EP3299124B1 - Device for positioning and clamping of workpieces - Google Patents

Description

The invention relates to a device for positioning and clamping of workpieces, comprising a housing, an axially displaceably mounted in the housing positioning pin, wherein the positioning pin is moved by means of a drive unit. One end of the positioning pin is guided out of the housing in the axial direction, the positioning pin receiving at least one clamping hook in the region of the extended end, wherein the clamping hook is mounted so as to be movable transversely to the axial direction in the positioning pin.

Such a device is, for example, a substructure tensioner. Typically, for the purpose of positioning the workpiece, the positioning pin is retracted into workpiece-side receiving holes and the workpiece is tensioned following positioning by means of the clamping hook. For this purpose, the clamping hook is moved transversely to the axial direction, so that it protrudes from an outer surface of the positioning pin and engages behind the workpiece on a side facing away from the housing.

A device having the features of the type mentioned, is from the document US Pat. No. 6,786,478 B2 known. This device has two opposite clamping hooks, wherein the two clamping hooks each have a slot on a portion disposed within the positioning portion. The respective slot accommodates a respective dowel pin formed in a central rod. The central rod is designed such that it rotates during an axial displacement of the positioning pin, wherein the two clamping hooks are displaced due to the interaction of the slots with the dowel pins in the transverse direction.

From the publication US 6,364,300 B1 Furthermore, a device for clamping workpieces is known, wherein the device comprises two opposite clamping hooks, which are pivotally mounted about a stationary mounted in the housing axis and the two clamping hooks are arranged in an open switching position of the device within the positioning pin. The two clamping hooks are mounted in a guide receptacle of an axially displaceable rod, wherein upon an axial displacement of the rod, the clamping hooks due to the interaction with the guide receptacle perform a pivoting movement.

Another device for positioning and clamping of workpieces is in the document US Pat. No. 6,902,159 B2 described, wherein the device comprises an axially displaceable first rod and a second rod rotatably mounted in the first rod, wherein the second rod rotates during a linear movement of the first rod and the second rod cooperates with two clamping hooks such that upon rotation the second rod, the two clamping hooks are swung out of the positioning pin.

An apparatus according to the preamble of claim 1 shows the EP 0 322 617 , Object of the present invention is to provide a comparison with the device for positioning and clamping of workpieces of the type mentioned modified device that is structurally particularly simple and robust.

The object is achieved by a device which is designed according to the features of patent claim 1.

In the apparatus, the device according to the invention provides that the device has a stationary in the housing stop pin, wherein a guide portion of the stop pin projects from the housing, the positioning pin receives this guide area and the guide area acts when moving the positioning pin on the clamping hook.

As a result, a transverse displacement of the clamping hook in an axial displacement of the positioning pin in a very simple manner and in particular possible with a small number of moving components. Consequently, such a designed device is extremely robust and low maintenance.

Preferably, the clamping hook is disposed in an open switching position of the device completely within the positioning pin to allow the retraction of the positioning pin in a workpiece-side receiving hole.

It is considered particularly advantageous in this context if the guide region has a widening in the direction of the housing cross-section. Accordingly, in the case of an axial displacement of the positioning pin in the direction of the housing, the clamping hook is displaced outward in the transverse direction, so that the clamping hook engages behind and clamps the workpiece on a side facing away from the housing.

During axial displacement of the positioning pin, the clamping hook mounted in the positioning pin is displaced axially in accordance with the movement of the positioning pin, wherein the guide hook contacts the guide area on its side facing the guide area of the stop pin when the guide portion acts on the guide hook, the clamping hook corresponding to the axial displacement of the positioning pin Contour of the guide area is moved in the transverse direction. Since the movement of the clamping hook follows the contour of the guide region, the transverse movement of the clamping hook can be adapted in the case of axial displacement of the positioning pin in a simple manner by a corresponding shaping of the contour.

But it is also quite conceivable that the guide portion has a tapered in the direction of the housing cross-section, whereby the clamping hooks are moved to the outside with an axial displacement of the positioning pin away from the housing.

It is also conceivable that the tensioning hook is displaceably mounted in a guide receptacle of the guide area, for example in a guide receptacle designed as a groove.

Preferably, the guide region is wedge-shaped. It is quite conceivable that a cross section of the guide region is formed, which widens in the direction of the housing in the transverse spatial direction and is constant in a spatial direction perpendicular thereto.

It is considered to be particularly advantageous if the guide region has a first subregion with a cross section widening in the direction of the housing and a second subregion adjoining it in the direction of the housing with a constant cross section. In this context, it is considered to be particularly advantageous if the guide region also has, at its end facing away from the housing, a third subregion with a constant cross section adjoining the first subregion.

In an advantageous embodiment of the invention, the stop pin passes through the housing.

In a preferred embodiment, the positioning pin and the stop pin are arranged coaxially. It is quite conceivable that the stop pin forms a linear guide for the positioning. As a result, a precise positioning of the positioning pin and the stop pin and a particularly good and stable guidance of the positioning pin is ensured in a simple manner.

In order to ensure a particularly good interaction between the stop pin and the clamping hook, in particular to avoid jamming or wedging stop pin and clamping hooks during axial displacement, is provided in an advantageous development that the clamping hook on the side facing the guide area in the direction of the housing has tapered cross-section.

In addition, such a design of the clamping hook allows a transverse displacement during axial displacement of the positioning pin, even with a stop pin with a constant cross-section.

To ensure that the clamping hook rests against the stop pin when the guide portion acts on the device, in an advantageous embodiment, a return means acting on the tension hook, in particular a restoring means designed as a mechanical spring, wherein a movement of the clamping hook transversely outward against a restoring force of Return means takes place. Preferably, the return means is designed such that it limits the displaceability of the clamping hook to the outside. In addition, the return means causes the clamping hook is returned to its original position when the guide portion is not affected. Preferably, the tensioning hook is arranged completely in its initial position within the positioning pin.

In a particularly preferred embodiment, the positioning pin receives two preferably opposite clamping hooks, in particular two identically designed clamping hooks.

It is considered particularly advantageous if the respective clamping hook has a recess, in particular on the side facing the housing or on the side facing away from the housing, the recess receiving the return means. It is provided in particular that the return means is designed as a helical spring, band spring, compression spring, tension spring or shaft ring. Preferably, the stopper pin passes through the spring or the ring in the axial direction in the closed state of the device. It is quite conceivable that a portion of the respective clamping hook penetrates the spring or the ring in the axial direction.

It is considered advantageous if two opposite ends of the return means are formed angled to the transverse direction, for example in the axial direction, and the one end is arranged in a recess of a clamping hook and the other end in a recess of the other clamping hook. As a result, the return means acts on the opposite ends on a transposition of the clamping hook transversely outward in the opposite direction on the clamping hooks on the opposite ends.

It is considered particularly advantageous in this context if the respective recess is formed adjacent to a wall of the positioning pin, preferably the wall covers the respective recess. As a result, the return means against external forces and against contamination is particularly well protected.

In an advantageous development of the device, this has an axially displaceable bearing element, wherein the bearing element cooperates with the drive unit and the positioning pin is detachably connected to the bearing element. This embodiment makes it possible to remove the positioning pin in a particularly simple manner and / or replace it with another positioning pin. Thus, the device is particularly flexible use, for example, a positioning of the device against a differently shaped positioning, for example, a positioning with a different diameter, with little effort and time to be exchanged.

In this connection, it is considered to be particularly advantageous if the device has connecting means, for example screws, for connecting the positioning pin and the bearing element. In addition, it is quite conceivable that the bearing element and / or the positioning pin for insertion into the corresponding corresponding component, namely the positioning pin or the bearing element has. Thereby, the positioning and alignment of the positioning pin to the bearing element for connecting the positioning pin is facilitated.

In a preferred embodiment, the bearing element receives the stop pin. It is quite conceivable that the stop pin forms a linear guide for the bearing element.

The device may be designed such that the positioning pin or the bearing element is connected via a toggle joint arrangement with the drive unit, in particular with a piston rod of the drive unit. This prevents that the device in case of failure of the drive unit at opens an exciting state.

Preferably, the toggle lever assembly has a lever with a guide groove, wherein the bearing element or the positioning pin are slidably mounted in the guide groove. Preferably, the guide groove is formed as a slot and a bearing pin of the bearing element or the positioning pin passes through the slot. In addition to the connection of the bearing element or the positioning pin to the toggle joint assembly is also secured by the bearing pin, the bearing element or the positioning pin against rotation about an axial axis.

It is considered particularly advantageous if the lever passes through the bearing element or the positioning pin.

In a particularly preferred embodiment, the stop pin is fixedly mounted in the housing by means of another bearing pin. This makes it possible to replace the stop pin against a stop pin with a differently shaped guide area.

In this context, it is considered to be particularly advantageous if the other bearing pin passes through an elongated hole formed in the axial direction of the bearing element or of the positioning pin. As a result, an axial displaceability of the bearing element or of the positioning pin is ensured, wherein the penetrating bearing pin also serves as a guide for the bearing element or for the positioning pin.

The drive unit can be formed for example by a pneumatic cylinder with a piston rod.

With regard to a rotationally secure mounting of the clamping hook, it is considered to be particularly advantageous if the clamping hook contacts a guide surface of the guide region, in particular the clamping hook has a receptacle for the guide region. This receptacle may be formed, for example, as a groove.

Further features of the invention are set forth in the subclaims, the description of the figures and in the figures themselves.

In the figures, the invention with reference to two embodiments is illustrated, without being limited to the described embodiments.

Fig. 1

eine erste Ausführungsform der Vorrichtung, die als Unterbauspanner ausgebildet ist, in einer perspektivischen Ansicht,

Fig. 2

die Vorrichtung gemäß Fig. 1 in einem geöffneten Zustand in einer Schnittansicht gemäß der Linie II in Fig. 5,

Fig. 3

die Vorrichtung gemäß Fig. 1 in einem Zwischenzustand in einer Schnittansicht, entsprechend der Ansicht der Fig. 2,

Fig. 4

die Vorrichtung gemäß Fig. 1 in einem geschlossenen Zustand in einer Schnittansicht gemäß der Linie IV in Fig. 6,

Fig. 5

die Vorrichtung in einer Schnittansicht gemäß der Linie V in Fig. 2,

Fig. 6

die Vorrichtung in einer Schnittansicht gemäß der Linie VI in Fig. 4,

Fig. 7

einen Ausschnitt der Vorrichtung gemäß der strichpunktierten Kreislinie in Fig. 2,

Fig. 8

einen Ausschnitt der Vorrichtung gemäß der strichpunktierten Kreislinie in Fig. 4,

Fig. 9

zwei Spannhaken der Vorrichtung und ein den Spannhaken zugeordnetes Rückstellmittel in einer perspektivischen Ansicht,

Fig. 10

die Vorrichtung mit einem teilweise entfernten Gehäuse in einem geöffneten Zustand in einer perspektivischen Ansicht,

Fig. 11

einen Ausschnitt der Vorrichtung in einem Verbindungsbereich für einen Positionierstift sowie zwei Ausführungsformen des Positionierstifts in einer perspektivischen Ansicht,

Fig. 12

einen Ausschnitt der Vorrichtung mit blockartig ausgebildeten Spannhaken in einem geschlossenen Zustand in einer perspektivischen Ansicht,

Fig. 13

einen Ausschnitt einer zweiten Ausführungsform der Vorrichtung mit gewinkelt ausgebildeten Spannhaken in einem geschlossenen Zustand in einer perspektivischen Ansicht gemäß Fig. 12,

Fig. 14

einen Ausschnitt einer dritten Ausführungsform der Vorrichtung in einem geöffneten Zustand in einer Schnittansicht wie in der Fig. 7,

Fig. 15

die Vorrichtung gemäß Fig. 14 in einem geschlossenen Zustand in einer Schnittansicht wie in der Fig. 14,

Fig. 16

die zwei Spannhaken und das Rückstellmittel der Vorrichtung gemäß Fig. 14 in einer perspektivischen Ansicht,

Fig. 17

eine Anordnung von Komponenten einer vierten Ausführungsform der Vorrichtung in einem geöffneten Zustand in einer Schnittansicht wie in der Fig. 7,

Fig. 18

die zwei Spannhaken und das Rückstellmittel der Vorrichtung gemäß Fig. 17 in einer perspektivischen Ansicht,

Fig. 19

eine Anordnung der Komponenten gemäß Fig. 17 in einem geschlossenen Zustand der Vorrichtung in einer Schnittansicht wie in der Fig. 17,

Fig. 20

die zwei Spannhaken und das Rückstellmittel der Vorrichtung gemäß Fig. 19 in einer perspektivischen Ansicht.

It shows:

Fig. 1

a first embodiment of the device, which is designed as a substructure tensioner, in a perspective view,

Fig. 2

the device according to Fig. 1 in an opened state in a sectional view along the line II in FIG Fig. 5 .

Fig. 3

the device according to Fig. 1 in an intermediate state in a sectional view, corresponding to the view of Fig. 2 .

Fig. 4

the device according to Fig. 1 in a closed state in a sectional view along the line IV in FIG Fig. 6 .

Fig. 5

the device in a sectional view along the line V in Fig. 2 .

Fig. 6

the device in a sectional view along the line VI in Fig. 4 .

Fig. 7

a section of the device according to the dot-dash line in Fig. 2 .

Fig. 8

a section of the device according to the dot-dash line in Fig. 4 .

Fig. 9

two tensioning hooks of the device and a tensioning hook associated with the return means in a perspective view,

Fig. 10

the device with a partially removed housing in an open state in a perspective view,

Fig. 11

a detail of the device in a connection region for a positioning pin and two embodiments of the positioning pin in a perspective view,

Fig. 12

a detail of the device with block-like clamping hooks in a closed state in a perspective view,

Fig. 13

a detail of a second embodiment of the device with angled trained clamping hooks in a closed state in a perspective view according to Fig. 12 .

Fig. 14

a section of a third embodiment of the device in an open state in a sectional view as in Fig. 7 .

Fig. 15

the device according to Fig. 14 in a closed state in a sectional view as in Fig. 14 .

Fig. 16

the two clamping hooks and the return means of the device according to Fig. 14 in a perspective view,

Fig. 17

an arrangement of components of a fourth embodiment of the device in an open state in a sectional view as in Fig. 7 .

Fig. 18

the two clamping hooks and the return means of the device according to Fig. 17 in a perspective view,

Fig. 19

an arrangement of the components according to Fig. 17 in a closed state of the device in a sectional view as in Fig. 17 .

Fig. 20

the two clamping hooks and the return means of the device according to Fig. 19 in a perspective view.

The Fig. 1 to 4 show a device 1 for positioning and clamping of workpieces 24, in particular of body parts in the automotive industry, in various states, wherein the Fig. 2 the device 1 in an open state, the FIG. 4 the device 1 in a closed or exciting state and the Fig. 3 show the device 1 in an intermediate state between the open state and the closed state.

The device 1 has a multi-part housing 2. In this case, two housing halves 33, 34 are connected to one another by means of screws 36 and a housing cover 35 is connected to the housing halves 33, 34 in the region of the front side by means of screws 37. The housing 2 has an axially displaceable in the region of the housing cover 35 positioning pin 3, wherein the positioning pin 3 is connected by means designed as a screw connecting means 21 with a likewise axially displaceable bearing element 10.

The bearing element 10 is connected via a toggle joint arrangement 12, 13 with a drive unit 11, wherein the drive unit 11 is formed by a pneumatic cylinder 27 with a piston rod 23. The toggle joint arrangement 12, 13 has a two-armed lever 12 with a slot formed as a guide groove 14, wherein the bearing pin 15 of the bearing element 10 passes through the guide groove 14, whereby the bearing element 10 slidably mounted in the Z direction in the guide groove 14 and a rotation of the bearing element 10 is prevented by an axial axis.

The lever 12 is in the region of an end facing away from the bearing pin 15 pivotally connected to a rod 13 of the toggle lever assembly 12, 13 in the area one end of the rod 13 connected. In this case, an axis 26 passes through the lever 12 and the rod 13. In the region of the other end, the rod 13 is pivotally mounted via an axis 28 in the axially movable piston rod 23 of the drive unit 11.

The lever 12 is pivotally mounted in the housing 2 by means of a further, fixedly mounted in the housing 2 bearing pin 17.

The rod 13 and the associated with this lever 12 form the toggle lever assembly 12, 13, which is located at clamped workpiece 24 and thus in a closed state of the device 1 in a position in which, without the action of the drive unit 11, an opening of the device 1 is prevented. This condition is in the Fig. 4 shown.

One end of the positioning pin 3 is led out of the housing 2 in the axial direction Z. The positioning pin 3 of the device 1 is used for positioning or centering of the workpiece 24, preferably a sheet. For positioning of the workpiece 24, the positioning pin 3 is retracted into a workpiece-side receiving hole, which is in particular circular.

For the purpose of clamping the workpiece 24, the positioning pin 3 receives two opposite and identically formed clamping hooks 6 in the region of the extended end, the two clamping hooks 6 being mounted transversely to the axial direction Z in the positioning pin 3. In order to achieve a displacement of the clamping hooks 6 in the transverse direction X when moving the positioning pin 3 in the axial direction Z, the device 1 has a stop pin 4 stationarily mounted in the housing 2, a guide area 5 of the stop pin 4 protruding from the housing 2 and the positioning pin 3 receives this guide area 5. When moving the positioning pin 3 thus the guide portion 5 acts on the two clamping hooks 6, whereby when moving the positioning pin 3 in the Z direction towards the housing 2, the clamping hooks 6 are displaced transversely outwards in opposite directions and in a closed state of the device. 1 protrude from a wall 9 of the positioning pin 3, whereby the clamping hooks 6 a on the device. 1 arranged workpiece 24 engage behind on a side facing away from the housing 2 and thus the workpiece 24 is clamped against a connected to the housing 2 support plate 25.

Due to the transverse displacement of the tensioning hooks 6, a through-opening of the positioning pin 3 penetrated by the respective tensioning hook 6 is fully occupied by the respective tensioning hook 6 in the opened, closed and intermediate states of the device 1. As a result, the penetration of foreign bodies, such as welding spatter in the positioning pin 3 is prevented or at least difficult.

The support plate 25 is connected by means of screws 38 with the housing cover 35 of the device 1. By an exchange or a corresponding selection of the support plate 25, in particular the thickness of the support plate 25, the device 1 can be adapted to the dimensions, in particular to the strength of the workpiece to be clamped 24.

The stopper pin 4 passes through the housing cover 35 of the device 1, wherein the stopper pin 4 is fixedly mounted in the housing 2 by means of another bearing pin 16.

The positioning pin 3 and the stop pin 4 are arranged coaxially, wherein a portion of the stop pin 4 is disposed within the positioning pin 3 and forms a linear guide for the positioning pin 3.

Furthermore, the bearing element 10 receives the stop pin 4, wherein the stop pin 4 also forms a linear guide for the bearing element 10.

In order to ensure axial displaceability of the bearing element 10, the bearing element 10 has an elongated hole 29 formed in the axial direction Z, wherein the other bearing pin 16 passes through the slot 29.

The respective clamping hook 6 contacts a guide surface 18 of the guide region 5, wherein the guide region 5 extends in the direction of the Housing 2 has widening cross section, wherein the cross section widens in the direction of the housing 2 in the transverse spatial direction X, as in particular the Fig. 2 to 4 can be seen. In contrast, in a vertical spatial direction Y, the guide region 5 has a constant cross-section, as in particular the FIGS. 5 and 6 can be seen.

This shape of the guide region 5 ensures that the clamping hooks 6 are displaced transversely outwards in the direction of the housing 2 when the positioning pin 4 is displaced.

In detail, the guide region 5 has a first partial region 30 with a cross-section widening linearly in the direction of the housing 2 and a second partial region 31 adjoining it in the direction of the housing with a constant cross-section. The two clamping hooks 6 each have on the side facing the guide portion 5 a in the direction of the housing 2 linearly tapering cross-section, wherein the shape of the tapered portion of the clamping hooks 6 corresponds to the shape of the first portion 30 of the guide portion 5, whereby a particular good and in particular rotation-safe guidance of the clamping hooks 6 is ensured by the guide portion 5.

Furthermore, the guide region 5 at its end facing away from the housing 2 has a third partial region 32 of constant cross section adjoining the first partial region 30, wherein in an opened state of the device 1, a partial region of the respective clamping hook 6 over the entire surface on the third partial region 32 of the guide region 5 is present.

In order to ensure that the clamping hooks 6 always bear against the guide region 5 on their side facing the guide region 5 when the positioning pin 4 is displaced, the device 1 has a return means 7 acting on the clamping hooks 6, wherein a movement of the clamping hooks 6 transversely outside against a restoring force of the return means 7 takes place.

The return means 7 is designed as a helical spring, wherein the respective clamping hook 6 on a side facing away from the housing 2 a recess 8 in Has the shape of a half circular ring and these recesses 8 record the return means 7, wherein a portion of the respective clamping hook passes through the return means 7 in the axial direction. The respective recess 8 is formed adjacent to the wall 9 of the positioning pin 3 such that the wall 9, the recess 8 regardless of the state of the device 1 completely covers, as in particular the Fig. 7 and 8th can be seen. As a result, the return means 7 is protected against external influences. Furthermore, the stopper pin 4 passes through the return means 7 in the closed state of the device 1.

The FIGS. 14 to 16 and FIGS. 17 to 20 each show a further exemplary embodiment of the device 1, which differs essentially from the other exemplary embodiments due to the nature of the return means 7 and the mounting of the return means 7 in the clamping hooks 6.

In the embodiment according to the FIGS. 14 to 16 the return means 7 is annular, with two portions of the return means 7 overlapping each other and the respective portion comprises an end 39 formed in the axial direction Z, the end 39 of the one portion being formed in an axial recess 40 in the area of the semicircular recess 8 a tensioning hook 6 and the end 39 of the other portion in a corresponding axial recess 40 of the other clamping hook 6 is arranged. The recesses 40 are formed as bores. Such an embodiment of the return means 7 and the storage of the return means 7 in the clamping hooks 6 is particularly suitable for smaller displacement paths of the clamping hooks, typically displacement ranges in the range of 0 to 1.5 mm, between the open state and the closed state of the device. 1

That in the FIGS. 17 to 20 illustrated embodiment differs from the embodiment according to the FIGS. 14 to 16 essentially by the nature of the return means 7, which is substantially annular, but has no overlapping portions. Such an embodiment of the return means 7 and the storage of the return means 7 in the clamping hook 6 is particularly suitable for larger displacement paths of the clamping hooks, typically shifts in the range up to 10 mm, between the open state and the closed state of the device. 1

The releasable connection of the positioning pin 3 with the bearing element 10 makes it possible to replace the positioning pin 3 in a simple manner, for example, to exchange with a positioning pin 3 with a different geometric shape, with other dimensions and / or with another embodiment of the clamping hooks 6. Exemplary are in the Fig. 11 two different embodiments of the positioning pin 3 shown.

In order to facilitate the alignment of the bearing element 10 and the positioning pin 3 when connecting the positioning pin 3 to the bearing element 10, the bearing element 10 has two protruding from a connecting surface of the bearing element 10 bolts 20, said bolts 20 are inserted into corresponding receiving holes of the positioning pin 3 , Furthermore, a portion of the housing 2 is slightly protruding from the connecting surface of the bearing member 10, so that insertion and alignment of the positioning pin 3 is facilitated.

The FIGS. 12 and 13 each show an embodiment of the device 1 in a closed state, in which state the workpiece 24 between the two clamping hooks 6 and the housing-side support plate 25 is stretched. The two embodiments differ in this case by the outer dimensions of the positioning pin 3, as well as the shape of the clamping hooks 6, wherein the clamping hooks 6 of the first embodiment block-like and the clamping hooks 6 of the second embodiment are formed angled.

The support plate 25 is detachably connected to the housing 2 of the device 1, in particular screwed, whereby a simple replacement of the support plate 25 is possible.

To seal the interior of the device 1 against contamination, especially against water, the device 1 in the region of the positioning pin 3 between the housing cover 35 and the positioning pin 3 in a recess The device 2 arranged sealing means 19 in the form of an O-ring, wherein the positioning pin 3 passes through the O-ring.

In order to ensure that the toggle joint arrangement 12, 13 is always in a position during clamping of workpieces 24 of different thickness, in which opening of the device 1 is prevented without the action of the drive unit 11, the device 1 has a spring device mounted in the housing 2 22, which forms a resilient stop for the rod 13 of the toggle joint assembly 12, 13 during clamping of the workpiece 24 according to its strength.

For this purpose, the spring device 22 on a split spring receptacle with acting on relatively movable receiving parts of the spring receiving mechanical springs. Here, means for connecting the two receiving parts are provided under the action of the springs. When clamping the workpiece 24, one receiving part is supported on the housing 2 and the other receiving part acts on the rod 13.

LIST OF REFERENCE NUMBERS

1

device

2

casing

3

positioning

4

stop pin

5

guide region

6

tenterhook

7

Return means

8th

recess

9

wall

10

bearing element

11

drive unit

12

lever

13

pole

14

guide

15

bearing bolt

16

Other bearing bolt

17

Another bearing bolt

18

guide surface

19

sealant

20

bolt

21

connecting means

22

spring means

23

piston rod

24

workpiece

25

platen

26

axis

27

pneumatic cylinder

28

axis

29

Long hole

30

First section

31

Second subarea

32

Third subarea

33

housing half

34

housing half

35

housing cover

36

screw

37

screw

38

screw

39

The End

40

recess

x

spatial direction

y

spatial direction

z

spatial direction

Claims (16)

1. Device (1) for positioning and clamping workpieces (24), in particular body components in the motor vehicle industry, comprising a housing (2), a positioning pin (3), which is axially displaceable in the housing (2), wherein the positioning pin (3) is movable by means of a drive unit (11), one end of the positioning pin (3) is led out of the housing (2) in the axial direction (Z), wherein the positioning pin (3) receives at least one clamping hook (6) in the region of the led-out end, wherein the clamping hook (6) is movably mounted transversally in relation to the axial direction (Z) in the positioning pin (3), characterized in that the device (1) has a stop pin (4) fixedly mounted in the housing (2), wherein a guiding region (5) of the stop pin (4) protrudes from the housing (2), the positioning pin (3) receives this guiding region (5) and wherein the guiding region (5) acts on the clamping hook (6) when the positioning pin (3) is displaced.
2. Device (1) according to Claim 1, characterized in that the stop pin (4) passes through the housing (2).
3. Device (1) according to Claim 1 or 2, characterized in that the positioning pin (3) and the stop pin (4) are arranged coaxially, in particular the stop pin (4) forms a linear guide for the positioning pin (3).
4. Device (1) according to one of Claims 1 to 3, characterized in that the guiding region (5) has a cross section widening in the direction of the housing (2), in particular a cross section that widens in the direction of the housing (2) in the transversal spatial direction (X) and is constant in a spatial direction (Y) perpendicular thereto is formed, preferably the guiding region (5) is formed in a wedge-shaped manner.
5. Device according to Claim 4, characterized in that the guiding region (5) has a first subregion (30), with a cross section widening in the direction of the housing (2), and a second subregion (31), with a constant cross section, which adjoins the first subregion (30) in the direction of the housing (2), preferably the guiding region (5) has at its end remote from the housing (2) a third subregion (32), with a constant cross section, which adjoins the first subregion (30).
6. Device (1) according to one of Claims 1 to 5, characterized in that the clamping hook (6) has on the side facing the guiding region (5) a cross section tapering in the direction of the housing (2).
7. Device (1) according to one of Claims 1 to 6, characterized in that the device (1) has a restoring means (7), acting on the clamping hook (6), in particular a restoring means (7) formed as a mechanical spring, wherein a movement of the clamping hook (6) takes place transversally outwards, counter to a restoring force of the restoring means (7).
8. Device (1) according to one of Claims 1 to 7, characterized in that the positioning pin (3) receives two preferably opposing clamping hooks (6), in particular receives two identically formed clamping hooks (6).
9. Device (1) according to either of Claims 7 and 8, characterized in that the respective clamping hook (6) has a recess (8), in particular on the side facing the housing (2) or on the side facing away from the housing (2), wherein the recess (8) receives the restoring means (7), in particular the restoring means (6) formed as a helical spring or shaft ring, in particular the respective recess (8) is formed adjacent to a wall (9) of the positioning pin (3), preferably the wall (9) covers the respective recess (8) .
10. Device (1) according to one of Claims 7 to 9, characterized in that two remote ends (39) of the restoring means (7) are formed as angled in relation to the transversal direction (X) and the one end (39) is arranged in a recess (40) of the one clamping hook (6) and the other end is arranged in a recess (40) of the other clamping hook (6).
11. Device (1) according to one of Claims 1 to 10, characterized in that the device (1) has an axially displaceable bearing element (10), the bearing element (10) interacts with the drive unit (11), wherein the positioning pin (3) is releasably connected to the bearing element (10), in particular the device (1) has connecting means (18) for connecting the positioning pin (3) and the bearing element (10).
12. Device (1) according to Claim 11, characterized in that the bearing element (10) receives the stop pin (4), in particular the stop pin (4) forms a linear guide for the bearing element (10).
13. Device (1) according to one of Claims 1 to 12, characterized in that the positioning pin (3) or the bearing element (10) is connected to the drive unit (11), in particular to a piston rod (23) of the drive unit (11), by way of a toggle-lever joint arrangement (12, 13) .
14. Device (1) according to Claim 13, characterized in that the toggle-lever joint arrangement (12, 13) has a lever (12) with a guide groove (14), wherein the bearing element (10) or the positioning pin (3) are mounted displaceably in the guide groove (14), preferably the guide groove (14) is formed as a slot and a bearing bolt (15) of the bearing element (10) or of the positioning pin (3) passes through the guide groove (14).
15. Device (1) according to Claim 13 or 14, characterized in that the lever (12) passes through the bearing element (10) or the positioning pin (3).
16. Device (1) according to one of Claims 1 to 15, characterized in that the stop pin (4) is fixedly mounted in the housing (2) by means of another bearing bolt (16), preferably the other bearing bolt (16) passes through a slot (29) of the bearing element (10) or of the positioning pin (3) that is formed in the axial direction (Z).

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