EP0436883B1 - Dispositif de serrage - Google Patents

Dispositif de serrage Download PDF

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Publication number
EP0436883B1
EP0436883B1 EP90124548A EP90124548A EP0436883B1 EP 0436883 B1 EP0436883 B1 EP 0436883B1 EP 90124548 A EP90124548 A EP 90124548A EP 90124548 A EP90124548 A EP 90124548A EP 0436883 B1 EP0436883 B1 EP 0436883B1
Authority
EP
European Patent Office
Prior art keywords
circular arc
clamping
clamping arm
fork portions
clamping device
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
EP90124548A
Other languages
German (de)
English (en)
Other versions
EP0436883A1 (fr
Inventor
Michel Buchenau
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.)
DESTACO Europe GmbH
Original Assignee
DE STA CO Metallerzeugnisse 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 DE STA CO Metallerzeugnisse GmbH filed Critical DE STA CO Metallerzeugnisse GmbH
Priority to AT90124548T priority Critical patent/ATE102530T1/de
Publication of EP0436883A1 publication Critical patent/EP0436883A1/fr
Application granted granted Critical
Publication of EP0436883B1 publication Critical patent/EP0436883B1/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
    • B25B5/16—Details, e.g. jaws, jaw attachments
    • 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

  • the invention relates to a clamping device for clamping workpieces on a base according to the preamble of patent claim 1.
  • a tensioning device of this type is known from DE-U-78 06 055 and DE-A-36 02 738.
  • Clamping devices of this type are used, in particular, for clamping workpieces to be machined on work tables or specially designed workpiece frames, in particular in series production. With regard to their actuation and clamping function, these clamping devices fulfill the requirements to be placed on them for a perfect and permanent fixation of the workpiece on their base. This flawless function can, however, be adversely affected if machining operations are to be carried out on the workpiece in question, and it may well be the case that machining chips get into the adjustment mechanism of such clamping devices.
  • the invention has for its object to improve a tensioning device of the type mentioned in such a way that while maintaining the double-sided bearing of the pivot pin for the tensioning arm, without having to use elastic material for the cover element, a secure cover should be accessible.
  • the cover element is in principle a slide which simply follows the movements of the tension arm, which is brought about by the fact that it is in a suitable operative connection with the tension arm.
  • the circular arc shape of the cover element and on the other hand the feature that this circular arc-shaped slide has the pivot axis of the tensioning arm to the center, since this pivot axis is the only stationary location for the tensioning arm on the head piece of the tensioning device. Due to this design and assignment of the cover element to the clamping head, the elasticity of the material of the cover element is in no way claimed despite constant closing and opening processes.
  • cover element can also be secured in other ways with regard to its circular arc guide around the stationary axis of the tensioning arm (guide vanes angled on both sides and encompassing the axis with bearing eyes), training with regard to the cover element guide is preferred in such a way that on the inner flanks of the fork parts of the head piece are arranged guide grooves into which engage the edges of the circular arc piece, which is then practically moved only in the gap between the two fork parts in this embodiment.
  • the end of the cover element on the tensioning arm side is also provided with a drag flag, which is then simply pulled along by the tensioning arm or its driver extension which goes into the tensioning position. It is also possible, as will be explained in more detail, to keep the cover element pressed against the tensioning arm by a spring in a suitable arrangement.
  • the gap between the fork parts on the side remote from the tension arm is located up to the end located there in the tensioned position of the circular arc piece formed closed.
  • This closure wall can be suitably adapted to the inside of the circular arc contour of the cover element.
  • an advantageous further development also consists in the gap between the fork parts on the clamping arm side being closed up to the joint extension of the clamping arm and the region of the joint extension adjacent to the end of this closure wall in the form an arc is formed, which arc also has the pivot axis of the clamping arm to the center. As will be explained in more detail, this also results in complete coverage of the interior between the fork parts of the headpiece on the tensioning arm side of the headpiece.
  • the circular arc piece also consists of at least two relative to one another movable, operatively connected parts is formed and these are guided in guide grooves of the fork parts.
  • the tensioning device consists of a fork-like head piece 1, between the fork parts 2 of which the tensioning arm 4, which can be pivoted about an axis 3, and the articulated and actuating members 5, 6 (intermediate member 5 and piston rod 6) which pivot it. are stored, the space between the fork parts 2 in the region of the upper head piece 1 being covered with a cover element 7.
  • the cover element 7 is designed in the form of a circular arc piece 8, the center point M of which lies in the pivot axis 3 of the clamping arm. That around the center point M pivotable circular arc piece 8 is guided in this embodiment in the gap 9 (Fig. 3) between the fork parts 2 of the head piece 1.
  • the length of the circular arc piece 8 is dimensioned such that at least the two joints 10, 11 of the joint member 11 are covered.
  • the circular arc piece with its tension arm-side end 12 can be brought into operative connection with the part 4 ′ of the tension arm 4 near the axis or can be operatively connected to it.
  • FIG. 1 shows the embodiment in which the cover element 7 can be brought into operative connection with the tensioning arm, ie the circular arc piece 8 is not directly coupled to the tensioning arm 4, but rather a driver extension on the part 4 'of the tensioning arm 4 near the axis 14 provided and the circular arc piece 8 has at both ends 12, 12 'drag flags 15 for the driver extension 14 movable between the flags 15.
  • the drag flag 15 remote from the tension arm is not even absolutely necessary, since the cover element 7 is pressed back anyway when the tension arm 4 is pivoted back into the open position according to FIG. 2. However, the drag flag 15 on the side near the tensioning arm is necessary, since the circular arc piece 8 must be pulled back into the position according to FIG. 1 by pivoting the tensioning arm 4 into the tensioning position.
  • Fig. 4 illustrates at the same time the possibility of adapting the head piece 1 to the circular arc shape of the cover element, which is then no longer moved in the gap 9, but via the circular arc-shaped end faces of the fork parts 2, which then form the guides 13.
  • the circular-arc-shaped adaptation of the head piece 1 or the fork parts 2 can only be limited to gap-side edges which form the guides 13 and which merge into guide grooves 13 'in the area 22.
  • the circular arc guidance of the circular arc piece is ensured by guide grooves 13 'arranged on the inner flanks 2' of the fork parts 2 of the head piece 1, into which the edges of the circular arc piece 8 engage. Since the circular arc piece 8 cannot be kept as long as desired in order to avoid a collision with the piston rod 6, but on the other hand it should be ensured that the interior in the head piece 1 is covered as completely as possible, the gap 9 between the fork parts 2 on the side 16 remote from the tension arm closed to the end 12 'of the Kriesbogen Zealand 8 located there in the clamping position.
  • the shape of the closure wall ensuring this is adapted in the upper region of the circular arc shape of the circular arc piece 8 and extends directly next to the guide grooves 13 '.
  • the gap 9 between the fork parts 2 on the tension arm side 16' is advantageously closed up to the articular extension 17 of the tension arm 4 and the region of the joint extension 17 adjacent to the end 18 'of this closure wall 18 is designed in the form of a circular arc 19 which likewise has the center M of the axis 3 to the center. This circular arc 19 thus sweeps past the upper end 18 'of the closure wall when the tensioning arm 4 moves, with the least possible play, of course, being provided.
  • the circular arc piece 8 is formed from at least two parts 8 'which are displaceable relative to one another and are operatively connected to one another and which are formed in guide grooves 13' of the fork parts 2 are led.
  • a further embodiment of the cover element 8 is shown in perspective in FIG. 7, which makes groove guides on the fork parts 2 unnecessary.
  • the cover element 8 designed as shown sits with its openings 23 with on the pivot axis 3. If the head piece 1 is designed in the sense of FIG. 5, the actual gap covering surface F, as shown in dashed lines, can protrude beyond the lateral guide webs 24 and thus place on the circular fork parts or on the guides 13.
  • the openings 23 can be provided with corresponding recesses 25 and the tensioning arm with small side pins (not shown) which engage in these recesses 25 and which also adjust the entire cover element 8 accordingly.
  • a direct coupling of the tension arm-side end 8 '' to the tension arm 4 is possible if the cover element 8 is designed in a fork-like manner in the sense of FIG. 8 at the end remote from the tension arm, the fork pieces, as indicated by dashed lines in FIG. 2, and in this open position on the Reach in piston rod 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Helmets And Other Head Coverings (AREA)
  • Jigs For Machine Tools (AREA)

Claims (10)

  1. Dispositif de serrage composé d'une partie de tête (1) en forme de chape, entre les branches de chape (2) de laquelle sont montés le bras de serrage (4) pouvant pivoter autour d'un axe (3), ainsi que les organes d'articulation et d'actionnement (5, 6) permettant de faire pivoter le bras de serrage, l'espace entre les branches de chape (2) étant recouvert, dans la zone de la partie de tête supérieure (1), par un élément de recouvrement (7), qui recouvre au moins les deux articulations (10, 11) de l'organe d'articulation (5), et qui est en liaison fonctionnelle avec la partie (4') du bras de serrage (4), proche de l'axe, caractérisé en ce que l'élément de recouvrement (7) est réalisé en tant que pièce en forme d'arc de cercle (8), dont le centre (M) se situe sur l'axe de pivotement (3) du levier de serrage (4), et qui est guidée dans ou sur des guidages (13) en forme d'arc de cercle adapté, sur les branches de chape (2) de la partie de tête (1).
  2. Dispositif de serrage selon la revendication 1, caractérisé en ce que la pièce en forme d'arc de cercle (8) est disposée à l'intérieur de la fente (9) entre les branches de chape (2) de la partie de tête (1).
  3. Dispositif de serrage selon la revendication 1, caractérisé en ce que les branches de chape (2) de la partie de tête (1) présentent, dans la zone de guidage pour l'élément de recouvrement (7), tout au moins côté fente, une forme adaptée à la forme d'arc de cercle de l'élément de recouvrement (7), guidages en forme d'arc de cercle (13) des branches de chape (2) auxquels se raccordent des guidages en forme de rainures (13') en forme d'arc de cercle et ouverts vers les flancs intérieurs (2') des branches de chape (2).
  4. Dispositif de serrage selon l'une des revendications 1 à 3, caractérisé en ce que l'élément de recouvrement (7) est maintenu avec son extrémité (8'') côté bras de serrage, contre la partie (4') du bras de serrage (4), proche de l'axe, en étant soumis à la tension d'un ressort (21).
  5. Dispositif de serrage selon la revendication 2, caractérisé en ce que sur les flancs intérieurs (2') des branches de chape (2) de la partie de tête (1), sont disposées des rainures de guidage (13) dans lesquelles s'engagent les bords de la pièce en forme d'arc de cercle (8).
  6. Dispositif de serrage selon l'une des revendications 1 à 3, caractérisé en ce que sur la partie (4') du bras de serrage (4), proche de l'axe, est disposé un appendice d'entraînement (14), et en ce que la pièce en forme d'arc de cercle (8) est pourvue aux deux extrémités (12, 12') de talons d'entraînement (15) pour l'appendice d'entraînement (14) mobile entre les talons (15).
  7. Dispositif de serrage selon l'une des revendications 1 à 6, caractérisé en ce que la fente (9) entre les branches de chape (2), sur le côté (16) éloigné du bras de serrage, est réalisée de manière fermée, de l'extrémité inférieure jusqu'à l'extrémité (12') de la pièce en forme d'arc de cercle (8) s'y trouvant en position de serrage.
  8. Dispositif de serrage selon l'une des revendications 1 à 7, caractérisé en ce que la pièce en forme d'arc de cercle (8) est formée d'au moins deux parties (8') pouvant coulisser l'une par rapport à l'autre, liées de manière fonctionnelle, et guidées dans des rainures de guidage (13') des branches de chape (2).
  9. Dispositif de serrage selon l'une des revendications 1 à 8, caractérisé en ce que la fente (9) entre les branches de chape (2), est fermée sur le côté (16') du bras de serrage, jusqu'à l'embase d'articulation (17) du bras de serrage (4), et en ce que la zone de cette embase d'articulation, voisine de l'extrémité (18') de cette paroi de fermeture (18), présente une configuration en forme d'arc de cercle (19).
  10. Dispositif de serrage selon la revendication 1 ou 2, caractérisé en ce que l'élément de recouvrement (7) en forme d'arc de cercle est pourvu de nervures de guidage (24) montées sur l'axe (3) du bras de serrage (4).
EP90124548A 1990-01-09 1990-12-18 Dispositif de serrage Expired - Lifetime EP0436883B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90124548T ATE102530T1 (de) 1990-01-09 1990-12-18 Spannvorrichtung.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4000388 1990-01-09
DE4000388 1990-01-09
DE4025530 1990-08-11
DE4025530A DE4025530A1 (de) 1990-01-09 1990-08-11 Spannvorrichtung

Publications (2)

Publication Number Publication Date
EP0436883A1 EP0436883A1 (fr) 1991-07-17
EP0436883B1 true EP0436883B1 (fr) 1994-03-09

Family

ID=25888888

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90124548A Expired - Lifetime EP0436883B1 (fr) 1990-01-09 1990-12-18 Dispositif de serrage

Country Status (3)

Country Link
EP (1) EP0436883B1 (fr)
DE (2) DE4025530A1 (fr)
ES (1) ES2050926T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5064177A (en) * 1990-01-16 1991-11-12 Delaware Capital Formation Power clamp with enclosed track
DE9411291U1 (de) * 1994-07-13 1994-11-03 Sta Co Mettallerzeugnisse Gmbh Spannvorrichtung
DE9412722U1 (de) * 1994-08-06 1994-09-29 Sta Co Mettallerzeugnisse Gmbh Kniehebelspannvorrichtung
FR2730180B1 (fr) * 1995-02-02 1997-03-14 Robotic Sa Perfectionnement pour dispositif de serrage du type comprenant un levier actionne par un piston
FR2754484B1 (fr) * 1996-10-15 1999-04-16 Robotic Perfectionnement pour dispositif de serrage du type comprenant un levier actionne par un piston
DE202006000904U1 (de) * 2006-01-19 2006-05-11 Karin Schmid E. K. Schwenkspanner für Automatisierungszwecke
CN105081841A (zh) * 2015-07-31 2015-11-25 重庆山青机械制造有限公司 一种三四挡换挡拨叉加工定位夹具

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550115B1 (fr) * 1983-08-03 1986-06-27 Thombor Rojac Dispositif de serrage
FR2588494B3 (fr) * 1985-10-11 1988-01-15 Renault Automation Dispositif de bridage de pieces
DE3602738C1 (de) * 1986-01-30 1987-07-09 Sta Co Mettallerzeugnisse Gmbh Spannvorrichtung

Also Published As

Publication number Publication date
ES2050926T3 (es) 1994-06-01
EP0436883A1 (fr) 1991-07-17
DE4025530A1 (de) 1991-07-11
DE59004921D1 (de) 1994-04-14

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