Device head of hydraulically actuatable tool device

Abstract

The invention relates to a device head (1) of a hydraulically actuatable tool device (W), comprising a counter-holder (2) which is formed integrally in one piece on the device head (1) and which has a receptacle for a first tool (3), and comprising a second tool (5) which can be moved towards the counter-holder (2) by means of a hydraulic piston (6), the cylindrical structure (4) associated with the hydraulic piston (6) is likewise arranged in one piece with the device head (1). In order to advantageously design the device head, it is proposed that the device head (1) also has an integrally one-piece engagement profile (8) for the angularly fixed but variable arrangement of the holding rod (9).

Description

[0001] The present application is a divisional application of the prior application with the title "Device head of a hydraulically operable tool device", the filing date of 08.10.2020 and the application number 202080081161.1. TECHNICAL FIELD

[0002] The invention relates to a device head of a hydraulically operable tool device, which has a corresponding holder which is integrally one-piece configured on the device head, which has a receiving part for a first tool, and which has a second tool which is movable towards the corresponding holder by means of a hydraulic piston, wherein a cylindrical structure associated with the hydraulic piston is likewise integrally one-piece provided with the device head. BACKGROUND

[0003] Device heads of the aforementioned type are known in different design forms. They are combined with hydraulic drive devices, for example, for pressing, cutting or punching workpieces, for which corresponding first and second tools are provided in the device head or on the hydraulic piston. Reference is made, for example, to the patent EP 1084798 B1 (US 6,718,870 B1).

[0004] It is furthermore known that the device head is configured substantially one-piece and consists of the same material, thus integrally one-piece having the corresponding holder and the cylindrical structure for directly or indirectly receiving and guiding the hydraulic cylinder.

[0005] From US 2016 / 0344170 A1, an electrically operated device head is known, wherein the device head comprises two housing halves and a frame element. The frame element is formed with an engagement profile. SUMMARY

[0006] On the basis of the first-mentioned prior art, the technical problem addressed by the invention is to advantageously design a device head of the aforementioned type with a second tool which is movable by means of a hydraulic piston.

[0007] The technical problem is solved in a device head of a hydraulically operable tool device of the type mentioned at the outset, wherein it is provided that the device head also has an engagement profile which is integrally one-piece configured, for angularly fixed but variably arranging a holding bar.

[0008] Using such a holding bar, for example, it is possible to use the device head with the user away from the body. In addition or alternatively, the use of the holding bar can stabilize the device head in the working position. Thus, by means of the holding bar, for example, work at a height above head height, at least at a distance of at least, for example, 1 meter or more, can be achieved. Here, in particular the device head, if necessary also the hydraulic unit acting on the hydraulic cylinder, is no longer held directly or only with the hand, but at least additionally by means of the holding bar.

[0009] The holding bar can have a fixed length of, for example, 0.5 m, 1 m, 2 m up to, for example, 3 m, wherein also any intermediate size, for example between 0.5 and 3 m, can be provided as fixed length. In one possible design, the holding bar can also be designed to be adjustable in its length, for example by means of a telescopic design, thus, for example, having a telescopic length of 0.5 to 2 m.

[0010] Due to the provision of the engagement profile on the device head, it is facilitated to operate by means of the holding bar. This enables an angular, fixed arrangement of the holding bar with respect to a longitudinal central axis of the device head, which can at the same time be the axis of rotation of the hydraulic cylinder or hydraulic piston, if necessary. This angular arrangement of the holding bar is preferably changeable, for which the shape engagement provided by the engagement profile can be temporarily released.

[0011] The engagement profile, which is configured integrally in one piece, can have a tooth-like protrusion, if necessary only one such tooth-like protrusion, which protrudes compared to the surrounding surface of the device head, or alternatively a tooth-like recess, if necessary also only one tooth-like recess, which is recessed compared to the above-mentioned surface of the device head.

[0012] The second tool can be movable by means of the hydraulic piston between a starting position and a work end position, wherein the hydraulic piston can act on a piston rod configured in one piece with the accommodation for the second tool and the piston rod can be accommodated completely in the cylindrical structure in the starting position.

[0013] Here, the work end position does not necessarily have to be the maximum achievable end position of the hydraulic piston, if necessary stop-limited. Rather, the work end position can be a movement position of the hydraulic piston in which the tool, in prescribed use, carries out a measure to be carried out. From this work end position reached, the hydraulic piston can be moved back automatically, if necessary, due to an implemented valve opening in the hydraulic system, towards the starting position.

[0014] The accommodation for the second tool can, as preferred, be configured in one piece with the piston rod on which the preferably hydraulic piston can act and more preferably be configured from the same material. This also provides advantages in terms of manufacturing and assembly technology.

[0015] Here, the hydraulic piston can, as additionally preferred, be provided without a connection to the piston rod or alternatively be detachably connected to the piston rod.

[0016] Due to the complete accommodation of the piston rod in the cylindrical structure, which is also achieved in the starting position, for example when changing the device head or when storing the device head, the piston rod is protected from direct damage from the outside.

[0017] Advantageously, in a preferred one-piece design of the device head and a further one-piece design of the piston rod and the accommodation for the second tool, the tool accommodation can be removed together with the piston rod, for example, via the device port remaining between the corresponding holder and the cylindrical structure of the device head.

[0018] The second tool can be movable by means of the hydraulic piston between a starting position and an end-of-work position, wherein the piston rod can have an enlarged accommodation for the second tool transverse to the movement direction of the hydraulic piston, and the accommodation is held in a undercut constructed on the device head transverse to the movement direction in the end-of-work position.

[0019] For the construction of the undercut, the accommodation can have, for example, a raised area which is covered by a cover section of the device head in a direction transverse to the movement direction of the accommodation. Alternatively, the accommodation can also have a cover section and the device head can also have a raised area which cooperate in this way. Thus, in particular the accommodation, if necessary also the piston rod connected to the accommodation, is guided and prevented from moving in a direction transverse to the movement direction, in particular in the end-of-work position.

[0020] Viewed in a longitudinal cross-section of the device head in which the rotation axis of the hydraulic piston appears as a line, the engagement profile is designed to be laterally offset but overlaps the cylindrical structure. This overlap can here be produced in a radial direction with respect to the hydraulic piston axis. Here, the overlap can also be produced in the region of the piston rod, if necessary both in the starting position of the hydraulic piston and in the end-of-work position.

[0021] The cylindrical structure can accordingly transition in the region of the engagement profile into an arm which is reduced in thickness compared to the diameter of the cylindrical structure, which is formed integrally and in one piece with the cylindrical structure. Furthermore, the arm can carry the corresponding holder in an elongation which is essentially oriented in the same direction as the hydraulic piston axis.

[0022] The engagement profile can be constructed concentrically around a central through-hole, for example for the passage of clamping means, further for example for the passage of a clamping bolt. If a plurality of tooth-like protrusions or recesses of the engagement profile are provided, these are preferably positioned overall circularly or circularly-arcuately with respect to the geometric centre axis of the through-hole.

[0023] In the case of a plurality of tooth-like protrusions or recesses of the engagement profile, these can also be arranged uniformly spaced relative to one another in a circumferential direction with respect to the geometric centre axis of the through-hole.

[0024] The accommodation for the second tool can preferably be configured in one piece with the piston rod and more preferably from the same material, on which the hydraulic piston can preferably act. This also offers advantages in terms of manufacturing and assembly technology. Here, the hydraulic piston can as is otherwise preferred be arranged not to be connected with the piston rod or alternatively to be detachably connected with the piston rod.

[0025] As a result of this design, the accommodation can be configured in one piece with the piston rod and be inserted into the device head during assembly or removed from the device head during disassembly.

[0026] To this end, the accommodation can also be able to be displaced transversely to the movement direction in a starting position in order to be assembled and disassembled, which starting position can preferably correspond to a basic position of the device head which is not loaded by the hydraulic piston. This can also be achieved, inter alia, in that the device head is not provided or can be cancelled in at least this starting position with an undercut which is preferably provided in the working end position. In a preferred design, this undercut and the resulting guidance and anti-rotation and anti-tilt fixation are only achieved when the accommodation is moved out of the starting position and towards the working end position.

[0027] The resulting displaceability of the accommodation in a direction transverse to the movement direction makes it possible to advantageously assemble or disassemble an accommodation which is configured in one piece with the piston rod, inter alia, wherein, as a result of the achieved tilting ability, the accommodation can be brought into the columnar structure during assembly or removed from the columnar structure during disassembly.

[0028] In a further design, the device head can be connected with a hydraulic hose, which at the other end can be connected with a hydraulic unit, so that the device head can be moved freely relative to the hydraulic unit which generates the hydraulic pressure. The hydraulic hose can here have a length which allows the device head to be moved substantially freely when the hydraulic unit is placed on the ground or for example at table height. The arrangement of the holding rod is particularly useful in this configuration. This configuration allows the device head to be used, for example, at head height above, and in addition inter alia allows use to be made at a distance of for example one to two metres or more from the user.

[0029] Furthermore, the device head can be rigidly connected with a machine tool component in which the hydraulic unit is arranged. Such a machine tool component is known, for example, from document EP 1519813 B1 (US 7,254,982 B2). The content of this document is hereby fully incorporated into the disclosure of the present application, also in order to incorporate the features of this document into the claims of the present application.

[0030] The body tool part can be used by the user at the same time as a handle for guiding the device head. In the arrangement of the body tool part, the arrangement of the holding rod or the use of the holding rod arranged on the device head can be dispensed with. However, the holding rod set up can additionally hold or guide the combined and rigid device head and body tool part if necessary.

[0031] Here, the hydraulic piston can be accommodated completely in the cylindrical structure in the starting position. Thus, the hydraulic piston or components of the hydraulic piston preferably do not protrude beyond the cylindrical structure in the axial direction, if necessary not beyond the hydraulic cylinder constituted thereby. This provides advantages, for example, in the case of a device head not being connected to a hydraulic hose or body tool part, thus, for example, during the exchange of the device head or the storage of the device head. Damage to the hydraulic piston or components of the hydraulic piston due to a free protrusion beyond the end of the cylindrical structure is prevented by the design according to the application.

[0032] The cylindrical structure can also have a connection accommodation for the body tool part or the hydraulic hose outside the region surrounding the hydraulic piston with reference to the starting position of the hydraulic piston, the direction of movement of the hydraulic piston from the working end position to the starting position or the extension along the axis of rotation of the hydraulic piston. This connection accommodation is spaced apart from the hydraulic piston in the axial direction or the direction of movement of the hydraulic piston, both preferably in the starting position and in the working end position and in any position between the two end positions. This can achieve further assembly-technical advantages.

[0033] The connection accommodation can have a free inner diameter, which can be greater than the diameter of the cylindrical structure in the region in which the cylindrical structure surrounds the hydraulic piston in the starting position. The cylindrical structure can here simultaneously and directly constitute the hydraulic cylinder in the region surrounding the hydraulic piston, accordingly having a cylinder inner face which substantially cooperates with the hydraulic piston.

[0034] The section with the connection accommodation can more preferably also be configured integrally in one piece with the cylindrical structure, which section can here have an inner diameter which can be, for example, approximately 1.05 to 1.3 times, further for example approximately 1.1 times, the inner diameter of the cylindrical structure.

[0035] In one possible design, the hydraulic piston can be constituted by the piston rod and a cover part arranged on the end facing away from the second tool. The piston rod can here be surrounded by a return spring, which can be supported in an end region on the cover part. In this case, the end of the spring facing away from the cover part is supported on a section of the cylindrical structure of the device head.

[0036] The piston rod can also be designed as a hollow cylinder over a portion of its length, for example over 50% to 95% of its length, if necessary even over the entire length. A weight saving in the region of the piston rod is thus achieved first of all. Advantageous stress conditions can also be achieved in the region of the tool which can be moved by means of the hydraulic piston thereby.

[0037] The clamping screw can hold the cover part here through the hollow cylinder. The clamping screw can cooperate here on the end side with a threaded hole which can be configured in the piston rod or in a tool receptacle connected to the piston rod for accommodating a second tool.

[0038] It is possible for an adapter part to be arranged on the connection receptacle, for example for connecting a hydraulic hose or a fuselage tool part. Different adapter parts can be provided accordingly. The piston crown can oppose here in the starting position an end face on the piston side of the adapter part.

[0039] In a further, likewise preferred design, the device head can be designed in the described longitudinal cross section as a C in its entirety, wherein a production using a precision casting method or using a metal printing method can also be provided in this regard. An integral one-piece construction can be achieved thereby. According to one possible design, for example titanium can be used as a material for producing the device head. BRIEF DESCRIPTION OF DRAWINGS

[0040] The application is explained below with reference to the drawings, but the drawings merely represent examples. The components which are described only with respect to one of these examples and in further examples are also described for this further example as components which are at least possible in the further examples, without the other different components being replaced by them there. In the drawings:

[0041] Figure 1 A first embodiment of a device head with a holding rod is shown schematically, wherein the device head is connected to a drive unit by means of a hydraulic hose;

[0042] Figure 2 A longitudinal cross-sectional view of a device head with a holding rod and a hydraulic hose is shown in Figure 1 enlarged scale;

[0043] Figure 2a A cross-sectional view according to Figure 2 line Ha-Ha in

[0044] Figure 3 An enlarged view of the region III in Figure 2 is shown;

[0045] Figure 4 In the longitudinal cross-sectional view of Figure 1a side view in which the device head is shown in enlarged scale;

[0046] Figure 5 a perspective view in which the device head is shown in enlarged scale; Figure 4 a side view in which the device head is shown in enlarged scale;

[0047] Figure 6 a perspective view in which the device head is shown in enlarged scale;

[0048] Figure 7 a perspective view in which the device head is shown in enlarged scale; Figure 6 a perspective view in which the device head is shown in enlarged scale;

[0049] Figure 8 a perspective view in which the device head is shown in enlarged scale; Figure 5 a perspective view in which the device head is shown in enlarged scale;

[0050] Figure 9 a side view in which the device head is shown in enlarged scale, but the device head is arranged on the fuselage tool part; Figure 4 a side view in which the device head is shown in enlarged scale, but the device head is arranged on the fuselage tool part;

[0051] Figure 10 a longitudinal cross-sectional view of the device according to Figure 9 a longitudinal cross-sectional view of the device according to

[0052] Figure 11 a longitudinal cross-sectional view of the device according to Figure 10 a longitudinal cross-sectional view of the device according to

[0053] Figure 12 a longitudinal cross-sectional view of the device according to Figure 4 a longitudinal cross-sectional view of the device according to

[0054] Figure 13 a longitudinal cross-sectional view of the device according to Figure 3 a longitudinal cross-sectional view of the device according to Figure 12 a longitudinal cross-sectional view of the device according to

[0055] Figure 14 a longitudinal cross-sectional view of the device according to Figure 13 a longitudinal cross-sectional view of the device according to

[0056] Figure 15 a longitudinal cross-sectional view of the device according to Figure 13 a longitudinal cross-sectional view of the device according to

[0057] Figure 16 a longitudinal cross-sectional view of the device according to Figure 13 a longitudinal cross-sectional view of the device according to DETAILED DESCRIPTION

[0058] First, a first embodiment of a device head 1 of a hydraulically steerable tool device W is shown and described with reference to Figures 1 to 11 First, a first embodiment of a device head 1 of a hydraulically steerable tool device W is shown and described with reference to

[0059] The device head 1 is preferably constructed in one piece integrally with the corresponding holder 2 for accommodating the first tool 3, and the device head also has a further one-piece cylindrical structure 4 in which a hydraulic piston 6 acting on the second tool 5 can be linearly moved directly or indirectly guided.

[0060] The cylindrical structure 4 can be directly formed as a hydraulic cylinder 7 in which the hydraulic piston 6 is guided.

[0061] Further provided on the device head 1 in one piece integrally therewith is an engagement profile 8 for angularly fixed but variable arrangement of a holding bar 9.

[0062] The device head 1 constructed in one piece can be designed overall as substantially C-shaped with reference to a side view according to Figure 4 or with reference to a longitudinal cross-sectional view according to Figure 3 in which the hydraulic piston axis x is shown as a line, wherein one C-shaped arm forms the above-mentioned corresponding holder 2 and the opposite C-shaped arm essentially forms the cylindrical structure 4. These C-shaped arms are connected to one another by a connecting arm 10 (connection of the C-shaped base body) which extends essentially in the orientation of the hydraulic piston axis x.

[0063] The cylindrical structure 4 in the shown embodiment directly provides a working surface for the hydraulic piston 6 on the inside of the wall, which can be designed essentially as a cylinder on the outside of the wall with respect to a cross section transverse to the orientation of the axis x. In this cross section, the section of the connecting arm 10 which connects to the cylindrical wall of the cylindrical structure 4 can, likewise preferably, extend essentially in a radial direction with respect to the axis x, wherein the dimension of the wall thickness of the connecting arm 10 in this connection in a direction perpendicular to the axis x is smaller than the dimension of the outer diameter of the cylindrical structure 4. Thus, the thickness of the connecting arm 10 in this connection can be equal to approximately 0.3 to 0.7, further approximately 0.5, times the outer diameter of the cylindrical structure 4.

[0064] The corresponding holder 2 forms a first tool holder 11. The first tool 3 can be arranged lockably exchangeably in the first tool holder.

[0065] A second tool holder 12 can be moved towards the first tool holder 11 or a first tool 3 accommodated therein, which is preferably constructed in one piece with the piston rod 13 extending in the cylindrical structure 4 and consists of the same material. The tool holder 12 constitutes an accommodation A for the second tool 5, which is also preferably held exchangeably. The axis length of the piston rod 13 can here be equal to approximately 1.3 to 2.5 times the maximum movement stroke of the hydraulic piston 6.

[0066] The second tool holder 12 can be referred to with reference to a side view according to Figure 2aThe cross-sectional view of the second tool holder 12 transverse to the axis x is designed as a substantially elongated rectangle. In the embodiment shown, in the state of use, according to Figure 2a The vertically extending longitudinal edges are configured as elongated straight lines, while the shorter edges, viewed transversely thereto, are guided along arcuate lines, respectively. These arcuate lines have a common radius with respect to the axis x. The radius dimension is adapted to the diameter dimension of the surrounding housing wall of the cylindrical structure 4. In order to fix the second tool holder 12 in the circumferential direction, respectively in order to prevent a rotation about the axis x, the second tool holder 12, as also shown, can have on the outside of the wall in the region of the curved surface an axially extending retaining groove 14 open to the housing wall, in which, in the usual operating state, as also shown, a retaining screw 15 can be inserted, which is accommodated in a threaded hole 22 of the second tool holder 12. Figure 3 The cylindrical structure 4 in the starting position shown extends substantially up to the end face 59 of the second tool holder 12 facing the first tool holder 11 and is guided therein. After loosening of the retaining screw 15 or removal of the screw, preferably after removal of the further clamping screw 21, the cover part 20 and possibly the spring 18, as explained in more detail below, the second tool holder 12 together with the piston rod 13 configured in one piece with the tool holder 12 can be introduced or can be assembled accordingly through the free device port M, which is, for example, according to Figure 3 The starting position according to the figure is produced between the first tool holder 11 and the second tool holder 12. For this purpose, it is necessary to rotate the tool holder 12 about the axis x, if necessary preferably by approximately 90°.

[0067] As also shown, the section of the cylindrical structure 4 accommodating the second tool holder is enlarged in diameter compared to the section of the cylindrical structure 4 in which the hydraulic piston 6 is guided. Thus, the inner diameter of the section of the cylindrical structure 4 surrounding the second tool holder 12 can be equal to approximately 1.05 to 1.2 times the inner diameter of the section surrounding the hydraulic piston 6.

[0068] In the transition from the section of the cylindrical structure 4 surrounding the second tool holder 12 to the section surrounding the hydraulic piston 6, respectively on the inside of the wall, a step is produced, which can also form a stop 16 projecting radially inwards and which is substantially annular overall. The second tool holder 12 can abut against this stop 16 in the starting position.

[0069] The piston rod 13 connected substantially concentrically with the axis x on the second tool holder can be designed according to the figure substantially as a hollow cylinder 23 over its entire axial length. The outer diameter of this hollow cylinder is here smaller than the inner diameter of the relevant section of the cylindrical structure 4, so that an annular space 17 surrounding the piston rod 13 is formed. Here, the outer diameter of the piston rod 13 can be equal to approximately 0.5 to 0.8 times the inner diameter of the section of the cylindrical structure 4 surrounding the hydraulic piston 6.

[0070] In the annular space 17, a spring 18 in the form of a cylindrical compression spring, for example, is arranged which surrounds the piston rod 13. The spring 18 is supported at its end facing the second tool holder 12 by means of a circular ring-shaped pressure disk 19 on the stop 16 of the device head 1, while the axially oppositely situated end acts on the axially facing underside of a cover part 20 of the piston rod 13.

[0071] Here, the cover part 20 is arranged on the free end of the end side of the piston rod 13, which preferably projects uniformly radially beyond the outer jacket wall of the piston rod 13. The spring 18 preferably acts on the thus formed radial step.

[0072] The cover part 20 can be fixed by means of a clamping bolt 21 oriented along the axis x, which penetrates the cover part 20 in the region of an opening 22 which is concentrically oriented with the axis x. Furthermore, the clamping bolt 21 penetrates a hollow cylinder 23 of the piston rod 13 over its entire length and is screwed at the end into a correspondingly located threaded hole 24 of the second tool holder 12.

[0073] On the basis of the above-described arrangement, by means of the spring 18, the second tool holder 12 is loaded towards a starting position, for example shown in Figure 3 , in which the tool holders 11 and 12 or the tools 3 and 5 accommodated therein have the greatest distance from one another viewed in the axial direction.

[0074] The hydraulic piston 6 is arranged to act on the end of the piston rod 13 which is provided with the cover part 20. For this purpose, as also shown, the hydraulic piston 6 can have a generally pot shape, which has a piston wall 25 which surrounds concentrically with the axis x, which can radially, as can be seen, encompass a partial section of the spring 18 radially outward.

[0075] The piston head 26 acts with its pot-internal face on the axially facing end face of the cover part 20, wherein the inner surface of the piston head in connection therewith can also have a central recess 27, for example for accommodating the head part 28 of the clamping bolt 21.

[0076] Furthermore, in this respect a stepped recess can be produced, which serves, among other things, for accommodating the cover part 20 and accommodating the bolt head 28, preferably over its entire axial thickness (see, for example, the illustration in Figure 11 ).

[0077] The inner surface of the piston head can thus also serve as a support surface for the spring 18, so that the spring 18 exerts a restoring force on the hydraulic piston 6 towards the starting position, directly or only indirectly via the cover part 20.

[0078] In the region of the piston head 26, a seal 29 is accommodated in a radially outwardly open peripheral annular groove for sealing the hydraulic piston 6 against the inner wall 30 of the hydraulic cylinder 7 formed by the cylindrical structure 4.

[0079] With reference to a longitudinal cross-section according to Figure 3 the engagement profile 8 for securing the holding rod 9 can, and preferably is, designed to be laterally offset in the region of the connecting arm 10 relative to the cylindrical structure 4, here preferably radially overlapping the cylindrical structure 4, i.e. in a projection of the engagement profile 8 in a direction transverse to the axis x and towards the cylindrical structure 4, the engagement profile 8 is substantially accommodated in this cylindrical structure.

[0080] As also shown, the engagement profile 8 can be configured only on one side of the connecting arm 10. To this end, a through-hole 31 can be provided which completely penetrates the connecting arm 10, and a plurality of recesses 32 can be provided concentrically around the connecting arm 10, which are uniformly spaced relative to one another in the circumferential direction and preferably identically configured in order to configure the engagement profile 8. According to Figure 7 twelve such recesses 32 can be provided which are uniformly distributed around the through-hole 31.

[0081] The holding rod 9, which can be secured by the engagement profile 8, has a corresponding engagement profile 34 at the holding end 33, which according to the shown embodiment can be configured with a plurality of protrusions 35, the number of which corresponds to the number of recesses 32 of the engagement profile 8. These protrusions 35 can also be identically designed in terms of their cross-sectional design and depth, wherein they can be uniformly spaced relative to one another in the circumferential direction, in correspondence with the arrangement of the recesses 32.

[0082] The protrusions 35 are matched to the recesses 32 in terms of cross-section, so that a form-fit of the holding rod 9 to the device head 1 in the form of an end-toothed disc (Hirth tooth) can be achieved on the basis of the engagement of the protrusions 35 with the recesses 32.

[0083] With the exemplarily provided twelve recesses 32, the holding rod 9 can be angularly secured at 30-degree intervals relative to this embodiment. Between the hydraulic piston axis x, which substantially coincides with the longitudinal axis of the device head 1, and the longitudinal axis y of the holding rod 9, a correspondingly different angle a can be enclosed.

[0084] With the arrangement of the protrusions 35 on the holding end 33 of the holding rod 9, a threaded hole 36 can also preferably be provided in the centre of the holding end 33. In the mounted position of the holding rod 9, this threaded hole 36 overlaps the through-hole 31 of the device head 1.

[0085] In order to determine the found oriented position of the holding lever 9 and accordingly to determine the associated form-fit position between the engagement profile 8 and the corresponding engagement profile 34, a fixing bolt 37 can be provided, which penetrates the through-hole 31 from the side opposite the engagement profile 8 and is inserted in the threaded hole 36 of the holding lever 9. Clamping the holding lever 9, in particular the corresponding engagement profile 34, to the engagement profile 8 of the device head 1 can be achieved by means of an operating knob 38 connected on the end opposite the end cooperating with the threaded hole 36.

[0086] The holding lever 9 can be pivoted about a geometric pivot axis z, which is provided by the fixing bolt 37 and extends perpendicular to the axes x and y.

[0087] Using the holding lever 9 thus oriented and fixed to the device head 1, the device head 1 can also be brought to a remote working position and / or the device head 1 can be supported by the holding lever 9, etc.

[0088] It can also be seen from the figures that the cylindrical structure 4 can further extend beyond the hydraulic piston 6, in particular the piston head 26, in the direction of extension of the axis x away from the second tool holder 2. Accordingly, the hydraulic piston 6 is also completely located in the cylindrical structure 4 in the starting position.

[0089] The section of the cylindrical structure 4 that protrudes beyond the piston head 26 in the starting position can form a connection receptacle 39 for an adapter part 40. Here, the free inner diameter a in the area of the connection receptacle 39 can, and preferably is, selected to be, for example, 1.05 to 1.2 times larger than the free inner diameter b in the area of the section of the cylindrical structure 4 that forms the hydraulic cylinder 7.

[0090] Furthermore, an internal thread can be configured on the inside of the wall of the connection receptacle 39 for cooperation with an external thread in the area of an adapter part wall 41 of the adapter part 40 around it. The adapter part wall 41 can also, and preferably also, have a sealing element 42 that is inserted in a groove on the outside of the wall that opens radially outward and that acts on the inner wall 30 of the cylindrical structure 4 or the connection receptacle 39.

[0091] The adapter part base 43, which is oriented transversely to the axis x, leaves an inflow opening 44 for the hydraulic medium in the middle, which is accordingly traversed by the geometric axis x in the center. This inflow opening 44 is surrounded on the outside or away from the hydraulic piston 6 by a short columnar adapter part joint 45.

[0092] The surface of the adapter part base 43 that faces away from the hydraulic piston 6 can be essentially flush with the corresponding end face of the cylindrical structure 4.

[0093] Furthermore, the adapter part 40 can be fixed in the position of use screwed into the connection receptacle 39 by means of a threaded pin 46 which penetrates the wall of the connection receptacle 39.

[0094] According to Figures 1 to 8 The first application shown, the device head 1 can be operated by means of a separate hydraulic unit 47, wherein a hydraulic hose 48 is arranged between the hydraulic unit 47 and the device head 1 so that the device head 1 can be moved freely. It can be seen that the hydraulic hose 48 is connected at one end to the hydraulic unit 47 and at the other end is connected to the device head 1 by means of a hose connection 58, the sealing of which is achieved by means of the adapter part 40.

[0095] The corresponding hydraulic pressure is generated by means of the hydraulic unit 47.

[0096] In order to move the hydraulic piston 6 and thus the tool holder 12 carrying the second tool 5 towards its working end position, which is shown schematically in Figure 3 by means of a dotted line, the hydraulic fluid is pumped into the space created between the adapter part 40 and the piston head 26, so that as a result of the increase in hydraulic pressure generated in the process, the hydraulic piston is moved in the direction c against the return force of the spring 18.

[0097] When the working end position is reached, the pressure reduction can be effected automatically or by means of user intervention, but if necessary also before the working end position is reached, so that an automatic return of the hydraulic piston 6 and thus of the second tool holder 12 in the movement direction d into the starting position can be effected.

[0098] Alternatively, the device head 1 can be connected with a machine body tool part 49, as is additionally shown in Figures 9 to 11 The adapter part 40 can also be used to connect the device head with the machine body tool part, if necessary using the same adapter part 40 which is also used to connect the hydraulic hose 48, but alternatively using an adapter part 40 which is separate for the machine body tool part 49.

[0099] The machine body tool part 49 can be designed overall as a substantially longitudinally extending bar, which in principle supports single-handed operation of the device. Further support can be provided in the region of the device head 1 by means of possible arrangements of the holding bar 9. The tool device W thus composed of the machine body tool part 49 and the device head 1 can also be used separately without the holding bar 9, which is why the holding bar 9 is only optionally indicated in the illustration of the second embodiment by means of a dotted line. The tool-free detachable arrangement of the holding bar 9 by means of the fixing screws 37 provides this optional arrangement.

[0100] A rod-shaped fuselage tool part 49 is known from the patent EP 1519813 B1 cited at the beginning. The content of this patent is hereby fully incorporated into the disclosure of the present application also in order to include the features of this patent in the claims of the present application, especially with regard to the functionality of the fuselage tool part 49.

[0101] With reference to the illustrations in Figure 10 , with regard to the design of the fuselage tool part 49 it can be seen that the technical solution described in the mentioned patent EP 1519813 B1 is for example associated with regard to the non-return valve 50, the reservoir 51 and the pump ram 52. Here, it can also be seen in general that the hydraulic medium pump 53 and the electric motor 54 for the hydraulic medium pump 53 are arranged in series. The supply of the electric motor 54, but also of a not shown control unit and of further electronic components in the fuselage tool part 49 is provided by the arrangement of a battery 55.

[0102] Furthermore, the fuselage tool part 49 has a handle region 56 for grasping the tool part housing usually with one hand. Advantageously, an operating key 57 is assigned to the handle region 56, which is arranged in an ergonomic manner.

[0103] In this embodiment, the hydraulic piston 6 is also moved due to the pressure increase against the force of the spring 18 towards the working terminal position.

[0104] Figures 12 to 16 A second embodiment of the device head 1 is shown, which differs from the above-described embodiment especially with regard to the guide of the cylindrical structure 4 and the accommodation A or the second tool holder 12 on the device head 1. The basic mode of action and the working principle and the basic structure for exerting a hydraulic action on the accommodation A generally correspond to the above-described first embodiment. Here, the accommodation A or the second tool holder 12 is also preferably of one piece and more preferably made of the same material as the piston rod 13.

[0105] Compared to the above-described embodiment, in this embodiment the cylindrical structure 4 extends only approximately from the adapter part bottom 43 to a back face 60 facing away from the end face 59 of the accommodation A in the stepped transition from the piston rod 13 to the accommodation A. Thus, in this embodiment the accommodation A or the second tool holder 12 with the second tool 5, if necessary, is bare between the end faces of the cylindrical structure 4 and the corresponding holder 2 facing towards each other, apart from the region of the support and guide of the bottom side in the region of the connecting arm 10.

[0106] As can be seen especially from the sectional views in Figure 14 and Figure 15 , the accommodation A or the second tool holder 12 can have on the bottom side, i.e. towards the connecting arm 10 of the device head 1, a recess 61 in accordance with the sectional view in Figure 14a cross section according to the application, the guide projection 61 is substantially T-shaped. In the usual operating position, as shown, the guide projection 61 can be guided in a guide groove 62 of the connecting arm 10, which is oriented in the movement direction d. Here, the T-shaped head 67 of the guide projection 61 can be arranged toward the groove bottom of the guide groove 62. In addition, the T-shaped head 67 of the guide projection can be connected to the second tool holder 12 by means of a T-shaped connecting portion 68, which is narrower than the T-shaped head in a cross section according to Figure 14

[0107] Due to the cooperation of the guide projection 61 and the guide groove 62, a rotation-proof fixing is provided, which prevents a rotation of the receiving portion A or the second tool holder 12 about the axis x, and in addition a linear guidance of the receiving portion A when it is moved in the movement direction d.

[0108] In addition, the guide groove 62 of the device head 1 can be designed, in a length l viewed in the movement direction d, partially as an undercut 63, which acts transversely to the movement direction d. This undercut 63 can be provided, for example, by oppositely arranged ribs 64, which point toward each other, and which are designed to have a distance relative to the groove bottom 69 and are suitable for being engaged in the narrowed region of the guide projection 61 between the T-shaped head 67 and the receiving portion A in a cross section according to Figure 5

[0109] According to the shown embodiment, the undercut 63 can extend in the movement direction d, for example, over approximately half of the length l of the guide groove 62, up to approximately 2 / 3 or 3 / 4 of the entire length l. It is further preferred to provide that the undercut extends, in particular, over the usual movement path of the receiving portion A, respectively over the last half of the movement path up to the last 3 / 4 of the movement path, so that a corresponding guidance and a fixing, which prevents a movement of the receiving portion A transversely to the movement direction d, is provided, in particular, in the case of critical load-bearing movements of the receiving portion A.

[0110] The undercut is thus provided, in particular, in the work terminal position.

[0111] In a starting position according to Figure 13 , which is, if necessary, a basic position, in particular, a basic position, in which the hydraulic piston 6 does not act, the guide groove 62 is preferably not provided with the ribs 64, so that there is no undercut in this region, which cooperates with the receiving portion A (see, in particular, the cross-sectional view in Figure 14 . This provides the advantage that, while providing a rotation-proof and tilt-proof fixing of the receiving portion A, for example, in the pressing or cutting process, the assembly and disassembly of the receiving portion A, which is designed in one piece with the piston rod 13, is facilitated.

[0112] Figure 16 ​​An assembly or disassembly position of the accommodation A or second tool holder 12 in one piece construction with the piston rod 13 is shown. For disassembly, the adapter part bottom 43 with its seal 42 and the piston top 26 with its seal 29 can first be removed from the hydraulic cylinder 7, then the clamping bolt 21 is exposed in order to be removed. After removal of the clamping bolt 21, the cover part 20 and the spring 18 can be removed. This is followed by the piston rod 13 being alone and free in the hydraulic cylinder 7.

[0113] The accommodation A or second tool holder 12 can then be shifted in a direction transverse to the movement direction d (see arrow e), so that the guide protrusion 61 can exit the guide groove 62. The lifting or tilting movement in the direction of the arrow e can be directly superimposed with the pulling-out direction f (substantially in the axial direction of the piston rod 13) in order to remove the accommodation A together with the piston rod 13 through the free device port M. Assembly preferably takes place in the reverse order.

[0114] As can also be seen in the illustration of Figure 12 In the case of non-use of the device head 1, i.e. when the hydraulic hose 48 is not connected, the opening in the region of the free end of the hose connection 58 can be closed by a plug 65. In addition, this plug 65 can be connected to the hose connection 58 without loss by a strap 66.

[0115] The aforementioned embodiments serve to illustrate the invention generally included in this application, which extends the prior art at least by the following combinations of features, also each independently, wherein two, more or all of these combinations of features can also be combined with one another, i.e.:

[0116] A device head, characterized in that the second tool 5 is movable between a starting position and a working end position by means of the hydraulic piston 6, which can act on a piston rod 13 which is constructed in one piece with the accommodation A for the second tool 5, and which is completely accommodatable in the cylindrical structure 4 in the starting position.

[0117] A device head, characterized in that the device head 1 also has an engagement profile 8 which is constructed integrally in one piece for angularly fixed but variable arrangement of a holding rod 9.

[0118] A device head, characterized in that the engagement profile 8 is designed laterally offset in the longitudinal cross section of the device head 1, but overlaps the cylindrical structure 4.

[0119] A device head, characterized in that the engagement profile 8 is constructed concentrically around the central through-hole 31.

[0120] A device head, characterized in that the second tool (5) is movable by means of the hydraulic piston (6) between a starting position and a working end position, the piston rod (13) has an enlarged accommodation (A) assigned to the second tool (5) transverse to the movement direction (d) of the hydraulic piston (6) compared to the piston rod (13), and the accommodation (A) is held in the working end position transverse to the movement direction (d) in an undercut (63) constructed on the device head (1).

[0121] A device head, characterized in that the accommodation (A) for the second tool (5) is constructed in one piece with the piston rod (13).

[0122] A device head, characterized in that the accommodation (A) is displaceable in the starting position transverse to the movement direction (d) for assembly and disassembly.

[0123] A device head, characterized in that the device head (1) is connected with a hydraulic hose (48) which at the other end is connected with a hydraulic unit (47) so that the device head (1) is freely movable relative to the hydraulic unit (47) which generates the hydraulic pressure.

[0124] A device head, characterized in that the device head (1) is rigidly connected with a fuselage tool part (49) in which the hydraulic unit (47) is arranged.

[0125] A device head, characterized in that the second tool (5) is movable by means of the hydraulic piston (6) between a starting position and a working end position, and the hydraulic piston (6) is completely accommodated in the starting position in the cylindrical structure (4).

[0126] A device head, characterized in that the cylindrical structure (4) has, with reference to the starting position of the hydraulic piston (6), a connection accommodation (39) for the fuselage tool part (49) or the hydraulic hose (48) outside the region in which the hydraulic piston (6) is surrounded.

[0127] A device head, characterized in that the connection accommodation (39) has a free inner diameter (a) which is greater than the diameter (b) of the cylindrical structure (4) in the region in which the cylindrical structure (4) surrounds the hydraulic piston (6) in the starting position.

[0128] A device head, characterized in that the hydraulic piston (6) is composed of the piston rod (13) and a cover part (20) arranged on the end facing away from the second tool (5).

[0129] A device head, characterized in that the piston rod (13) is designed as a hollow cylinder (23) over a partial length thereof.

[0130] A device head, characterized in that a clamping bolt 21 holds the cover part 20 through the hollow cylinder 23.

[0131] A device head, characterized in that an adapter part 40 is arranged on the connection receptacle 39 and the piston head 26 in the starting position is opposite an end face of the piston side of the adapter part 40.

[0132] All disclosed features, as such or in different combinations, are important to the invention. The disclosure of the present application therefore also contains the entire content of the related / attached priority document (copy of the prior application) and for this reason the features of the priority document are also included in the claims of the present application. The dependent claims characterize, with their features, an inventive improvement of the prior art, even if the technical features of the claims being cited are not present, in particular for the purpose of filing a divisional application on the basis of the technical features. The invention given in each claim can additionally have one or more features given in the foregoing description, in particular with reference signs and / or in the list of reference signs. The invention also relates to various designs, in which certain features mentioned in the foregoing description are not implemented, in particular if they are considered to be irrelevant for the respective purpose of use or can be replaced by other technically acting means.

[0133] List of reference signs

[0134] 1 device head

[0135] 2 corresponding holder

[0136] 3 first tool

[0137] 4 cylindrical structure

[0138] 5 second tool

[0139] 6 hydraulic piston

[0140] 7 hydraulic cylinder

[0141] 8 engagement profile

[0142] 9 holding rod

[0143] 10 connecting arm

[0144] 11 first tool holder

[0145] 12 second tool holder

[0146] 13 piston rod

[0147] 14 retaining groove

[0148] 15 retaining bolt

[0149] 16 stop

[0150] 17 annular space

[0151] 18 spring

[0152] 19 pressure plate

[0153] 20 cover member

[0154] 21 clamping bolt

[0155] 22 opening

[0156] 23 hollow cylinder

[0157] 24 threaded hole

[0158] 25 piston wall

[0159] 26 piston crown

[0160] 27 recess

[0161] 28 bolt head

[0162] 29 seal

[0163] 30 inner wall

[0164] 31 through hole

[0165] 32 recess

[0166] 33 retaining end

[0167] 34 counter-engaging formation

[0168] 35 protrusion

[0169] 36 threaded hole

[0170] 37 fixing bolt

[0171] 38 operating knob

[0172] 39 connecting receptacle

[0173] 40 adapter member

[0174] 41 adapter member wall

[0175] 42 seal

[0176] 43 adapter member base

[0177] 44 inflow opening

[0178] 45 adapter member joint

[0179] 46 threaded pin

[0180] 47 hydraulic unit

[0181] 48 hydraulic hose

[0182] 49 fuselage tool part

[0183] 50 check valve

[0184] 51 liquid reservoir

[0185] 52 pump ram

[0186] 53 hydraulic medium pump

[0187] 54 electric motor

[0188] 55 battery

[0189] 56 handle region

[0190] 57 actuation button

[0191] 58 hose connection

[0192] 59 end face

[0193] 60 back face

[0194] 61 guide protrusion

[0195] 62 guide groove

[0196] 63 undercut

[0197] 64 rib

[0198] 65 plug

[0199] 66 strap

[0200] 67 T-shaped head

[0201] 68 T-shaped connection

[0202] 69 groove bottom

[0203] b inner diameter

[0204] c direction

[0205] d movement direction

[0206] l length

[0207] e arrow

[0208] f pull-out direction

[0209] x hydraulic piston axis

[0210] y holding lever longitudinal axis

[0211] z pivot axis

[0212] A accommodation

[0213] M device port

[0214] W tool device

[0215] Alpha angle

Claims

1. A device head (1) of a hydraulically operable tool device (W) with a corresponding holder (2) which is integrally configured in one piece on the device head (1), the corresponding holder having an accommodation for a first tool (3), and the device head further having a second tool (5) which is movable towards the corresponding holder (2) by means of a hydraulic piston (6), wherein The cylindrical structure (4) associated with the hydraulic piston (6) is likewise provided in one piece integrally with the device head (1), characterized in that the device head (1) also has a mating profile (8) which is configured in one piece integrally, for angularly fixed but variable arrangement of a holding bar (9).

2. The apparatus head of claim 1, wherein, The mating profile (8) is designed laterally offset in the longitudinal cross section of the device head (1), but overlaps the cylindrical structure (4).

3. A device head according to claim 1 or 2, characterised in that, The mating profile (8) is concentrically encircling with respect to the central through-hole (31).

4. An apparatus head according to any one of the preceding claims, characterised in that, The device head (1) is rigidly connected with a machine body tool part (49).

5. An apparatus head according to claim 4, characterised in that, The hydraulic unit (47) is arranged in the machine body tool part (49).

6. An apparatus head according to any one of the preceding claims, characterised in that, The second tool (5) is movable by means of the hydraulic piston (6) between a starting position and an end-of-work position, and the hydraulic piston (6) is completely accommodated in the cylindrical structure (4) in the starting position.

7. An apparatus head according to claim 6, characterised in that, The cylindrical structure (4) has, with respect to the starting position of the hydraulic piston (6), a continuation of the movement direction (d) of the hydraulic piston (6) from the end-of-work position to the starting position, outside the region in which the hydraulic piston (6) is surrounded, a connection accommodation (39) for the machine body tool part (49) or a hydraulic hose (48).

8. An apparatus head according to claim 7, characterised in that, The connection accommodation (39) has a free inner diameter (a) which is greater than the diameter (b) of the cylindrical structure (4) in the region in which the cylindrical structure (4) surrounds the hydraulic piston (6) in the starting position.

9. An apparatus head according to any one of claims 6 to 8, wherein, The hydraulic piston (6) is composed of the piston rod (13) and a cover part (20) arranged on the end facing away from the second tool (5).

10. An apparatus head according to claim 9, characterised in that, The piston rod (13) is designed as a hollow cylinder (23) over a part of its length.

11. A head as claimed in claim 9 or 10, characterised in that, A clamping bolt (21) holds the cover part (20) with penetration through the hollow cylinder (23).

12. An apparatus head according to any one of claims 7 to 11, characterised in that, An adapter part (40) can be arranged on the connection accommodation (39), and the piston head (26) opposes an end face on the piston side of the adapter part (40) in the starting position.

13. An apparatus head according to any one of the preceding claims, characterised in that, The device head is designed in the longitudinal cross section as a C in total.

14. An apparatus head according to any one of the preceding claims, characterised in that, The device head is manufactured using a precision casting method or using a metal printing method.

15. An apparatus head according to any one of the preceding claims, characterised in that, The device head is manufactured from a titanium material.

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