EP0894573B1 - Dispositif de serrage d'une pièce - Google Patents

Dispositif de serrage d'une pièce Download PDF

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Publication number
EP0894573B1
EP0894573B1 EP98106229A EP98106229A EP0894573B1 EP 0894573 B1 EP0894573 B1 EP 0894573B1 EP 98106229 A EP98106229 A EP 98106229A EP 98106229 A EP98106229 A EP 98106229A EP 0894573 B1 EP0894573 B1 EP 0894573B1
Authority
EP
European Patent Office
Prior art keywords
joint
clamping
lever
link
standby position
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.)
Expired - Lifetime
Application number
EP98106229A
Other languages
German (de)
English (en)
Other versions
EP0894573A3 (fr
EP0894573A2 (fr
Inventor
Karsten Becker
Uwe Borgolte
Josef Kordtomeikel
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.)
Benteler Deustchland GmbH
Original Assignee
Benteler Deustchland 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
Application filed by Benteler Deustchland GmbH filed Critical Benteler Deustchland GmbH
Publication of EP0894573A2 publication Critical patent/EP0894573A2/fr
Publication of EP0894573A3 publication Critical patent/EP0894573A3/fr
Application granted granted Critical
Publication of EP0894573B1 publication Critical patent/EP0894573B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/12—Arrangements for positively actuating jaws using toggle links
    • B25B5/122—Arrangements for positively actuating jaws using toggle links with fluid drive

Definitions

  • Component clamps are used in a wide variety of technical areas current fixation of workpieces used. You need to be quick and work reliably and maintenance-free multiples over long periods of use Ensure load changes.
  • DE 35 28 337 C2 counts a component clamp to the prior art, in which a tie rod is part of a acted upon by a pressure fluid such as air or hydraulic fluid and forms axially displaceable piston in a cylinder. That turned away from the piston
  • the end of the tension rod is connected with a bolt, the two Carrying pairs of roles.
  • the rollers of the outer pair of rollers run in a straight line Slits that extend parallel to the longitudinal axis of the tension rod.
  • the Rollers of the inner pair of rollers circulate in arcuate slots an axis swiveling clamping arm.
  • the guide slot can also be curved in an arc.
  • DE 31 30 942 A1 discloses a component tensioner based on the toggle principle. At the free end of a piston with a pressure medium connected piston rod is articulated a resiliently designed tab, which is also connected to a rigid toggle lever that is at 90 ° Dislocation is coupled with a tension arm. The tab is designed that the distance between the coupling joints with the piston rod and the lever is changeable.
  • the resilient tab should prevent infinitely large clamping forces become. With this, however, only the clamping force can be limited, but not Self-locking can be achieved. In addition, the fatigue strength and Durability of the tab can be problematic. Their production is also complex. In addition, the force limit is from the spring constant as well depends on the travel.
  • the recess forms in connection with the wheel and the Compression spring a locking means that the moving parts crankshaft, drive element, Lock the rod and lever arm in the clamped position. Due to the elastic locking of this special component assignment but no precisely definable dead center position of the clamping member with a perfect one Self-locking achievable.
  • This component clamp has a larger number of individual parts Commitment.
  • An additional lever arm is also integrated. There is one additional articulation point required with the corresponding manufacturing effort.
  • this joint area forms a wear area, which one increased maintenance is required.
  • the wedge surface forms part of the known component clamp of the profile part pivotable about the axis.
  • an additional component is present, but another wear point in Shape of the axis.
  • the profile part is under the influence of a compression spring.
  • a compression spring Herewith is not only involves an increased effort, but also an additional one Storage of the compression spring.
  • Another negative in the known case is that Springs are subject to undesired wear.
  • US Pat. No. 4,921,233 discloses a component tensioner according to the preamble of independent claim 1, in which one with the tension arm connected role on a positive guide, the one has concave area over the roll from several lengths. Each individual section of this concave area has a radius with a center of curvature between the hinge axis of the tension arm and the articulated axis connecting the tension arm to the roller Tab lies. In this way, e.g. self-locking in the event of a power failure be avoided. This endeavor is further supported by that the angle between a plane through the two hinge axes the tab runs, and the plane that the hinge axis of the tension arm and the hinge axis between the tension arm and the bracket cuts less than 90 ° should be.
  • the invention is based on the object to create a component tensioner that is simple to use the toggle principle allows a limitation of the increase in force and it still ensures that in the clamping position even if the Clamping energy the clamping position is guaranteed by self-locking.
  • the essence of the invention is the fact that the positive control for at least one roller arranged at the end of the tension rod with a to the first coupling joint between the lever and the lug in its dead center concave end portion is provided.
  • This concave end section begins in front of the side facing the standby position by the Dead center second coupling joint extending to the longitudinal axis the tension rod in the standby position vertically extending plane and ends on the side facing away from this standby position Plane at an end point at which the roller after passing over the dead center, to reach a self-locking state.
  • the concave End section is curved in a circular arc. It has a radius which is the length of the tab between the first and second coupling joints plus the radius of the roller.
  • the particular advantage of the invention is therefore to ensure the force limitation easily through the concave end portion with a very specific radius. Only with this radius is a constant force over the course of the piston travel possible. This will make a flawless Guaranteed self-locking after passing dead center.
  • the Component clamp also has a very compact design, because of the inventive Path translation between the lever and the tab only one small stroke of the tension rod is required.
  • the invention also allows the pivoting angle of the tension arm between set up the standby position and the clamping position as desired can. Only by using stroke-limiting pieces or by replacing the tension rod opening angles of in particular 45 °, 60 °, 90 ° and 115 ° up to a maximum opening angle of 135 ° can be provided. Furthermore, the component clamp can easily an integrated position query can be assigned.
  • the housing for mounting the tension arm, lever, bracket and tension rod is also designed so that a cooperating with the tension arm Abutment for fixing the position of the workpieces to be machined to the housing can be releasably assigned.
  • a particularly expedient embodiment of the invention consists in the Features of claim 2. Thereafter, the concave end portion extends of forced guidance over a length that takes you through the plane first coupling joint between the lever and the tab across dead center Swivel angle of the bracket from 6 ° to 10 °, but preferably 8 °, equivalent. This means that the tab is self-locking at 4 ° above the level guaranteed.
  • the positive guidance, the lever, the tab and the roller in one with the guide for the tension rod connectable two-part housing arranged. That way these parts are well protected against external influences even in rough operation.
  • the two-piece nature of the housing allows for easy manufacture as well easy assembly.
  • the tour is guided in particular by a Cylinder formed when according to a preferred embodiment Tension rod as a compressed air or also with a Piston rod connected to hydraulically actuated pistons is.
  • the necessary deflection of the tension rod when the roller comes into contact with the concave end section is through the seals on the cylinder for the tension rod.
  • the end sections carrying the articulated arms is of polygonal design.
  • the pivot shaft can be designed, in particular, as a square.
  • the Articulated arms are then with corresponding recesses and / or clamping pieces provided, through which the articulated arms perfectly on the Swivel shaft can be set.
  • the pivot shaft and the lever are preferably a component that is manufactured by turning and milling operations can be.
  • the component clamp 1 in FIGS. 1 and 2 is a component clamp operated with compressed air designated.
  • the component clamp 1 comprises a pressurized air Cylinder 2 for guiding a piston, not shown in detail Piston rod, a two-part housing 3 connected to the cylinder 2 with an integrated toggle lever system, not shown in more detail to transfer the force exerted by the compressed air on the piston a pivotable clamping arm 4.
  • the clamping arm 4 has a U-shaped configuration two articulated arms 5, which on clamping pieces 6 at one of the the housing 3 leads out four-sided pivot shaft 7 are releasably attached.
  • the longitudinal axis 8 of the clamping arm 4 runs perpendicular to Longitudinal axis 9 of the cylinder 2.
  • the lever 11 is over a first coupling joint 12 connected to a rigid bracket 13, which in turn again via a second coupling joint 14 with one end 15 one Tension rod 16 is connected (Figure 3).
  • the second coupling joint 14 supports on a roller 17, which on a positive guide 18 in the housing 3 rolls.
  • a recess 19 in the halves 20, 21 of the housing 3 is on adjusted the size of the pivoting movements of the lever 11 and the tab 13.
  • the length L of the straight length section 22 corresponds to that Size of the pivot angle ⁇ of the tension arm 4 between the standby position BP and the clamping position ST. It runs in a straight line parallel to Longitudinal axis 9 of the cylinder 2.
  • the end section 23 is to the first coupling joint 12 between the lever 11 and the tab 13 in its dead center (Clamping position ST of 4) curved concavely.
  • FIG. 11 also shows that the length L1 of the tab 13 between the first coupling joint 12 and the second coupling joint 14 larger than the distance A between the first coupling joint 12 and the coaxial to Longitudinal axis 9 of the cylinder 2 extending longitudinal axis 27 of the tension rod 18 is dimensioned.
  • FIGS. 3 and 7 show the standby position BP of the tension arm 4.
  • the opening angle ⁇ is 135 °.
  • the component clamp 1 is complete open.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Claims (5)

  1. Dispositif de serrage d'une pièce qui comporte une tige de serrage (16) pouvant être déplacée par l'énergie pneumatique, hydraulique ou électrique, un bras de serrage (4) pouvant basculer depuis sa position de serrage (ST) jusque dans une position d'attente de fonctionnement (BP) et vice-versa, un levier rigide (11) solidarisé en rotation avec le bras de serrage (4) par l'intermédiaire d'un arbre basculant (7) et un maillon rigide (13) accouplé de façon mobile en rotation aussi bien au levier (11) qu'à l'extrémité (15) de la tige de serrage (16), dont la longueur (L1) entre une première articulation d'accouplement (12) et une seconde articulation d'accouplement (14) est dimensionnée de façon à être supérieure à la distance (A) entre la première articulation d'accouplement (12) du maillon (13) au levier (11) et l'axe longitudinal (27) de la tige de serrage (16) dans la position d'attente de fonctionnement (BP), la seconde articulation d'accouplement (14) entre le maillon (13) et l'extrémité (15) de la tige de serrage (16) s'appuie au moins sur un galet de roulement (17), qui roule sur un guidage forcé (18), qui possède la section longitudinale (L) correspondant à l'angle de basculement (a) du bras de serrage (4) entre la position d'attente de fonctionnement (BP) et la position de serrage, qui s'étend linéairement parallèlement à l'axe longitudinal (27) de la tige de serrage (16) dans le position d'attente de fonctionnement, et qui est muni d'une section d'extrémité (23) concave dans son point mort par rapport à la première articulation d'accouplement (12) entre le levier (11) et le maillon (13), qui commence avant le côté tourné vers la position d'attente de fonctionnement du plan (E-E) s'étendant perpendiculairement à l'axe longitudinal (27) de la tige de serrage (16) dans la position d'attente de fonctionnement (BP) par la première articulation d'accouplement (12) se trouvant au point mort, caractérisé en ce que la section d'extrémité (23) aboutit en un point d'extrémité (25) sur le côté détourné de cette position d'attente de fonctionnement (BP) de ce plan (E-E), sur lequel parvient le galet de roulement (17) après avoir franchi le point mort pour atteindre un état autobloquant, tandis que la section d'extrémité concave (23) présente un rayon (R) qui correspond à la longueur (L1) du maillon (13) entre la première articulation d'accouplement (12) et la seconde articulation d'accouplement (14) en plus du rayon (r) du galet de roulement (17).
  2. Dispositif de serrage de pièce selon la revendication 1, dans lequel la section d'extrémité concave (23) du guidage forcé (18) s'étend sur une longueur d'arc (L3) qui correspond à un angle de basculement (2β) dépassant le plan (E-E) du maillon (13) de 6° à 10°, de préférence de 8°.
  3. Dispositif de serrage de pièce selon la revendication 1 ou 2, dans lequel le guidage forcé (18), le levier (11), le maillon (13) et le galet de roulement (17) sont agencés dans un logement (3) en deux parties qui peut être raccordé au guidage (2) pour la tige de serrage (16).
  4. Dispositif de serrage de pièce selon l'une des revendications 1 à 3, dans lequel le bras de serrage (4) enserre latéralement le logement (3) avec deux bras articulés (5) et est solidarisé en rotation, par l'intermédiaire des deux bras articulés (5), avec les extrémités sortant du logement (3) de l'arbre basculant (7) formé d'un seul tenant avec le levier (11).
  5. Dispositif de serrage de pièce selon la revendication 4, dans lequel l'arbre basculant (7) est de configuration polygonale dans les sections d'extrémité portant les bras articulés (5).
EP98106229A 1997-07-29 1998-04-06 Dispositif de serrage d'une pièce Expired - Lifetime EP0894573B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19732600A DE19732600C2 (de) 1997-07-29 1997-07-29 Bauteilspanner
DE19732600 1997-07-29

Publications (3)

Publication Number Publication Date
EP0894573A2 EP0894573A2 (fr) 1999-02-03
EP0894573A3 EP0894573A3 (fr) 1999-04-28
EP0894573B1 true EP0894573B1 (fr) 2003-04-02

Family

ID=7837232

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98106229A Expired - Lifetime EP0894573B1 (fr) 1997-07-29 1998-04-06 Dispositif de serrage d'une pièce

Country Status (4)

Country Link
US (1) US6206353B1 (fr)
EP (1) EP0894573B1 (fr)
BR (1) BR9803715A (fr)
DE (2) DE19732600C2 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6199846B1 (en) * 1998-04-28 2001-03-13 Isi Norgren, Inc. Electric power operated clamp with spring lock
DE29901363U1 (de) * 1999-01-27 1999-05-06 Festo AG & Co, 73734 Esslingen Kniehebel-Spannvorrichtung
DE10102327C1 (de) * 2001-01-19 2002-07-25 Sta Co Mettallerzeugnisse Gmbh Schwenkvorrichtung
ITMI20020683A1 (it) * 2002-04-02 2003-10-02 Luciano Migliori Dispositivo di pinzatura per saldature laser
US7815176B2 (en) 2003-09-11 2010-10-19 Phd, Inc. Lock mechanism for pin clamp assembly
DE102004007346B3 (de) * 2003-11-04 2005-04-21 Tünkers Maschinenbau Gmbh Kniehebelspannvorrichtung - auch Spannwerkzeug wie Punktschweißvorrichtung mit Kniehebelgelenkanordnung, oder Clinchwerkzeug mit Kniehebelgelenkanordnung oder dergleichen -, zur Verwendung im Karosseriebau der Kfz-Industrie
US7516948B2 (en) * 2004-04-02 2009-04-14 Phd, Inc. Pin clamp accessories
US7182326B2 (en) * 2004-04-02 2007-02-27 Phd, Inc. Pin clamp
US7448607B2 (en) * 2004-12-15 2008-11-11 Phd, Inc. Pin clamp assembly
US20070267795A1 (en) * 2006-02-06 2007-11-22 Parag Patwardhan Pin clamp transfer assembly and method of transferring a workpiece
MX2009014026A (es) 2007-06-19 2010-03-10 Phd Inc Ensamble de abrazadera de perno.
ES2716478T3 (es) * 2008-06-18 2019-06-12 Phd Inc Pinza de pasador de retirada
EP2177320A1 (fr) * 2008-10-15 2010-04-21 UNIVER S.p.A. Dispositif de commande à genouillère de type irréversible
JP5353629B2 (ja) 2008-11-14 2013-11-27 信越化学工業株式会社 熱硬化性樹脂組成物
CN102407422A (zh) * 2011-12-05 2012-04-11 安徽省芜湖仪器仪表研究所 一种气动夹紧自锁装置及其夹紧方法
ITUB20153120A1 (it) * 2015-08-13 2017-02-13 Pneumax S P A Unita' di attuazione del tipo a leva articolata a efficienza ottimizzata
CN110181439B (zh) * 2019-06-25 2021-01-26 京东方科技集团股份有限公司 用于夹紧卡匣的夹紧器件和卡匣组件
CN110561472B (zh) * 2019-10-23 2022-09-20 烟台宇信科技有限公司 一种工件搬运抓手用双自锁定位夹紧机构
CN114012629A (zh) * 2021-11-26 2022-02-08 昌河飞机工业（集团）有限责任公司 一种自动夹紧装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2296494A1 (fr) * 1974-12-31 1976-07-30 Carel Fouche Languepin Dispositif de serrage pneumatique
DE3022376C2 (de) * 1980-06-14 1985-08-01 De-Sta-Co Metallerzeugnisse Gmbh, 6000 Frankfurt Kniehebelspannvorrichtung zum Festspannen von Werkstücken
DE3130942A1 (de) * 1981-08-05 1983-04-28 Tünkers Maschinenbau GmbH, 4030 Ratingen Druckmittelbetaetigbare kniehebelspannvorrichtung mit elastischem federgelenk und loesbar befestigtem spannarm
FR2555926B1 (fr) * 1983-12-02 1986-09-12 Franche Comte Alsace Etudes Te Dispositif de serrage pneumatique a genouillere
DE3528337A1 (de) * 1985-08-07 1987-02-19 Eugen Rapp Spannvorrichtung
ES2002520A6 (es) * 1985-09-24 1988-08-16 Fabrice Goussu Dispositivo de embridado de cabezas multiples con mado unico a distancia
FR2618713B3 (fr) * 1987-07-29 1990-03-30 Cecchi Gerard Dispositif de bridage
FR2630953B1 (fr) * 1988-05-06 1991-04-05 Genus Int Dispositif de bridage pour plaques ou profiles l'un contre l'autre
FR2639569B1 (fr) * 1988-11-25 1991-01-18 Polymatic Sa Tete de bridage a rattrapage de jeux
FR2754484B1 (fr) * 1996-10-15 1999-04-16 Robotic Perfectionnement pour dispositif de serrage du type comprenant un levier actionne par un piston
DE29713944U1 (de) * 1997-08-05 1997-10-02 Tünkers Maschinenbau GmbH, 40880 Ratingen Druckmittelbetätigbare Kniehebelspannvorrichtung

Also Published As

Publication number Publication date
EP0894573A3 (fr) 1999-04-28
EP0894573A2 (fr) 1999-02-03
DE19732600A1 (de) 1999-02-25
BR9803715A (pt) 1999-11-23
DE59807698D1 (de) 2003-05-08
US6206353B1 (en) 2001-03-27
DE19732600C2 (de) 2000-03-30

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