EP2021151A1

EP2021151A1 - Clamping device

Info

Publication number: EP2021151A1
Application number: EP07722441A
Authority: EP
Inventors: Richard Kaiser; Peter Schauss
Original assignee: DE STA CO Europe GmbH; DESTACO Europe GmbH
Current assignee: DESTACO Europe GmbH
Priority date: 2006-05-17
Filing date: 2007-05-16
Publication date: 2009-02-11
Also published as: BRPI0711030A2; US20090224455A1; DE112007001674A5; DE102006022950A1; CN101472710A; US8162300B2; WO2007131499A1

Abstract

The invention relates to a clamping device comprising a top part (1) provided with an adjusting mechanism for a clamping arm that can be pivoted into a clamping position and an opening position on the top part (1), and a housing (7) carrying the top part (1) and comprising an inner region for receiving a linearly mobile adjusting rod which is connected to the adjusting mechanism (3) and to a drive arranged in the housing (7). According to the invention, the housing (7) is embodied as an extruded hollow profiled element (8), the inner region having a uniform inner cross-section over the entire length thereof.

Description

jig

BACKGROUND OF THE INVENTION

1. Field of the invention

The present invention relates to a clamping device according to the preamble of claim 1 for fixing workpieces and relates in particular to a clamping device with a pivotally mounted on a housing clamping arm, which can be brought by means of a actuated by a drive actuator in clamping position to be fixed workpiece and again can be swung back from this position.

2. Description of the Related Art

Clamping devices of the type mentioned are known in various embodiments. Such an embodiment according to DE 10 2005 005 340 A1 comprises a head piece with an adjusting mechanism for a pivotable on the head piece in clamping position and open position clamping arm and a head piece bearing housing with an interior for receiving a hand with the adjusting mechanism and on the other hand with a in the housing arranged drive connected, linearly adjustable control rod. A similar construction is also based on a clamping device according to US Pat. No. 5,118,088 A, the housing of which, including the head piece, is made of a profile piece into which different diameter bores are made in order to form a cylinder space for a piston drive of the control rod and also a guide for the smaller diameter piston rod and beyond a slightly larger diameter guide space for the Stellstangenende. In another embodiment of the clamping device according to Figure 18 of US 5,118,088 A is the housing also formed from one piece, which is drilled cylindrically except for a floor education left standing. The adjusting mechanism containing head piece, which is also arranged on the associated with the adjusting mechanism clamping arm, in this case has an appropriate in the cylindrical bore of the housing extension, which has about half the length of the housing and which serves to seal the cylinder space and to limit to guide the control rod. In both embodiments mentioned, the starting material for the housing is an extruded profile which corresponds to the outer shape of the housing of the clamping device and is intricately machined on the inside, ie an extruded profile made of solid material.

SUMMARY OF THE INVENTION

Starting from a clamping device with a pivotally mounted on a housing or on the head piece arranged clamping arm, which can be brought into the clamping position by means of a drive actuatable actuating mechanism to be fixed workpiece and can be pivoted back out of this position, the invention has the object To simplify the construction and production costs for such a clamping device.

This object is achieved according to the invention by the features listed in the characterizing part of patent claim 1.

According to the invention, it is thus provided that the housing is designed in the form of a hollow extruded profile, wherein the interior has a constant inner cross-section over its entire length.

In other words, falls according to the invention the whole, the prior art described above expense of subsequent drilling processing for the production of the interiors of the housing away, which is otherwise disproportionate to the requirements, cut to the appropriate length and in a sense the base component for such Clamps forming extruded hollow profile to its functional requirements, which are described in more detail in the specific part of the description adapt. Since there is a basic component for the creation of a clamping device with the cut to appropriate length and dimensioned extruded hollow profile, thus the advantageous possibility is created due to the available free space in the extruded hollow profile, to provide for the tensioning device to be formed from different drives for the movement of the control rod and also elements for the automatic detection of the clamping arm positions. Apart from that, different head pieces can be placed on the hollow profile, adapted only to the connection side to the hollow profile and configured to be connectable with their adjusting mechanism to the end of the control rod.

Other advantageous developments of the clamping device according to the invention will become apparent from the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The inventive clamping device including its advantageous developments according to the dependent claims will be explained in more detail with reference to the drawings of various embodiments.

Figure 1 shows a section through the clamping device according to the invention with the clamping arm in clamping position;

Figure 2 shows in section the device according to Figure 1 with the clamping arm in the open position;

FIG. 3 shows a section through the tensioning device with an alternative drive;

Figure 4 shows in perspective an embodiment of an extruded hollow profile and

FIG. 5 shows the extruded hollow profile according to FIG. 4 with an attached head piece. DESCRIPTION OF THE PREFERRED EMBODIMENTS

The clamping device to be described below consists in a known manner of a head piece 1 with a built-in adjusting mechanism 3 for a pivotally mounted on the head piece 1 clamping arm 6. This clamping arm 6 sits in the embodiment on both sides of the headpiece outstanding square pin 22 and is in clamping and opening position ( see FIGS. 1 and 2) by corresponding rotation of the square pins 22. The head piece 1 with its adjusting mechanism 3 and the clamping arm 6 is arranged on a housing 7. The interior 9 of the housing 7 serves to receive a linearly adjustable adjusting rod 13 connected on the one hand with the adjusting mechanism 3 and on the other hand with a drive 12 arranged in the housing 7.

All of these parts which can be joined together to form a tensioning device are firmly connected to one another by suitable and corresponding connection elements which, of course, are not particularly illustrated in the figures. This also applies to any VerschraubungsÖffnungen on the housing 7, with which the clamping device is to be attached to a support or holder, not shown here.

With reference to FIGS. 1 to 5, according to the present invention, it is essential that the housing 7 is designed in the form of an extruded hollow profile 8, the interior 9 of which has a constant internal cross-section Q over its entire length L. This housing 7 in the form of an extruded hollow section 8 forms a kind of a basic component for the construction of the entire clamping device.

As is illustrated by way of example as an exemplary embodiment in FIG. 4, the extruded hollow profile 8 preferably has a rectangular outer cross section, although the illustrated, concrete embodiment is not mandatory, ie, the extruded hollow profile 8 could also have, for example, a quadratic profile. have a cylindrical or circular cross-section. The inner cross-section Q can optionally be circular or elliptical (see FIG. 4), but also rectangular. For simplicity, a circular inner cross section in Figure 4 is indicated by dashed lines. The extruded hollow profile 8 according to the invention can also be provided on its outer surface, ie, in particular on its flank surfaces F with connecting elements, preferably in the form of grooves 21, which can be formed during extrusion with. As far as this is a transverse groove 26, as shown in Figures 1 to 5, this transverse groove 26 must be subsequently cut on the extruded hollow section 8.

The relative to the total length L of the extruded hollow section 8 relatively short or small head piece 1, which contains only the adjusting mechanism 3, as shown in Figures 1 to 3 and 5, in the form of a cap formed with its at least partially open side is arranged on the head end open side of the extruded profile 8 and firmly connected in a suitable manner with the extruded hollow section 8. With reference to FIG. 2, the at least partially open side of the cap ensures that a drag member 5 belonging to the actuating mechanism 3 can emerge from the short head piece 1 and engage in the extruded profile 8. The body of the extruded hollow section 8 or the actual housing 7 of the tensioning device thus remains advantageously unaffected by the placement of the actuating mechanism 3 composed of the lever arm 4, an actuating shaft, not shown, with its protruding square pins 22 and the drag member 5. Moreover, for the sake of an expedient installation of the actuating mechanism, the head piece 1 is formed from two cup-shaped and with suitable means against each other firmly joined together head piece parts 2, as illustrated in Figure 5.

If a Endstellungsabfrage the tensioning arm 6 is required for such tensioning devices, which is the case in the rule, is for the attachment of a suitable sensor 19, the Extruded hollow section 8 head side provided with a simple cut or auszufräsenden lateral opening 18 for receiving such a sensor 19, wherein such a slot-like opening 18 is preferably disposed in the region of one of the grooves 21. In order to be able to actually effect a position inquiry, the control rod 13 is provided with a position transmitter 20, which therefore participates in the up and down movement. From the usually provided installation of such a sensor 19 so the head piece 1 advantageously remains completely untouched, ie, such installation is limited solely to the extruded hollow section. 8

Since the housing 7 is formed by an arbitrarily long, cut to size extruded hollow section 8 and this is completed at one end of the head piece 1, and the head end remote end of the extruded hollow section 8 is to be provided with a suitable closure, d. H. , This can be done with a correspondingly adapted cover member 17, as shown in Figures 1 and 2.

Since, as can be seen from FIGS. 1 to 3, the extruded hollow profile 8 essentially and preferably corresponds to at least twice the length of the required travel S, which is correspondingly implemented by the actuating mechanism 3 for the pivotal movement of the clamping arm 6 from the open position (FIG. Figure 2) in the clamping position (Figure 1) and vice versa is necessary, there is a clear outline of the interior 9 in the housing 7 and in the extruded hollow section 8, which, since the interior 9 is continuously free of any installations or cross-sectional constrictions, the possibility of Freedom of choice for the drive 12 of the control rod 13 is opened, that is, the usually arranged in the lower part or in the head portion facing away from the head portion 9 of the extruded hollow section 8 drive 12 may advantageously be formed either as a pneumatic, hydraulic or electric drive. Incidentally, it should be pointed out at this point that the illustrated actuating mechanism 3 is to be understood as an example only, since other actuating mechanisms (eg. so-called curve drive - see DE 10 2004 007 465 Al) can be used.

When using a hydraulic or pneumatic drive is in the interior 9 of the extruded hollow section 8 for limiting a displacement 10 for a connected to the control rod 13 piston 14 sealed by the control rod 13 accessed by partition wall 15 is arranged sealed, in which case with reference to the figures. 1 and 2 the lower opening of the extruded profile 8 by the already mentioned closure cover (cover member 17) is to be closed in order to close the capacity 10 also down tight.

Since the inserted into the Stranpresshohlprofil 8 intermediate wall 15 must be fixed and sealed, the intermediate wall 15 is provided with a ring seal 23 and is fixed on one or both sides by means of only indicated holding elements 24.

The feeds for a suitable fluid operating means are indicated in dashed lines in Figures 1 and 2 and denoted there by 27 and require no particular explanation in this respect.

When using an electric drive according to FIG. 3, a rotary shaft of the electric drive, which is preferably embodied as a reversing motor 16, is operatively connected to the actuating rod 13 with the intermediary of a converter 25 for rotational movement, which is only indicated by dashed lines in FIG. Such reversing motors 16, which can rotate in two directions, and converter 25 are well known and require no particular explanation in this respect.

Although the use of such an electric drive, the extruded hollow section 8 can be closed below by a cover member 17, but it is also an embodiment to the effect that the electric drive or the reversing motor 16 with its outer housing, not shown itself forms a headpiece remote closure of the extruded hollow section 8.

LIST OF REFERENCE NUMBERS

1 head piece

2 head piece parts

3 actuating mechanism

4 lever arm

5 drag link

6 clamping arm

7 housing

8 extruded hollow profile

9 interior

10 cubic capacity

11 free space

12 drive

13 control rod

14 pistons

15 intermediate wall

16 reversible motor

17 cover element

18 opening

19 sensors

20 position transmitter

21 grooves

22 square spigots

23 ring seal

24 holding elements

25 converters

26 transverse groove

27 feeder

Q inside cross section

L total length

S travel

F flank surfaces

Claims

claims

1. clamping device, comprising a head piece (1) with an actuating mechanism (3) for a head piece (1) pivotally in clamping and open position engageable clamping arm (6) and a head piece (1) supporting housing (7) having an interior ( 9) for receiving a, on the one hand with the adjusting mechanism (3) and on the other hand with a in the housing (7) arranged drive (12) connected, linearly adjustable control rod (13) characterized eichnet that the housing (7) in the form of an extrusion hollow profile Fils (8) is formed, wherein the inner space (9) over its entire length (L) has a constant inner cross-section (Q).

2. Clamping device according to claim 1 characterized eggnet chnet that the extruded hollow profile (8) has a rechteckförmi- gene outer cross-section.

3. Clamping device according to claim 1 or 2, characterized gekennz egg chnet, that the .Innenquerschnitt (Q) is optionally formed circular or oval.

4. Clamping device according to one of claims 1 to 3, characterized gekennz egg chnet, that the extruded hollow profile (8) on its outer surface connecting elements, preferably in the form of grooves (21, 26).

5. Clamping device according to one of claims 1 to 4, since you rchgeke nn zeic hn et that the adjusting mechanism (3) containing head piece (1) is in the form of a cap.

6. Clamping device according to one of claims 1 to 5, characterized gekennz egg chnet, that the head piece (1) is arranged with its at least partially open side on the head end open side of the extruded profile (8).

7. Clamping device according to one of claims 1 to 6, characterized in that the head piece (1) consists of two shell-shaped head piece parts (2) is formed.

8. Clamping device according to one of claims 1 to 7, a c h e c e e c e s e s that the extruded hollow profile (8) has a lateral opening (18) for receiving a sensor system (19) for final position query.

9. Clamping device according to one of claims 1 to 8, characterized gekennz egg chnet, that the adjusting rod (13) is provided with a position sensor (20).

10. Clamping device according to one of claims 1 to 9, as can be c h e c henn e e c hn e e that the head end remote from the hollow extruded profile (8) with a cover element (17) is closed.

11. Clamping device according to one of claims 1 to 10, since you rchg ek enn zeic hn et, that in the lower part of the interior (9) of the extruded hollow profile (8) arranged drive (12) optionally designed as a pneumatic, hydraulic or electric drive is.

12. Clamping device according to claim 11 when using a hydraulic or pneumatic drive, characterized gekennz eichnet that in the interior (9) of the extruded hollow profile (8) for limiting a displacement (10) for one with the control rod (13) connected to the piston (14) by the adjusting rod (13) sealed penetrated intermediate wall

(15) is arranged sealed.

13. Clamping device according to claim 11 when using an electric drive, characterized gekennzei chnet that a rotary shaft of the preferably reversible motor

(16) trained electric drive with the interposition of a converter (25) for a rotary movement in a linear movement with the actuating rod (13) is operatively connected.

14. Clamping device according to claim 13, dadur ch gekenn z ei chne t that the electric drive forms with its housing a headpiece remote closure of the extruded hollow profi (8).

15. Clamping device according to one of claims 1 to 14, d adurch characterized in that the extruded hollow profile (8) in its overall length (L) substantially equal to at least twice the length of the required travel (S), which in turn via adjusting mechanism (3) for the Pivoting movement of the clamping arm (6) from the open position into the clamping position is necessary.