EP1763420A1 - Outil de serrage et/ou d'ecartement comprenant un barre de poussee ou de traction - Google Patents

Outil de serrage et/ou d'ecartement comprenant un barre de poussee ou de traction

Info

Publication number
EP1763420A1
EP1763420A1 EP05743515A EP05743515A EP1763420A1 EP 1763420 A1 EP1763420 A1 EP 1763420A1 EP 05743515 A EP05743515 A EP 05743515A EP 05743515 A EP05743515 A EP 05743515A EP 1763420 A1 EP1763420 A1 EP 1763420A1
Authority
EP
European Patent Office
Prior art keywords
clamping
push
tool according
absorption
pull rod
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.)
Granted
Application number
EP05743515A
Other languages
German (de)
English (en)
Other versions
EP1763420B1 (fr
Inventor
Manfred Geier
Ralf Strauss
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.)
Irwin Industrial Tools GmbH
Original Assignee
Irwin Industrial Tools GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE102004024862A external-priority patent/DE102004024862A1/de
Application filed by Irwin Industrial Tools GmbH filed Critical Irwin Industrial Tools GmbH
Priority to EP05743515A priority Critical patent/EP1763420B1/fr
Publication of EP1763420A1 publication Critical patent/EP1763420A1/fr
Application granted granted Critical
Publication of EP1763420B1 publication Critical patent/EP1763420B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/068—Arrangements for positively actuating jaws with at least one jaw sliding along a bar

Definitions

  • the invention relates to a clamping and / or spreading tool with a push or pull rod, to which a movable jaw is attached, a fixed jaw, a gear mechanism with which the movable jaw by displacing the push or pull rod in a clamping or spreading direction on the stationary jaw to or from the latter is movable and clamping and / or spreading forces can be applied between the jaws, and a lock that blocks a shift of the push or pull rod towards the clamping or spreading direction opposite to the opening direction to between the To maintain jaws generated clamping or spreading forces.
  • Such a clamping or spreading tool is known from DE 103 35 365 AI, with which very large clamping forces can be generated between the fixed and movable jaw.
  • the swivel arm is pivotally articulated on a clamping side of the push or pull rod on a carrier holding the stationary jaw, the contact point at which the actuating arm can introduce actuating forces into a driving slide of the gear mechanism, also on the clamping side of the push or pull rod between the Swivel joint and the push or pull rod is provided.
  • the push or pull rod together with the movable jaw can slide through the carrier by releasing very large clamping forces, which is not only that damage the workpiece to be machined but can also injure an operator.
  • a clamping and / or spreading tool with a push or pull rod to which a movable jaw is attached, a stationary jaw, a gear mechanism with which the movable jaw by displacing the push or pull rod in a clamping or spreading direction the stationary jaw can be moved to or away from the latter and clamping and / or spreading forces can be applied between the jaws, and provided with a lock which blocks a displacement of the push or pull rod in the opening direction opposite to the clamping or spreading direction, in order between the jaws maintain generated clamping or spreading forces.
  • a conventional non-return lock as described in DE 39 17 473 AI, or a correspondingly tilted slider relative to the push or pull rod, which is designed as a clamping plate due to its tilting, can be regarded as a lock Shifting the push or pull rod can lock.
  • the clamping and / or spreading tool comprises a mechanism for reducing the stored clamping and / or spreading forces, which permits a particularly controlled absorption displacement of the push or pull rod in the opening direction along a predetermined, limited absorption path.
  • the limitation of the absorption shift is realized by a locking action of the mechanism, which only starts when the push or pull rod is displaced beyond the predetermined absorption path and blocks a further absorption shift of the push or pull rod in the opening direction relative to the fixed jaw.
  • the absorption displacement limit can be released in order to to ensure that the push or pull rod can be moved without blocking for quick adjustment of the jaws.
  • the stored clamping and / or spreading forces cause no extensive catapult-like displacement of the push or pull rod when they are canceled.
  • the jaws are preferably moved only slightly, in particular a few millimeters, without preferably losing contact with the workpiece, in the opening direction.
  • at least a part, preferably the entirety, of the tensioning and / or spreading forces is reduced, in particular by friction or damping.
  • the part of the clamping and / or spreading forces which has not been broken down is held again by the locking action of the mechanism which begins after absorption absorption. In this way, the reduction of the stored clamping and / or spreading forces can be controlled, and the absorption displacement of the push or pull rod when releasing the clamping forces is limited to a desired level.
  • the mechanism can be activated by an operator, in particular by its actuation, that after activation, the absorption displacement of the push or pull rod in the opening direction along the absorption path is independently permitted and operated, and an absorption displacement limitation takes effect automatically after the absorption displacement ,
  • the mechanism can preferably be activated only after the blocking action of a lock, in particular a non-return lock, has been released.
  • the mechanism should only be able to be activated by releasing the tensioned clamping and / or expanding tool, in particular the lock tensioned by clamping and / or expanding forces.
  • the mechanism should preferably be or remain inactive in the unclamped clamping and / or spreading tool, in particular in the unclamped lock.
  • the lock in order to provide the absorption shift, can be moved essentially in the opening direction relative to the stationary jaw while maintaining the locking effect. Under the blocking effect of the lock that a displacement movement of the push or pull rod in the opening direction is blocked relative to the lock itself.
  • the lock is moved as such, a movement of the push or pull rod in the opening direction is permitted, which movement represents the predefined absorption shift.
  • the lock is arranged so that it can move in the opening direction in a carrier that carries the fixed jaw, the slide or pull rod is displaceably mounted, in such a way that its locking effect is retained when moving.
  • a known clamping and / or spreading tool could be further developed with a mechanism according to the invention in that the mounting of the spring-loaded release lever of the non-return mechanism relative to the carrier carrying the fixed jaw, in particular in the opening direction is designed to be displaceable, for example, by an eccentric turned part to be actuated by the operator.
  • the spring travel of the elastically tensioned system which is defined by elastically deformable clamping jaw parts of the tensioning and / or expanding tool, is at least partially shortened, if necessary completely, and the elastic tensioning forces are reduced.
  • the lock can preferably be moved from a rest position, in which it is in particular forced when the mechanism is activated, into an end-of-absorption position in which its blocking action begins.
  • the locking action of the lock prevents the push or pull rod from being displaced relative to the lock, but the push or pull rod including the lock can move in the opening direction relative to the fixed jaw.
  • the displaceability of the lock can be limited in particular by a stop formed on the carrier.
  • a displacement path which the barrier travels during the absorption shift is preferably approximately the same or at least proportional to the predetermined absorption path.
  • the mechanism comprises a drive for moving the lock with the push or pull rod locked thereon in the opening direction.
  • a drive to be implemented by the operator can be provided, which has an eccentric bearing for the lock.
  • To implement an automated drive at least part of the stored tensioning and / or spreading forces are introduced into the lock to be moved.
  • the locking effect of the lock can be realized by forcing a plate lock with the push or pull rod to lock a displacement of the push or pull rod in the opening direction.
  • the mechanism preferably comprises two plate locks which can block the push or pull rod in the opening direction, one of which - while maintaining their forced tilting - can be moved or moved in the opening direction, in particular parallel to the push or pull rod, in order to provide the absorption shift relative to the fixed jaw the other - if the compulsory canting is maintained - is fixed to the fixed jaw.
  • the forced canting of the fixed plate lock can be removed before the canting of the displaceable locking plate, in particular offset in time and / or away.
  • the released clamping and / or spreading forces can be introduced into the displaceable or translationally mounted plate lock, which cause the displacement or displacement of the movable plate lock from a starting position into an end position, in which a further displacement is prevented is.
  • the displaceable plate lock comprises a clamping plate which is forcibly tilted against the push or pull rod, so that a displacement of the push or pull rod in the opening direction is blocked relative to the clamping plate, and which bears against a movable contact point.
  • the clamping plate can be a driving slide of the gear mechanism formed as a step mechanism, and the movable contact point is realized by a point on the movable actuating arm of the step mechanism for transmitting the actuating force into the driving slide.
  • the actuating arm can have a central position, into which the actuating arm is unloaded by the operator, a stroke end position into which the actuating arm can be moved by an operator when it is actuated for moving the push or pull rod in the tensioning or expanding direction, and an opposite position to the stroke end position
  • the mechanism comprises a damper which dampens the absorption displacement of the push or pull rod along the absorption path.
  • the damper is preferably only activated when the mechanism for an absorption displacement of the push or pull rod in the opening direction is activated.
  • the damper can be formed by a compensating spring, in particular a compression spring, which can be tensioned in the opening direction by moving the lock.
  • the compensating spring can be arranged between a carrier holding the stationary jaw and the actuating arm.
  • the damper can be formed by a snap device, in which the released clamping or spreading forces are dampened by friction when snapping in and out.
  • the compensating spring and a gear spring for tilting the driving slide are preferably matched to one another in such a way that the actuating arm is forced into a central position from which a lifting movement for the gear mechanism against the gear spring and an absorption movement for the mechanism against the compensating spring is permitted.
  • the compensating spring tensioned in the absorption end position of the actuating arm can be relaxed in that the compulsory canting of the driving slide is removed, in particular the relaxing compensating spring urging the actuating arm into its central position.
  • Figure 1 is a side view of an unclamped clamping and / or spreading tool according to the invention with a housing open for free view and free cuts for better visibility of the interior of the stepping gear and the mechanism according to the invention.
  • FIG. 2 shows a side view of the tensioning and / or expanding tool according to FIG. 1 in a tensioned state, wherein a release lever has already been partially actuated, but does not yet release any tensioning forces;
  • FIGS. 1 and 2 show a side view of the clamping and / or spreading tool according to FIGS. 1 and 2, the mechanism according to the invention being in an intermediate phase in which the clamping forces are only partially released;
  • FIGS. 1 to 3 shows a side view of the clamping and / or spreading tool according to FIGS. 1 to 3, the mechanism according to the invention being in an end phase in which the clamping forces are completely eliminated;
  • Fig. 5 is a side view of the clamping and / or expanding tool according to FIGS. 1 to 4, wherein the release lever of the mechanism according to the invention is not actuated.
  • the clamping tool 1 shown in FIGS. 1 to 5 comprises a support body 3, on which a fixed jaw 5 is attached and which supports a push rod 7 displaceably in its longitudinal direction.
  • a push rod 7 displaceably in its longitudinal direction.
  • low-friction sliding sections 9 and 11 are provided on the support body 3 in the region of the end sides.
  • a movable jaw 13 is detachably fastened and, as shown in FIGS. 1 to 4, aligned with the stationary jaw 5 for a clamping tool configuration. If the movable jaw 13 is arranged at the other end of the push rod 7, this configuration forms a spreading tool, which is not shown in the figures.
  • a grip part 17 is formed on an actuating side 15 of the push rod 7.
  • An actuating arm 19 is articulated on the supporting body 3 such that pivoting of the actuating arm 19 onto the handle part 17 is possible.
  • the operating arm 19 is mounted on the support body 3 via a swivel joint 21, which lies on a clamping side 23 of the push or pull rod 7.
  • the actuating arm 19 has a cylindrical contact projection 25 below the swivel joint 21, which is in engagement with driving plates of a driving slide 27.
  • the driving slide 27 is part of a stepping mechanism to be actuated via the actuating arm 19 for displacing the push rod 7 in a spreading and / or tensioning direction S.
  • the stepping mechanism comprises a spiral compression spring 29 arranged on the tension side, which is pretensioned in a blind hole 31 in the support body 3 parallel to the push rod 7 is aligned.
  • the spiral compression spring 29 acts below the cylindrical contact projection 25 on the driving slide 27.
  • the spiral compression spring 29 is mounted in a pretensioned manner so that it pivots the driving slide 27 around the contact projection 25 in a clockwise direction, so that the driving slide 27 comes into positive engagement with the push rod 7.
  • the tilting of the driving slide 27 causes a movement of the push rod 7 relative to the driving slide 27 in an opening direction O opposite to the tensioning and / or expanding direction S is blocked.
  • the driving slide 27 has a locking effect, which blocks the displacement in the opening direction O and thus can hold the clamping forces generated between the jaws 5 and 13 when the contact projection 25 is fixed in the opening direction relative to the carrier 3.
  • the step mechanism also includes a non-return lock 35, which is formed by a clamping plate 37, which, like the driving slide 27, via a compression spring 39 arranged on the tension side and an actuatingly arranged secondary spring 43 around a fixed contact point 41 of the support body 3 in a canted locking engagement the push rod 7 is brought.
  • the paired arrangement of compression spring 39 and secondary compression spring 43 also has the effect that when the push rod 7 is displaced in the tensioning direction S, the clamping plate 37 is not displaced with the push rod 7 in the tensioning direction S due to friction.
  • the backstop 35 also includes a release lever 45, which can be operated by an operator, particularly with the index finger, and can engage the lower end (covered by the component 61) of the clamping plate 37 in order to cancel its canting.
  • the release lever 45 is in constant contact with a spring-loaded (47) plunger 49, which is mounted parallel to the push rod 7 in a longitudinal guide 51 inserted in the support body 3.
  • a return spring 47 is arranged between a projection 53 arranged essentially centrally on the plunger 49 and a stop surface 50 of the supporting body 3, which presses the plunger 49 toward the release lever 45 under pretension.
  • the basic concept of the mechanism according to the invention for reducing the stored clamping and / or spreading forces is to allow a predetermined absorption displacement of the push rod 7 in the opening direction O along a predetermined absorption path, wherein after the absorption path has been overcome a further displacement beyond the absorption path is blocked.
  • the absorption shift can be realized according to the invention by moving the lock blocking a shift of the push rod 7 in the opening direction, which is formed in the example shown in FIGS. 1 to 5 by the positively tilted driving slide 27.
  • the lock is displaceable because the driving slide 27 together with the push rod 7 tilted with it can be moved in the opening direction O due to the translationally pivotable in the longitudinal direction of the push rod 7 contact projection 27 of the actuating arm 19.
  • the mobility of the actuating arm 19 is created by a free space 67, which allows the actuating arm 19 to pivot clockwise from the central position shown in FIGS. 1 and 2 into an absorption end position (FIG. 3), in which the actuating arm 19 on a stop formed on the support body 3 69 triggers.
  • the compensating spring 61 is, taking into account the lever ratio to the swivel joint 21 and the lever ratio of the spiral compression spring 29 to the system projection 25 matched.
  • a large stroke pivot path of the actuating arm 19 towards the handle part 17 and a relatively small absorption pivot path x (FIG. 2) are provided for the absorption end position.
  • absorption swivel path x - that is, the path from the central position of the actuating arm 19 in its absorption end position - essentially corresponds to the absorption path of the push rod 7, during which the released tensioning forces are damped and reduced.
  • Fig. 2 the clamping tool 1 according to the invention is shown in the fully clamped state, i.e. the workpiece 63 is under a clamping load between the clamping jaws 5 and 13.
  • the clamping jaws 5, 13 and the clamped workpiece 63 form an elastic system, the modulus of elasticity of which is determined by the materials used.
  • the elasticity of the system should be indicated by the exaggerated elastic, dumbbell-shaped deformation of the workpiece 63.
  • the clamping forces acting between the clamping jaws 5 and 13 were generated by the stepping gear via the actuation of the actuating arm 19. If the operating arm 19 is released by the operator, not shown, the spiral compression spring 29 spends the Actuating arm 19 in its central position, which is shown in Fig. 2 and also in Fig. 1. The compensating spring 61 keeps the actuating arm 19 away from the stop 69.
  • the clamping forces are only held by the non-return lock 35.
  • the blocking action of the driving slide 27 is inactive because the tilted driving slide 27 cannot absorb any forces due to the displaceability of the contact projection 25 in the opening direction O.
  • the release lever 45 is actuated by the operator.
  • a first release stage which is indicated in FIG. 3
  • the release lever 45 is further pulled back beyond the intermediate position shown in FIG. 2 until the clamping plate 37 is removed from the canting with the push rod 7 by the release lever 45 against the lower end (not visible) presses the clamping plate 37 and the latter moves counterclockwise to a substantially vertical position.
  • the locking effect of the backstop 35 is released.
  • the elastic system of deformed clamping jaws and workpiece relaxes by releasing the push-back lock 35 and shifts the push rod 7 in the opening direction O relative to the support body 3.
  • the entraining slide 27 tilted on the push rod 7 is displaced in accordance with the absorption pivoting path x against the compensating spring 61, until the actuating arm 19 abuts the stop 69.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Jigs For Machine Tools (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Clamps And Clips (AREA)

Abstract

La présente invention concerne un outil de serrage et/ou d'écartement comprenant: un barre de poussée ou de traction (7) à laquelle est fixée une mâchoire mobile (13); une mâchoire fixe (5); un mécanisme d'engrenage qui permet le mouvement de la mâchoire mobile (13) par déplacement de la barre de poussée ou traction (7) dans une direction de serrage ou d'écartement (5), vers la mâchoire fixe (5) ou à l'opposé de celle-ci, et l'application de forces de serrage et/ou d'écartement entre les mâchoires (5,13); et un élément de verrouillage qui bloque le déplacement de la barre de poussée ou traction (7) dans une direction d'ouverture (O) opposée à la direction de serrage ou d'écartement (5), afin de conserver les forces de serrage et/ou d'écartement produites entre les mâchoire (5,13). Selon l'invention, pour permettre la dégradation des forces de serrage et/ou d'écartement accumulées, un mécanisme permet un déplacement d'absorption de la barre de poussée ou traction (7) dans la direction d'ouverture (O) sur une trajectoire d'absorption prédéterminée, et bloque, en particulier de façon réversible, un déplacement d'absorption de la barre de poussée ou traction (7) dans la direction d'ouverture (O), hors de la trajectoire d'absorption prédéterminée.
EP05743515A 2004-05-19 2005-05-12 Outil de serrage et/ou d'ecartement comprenant un barre de poussee ou de traction Expired - Fee Related EP1763420B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05743515A EP1763420B1 (fr) 2004-05-19 2005-05-12 Outil de serrage et/ou d'ecartement comprenant un barre de poussee ou de traction

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102004024862A DE102004024862A1 (de) 2004-05-19 2004-05-19 Spann- und/oder Spreizwerkzeug
PCT/EP2004/013979 WO2005115690A1 (fr) 2004-05-19 2004-12-08 Outil de serrage et/ou d'extension comprenant une tige de poussee ou de traction
PCT/EP2005/005193 WO2005113199A1 (fr) 2004-05-19 2005-05-12 Outil de serrage et/ou d'ecartement comprenant un barre de poussee ou de traction
EP05743515A EP1763420B1 (fr) 2004-05-19 2005-05-12 Outil de serrage et/ou d'ecartement comprenant un barre de poussee ou de traction

Publications (2)

Publication Number Publication Date
EP1763420A1 true EP1763420A1 (fr) 2007-03-21
EP1763420B1 EP1763420B1 (fr) 2009-10-14

Family

ID=34968073

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05743515A Expired - Fee Related EP1763420B1 (fr) 2004-05-19 2005-05-12 Outil de serrage et/ou d'ecartement comprenant un barre de poussee ou de traction

Country Status (3)

Country Link
EP (1) EP1763420B1 (fr)
AU (1) AU2005245096B2 (fr)
WO (1) WO2005113199A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170136606A1 (en) * 2014-07-04 2017-05-18 Hangzhou Great Star Tools Co., Ltd. Clamp
CN109849036A (zh) * 2019-04-08 2019-06-07 云南中烟工业有限责任公司 一种用于双臂机器人末端手爪更换的夹持装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19731579A1 (de) * 1997-07-23 1999-01-28 Wolfcraft Gmbh Spannwerkzeug, insbesondere Spannzwinge, Spannstock oder Spanntisch
WO2003013793A1 (fr) * 2001-08-10 2003-02-20 American Tool Companies, Inc. Serre-joints a vitesse variable et a pression augmentee et variable
US6474632B1 (en) * 2001-11-07 2002-11-05 Ferng-Jong Liou Driving mechanism for plank clamp
US6655670B1 (en) * 2002-09-05 2003-12-02 Ferng-Jong Liou Transmission mechanism for clamping device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005113199A1 *

Also Published As

Publication number Publication date
WO2005113199A1 (fr) 2005-12-01
EP1763420B1 (fr) 2009-10-14
AU2005245096A1 (en) 2005-12-01
WO2005113199A8 (fr) 2007-04-05
AU2005245096B2 (en) 2011-05-19

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