EP2242619B1 - Élément de serrage - Google Patents

Élément de serrage Download PDF

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Publication number
EP2242619B1
EP2242619B1 EP09700751.2A EP09700751A EP2242619B1 EP 2242619 B1 EP2242619 B1 EP 2242619B1 EP 09700751 A EP09700751 A EP 09700751A EP 2242619 B1 EP2242619 B1 EP 2242619B1
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EP
European Patent Office
Prior art keywords
clamping
piston
contact surface
section
lever
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.)
Not-in-force
Application number
EP09700751.2A
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German (de)
English (en)
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EP2242619A1 (fr
Inventor
Matthias Fischer
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.)
VEL VEGA - DESIGN E TECNOLOGIA IND. UNIP. LDA.
Original Assignee
Vel Vega - Design e Tecnologia Ind Unip Lda
VEL VEGA DESIGN E TECNOLOGIA IND UNIP Lda
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Publication date
Application filed by Vel Vega - Design e Tecnologia Ind Unip Lda, VEL VEGA DESIGN E TECNOLOGIA IND UNIP Lda filed Critical Vel Vega - Design e Tecnologia Ind Unip Lda
Publication of EP2242619A1 publication Critical patent/EP2242619A1/fr
Application granted granted Critical
Publication of EP2242619B1 publication Critical patent/EP2242619B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • the invention relates to a clamping element for fixing a workpiece according to the preamble of claim 1.
  • a clamping element is for example from the DE 37 36 421 C1 known.
  • the clamping lever is only indirectly connected to the housing by means of two tab elements acting as compensating means.
  • the two tab elements are each pivotally mounted on the clamping lever and the housing, so that the pivot axis about which the clamping lever is directly pivotable, not fixed relative to the housing is provided.
  • clamping lever has only a low stability against lateral forces in the direction of the pivot axes of the tab elements.
  • the object of the invention is to develop a generic clamping element to the effect that the disadvantages of the prior art are prevented or reduced.
  • the piston has a contact surface on which slides at a common clamping movement of the clamping lever with the piston corresponding to the contact surface of the piston contact surface of the clamping lever along, wherein the contact surfaces always in a common clamping movement of the clamping lever with the piston at least partially in surface contact with each other.
  • the stationary housing in operation is provided in particular for fixing to a clamping surface of a clamping device on which the workpiece can be fixed.
  • the local strength of the housing refers to the fact that relative to the clamping surface no relative movement of the housing is provided during operation. However, this does not preclude movement of the tensioner in its entirety.
  • the clamping lever according to the invention is mounted directly, so that the main pivot axis has both relative to the clamping lever and relative to the housing has a fixed position. This immediate pivoting of the clamping lever relative to the housing makes it possible to achieve a particularly high stability of the clamping lever, in particular with regard to lateral forces, ie forces which have a directional component parallel to the main pivot axis.
  • the required length compensation which is required because the clamping lever describes a circular path around the main pivot axis and the piston describes a line path, is achieved in that the piston and the clamping lever are coordinated so that the piston can slide along the clamping lever.
  • contact surfaces are provided on both sides of the clamping lever and the piston, which slide along each other in the course of the clamping operation and thereby remain in permanent surface contact.
  • the clamping lever and the piston are preferably designed such that this surface contact is preferably maintained at least over a pivot angle of the clamping lever relative to the housing of at least 20 °, preferably of at least 45 °.
  • the surface contact is in view of the transfer of large forces from the piston to the clamping lever advantage.
  • such a design is particularly resistant to penetrating chips.
  • the clamping element can be operated hydraulically, pneumatically or electrically.
  • Under the piston according to the invention is a pure Translational movable and motor kraftbeetzschlagbares device understood without this, the nature of the application of force plays a role.
  • the tensioning lever has a lever section and a contact surface section which is pivotable relative to the lever section about a secondary pivot axis, wherein the tension lever-side contact surface is provided on the contact surface section. Due to the separate contact surface portion, a continuous surface contact between the piston and the clamping lever can be realized particularly advantageously and simply.
  • the contact surface portion is pivotable about a relative to the contact surface portion and relative to the lever portion stationary sub-pivot axis relative to the lever portion.
  • the pivotal movement of the contact surface portion relative to the lever portion is preferably provided by a clevis connection, which ensures a symmetrical and particularly efficient power transmission between the contact surface portion and the lever portion.
  • the contact surface portion may in particular be formed as a one-piece component, which has at opposite ends in each case a bolt portion, between which the contact surface is provided for introducing force.
  • An alternative embodiment provides that the contact surface portion and the bolt, which is provided in the clevis, are provided as two separate components, wherein the contact surface portion with the contact surface has a bore, by means of which it is pivotally mounted on the bolt.
  • the contact surface portion and the piston are matched to one another such that in the direction of the sub-pivot axis there is a positive connection, so that the contact surface portion needs no additional security measures against slipping out of the lever portion.
  • the contact surfaces on the clamping lever and / or on the piston are preferably flat. However, there are also other designs, especially with spherical contact surfaces possible.
  • a particularly advantageous embodiment of the piston-side contact surface provides that this is inclined, so that a surface normal on the piston-side contact surface with the extension direction includes an angle greater than 0 °, preferably between 0 ° and 15 °.
  • Such an inclined position of the contact surface causes the piston is acted upon in the course of tensioning the clamping element with a transverse force transverse to the extension direction.
  • this is usually not desired, but by the inclination, it is also possible to compensate for other forces caused by transverse forces on the piston, so that the forces acting on the piston transverse forces can be reduced by the inclination or fully compensated.
  • the inclination of the piston-side contact surface is such that the piston-side contact surface to the pivot axis against the extension direction drops.
  • the piston is acted upon by the tensioning of the clamping element away from the pivot axis with a transverse force.
  • the transverse force can be adjusted at a coordinated inclination of the contact surface so that it is equal to a force acting in the opposite direction on the piston transverse force, the result of the fact that the clamping lever when describing the circular path around the main pivot axis due to the static friction or sliding friction between piston and clamping lever pulls the piston in the direction of the pivot axis.
  • the piston and the tensioning element are matched to one another such that the piston has a return force can be transmitted to the clamping element against the extension direction.
  • the piston is not only able to act upon extension, the clamping element with a clamping force, but also able to return the clamping lever with an opposite direction to release a clamping state again.
  • the piston has for this purpose extensions, which engage in undercuts of the clamping lever, in particular the contact surface portion of the clamping lever. This embodiment enables a safe production of the relaxed state by retracting the piston.
  • the piston is connected by means of a sliding guide with the clamping lever, which is designed as a groove guide or dovetail guide.
  • This guide combines the necessary measures for the introduction of forces from the piston to the clamping lever in the extension and return direction.
  • a guide with a corresponding embodiment also achieves a positive connection between the piston and the contact surface section in the direction of the main pivot axis, whereby the contact surface section of the tension lever is secured against slipping out of the lever section of the tension lever.
  • the contact surfaces and / or the sub-pivot axis are arranged in the end state in the extension direction of the piston beyond the main pivot axis.
  • the final state is characterized in that the clamping region in this position is aligned approximately parallel to the clamping surface.
  • the clamping area on the clamping lever need not be flat, but may for example also have a spherical shape and be provided for line contact with the workpiece. In such a case, not only exists an end position, but a range of different positions of the clamping lever, depending on the attachment of the clamping element and the shape of the workpiece can serve as end positions.
  • the embodiment according to this development makes it possible to keep the contact surfaces on the piston and the clamping lever or the contact surface portion of the clamping lever small and still allow pivoting of the clamping lever by a large angle, preferably by at least 60 °.
  • the contact surfaces that slide along in the course of clamping the clamping element by the circular movement of the clamping lever side contact surface and the linear movement of the piston-side contact surface along, are initially shifted by this configuration at the beginning of the clamping operation in a first direction against each other until the contact surfaces or the Sub-pivot axis on the one hand and the main pivot axis on the other hand in the extension direction at the same height.
  • the contact surfaces or the sub-pivot axis in the end state in the extension direction of the piston are preferably arranged beyond the main pivot axis, that an imaginary line connecting the main pivot axis on the one hand and the contact surfaces and the sub-pivot axis on the other hand with the extension direction of the piston an angle of less than 85 °, preferably an angle between 60 ° and 80 °.
  • the housing has a main portion and a fixedly connected to the main portion bearing portion, wherein the bearing portion is provided for pivotally mounting the clamping lever.
  • a double-threaded screw is preferably provided, by means of which the bearing section is connected to the main section.
  • This double-threaded screw is pin-shaped and has at opposite ends a left-handed and a right-hand thread.
  • bores with opposing threads are provided on the bearing section and on the main section.
  • the double screw thread allows a joining of the bearing section to the main section, in which the orientation of the bearing section to the main section is freely definable.
  • the double-threaded screw which has no screw head, but instead, for example, a hexagon socket, particularly space-saving.
  • the housing has an approximately cylindrical fixing portion, on whose outer side an external thread is provided and by means of which the housing can be screwed in its entirety into a corresponding bore of a clamping device.
  • the fixing portion which is an integral part of the housing and is fixedly connected to this, serves itself to determine the housing.
  • a corresponding recess with an internal thread is provided on a clamping surface on which the workpiece is to be clamped, into which the clamping element can be screwed in its entirety.
  • the relative position of the clamping element relative to a clamping surface is flexibly adjustable by the depth of engagement, whereby an applicability for workpieces of different heights is achieved.
  • the clamping element can be screwed into the clamping device only a few turns deep, while in other smaller workpieces the fixing section is screwed approximately completely into the clamping device.
  • a counter means in particular a lock nut, is additionally provided on the outside of the fixing section.
  • Media supply lines for supplying a pressure medium such as air or oil may be provided on the underside of the housing, in particular on the underside of the fixing portion.
  • a configuration is considered particularly advantageous in which corresponding connections are provided on the lateral surface of the cylindrical fixing section.
  • at least two inlet openings for supplying the pressure medium are provided on the outside of the cylindrical fixing portion, wherein the inlet openings are spaced apart in the direction of a cylinder axis of the fixing portion. These two inlet openings can be used alternatively.
  • the other or the other inlet openings are preferably closed by means of plugs.
  • the design with multiple inlet openings makes it possible, regardless of the depth of engagement of the fixing section to have at least one inlet opening at which a supply of the pressure medium can take place.
  • the invention also includes a generic clamping element, wherein the clamping lever is pivotally mounted about a pivot axis by means of a clevis connection to the housing.
  • the clevis can be provided both on the clamping lever and on the housing. Particularly preferred embodiment is considered, in which the clevis is provided on the clamping lever.
  • the use of a clevis connection between clamping lever and housing allows a particularly tilt-stable and play-free pivotal connection of the clamping lever with the housing, which can transmit very large forces.
  • clamping elements according to the invention can be designed relative to one another and relative to a clamping surface with respect to the arrangement of the clamping lever, the piston and the housing.
  • Preferred embodiments comprise an embodiment as a vertical clamping element, in which the force vector of the force acting on the workpiece from the clamping region of the clamping lever in the final state runs approximately parallel (+/- 15 °) to the extension direction of the piston and to a surface normal on the clamping surface.
  • They further include a configuration as a horizontal clamping element, in which the piston is aligned approximately parallel (+/- 30 °) to the clamping surface.
  • a special form of these horizontal clamping elements form the pull-down clamping elements, in which the force vector of the force acting on the workpiece from the clamping region of the clamping lever with the clamping surface at an angle of about 30 ° (+/- 10 °).
  • the Fig. 1 and 2 show a first embodiment of a tensioning element according to the invention. It shows the Fig. 1 the composite state and the Fig. 2 the items.
  • the tensioning element has a housing 10, which in turn has a main portion 20 and a bearing portion 30.
  • the main section 20 has a cuboidal section 22 and a cylindrical section 24 integrally formed thereon.
  • a cylinder bore not shown, which is provided in the manner described below for receiving a piston 40 extends.
  • a through hole 26 for guiding the piston 40, which extends to an upper side of the block-shaped block 22.
  • the bearing section 30 has a lower, approximately conical section 30a and a pad 30b integrally connected thereto on the upper side with a through-hole 30c.
  • extensions 30d are provided, to which correspondingly in the cuboid portion 22 of the main portion 20 recesses 22a are provided.
  • the bearing portion 30 can thereby be placed on the main portion 20 in a rotationally fixed manner.
  • a double threaded pin 34 is provided which has a left-hand thread 34a at a first end and a right-hand thread 34b at its opposite second end.
  • a hexagon socket is provided on its lower end face.
  • holes 22 b are provided on the underside of the cone portion 30 a of the bearing portion 30 and the cuboid portion 22 of the main portion 20.
  • the bore 22b in the cuboid portion 22 is formed as a through hole, so that from a bottom via an Allen wrench of the double threaded pin 34 can be screwed, whereby by the opposing threads 34a, 34b, a firm connection between the main portion 20 and the bearing portion 30 can be produced.
  • a tensioning lever 50 represents the second main component of the tensioning element.
  • the tensioning lever 50 has a lever portion 52 and a contact surface portion 60.
  • the lever portion 52 opens at its front portion 52a in a clamping portion 54.
  • the front portion 52a is followed by a clevis portion 52b with a U-shaped cross section, which serves the purpose of a double clevis.
  • two pairs of bores 56, 58 are provided in the hole pair 56.
  • the contact surface portion 60 is rotatably inserted in the assembled state. This is designed as a cylindrical bolt, on the underside of a T-shaped groove 60a is milled, the groove bottom is formed by a contact surface 60b.
  • the housing 10 and the clamping lever 50 are in the assembled state of Fig. 1 connected in two ways.
  • a bolt 70 secured by means of two seeger rings 72 is pushed through the bores 58 in the tension lever 50 and the bore 30c in the pad 30b.
  • This bolt 70 acts in conjunction with the holes 30c, 58 as a pivot joint, by means of which the clamping lever 50 about a main pivot axis 2 relative to the housing 10 is pivotable.
  • the pad 30b has on both sides end surfaces 30e, which are spaced from each other according to the distance of the inner surfaces of the clevis portion 52b from each other.
  • the clamping lever 50 In the composite Condition is the clamping lever 50 thereby mounted on the bearing portion 30 that it is pivotable only about the main pivot axis 2, but has hardly any translational play.
  • the second connection between the housing 10 and the clamping lever 50 is realized by the piston 40.
  • This piston 40 is inserted from below into the cylinder bore of the housing 10 and guided in this movable. At its upper end 40a, it is formed corresponding to the contact surface portion 60 of the clamping lever 50 with a T-shaped profile section 42. This T-shaped profile section is inserted in the assembled state in the corresponding groove 60a and slidable in this.
  • the T-shaped profile 42 at the upper end of the piston 40 is formed to slightly sloping in the direction of the main pivot axis 2 and the bearing portion 30 so that an end face 42b limiting the end of the piston slightly drops.
  • the contact surface portion 60 which is rotatably mounted about a sub pivot axis 4 in the bores 56 of the lever portion 52 of the clamping lever 50, can align due to its pivoting corresponding to the slightly sloping design of the T-profile 42a.
  • the piston 40 is moved in the cylinder bore in the extension direction 1 by means of hydraulic pressure.
  • a tensioning process is described in detail in the Fig. 3a and 3b shown. Shown is the clamping element of Fig. 1 and 2 in a state used in a clamping surface 90 shown in dashed lines. The determination is carried out in a manner not shown by means of a screw connection of the clamping element on the clamping surface 90. On the clamping surface 90, a dotted workpiece 80 is placed.
  • the Fig. 3a shows first the initial state.
  • the piston 40 In this initial state, the piston 40 is at its lower end position. Since the clamping lever 50 due to the sliding of T-slot 60a and T-profile 42 with respect is positively coupled to its orientation to the position of the piston 40, it is in the initial state of Fig. 3a in an upwardly facing and spaced from the workpiece 80 position.
  • the piston 40 is moved in the direction of arrow 1 upwards. Together with the piston and the contact surface portion 60 of the clamping lever 50 is moved with simultaneous rotation relative to the lever portion 52 upwards, since the end face 42b of the piston 40 presses on the corresponding contact surface 60b of the contact surface portion 60 in the groove bottom of the T-slot 60a.
  • the clamping lever 50 and thus the contact surface portion 60 are pivotable in their entirety only about the main pivot axis 4, the contact surface portion 60 deviates in the course of the movement in the direction of arrow 1 along the circular path 8 shown in dashed lines. In the perspective of Fig.
  • the contact surface section 60 is first displaced to the left as far as the position 60 'shown in dashed lines, while the end surface 42b and the contact surface 60b slide on one another with permanent surface contact. This permanent surface contact is ensured due to the rotatability of the contact surface portion 60 about the sub-pivot axis 4.
  • the maximum displacement is achieved in the position 60 ', when the main pivot axis 2 and the sub-pivot axis 4 in the extension direction 1 are at the same height.
  • the sliding direction rotates between the end face 42b and the contact surface 60b, so that the contact surface portion 60 further displaced to the right on the circular path 8 until the state Fig. 3b is reached.
  • the clamping element shown combines a very compact design with extremely high applied forces and a very high stability. Since only one pivot axis, the main pivot axis 4, is provided between the clamping lever 50 and the housing 10 and this is realized by a clevis connection, the high forces that occur in the region of the main pivot axis 2, no problem. Due to the geometry of the clamping lever 50, in which the main pivot axis 2 and the clamping area 54 are arranged approximately at the same height, the sub-pivot axis 4 of the contact surface portion 60, however, is arranged elevated relative to the clamping state, a particularly wide pivoting of the tension lever is achieved, without that this requires a particularly long configuration of the T-shaped groove 60a and / or the T-shaped profile 42.
  • connection between the piston 40 and the contact surface portion 60 is shown in a sectional view in FIG Fig. 4a shown.
  • the contact surface 60b is provided on the groove bottom of the groove 60a. The force is transmitted over a large area and thereby at comparatively low surface pressure from the hydraulic piston 40 to the tensioning lever 50 via the contact surfaces 42b, 60b which lie over one another on the surface.
  • the contact surface portion 60 is pulled down due to the undercut in the groove shape of the groove 60a, so that the cocked state is forcibly released.
  • the T-profile at the piston end has a vertical bar which is approximately as wide as the contact surface 42b. It is thereby achieved that at the contact surface 42b, the force transmission to the contact surface portion 60 is substantially homogeneous, without external, not directly supported by the vertical bar areas are pressurized significantly lower.
  • at least 80% of the contact surface of the piston are directly supported.
  • the Fig. 4b to 4d show alternative configurations of the connection between the piston 40 and the contact surface portion 60.
  • the end profile on the piston 40 and the groove on the contact surface portion 60 are L-shaped instead of T-shaped.
  • the groove has a circular segment-shaped cross-section. Accordingly, the profile at the end of the piston 40 is formed.
  • a special feature in the embodiment of Fig. 4d is that the profile is not integrally provided at the end of the piston, but is connected by means of a double-sided equipped with a threaded intermediate member with the piston 40.
  • FIGS. 5 and 6 show further embodiments of clamping elements according to the invention. In view of the interaction of the pistons 140, 240 with the clamping levers 150, 250, these embodiments do not differ from the embodiment of the FIGS. 1 to 3 ,
  • the two embodiments of the FIGS. 5 and 6 is common that the housing 110, 210 each having a cylinder portion 124, 224, on An external thread 125a, 225a is provided.
  • This external thread 125a, 225a makes it possible to screw the clamping element in its entirety into a corresponding bore with an internal thread in the region of the clamping surface of a clamping device.
  • a workpiece-dependent screwing depth can be achieved, whereby a particularly flexible use of the clamping elements of FIGS. 5 and 6 is possible.
  • a locking ring 225b is provided in each case, wherein this in the embodiment of the Fig. 5 not shown with.
  • Fig. 5 is another feature in the sensor 175.
  • This includes a cylindrical ring portion 176 which is fixedly mounted on the housing 110 in a manner not shown.
  • a bolt 172 by means of which the pivoting movement of the clamping lever 150 is realized with respect to the housing 110 and which is rotatably connected to the clamping lever 150 extends into this annular portion 176 inside.
  • the bolt has a radial bore, not shown, which rotates in the course of the pivoting movement of the clamping lever 150 together with this.
  • two proximity sensors 177a, 177b are provided on the ring section 176, each of which can detect whether the radial bore is located in its respective sensor area.
  • the functioning of the clamping element is characterized by simple and without direct control on the clamping element verifiable.
  • the sensor 175 is due to their construction insensitive to chips, as they can not get into the region of the sensible radial bore.
  • connection block 180 is provided, which are connected in a manner not shown with the cylinder portion 124 can and provides connection options for the required hydraulic lines.
  • An alternative embodiment is in the embodiment of the Fig. 6 intended.
  • the connections 282 are provided for the hydraulic fluid in the region of the external thread 225a.
  • two connections 282a for the application of force in the extension direction and two connections 282b for the application of force in the retraction direction are provided at different heights.
  • the connections 282a, 282b provided in each case for the same function make it possible, even with a screw-in depth, in which one of the two connections 282a, 282b is concealed, to use the other one.
  • the hidden connection is closed by means of a plug.
  • FIGS. 7 and 8 show a further embodiment of a tensioning element according to the invention, which in Fig. 7 is shown in the assembled state and in Fig. 8 is shown in the form of its individual parts.
  • the operation of this embodiment corresponds to the previous embodiments with respect to the individual components and their interaction.
  • the reference numerals for comparable components agree with respect to the last two digits.
  • FIGS. 7 and 8 The peculiarity of the embodiment of FIGS. 7 and 8 is that it is a horizontal tensioning element, in which the extension direction 301 of the lever 340 is aligned approximately parallel to a dotted indicated base surface 300.
  • the embodiment corresponds to the FIGS. 7 and 8 essentially the embodiment of the Fig. 1 to 3 .
  • a peculiarity in the design of the clamping lever 350 In this includes a first imaginary line between the main pivot axis 302 and the sub-pivot axis 304 with a second imaginary line between the main pivot axis 302 and the clamping area 354 an angle of only about 80 °.
  • Fig. 9a and 9b is shown - the direction 305 of the clamping force on a workpiece 380 in the state of Fig. 9b with an extension direction 301 of the piston 340 approximately at a right angle.
  • the Fig. 10 as well as the Fig. 11a and 11b show a variation of the embodiment of the Fig. 7 to 9 ,
  • the decisive difference lies again in the design of the clamping lever 450.
  • the angle between an imaginary line between the secondary pivot axis 404 and the main pivot axis 402 on the one hand and a further imaginary line between the main pivot axis 402 and the tension range 454 is again smaller here and is only about 30 °.
  • this particular embodiment of the clamping lever 50 causes the clamping force in a flat angle of about 30 ° downwards.
  • the tensioning element can therefore be used as a pull-down tensioning element.

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Claims (12)

  1. Élément de serrage pour la fixation d'une pièce (80 ; 380 ; 480), comprenant :
    - un boîtier fixe pendant le fonctionnement (10; 110; 210; 310),
    - un levier de serrage (50; 150; 250; 350; 450) déplaçable par rapport au boîtier (10; 110; 210; 310), comprenant une région de serrage (54; 354; 454) pour la sollicitation par force de la pièce (80; 380; 480) et
    - un piston (40; 140; 240; 340; 440) pouvant être sorti par translation par rapport au boîtier (10; 110; 210; 310) dans une direction de sortie (1; 301; 401),
    dans lequel
    - le piston (40; 140; 240; 340; 440) est réalisé de manière à faire pivoter le levier de serrage (50; 150; 250; 350; 450) de telle sorte que le levier de serrage (50; 150; 250; 350; 450) puisse être déplacé entre un état de fin de course relâché et un état de fin de course serré,
    - le levier de serrage (50; 150; 250; 350; 450) est monté de manière à pouvoir pivoter autour d'un axe de pivotement principal (2; 302; 402) sur le boîtier (10; 110; 210; 310),
    - le piston (40; 140; 240; 340; 440) présente une surface de contact (42b) le long de laquelle glisse une surface de contact (60b) du levier de serrage (50; 150; 250; 350; 450) correspondant à la surface de contact (42b) du piston (40; 140; 240; 340; 440) lors d'un déplacement de serrage conjoint du levier de serrage (50; 150; 250; 350; 450) avec le piston (40; 140; 240; 340; 440), les surfaces de contact (42b, 60b) se trouvant toujours au moins en partie en contact de surface l'une avec l'autre lors du déplacement de serrage conjoint du levier de serrage (50; 150; 250; 350; 450) avec le piston (40; 140; 240; 340; 440), et
    - le levier de serrage (50; 150; 250; 350; 450) présente une portion de levier (52) sur laquelle est prévue la région de serrage, et une portion de surface de contact (60; 360; 460) déplaçable par pivotement par rapport à la portion de levier (52) autour d'un axe de pivotement auxiliaire (4; 304; 404), la surface de contact (60b) du côté du levier de serrage étant prévue sur la portion de surface de contact (60; 360; 460),
    caractérisé en ce que
    - la portion de surface de contact (60; 360; 460) est réalisée sous forme de boulon cylindrique (60; 360; 460) s'étendant dans la direction de l'axe de pivotement auxiliaire (4; 304; 404) et pouvant tourner autour de l'axe de pivotement auxiliaire (4; 304; 404), dans lequel boulon est fraisé, au niveau de son côté inférieur, un guide coulissant sous la forme d'un guide en forme de queue d'aronde ou d'un guide en forme de rainure, dont la base de rainure est formée par la surface de contact (60b),
    - le piston (40; 140; 240; 340; 440) et la portion de surface de contact (60; 360; 460) sont adaptés l'un à l'autre au moyen du guide coulissant de telle sorte que le piston (40; 140; 240; 340; 440) puisse transmettre une force de rappel à l'encontre de la direction de sortie (1; 301; 401) sur la portion de surface de contact (60; 360; 460), le guide coulissant étant réalisé à cet effet sous la forme du guide en forme de queue d'aronde ou du guide en forme de rainure qui présente des saillies sur le piston (40; 140; 240; 340; 440) qui s'engagent dans des contre-dépouilles du boulon (60; 360; 460).
  2. Élément de serrage selon la revendication 1,
    caractérisé en ce que
    la portion de surface de contact (60; 360; 460) est réalisée sous forme de composant d'une seule pièce qui présente aux extrémités opposées à chaque fois une portion de boulon, entre lesquelles portions de boulon est prévue la surface de contact (60b).
  3. Élément de serrage selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les surfaces de contact (42b, 60b) sont planes.
  4. Élément de serrage selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la surface de contact (42b) du côté du piston est inclinée obliquement, de telle sorte qu'une normale à la surface, sur la surface de contact (42b) du côté du piston, forme avec la direction de sortie (1; 301) un angle supérieur à 0°, de préférence compris entre 0° et 15°.
  5. Élément de serrage selon la revendication 4,
    caractérisé en ce que
    la position oblique de la surface de contact (42b) du côté du piston est configurée de telle sorte que la surface de contact (42b) descende vers l'axe de pivotement principal (2; 302) dans le sens opposé à la direction de sortie (1; 301).
  6. Élément de serrage selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les surfaces de contact (42b, 60b) et/ou l'axe de pivotement auxiliaire (4; 304) sont disposés dans l'état de fin de course dans la direction de sortie (1; 301) du piston au-delà de l'axe de pivotement principal (2; 302).
  7. Élément de serrage selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le boîtier (10; 110; 210; 310; 410) présente une portion principale (20) et une portion de palier (30) connectée fixement à la portion principale (20), la portion de palier (30) étant prévue pour le support sur palier pivotant du levier pivotant (50; 150; 250; 350; 450).
  8. Élément de serrage selon la revendication 7,
    caractérisé en ce que
    la portion de palier (30) est connectée à la portion principale (20) au moyen d'une vis à double filetage (34).
  9. Élément de serrage selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le boîtier (110; 210) présente une portion de fixation (124; 224) approximativement cylindrique, sur le côté extérieur de laquelle est prévu, au moins en partie, un filetage extérieur (225a, 225b) et au moyen duquel le boîtier (110; 210) peut être vissé dans sa totalité dans un alésage correspondant d'un dispositif de serrage.
  10. Élément de serrage selon la revendication 9,
    caractérisé en ce
    qu'un cylindre est prévu dans la portion de fixation (124; 224) pour recevoir le piston de manière déplaçable.
  11. Élément de serrage selon la revendication 10,
    caractérisé en ce
    qu'au moins deux ouvertures d'entrée (282a, 282b) sont prévues sur le côté extérieur de la portion de fixation cylindrique (224) pour l'introduction d'un fluide sous pression, les ouvertures d'entrée (282a, 282b) étant espacées l'une de l'autre dans la direction d'un axe de cylindre de la portion de fixation (224).
  12. Élément de serrage selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le levier de serrage (50; 150; 250; 350; 450) est monté sur le boîtier (10; 110; 210; 310; 410), au moyen d'une connexion à tête fourchue de manière à pouvoir pivoter autour d'un axe de pivotement (2; 302; 402).
EP09700751.2A 2008-01-04 2009-01-03 Élément de serrage Not-in-force EP2242619B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810004286 DE102008004286A1 (de) 2008-01-04 2008-01-04 Spannelement
PCT/EP2009/000009 WO2009087075A1 (fr) 2008-01-04 2009-01-03 Élément de serrage

Publications (2)

Publication Number Publication Date
EP2242619A1 EP2242619A1 (fr) 2010-10-27
EP2242619B1 true EP2242619B1 (fr) 2014-06-11

Family

ID=40622261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09700751.2A Not-in-force EP2242619B1 (fr) 2008-01-04 2009-01-03 Élément de serrage

Country Status (4)

Country Link
EP (1) EP2242619B1 (fr)
CN (1) CN101970177B (fr)
DE (1) DE102008004286A1 (fr)
WO (1) WO2009087075A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2508286A1 (fr) 2011-04-06 2012-10-10 Wilhelm Altendorf GmbH & Co. KG Scie à ruban dotée d'un dispositif de serrage ajustant
DE102011100184B3 (de) * 2011-05-02 2012-08-30 Hohenstein Vorrichtungsbau Und Spannsysteme Gmbh Spannvorrichtung mit Ge- und Entspanntzustandskontrollen
DE102011107722B3 (de) * 2011-07-18 2012-10-31 Hohenstein Vorrichtungsbau Und Spannsysteme Gmbh Vorrichtung mit Sicherheitskomponenten
FR3023738B1 (fr) * 2014-07-17 2016-07-29 Christophe Boiteux Systeme de maintien angulaire avec utilisation de coin a renvoi

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19531890A1 (de) * 1995-08-30 1997-03-06 David Fischer Flachspannelement

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3001404A1 (de) * 1980-01-16 1982-08-19 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Vorrichtung zum aufspannen eines werkstueckes auf einen spanntisch
DE3736421C1 (en) * 1987-10-28 1988-10-27 Hilma Gmbh Maschf Workholding fixture with retractable clamping jaw
DE4121141A1 (de) * 1991-06-26 1993-01-07 Safet Vajzovic Spannvorrichtung
DE4307058A1 (de) * 1993-03-06 1994-09-08 David Fischer Spannvorrichtung zum Spannen von Werkstücken auf Maschinentischen oder Paletten
JP2002154024A (ja) * 2000-11-20 2002-05-28 Kosmek Ltd クランプ装置
DE102004004413A1 (de) * 2004-01-29 2005-08-18 Frank Entzmann Spannvorrichtung
DE102004056229A1 (de) * 2004-11-22 2006-05-24 Günter Neumann GmbH Kraftspanner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19531890A1 (de) * 1995-08-30 1997-03-06 David Fischer Flachspannelement

Also Published As

Publication number Publication date
EP2242619A1 (fr) 2010-10-27
CN101970177B (zh) 2015-05-20
DE102008004286A1 (de) 2009-07-09
WO2009087075A1 (fr) 2009-07-16
CN101970177A (zh) 2011-02-09

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