DE202009001062U1 - Toggle clamping device, in particular for use in the bodywork of the automotive industry - Google Patents

Abstract

Toggle clamping device, in particular for use in the bodywork of the automotive industry, for clamping, clinching, welding, gluing or the like, with a motor via a toggle joint pivotally driven clamping arm (4), wherein the clamping arm (4) and / or on the jaw (6) Preferably, a contour body holder (7, 8) or a magazine are arranged interchangeably with a plurality of contour bodies, each in pairs in suitable clamping or working positions movable and locked in the respective desired position, wherein the contour body holder or magazines (7, 8) for the respective contoured body on the jaw (6) and / or on the clamping arm (4) in the mating position gradually by an actuating device driven by a motor and locked in the respective desired position to each other, characterized in that the drive of the relevant contour body holder or the magazine (7, 8) by one or by a plurality of motor-driven switch plunger (23, 24, 40) is vornehmbar that their respective stroke on the respective rotatable contour body holder or magazine (7, 8) or a drive shaft (20, 50) ...

Description

The Innovation relates to a toggle lever device, in particular for Use in the bodywork of the automotive industry, for clamping, clinching, welding, Gluing or the like, with a motor over a Toggle joint assembly pivotally driven tensioning arm, wherein on the clamping arm and / or on the jaw preferably a contour body holder or a magazine with several contour bodies interchangeable arranged in pairs in matching clamping or working positions movable and in the respectively desired Position can be locked, the contour body holder or the magazines for the relevant contoured body on the jaw and / or on the clamping arm in the respectively matching position gradually by an actuator motor drivable and in the respective desired position to each other can be locked.

State of the art

A Such toggle clamping device is by the Applicant Returning utility model 20 2008 009 702.9 previously known. This utility model describes a toggle clamping device, in which on both the clamping arm and the jaw several contoured body are arranged interchangeably, in pairs to each other in matching Clamping position movable and in the respectively desired Position are arranged lockable. For this purpose can Magazine be provided in the form of revolver magazines. Both that The clamping arm magazine as well as the jaw magazine are each powered by a motor Rotary drive or stepper motor driven. These rotary actuators can Electric motors or hydraulic motors, in case of need also pneumatic motors be. The drive motors designed as stepping motors can each having a drive roller and a drive groove, in each of which Engage locking bolt or roller bolt, which in the respectively desired Ready position or clamping position lockable in the gangway are. In one of these known types are in the magazine of the clamping arm or the jaw each two different contoured body arranged interchangeably, in case of need also three or four different Contour the body. The rotary actuators or stepper motors are in their respective clamping position positive or non-positive lockable. This lock can be in the respectively desired Position by at least one example controllable locking element respectively. The locking element is a bolt or bolt, the in a recess of a stationary part of the respective clamping arm and / or Kiefers intervenes. The bolt or bolt is alternately through one on both sides by pressure medium pressure, in particular by a compressed air to be acted piston-cylinder unit, adjustable, the Piston rod preferably forms the bolt or the bolt.

Toggle clamping devices The presupposed genus includes many to the state of the art. Usual toggle clamps are pneumatically driven, with a longitudinally displaceable in a cylinder and sealingly guided piston alternately on both sides Pressure medium pressure, in particular by compressed air, is acted upon and about a piston rod and a so in a chuck arranged toggle joint arrangement one about a fixed pivot axis arranged clamping arm by a predetermined angular range and pivotable, ie between a clamping position and a release position, drives. The clamping arm is usually a so-called contour piece associated with a contour piece of an abutment, Called jaw, cooperates. Between the two contour pieces becomes the exciting component / workpiece, usually body panels, trapped until the components concerned permanently, for example by gluing, clinching, spot welding or the like are connected.

tolerances At the contour pieces are by tuning plates, shims called, balanced.

in the Body shop of the automotive industry are increasingly being several models or model variants are produced on a production line. For The clamping technology comes for every model variant, the means for each component variation, a set of contour pieces for the tension arm and the jaws of the toggle clamps for use. This means that when switching from exciting to Components / workpieces the production line first stopped, the contour pieces removed by hand, new Contour pieces installed, precisely tuned by Shims and then the production line has to be restarted. This results relatively big dead times, which affect the production costs affect negatively.

By declaring to the applicant utility model 20 2008 009 702.9 a pair of matching pairs contour pieces are provided both on the clamping arm and on the jaw, depending on the exciting part / workpiece to each other movable and thus in the appropriate position in a clamping of components can take place can be brought to each other. This mobility can be done by swivel or rotary movements by hand or by motor, although the cumbersome removal and transport of contoured bodies to the respective clamping arms of existing in a production line toggle lever jigs and the abutments (jaw) is avoided, since each required contour body already arranged on the relevant toggle lever itself, in particular magazine, are kept ready. As a result, the dead times in the model change, ie when changing components / workpieces are significantly reduced because the movements of the individual contoured body z. B. in the production control, especially a memory programmable controller (PLC), can be included, so that in a sense by pressing a button, the contoured body, even by remote control, interchangeable or interchangeable. The parameters for the components / workpieces can be kept in a central computer, so that the change of the contoured body on the tensioning arm and the jaw can be performed automatically, manually or semi-automatically from a central control point. The contoured bodies of the tensioning beam and of the jaw can be rigid contoured bodies, but also so-called contouring needle pads, as they are, for example, in the case of the Applicant WO 2005/051602 A1 and in the published documents of the German utility model DE 20 2004 002 982.0 are shown and described. If the contoured body of the tensioning arm and / or the jaw each formed by a plurality of side by side and / or consecutively arranged rod or needle-shaped Einzelklemmkörper (contour pincushion), the individual clamping body against the restoring force depending at least one z. B. pressure spring element out and locked in the respective desired stroke position of each individual clamping body together, but also solved together. If contoured pincushion pads are used, it is possible, in addition to one or more toggle lever clamping devices, to arrange negative contour bodies themselves with which the respective contoured bodies of the jaw and the tensioning arm come into contact as required after unlocking their individual clamping bodies in order to reach the respective desired clamping contour to be adjusted. After removal of the impression, the individual clamping bodies are locked again, as described and illustrated, for example, in the abovementioned WO. In this way, it is possible to machine a large number of model variants on one and the same production line without having to exchange the contoured bodies.

As described, requires this prior art type in addition to a Swivel drive an additional driven locking element. A corresponding sensor or control has the correct position ensure that the lock can be effective.

From the DE 36 19 145 C1 is a chuck with two opposing, consisting of base and top jaw jaws already known whose base jaws are guided in the radial direction adjustable in an annular chuck body with central clamping space and each driven centrally by a substantially axially displaceable in the chuck body mounted wedge bar. Each wedge bar is driven by a piston of a pressure medium cylinder, wherein the strokes of the two pistons are positively synchronized by a mechanical, parallel to the clamping axis of the two jaws lying in the chuck body coupling member. The coupling member is designed as a coupling shaft with formed at their ends teeth, which engage in corresponding racks, which are formed on piston rods connected to the piston. Each end of the coupling member is independent of the other end in relation to the associated piston rod adjustable clearance. The coupling shaft is mounted only in the region of its ends in the chuck body, these bearings are adjustable in relation to the associated rack. Each base jaw is provided with a rotatably mounted intermediate jaw, wherein at least one of these rotatable intermediate jaws is rotatably supported by means of a pivot drive. In one embodiment of such a centrically exciting chuck with an annular chuck body, a pivot drive is provided, which acts by means of two pressure medium-actuated plunger on a polygonal section which is formed on the intermediate jaw. By a successive operation of the plunger twisting of the intermediate jaw by predetermined angle of rotation is possible. The rotational movement exerted on the one intermediate jaw is transmitted via the workpiece clamped between the clamping jaws to the other intermediate jaw, so that only the arrangement of a pivoting drive is required.

task

Of the Innovation is the object of a toggle lever device to create, which is structurally simple, especially in terms of the drive for the contour body holder or magazine and their locking in the respective working position.

solution

The The object is achieved by the reproduced in protection claim 1 features solved.

Some advantages

The renewal Kniehebelspannvorrichtung avoids additional locking drives and the corresponding locking effort with hardware and software. This is depending on the application choice, for example, by one or by two usually wedge-shaped switch plunger he usually ranges, in addition to the drive of a shaft or the corresponding Anformung the contour body holder or the magazine for contour body of the clamping arm and / or the jaw lock the respective end position of the rotational movement backlash. When using two switch plungers, these are driven alternately. Here, the drive shaft rotates with the appropriate Anformung or molding or training of the contour body holder or magazine, for example by 45 °, if the corresponding Anformung is formed as a square. When using a triangular swivel and locking positions can be achieved in 60 ° increments. But it is also possible to achieve other degrees, for example, 90 °, depending on the formation of the respective cooperating approaches and formations of shaft and switch plunger. To support the locking position, compression springs in the motor drives, for example in the piston-cylinder units, can be arranged to drive the switch tappets in all embodiments. As a result, even with a possible pressure drop, the locking positions are securely locked.

Although one the surfaces, with which the Schaltstößel the corresponding contour body holder or magazine or their formations lock each usually flat training, but nothing stands in the way, these cooperating Areas deviating from this with a shape too shape. All that needs to be done is to ensure that the and unlock the switch plunger from the associated Formations of the contour body holder or magazine and the drive shaft also let solve again.

Further inventive embodiments

Further inventive embodiments are in the claims 2 to 40, which individually or in combination also to the solution contribute to the task underlying the innovation.

at the embodiment according to protection claim 2 are the contour body holder or the magazines for the relevant contour body or the contoured body on the clamping arm and / or on the jaw with an impression, for example Mehrkantanformung or polygonal shaft, provided with the appropriate shape strained switch tappets immediately physically interact. This results on the one hand a backlash-free drive, on the other hand, a play-free locking of the parts.

to protection 3 describes an embodiment in which the Anformung or a polygonal shaft of the relevant contour body holder on the clamping arm or on the jaw or on the magazine outside through a straight or curved surface or surfaces is limited or are, with which according to form adapted lengths of the associated switch plunger directly interact physically.

Especially it is advantageous if, according to protection claim 4, the switch tappets on their the contour body holder the clamping arm and / or the jaw or the magazine facing End sections with a shape of the contour body holder adapted Anformung or a wedge running surface are provided, with which the switch plunger the Contour body holder or the like rotatably intermittently drives and also play-free by direct investment or form and / or Adhesion to the associated surface of the contour body holder or the magazine locked in the respectively desired position.

to protection 5 describes an embodiment in which the contour body holder or the magazine of the clamping arm and / or the jaw for the contoured body or its Anformung in an orthogonal square cross section guided to the axis of rotation is or has a corresponding Anformung. This one has It is in the hand to determine the angle to which the contour body holder or magazines are rotated / switched and locked can.

to protection 6 describes a further advantageous embodiment, which also for the embodiments according to the claims 7 to 9 applies.

advantageously, are according to protection claim 10 two or more Switching rams arranged with their longitudinal axes each include an acute angle to each other. The Switch rams can be moved in turns are driven. For this purpose describes protection claim 11th another embodiment.

In the protection claims 12 to 15 are further embodiments described.

There Compressed air in most companies anyway available stands, the drive of the switch plunger is recommended pneumatically - protection claim 16. It is the but nothing in the way of the inventive concept in one embodiment Use in which the drive of the switch plunger Hydraulic takes place - protection claim 17. Protection claim 18 describes a drive by means of linear motors, especially so by electrical means.

In the embodiment of Schutzan Claim 19 can be particularly large locking and switching forces transmitted to the respective surface to be locked of the contour body holder of the clamping arm and / or the jaw.

to protection 20 describes a further advantageous embodiment the innovation. Which also for the embodiments according to the claims 21 to 27 applies.

The Protection claims 28 and 29 describe toggle-type tensioning devices, in which not only a trouble-free drive, but also a reliable locking and unlocking takes place.

at The embodiment according to protection claim 30 results on the one hand a good introduction of the locking force, on the other hand but also a good solution when unlocking by means of the relevant switch plunger.

The Protection claims 31 to 35 describe further advantageous Embodiments of the innovation.

In Protection Claim 36 describes an embodiment in which the switch plunger arranged in a plane while they are in the embodiment Protection claim 37 are arranged in different levels, for example in two planes, which in the longitudinal axis of the driven Shift shaft are arranged one behind the other.

According to protection claim 38 runs in the embodiment described there the plane in which the switch tappets are located, orthogonal to the axis of rotation of the relevant shift shaft passing through the Switching plunger is driven.

According to protection claim 39 act the arranged in different levels switching plunger with the formations or formations arranged in these planes, For example, each a square shaping, or each a triangular shaping or depending on a Polygonanformung, together.

to protection 40 describes a very advantageous embodiment of the Innovation, in which the drive shaft and thus the contour pieces by a correspondingly larger number of switching positions can be moved.

Further Features and advantages of the innovation emerge from the following Description of the drawing, in which the innovation of several embodiments - partly schematically - is illustrated. Show it:

1 a partial side view of a portion of a toggle lever device, wherein a switch plunger is in blocking or locking position and another switch plunger in rest position;

2 a representation accordingly 1 , wherein the other switching plunger is in blocking or locking position, while the first switching plunger is in rest position;

3 a further embodiment of the innovation with located in blocking or locking position switch plunger;

4 from 3 apparent embodiment, wherein the switch plunger has moved from the blocking or locking position in the release position;

5 from 3 and 4 apparent device in a middle stroke position of the switch plunger,

6 a toggle lever in a side view and

7 and 8th another embodiment of the innovation.

In The drawing is the innovation in application to a toggle lever device presented, as they with particular advantage in the body construction of the Automotive industry can be used. Such over Toggle joints are driven toggle tensioners For example, for clamping and thus holding sheets in certain Positions used, for example, by clinching or welding or sticking or the like permanently connected to each other. about Toggle joints powered devices of this kind, however, will also used, for example, sheets in exactly fitting layers with each other to bring in the dowel pins in certain recesses of sheets inserted and then the sheets in this position with each other get connected. Furthermore, such devices are used for example, chassis numbers or factory numbers in metallic Engage parts of bodies under high pressure or they also as swivel brackets, toggle tongs, for embossing of nubs, as a joining tool, embossing pliers, as punching tools or to use as welding devices.

In the drawing, such a toggle clamping device is generally denoted by the reference numeral 1 referred to, which uses in the illustrated embodiment for motor drive a piston-cylinder unit consisting of a cylinder 2 and a therein materially or functionally integrally arranged clamping head 3 ,

In the cylinder 2 is an unillustrated piston longitudinally displaceable and sealing, the outer contour of the inner contour of the cylinder 2 is adjusted. cylinder 2 and piston inside and outside a circular, so cylindrical embodiment, or even a square or rectangular or shaped as well as, for example, a flat oval shape, have. Under flat oval here is an embodiment understood in which two cylinder walls are parallel to each other and the narrow sides are connected by circular arc. Such toggle clamping devices can be installed under tight operating conditions.

The piston is connected to a piston rod, not shown, sealed in the chuck 3 enters and here with the interposition of a toggle joint assembly, also not shown, a clamping arm 4 in the direction of A or B to a housing-fixed pivot axis 5 by a predetermined angular amount, for example, 135 °, in a pivot plane drives. The pivot axis 5 owns - like out 1 emerges - at its outward from the chuck 3 emergent end portion of a square or otherwise shaped approach, with which the clamping arm 4 positive, but detachable and optionally interchangeable connected. Constructive details are omitted for reasons of clarity, they are also numerous in the prior art. In the pivoting plane of the tensioning arm 4 is below the same - seen in the plane of the drawing - designed as a jaw counter bearing 6 arranged with the cylinder 2 or the chuck 3 by means of screws or the like in one piece, for example, releasably and optionally interchangeable connected. In the production line are usually many such toggle clamps 1 arranged, which are included in a sequence control and whose pistons are alternately applied on both sides by fluid pressure, primarily by compressed air, to the respective clamping arm 4 to drive in the direction of A or B and thus swing and workpieces to stretch or edit. The drive of the tensioning arm 4 but can also be done by an electric motor, for example via a worm gear, or by a linear motor or the like.

Between tension arm 4 and pine 6 For example, in the manner to be described, components such as automotive body panels are clamped to temporarily secure them until they are permanently joined together, for example by gluing or spot welding or clinching or the like. Thus, if the term "toggle-type tensioning device" is used in these documents, this term also includes, for example, clinching devices and welding devices or the like designed as a toggle-type tensioning device.

In the illustrated embodiment, the clamping arm 4 and the jaw 6 each contour holder or magazine 7 or 8th assigned to which motor drives 9 or 10 are assigned to which either electrical, pneumatic or hydraulic energy can be supplied to the respective contour body holder or magazine 7 and 8th around their longitudinal axes 11 or 12 to rotate a predetermined angle of, for example, 45 °, 60 ° or 90 ° or 180 ° or the like, indicated by arrows 13 and 14 is indicated. The contour body holders or magazines 7 and 8th serve, for example, at the same time as a carrier of jaws or the like. As in particular from 6 can be seen, are both on the contour body holder or magazine 7 as well as on the contour body holder or magazine 8th two each in the longitudinal axis of the axes 11 or 12 by far and offset by 180 ° to each other arranged contour body 15 respectively. 16 or 17 respectively. 18 arranged with the relevant contour body holder or magazine 7 or 8th geared integrally connected. In this way, a rotary or pivoting movement of the contour body holder leads 7 or 8th around the longitudinal axes 11 or 12 the drives to be described below 9 or 10 to a corresponding pivoting or rotational movement by a predetermined angular amount, for example by 45 °, 60 ° or 90 °, in different clamping positions of the corresponding contour body 15 . 16 respectively. 17 . 18 in which the contoured body 15 . 16 with the corresponding contoured bodies 17 . 18 interact properly and clamp the components, not shown, for example, sheets of a body, clamp. In this way it is possible to clamp with one and the same toggle lever clamping device in a production line different types of metal or types of body parts, without the relevant contour body 15 . 16 respectively. 17 . 18 each had to be replaced by removal and installation. This leads to low downtime in the relevant production line. There can also be more than two contoured bodies each 15 . 16 respectively. 17 . 18 the respective contour body holder 7 . 8th or magazine assigned to each other, for example, in pairs.

The different contoured bodies 15 . 16 respectively. 17 . 18 fit together, for example, in pairs. But it is also possible, this contour body 15 to 18 not only for clamping, but at the same time also for welding, in particular for spot welding to use, in which case the welding electrodes simultaneously form the jaws and contoured body. In this way, different welding electrodes as a contoured body 15 . 16 respectively. 17 . 18 serve.

In the illustrated embodiment, the contour body holders or magazines 7 . 8th be designed to be interchangeable in total, for example, be transported by a handling robot to a central magazine in which other contoured body magazines and magazines are kept with other contour pieces.

The motor drives 9 and 10 as a rotary or rotary actuators of the contour body holder or magazine 7 . 8th are in the form of different embodiments in the 1 and 2 on the one hand and in the 3 to 5 such as 7 to 13 for example.

The embodiment according to the 1 and 2 each shows a square Anformung 19 the respective drive shaft 20 , which the respective contour body holder 7 or 8th is assigned and the respective longitudinal axes 11 respectively. 12 having. In connection with 1 and 2 are the drives 9 and 10 each together for the contour body holder 7 and 8th of the tensioning arm 4 and the counter bearing 6 described.

The reference number 21 Designated bearings, such as needle bearings, with which the drive shaft 20 of the drive 9 or 10 is stored with low friction. The drive shaft 20 is therefore the respective magazine or the contour body holder 7 or 8th assigned.

Like from the 1 and 2 shows, the Anformung 19 each limited in the illustrated embodiment by straight surfaces which are perpendicular to each other. Instead of a square cross section, the drive shaft 20 also have a different cross-sectional shape, for example a rectangular or polygonal, for example, hexagonal or triangular, or the shape of an isosceles triangle, resulting in different switching angles or angles of rotation. The direction of rotation of the drive shaft 20 is by the arrow 22 indicated and additionally designated E.

In a common housing are at the out of the 1 and 2 apparent embodiment, two switch plunger 23 and 24 arranged, whose longitudinal axes 25 and 26 enclose an acute angle α with each other.

The switch tappets 23 and 24 are rounded at their free end portions and have in the illustrated embodiment, a merging into the rounded tip flat button 27 or 28 on, with the relevant flat side wall of the Anformung 19 the drive shaft 20 interacts. To the rounded tip or the rounded end portion of the relevant switch plunger 23 and 24 closes another, opposite surface or Anformung 29 respectively. 30 at. The button 27 is in the off 1 apparent switching position of the switching plunger 23 measured approximately as long as the molding lying here 19 or side surface of the drive shaft 20 , In the illustrated embodiment, the length of the Schaltfäche 27 about 60 to 90% of the length of the molding 19 or its side surface. In the out 1 apparent switching position of the switching plunger 23 the lever arm C is greater than the distance D. This results in a large holding torque, which is on the drive shaft 20 is exercised. In the illustrated embodiment, the lever arm C is about 25 to 55% larger than the distance D. Both distances are in the switching position ( 1 ) of the switch plunger 23 each measured in a straight line.

The switch tappets 23 and 24 Piston rods are one longitudinally displaceable and sealing in a cylinder 31 or 32 guided piston 33 or 34 , The different sides of the pistons 33 respectively. 34 is alternately via lines 35 respectively. 36 or 37 respectively. 38 Pressure medium pressure, in particular compressed air, controlled supplied, so that the switching plunger 23 and 24 work alternately and the drive shaft 20 gradually in the direction of the arrow 22 Turn in order to turn the corresponding contoured body into the exact position in pairs and lock.

To ensure the locking position, for example in pressure medium drop or pressure medium failure, can in the cylinder chamber of the two cylinders 31 and 32 each compression spring elements be arranged under bias, of which for the sake of simple overview, only a compression spring element 39 is shown. In the other cylinder, such a compression spring element is also arranged.

The two switch plungers 23 and 24 are alternately driven by a sequencer so that the buttons 27 and 28 the two switch tappets 23 and 24 alternately on the formations 19 , Present on the side surfaces of the square in cross section drive shaft 20 , act and turn each step, as shown by a comparison of the 1 and 2 can be seen. In the illustrated embodiment, therefore, the drive shaft 20 rotated by 45 °, for example, and by the corresponding button 27 . 28 the associated switch plunger 23 . 24 also locked torsionally stiff. By the piston-cylinder units, formed from the respective switching tappets 23 and 24 and the cylinders 31 and 32 , essentially existing motor drives 9 and 10 thus simultaneously serve the locking of the respective drive shaft 20 and thus also the contour body holder or magazine 7 and 8th of the tensioning arm 4 or the jaw 6 as well as to Drive the drive shaft 20 with the contoured bodies, their holders or magazines.

When using a drive shaft 20 with, for example, triangular cross-section pivotal positions can be achieved in 60 ° increments, the polygonal cross-section corresponding to other pivoting and locking positions.

In the embodiment according to 3 to 5 is a switch plunger with the reference numeral 40 referred to at the same time the piston rod of a longitudinally displaceable and sealing in a cylinder 41 guided piston 42 forms alternately on both sides via lines 43 or 44 can be acted upon with pressure medium pressure, in particular with compressed air, controlled. With 45 is referred to as a spiral compression spring pressure spring element, the biased the piston 42 acted upon, so at a pressure medium failure of the switch plunger 40 in locking position ( 3 ) can be held. This compression spring element 45 can also be omitted in all embodiments.

The switch plunger 40 has a cylindrical length 46 on, on which one side at an acute angle to the longitudinal axis 47 of the switch plunger 40 running button 48 connects that with a shaping 49 a drive shaft 50 cooperates, in the direction of arrow E by the switch plunger 40 is intermittently drivable. The length L is dimensioned slightly smaller than the edge length of the molding 49 , which is formed in the illustrated embodiment as a square and is limited by rectilinear side surfaces. Thus, the angle between these side surfaces is 90 ° in each case.

About the wave 50 become the contour body holders or magazines 7 . 8th each driven, as in the context of the embodiment according to the 1 and 2 such as 6 already described.

In locking position ( 3 ) is the button 48 plan, so planar, on the respective side wall of the molding 49 at.

To the button 48 of the switch plunger 40 joins a length section, which is a recess 51 of U-shaped design. This will make a nose 52 formed at the free end portion, which also with the shaping 49 interacts. One recognizes for example by a comparison of the 3 to 5 in that when the pressure medium is applied to the ring side of the piston 42 this one out of his 3 apparent position in the 4 apparent switching position is reduced. The button is there 48 the shape 49 free while the nose 52 on another side surface of the molding 49 impinges ( 4 ) and thereby the drive shaft 50 continues to turn in the direction of E. In 4 has the piston 42 reached its end position.

Now, if the piston side is acted upon by pressure medium pressure and the ring piston side vented, the switch plunger performs the 5 apparent lifting position by, the button 48 on an edge region of the molding 49 impinges and thereby the drive shaft 50 keep turning in the direction of E until the turn off 3 apparent locking position is reached, in which the button 48 plan and fed on the appropriate surface of the molding 49 is applied and thereby the drive shaft 50 locks, which also causes the contour body holder or magazine 7 and 8th be locked in the respective working position.

In the 7 and 8th an embodiment is described in the switch tappet 53 and 54 are arranged in different planes, in the longitudinal axis of the drive shaft to be driven 55 lie one behind the other. The switch tappets 53 and 54 each act together with a formed as a square Anformung whose side surfaces are perpendicular to each other. The front in the drawing plane switch plunger 53 ( 7 ) acts, for example, alternately with the projections or formations or side surfaces of the respective square 56 . 57 . 58 . 59 together. From the Anformung or shaping of lying in the longitudinal axis behind Vierkantes are only the projections or side surfaces 62 and 63 have been provided with reference numerals.

The switch tappets 53 and 54 are each by pistons 60 respectively. 61 driven, which are acted upon by not shown seals in cylinders, also not shown on both sides by fluid pressure, for example pneumatically, and thereby the switch plunger 53 respectively. 54 drive accordingly and thereby the drive shaft 55 turn around its longitudinal axis. The switch tappets 53 and 54 can also be driven by other drive means, for example by a respective linear motor.

The described in the claims and in the description as well as apparent from the drawing features can both individually and in any combination for realization be essential to the innovation.

1

Toggle clamp

2

cylinder

3

clamping head

4

clamping arm

5

swivel axis

6

End support, jaw

7

Contour body holder, magazine

8th

Contour body holder, magazine

9

Drive, actuator

10

Drive, actuator

11

longitudinal axis

12

longitudinal axis

13

arrow

14

arrow

15

contoured body

16

contoured body

17

contoured body

18

contoured body

19

conformation, formation

20

drive shaft

21

roller bearing

22

arrow

23

switching plunger

24

switching plunger

25

longitudinal axis

26

longitudinal axis

27

button

28

button

29

area

30

area

31

cylinder

32

cylinder

33

piston

34

piston

35

management

36

management

37

management

38

management

39

Compression spring element, Coil spring

40

switching plunger

41

cylinder

42

piston

43

management

44

management

45

Compression spring element, Spiral pressure spring, spring element

46

longitudinal section

47

longitudinal axis

48

button

49

shaping, conformation

50

drive shaft

51

recess

52

nose

53

switching plunger

54

switching plunger

55

drive shaft

56

conformation, Forming, square, polygonal

57

conformation, Forming, square, polygonal

58

conformation, Forming, square, polygonal

59

conformation, Forming, square, polygonal

60

piston

61

piston

62

conformation, Forming, square, polygonal

63

conformation, Forming, square, polygonal

A

Swing direction of the clamping arm 4

B

Swing direction of the clamping arm 4

C

lever arm Section, length section

D

lever arm Section, length section

e

Rotation, arrow

L

length

α

Angle, the longitudinal axes of the switch plunger 23 . 24 lock in

bibliography

• DE 36 19 145 C1
• DE 20 2008 009 702.9

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• WO 2005/051602 A1 [0006]
• - DE 202004002982 [0006]
• - DE 3619145 C1 [0008, 0065]
• - DE 202008009702 [0065]

Claims (40)

Toggle clamping device, in particular for use in the bodywork of the automotive industry, for clamping, clinching, welding, gluing or the like, with a motor via a toggle joint pivotally driven clamping arm ( 4 ), whereby on the tensioning arm ( 4 ) and / or on the jaw ( 6 ) preferably a contour body holder ( 7 . 8th ) or a magazine, each having a plurality of contour bodies are arranged interchangeably, which are each pairwise movable to each other in suitable clamping or working positions and in the respectively desired position can be locked, wherein the contour body holder or the magazine ( 7 . 8th ) for the relevant contoured body on the jaw ( 6 ) and / or on the tensioning arm ( 4 ) in the respective matching position gradually by an actuating device driven by a motor and in the respectively desired position are locked to each other, characterized in that the drive of the relevant contour body holder or the magazine ( 7 . 8th ) by one or more motor-driven switching tappets ( 23 . 24 . 40 ) is vornehmbar that their respective lifting movement on the respective rotatable contour body holder or magazine ( 7 . 8th ) or a drive shaft ( 20 . 50 ) - possibly indirectly - transferred and the relevant contour body holder or the magazine ( 7 . 8th ) or lock the drive shaft for this purpose in the respective desired position backlash. Knee lever clamping device according to claim 1, characterized in that the contour body holder or the magazine ( 7 . 8th ) for the relevant contoured body on the tensioning arm ( 4 ) and / or on the jaw ( 6 ) with a formation ( 19 . 49 ), for example Mehrkantanformung, is provided with the correspondingly form-adapted shift rod ( 23 . 24 . 40 ) interacts directly with the body. Knee lever clamping device according to claim 1 or 2, characterized in that the Anformung ( 19 . 49 ) or a polygonal shaft of the relevant contour body holder ( 7 . 8th ) on the clamping arm ( 4 ) and / or on the jaw ( 6 ) or on the outside of the magazine is limited by straight or curved surfaces, with which correspondingly adapted shape length portions of the associated switch plunger ( 23 . 24 . 40 ) directly interact physically. Knee lever tensioning device according to claim 1 or one of claims 2 to 3, characterized in that the switching tappets ( 23 . 24 . 40 ) at its the contour body holder ( 7 . 8th ) of the tensioning arm ( 4 ) and / or the jaw ( 6 ) or the magazine facing end portion with one of the shape of the contour body holder ( 7 . 8th ) or a wedge-shaped button ( 27 . 28 . 48 ) are provided, with which the switch plunger ( 23 . 24 . 40 ) the contour body holder ( 7 . 8th ) or the like rotatably intermittently drives and also play-free by direct contact or form and / or adhesion to the associated surface of the contour body holder or magazine ( 7 . 8th ) locked in the respective desired position. Knee lever clamping device according to claim 1 or one of the subsequent claims, characterized in that the contour body holder or magazine ( 7 . 8th ) of the tensioning arm ( 4 ) and / or the jaw ( 6 ) is formed square for the contoured body or its Anformung in a guided orthogonal to the axis of rotation cross-section or has a corresponding Anformung. Knee lever clamping device according to claim 1 or one of claims 2 to 4, characterized in that the contour body holder ( 7 . 8th ) of the tensioning arm ( 4 ) and / or the jaw ( 6 ) is formed rectangular in a cross-section orthogonal to the axis of rotation for the contoured body or has a corresponding Anformung. Knee lever clamping device according to claim 1 or one of claims 2 to 4, characterized in that the contour body holder ( 7 . 8th ) of the tensioning arm ( 4 ) and / or the jaw ( 6 ) is polygonal for the contoured body in a guided orthogonal to the axis of rotation cross-section or has a corresponding Anformung. Knee lever clamping device according to claim 1 or one of claims 2 to 4, characterized in that the contour body holder ( 7 . 8th ) of the tensioning arm ( 4 ) and / or the jaw ( 6 ) is formed triangular for the contoured body in a cross-section orthogonal to the axis of rotation or has a corresponding Anformung. Knee lever clamping device according to claim 1 or one of claims 2 to 4, characterized in that the contour body holder ( 7 . 8th ) of the tensioning arm ( 4 ) and / or the jaw ( 6 ) is formed hexagonal for the contoured body in a cross-section orthogonal to the axis of rotation or has a corresponding Anformung. Toggle clamping device according to claim 1 or one of the subsequent claims, characterized in that two or more switching tappets ( 23 . 24 ) are arranged, which with their running in the stroke direction longitudinal axes ( 25 . 26 ) each include an acute angle (α) with each other. Toggle clamping device according to claim 1 or one of the subsequent claims, characterized in that the switching tappets ( 23 . 24 ) alternately on both sides with pressure medium pressure actable pistons ( 33 . 34 ) which are longitudinally displaceable and sealing in the cylinder ( 31 . 32 ) are guided, wherein the piston rods, the switch plunger ( 23 . 24 ) form at their ends the shape adaptation to the contour body holder or magazine ( 7 . 8th ) or have their projections for the contoured body. Knee lever clamping device according to claim 1 or one of the subsequent claims, characterized in that the contour body holder or magazine ( 7 . 8th ) are designed as revolver magazines. Knee lever clamping device according to claim 1 or one of the subsequent claims, characterized in that the contour body holder ( 7 . 8th ) each have a plurality of magazines for two or more different contoured body. Toggle clamping device according to claim 13 or one of the subsequent claims, characterized in that in the magazine ( 7 . 8th ) of the tensioning arm ( 4 ) and / or the jaw ( 6 ) are arranged in each case three different contoured body. Toggle clamping device according to claim 13 or one of the subsequent claims, characterized in that in the magazine ( 7 . 8th ) for the tensioning arm ( 4 ) and / or for the jaw ( 6 ) In each case four different contoured body are arranged. Knee lever tensioning device according to claim 1 or one of the subsequent claims, characterized in that the drive of the switching tappets ( 23 . 24 . 40 ) pneumatically. Knee lever tensioning device according to claim 1 or one of claims 2 to 16, characterized in that the drive of the switching plunger ( 23 . 24 . 40 ) hydraulically. Knee lever clamping device according to claim 1 or one of claims 2 to 17, characterized in that the drive of the switch plunger ( 23 . 24 . 40 ) is carried out electrically or by a respective linear motor. Toggle clamping device according to claim 1 or one of the subsequent claims, characterized in that the button ( 27 . 28 . 48 ) with the switch plunger ( 23 . 24 . 40 ) in the locking position with a shape adapted surface ( 19 ) on the corresponding contour of the contour body holder ( 7 . 8th ) or a drive shaft ( 20 . 50 ) of the tensioning arm ( 4 ) and / or the jaw ( 6 ) is applied, a large part of this surface concerned, preferably more than half or the whole surface, locking free play. Toggle clamping device according to claim 1 or one of the subsequent claims, characterized in that the switching tappets ( 23 . 24 . 40 ) are rounded at their free ends and open at different wedge angles in their side surfaces. Toggle clamping device according to claim 1 or one of the subsequent claims, characterized in that the switching tappets ( 23 . 24 . 40 ) in one piece with the piston rod of a longitudinally displaceable and sealingly guided in a cylinder piston ( 33 . 34 . 42 ) are formed. Toggle clamping device according to claim 1 or one of the subsequent claims, characterized in that the switching tappets ( 23 . 24 . 40 ) are integrally formed materially with the piston rod. Toggle clamping device according to claim 1 or one of the subsequent claims, characterized in that the relevant switching tappet ( 23 . 24 . 40 ) in the locking position by at least one spring element ( 45 ) is held in the locked position additionally or instead with pressure medium pressure. Knee lever clamping device according to claim 23, characterized in that the spring element as a compression spring ( 45 ) is trained. Knee lever clamping device according to claim 23, characterized in that the compression spring element ( 45 ) is designed as a helical compression spring. Knee lever clamping device according to claim 23, characterized in that the spring element ( 45 ) is formed as consisting of a plastic block spring element. Toggle clamping device according to 26, characterized that the plastic block is made of a polyurethane plastic, to reduce its hysteresis from a pre-pressed plastic block is made and the corresponding Shore hardness as well Resistance to the usually in the enterprise has occurring fats and oils and in the required Dimensions are ozone resistant. Toggle clamping device according to claim 1 or one of the subsequent claims, characterized in that the button ( 27 . 28 . 48 ), with which the relevant switch plunger ( 23 . 24 . 40 ) in the locking position on the associated surface of the contour body holder, the magazine or a Anformung same or on the drive shaft ( 20 ), an acute angle with the longitudinal axis ( 25 . 26 ) of the associated plunger ( 23 . 24 ). Toggle clamping device according to claim 1 or one of the subsequent claims, characterized in that the button ( 27 . 28 . 48 ), with which the switch plunger ( 23 . 24 . 40 ) in the locking position on the associated surface of the contour body holder ( 7 . 8th ) or the drive shaft, with the longitudinal axis of the plunger ( 23 . 24 . 40 ) forms an angle which is below the self-locking. Toggle clamping device according to claim 1 or one of the subsequent claims, characterized in that the longitudinal section, with which the switching tappet ( 23 . 24 ) at the associated Anformung the contour body holder ( 7 . 8th ) or the drive shaft ( 20 ) is substantially divided into two sections (C, D), wherein the one from the center of the contour body holder ( 7 . 8th ) or the drive shaft ( 20 ) measured up to its outer edge and perpendicular to the outer edge distance (D) is greater, preferably considerably larger dimensioned than the other remaining length portion with which the switch plunger ( 23 . 24 ) on the molding of the contour body holder ( 7 . 8th ) or the drive shaft ( 20 ) is present. Toggle clamping device according to claim 1 or one of the subsequent claims, characterized in that the switching tappets ( 23 . 24 ) are drivable in an alternating sequence. Toggle clamping device according to claim 1 or one of the subsequent claims, characterized in that the switching tappets ( 23 . 24 ) are arranged with their motor drives each in a common device. Knee lever tensioning device according to claim 1 or one of the subsequent claims, characterized in that the switching plunger ( 40 ) consists of several, the respective contour body holder facing longitudinal sections, wherein the one longitudinal section is bounded by a plane extending parallel to the longitudinal axis of the plunger lateral surface, which adjoins a running at an acute angle to the longitudinal axis surface, with which the switch plunger ( 40 ) on the respective contour body holder ( 7 . 8th ) or the drive shaft ( 20 ) engages locking and another longitudinal section, which consists of a recess ( 51 ), which in the direction of the longitudinal axis ( 47 ) of the switch plunger ( 40 ), which is followed by another length section with a nose ( 52 ) connected to an outer surface of the contour body holder ( 7 . 8th ) or the drive shaft ( 20 ) cooperates non-positively. Knee lever clamping device according to claim 33, characterized in that the recess ( 51 ) Is U-shaped. Knee lever clamping device according to claim 33 or 34, characterized in that the button ( 48 ), with which the switch plunger ( 40 ) on the contour body holder ( 7 . 8th ) or the drive shaft ( 50 ) in the locking position, equal to or slightly shorter than this surface of the contoured body ( 7 . 8th ) or the like. Toggle clamping device according to claim 1 or one of claims 2 to 35, characterized in that the switching tappets ( 23 . 24 ) are arranged in a plane. Toggle clamping device according to claim 1 or one of claims 2 to 36, characterized in that the switching tappets ( 53 . 54 ) are arranged in different levels. Toggle clamping device according to claim 1 or one of claims 2 to 35, characterized in that the plane or planes in which the switching tappets ( 23 . 24 respectively. 53 . 54 ) are arranged, in each case orthogonal to the axis of rotation of the drive shaft to be driven ( 20 respectively. 55 ) is arranged or are. Knee lever clamping device according to claim 37 or 38, characterized in that arranged in different planes switching plunger ( 53 . 54 ) each with there at the drive shaft to be driven ( 55 ) located formations or formations ( 56 respectively. 62 ) interact. Knee lever clamping device according to claim 39, characterized in that the projections or formations ( 56 to 62 ) are of the same shape in the different planes, but with respect to the longitudinal axis of the drive shaft ( 55 ) are offset by a predetermined angular extent against each other in the direction of rotation.