EP0509265B1 - Adjustment of force for clamping device - Google Patents

Adjustment of force for clamping device Download PDF

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Publication number
EP0509265B1
EP0509265B1 EP92104834A EP92104834A EP0509265B1 EP 0509265 B1 EP0509265 B1 EP 0509265B1 EP 92104834 A EP92104834 A EP 92104834A EP 92104834 A EP92104834 A EP 92104834A EP 0509265 B1 EP0509265 B1 EP 0509265B1
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EP
European Patent Office
Prior art keywords
sleeve
housing
stop shoulder
belleville springs
tension
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
EP92104834A
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German (de)
French (fr)
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EP0509265A2 (en
EP0509265A3 (en
Inventor
Heinrich Dipl.-Ing. Berchtold
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Gressel AG
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Gressel AG
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Publication date
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Publication of EP0509265A2 publication Critical patent/EP0509265A2/en
Publication of EP0509265A3 publication Critical patent/EP0509265A3/en
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    • 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
    • B25B1/00—Vices
    • B25B1/06—Arrangements for positively actuating jaws
    • B25B1/18—Arrangements for positively actuating jaws motor driven, e.g. with fluid drive, with or without provision for manual actuation
    • 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
    • B25B1/00—Vices
    • B25B1/24—Details, e.g. jaws of special shape, slideways
    • 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
    • B25B1/00—Vices
    • B25B1/06—Arrangements for positively actuating jaws
    • B25B1/10—Arrangements for positively actuating jaws using screws
    • B25B1/103—Arrangements for positively actuating jaws using screws with one screw perpendicular to the jaw faces, e.g. a differential or telescopic screw

Definitions

  • the invention relates to a clamping force adjusting device for a clamping device, in particular a machine vise, with a hollow housing which is supported indirectly or directly on a movable clamping part (clamping jaws) thereof, which is optionally designed as a handle connected to a screw spindle, with a through the housing and compared to this rotatable and displaceable tie rod, the first end of which can be coupled to a power amplifier and the second end of which carries a tension sleeve which is fixed to this end and is provided with a support flange and which, in turn, is axially interposed with the interposition of an adjusting sleeve which can be adjusted axially by means of a fine thread, an axial bearing and several disc springs acts on the housing.
  • the housing is connected to a screw spindle and is designed as a hollow handle.
  • the screw spindle engages in the movable clamping jaw of a machine vice.
  • the screw spindle is hollow and the pull rod is guided through it, the first end of which is connected to a power amplifier arranged below the fixed clamping jaw.
  • the adjusting sleeve can be adjusted by means of a fine thread.
  • the adjusting sleeve is supported directly on disc springs, which in turn are supported on an axial bearing.
  • This thrust bearing in turn rests on the one hand on the support flange of the tension sleeve and on the other hand also on the housing.
  • the preload of the disc springs can be changed and the desired clamping force can be preset.
  • the spring force of the disc springs is so great that a tool, for example an open-ended wrench, is required to adjust the adjusting sleeve and the adjustment can nevertheless only be made with considerable effort.
  • the invention is therefore based on the object of providing a clamping force adjusting device for a clamping device, in particular a machine vice, of the type mentioned at the beginning, in which the clamping force can be easily adjusted by hand and without tools when the clamping device is relaxed.
  • the support flange is provided on the end of the tension sleeve adjacent to the second end of the pull rod and the axial bearing is arranged on the side of the support flange facing away from the second pull rod end in that the plate springs are supported directly in the housing, that between them and the axial bearing is provided on the one hand on this and on the other hand on the disc springs intermediate sleeve, and that the adjusting sleeve can be screwed into a fine thread of the housing and on its end facing the disc springs has a radially inwardly directed, first stop shoulder, which with a radially outwardly directed, second stop shoulder of the intermediate sleeve and / or a spacer ring bearing against the axial bearing cooperates in such a way that by screwing the adjusting sleeve relative to the housing, the axial distance of the first stop shoulder from the second stop shoulder or the spacer ing adjustable in the relaxation position and thereby the stroke of the intermediate sleeve
  • the adjusting sleeve in the new clamping force setting device is not supported on the axial bearing or on the plate springs in the relaxed position of the clamping device, no axial forces act on it in the relaxed position.
  • the adjusting sleeve for adjusting the clamping force can be easily turned by hand without tools and thus the desired clamping force can be easily set.
  • This clamping force is easily read on a scale attached to the adjusting sleeve. If a minimum clamping force is set, the first stop shoulder is at the greatest distance from the second stop shoulder or the spacer ring. This distance corresponds at least to the clamping stroke of the power amplifier.
  • the pull rod is moved through the housing in such a way that the pull sleeve approaches the disc springs.
  • the tension sleeve with the interposition of the thrust bearing and the intermediate sleeve, compresses the disc springs.
  • the clamping force then corresponds to the spring force achieved by the compression of the disc springs. If, on the other hand, the adjusting sleeve is rotated relative to the housing to the maximum clamping force, then with this setting of the clamping force, the inwardly directed first stop shoulder moves towards the second stop shoulder or the spacer ring and comes to rest against it.
  • the adjusting sleeve is set to a position between maximum and minimum clamping force, then the distance between its stop shoulder and the stop shoulder of the intermediate sleeve or the spacer ring is smaller than the clamping stroke of the booster.
  • the disk springs are first compressed by a certain distance during the clamping stroke, whereby a certain spring force is generated.
  • the stop shoulder of the adjusting sleeve comes into contact with the stop shoulder or the spacer ring and the remaining remaining clamping stroke of the power amplifier now causes the elastic deformation of the components of the clamping device involved in the tension.
  • the remainder of the clamping stroke is smaller than the maximum clamping stroke, a clamping force lying between the minimum and the maximum clamping force is achieved.
  • the tensioning device has a hollow housing 1, which in the exemplary embodiment shown is designed as a handle 1 a and can be connected to a screw spindle 2 in a rotationally fixed and tensile manner.
  • This screw 2 engages how 3 can be seen in a spindle nut 3, which can be connected to a movable jaw 4 of a vice.
  • a pull rod 5 is rotatably and axially displaceable, the first end 5a of which can be connected to a power amplifier (not shown).
  • This force booster can be arranged under the fixed jaw of a machine vice and is actuated, for example, by turning the pull rod 5, similarly as described in the aforementioned EP-A-0 463 344.
  • the adjustable clamping jaw By turning the screw spindle 2 by means of the handle 1 a, the adjustable clamping jaw can be adjusted in the direction B and thus the span of the machine vice can be adjusted. If the clamping force adjusting device is to be used on a clamping device with a predetermined clamping width, then the hollow screw spindle 2 is omitted. In this case, the housing 1 is supported directly on the movable clamping jaw 4.
  • the pull rod 5 is guided through the housing 1.
  • a tension sleeve 6 is screwed on or fixed in some other way.
  • This tension sleeve 6 has a support flange 7 at its end adjacent to the second end 5b.
  • An axial bearing 8 is supported on the side of this support flange 7 facing away from the second tie rod end 5b.
  • a plurality of disc springs 9 are supported directly in the housing 1 at its end 1b facing the movable jaw 4.
  • An intermediate sleeve 10 is arranged between the plate springs 9 and the axial bearing 8, sufficient clearance being provided between this intermediate sleeve 10 and the pull sleeve 6 so that the pull sleeve 6 can rotate relative to the intermediate sleeve 10.
  • the intermediate sleeve 10 has at its end facing the plate springs 9 a radially outwardly directed flange 11 which is supported on the plate springs 9.
  • the flange 11 is held axially on the side facing away from the plate springs 9 by a locking ring (circlip) 12 inserted into an annular groove in the housing 1.
  • the locking ring 12 can be arranged so that the plate springs 9 are already preloaded to a desired extent when the flange 11 and the locking ring 12 are inserted.
  • An adjusting sleeve 13 is also provided, which can be screwed axially by means of a fine thread 14 in the housing 1, more precisely in the housing part 1a.
  • the adjusting sleeve 13 carries a scale ring 15.
  • the adjusting sleeve 13 has a radially inwardly directed stop shoulder 16 at its end located within the housing 1.
  • This first stop shoulder 16 interacts with a second stop shoulder 17 provided on the intermediate sleeve 10 and / or with a spacer ring 18 which rests on the axial bearing 8.
  • the second stop shoulder 17 on the intermediate sleeve 10 is expediently formed by a retaining ring 17 inserted into an annular groove thereof.
  • This retaining ring 17 is partially surrounded by the spacer ring 18, the arrangement being such that the axial thickness of the spacer ring 18 corresponds to the distance that the side of the retaining ring facing the first stop shoulder 16 has from the end of the intermediate sleeve 10 which is on the thrust bearing 8 is present.
  • a disk 19 covering the locking ring 17 and the spacer ring 18 can also be provided.
  • the adjusting sleeve Since the adjusting sleeve is not acted upon by the plate springs 9 in the relaxed position of the clamping force adjusting device, it can be rotated very easily relative to the housing 1.
  • two radial bores 20 are provided in the stop shoulder 16 of the adjusting sleeve 13.
  • a compression spring 21 and a detent ball 22 are arranged in each of these bores.
  • the bores 20 are closed radially outwards by a ring 23 surrounding the adjusting sleeve 13.
  • the outer circumferential surface of the intermediate sleeve 10 is provided with a plurality of axial grooves 24 which are offset in the circumferential direction and which serve to engage the locking balls 22.
  • a friction ring (brake ring) can be provided between the adjusting sleeve 13 and the intermediate sleeve 10 or else the hollow handle 1a, which then enables the adjusting sleeve 13 to be adjusted continuously relative to the housing 1.
  • the clamping force setting device works as follows: In Figure 1, the clamping device is shown with minimal clamping force setting in a relaxed position. Here, the adjusting sleeve 13 is screwed so far into the housing 1 that a distance A is present between the first stop shoulder 16 and the intermediate disk 19, which is somewhat larger than the maximum clamping stroke of the power amplifier.
  • the power amplifier not shown, can be actuated by rotating the pull rod 5 by means of a hand lever attached to its end 5b. During the clamping stroke of the power amplifier, the pull rod 5 thus moves in the direction C relative to the housing 1, this clamping stroke, however, being only approximately 1-1.5 mm.
  • the pull rod takes the pull sleeve fixed on it 6 left with.
  • the disc springs 9 are compressed via the axial bearing 8 and the intermediate sleeve 10 and their flange 11. With a full clamping stroke, however, the intermediate disk 19 does not come into contact with the stop shoulder 16 with a minimal clamping force setting.
  • the plate springs 9 press the housing 1 and thus also the screw spindle 2 and the clamping jaw 4 to the left with a clamping force which corresponds to the spring force generated by the compression of the plate springs 9.
  • the clamping device is shown with maximum clamping force setting.
  • the adjusting sleeve 13 was screwed so far to the right relative to the housing 1 that its stop shoulder 16 abuts on the intermediate disk 19 and thus a direct frictional connection between the support flange 7 and the stop shoulder 16 with the interposition of the axial bearing 8, the spacer ring 18, the retaining ring 17 and the washer 19 is made. If the tension rod 5 is now pulled in the direction C during the tension stroke of the power amplifier, the force flow takes place from the pull sleeve 6 via the latter parts to the stop shoulder 16 of the adjusting sleeve 13 and from there via the fine thread 14 to the housing 1.
  • the plate springs 9 are in this Case not burdened by tension forces.
  • the clamping stroke of the power amplifier leads to an elastic deformation of the various vice components involved in the clamping, such as pull rod 5, spindle 2, spindle nut 3, movable clamping jaw 4, fixed clamping jaw and vice base.
  • the desired high clamping force of, for example, 40 kN can be built up.
  • the adjusting sleeve 13 To preset an average clamping force lying between the minimum and the maximum clamping force, the adjusting sleeve 13 is in a rotational position relative to the Housing 1 rotated, in which the distance A between its stop shoulder 16 and the washer 19 corresponds to a size which is between zero and the maximum clamping stroke of the power amplifier.
  • the adjusting sleeve 13 can be rotated into ten to twenty intermediate positions and thus ten to twenty different presetting force settings can be made, which lie between the minimum and the maximum clamping force. If the pull rod 5 is now moved to the left with an average clamping force setting during the clamping stroke, then the pull sleeve 6 can move to the left until the intermediate disk 19 lies against the stop shoulder 16.
  • the clamping force adjusting device according to the invention can also be applied to pressure spindles by reversal.

Abstract

The clamping force adjusting device for a clamp device comprises a hollow housing (1) supported on a movable clamping part of the same, through which housing passes a rotatable and slidable tension rod (5), whose first end can be coupled to a force amplifier and whose second end (5b) carries a tension sleeve (6) fixed thereon. The tension sleeve (6) is supported on Belleville springs (9) through a thrust bearing (8) and an intermediate sleeve (b 10), the Belleville springs being supported directly in the housing (1). An adjusting sleeve (13) screws into a fine thread (14) of the housing (1) and has at its end facing the Belleville springs (9) a radially inwardly directed first stop shoulder (16), which cooperates with a radially outwardly directed second stop shoulder (17) of the intermediate sleeve (10) and/or a spacer ring (18) bearing on the thrust bearing (8).

Description

Die Erfindung betrifft eine Spannkrafteinstellvorrichtung für eine Spannvorrichtung, insbesondere einen Maschinenschraubstock, mit einem mittelbar oder unmittelbar an einem beweglichen Spannteil (Spannbacken) derselben abgestützten, hohlen Gehäuse, welches gegebenenfalls als ein mit einer Schraubspindel verbundener Handgriff ausgebildet ist, mit einer durch das Gehäuse geführten und gegenüber diesem dreh- und verschiebbaren Zugstange, deren erstes Ende mit einem Kraftverstärker kuppelbar ist und deren zweites Ende eine an diesem Ende fixierte, mit einem Stützflansch versehene Zughülse trägt, die ihrerseits unter Zwischenschaltung einer mittels Feingewinde axial verstellbaren Einstellhülse, eines Axiallagers und mehrerer Tellerfedern axial auf das Gehäuse einwirkt.The invention relates to a clamping force adjusting device for a clamping device, in particular a machine vise, with a hollow housing which is supported indirectly or directly on a movable clamping part (clamping jaws) thereof, which is optionally designed as a handle connected to a screw spindle, with a through the housing and compared to this rotatable and displaceable tie rod, the first end of which can be coupled to a power amplifier and the second end of which carries a tension sleeve which is fixed to this end and is provided with a support flange and which, in turn, is axially interposed with the interposition of an adjusting sleeve which can be adjusted axially by means of a fine thread, an axial bearing and several disc springs acts on the housing.

Bei einer derartigen Spannkrafteinstellvorrichtung (vgl. EP-A-0 463 344. Dieses Dokument stellt Stand der Technik gemäß Art. 54(3) EPÜ dar.) ist das Gehäuse mit einer Schraubspindel verbunden und als hohler Handgriff ausgebildet. Die Schraubspindel greift in die bewegliche Spannbacke eines Maschinenschraubstockes ein. Die Schraubspindel ist hohl ausgebildet und durch sie ist die Zugstange hindurchgeführt, deren erstes Ende mit einem unterhalb der festen Spannbacke angeordneten Kraftverstärker verbunden ist. Auf der dem zweiten Ende der Zugstange zugekehrten Ende der Zughülse ist die Einstellhülse mittels eines Feingewindes verstellbar. Die Einstellhülse stützt sich unmittelbar an Tellerfedern ab, die sich ihrerseits an einem Axiallager abstützen. Dieses Axiallager wiederum liegt einerseits am Stützflansch der Zughülse und andererseits auch am Gehäuse an. Durch Verdrehung der Einstellhülse gegenüber der Zughülse kann die Vorspannung der Tellerfedern verändert und damit die gewünschte Spannkraft voreingestellt werden. Insbesondere bei größeren Spannvorrichtungen mit einer maximalen Spannkraft von 40 kN und mehr ist jedoch die Federkraft der Tellerfedern so groß, daß zur Verstellung der Einstellhülse ein Werkzeug, beispielsweise ein Gabelschlüssel, erforderlich ist und trotzdem die Einstellung nur mit erheblichem Kraftaufwand vorgenommen werden kann.In the case of such a clamping force adjusting device (cf. EP-A-0 463 344. This document represents prior art according to Art. 54 (3) EPC), the housing is connected to a screw spindle and is designed as a hollow handle. The screw spindle engages in the movable clamping jaw of a machine vice. The screw spindle is hollow and the pull rod is guided through it, the first end of which is connected to a power amplifier arranged below the fixed clamping jaw. On the end of the pull sleeve facing the second end of the pull rod, the adjusting sleeve can be adjusted by means of a fine thread. The adjusting sleeve is supported directly on disc springs, which in turn are supported on an axial bearing. This thrust bearing in turn rests on the one hand on the support flange of the tension sleeve and on the other hand also on the housing. By turning the adjusting sleeve in relation to the tension sleeve, the preload of the disc springs can be changed and the desired clamping force can be preset. Especially with larger clamping devices with a maximum clamping force of 40 kN and more, however, the spring force of the disc springs is so great that a tool, for example an open-ended wrench, is required to adjust the adjusting sleeve and the adjustment can nevertheless only be made with considerable effort.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Spannkrafteinstellvorrichtung für eine Spannvorrichtung, insbesondere einen Maschinenschraubstock, der eingangs erwähnten Art zu schaffen, bei der die Spannkraft bei entspannter Spannvorrichtung leicht von Hand und ohne Werkzeug einstellbar ist.The invention is therefore based on the object of providing a clamping force adjusting device for a clamping device, in particular a machine vice, of the type mentioned at the beginning, in which the clamping force can be easily adjusted by hand and without tools when the clamping device is relaxed.

Dies wird nach der Erfindung dadurch erreicht, daß der Stützflansch an dem dem zweiten Ende der Zugstange benachbarten Ende der Zughülse vorgesehen und das Axiallager an der dem zweiten Zugstangenende abgewandten Seite des Stützflansches angeordnet ist, daß die Tellerfedern unmittelbar im Gehäuse abgestützt sind, daß zwischen diesen und dem Axiallager eine sich einerseits an diesem und andererseits an den Tellerfedern abstützende Zwischenhülse vorgesehen ist, und daß die Einstellhülse in einem Feingewinde des Gehäuses verschraubbar ist und an ihrem, den Tellerfedern zugekehrten Ende eine radial nach innen gerichtete, erste Anschlagschulter aufweist, die mit einer radial nach außen gerichteten, zweiten Anschlagschulter der Zwischenhülse und/oder einem am Axiallager anliegenden Distanzring derart zusammenwirkt, daß durch Verschrauben der Einstellhülse gegenüber dem Gehäuse der axiale Abstand der ersten Anschlagschulter von der zweiten Anschlagschulter bzw. dem Distanzring in Entspannstellung einstellbar und hierdurch der Hub der Zwischenhülse, den diese beim Spannen bis zur Anlage der ersten Anschlagschulter an der zweiten Anschlagschulter bzw. dem Distanzring ausführt, einstellbar ist.This is achieved according to the invention in that the support flange is provided on the end of the tension sleeve adjacent to the second end of the pull rod and the axial bearing is arranged on the side of the support flange facing away from the second pull rod end in that the plate springs are supported directly in the housing, that between them and the axial bearing is provided on the one hand on this and on the other hand on the disc springs intermediate sleeve, and that the adjusting sleeve can be screwed into a fine thread of the housing and on its end facing the disc springs has a radially inwardly directed, first stop shoulder, which with a radially outwardly directed, second stop shoulder of the intermediate sleeve and / or a spacer ring bearing against the axial bearing cooperates in such a way that by screwing the adjusting sleeve relative to the housing, the axial distance of the first stop shoulder from the second stop shoulder or the spacer ing adjustable in the relaxation position and thereby the stroke of the intermediate sleeve, which it executes when tensioning until the first stop shoulder rests against the second stop shoulder or the spacer ring.

Da sich bei der neuen Spannkrafteinstellvorrichtung die Einstellhülse in Entspannstellung der Spannvorrichtung weder am Axiallager noch an den Tellerfedern abstützt, wirken auf sie in Entspannstellung keinerlei Axialkräfte ein. Infolgedessen läßt sich die Einstellhülse zur Verstellung der Spannkraft von Hand ohne Werkzeug leicht drehen und damit die jeweils gewünschte Spannkraft leicht einstellen. Diese Spannkraft ist an einer an der Einstellhülse angebrachten Skala leicht ablesbar. Bei Einstellung einer minimalen Spannkraft weist die erste Anschlagschulter gegenüber der zweiten Anschlagschulter bzw. dem Distanzring den größten Abstand auf. Dieser Abstand entspricht mindestens dem Spannhub des Kraftverstärkers. Beim Spannhub des Kraftverstärkers wird die Zugstange so durch das Gehäuse bewegt, daß sich die Zughülse den Tellerfedern nähert. Hierdurch drückt die Zughülse unter Zwischenschaltung des Axiallagers und der Zwischenhülse die Tellerfedern zusammen. Die Spannkraft entspricht dann der durch die Zusammendrückung der Tellerfedern erzielten Federkraft. Wird hingegen die Einstellhülse gegenüber dem Gehäuse auf maximale Spannkraft verdreht, so bewegt sich bei dieser Einstellung der Spannkraft die nach innen gerichtete erste Anschlagschulter zu der zweiten Anschlagschulter bzw. dem Distanzring hin und kommt hieran zur Anlage. Hierdurch ist beim Spannhub des Kraftverstärkers keine gegenseitige axiale Bewegung der Zwischenhülse und der Zughülse gegenüber der Einstellhülse mehr möglich. Die gesamte, beim Spannhub des Kraftverstärkers in die Zugstange eingeleitete Axialkraft wird unmittelbar von der Zughülse über das Axiallager und von diesem über die zweite Anschlagschulter bzw. den Distanzring auf die Anschlagschulter der Einstellhülse und von dieser über das Feingewinde auf das Gehäuse übertragen. Der Spannhub des Kraftverstärkers führt zu einer elastischen Verformung der verschiedenen, an der Spannung beteiligten Komponenten der Spannvorrichtung, wie Zugstange, Schraubspindel, Spindelmutter, Spannbacken und Grundkörper der Spannvorrichtung. Wird die Einstellhülse in eine zwischen maximaler und minimaler Spannkraft befindliche Stellung eingestellt, dann ist der Abstand zwischen ihrer Anschlagschulter und der Anschlagschulter der Zwischenhülse bzw. dem Distanzring kleiner als der Spannhub des Kraftverstärkers. In diesem Fall werden beim Spannhub zunächst die Tellerfedern um einen gewissen Weg zusammengedrückt, wodurch eine bestimmte Federkraft erzeugt wird. Dann kommt die Anschlagschulter der Einstellhülse an der Anschlagschulter bzw. dem Distanzring zur Anlage und der verbleibende restliche Spannhub des Kraftverstärkers bewirkt nunmehr die elastische Verformung der an der Spannung beteiligten Komponenten der Spannvorrichtung. Da jedoch der verbleibende Rest des Spannhubes kleiner ist als der maximale Spannhub wird eine zwischen der minimalen und der maximalen Spannkraft liegende Spannkraft erzielt.Since the adjusting sleeve in the new clamping force setting device is not supported on the axial bearing or on the plate springs in the relaxed position of the clamping device, no axial forces act on it in the relaxed position. As a result, the adjusting sleeve for adjusting the clamping force can be easily turned by hand without tools and thus the desired clamping force can be easily set. This clamping force is easily read on a scale attached to the adjusting sleeve. If a minimum clamping force is set, the first stop shoulder is at the greatest distance from the second stop shoulder or the spacer ring. This distance corresponds at least to the clamping stroke of the power amplifier. During the tension stroke of the power amplifier, the pull rod is moved through the housing in such a way that the pull sleeve approaches the disc springs. As a result, the tension sleeve, with the interposition of the thrust bearing and the intermediate sleeve, compresses the disc springs. The clamping force then corresponds to the spring force achieved by the compression of the disc springs. If, on the other hand, the adjusting sleeve is rotated relative to the housing to the maximum clamping force, then with this setting of the clamping force, the inwardly directed first stop shoulder moves towards the second stop shoulder or the spacer ring and comes to rest against it. As a result, no mutual axial movement of the intermediate sleeve and the pull sleeve relative to the adjusting sleeve is possible during the tension stroke of the power amplifier. The entire axial force introduced into the pull rod during the tension stroke of the booster is transmitted directly from the tension sleeve via the thrust bearing and from there via the second stop shoulder or the spacer ring to the stop shoulder of the adjusting sleeve and from there via the fine thread to the housing. The tension stroke of the power amplifier leads to an elastic deformation of the various components of the tensioning device involved in the tension, such as pull rod, screw spindle, spindle nut, clamping jaws and base body Jig. If the adjusting sleeve is set to a position between maximum and minimum clamping force, then the distance between its stop shoulder and the stop shoulder of the intermediate sleeve or the spacer ring is smaller than the clamping stroke of the booster. In this case, the disk springs are first compressed by a certain distance during the clamping stroke, whereby a certain spring force is generated. Then the stop shoulder of the adjusting sleeve comes into contact with the stop shoulder or the spacer ring and the remaining remaining clamping stroke of the power amplifier now causes the elastic deformation of the components of the clamping device involved in the tension. However, since the remainder of the clamping stroke is smaller than the maximum clamping stroke, a clamping force lying between the minimum and the maximum clamping force is achieved.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Advantageous embodiments of the invention are characterized in the subclaims.

Die Erfindung ist in folgendem, anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert. Es zeigen:

Figur 1
einen Axialschnitt der Spannkrafteinstellvorrichtung bei minimal eingestellter Spannkraft,
Figur 2
einen Axialschnitt bei maximal eingestellter Spannkraft, jeweils in entspannter Stellung,
Figur 3
einen Axialschnitt der Spannvorrichtung mit Schraubspindel und kompletter Zugstange.
The invention is explained in more detail below with reference to an embodiment shown in the drawing. Show it:
Figure 1
an axial section of the clamping force setting device with a minimally set clamping force,
Figure 2
an axial section with the maximum clamping force set, in each case in a relaxed position,
Figure 3
an axial section of the clamping device with screw spindle and complete pull rod.

Die Spannvorrichtung weist ein hohles Gehäuse 1 auf, welches bei dem gezeigten Ausführungsbeispiel als Handgriff 1a ausgebildet ist und drehfest sowie zugfest mit einer Schraubspindel 2 verbunden sein kann. Diese Schraubspindel 2 greift, wie anhand der Figur 3 ersichtlich ist, in eine Spindelmutter 3 ein, welche mit einer beweglichen Spannbacke 4 eines Schraubstockes verbunden sein kann. In der hohlen Schraubspindel 2 ist drehbar und axial verschiebbar eine Zugstange 5 angeordnet, deren erstes Ende 5a mit einem nicht dargestellten Kraftverstärker verbindbar ist. Dieser Kraftverstärker kann unter der feststehenden Backe eines Maschinenschraubstockes angeordnet sein und wird beispielsweise durch Verdrehen der Zugstange 5 betätigt, ähnlich, wie es in der eingangs genannten EP-A-0 463 344 beschrieben ist. Durch Verdrehen der Schraubspindel 2 mittels des Handgriffes 1a kann die verstellbare Spannbacke in Richtung B verstellt werden und damit die Spannweite des Maschinenschraubstockes eingestellt werden. Wenn die Spannkrafteinstellvorrichtung an einer Spannvorrichtung mit vorbestimmter Spannweite verwendet werden soll, dann entfällt die hohle Schraubspindel 2. In diesem Fall stützt sich das Gehäuse 1 unmittelbar an der beweglichen Spannbacke 4 ab.The tensioning device has a hollow housing 1, which in the exemplary embodiment shown is designed as a handle 1 a and can be connected to a screw spindle 2 in a rotationally fixed and tensile manner. This screw 2 engages how 3 can be seen in a spindle nut 3, which can be connected to a movable jaw 4 of a vice. In the hollow screw spindle 2 a pull rod 5 is rotatably and axially displaceable, the first end 5a of which can be connected to a power amplifier (not shown). This force booster can be arranged under the fixed jaw of a machine vice and is actuated, for example, by turning the pull rod 5, similarly as described in the aforementioned EP-A-0 463 344. By turning the screw spindle 2 by means of the handle 1 a, the adjustable clamping jaw can be adjusted in the direction B and thus the span of the machine vice can be adjusted. If the clamping force adjusting device is to be used on a clamping device with a predetermined clamping width, then the hollow screw spindle 2 is omitted. In this case, the housing 1 is supported directly on the movable clamping jaw 4.

Die Zugstange 5 ist durch das Gehäuse 1 geführt. Auf ihr innerhalb des Gehäuses 1 befindliches zweites Ende 5b ist eine Zughülse 6 aufgeschraubt oder in sonstiger Weise fixiert. Diese Zughülse 6 weist an ihrem, dem zweiten Ende 5b benachbarten Ende einen Stützflansch 7 auf. An der dem zweiten Zugstangenende 5b abgekehrten Seite dieses Stützflansches 7 ist ein Axiallager 8 abgestützt. Mehrere Tellerfedern 9 stützen sich unmittelbar im Gehäuse 1 an dessen, der beweglichen Backe 4 zugekehrten Ende 1b ab. Zwischen den Tellerfedern 9 und dem Axiallager 8 ist eine Zwischenhülse 10 angeordnet, wobei zwischen dieser Zwischenhülse 10 und der Zughülse 6 ausreichend Spiel vorgesehen ist, damit sich die Zughülse 6 gegenüber der Zwischenhülse 10 drehen kann.The pull rod 5 is guided through the housing 1. On its second end 5b located within the housing 1, a tension sleeve 6 is screwed on or fixed in some other way. This tension sleeve 6 has a support flange 7 at its end adjacent to the second end 5b. An axial bearing 8 is supported on the side of this support flange 7 facing away from the second tie rod end 5b. A plurality of disc springs 9 are supported directly in the housing 1 at its end 1b facing the movable jaw 4. An intermediate sleeve 10 is arranged between the plate springs 9 and the axial bearing 8, sufficient clearance being provided between this intermediate sleeve 10 and the pull sleeve 6 so that the pull sleeve 6 can rotate relative to the intermediate sleeve 10.

Die Zwischenhülse 10 weist an ihrem, den Tellerfedern 9 zugekehrten Ende einen radial nach außen gerichteten, sich an den Tellerfedern 9 abstützenden Flansch 11 auf. Der Flansch 11 ist an der den Tellerfedern 9 abgewandten Seite durch einen in eine Ringnut des Gehäuses 1 eingesetzten Sicherungsring (Seegerring) 12 axial gehalten. Hierbei kann der Sicherungsring 12 so angeordnet werden, daß die Tellerfedern 9 beim Einsetzen des Flansches 11 und des Sicherungsringes 12 bereits in einem gewünschten Maß vorgespannt werden.The intermediate sleeve 10 has at its end facing the plate springs 9 a radially outwardly directed flange 11 which is supported on the plate springs 9. The flange 11 is held axially on the side facing away from the plate springs 9 by a locking ring (circlip) 12 inserted into an annular groove in the housing 1. Here, the locking ring 12 can be arranged so that the plate springs 9 are already preloaded to a desired extent when the flange 11 and the locking ring 12 are inserted.

Es ist ferner eine Einstellhülse 13 vorgesehen, die mittels eines Feingewindes 14 in dem Gehäuse 1, genauer gesagt im Gehäuseteil 1a, axial verschraubbar ist. Die Einstellhülse 13 trägt einen Skalenring 15. Ferner weist die Einstellhülse 13 an ihrem innerhalb des Gehäuses 1 befindlichen Ende eine radial nach innen gerichtete Anschlagschulter 16 auf. Diese erste Anschlagschulter 16 wirkt mit einer zweiten, an der Zwischenhülse 10 vorgesehenen Anschlagschulter 17 und/oder mit einem Distanzring 18 zusammen, der am Axiallager 8 anliegt. Aus Montagegründen ist die zweite Anschlagschulter 17 an der Zwischenhülse 10 zweckmäßig durch einen in eine Ringnut derselben eingesetzten Sicherungsring 17 gebildet. Dieser Sicherungsring 17 ist teilweise von dem Distanzring 18 umgeben, wobei die Anordnung so getroffen ist, daß die axiale Dicke des Distanzringes 18 dem Abstand entspricht, den die der ersten Anschlagschulter 16 zugekehrte Seite des Sicherungsringes von demjenigen Ende der Zwischenhülse 10 hat, welches am Axiallager 8 anliegt.An adjusting sleeve 13 is also provided, which can be screwed axially by means of a fine thread 14 in the housing 1, more precisely in the housing part 1a. The adjusting sleeve 13 carries a scale ring 15. Furthermore, the adjusting sleeve 13 has a radially inwardly directed stop shoulder 16 at its end located within the housing 1. This first stop shoulder 16 interacts with a second stop shoulder 17 provided on the intermediate sleeve 10 and / or with a spacer ring 18 which rests on the axial bearing 8. For reasons of assembly, the second stop shoulder 17 on the intermediate sleeve 10 is expediently formed by a retaining ring 17 inserted into an annular groove thereof. This retaining ring 17 is partially surrounded by the spacer ring 18, the arrangement being such that the axial thickness of the spacer ring 18 corresponds to the distance that the side of the retaining ring facing the first stop shoulder 16 has from the end of the intermediate sleeve 10 which is on the thrust bearing 8 is present.

Um eine gleichmäßige Kraftübertragung von dem Distanzring 18 und dem Sicherungsring 17 auf die erste Anschlagschulter 16 zu erreichen, kann ferner auch noch eine den Sicherungsring 17 und den Distanzring 18 überdeckende Scheibe 19 vorgesehen sein.In order to achieve a uniform power transmission from the spacer ring 18 and the locking ring 17 to the first stop shoulder 16, a disk 19 covering the locking ring 17 and the spacer ring 18 can also be provided.

Da die Einstellhülse in entspannter Stellung der Spannkrafteinstellvorrichtung nicht von den Tellerfedern 9 beaufschlagt wird, läßt sie sich sehr leicht gegenüber dem Gehäuse 1 drehen. Um eine ungewollte Verstellung der Einstellhülse 13 zu vermeiden und sie in ihrer jeweils eingestellten Drehstellung gegenüber dem Gehäuse 1 zu sichern, sind in der Anschlagschulter 16 der Einstellhülse 13 zwei radiale Bohrungen 20 vorgesehen. In jeder dieser Bohrungen ist eine Druckfeder 21 und eine Rastkugel 22 angeordnet. Die Bohrungen 20 sind radial nach außen durch einen die Einstellhülse 13 umschließenden Ring 23 verschlossen. Die äußere Mantelfläche der Zwischenhülse 10 ist mit mehreren, in Umfangsrichtung zueinander versetzten Axialnuten 24 versehen, die zum Eingriff der Rastkugeln 22 dienen. Anstelle dieser stufenweise funktionierenden Verrastungsvorrichtung kann zwischen der Einstellhülse 13 und der Zwischenhülse 10 oder auch dem hohlen Handgriff 1a ein Reibring (Bremsring) vorgesehen sein, der dann eine stufenlose Verstellung der Einstellhülse 13 gegenüber dem Gehäuse 1 ermöglicht.Since the adjusting sleeve is not acted upon by the plate springs 9 in the relaxed position of the clamping force adjusting device, it can be rotated very easily relative to the housing 1. In order to avoid an unwanted adjustment of the adjusting sleeve 13 and to secure it in its respectively set rotational position with respect to the housing 1, two radial bores 20 are provided in the stop shoulder 16 of the adjusting sleeve 13. A compression spring 21 and a detent ball 22 are arranged in each of these bores. The bores 20 are closed radially outwards by a ring 23 surrounding the adjusting sleeve 13. The outer circumferential surface of the intermediate sleeve 10 is provided with a plurality of axial grooves 24 which are offset in the circumferential direction and which serve to engage the locking balls 22. Instead of this step-by-step locking device, a friction ring (brake ring) can be provided between the adjusting sleeve 13 and the intermediate sleeve 10 or else the hollow handle 1a, which then enables the adjusting sleeve 13 to be adjusted continuously relative to the housing 1.

Die Wirkungsweise der Spannkrafteinstellvorrichtung ist folgende:
In Figur 1 ist die Spannvorrichtung mit minimaler Spannkrafteinstellung in entspannter Stellung gezeigt. Hierbei ist die Einstellhülse 13 so weit in das Gehäuse 1 hineinverschraubt, daß zwischen der ersten Anschlagschulter 16 und der Zwischenscheibe 19 ein Abstand A vorhanden ist, der etwas größer ist als der maximale Spannhub des Kraftverstärkers. Der nicht dargestellte Kraftverstärker kann durch Drehung der Zugstange 5 mittels eines an ihrem Ende 5b angesetzten Handhebels betätigt werden. Beim Spannhub des Kraftverstärkers bewegt sich hierdurch die Zugstange 5 gegenüber dem Gehäuse 1 in Richtung C, wobei dieser Spannhub jedoch nur etwa 1 - 1,5 mm beträgt. Hierbei nimmt die Zugstange die auf ihr fixierte Zughülse 6 nach links mit. Über das Axiallager 8 sowie die Zwischenhülse 10 und ihren Flansch 11 werden die Tellerfedern 9 zusammengedrückt. Bei vollem Spannhub kommt jedoch die Zwischenscheibe 19 bei minimaler Spannkrafteinstellung nicht an der Anschlagschulter 16 zur Anlage. Die Tellerfedern 9 drücken das Gehäuse 1 und damit auch die Schraubspindel 2 und die Spannbacke 4 mit einer Spannkraft nach links, die der durch die Zusammendrückung der Tellerfedern 9 erzeugten Federkraft entspricht.The clamping force setting device works as follows:
In Figure 1, the clamping device is shown with minimal clamping force setting in a relaxed position. Here, the adjusting sleeve 13 is screwed so far into the housing 1 that a distance A is present between the first stop shoulder 16 and the intermediate disk 19, which is somewhat larger than the maximum clamping stroke of the power amplifier. The power amplifier, not shown, can be actuated by rotating the pull rod 5 by means of a hand lever attached to its end 5b. During the clamping stroke of the power amplifier, the pull rod 5 thus moves in the direction C relative to the housing 1, this clamping stroke, however, being only approximately 1-1.5 mm. The pull rod takes the pull sleeve fixed on it 6 left with. The disc springs 9 are compressed via the axial bearing 8 and the intermediate sleeve 10 and their flange 11. With a full clamping stroke, however, the intermediate disk 19 does not come into contact with the stop shoulder 16 with a minimal clamping force setting. The plate springs 9 press the housing 1 and thus also the screw spindle 2 and the clamping jaw 4 to the left with a clamping force which corresponds to the spring force generated by the compression of the plate springs 9.

In Figur 2 ist die Spannvorrichtung mit maximaler Spannkrafteinstellung dargestellt. Hierzu wurde die Einstellhülse 13 gegenüber dem Gehäuse 1 so weit nach rechts verschraubt, daß ihre Anschlagschulter 16 an der Zwischenscheibe 19 anliegt und damit ein unmittelbarer Kraftschluß zwischen dem Stützflansch 7 und der Anschlagschulter 16 unter Zwischenschaltung des Axiallagers 8, des Distanzringes 18, des Sicherungsringes 17 und der Zwischenscheibe 19 hergestellt ist. Wird nun beim Spannhub des Kraftverstärkers die Zugstange 5 in Richtung C gezogen, so erfolgt der Kraftfluß von der Zughülse 6 über letztgenannte Teile auf die Anschlagschulter 16 der Einstellhülse 13 und von dieser über das Feingewinde 14 auf das Gehäuse 1. Die Tellerfedern 9 werden in diesem Fall durch Spannkräfte nicht belastet. Der Spannhub des Kraftverstärkers führt zu einer elastischen Verformung der verschiedenen, an der Spannung beteiligten Schraubstockkomponenten, wie Zugstange 5, Spindel 2, Spindelmutter 3, bewegliche Spannbacke 4, feste Spannbacke und Schraubstockgrundkörper. Auf diese Weise kann die gewünschte hohe Spannkraft von beispielsweise 40 kN aufgebaut werden.In Figure 2, the clamping device is shown with maximum clamping force setting. For this purpose, the adjusting sleeve 13 was screwed so far to the right relative to the housing 1 that its stop shoulder 16 abuts on the intermediate disk 19 and thus a direct frictional connection between the support flange 7 and the stop shoulder 16 with the interposition of the axial bearing 8, the spacer ring 18, the retaining ring 17 and the washer 19 is made. If the tension rod 5 is now pulled in the direction C during the tension stroke of the power amplifier, the force flow takes place from the pull sleeve 6 via the latter parts to the stop shoulder 16 of the adjusting sleeve 13 and from there via the fine thread 14 to the housing 1. The plate springs 9 are in this Case not burdened by tension forces. The clamping stroke of the power amplifier leads to an elastic deformation of the various vice components involved in the clamping, such as pull rod 5, spindle 2, spindle nut 3, movable clamping jaw 4, fixed clamping jaw and vice base. In this way, the desired high clamping force of, for example, 40 kN can be built up.

Zur Voreinstellung einer zwischen der minimalen und der maximalen Spannkraft liegenden mittleren Spannkraft wird die Einstellhülse 13 in eine Drehstellung gegenüber dem Gehäuse 1 gedreht, bei der der Abstand A zwischen ihrer Anschlagschulter 16 und der Zwischenscheibe 19 einer Größe entspricht, die zwischen Null und dem maximalen Spannhub des Kraftverstärkers liegt. Je nach Anzahl der Axialnuten 24 kann die Einstellhülse 13 in zehn bis zwanzig Zwischenstellungen gedreht werden und damit zehn bis zwanzig verschiedene Spannkraftvoreinstellungen vorgenommen werden, die zwischen der minimalen und der maximalen Spannkraft liegen. Wenn nun bei einer mittleren Spannkrafteinstellung beim Spannhub die Zugstange 5 nach links bewegt wird, dann kann sich die Zughülse 6 so lange nach links bewegen, bis die Zwischenscheibe 19 an der Anschlagschulter 16 anliegt. Hierdurch erfolgt eine Zusammendrückung der Tellerfeder 9, die jedoch kleiner ist als bei minimaler Spannkrafteinstellung. Dementsprechend ist bei mittlerer Spannkrafteinstellung die von den Tellerfedern erzeugte Federkraft geringer. Sobald die Zwischenscheibe 19 an der Anschlagschulter 16 anliegt, erfolgt der Kraftfluß von dem Stützflansch 7 über das Axiallager 8, den Distanzring 18, den Sicherungsring 17, die Zwischenscheibe 19 auf die Anschlagschulter 16 und von dieser über die Stellhülse 13 und das Feingewinde 14 auf das Gehäuse 1. Da jedoch ein Teil des gesamten Spannhubes des Kraftverstärkers bereits zum teilweisen Spannen der Tellerfedern diente, führt der restliche Spannhub zu einer geringeren elastischen Verformung der an der Spannung beteiligten Schraubstock-Komponenten und dementsprechend auch zu einer geringeren Spannkraft, die sich zusammensetzt aus der durch die elastische Verformung der Schraubstock-Komponenten erzeugten Kraft und der durch die Zusammendrückung der Tellerfedern 9 erzeugten Federkraft.To preset an average clamping force lying between the minimum and the maximum clamping force, the adjusting sleeve 13 is in a rotational position relative to the Housing 1 rotated, in which the distance A between its stop shoulder 16 and the washer 19 corresponds to a size which is between zero and the maximum clamping stroke of the power amplifier. Depending on the number of axial grooves 24, the adjusting sleeve 13 can be rotated into ten to twenty intermediate positions and thus ten to twenty different presetting force settings can be made, which lie between the minimum and the maximum clamping force. If the pull rod 5 is now moved to the left with an average clamping force setting during the clamping stroke, then the pull sleeve 6 can move to the left until the intermediate disk 19 lies against the stop shoulder 16. This results in a compression of the plate spring 9, which, however, is smaller than with a minimum clamping force setting. Accordingly, the spring force generated by the plate springs is lower at a medium clamping force setting. As soon as the washer 19 abuts the stop shoulder 16, the power flow from the support flange 7 via the thrust bearing 8, the spacer ring 18, the locking ring 17, the washer 19 to the stop shoulder 16 and from this via the adjusting sleeve 13 and the fine thread 14 on Housing 1. However, since part of the entire clamping stroke of the power amplifier was already used for partial clamping of the plate springs, the remaining clamping stroke leads to less elastic deformation of the vice components involved in the clamping and accordingly to a lower clamping force, which is composed of the force generated by the elastic deformation of the vise components and the spring force generated by the compression of the disc springs 9.

Die erfindungsgemäße Spannkrafteinstellvorrichtung läßt sich durch Umkehrung auch bei Druckspindeln anwenden.The clamping force adjusting device according to the invention can also be applied to pressure spindles by reversal.

Claims (8)

  1. A clamping force adjusting device for a clamp device, especially a machine vice, with a hollow housing (1) supported directly or indirectly on a movable clamp part (4) of the same, which housing is formed if desired as a hand grip (1a) connected to a screw spindle (2), with a tension rod (5) passing through the housing (1) and rotatable and slidable relative thereto, the first end (5a) of the tension rod being capable of coupling to a force amplifier and its second end (5b) carrying a tension sleeve (6) provided with an abutment flange (7) and fixed on this end, the tension sleeve for its part acting axially on the housing (1) through an adjusting sleeve (13) axially adjustable by means of a fine thread (14), a thrust bearing (8) and a plurality of Belleville springs (9), whereat the abutment flange (7) is provided on the end of the tension sleeve (6) adjoining the second end (5b) of the tension rod (5) and the thrust hearing (8) is provided on the side of the abutment flange (7) facing away from the second tension rod end (5b) , in that the Belleville springs (9) are supported directly in the housing (1), in that an intermediate sleeve (10) is provided between the Belleville springs and the thrust bearing (8) , abutting tie thrust bearing on one side and abutting the Belleville springs (9) on the other side, and in that the adjusting sleeve (13) can screw into a fine thread (14) of the housing (1) and has a radially inwardly directed first stop shoulder (16) on its end facing the Belleville springs (9), this shoulder so cooperating with a radially outwardly directed second stop shoulder (17) of the intermediate sleeve (10) and/or a spacer ring (18) bearing on the thrust bearing (8) that the axial spacing (A) of the first stop shoulder (16) from the second stop shoulder (17) or from the spacer ring (18) is adjustable in the unstressed state by screwing the adjusting sleeve (13) relative to the housing (1), whereby the stroke of the intermediate sleeve (10) which this performs on tightening up to abutment of the first stop shoulder (16) on the second stop shoulder (17) or the spacer ring (18) is adjustable.
  2. Device according to claim 1, characterized in that the stop shoulder on the intermediate sleeve (10) is formed by a retaining ring (17) fitted in an annular groove of the same.
  3. Device according to claim 1 or 2, characterized in that the retaining ring (17) is surrounded by the spacer ring (18).
  4. Device according to claim 1, characterized in that the maximum adjustable spacing (A) between the first stop shoulder (16) and the second stop shoulder (17) or the spacer ring (18) is somewhat greater than the maximum tightening stroke of the force amplifier.
  5. Device according to claim 1, characterized in that the intermediate sleeve (10) has a radially outwardly directed flange (11) bearing on the Belleville springs (9) at its end facing the Belleville springs (9).
  6. Device according to claim 5, characterized in that the flange (11) is retained on the side facing away from the Belleville springs (9) by a retaining ring (12) fitted in an annular groove of the housing (1).
  7. Device according to any of the preceding claims, characterized in that the adjusting sleeve (13 is retained in its current rotational position relative to the housing (1) by a friction ring (brake ring) or by spring-loaded detent balls (22) engaging in notches (24).
  8. Device according to claim 7, characterized in that radial bores (20) are provided in the stop shoulder (16) of the adjusting sleeve (13), each bore with a detent ball (22) and compression spring (21) loading the ball, and in that the outer peripheral surface of the intermediate sleeve (10) has a plurality of axial grooves (24) spaced in the peripheral direction for engagement with the detent balls (22).
EP92104834A 1991-04-17 1992-03-20 Adjustment of force for clamping device Expired - Lifetime EP0509265B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4112547 1991-04-17
DE4112547A DE4112547A1 (en) 1991-04-17 1991-04-17 CLAMPING FORCE ADJUSTMENT FOR A CLAMPING DEVICE

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EP0509265A2 EP0509265A2 (en) 1992-10-21
EP0509265A3 EP0509265A3 (en) 1993-03-10
EP0509265B1 true EP0509265B1 (en) 1995-05-24

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EP (1) EP0509265B1 (en)
JP (1) JP3200144B2 (en)
KR (1) KR100226647B1 (en)
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DE (1) DE4112547A1 (en)

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JP4786348B2 (en) * 2006-01-16 2011-10-05 津田駒工業株式会社 Vise with booster
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KR100969350B1 (en) * 2010-01-12 2010-07-09 현성정밀 주식회사 A device for clamping post in floating platform
US8690138B2 (en) * 2010-12-29 2014-04-08 Tseh-Pei LIN Coaxial concentric double-jaw vice
US9630284B2 (en) * 2012-07-12 2017-04-25 Lincoln Global, Inc. Configurable welding table and force indicating clamp
CN102922450B (en) * 2012-11-15 2014-11-05 江苏科技大学 Clamping device for cylindrical surface test piece
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Publication number Publication date
DE4112547C2 (en) 1993-02-04
EP0509265A2 (en) 1992-10-21
JPH06262535A (en) 1994-09-20
KR920019487A (en) 1992-11-19
ATE122950T1 (en) 1995-06-15
KR100226647B1 (en) 1999-10-15
DE4112547A1 (en) 1992-10-22
US5192062A (en) 1993-03-09
JP3200144B2 (en) 2001-08-20
EP0509265A3 (en) 1993-03-10

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