Tool head of a hydraulically operable tool device

Abstract

The invention relates to a tool head (1) of a hydraulically operable tool device (W), which has a corresponding support (2) integrally and monolithically constructed on the tool head (1), the corresponding support having a receiving portion for a first tool (3), and the tool head further having a second tool (5) movable towards the corresponding support (2) by means of a hydraulic piston (6), wherein a cylindrical structure (4) associated with the hydraulic piston (6) is also provided integrally and monolithically with the tool head (1). In order to further improve a tool head of the aforementioned type in an operationally advantageous manner, it is proposed here that the tool head (1) also has an integrally and monolithically constructed engagement molding (8) for angularly fixing but variably arranging a holding rod (9).

Description

Technical Field

[0001] The present invention relates to a tool head of a hydraulically operable tool device, which has a corresponding support integrally and monolithically constructed on the tool head. The corresponding support has a receiving portion for a first tool, and the tool head further has a second tool that can be moved towards the corresponding support by a hydraulic piston. A cylindrical structure associated with the hydraulic piston is also integrally and monolithically provided with the tool head. The second tool can be moved between a starting position and a working end position by the hydraulic piston. The hydraulic piston can act on a piston rod integrally constructed with the receiving portion for the second tool. The piston rod can be completely received in the cylindrical structure in the starting position. The corresponding support is formed as a first tool support, and a second tool support can move towards the first tool support. The second tool support is integrally constructed with the piston rod extending in the cylindrical structure and made of the same material. The tool support forms a receiving portion for the second tool. Background Art

[0002] Tool heads of the above type are known in different designs. They are combined with a hydraulic drive device and are used, for example, for pressing, cutting or punching workpieces. For this purpose, corresponding first and second tools are provided in the tool head or on the hydraulic piston. For example, reference is made to the patent EP 1084798 B1 (US 6,718,870 B1).

[0003] Furthermore, it is known that the tool head is basically integrally constructed and made of the same material. Thus, the corresponding support and the cylindrical structure for directly or indirectly receiving and guiding the hydraulic cylinder are integrally and monolithically provided.

[0004] A tool head is known from document US2 968 202 A, in which the second tool support is designed with different diameters along its length but is always circular. In addition, it can only be disassembled downwards. Summary of the Invention

[0005] Based on the last-mentioned prior art, the technical problem to be solved by the present invention is to provide a tool head of the aforementioned type, in which the second tool support is advantageously designed in terms of guiding and removal.

[0006] The technical problem is solved in such a way that it is stipulated that, with reference to a cross-section transverse to the axis of the hydraulic piston, the second tool support is designed as a substantially longitudinally extending rectangle, and the longitudinally extending edges that are vertically extended in the use state are designed as longitudinally extending straight lines, while the shorter edges observed transversely thereto are respectively guided along an arcuate line, and the arcuate line has a common radius relative to the axis, and the radius dimension is adapted to the diameter dimension of the surrounding outer wall of the cylindrical structure.

[0007] Here, the working end position does not necessarily have to be the maximum achievable end position limited by the necessary stop of the hydraulic piston. Instead, the working end position can be such a movement position of the hydraulic piston in which the tool is used as specified to carry out the measures to be carried out. From this reached working end position, the hydraulic piston can, if necessary, automatically move back towards the starting position due to the opening of the valve implemented in the hydraulic system.

[0008] The receptacle for the second tool is constructed integrally with the piston rod and is more preferably constructed of the same material as the piston rod. This also provides advantages in terms of manufacturing and assembly technology.

[0009] Here, the hydraulic piston can be arranged, as is also preferably the case, not to be connected to the piston rod or alternatively to be detachably connected to the piston rod.

[0010] Since the piston rod is completely accommodated in the cylindrical structure, this is also achieved in the starting position. For example, when replacing or storing the equipment head, the piston rod is protected from direct damage from the outside.

[0011] Advantageously, the tool receptacle together with the piston rod can be removed through the equipment opening remaining between the corresponding bracket of the equipment head and the cylindrical structure.

[0012] The equipment head can also have an integrally formed engaging part for fixing the holding rod at an angle but variably arranged.

[0013] Using such a holding rod can, for example, enable the user to use the equipment head away from the body. Additionally or alternatively, using the holding rod can stabilize the equipment head in the working position. Thus, through the holding rod, operations can be achieved, for example, above the head, at least at a height of at least, for example, 1 meter or at a greater distance. Here, in particular, the equipment head and, if necessary, the hydraulic unit acting on the hydraulic cylinder are no longer directly or only held by hand, but are at least additionally held by the holding rod.

[0014] The holding rod can have a fixed length of, for example, 0.5 meters, 1 meter, 2 meters up to, for example, 3 meters. Among them, any intermediate size, for example, an intermediate size between 0.5 and 3 meters, can also be provided as the fixed length. In one possible design, the holding rod can also be designed to be adjustable in its length, for example, by means of a telescopic design, and thus, for example, have a telescopic length of 0.5 to 2 meters.

[0015] Since a meshing forming part is provided on the device head, it is beneficial for operation by means of the holding rod. This enables an angular and fixed arrangement of the holding rod relative to the longitudinal central axis of the device head, which longitudinal central axis can optionally also be the rotational axis of a hydraulic cylinder or a hydraulic piston. This angular arrangement of the holding rod is preferably changeable, and for this purpose, the form-fit provided by the meshing forming part can be temporarily released.

[0016] The integrally and monolithically constructed meshing forming part can have tooth-shaped protrusions protruding compared to the peripheral surface of the device head, optionally only one such tooth-shaped protrusion, or alternatively tooth-shaped recesses recessed compared to the aforementioned surface of the device head, optionally also only one tooth-shaped recess.

[0017] The second tool can be moved between a starting position and a working end position by means of the hydraulic piston, wherein the piston rod has a receiving part belonging to the second tool that is enlarged transversely to the movement direction of the hydraulic piston, and the receiving part is held in an undercut part constructed on the device head in the working end position transversely to the movement direction.

[0018] The receiving part that can move along the movement direction together with the piston rod is designed to hold the second tool, preferably a replaceable second tool. Here, the receiving part extends at least in a direction transversely to the movement direction beyond the outer covering surface of the piston rod, and in this regard, the enlargement of the receiving part relative to the piston rod can be produced at least on a partial section of the outer periphery of the piston rod observed with respect to the longitudinal axis of the piston rod. Thus, in addition, with respect to the longitudinal axis of the piston rod oriented in the movement direction, substantially diametrically opposed enlarged sections can form the receiving part for the second tool. The receiving part can also extend beyond the outer covering surface of the piston rod, for example, on the entire outer periphery of the piston rod.

[0019] Particularly in the working end position, and also optionally in an intermediate position between the starting position and the working end position, a relatively large force is exerted on the receiving part for the second tool. In order to prevent a possible tilting of the receiving part with the second tool here, the receiving part is held in the undercut part. The undercut part preferably acts in a direction transversely to the movement direction of the receiving part for the second tool. Thereby, an improved working result, such as a pressing or cutting result, can be advantageously achieved.

[0020] In order to construct the undercut part, the receiving part can, for example, have a raised area that is covered by a covering section of the device head in a direction transversely to the movement direction of the receiving part. Alternatively, the receiving part can also have a covering section and the device head can also have a cooperating raised area. Thus, in particular, the receiving part, and optionally also the piston rod connected to the receiving part, are guided and prevented from moving in a direction transversely to the movement direction, especially in the working end position.

[0021] Viewed in the longitudinal cross-section of the device head, in which the axis of rotation of the hydraulic piston is shown as a line, the meshing forming part is designed to be laterally offset, but overlaps with the cylindrical structure. This overlap can occur here in the radial direction relative to the axis of the hydraulic piston. Here, the overlap can also occur in the piston rod region, and additionally, if necessary, in both the starting position and the working end position of the hydraulic piston.

[0022] The cylindrical structure can correspondingly transition in the region of the meshing forming part into an arm that is reduced in thickness compared to the diameter of the cylindrical structure, and this arm is integrally and monolithically formed with the cylindrical structure. In addition, this arm can carry a corresponding bracket in an extension that is substantially in the same orientation as the axis of the hydraulic piston.

[0023] The meshing forming part can be constructed concentrically and circumferentially around a central through-hole, which is used, for example, for a clamping device to pass through, or further, for example, for a clamping bolt to pass through. If a plurality of tooth-shaped protrusions or tooth-shaped recesses of the meshing forming part are provided, these tooth-shaped protrusions and tooth-shaped recesses are preferably positioned in a generally circular or arcuate shape relative to the geometric central axis of the through-hole.

[0024] In the case where a plurality of tooth-shaped protrusions or tooth-shaped convex parts of the meshing forming part are arranged, these tooth-shaped protrusions and tooth-shaped recesses can also be circumferentially arranged relative to the geometric central axis of the through-hole so as to be evenly spaced relative to each other.

[0025] The receiving part for the second tool is constructed integrally with the piston rod and more preferably from the same material, and the hydraulic piston can preferably act on the piston rod. This also provides advantages in terms of manufacturing and assembly technology. Here, the hydraulic piston can be arranged, as is also preferably the case, not to be connected to the piston rod or alternatively to be detachably connected to the piston rod.

[0026] Due to this design, the receiving part can be inserted into the device head together with the piston rod in one-piece construction during the assembly process or removed from the device head during the disassembly process.

[0027] For this purpose, the receiving part can also be offset laterally in the starting position relative to the direction of movement for assembly and disassembly, and the starting position can preferably correspond to the basic position of the device head that is not loaded by the hydraulic piston. This can also be achieved in particular by the fact that the device head is not provided or can be canceled at least in this starting position with an undercut that is preferably provided in the working end position. In a preferred design, the undercut and the resulting guidance as well as the anti-rotation and anti-tilting fixation are only achieved when the receiving part is moved out of the starting position and towards the working end position.

[0028] The thus achieved offsetability of the receiving part in a direction transverse to the direction of movement enables the advantageous assembly or disassembly of the receiving part, which is particularly of one-piece construction with the piston rod. Due to the achieved tiltability, the receiving part can be brought into the cylindrical structure during the assembly process or removed from the cylindrical structure during the disassembly process.

[0029] In a further embodiment, the tool head can be connected to a hydraulic hose, which at the other end can be connected to a hydraulic unit so that the tool head can move freely relative to the hydraulic unit generating the hydraulic pressure. The hydraulic hose can here have such a length that it allows the tool head to move substantially freely when the hydraulic unit is preferably placed on the ground or at a height such as table height. The arrangement of the holding rod is particularly useful in this configuration. For example, this configuration allows the tool head to be used overhead and, in addition, particularly allows use at a distance from the user, for example, one to two meters or more.

[0030] Furthermore, the tool head can be rigidly connected to a body tool part in which the hydraulic unit is arranged. Such a body tool part 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 invention, also for the purpose of incorporating the features of this document into the claims of the present invention.

[0031] The body tool part can be used by the user simultaneously as a handle for guiding the tool head. When the body tool part is arranged, the arrangement of the holding rod can be dispensed with or a holding rod arranged on the tool head can be used. However, the combination of the tool head and the body tool part, which is rigid, can also be held or guided additionally, if necessary, by means of the provided holding rod.

[0032] Here, the hydraulic piston can be completely received in the cylindrical structure in the starting position. Thus, the hydraulic piston or parts of the hydraulic piston preferably do not project axially beyond the cylindrical structure and, if necessary, not beyond the hydraulic cylinder thus formed. This provides advantages, for example, in the case where the tool head is not connected to the hydraulic hose or the body tool part, and thus, for example, during the replacement or storage of the tool head. By the design according to the invention, damage to the hydraulic piston or parts of the hydraulic piston due to free projection beyond the end of the cylindrical structure is prevented.

[0033] The cylindrical structure may also have a connection receiving portion for the fuselage tool member or the hydraulic hose outside the region surrounding the hydraulic piston, with reference to the starting position of the hydraulic piston, continuing the movement direction of the hydraulic piston from the working end position to the starting position, or along the extension direction of the rotation axis of the hydraulic piston. The connection receiving portion is spaced relative to the hydraulic piston along the axial direction or the movement direction of the hydraulic piston, which is achieved both preferably in the starting position and in the working end position and at any position between these two end positions. This can achieve additional assembly-technical advantages.

[0034] The connection receiving portion may have a free inner diameter, which may be greater than the diameter of the cylindrical structure in the region where the cylindrical structure surrounds the hydraulic piston in the starting position. The cylindrical structure can simultaneously and directly form a hydraulic cylinder in the region surrounding the hydraulic piston, and accordingly has a cylinder inner surface that basically cooperates with the hydraulic piston.

[0035] The section with the connection receiving portion may more preferably also be integrally formed with the cylindrical structure in one piece. This section may have an inner diameter that may be, for example, about 1.05 to 1.3 times, further for example about 1.1 times, the inner diameter of the cylindrical structure.

[0036] In a possible design, the hydraulic piston may be composed of the piston rod and a cover member arranged at the end facing away from the second tool. The piston rod may be surrounded by a return spring, and the return spring may be supported on the cover member in one end region. In this case, the end of the spring facing away from the cover member is supported on a section of the cylindrical structure of the equipment head.

[0037] The piston rod may also be designed as a hollow cylinder over a part of its length, for example, 50% to 95% of the length, and if necessary, even over the entire length. Thus, first, a weight reduction in the region of the piston rod is achieved. Thereby, favorable stress conditions can also be achieved in the region of the tool that can be moved by the hydraulic piston.

[0038] The clamping bolt may hold the cover member in the case of passing through the hollow cylinder. Here, the clamping bolt may cooperate with a threaded hole at the end side, and the threaded hole may be formed in the piston rod or in the tool receiving portion for receiving the second tool connected to the piston rod.

[0039] It is feasible that an adapter member can be arranged on the connection receiving portion, for example, for connecting a hydraulic hose or a fuselage tool member. Different adapter members can be provided accordingly. Here, the piston top may be opposed to the piston-side end face of the adapter member in the starting position.

[0040] In a further, equally preferred design, the device head can be designed in the described longitudinal cross-section to be generally C-shaped, and in this regard, manufacturing using precision casting methods or using metal printing methods can also be provided. This enables an integrally one-piece construction. According to a possible design, for example, titanium can be used as the material for manufacturing the device head. Description of the Drawings

[0041] The present invention will be described below in conjunction with the drawings, but the drawings only show embodiments. Components that are only described in one of these embodiments and are not replaced by other different components due to the prominent features there are also described as at least possibly existing components for that other embodiment. In the drawings:

[0042] Figure 1 A first embodiment of the device head with a holding rod is schematically shown, wherein the device head is connected to the drive unit through a hydraulic hose;

[0043] Figure 2 Shows a longitudinal cross-sectional view of the device head with a holding rod and a hydraulic hose that is Figure 1 Enlarged compared to;

[0044] Figure 2a Shows a cross-sectional view according to Figure 2 The line IIa-IIa in;

[0045] Figure 3 Shows Figure 2 An enlarged view of region III in;

[0046] Figure 4 In a side view corresponding to Figure 1 The device head is shown enlarged;

[0047] Figure 5 In a side view opposite to Figure 4 The device head is shown;

[0048] Figure 6 A perspective view of the device head is shown;

[0049] Figure 7 Shows Figure 6 An enlarged view of region VII in;

[0050] Figure 8 Shows a cross-sectional view according to Figure 5 The line VIII-VIII in;

[0051] Figure 9 In a side view corresponding to Figure 4 The device head is shown, but the device head is arranged on the body tool component;

[0052] Figure 10 shows a longitudinal cross-section of the device according to Figure 9 ;

[0053] Figure 11 shows Figure 10 an enlarged view of region XI in

[0054] Figure 12 shows a view corresponding to Figure 4 but relating to a second embodiment of the equipment head;

[0055] Figure 13 shows a cross-section corresponding to Figure 3 but relating to an embodiment according to Figure 12 ;

[0056] Figure 14 is a cross-section along line XIV-XIV in Figure 13 relating to the starting position of the receiving part of the second tool;

[0057] Figure 15 shows a cross-section along line XV-XV according to Figure 13 ;

[0058] Figure 16 shows a cross-section substantially corresponding to Figure 13 but relating to the assembly or disassembly position of the receiving part. DETAILED DESCRIPTION

[0059] First, a first embodiment of the equipment head 1 of the hydraulically actuable tool device W is shown and described with reference to Figures 1 to 11 .

[0060] The equipment head 1 is preferably integrally and monolithically constructed with a corresponding bracket 2 for receiving the first tool 3, and the equipment head further has another integrally and monolithically cylindrical structure 4 in which a hydraulic piston 6 acting on the second tool 5 can be linearly moved in a directly or indirectly guided manner.

[0061] The cylindrical structure 4 can be directly formed as a hydraulic cylinder 7 in which the hydraulic piston 6 is guided.

[0062] In addition, a snap-forming part 8 is integrally provided on the equipment head with the equipment head 1 for angularly fixing but variably arranging the holding rod 9.

[0063] The integrally and monolithically constructed equipment head 1 can generally be referred to according to the side view according to Figure 4 or according to Figure 3The longitudinal cross-section is generally designed to be roughly C-shaped. In this longitudinal cross-section, the axis x of the hydraulic piston is shown as a line. One C-shaped arm forms the corresponding bracket 2, and the opposite C-shaped arm basically forms a cylindrical structure 4. These C-shaped arms are connected to each other by a connecting arm 10 (the connecting part of the C-shaped base), and the connecting arm basically extends along the orientation of the axis x of the hydraulic piston.

[0064] In the illustrated embodiment, the cylindrical structure 4 directly provides a working surface for the hydraulic piston 6 on the inner side of the wall. The cylindrical structure can be basically designed as a cylinder in the cross-section relative to the orientation transverse to the axis x on the outer side of the wall. In this cross-section, the section of the connecting arm 10 connected to the cylindrical wall of the cylindrical structure 4 can, preferably, also basically extend along the radial direction relative to the axis x, where the dimension of the wall thickness of the connecting arm 10 in the direction perpendicular to the axis x related thereto is smaller than the dimension of the outer diameter of the cylindrical structure 4. Therefore, the thickness of the connecting arm 10 related thereto can be equal to about 0.3 to 0.7 times, further about 0.5 times, of the outer diameter of the cylindrical structure 4.

[0065] The corresponding bracket 2 forms the first tool bracket 11. The first tool 3 can be removably and lockably arranged in the first tool bracket.

[0066] The second tool bracket 12 can move towards the first tool bracket 11 or the first tool 3 accommodated therein. The second tool bracket is preferably integrally formed with the piston rod 13 extending in the cylindrical structure 4 and made of the same material. The tool bracket 12 constitutes a receiving portion A for the second tool 5, and the second tool is also preferably removably held. The axial length of the piston rod 13 can be equal to about 1.3 to 2.5 times the maximum movement stroke of the hydraulic piston 6 here.

[0067] The second tool bracket 12 can be designed to be basically longitudinally extended and rectangular with reference to the cross-section transverse to the axis x according to Figure 2a In the illustrated embodiment, in the use state, according to Figure 2a The vertically extending longitudinal edges are configured as longitudinally extended straight lines, while the shorter edges observed transversely thereto are respectively guided along arcuate lines. These arcuate lines have a common radius relative to the axis x. The radius dimension is adapted to the diameter dimension of the outer cover wall around the cylindrical structure 4. In order to fix the second tool bracket 12 circumferentially, and correspondingly to prevent rotation around the axis x, the second tool bracket 12 can, as also shown, have an axially extending retaining groove 14 opening towards the outer cover wall in the region of the curved surface on the outer side of the wall. In the normal operating state, as also shown, a retaining bolt 15 can be engaged in this retaining groove, and the retaining bolt is accommodated in Figure 3extends substantially in the cylindrical structure 4 shown at the starting position until the end face 59 of the second tool support 12 facing the first tool support 11 and is guided therein. After loosening or removing the retaining bolt 15 (preferably after removing the additional clamping bolts 21, the cover member 20 and possibly the spring 18, as explained in more detail below), the second tool support 12 together with the piston rod 13 integrally formed with the tool support 12 can be led out through the free equipment opening M or corresponding assembly can be carried out through this path. The equipment opening is generated between the first tool support 11 and the second tool support 12, for example, according to Figure 3 at the starting position. For this purpose, it is necessary to rotate the tool support 12 around the axis x by preferably about 90°.

[0068] As also shown in the figure, the section of the cylindrical structure 4 that houses the second tool support is enlarged in diameter compared to the section of the cylindrical structure 4 in which the hydraulic piston 6 is guided. Therefore, the inner diameter of the section of the cylindrical structure 4 that surrounds the second tool support 12 can be approximately 1.05 to 1.2 times the inner diameter of the section that surrounds the hydraulic piston 6.

[0069] In the transition from the section of the cylindrical structure 4 that surrounds the second tool support 12 to the section that surrounds the hydraulic piston 6, a step is correspondingly formed on the inner wall of the wall. This step can also form a radially inwardly protruding and generally substantially annular stop 16. The second tool support 12 can abut against this stop 16 in the starting position.

[0070] The piston rod 13 connected to the second tool support substantially concentrically with the axis x can be designed as a hollow cylinder 23 substantially over its entire axial length according to the illustration. The outer diameter of this hollow cylinder is less than the inner diameter of the relevant section of the cylindrical structure 4, thus forming an annular space 17 that surrounds the piston rod 13. Here, the outer diameter of the piston rod 13 can be approximately 0.5 to 0.8 times the inner diameter of the section of the cylindrical structure 4 that surrounds the hydraulic piston 6.

[0071] A spring 18, such as in the form of a cylindrical compression spring, that surrounds the piston rod 13 is provided in the annular space 17. The end of this spring 18 facing the second tool support 12 is supported on the stop 16 of the equipment head 1 by a circular pressure plate 19, while the axially opposite end acts on the lower side of the cover member 20 of the piston rod 13 facing it.

[0072] Here, the cover member 20 is provided at the free end of the end side of the piston rod 13, and here preferably projects radially outwards uniformly around the outer wall of the piston rod 13. The spring 18 preferably acts on the radially formed step thus formed.

[0073] The cover part 20 can be fixed by a clamping bolt 21 oriented along the axis x, which penetrates the cover part 20 in the region of an opening 22 oriented concentrically with the axis x. Furthermore, the clamping bolt 21 penetrates the hollow cylinder 23 of the piston rod 13 over its entire length and is threadedly engaged at its end with a correspondingly positioned threaded hole 24 of the second tool support 12.

[0074] Based on the above arrangement, via the spring 18, the second tool support 12 is loaded towards a starting position as shown, for example, in Figure 3 in which the tool supports 11 and 12 or the tools 3 and 5 accommodated therein have the maximum distance relative to each other when viewed axially.

[0075] The hydraulic piston 6 is arranged to act on the end of the piston rod 13 provided with the cover part 20. For this purpose, as also shown in the figure, the hydraulic piston 6 can generally have a pot shape, which has a piston wall 25 surrounding concentrically with the axis x, and the piston wall can radially surround a partial section of the spring 18 as visible.

[0076] The piston head 26 acts with its inner face of the pot on the facing end face of the cover part 20, and in this connection, the inner surface of the piston head can also have a central recess 27, for example, for receiving the bolt head 28 of the clamping bolt 21.

[0077] Furthermore, a stepped recess can be produced in this regard, thus especially for receiving the cover part 20 and the bolt head 28 preferably over its entire axial thickness (see, for example, the illustration in Figure 11 ).

[0078] Thus, the inner surface of the piston head can 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.

[0079] In the region of the piston head 26, a seal 29 is received in a radially outwardly open circumferential annular groove for sealing the hydraulic piston 6 relative to the inner wall 30 of the hydraulic cylinder 7 formed by the cylindrical structure 4.

[0080] Referring to the longitudinal cross-section according to Figure 3 the engaging and forming part 8 for fixing the retaining rod 9 can, and preferably is also designed to be laterally offset relative to the cylindrical structure 4 in the region of the connecting arm 10, and here preferably radially overlaps the cylindrical structure 4, that is, in the projection of the engaging and forming part 8 in a direction transverse to the axis x and towards the cylindrical structure 4, the engaging and forming part 8 is substantially received in the cylindrical structure.

[0081] As also shown, the engaging forming part 8 can be constructed only on one side of the connecting arm 10. For this purpose, a through hole 31 that completely penetrates the connecting arm 10 can be provided first, and a plurality of recesses 32 can be provided in the connecting arm 10 concentrically around the through hole 31. These recesses are evenly spaced relative to each other in the circumferential direction and are preferably identically constructed to form the engaging forming part 8. According to Figure 7 the illustration in

[0082] it is possible to arrange twelve such recesses 32 evenly distributed around the through hole 31.

[0083] The holding rod 9 that can be fixed by the engaging forming part 8 has a corresponding engaging forming part 34 at the holding end 33. According to the illustrated embodiment, the corresponding engaging forming part can be composed of a plurality of protrusions 35, and the number of protrusions is adapted to the number of recesses 32 of the engaging forming part 8. These protrusions 35 can also be designed identically in terms of their cross-sectional design and depth, and these protrusions 35 can be arranged evenly in the circumferential direction and in accordance with the arrangement of the recesses 32.

[0084] By exemplarily arranging twelve recesses 32, the holding rod 9 can be fixed at an angular interval of 30 degrees relative to this embodiment. A corresponding different angle α can be enclosed between the hydraulic piston axis x and the longitudinal axis y of the holding rod 9, and the hydraulic piston axis basically coincides with the longitudinal axis of the equipment head 1.

[0085] By arranging the protrusions 35 on the holding end 33 of the holding rod 9, a threaded hole 36 can also preferably be provided at the center of the holding end 33. In the assembled position of the holding rod 9, this threaded hole 36 overlaps with the through hole 31 of the equipment head 1.

[0086] In order to determine the found orientation position of the holding rod 9 and accordingly the relevant form-fitting position between the engaging forming part 8 and the corresponding engaging forming part 34, a fixing bolt 37 can be provided. The fixing bolt penetrates the through hole 31 from the side opposite to the engaging forming part 8 and engages in the threaded hole 36 of the holding rod 9. By means of an operating handle 38 connected to the end opposite to the end that cooperates with the threaded hole 36, it is possible to clamp the holding rod 9, especially its corresponding engaging forming part 34, with the engaging forming part 8 of the equipment head 1.

[0087] The holding rod 9 can pivot around a geometric pivot axis z, which is provided by the fixing bolt 37 and extends perpendicular to the axes x and y.

[0088] The holding rod 9, which is oriented in this way and fixed to the device head 1, can also bring the device head 1 to a distant working position and / or the device head 1 can be supported by the holding rod 9, etc.

[0089] As can also be seen from the figure, the cylindrical structure 4 can extend further in the direction away from the second tool support 2 along the extension direction of the axis x beyond the hydraulic piston 6, especially the piston head 26. Correspondingly, the hydraulic piston 6 is also completely located in the cylindrical structure 4 in the starting position.

[0090] The section of the cylindrical structure 4 that protrudes beyond the piston head 26 in the starting position can form a connection receiving part 39 for the adapter part 40. Here, the free inner diameter a in the region of the connection receiving part 39 can, and is also preferably selected to be, for example, 1.05 to 1.2 times larger than the free inner diameter b in the region of the section of the cylindrical structure 4 that forms the hydraulic cylinder 7.

[0091] In addition, an internal thread can be constructed on the inner side of the wall of the connection receiving part 39 for cooperating with the external thread in the region of the adapter part wall 41 around the adapter part 40. The adapter part wall 41 can also, and is also preferably provided with a seal 42, which is embedded in a groove that is open radially outwards on the outer side of the wall, and the seal acts on the inner wall 30 of the cylindrical structure 4 or the connection receiving part 39.

[0092] The adapter part bottom 43, which is oriented transversely to the axis x, has an inflow opening 44 for the hydraulic medium reserved in the middle, and the inflow opening is correspondingly penetrated by the geometric axis x in the center. The inflow opening 44 is surrounded by a short cylindrical adapter part joint 45 on the outside or away from the hydraulic piston 6.

[0093] The surface of the adapter part bottom 43 facing away from the hydraulic piston 6 can be substantially flush with the corresponding end face of the cylindrical structure 4.

[0094] In addition, the adapter part 40 can be fixed in the use position where it is screwed into the connection receiving part 39 by a threaded pin 46 that penetrates the wall of the connection receiving part 39.

[0095] According to Figures 1 to 8 In the first application shown, the device head 1 can be operated by a separate hydraulic unit 47, and a hydraulic hose 48 is arranged between the hydraulic unit 47 and the device head 1 so that the device head 1 can move freely. It can be seen that one end of the hydraulic hose 48 is connected to the hydraulic unit 47 and the other end is sealedly connected to the device head 1 through a hose joint 58, and this sealing is achieved through the adapter part 40.

[0096] The corresponding hydraulic pressure is generated by the hydraulic unit 47.

[0097] To move the hydraulic piston 6 and thus the tool support 12 carrying the second tool 5 towards its working end position, which is schematically shown in dash-dot type in Figure 3 the hydraulic fluid is pumped into the space generated between the adapter part 40 and the piston head 26, so that due to the increase in hydraulic pressure generated during this process, the hydraulic piston is moved in the direction c against the restoring force of the spring 18.

[0098] When the working end position is reached, the pressure reduction can be achieved automatically or by user intervention, but if necessary, the pressure reduction can also be achieved before reaching the working end position, so that an automatic reset of the hydraulic piston 6 and thus the second tool support 12 in the starting position in the movement direction d can be achieved.

[0099] Alternatively, the equipment head 1 can be connected to the body tool part 49, as shown additionally in Figures 9 to 11 The adapter part 40 can also be used to connect the equipment head to the body tool part, optionally using the same adapter part 40 that is also used to connect the hydraulic hose 48, but alternatively using an adapter part 40 that is specifically for the body tool part 49.

[0100] The body tool part 49 can generally be designed as a substantially longitudinally extending rod shape, which in principle supports the one-handed operation of the equipment. Additional support can be provided in the area of the equipment head 1 by the possible arrangement of the holding rod 9. The tool equipment W thus composed of the body tool part 49 and the equipment head 1 can also be used alone without the holding rod 9, which is why the holding rod 9 is only optionally shown in dash-dot in the illustration of the second embodiment. The tool-free detachable arrangement of the holding rod 9 achieved by the fixing bolt 37 provides this optional arrangement.

[0101] A rod-shaped body tool part 49 is known from the above-cited patent EP 1519813 B1. In particular with regard to the function of the body tool part 49, the content of this patent is hereby fully incorporated into the disclosure of the present invention, also for the purpose of including the features of this patent in the claims of the present invention.

[0102] Referring to Figure 10 the illustration in, the design of the body tool part 49 can be seen in connection with the technical solutions described in the above-mentioned patent EP 1519813 B1, for example with regard to the check valve 50, the liquid storage tank 51 and the pump push rod 52. Here, it can generally also be seen that the hydraulic medium pump 53 and the electric motor 54 for the hydraulic medium pump 53 are arranged in series. In particular, the power supply for the electric motor 54, as well as the power supply for a control unit not shown and other electronic components in the body tool part 49, is provided by the arrangement of the storage battery 55.

[0103] In addition, the body tool part 49 has a handle area 56 for grasping the tool part housing usually with one hand. The operating buttons 57 assigned to the handle area 56 are advantageously arranged in an ergonomic manner.

[0104] In this embodiment, due to the pressure increase as well, the hydraulic piston 6 is moved towards the working end position against the force of the spring 18.

[0105] Figures 12 to 16 A second embodiment of the device head 1 is shown, which differs from the above-described embodiment especially in the cylindrical structure 4 and the guidance of the receiving part A or the second tool carrier 12 on the device head 1. The basic mode of action and working principle as well as the basic structure for exerting a hydraulic action on the receiving part A are largely in accordance with the above-described first embodiment. Here, the receiving part A or the second tool carrier 12 is also preferably of one-piece construction and more preferably made of the same material as the piston rod 13.

[0106] Compared with the above-described embodiment, in this embodiment, the cylindrical structure 4 extends only approximately from the bottom 43 of the adapter part to the back 60 of the end face 59 facing away from the receiving part A, which back is in the stepped transition from the piston rod 13 to the receiving part A. Thus, in this embodiment, the receiving part A or the second tool carrier 12 (optionally with the second tool 5) is bare between the facing end faces of the cylindrical structure 4 and the corresponding carrier 2 except for the support and guidance areas on the bottom side in the area of the connecting arm 10.

[0107] As can be seen especially from Figure 14 and Figure 15 in the cross-sectional views, the receiving part A or the second tool carrier 12 can have a guide projection 61 which is substantially T-shaped in cross-section according to Figure 14 on the bottom side, i.e. facing the connecting arm 10 of the device head 1. In the normal operating position, as also shown in the figures, 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 facing 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 carrier 12 by means of a T-shaped connection 68 which is narrowed compared to the T-shaped head in the cross-section according to Figure 14 .

[0108] Due to the cooperation of the guide projection 61 and the guide groove 62, firstly, anti-rotation fixation preventing the receiving part A or the second tool carrier 12 from rotating about the axis x is provided, and in addition, linear guidance of the receiving part is provided when the receiving part A is moved in the movement direction d.

[0109] Furthermore, the guide groove 62 of the device head 1 can be partially designed as an undercut 63 acting transversely to the movement direction d over a length l observed in the movement direction d. The undercut 63 can be provided, for example, by ribs 64 arranged opposite one another in a cross-section according to Figure 5 and pointing towards one another, which ribs are designed to have a distance from the groove bottom 69 and are suitable for engaging in the narrowing region of the guide projection 61 between the T-shaped head 67 and the receiving part A.

[0110] According to the illustrated embodiment, the undercut 63 can extend, for example, over approximately half of the length l of the guide groove 62 up to approximately two-thirds or three-quarters of the entire length l in the movement direction d. It is further preferably provided that the undercut extends in particular along the normal movement path of the receiving part A, correspondingly in the second half of the movement path up to the last three-quarters of the movement path, so as to provide in particular corresponding guidance and fixation against movement of the receiving part A transversely to the movement direction d in critical load-bearing movement cases of the receiving part A.

[0111] The undercut is thus provided in particular in the working end position.

[0112] In the starting position according to Figure 13 , which starting position is, if necessary, a basic position, in particular a basic position not acted upon by the hydraulic piston 6, the guide groove 62 is preferably not provided with ribs 64, so that there is no undercut cooperating with the receiving part A in this region (in particular with reference to the cross-sectional view in Figure 14 ). This provides the advantage that while providing anti-rotation and anti-tilting fixation of the receiving part A, for example, during a pressing or cutting process, it facilitates the assembly and disassembly of the receiving part A constructed integrally with the piston rod 13.

[0113] Figure 16 The assembly or disassembly position of the receiving part A constructed integrally with the piston rod 13 or the second tool support 12 is shown. For disassembly, first the adapter part bottom 43 together with its seal 42 and the piston head 26 together with its seal 29 can be removed from the hydraulic cylinder 7, and then the clamping bolts 21 are exposed for removal. After removing the clamping bolts 21, the cover part 20 and the spring 18 can be removed. After that, the piston rod 13 is located alone and freely in the hydraulic cylinder 7.

[0114] Thereafter, the receiving part A or the second tool support 12 can be offset in a direction transverse to the movement direction d (see arrow e), so that the guide projection 61 can be removed from the guide groove 62. The lifting or tilting movement in the direction of arrow e can be directly superimposed on the pulling-out direction f (essentially along the axial direction of the piston rod 13) in order to remove the receiving part A together with the piston rod 13 through the free device opening M. Assembly is preferably carried out in the reverse order.

[0115] As can also be seen, in particular from the illustration of Figure 12 when the device head 1 is not in use, 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. Additionally, the plug 65 can be non-lostingly connected to the hose connection 58 by a strap 66.

[0116] List of reference numerals

[0117] 1 Device head

[0118] 2 Corresponding bracket

[0119] 3 First tool

[0120] 4 Cylindrical structure

[0121] 5 Second tool

[0122] 6 Hydraulic piston

[0123] 7 Hydraulic cylinder

[0124] 8 Engaging forming part

[0125] 9 Holding rod

[0126] 10 Connecting arm

[0127] 11 First tool bracket

[0128] 12 Second tool bracket

[0129] 13 Piston rod

[0130] 14 Holding groove

[0131] 15 Holding bolt

[0132] 16 Stop

[0133] 17 Annular space

[0134] 18 Spring

[0135] 19 Pressure plate

[0136] 20 Cover part

[0137] 21 Clamping bolt

[0138] 22 Opening

[0139] 23 Hollow cylinder

[0140] 24 Threaded hole

[0141] 25 Piston wall

[0142] 26 Piston top

[0143] 27 Recess

[0144] 28 Bolt head

[0145] 29 Seal

[0146] 30 Inner wall

[0147] 31 Through hole

[0148] 32 Recess

[0149] 33 Retaining end

[0150] 34 Corresponding meshing forming part

[0151] 35 Protrusion

[0152] 36 Threaded hole

[0153] 37 Fixing bolt

[0154] 38 Operating grip

[0155] 39 Connecting receiving part

[0156] 40 Adapter part

[0157] 41 Adapter part wall

[0158] 42 Seal

[0159] 43 Adapter part bottom

[0160] 44 Inflow opening

[0161] 45 Adapter part joint

[0162] 46 Threaded pin

[0163] 47 Hydraulic unit

[0164] 48 Hydraulic hose

[0165] 49 Body tool part

[0166] 50 Check valve

[0167] 51 Liquid storage tank

[0168] 52 Pump push rod

[0169] 53 Hydraulic medium pump

[0170] 54 Motor

[0171] 55 Battery

[0172] 56 Handle area

[0173] 57 Manipulating button

[0174] 58 Hose joint

[0175] 59 end face

[0176] 60 back face

[0177] 61 guiding projection

[0178] 62 guiding groove

[0179] 63 undercut portion

[0180] 64 rib

[0181] 65 plug

[0182] 66 band

[0183] 67 T-shaped head

[0184] 68 T-shaped connecting portion

[0185] 69 bottom of groove

[0186] b inner diameter

[0187] c direction

[0188] d direction of movement

[0189] l length

[0190] e arrow

[0191] f pulling-out direction

[0192] x hydraulic piston axis

[0193] y longitudinal axis of holding rod

[0194] z pivot axis

[0195] A receiving portion

[0196] M equipment port

[0197] W tool equipment

[0198] α angle

Claims

1. The equipment head (1) of a hydraulically operable tool device (W), which has a corresponding support (2) integrally and monolithically constructed on the equipment head (1), the corresponding support having a receiving portion for a first tool (3), and the equipment head further having a second tool (5) movable towards the corresponding support (2) by a hydraulic piston (6), wherein, The cylindrical structure (4) associated with the hydraulic piston (6) is likewise provided integrally and monolithically with the device head (1), and wherein the second tool (5) is movable by means of the hydraulic piston (6) between a starting position and a working end position, wherein the hydraulic piston (6) can act on a piston rod (13) which is constructed integrally with the receiving part (A) for the second tool (5), and the piston rod (13) can be completely received in the cylindrical structure (4) in the starting position, and wherein the corresponding support is formed as a first tool support (11), and a second tool support (12) can be moved towards the first tool support (11), the second tool support being constructed integrally with the piston rod (13) extending in the cylindrical structure (4) and consisting of the same material, wherein the tool support (12) forms the receiving part (A) for the second tool (5), characterized in that, with reference to a cross-section transverse to the axis (x) of the hydraulic piston, the second tool support (12) is designed as a substantially longitudinally extending rectangle, the longitudinally extending edges which are perpendicular in the use state being designed as longitudinally extending straight lines, while the shorter edges, observed transversely thereto, are each guided along an arcuate line, and the arcuate line has a common radius with respect to the axis (x), and the radius dimension is adapted to the diameter dimension of the surrounding outer wall of the cylindrical structure (4).

2. The device head according to claim 1, characterized in that, The device head (1) also has an integrally and monolithically constructed engaging molding (8) for angularly fixing but variably arranging a holding rod (9).

3. The device head according to claim 2, characterized in that, The engaging molding (8) is designed to be laterally offset in the longitudinal cross-section of the device head (1) but to overlap the cylindrical structure (4).

4. The equipment head according to any one of claims 2 or 3, characterized in that The engaging molding (8) is constructed concentrically around a central through-hole (31).

5. The device head according to claim 1, characterized in that, The piston rod (13) has a receiving part (A) for the second tool (5) which is enlarged transversely to the movement direction (d) of the hydraulic piston (6) compared to the piston rod (13), and the receiving part (A) is held in an undercut (63) constructed on the device head (1) transversely to the movement direction (d) in the working end position.

6. The device head according to claim 1, characterized in that, The second tool is removably held.

7. The device head according to claim 1, characterized in that, The receiving part (A) can be offset transversely to the movement direction (d) in the starting position for assembly and disassembly.

8. The device head according to claim 1, characterized in that, The device head (1) is connected to a hydraulic hose (48), and the other end of the hydraulic hose (48) is connected to a hydraulic unit (47) so that the device head (1) can move freely relative to the hydraulic unit (47) generating hydraulic pressure.

9. The device head according to claim 1, wherein The device head (1) is rigidly connected to a machine body tool part (49).

10. The device head according to claim 9, wherein, A hydraulic unit (47) is arranged in the machine body tool part (49).

11. The device head according to claim 1, characterized in that, The second tool (5) can be moved by means of the hydraulic piston (6) between a starting position and a working end position, and the hydraulic piston (6) is completely received in the cylindrical structure (4) in the starting position.

12. The device head according to claim 1, characterized in that, The cylindrical structure (4) has a connection receiving portion (39) for a fuselage tool part (49) or a hydraulic hose (48) outside the region surrounding the hydraulic piston (6), with reference to the starting position of the hydraulic piston (6) and continuing the movement direction (d) of the hydraulic piston (6) from the working end position to the starting position.

13. The device head according to claim 12, characterized in that, The connection receiving portion (39) has a free inner diameter (a) that is greater than the diameter (b) of the cylindrical structure (4) in the region where the cylindrical structure (4) surrounds the hydraulic piston (6) in the starting position.

14. The device head according to claim 1, characterized in that, The hydraulic piston (6) is composed of the piston rod (13) and a cover member (20) arranged at the end facing away from the second tool (5).

15. The device head according to claim 14, characterized in that, The piston rod (13) is designed as a hollow cylinder (23) over a part of its length.

16. The device head according to claim 15, wherein The clamping bolt (21) holds the cover member (20) in the case of passing through the hollow cylinder (23).

17. The device head according to claim 12, wherein, An adapter part (40) can be arranged on the connection receiving portion (39), and the piston head (26) is opposed to the piston-side end face of the adapter part (40) in the starting position.

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