engage with the sawtooth profile be not shown specifically of the elongated hole of the second tong arm in locking manner.

Figure 10,11 and 12 illustrates another embodiment by water pump pliers 1 of the present invention, in head section 9,10, again form the truss 20 comprising recess 21 and support bar 22.Operating lever 18 self has jaw 39, and this jaw shape engages the oblate top 31 of lock piece 19 in locking manner from behind.Realize thus forming lock piece 19 like this, make it on downside 28, have circular section 40 according to Figure 11.The sealed joint of shape formed between operating lever 18 and lock piece 19 based on jaw 39 is shown specifically by Figure 12.Jaw 39 shape engages the oblate top 31 be formed in integratedly on lock piece 19 in locking manner from behind.Jaw 39 has gathering sill 41 in addition, and these guiding flute profiles engage from behind in locking manner and position guides oblate top 31 regularly.This external downside 42 is configured with circular section 40, is used for implementing pincers motion so this section shape to be bonded in locking manner in the pilot hole of the first tong arm and therefore can to transmit large power here.

Lock piece 19 has outer peripheral face 43 in addition, so inside transmitting force in lock position of the pilot hole of this outer peripheral face particularly on the upside of the first tong arm.In addition, lock piece 19 is provided with multiple tooth 32, these teeth shape can be placed in the joint with sawtooth profile in locking manner in lock position.In addition, lock piece 19 has two parallel walls 44, and each tooth 32 is arranged on wall 44, and described wall 44 shape guides lock piece 19 by elongated hole in locking manner between each tip of sawtooth profile on disengaged position and on lock position.

Figure 13 illustrates the such view by water pump pliers 1 of the present invention, and in this view, two tong arms 2,3 can move opposite to each other.Between each chela 11,12, produce such angle here, make the spacing a1 between the tip 45 of each chela 11,12 to be always less than in clamping zone 46 the spacing a2 parallel with spacing a1 or a3 between each chela 11,12.Avoid by the object that clamps that slippage is out from the chela of tong arm 2,3 thus.

Reference numerals list

1 water pump pliers 25 run-on point

2 first tong arm 26 receptacles

3 second tong arm 27 pilot holes

The downside of 4 rotation 28 first tong arms

The upside of 5 translational motion 29 first tong arms

6 A/F 30 protuberances

The oblate top of handle section 31 of 7 first tong arms

The tooth of handle section 32 lock piece of 8 second tong arms

Head section 33 installing hole of 9 first tong arms

Head section 34 fore side of 10 second tong arms

The chela 35 of 11 first tong arms receives side

The chela 36 of 12 second tong arms receives opening

The receiving face that the transition zone 37 of 13 first tong arms is bending

Transition zone 38 helical compression spring of 14 second tong arms

15 elongated hole 39 jaws

16 sawtooth profile 40 circular section

17 support bar 41 gathering sills

The downside of 18 operating lever 42 lock pieces

19 lock piece 43 outer peripheral faces

20 truss 44 walls

21 recesses 45 are most advanced and sophisticated

22 support bar 46 clamping zones

The axial direction N face normal of 23 lock pieces

24 longitudinal seams

Claims (22)

1. clamp, described tonger has the first tong arm (2) and the second tong arm (3), these two tong arms can be interconnected rotationally about rotation (4), a tong arm (2, 3) there is elongated hole (15), sawtooth profile (16) is formed in this elongated hole (15), and another tong arm (2, 3) be centered around the lock piece (19) arranged in this another tong arm can form rotationally, described lock piece (19) can be mobile in elongated hole (15) in off-position, and described lock piece is joined in locking manner in sawtooth profile (16) can be locked by shape in lock position, described lock piece (19) remains in lock position by spring force, it is characterized in that, first tong arm (2) has longitudinal seam (24) between upside (29) and downside (28), second tong arm (3) passes the first tong arm (2) at this longitudinal seam (24) place, first tong arm (2) is on upside (29) and have pilot hole (27) on downside (28), lock piece (19) can axially movably with can be arranged in each pilot hole (27) rotationally, the run-on point (25) that operating lever (18) can be centered around on described upside (29) is deflected, and described lock piece (19) can overcome spring force in axial direction to be transferred to off-position from lock position via operating lever (18).

2. according to pincers according to claim 1, it is characterized in that, each tong arm (2,3) has handle section (7,8), head section (9,10), the chela that head section (9,10) is arranged and the transition zone (13,14) extended between head section (9,10) and handle section (7,8), and these two tong arms (2,3) can be formed mutually movably in translation, the A/F (6) of chela (11,12) can be changed thus

At least one tong arm (2,3) has truss (20) in head section (9,10), and this truss (20) is that power is flow-optimized; And/or each chela has clamping zone and tip, the rotational motion of two tong arms (2,3) can implemented by two tong arms (2,3) is limited like this, and namely when clamping completely closed, the spacing (a1) at the tip (45) of each chela (11,12) is less than the spacing (a2, a3) of each chela (11,12) in clamping zone (46).

3. according to the pincers described in claim 1 or 2, it is characterized in that, operating lever (18) extends to handle section (7,8) from transition zone at least in part, and described transition zone is positioned between head section (9,10) and handle section (7,8) on a tong arm (2,3).

4. according to the pincers described in claim 1 or 2, it is characterized in that, described run-on point (25) is configured to lateral pin.

5. according to the pincers described in claim 1 or 2, it is characterized in that, the spring force of lock piece (19) is applied on lock piece (19) via operating lever (18).

6. according to the pincers described in claim 1 or 2, it is characterized in that, operating lever (18) has jaw (39), and this jaw (39) can surround lock piece (19) in relative motion ground; Or operating lever (18) has eccentric receiving opening (36), this receiving opening (36) can be coupled to relative motion with lock piece (19).

7. according to pincers according to claim 6, it is characterized in that, lock piece (19) has the oblate top (31) formed integratedly, and this oblate top (31) is by jaw (39) or receive opening (36) shape to engage from behind in locking manner.

8. according to pincers according to claim 7, it is characterized in that, operating lever (18) is configured to the bending receiving face (37) engaging oblate top (31) from behind, bending with deviating from two tong arms (2, the 3) orientation in this receiving face.

9. according to the pincers described in claim 1 or 2, it is characterized in that, first tong arm (2) has described longitudinal seam (24) in its transition zone (13), second tong arm (3) with its transition zone (14) through this longitudinal seam (24), second tong arm (3) has the elongated hole (15) of band saw gear tooth profile (16), and lock piece (19) can axially movably be bearing in the first tong arm (2), and the first tong arm (2) can support rotationally around lock piece (19).

10. according to the pincers described in claim 1 or 2, it is characterized in that, the first tong arm (2) has at least one receptacle for operating lever (18) (26) on upside (29).

11. according to pincers according to claim 10, it is characterized in that, operating lever (18) has protuberance (30) on fore side (34), this protuberance (30) stretch into upside (29) receptacle (26) in and abut in limiting in off-position downside (28) on.

12., according to pincers according to claim 11, is characterized in that, protuberance (30) is provided with helical compression spring (38).

13., according to the pincers described in claim 1 or 2, is characterized in that, the pilot hole (27) on downside (28) is formed circularly.

14. according to the pincers described in claim 1 or 2, it is characterized in that, lock piece (19) has circular section (40) on downside (28), and multiple tooth (32) is arranged in the region of centre, these teeth (32) and sawtooth profile (16) are formed accordingly.

15. according to pincers according to claim 14, it is characterized in that, lock piece (19) has middle region, two parallel walls (44) are provided with in the region of this centre, and described tooth (32) stretches out relative to these walls (44), described two walls (44) spacing each other equals the spacing at each tip of the sawtooth profile (16) of elongated hole (15), make can to realize in off-position the slip that shape in elongated hole (15) is sealed, and tooth (32) shape can be placed in the joint with sawtooth profile (16) in position in locking manner regularly described in lock position.

16., according to pincers according to claim 15, is characterized in that, the length of described two walls (44) at least equals the most advanced and sophisticated spacing of two of sawtooth profile (16).

17., according to the pincers described in claim 1 or 2, is characterized in that, described two tong arms (2,3) are made by FMT.

18. according to the pincers described in claim 1 or 2, it is characterized in that, described two tong arms (2,3) have handle section (7,8), in described handle section, be configured with truss (20) and/or be configured with in described handle section (7,8) at least partly around support bar (17).

19., according to the pincers described in claim 1 or 2, is characterized in that, described pincers are water pump pliers (1).

20., according to the pincers described in claim 1 or 2, is characterized in that, described lock piece (19) can move in translation in elongated hole (15) in off-position.

21., according to pincers according to claim 5, is characterized in that, between operation section and the tong arm (2,3) being coupled to operating lever (18), be provided with spring.

22., according to pincers according to claim 21, is characterized in that, described spring is helical compression spring or sheet spring.