EP0173169A1 - Dispositif de blocage pivotant - Google Patents

Dispositif de blocage pivotant Download PDF

Info

Publication number
EP0173169A1
EP0173169A1 EP85110201A EP85110201A EP0173169A1 EP 0173169 A1 EP0173169 A1 EP 0173169A1 EP 85110201 A EP85110201 A EP 85110201A EP 85110201 A EP85110201 A EP 85110201A EP 0173169 A1 EP0173169 A1 EP 0173169A1
Authority
EP
European Patent Office
Prior art keywords
guide
piston
clamping
tensioning
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.)
Withdrawn
Application number
EP85110201A
Other languages
German (de)
English (en)
Inventor
Dirk Cornelis Bolderman
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.)
Enerpac Tool Group Corp
Original Assignee
Applied Power Inc
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 Applied Power Inc filed Critical Applied Power Inc
Publication of EP0173169A1 publication Critical patent/EP0173169A1/fr
Withdrawn legal-status Critical Current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
    • B25B5/061—Arrangements for positively actuating jaws with fluid drive
    • B25B5/062—Arrangements for positively actuating jaws with fluid drive with clamping means pivoting around an axis parallel to the pressing direction

Definitions

  • the invention relates to a swing clamp for fixing an object to a support and in particular for clamping a workpiece or a tool on a processing machine with a clamping cylinder, in which a clamping piston which can be acted upon by a pressure medium is axially displaceably guided on a non-rotatable guide rod and with which a clamping piston rod is firmly connected, which carries a tension arm at its free end protruding from the tensioning cylinder and, in the course of the displacement of the tensioning piston along the guide rod penetrating it into a cavity in the tensioning piston rod, besides an axial adjustment together with the tensioning piston and the tensioning arm also one by one Helix on the guide rod experiences certain rotational movement un its axis, which allows the tension arm to pivot about this axis.
  • a swivel clamp of this type is known from DE-PS 29 09 464.
  • the guide rod is designed in the form of a swivel rod firmly connected to the bottom of the clamping cylinder, which has a square cross-section and is twisted at its free upper end to form a helical screw .
  • the swivel rod comes into engagement with a guide washer, which rests against an inner shoulder in the hollow tensioning piston rod and, when it slides along the swivel rod in the course of the tensioning movement of the tensioning piston, tensioning piston rod and tensioning arm, initially performs a combined pivoting and axial movement which can then follow a more or less extensive pure axial movement.
  • the different clamping movement phases are not separated from each other and run on the clamping piston with a uniform drive thrust.
  • the invention is therefore based on the object of designing a swing clamp of the type mentioned in such a way that the tensioning movement can be controlled separately in its individual phases, in particular care being taken to ensure that the tensioning piston rod initially has no rotary movement and thus no pivoting movement of the tensioning arm Part of its length can be extended so that the pivoting movement of the tensioning arm can then be triggered via a rotary movement of the tensioning piston rod without its further extension, and that finally, when the tensioning arm is pivoted out, a return stroke of the tensioning piston rod can be carried out as the actual tensioning movement in order to fix the respective object.
  • the guide rod has a guide groove with a first axial section and a second axial section and a helix connecting these, on which at least one guide ball held in the tensioning piston or in the tensioning piston rod rolls, and that the guide rod in turn under Drive can be adjusted in the axial direction relative to the tensioning piston and to the tensioning piston rod in the tensioning cylinder by means of a guide piston which can be pressurized independently of the tensioning piston.
  • the tensioning piston rod can rotate about its axis and can thereby impart a pivoting movement to the tensioning arm without the tensioning piston rod extending further.
  • the axial movements of the tensioning piston, tensioning piston rod and tensioning arm take place independently of the mentioned rotating or swiveling movement. Axial and rotary or swivel movements are therefore completely decoupled from one another and can be controlled individually.
  • the swivel clamp designed according to the invention can be described as a device for clamping an object and in particular a workpiece or a tool, which has a double-acting clamping cylinder arrangement with a clamping piston, a clamping piston rod connected to it and a clamping arm seated at its free end.
  • the tensioning piston rod can be moved in and out of a housing which also accommodates the tensioning cylinder with the tensioning piston and can be rotated about its axis under the control of a guide device with at least one guide ball running in a helical groove along with the pivoting tension arm.
  • the guide device has a guide rod which passes axially through the tensioning piston and can be inserted more or less far into a cavity in the tensioning piston rod.
  • the guide rod is rotatably guided in a guide ring that closes off the tensioning cylinder and carries a guide piston on the head side that works in a guide cylinder that connects to the guide ring.
  • a locking device Arranged around the tensioning piston rod on the side facing away from the guide device is a locking device which can act on the tensioning piston rod with locking elements in the form of wedges or cones, contains a locking spring and can be released by means of a release piston which surrounds the tensioning piston rod in the form of an annular piston.
  • the guide rod furthermore has a guide groove which has an axial section on each side of the tensioning piston and on the side of the guide piston and in between, both connecting a screw helix.
  • the tensioning piston rod When the tensioning piston rod is retracted, the tensioning piston and the guide piston rest on the guide ring.
  • the tensioning piston rod can be extended without rotation when the tensioning piston is actuated under guidance on the guide portion on the axial piston side of the guide groove when the release piston is actuated strikes.
  • the guide piston can be moved away from the guide ring by a corresponding pressure medium supply, the tensioning piston rod being rotated about its axis by the interaction between the guide ball and the helical piece of the guide groove and thus allowing the tensioning arm to pivot.
  • the tensioning piston rod when the release piston is acted upon, the tensioning piston rod can be retracted under guidance on the tensioning piston-side axial section of the guide groove by a portion of its extension movement and can thereby be tensioned against the respective object.
  • the swing clamp shown in the drawing is suitable for fixing an object on a carrier and in particular for clamping a workpiece or a tool in a processing machine, which can be set up for a fully or semi-automatic workflow.
  • the basic components of the swing clamp shown are a double-acting tensioning cylinder arrangement 1, a tensioning piston 3 with an attached tensioning piston rod 2 and a tensioning arm 4 connected to the tensioning piston rod 2.
  • the tensioning piston rod 2 can be moved in and out of a housing 6 which also contains the tensioning piston 3 and the tensioning cylinder 5, and with the aid of a guide device which has at least one guide ball 8 running in a guide groove with a helical helix 7 together with the pivoting tension arm 4 its axis 9 rotatable.
  • the guide device has a guide rod 10 which passes axially through the tensioning piston 3 and can be moved in and out of the tensioning piston rod 2.
  • the guide rod 10 is rotatably guided in a guide ring 11 and carries a guide piston 12 on the head side, which works in a guide cylinder 13 which connects to the guide ring 11 - to the right in the drawing. In this way, the guide ring 11 closes off the tensioning cylinder 5 for the tensioning piston 3.
  • a locking device 14 Arranged on the side opposite the guide device is a locking device 14, which can act on the tensioning piston rod 2 with locking elements 15 in the form of cones divided in the exemplary embodiment, has a locking spring 16 and can be released by means of a release piston 17 which the tensioning piston rod 2 in a locking cylinder 24 surrounds as an annular piston.
  • the guide rod 10 contains a guide groove which has an axial section 18 and 19, respectively, on the tensioning piston side and on the guide piston side and in between, connecting the two, the screw helix 7.
  • the whole arrangement is such that when the tensioning piston rod 2 is retracted, the tensioning piston 3 and the guide piston 12 rest on the guide ring 11.
  • the tensioning piston rod 2 can be extended by actuation of the tensioning piston 3 by means of a corresponding pressure medium under guidance on the axial portion 18 of the guide groove on the guide piston side with the aid of the guide ball 8 without a rotary movement in a way which is indicated in FIG. 1 by a double arrow 20.
  • the release piston is pressurized and the locking elements 15 pushes back against the locking spring 16 in their release position. If the release piston 17 is not acted upon by pressure medium, the locking spring 16 presses the locking elements 15 into their locking position, in which they hold the tensioning piston rod 2 securely.
  • the guide piston 12 can be moved away from the guide ring 11 by a corresponding application of pressure medium, the tensioning piston rod 2 being rotated about its axis by interaction between the guide ball 8 and the helical helix 7 of the guide groove and imparting a corresponding pivoting movement to the tensioning arm 4. Subsequently, the tensioning piston rod 2 can be retracted by a portion of its stroke, the length of which is indicated in FIG. 1 by a double arrow 21, without a rotary movement under the guidance of the guide ball 8 on the tensioning piston-side axial section 19 of the guide groove when the release piston 17 is pressurized. This movement section is available for the actual clamping of the respective object.
  • the tensioning piston 3 In the starting position, the tensioning piston 3 is completely retracted and the guide piston 12 is extended against the guide ring 11 as far as it will go.
  • the guide rod 10 is connected to the guide piston 12 and is therefore also in the extended position.
  • Two guide balls 8 are installed in the tensioning piston 3, which roll in the guide groove on the guide rod 10 and guide the tensioning piston 3.
  • the guide rod 10 is secured against rotation by two further balls 22 installed in the guide ring 11, which roll on the axial section 18 of the guide groove of the guide rod 10.
  • the guide ring 11 is in turn secured against rotation by a pin 23, which sits halfway along its length in the housing 6 and in the guide ring 11.
  • the release piston 17, the tensioning piston 3 and the guide piston 12 are acted upon in a suitable sequence with pressure oil.
  • the release piston 17 releases the locking elements 15 from the tensioning piston rod 2.
  • the tensioning piston 3, guided through the axial section 18 of the guide groove of the guide rod 10 extends the tensioning piston rod 2 with the tensioning arm 4 without rotating movement to the full stroke.
  • the guide piston 12 is then acted upon by pressure oil; he goes characterized by the guide ring 11 away and assumes the guide rod 10 so that the guide groove passes with its screw spiral piece 7 in engagement with the guide balls 8 in the clamping piston 3 and this rotated 90 0 without axial movement.
  • the clamping piston rod is 2, and the clamp arm 4 at its free end undergoes a pivoting through 90 0 about the axis 9 of the clamping piston rod 2 as a pivot axis to the position shown in Fig. 1 pre-clamping position.
  • the tensioning piston 3 is pressurized with pressure oil on its side facing the tensioning arm 4, and it moves in until the tensioning arm 4 lies against the object to be clamped and clamps it.
  • the guide rod 10 remains in its position and secures the tensioning piston 3 guided along the axial section 19 of the guide groove against rotation.
  • the tensioning piston rod 2 can be mechanically secured against axial adjustment in any position by means of the locking device 14. This fuse is automatically activated in the event of a pressure failure in the hydraulic system. As soon as the oil pressure in the unlocking cylinder 24 for the release piston 17 drops, the locking spring 16 relaxes and presses the conically shaped locking elements 15 between the tensioning piston rod 2 and a cone ring 25; at the same time the release piston 17 is pushed back - to the left in the drawing. The frictional forces between the locking elements 15 and the tensioning piston rod 2 result in a reliable mechanical securing, which prevents any movement of the tensioning piston rod 2.
  • release piston 17 If the release piston 17 is then again pressurized with oil pressure, it presses the locking elements 15 against the locking spring 16 out of the conical ring 25 and thus releases the mechanical securing on the tensioning piston rod 2.
  • the locking spring 16 is compressed and thus pre-tensioned so that their security function is guaranteed.
  • Plugs 26 made of plastic installed in the tensioning piston rod 2 define driving positions which can be scanned in the housing 6 by means of proximity switches 27.
  • the feedback of the position reached in each case takes place as soon as a plug 26 of the tensioning piston rod 2 comes to the level of a proximity switch 27.
  • the desired number of driving positions can be monitored, whereby an electronic stroke feedback can be provided, the signals of which can then be included, for example, in an electronic control for a processing machine equipped with the swing clamp.
  • the swing clamp shown is characterized by a high level of operational reliability and flexibility, which is due to the fact that the various movements can be controlled independently and the second is to be further increased by the automatically effective shutdown in the event of a pressure failure and the possibility of electronic stroke monitoring above all, the dangers associated with unintentional loosening of the clamped object can be safely eliminated.
  • a swing clamp according to the invention in its preferred embodiment can be described as a device that can be used to fix, in particular, a workpiece or a tool in a fully or semiautomatically operated processing machine, with one of one being used to achieve independently executable axial and pivoting movements
  • Tensioning pistons that can be actuated via a tensioning piston rod in the course of a guide groove on a non-rotatably held guide rod are provided in sequence with a first axial section, a helical coil piece and a second axial section, which interact in succession with at least one guide ball in the tensioning piston or in the tensioning piston rod and thereby first for the tensioning process a purely axial extension stroke of the tensioning piston rod and tensioning arm without rotary movement, then a pure rotation of the tensioning piston rod while pivoting the tensioning arm about the axis of the tensioning piston rod and sc finally trigger a purely axial clamping stroke in the retracting direction of the tensioning piston rod, a locking device to be released before the start of the

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
EP85110201A 1984-08-22 1985-08-14 Dispositif de blocage pivotant Withdrawn EP0173169A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3430930 1984-08-22
DE19843430930 DE3430930A1 (de) 1984-08-22 1984-08-22 Schwenkspanner

Publications (1)

Publication Number Publication Date
EP0173169A1 true EP0173169A1 (fr) 1986-03-05

Family

ID=6243664

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85110201A Withdrawn EP0173169A1 (fr) 1984-08-22 1985-08-14 Dispositif de blocage pivotant

Country Status (2)

Country Link
EP (1) EP0173169A1 (fr)
DE (1) DE3430930A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0179325A2 (fr) * 1984-10-24 1986-04-30 Applied Power Inc. Dispositif de serrage avec bride oscillante
DE4122181C1 (fr) * 1991-07-04 1993-01-07 Ott Maschinentechnik Gmbh, 8960 Kempten, De
FR2827803A1 (fr) * 2001-07-30 2003-01-31 Applic Des Nouvelles Technolog Bride de serrage
WO2019239795A1 (fr) * 2018-06-12 2019-12-19 株式会社コスメック Vérin
JP2019215074A (ja) * 2018-06-12 2019-12-19 株式会社コスメック シリンダ
CN117823488A (zh) * 2023-11-17 2024-04-05 深圳市恒拓高工业技术股份有限公司 回转夹紧气缸及夹持装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8714390U1 (de) * 1987-10-29 1989-03-02 De-Sta-Co Metallerzeugnisse Gmbh, 6000 Frankfurt Spannvorrichtung
DE8908288U1 (de) * 1989-07-07 1989-09-21 Tünkers, Josef Gerhard, 4030 Ratingen Kniehebelspannvorrichtung für den Karosseriebau
DE9104053U1 (de) * 1991-04-04 1991-06-27 De-Sta-Co Metallerzeugnisse Gmbh, 6000 Frankfurt Schwenkspannvorrichtung
DE4139317A1 (de) * 1991-11-29 1993-06-03 Ott Maschinentechnik Hydraulisch betaetigbarer schwenkspanner
CN104148961B (zh) * 2014-09-10 2016-09-21 上海中船三井造船柴油机有限公司 一种可消除装夹间隙的工件支撑装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2909464A1 (de) * 1979-03-10 1980-09-11 Maier Andreas Fa Schwenkspanner, insbesondere zum spannen eines werkstueckes auf einem maschinentisch einer werkzeugmaschine
DE3039818A1 (de) * 1980-10-22 1982-05-27 Maschinenfabrik Hilma Gmbh, 5912 Hilchenbach Schwenkspanner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4185539A (en) * 1977-03-07 1980-01-29 Andrew Stratienko Locking device for hydraulic actuator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2909464A1 (de) * 1979-03-10 1980-09-11 Maier Andreas Fa Schwenkspanner, insbesondere zum spannen eines werkstueckes auf einem maschinentisch einer werkzeugmaschine
DE3039818A1 (de) * 1980-10-22 1982-05-27 Maschinenfabrik Hilma Gmbh, 5912 Hilchenbach Schwenkspanner

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0179325A2 (fr) * 1984-10-24 1986-04-30 Applied Power Inc. Dispositif de serrage avec bride oscillante
EP0179325A3 (fr) * 1984-10-24 1987-10-14 Applied Power Inc. Dispositif de serrage avec bride oscillante
DE4122181C1 (fr) * 1991-07-04 1993-01-07 Ott Maschinentechnik Gmbh, 8960 Kempten, De
FR2827803A1 (fr) * 2001-07-30 2003-01-31 Applic Des Nouvelles Technolog Bride de serrage
EP1281480A1 (fr) * 2001-07-30 2003-02-05 Application des Nouvelles Technologies du Bois - ANTB Bride de serrage
WO2019239795A1 (fr) * 2018-06-12 2019-12-19 株式会社コスメック Vérin
JP2019215074A (ja) * 2018-06-12 2019-12-19 株式会社コスメック シリンダ
US11255357B2 (en) 2018-06-12 2022-02-22 Kosmek Ltd. Cylinder
CN117823488A (zh) * 2023-11-17 2024-04-05 深圳市恒拓高工业技术股份有限公司 回转夹紧气缸及夹持装置

Also Published As

Publication number Publication date
DE3430930A1 (de) 1986-03-06

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Inventor name: BOLDERMAN, DIRK CORNELIS