EP1941975B1 - Pince de serrage destinée au serrage d'outils - Google Patents

Pince de serrage destinée au serrage d'outils Download PDF

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Publication number
EP1941975B1
EP1941975B1 EP07024617A EP07024617A EP1941975B1 EP 1941975 B1 EP1941975 B1 EP 1941975B1 EP 07024617 A EP07024617 A EP 07024617A EP 07024617 A EP07024617 A EP 07024617A EP 1941975 B1 EP1941975 B1 EP 1941975B1
Authority
EP
European Patent Office
Prior art keywords
crimping
pressing
lever
hand lever
pliers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP07024617A
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German (de)
English (en)
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EP1941975A3 (fr
EP1941975A2 (fr
Inventor
Kurt Battenfeld
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wezag GmbH and Co KG
Original Assignee
Wezag GmbH Werkzeugfabrik
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Publication date
Application filed by Wezag GmbH Werkzeugfabrik filed Critical Wezag GmbH Werkzeugfabrik
Publication of EP1941975A2 publication Critical patent/EP1941975A2/fr
Publication of EP1941975A3 publication Critical patent/EP1941975A3/fr
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Publication of EP1941975B1 publication Critical patent/EP1941975B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/042—Hand tools for crimping

Definitions

  • the present invention relates to a pressing tongs for pressing press dies, sockets, pipes, electrical contacts, cable lugs, fittings and similar workpieces and a use of a pressing tongs.
  • the crimping pliers u. U. have a large opening width to the die halves in the open position, u. U. also for workpieces with relatively large dimensions to be able to pass over the workpiece to be pressed.
  • At the beginning of a closing movement of the pressing tongs are first irrelevant forces applied by the user of the pressing tongs until the die halves contact the workpiece in the closing direction.
  • the pressing forces to be applied reach a considerable magnitude, wherein the pressing forces can increase with increasing closing movement.
  • a crimping pliers of the type described above is made DE 197 09 639 A1 known.
  • the pressing pliers has two in one-hand operation relative to each other movable hand lever and two pivotable about a common pivot press jaws, of which a press jaw is firmly connected to the one hand lever, so that swivel jaw and hand lever form a fixed pressing pliers part, while the other press jaw on solid Pressing tong part is articulated pivotally about the hinge.
  • the pressing tongs are provided with split die halves forming a pressing die on the pressing jaws. When pressing tongs Zwangsgesperre is provided to achieve defined end positions of the die halves. Between the two hand levers, a pressure lever is articulated via further joints pivotally, which forms a toggle lever drive with the movable hand levers.
  • the two die halves are integrally formed with the respective pressing jaws and designed as precision castings.
  • the die jaws can be used interchangeably in the pressing jaws, whereby different die halves can be used for different workpieces with the same pressing tongs.
  • the die halves can be mounted with a clearance against a pressing jaw, whereby a centering adjustment in the direction of a parting plane of the die halves is possible.
  • the document proposes to provide a partial lift for large opening angles of the pressing jaws, for which no pressing forces have to be applied, in that the pressure lever between the two hand levers is displaceably guided by its working position in a slot opposite the fixed hand lever.
  • US 4,170,154 is a pressing tongs with two relatively mutually movable hand levers known -the free ends are hinged to combined around a common pivot press jaws. Between these two joints a forced restraint is realized using separate parts, which on the one hand has a toothed segment and on the other hand a pivotally mounted ratchet tooth.
  • the Zwangsgesperre serves to achieve a defined end position during the closing movement of the pressing jaws.
  • the pressing tongs allow only one-stage closing of the pressing jaws while approaching the hand lever to each other.
  • US 6,116,124 is a pressing tongs with variable adjustable mouth width known.
  • the pressing tongs has two relatively movable hand lever, which are firmly connected to the respective pressing jaw. Between the two hand levers a kind Zwangsgesperre is provided, which is supported a support point against spring force evasive. Also in this pressing tongs each hand lever is formed integrally with the associated pressing jaw.
  • A1 is a pressing tongs known in which the pressing jaws are guided in translational relative movement.
  • a hand lever with a firmly connected pliers head forms a translatory guide for an extension of the movable pressing jaw.
  • a movable hand lever is supported via a joint, which is arranged stationary to the fixed hand lever.
  • a pressure lever is interposed, which is supported in one end portion of a hinge pin of the movable extension and supported in the opposite end portion of a fixedly connected to the pressure lever hinge pin in a slot of the movable hand lever.
  • a toggle mechanism is formed with the movable extension, the pressure lever and the movable lever.
  • An alignment of the long groove to the components of the toggle mechanism is such that a relatively large translation of the toggle mechanism is given for opening and closing of the pressing tongs to allow insertion of a press die, but for which no or only small pressing forces can be achieved.
  • For this opening and closing stroke of the hinge pin abuts in an end region of the elongated hole, while with increasing closing movement of the pressing pliers of the hinge pin slides more or less quickly towards the other end portion of the slot, so that changed for the toggle mechanism formed with the same components geometric Ratios and an altered power transmission results.
  • the components forming the toggle mechanism remain unchanged for the switching described above, whereby only limited possibilities exist with regard to the design possibilities of the different translations.
  • DE 198 34 859 C2 discloses a single toggle mechanism. Here is to enable an opening and closing stroke, for which no pressing of the die is possible, the pressure lever divided into two and integrated into the pressing tongs, that the effective length of the pressure lever is variable during the opening stroke.
  • DE-PS 1 527 910 discloses a pressing tongs with three hand levers.
  • a die is pressed into two partial strokes: in a first partial stroke, a first hand lever is pivoted relative to the second and third hand levers, which is accompanied by a relative movement of two jaws toward one another. Between the jaws, a die is deformed to an oval shape in the first partial stroke. With the completion of this first partial stroke, a relative movement of the second and third hand lever takes place toward each other. For this relative movement, the position of the aforementioned jaws does not change.
  • an additional third pressing member is translationally moved toward the die to form the die from the oval shape into a round configuration (back).
  • different pressing jaws or pressing elements become effective in the different partial strokes.
  • US 3,200,675 discloses a crimping tool for crimping an initially U-shaped compact by depressing the two side legs of the U into a waveform.
  • the pressing of the compact is carried out in two partial pressing strokes.
  • the pressing tongs has an anvil plate, on which two pressing jaws are mounted pivotably with a first pivot pin.
  • the pressing of the compact takes place between the anvil plate and increasingly with the pivoting of the pressing jaws on the anvil plate to moving pressing surfaces of the pressing jaws.
  • the pressing jaws are each connected with hand levers.
  • a coupling connection between the hand levers and the pressing jaws is designed such that for the movement of the hand lever in a partial pressing stroke away from each other and to the outside of the hand lever - are rigidly connected to the associated pressing jaw, while for the second partial pressing stroke with a movement of the hand lever toward each other and inwardly the hand lever have a degree of pivotal freedom relative to the pressing jaws.
  • the hand levers are moved apart for the first pressing partial stroke until the pressing surfaces of the pressing jaws have folded over the side limbs of the U of the compact in such a way that they are oriented parallel to the base limb of the U.
  • the first partial pressing stroke there is a change from the first partial pressing stroke to the second partial pressing stroke, for which the direction of movement of the hand lever is to be reversed, whereby the rigid connection between the hand levers and the pressing jaws is dissolved.
  • the hand levers are hinged articulated for the second partial pressing stroke via a second pivot pin on the pressing jaws.
  • two pressure levers are articulated to the pressing jaws via a third pivot pin, which in turn are connected in the pressing jaws facing away from end regions via a fourth pivot pin hinged together.
  • a coupling of the movement of the hand lever with the movement of the fourth pivot pin takes place via a locking connection coming into effect in the second partial pressing stroke with push rods.
  • These push rods are coupled via an effective in the second partial pressing stroke latching connection in the one end portion with the fourth pivot pin and pivotally connected via a fifth pivot pin on the hand levers in the area encompassed by the user's hand.
  • a complex drive mechanism is formed with the hand levers, the pressure levers, the push rods and the press jaws, which requires a plurality of pivot pins.
  • the locking device, the pressure levers and the pressure rods are moved "empty" with the hand levers and the pressing jaws, without these significantly influencing the force relationships.
  • the bringing about of the coupling between the push rods and the locking device requires a plurality of additional components with a guide of the locking device in the direction of the longitudinal axis of the pressing pliers, T-shaped between the hand lever supporting components and a spring arranged in the center axis of the pressing pliers.
  • knee lever mechanisms are used in both partial strokes.
  • the two kinematics are in each case toggle lever mechanisms with different knee joints, wherein different knee joints and the knee joint forming components have for the knee lever mechanisms.
  • the pressing tongs have a first hand lever, a second hand lever and a third hand lever.
  • kinematics are used for the first partial stroke, for which forces are applied to the first and second hand levers by the user.
  • From the first and second hand lever is a power transmission via the first kinematics in the first partial stroke to the pressing jaws.
  • the termination of the first partial stroke can be done according to the user or be given a priori, for example, by a stop of a hand lever or a component of the kinematics to a stop or to an adjacent component.
  • the user applies forces on the one hand to the first hand lever and on the other hand to the third hand lever with transmission of forces via the second kinematics to the pressing jaws.
  • the first and second partial lift can connect directly to each other or be partially overlapping.
  • the inventive concept can be outlined such that a pressing of the workpiece takes place in two partial strokes with two different, individually adapted pliers, which according to the invention these two pliers are combined into a pressing pliers.
  • individual components can be used multifunctionally for the use of both "pliers", which can result in a minimization of the material costs and a reduced total weight.
  • a switching device is provided, via which a changeover from the first kinematics to the second kinematics is made possible.
  • a switching device for example, a determination of a degree of freedom or a release of the same, a change in leverage ratios, a change in a pivot point o. ⁇ . Use.
  • a manual actuator is provided, via which the user can selectively make a switchover from the first kinematics to the second kinematics and / or vice versa.
  • This manual switching can be made possible by providing a suitable locking mechanism only for one end of the first partial stroke or during the entire partial stroke at the instigation of the user.
  • an automatic switching from the first kinematics to the second kinematics takes place.
  • This can, for example, be movement-controlled for reaching the end of the first partial stroke.
  • the changeover is force-controlled, for example, when a threshold value of the pressing force is exceeded at the pressing jaws with the first partial stroke.
  • an additional manual actuator for a kind of bridging an automatic switching from the first kinematics to the second kinematics is possible.
  • the invention proposes according to a further embodiment that the pressing jaws have a (maximum) open position in a closed position of the hand lever. This is an advantage if the crimping tool is to be pushed over a workpiece in cramped conditions. Here a bulky, bulky opening of the hand lever would be a hindrance.
  • a hand lever in the first partial stroke, is pivotably articulated in one end region on a pendulum support, while the other end region of the pendulum support is articulated pivotably on a pressing jaw.
  • the pendulum support and hand lever form a toggle.
  • one or the other hand lever is articulated directly pivotable on the pressing jaw. In this case, the other hand lever and the pressing jaw form a toggle.
  • a pendulum support in the context of the invention is understood in a first approximation rod-shaped, curved or rectilinear force transmission element, which preferably transmits a force from one end region to the opposite end region.
  • the switching device is designed such that it sets the pivoting degree of freedom of the aforementioned pendulum support relative to the hand lever (at least in one direction of movement). This causes an extension of the hand lever up to the pressing jaw.
  • a limitation of the partial stroke can take place and / or, on the other hand, a unilateral determination of a degree of freedom can take place.
  • another stop to the effect to which the toggle, the pendulum support and / or a toggle and pendulum joint connecting joint against the direction of movement for the first partial stroke comes to rest.
  • the degree of freedom is limited in the opposite direction.
  • the further stop can come into effect, for example, by manual actuation of the actuating member by the user.
  • the stop automatically, for example, by a motion or force controlled stop element comes into effect.
  • a displacement-degree of freedom of the actuator is released controlled by reaching the end of the first part of stroke, with the end of the first part stroke, the actuator by an applied energy storage, such as. A spring, in motion, so that the further stop to the effect comes.
  • the abovementioned stops 2 ° to 10 °, in particular 3 ° to 4 ° come before or after an extended position of the toggle mechanism to effect.
  • This can u. U. a large stroke - and thus a large angle range of the toggle lever - be exploited.
  • an end position for complete extension of the toggle lever is avoided, which could represent a blocking position and / or uncontrolled states of motion with a "snap" from the extended position could result in both directions.
  • the hand lever has a stop mechanism.
  • the known from the aforementioned prior art embodiments and advantages in the present invention can be integrated.
  • About the stop mechanism parts of the hand lever with different angular orientations to each other, in particular in two or more angular orientations can be fixed.
  • embodiments of the invention find use for a crimping pliers with a length that is smaller than 800 mm.
  • An interpretation of said knee lever drives is such that at manual forces of a user who are smaller than 400 N, a pressing force of more than 50,000 N, in particular more than 60,000 N, can be brought. With such relatively small dimensions of a pressing tongs, the mentioned pressing forces could hitherto not be brought about for the pressing tongs known from the prior art.
  • the pressing tongs in the region of the pressing jaws, press dies or die halves which have a diameter for a fitting of at least 20 mm, in particular at least 25 mm, 28 mm or 32 mm. According to the state of the art, such large fittings could not be pressed with manually operated pressing tongs - on the contrary, they were primarily used for hydraulic press devices.
  • a hand-operated crimping tool is used for the first time for pressing a fitting made of copper or stainless steel, wherein pressing forces are generated which are greater than 40,000 N, in particular greater than 50,000 N, 55,000 N or 60,000 N.
  • the applied pressing forces depending on the rigidity of the fitting which in turn may depend on the stiffness of the material chosen for the fitting and on the wall thickness of the fitting.
  • the present invention for the first time extends the use of manually operated pressing tongs to the pressing of fittings with larger required pressing forces. This can u. It may even be the case with hand forces smaller than 400 N and with the use of a crimping tool according to the invention which has a total length less than 800 mm or even less than 700 mm or even 600 mm.
  • a pressing tongs 1 serve for example for pressing press dies, sockets, pipes, electrical contacts, cable lugs, fittings and similar workpieces. This is done by pressing by manual operation, d. H. Application of forces by a user without the need for electrical, pneumatic or hydraulic power assistance.
  • the pressing tongs 1 preferably has a length which is less than 800 mm, in particular less than 700 or 600 mm. With manual forces of a user smaller than 400 N, crimping force 1 can be used to produce pressing forces greater than 40,000 N, in particular 50,000 N or 60,000 N. When using crimping pliers 1 for crimping a fitting, this can be used for fittings with a diameter of more than 20 mm, in particular more than 25 mm or 28 mm or 32 mm.
  • Fig. 1 to 5 show a pressing tongs 1 with three hand levers 2, 3, 4.
  • the result of Fig. 1 to 3 shows a working stroke of the pressing tongs from an open position according to Fig. 1 with a first partial stroke to a center position according to Fig. 2 and a second partial stroke from the center position according to Fig. 2 in a closed position according to Fig. 3 ,
  • the pressing tongs 1 has pressing jaws 5, 6, which are pivotally connected to each other via a hinge 7 to allow an opening and closing movement.
  • the hand lever 2 is articulated directly on the hinge 7. Furthermore, the hand lever 2 carries between the actuated by the hand of the user end portion of the hand lever 2 and the joint 7 another joint 10. Between the joints 7, 10, the hand lever 2 has an extension, directed away from the line connecting the joints 7, 10 away is.
  • the hand lever 3 is formed in the press jaw 6 facing end portion with a crank 12, so that this parallel to the hand lever 2 by approximately 30 ° - 60 ° away from this kinks.
  • this end region of the hand lever 2 via a hinge 11 to the pressing jaw 6 is pivotally connected.
  • the region of the crank 12 of the hand lever 3 is connected via a hinge 13 with an end portion of a pressure lever 14.
  • the hand lever 4 is also in the press jaws 5, 6 facing end portion in the region of a crank 15 angled slightly outward, preferably at an angle about 10 ° to 25 °.
  • the hand lever 4 is pivotably connected via the joint 10 to the end region of the pressure lever 14 opposite the joint 13.
  • the end region of the hand lever 4, which is opposite to the end region acted upon by the user, is connected via a joint 16 to a pendulum support 17, which in turn is articulated to the pressing jaw 5 in an opposite end region via a joint 18.
  • the pressure lever 14 with two struts 19, 20 are formed, which are arranged on both sides of the hand lever 3, 4 and are each connected to the joints 10, 13.
  • the pendulum support 17 In the region of the bearing 16, the pendulum support 17 is fork-shaped and surrounds on both sides the hand lever 4.
  • the pivot axes of the joints 11, 13 , 10, 16, 18 and 7 are parallel to each other and from the drawing plane gem. Fig. 1 to 5 oriented out.
  • the axis formed by the pendulum support 17 does not extend through the joint 7, but has a lever arm with respect to this, the normal force in the pendulum support - and thus the translated actuation force of the user on the hand lever - is converted to a moment acting on the pressing jaw 7, which acts in the direction of a closure of the pressing jaws 5, 6.
  • the translation of the operating force of the user to an increased pressing force in the region of the pressing jaw 5 depends in particular on the location of the joint 10 between the end regions of the hand lever 4 and said lever arm of the pendulum support 17.
  • a stop pin 76 ensures that the position of the pressing jaw 6 relative to the hand lever 2 is fixed on one side such that the pressing jaw 6 from the in Fig. 1 sketched opening position relative to the hand lever 2 can not be pivoted further in the opening direction, while a closing movement of the pressing jaw 6 in the second partial stroke is possible.
  • the stop pin 76 may be supported during the first partial stroke on the underside of the hand lever 2.
  • the transition from the first partial stroke to the second partial stroke which is a further closure of the in Fig. 2 shown center position to the in Fig. 3 illustrated closed position causes.
  • the hand lever 2, 4 fixed to each other.
  • a fixing device may be provided which, for example in the region of the hand lever 2, 4, the joint 16, the joint 18, the pressing jaw 5 and / or the pendulum support 17, a one- or two-sided limitation of the movement of the hand lever 2, 4 to each other guaranteed.
  • the switching device can be manually operated by the user and / or automatically with reaching the in Fig. 2 shown center position force or operated away.
  • the components 2, 4, 17, 5 form a solid pliers half, in which the degrees of freedom due to the joints 16, 18 are fixed.
  • the hand lever 2, 4 on the one hand and the hand lever 3 on the other hand pressed by the user to each other.
  • Transverse forces which are applied by the user to the hand lever 3 are transmitted (translated in accordance with the lever conditions on the hand lever 3) with a component on the pressing jaw 6, which is oriented vertically to the connecting axis between the joints 7, 11, wherein the distance between the joints 11, 7 forms a lever arm for the aforementioned component.
  • said component generates a moment for the pressing jaw 6, which acts around the joint 7 and is oriented in the direction of a closure of the pressing jaws 5, 6.
  • the translation of the force exerted by the user on the hand lever 3 force to an increased pressing force is dependent on the distance of the bearing 13 of the bearing 11, the crank of the hand lever and the distance of the joints 7, 11.
  • Exemplary embodiments of the dimensions, angles and geometries The listed components can be found in Fig. 1 apparent, scaled dimensions are taken.
  • the toggle mechanism 21 is effective for the second partial stroke.
  • Fig. 3 Upon reaching the closed position according to Fig. 3 are all hand lever 2, 3, 4 arranged parallel to each other and with minimum distance from each other.
  • a return of the pressing tongs 1 from the closed position according to Fig. 3 takes place via the center position according to Fig. 2 in the open position according to Fig. 1 , wherein the actuating forces, directions of movement and partial strokes are reversible.
  • a switching device for fixing the hand lever 2, 4 during the second partial stroke to each other it is possible that, for example, an actuation of the switching device in the course of a closing movement of Pressing the operation thereof automatically, while this must be manually operated for a return to the open position (or vice versa).
  • Fig. 4 and 5 show an alternative way of operating the crimping pliers according to Fig. 1 to 3 , for which - starting from the center position according to Fig. 2 -
  • the hand lever 4 for an opening of the pressing jaws 5, 6 with respect to the hand lever 2 is further deflected upward, see. Fig. 4 .
  • Fig. 4 shows an alternative opening position of the pressing tongs 1, for which a first partial stroke ( Fig. 4 ⁇ Fig. 5 ) can begin.
  • a first partial stroke Fig. 4 ⁇ Fig. 5
  • Fig. 5 shows for this alternative closing movement reaching a center position for which a second partial stroke begins.
  • the hand levers 2, 3 do not change their relative position, while the hand lever 4 is operated on the hand lever 2 (and on the hand lever 3).
  • the operation of the hand lever 4 inward, however, - deviating from the first partial stroke of Fig. 1 to Fig. 2 - Applied to the hinge 16 to the outside, whereby an application of the pendulum support 17 is connected to a compressive force, which in turn has a component which generates a closing torque for the pressing jaw 5 with respect to the lever arm between the joints 7, 18.
  • the toggle mechanism 22 is effective in the second partial stroke
  • 6 to 20 show a further embodiment of a pressing tongs 30 or individual parts thereof, whose function in principle with the pressing tongs according to Fig. 1 to 5 is comparable.
  • the pressing tongs 30 has only two hand lever 31, 32, wherein the hand lever 31 in this case, the functions of the hand lever 2, 4 for the pressing tongs according to Fig. 1 to 5 takes over by this switchable via a switching device 33.
  • the pliers head 75 of the pressing pliers 30 is shown in an enlarged view in Fig. 7 to recognize.
  • corresponding components are provided with the same reference numerals, has been omitted for corresponding embodiments and connections to adjacent components to a new description.
  • the hand lever 31 has an end piece 34 which is connected via fasteners 35 rigidly connected to a handle 52 of the hand lever 31.
  • the end piece 34 is connected via the hinge 10 to a in the illustration according to Fig. 7 essentially hidden, but in detail in the Fig. 18 to 20 shown holding plate or guide plate 36 hinged.
  • the guide plate 36 is a with the pliers head 75 of the pressing tongs 1 according to Fig. 1 shortened hand lever 2 comparable, which is extended in the fixed switching position of the switching device 33 via the hand lever 32.
  • In the handle portion 52 facing away from the end portion 34 is hingedly connected via the hinge 16 with the pendulum support 17.
  • Fig. 7 an actuator 37 to recognize which is part of the switching device 33 and whose function will become apparent from the following description.
  • the actuator 37 is L-shaped with a vertical base leg 38 and a side leg 39, wherein the base leg 38 in the side leg opposite end portion 39 has an angled at about 60 ° to 80 ° actuating portion 40 whose top has a trough 41, via which the actuating member 37, for example with a thumb, in the direction of the longitudinal axis of the base leg 38 can be actuated.
  • the side leg 39 has in its base leg 38 opposite end portion transverse to the plane according to Fig. 11
  • the actuator 37 has in the region of the base leg 38 extensions in the form of guide flanks 44, 45.
  • the actuator 37 has in the region of its base leg 38 has a longitudinally extending, continuous groove 46, in the transition region to the side legs 39 passes and ends in the side legs 39 with a contact surface 47.
  • On the underside of the side legs 39 has a blind hole 48th
  • the end piece is in a first approximation Y-shaped, wherein a base leg 49 of the Y is formed in a straight line with two holes 50, 51 which allow attachment of the end piece 34 to the handle 52.
  • a flat bearing surface 54 is formed, while the leg 53 is rounded on the opposite side of the contact surface 54 and merges into the base leg 49.
  • the other leg 55 of the Y forms a bearing eye 56 for the joint 16.
  • the end piece 34 has a bore 57 for the joint 10th
  • the guide plate 36 has in its end regions in each case a receptacle or bore 58, 59 for the joint 10 and the joint 7. Furthermore, in the guide plate, a guide groove 60 is introduced, according to Fig. 17 goes from a top to a bottom and opposite the connection axis the holes 58, 59 is inclined.
  • the guide groove 60 is rectilinear. Furthermore, a slightly curved, not to the bottom continuous guide groove 61 is inserted into the guide plate 36 from the top in the guide plate 36.
  • the guide groove 61 ends with a groove end 63.
  • a third guide groove 62 is provided in the interior of the guide plate 36 and thus bounded on both sides.
  • Fig. 7 shows the crimping tool 30 in the assembled state, wherein for two on both sides of the pliers head 75 arranged guide plates 36, the upper guide plate 36 has been removed to gain insight into the interior of the pliers head.
  • the guide flanks 44, 45 are each guided in guide grooves 60 of the guide plates 36, resulting in a guide of the actuating member 37 in the direction of the guide groove 60.
  • the extensions 42, 43 are guided in the guide groove 62.
  • a compression spring is biased so supported that for the most relaxed compression spring, the actuator is pushed upwards out of the guide plate 36 that the projections 42, 43 abut the upper edge of the guide groove 62. This position of the actuator 37 is in Fig. 6 and 7 to recognize.
  • the hinge 16 Inwards.
  • a bearing pin 64 of the joint 16 occurs with increasing pivoting into the groove 61 until for the end of the first partial stroke of the bearing pin 64 comes to rest on the Nutende 63, whereby a fixed end position for the first partial stroke is predetermined.
  • the groove end 63 thus forms a one-sided stop for limiting the pivoting between the hand lever 31, pendulum support 17, guide plate 36 and pressing jaw 5, which prevents a relative movement of the hand lever 31 relative to the hand lever 32 further outwards.
  • a fixation in the opposite direction is additionally as follows: with increasing pivoting of the hand lever 31 and movement of the joint 16 inwardly, the leg 53 of the end piece 34 continues to approach the side leg 39 of the actuator 37 until the leg 53 comes with its rounded boundary surface on top of the side leg 39 to the plant. With further pivoting with the first partial stroke then presses the leg 53, the side legs 39 and thus the actuator 37 down along the guide grooves 60, 62, which is accompanied by an application of the compression spring, not shown.
  • the kinematics are essentially in accordance with the patent DE 103 46 241 B3 formed, for which both a Zwangsgesperre 65 and a Anschlaggesperre 66 may be used on the moving pliers part.
  • the hand lever 32 is formed with a partial lever 67, in the region of the hand lever 32 is connected to the hinge 11.
  • the angle between the handle 74 of the hand lever 32 and the partial lever 67 can be changed independently of the position of the pressing jaws 5, 6 as follows: this has the part lever 67 in the handle portion 74 facing area stops 68, in series or arcuately arranged and formed on the circumference of the first partial lever 67.
  • the stops 68 work in stages with a manually operated spring-loaded ratchet 69 together.
  • the ratchet device 69 has a locking member 70 which is loaded via a spring, not shown, in the direction of the stops 68.
  • the contours of the stops 68 and the locking member 70 are adapted such that for actuation of the hand lever 31, 32 to each other to a stop 68 and the locking member 70 form a locking connection, so that in this direction, the angular position between part lever 67 and the handle 74 of the hand lever 32 is fixed.
  • a movement of the hand lever 32, 31 away from each other causes a slope of an adjacent stop 68, the locking member 70 pushes back under application of the spring until the locking member 70 engages in an adjacent stop 68.
  • tooth segments 71 are provided with respect to the joint 13 at the periphery of the partial lever 71, which cooperate with a spring-loaded against the pressure lever 14 supported locking element 72.
  • the contours of the locking element 72 and the toothed segments 71 are formed such that with a movement of the hand lever 31, 32 successively locks the locking element in adjacent tooth segments 71, wherein the Zwangsgesperre 65 due to the contours of the toothed segments 71 and the blocking element 72 a movement the hand lever 32, 31 away from each other - and thus a Wiederaufschwenken the pressing jaws 5, 6 - is blocked.
  • Further design possibilities and / or details of a forced compounding system 65 can be taken from the prior art mentioned at the outset and the state of the art available on the market in relation to pressing tongs with a force-locking mechanism 65.
  • the hand lever 31, 32 can be covered by one or both hands of the user, the hand lever can be moved toward each other at the beginning of the partial stroke as a result of the Anschlaggesperres for unchanged position of the pressing jaws 5, 6, resulting in a movement of the locking member 70 to the outer Stop 68 correlates.
  • a movement of the pressing jaws 5, 6 can be achieved to each other, wherein a once reached position of the pressing jaws 5, 6 is secured by the Zwangsgesperre 65
  • the Anschergesperre 66 is actuated such that the locking member 70 with a adjacent stop 68 cooperates.
  • the pressing jaws 5, 6 can be further approximated to each other under securing by the Zwangsgesperre. This process is repeated for a few pressing stages, for example six, seven, eight, nine, ten or more than ten pressing stages.
  • the blocking element 72 passes into a depression 73 of the partial lever 67.
  • the blocking element 72 can again be inserted into the recess Fig. 7 be shown returned initial position.
  • the ratchet device 69 can also be operated manually.
  • the stopper locking in its maximum, outwardly angled position, so that the pivoting degree of freedom between the partial lever 67 and the handle 74 is blocked.
  • the function of the pressing tongs 30 can be explained as follows:
  • the pressing tongs 30 has the opening position with maximum die halves removed from each other. In this open position, the hand lever 31, 32 are at a minimum distance, so that the pressing tongs 30 can be brought over a workpiece even in confined space conditions.
  • the hand lever 2, 3, 4 of the pressing tongs can be tapered in the direction of the end portions opposite the pliers head with increasing the distance of the inner sides of the hand lever at parallel outer sides of the hand lever. In this way, taking into account the bending stress of the hand lever material and weight can be saved. On the other hand, this can be made possible that the hand lever can be further approximated to each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Press Drives And Press Lines (AREA)

Claims (18)

  1. Pince de serrage (1 ; 30) pour serrer des matrices de pressage, des douilles, des tubes, des contacts électriques, des cosses de câble, des raccords et autres pièces similaires, comportant
    a) au moins deux leviers manuels (2, 3, 4 ; 31, 32) mobiles l'un par rapport à l'autre,
    b) dans la zone de la tête de pince (75), deux mâchoires de serrage (5, 6) à faire pivoter l'une vers l'autre par une course de travail en vue du serrage,
    c) une cinématique pour la transmission des forces, appliquées sur les leviers manuels (31, 32) par un utilisateur, vers les mâchoires de serrage (5, 6),
    d) la course de travail des deux mâchoires de serrage (5, 6) comportant une première course partielle et une deuxième course partielle,
    e) une force de serrage est générée dans les deux courses partielles moyennant l'utilisation de cinématiques différentes, et
    f) les leviers manuels (2, 3, 4 ; 31, 32) pivotent l'un par rapport à l'autre dans des directions différentes pour les deux courses partielles, caractérisée en ce que
    g) dans la première course partielle et la deuxième course partielle, la fermeture des mâchoires de serrage (5, 6) est effectuée par l'intermédiaire d'un mécanisme à genouillère (21, 22).
  2. Pince de serrage (1 ; 30) selon la revendication 1, caractérisée en ce que les cinématiques sont réalisées respectivement sous la forme de mécanismes à genouillère (21, 22), dans lesquelles la genouillère est formée par différentes articulations (11, 16).
  3. Pince de serrage selon la revendication 1, caractérisée en ce qu'il est prévu trois leviers manuels (2, 3, 4).
  4. Pince de serrage selon la revendication 1 ou 2, caractérisée en ce qu'il est prévu un dispositif de permutation (33), par lequel il est possible de passer de la première cinématique à la deuxième cinématique et/ou inversement.
  5. Pince de serrage selon la revendication 4, caractérisée en ce que la permutation dans le dispositif de permutation (33) réside dans la définition d'un degré de liberté.
  6. Pince de serrage selon la revendication 4 ou 5, caractérisée en ce qu'il est prévu un organe de manoeuvre (37) manuel, lequel fait passer de la première cinématique à la deuxième cinématique et/ou inversement.
  7. Pince de serrage selon la revendication 4 ou 5, caractérisée en ce qu'il se produit une permutation automatique de la première cinématique à la deuxième cinématique et/ou inversement.
  8. Pince de serrage selon la revendication 1, 2, 4, 5, 6 ou 7, caractérisée en ce que les mâchoires de serrage (5, 6) ont une position d'ouverture lorsque les leviers manuels (31, 32) sont dans la position de fermeture.
  9. Pince de serrage selon la revendication 1, 2, 4, 5, 6, 7 ou 8, caractérisée en ce que
    a) dans la première course partielle, un levier manuel (31) est articulé dans une zone d'extrémité de manière pivotante sur un support oscillant (17), alors que l'autre zone d'extrémité du support oscillant (17) est articulée de manière pivotante sur une mâchoire de serrage (5), le support oscillant (17) et le levier manuel (31) formant un mécanisme à genouillère (22), dans lequel la « genouillère » est formée par l'articulation (16) entre le support oscillant (17) et le levier manuel (31),
    b) tandis que dans la deuxième course partielle, un autre levier manuel (32) est articulé de manière pivotante directement sur la mâchoire de serrage (6), l'autre levier manuel (32) et la mâchoire de serrage (6) formant un mécanisme à genouillère (21), dans lequel la « genouillère » est formée par l'articulation (11) entre le levier manuel (32) et la mâchoire de serrage (6).
  10. Pince de serrage selon la revendication 9 avec renvoi à l'une des caractéristiques 4 à 8, caractérisée en ce que le dispositif de permutation (33) définit le degré de liberté de pivotement du support oscillant (17) par rapport au levier manuel (31) dans la zone d'extrémité détournée de la mâchoire de serrage (5).
  11. Pince de serrage selon la revendication 10, caractérisée en ce que
    a) pour une permutation à la fin de la première course partielle, une pièce d'extrémité (34) du levier manuel (31), le support oscillant (17) et/ou une articulation (16) reliant la pièce d'extrémité (34) et le support oscillant (17) viennent en appui contre une butée (extrémité de rainure 63) dans le sens du mouvement pour la première course partielle, et
    b) une autre butée (surfaces d'appui 47, 54) entre en action, sur laquelle la pièce d'extrémité (34), le support oscillant (17) et/ou une articulation (16) reliant la pièce d'extrémité (34) et le support oscillant (17) viennent en appui, dans le sens contraire au sens de mouvement pour la première course partielle.
  12. Pince de serrage selon la revendication 11, caractérisée en ce que les butées (extrémité de rainure 63 ; surfaces d'appui 47, 54) entrent en action de 2° à 10°, en particulier de 3° à 4°, avant ou après une position d'extension du mécanisme à genouillère.
  13. Pince de serrage selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un levier manuel (32) comporte un bloqueur de butée (66), par lequel des parties du levier manuel (32) peuvent être immobilisées les unes par rapport aux autres avec des orientations angulaires différentes.
  14. Pince de serrage selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu un bloqueur forcé (65) pour l'immobilisation unilatérale des positions intermédiaires définies des mâchoires de serrage (5, 6) pendant la course de travail.
  15. Pince de serrage selon l'une quelconque des revendications précédentes, caractérisée en ce que le bloqueur forcé (65) est actif uniquement dans une deuxième course partielle, dans laquelle les mâchoires de serrage (5, 6) sont davantage fermées que dans la première course partielle.
  16. Pince de serrage selon l'une quelconque des revendications précédentes, caractérisée en ce que la longueur d'encombrement de la pince de serrage (1 ; 30) est inférieure à 800 mm et la conception des mécanismes à genouillère (21, 22) est choisie de telle sorte que des forces manuelles d'un utilisateur, lesquelles sont inférieures à 400 N, peuvent induire une force de serrage de plus de 50 000 N, en particulier de plus de 60 000 N.
  17. Pince de serrage selon la revendication 16, caractérisée en ce que la pince de serrage (1 ; 30), dans la zone des mâchoires de serrage (5, 6), comporte des demi-matrices qui ont un diamètre pour un raccord d'au moins 20 mm, en particulier d'au moins 25 mm, 28 mm ou 32 mm.
  18. Utilisation d'une pince de serrage (1 ; 30) actionnée manuellement, selon l'une quelconque des revendications 1 à 17, pour serrer un raccord en cuivre ou en acier inoxydable avec des forces de serrage nécessaires, qui sont supérieures à 40 000 N.
EP07024617A 2007-01-08 2007-12-19 Pince de serrage destinée au serrage d'outils Not-in-force EP1941975B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007001235A DE102007001235B4 (de) 2007-01-08 2007-01-08 Presszange zum Verpressen von Werkstücken

Publications (3)

Publication Number Publication Date
EP1941975A2 EP1941975A2 (fr) 2008-07-09
EP1941975A3 EP1941975A3 (fr) 2009-05-13
EP1941975B1 true EP1941975B1 (fr) 2011-06-08

Family

ID=39226778

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07024617A Not-in-force EP1941975B1 (fr) 2007-01-08 2007-12-19 Pince de serrage destinée au serrage d'outils

Country Status (5)

Country Link
US (1) US8127589B2 (fr)
EP (1) EP1941975B1 (fr)
JP (1) JP5214254B2 (fr)
AT (1) ATE511955T1 (fr)
DE (1) DE102007001235B4 (fr)

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Also Published As

Publication number Publication date
ATE511955T1 (de) 2011-06-15
US8127589B2 (en) 2012-03-06
DE102007001235B4 (de) 2010-06-02
EP1941975A3 (fr) 2009-05-13
EP1941975A2 (fr) 2008-07-09
JP5214254B2 (ja) 2013-06-19
DE102007001235A1 (de) 2008-07-17
JP2008168425A (ja) 2008-07-24
US20080163664A1 (en) 2008-07-10

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