EP2218548B1 - Liaison articulée destinée à transformer un mouvement linéaire en mouvement oscillatoire et dispositif de serrage doté d'une telle liaison articulée - Google Patents

Liaison articulée destinée à transformer un mouvement linéaire en mouvement oscillatoire et dispositif de serrage doté d'une telle liaison articulée Download PDF

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Publication number
EP2218548B1
EP2218548B1 EP20100153862 EP10153862A EP2218548B1 EP 2218548 B1 EP2218548 B1 EP 2218548B1 EP 20100153862 EP20100153862 EP 20100153862 EP 10153862 A EP10153862 A EP 10153862A EP 2218548 B1 EP2218548 B1 EP 2218548B1
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EP
European Patent Office
Prior art keywords
ball joint
joint head
clamping
groove
articulated link
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.)
Active
Application number
EP20100153862
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German (de)
English (en)
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EP2218548A2 (fr
EP2218548A3 (fr
Inventor
David Fischer
Rudolf Kohlert
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.)
Ludwig Ehrhardt GmbH
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Ludwig Ehrhardt 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.)
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Publication date
Application filed by Ludwig Ehrhardt GmbH filed Critical Ludwig Ehrhardt GmbH
Publication of EP2218548A2 publication Critical patent/EP2218548A2/fr
Publication of EP2218548A3 publication Critical patent/EP2218548A3/fr
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Publication of EP2218548B1 publication Critical patent/EP2218548B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/061—Arrangements for positively actuating jaws with fluid drive
    • B25B5/064—Arrangements for positively actuating jaws with fluid drive with clamping means pivoting around an axis perpendicular to the pressing direction
    • 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
    • B25B5/087—Arrangements for positively actuating jaws using cams actuated by a hydraulic or pneumatic piston

Definitions

  • the invention relates to a hinge connection for converting a linear movement into a pivoting movement with a linearly movable actuating element, with a ball joint arranged on the actuator ball joint head, wherein the ball joint head for at least partially transmitting the linear movement of the actuating element is connected to a rotary member with the rotary member. Furthermore, the invention relates to a clamping device for clamping workpieces on machines, devices and / or pallets with such a hinge connection.
  • Such a hinge connection and a corresponding clamping device are from the DE 43 07 058 known.
  • This is a clamping device with a clamping lever, which can be pivoted for inserting or removing a workpiece in a clamping range and expedischwenkbar out of this.
  • the hinge connection is designed such that the clamping lever is slidably mounted with its rotary joint in a sliding joint groove on a housing and the tilting movement of the clamping lever via a clamping piston.
  • the force of the clamping piston is transmitted to the clamping lever by means of a ball pin.
  • the disadvantage here is that the axis of rotation of the clamping lever is designed to be displaceable. As a result, only frictional forces can be transmitted to the housing in the case of forces acting transversely to the tensioning direction or main direction of action on the tensioning lever. In the case of forces acting transversely to the main direction of action, at least one force component acts in the longitudinal direction of the sliding joint groove. These forces acting in the longitudinal direction of the Schiebegelenknut not absorbed by the housing, but act on the clamping piston itself. This, however, there is a risk that the Functionality is impaired and / or the transferable clamping forces are reduced.
  • the axis of rotation of the sliding joint is exposed to high loads. Especially at high loads, the hinge axis can bend. Thus, there is a risk that the components are subject to increased wear with respect to the displaceable axis of rotation of the clamping lever, whereby the functionality may be at risk or there is an increased need for maintenance. Furthermore, such a hinge connection is insufficiently suitable for a space-saving construction of a clamping device.
  • the Schiebegelenknut weakens depending on their arrangement, the housing or the clamping lever, which can be forgiven, especially at high loads. Due to a bending of the axis of rotation and / or the housing or clamping lever, the maximum clamping force is limited to a workpiece, for example, in a clamping device.
  • the SU 1 202 786 A1 shows a chip device in which a clamping lever has a slot in which a fixed pin is arranged to guide the clamping lever.
  • the clamping lever is moved by means of a hinged to the clamping lever articulated rod for a sliding movement towards the workpiece and away from the workpiece along the slot or the pin.
  • the clamping takes place by means of a linearly movable actuating element.
  • DE 30 01 404 A1 is to take a clamping device in which a linearly movable actuating element is provided for applying the clamping force.
  • a further piston unit is provided, which cooperates with articulated rods.
  • the link rods are hingedly connected to a clamping lever and cause in addition to a pivoting movement a sliding movement of the clamping lever.
  • the assembly should be facilitated and reduced space requirements.
  • a large pivot angle must be able to pivot in order to move a clamping lever into and out of a clamping range.
  • a functionally reliable connection between the actuator and the clamping lever must be realized so that even under difficult environmental conditions, such as due to soiling such as shavings, coal and / or the like more reliable operation is guaranteed.
  • the number should the components are reduced, whereby the assembly costs and the manufacturing and assembly costs are reduced.
  • the problem underlying the invention is achieved in that the rotary member is rotatably mounted on a stationary rotary axis, wherein the bearing of the rotary member and the ball joint head is slidably guided in the rotary member.
  • the locally fixed axis of rotation is designed such that a corresponding stationary joint absorbs the loads acting on it, in particular from different directions. This is partly due to the lack of Slidability of the axis of rotation of the rotary element given a high reliability and on the other hand joints with small dimensions can be realized. As a result, in particular very compact clamping devices, for example, with a slender clevis for receiving or storage of a clamping lever produced.
  • a locally fixed axis of rotation can only be realized by virtue of the fact that the linear movement of the actuating element can be transferred to the rotary element by means of a ball joint head displaceable in the rotary element and converted into a pivoting movement in this case.
  • the ball joint head is displaceably connected to a sliding guide, in particular a strip, wherein the sliding guide is fixedly arranged on the rotary element.
  • rotating elements can be equipped or retrofitted by mounting a suitably designed bar in such a way that by means of the inclusion of the ball joint head in the bar a hinge connection according to the invention can be produced in a simple manner.
  • the ball joint head is guided displaceably in a groove of the rotary member.
  • the groove is arranged in particular on the side facing the actuating element of the rotary element.
  • the ball joint head is so in the groove of the rotary member, in particular due to suitable shoulders of the groove, added that a separate pin connection between the ball joint head and rotary member is avoided.
  • the ball joint head is at least partially enclosed by the groove for a secure hold in the direction of the linear movement, wherein an opening is provided for receiving and / or guiding a ball joint head neck in a region of the groove facing the actuating element.
  • the encompassing of the ball joint head takes place in particular by means of suitable shoulders of the groove. These shoulders are used to return the rotary element, for example, designed as a clamping lever rotary element out of the clamping area. Point contacts of the ball joint head with the shoulders are sufficient for a sufficient return force. Due to the point system of the ball joint head on the shoulders of the groove is ensured, for example, in a clamping device with the hinge connection according to the invention that the functionality, in particular due to an accumulation of dirt particles, such as chips, is not endangered.
  • the ball joint head is connected to the actuating element by means of the ball joint neck.
  • the aperture has a width which is less than the maximum diameter of the ball joint head and slightly wider than the diameter of the ball joint neck.
  • the ball joint head in a displaceable guide element, in particular rotatable added.
  • the sliding guide element can be designed as a pressure shell.
  • different groove cross-sections can be realized, wherein the ball joint head is displaceably guided in the rotary member or the groove of the rotary member by means of a correspondingly designed in accordance with the groove cross-section guide member.
  • the ball joint head in particular in the longitudinal direction of the groove, rotatably mounted in the guide element.
  • a large pivot angle for the rotary element can be achieved.
  • a rotatability of the ball joint head in the guide element transversely to the longitudinal direction of the groove can be dispensed with.
  • the axis of rotation is arranged with respect to its longitudinal axis at right angles to the longitudinal direction of the groove.
  • the rotary element can be arranged in a housing, in particular a clevis, in such a way that the rotary element can only be rotated at right angles to the axis of rotation in one plane.
  • the ball joint head according to an alternative embodiment also independently applicable as a joint head, in particular a pin joint, is formed, with only a rotational movement of the joint head perpendicular to the longitudinal direction of the axis of rotation can be realized.
  • a center of the ball joint head in particular due to the guide element, eccentrically displaced to a center of the groove and / or the guide element in the direction of the breakthrough.
  • the guide element is disposed within the groove and facing away from the opening.
  • the groove is formed in particular as a bore with a circular cylindrical cross-section.
  • the guide element is centrally centered in the longitudinal direction of the groove due to the inclusion of the ball joint head and a system of ball joint head on the groove in the region of the opening.
  • the guide element due to an abutment of the ball joint head at suitable shoulders of the groove in the region of the opening and the guide element remote from the opening and the groove formed in cross-section as a cylindrical bore is ensured by the eccentric arrangement of the ball joint head within the groove, that the guide element automatically centered centered in the longitudinal direction of the groove.
  • the center of the ball joint head is in a first end position of the rotary element on a support plane of the rotary element, wherein preferably a support point in the support plane is located on the side facing away from the ball joint head side of the axis of rotation.
  • a clamping device with a hinge connection according to the invention, a sufficient stroke of the actuating element can be realized.
  • a clamping device corresponds the support plane of a clamping plane in which a trained as a clamping lever rotary member rests in the first end position on a workpiece.
  • the axis of rotation of the rotary element is arranged with the support point of the rotary element on the transversely, in particular at right angles, aligned to the direction of the linear movement support plane.
  • the groove for a sufficient leverage in the first end position with an acute angle, preferably at an angle between 1 ° ° and 45 °, more preferably at an angle of 10 °, inclined to the support plane.
  • an intersection of the support plane with a thereto inclined center line of the groove and / or the guide element lies on the side remote from the ball joint head side of the axis of rotation.
  • An inclination angle of 10 ° has in practice in connection with clamping devices, especially with interchangeable clamping levers with different projections or Auskraginn, as a sufficient geometric means to cause a sufficient leverage effect on the support point of the clamping lever. Due to the lying on the support plane of the rotary element center of the ball joint head in the first end position of the rotary element, in particular during clamping in a tensioning device, at the center of the ball joint head at right angles to the linear movement of the actuating element aligned force component by the friction of the guide element in the groove in the direction of the axis of rotation , As a result, the guided guide element slidably guided in the groove would move in the direction of the axis of rotation of the rotary element and thus create one side of the ball joint head.
  • the actuating element would be loaded laterally unequal. Due to the inclined groove is now counteracted due to a wedge slope of the guide element displacing force. As a result, a one-sided load of the ball joint head and thus also of the actuating element is avoided.
  • the tensioning device has a housing and an actuating element designed as a tensioning piston for generating a linear movement and a ball joint arranged on the tensioning piston, the ball joint head for at least partially transmitting the linear movement of the Tensioning piston is connected to a trained as a clamping lever rotary member with the clamping lever, the clamping lever is rotatably mounted on a fixed rotational axis with the storage of the clamping lever is stationary and the clamping lever is arranged in the housing, that the clamping lever only in a plane perpendicular to the axis of rotation is rotatable and the ball joint head is guided displaceably in the tensioning lever.
  • the clamping lever is pivoted in a first end position, in particular for clamping a workpiece, in a clamping region and in a second end position, in particular for inserting or removing the workpiece, swung out of the clamping region.
  • a first end position in particular for clamping a workpiece
  • a second end position in particular for inserting or removing the workpiece, swung out of the clamping region.
  • the hinge connection according to the invention allows a compact design of the clamping device, wherein at the same time large clamping forces are transferable.
  • a simple assembly and / or easy replacement of the clamping lever can be realized, in particular a pin connection is avoided in the hinge connection.
  • Fig. 1 shows a clamping device 10 with a hinge connection 11 according to the invention in a side view.
  • a linear movement of an actuating element 17 is converted into a pivoting movement of a rotary element 20 about an axis of rotation 21.
  • the tensioning device 10 is to take a housing 12 having a main body 13 and a clevis 14.
  • a cylinder bore 15 is arranged, which receives a pressure piston 16.
  • the pressure piston 16 is formed in the embodiment shown here as a hydraulically operated pressure piston 16.
  • an actuating element 17 is arranged on the pressure piston 16.
  • the actuating element 17 is designed as a clamping piston 17.
  • At the side facing away from the pressure piston 16 side of the clamping piston 17 of the clamping piston 17 is in a ball joint neck 18 via. This ball joint neck 18 carries a ball joint head 19th
  • a rotary member 20 is mounted on the clevis 14.
  • the rotary member 20 is formed in the embodiment shown as a clamping lever 20.
  • the clamping lever 20 is rotatably mounted on a stationary, namely stationary, non-displaceable axis of rotation 21 by means of a hinge axis 22.
  • the ball joint head 19 On the ball joint head 19 side facing the clamping lever 20 of the ball joint head 19 is received in a guide member 23.
  • the ball joint head 19 is displaceably guided in a groove 24 by means of the guide element 23.
  • the groove 24 is formed as a continuous bore within the clamping lever 20. This ensures that the articulated connection 11 and thus the clamping device 10, for example, during a machining process, remains functional and the formation of a chip jam is largely avoided.
  • soiling are pushed out of the groove 24 at a displacement of the guide element 23, in particular in conjunction with Abstreifkanten 35 on the guide member 23. As a result, penetration of dirt particles into the guide element 23 is also sufficiently avoided.
  • the ball joint head 19 is, in particular together with the guide member 23, for establishing the hinge connection in a slot opening 36 of the groove 24 inserted.
  • the slot opening 36 is arranged at an end remote from the axis of rotation 21 of the groove 24.
  • the clamping device 10 can be seen on the one hand by means of the solid lines in a first end position and on the other hand by means of the dotted lines in a second end position.
  • the first end position of the pressure piston 16 is moved to the fork head 14 facing side of the cylinder bore 15.
  • the tensioning piston 17 is in its maximum extended position.
  • the clamping lever 20 is pivoted into a clamping region 25, so that a support point 26 is located in a support plane 27.
  • the first end position is the support point 26 of the clamping lever 20 on a workpiece, not shown.
  • the workpiece for example, on a machine table, clamped.
  • Fig. 2 shows a section of another clamping device 10 with a hinge connection 11 according to the invention.
  • the tensioning lever 20 is in the first end position.
  • the groove 24 is inclined with respect to its center line 28 by 10 ° to the support plane 27.
  • the center 29 of the ball joint head 19 on the one hand on the support plane 27 and on the other hand below the center line 28 of the groove 24 is arranged.
  • the center line 28 of the groove 24 intersects in a clamping point 25 facing the intersection point 30 with the support plane 27.
  • Fig. 3 shows a cross section of the clamping lever 20 according to Fig. 1 and 2 ,
  • the groove 24 is formed as a circular cylindrical bore.
  • At the ball joint head neck 18 side facing the groove 24 has an opening 32 for receiving and / or guiding the ball joint neck 18.
  • 32 shoulders 33 are formed in the region of the opening.
  • the ball joint head 19 is located on the shoulders 33 by means of a point support.
  • the guide element 23 is centered independently due to the eccentric position of the center 29 of the ball joint head 19 according to the arrow 34.
  • Fig. 4 shows the tensioning device 10 according to Fig. 2 in the second end position.
  • the tensioning piston 17 is completely retracted in the base body 13.
  • the guide element 23 is located at the end remote from the axis of rotation 21 of the groove 24.
  • the clamping lever 20 is completely pivoted out of the clamping region 25 in this second end position.
  • the articulation 11 between the clamping lever 20 and the ball joint head 19 thus enables a stationary, stable mounting of the clamping lever in a clevis 14.
  • compact clamping devices can be realized, which transmit sufficiently large clamping forces for clamping a workpiece.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Jigs For Machine Tools (AREA)
  • Transmission Devices (AREA)

Claims (12)

  1. Liaison articulée à convertir un mouvement linéaire en un mouvement pivotant, comprenant un organe actionneur (17) à mouvement linéaire, une tête à rotule (19) disposée audit organe actionneur (17), dans lequel ladite tête à rotule (19) est reliée à un organe rotatif (20) pour un transfert, au moins en partie, du mouvement linéaire dudit organe actionneur (17) audit organe rotatif (20), caractérisée e n ce que organe rotatif (20) est logé de manière rotative à un axe de révolution (21) stationnaire, au logement dudit organe rotatif (20) étant stationnaire et à ladite tête à rotule (19) étant guidée dans ledit organe rotatif (20) de manière déplaçable.
  2. Liaison articulée selon la revendication 1, caractérisée en ce que ladite tête à rotule (19) est guidée dans une rainure (24) dudit organe rotatif (20) de manière déplaçable.
  3. Liaison articulée selon la revendication 2, caractérisée en ce que ladite tête à rotule (19) est embrassée, au moins en partie, par ladite rainure (24) pour une retenue sûre de ladite tête à rotule (19) le long de la direction du mouvement linéaire, à un percement (32) étant formé dans une zone de ladite rainure (24), qui se trouve en face dudit organe actionneur (17), pour la réception et/ou le guidage d'un cou (18) de ladite tête à rotule, ce percement constituant des épaulements (33) à embrasser ladite tête à rotule (19).
  4. Liaison articulée selon une quelconque des revendications précédentes, caractérisée en ce que ladite tête à rotule (19) est reçue dans un élément de guidage (23), en particulier de façon qu'elle puisse tourner.
  5. Liaison articulée selon la revendication 3, caractérisée en ce qu'un centre (29) de ladite tête à rotule (19), est déplacé, de manière excentrique relativement à une ligne par le centre (28) de ladite rainure (24) ayant une coupe transversale cylindrique circulaire, en une direction vers ledit percement (32), en particulier en vertu d'un élément de guidage (23) selon la revendication 4.
  6. Liaison articulée selon une combinaison des revendications 1 à 4 ou 1 à 5, caractérisée en ce que ledit élément de guidage (23) est disposé à l'intérieur de ladite rainure (24) et en une position opposée audit percement (32).
  7. Liaison articulée selon la revendication 6, caractérisée en ce que ledit élément de guidage (23) est centrée en position centrale, le long de l'étendue longitudinale de ladite rainure (24), dans la zone dudit percement (32) en vertu de la réception de ladite tête à rotule (19) et de la position de ladite tête à rotule (19), qui repose contre ladite rainure (24).
  8. Liaison articulée selon une quelconque des revendications précédentes, caractérisée en ce qu'en une première position terminale d'un organe rotatif (20) configuré sous forme d'un levier tendeur, ledit centre (29) de ladite tête à rotule (19) se trouve sur un plan d'appui (27) dudit élément rotatif (27), à un point d'appui (26) dudit levier tendeur se trouvant dans ledit plan d'appui (27) du côté de l'axe de révolution (21), qui est opposé à ladite tête à rotule (19), et audit axe de révolution (21) dudit organe rotatif (20) conçu sous forme d'un levier tendeur avec ledit point d'appui (26) étant disposé sur ledit plan d'appui (27) à orientation en travers, en particulier à angle droit, relativement au sens du mouvement linéaire.
  9. Liaison articulée selon une combinaison des revendications 2 et 8, caractérisée en ce que ladite rainure (24) est inclinée à un angle aigu, de préférence à un angle entre 1° et 45°, de préférence particulière à un angle de 10°, relativement audit plan d'appui (27), pour un effet de levier suffisant dans la première position terminale.
  10. Liaison articulée selon la revendication 9, caractérisée en ce qu'un point d'intersection (30) entre ledit plan d'appui (27) et une ligne par le centre (28) de ladite rainure (24) ayant une coupe transversale cylindrique circulaire, qui est incliné relativement audit plan, se trouve du côté dudit axe de révolution (21), qui est opposé à ladite tête à rotule (19).
  11. Dispositif de serrage à serrer des pièces à usiner sur des machines, dispositifs et/ou palettes, comprenant une liaison articulée (11) à convertir un mouvement linéaire en un mouvement pivotant, selon une quelconque des revendications précédentes, comprenant une boîte et un organe actionneur (17) configuré sous forme d'un piston de serrage (17) afin d'engendre un mouvement linéaire, comprenant une tête à rotule (19) disposée audit piston de serrage (17), dans lequel ladite tête à rotule (19) est reliée à un organe rotatif (20) pour un transfert, au moins en partie, du mouvement linéaire dudit organe actionneur (17) audit organe rotatif (20), caractérisé en ce que ledit levier tendeur (20) est logé, de manière rotative, à un axe de révolution (21) stationnaire, ce logement dudit levier tendeur (20) étant stationnaire et audit levier tendeur (20) étant disposé dans ladite boîte, et en ce que ledit levier tendeur (20) n'est rotatif à angle droit relativement audit axe de révolution (21) qu'en un seul plan, et en ce que ladite tête à rotule (19) est guidé, de manière déplaçable, dans ledit levier tendeur (20).
  12. Utilisation d'un dispositif de serrage (10) selon la revendication 11 pour le serrage au cours de l'usinage et/ou de la production des pièces.
EP20100153862 2009-02-17 2010-02-17 Liaison articulée destinée à transformer un mouvement linéaire en mouvement oscillatoire et dispositif de serrage doté d'une telle liaison articulée Active EP2218548B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910009235 DE102009009235A1 (de) 2009-02-17 2009-02-17 Gelenkverbindung zum Umwandeln einer Linearbewegung in eine Schwenkbewegung und Spannvorrichtung mit einer solchen Gelenkverbindung

Publications (3)

Publication Number Publication Date
EP2218548A2 EP2218548A2 (fr) 2010-08-18
EP2218548A3 EP2218548A3 (fr) 2012-06-20
EP2218548B1 true EP2218548B1 (fr) 2014-05-28

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Application Number Title Priority Date Filing Date
EP20100153862 Active EP2218548B1 (fr) 2009-02-17 2010-02-17 Liaison articulée destinée à transformer un mouvement linéaire en mouvement oscillatoire et dispositif de serrage doté d'une telle liaison articulée

Country Status (2)

Country Link
EP (1) EP2218548B1 (fr)
DE (1) DE102009009235A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111958635B (zh) * 2020-08-18 2021-12-07 淮北创谷科技有限公司 一种张力反馈机器人关节连接机构

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281140A (en) * 1963-12-02 1966-10-25 Wilton Corp Sliding clamp
US3993296A (en) * 1975-06-30 1976-11-23 U.S. Amada, Ltd. Workpiece-handling apparatus
DE3001404A1 (de) * 1980-01-16 1982-08-19 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Vorrichtung zum aufspannen eines werkstueckes auf einen spanntisch
SU1202786A1 (ru) * 1984-08-01 1986-01-07 Предприятие П/Я Р-6930 Зажимное устройство
DE4307058A1 (de) 1993-03-06 1994-09-08 David Fischer Spannvorrichtung zum Spannen von Werkstücken auf Maschinentischen oder Paletten
DE202007001985U1 (de) * 2007-02-10 2007-04-05 Lenzkes, Karl-Heinz Spannvorrichtung

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DE102009009235A1 (de) 2010-08-19
EP2218548A2 (fr) 2010-08-18
EP2218548A3 (fr) 2012-06-20

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