EP2001638B1 - Clamping device - Google Patents
Clamping device Download PDFInfo
- Publication number
- EP2001638B1 EP2001638B1 EP07711972A EP07711972A EP2001638B1 EP 2001638 B1 EP2001638 B1 EP 2001638B1 EP 07711972 A EP07711972 A EP 07711972A EP 07711972 A EP07711972 A EP 07711972A EP 2001638 B1 EP2001638 B1 EP 2001638B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide shoe
- chucking
- longitudinal axis
- clamping
- 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.)
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/06—Arrangements for positively actuating jaws
- B25B5/10—Arrangements for positively actuating jaws using screws
- B25B5/104—Arrangements for positively actuating jaws using screws with one screw and one clamping lever and one fulcrum element
- B25B5/108—Arrangements for positively actuating jaws using screws with one screw and one clamping lever and one fulcrum element the screw contacting one of the ends of the lever
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/006—Supporting devices for clamps
Definitions
- the invention relates to a clamping device for clamping an object, for example a workpiece, relative to a base body, for example a clamping table, according to the preamble of claim 1.
- a tensioning device is known from the document EP 0 714 734 B known.
- Clamping devices of the kind relevant here are used, for example, in factories or manufacturing plants, in order to keep a workpiece in a defined position when machining forces are applied to a base body.
- An exemplary further use of tensioning devices are test laboratories, such as vibration laboratories or the like.
- an injection mold can be clamped on a clamping device on a clamping table.
- the clamping device according to the invention can be used in any technical fields of application in which an easily provided and releasable fixation of an object with respect to a body of interest, with a broad interpretation of the terms “object” and “body” without a mandatory restriction of the same to "workpieces” and a “(clamping) table” should take place.
- a base body has a groove with a T-shaped cross-section.
- One in one Side view simplified as a T-shaped clamping lever has in the free end region of the vertical leg of the T an axle body, which is insertable to form a displaceable in the direction of the longitudinal axis of the T-slot pivot axis in the T-groove.
- an actuating element formed as a screw, the end face of which is supported in a bottom of the T-slot.
- a carrier is interposed, which is screwed, for example, in any position and orientation with a sliding block of a clamping table. Notwithstanding the one-piece design of the axle body of the clamping lever is not stored in the T-slot of the clamping table, but rather in a T-slot of the carrier. The essential parts of the two-part design are thus the carrier and the clamping lever.
- the clamping device has a carrier which is firmly connected to the clamping table.
- a guide shoe is displaceable in the direction of a longitudinal axis in that the carrier has a longitudinal recess, for example a T-groove, in which a T-shaped cross section of the guide shoe is inserted.
- the guide shoe has a bearing eye with a partially cylindrical lateral surface with a circumferential angle of approximately 180 °.
- a clamping lever has between an actuator designed as a screw and a contact surface, which is arranged in the actuating element opposite end portion, an axis oriented transversely to the longitudinal axis of the axle body, which is used in the direction of the longitudinal axis in the T-slot of the carrier and the bearing eye such that the axle body is mounted on the lateral surface to form a pivot axis.
- a position and an orientation of the longitudinal axis can first be specified via the attachment of the carrier to the clamping table, which is independent of holes, threads, recesses and grooves of a clamping table.
- the application range of the clamping device on the clamping table can be increased and / or made possible that the distance of the exercise of a clamping force can be increased to a workpiece from the mounting location of the clamping device on the clamping table, which brings improved clamping options with it.
- the one-, two- or three-part designs may have additional components, without falling out of the previously discussed basic designs, such as return springs, bearing body, screws, pins and the like. Also possible are additional degrees of freedom between body and clamping lever.
- FR 2 463 408 discloses mounting a support body on a chuck table to provide a base for a chuck, wherein the top of the support body is raised from the chuck table.
- the support body further has a T-shaped stone, with which the clamping device is connected firmly and without degrees of freedom in the direction of a longitudinal axis.
- the structural design of the pivot bearing of the clamping lever relative to the guide shoe is not further addressed in the document.
- CH 597 976 relates to a three-part design in which the carrier with T-shaped cross-section is encompassed by the guide shoe. Above this connection region between the guide shoe and the carrier, a single vertical leg is provided which carries in a bore a fixed with a grub screw, designed as axle axle axle body. In the region of the pivot axis of the clamping lever is formed with two parallel, extending in the longitudinal direction of the clamping lever side cheeks, which have recesses for the formation of bearing eyes through which the axle shaft passes.
- CH 463,244 relates to a clamping device, by means of which not a clamping in a vertical direction of a clamping table is to take place, but rather in a horizontal direction.
- the invention has for its object to provide a clamping device, which is improved in terms of construction costs, the installation effort and / or the disassembly effort and the mechanical stresses during clamping.
- a tensioning device of three-part design is used with a carrier, a guide shoe and a tensioning lever, wherein it is not excluded that other components are used which can also guarantee additional functions or degrees of freedom.
- the carrier is fixed to the main body, such as a clamping table, connectable and has a contact surface, which has an extension in a longitudinal direction.
- the use of such a carrier has the advantage that over a plurality of holes, slots or grooves or different connecting means diverse connection possibilities can be provided with a clamping table, which result in the fact that the clamping device in many positions and for a variety of alignment possibilities on the body can be attached.
- the carrier provides a contact surface in the area in which the carrier comes into operative connection with the guide shoe.
- the guide shoe according to the invention is displaceable in the longitudinal direction relative to the carrier, and thus also relative to the main body or clamping table.
- a shift degree of freedom can be used to provide a further adjustment of the position of a clamping lever for already fixed carrier, for example, a fine adjustment or adaptation to different geometries or processing states of a workpiece to be clamped.
- an at least temporary fixing of the degree of freedom between the guide shoe and the carrier for example via a screw acting between the guide shoe and the carrier, which can bring about positive engagement or frictional engagement in the region of its end face of the screw.
- a detent or lock between the guide shoe and the carrier to specify or define selected positions with a predetermined detent dimension of different positions in the direction of the longitudinal axis.
- the guide shoe has a counter surface, which comes to rest on the contact surface of the wearer.
- the contact surface and counter surface limit movement of the guide shoe in a direction which is directed away from the main body, in particular in the direction of the clamping of the workpiece.
- contact surface and counter surface can provide a guide for movements corresponding to the above-described degree of freedom. Also possible by suitable design of the longitudinal extent and arrangement of contact surface and counter surface, the above-mentioned telescopic design of guide shoe and carrier. About the dimensioning of contact surface and mating surface, the acting surface pressures during a clamping of a workpiece can be specified.
- the guide shoe has legs which laterally surround the carrier and have an inwardly angled end region. These end regions form the mating surfaces, which the guide shoe against stresses in the course of tightening Secure carrier and possibly provide a leadership.
- This embodiment of the invention utilizes the knowledge that for a lateral encompassing a good support of the clamping device, in particular against tilting about the longitudinal axis, is given. The reason for this is that in such an embodiment, the mating surfaces have a greater distance from the longitudinal axis than may be the case with support of any T-shaped end portion of the guide shoe according to the above-mentioned prior art, in a T-slot of the wearer intervenes. Thus, acting around the longitudinal axis moments can be better absorbed.
- the invention has recognized that, for a lateral encompassing of the carrier according to the invention, embodiments, for example correspondingly CH 597 976 in which the guide shoe has a cross-section in the form of an inverted Y, the adjacent lower leg make the connection to the carrier and the third central leg serve to support the clamping lever, are disadvantageous due to occurring elastic deformations of the guide shoe and the dimensions given by the allowable deformations
- the large clamping forces which are guided in the area of the mating surfaces in the guide shoe, cause bending stresses of both the side of the carrier arranged leg and the webs, in the region of which the aforementioned two legs are brought together to the central leg, which carries the axle.
- a reduced dimensioning, size and a reduced weight of the clamping device can result from the inventive design, which may be due solely to the fact that the aforementioned "diversion" of the clamping force to a central central support leg according to CH 597 976 is avoided, whereby material areas are saved.
- thighs which are arranged laterally of the carrier and the clamping lever, resulting in free space that can be used, for example, to arrange the clamping lever with its pivot axis further down and closer to the carrier or between Carrier and clamping lever to arrange other components, such as a return spring.
- a further embodiment of the invention makes use of the knowledge that according to FIG FR 2 463 408 the clamping device is expensive to manufacture and assemble. Without that a manufacturing and assembly of the clamping device of this document shows in detail, this clamping device is a factory to be mounted once and not disassembled in operation assembly with clamping lever, axle body and guide shoe.
- clamping lever and axle body a structural unit, for example, already may be formed at the factory or is formed in a Vormontage suits by the user.
- This assembly can then be used according to the invention as a whole in the guide shoe and, if necessary, again completely removed from this.
- Such insertion can also be made at the factory, whereby the factory installation is simplified, or made by a user.
- Allowing removal of the assembly allows replacement of the assembly in the event of damage to elements thereof. Also possible is the replacement of a clamping lever with the axle body with another clamping lever with associated axle body, the clamping lever may have, for example, a different geometry, crank and / or length for different purposes.
- the inventive design enables the first time such a simplification of the assembly and removal thereof for a three-part clamping device in which the guide shoe has legs which are arranged laterally both the carrier and the clamping lever.
- the axle body does not form a structural unit with the tension lever, but rather with the guide shoe, resulting in corresponding effects and advantages for the above-described technical effects and advantages.
- the axle body may be fixedly connected to the guide shoe or the tensioning lever, or may be mounted rotatably relative thereto.
- An insertion and removal of the assembly is preferably carried out by a suitable recess or groove of the guide shoe, which recess is oriented, for example, in the longitudinal direction and has an extension transverse to the longitudinal direction, which is greater than the length of the axle body.
- such a recess can be used multifunctional, if this serves on the one hand to use the unit and / or to remove, and on the other hand serves to let the carrier pass through the guide shoe in the assembled state of the tensioning device.
- the free space between the tensioning lever and an upper side of the carrier resulting from the invention can be used to arrange a spring element between an underside of the tensioning lever and an upper side of the carrier.
- a spring element can serve to pivot without appropriate action by the actuating element, the clamping lever in an initial position, which is directed in particular by the workpiece to be clamped away.
- a spring element can serve to press the axle body against a lateral surface of a bearing eye.
- Such a spring element used according to the invention may be any spring element, in particular a torsion spring acting about the pivot axis or a straight or curved spring acting in the circumferential direction of the tension lever, an elastomeric spring element, a bending element or the like.
- the return spring is formed as a leaf spring made of a spring steel, which is screwed in one end region with the guide shoe and in another end region, possibly under bias, applied to the clamping lever or vice versa.
- the leaf spring can press the bearing body against the lateral surface of the bearing eye, for example in a central region of the leaf spring.
- the clamping lever has two extensions arranged on both sides of the clamping lever, which form the axle body. These may for example be welded to the clamping lever or be introduced via a press fit into a suitable bore of the clamping lever. The extensions can then be mounted on a lateral surface of a bearing eye.
- the extensions have an at least partially cylindrical surface
- the cross-section of the projections have a curved, in particular elliptical contour, which comes to rest on a different contour of a bearing eye, for example a straight-line contour, which may have the advantage that, with a pivoting of the tension lever, the location of the pivot axis moves, as a result of which the force relationships the clamping lever can be kept independent of the swivel angle with appropriate specification of the contour of the extensions and / or the bearing eye, cf. in detail EP 0 391 346 , It is also possible that between the extensions and this supporting contour, a further degree of freedom for a longitudinal displacement is realized.
- An improved guidance of the guide shoe relative to the carrier may result if the carrier has a lateral, oriented in the direction of the longitudinal axis groove, are guided in the webs of the leg transverse to the longitudinal axis.
- a guide can be done, for example, with both directional senses in the direction of the clamping force, so that on the one hand the movement of the guide shoe away from the base body is avoided, including a boundary of the groove forms the contact surface.
- the opposite boundary surface of the groove the position of the guide shoe in the downward direction before in the event that the guide shoe is not subjected to clamping forces. It is also possible that through the bottom of the groove a guide in a horizontal plane and transverse to the longitudinal axis of the tensioning device takes place.
- tensioning lever can be produced particularly easily integrally with the extensions as a casting
- the invention has further recognized that it is possible to manufacture the carrier and / or the guide shoe in an extrusion process, possibly with machining finishing.
- the actuator may be formed as a screw with a hexagon whose diameter corresponds to the diameter of a hexagon socket for mounting screws of the carrier to the clamping table.
- the invention proposes to form the carrier at least over a part of its longitudinal extent with a double-T-section, wherein the double-T-section automatically forms a groove, which are used in the sense explained above can. Furthermore, by using the double-T cross section, the area moment of inertia of the carrier can be increased, whereby unwanted deflections of the carrier can be reduced.
- the underlying, reverse T provides a widened compared to the prior art supporting surface of the carrier on the clamping table, so that a good support and snapshot is given.
- Fig. 1 and 2 show a carrier 1, which has a lengthened extension in the direction of a longitudinal axis 2 in relation to a groove stone which is usual for use in a clamping table.
- the carrier 1 has a plurality of through holes 3 distributed uniformly over its longitudinal axis, which can be provided, for example, with a counterbore in the end region facing away from a base body 4, in order to receive a head of a screw extending through the through holes 3, such that the screw is flush with an upper side 13 of the carrier 1 completes.
- the carrier 1 has in the region of both side surfaces corresponding grooves 5, 6, which have an approximately U-shaped cross section, in particular with rounded portions in the transition region of the base leg 7, which forms a bottom 8, to the side legs 9, 10, the contact surfaces 11, 12 form. At least in one end region may extend in the horizontal direction and transverse to the longitudinal axis of the carrier 1, a through hole or blind bore 34 or a threaded bore extending from the bottom 8 of the groove 5, preferably in the transition region to an adjacent side legs 9, 10th
- Fig. 3 to 6 show a guide shoe 14.
- orientations such as “horizontal” and “vertical” are used for deployment of the tensioner on a chuck table with horizontal chucking surface. It is understood that for an application of the clamping device with a different orientation or different clamping devices, the orientations must be adjusted accordingly.
- the guide shoe 14 is formed substantially symmetrical to a vertical longitudinal central axis and has one in the views according to FIGS. 5 and 6 recognizable horizontal U-shaped basic contour, in which the central leg of the U is formed with a widened plate 15, which extends approximately over half the longitudinal extension of the guide shoe 14.
- On both sides of the plate 15 are in the vertical direction up and down extending legs 16, 17 or cheeks, wherein the plate 15 is fixedly connected to the legs 16, 17, in the vertical direction approximately centrally on the legs 16, 17.
- the legs 16, 17 each have a bearing eye 18, 19, which are arranged in alignment with each other and transverse to the longitudinal axis 2.
- the bearing lugs 18, 19 have an upper curved lateral surface 20, 21.
- the bearing lugs 18, 19 are arranged approximately at the level of the plate 15 or slightly above it.
- the bearing eyes 18, 19 are closed in the circumferential direction of the legs 16, 17 limited. Between the legs 16, 17 in the direction of the longitudinal axis continuous clearance 22 is formed, which is bounded by parallel or slightly V-shaped inclined inner sides 23, 24 of the legs 16, 17.
- the guide shoe forms a T-shaped groove 25 with a recess 45 formed by the transverse leg of T.
- the groove 25 is open at the bottom and oriented in the direction of the longitudinal axis 2.
- the legs 16, 17 have in the lower end portions radially inwardly angled webs 26, 27, the tops of which form mating surfaces 28, 29, with which the recess 45 is limited.
- the cross section of the groove 25 is formed corresponding to the cross section of the upper T of the carrier 1, so that the carrier 1 can be inserted into the groove 25, wherein the legs 16, 17 with the lower portions laterally engage around the upper half of the carrier 1 and the webs 27, 26 enter the grooves 5, 6.
- a horizontal guide transversely to the longitudinal axis 2 can be given by conditioning the inner end faces of the webs 26, 27 on the bottom 8 of the grooves 5, 6 or the side surfaces of the region of the carrier 1 on the inner surfaces of the legs 16, 17.
- a support of the guide shoe 14 can be given by conditioning the underside of the plate 15 to the top 13 of the carrier 1 or by conditioning the underside of the webs 26, 27 to the contact surface 12 of the grooves 5, 6.
- a recess 30 or cutout is provided, in the region in which a spring element, not shown in the figures, can be connected to the guide shoe 14, for which purpose the guide shoe 14 has a vertically oriented, continuous threaded bore 31 in the region of the recess 30, in which a suitable screw for fixing the spring element to the guide shoe 14 can be screwed.
- a spring element presses, for example, the guide shoe upwards, so that the mating surfaces 28, 29 come to bear against the contact surfaces 12.
- this has a recess or cutout 32 oriented in the direction of the longitudinal axis 2-2, which ends with a stop surface 33.
- a degree of freedom of movement of the guide shoe 14 relative to the carrier 1 in the direction of the longitudinal axis 2-2 is limited by the fact that a pin arranged in the bore 34, which does not necessarily have to protrude out of the groove 5 beyond the side surfaces of the carrier 1, abuts against it the stop surface 33 comes.
- a tensioning lever 35 which has two legs 36, 37, in whose connection region the pivot axis 38 is arranged. In the region of the free end region of the leg 36, this has a horizontal and transverse to the longitudinal axis oriented bore 39, which may be formed as a through hole, blind hole or threaded. In the region of the opposite end region of the leg 37, an approximately vertically oriented or in the installed state approximately perpendicular to the plate 15 oriented threaded bore 40 is provided.
- Cross to the drawing level according to Fig. 7 extend on both sides projections 41, 42 which have an approximately elliptical cross-section, in the lower end region of the connecting portion of the legs 36, 37 are arranged and form an axle body 50.
- the extensions 41, 42 have an upper abutment surface 43, which is curved.
- the legs 36, 37 of the clamping lever 35 may, depending on the Krafter Monsham and the paths to be covered in the course of a tension of a workpiece have the same or different lengths and, as Fig. 7 can be seen cranked to bring one hand, the threaded hole 40 in a desired height and on the other hand by a crank of the leg 36 to find a suitable geometry that can be particularly advantageous passed past a tool to be clamped.
- 10 to 12 show a clamping device 54 in the assembled state, for which the carrier 1 via a fastening screw 44 which extends through a through hole 3, for example via a sliding block, with a base 4, in particular a clamping table, is connected.
- An extension of the oriented in the direction of the longitudinal axis 2-2 recess 45 of the groove 25 of the guide shoe 14 in the transverse direction is chosen to be greater than the distance from the outside Furthermore, the extent of the recess 45 in the vertical direction is greater than the dimension of the projections 41, 42 in the vertical direction.
- the guide shoe can be pushed onto the carrier 1 in the direction of the longitudinal axis 2-2, the carrier 1 entering the groove 25 of the guide shoe 14. Since the carrier 1 at least partially fills the recess 45 of the groove 25, the clamping lever 45 can no longer be intentionally or unintentionally removed from the guide shoe 14 as long as the carrier 1 is arranged in the guide shoe 14.
- a threaded bolt 46 is screwed, which carries in its the base body 4 end facing a ball head 47 with a bearing plate 48 with possibly enlarged cross-section.
- a threaded bolt 46 With the screwing of the threaded bolt 46 in the threaded bore 40 of the bearing plate 48 comes to rest against the top of the plate 15.
- an increasing axial force is generated in the threaded bolt 46, which acts on the clamping lever 35 and oriented counterclockwise Moment generated about the pivot axis 38, which is inclined to press the free end portion of the leg 36 in the direction of the base body 4, whereby a workpiece can be clamped between the base body and this end.
- the abovementioned end region can be a substantially U-shaped pressing element 49, cf. Fig. 13 ,
- the contact pressure element has bores in the region of side limbs via which the pressure plate 49 can be connected pivotably about an axis predetermined by the bores to the bores 39 of the tensioning lever 35 in a manner known per se, for example via screws or pins.
- the extension of the clamping lever transverse to the longitudinal axis 2-2 in the horizontal direction is selected such that the clamping lever for the assembly and disassembly described in the free space 22 can be inserted and here in the direction of the longitudinal axis 2-2 is displaced and also for the production of Contact the contact surfaces 43 with the lateral surfaces 20, 21 is movable.
- the inner side surfaces of the legs 16, 17 form a guide for the clamping lever 35.
- FIG. 14 shows an embodiment of a compound of a clamping lever with a guide shoe; in which the legs 16a, 17a are not formed with bearing eyes. Rather, extending through legs 16a, 17a in the region of a transverse bore an axle body 50a, which may be formed, for example, as a bearing pin and is fixedly connected to the legs 16a, 17a, for example via a press-fitting.
- the clamping lever 35a has in its lower end portion in the region of the pivot axis 38a-38a a slot 52 into which can be inserted with an assembly of the axle 50a, wherein in an assembled position, a boundary of the slot 52 in the vertical direction a contact surface for forms the axle body 50a.
- a spring element shown as this also for in the Fig. 1 to 12 embodiment shown can be used.
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Abstract
Description
Die Erfindung betrifft eine Spannvorrichtung zum Festspannen eines Gegenstandes, beispielsweise eines Werkstückes, gegenüber einem Grundkörper, beispielsweise einem Spanntisch, gemäß dem Oberbegriff des Anspruchs 1. Eine solche Spannvorrichtung ist aus dem Dokument
Spannvorrichtungen der hier einschlägigen Art finden beispielsweise in Werk- oder Fertigungsstätten Einsatz, um ein Werkstück bei Aufbringung von Bearbeitungskräften gegenüber einem Grundkörper in einer definierten Lage zu halten. Ein beispielhafter weiterer Einsatzort von Spannvorrichtungen sind Prüflabore wie beispielsweise Schwingungslabore oder ähnliches. Ebenfalls möglich ist der Einsatz im Bereich einer Fertigung von Werkstücken, wobei beispielsweise eine Spritzform über eine Spannvorrichtung an einem Spanntisch festgespannt werden kann. Zusammenfassend ist die erfindungsgemäße Spannvorrichtung in beliebigen technischen Einsatzgebieten einsetzbar, in denen eine einfach bereitzustellende und lösbare Fixierung eines Gegenstandes gegenüber einem Grundkörper von Interesse ist, wobei eine extensive Auslegung der Begriffe "Gegenstand" sowie "Grundkörper" ohne eine zwingende Beschränkung derselben auf "Werkstücke" und einen "(Spann-)Tisch" erfolgen soll.Clamping devices of the kind relevant here are used, for example, in factories or manufacturing plants, in order to keep a workpiece in a defined position when machining forces are applied to a base body. An exemplary further use of tensioning devices are test laboratories, such as vibration laboratories or the like. Also possible is the use in the field of production of workpieces, for example, an injection mold can be clamped on a clamping device on a clamping table. In summary, the clamping device according to the invention can be used in any technical fields of application in which an easily provided and releasable fixation of an object with respect to a body of interest, with a broad interpretation of the terms "object" and "body" without a mandatory restriction of the same to "workpieces" and a "(clamping) table" should take place.
Hinsichtlich eines Aufbaus bekannter Spannvorrichtungen sind folgende Grundformen zu unterscheiden:With regard to a construction of known tensioning devices, the following basic forms are to be distinguished:
Für im Folgenden als "einteilige Bauform" bezeichnete Ausgestaltungen, s. bspw.
Für eine im Folgenden als "zweiteilige Bauform" bezeichnete Ausgestaltung, vgl. bspw.
Für eine im Folgenden als "dreiteilige Bauform" bezeichnete Ausgestaltungsform, s. bspw.
Selbstverständlich können die ein-, zwei- oder dreiteiligen Bauformen zusätzliche Bauteile aufweisen, ohne aus den zuvor erläuterten Grundbauformen hinauszufallen, wie beispielsweise Rückstellfedern, Lagerkörper, Schrauben, Stifte und ähnliches. Ebenfalls möglich sind zusätzliche Freiheitsgrade zwischen Grundkörper und Spannhebel.Of course, the one-, two- or three-part designs may have additional components, without falling out of the previously discussed basic designs, such as return springs, bearing body, screws, pins and the like. Also possible are additional degrees of freedom between body and clamping lever.
Weiterer Stand der Technik ist beispielsweise aus
Der Erfindung liegt die Aufgabe zugrunde, eine Spannvorrichtung vorzuschlagen, die hinsichtlich des Bauaufwandes, des Montageaufwandes und/oder des Demontageaufwandes sowie der mechanischen Beanspruchungen während des Einspannens verbessert ist.The invention has for its object to provide a clamping device, which is improved in terms of construction costs, the installation effort and / or the disassembly effort and the mechanical stresses during clamping.
Die Aufgabe der Erfindung wird erfindungsgemäß mit den Merkmalen des unabhängigen Patentanspruchs 1 gelöst. Weitere Ausgestaltungen der Erfindung ergeben sich entsprechend den abhängigen Ansprüchen 2 bis 12.The object of the invention is achieved with the features of
Erfindungsgemäß findet eine Spannvorrichtung dreiteiliger Bauart Einsatz mit einem Träger, einem Führungsschuh und einem Spannhebel, wobei nicht ausgeschlossen ist, dass weitere Bauelemente Einsatz finden, die auch zusätzliche Funktionen oder Freiheitsgrade gewährleisten können. Der Träger ist fest mit dem Grundkörper, beispielsweise einem Spanntisch, verbindbar und besitzt eine Anlagefläche, die eine Erstreckung in eine Längsrichtung aufweist. Der Einsatz eines derartigen Trägers hat den Vorteil, dass über eine Mehrzahl von Bohrungen, Langlöcher oder -nuten oder abweichende Verbindungsmittel vielfältige Verbindungsmöglichkeiten mit einem Spanntisch bereitgestellt werden können, die im Ergebnis dazu führen, dass die Spannvorrichtung an vielen Positionen und für vielfältige Ausrichtungsmöglichkeiten am Grundkörper befestigt werden kann. Andererseits stellt der Träger eine Anlagefläche bereit, im Bereich welcher der Träger mit dem Führungsschuh in Wirkverbindung tritt.According to the invention, a tensioning device of three-part design is used with a carrier, a guide shoe and a tensioning lever, wherein it is not excluded that other components are used which can also guarantee additional functions or degrees of freedom. The carrier is fixed to the main body, such as a clamping table, connectable and has a contact surface, which has an extension in a longitudinal direction. The use of such a carrier has the advantage that over a plurality of holes, slots or grooves or different connecting means diverse connection possibilities can be provided with a clamping table, which result in the fact that the clamping device in many positions and for a variety of alignment possibilities on the body can be attached. On the other hand, the carrier provides a contact surface in the area in which the carrier comes into operative connection with the guide shoe.
Der erfindungsgemäße Führungsschuh ist in Längsrichtung relativ gegenüber dem Träger, und damit auch gegenüber dem Grundkörper oder Spanntisch, verschieblich. Ein derartiger Verschiebe-Freiheitsgrad kann genutzt werden, um für bereits fixierten Träger eine weitere Anpassung der Position eines Spannhebels vorzusehen, beispielsweise eine Feinjustage oder eine Anpassung an unterschiedliche Geometrien oder Bearbeitungszustände eines festzuspannenden Werkstückes. Ebenfalls möglich ist eine zumindest temporäre Festsetzung des Freiheitsgrades zwischen Führungsschuh und Träger, beispielsweise über eine zwischen Führungsschuh und Träger wirkende Schraube, die einen Formschluss oder einen Reibschluss im Bereich ihrer Stirnseite der Schraube herbeiführen kann. Weiterhin denkbar ist der Einsatz einer Rastierung oder Verriegelung zwischen Führungsschuh und Träger zur Vorgabe oder Festlegung ausgewählter Positionen mit einem vorgegebenen Rastmaß unterschiedlicher Positionen in Richtung der Längsachse.The guide shoe according to the invention is displaceable in the longitudinal direction relative to the carrier, and thus also relative to the main body or clamping table. Such a shift degree of freedom can be used to provide a further adjustment of the position of a clamping lever for already fixed carrier, for example, a fine adjustment or adaptation to different geometries or processing states of a workpiece to be clamped. Also possible is an at least temporary fixing of the degree of freedom between the guide shoe and the carrier, for example via a screw acting between the guide shoe and the carrier, which can bring about positive engagement or frictional engagement in the region of its end face of the screw. It is also conceivable to use a detent or lock between the guide shoe and the carrier to specify or define selected positions with a predetermined detent dimension of different positions in the direction of the longitudinal axis.
Der Führungsschuh weist eine Gegenfläche auf, die zur Anlage an der Anlagefläche des Trägers kommt. Anlagefläche und Gegenfläche begrenzen eine Bewegung des Führungsschuhs in eine Richtung, die von dem Grundkörper weggerichtet ist, insbesondere in Richtung der Einspannung des Werkstückes. Weiterhin können Anlagefläche und Gegenfläche eine Führung für Bewegungen entsprechend dem zuvor erläuterten Freiheitsgrad bereitstellen. Ebenfalls möglich ist durch geeignete Ausbildung der Längserstreckung sowie Anordnung von Anlagefläche und Gegenfläche die eingangs angesprochene teleskopierbare Ausgestaltung von Führungsschuh und Träger. Über die Dimensionierung von Anlagefläche und Gegenfläche können weiterhin die wirkenden Flächenpressungen während eines Festspannens eines Werkstückes vorgegeben werden.The guide shoe has a counter surface, which comes to rest on the contact surface of the wearer. The contact surface and counter surface limit movement of the guide shoe in a direction which is directed away from the main body, in particular in the direction of the clamping of the workpiece. Furthermore, contact surface and counter surface can provide a guide for movements corresponding to the above-described degree of freedom. Also possible by suitable design of the longitudinal extent and arrangement of contact surface and counter surface, the above-mentioned telescopic design of guide shoe and carrier. About the dimensioning of contact surface and mating surface, the acting surface pressures during a clamping of a workpiece can be specified.
Eine Beaufschlagung des Spannhebels erfolgt über ein beliebiges Betätigungselement, welches im einfachsten Fall als manuell betätigte Schraube gemäß dem eingangs genannten Stand der Technik ausgebildet ist, wobei in alternativer beispielhafter Ausgestaltung auch der Einsatz eines Schwenkhebels gemäß einer aus
Erfindungsgemäß besitzt der Führungsschuh Schenkel, die den Träger seitlich umgreifen und einen nach innen abgewinkelten Endbereich besitzen. Diese Endbereiche bilden die Gegenflächen, die den Führungsschuh bei Belastungen im Zuge des Festspannens gegenüber dem Träger sichern und unter Umständen eine Führung bereitstellen. Diese Ausgestaltung der Erfindung nutzt die Erkenntnis aus, dass für ein seitliches Umgreifen eine gute Abstützung der Spannvorrichtung, insbesondere gegenüber einem Verkippen um die Längsachse, gegeben ist. Ursache hierfür ist, dass bei derartiger Ausgestaltung die Gegenflächen einen größeren Abstand von der Längsachse aufweisen als dies unter Umständen der Fall ist bei Abstützung eines etwaigen T-förmigen Endbereiches des Führungsschuhs entsprechend dem eingangs erläuterten Stand der Technik, der in eine T-Nut des Trägers eingreift. Somit können um die Längsachse wirkende Momente besser aufgenommen werden.According to the invention, the guide shoe has legs which laterally surround the carrier and have an inwardly angled end region. These end regions form the mating surfaces, which the guide shoe against stresses in the course of tightening Secure carrier and possibly provide a leadership. This embodiment of the invention utilizes the knowledge that for a lateral encompassing a good support of the clamping device, in particular against tilting about the longitudinal axis, is given. The reason for this is that in such an embodiment, the mating surfaces have a greater distance from the longitudinal axis than may be the case with support of any T-shaped end portion of the guide shoe according to the above-mentioned prior art, in a T-slot of the wearer intervenes. Thus, acting around the longitudinal axis moments can be better absorbed.
Andererseits hat die Erfindung erkannt, dass für ein erfindungsgemäßes seitliches Umgreifen des Trägers Ausgestaltungsformen, beispielsweise entsprechend
Für eine geradlinige Ausbildung der Schenkel zwischen dem Übergangsbereich von den Gegenflächen zu dem Abstützbereich des Achskörpers an den Schenkeln bedeutet dies, dass die Schenkel durch die Spannkraft vorrangig oder ausschließlich durch eine Zugkraft beansprucht werden, wodurch die zuvor erwähnten Probleme des Standes der Technik infolge auftretender Biegemomente beseitigt sind. Selbst für den Fall, dass die Schenkel gekrümmt oder gekröpft ausgebildet sind, kann ein auf den Schenkel wirkendes Biegemoment verringert werden, da der Hebelarm der Spannkraft in dem Schenkel dadurch verringert ist, dass der Seitenschenkel nicht "in eine Mitte" in Form eines zentralen Schenkels umgeleitet werden muss.For a rectilinear design of the legs between the transition region from the mating surfaces to the support region of the axle body to the legs, this means that the legs by the clamping force primarily or exclusively by a tensile force whereby the aforementioned problems of the prior art due to bending moments occurring are eliminated. Even in the case where the legs are curved or cranked, a bending moment acting on the leg can be reduced since the lever arm of the tension force in the leg is reduced because the side leg is not "centered" in the form of a central leg must be redirected.
Andererseits kann sich durch die erfindungsgemäße Ausgestaltung eine verringerte Dimensionierung, Baugröße und ein verringertes Gewicht der Spannvorrichtung ergeben, was allein darin begründet sein kann, dass die zuvor genannte "Umleitung" der Spannkraft zu einem mittleren zentralen Tragschenkel gemäß
Alternativ oder kumulativ zu den aufgeführten technischen Wirkungen von erfindungsgemäßen Merkmalen nutzt eine weitere Ausgestaltung der Erfindung die Erkenntnis aus, dass gemäß
Die Ermöglichung einer Entnahme der Baueinheit ermöglicht einen Austausch der Baueinheit für den Fall einer Beschädigung von Elementen derselben. Ebenfalls möglich ist der Austausch eines Spannhebels mit dessen Achskörper mit einem anderen Spannhebel mit zugeordnetem Achskörper, wobei der Spannhebel beispielsweise eine unterschiedliche Geometrie, Kröpfung und/oder Länge besitzen kann für abweichende Einsatzzwecke.Allowing removal of the assembly allows replacement of the assembly in the event of damage to elements thereof. Also possible is the replacement of a clamping lever with the axle body with another clamping lever with associated axle body, the clamping lever may have, for example, a different geometry, crank and / or length for different purposes.
Während ein Einsetzen eines Spannhebels und eines Achskörpers als eine Baueinheit unter Umständen auch für die aus
Für eine alternative Ausgestaltung der Erfindung bildet der Achskörper nicht mit dem Spannhebel eine Baueinheit, sondern vielmehr mit dem Führungsschuh, wodurch sich zu den zuvor erläuterten technischen Wirkungsweisen und Vorteilen entsprechende Wirkungen und Vorteile ergeben.For an alternative embodiment of the invention, the axle body does not form a structural unit with the tension lever, but rather with the guide shoe, resulting in corresponding effects and advantages for the above-described technical effects and advantages.
In den zuvor erläuterten Baueinheiten kann der Achskörper fest mit dem Führungsschuh bzw. dem Spannhebel verbunden sein oder aber verdrehbar gegenüber diesem gelagert sein. Ein Einsetzen und eine Entnahme der Baueinheit erfolgt vorzugsweise durch eine geeignete Ausnehmung oder Nut des Führungsschuhs, wobei diese Ausnehmung beispielsweise in Längsrichtung orientiert ist und quer zur Längsrichtung eine Erstreckung besitzt, die größer ist als die Länge des Achskörpers.In the above-described structural units, the axle body may be fixedly connected to the guide shoe or the tensioning lever, or may be mounted rotatably relative thereto. An insertion and removal of the assembly is preferably carried out by a suitable recess or groove of the guide shoe, which recess is oriented, for example, in the longitudinal direction and has an extension transverse to the longitudinal direction, which is greater than the length of the axle body.
Gemäß einer bevorzugten Ausgestaltung der Erfindung kann eine derartige Ausnehmung multifunktional genutzt werden, wenn diese einerseits dazu dient, die Baueinheit einzusetzen und/oder zu entnehmen, sowie andererseits dazu dient, in montiertem Zustand der Spannvorrichtung den Träger durch den Führungsschuh hindurchtreten zu lassen.According to a preferred embodiment of the invention, such a recess can be used multifunctional, if this serves on the one hand to use the unit and / or to remove, and on the other hand serves to let the carrier pass through the guide shoe in the assembled state of the tensioning device.
Wie zuvor erwähnt kann der sich erfindungsgemäß ergebende freie Bauraum zwischen Spannhebel und einer Oberseite des Trägers dazu genutzt werden, dass zwischen einer Unterseite des Spannhebels und einer Oberseite des Trägers eine Federelement angeordnet ist. Ein derartiges Federelement kann dazu dienen, ohne entsprechende Beaufschlagung durch das Betätigungselement den Spannhebel in eine Ausgangsstellung zu verschwenken, die insbesondere von dem einzuspannenden Werkstück weg gerichtet ist. Andererseits kann eine Federelement dazu dienen, den Achskörper an eine Mantelfläche eines Lagerauges anzupressen. Bei einem derartigen erfindungsgemäß eingesetzten Federelement kann es sich um ein beliebiges Federelement handeln, insbesondere eine um die Schwenkachse wirkende Torsionsfeder oder eine in die Umfangsrichtung des Spannhebels wirkende gerade oder gekrümmte Feder, ein elastomeres Federelement, ein Biegeelement oder ähnliches. Vorzugsweise ist die Rückstellfeder als eine Blattfeder ausgebildet aus einem Federstahl, die in einem Endbereich mit dem Führungsschuh verschraubt ist und in einem anderen Endbereich, ggf. unter Vorspannung, an dem Spannhebel anliegt oder umgekehrt. Zusätzlich kann die Blattfeder den Lagerkörper an die Mantelfläche des Lagerauges anpressen, beispielsweise in einem mittigen Bereich der Blattfeder.As mentioned above, the free space between the tensioning lever and an upper side of the carrier resulting from the invention can be used to arrange a spring element between an underside of the tensioning lever and an upper side of the carrier. Such a spring element can serve to pivot without appropriate action by the actuating element, the clamping lever in an initial position, which is directed in particular by the workpiece to be clamped away. On the other hand, a spring element can serve to press the axle body against a lateral surface of a bearing eye. Such a spring element used according to the invention may be any spring element, in particular a torsion spring acting about the pivot axis or a straight or curved spring acting in the circumferential direction of the tension lever, an elastomeric spring element, a bending element or the like. Preferably, the return spring is formed as a leaf spring made of a spring steel, which is screwed in one end region with the guide shoe and in another end region, possibly under bias, applied to the clamping lever or vice versa. In addition, the leaf spring can press the bearing body against the lateral surface of the bearing eye, for example in a central region of the leaf spring.
Da erfindungsgemäß freier Bauraum zwischen der Oberseite des Trägers und der Unterseite des Spannhebels gegeben sein kann, schlägt eine weitere Ausführungsform der erfindungsgemäßen Spannvorrichtung vor, dass zwischen der Unterseite des Spannhebels oder der Schwenkachse und einer Oberseite des Trägers ein Spalt gebildet ist, der kleiner ist als 1 cm, insbesondere kleiner ist als 0,5 cm, beispielsweise kleiner als 0,3 cm . Hierdurch kann die Bauhöhe der Spannvorrichtung zumindest im Bereich der Schwenkachse deutlich gegenüber den aus dem Stand der Technik bekannten Ausführungsformen reduziert werden. Unter Umständen zieht eine derartige Verringerung der Bauhöhe im Bereich der Schwenkachse auch eine Verringerung der Bauhöhe im Bereich des Betätigungselementes nach sich, was eine verbesserte Bedienung des Betätigungselementes bedingt und die Dimensionierung des Betätigungselementes und damit dessen Steifigkeit verringern kann.Since according to the invention free space between the top of the carrier and the underside of the clamping lever can be given, proposes a further embodiment of the clamping device according to the invention that between the underside of the clamping lever or the pivot axis and an upper side of the carrier, a gap is formed, which is smaller than 1 cm, in particular less than 0.5 cm, for example less than 0.3 cm. As a result, the overall height of the tensioning device, at least in the region of the pivot axis, can be reduced significantly compared to the embodiments known from the prior art. Under certain circumstances, such a reduction of the overall height in the region of the pivot axis also entails a reduction in the overall height in the region of the actuating element, which may result in improved operation of the actuating element and may reduce the dimensioning of the actuating element and thus its rigidity.
Für eine weitere erfindungsgemäße Ausgestaltung besitzt der Spannhebel zwei beidseitig des Spannhebels angeordnete Fortsätze, die den Achskörper bilden. Diese können beispielsweise mit dem Spannhebel verschweißt sein oder über eine Presspassung in eine geeignete Bohrung des Spannhebels eingeführt sein. Die Fortsätze können dann an einer Mantelfläche eines Lagerauges gelagert sein.For a further embodiment of the invention, the clamping lever has two extensions arranged on both sides of the clamping lever, which form the axle body. These may for example be welded to the clamping lever or be introduced via a press fit into a suitable bore of the clamping lever. The extensions can then be mounted on a lateral surface of a bearing eye.
Für den Fall, dass die Fortsätze eine zumindest teilzylinderförmige Mantelfläche aufweisen, kann es vorteilhaft sein, wenn diese zur Bildung einer Schwenklagerung jeweils zur Anlage an eine zumindest teilzylinderförmige Mantelfläche eines Lagerauges kommen. Somit ergibt sich eine großflächige, teilzylinderförmige Kontaktfläche zwischen den Fortsätzen und dem Lagerauge, wodurch eine gute Führung während der Schwenkbewegung sowie eine vorteilhafte Krafteinleitung sowohl in die Fortsätze als auch in das Lagerauge gegeben ist.In the event that the extensions have an at least partially cylindrical surface, it may be advantageous if they come to form a pivot bearing each for abutment against an at least partially cylindrical lateral surface of a bearing eye. This results in a large, partially cylindrical contact surface between the extensions and the bearing eye, whereby a good guide during pivotal movement and an advantageous force is applied both in the extensions and in the bearing eye.
Für eine alternative Ausgestaltung kann gemäß
Eine verbesserte Führung des Führungsschuhs gegenüber dem Träger kann sich ergeben, wenn der Träger eine seitliche, in Richtung der Längsachse orientierte Nut aufweist, in der Stege des Schenkels quer zu der Längsachse geführt sind. Eine derartige Führung kann beispielsweise mit beiden Richtungssinnen in Richtung der Spannkraft erfolgen, so dass einerseits die Bewegung des Führungsschuhs weg von dem Grundkörper vermieden ist, wozu eine Begrenzung der Nut die Anlagefläche bildet. Andererseits gibt die gegenüberliegende Begrenzungsfläche der Nut die Position des Führungsschuhs in Richtung nach unten vor für den Fall, dass der Führungsschuh nicht mit Spannkräften beaufschlagt ist. Ebenfalls möglich ist, dass durch den Boden der Nut eine Führung in einer horizontalen Ebene und quer zur Längsachse der Spannvorrichtung erfolgt.An improved guidance of the guide shoe relative to the carrier may result if the carrier has a lateral, oriented in the direction of the longitudinal axis groove, are guided in the webs of the leg transverse to the longitudinal axis. Such a guide can be done, for example, with both directional senses in the direction of the clamping force, so that on the one hand the movement of the guide shoe away from the base body is avoided, including a boundary of the groove forms the contact surface. On the other hand, the opposite boundary surface of the groove, the position of the guide shoe in the downward direction before in the event that the guide shoe is not subjected to clamping forces. It is also possible that through the bottom of the groove a guide in a horizontal plane and transverse to the longitudinal axis of the tensioning device takes place.
Während der Spannhebel besonders einfach integral mit den Fortsätzen als ein Gussteil hergestellt werden kann, hat die Erfindung weiterhin erkannt, dass es möglich ist, den Träger und/oder den Führungsschuh in einem Strangpressverfahren, ggf. mit spanender Nachbearbeitung, herzustellen.While the tensioning lever can be produced particularly easily integrally with the extensions as a casting, the invention has further recognized that it is possible to manufacture the carrier and / or the guide shoe in an extrusion process, possibly with machining finishing.
Eine vereinfachte Bedienung der Spannvorrichtung ergibt sich, wenn sowohl das Betätigungselement als auch das Befestigungselement für die Befestigung des Trägers an dem Grundkörper Betätigungsflächen für dasselbe Werkzeug aufweisen. Beispielsweise kann das Betätigungselement als Schraube mit einem Innensechskant ausgebildet sein, dessen Durchmesser dem Durchmesser eines Innensechskantes für Befestigungsschrauben des Trägers an dem Spanntisch entspricht.A simplified operation of the clamping device results when both the actuating element and the fastening element for the attachment of the carrier to the base body have actuating surfaces for the same tool. For example, the actuator may be formed as a screw with a hexagon whose diameter corresponds to the diameter of a hexagon socket for mounting screws of the carrier to the clamping table.
Ein weiterer Vorschlag der Erfindung betrifft die Ausgestaltung des Trägers. Für den hier vorliegenden Fall eines dreiteiligen Bauteils schlägt die Erfindung vor, den Träger zumindest über einen Teil seiner Längserstreckung mit einem Doppel-T-Querschnitt auszubilden, wobei der Doppel-T-Querschnitt automatisch eine Nut bildet, die in dem zuvor erläuterten Sinne genutzt werden kann. Weiterhin kann durch Einsatz des Doppel-T-Querschnittes das Flächenträgheitsmoment des Trägers erhöht werden, wodurch unerwünschte Durchbiegungen des Trägers reduziert werden können. Darüber hinaus stellt das unten liegende, umgekehrte T eine gegenüber dem Stand der Technik verbreiterte Auflagefläche des Trägers an dem Spanntisch bereit, so dass eine gute Abstützung und Momentaufnahme gegeben ist.Another proposal of the invention relates to the design of the carrier. For the present case of a three-part component, the invention proposes to form the carrier at least over a part of its longitudinal extent with a double-T-section, wherein the double-T-section automatically forms a groove, which are used in the sense explained above can. Furthermore, by using the double-T cross section, the area moment of inertia of the carrier can be increased, whereby unwanted deflections of the carrier can be reduced. In addition, the underlying, reverse T provides a widened compared to the prior art supporting surface of the carrier on the clamping table, so that a good support and snapshot is given.
Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Patentansprüchen, der Beschreibung und den Zeichnungen. Die in der Beschreibungseinleitung genannten Vorteile von Merkmalen und von Kombinationen mehrerer Merkmale sind lediglich beispielhaft und können alternativ oder kumulativ zur Wirkung kommen, ohne dass die Vorteile zwingend von erfindungsgemäßen Ausführungsformen erzielt werden müssen. Weitere Merkmale sind den Zeichnungen - insbesondere den dargestellten Geometrien und den relativen Abmessungen mehrerer Bauteile zueinander sowie deren relativer Anordnung und Wirkverbindung - zu entnehmen. Die Kombination von Merkmalen unterschiedlicher Ausführungsformen der Erfindung oder von Merkmalen unterschiedlicher Patentansprüche ist ebenfalls abweichend von den gewählten Rückbeziehungen der Patentansprüche möglich und wird hiermit angeregt. Dies betrifft auch solche Merkmale, die in separaten Zeichnungen dargestellt sind oder bei deren Beschreibung genannt werden. Diese Merkmale können auch mit Merkmalen unterschiedlicher Patentansprüche kombiniert werden. Ebenso können in den Patentansprüchen aufgeführte Merkmale für weitere Ausführungsformen der Erfindung entfallen.Advantageous developments of the invention will become apparent from the claims, the description and the drawings. The advantages of features and combinations of several features mentioned in the introduction to the description are merely exemplary and may be effective as an alternative or cumulatively without the advantages necessarily being achieved by embodiments according to the invention. Further features are the drawings - in particular the illustrated geometries and the relative dimensions of several components to each other and their relative arrangement and operative connection - refer. The combination of features of different embodiments of the invention or of features of different claims is also possible deviating from the chosen relationships of the claims and is hereby stimulated. This also applies to those features which are shown in separate drawings or are mentioned in their description. These features can also vary with features Claims are combined. Likewise, in the claims listed features for further embodiments of the invention can be omitted.
Im Folgenden wird die Erfindung anhand in den Figuren dargestellter bevorzugter Ausführungsbeispiele weiter erläutert und beschrieben.
- Fig. 1
- zeigt einen Träger einer Spannvorrichtung in einer teilgeschnittenen Seitenansicht.
- Fig. 2
- zeigt den Träger gemäß
Fig 1 in einem Querschnitt II-II. - Fig. 3
- zeigt einen Führungsschuh einer Spannvorrichtung in einem Halblängsschnitt III- III.
- Fig. 4
- zeigt den Führungsschuh gemäß
Fig. 3 in einem Querschnitt IV-IV. - Fig. 5
- zeigt den Führungsschuh gemäß
Fig. 3 und 4 in einem Horizontalschnitt V-V. - Fig. 6
- zeigt den Führungsschuh gemäß den
Fig. 3 bis 5 in einer Draufsicht. - Fig. 7
- zeigt einen Spannhebel einer Spannvorrichtung in einer Seitenansicht.
- Fig. 8
- zeigt den Spannhebel gemäß
Fig. 7 in einem Querschnitt VIII-VIII. - Fig. 9
- zeigt den Spannhebel gemäß
Fig. 7 und 8 in einer teilgeschnittenen Draufsicht. - Fig. 10
- zeigt eine Spannvorrichtung mit einem Träger, einem Führungsschuh und einem Spannhebel in montiertem Zustand in einer Seitenansicht.
- Fig. 11
- zeigt die Spannvorrichtung gemäß
Fig. 10 in einem Querschnitt XI-XI. - Fig. 12
- zeigt die Spannvorrichtung gemäß
Fig. 10 und11 in einer Draufsicht. - Fig. 13
- zeigt ein Kontaktelement für einen Einsatz im Kontaktbereich zwischen Spannhebel und Werkstück in einem Querschnitt XIII-XIII.
- Fig. 14
- zeigt eine Ausgestaltung einer Verbindung eines Spannhebels mit einem Führungsschuh.
- Fig. 1
- shows a carrier of a tensioning device in a partially sectioned side view.
- Fig. 2
- shows the carrier according to
Fig. 1 in a cross section II-II. - Fig. 3
- shows a guide shoe of a tensioning device in a semi-longitudinal section III-III.
- Fig. 4
- shows the guide shoe according to
Fig. 3 in a cross section IV-IV. - Fig. 5
- shows the guide shoe according to
3 and 4 in a horizontal section VV. - Fig. 6
- shows the guide shoe according to the
Fig. 3 to 5 in a top view. - Fig. 7
- shows a clamping lever of a clamping device in a side view.
- Fig. 8
- shows the cocking lever according to
Fig. 7 in a cross-section VIII-VIII. - Fig. 9
- shows the cocking lever according to
FIGS. 7 and 8 in a partially sectioned plan view. - Fig. 10
- shows a clamping device with a carrier, a guide shoe and a clamping lever in the assembled state in a side view.
- Fig. 11
- shows the tensioning device according to
Fig. 10 in a cross section XI-XI. - Fig. 12
- shows the tensioning device according to
Fig. 10 and11 in a top view. - Fig. 13
- shows a contact element for use in the contact region between clamping lever and workpiece in a cross section XIII-XIII.
- Fig. 14
- shows an embodiment of a compound of a clamping lever with a guide shoe.
Der Führungsschuh 14 ist im Wesentlichen symmetrisch zu einer vertikalen Längsmittelachse ausgebildet und verfügt über eine in den Ansichten gemäß
Unterhalb der Platte 15 bildet der Führungsschuh eine T-förmige Nut 25 mit einer von dem Querschenkel des T gebildeten Ausnehmung 45. Die Nut 25 ist nach unten offen und in Richtung der Längsachse 2 orientiert. Die Schenkel 16, 17 besitzen in den unteren Endbereichen radial nach innen abgewinkelte Stege 26, 27, deren Oberseiten Gegenflächen 28, 29 bilden, mit denen die Ausnehmung 45 begrenzt ist. Der Querschnitt der Nut 25 ist korrespondierend zu dem Querschnitt des oberen T des Trägers 1 ausgebildet, so dass der Träger 1 in die Nut 25 eingeführt werden kann, wobei die Schenkel 16, 17 mit den unteren Bereichen seitlich die obere Hälfte des Trägers 1 umgreifen und die Stege 27, 26 in die Nuten 5, 6 eintreten. Eine horizontale Führung quer zur Längsachse 2 kann gegeben sein durch Anlage der innenliegenden Stirnflächen der Stege 26, 27 an dem Boden 8 der Nuten 5, 6 oder der Seitenflächen des Bereiches des Trägers 1 an den Innenflächen der Schenkel 16, 17. Eine Abstützung des Führungsschuhs 14 nach unten kann durch Anlage der Unterseite der Platte 15 an die Oberseite 13 des Trägers 1 gegeben sein oder durch Anlage der Unterseite der Stege 26, 27 an die Anlagefläche 12 der Nuten 5, 6. Eine Bewegung des Führungsschuhs 14 gegenüber dem Träger 1 nach oben ist dadurch vermieden, dass die Gegenflächen 28, 29 zur Anlage an die Anlageflächen 11, 12 kommen.Below the
Im Bereich der Unterseite der Platte 15 ist eine Ausnehmung 30 oder Ausfräsung vorgesehen, im Bereich welcher ein in den Figuren nicht dargestelltes Federelement mit dem Führungsschuh 14 verbunden sein kann, wozu der Führungsschuh 14 im Bereich der Ausnehmung 30 eine vertikal orientierte durchgehende Gewindebohrung 31 besitzt, in die eine geeignete Schraube zur Befestigung des Federelementes an dem Führungsschuh 14 einschraubbar ist. Ein derartiges Federelement drückt beispielsweise den Führungsschuh nach oben, so dass die Gegenflächen 28, 29 zur Anlage an den Anlageflächen 12 kommen.In the area of the underside of the
Im unteren Endbereich des Steges 27 besitzt dieser eine in Richtung der Längsachse 2-2 orientierte Ausnehmung oder Ausfräsung 32, die mit einer Anschlagfläche 33 endet. Ein Verschiebe-Freiheitsgrad des Führungsschuhs 14 gegenüber dem Träger 1 in Richtung der Längsachse 2-2 wird dadurch begrenzt, dass ein in der Bohrung 34 angeordneter Stift, der nicht zwingend aus der Nut 5 über die Seitenflächen des Trägers 1 herausstehen muss, zur Anlage an die Anschlagfläche 33 kommt. Durch die Bereitstellung der Ausnehmung 32 mit Anschlagfläche 33 kann ein "Teleskopieren" des Führungsschuhs ermöglicht werden.In the lower end region of the
In
Die Schenkel 36, 37 des Spannhebels 35 können je nach den Krafterfordernissen und den zurückzulegenden Wegen im Zuge einer Verspannung eines Werkstückes gleiche oder unterschiedliche Längen aufweisen und, wie aus
Eine Erstreckung der in Richtung der Längsachse 2-2 orientierten Ausnehmung 45 der Nut 25 des Führungsschuhs 14 in Querrichtung ist größer gewählt als der Abstand der außen liegenden Stirnseiten der Fortsätze 41, 42. Weiterhin ist die Erstreckung der Ausnehmung 45 in vertikaler Richtung größer als die Abmessung der Fortsätze 41, 42 in vertikaler Richtung. Dies hat zur Folge, dass es möglich ist, eine mit dem Spannhebel 35 und den Fortsätzen 41, 42 gebildete Baueinheit 51 durch die Ausnehmung 45 zwischen die Schenkel 16, 17 des Führungsschuhs 14 einzuführen und in einem Übergangsbereich von der Ausnehmung 45 zu den Lageraugen 18, 19 zu bringen, von wo die Anlageflächen 43 der Fortsätze 41, 42 in Kontakt mit den gekrümmten Mantelflächen 20, 21 der Lageraugen 18, 19 gebracht werden und beispielsweise über das Federelement in Kontakt mit diesen gehalten werden. Während des Einführens kann es daher erforderlich sein, dass Federelement vorzuspannen. Die Einführung der Fortsätze in die Lageraugen 18, 19 erfolgt damit zunächst in einer Bewegung in Längsrichtung der Längsachse 2-2 und dann durch Bewegung nach oben in Richtung der Mantelflächen 20, 21. Eine Demontage ist in Folge der Krümmung der Mantelflächen 20, 21 ebenfalls nur durch eine Bewegung der Fortsätze 41, 42 nach unten möglich, was eine Bewegung entgegen der Spannrichtung bedeuten würde und mit einer zusätzlichen Beaufschlagung des Federelementes einhergehen kann.An extension of the oriented in the direction of the longitudinal axis 2-2
Nach einer derartigen Vormontage des Spannhebels 35 in dem Führungsschuh 14 kann der Führungsschuh in Richtung der Längsachse 2-2 auf den Träger 1 aufgeschoben werden, wobei der Träger 1 in die Nut 25 des Führungsschuhs 14 eintritt. Da der Träger 1 zumindest teilweise die Ausnehmung 45 der Nut 25 ausfüllt, kann der Spannhebel 45 nun nicht mehr aus dem Führungsschuh 14 beabsichtigt oder unbeabsichtigt entfernt werden, solange der Träger 1 in dem Führungsschuh 14 angeordnet ist.After such pre-assembly of the clamping
In die Gewindebohrung 40 ist ein Gewindebolzen 46 eingeschraubt, der in seinem dem Grundkörper 4 zugewandten Endbereich einen Kugelkopf 47 trägt mit einem Anlageteller 48 mit unter Umständen vergrößertem Querschnitt. Mit dem Einschrauben des Gewindebolzens 46 in die Gewindebohrung 40 kommt der Anlageteller 48 zur Anlage an die Oberseite der Platte 15. Mit zunehmender Verspannung eines Werkstückes wird eine zunehmende Axialkraft in dem Gewindebolzen 46 erzeugt, die auf den Spannhebel 35 wirkt und ein entgegen dem Uhrzeigersinn orientiertes Moment um die Schwenkachse 38 erzeugt, welche geneigt ist, den freien Endbereich des Schenkels 36 in Richtung des Grundkörpers 4 zu pressen, wodurch zwischen Grundkörper und diesem Endbereich ein Werkstück eingespannt werden kann. Zur Bereitstellung einer definierten Anlagefläche, auch für unterschiedliche Schwenkwinkel des Spannhebels 35, kann der vorgenannte Endbereich ein im Wesentlichen U-förmiges Anpresselement 49 besitzen, vgl.
Die Erstreckung des Spannhebels quer zu der Längsachse 2-2 in horizontaler Richtung ist derart gewählt, dass der Spannhebel für die beschriebene Montage und Demontage in den Freiraum 22 eingeführt werden kann und hier in Richtung der Längsachse 2-2 verschiebbar ist sowie auch zur Herstellung des Kontaktes der Anlageflächen 43 mit den Mantelflächen 20, 21 beweglich ist. In der Montagestellung können die innen liegenden Seitenflächen der Schenkel 16, 17 eine Führung für den Spannhebel 35 bilden.The extension of the clamping lever transverse to the longitudinal axis 2-2 in the horizontal direction is selected such that the clamping lever for the assembly and disassembly described in the
- 11
- Trägercarrier
- 22
- Längsachselongitudinal axis
- 33
- DurchgangsbohrungenThrough holes
- 44
- Grundkörperbody
- 55
- Nutgroove
- 66
- Nutgroove
- 77
- Grundschenkelbase leg
- 88th
- Bodenground
- 99
- Seitenschenkelside leg
- 1010
- Seitenschenkelside leg
- 1111
- Anlageflächecontact surface
- 1212
- Anlageflächecontact surface
- 1313
- Oberseitetop
- 1414
- Führungsschuhguide shoe
- 1515
- Platteplate
- 1616
- Schenkelleg
- 1717
- Schenkelleg
- 1818
- Lageraugebearing eye
- 1919
- Lageraugebearing eye
- 2020
- Mantelflächelateral surface
- 2121
- Mantelflächelateral surface
- 2222
- Freiraumfree space
- 2323
- Innenseiteinside
- 2424
- Innenseiteinside
- 2525
- Nutgroove
- 2626
- Stegweb
- 2727
- Stegweb
- 2828
- Gegenflächecounter surface
- 2929
- Gegenflächecounter surface
- 3030
- Ausnehmungrecess
- 3131
- Gewindebohrungthreaded hole
- 3232
- Ausnehmungrecess
- 3333
- Anschlagflächestop surface
- 3434
- Bohrungdrilling
- 3535
- Spannhebelclamping lever
- 3636
- Schenkelleg
- 3737
- Schenkelleg
- 3838
- Schwenkachseswivel axis
- 3939
- Bohrungdrilling
- 4040
- Gewindebohrungthreaded hole
- 4141
- Fortsatzextension
- 4242
- Fortsatzextension
- 4343
- Anlageflächecontact surface
- 4444
- Befestigungsschraubefixing screw
- 4545
- Ausnehmungrecess
- 4646
- Gewindebolzenthreaded bolt
- 4747
- Kugelkopfball head
- 4848
- Anlagetellercontact plate
- 4949
- Anpressplattepressure plate
- 5050
- Achskörperaxle body
- 5151
- Baueinheitunit
- 5252
- Schlitzslot
- 5454
- Spannvorrichtungjig
Claims (12)
- Device for chucking an object against a base body (4), the device having
a supporting element (1) designed and arranged for being fixedly linked with the base body and comprising a contact surface (11) having an extension along a longitudinal axis (2-2),
a guide shoe (14) comprising a counter contact surface (28, 29) contacting the contact surface (11) for limiting a movement of the guide shoe (14) away from the base body (4) and a chucking lever (35) which is pivotably linked with the guide shoe (14) for a pivoting movement around a pivoting axis (38) having an orientation transverse to the longitudinal axis (2-2), wherein the chucking lever (35) comprises a chucking surface (49) for chucking the object with a chucking force between the chucking surface (49) and the base body (4) and comprises an activating element, wherein the amount of activation of the activating element correlates with the pivoting movement of the chucking lever (35) and/or the change of the chucking force,
wherein the guide shoe (14) comprises legs (16, 17) and one end region of the legs (16, 17) extends to or beyond the pivoting axis (38) and laterally of the chucking lever (35),
characterized by
the legs in the opposite end region laterally encompassing, surrounding or gripping the supporting element (1), the legs (16, 17) each building one of the counter contact surfaces (28, 29) in an end region angled in inner direction,
the guide shoe (14) being displaceable or slidable during the use of the device for chucking along the longitudinal axis (2-2) relative to the base body (4),
the chucking lever (35) and a pivot body (50) building an assembly unit wherein the assembly unit is designed and arranged for being inserted in a pivot lug (18, 19) and removed from the pivot lug (18, 19) without disassembling the assembly unit and
the guide shoe (14) comprising a recess with an orientation along the longitudinal axis (2-2), wherein the recess is used for inserting and removing the assembly unit and wherein in the assembled state of the device for chucking (54) the supporting element (1) extends through the recess (45). - Device according to claim 1, wherein a return spring is interposed between a lower surface of the chucking lever (35) and an upper surface of the supporting element (1).
- Device according to claim 1 or 2, wherein a gap built between a lower surface of the chucking lever (35) or the pivoting axis (38) and an upper surface of the supporting element (1) is smaller than 1 cm.
- Device according to one of claims 1 to 3, wherein the chucking lever (35) comprises two protrusions (41, 42) located at both sides of the chucking lever (35) wherein the protrusions (41,42) have an orientation along the pivoting axis (38), build the pivot body (50) and are each located in a pivot lug (18, 19) of a leg (17, 18).
- Device according to claim 4, wherein the protrusions (41, 42) each comprise contact surfaces (43) used for building a pivoting link by contacting a surface (20, 21) of a pivot lug (18, 19).
- Device according to claim 4 or 5, wherein the protrusions (41, 42) are built as one single cast or forged part with the chucking lever (35).
- Device according to one of claims 1 to 6, wherein the supporting element (1) comprises lateral grooves or slots (5, 6) having an extension along the longitudinal axis (2-2), wherein webs (26, 27) of the legs (17, 18) are guided transverse to the longitudinal axis (2-2).
- Device according to claim 7, wherein at least one end stop element (33) is provided for a movement of the guide shoe (14) along the longitudinal axis (2-2) in the groove or slot (5, 6).
- Device according to one of claims 1 to 8, wherein the supporting element (1) is extruded and/or the guide shoe (14) is manufactured by forging or casting.
- Device according to one of claims 1 to 9, wherein the activating element (46) and a fixing element (44) for fixing the supporting element (1) at the base body (4) comprise activating surfaces for one and the same tool.
- Device according to one of claims 1 to 10, wherein the supporting element (1) is built at least over one part of its extension along the longitudinal axis (2-2) with a double-T-cross-section.
- Device according to one of claims 1 to 11, wherein the supporting element (1) comprises slots or elongated holes extending along the longitudinal axis (2-2).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006015855A DE102006015855A1 (en) | 2006-04-03 | 2006-04-03 | jig |
PCT/EP2007/002374 WO2007115640A1 (en) | 2006-04-03 | 2007-03-17 | Clamping device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2001638A1 EP2001638A1 (en) | 2008-12-17 |
EP2001638B1 true EP2001638B1 (en) | 2009-06-17 |
Family
ID=38226512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07711972A Active EP2001638B1 (en) | 2006-04-03 | 2007-03-17 | Clamping device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2001638B1 (en) |
AT (1) | ATE433833T1 (en) |
DE (2) | DE102006015855A1 (en) |
WO (1) | WO2007115640A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202016102855U1 (en) | 2015-10-29 | 2016-06-13 | Lenzkes Spanntechnik GmbH | Fixing chain tensioner |
DE202017107175U1 (en) | 2017-02-08 | 2017-12-15 | Lenzkes Spanntechnik GmbH | Clamping tool and clamping tool bearing body part |
EP3360646A1 (en) | 2017-02-08 | 2018-08-15 | Lenzkes Spanntechnik GmbH | Tightening tool and tightening tool bearing part |
DE202019100296U1 (en) | 2019-01-18 | 2020-04-23 | ALTRATEC Automation GmbH | Clamping device, in particular for clamping workpieces |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202016103097U1 (en) | 2016-06-10 | 2016-06-23 | Lenzkes Spanntechnik GmbH | clamping tool |
EP3254808B1 (en) | 2016-06-10 | 2021-03-31 | Lenzkes Spanntechnik GmbH | Clamping tool and bearing slide for a clamping tool |
CN110682130A (en) * | 2019-10-24 | 2020-01-14 | 上海沪东造船柴油机配套有限公司 | No lug diesel engine frame < shape frock clamp for lifting by crane instrument processing |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1490063A (en) * | 1923-04-10 | 1924-04-08 | Walter S Tower | Machinist's clamp |
FR2463408A2 (en) * | 1972-01-28 | 1981-02-20 | Carossino Andre | Mechanically operated machine tool clamp - has clamping arm rotated by rotation of tangential screw on casing |
CH597976A5 (en) * | 1975-09-02 | 1978-04-14 | Paul Feusi | Machine tool workpiece holder with support and clamp |
DE59002875D1 (en) * | 1989-04-04 | 1993-11-04 | Lenzkes Karl Heinz | CLAMPING DEVICE FOR CLAMPING A WORKPIECE ON A CLAMPING TABLE. |
DE8904096U1 (en) * | 1989-04-04 | 1990-08-02 | Lenzkes, Karl-Heinz, 5990 Altena | Clamping device for clamping tables |
DE4442803C1 (en) * | 1994-12-01 | 1996-01-04 | Shanview Patents Ltd | Device for clamping workpiece on table |
FR2767730B1 (en) * | 1997-09-03 | 1999-10-29 | Patricia Carossino | VERTICAL CLAMPING DEVICE WITH HIGH APPLICATION FORCE |
-
2006
- 2006-04-03 DE DE102006015855A patent/DE102006015855A1/en not_active Withdrawn
-
2007
- 2007-03-17 DE DE502007000906T patent/DE502007000906D1/en active Active
- 2007-03-17 EP EP07711972A patent/EP2001638B1/en active Active
- 2007-03-17 AT AT07711972T patent/ATE433833T1/en active
- 2007-03-17 WO PCT/EP2007/002374 patent/WO2007115640A1/en active Application Filing
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202016102855U1 (en) | 2015-10-29 | 2016-06-13 | Lenzkes Spanntechnik GmbH | Fixing chain tensioner |
EP3162503A1 (en) | 2015-10-29 | 2017-05-03 | Lenzkes Spanntechnik GmbH | Chain tensioning device |
DE202017107175U1 (en) | 2017-02-08 | 2017-12-15 | Lenzkes Spanntechnik GmbH | Clamping tool and clamping tool bearing body part |
EP3360646A1 (en) | 2017-02-08 | 2018-08-15 | Lenzkes Spanntechnik GmbH | Tightening tool and tightening tool bearing part |
DE202019100296U1 (en) | 2019-01-18 | 2020-04-23 | ALTRATEC Automation GmbH | Clamping device, in particular for clamping workpieces |
Also Published As
Publication number | Publication date |
---|---|
WO2007115640A1 (en) | 2007-10-18 |
ATE433833T1 (en) | 2009-07-15 |
DE502007000906D1 (en) | 2009-07-30 |
EP2001638A1 (en) | 2008-12-17 |
DE102006015855A1 (en) | 2007-10-18 |
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