HYDRAULICALLY ACTIVATED CUTTING TOOL

Abstract

A hydraulically activated cutting tool with first and second pivoting jaws that can pivot around a shared pivot axis is provided. A blade is formed on the first pivoting jaw and a stop is formed on the second pivoting jaw. The blade has a cutting edge that runs in the direction of the pivot axis. A gripping section is formed on the second pivoting jaw and protrudes over a stop surface of the stop in the direction toward the first pivoting jaw. A method for separating an H-tap crimped connection of two cables with a cutting tool is also provided.

Claims

1. A hydraulically activated cutting tool comprising: first and second pivoting jaws pivotable around a shared pivot axis which extends in a direction, the jaws being pivotable around the pivot axis in a pivoting direction; a blade formed on the first pivoting jaw, the blade having a cutting edge that extends in the direction of the pivot axis; a stop is formed on the second pivoting jaw, the stop having a stop surface; a gripping section formed on the second pivoting jaw and which protrudes over the stop surface a direction toward the first pivoting jaw.

2. The cutting tool according to claim 1, wherein the gripping section forms a front peripheral edge (31) in the pivoting direction, which, as viewed in the direction of the pivot axis, is arranged to a side of the cutting edge.

3. The cutting tool according to claim 1, wherein two gripping sections are formed, which are each arranged at one end of the stop surface as viewed in the direction of the pivot axis.

4. The cutting tool according to claim 3, wherein one or both gripping sections are pivotably arranged.

5. The cutting tool according to claim 3, wherein one or both gripping sections can be fixedly latched into at least one pivoting position.

6. A method configured to separate a crimped connection, which connects two strand-shaped cables in the form of an H-tap crimped connection, with a cutting tool comprising: providing a hydraulically activated cutting tool including first and second pivoting jaws pivotable around a shared pivot axis which extends in a direction, the jaws being pivotable around the pivot axis in a pivoting direction, a blade formed on the first pivoting jaw, the blade having a cutting edge that extends in the direction of the pivot axis, a stop is formed on the second pivoting jaw, the stop having a stop surface, a gripping section formed on the second pivoting jaw and which protrudes over the stop surface a direction toward the first pivoting jaw; overlapping the gripping section over sections of the strand-shaped cables that extend in the a longitudinal direction of the strand-shaped cables before and/or after the crimped connection, wherein the gripping section abuts against one of the strand-shaped cable; cutting through the crimped connection with the blade such that one of the strand-shaped part cables can be removed.

7. (canceled)

8. The cutting tool according to claim 2, wherein two gripping sections are formed, which are each arranged at one end of the stop surface as viewed in the direction of the pivot axis.

9. The cutting tool according to claim 8, wherein one or both gripping sections are pivotably arranged.

10. The cutting tool according to claim 8, wherein one or both gripping sections can be fixedly latched into at least one pivoting position.

11. The cutting tool according to claim 1, wherein the gripping section is pivotably arranged.

12. The cutting tool according to claim 1, wherein the gripping section can be fixedly latched into at least one pivoting position.

13. The cutting tool according to claim 2, wherein the gripping section is pivotably arranged.

14. The cutting tool according to claim 2, wherein the gripping section can be fixedly latched into at least one pivoting position.

15. The cutting tool according to claim 4, wherein both gripping sections can be fixedly latched into at least one pivoting position.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The invention will be described in more detail below based on the attached drawing, which only shows an exemplary embodiment. Shown on:

[0022] FIG. 1 is a perspective view of a hydraulically activated cutting tool;

[0023] FIG. 2 is a side view thereof;

[0024] FIG. 3 is a top view of the cutting tool;

[0025] FIG. 4 is the front view according to arrow IV on FIG. 3;

[0026] FIG. 5 is the section along line V-V on FIG. 4, relating to an open position of the cutting jaws with the H-tap captured in the cutting mouth by the cutting tool;

[0027] FIG. 6 is the perspective view thereof;

[0028] FIG. 7 is the view according to arrow VII on FIG. 6;

[0029] FIG. 8 is a view corresponding to FIG. 5 relating to the closed position of the cutting jaws;

[0030] FIG. 9 is the perspective view thereof;

[0031] FIG. 10 is a schematic view of the cutting line through an H-tap;

[0032] FIG. 11 is a perspective view according to FIG. 6, but relating to a situation with a disengaged gripping section;

[0033] FIG. 12 is an exploded perspective view of the pivoting jaws with two gripping sections.

DESCRIPTION OF THE EMBODIMENTS

[0034] Initially shown and described in relation to the illustration on FIG. 1 is a hydraulically activatable, in particular electro-hydraulically activatable, cutting tool 1 in a rod-like configuration.

[0035] The cutting tool 1 initially and essentially has a drive unit part 2, which can simultaneously comprise a gripping area 3. Such a drive unit part 2 is known from WO 2003/084 719 A2 (U.S. Pat. No. 7,254,982 B2), for example. The content of this WO publication or US publication is hereby included in the disclosure of the present invention in its entirety, including for the purpose of also incorporating features of this WO publication or US publication into the claims of the present invention.

[0036] A working head 4 adjoins the drive unit part 2 toward a free end of the working device. It can be replaceably mounted on the drive unit part 2, preferably by a separation in the area of a hydraulic cylinder. As also preferred, the working head 4 can further be mounted in a freely rotatable manner around a working head longitudinal axis x relative to the drive unit part 2 or the respective receptacle for the working head 4.

[0037] An accumulator 5 is set up to supply electrical power in particular to an electric motor that drives the hydraulic fluid pump, but additionally to a control unit (not shown) and other electrical components in the cutting tool 1.

[0038] The gripping area 3 can be designed for conventionally grasping the cutting tool 1 with a hand. An ergonomically beneficial activating key 6 allocated to the gripping area 3 is provided.

[0039] Two pivoting jaws 7 and 8 that can be pivoted toward and away from each other are provided in the working head 4. The latter can be pivoted around a shared geometric pivot axis y, wherein this pivot axis y is transvers to the working head longitudinal axis x.

[0040] The two pivoting jaws 7 and 8 comprise a blade 10 or a stop 11 on one side of a bearing eye 9, and a respective acting surface 13 in the form of a curved path on a jaw leg 12 on the other side of the bearing eye 9.

[0041] The acting surfaces 13 of both pivoting jaws 7 and 8 are arranged facing each other.

[0042] The bearing eyes 9 of both pivoting jaws 7 and 8 are aligned coaxially to each other, and in the assembled state are penetrated by a bolt 14, for example a locking bolt. This bolt 14 is mounted in location holes of a drive head-side receiving neck 15 on either side of the pivoting jaws 7 and 8.

[0043] The receiving neck 15 has a conventional fork-shaped design, and has a bolt receptacle that extends transverse to the longitudinal extension of the receiving neck 15 and penetrates the fork leg, preferably in the form of a through bore in which the bolt 14 is mounted.

[0044] The acting surfaces 13 of the pivoting jaws 7 and 8 protrude into the area between the fork legs of the receiving neck 15, and are exposed to rollers 16 of the drive unit part that can be preferably hydraulically displaced in the direction toward the acting surfaces 13 during a pressing process, which causes the pivoting jaws 7 and 8 to spread in the area of the curved path or acting surfaces 13, and thus the blade 10 and stop 11 of the pivoting jaws 7 and 8 to be pivotably displaced in a direction toward each other.

[0045] A hydraulic piston can be provided in the working head 4 so as to pivotably displace the pivoting jaws 7 and 8 in a cutting direction. The latter can be displaced along the axis x in a hydraulic cylinder against the force of a restoring spring. The continuous surface of each roller 16 forms an interacting surface, via which the piston can indirectly act on the acting surfaces 13.

[0046] When the activating key 6 is correspondingly activated during operation of the cutting tool 1, for example by way of a pumping plunger, hydraulic fluid is pumped into the hydraulic cylinder via a hydraulic line, so as to correspondingly act on the front piston surface facing the hydraulic fluid.

[0047] The hydraulic piston displaced opposite the force of the restoring spring through exposure to a hydraulic fluid can move a carrier for the roller 16 being exposed to a piston rod 17 linearly along the longitudinal axis x, wherein the pivoting jaws 7 and 8 are displaced toward each other in the direction of a closed position as the displacement path of the rollers 16 increases proceeding from a base position according to FIG. 5 as the result of a force-transmitting interaction between rollers 16 and the curved path-like acting surfaces 13.

[0048] The blade 10 of the one pivoting jaw 7 has a cutting edge 18. The latter runs in the direction of the pivot axis y, correspondingly preferably parallel to the latter.

[0049] The cutting edge 18 can be formed at the outer end of the pivoting jaw 7, and inwardly, i.e., in the direction to the pivot axis y, captured from behind by a recess 19 that has a pocketlike longitudinal section according to FIG. 5 and opens in the direction toward the cutting mouth M.

[0050] This type of pocket-like recess 19 can also have the pivoting jaw 8 having the stop 11. The recesses 19 of both pivoting jaws 7 and 8 face each other with their openings, and can essentially thereby border the cutting mouth M.

[0051] The stop 11 can essentially be formed by a stop surface 20, which can be preferably centrally exposed to the cutting edge 18 in a closed position of the pivoting jaws, further in a longitudinal sectional view according to FIG. 8. At the very least, the cutting edge 18 is directed toward the stop surface 20 in the closed position of the pivoting jaws.

[0052] The blade 10 or its cutting edge 18 correspondingly moves around the pivot axis y along a geometric circular line L, wherein this circular line L penetrates the stop surface 20 beyond a possible stop position (see FIG. 10).

[0053] The stop surface 20 or the stop 11 and the blade 10 or its cutting edge 18 can have at least approximately the same extension lengths as viewed in the direction of the pivot axis y (see FIG. 4).

[0054] As is also preferred, this cutting edge length or stop length can correspond to a corresponding degree of extension of an H-tap 21 to be separated using the cutting tool 1.

[0055] Such an H-tap 21 is used for crimping together in particular two cables 22 and 23. Such a crimped connection can preferably only be undone by destroying the H-tap 21. The cutting tool 1 is preferably used for this purpose.

[0056] The width of an H-tap 21 in the direction of extension of the cables 22 and 23 running essentially parallel to each other can correspond to the prescribed degree of extension of the cutting edge 18 or the stop 11.

[0057] With respect to a front view according to FIG. 4, a gripping section 24 can be arranged to the side of the stop 11. In the exemplary embodiment shown, gripping sections 24 and 25 are provided on either side of the stop, and each have peripheral edges 31 on their free ends.

[0058] The gripping section 24, 25 can be pivotably mounted to the pivoting jaw 8 to the side of the stop 11. As is also preferred, the respective pivot axis z can run aligned with the pivot axis y, wherein the pivot axis z of the one gripping section 24 can further concurrently form the geometric pivot axis of the additional gripping section 25 in an axial elongation.

[0059] Each gripping section 24 and 25 preferably has two pivoting positions that can be fixedly latched. These two pivoting positions can be offset relative to each other by 180 degrees in relation to the pivot axis z.

[0060] To this end, each gripping section 24, 25, as schematically denoted on FIG. 12, can have a latching pin 26, which can be introduced into a corresponding latching recess 27 or 28 so as to fixedly latch the gripping section 24, 25.

[0061] For unlatching purposes, the gripping section 24 or 25 can be displaced along its pivot axis z against the restoring force of a spring 29 along the retaining pin 30 that forms the axial body, and then can be pivoted into the other pivoting position if needed, after which the latched position can be secured in this position by introducing the latching pin 26 into the other latching recess.

[0062] One of the gripping sections 24, 25 or even both gripping sections 24, 25 can thus be moved into a pivoting position, in which the latching pin 26 rests in the latching recess 28, and the respective gripping section protrudes over the stop surface 20 of the stop 11 with its peripheral edge 31 in the direction toward the opposing pivoting jaw 7 or the opposing blade 10. The gripping section 24 or 25 protrudes over the stop surface 20 like a fang, wherein, in an open position of the pivoting jaw as shown on FIG. 5 with reference to a projection in a plane transverse to the longitudinal axis y, the free end with the peripheral edge 31 of each gripping section 24, 25 can be spaced a distance apart from the facing cutting edge 18 viewed in the pivoting direction. This distance can correspond to a thickness of the latter viewed perpendicular to the widthwise extension of the H-tap 21, or exceed this thickness.

[0063] In process of cutting open an H-tap 21, both gripping sections 24 and 25 fixedly latched in the overlap position overlap the protruding cable sections of the cable 22 to be removed from the H-tap 21 to the side of the H-tap 21 (see FIG. 6). As a result, the H-tap 21 is initially guided on either side. In addition, pulling by means of the cutting tool 1 in a pulling direction r roughly along the longitudinal axis x, causes the H-tap with the overlapped cable 22 to be drawn into the interstice that arises between the gripping sections 24 and 25 and the stop surface 20, so that this results in a defined stop position of the H-tap 21.

[0064] The cable 22 to be removed from the H-tap 21 correspondingly extends inside of the cutting mouth M.

[0065] As evident from the schematic view on FIG. 10, the H-tap 21 that was brought into the correct cutting position in particular by pulling is penetrated essentially along the circular line L by the cutting edge 18 of the blade 10, thereby exposing in particular the cable 22 to be removed, wherein an approximate tangential section that at least partially arises can come about with reference to the cable cross section according to FIG. 10. The cutting edge 18 is preferably guided by the outer cable surface along the circular line L, if necessary while peeling the tap material from the cable 22. A separation of the H-tap 21 is essentially achieved in the area between the cables 22 and 23.

[0066] As evident from the view on FIG. 11, a gripping section 24 or 25 can be pivoted back out of the overlap position and there be fixedly latched. For example, this can happen in H-taps 21 whose width as viewed in the direction of extension of the cutting edge 18 is greater than the cutting edge length or the length of the stop surface 20, which can essentially correspond to the inner clearance of the gripping sections 24 and 25 in the direction of extension of the pivot axis z.

[0067] In such an arrangement, the gripping section 24 or 25 might thus only overlap the cable 22 on one side, and this single gripping section might produce the tensile load on the H-tap 21 for bringing the latter into the proper cutting position.

[0068] The above statements serve to describe the inventions encompassed by the application as a whole, which even independently further develop the prior art at least with the following material combinations, wherein two, several or all of these feature combinations can also be combined, specifically:

[0069] A hydraulically activated cutting tool 1, characterized in that the blade 10 has a cutting edge 18 that runs in the direction of the pivot axis y, and that a gripping section 24, 25 is provided that is formed on the pivoting jaw 8 having the stop 11 and protrudes over a stop surface 20 of the stop 11 in the direction toward the opposing pivoting jaw 7.

[0070] A cutting tool, characterized in that the gripping section 24, 25 forms a front peripheral edge 31 in the pivoting direction, which, as viewed in the direction of the pivot axis y, is arranged to the side of the cutting edge 18.

[0071] A cutting tool, characterized in that two gripping sections 24, 25 are formed, which are each arranged at one end of the stop surface 20 as viewed in the direction of the pivot axis y.

[0072] A cutting tool, characterized in that one or both gripping sections 24, 25 are pivotably arranged.

[0073] A cutting tool, characterized in that one or both gripping sections 24, 25 can be fixedly latched in at least one pivoting position.

[0074] A method for separating an H-tap crimped connection of two cables 22, 23 with a cutting tool (1) according to one of claims 1 to 5, wherein the gripping section 24, 25 is designed to overlap a cable section that extends in the longitudinal direction of the cable 22 before and/or after the H-tap 21, and that, given a gripping section 24, 25 abutting against the cable section, the blade 10 cuts through the H-tap 21 in such a way that the cable 22 can be removed.

[0075] A cutting tool or a method, characterized by one or several of the characterizing features of one of the preceding claims.

[0076] All disclosed features (whether taken separately or in combination with each other) are essential to the invention. The disclosure of the application hereby also incorporates the disclosure content of the accompanying/attached priority documents (copy of prior application) in its entirety, also for the purpose of including features of these documents in the claims of the present application. Even without the features of a referenced claim, the subclaims with their features describe independent inventive further developments of prior art, in particular for generating partial applications based on these claims. The invention indicated in each claim can additionally have one or several of the features in the above specification, in particular those provided with reference numbers and/or indicated in the reference list. The invention also relates to embodiments in which individual features mentioned in the above specification have not been realized, in particular to the extent that they are obviously unnecessary for the respective intended use, or can be replaced by other technically equivalent means.

TABLE-US-00001 Reference List 1 Cutting tool 2 Drive unit part 3 Gripping area 4 Working head 5 Accumulator 6 Activating key 7 Pivoting jaw 8 Pivoting jaw 9 Bearing eye 10 Blade 11 Stop 12 Jaw leg 13 Acting surface 14 Bolt 15 Receiving neck 16 Roller 17 Piston rod 18 Cutting edge 19 Recess 20 Stop surface 21 H-tap 22 Cable 23 Cable 24 Gripping section 25 Gripping section 26 Latching pin 27 Latching recess 28 Latching recess 29 Spring 30 Retaining pin 31 Peripheral edge r Pulling direction x Longitudinal axis y Pivot axis z Pivot axis L Circular line M Cutting mouth