EP3100827A1 - Press lever assembly with a press lever and press jaws - Google Patents

Abstract

A pressing lever arrangement (1) comprises a pressing lever (2) and a pressing jaw (3), wherein the pressing lever (2) has a pressing jaw receptacle (4) with a receiving surface (5) and wherein the pressing jaw (3) extends around a central axis (M). having partially around extending pressing surface (6) with a pressing contour (7) and a receiving surface (8), wherein the pressing jaw (3) with its receiving surface (8) in the pressing jaw receptacle (4) of the pressing lever (2) can be positioned. Furthermore, the pressing lever arrangement (1) comprises at least one securing element (9, 10, 11) which is arranged or designed such that a relative displacement between the pressing jaw (3) and the pressing jaw receptacle (4) can be prevented.

Description

TECHNICAL AREA

The present invention relates to a press lever arrangement with a press lever and a press jaw according to the preamble of claim 1 and a press tool with two press lever arrangements according to claim 15.

STATE OF THE ART

From the prior art pressing tools for pressing of pressing elements, in particular of press fittings, pipes and sleeves have become known.

The DE 20 2011 101 995 shows a pressing tool with two pressing levers made of fiber composite material, wherein a pressing jaw is inserted during curing in the respective pressing lever. The pressing jaw is in a firm bond with the pressing levers.

A disadvantage of the pressing tool DE 20 2011 101 995 is the connection between the press lever and the press jaw, which can be impaired during the pressing process.

PRESENTATION OF THE INVENTION

Starting from this prior art, it is an object of the present invention to provide a press lever which overcomes the disadvantages of the prior art. In particular, the same quality of compression is to be achieved over several pressings.

This object is achieved by the press lever according to claim 1. Accordingly, a press lever arrangement comprises a press lever and a press jaw. The pressing lever has a pressing jaw receptacle with a receiving surface. The pressing jaw has a pressing surface with a pressing contour and a receiving surface that extends partially around a central axis. The pressing jaw can be positioned with its receiving surface in the pressing jaw receiving the pressing lever. Press lever and press jaw are thus on the respective recording with each other. Furthermore, the pressing lever arrangement comprises at least one securing element, which is arranged or designed in such a way that a relative displacement between pressing jaw and pressing jaw receiving can be prevented. It is also conceivable to arrange two or at least two securing elements.

By the securing element so the pressing jaw is held in the pressing jaw recording. Due to this fixed positioning, the quality of the individual pressings can be maintained with each other.

The pressing jaw and the pressing lever are two separate elements, which are assembled and secured to each other via the securing element.

Preferably, the at least one securing element is designed as a separate element to the pressing lever and the pressing jaw. The at least one securing element can be connected to the pressing lever and / or the pressing jaw, so that a Relatiwerschiebung between pressing jaw and pressing jaw recording can be prevented. Alternatively or additionally, the at least one securing element can also be part of the pressing lever and / or the pressing jaw.

Preferably, the at least one securing element is arranged such that a displacement of the pressing jaw relative to the pressing jaw receiving along the central axis and a displacement about the central axis can be prevented. The pressing jaw is thus fixed in position in the pressing jaw holder.

Preferably, the receiving surface of the pressing jaw receiving and Receiving surface of the pressing jaw the shape of a partially extending around the central axis around cylinder, in particular a half-cylinder, on. Also conceivable are elliptical bearing surfaces or bearing surface of several sections, such as a hexagonal bearing surface.

Preferably, a substantially full-surface contact is made between the receiving surface of the pressing jaw receiving and the receiving surface of the pressing jaw. This means that the reception area is essentially congruent.

The receiving surfaces are depending on the design of the fuse element in direct or indirect contact with each other.

In a first preferred embodiment, the at least one securing element is at least one securing pin which is inserted into a bore extending partly through the pressing jaw and partly through the pressing lever. More preferably, more than one locking pin can be used. In particular, two locking pins are preferably used at a distance from one another. For this purpose, two spaced holes are provided.

Preferably, the bore or the lateral surface of the securing pin penetrates in sections the two receiving surfaces.

Preferably, the center axis of the bore or the center axis of the securing pin penetrates in sections the two receiving surface.

The said penetration of the bore or of the central axis is such that the pressing contour is preferably not cut or remains unaffected by it.

Preferably, the at least one locking pin extends transversely and spaced from the central axis of the pressing surface. Alternatively, the at least one locking pin extends parallel and spaced from the central axis. A combined arrangement transversely and parallel to the central axis is also conceivable in the presence of multiple locking pins. Also, the locking pin could be angled inclined to the central axis.

In a second embodiment, the at least one securing element is a protrusion extending from one of the receiving surfaces, which engages with a recess extending into the other receiving surface. There may be several elevations and several wells. The survey engages in each case in the depression.

The elevation preferably extends away from the receiving surface of the pressing jaw receiving means and the depression extends into the receiving face of the pressing jaw, with the elevation or recess preferably being arranged in the end regions of said receiving face.

Preferably, the elevation or the recess is formed circumferentially in the direction of the central axis and / or about the central axis.

The at least one elevation or the recess is preferably arranged in the corresponding edge regions of the receiving surface and thus forms a stop against a relative movement between pressing jaw receiving and pressing jaw.

In a third embodiment, the at least one securing element is formed by the securing element according to the first embodiment and that according to the second embodiment. It is therefore a combined arrangement of the locking pin and the survey. Particularly preferably, the locking pin is oriented transversely to the said central axis and the elevation is oriented parallel to said central axis.

In a fourth embodiment, the securing element is a cohesive connection between the pressing jaw receiving and the pressing jaw, wherein the cohesive connection is in particular a soldered connection and / or in particular a welded connection and / or in particular an adhesive connection.

In a further embodiment, the securing element is provided by the securing pin, the elevation and the integral connection. In another Embodiment, the securing element is provided by the survey and the material connection.

In a further embodiment, the securing element is provided by a non-positive connection between pressing jaw and pressing jaw receiving, wherein the securing element is provided in particular by inserting the pressing jaws by means of a heat sinking method.

This embodiment can also be arbitrarily combined with another embodiment mentioned above. Particularly preferred is the combination of locking pin, elevation and insertion with the heat sinking method. The combination of heat sinking and mechanical fixation is particularly advantageous with regard to holding the pressing jaws in the pressing jaw receiving means.

Preferably, the material of the pressing lever is tempered steel and the material of the pressing jaw is case hardening steel. By this choice of material, a particularly wear-resistant press lever arrangement can be provided. Furthermore, the optimum material can be used for each part of the pressing lever arrangement.

In all embodiments, the receiving surface of the pressing jaw receptacle is preferably substantially congruent to the receiving surface of the pressing jaw.

Preferably, the pressing jaw is designed as a removable insert. This means that pressing jaws can be exchanged in the event of a defect and / or that pressing jaws with different pressing contours can be inserted into the same pressing lever. The receiving surface and the other features relating to the interface between the pressing jaw and the pressing lever are identical under the various pressing jaws. Preferably, however, the securing element is designed so that it is interchangeable only in case of maintenance and not in daily use.

Furthermore, the receiving surfaces preferably extend cylindrically around the said central axis of the pressing contour. In particular, the receiving surface extends circularly around the central axis of the pressing contour.

A press tool comprises two press lever arrangements as described above, wherein the one press lever about a first pivot axis and the other press lever are pivotable about a second pivot axis from a starting position into a pressing position.

Preferably, the two pressing levers are preferably mounted pivotably on their respective pivot axis on at least one common support structure.

Further embodiments are given in the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1

eine perspektivische Ansicht eines Presswerkzeuges mit zwei erfindungsgemässen Presshebelanordnungen;

Fig. 2

eine perspektivische Explosionsdarstellung einer Presshebelanordnung nach Figur 1;

Fig. 3

eine Schnittdarstellung der Presshebelanordnung nach einer der vorhergehenden Figuren;

Fig. 4

eine Detailansicht des Details IV von Figur 3; und

Fig. 5

die Schnittdarstellung nach Figur 3 mit entfernter Pressbacke.

Preferred embodiments of the invention will be described below with reference to the drawings, which are given by way of illustration only and are not to be interpreted as limiting. In the drawings show:

Fig. 1

a perspective view of a pressing tool with two inventive lever arrangements;

Fig. 2

an exploded perspective view of a pressing lever assembly according to FIG. 1 ;

Fig. 3

a sectional view of the pressing lever assembly according to one of the preceding figures;

Fig. 4

a detailed view of the detail IV of FIG. 3 ; and

Fig. 5

the sectional view to FIG. 3 with removed pressing jaw.

DESCRIPTION OF PREFERRED EMBODIMENTS

In the FIGS. 1 to 5 A preferred embodiment of the inventive pressure lever assembly 1 is shown.

In the FIG. 1 the press lever assembly 1 is shown in combination with a press tool. The pressing tool here comprises two pressing lever arrangements 1 as described below. The one lever is about a first pivot axis A1 and the other press lever is pivotable about a second pivot axis A2 from a starting position into a pressing position. The two press levers are here via two spaced-apart support elements 13 in conjunction. The pressing levers are pivotable relative to the support elements 13.

The press lever assembly 1, as in the FIGS. 1 and 2 shown, comprises a pressing lever 2 and a pressing jaw 3. The pressing lever 2 has a pressing jaw receiving 4 with a receiving surface 5. In this Pressbackenaufnahme 4, the pressing jaw 3 can be used. The pressing jaw 3 in turn comprises a pressing surface 6 extending around a central axis M and having a pressing contour 7 and a receiving surface 8. The pressing jaw 3 can be positioned with its receiving surface 8 in the pressing jaw receptacle 4 of the pressing lever 2. The receiving surface 8 of the pressing jaw 4 is in contact with the receiving surface 5 of the pressing jaw receiving 4 of the pressing lever 2. The pressing contour 7 lies opposite the receiving surface 8 and is substantially concave, so that a part to be pressed, such as a fitting to be pressed by the pressing contour 7 is compressible.

Further, the pressing lever assembly 1 comprises at least one securing element 9, which is arranged or designed such that a relative displacement between the pressing jaw 3 and pressing jaw receiving 4 can be prevented. With the securing element 9 so the pressing jaw 3 is kept fixed in position in the pressing jaw receiving 4 of the pressing lever 2.

Preferably, the securing element 9 is formed such that the pressing jaw 3 is exchangeable, that is, the pressing jaw 3 can be removed from the pressing jaw receiving 4 and replaced by a different pressing jaw 3. Preferably, however, the securing element 9 is designed so that it is interchangeable only in case of maintenance and not in daily use.

The at least one securing element 9 is arranged such that a displacement between the pressing jaw 3 and pressing jaw receptacle 4 along the center axis M and about the central axis M can be prevented. That is, the securing element 9 ensures that the pressing jaw 4 is mounted immovably in the pressing jaw holder 4.

Of the FIG. 2 can be well recognized that the receiving surface 5 of the pressing jaw receiving 4 and the receiving surface 8 of the pressing jaw 3 has the shape of a partially extending around the central axis M around cylinder. Preferably, the cylinder has the cross section of a part of a circular cylinder, that is, the cylinder has a constant radius.

The receiving surface 5 of the pressing jaw receiving 4 and the receiving surface 8 of the pressing jaw 3 are congruent or congruent to each other. Particularly preferably, the two receiving surfaces 5, 8 in surface contact with each other.

In the present embodiment, the at least one securing element 9 is provided by a securing pin 9, a protrusion 10 in cooperation with a recess 11 and the application of an optional heat sinking method when inserting the pressing jaw 3 into the pressing jaw receptacle 4. The use of other security elements in combination with said or in isolation or in any other combination is also conceivable.

As a result, now the individual mentioned securing elements 9, 10, 11, which are shown in the figures, explained in more detail.

The locking pin 9 is inserted in a partially extending through the pressing jaw 3 and partially through the pressing lever 2 bore 12. The bore 12 is designed such that it extends in sections through the two receiving surfaces 5, 8 therethrough. The bore 12 penetrates or intersects the two receiving surfaces 5, 8. The same can be said with respect to the lateral surface 14 of the securing pin 9. The lateral surface 14 of the securing pin 9 penetrates the two receiving surfaces 5, 8 in sections. Consequently, the securing pin 9 provides a stop with respect to a movement about the central axis M and along the center axis M between the pressing jaw 3 and the pressing jaw holder 4.

In the embodiment shown, two locking pins 9 and two holes 12, in which the locking pins 9 are used, available. The holes 12 are spaced from each other, whereby the locking pins 9 spaced from each other come to rest. The locking pins 9 are here transversely and spaced from the central axis M of the pressing surface 6 placed. Alternatively, the at least one locking pin 9 can also run parallel to and spaced from the central axis M.

In the FIG. 3 the sectional view is shown with inserted locking pin 9 and in FIG. 5 shown with removed locking pin 9. From these two figures can also be seen that not only the bore 12 and the lateral surface 14 of the locking pin 9, the two receiving surfaces 5, 8 penetrates, but that the central axis M9 of the locking pin 9, the two receiving surfaces 5, 8 penetrates. As a result, the locking pin 9 penetrates equally well into the pressing jaw 3 and the pressing jaw receiving 4, so that the connection between the two elements can be further improved.

Of the Figures 2 and 4 the elevation 10 and the recess 11 can be well recognized. In the illustrated embodiment, a survey 10 extends at the respective ends of the receiving surface 5 of the receiving surface 5 of the pressing jaw receiving 4 away. The elevation 10 extends essentially in the direction of the said central axis M. Equally, the depression 11 extends from the receiving surface 8 of the pressing jaw 3 into the receiving surface 8. The recess 11 is arranged in the present case at the end of the respective receiving surface 8 and forms in other words a kind of extension of the receiving surface 8. The cooperation between the elevation 10 and recess 11 an additional securing element is provided. The elevation 10 and recess 11 essentially ensures that the pressing jaw 3 can not fall out of the pressing jaw receptacle 4 in the transverse direction to the center axis M.

The mating elevation 10 / recess 11 is preferably arranged on the edge regions of the receiving surfaces 5, 8, so that the force on the receiving surface during the pressing process is not affected.

For smaller compression forces a mating elevation 10 / recess 11 could also be arranged within the corresponding receiving surfaces. In alternative Embodiments, the mating elevation 10 / recess 11 could also extend circumferentially along the respective receiving surface 5, 8.

As explained above, the securing element is additionally provided by inserting the pressing jaw into the pressing jaw receiving means 4 by means of a heat sinking method. For this purpose, a temperature difference between the pressing jaw 3 and the pressing jaw receptacle 4 is produced, such that the pressing jaw receptacle 4 can expand with respect to the pressing jaw 3. This is achieved, for example, by cooling the pressing jaw 3 or heating the pressing jaw holder 4. As a result, a small clearance between the pressing jaw 3 and the pressing jaw receptacle 4 can be created, which allows the insertion of the pressing jaw 3 into the pressing jaw receptacle 4. When the normal temperature is reached, the pressing jaw 4 then sits fully in the pressing jaw receptacle 4.

The material of the pressing lever 2, in which the pressing jaw receptacle 4 is arranged, is preferably a tempered steel with a tough breaking behavior. For example, the tempered steel could be 42CrMo4. The material of the pressing jaw 3 is preferably case hardening steel or ceramic against wear. The case steel could be, for example, 18CrNiMo7-6. As a result, an optimal material pairing with respect to the various requirements can be achieved.

Of the FIGS. 2 to 5 can be further recognized that the two pivot axes A1 and A2 are provided by a bore 12. Below the bore, ie opposite the pressing jaw holder 4, the pressing lever 2 has a contact contour 15, via which a tool can act on the pressing lever 2.

LIST OF REFERENCE NUMBERS

1

Press lever assembly

2

press lever

3

pressing jaw

4

Jaw head

5

receiving surface

6

Press area

7

pressing contour

8th

receiving surface

9

Securing element, pin

10

Safety element, survey

11

Securing element, recess

12

drilling

13

Support elements

14

lateral surface

15

Contact outline

A1

swivel axis

A2

swivel axis

M

central axis

M9

Center axis pin

Claims (15)

Press lever assembly (1) comprising a pressing lever (2) and a pressing jaw (3), wherein the pressing lever (2) has a pressing jaw receptacle (4) with a receiving surface (5) and
wherein the pressing jaw (3) has a pressing surface (6) with a pressing contour (7) and a receiving surface (8) extending around a central axis (M), the pressing jaw (3) having its receiving surface (8) in the pressing jaw receiving means (8). 4) of the pressing lever (2) is positionable,
characterized,
in that the pressing lever arrangement (1) further comprises at least one securing element (9, 10, 11) which is arranged or designed such that a relative displacement between the pressing jaw (3) and the pressing jaw receptacle (4) can be prevented. Press lever arrangement (1) according to claim 1, characterized in that the at least one securing element (9; 10, 11) is arranged such that a displacement of the pressing jaw (3) relative to the pressing jaw receptacle (4) along the central axis (M) and a displacement around the central axis (M) can be prevented. Press lever arrangement (1) according to claim 1 or 2, characterized in that the receiving surface (5) of the pressing jaw receptacle (4) and the receiving surface (8) of the pressing jaw (3) take the form of a cylinder extending partially around the central axis (M), in particular a half cylinder. Press lever arrangement (1) according to one of the preceding claims, characterized in that the at least one securing element (9) is a securing pin (9), which extends into a bore (3) partially passing through the pressing jaw (3) and partially through the pressing lever (2). 12) is used. Press lever arrangement (1) according to claim 4, characterized in that the Bore (12) or the lateral surface (14) of the locking pin (9) in sections, the two receiving surfaces (5, 8) penetrates. Press lever assembly (1) according to claim 4 or 5, characterized in that the central axis (M9) of the bore (13) or the central axis (M9) of the securing pin (9) in sections penetrates the two receiving surface (5, 8). Press lever arrangement (1) according to one of the preceding claims 4 to 6, characterized in that the at least one securing pin (9) transversely and spaced from the central axis (M) of the pressing surface (6); and / or that the at least one securing pin (9) extends parallel to and spaced from the central axis (M). Press lever arrangement (1) according to one of the preceding claims, characterized in that the at least one securing element (10, 11) is a projection (10) extending away from one of the receiving surfaces, which protrusion (11) extends into the other receiving surface. intervenes. Press lever arrangement (1) according to claim 8, characterized in that the elevation (10) extends away from the receiving surface (5) of the pressing jaw receptacle (4) and that the depression (11) extends into the receiving surface (8) of the pressing jaw (3). extends in elevation (10) or recess (11) preferably in the end regions (13) of said receiving surface (5) are arranged. Press lever arrangement (1) according to one of claims 8 or 9, characterized in that the elevation (10) or the recess (11) in the direction of the central axis (M) and / or around the central axis (M) is formed circumferentially. Press lever arrangement (1) according to one of the preceding claims, characterized in that the securing element is a material connection between the pressing jaw receiving and the pressing jaw, wherein the cohesive connection is in particular a soldered connection and / or in particular a welded connection and / or in particular an adhesive connection. Press lever arrangement (1) according to one of the preceding claims, characterized in that the securing element is provided by a frictional connection between the pressing jaw (3) and pressing jaw receiving means (4), wherein in particular by inserting the pressing jaw (3) in the pressing jaw receiving means (4) a heat sinking method is provided. Press lever assembly (1) according to any one of the preceding claims, characterized in that the material of the pressing lever is tempering steel and that the material of the pressing jaw case-hardening steel or ceramic. Press lever arrangement (1) according to one of the preceding claims, characterized in that the receiving surface (5) of the pressing jaw receptacle (4) is substantially congruent to the receiving surface (8) of the pressing jaw (3) and / or that the receiving surfaces (5, 8) cylindrical, in particular circular-cylindrical, around the said central axis (M) of the pressing contour (7) extends around. Pressing tool comprising two press lever arrangements (1) according to one of the preceding claims, wherein the one press lever about a first pivot axis (A1) and the other press lever about a second pivot axis (A2) are pivotable from a starting position into a pressing position.

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