PRESS DEVICE

Description

[0001] The present disclosure relates to a pressing apparatus in the form of a set comprising a drive device and a plurality of different pressing tools that can be alternatively connected thereto. Furthermore, the present disclosure relates to a pressing machine as an assembly of the drive device with a connected pressing tool. Document EP 3 639 942 A1 discloses a set according to the preamble of claim 1.

[0002] Pressing machines are primarily used in plumbing and heating installations and are used, for example, for radially pressing pipe connections. Pressing machines typically consist of a pressing tool and a connected drive unit, which actuates the pressing tool to perform a pressing process. The drive unit typically has a connection for the pressing tool at one end, and a gripping surface behind it allows the press to be held in the hand during pressing.

[0003] Pressing machines are often offered in sets, i.e., a combination of several different pressing tools. Typical sets include a press machine combined with several pressing tongs of different jaw widths. Sometimes the sets include additional tools or accessories useful for the specific application. This allows the press machine to be used for a wide range of different pipe diameters by equipping the drive unit with the appropriate pressing tool for each application. Examples of such sets can be found in the 2012 / 2013 product catalog of Rothenberger Werkzeuge GmbH, pages 100 to 103.

[0004] Due to the weight of the pressing tool, the pressing machines are often undesirably top-heavy when held by the handle. This can sometimes make working with the pressing machine difficult.

[0005] Thus, there is a need to reduce the top-heaviness of the pressing machine to a desired level or even to avoid it altogether, at least for individual pressing tools of a set of the type mentioned above.

[0006] The problem is solved in principle with a set having the features of claim 1. To solve the problem, a press machine having the features of claim 13 is further proposed. Advantageous embodiments and / or refinements and / or aspects of the basic solution emerge from the subclaims, the following description, and the figures.

[0007] According to one aspect, a set with or consisting of a drive device and at least two pressing tools that can be alternatively connected to it is proposed. For example, the pressing tools are different from one another. For example, the pressing tools have different jaw widths. For example, the pressing tools are designed for the radial pressing of pipes or pipe connections. For example, the pressing tools are designed to press pipes or pipelines in plumbing and heating installations. A pressing machine is formed, for example, if one of the alternatively connectable pressing tools from the set is connected to the drive device.

[0008] The drive device can be a handheld device. Such a drive device preferably has a gripping surface, for example, for being hand-guided and / or hand-held. This allows the press machine to be used by a user holding it in the hand and / or guiding it by hand. For example, the gripping surface is formed on a handle. For example, the gripping surface is formed on a housing of the drive device.

[0009] The drive device comprises, in particular, a connecting part for connecting one of the pressing tools. In particular, the connecting part is arranged adjacent to the gripping surface or at a distance from the gripping surface. The drive device further comprises, in particular, a roller tappet for actuating the connected pressing tools. For example, the drive device is an electrohydraulic or electromotor drive device. In this case, the roller tappet is driven electrohydraulically or by an electric motor. In principle, the drive device can also be a manual drive device. In this case, the connected pressing tool is operated manually.

[0010] In particular, the connecting part is arranged at the front of the drive device. In particular, the connecting part has a plug-in receptacle. In particular, the plug-in receptacle is arranged upstream of the gripping surface, as viewed in the insertion direction. In particular, a pressing tool to be connected, in particular one of the pressing tools of the set, can be inserted into the plug-in receptacle. In particular, the pressing tool to be connected can be inserted into the plug-in receptacle from the front of the drive device. In particular, the connecting part further has a coupling point in order to force-couple the connecting part to the pressing tool inserted into the plug-in receptacle. For example, the pressing tools all use the same coupling point.

[0011] In one embodiment, at least two depth stops are provided on the connecting part at different depths of the plug-in receptacle. Furthermore, the pressing tools are each designed for one of the depth stops, in particular each designed for only one of the depth stops. For example, the pressing tools each have a counter-stop for the respective associated depth stop, for example, to come into contact with the associated depth stop upon insertion into the plug-in receptacle.

[0012] As a result, one of the pressing tools is inserted deeper into the socket than the other, and is therefore closer to the gripping surface when the corresponding depth stop is reached. The proposed measure makes it possible, at least for some of the pressing tools, to shift the center of gravity of the pressing machine towards the gripping surface, thus reducing, if not completely eliminating, the top-heaviness of the pressing machine. Furthermore, it is possible to individually determine the center of gravity of the pressing machine for each connectable pressing tool. To do this, simply position the corresponding depth stop at a corresponding depth in the socket.

[0013] In this description, the term "pressing tool" refers to any type of press head that can be connected to the drive device and is directly suitable for pressing pipe connections or for transmitting force to tools for this purpose. This includes, in particular, pressing tongs, adapter tongs for pressing rings, and so-called pulling jaws for pressing slings.

[0014] In this description, the term "depth stop" refers in particular to a stop that limits the insertion depth of the pressing tool in the plug-in receptacle. For this purpose, the depth stop is arranged at a depth within the plug-in receptacle. The depth generally also includes a value of zero or essentially zero. For example, the depth stop may be formed by the edge of the insertion opening of the plug-in receptacle, i.e., by the edge of the opening of the plug-in receptacle.

[0015] Each pressing tool is provided with a counter-coupling point that can be operatively connected to the coupling point, for example, at a distance from the provided counter-stop. A bolt receptacle for a retaining bolt is formed at the coupling point and the counter-coupling point, for example, in order to achieve the force coupling of the pressing tool inserted into the plug-in receptacle with the connecting part. For example, the bolt receptacle is designed as a bore or has a bore, for example, for inserting or passing the retaining bolt through it. For example, the pressing tools all use the same retaining bolt to be fixed or secured to the connecting part.

[0016] According to one embodiment of the drive device, the depth stops are each arranged at a distance from the coupling point, in particular at a predetermined distance which corresponds to the distance between the counter-stop and the counter-coupling point of the respective associated pressing tool. This facilitates easy connection of the respective pressing tool to the drive device. This is achieved by the coupling point and the counter-coupling point being in a coupling position with respect to one another when the pressing tool to be connected comes into contact with the associated depth stop, i.e. when the pressing tool is in the inserted state. In principle, the distance between the coupling point and one of the depth stops can have a zero value. Accordingly, the distance between the counter-stop and the counter-coupling point of the associated pressing tool can have a zero value.

[0017] If a retaining bolt is used to force-couple the pressing tool and the connecting part, and a bolt receptacle is provided at the coupling point and the counter-coupling point, the pressing tool to be connected is in such an inserted position in the plug-in receptacle when the aforementioned depth stop is reached that the retaining bolt can be inserted directly into the bolt receptacle. If the bolt receptacle is a bore, for example, the bores at the coupling point and the counter-coupling point are aligned with each other, so that the retaining bolt can be inserted, for example, without further change in the position of the pressing tool relative to the connecting part.

[0018] A further embodiment consists in the connecting part comprising two legs that enclose a gap between them, defined by preferably plane-parallel walls. The gap can be configured so that lever arms of the connected pressing tool can be pivoted into it. The gap can form a cavity or be connected to a cavity into which the roller tappet can be inserted to actuate the connected pressing tool.

[0019] In particular, the gap is used to form the plug-in receptacle. In particular, the depth stops are arranged on at least one of the legs. For example, the depth stops are formed by contact surfaces arranged transversely, in particular orthogonally, to the plane-parallel walls. This facilitates the simple implementation of the depth stops, since existing structural elements of the connecting part can be used to form the depth stops.

[0020] In a further embodiment, a wall section of at least one of the plane-parallel walls is assigned to at least one of the depth stops, wherein the wall section adapts the width of the plug-in receptacle, at least via an insertion section, to the thickness of the pressing tool associated with the associated depth stop. This makes it possible for the associated pressing tool to be guided against the associated depth stop upon insertion into the plug-in receptacle. This measure aims to ensure that the pressing tool to be connected comes against the correct depth stop, i.e., the associated depth stop, upon insertion into the plug-in receptacle.

[0021] The measure whereby a wall section of at least one of the plane-parallel walls is assigned to each depth stop also goes in this direction. In particular, the width of the plug-in receptacle is adapted to the thickness of the pressing tool associated with the respective depth stop via a plug-in section, i.e., a length extending into the depth of the plug-in receptacle, by means of the respective wall section. This enables the corresponding pressing tool to be guided against the associated depth stop when inserted into the plug-in receptacle.

[0022] In this case, it is advisable for the plug-in receptacle to taper in the insertion direction through the respective wall section, for example, by tapering it in stages. This allows the respective pressing tool to be inserted into the plug-in receptacle up to its respective depth stop via the same insertion opening.

[0023] In a further embodiment, the depth stops are provided in pairs on the at least one leg, and the depth stops of at least one pair are arranged on opposite longitudinal edge regions of the at least one leg. This promotes precise positioning of the pressing tool to be connected in the plug-in receptacle, since the pressing tool is brought into contact with the pair of associated depth stops. This counteracts lateral tilting of the pressing tool when brought into contact in the plug-in receptacle.

[0024] For example, the at least one leg is designed, at least in the region of its walls defining the plug-in receptacle, to be symmetrical with respect to a central plane extending transversely, in particular orthogonally, to the plane-parallel walls. This facilitates technically simple production of the pairs of depth stops.

[0025] For example, at least two additional depth stops are provided on the other leg, which are symmetrical with respect to the center plane. This also provides a measure to ensure precise positioning of the pressing tool to be connected in the plug-in receptacle. When inserted, the pressing tool to be connected in this case comes into contact with the corresponding depth stop of one leg and with the corresponding additional depth stop of the other leg. Simplification of production is facilitated if, according to a further embodiment, the two legs are mirror-symmetrical to each other, at least in the area of the plug-in receptacle.

[0026] Another embodiment involves positioning the counter-coupling point at a distance from the jaws of one-piece pressing tools, and particularly pressing tongs, such that as the jaw width of the tongs becomes smaller, the counter-coupling point is closer to the respective jaw. This provides a measure on the tong side to bring the center of gravity of the pressing machine as close as possible to the gripping surface.

[0027] A possible embodiment of at least one of the pressing tools to be connected is a pressing tong comprising two pressing jaws that can pivot relative to one another and are rotatably mounted on at least one connecting plate about a pivot axis. The pivot axes are preferably axially parallel to one another and extend transversely, in particular perpendicularly, to the surface side of the connecting plate. Furthermore, the counter-coupling point is preferably formed by a bore in the at least one connecting plate, and a surface section of the end face of the at least one connecting plate is configured to form the counter-stop. The surface section of the end face preferably extends transversely to the surface side of the connecting plate.

[0028] With this design of the pressing pliers, the surface section that can be used as a counter-stop can be positioned in front of the center axis of the bore, viewed from the bore to the jaws. This provides an additional measure on the pliers side to position the center of gravity of the pressing machine as close as possible to the gripping surface.

[0029] Furthermore, it can be provided that the pressing tools have different thicknesses in the direction of the pivot axes. This allows the pressing tools to be adapted to the width of the plug-in receptacle in the area corresponding to the depth stop associated with the respective pressing tool. The different thicknesses also adapt the pressing tools so that when inserted into the plug-in receptacle, the pressing tools can only come into contact with their respective depth stop.

[0030] In a further embodiment, the set comprises three pressing tools that can be alternatively connected to the drive device, for example, with different jaw widths. Preferably, two of the pressing tools are the pressing tongs described above. Furthermore, a third pressing tong is provided. Accordingly, a third depth stop is provided on the connecting part of the drive device. The third pressing tong preferably has a counter-stop for the third depth stop and a counter-coupling point for the coupling point of the connecting part.

[0031] In this embodiment, the third depth stop is formed, for example, by the opening edge of the plug-in receptacle with respect to the drive device. With respect to the third crimping pliers, the counter-stop is preferably arranged at a distance from the counter-coupling point that corresponds to the distance between the third depth stop and the coupling point on the connecting part.

[0032] According to a further aspect, a pressing machine is proposed, which comprises a drive device and one of the pressing tools from the set described above. The pressing tool is inserted into the plug-in receptacle of the connecting part against one of the depth stops and is fixed, in particular fastened, to the connecting part by a retaining bolt using the coupling point.

[0033] The proposed set features a proprietary connector for pressing tools on the drive unit. This connector is specifically designed for multiple pressing tools, which can be connected alternatively. The pressing tools included in the set are each designed for specific mounting on the connector.

[0034] Further concepts, principles, details, and features will become apparent from the following description of several embodiments with reference to the attached drawings, in which: Fig. 1 shows a possible embodiment of a pressing machine for the radial pressing of pipe connections in a perspective view, Fig. 2 shows the drive device of the pressing machine according to Figure 1 in an enlarged section in the area of a connecting part for connecting a pressing tool, Figs. 3, 4 and 5 show pressing tools with different mouth widths in a perspective view.

[0035] Figure 1 shows—in a schematic representation—a possible embodiment of a pressing machine 300, which is suitable, for example, for pressing pipes, pipe connections, or fittings and is used, for example, in heating or plumbing installations. The pressing machine 300 comprises a drive device 100 and a pressing tool connected thereto, for example a pressing tong 200', which can be actuated by the drive device 100.

[0036] The drive device 100 can be designed as an electrohydraulic or electromotor drive device 100 and accordingly comprise an electrohydraulic or electromotor drive. For example, the drive device 100 comprises a roller tappet 50, which is driven by the drive and exerts an actuating force on the pressing tongs 200'. For example, the roller tappet 50 has two preferably rotatably mounted rollers 51, 52, via which the actuating force is transmitted to the pressing tongs 200'. To actuate the exemplary pressing tongs 200', the roller tappet 50 is designed to perform a lifting movement in the direction indicated by arrow 53, which, for example, runs in the direction of the longitudinal axis L of the drive device 100.

[0037] The drive device 100 is preferably elongated, in particular rod-shaped. For example, a preferably removable or replaceable electrical energy storage device 13, in particular an accumulator, for supplying electrical energy to the drive is arranged in the region of a rear end of the drive device 100. This allows the pressing machine 300 to be operated independently of a mains power supply. The drive device 100 has a gripping surface 10, for example, to be held in the hand and / or guided by hand by a user during pressing. For example, the gripping surface 10 is formed by at least a portion of a housing 11, which is, for example, cylindrical and houses, for example, the electric motor or electrohydraulic drive.

[0038] Preferably, the drive device 100 further comprises a connecting part 30 to which the pressing tongs 200' are connected. As can be seen from the Figure 1As can be seen, the connecting part 30 is arranged at the front of the drive device 100 and has a receptacle, in particular a plug-in receptacle 31, which is arranged upstream of the gripping surface 10 as seen in the plug-in direction according to arrow E. The pressing tongs 200' are inserted into the plug-in receptacle 31 from the front of the drive device 100. The plug-in direction (arrow E) preferably runs in the direction of the longitudinal axis L of the drive device 100. The plug-in direction (arrow E) is preferably opposite to the direction of the lifting movement (arrow 53) of the roller tappet 50 when the pressing tongs 200' are actuated.

[0039] Preferably, the connecting part 30 has a coupling point 32 to force-couple the connecting part 30 with the pressing tongs inserted into the plug-in receptacle 31, i.e., the connected pressing tongs 200'. For example, the coupling point 32 has a bolt receptacle 32.1 into which a retaining bolt 60 is inserted, thereby force-coupling the connecting part 30 with the pressing tongs 200' located in the plug-in receptacle 31.

[0040] Figure 2 shows an example of the drive device 100 of the Figure 1 in the area of the connecting part 30. As can be seen in particular from this, the connecting part 30 has at least two depth stops 33, 34, which are provided at different depths of the plug-in receptacle 31. The depth stops 33, 34 are components of a proprietary connection in order to connect at least two (in the Figure 2The purpose of the press tool (not shown) is to alternatively connect pressing tools, for example, pressing tongs with different jaw widths, with the depth stops 33, 34 each being associated with one of the pressing tools. Accordingly, the pressing tools are preferably designed for only one of the depth stops 33, 34 in order to come into contact with the associated depth stop 33 or 34 when inserted into the plug-in receptacle 31.

[0041] Figures 3 and 4 show, by way of example, a pressing tong 200, 200.1 which can be connected to the drive machine 100. One of the pressing tongs 200, 200.1, in particular the pressing tong 200, is the connected pressing tong 200' of the Figure 1 For example, the pressing tongs 200, 200.1 and the drive device 100 are components of a set.

[0042] In a known manner, the pressing tongs 200, 200.1 each comprise two mutually pivotable pressing jaws 2, 2' and 2.1, 2.1', respectively, which are mounted on at least one, preferably two connecting plates 3, 3' and 3.1, 3.1', respectively, so as to be rotatable about a pivot axis 4, 4', 4.1, or 4.1', respectively. Preferably, the pressing jaws 2, 2' and 2.1, 2.1' are arranged between the connecting plates 3, 3' and 3.1, 3.1', respectively. Preferably, the pivot axes 4, 4' and 4.1, 4.1' are axially parallel to one another. Preferably, the pivot axes 4, 4' or 4.1, 4.1' run transversely, in particular perpendicularly to the surface side 5 of the connecting straps 3, 3' or 3.1, 3.1'.

[0043] Preferably, the pressing jaws 2, 2' or 2.1, 2.1' form a jaw 230 or 230.1 for the workpiece to be pressed, in particular the pipe fitting to be pressed. By pivoting the pressing jaws 2, 2' or 2.1, 2.1' relative to each other, the jaw 230, 230.1 can be moved from an open position, in which the workpiece to be pressed can be received, to a closed position. Preferably, the pressing tongs 200, 200.1 differ in the width of their jaws 230 or 230.1. The "width" refers in particular to the size of the jaw 230 or 230.1 in the closed or pressing position.

[0044] Preferably, the respective pressing tongs 200 or 200.1 have a counter-stop 210 or 210.1 for the respective associated depth stop 33 or 34 of the drive device 100. Preferably, the respective pressing tongs 200 or 200.1 have a counter-coupling point 220 or 220.1 for the coupling point 32 on the connecting part 30 of the drive device 100. The position of the respective counter-stop 210 or 210.1 differs with respect to the position of the respective counter-coupling point 220 or 220.1 for the pressing tongs 200 or 200.1. Accordingly, the respective depth of the associated depth stop 33 or 34 is preferably aligned for the drive device 100.

[0045] For example, in the drive device 100, the depth stops 33, 34 are each arranged at a distance from the coupling point 32 that corresponds to the distance between the counter-stop 210 or 210.1 and the counter-coupling point 220 or 220.1 of the respective associated pressing tongs 200 or 200.1. As a result, the pressing tongs 200, 200.1, when plugged in, utilize the respective depth stops 33 or 34, but are each positioned with their counter-coupling point 220 or 220.1 relative to the connecting part 30 or the coupling point 32. In this way, the pressing tongs 200, 200.1 can be fixed to the connecting part 30 by the same coupling element, in particular the retaining bolt 60, wherein the coupling point 32 of the connecting part 30 is utilized in each case. Preferably, an actuating element 61 is arranged on the retaining bolt 60 in a rotationally fixed manner in order to cause the retaining bolt 60 to move out of its coupling position.

[0046] As can be seen in particular from the Figure 2 As can be seen, the connecting part 30 can comprise two legs 36, 37. The legs 36, 37 preferably extend with their longitudinal extent in the direction of the longitudinal extent of the drive device 100. The legs 36, 37 preferably face the gripping surface 11 with a longitudinal end. The opposite longitudinal end of the legs 36, 37 is preferably a free end, which, for example, forms the head of the drive device 100. The legs 36, 37 preferably run parallel to one another in the direction of their respective longitudinal extent.

[0047] Preferably, the legs 36, 37 enclose a gap 40 between them, which is delimited by preferably plane-parallel walls 38, 39. Preferably, the gap 40 is designed such that lever arms of the connected pressing tongs 200' can be pivoted in ( Figure 1). Preferably, the gap 40 is connected to a cavity or has a cavity in which the rollers 51, 52 of the roller tappet 50 are received and are displaceable in order to actuate the connected pressing tongs 200'.

[0048] Preferably, the gap 40 is used at least partially to form the plug-in receptacle 31. Preferably, the depth stops 33, 34 are arranged at least on one of the legs 36, 37, for example, on the leg 36. Preferably, the depth stops 33, 34 are formed by contact surfaces that extend transversely, in particular orthogonally, to the plane-parallel walls 38, 39. Preferably, a wall section 41 or 42 of at least one of the plane-parallel walls 38, 39 is assigned to each of the depth stops 33, 34.

[0049] Preferably, the width of the plug-in receptacle 31 is adapted to the thickness D of the pressing pliers 200 or 200.1 ( Figures 3 and 4 ) adapted to guide the associated pressing tongs 200 or 200.1 against the associated depth stop 33 or 34 when inserted into the plug-in receptacle 31. Preferably, the plug-in receptacle 31 is formed by the respective wall section 41 or 42 such that the plug-in receptacle 31 tapers in the insertion direction according to arrow E, in particular tapers in steps.

[0050] As further shown in the Figure 2As can be seen, the depth stops 33, 34 can be provided in pairs on one leg 36. Preferably, the counter-stop 210 or 210.1 and a further counter-stop 210' or 210.1' are provided on the pressing tongs 200, 200.1, which form a corresponding counter-pair. With respect to one pair of depth stops 33, 33' or with respect to at least two pairs of depth stops 33, 33' and 34, 34', the depth stops 33, 33' or 33, 33', 34, 34' are each arranged, for example, on opposite longitudinal edge regions of the at least one leg 36.

[0051] A recess 44 may be formed between the edge regions with the pairs of depth stops 33, 33' and 34, 34', or the opposite edge regions with the pairs of depth stops 33, 33' and 34, 34' may be raised relative to an intermediate section therebetween. For example, the recess 44 or the intermediate section is configured such that a tab section 8 of the pressing pliers 200 or 200.1 ( Figures 3 and 4 ) can be received therein when the pressing tongs 200 or 200.1 are inserted into the plug-in receptacle 31 of the drive device 100.

[0052] Preferably, at least two additional depth stops 33.1, 34.1 are also provided on the other leg 37, which correspond to the depth stops 33, 34 of the leg 36. For example, in this case, the two legs 36, 37 are designed to be mirror-symmetrical to one another, at least in the region of the plug-in receptacle 31. When one of the exemplary pressing tongs 200, 200.1 is inserted into the plug-in receptacle 31 of the connecting part 30, the inserted pressing tongs 200 or 200.1 thus comes into contact with both the corresponding depth stop 33 or 34 of one leg 36 and the corresponding depth stop 33.1 or 34.1 of the other leg 37.

[0053] As can be seen from the Figures 3 and 4As can be seen, in the exemplary pressing tongs 200, 200.1, the counter-coupling point 220 or 220.1 is arranged, for example, at a distance from the tongs mouth 230 or 230.1 in such a way that with decreasing mouth width of the tongs mouths 230, 230.1, the counter-coupling point 230 or 230.1 is closer to the respective tongs mouth 230 or 230.1. As can be seen from the Figures 3 and 4 As can also be seen, the pressing tongs 200, 200.1 have a bolt receptacle for the retaining bolt 60 ( Figures 1 and 2 ) is provided.

[0054] Preferably, the bolt receptacle is formed by a bore 6 in the at least one connecting plate 3 or 3.1. Preferably, the other, opposite connecting plate 3' or 3.1' also has a (in the Figures 3 and 4 not visible, but in Figure 5 visible) hole 6', which is aligned, for example, with the hole 6 of the connecting plate 3 or 3.1.

[0055] Preferably, in the pressing pliers 200, 200.1, a surface section 7 of the end face of one connecting plate 3 or 3.1 is configured to form the counter-stop 210 or 210.1. Preferably, viewed in the direction from the bore 6 to the pliers jaws 230 or 230.1, the surface section 7 usable as a counter-stop is arranged in front of the center axis of the bore 6. Preferably, a further surface section 7' of the end face of the at least one connecting plate 3 or 3.1 is configured to form the further counter-stop 210' or 210.1'.

[0056] Preferably, the further surface section 7' usable as a counter-stop is arranged in front of the center axis of the bore 6, viewed in the direction from the bore 6 to the pliers jaw 230 or 230.1. If the connecting part 30 of the drive device 100 also has depth stops 33.1, 34.1 on the other leg 37, corresponding counter-stops can be provided on the other connecting link 3' or 3.1'.

[0057] Preferably, the surface side 5 of the connecting tabs 3, 3' or 3.1, 3.1' serves as a counter-guide for the associated wall section 41 or 42 of the plug-in receptacle 31 of the drive device 100. Preferably, the pressing tongs 200, 200.1 have a different thickness D in the direction of the pivot axes 4, 4' or 4.1, 4.1', wherein the thickness D relates at least to the area that can be inserted into the plug-in receptacle 31 of the drive device 100 and is formed, for example, by surface sides 5 of the opposing connecting tabs 3, 3' or 3.1, 3.1'.

[0058] Figure 5shows a further pressing tongs 200.2, which can be connected to the drive device 100 as an alternative to the pressing tongs 200, 200.1. The pressing tongs 200.2 have, like the pressing tongs 200 and 200.1, a tong mouth 230.2, two pressing jaws 2.2, 2.2', at least one, preferably two connecting plates 3.2, 3.2', two pivot axes 4.2, 4.2', and a counter-coupling point 220.2 for the coupling point 32 of the drive device 100. The pressing tongs 200.2 have the largest dimensions and therefore also the largest mouth width compared to the pressing tongs 200 and 200.1.

[0059] Due to the dimensions of the additional pressing tongs 200.2, a third depth stop 35 is provided on the connecting part 30, which is formed by the opening edge 31.1 of the plug-in receptacle 31. Preferably, the opening edge 31.1 is the edge on the front end face of the plug-in receptacle 31 or the connecting part 30. Preferably, the additional pressing tongs 200.2 have a counter-stop 210.2 for the third depth stop 35.

[0060] In order to bring the counter-stop 210.2 of the third pressing tongs 200.2 into contact with the third depth stop 35 when the third pressing tongs 200.2 are inserted into the plug-in receptacle 31, the counter-stop 210.2 is arranged at a distance from the counter-coupling point 220.2 that corresponds to the distance between the third depth stop 35 and the coupling point 32 on the connecting part 30. Preferably, the third depth stop 35 is arranged or formed on one of the legs 36, 37, in particular the leg 36. In principle, a corresponding depth stop 35.1 can also be arranged or formed on the other leg 37. List of reference symbols

[0061] 2, Press jaw 2.1, Press jaw 2.2, 2.2' Press jaw 3, 3' 4, Connecting lug 2' 2.1' 3.1, 3.1' Connecting lug 3.2, 3.2' Connecting lug 4' Swivel axis 4.1, 4.1' Swivel axis 4.2, 4.2' Swivel axis 5 Surface side 6, 6' Bore 7, 7' Surface section 8 Lug section 10 Grip surface 11 Housing 13 Energy storage 30 Connecting part 31 Plug-in receptacle 31.1 Opening edge 32 Coupling point 32.1 Bolt receptacle 33, 33' Depth stop 33.1 Depth stop 34, 34' Depth stop 34.1 Depth stop 35, 35.1 Depth stop 36 Leg 37 Leg 38 Wall 39 Wall 40 Gap 41 Wall section 42 Wall section 44 Recess 50 Roller tappet 51 Roller 52 Roller 53 Arrow 60 Retaining bolt 61 Actuating element 100 Drive device 200 Pressing tongs 200.1 Pressing tongs 200.2 Pressing tongs 200' Connected pressing tongs 210, 210' Counter-stop 210.1, 210.1' Counter-stop 210.2 Counter-stop 220 Counter-coupling point 220.1 Counter-coupling point 220.2 Counter-coupling point 230 Pliers jaws 230.1 Pliers jaws 230.2 Pliers jaws 300 Pressing machine EP File D Thickness L Longitudinal axis

Claims

1. Set with a drive device (100) and at least two pressing tools (200, 200.1) that can be alternatively connected thereto, the drive device (100) comprising a gripping surface (10), a connecting part (30) for connecting the pressing tools (200, 200.1) and a roller plunger (50) for activating the connected pressing tool (200'), wherein the connecting part (30) is disposed on the front on the drive device (100) and has a plug-in receptacle (31), which is upstream in the plug-in direction (E) of the gripping surface (10) and into which each of the pressing tools is insertable from the front of the drive device (100), wherein furthermore the connecting part (30) has a coupling point (32) in order to effect a force coupling between the connecting part (30) and the pressing tool inserted into the plug-in receptacle (31), characterized in that at least two depth stops (33, 34) are provided on the connecting part (30) at different depths of the plug-in receptacle (31), and that the pressing tools (200, 200.1) are each designed for only one of the depth stops (33, 34) and have a counter stop (210; 210.1) for the respective corresponding depth stop (33; 34) in order to come into contact with the associated depth stop (33; 34) when inserted into the plug-in receptacle (31).

2. Set according to Claim 1, characterized in that provided in the pressing tools (200, 200.1) is in each case a counter-coupling point (220; 220.1) which is operatively connectable to the coupling point (32) and which is present at a spacing from the counter stop (210; 210.1), and in that in the drive device (100), the depth stops (33, 34) are in each case disposed at a spacing relative to the coupling point (32), the spacing corresponding to the spacing between the counter stop (210; 210.1) and the counter-coupling point (220; 220.1) of the respective pressing clamp (200; 200.1).

3. Set according to Claim 1 or 2, characterized in that the connecting part(30) comprises two legs (36, 37), which between themselves enclose a gap (40) which is delimited by plane-parallel walls (38, 39) and which is used for forming the plug-in receptacle (31), wherein the depth stops (33, 34) are disposed on at least one of the legs (36, 37).

4. Set according to Claim 3, characterized in that at least one of the depth stops (33, 34) is assigned a wall portion (41) of at least one of the plane-parallel walls (38, 39), wherein the width of the plug-in receptacle (31) is adapted to the thickness (D) of the assigned depth stop (33) of the associated pressing tool (200) by the wall portion (41) so as to guide the associated pressing tool (200) against the assigned depth stop (33) during insertion into the plug-in receptacle (31).

5. Set according to Claim 3 or 4, characterized in that the depth stops (33, 34) are in each case assigned a wall portion (41; 42) of at least one of the plane-parallel walls (38, 39), wherein by way of a plug-in portion the width of the plug-in receptacle (31) is adapted to the thickness (D) of the assigned depth stop (33; 34) of the associated pressing tool (200, 200.1) by the respective wall portion (41; 42), and the plug-in receptacle (31) is tapered in the plug-in direction (E) by the respective wall portion (41; 42).

6. Set according to one of Claims 3 to 5, characterized in that the depth stops (33, 34) are provided in pairs on the at least one leg (36), and the depth stops (33, 33'; 34, 34') of at least one pair are disposed on opposite longitudinal peripheral regions of the at least one leg (36).

7. Set according to Claim 6, characterized in that the at least one leg (36) at least in the region of its walls delimiting the plug-in receptacle (31), is embodied symmetrically with respect to a central plane extending orthogonally to the plane-parallel walls (38, 39).

8. Set according to one of Claims 3 to 7, characterized in that the two legs (36, 37), at least in the region of the plug-in receptacle (31), are designed mirror symmetrically to one another.

9. Set according to one of Claims 2 to 8, characterized in that the pressing tools (200, 200.1) are pressing clamps, the counter-coupling point (220; 220.1) of which is disposed at a spacing from the jaw (230; 230.1) in such a way and so that with a decreasing jaw width of the jaws (230, 230.1) the counter-coupling point (220; 220.1) lies closer to the respective jaw (230; 230.1).

10. Set according to one of Claims 2 to 9, characterized in that the pressing tools (200, 200.1) are pressing clamps each equipped with two mutually pivoting press jaws (2, 2'; 2.1, 2.1'), which are in each case mounted on at least one connecting lug (3; 3.1) so as to be rotatable about a swivel axis (4; 4'; 4.1; 4.1'), and the swivel axes (4; 4'; 4.1; 4.1') are axially parallel to one other and perpendicular to the surface side (5) of the connecting lug (3; 3.1), wherein the counter-coupling point (220; 220.1) is formed by a bore (6) in the at least one connecting lug (3; 3.1), and a surface portion (7; 7') of the end face of the at least one connecting lug (3; 3.1) is configured to form the counter stop (210, 210.1), and when viewed in the direction from the bore (6) to the jaw (230; 230.1), the surface portion (7; 7') which is able to be utilized as a counter stop is disposed in front of the central axis of the bore (6).

11. Set according to Claim 10, characterized in that the pressing tools (200, 200.1) have different thicknesses (D) in the direction of the swivel axes (4, 4'; 4.1, 4.1').

12. Set according to one of the preceding claims, characterized in that the set has three pressing tools (200, 200.1, 200.2) with different jaw widths that are alternatively connectable to the drive device (100), wherein a third depth stop (35), which is formed by the opening edge (31.1) of the plug-in receptacle (31), is provided on the connecting part (30) of the drive device (100) wherein a counter stop (210.2) for the third depth stop (35) and a counter-coupling point (220.2) for the coupling point (32) of the connecting part (30) are provided on one of the pressing tools (200, 200.1, 200.2), and wherein the counter stop (210.2) is disposed at a spacing relative to the counter-coupling point (220.2), the spacing corresponding to the spacing between the third depth stop (35) and the coupling point (32).

13. Pressing machine (300) with a drive device (100) and a pressing tool (200, 200.1) selected from the set according to one of the preceding claims, wherein the pressing tool (200) is inserted into the plug-in receptacle (31) of the connecting part (30) against one of the depth stops (33, 34), and is fixed to the connecting part (30) by a retaining bolt (60) while utilizing the coupling point (32).