EP4013570A1 - Clamping device - Google Patents

Clamping device

Info

Publication number
EP4013570A1
EP4013570A1 EP20767954.9A EP20767954A EP4013570A1 EP 4013570 A1 EP4013570 A1 EP 4013570A1 EP 20767954 A EP20767954 A EP 20767954A EP 4013570 A1 EP4013570 A1 EP 4013570A1
Authority
EP
European Patent Office
Prior art keywords
clamping device
spring element
abutment
housing
clamping
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.)
Granted
Application number
EP20767954.9A
Other languages
German (de)
French (fr)
Other versions
EP4013570B1 (en
Inventor
Markus RAMGE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DESTACO Europe GmbH
Original Assignee
DESTACO Europe GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DESTACO Europe GmbH filed Critical DESTACO Europe GmbH
Publication of EP4013570A1 publication Critical patent/EP4013570A1/en
Application granted granted Critical
Publication of EP4013570B1 publication Critical patent/EP4013570B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/02—Clamps with sliding jaws
    • 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
    • B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/08—Arrangements for positively actuating jaws using cams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/04—Clamps with pivoted jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws

Definitions

  • the invention relates to a clamping device according to the upper part of claim 1.
  • a clamping device of the type mentioned is known from the patent document DE 10 2016 200 180 A1.
  • This consists of a tensioning member movably mounted in a base body, a linearly movable actuator that is operatively connected to the tensioning member, a spring element that is operatively connected to the actuator and a rotatably mounted actuating element that is operatively connected to the spring element.
  • the spring element is designed as a tension spring (there reference number 24) because of the grooved plate (there reference number 15-19).
  • the invention is based on the object of improving a clamping device of the type mentioned at the beginning.
  • the operational safety of such a tensioning device should be improved in the event of a break in the spring element, which cannot be ruled out in principle.
  • the spring element is designed as a compression spring which can be compressed with the actuating element during tensioning.
  • the solution according to the invention is characterized in that a compression spring is used instead of the tension spring. This has far-reaching consequences and advantages - especially in connection with other training courses - which will be discussed in more detail below. 5
  • FIG. 1 shows in section the clamping device according to the invention in the open position
  • FIG. 2 shows, in section, the clamping device according to FIG. 1 on the way into the closed position
  • FIG. 3 shows, in section, the clamping device according to FIG. 1 in the closed position with a heavily loaded spring element
  • FIG. 4 shows, in section, the tensioning device according to FIG. 1 in the closed position with a lightly loaded spring element
  • FIG. 5 shows, in section from the side, the clamping device according to FIG. 4;
  • FIG. 6 shows, in perspective, the clamping device according to FIG. 1 30 in a first view in the closed position
  • FIG. 7 shows, in perspective, the clamping device according to FIG. 1 in a second view in the closed position
  • FIG. 8 in section, the loaded spring element according to FIG. 4 in a first side view
  • FIG. 9 shows in section the loaded spring element according to FIG. 4 5 in a second side view
  • FIG. 10 shows a side view of a housing section of the clamping device in which a latching mechanism is arranged
  • FIG. 11 shows the housing section receiving the locking mechanism 10 as a transparent representation
  • FIG. 12 shows the locking mechanism as an exploded view
  • FIG. 13 shows in section the housing section which receives a movement mechanism and the latching mechanism and on which the actuating element is arranged.
  • the clamping device shown in the figures consists in a known manner of a clamping member 2 movably mounted in a base body 1, a linearly movable actuator 3 operatively connected to the clamping member 2, a spring element 4 operatively connected to the actuator 3 and one to the spring element 4 Actively connected, rotatably mounted actuating element 5, see in particular FIG. 1.
  • the clamping member 2 is designed as 25 clamping hooks and a counter bearing 13 is provided on the base body 1 for this clamping hook. It is also preferred that a centering mandrel 16 is provided on the base body 1 and the clamping member 2 is arranged at least partially in this centering mandrel 16. 30th It is now essential for the tensioning device according to the invention that the spring element 4 is designed as a compression spring which can be compressed with the actuating element 5 during tensioning.
  • the tensioning member 2 is arranged pivotably and 5 displaceably in the base body 1. It is also preferred that a guide slot 14 is provided on the end of the tensioning member 2 on the actuator side and a pin 15 engaging in the guide slot 14 on the end of the actuator 3 on the tendon side.
  • a curved guide 17 is preferably provided on the clamping member 210 and a guide pin 18 engaging in the curved guide 17 is provided on the base body 1, see in particular FIG. 2 in this regard.
  • an abutment element 6 for the spring element 4 to be arranged on the end of the actuator 3 facing away from the clamping element 2.
  • the spring element 4 is preferably designed as a helical compression spring.
  • the abutment element 6 is preferably designed in the shape of a plate.
  • the actuator 3 is arranged centrally and the spring element 4 is arranged concentrically to the actuator 3 on the abutment element 6.
  • the spring element 4 is preferably designed to be supported on the one hand on the actuator 3 and on the other hand on an abutment 7 that is operatively connected to the actuating element 5.
  • the abutment 7 is arranged at one end of a preferably cup-shaped housing 8 and the actuating element 5 is operatively connected to the other end of the housing 8. It is also preferred that the abutment 7 is designed like a cover for the preferably cup-shaped housing 8, with a through hole 19 for the actuator 3 being provided on the cover. In addition, it is preferred that the The bearing element 6 for forming a damper is designed to be mounted in the housing 8 in the manner of a piston and / or that the housing 8 is designed to be displaceably mounted in the base body 1.
  • a channel 9 is arranged on the abutment element 6, which is otherwise sealed in the housing 8, see in particular Figure 8.
  • a check valve 10 is preferably arranged on the abutment element 6, which is otherwise sealed in the housing 8 apart from the channel 9 , see in particular FIG. 9.
  • both the channel 9 and the check valve 10 are preferably provided for the fluidic connection of two spaces 8.1, 8.2 arranged on both sides of the abutment element 6.
  • the housing 8, in particular the spaces 8.1, 8.2, is preferably filled 15 with a damping medium, preferably oil.
  • the channel 9 has dimensions that prevent rapid expansion of the spring element 4 and / or that the check valve 10 is permeable in the event of a movement of the abutment element 6 relative to the abutment 7 leading to compression of the spring element 4 and to an expansion in the event of a movement of the spring element 4 leading movement of the abutment element 6 relative to the abutment 7 is sealing.
  • a rotating shaft 11 rotatably mounted on the base body 1 is preferably provided for the rotatable mounting of the actuating element 5.
  • a lever arm 20 is arranged on the rotary shaft 11.
  • an intermediate member 21 is articulated on the lever arm 20.
  • the intermediate member 21 is preferably designed in an articulated manner 30 connected to the housing 8.
  • the rotating shaft 11, the The lever arm 20 and the intermediate member 21 preferably form a movement mechanism 23 (see FIG. 13).
  • the intermediate member 21 is U-shaped and encompasses the rotary shaft 11 in the clamping position. 5 Likewise, the intermediate member 21 is preferably designed as part of a toggle lever device.
  • a latching mechanism 12 holding the clamping device in the open position 10 is preferably provided on the rotary shaft 11 mounted in the housing section 1.1.
  • the locking mechanism 12 consists of a plate 12.1 attached to the base body 1 with a locking projection 12.2, a ball 12.3 cooperating with the locking projection 12.2, a bearing plate 12.4 for the ball 12.3, which is displaceably but non-rotatably connected to the rotary shaft 11, and a Ball 12.3 is formed against the plate 12.1 pressing spring device.
  • the spring device is formed from at least one plate spring 12.5, see in particular FIGS. 10 to 13.
  • at least one latching projection 12.2 and at least one ball 12.3 be provided.
  • two or particularly preferably even three latching projections 12.2 or balls 12.3 are provided distributed over the circumference.
  • an end position interrogation device 22 which interacts with the actuator 3 and preferably operates inductively, is preferably arranged on the base body 1.
  • the clamping device is in an open position (see Figure 1).
  • the clamping member 2 is arranged completely in the centering mandrel 16 and the lever arm 20 is in an upper or lateral position.
  • the clamping device is kept open, since the ball 12.3 of the locking mechanism 12 is blocked by the locking projection 12.2.
  • An undesired independent movement of the actuating element 5 and thus an adjustment of the intermediate member 21 is thus excluded.
  • the spring force exerted by the spring element 4 is greater when clamping thicker workpieces than with thinner ones, since the spring element 4 is compressed more strongly here (compare FIGS. 3 and 4).
  • the flexible compression of the spring element 4 allows (which is very advantageous) a certain tolerance equal to 30 in the thickness of the workpiece while still having sufficient clamping force for very thin workpieces.
  • Another advantage of the tensioning device according to the invention is that by using a compression spring as the spring element 4, with the same (high) tensioning force, a smaller installation space is required for the spring element than in comparable designs with a tension spring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Jigs For Machine Tools (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)

Abstract

The invention relates to a clamping device comprising a clamping member (2), which is movably mounted in a main body (1); a linearly movable actuator (3), which is operatively connected to the clamping member (2); a spring element (4), which is operatively connected to the actuator (3); and a rotatably mounted actuating element (5), which is operatively connected to the spring element (4). According to the invention, the spring element (4) is designed as a compression spring which can be compressed when tensioning by means of the actuating element (5).

Description

Spannvorrichtung Jig
Die Erfindung betrifft eine Spannvorrichtung gemäß dem Oberbe5 griff des Patentanspruchs 1. The invention relates to a clamping device according to the upper part of claim 1.
Eine Spannvorrichtung der eingangs genannten Art ist aus dem Patentdokument DE 10 2016 200 180 Al bekannt. Diese besteht aus einem beweglich in einem Grundkorpus gelagerten Spann10 glied, einem mit dem Spannglied wirkverbundenen, linear beweglichen Stellglied, einem mit dem Stellglied wirkverbundenen Federelement und einem mit dem Federelement wirkverbundenen, drehbar gelagerten Betätigungselement. Das Federelement ist bei dieser Lösung wegen der Nutenplatte (dort Bezugszeichen 15 19) als Zugfeder (dort Bezugszeichen 24) ausgebildet. A clamping device of the type mentioned is known from the patent document DE 10 2016 200 180 A1. This consists of a tensioning member movably mounted in a base body, a linearly movable actuator that is operatively connected to the tensioning member, a spring element that is operatively connected to the actuator and a rotatably mounted actuating element that is operatively connected to the spring element. In this solution, the spring element is designed as a tension spring (there reference number 24) because of the grooved plate (there reference number 15-19).
Der Erfindung liegt die Aufgabe zugrunde, eine Spannvorrichtung der eingangs genannten Art zu verbessern. Insbesondere soll die Betriebssicherheit einer solchen Spannvorrichtung bei 20 einem grundsätzlich nicht auszuschließenden Bruch des Federelements verbessert werden. The invention is based on the object of improving a clamping device of the type mentioned at the beginning. In particular, the operational safety of such a tensioning device should be improved in the event of a break in the spring element, which cannot be ruled out in principle.
Diese Aufgabe ist mit einer Spannvorrichtung der eingangs genannten Art durch die im Kennzeichen des Patentanspruchs 1 25 aufgeführten Merkmale gelöst. This object is achieved with a clamping device of the type mentioned at the outset by the features listed in the characterizing part of claim 1 25.
Nach der Erfindung ist also vorgesehen, dass das Federelement als beim Spannen mit dem Betätigungselement zusammendrückbare Druckfeder ausgebildet ist. 30 Mit anderen Worten zeichnet sich die erfindungsgemäße Lösung dadurch aus, dass statt der Zugfeder eine Druckfeder verwendet wird. Dies hat - insbesondere auch im Zusammenhang mit anderen Weiterbildungen - weitreichende Folgen und Vorteile, auf die weiter unten noch genauer eingegangen wird. 5 According to the invention, it is provided that the spring element is designed as a compression spring which can be compressed with the actuating element during tensioning. 30th In other words, the solution according to the invention is characterized in that a compression spring is used instead of the tension spring. This has far-reaching consequences and advantages - especially in connection with other training courses - which will be discussed in more detail below. 5
Andere vorteilhafte Weiterbildungen der erfindungsgemäßen Spannvorrichtung ergeben sich aus den abhängigen Patentansprüchen. Other advantageous developments of the clamping device according to the invention emerge from the dependent claims.
Die erfindungsgemäße Spannvorrichtung einschließlich ihrer vorteilhaften Weiterbildungen gemäß der abhängigen Patentansprüche wird nachfolgend anhand der zeichnerischen Darstellung eines bevorzugten Ausführungsbeispiels näher erläutert. The tensioning device according to the invention including its advantageous developments according to the dependent claims is explained in more detail below with reference to the drawing of a preferred embodiment.
Es zeigt It shows
Figur 1 im Schnitt die erfindungsgemäße Spannvorrichtung in geöffneter Stellung; FIG. 1 shows in section the clamping device according to the invention in the open position;
Figur 2 im Schnitt die Spannvorrichtung gemäß Figur 1 auf 20 dem Weg in Verschlussstellung; FIG. 2 shows, in section, the clamping device according to FIG. 1 on the way into the closed position;
Figur 3 im Schnitt die Spannvorrichtung gemäß Figur 1 in Verschlussstellung bei stark belastetem Federelement; FIG. 3 shows, in section, the clamping device according to FIG. 1 in the closed position with a heavily loaded spring element;
Figur 4 im Schnitt die Spannvorrichtung gemäß Figur 1 in 25 Verschlussstellung bei wenig belastetem Federelement; FIG. 4 shows, in section, the tensioning device according to FIG. 1 in the closed position with a lightly loaded spring element;
Figur 5 im Schnitt von der Seite die Spannvorrichtung gemäß Figur 4; FIG. 5 shows, in section from the side, the clamping device according to FIG. 4;
Figur 6 perspektivisch die Spannvorrichtung gemäß Figur 1 30 in einer ersten Ansicht in Verschlussstellung; Figur 7 perspektivisch die Spannvorrichtung gemäß Figur 1 in einer zweiten Ansicht in Verschlussstellung; FIG. 6 shows, in perspective, the clamping device according to FIG. 1 30 in a first view in the closed position; FIG. 7 shows, in perspective, the clamping device according to FIG. 1 in a second view in the closed position;
Figur 8 im Schnitt das belastete Federelement gemäß Figur 4 in einer ersten Seitenansicht; FIG. 8, in section, the loaded spring element according to FIG. 4 in a first side view;
Figur 9 im Schnitt das belastete Federelement gemäß Figur 4 5 in einer zweiten Seitenansicht; FIG. 9 shows in section the loaded spring element according to FIG. 4 5 in a second side view;
Figur 10 in Seitenansicht einen Gehäuseabschnitt der Spannvorrichtung, in dem ein Rastmechanismus angeordnet ist; FIG. 10 shows a side view of a housing section of the clamping device in which a latching mechanism is arranged;
Figur 11 als Transparentdarstellung den den Rastmechanismus 10 aufnehmenden Gehäuseabschnitt; FIG. 11 shows the housing section receiving the locking mechanism 10 as a transparent representation;
Figur 12 als Explosionsdarstellung den Rastmechanismus; und Figur 13 im Schnitt den einen Bewegungsmechanismus und den Rastmechanismus aufnehmenden Gehäuseabschnitt, an dem das Betätigungselement angeordnet ist. 15 FIG. 12 shows the locking mechanism as an exploded view; and FIG. 13 shows in section the housing section which receives a movement mechanism and the latching mechanism and on which the actuating element is arranged. 15th
Die in den Figuren dargestellte Spannvorrichtung besteht in bekannter Weise aus einem beweglich in einem Grundkorpus 1 gelagerten Spannglied 2, einem mit dem Spannglied 2 wirkverbundenen, linear beweglichen Stellglied 3, einem mit dem Stell- 20 glied 3 wirkverbundenen Federelement 4 und einem mit dem Federelement 4 wirkverbundenen, drehbar gelagerten Betätigungselement 5, siehe insbesondere Figur 1. The clamping device shown in the figures consists in a known manner of a clamping member 2 movably mounted in a base body 1, a linearly movable actuator 3 operatively connected to the clamping member 2, a spring element 4 operatively connected to the actuator 3 and one to the spring element 4 Actively connected, rotatably mounted actuating element 5, see in particular FIG. 1.
Dabei ist bevorzugt vorgesehen, dass das Spannglied 2 als 25 Spannhaken ausgebildet und am Grundkorpus 1 ein Gegenlager 13 für diesen Spannhaken vorgesehen ist. Weiterhin ist bevorzugt, dass am Grundkorpus 1 ein Zentrierdorn 16 vorgesehen und das Spannglied 2 mindestens teilweise in diesem Zentrierdorn 16 angeordnet ist. 30 Wesentlich für die erfindungsgemäße Spannvorrichtung ist nun, dass das Federelement 4 als beim Spannen mit dem Betätigungs- element 5 zusammendrückbare Druckfeder ausgebildet ist. It is preferably provided that the clamping member 2 is designed as 25 clamping hooks and a counter bearing 13 is provided on the base body 1 for this clamping hook. It is also preferred that a centering mandrel 16 is provided on the base body 1 and the clamping member 2 is arranged at least partially in this centering mandrel 16. 30th It is now essential for the tensioning device according to the invention that the spring element 4 is designed as a compression spring which can be compressed with the actuating element 5 during tensioning.
Zusätzlich ist bevorzugt, dass das Spannglied 2 schwenkbar und 5 verschieblich im Grundkorpus 1 gelagert angeordnet ist. Ebenso ist bevorzugt, dass am stellgliedseitigen Ende des Spannglieds 2 ein Führungsschlitz 14 und am spanngliedseitigen Ende des Stellglieds 3 ein in den Führungsschlitz 14 eingreifender Zapfen 15 vorgesehen ist. Zudem ist vorzugsweise am Spannglied 2 10 eine Kurvenführung 17 und am Grundkorpus 1 ein in die Kurvenführung 17 eingreifender Führungszapfen 18 vorgesehen, siehe hierzu insbesondere Figur 2. In addition, it is preferred that the tensioning member 2 is arranged pivotably and 5 displaceably in the base body 1. It is also preferred that a guide slot 14 is provided on the end of the tensioning member 2 on the actuator side and a pin 15 engaging in the guide slot 14 on the end of the actuator 3 on the tendon side. In addition, a curved guide 17 is preferably provided on the clamping member 210 and a guide pin 18 engaging in the curved guide 17 is provided on the base body 1, see in particular FIG. 2 in this regard.
Es ist außerdem vorzugsweise vorgesehen, dass am dem Spann15 glied 2 abgewandten Ende des Stellglieds 3 ein Widerlagerelement 6 für das Federelement 4 angeordnet ist. Dabei ist vorzugsweise das Federelement 4 als Schraubendruckfeder ausgebildet. Das Widerlagerelement 6 ist vorzugsweise tellerförmig ausgebildet. Zudem ist bevorzugt, dass das Stellglied 3 zen20 trisch und das Federelement 4 konzentrisch zum Stellglied 3 am Widerlagerelement 6 angeordnet ist. Wobei sich bevorzugterweise das Federelement 4 einerseits am Stellglied 3 und andererseits an einem mit dem Betätigungselement 5 wirkverbundenen Widerlager 7 abstützend ausgebildet ist. Weiterhin ist bevor25 zugt, dass das Widerlager 7 an einem Ende eines vorzugsweise topfförmigen Gehäuses 8 angeordnet und das Betätigungselement 5 mit dem anderen Ende des Gehäuses 8 wirkverbunden ausgebildet ist. Es ist außerdem bevorzugt, dass das Widerlager 7 wie ein Deckel für das vorzugsweise topfförmige Gehäuse 8 ausge30 bildet ist, wobei am Deckel ein Durchgangsloch 19 für das Stellglied 3 vorgesehen ist. Zudem ist bevorzugt, dass das Wi- derlagerelement 6 zur Ausbildung eines Dämpfers kolbenartig im Gehäuse 8 gelagert ausgebildet ist und/oder dass das Gehäuse 8 im Grundkorpus 1 verschieblich gelagert ausgebildet ist. Provision is also preferably made for an abutment element 6 for the spring element 4 to be arranged on the end of the actuator 3 facing away from the clamping element 2. The spring element 4 is preferably designed as a helical compression spring. The abutment element 6 is preferably designed in the shape of a plate. In addition, it is preferred that the actuator 3 is arranged centrally and the spring element 4 is arranged concentrically to the actuator 3 on the abutment element 6. The spring element 4 is preferably designed to be supported on the one hand on the actuator 3 and on the other hand on an abutment 7 that is operatively connected to the actuating element 5. Furthermore, it is preferred that the abutment 7 is arranged at one end of a preferably cup-shaped housing 8 and the actuating element 5 is operatively connected to the other end of the housing 8. It is also preferred that the abutment 7 is designed like a cover for the preferably cup-shaped housing 8, with a through hole 19 for the actuator 3 being provided on the cover. In addition, it is preferred that the The bearing element 6 for forming a damper is designed to be mounted in the housing 8 in the manner of a piston and / or that the housing 8 is designed to be displaceably mounted in the base body 1.
Des Weiteren ist bevorzugt, dass am im übrigen abgedichtet im 5 Gehäuse 8 geführten Widerlagerelement 6 ein Kanal 9 angeordnet ist, siehe hierzu insbesondere Figur 8. Zudem ist vorzugsweise am abgesehen vom Kanal 9 im übrigen abgedichtet im Gehäuse 8 geführten Widerlagerelement 6 ein Rückschlagventil 10 angeordnet, siehe hierzu insbesondere Figur 9. Zusätzlich sind vor10 zugsweise sowohl der Kanal 9 als auch das Rückschlagventil 10 jeweils zur fluidischen Verbindung zweier beidseitig des Widerlagerelements 6 angeordneter Räume 8.1, 8.2 vorgesehen. Dabei ist vorzugsweise das Gehäuse 8, insbesondere die Räume 8.1, 8.2 mit einem Dämpfungsmedium, vorzugsweise Öl, befüllt 15 ausgebildet. Hierbei ist bevorzugt, dass der Kanal 9 eine eine schnelle Expansion des Federelements 4 verhindernde Dimensionierung aufweist und/oder dass das Rückschlagventil 10 bei einer zu einer Kompression des Federelements 4 führenden Bewegung des Widerlagerelements 6 relativ zum Widerlager 7 durch20 lässig und bei einer zu einer Expansion des Federelements 4 führenden Bewegung des Widerlagerelements 6 relativ zum Widerlager 7 abdichtend ausgebildet ist. Furthermore, it is preferred that a channel 9 is arranged on the abutment element 6, which is otherwise sealed in the housing 8, see in particular Figure 8. In addition, a check valve 10 is preferably arranged on the abutment element 6, which is otherwise sealed in the housing 8 apart from the channel 9 , see in particular FIG. 9. In addition, both the channel 9 and the check valve 10 are preferably provided for the fluidic connection of two spaces 8.1, 8.2 arranged on both sides of the abutment element 6. The housing 8, in particular the spaces 8.1, 8.2, is preferably filled 15 with a damping medium, preferably oil. It is preferred here that the channel 9 has dimensions that prevent rapid expansion of the spring element 4 and / or that the check valve 10 is permeable in the event of a movement of the abutment element 6 relative to the abutment 7 leading to compression of the spring element 4 and to an expansion in the event of a movement of the spring element 4 leading movement of the abutment element 6 relative to the abutment 7 is sealing.
Weiterhin ist vorzugsweise zur drehbaren Lagerung des Betäti25 gungselements 5 eine drehbar am Grundkorpus 1 gelagerte Drehwelle 11 vorgesehen. Des Weiteren ist bevorzugt, dass an der Drehwelle 11 ein Hebelarm 20 angeordnet ist. Ebenso ist bevorzugt, dass am Hebelarm 20 gelenkig ein Zwischenglied 21 gelagert ist. Dabei ist vorzugsweise das Zwischenglied 21 gelenkig 30 mit dem Gehäuse 8 verbunden ausgebildet. Die Drehwelle 11, der Hebelarm 20 und das Zwischenglied 21 bilden dabei (siehe Figur 13) vorzugsweise einen Bewegungsmechanismus 23. Furthermore, a rotating shaft 11 rotatably mounted on the base body 1 is preferably provided for the rotatable mounting of the actuating element 5. It is also preferred that a lever arm 20 is arranged on the rotary shaft 11. It is also preferred that an intermediate member 21 is articulated on the lever arm 20. The intermediate member 21 is preferably designed in an articulated manner 30 connected to the housing 8. The rotating shaft 11, the The lever arm 20 and the intermediate member 21 preferably form a movement mechanism 23 (see FIG. 13).
Zudem ist bevorzugt, dass das Zwischenglied 21 u-förmig und in Spannstellung die Drehwelle 11 umschließend ausgebildet ist. 5 Ebenso ist vorzugsweise das Zwischenglied 21 als Teil einer Kniehebelvorrichtung ausgebildet. It is also preferred that the intermediate member 21 is U-shaped and encompasses the rotary shaft 11 in the clamping position. 5 Likewise, the intermediate member 21 is preferably designed as part of a toggle lever device.
Zudem ist vorzugsweise an der im Gehäuseabschnitt 1.1 gelagerten Drehwelle 11 ein die Spannvorrichtung in Öffnungsstellung 10 haltender Rastmechanismus 12 vorgesehen. Es ist dabei bevorzugt, dass der Rastmechanismus 12 aus einer am Grundkorpus 1 befestigten Platte 12.1 mit Rastvorsprung 12.2, einer mit dem Rastvorsprung 12.2 zusammenwirkenden Kugel 12.3, einer verschieblich, aber verdrehfest mit der Drehwelle 11 verbundenen 15 Lagerplatte 12.4 für die Kugel 12.3 und einer die Kugel 12.3 gegen die Platte 12.1 drückenden Federeinrichtung gebildet ist. Wobei weiterhin bevorzugt ist, dass die Federeinrichtung aus mindestens einer Tellerfeder 12.5 gebildet ist, siehe hierzu insbesondere die Figuren 10 bis 13. Wie sich für den 20 Fachmann aus den vorliegenden technischen Rahmenbedingungen ergibt, muss bei alledem mindestens ein Rastvorsprung 12.2 und mindestens eine Kugel 12.3 vorgesehen sein. Vorzugsweise sind aber jeweils zwei bzw. besonders bevorzugt sogar drei Rastvorsprünge 12.2 bzw. Kugeln 12.3 über den Umfang verteilt vorge25 sehen. In addition, a latching mechanism 12 holding the clamping device in the open position 10 is preferably provided on the rotary shaft 11 mounted in the housing section 1.1. It is preferred that the locking mechanism 12 consists of a plate 12.1 attached to the base body 1 with a locking projection 12.2, a ball 12.3 cooperating with the locking projection 12.2, a bearing plate 12.4 for the ball 12.3, which is displaceably but non-rotatably connected to the rotary shaft 11, and a Ball 12.3 is formed against the plate 12.1 pressing spring device. Whereby it is further preferred that the spring device is formed from at least one plate spring 12.5, see in particular FIGS. 10 to 13. As can be seen for a person skilled in the art from the present technical framework, at least one latching projection 12.2 and at least one ball 12.3 be provided. Preferably, however, two or particularly preferably even three latching projections 12.2 or balls 12.3 are provided distributed over the circumference.
Schließlich ist vorzugsweise am Grundkorpus 1 eine mit dem Stellglied 3 zusammenwirkende, vorzugsweise induktiv arbeitende Endstellungsabfrageeinrichtung 22 angeordnet. 30 Die erfindungsgemäße Spannvorrichtung gemäß dem in den Figuren dargestellten Ausführungsbeispiel funktioniert wie folgt: Finally, an end position interrogation device 22, which interacts with the actuator 3 and preferably operates inductively, is preferably arranged on the base body 1. 30th The clamping device according to the invention according to the embodiment shown in the figures works as follows:
Zunächst befindet sich die Spannvorrichtung in einer offenen Position (siehe Figur 1). Das Spannglied 2 ist vollständig im 5 Zentrierdorn 16 angeordnet und der Hebelarm 20 befindet sich in einer oberen bzw. seitlichen Stellung. In diesem Zustand wird die Spannvorrichtung offen gehalten, da die Kugel 12.3 des Rastmechanismus 12 vom Rastvorsprung 12.2 blockiert wird. Damit ist eine unerwünschte selbstständige Bewegung des Betä10 tigungselements 5 und damit eine Verstellung des Zwischenglieds 21 ausgeschlossen. Initially, the clamping device is in an open position (see Figure 1). The clamping member 2 is arranged completely in the centering mandrel 16 and the lever arm 20 is in an upper or lateral position. In this state, the clamping device is kept open, since the ball 12.3 of the locking mechanism 12 is blocked by the locking projection 12.2. An undesired independent movement of the actuating element 5 and thus an adjustment of the intermediate member 21 is thus excluded.
Um die Spannvorrichtung in die Spannstellung zu bringen, wird nun der Hebelarm 20 mit Hilfe des Betätigungselements 5 nach 15 unten gedreht und somit die Kugel 12.3 entgegen dem Widerstand des Rastvorsprungs 12.2 an diesem vorbei bewegt. Dies hat zur Folge, dass das Gehäuse 8 im Grundkorpus 1 mit Hilfe des Zwischengliedes 21 nach unten gezogen wird, wobei das Stellglied 3 mit nach unten bewegt wird. Die Abwärtsbewegung des Stell20 glieds 3 bewirkt nun über die Kopplung des Stellglieds 3 mit dem Spannglied 2 über den Führungsschlitz 14 und den Zapfen 15 ebenfalls eine Abwärtsbewegung des Spannglieds 2, welche gleichzeitig mit einer Schwenkbewegung des Spannglieds 2, bedingt durch den Lauf des Führungszapfens 18 in der Kurven25 führung 17, stattfindet. Die Überlagerung dieser beiden Bewegungen bewirkt nun, dass das Spannglied 2 aus dem Zentrierdorn 16 heraustritt, sich in Richtung des Gegenlagers 13 bewegt und dabei ein dort aufgelegtes Werkstück festspannt. Da der Hebelarm 20 und das Zwischenglied 21 als Teil einer Kniehebelvor30 richtung (Bewegungsmechanismus 23) ausgebildet sind und sich deren Kniehebel in Spannstellung der Spannvorrichtung in einer Übertotpunktposition befindet, ist sichergestellt, dass sich die Spannstellung nicht von alleine lösen kann. Dies ermöglicht, gemeinsam mit dem zuvor erwähnten Rastmechanismus 12, einen besonders sicheren Betrieb der Spannvorrichtung. In order to bring the clamping device into the clamping position, the lever arm 20 is now rotated downwards with the aid of the actuating element 5 and thus the ball 12.3 moves past the locking projection 12.2 against the resistance thereof. This has the consequence that the housing 8 in the base body 1 is pulled downwards with the aid of the intermediate member 21, the actuator 3 being moved downwards with it. The downward movement of the actuator 3 now causes, via the coupling of the actuator 3 to the clamping element 2 via the guide slot 14 and the pin 15, also a downward movement of the clamping element 2, which simultaneously with a pivoting movement of the clamping element 2, caused by the running of the guide pin 18 in the curve 25 guide 17 takes place. The superposition of these two movements now has the effect that the clamping member 2 emerges from the centering mandrel 16, moves in the direction of the counter bearing 13 and in the process clamps a workpiece placed there. Since the lever arm 20 and the intermediate member 21 are designed as part of a toggle lever device (movement mechanism 23) and their toggle levers are in the clamping position of the clamping device in a Is located above dead center, it is ensured that the clamping position cannot come loose by itself. This, together with the aforementioned locking mechanism 12, enables particularly safe operation of the clamping device.
55
Erreicht das Spannglied 2 das Werkstück, so kann es nicht weiter nach unten gezogen werden. Gleiches gilt dann auch für das mit dem Spannglied 2 verbundenen Stellglied 3 und das mit diesem verbundene Widerlagerelement 6. Das Gehäuse 8 mit dem Widerlager 7 kann allerdings, bei Bewegung des Hebelarms 20, 10 noch ein Stück weiter abgesenkt werden. Da das Federelement 4 zwischen dem Widerlagerelement 6 und dem Widerlager 7 positioniert ist, bewirkt dies, dass das Federelement 4 komprimiert wird (vergleiche Figuren 2 und 3). Die hierdurch entstehende Federkraft wirkt einem unerwünschten Öffnen der Spannvorrich15 tung entgegen und bedingt so eine höhere Betriebssicherheit der Spannvorrichtung. Zudem ist so sichergestellt, dass selbst bei einem Bruch des Federelements 4 die Spannstellung gewahrt bleibt. Weiterhin wirkt sich die zuvor beschriebene Befüllung der Räume 8.1 und 8.2 des Gehäuses 8 mit einem Dämpfungsmedium 20 sicherheitsförderlich aus, da hierdurch abrupte Bewegungen des Stellglieds 3 bzw. insbesondere des außen an der Spannvorrichtung angeordneten Betätigungselements 5 abgeschwächt bzw. verhindert werden. If the tendon 2 reaches the workpiece, it cannot be pulled down any further. The same then also applies to the actuator 3 connected to the tensioning member 2 and the abutment element 6 connected to it. The housing 8 with the abutment 7 can, however, be lowered a little further when the lever arm 20, 10 is moved. Since the spring element 4 is positioned between the abutment element 6 and the abutment 7, this has the effect that the spring element 4 is compressed (compare FIGS. 2 and 3). The resulting spring force counteracts an undesired opening of the clamping device and thus makes the clamping device more reliable. This also ensures that the tensioned position is maintained even if the spring element 4 breaks. Furthermore, the previously described filling of the spaces 8.1 and 8.2 of the housing 8 with a damping medium 20 has a safety-promoting effect, since this weakens or prevents abrupt movements of the actuator 3 or, in particular, of the actuating element 5 arranged on the outside of the clamping device.
2525th
Die vom Federelement 4 ausgeübte Federkraft ist beim Spannen dickerer Werkstücke größer als bei dünneren, da hier das Federelement 4 stärker komprimiert wird (vergleiche Figuren 3 und 4). Das flexible Komprimieren des Federelements 4 erlaubt dabei (was sehr vorteilhaft ist) einen gewissen Toleranzaus30 gleich in der Dicke des Werkstücks bei immer noch ausreichender Spannkraft bei sehr dünnen Werkstücken. Ein weiterer Vorteil der erfindungsgemäßen Spannvorrichtung besteht darin, dass durch Verwendung einer Druckfeder als Federelement 4 bei gleicher (hoher) Spannkraft ein kleinerer Bauraum für das Federelement benötigt wird als bei vergleich- 5 baren Konstruktionen mit einer Zugfeder. The spring force exerted by the spring element 4 is greater when clamping thicker workpieces than with thinner ones, since the spring element 4 is compressed more strongly here (compare FIGS. 3 and 4). The flexible compression of the spring element 4 allows (which is very advantageous) a certain tolerance equal to 30 in the thickness of the workpiece while still having sufficient clamping force for very thin workpieces. Another advantage of the tensioning device according to the invention is that by using a compression spring as the spring element 4, with the same (high) tensioning force, a smaller installation space is required for the spring element than in comparable designs with a tension spring.
Bezugszeichenliste List of reference symbols
1 Grundkorpus 1 basic body
1.1 Gehäuseabschnitt1.1 Housing section
2 Spannglied 2 tendons
3 Stellglied 3 actuator
4 Federelement 4 spring element
5 Betätigungselement5 actuator
6 Widerlagerelement6 abutment element
7 Widerlager 7 abutments
8 Gehäuse 8 housing
8.1 Raum 8.1 space
8.2 Raum 8.2 space
9 Kanal 9 channel
10 Rückschlagventil10 check valve
11 Drehwelle 11 rotating shaft
12 Rastmechanismus12 locking mechanism
12.1 Platte 12.1 plate
12.2 Rastvorsprung12.2 locking projection
12.3 Kugel 12.3 bullet
12.4 Lagerplatte 12.4 bearing plate
12.5 Tellerfeder 12.5 disc spring
13 Gegenlager 13 counter bearings
14 Führungsschlitz14 guide slot
15 Zapfen 15 tenons
16 Zentrierdorn 16 centering pin
17 Kurvenführung 17 cornering
18 Führungszapfen 18 guide pins
19 Durchgangsloch Hebelarm Zwischenglied Abfrageeinrichtung Bewegungsmechanismus 19 through hole Lever arm intermediate link interrogation device movement mechanism

Claims

Patentansprüche Claims
1. Spannvorrichtung, umfassend ein beweglich in einem Grundkorpus (1) gelagertes Spannglied (2), ein mit dem Spannglied (2) wirkverbundenes, linear bewegliches Stellglied (3), ein mit dem Stellglied (3) wirkverbundenes Federelement (4) und ein mit dem Federelement (4) wirkverbundenes, drehbar gelagertes Betätigungselement (5), dadurch gekennzeichnet, dass das Federelement (4) als beim Spannen mit dem Betätigungselement (5) zusammendrückbare Druckfeder ausgebildet ist. 1. Clamping device, comprising a movable clamping member (2) mounted in a base body (1), a linearly movable actuator (3) operatively connected to the clamping member (2), a spring element (4) operatively connected to the actuator (3) and a spring element (4) the spring element (4) operatively connected, rotatably mounted actuating element (5), characterized in that the spring element (4) is designed as a compression spring compressible with the actuating element (5) during tensioning.
2. Spannvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass am Spannglied (2) abgewandten Ende des Stellglieds (3) ein Widerlagerelement (6) für das Federelement (4) angeordnet ist. 2. Clamping device according to claim 1, characterized in that an abutment element (6) for the spring element (4) is arranged on the clamping element (2) facing away from the end of the actuator (3).
3. Spannvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass sich das Federelement (4) einerseits am Stellglied (3) und andererseits an einem mit dem Betätigungselement (5) wirkverbundenen Widerlager (7) abstützend ausgebildet ist. 3. Clamping device according to claim 1 or 2, characterized in that the spring element (4) is supported on the one hand on the actuator (3) and on the other hand on an abutment (7) operatively connected to the actuating element (5).
4. Spannvorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass das Widerlager (7) an einem Ende eines Gehäuses (8) angeordnet und das Betätigungselement (5) mit dem anderen Ende des Gehäuses (8) wirkverbunden ausgebildet ist. 4. Clamping device according to claim 3, characterized in that the abutment (7) is arranged at one end of a housing (8) and the actuating element (5) is operatively connected to the other end of the housing (8).
5. Spannvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass das Widerlagerelement (6) zur Ausbildung eines Dämpfers kolbenartig im Gehäuse (8) gelagert ausgebildet ist. 5. Clamping device according to claim 4, characterized in that the abutment element (6) is designed to form a damper in the manner of a piston in the housing (8).
6. Spannvorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass das Gehäuse (8) im Grundkorpus (1) verschieblich gelagert ausgebildet ist. 6. Clamping device according to claim 4 or 5, characterized in that the housing (8) is designed to be displaceably mounted in the base body (1).
7. Spannvorrichtung nach 5 oder 6, dadurch gekennzeichnet, dass am im übrigen abgedichtet im Gehäuse (8) geführten Widerlagerelement (6) ein Kanal (9) angeordnet ist. 7. Clamping device according to 5 or 6, characterized in that a channel (9) is arranged on the abutment element (6) which is otherwise sealed in the housing (8).
8. Spannvorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass am abgesehen vom Kanal (9) im übrigen abgedichtet im Gehäuse (8) geführten Widerlagerelement (6) ein Rückschlagventil (10) angeordnet ist. 8. Clamping device according to claim 7, characterized in that, apart from the channel (9), a check valve (10) is arranged on the abutment element (6) guided in a sealed manner in the housing (8).
9. Spannvorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass das Rückschlagventil (10) bei einer zu einer Kompression des Federelements (4) führenden Bewegung des Widerlagerelements (6) durchlässig und bei einer zu einer Expansion des Federelements (4) führenden Bewegung des Widerlagerelements (6) abdichtend ausgebildet ist. 9. Clamping device according to claim 8, characterized in that the check valve (10) is permeable in the event of a movement of the abutment element (6) leading to a compression of the spring element (4) and in a movement of the abutment element (4) leading to an expansion of the spring element (4) 6) is designed to be sealing.
10. Spannvorrichtung nach einem der Ansprüche 1 bis 9, wobei zur drehbaren Lagerung des Betätigungselements (5) eine drehbar am Grundkorpus (1) gelagerte Drehwelle (11) vorgesehen ist, dadurch gekennzeichnet, dass an der Drehwelle (11) ein die Spannvorrichtung in Öffnungsstellung haltender Rastmechanismus (12) vorgesehen ist. 10. Clamping device according to one of claims 1 to 9, wherein for the rotatable mounting of the actuating element (5) a rotatably mounted on the base body (1) rotating shaft (11) is provided, characterized in that the clamping device is in the open position on the rotating shaft (11) holding latching mechanism (12) is provided.
EP20767954.9A 2019-08-14 2020-08-05 Clamping device Active EP4013570B1 (en)

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DE102019121860.8A DE102019121860A1 (en) 2019-08-14 2019-08-14 Jig
PCT/DE2020/100690 WO2021027993A1 (en) 2019-08-14 2020-08-05 Clamping device

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JP (1) JP2022544158A (en)
CN (1) CN114401824B (en)
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CN117464711B (en) * 2023-12-27 2024-03-29 苏州希瑞格机器人科技有限公司 Pneumatic clamping finger

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WO2021027993A1 (en) 2021-02-18
US20220379438A1 (en) 2022-12-01
CN114401824B (en) 2024-04-02
US11850713B2 (en) 2023-12-26
DE102019121860A1 (en) 2021-02-18
JP2022544158A (en) 2022-10-17
EP4013570B1 (en) 2024-10-23

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