Tong-like cutting tool

Abstract

The present invention relates to a clamp-like cutting tool (1) having two tool arms (2 and 3) that cross on a hinge pin (4) and pivot relative to each other in a pivot plane (E) about a rotation axis (x), wherein the tool arms (2, 3) form a handle section (5, 6) on one side of the rotation axis (x) and a jaw (9) on the other side, wherein the working surface of the jaw (9) is also configured as a cutting edge (10, 11) that, when moving toward a closed position of the cutting tool (1), first forms an overlapping position in a closed region (S) at least radially outward to reach a first closed position, wherein the cutting edge (10, 11) also has a free length (l) cut off in the central plane (M) in the direction toward the rotation axis (x) with reference to the pivot plane (E) and extending through the rotation axis (x) and the closed region (S) in the case that the overlapping position is formed only in the closed region (S). To improve the cutting tool (1) of the aforementioned type, it is proposed that, in the free length (l), with the overlapping position formed only in the closed area (S), a maximum opening width (b) be formed between the cutting blades (10, 11) in a direction transverse to the central plane (M) on the intermediate length (z) intercepted on the central plane (M), and the maximum opening width (b) is one-third or more of the total length (g) of the cutting blades (10, 11).

Description

Technical Field

[0001] The present invention relates first to a clamp-like cutting tool having two tool arms pivotable relative to each other about a rotation axis along a pivot plane, wherein the tool arms form a shank section on one side of the rotation axis and a jaw on the other side, wherein the working surface of the jaw is also configured as a cutting edge, wherein, as the cutting edge moves toward a closed position of the cutting tool, the cutting edge first reaches an overlapping position or overlaps in the closed region radially outside the remaining open region (viewed from the rotation axis), reaching a first closed position, wherein, in this position, a plurality of opposing cutting regions constructed on the working surface and each having its own curved profile, forming the open region, are radially adjacent to each other, and with reference to a central plane perpendicular to the pivot plane and extending through the rotation axis and the closed region, the cutting edge also has a free length cut off in the central plane in the first closed position from the closed region toward the rotation axis.

[0002] The present invention also relates to a clamp-like cutting tool having two tool arms pivotable relative to each other in a pivot plane about a rotation axis, wherein the tool arms form a handle section on one side of the rotation axis and a jaw on the other side, wherein the working surface of the jaw is further configured as a cutting edge, the cutting edge reaching an overlapping position in the closed region radially outside the remaining open region when moving toward a closed position of the cutting tool, reaching a first closed position, wherein, with reference to a central plane perpendicular to the pivot plane passing through the rotation axis and extending from the closed region, the cutting edge also has a free length (or clearance length) cut off in the central plane in the first closed position from the closed region toward the rotation axis, wherein the two cutting edges also have a plurality of concave cutting regions separated from each other along the free length, and wherein the cutting regions have a maximum depth with reference to a vertical line perpendicular to an imaginary straight line closing the cutting regions, and the imaginary straight line is arranged on a dividing portion that separates the observed cutting region from the adjacent cutting region and ends in a pointed shape.

[0003] Furthermore, the present invention relates to a clamp-like cutting tool having two tool arms pivotally relative to each other about a rotation axis along a pivot plane, wherein the tool arms form a shank section on one side of the rotation axis and a jaw on the other side, wherein the working surface of the jaw is also configured as a cutting edge, the cutting edge reaching an overlapping position in the closed region first in the closed region when moving toward the closed position of the cutting tool, radially outward of the remaining open region (viewed from the rotation axis), reaching a first closed position, wherein in the first closed position, a plurality of opposing cutting regions formed on the working surface, each having its own curved profile and forming an open region, are radially adjacent to each other, with reference to a central plane perpendicular to the pivot plane and extending through the rotation axis and the closed region, the cutting edge also having a free length cut off in the central plane in the direction from the closed region toward the rotation axis in the first closed position, wherein, viewed in a direction transverse to the central plane, the maximum opening width is formed for each of the two opposing cutting regions. Background Technology

[0004] Cutting tools of this type, particularly those for cutting pipes, cables, and conduits made of copper, steel, or fiberglass, are known in various embodiments. Furthermore, such cutting tools are known as so-called cable cutters or cable cutting pliers, wherein, in the pliers-like cutting tool, the handle section is preferably constructed in a longitudinally extending, rod-like manner, and more preferably, is not constructed with buttonhole-like channels for fingers.

[0005] Furthermore, such a cutting tool has been disclosed, for example, in DE 1 883 649 U. The cable cutters known from this example differ in their design regarding the cutting area of ​​the cutting section. The cutting areas are not arranged opposite each other, but rather staggered.

[0006] US 4026018 A discloses a clamp-like cutting tool having only a second cutting region, the second cutting region having an opening width larger than that of a first cutting region. The cutting region extends in a straight line. US 2015 / 0340849 A1 also discloses a cutting tool having only two cutting regions.

[0007] A cable cutter is known from DE29703308U1, which does not have multiple cutting sections extending from a closed region. A cable cutter similar to the one described above is known from DE19506457C2.

[0008] Such clamp-like cutting tools are known, in particular, in embodiments where the tool arms cross within the joint area. For this purpose, see, for example, DE 297 03 308A1, DE 87 02 959 U, and DE 10 2018 110105A1. In particular, clamp-like cutting tools having tool arms crossing within the joint area are the subject of this invention.

[0009] Its hinged area can be formed by hinge pins in a conventional manner. However, it can also be constructed as a hinged area with radial guides, for example, see EP 2 915 618 A1. Summary of the Invention

[0010] Based on the aforementioned prior art, the technical problem to be solved by the present invention is to provide an advantageous clamp-shaped cutting tool that is particularly improved in terms of cutting effect.

[0011] The technical problem is first solved by the technical solution of claim 1, wherein the design is such that, in the free length, at the first closed position, the maximum opening width is formed between the cutting blades in a direction transverse to the central plane, and the maximum opening width is one-third or more of the total length of the cutting blades, wherein the total length is intercepted along a straight line starting from the intersection with the near hinge axis of the opposing cutting blade and ending at the free end of the cutting blade away from the hinge axis, wherein the maximum opening width is formed for each cutting region, thereby forming at least one second and third cutting regions starting from the first cutting region following the closed region in the direction of rotation axis, the maximum opening width of which is always greater than the maximum opening width of each previous cutting region, the opposing cutting regions have the same cutting region length relative to the central plane, and in a view where the pivot plane is shown as a plane and the central plane is shown as a line, the central plane constitutes an axis of symmetry, and the visible contours of the cutting openings defined by the two cutting blades are mirror images of the axis of symmetry.

[0012] The aforementioned technical problem is also solved by the technical solution of claim 2, wherein each cutting blade is designed to have only three to seven cutting regions along its free length, such that at least two cutting regions of each cutting blade have a maximum depth of 0.4 mm or more, and further, in the vertical projection of the pointed-tailed partitions onto the central plane, a distance corresponding to each cutting region is formed between the partitions along the central plane, wherein the distance between two partitions of a cutting region is equivalent to 0.7 to 1.3 times the distance between two partitions of adjacent cutting regions.

[0013] The aforementioned technical problem is also solved by the technical solution of claim 3, wherein the design is such that, starting from the first cutting area following the closed area in the direction of rotation axis, at least one second and third cutting areas are formed, the maximum opening width of which is always greater than the maximum opening width of each previous cutting area, and the respective opposing cutting areas have the same partial length with reference to the central plane, and when the cutting tool is further closed, the remaining two concave cutting areas are converted to a position in which two openings arranged side by side and spaced apart from each other relative to the central plane are retained.

[0014] Furthermore, the aforementioned technical problem is also solved by the technical solution of claim 4, wherein each cutting region is designed to have two or more different maximum depths, the cutting region having an absolute maximum depth corresponding to half of the free length or the region adjacent to the axis of rotation from half of it, and each cutting edge having a substantially concave, sickle-shaped profile approximately two-thirds to three-quarters of the total length from the point of intersection with the near hinge axis of the opposite cutting edge when viewed in the direction toward the opposite cutting edge, the profile transitioning at the end of the cutting edge to two straight segments connected along the direction of the total length.

[0015] This invention relates to a pliers-like cutting tool, which is operated in practice according to conventional pliers. It is constructed with handle sections, as is typically designed in scissors, and each handle section preferably does not have finger openings. Preferably, in the closed state of this cutting tool, the handle areas do not contact at their free ends. More preferably, the handle areas are constructed to extend generally in a straight line.

[0016] The cutting region with its own curved profile preferably has a continuous concave curved profile.

[0017] The described technical solution is particularly effective in achieving improved cutting results in cutting pipes or, preferably, cables, especially wires. During the movement of the cutting jaws defining the kerf towards the closed position of the kerf, a first closed region is reached, initially forming a circumferentially closed cutting opening in which the workpiece to be cut, such as a cable, is embedded. In a projection toward the axis of rotation, the (first) closed region may represent a certain degree of overlap between the cutting edges or only a point-like overlap, especially when the cutting edges extend in a straight line within this region. With the formation of the (first) closed region, a first closed position is created. According to an embodiment, a plurality of pointed partitions may be provided to separate the concave cutting regions from each other. During the cutting movement of each cutting edge, each partition may (in some cases only) generate an initial point-like cutting load on the workpiece to be cut, and from this point-like load, during further cutting closing movements on both sides, the cutting process continues almost substantially circumferentially along the workpiece to be cut through the partitions. Therefore, it is advantageous to first perform multiple individual cuts within the periphery of the workpiece to be cut or along the extension direction of the cutting edge, which can be supplemented by a complete cut across the entire cross-section of the workpiece during further closing. The partition can be formed with an arched or rounded tip, but alternatively, it can also be formed with, for example, a blunt tip region with a straight face.

[0018] The total length of the cutting edge does not consider overlap only in the closed region, and therefore preferably refers to the entire cutting edge region extending to the free tip at a distance from the point of rotation. The free end of the cutting edge is defined by the radial extension of the base from the end of the cutting edge near the axis of rotation (typically determined by the intersection with another tool arm) to the end of the working area that extends sharply in cross-section in a cutting edge manner. Prior to this, this is also the absolute end of the working area in the radial direction of the tool arm or jaw.

[0019] At the position of the cutting edge overlapping only within the (first) closed region, the maximum opening width transverse to the central plane can be equivalent to one-third or more of the total length of the cutting edge, more preferably two-fifths or more, and at most two-thirds or more. Therefore, the cutting effect can also be improved.

[0020] From the jaws, the line used to measure the maximum depth perpendicular to the line is located at the first contact point of the partition that separates two adjacent cutting areas from each other, and is tangent to each partition if necessary.

[0021] In the proposed cutting tool, the depth may be 0.4 mm or more, for example, a maximum of 1 mm or more, and further for example, 1.5 mm or 2 mm.

[0022] The distance between the vertical projection of the two pointed partitions of the cutting area onto the central plane is preferably approximately 70% to 130% of the relevant distance between adjacent cutting areas. Therefore, this distance can further be equivalent to, for example, 0.8 or 0.95 times the distance between adjacent cutting areas, and even more specifically, for example, 1.15 or 1.2 times. Furthermore, this distance may, depending on the circumstances, be the same as the distance between adjacent cutting areas. Starting from the closed area, a subsequent cutting area with a gradually increasing opening width is constructed behind the first cutting area in the direction of the rotation axis, characterized by a corresponding maximum opening width. Therefore, when the cutting tool is closed, cables or similar articles can be advantageously moved or pressed increasingly from the front area of ​​the opening into or into the central area.

[0023] With the tool arm in the first closed position, preferably, seven or fewer, but at least three, concave cutting areas may be provided or distinguishable. More preferably, for example, four or five cutting areas may be provided. Accordingly, the cutting edge along the cutting jaw may be constructed with four or five cutting areas separated by pointed dividers, which have preferably concave cutting edge tip profiles in a top view toward the axis of rotation, wherein, more preferably, both cutting edges may be designed in this way. In this regard, a technical solution that forms a mirror-symmetric cutting edge with respect to the central plane can be achieved.

[0024] In a technical solution with multiple concave cutting regions having, for example, three, four, or five cutting regions, according to a feasible technical solution, considering the preferred premise of the present invention, that is, two or more concave cutting regions of the cutting blade have different maximum depths, two or more cutting regions may be designed to be the same or approximately the same in terms of their concave design and the maximum depth produced.

[0025] The cutting region of absolute maximum depth is preferably arranged within the cutting edge region, which is preferably formed at or near half the free length of the cutting edge at the first closed position, close to the axis of rotation, or within half the free length. This advantageously allows for the orientation of the cutting edge, in which the cutting region of absolute maximum depth approaches the end of the cutting process, more preferably at the point of final overlap with the opposing cutting edge. Furthermore, this arrangement and construction scheme can influence various workpieces to be cut, such as cables, which are subjected to a load towards the axis of rotation within the cutting opening only during the cutting process, preferably throughout the entire cutting process (at least after reaching the first closed position). Therefore, the cutting effect can also be improved and / or advantageous, labor-saving operation can be achieved.

[0026] Within the free length range, with each cutting edge positioned only overlapping within the closed area, the maximum opening width is formed along the middle length intercepted on the central plane between the equal cutting edges in a direction transverse to their central plane. Furthermore, the maximum opening width can be one-third or more of the total length of the equal cutting edges, and / or each cutting edge can have only three to seven cutting zones within its free length range, wherein at least two cutting zones of each cutting edge have a maximum depth of 0.4 mm or more. Moreover, furthermore, when the pointed-tailed dividers are projected vertically onto the central plane, corresponding cutting zones can be generated along the central plane between the dividers. The distance, wherein the distance between two partitions of the cutting region is equivalent to 0.7 to 1.3 times the distance between two partitions of its adjacent cutting region, and / or, starting from the first cutting region following the closed region in the direction of rotation axis, at least one second and third cutting regions are formed, the maximum opening width of which is always greater than the maximum opening width of each previous cutting region, and the respective opposing cutting regions have the same partial length relative to the central plane, and / or, each cutting region is provided with two or more different maximum depths, and the cutting region with the absolute maximum depth corresponds to half of its free length or the region connected to the rotation axis from its half-length.

[0027] At the aforementioned positions where the tool arm is in contact (in terms of the viewing angle towards the axis of rotation) or overlapping only within the (first) closed region, the maximum opening width, observed along the free length, can be formed on the middle length intercepted on the central plane between the cutting blades in a direction transverse to the central plane. This opening can also be referred to as a cutting opening. The free length can be nine-tenths or more of the total length of the equal cutting blades, and the maximum opening width can be two-fifths or more of the total length of the equal cutting blades. Furthermore, observed along the central plane, the free length of each cutting blade can be equivalent to 0.92 to 0.99 times the total length of a single cutting blade. Accordingly, the first closed position can be formed near the end of the cutting blade away from the axis of rotation.

[0028] The maximum opening width between the cutting blades, which is substantially transverse to the central plane, is preferably more than two-fifths, and at most more than four-fifths, of the total length of the cutting blades within at least one concave cutting region. The maximum opening width is formed within the concave cutting region having the absolute maximum depth.

[0029] According to one feasible implementation, each cutting edge originates from the axis of rotation at a distance intercepted on its central plane, and said distance is three-fifths or less of the total length of the equal cutting edges. Furthermore, the distance may correspond to approximately one-third or more, up to a maximum of three-fifths, of the total length of each cutting edge, and according to one feasible implementation, approximately 0.5 times the total length.

[0030] Furthermore, starting from the position where it overlaps only in the (first) closed position, as the cutting tool or its cutting edge further closes relative to the axis of rotation, only two or more radially outward concave cutting areas are subsequently removed from its free length, moving radially outward towards the radial inward. Subsequently, a new second or other closed position is generated radially inward, offset from the first closed position, wherein the radially outward concave cutting areas in the (intermediate) position preferably completely or alternatively only partially transition to an overlapping position with another cutting edge, such that, according to a preferred embodiment, within the area of ​​each cutting area, the individual partial cutting openings initially generated during the cutting process are closed.

[0031] After the concave cutting area on the radially outer side is removed, during the further closing of the cut, the concave cutting area is preferably further removed from the radially inner side to the radially outer side.

[0032] When the cutting tool or kerf is closed, there is preferably no free length. Here, the two cutting edges are in a completely overlapping position within their length range, thus preferably no longer creating any cutting opening. In the sense described, all cutting areas are eliminated. There is no longer any free length of the cutting edges.

[0033] According to one feasible implementation, the concave cutting region is formed by continuously curved cutting segments. Preferably, the continuous curve extending between two spacers constructed substantially along the total length of the cutting edge to form the concave cutting region can also be achieved by maintaining a constant radius dimension on the segments of said curve. Alternatively, however, different radii may exist on the segments of the continuous curve, wherein the arcuate segments of the curve described herein preferably transition tangentially to each other. Thus, they may have the same tangent in the transition zone. Such a cutting region may also extend only partially curved and, for example, locally have straight lines.

[0034] In another technical solution, during the closing process of this cutting tool, each tool arm is moved into a position where, when the dividing portions of the cutting areas on each cutting edge are connected to each other by imaginary straight lines or radially inward to the central plane, the cutting edges form substantially rhomboid openings with concave cutting areas on both sides. However, the imaginary straight lines are only used to facilitate understanding of the rhomboid opening in terms of its actual contour. More preferably, a longitudinally extending rhomboid opening can be formed, with the longer rhomboid axis along the central plane and the shorter rhomboid axis transverse to the central plane. Furthermore, the rhomboid sides can each be composed of multiple straight lines connecting the dividing portions, and the straight lines of the rhomboid sides can form an obtuse angle between each other, exceeding 90 degrees and less than 180 degrees, for example, about 165 to 175 degrees.

[0035] For the purposes of disclosure, the ranges or value ranges or multiples mentioned above and below also include all intermediate values, particularly those using 1 / 10 step increments of the corresponding dimension, i.e., dimensionless values ​​may also be used, depending on the circumstances. For example, one-third to three-fifths also includes disclosures of 0.43 to 0.6, 0.33 to 0.5, and 0.43 to 0.5; the disclosure of 165 to 175 degrees also includes disclosures of 165.1 to 175 degrees, 165 to 174.9 degrees, 165.1 to 174.9 degrees, and so on. This disclosure can be used, on the one hand, to define the lower and / or upper limits of the mentioned ranges, and on the other hand, alternatively or supplementarily to disclose one or more singular values ​​of the given range. Attached Figure Description

[0036] The invention is explained in detail below with reference to the accompanying drawings. In the drawings:

[0037] Figure 1 A perspective three-dimensional view of a clamp-like cutting tool with its cutting edge closed.

[0038] Figure 2 for Figure 1 The view of the cutting tool in the image;

[0039] Figure 3 for Figure 2 Side view;

[0040] Figure 4 This is a rear view of the cutting tool in the closed cut position.

[0041] Figure 5 for Figure 2 A magnified view of region V in the diagram, but with respect to the opening position of the cut;

[0042] Figure 6 For corresponding Figure 5 However, the view shows the cutting edge overlapping within the first closed area while the cutting edge is in the middle of the closed position;

[0043] Figure 7 for Figure 6 An enlarged view of region VII in the image;

[0044] Figure 8 for Figure 6 A subsequent image showing another intermediate position during the closure process of the cut;

[0045] Figure 9 for Figure 8 A magnified view of region IX in the image;

[0046] Figure 10 for Figure 8 A subsequent diagram regarding the intermediate position in another closure process;

[0047] Figure 11 for Figure 10 A magnified view of region XI in the image;

[0048] Figure 12 for Figure 10 Subsequent images;

[0049] Figure 13 for Figure 12 A magnified view of region XIII in the image. Detailed Implementation

[0050] First, combined Figures 1 to 4 The clamp-like cutting tool 1 is explained and described, preferably in the form of a cable cutter, having two tool arms 2 and 3 that preferably cross within the area formed by the hinge pin 4 (pivot). The geometric axis of rotation x is also preferably centered through the hinge pin 4. The tool arms are pivotable relative to each other along the pivot plane E. The cutting blades are preferably slidably stacked within the pivot plane E. The axis of rotation x is preferably perpendicular to the pivot plane E.

[0051] Each tool arm 2 and 3 has a shank segment 5 or 6 formed on one side of the rotation axis x, and a cutting jaw 7 or 8 formed on the other side of the rotation axis x. The cutting jaws 7 and 8 are at least, for example... Figure 5 The cutting edge (jaw) 9 is defined by its cutting blades 10 and 11 in the open position shown.

[0052] In the illustrated embodiment, the cutting jaws 7 and 8, and the cutting edges 10 and 11 constructed thereon, are substantially identical in construction. However, embodiments relating to the construction of the cutting edges 10 and 11 described below may also involve cutting tools 1 with different designs of cutting edges 10 and 11. Thus, the concave cutting region, which will also be described in detail below, may be constructed only on one cutting edge, while the other cutting edge extends in a straight line or is generally curved, and / or may not have a concave cutting region, or may have more or fewer concave cutting regions, or may have concave cutting regions that vary in geometry or size relative to the concave cutting regions of one cutting edge.

[0053] Cutting blades 10 and 11 initially have a total length g, which is cut along a straight line starting at the intersection point P with the hinge axis of the opposite cutting blade and ending at the free end of the cutting blade away from the hinge axis (see...). Figure 5 If the intersection point changes during the relative movement of the clamp arms, the change corresponds to the open position of the cutting tool. Here, each cutting edge 10 and 11, viewed in the direction toward the opposing cutting edge 11 or 10, has a substantially concave sickle-shaped profile starting from the intersection point P near the hinge axis with the opposing cutting edge, approximately two-thirds to three-quarters of the total length g, and the profile transitions at the end of the cutting edge 10 or 11 to two straight segments 12, 13 connected along the direction of the total length g.

[0054] Preferably, the outermost straight segment 13 extends continuously with respect to the axis of rotation x, while another straight segment 12, radially adjacent to the outermost straight segment 13, may form an obtuse angle with the straight segment 13 preferably exceeding 160 degrees, for example 170 or 175 degrees, and transitions to a concave curved section in the region away from the end of the straight segment 13 (see also). Figure 7 (Enlarged view in the image).

[0055] Observed along the length of each cutting edge 10, 11, each cutting edge 10, 11 preferably has multiple individual concave cutting regions 14, 15, 16, 17, and 18, which are arranged substantially along an imaginary concave line. Cutting regions 14 to 18 are separated by pointed dividers 19, 20, 21, and 22 pointing inward toward the cutting opening 9. Accordingly, cutting regions 15, 16, and 17 are respectively limited at their lateral ends by the dividers 19 to 22. Furthermore, an obtuse-angled transition between the two straight segments 12 and 13 can also be provided by another pointed divider 23. The divider can be provided by two regions that are rounded in the same direction but have different center points or focal areas of their rounded portions. Their tips can also be rounded by means of a reverse bend.

[0056] exist Figure 7In the middle, the partitions 19 to 23 are connected by imaginary straight lines G, G', G”, G”', and G””. Accordingly, the straight lines G to G”” cross the corresponding concave cutting areas 14 to 18.

[0057] In each concave cutting region 14 to 18, maximum depths t, t', t", t"' and t"" are formed perpendicular to each straight line G to G””, wherein, according to the view, the maximum depth t corresponds to cutting region 14 and straight line G, the maximum depth t' corresponds to cutting region 15 and straight line G', the maximum depth t” corresponds to cutting region 16 and straight line G, the maximum depth t”' corresponds to cutting region 17 and straight line G”', and the maximum depth t”” corresponds to cutting region 18 and straight line G””.

[0058] Cutting regions 14 to 18 are further preferably having two or more different maximum depths t to t””. An absolute maximum depth is generated, which in the illustrated embodiment describes the maximum depth t” of cutting region 16 originating from the straight line G”. Furthermore, the maximum depths t’ and t”’ of cutting regions 15 and 17 adjacent to cutting region 16 having the absolute maximum depth t” can be selected to be at least approximately the same size. The value of the maximum depth t’ and t” can be approximately 0.45 to 0.55 times the value of the absolute maximum depth t”. The other cutting regions 14 and 18 have smaller maximum depths t and t”” than cutting regions 15 and 17. Therefore, the cutting region 18 closest to the rotation axis x can have a maximum depth t””, which can be approximately 0.4 to 0.5 times the absolute maximum depth, and the concave cutting region 14 opposite to the rotation axis x can have a maximum depth t, which can be approximately 0.3 to 0.4 times the absolute maximum depth t””. Accordingly, five concave cutting regions and at least four different maximum depths are formed in the described embodiment.

[0059] The concave cutting regions 15, 16, 17, and 18 are preferably each formed by a continuously curved cutting segment. The radius of the curved cutting segment from one partition to the next partition remains constant. Alternatively, as shown, curved curves with different radii can transition seamlessly to each other within the longitudinal extension of such cutting segments. Preferably, only the concave cutting segment 14, which is furthest from the axis of rotation X, is formed by a curved cutting segment directly connecting the partition 19 that separates the cutting region 14 from the adjacent cutting segment 15, and a straight segment 12 connecting the curved cutting segment.

[0060] Self-opening position, cut opening position or Figure 5 Starting from the position shown, the cutting edge first enters the overlapping position within the first closed area S when the cutting tool closes. (See reference...) Figure 6 and 7 .

[0061] Further as Figure 7 As shown, at the overlapping positions of cutting blades 10 and 11, when the cutting areas 14, 15, 16, 17, or 18 are vertically projected onto the central plane M, distances a', a”, and a”' are generated only within the closed area S between the partitions 19, 20, 21, 22, or 23 that separate two adjacent cutting areas 14, 15, 16, 17, or 18. In one feasible embodiment, such distances a', a”, or a”' may be equal to or approximately equal to the distances a', a”, or a”' of the adjacent cutting areas 14, 15, 16, 17, or 18; alternatively, they may be 0.7 to 1.3 times the distances a', a”, or a”' of the adjacent cutting areas 14, 15, 16, 17, or 18.

[0062] In the 7th and 8th directions of the cutting jaw Figures 1 to 4 When the movement to the closed position is used to cut, for example, workpieces W such as cables embedded in the cutting notch 9, in the region of the free ends of the cutting blades 10 and 11 spaced apart from the rotation axis x, viewed along the extension direction of the rotation axis x, based on the overlapping position of the cutting blades 10 and 11, a first closed region S is reached, and the closed position is preferably a closed point (see [reference]). Figure 6 and 7 As the first closed region S is reached, the closed cutting opening 24 containing the workpiece W is first achieved during the closing process of this cutting tool 1. For the main observation angle here, its closed region is assumed to be a point. However, in practice, a (as small as possible) surface will always be produced.

[0063] In positions where tool arms 2 and 3 or cutting jaws 7 and 8 are in contact or overlapping only within the first closed region S, cutting blades 10 and 11 have a free length 1, which is intercepted along a plane M perpendicular to the cutting plane E and passing through the rotation axis x and the center plane M of the closed region S. The center plane M passes through the point or centrally passes through the surface formed within the closed region S. Furthermore, the center plane M may be present at each pivot position of tool arms 2 and 3 or cutting jaws 7 and 8, as appropriate. Figures 5 to 13 The view shown in the top view forms an axis of symmetry, in which the pivot plane E is shown as a plane and the center plane M is shown as a line, and the visible outline of the two cutting edges 10 and 11 that define the cutting opening 24 can be mirrored relative to the axis of symmetry.

[0064] The free length 1 in the closed position may be equivalent to 0.9 times or more of the total length g of the cutting blade 10 or 11, for example, up to 0.99 times or more, while reaching the first closed region S in the closed position.

[0065] On the intermediate length z intercepted on the central plane M, preferably perpendicular to the central plane M, Figure 7The maximum opening width b is formed at the aforementioned closed position, which is preferably two-fifths or more of the total length g of the cutting blades 10 or 11. In the illustrated embodiment, the maximum opening width b is preferably given within the cutting region 16, which is preferably symmetrically opposite to the central plane M and has an absolute maximum depth t”. The intermediate length z and the aforementioned free length l are taken from the intersection point P of the cutting regions 18 of the cutting blades 10 and 11 or the cutting regions 18 of both cutting blades 10 and 11 near the axis of rotation x, towards the free ends of the cutting blades 10 and 11 or towards the closed region S.

[0066] In another technical solution, the maximum opening width b is... Figure 7 The closed position shown is approximately 2 to 3 times the distance a', a”, or a”' between the two connecting pieces 19, 20, 21, 22, or 23 that separate the cutting areas 14, 15, 16, 17, or 18.

[0067] As described with respect to the maximum opening width b, in Figure 7 The positions also produce the maximum opening widths b', b”, b”’, and b”” for the other cutting regions 14, 15, 17, and 18. In the embodiment, starting from the first cutting region 14 which is connected to the closed region S in the direction of the rotation axis x, the second cutting region 15 and the third cutting region 16 are formed, and their maximum opening widths b' or b (which coincide within the cutting region 16 with the maximum opening width b) are always greater than the maximum opening widths b' or b”’ of each of the previous cutting regions 14 and 15. The always opposing cutting regions 14, 15, and 16 preferably have the same cutting region length with respect to the central plane M. Figure 7 The distances are represented by a, a', a”, and a”'.

[0068] The starting points of cutting blades 10 and 11 at the intersection point P are spaced apart from the axis of rotation x along the central plane M with respect to the first closed position. The distance a between these points may be approximately three-fifths or less of the total length of cutting blades 10 or 11, for example, 0.4 to 0.6 times. Furthermore, a straight line G”” originating from the partition 22 and crossing the cutting area 18 is aligned with the intersection point P located on the central plane M.

[0069] According to another preferred technical solution, two cutting regions 16, each having its own absolute maximum depth t, are arranged at half the free length 1. Figure 7 The region consisting of half the dimension h) or the area connected from its halfway point towards the axis of rotation x. Specifically, such as... Figure 7As shown, correspondingly, the distance from the intersection point P along the central plane M to the region with the maximum opening width b within the entire intermediate length z is less than half the dimension h of the free length 1. Therefore, according to the illustrated embodiment, the intermediate length z may be approximately 0.5 to 0.9 times, more approximately 0.7 to 0.8 times, or approximately 0.25 to 0.45 times, more approximately 0.35 to 0.4 times, of the free length 1.

[0070] The self-supplying cutting blades 10 and 11, starting from positions where they contact or overlap only within the (first) closed region S, first perform a cutting kerf 9 or a cutting area defining the cutting kerf 9 that essentially (refer to the rotation axis x) closes from the radially outer to the radially inner direction. During this process, firstly, the radially outer cutting areas 14 and 15 are removed from the free length 1, wherein... Figure 8 and 9 In the intermediate position shown in the view, an overlapping position is formed in another closed region within the area of ​​the separation portion 19 of the two cutting blades 10 and 11 facing each other. In the closed position of the cutting jaws 7 and 8, a remaining opening 25, confined on both sides along the extension direction of the central plane M, is shown between the cutting areas 15 of the two cutting blades 10 and 11. In the intermediate position shown by lines G', G”, G”’ and G””, the cutting areas 15, 16, 17 and 18 define an opening R that is generally rhomboid in shape, having a rhomboid longitudinal axis along the central plane M, the length of which may be approximately 1.8 to 2.2 times, and more preferably approximately 2 times, the length of the rhomboid transverse axis transverse to the longitudinal axis. As shown in this embodiment, the rhomboid opening preferably consists of multiple curved edge regions, i.e., cutting edges. Furthermore, as shown by lines G', G”, G”’ and G””, more preferably, the rhombus is also atypical, requiring only two or more inflection points on the long side.

[0071] Figure 10 and 11 This shows the process of further closure. Figure 8 and 9 The following diagram shows that, as shown, the cut 9 first closes within the radially outer cutting region 15, and then closes within the radially inner cutting region 18.

[0072] In addition, such as Figure 12 and 13 As shown, during the further closure of the cut 9, the remaining two concave cutting areas 16 and 17, with respect to the central plane M, form side-by-side and spaced-apart openings O, which can be fed in based on the corresponding displacements of the tool arms 2 and 3. Figure 4 The final closed position shown is, depending on the situation, essentially simultaneously sent to the overlapping position to enter the closed state, so that in Figure 4 There is no longer any free length l at the closed position shown.

[0073] List of reference numerals

[0074] 1 Cutting tool

[0075] 2 tool arms

[0076] 3-tool arm

[0077] 4 hinge pins

[0078] 5 handle sections

[0079] 6 handle sections

[0080] 7. Cutting jaw

[0081] 8-cut jaw

[0082] 9 jaws

[0083] 10 cutting blades

[0084] 11 Cutting blade

[0085] 12. Straight line segments

[0086] 13. Straight line segment

[0087] 14 Cutting Area

[0088] 15 Cutting Area

[0089] 16 Cutting Area

[0090] 17 Cutting Area

[0091] 18 Cutting Area

[0092] 19. Divider

[0093] 20. Divider

[0094] 21. Divider

[0095] 22. Divider

[0096] 23. Divider

[0097] 24 Cutting opening

[0098] 25 Remaining opening

[0099] a distance

[0100] a' distance

[0101] a" distance

[0102] a”' distance

[0103] b Opening width

[0104] b' Opening width

[0105] b” opening width

[0106] b”'Opening width

[0107] b” opening width

[0108] g total length

[0109] h Half size

[0110] 1. Free length

[0111] t Maximum depth

[0112] t' Maximum depth

[0113] t" maximum depth

[0114] t”'Maximum depth

[0115] t””Maximum Depth

[0116] x axis of rotation

[0117] z intermediate length

[0118] E Pivot Plane

[0119] G (straight line)

[0120] G' Straight line

[0121] G" straight line

[0122] G”'s straight line

[0123] G""straight line"

[0124] M center plane

[0125] O opening

[0126] P intersection point

[0127] R-shaped opening

[0128] S closed region

[0129] W workpiece

Claims

1. Pliers-like cutting tool (1) having two tool arms (2, 3) which are pivotable relative to one another about a pivot axis (X) along a pivot plane (E), wherein The tool arm (2, 3) forms a shank section (5, 6) on one side of the axis of rotation (x) and a jaw (9) on the other side of the axis of rotation, wherein the working face of the jaw (9) is configured as a cutting edge (10, 11) which, when moved towards a closed position of the cutting tool (1), first forms an overlapping position in a closing region (S) radially outside the remaining opening region, viewed in the direction of the axis of rotation (x), to a first closed position, wherein, in this position, a plurality of cutting regions (14, 15, 16, 17, 18) which are oppositely configured on the working face and each have their own curved profile and form the opening region, adjoin one another radially inwards, and, with reference to a centre plane (M) which is perpendicular to the pivot plane (E) and extends through the axis of rotation (x) and the closing region (S), the cutting edge (10, 11) also has, in the first closed position, a free length (1) in the direction of the axis of rotation (x) from the closing region (S), which is taken on the centre plane (M), which is taken in a plane perpendicular to the pivot plane (E) and extending through the axis of rotation (x) and the closing region (S), characterized in that On the free length (1), a maximum opening width (b) is formed between the cutting edges (10, 11) in the first closed position in a direction transverse to the centre plane (M), and the maximum opening width (b) is one third or more of the total length (g) of the cutting edges (10, 11), wherein the total length (g) is taken along a straight line starting from the intersection (P) of the proximal pivot axis of the opposing cutting edges and ending at the free end of the cutting edge distal to the pivot axis, wherein a maximum opening width (b', b", b'", b"") is formed for each cutting region (14, 15, 16, 17), so that, starting from the first cutting region (14) of the closing region (S) in the direction of the axis of rotation (x), at least one second and third cutting region (15, 16) is formed, the maximum opening width (b', b) of which is always greater than the maximum opening width of each of the preceding cutting regions (14, 15), the oppositely configured cutting regions (14, 15, 16) have the same cutting region length (a, a', a", a'") with respect to the centre plane (M), and, in a view in which the pivot plane (E) is shown as a plane and the centre plane (M) is shown as a line, the centre plane (M) constitutes an axis of symmetry, the visible profiles of the two cutting edges (10, 11) which define the cutting opening (24) being mirror images with respect to the axis of symmetry.

2. Pincer-like cutting tool (1) having two tool arms (2, 3) which can be pivoted relative to one another about a pivot axis (X) along a pivot plane (E), wherein The tool arms (2, 3) form a handle section (5, 6) on one side of the rotation axis (x) and a jaw (9) on the other side of the rotation axis. The working surface of the jaw (9) is configured as a cutting edge (10, 11). When the cutting edge moves toward the closed position of the cutting tool (1), it first forms an overlapping position within the closed region (S) radially outside the remaining open region, reaching a first closed position, as viewed from the rotation axis (x). Referring to a central plane (M) perpendicular to the pivot plane (E) and extending through the rotation axis (x) and the closed region (S), the cutting edge (10, 11) also has a cut-off point on the central plane (M) in the first closed position, extending from the closed region (S) toward the rotation axis (x). A free length (l), wherein the two cutting blades (10, 11) further have a plurality of concave cutting regions (14, 15, 16, 17, 18) separated from each other along the free length (l), and wherein the cutting regions (14, 15, 16, 17, 18) have a maximum depth (t, t', t”, t”’, t””) with reference to a vertical line perpendicular to an imaginary straight line (G, G', G”, G”’, G””) that closes the cutting regions, the imaginary straight line being respectively arranged on a dividing portion (19, 20, 21, 22, 23) that separates the observed cutting regions (14, 15, 16, 17 and 18) from the adjacent cutting regions (14, 15, 16, 17, 18) and terminates in a pointed shape, or the pincer-shaped cutting tool as described in claim 1, characterized in that, Each cutting edge (10, 11) has only three to seven cutting regions (14, 15, 16, 17, 18) along its free length (l), such that at least two cutting regions (14, 15, 16, 17, 18) of each cutting edge (10, 11) have a maximum depth (t, t', t”, t”’ and t””) of 0.4 mm or more, and further, in the vertical projection of the pointed-tailed partitions (19, 20, 21, 22, 23) onto the central plane (M), along the central plane (M) at each partition (19) Distances (a', a”, a”') corresponding to each cutting region (14, 15, 16, 17, 18) are formed between the cutting regions (14, 15, 16, 17, 18), wherein the distances (a', a”, a”') between the two partitions (19, 20, 16, 17, 18) of the cutting regions (14, 15, 16, 17, 18) are equivalent to 0.7 to 1.3 times the distances (a', a”, a”') between the two partitions (19, 20, 21, 22, 23) of the adjacent cutting regions (14, 15, 16, 17, 18).

3. Plier-like cutting tool (1) having two tool arms (2, 3) which can be pivoted relative to one another about a pivot axis (X) along a pivot plane (E), wherein The tool arms (2, 3) form a handle section on one side of the rotation axis (x) and a jaw (9) on the other side of the rotation axis. The working surface of the jaw (9) is also constructed as a cutting edge (10, 11). When the cutting edge moves toward the closed position of the cutting tool (1), it first forms an overlapping position in the closed area (S) on the radially outer side of the remaining open area when viewed from the rotation axis (x), reaching a first closed position. At the first closed position, multiple opposing cutting areas (14, 15, 16) are constructed on the working surface and each has its own curved profile and forms an open area. 17, 18) are radially adjacent to each other, with reference to a central plane (M) extending perpendicular to the pivot plane (E) and passing through the rotation axis (x) and the closed region (S), the cutting blades (10, 11) also have a free length (l) cut off on the central plane (M) in the first closed position from the closed region (S) in the direction toward the rotation axis (x), wherein, viewed in a direction transverse to the central plane (M), the maximum opening width (b) is formed for each of the two opposing cutting regions (S), or a cutting tool as described in any one of the preceding claims, characterized in that, Starting from the first cutting area (14) following the closed area (S) in the direction of the rotation axis (x), at least one second and third cutting areas (15, 16) are formed, the maximum opening width of which is always greater than the maximum opening width of each of the previous cutting areas (14, 15), and the respectively opposite cutting areas (14, 15, 16, 17, 18) have the same partial length with reference to the central plane (M), and when the cutting tool (1) is further closed, the remaining two concave cutting areas (16, 17) are converted to a position in which two openings (O) are reserved that are arranged side by side and spaced apart from each other relative to the central plane (M).

4. The cutting tool according to any one of claims 1 to 3, wherein, Each cutting region (14, 15, 16, 17, 18) is provided with two or more different maximum depths (t, t', t”, t”’, t””). The cutting region (16) with the absolute maximum depth (t”) corresponds to half of the free length (l) or the region adjacent to the axis of rotation (x) from the half of the free length (l). Each cutting edge (10, 11) has a concave, sickle-shaped profile from the intersection (P) with the near hinge axis of the opposite cutting edge (11, 10) at two-thirds to three-quarters of the total length (g) when viewed in the direction toward the opposite cutting edge (10, 11). The profile transitions at the end of the cutting edge (10, 11) to two straight segments (12, 13) connected in the direction of the total length (g).

5. The cutting tool according to one of claims 1 to 3, characterized in that In the position where each working arm (2, 3) is in an overlapping position only within the closed area (S), the free length (l) is nine-tenths or more of the total length (g) of each cutting blade (10, 11), and the maximum opening width (b) is two-fifths or more of the total length of the cutting blades (10, 11).

6. The cutting tool according to one of claims 1 to 3, characterized in that The cutting edges (10, 11) start from the axis of rotation (x) at a distance (a) intercepted on the central plane (M), and the distance is the total length (g) of the cutting edges (10, 11) or three-fifths or less of the total length.

7. The cutting tool according to one of claims 1 to 3, characterized in that Starting from a position where the cutting tool (1) is in an overlapping position only within the closed region (S), as the cutting tool (1) further closes relative to the axis of rotation (x), the two radially outer concave cutting regions (10, 11) are subsequently removed from the free length (l) only from the radial outside to the radial inside.

8. The cutting tool of claim 7 wherein, When the cutting tool (1) closes further, the remaining two concave cutting areas (16, 17) are transferred to a position in which two openings (O) are left side by side and spaced apart from each other relative to the central plane (M).

9. The cutting tool of claim 8 wherein, There is no free length (l) when the cutting tool (1) is closed.

10. The cutting tool according to one of claims 1 to 3, characterized in that The concave cutting areas (14, 15, 16, 17, 18) are formed by continuously curved and extended cutting segments.

11. The cutting tool according to one of claims 1 to 3, characterized in that During the closing process of the cutting tool (1), each tool arm (2, 3) is switched to a position in which the partitions (19, 20, 21, 22, 23) of the cutting areas (14, 15, 16, 17, 18) on each cutting blade (10, 11) are connected to each other by imaginary straight lines (G', G”, G”’, G””) or connected radially inward to the central plane (M), and the cutting blade (10, 11) forms a diamond-shaped opening (R) with concave cutting areas (14, 15, 16, 17, 18) on both sides.

Images