EP0395889B1 - Clamping device for workpieces - Google Patents

Clamping device for workpieces Download PDF

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Publication number
EP0395889B1
EP0395889B1 EP90106198A EP90106198A EP0395889B1 EP 0395889 B1 EP0395889 B1 EP 0395889B1 EP 90106198 A EP90106198 A EP 90106198A EP 90106198 A EP90106198 A EP 90106198A EP 0395889 B1 EP0395889 B1 EP 0395889B1
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EP
European Patent Office
Prior art keywords
clamping
shaft
thread
rotary motor
coupling member
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
EP90106198A
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German (de)
French (fr)
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EP0395889A2 (en
EP0395889A3 (en
Inventor
Johann Szebold
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.)
Kontec Konstuktion and Technik Im Maschinenbau GmbH
Kontec GmbH
Original Assignee
Kontec Konstuktion and Technik Im Maschinenbau GmbH
Kontec GmbH
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Application filed by Kontec Konstuktion and Technik Im Maschinenbau GmbH, Kontec GmbH filed Critical Kontec Konstuktion and Technik Im Maschinenbau GmbH
Priority to AT90106198T priority Critical patent/ATE103226T1/en
Publication of EP0395889A2 publication Critical patent/EP0395889A2/en
Publication of EP0395889A3 publication Critical patent/EP0395889A3/en
Application granted granted Critical
Publication of EP0395889B1 publication Critical patent/EP0395889B1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00Clamps
    • B25B5/06Arrangements for positively actuating jaws
    • B25B5/061Arrangements for positively actuating jaws with fluid drive
    • B25B5/062Arrangements for positively actuating jaws with fluid drive with clamping means pivoting around an axis parallel to the pressing direction
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00Clamps
    • B25B5/06Arrangements for positively actuating jaws
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00Clamps
    • B25B5/06Arrangements for positively actuating jaws
    • B25B5/061Arrangements for positively actuating jaws with fluid drive

Definitions

  • the invention relates to a workpiece clamping device which can be actuated by a rotation motor which is reversible in the direction of rotation, comprising a shaft which can be driven by the rotation motor and is provided with a movement thread, which is rotatable in a guide housing and axially supported in an intermediate piece on roller bearings, and an actuating rod which is provided with an internal thread is secured against rotation and is connected to a tension arm or the like, and is in engagement with the actuating thread of the shaft for carrying out tensioning or loosening.
  • Swing clamps (DE-C-2 909 464 and DE-C-3 603 618) are also known, in which the clamping head or the clamping arm is arranged on an axially moving piston.
  • the piston carries out a stroke of a certain stroke length, which is composed of the swivel stroke and the clamping stroke.
  • the invention is based on the object of designing a device of the type mentioned at the outset such that, when higher clamping forces are transmitted, both clamping by swiveling and linear movement are possible.
  • the outside of the actuating rod is provided with an outer longitudinal groove, in which a guide and stop bolt, which can optionally be screwed in for a linear (axial) clamping operation, engages in the threaded bore of the internal thread of the actuating rod with an inner longitudinal groove is At the free end of the shaft, a stepped extension with a transverse bore is provided for a coupling device provided with a coupling member (13), the coupling member of which engages in the inner longitudinal groove and disengages from this longitudinal groove after striking the clamping arm on one of the stop pins in order to carry out a linear clamping movement Clamping of the workpiece.
  • the outside of the actuating rod is provided with an external longitudinal groove in which a guide and stop bolt, which can optionally be screwed into the guide housing for a linear (axial) clamping process, engages, the shaft is extended by means of a profile pin and is in engagement with a coupling member with a corresponding inner profile,
  • a compression spring is attached, whereby the coupling member is supported on a shoulder of the actuating rod with rotational friction and, after the clamping arm strikes one of the stop pins, overcomes the rotational friction for carrying out a linear clamping movement for clamping the workpiece.
  • An advantageous embodiment provides that a pneumatic motor is provided as the rotary motor, which drives the shaft via a reduction gear.
  • a driving pin arranged eccentrically on the output shaft of the rotary motor engages accordingly in a coaxial and non-rotatably connected flange disk and that this flange disk is supported on both sides on roller bearings designed as transverse bearings.
  • stop pins for the tensioning arm are provided on the end face of the guide housing.
  • a cover with circumferentially adjustable stop pins is attached to the threaded guide housing in order to achieve an arbitrary pivoting angle of the tensioning arm.
  • An advantageous embodiment provides that the shaft of the rotary motor and the guide housing are provided with a thread for screwing into a worktop.
  • the invention has the advantage that the clamping head or the clamping arm does not open after the drive mechanism has been switched off. This has particular advantages when the machine is switched off during breaks, which means that considerable energy savings can be achieved. Workpieces on pallets can also be prepared for later processing for series production. Furthermore, there is the advantage of a small, compact design and large clamping forces can be achieved compared to the known hydraulic clamping devices. Various mechanical connection options can also be implemented.
  • a conventional pneumatic rotary motor 1 which is reversible in its direction of rotation and which is fastened to an intermediate piece 2 serves as the drive.
  • the motor housing is provided with a thread 3, for example, and screwed into the intermediate piece 2.
  • the intermediate piece 2 is used to attach the device to a machine table.
  • the rotary motor 1 is provided with a reduction gear and a driver pin 4 engages in a flange disc 5.
  • the bearing is carried out with the help of roller bearings 6 and 7 in a guide housing 8 which is screwed onto the intermediate piece 2.
  • the driver pin 4 engages in the flange disk 5 off-center and moves about the central axis of this disk 5.
  • an actuating rod 11 is screwed onto this shaft 9 and can be displaced within the guide housing 8. Furthermore, the shaft 9 has a stepped extension 12 with a transverse bore 12 ', in which a coupling member 13 is arranged in the form of a pin with a coupling spring 14. This coupling member 13 engages in an axially extending inner longitudinal groove 15 on the inside of the actuating rod 11. Furthermore, the actuating rod 11 is provided in the middle with a lubrication bore 16 and a wiper 17 is also located between the guide housing 8 and the actuating rod 11.
  • an outer longitudinal groove 18 is provided on the outside of the actuating rod 11 and is engaged by a guide and stop bolt 19 which is screwed transversely into the guide housing 8.
  • a clamping arm 20 or other clamping head is attached at the end of the operating rod 11.
  • stop pins 21 are attached to the front of the housing.
  • the bolt 19 reaching into the outer longitudinal groove 18 is screwed in, the shaft 9 being driven so that the actuating rod 11 is displaced axially.
  • the displacement is limited by the length of the groove 18.
  • the device If the device is to work as a swing clamp, then the bolt 19 is removed so that the actuating rod 11 can perform a rotary movement. This is caused in that the coupling member 13 engages in the groove 15. This device also acts as overload protection, with the coupling member 13 being pushed back out of the groove 15 if the rotary movement for the actuating rod 11 is correspondingly inhibited.
  • the stop pins 21 serve both as an anti-twist device for the actuating rod 11 and as a limitation of the pivoting angle of the tensioning arm 20. If the tensioning arm 20 additionally executes a pivoting movement at a certain angle, which can be set as desired using the stop pins 21, the following function results. With the actuating rod 11 extended and after the bolt 19 has been removed, the rotary motor 1 is switched in such a way that the actuating rod 11 is retracted. Since the shaft 9 is connected to the actuating rod 11 by the coupling device 13, 14, and the shaft 9 performs a rotary movement, the tensioning arm 20 also carries out a corresponding rotary movement.
  • the motor 1 When relaxing, the motor 1 is driven in the opposite direction, ie the actuating rod 11 is extended so that the workpiece is released. If the frictional force between the clamping arm 20 and the workpiece is smaller than the coupling force of the coupling device 13, 14, the clamping arm 20 can pivot up to one of the stop pins 21. Thereafter, until the engine is switched off by the clutch device 13, 14 causes an axial movement in the direction of relaxation.
  • the shaft 9 is extended by a profile pin 12 ⁇ .
  • a coupling member 13' is placed with a corresponding inner profile and extended by means of a threaded pin 30 which is guided through a shoulder 29 of the actuating rod 11. If the device works as a linear clamp, then the stop pin 19 is screwed in and engages in the groove 18 (FIG. 3).
  • the actuating rod 11 is axially displaced by the driven shaft 9 with the thread 10.
  • a compression spring is inserted into the space 26 and the spring tension is adjusted by means of a nut 31.
  • the coupling member 13 ' is pressed against the shoulder 29.
  • the actuating rod 11 is taken along when the coupling member 13 is rotated by the friction on the shoulder 29. After striking the clamping arm 20 on one of the stop pins 21, this friction is overcome and the actuating rod 11 executes a linear clamping movement for clamping the workpiece.
  • Grooves 24 are provided on the guide housing 8 for attaching the cover 28 for holding the stop pins 21. Furthermore, a cover screw 25 is screwed onto the actuating rod 11.
  • the spring 14 ' advantageously it is disc springs, is against a disc 23. Threaded sections 22 are used to fasten the device to a worktop Guide housing 8 and the rotary motor 1 and also a screw-on fastening 27 in the middle of the device on the guide housing 8.

Abstract

The device serves for clamping workpieces with a clamping head, arranged on a piston rod 11, or a clamping arm 20. The drive 1 possesses, on the output side, a threaded bolt 9 on which the piston rod 11 is arranged. In addition, the piston rod 11 is provided with a guide housing 8 and a means 18, 19 for securing its rotation is situated between the piston rod 11 and the guide housing 8. A carrier 13, 15 is furthermore arranged between the threaded bolt 9 and the piston rod 11. <IMAGE>

Description

Die Erfindung betrifft eine Werkstückspannvorrichtung, die durch einen drehrichtungsumkehrbaren Rotationsmotor betätigbar ist, bestehend aus einem vom Rotationsmotor antreibbaren, mit einem Bewegungsgewinde versehenen Schaft, der in einem Führungsgehäuse drehbar und in einem Zwischenstück auf Wälzlagern axial abgestützt ist, einer mit einem Innengewinde versehenen Betätigungsstange, die gegen Verdrehung gesichert und mit einem Spannarm od. dgl. verbunden ist, sowie mit dem Betätigungsgewinde des Schaftes zum Ausführen des Spannens oder Lösens in Eingriff steht.The invention relates to a workpiece clamping device which can be actuated by a rotation motor which is reversible in the direction of rotation, comprising a shaft which can be driven by the rotation motor and is provided with a movement thread, which is rotatable in a guide housing and axially supported in an intermediate piece on roller bearings, and an actuating rod which is provided with an internal thread is secured against rotation and is connected to a tension arm or the like, and is in engagement with the actuating thread of the shaft for carrying out tensioning or loosening.

Bekannt ist (DE-C-3 638 526), eine von einem Elektromotor angetriebene Vorrichtung, die als linearer Spannzylinder arbeitet. Dabei ist am Ende des Spannzylinders ein Zwischenglied angeordnet, das mit dem Spannhebel gelenkig verbunden ist. Hierbei ist nachteilig, daß der Spannhebel zum Spannen nur eine Auf- und Abbewegung ausführt, so daß eine Anpassung an die Position der Werkstücke nicht gewährleistet ist. Am Ende des Spannvorganges muß der Antriebsmotor abgeschaltet werden. Außerdem sind bei dieser bekannten Spannvorrichtung zusätzliche Bauteile, wie eine axial verschiebbare Axialkupplung, eine Axialfeder für die Gewindespindel, eine bewegliche Axialgleitbüchse,Sicherheitsendschalter u.dgl. vorgesehen.It is known (DE-C-3 638 526), a device driven by an electric motor, which works as a linear clamping cylinder. In this case, an intermediate member is arranged at the end of the tensioning cylinder, which is articulated to the tensioning lever. The disadvantage here is that the clamping lever only performs an up and down movement for clamping, so that an adaptation to the position of the workpieces is not guaranteed. The drive motor must be switched off at the end of the tensioning process. In addition, additional components, such as an axially displaceable axial coupling, an axial spring for the threaded spindle, a movable axial sliding bush, safety limit switches and the like are in this known clamping device. intended.

Bekannt sind auch Schwenkspanner (DE-C-2 909 464 und DE-C-3 603 618), bei denen der Spannkopf bzw. der Spannarm an einem axial bewegten Kolben angeordnet ist. Der Kolben führt einen Hub von einer bestimmten Hublänge aus, der sich aus Schwenkhub und Spannhub zusammensetzt.Swing clamps (DE-C-2 909 464 and DE-C-3 603 618) are also known, in which the clamping head or the clamping arm is arranged on an axially moving piston. The piston carries out a stroke of a certain stroke length, which is composed of the swivel stroke and the clamping stroke.

Der Nachteil dieser bekannten Vorrichtungen besteht darin, daß beide Möglichkeiten, nämlich als Schwenkspanner oder als linearer Spannzylinder, nicht in einer Vorrichtung zusammengefaßt sind.The disadvantage of these known devices is that both options, namely as a swing clamp or as a linear clamping cylinder, are not combined in one device.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art so auszubilden, daß bei Übertragung höherer Spannkräfte sowohl ein Einspannen durch Schwenken, als auch durch eine lineare Bewegung möglich ist.The invention is based on the object of designing a device of the type mentioned at the outset such that, when higher clamping forces are transmitted, both clamping by swiveling and linear movement are possible.

Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß die Außenseite der Betätigungsstange mit einer Außenlängsnut versehen ist, in die ein im Führungsgehäuse wahlweise für einen linearen (axialen) Spannvorgang einschraubbarer Führungs- und Anschlagbolzen eingreift, die Gewindebohrung des Innengewindes der Betätigungsstange mit einer Innenlängsnut versehen ist,
am freien Ende des Schaftes eine abgesetzte Verlängerung mit einer Querbohrung für eine mit einem Kupplungsglied (13) versehene Kupplungseinrichtung vorgesehen ist, deren Kupplungsglied in die Innenlängsnut eingreift und nach dem Anschlagen des Spannarmes an einem der Anschlagstifte aus dieser Längsnut ausrastet zum Ausführen einer linearen Spannbewegung zum Spannen des Werkstückes.
This object is achieved according to the invention in that the outside of the actuating rod is provided with an outer longitudinal groove, in which a guide and stop bolt, which can optionally be screwed in for a linear (axial) clamping operation, engages in the threaded bore of the internal thread of the actuating rod with an inner longitudinal groove is
At the free end of the shaft, a stepped extension with a transverse bore is provided for a coupling device provided with a coupling member (13), the coupling member of which engages in the inner longitudinal groove and disengages from this longitudinal groove after striking the clamping arm on one of the stop pins in order to carry out a linear clamping movement Clamping of the workpiece.

Diese Aufgabe wird weiterhin dadurch gelöst, daß
   die Außenseite der Betätigungsstange mit einer Außenlängsnut versehen ist, in die ein im Führungsgehäuse wahlweise für einen linearen (axialen) Spannvorgang einschraubbarer Führungs- und Anschlagbolzen eingreift,
   der Schaft ist mittels eines Profilzapfens verlängert und steht im Eingriff mit einem Kupplungsglied mit entsprechendem Innenprofil,
   am Ende des Kupplungsgliedes ist eine Druckfeder angebracht, wodurch das Kupplungsglied an einer Schulter der Betätigungsstange unter Drehreibung abgestützt ist und nach dem Anschlagen des Spannarmes an einem der Anschlagstifte die Drehreibung zum Ausführen einer linearen Spannbewegung zum Spannen des Werkstückes überwindet.
This object is further achieved in that
the outside of the actuating rod is provided with an external longitudinal groove in which a guide and stop bolt, which can optionally be screwed into the guide housing for a linear (axial) clamping process, engages,
the shaft is extended by means of a profile pin and is in engagement with a coupling member with a corresponding inner profile,
At the end of the coupling member, a compression spring is attached, whereby the coupling member is supported on a shoulder of the actuating rod with rotational friction and, after the clamping arm strikes one of the stop pins, overcomes the rotational friction for carrying out a linear clamping movement for clamping the workpiece.

Eine vorteilhafte Ausführungsform sieht vor, daß als Rotationsmotor ein Pneumatikmotor vorgesehen ist, der über ein Untersetzungsgetriebe den Schaft antreibt.An advantageous embodiment provides that a pneumatic motor is provided as the rotary motor, which drives the shaft via a reduction gear.

Es ist vorteilhaft, daß ein exzentrisch auf der Abtriebswelle des Rotationsmotors angeordneter Mitnehmerstift entsprechend in eine gleichachsig und drehfest mit dem Schaft verbundene Flanschscheibe eingreift und daß diese Flanschscheibe beidseitig auf als Querlager ausgebildete Wälzlager abgestützt ist.It is advantageous that a driving pin arranged eccentrically on the output shaft of the rotary motor engages accordingly in a coaxial and non-rotatably connected flange disk and that this flange disk is supported on both sides on roller bearings designed as transverse bearings.

Weiterhin geht man so vor, daß an der Stirnseite des Führungsgehäuses Anschlagstifte für den Spannarm vorgesehen sind.Furthermore, one proceeds in such a way that stop pins for the tensioning arm are provided on the end face of the guide housing.

Hierbei ist es vorteilhaft, daß auf dem mit einem Gewinde versehenen Führungsgehäuse ein Deckel mit am Umfang verstellbaren Anschlagstiften angebracht ist, um einen beliebigen Schwenkwinkel des Spannarmes zu erzielen.It is advantageous here that a cover with circumferentially adjustable stop pins is attached to the threaded guide housing in order to achieve an arbitrary pivoting angle of the tensioning arm.

Eine vorteilhafte Ausführungsform sieht vor, daß der Schaft des Rotationsmotors und das Führungsgehäuse mit einem Gewinde zum Einschrauben in eine Arbeitsplatte vorgesehen sind.An advantageous embodiment provides that the shaft of the rotary motor and the guide housing are provided with a thread for screwing into a worktop.

Weiterhin ist es vorteilhaft, daß am Führungsgehäuse eine Aufschraubbefestigung für eine Arbeitsplatte vorgesehen ist.Furthermore, it is advantageous that a screw fastening for a worktop is provided on the guide housing.

Die Erfindung bringt den Vorteil, daß sich der Spannkopf bzw. der Spannarm nach dem Abstellen des Antriebsmechanismus nicht öffnet. Dies bringt insbesondere Vorteile beim Abstellen der Maschine in Pausen, wodurch eine erhebliche Energieersparnis erzielbar ist. Auch lassen sich für Serienproduktionen Werkstücke auf Paletten für die spätere Bearbeitung vorbereiten. Weiterhin ergibt sich der Vorteil einer kleinen, gedrängten Bauweise und es lassen sich große Spannkräfte gegenüber den bekannten Hydraulikspanneinrichtungen erzielen. Auch lassen sich die verschiedensten mechanischen Anschlußmöglichkeiten verwirklichen.The invention has the advantage that the clamping head or the clamping arm does not open after the drive mechanism has been switched off. This has particular advantages when the machine is switched off during breaks, which means that considerable energy savings can be achieved. Workpieces on pallets can also be prepared for later processing for series production. Furthermore, there is the advantage of a small, compact design and large clamping forces can be achieved compared to the known hydraulic clamping devices. Various mechanical connection options can also be implemented.

Die Erfindung wird in der nachfolgenden Beschreibung anhand von in den Zeichnungen dargestellten Ausführungsbeispielen näher erläutert.The invention is explained in more detail in the following description with reference to exemplary embodiments shown in the drawings.

Es zeigen,

Fig. 1
einen Längsschnitt durch die Vorrichtung,
Fig. 2
eine Ansicht in Pfeilrichtung A,
Fig. 3
einen Längsschnitt durch eine weitere Ausführungsform der Vorrichtung, wenn diese als Linearspanner arbeitet und
Fig. 4
diese Vorrichtung gemäß Fig. 3 teilweise geschnitten, wenn diese als Schwenkspanner arbeitet.
Show it,
Fig. 1
a longitudinal section through the device,
Fig. 2
a view in the direction of arrow A,
Fig. 3
a longitudinal section through a further embodiment of the device when it works as a linear tensioner and
Fig. 4
partially cut this device according to FIG. 3 when it works as a swing clamp.

Als Antrieb dient ein herkömmlicher pneumatischer, in seiner Drehrichtung umkehrbarer Rotationsmotor 1, der an einem Zwischenstück 2 befestigt ist. Dazu ist das Motorgehäuse beispielsweise mit einem Gewinde 3 versehen und in das Zwischenstück 2 eingeschraubt. Das Zwischenstück 2 dient zum Befestigen der Vorrichtung an einem Maschinentisch. Der Rotationsmotor 1 ist mit einem Untersetzungsgetriebe versehen und ein Mitnehmerstift 4 greift in eine Flanschscheibe 5 ein. Die Lagerung erfolgt mit Hilfe von Wälzlagern 6 bzw. 7 in einem Führungsgehäuse 8, das auf das Zwischenstück 2 aufgeschraubt ist. Wie aus Figur 1 ersichtlich, greift der Mitnehmerstift 4 außermittig in die Flanschscheibe 5 ein und bewegt sich um die zentrale Achse dieser Scheibe 5. An der Scheibe 5 ist mittig ein Schaft 9 befestigt, der außen mit einem Bewegungsgewinde 10 versehen ist. Auf diesem Schaft 9 ist eine Betätigungsstange 11 aufgeschraubt, die innerhalb des Führungsgehäuses 8 verschiebbar ist. Weiterhin besitzt der Schaft 9 eine abgesetzte Verlängerung 12 mit einer Querbohrung 12′, in der ein Kupplungsglied 13 in Form eines Stiftes mit einer Kupplungsfeder 14 angeordnet ist. Dieses Kupplungsglied 13 greift in eine sich axial erstreckende Innenlängsnut 15 an der Innenseite der Betätigungsstange 11 ein. Weiterhin ist die Betätigungsstange 11 in der Mitte mit einer Schmierbohrung 16 versehen und zwischen Führungsgehäuse 8 und Betätigungsstange 11 befindet sich weiterhin ein Abstreifer 17.A conventional pneumatic rotary motor 1 which is reversible in its direction of rotation and which is fastened to an intermediate piece 2 serves as the drive. For this purpose, the motor housing is provided with a thread 3, for example, and screwed into the intermediate piece 2. The intermediate piece 2 is used to attach the device to a machine table. The rotary motor 1 is provided with a reduction gear and a driver pin 4 engages in a flange disc 5. The bearing is carried out with the help of roller bearings 6 and 7 in a guide housing 8 which is screwed onto the intermediate piece 2. As can be seen from FIG. 1, the driver pin 4 engages in the flange disk 5 off-center and moves about the central axis of this disk 5. An actuating rod 11 is screwed onto this shaft 9 and can be displaced within the guide housing 8. Furthermore, the shaft 9 has a stepped extension 12 with a transverse bore 12 ', in which a coupling member 13 is arranged in the form of a pin with a coupling spring 14. This coupling member 13 engages in an axially extending inner longitudinal groove 15 on the inside of the actuating rod 11. Furthermore, the actuating rod 11 is provided in the middle with a lubrication bore 16 and a wiper 17 is also located between the guide housing 8 and the actuating rod 11.

Zur Hubbegrenzung ist an der Außenseite der Betätigungsstange 11 eine in axialer Richtung verlaufende Außenlängsnut 18 angebracht, in die ein in das Führungsgehäuse 8 quer eingeschraubter Führungs- und Anschlagbolzen 19 eingreift. Am Ende der Betätigungsstange 11 ist ein Spannarm 20 oder sonstiger Spannkopf befestigt. Zum Begrenzen der Schwenkbewegung des Spannarmes sind an der Stirnseite des Gehäuses 8 Anschlagstifte 21 angebracht.To limit the stroke, an outer longitudinal groove 18 is provided on the outside of the actuating rod 11 and is engaged by a guide and stop bolt 19 which is screwed transversely into the guide housing 8. At the end of the operating rod 11, a clamping arm 20 or other clamping head is attached. To limit the pivoting movement of the clamping arm 8 stop pins 21 are attached to the front of the housing.

Wenn die Vorichtung als linearer Spannzylinder arbeitet, ist der in die Außenlängsnut 18 reichende Bolzen 19 eingeschraubt, wobei der Schaft 9 angetrieben wird, so daß die Betätigungsstange 11 axial verschoben wird. Der Verschiebeweg ist durch die Länge der Nut 18 begrenzt.If the device works as a linear tensioning cylinder, the bolt 19 reaching into the outer longitudinal groove 18 is screwed in, the shaft 9 being driven so that the actuating rod 11 is displaced axially. The displacement is limited by the length of the groove 18.

Soll die Vorrichtung als Schwenkspanner arbeiten, dann wird der Bolzen 19 entfernt, so daß die Betätigungsstange 11 eine Drehbewegung ausführen kann. Dies wird dadurch bewirkt, daß das Kupplungsglied 13 in die Nut 15 einrastet. Diese Einrichtung wirkt gleichzeitig als Überlastschutz, wobei bei einer entsprechenden Hemmung der Drehbewegung für die Betätigungsstange 11 das Kupplungsglied 13 aus der Nut 15 zurückgedrückt wird.If the device is to work as a swing clamp, then the bolt 19 is removed so that the actuating rod 11 can perform a rotary movement. This is caused in that the coupling member 13 engages in the groove 15. This device also acts as overload protection, with the coupling member 13 being pushed back out of the groove 15 if the rotary movement for the actuating rod 11 is correspondingly inhibited.

Die Anschlagstifte 21 dienen sowohl als Verdrehsicherung der Betätigungsstange 11, als auch als Schwenkwinkelbegrenzung des Spannarmes 20. Wenn der Spannarm 20 zusätzlich eine Schwenkbewegung unter einem bestimmten Winkel, der beliebig anhand der Anschlagstifte 21 eingestellt werden kann, ausführt, ergibt sich folgende Funktion. Bei ausgefahrener Betätigungsstange 11 und nach dem Entfernen des Bolzens 19 wird der Rotationsmotor 1 derart geschaltet, daß die Betätigungsstange 11 eingefahren wird. Da der Schaft 9 mit der Betätigungsstange 11 durch die Kupplungseinrichtung 13,14 verbunden ist, und der Schaft 9 eine Drehbewegung ausführt, führt der Spannarm 20 ebenfalls eine entsprechende Drehbewegung aus. Die Schwenkbewegung des Spannarmes 20 wird von dem Anschlagstift 21 aufgehalten und die Rutschkupplung wird in Funktion gesetzt, wobei der Anschlagstift 21 die Funktion der Nut 18 und des Bolzens 19 übernimmt, so daß die Betätigungsstange 11 eine Axialbewegung gegen das Werkstück ausführt und dieses fest spannt.The stop pins 21 serve both as an anti-twist device for the actuating rod 11 and as a limitation of the pivoting angle of the tensioning arm 20. If the tensioning arm 20 additionally executes a pivoting movement at a certain angle, which can be set as desired using the stop pins 21, the following function results. With the actuating rod 11 extended and after the bolt 19 has been removed, the rotary motor 1 is switched in such a way that the actuating rod 11 is retracted. Since the shaft 9 is connected to the actuating rod 11 by the coupling device 13, 14, and the shaft 9 performs a rotary movement, the tensioning arm 20 also carries out a corresponding rotary movement. The pivoting movement of the clamping arm 20 is stopped by the stop pin 21 and the slip clutch is put into operation, the stop pin 21 taking over the function of the groove 18 and the bolt 19, so that the actuating rod 11 executes an axial movement against the workpiece and clamps it firmly.

Beim Entspannen wird der Motor 1 entgegengesetzt angetrieben, d.h. die Betätigungsstange 11 wird ausgefahren, so daß das Werkstück freigegeben wird. Wenn die Reibungskraft zwischen dem Spannarm 20 und dem Werkstück kleiner ist, als die Kupplungskraft der Kupplungseinrichtung 13,14, kann der Spannarm 20 bis an einen der Anschlagstifte 21 schwenken. Danach wird bis zum Abschalten des Motors durch die Kupplungseinrichtung 13,14 eine Axialbewegung in Richtung Entspannen bewirkt.When relaxing, the motor 1 is driven in the opposite direction, ie the actuating rod 11 is extended so that the workpiece is released. If the frictional force between the clamping arm 20 and the workpiece is smaller than the coupling force of the coupling device 13, 14, the clamping arm 20 can pivot up to one of the stop pins 21. Thereafter, until the engine is switched off by the clutch device 13, 14 causes an axial movement in the direction of relaxation.

Bei der Ausführungsform nach den Fig. 3 und 4 sind die gleichen Teile mit den gleichen Bezugszeichen versehen wie bei der Ausführungsform nach Fig. 1. In Abweichung von der Ausführungsform nach den Fig. 1 und 2 ist der Schaft 9 durch einen Profilzapfen 12˝ verlängert. Auf diesen Profilzapfen 12˝ ist ein Kupplungsglied 13′ mit einem entsprechenden Innenprofil aufgesetzt und mittels eines Gewindezapfens 30 verlängert, der durch eine Schulter 29 der Betätigungsstange 11 hindurchgeführt ist. Wenn die Vorrichtung als Linearspanner arbeitet, dann ist der Anschlagbolzen 19 eingeschraubt und greift hierbei in die Nut 18 ein (Fig. 3). Durch den angetriebenen Schaft 9 mit dem Gewinde 10 wird die Betätigungsstange 11 achsial verschoben.In the embodiment according to FIGS. 3 and 4, the same parts are provided with the same reference numerals as in the embodiment according to FIG. 1. In deviation from the embodiment according to FIGS. 1 and 2, the shaft 9 is extended by a profile pin 12˝ . On this profile pin 12 'a coupling member 13' is placed with a corresponding inner profile and extended by means of a threaded pin 30 which is guided through a shoulder 29 of the actuating rod 11. If the device works as a linear clamp, then the stop pin 19 is screwed in and engages in the groove 18 (FIG. 3). The actuating rod 11 is axially displaced by the driven shaft 9 with the thread 10.

Wenn die Vorrichtung nunmehr als Schwenkspanner arbeiten soll (Fig. 4), dann wird in den Raum 26 eine Druckfeder eingesetzt und die Federspannung mittels einer Mutter 31 eingestellt. Durch den Federdruck wird das Kupplungsglied 13′ gegen die Schulter 29 gedrückt. Sobald der Anschlagbolzen 19 aus der Nut 18 herausgeschraubt ist, wird bei einem Drehen des Kupplungsgliedes 13′ durch die Reibung an der Schulter 29 die Betätigungsstange 11 mitgenommen. Nach dem Anschlagen des Spannarmes 20 an einem der Anschlagstifte 21 wird diese Reibung überwunden und die Betätigungsstange 11 führt eine lineare Spannbewegung zum Spannen des Werkstückes aus.If the device is now to work as a swing clamp (FIG. 4), a compression spring is inserted into the space 26 and the spring tension is adjusted by means of a nut 31. By the spring pressure, the coupling member 13 'is pressed against the shoulder 29. As soon as the stop bolt 19 is unscrewed from the groove 18, the actuating rod 11 is taken along when the coupling member 13 is rotated by the friction on the shoulder 29. After striking the clamping arm 20 on one of the stop pins 21, this friction is overcome and the actuating rod 11 executes a linear clamping movement for clamping the workpiece.

Zum Anbringen des Deckels 28 für die Halterung der Anschlagstifte 21 sind an dem Führungsgehäuse 8 Nuten 24 vorgesehen. Weiterhin ist auf die Betätigungsstange 11 eine Abdeckschraube 25 aufgeschraubt. Die Feder 14′, vorteilhafterweise sind es Tellerfedern, liegt an einer Scheibe 23 an. Zum Befestigen der Vorrichtung an einer Arbeitsplatte dienen einmal Gewindeabschnitte 22 am Führungsgehäuse 8 sowie dem Rotationsmotor 1 und weiterhin eine Aufschraubbefestigung 27 in der Mitte der Vorrichtung am Führungsgehäuse 8.Grooves 24 are provided on the guide housing 8 for attaching the cover 28 for holding the stop pins 21. Furthermore, a cover screw 25 is screwed onto the actuating rod 11. The spring 14 ', advantageously it is disc springs, is against a disc 23. Threaded sections 22 are used to fasten the device to a worktop Guide housing 8 and the rotary motor 1 and also a screw-on fastening 27 in the middle of the device on the guide housing 8.

Claims (8)

  1. Workpiece clamping device which is operatable by a direction reversible rotary motor, consisting of
    1.1 a shafter (1) drivable by the rotary motor (1), provided with a movement thread (10), which shaft (9) is turnable in a guide casing (8) and is axially supported in an intermediate piece (2) on roller bearings (6,7),
    1.2 an operating rod (11) provided with an inside thread, which is secured against twisting and is connected with a clamping arm (20) and stands in engagement with the operating thread (10) of the shaft (9) for the execution of the tensioning or releasing, characterized in that
    1.3 the outside of the operation rod (11) is provided with an exterior longitudinal groove (18) into which there engages a guide and stop bolt (19) screwable in the guide casing (8) at will for a linear (axial) clamping process,
    1.4 the threaded bore of the inside thread of the operating rod (11) is provided with an inside longitudinal groove (15),
    1.5. at the free end of the shaft (9) there is provided an offset extension (12) with a transverse bore (12') for a coupling arrangement provided with a coupling member (13), the coupling member (13) of which engages into the internal longitudinal groove (15) and after the impact of the clamping arm (20) on one of the stop pins (21) disengages of this longitudinal groove for the execution of a linear clamping movement for the clamping of the workpiece.
  2. Workpiece clamping device which is operatable by a direction-reversible rotary motor, consisting of
    1.1 a shaft (9) drivable by the rotary motor (1), provided with a movement thread (10), which shaft (9) is turnable in a guide casing (8) and is axially supported in an intermediate piece (2) on roller bearings (6,7),
    1.2 an operating rod (11) provided with an inside thread, which is secured against twisting and is connected with a clamping arm (20) and stands in engagement with the operating thread (10) of the shaft (9) for the execution of the tensioning or loosening, characterized in that
    1.3 the outside of the operating rod (11) is provided with an exterior longitudinal groove (18) into which there engages a guide and stop bolt (19) screwable in the guide casing (8) at will for a linear (axial) clamping process,
    1.4 by means of profile lugs (12'') the shaft (9) is extended and stands in engagement with a coupling member (13') with corresponding inside profile,
    1.5 at the end of the coupling member (13') there is arranged a pressure spring (14'), whereby the coupling member (13') is supported on a shoulder (29) of the operating rod (11) under rotary friction and after the striking of the clamping arm (20) on one of the stop pins (21) overcomes the rotary friction for the execution of a linear clamping movement for the clamping of the workpiece.
  3. Device according to claim 1 or 2, characterized in that as rotary motor (1) there is provided a pneumatic motor which drives the shaft (9) over a reducing gear.
  4. Device according to claims 1 to 3, characterized in that a carrier pin (4) arranged eccentrically on the off-drive shaft of the rotary motor (1) engages into a coaxial flange disk (5) joined secure against turning with the shaft (9) and that this flange disk is supported on both sides on roller bearings (6,7) constructed as a transverse bearing.
  5. Device according to claim 1 or 2, characterized in that on the face side of the guide casing (8) there are provided stop pins (21) for the clamping arm (20).
  6. Device according to claim 5, characterized in that on the guiding case (8) provided with a thread (22) there is arranged a cover (28) with stop pins (21) adjustable on the circumference, in order to achieve an arbitrary swinging angle of the clamping arm (20).
  7. Device according to claim 1 to 6, characterized in that the shaft of the rotary motor (1) and the guide casing (8) are provided with a thread (22) for screwing into a work plate.
  8. Device according to claims 1 to 7, characterized in that on the guide casing (8) there is provided a screw-on fastening (27) for a work plate.
EP90106198A 1989-04-06 1990-03-30 Clamping device for workpieces Expired - Lifetime EP0395889B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90106198T ATE103226T1 (en) 1989-04-06 1990-03-30 WORKPIECE CLAMPING DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3911073 1989-04-06
DE3911073A DE3911073C1 (en) 1989-04-06 1989-04-06

Publications (3)

Publication Number Publication Date
EP0395889A2 EP0395889A2 (en) 1990-11-07
EP0395889A3 EP0395889A3 (en) 1992-03-04
EP0395889B1 true EP0395889B1 (en) 1994-03-23

Family

ID=6377957

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90106198A Expired - Lifetime EP0395889B1 (en) 1989-04-06 1990-03-30 Clamping device for workpieces

Country Status (4)

Country Link
EP (1) EP0395889B1 (en)
JP (1) JPH02292145A (en)
AT (1) ATE103226T1 (en)
DE (2) DE3911073C1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4430457C2 (en) * 1994-08-27 1998-03-12 Germa Armaturen Gmbh & Co Kg Arm
JP6962557B2 (en) * 2017-10-31 2021-11-05 株式会社コスメック Electric clamp device
CN109290828A (en) * 2018-11-27 2019-02-01 吉林东光奥威汽车制动系统有限公司 A kind of Master cylinder body clamp system with auxiliary locator
CN112008548A (en) * 2020-08-25 2020-12-01 田福来 Effectual grinding device of centre gripping

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4137784A (en) * 1977-11-14 1979-02-06 Industrial Device Corporation Electromechanical equivalent of fluid powered cylinder
DE2909464C2 (en) * 1979-03-10 1982-10-28 Fa. Andreas Maier, 7012 Fellbach Swing clamp, in particular for clamping a workpiece on a machine table of a machine tool
DE3215461A1 (en) * 1982-04-24 1983-11-03 Karlheinz 5800 Hagen Menkhoff Elastomer swivelling clamping cylinder with transmission unit
DE3334401A1 (en) * 1983-09-23 1985-04-04 A. Römheld GmbH & Co KG, 6312 Laubach Clamping and supporting unit for machine tools
DE3603618C1 (en) * 1986-02-06 1987-10-01 Friedhelm Hake Clamping device for use on machine tools
US4723767A (en) * 1986-08-08 1988-02-09 De-Sta-Co Division, Dover Resources, Inc. Rotary powered linear actuated clamp
US4700936A (en) * 1986-08-26 1987-10-20 Lamb Technicon Corp. Clamp mechanism
DE3638526C1 (en) * 1986-11-11 1987-07-30 Sta Co Mettallerzeugnisse Gmbh Workpiece clamping device that can be driven by an electric motor

Also Published As

Publication number Publication date
DE59005050D1 (en) 1994-04-28
EP0395889A2 (en) 1990-11-07
EP0395889A3 (en) 1992-03-04
ATE103226T1 (en) 1994-04-15
JPH02292145A (en) 1990-12-03
DE3911073C1 (en) 1990-07-26

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