EP3299125A1 - Device for pivoting, tensioning or positioning workpieces - Google Patents

Abstract

The invention relates to a device (1) for pivoting, clamping or positioning of workpieces, a housing (2) and a in the housing (2) by means of a drive unit (3) in the axial direction (Z) movable rod (4) for actuating an arm (31), in particular for pivoting a clamping arm or swivel arm, having. The rod (4) has a first rod element (5) and a second rod element (6) displaceably mounted in the first rod element (5) in the axial direction (Z). The second rod member (6) has in the axial direction (Z) spaced locking means which are engageable with a locking means of a detent body (9), wherein the detent body (9) in the first rod member (5) in one of the axial Direction (Z) is mounted displaceably transversal direction. In the device (1) is further provided that the detent body (9) is displaceable in the transverse direction by turning a screwed into a threaded bore of the detent body (9) actuating means, wherein the actuating means passes through the detent body (9) and the actuating means at Turning in a rotational direction for engaging the latching means with a first end on the second rod member (6) is supported.

Description

The invention relates to a device for pivoting, clamping or positioning of workpieces, which has a housing and a movable in the housing by means of a drive unit in the axial direction rod for actuating an arm, in particular for pivoting a clamping arm or pivot arm. The rod has a first rod element and a second rod element mounted displaceably in the axial direction in the first rod element. The second rod member has spaced apart in the axial direction formed locking means which can be brought into engagement with a locking means of a detent body, wherein the detent body is slidably mounted in the first rod member in a direction transverse to the axial direction.

Such a device is, for example, a swivel for swiveling workpieces, in particular body components in the motor vehicle industry. In such a designed swivel a tilt angle of the cooperating with the rod pivot arm is adaptable by a change in length of the rod by means of displacement of the second rod member.

A device of the type mentioned, thus having the features of the preamble of claim 1 is from the document US Pat. No. 6,616,133 B1 known.

Furthermore, from the document US Pat. No. 6,416,045 B1 a clamping device is known, wherein the clamping device comprises a variable-length piston rod, wherein the respective length of the piston rod corresponds to a pivoting angle of a clamping arm of the clamping device.

Object of the present invention is to develop a device of the type mentioned in such a way that the connection between the first rod member and the second rod member is particularly stable upon engagement of the locking means and thus an unintentional change in length or even complete release of the locking means is prevented. Furthermore, the device should allow a particularly simple and safe operation of the detent body.

This object is achieved by a device having the features of claim 1.

In the apparatus, it is provided that the latching body is displaceable in the transverse direction by turning an adjusting means screwed into a threaded bore of the latching body, wherein the adjusting means passes through the latching body and the adjusting means engage in rotation in a direction of rotation for engaging the latching means a first end on the second rod member is supported.

The device thus makes it possible to move the locking body in the transverse direction by means of rotating the actuating means, for example by means of a tool, in particular a screwdriver, screw or Allen key, thus engaging the locking means of the locking body with the locking means of the second rod member bring. By supporting on the second rod member and the transverse displacement, which is achieved via the thread, large forces can be applied in a simple manner in order to bring the locking means into engagement. The formation of the locking body with the screwed adjusting means thereby enables a particularly stable and in particular play-free connection of the rod elements, so that a change in length of the rod or a release of the rod elements is hindered from each other even with large forces acting on the rod elements or forces acting on the rod elements vibrations or vibrations.

With regard to an unintentional release of the engaged locking means, it is considered particularly advantageous if, in a position of the locking body, in which the locking means are engaged, the adjusting means and a portion of the locking body contact the second rod member on opposite sides. In such a state, the second rod member in the transverse direction is clamped between the locking body and the actuating means, so that an unintentional displacement of the locking body, for example due to vibration or vibration of the device is prevented in the transverse direction with respect to the second rod member.

Preferably, the second rod element has a groove formed in the axial direction on a side facing the actuating means, the groove receiving the first end of the actuating means. In such a design of the device twisting of the second rod member is prevented by the adjusting means. In addition, a lateral deflection of the actuating means upon contacting the second rod member is prevented by the groove. The transverse displacement of the actuating means can also be guided by the orientation of the groove in such a way that the actuating means is supported centrally on the second rod element or the actuating means centrally contacts the second rod element.

In a particularly preferred embodiment of the device, the adjusting means is supported when rotating in a different direction of rotation for disengaging the locking means on the housing. By virtue of this configuration, in order to disengage the latching means, large forces can also be transmitted in the transversal direction by turning the screw onto the latching body in order to release the connection between the rod elements in this way.

In this context, it is considered to be particularly advantageous if the adjusting means is arranged at a contacting of the second rod member spaced from the housing. In such an embodiment of the device, for the purpose of disengaging the latching means, the actuating means in the other Rotated direction of rotation, whereby the adjusting means shifts in the transverse direction with respect to the detent body until the actuating means rests against the housing. Upon further rotation of the actuating means in this direction of rotation of the locking body is moved in the corresponding opposite transverse direction, whereby the locking means are disengaged. For the purpose of engaging the locking means, the adjusting means is rotated in the one direction of rotation and thus displaced in the transverse direction with respect to the detent body until the actuating means rests with its first end on the second rod member. Upon further rotation of the actuating means in this direction of rotation of the locking body is displaced in the transverse direction, that the locking means come into engagement.

By the distance between the actuating means and the housing in a contacting of the second rod member is ensured that the axial movement of the rod is not hindered by the actuating means, in particular by a friction or abutment of the actuating means on the housing.

In a preferred embodiment of the device, the second rod element is designed as a toothed rack, wherein the toothing forms the latching means. Preferably, the second rod element on two opposite side surfaces has a toothing, wherein it is provided in particular that the two serrations are formed inclined to each other.

Due to the inclination of the serrations to each other, the locking body and the second rod element act in self-centering when engaging the locking means. Furthermore, a game between the second rod member and the detent body is minimized by the inclination of the toothings.

In an advantageous development, the adjusting means is designed as a screw, wherein in particular a first end opposite the second end of the actuating means is designed as a screw head.

In this context, it is considered advantageous if between the second end of the actuating means designed as a screw head and the detent body, a spring, which is preferably designed as a plate spring, in particular as a cup spring package, is arranged. This prevents unintentional movement or rotation of the actuating means.

In order to secure the adjusting means against unintentional rotation, the device has in an advantageous development of a locking means for rotation of the actuating means, wherein the locking means in a position of the detent body in which the locking means are engaged, non-positively and / or positively with the detent body or the rod interacts. In this case, the blocking means is mounted in the adjusting means, preferably screwed into the screw head of the screw designed as actuating means. The blocking means may be, for example, a grub screw.

In order to allow a particularly simple operation of the actuating means, in particular in a mounted state and without opening the housing, the housing in an advantageous development of an access opening, wherein the actuating means is disposed in an end position of the arm adjacent to the access opening. This makes it possible to use the adjusting means without great effort, in particular without disassembly of the device. For example, a screwdriver or a hexagon key can be inserted into a screw head of the actuating means and rotated in the appropriate direction. Preferably, in this end position of the arm, a toggle lever assembly cooperating with the arm is in an unlocked state.

In order to prevent foreign objects, for example dust or liquids, from penetrating through the access opening into the interior of the device, provision is made in particular for the device to have a cover for the access opening.

In an advantageous development, the device has a locking device formed in the first locking means which is displaceable according to the displacement of the locking body. The first rod member has a second locking means, wherein the two locking means in a position of the detent body, in which the locking means are disengaged, are engaged. The interaction of the two locking means prevents the latching body in disengaged locking means and thus in a state in which an axial displacement of the second rod member in the first rod member is intended so shifts in the transverse direction, that the locking means undesirable engage and prevent displacement of the second rod member in the first rod member.

It is considered particularly advantageous in this connection if the latching body has two opposite first locking means and the first rod element has two opposite second locking means.

Preferably, the second locking means on a return means and a displaceably mounted in a direction opposite to the axial direction transverse locking member, wherein a displacement of the locking element outwards against the restoring force of the return means. The first locking means is formed by a formed on a second locking means facing side of the detent body return.

Preferably, the locking body is formed as a sleeve, wherein the second rod member passes through a through hole of the sleeve, the through hole has a first portion and a second portion, wherein the second rod member is axially slidably mounted in the first portion and the second portion has a plurality of locking means. In this context, it is particularly provided that in a blocked state of the rod, in which a displacement of the rod elements to each other by the cooperating locking means is prevented, a plurality of locking means of the locking body with a plurality of locking means of the second rod member are engaged. This is the connection of Rod elements particularly stable against axial and transverse forces.

Preferably, the first portion and the second rod member are designed such that a rotation of the second rod member is prevented about an axis of rotation formed in the axial direction. This can be done, for example, in that adjacent side surfaces of the latching body and the second rod member are formed flat.

In order to achieve a self-centering of the second rod member and the detent body and the smallest possible clearance between these components, it is provided in an advantageous development that the second rod member and / or the detent body, in particular the through hole of the detent body has two opposite and inclined mutually formed side surfaces , The second rod element and / or the passage opening of the latching body preferably has a cross section that tapers in the transverse direction, in particular a conically tapered cross section.

In a particularly preferred embodiment, the first rod element at least one, preferably four in the axial direction acting on the locking body supporting means. Preferably, the support means is designed as a screwed end face in the first rod member screw. By means of the support means, an axial displacement of the latching body relative to the first rod element in the axial direction can be prevented. As a result, the support means makes it possible to support the detent body in the first rod element in the axial direction as free of play as possible.

Preferably, the device is designed as a swivel with a pneumatic drive unit, wherein the drive unit comprises a cylinder and a displaceable in the axial direction in the cylinder piston, wherein the piston cooperates with the rod.

In order to minimize the mechanical load on the device and / or the workpieces when pivoting workpieces, the device has a damping device. In order to ensure damping at different lengths of the rod, the damping device is arranged in the cylinder of the drive unit, and has a sealing body for an outlet of the cylinder. This sealing body is displaceably mounted in the axial direction counter to a restoring force of a spring mounted in the piston. This ensures that the sealing body largely independent of the length of the rod closes the outlet of the cylinder with a corresponding displacement of the piston before reaching one of the end positions of the pivot arm. As a result, an escape of a fluid located in a cylinder section adjacent to the outlet is throttled, whereby a pressure builds up in this section, which counteracts the movement of the piston and thus reduces the displacement speed of the piston. This dampens the displacement of the piston and consequently the pivotal movement of the arm. In order to achieve a throttled escape of the fluid upon interaction of the sealing body with the outlet, it is quite conceivable that the sealing body only partially closes the outlet and thus a throttled escape of the fluid through the outlet is possible. The cylinder may also have one or more throttle outlets through which the fluid can escape from the cylinder when the sealing body interacts with the outlet.

In addition, it is provided that the device designed as a swivel comprises a braking device, wherein the braking device has a rotatably mounted shaft and braking means for braking the rotation of the shaft, wherein a thread of the shaft cooperates with a displacement of the rod with a thread of the rod. By the braking means, the rotation of the shaft can be braked or prevented, whereby the pivotal movement of the pivot arm can be safely braked even at high loads, for example, when pivoting a workpiece with high weight. Preferably, the braking device is controllable by means of a control device.

But it is also quite conceivable that the device has no such braking device.

The change in the swivel angle or the swivel angle of a device designed as a swivel can for example be such that the locking means of the second rod member and the locking means of the detent body are disengaged by rotating the actuating means, whereby a displacement of the second rod member in the first rod member is made possible , It is quite conceivable that in this state, however, a certain static friction between the second rod member and the first rod member and / or the detent body is made difficult to move the rod elements in unblockten state of the rod. In order to change the length of the rod, an axial force must act on one of the rod elements from the outside in order to displace it with respect to the other rod element.

The displacement of the rod member may be such that, when disengaged locking means of the pivot arm of the device is pivoted manually, whereby the cooperating with the pivot arm rod member moves relative to the other rod member in the axial direction. Following this, the latching means of the latching body and the latching means of the second rod element can be brought back into engagement by turning the actuating means in the other direction of rotation and corresponding displacement of the latching body in order to block the rod.

Preferably, the device comprises a toggle joint assembly, the rod cooperating with the arm via the toggle joint assembly to actuate the same. For example, the rod, preferably the second rod member is connected via a fork rod with the toggle lever assembly. The connection of the fork rod with the rod can be done by means of a fork rod and the rod passing through bolt. Preferably, the bolt passes through the fork rod in a direction transverse to the axial direction, especially in the other transversal direction. This prevents rotation of the rod about an axis of rotation formed in the axial direction.

Further features of the invention are set forth in the subclaims, the description of the figures and in the figures themselves, wherein it is noted that all individual features and all combinations of individual features are essential to the invention.

In the figures, the invention is illustrated by means of several embodiments, without being limited to the described embodiments.

Fig. 1

ein erstes Ausführungsbeispiel der Vorrichtung, vorliegend einen pneumatisch antreibbaren Schwenker, mit einer auf eine erste Länge eingestellten längenveränderbaren Stange in einer ersten Endstellung eines Schwenkarms in einer Schnittansicht,

Fig. 2

die Vorrichtung gemäß Fig. 1 in einer zweiten Endstellung des Schwenkarms in einer Schnittansicht,

Fig. 3

die Vorrichtung gemäß Fig. 1 mit der auf eine zweite Länge eingestellten längenveränderbaren Stange in der ersten Endstellung des Schwenkarms in einer Schnittansicht,

Fig. 4

die Vorrichtung gemäß 3 in der zweiten Endstellung des Schwenkarms in einer Schnittansicht,

Fig. 5

die längenveränderbare Stange in einem geblockten Zustand in einer perspektivischen Ansicht,

Fig. 6

einen Ausschnitt der Stange gemäß dem strichpunktierten Kreis in Fig. 5,

Fig. 7

die Vorrichtung in einem Zustand gemäß Fig. 5 in einer Schnittansicht, gemäß der Linie VII-VII in Fig. 12,

Fig. 8

die Stange gemäß Fig. 5 in einem entblockten Zustand in einer perspektivischen Ansicht,

Fig. 9

einen Ausschnitt der Stange gemäß dem strichpunktierten Kreis in Fig. 8,

Fig. 10

die Stange gemäß Fig. 8 in einer Schnittansicht, wie in Fig. 7,

Fig. 11

eine Schnittansicht der Stange gemäß der Linie XI-XI in Fig. 13,

Fig. 12

einen Ausschnitt der Vorrichtung gemäß dem strichpunktierten Kreis in Fig. 1 in einer Schnittansicht gemäß der Linie XII-XII in Fig. 7,

Fig. 13

die Stange in einer Ansicht gemäß dem Pfeil XIII in Fig. 11,

Fig. 14

einen Rastkörper und ein zweites Stangenelement in einer Schnittansicht,

Fig. 15

den Rastkörper in einer Schnittansicht wie in Fig. 14,

Fig. 16

das zweite Stangenelement in einer Schnittansicht wie in Fig. 14,

Fig. 17

den Rastkörper in einer perspektivischen Ansicht,

Fig. 18

ein erste Stangenelement in einer perspektivischen Ansicht,

Fig. 19

das zweite Stangenelement in einer perspektivischen Ansicht,

Fig. 20

die Vorrichtung mit einer von einer Zugangsöffnung entfernten Abdeckung in einer perspektivischen Ansicht,

Fig. 21

einen Ausschnitt der Vorrichtung gemäß dem strichpunktierten Kreis in Fig. 20,

Fig. 22

ein zweites Ausführungsbeispiel der Vorrichtung, vorliegend einen pneumatisch antreibbaren Schwenker, in der zweiten Endstellung des Arms in einer Schnittansicht.

Show it:

Fig. 1

a first embodiment of the device, in this case a pneumatically driven swivel, with a length-adjustable rod set to a first length in a first end position of a pivoting arm in a sectional view,

Fig. 2

the device according to Fig. 1 in a second end position of the swivel arm in a sectional view,

Fig. 3

the device according to Fig. 1 with the length-adjustable rod set to a second length in the first end position of the swivel arm in a sectional view,

Fig. 4

3 in the second end position of the swivel arm in a sectional view,

Fig. 5

the length-adjustable rod in a blocked state in a perspective view,

Fig. 6

a section of the rod according to the dash-dotted circle in Fig. 5 .

Fig. 7

the device in a state according to Fig. 5 in a sectional view taken along line VII-VII in FIG Fig. 12 .

Fig. 8

the rod according to Fig. 5 in a unblocked state in a perspective view,

Fig. 9

a section of the rod according to the dash-dotted circle in Fig. 8 .

Fig. 10

the rod according to Fig. 8 in a sectional view, as in Fig. 7 .

Fig. 11

a sectional view of the rod according to the line XI-XI in Fig. 13 .

Fig. 12

a section of the device according to the dash-dotted circle in Fig. 1 in a sectional view along the line XII-XII in Fig. 7 .

Fig. 13

the rod in a view according to the arrow XIII in Fig. 11 .

Fig. 14

a locking body and a second rod element in a sectional view,

Fig. 15

the locking body in a sectional view as in Fig. 14 .

Fig. 16

the second rod element in a sectional view as in Fig. 14 .

Fig. 17

the locking body in a perspective view,

Fig. 18

a first rod element in a perspective view,

Fig. 19

the second rod element in a perspective view,

Fig. 20

the device with a cover removed from an access opening in a perspective view,

Fig. 21

a section of the device according to the dash-dotted circle in Fig. 20 .

Fig. 22

A second embodiment of the device, in this case a pneumatically driven swivel, in the second end position of the arm in a sectional view.

The Fig. 1 to 4 show a device 1 for pivoting workpieces. A pivotable about an axis 36 pivot arm 31 is connected via a toggle lever assembly 35 with a movable in a housing 2 of the device 1 in the axial direction Z rod 4. The rod 4 is operated by means of a pneumatic drive unit 3, wherein the pneumatic drive unit 3 has a cylinder 34 and a piston 33 movable in the cylinder 34.

In order to allow a change in length of the rod 4, the rod 4, a first rod member 5 and a displaceable in the axial direction Z in the first rod member 5 mounted second rod member 6, wherein the rod 4 via a connected to the second rod member 6 fork rod 48th is connected to the toggle joint assembly 35. The connection of the fork rod 48 with the second rod member 6 and the connection between the fork rod 48 and the toggle joint assembly 35 takes place in each case by means of a fork rod 48 and the toggle joint assembly 35 and the fork rod 48 and the second rod member 6 passing through bolt 49. The bolt passes through 49 associated with the toggle link assembly 35, the fork rod 48 and a component of the toggle link assembly 35 in a direction transverse to the axial direction Z X and the bolt 48 associated with the second rod member 6, the second rod member 6 and the fork bar 48 in one to the axial direction Z other transverse direction Y by the connection of the second rod member 6 and the fork rod 48 by means of of the bolt 49 passing through in the other transverse direction Y, rotation of the second rod member 6 about an axis of rotation formed in the axial direction Z is prevented.

In order to prevent a change in length of the rod 4, in particular during operation of the device 1, in the first rod member 5 a displaceable in the axial direction Z transverse latching body 9 is mounted, said latching body 9 has latching means 8, which with latching means 7 of the second rod member 6 are engageable.

In a blocked state of the rod 4, the locking means 7, 8 are engaged and thus prevents displacement of the second rod member 6 in the first rod member 5 by the locking body 9. In a deblocked state of the rod 4, the locking means 7, 8 are disengaged, whereby a displacement of the second rod member 6 in the first rod member 5 and thus a change in length of the rod 6 is possible, which leads to a change in a pivot angle α of the device 1.

As in particular the Fig. 7 and 10 can be seen, the locking body 9 is displaceable by rotating a screwed into a threaded bore 39 of the locking body 9 actuating means 14 in the transverse direction X, wherein the adjusting means 14 passes through the locking body 9.

The Fig. 7 shows the rod in a blocked state and thus in a position of the locking body 9, in which the locking means 7, 8 are engaged. The Fig. 10 shows the rod 4 in a unblocked state.

In order to transfer the rod 4 from the unblocked state to the blocked state, the adjusting means 14 is rotated in a direction of rotation for engaging the locking means 7, 8, wherein when rotating in this direction of rotation, the actuating means 14 with a first end 15th is supported on the second rod member 6, whereby from the rotation of the actuating means 14, a transverse displacement of the Detent body 9 with respect to the rod 4 results and the locking means 7, 8 come into engagement.

To unblock the rod 4, the adjusting means 14 is supported when rotating in another direction for disengaging the locking means 7, 8 with a first end 15 opposite the second end 16 of the housing 2 from, as in Fig. 10 shown. In the present case, the adjusting means 14 is designed as a screw, wherein a screw head 16 of the screw forms the second end 16 of the actuating means 14.

As in particular the Fig. 7 and 10 can be seen, the adjusting means 14 at a contacting of the second rod member 6 spaced from the housing 2 and at a contacting of the housing 2, the first end 15 spaced from the second rod member 6, whereby upon rotation of the actuating means 14 for blocking or Unblocking the rod 4, the adjusting means 14 is first displaced by a certain distance in the transverse direction until it rests against the second rod element 6 or on the housing 2 and is supported on the second rod element 6 or on the housing 2 during further rotation , resulting in a linear displacement of the detent body 9 in the transverse direction X results.

The locking body 9 is formed as a sleeve, wherein the second rod member 6 passes through a through hole 10 of the sleeve. The passage opening 10 has a first portion 11 and a second portion 12, wherein the second rod member 6 is axially displaceable in the first portion 11 and mounted against rotation about a formed in the axial direction Z axis of rotation. The second section 12 has a plurality of latching means 8, which can be brought into engagement with a plurality of latching means 7 of the second rod element 6.

Both the second rod element 6 and the latching body 9 each have two opposite and inclined mutually formed side surfaces 22, wherein the inclination of the side surfaces 22 is formed by the fact that both the Rod member 6 and the through hole 10 of the locking body 9 in the respective section 11, 12 have a conically tapered in the transverse direction X cross section, as in particular the Fig. 14 to 16 can be seen. This design of the detent body 9 and the second rod member 6 causes a self-centering of the detent body 9 and the second rod member 6 in a transverse displacement of the detent body 9 for engaging the detent means 7, 8. In addition, by this shape of the detent body 9 and second rod member 6 reduces the transverse play between the second rod member 6 and the detent body 9.

In addition, in the unblocked state by the adjacent to the side surfaces 22 of the second rod member 6 side surfaces 22 of the first portion 11 prevents rotation of the rod member 6 about a formed in the axial direction Z axis of rotation.

In the blocked state of the rod 4 contact both the adjusting means 14 and a portion of the locking body 9, the second rod member 6 on opposite sides, whereby the second rod member 6 in the transverse direction X between the locking body 9 and the actuating means 14 clamped and thus prevents inadvertent displacement of the locking body 9 in the transverse direction X and a transverse clearance is minimized.

In order to prevent twisting of the second rod element 6 and / or avoidance of the actuating means 14 during rotation for blocking the rod 4, in particular, the second rod element 6 has a groove 17 formed in the axial direction Z on a side facing the actuating means 14, wherein the Groove 17, the first end 15 of the actuating means 14 receives.

In order to achieve a high mechanical stability of the rod 4, in particular against forces acting in the axial direction Z, both the second rod element 6 and the latching element 9 each have a plurality of locking means 7, 8 spaced apart in the axial direction on two opposite side surfaces 22 on, in the blocked state of the rod 4 a plurality of locking means 7 of the second rod member 6 with the locking means 8 of the locking body 8 are engaged.

The second rod member 6 is formed as a rack with two opposing teeth 13, wherein the respective teeth 13, the locking means 7 of the second rod member 6 forms and the two serrations 13 are formed inclined to each other for self-centering.

In order to prevent unintentional rotation of the actuating means 14, the device 1 has two safety devices.

On the one hand, a spring 27 is arranged between the second end 16, designed as a screw head, of the adjusting means 14 designed as a screw and the detent body 9, which spring is designed as a disc spring assembly.

On the other hand, the device 1 has a blocking means 24 for preventing rotation of the actuating means 14. This locking means 24 is formed by a screwed into the screw head 16 of the adjusting means 14 grub screw, the grub screw in the blocked state of the rod 4 to the locking body 9 frictionally applied and thus prevents unintentional rotation of the actuating means 14. This condition is in the Fig. 7 shown.

In order to disengage the latching means 7, 8 and thus unblock the rod 4, it is first necessary to release this grub screw in order to allow the adjusting means 14 to rotate.

In order to prevent that the locking body 9 shifts unintentionally in a deblocked state of the rod 4 without the action of the actuating means 14 and thus the locking means 7, 8 unintentionally engage, the locking body 9 has two opposite first locking means 18 and first rod member 5 two opposite second locking means 19, wherein the respective first locking means 18 in a position of the locking body 9, in which the locking means 7, 8 are disengaged, with each one of the second locking means 19 is engaged.

The second locking means 19 each have a return means 20 and a locking member 21 slidably mounted in the transverse direction Y to the other axial direction Z, wherein a displacement of the locking member 21 outwardly against the restoring force of the return means 20 takes place. The first locking means 18 of the locking body 9 is formed by a formed on a second locking means 19 side facing the locking body 9 recess. By the interaction of the locking means 18, 19 in the unblocked state of the rod 4 unintentional displacement of the detent body 9 is prevented, so that the unblockte state even with vibration or other external forces, for example due to a force to move the second rod member 6 in the first Rod element 5, is held.

Furthermore, by the action of the first locking means 19 on the detent body 9 in a blocked state of the device 1, the play of the detent body 9 in the other transverse direction Y is minimized.

In order to minimize the play of the detent body 9 in the axial direction Z, four trained as a grub screw support means 23 are screwed into the first rod member 5 frontally, said support means 23 acting in the axial direction Z on the detent body 9. The latching body 9 is supported on the support means 23, whereby a displacement of the latching body 9 with respect to the first rod member 5 in the axial direction Z is prevented.

By changing the length of the rod 4 by moving the second rod member 6 in the first rod member 5, the pivot angle α of the pivot arm 31 of the device can be adjusted. The Fig. 1 to 4 show the device 1 with two different rod lengths and thus two different pivot angles α, wherein the Fig. 1 and 2 the device 1 with a first rod length in different end positions of the arm 31 and the Fig. 3 and 4 show the device in the corresponding end positions with a second rod length. The show FIGS. 1 and 3 each a first end position of the pivot arm 31 and the Figures 2 and 4 in each case a second end position of the pivot arm 31st

The in the Fig. 2 and 4 illustrated second end position of the pivot arm 31 corresponds to a state in which the toggle lever assembly 35 is locked and thus prevents the pivot arm 31 is pivoted in the event of failure of the drive unit 3. This second end position of the pivot arm 31 is independent of the length of the rod 4th

The in the Fig. 1 and 3 shown first end position of the pivot arm 31 corresponds to a state of the device 1, in which the piston 33 of the pneumatic drive unit 3 is driven down to a maximum and abuts a bottom 47 of the cylinder 34. The pivot angle α for pivoting the pivot arm 31 from the first end position to the second pivot position depends on the length of the rod 4.

The rod length of the in the Fig. 1 and 2 illustrated device 1 is opposite to in the Fig. 3 and 4 shown device 1 shortened. The resulting swivel angle α of the device 1 is 100 °, wherein a swivel angle α of 0 ° corresponds to a state in which a table 32 connected to the swivel arm 31 is aligned parallel to the axial direction Z, as shown in FIG Fig. 2 is shown by the dashed line.

An enlargement of the rod length corresponds to a reduction of the swivel angle α. This is especially a comparison of Fig. 1 with the Fig. 3 can be seen, wherein the pivot angle α in the Fig. 1 100 ° and in the Fig. 3 25 °.

In the first end position of the pivot arm 31, which in the FIGS. 1 and 2 is shown, the adjusting means 14 is independent of the length of the rod 4 adjacent arranged on an opening formed in the housing 2 access opening 25, so that the adjusting means 14 can be operated from the outside, for example by means of a screwdriver or wrench without dismantling the device 1 or to open the housing 2. The Fig. 7 and 10 show the device 1 in this first end position of the pivot arm 31 in a sectional view.

How the particular Fig. 10 it can be seen, the screw head 16 and the access opening 25 are dimensioned such that the screw head 16 for unblocking the rod 4 is supported with an edge region on an adjacent to the access opening 25 region of the housing 2.

In order to prevent foreign bodies, for example dust or liquids, from penetrating into the interior of the device 1, the access opening 25 has a cover 26, wherein this cover 26 can be screwed into the housing 2.

Depending on the pivot angle α or of the length of the rod 4, the stroke of the piston 33 for the purpose of pivoting the pivot arm 31 from the first to the second end position varies in length. For example, the stroke is in the Fig. 1 and 2 greater than the stroke of the in the Fig. 3 and 4 , In order to achieve a damping of the pivoting movement of the pivoting arm 31 largely independently of the set pivot angle α or the set rod length, a damping device 40 is arranged in the cylinder 34 of the pneumatic drive unit 3. The damping device 40 has a counter to a restoring force of a spring 42 mounted in the piston 33 in the axial direction Z slidably mounted sealing body 41. When moving the piston 33 in the axial direction Z upwards, the sealing body 41 closes an outlet of the cylinder 34 after a certain distance of the piston 33, whereby an escape of air from the cylinder 34 is throttled, resulting in a damping of the stroke movement of the piston 33 and thus the pivoting movement of the pivot arm 31 leads.

To ensure safe pivoting of workpieces, in particular of workpieces with a high weight, for example, with a weight of about 100 kg, too ensure the device 1, a braking device 38. In order to brake the displacement of the rod 4 and thus the pivoting movement of the pivot arm 31, a rotatably mounted shaft 37 is arranged such that upon displacement of the rod 4, a thread 45 of the shaft 37 cooperates with a thread 46 of the rod 4. As a result, the shaft 37 is displaced during a displacement of the rod 4 in a rotation. In order to brake the rotation of the shaft 37, the braking device 40 has braking means 44, wherein the braking means 44 are externally controllable to brake the rotation of the shaft 37 more or less or to block a rotation of the shaft 37, whereby the Displacement of the rod 4 and thus the pivotal movement of the pivot arm 31 is braked or blocked.

However, it is also conceivable that the device 1 has no such braking device 38. For example, in a device 1 for pivoting workpieces which have a low weight, for example a weight of 2 kg, a braking device 38 can be dispensed with. Such an embodiment of the device 1 shows the Fig. 22 ,

Furthermore, the device 1 has an interrogator 28 for determining the position of the rod 4 and thus for determining the position of the pivot arm 31. For this purpose, the interrogator 28 comprises a sensor unit for detecting the position of an actuator 29, wherein the actuator 29 has a run from the housing 2 approach 30 and this approach 30 cooperates with the sensor unit. For example, the sensor unit has an optical sensor, the projection 30 covering the sensor in the first end position of the swivel arm 31 and not covering the sensor in the second end position of the swivel arm 31.

The position of the actuator 29 corresponds to the position of the rod 4, the rod 4 for the purpose of switching the actuator 29 has two switching elements 43, wherein one of the switching elements 43 with the first rod member 5 and the other switching element 43 present on the fork rod 48 with the second bar member 6 is mechanically connected and the two switching elements 43 interact mechanically with the actuating part 29.

This arrangement of the switching elements 43 ensures that the switching elements 43 cooperate with the setting part 29 in such a way that the position of the setting part 29 corresponds to the first or second end position of the pivoting arm 31, irrespective of the length of the rod 4.

To change the pivot angle α of the device 1, the pivot arm 31 is first moved into the second end position, then the locking means 24 is released and the rod 4 by displacement of the locking body 9 by turning the actuating means 14 unblocked. Following this, the adjustment of the desired swivel angle α can be effected by manual swiveling of the swivel arm 31, for example manually. Finally, the latching means 7, 8 are brought into engagement by rotating the actuating means 14 in the other direction of rotation and thus the rod 4 blocked again.

LIST OF REFERENCE NUMBERS

1

device

2

casing

3

drive unit

4

pole

5

first rod element

6

second rod element

7

latching means

8th

latching means

9

latching body

10

Through opening

11

first section

12

second part

13

Perforation

14

actuating means

15

first end

16

second end / screw head

17

groove

18

first locking means

19

second locking means

20

Return means

21

locking

22

side surface

23

proppant

24

Spacer / barrier means

25

access opening

26

cover

27

feather

28

interrogator

29

adjusting part

30

approach

31

swivel arm

32

table

33

piston

34

cylinder

35

Toggle lever arrangement

36

axis

37

wave

38

braking means

39

threaded hole

40

attenuator

41

sealing body

42

feather

43

switching element

44

braking means

45

thread

46

thread

47

ground

48

fork rod

49

bolt

Z

axial spatial direction

X

transverse spatial direction

Y

other transverse spatial direction

α

swivel angle

Claims (15)

Device (1) for swiveling, clamping or positioning workpieces, comprising a housing (2), a rod (4) movable in the housing (2) in the axial direction (Z) by means of a drive unit (3) for actuating an arm (31 ), in particular for pivoting a clamping arm or swivel arm, wherein the rod (4) has a first rod element (5) and a second rod element (6) displaceably mounted in the first rod element (5) in the axial direction (Z), the second rod element (5) 6) in the axial direction (Z) spaced locking means (7) which are engageable with a locking means (8) of a detent body (9) into engagement, wherein the detent body (9) in the first rod member (5) in one of the axial direction (Z) transversal direction (X) is slidably mounted, characterized in that the detent body (9) by turning a threaded into a bore (39) of the detent body (9) screwed adjusting means (14) in the transverse direction (X ) is displaceable, wherein the adjusting means (14) passes through the locking body (9) and the adjusting means (14) when rotating in a rotational direction for engaging the locking means (7, 8) with a first end (15) on the second rod member (6) is supported. Device (1) according to claim 1, characterized in that in a position of the detent body (9) in which the latching means (7, 8) are engaged, the adjusting means (14) and a portion of the detent body (9) the second rod member (6) contact on opposite sides. Device (1) according to claim 1 or 2, characterized in that the second rod element (6) on a said actuating means (14) facing side in the axial direction (Z) formed groove (17), wherein the groove (17) the first end (15) of the actuating means (14) receives. Device (1) according to one of claims 1 to 3, characterized in that the adjusting means (14) when rotating in a different direction of rotation for disengaging the locking means (7, 8) on the housing (2) is supported, preferably the adjusting means (14) at a contacting of the second rod member (6) spaced from the housing (2) is arranged. Device (1) according to one of claims 1 to 4, characterized in that the second rod element (6) is designed as a toothed rack, wherein the toothing (13) the latching means (7), preferably the second rod member (6) on two opposite Side surfaces (22) has a toothing (13), in particular the two toothings (13) are formed inclined to each other. Device (1) according to one of claims 1 to 5, characterized in that the adjusting means (14) is designed as a screw, in particular a screw head (16) has a first end (15) opposite the second end (16) of the actuating means (14). forms. Device (1) according to claim 6, characterized in that between the screw head (16) formed as the second end (16) of the screw designed as actuating means (14) and the detent body (9) a spring (27), preferably as a plate spring, is designed in particular as a plate spring package is arranged. Device (1) according to one of claims 1 to 7, characterized in that the device (1) has a locking means (24) for rotation of the actuating means (14), in particular the locking means (24) in the adjusting means (14) mounted, preferably in the screw head (16) of the screw designed as actuating means (14) is screwed, wherein the locking means (24) in a position of the detent body (9), in which the Locking means (7, 8) are engaged, non-positively and / or positively connected with the locking body (9) or the rod (4) cooperates. Device (1) according to one of claims 1 to 8, characterized in that the housing (2) has an access opening (25), wherein the adjusting means (14) in an end position of the arm (31), preferably in an end position of the arm ( 31) in which a toggle joint arrangement (35) cooperating with the arm (31) is unlocked, is disposed adjacent to the access opening (25), in particular the device (1) has a cover (26) for the access opening (25). Device (1) according to one of claims 1 to 9, characterized in that the device (1) in the latching body (9) formed first locking means (18) which is displaceable according to the displacement of the detent body (9), and first rod member (5) has a second locking means (19), wherein the two locking means (18, 19) in a position of the latching body (9) in which the latching means (7, 8) are disengaged, in particular, the Catch body (9) has two opposite first locking means (18) and the first rod member (5) has two opposite second locking means (19). Device (1) according to claim 10, characterized in that the second locking means (19) has a restoring means (20) and a locking element (21) displaceably mounted in a transverse direction (Y) to the axial direction (Z) and the first one Locking means (18) formed by a on a second locking means (19) facing side of the latching body (9) formed recess, wherein a displacement of the locking element (21) outwards against the restoring force of the return means (20). Device (1) according to one of claims 1 to 11, characterized in that the latching body (9) is designed as a sleeve, wherein the second rod element (6) passes through a passage opening (10) of the sleeve, wherein the passage opening (10) has a first Section (11) and a second portion (12), wherein the second rod member (6) in the first portion (11) is axially displaceable and the second portion (12) has a plurality of latching means (8), preferably the rod member (6 ) against rotation about a rotational axis formed in the axial direction (Z) formed in the first portion (11). Device (1) according to one of claims 1 to 12, characterized in that the second rod element (6) and / or the latching body (9), in particular the passage opening (10) of the latching body (9) has two opposite and inclined mutually formed side surfaces ( 22), preferably the second rod element (6) and / or the passage opening (10) of the latching body (9) has a tapering in the transverse direction (X), in particular a conical cross section. Device (1) according to one of claims 1 to 13, characterized in that the first rod element (5) at least one, preferably four in the axial direction (Z) on the latching body (9) acting support means (23), preferably the support means ( 23) is formed as a frontally screwed into the first rod member (5) screw. Device (1) according to one of claims 1 to 14, characterized in that the device (1) as a swivel and the drive unit (3) as a pneumatic drive unit (3) with a in a cylinder (34) in the axial direction (Z) displaceable and with the rod (4) cooperating piston (33) is formed, the device (1) a Braking device (38) and a damping device (40), wherein the braking device (38) has a rotatably mounted shaft (37) and braking means (44) for braking the rotation of the shaft (37), wherein a thread (45) of the shaft ( 37) cooperates with a displacement of the rod (4) with a thread (46) of the rod (4), and the damping device (40) in the cylinder (34) of the drive unit (3) is arranged, wherein the damping device (40) has a sealing body (41) displaceably mounted in the axial direction (Z) for an outlet of the cylinder (34) against a restoring force of a spring (42) mounted in the piston (33).

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