EP3492696A1 - Chisel, in particular round shaft chisel - Google Patents
Chisel, in particular round shaft chisel Download PDFInfo
- Publication number
- EP3492696A1 EP3492696A1 EP18211085.8A EP18211085A EP3492696A1 EP 3492696 A1 EP3492696 A1 EP 3492696A1 EP 18211085 A EP18211085 A EP 18211085A EP 3492696 A1 EP3492696 A1 EP 3492696A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chisel
- groove
- bit
- centering
- support element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/19—Means for fixing picks or holders
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/19—Means for fixing picks or holders
- E21C35/197—Means for fixing picks or holders using sleeves, rings or the like, as main fixing elements
Definitions
- the invention relates to a chisel, in particular round shank chisel, with a chisel head and a chisel shank, with a support member having on its underside a projecting spigot and wherein the spigot has an inclined to the central longitudinal axis of the chisel centering surface which merges into a seat surface.
- the fastening sleeve is designed as a clamping sleeve, which is formed from a resilient material, such as steel sheet. It has a longitudinal slot which is bounded by sleeve edges.
- a longitudinal slot of the mounting sleeve diameter can be varied, with the sleeve edges to move toward each other (small diameter) or spaced from each other (large diameter sleeve). In this way, different clamping states can be achieved.
- On the mounting sleeve designed as a wear protection disk support member is mounted. This support member has a circular cross-section and is of a bore penetrated.
- the bore is dimensioned such that the fastening sleeve is held in a bias state with reduced outer diameter relative to its relaxed state.
- the outer diameter thus produced is selected such that the clamping sleeve can be inserted with little or no effort in a bit holder of a chisel holder.
- the insertion movement is limited by means of the support element.
- the support member Upon further insertion of the drill collar in the bore, the support member is moved in a non-covered by the clamping sleeve portion of the drill collar. Then, the fastening sleeve jumps radially and clamped in the bore of the chisel holder.
- the round shank bit is axially captive, but freely rotatably supported in the circumferential direction.
- To disassemble the chisel it is driven out of the chisel holder by means of a mandrel acting on the back of the chisel shaft.
- the EP 1 427 913 B1 discloses a disc for a rotary cutting bit comprising: a front side and a back side, the front side having a plurality of ribs and the rear side having a plurality of recesses.
- the rear side furthermore has a bevelled edge arranged circumferentially to a central bore.
- the recesses are evenly spaced from each other and to the chamfered edge.
- the bevelled edge angles sharply into the surface of the back. The sharp angle can cause the disc does not rest flat on the holding block below, resulting in increased abrasion of the disc and the holding block. Furthermore, the sharp transition can cause the disc to jam and prevent its rotation, resulting in one-sided wear of the cutting bit.
- a chisel, in particular round shank chisel proposed with a chisel head and a chisel shank, wherein in the region of the chisel shank a fastening sleeve is held and with a support member having a guide portion, wherein the support member has on its underside a projecting spigot.
- the centering lug has a centering surface which extends inclined to the central longitudinal axis of the chisel and which, via a recessed recess, extends in a direction extending radially to the central longitudinal axis, circumferential support surface passes.
- the recess is incorporated in the centering surface and the support surface so that it receives an opposite sharp edge of the chisel holder in the mounted state.
- the support element is therefore not within the scope of manufacturing tolerances on the edge of the chisel holder, whereby a flat support of the support element is ensured on the provided support surface of the chisel holder.
- the abrasion of the support member and the bit holder is reduced while improving the free rotation of the disc.
- results in an edge This represents a continuity jump with a negative effect on the rotation and thus wear behavior.
- the object of the invention is achieved in that a circumferential groove is arranged in the transition region from the centering surface to the seat surface and that the depth of the groove relative to the seat surface is greater than or equal to 0.3 mm.
- the support element In assembly position, the support element lies with its seat on a wear surface of a chisel holder.
- the groove releases the associated edge region of the chisel holder, which leads to a flat support of the support element and a free rotation. Due to the load during use wear the support member and the bit holder in the region of the seat or the wear surface. This results in the chisel holder in Area of the groove a circumferential bead. This results from the fact that the support element abrades the wear surface of the bit holder due to the rotation of the bit and the support element.
- the support element receives an additional lateral guidance, whereby, for example, jamming of the support element and thus a one-sided and thus rapid wear of the support element and the chisel can be safely avoided.
- Through the groove and the cut into the groove portion of the bit holder forms a labyrinth-like sealing area, which reduces the penetration of waste material in the region of the drill collar.
- the depth of the groove of at least 0.3 mm ensures a safe lateral guidance and a noticeable reduction of the entry of space material.
- the bit holder should be harder than the support element in the area of the wear surface. This allows the bit holder to survive multiple wear cycles of the bit. If a chisel is worn, a new chisel can be combined with the chisel holder. The groove of this new bit then picks up the bead, maintaining the ideal support of the support element on the wear surface of the bit holder.
- the centering surface merges tangentially into the surface of the groove.
- the centering surface thus merges seamlessly into the surface formed by the groove.
- no continuity jump forms, which has a positive effect on the rotational behavior and thus the wear of the bit and the support element.
- a good lateral guidance of the support element results from the fact that the groove has a depth between 0.3 mm and 2 mm, preferably between 0.5 mm and 1.5 mm, relative to the seat. If the depth of the groove is chosen smaller than 0.3 mm, so there is no sufficiently pronounced bead, which leads to a lateral stabilization of the support element. Groove depths up to 2 mm provide a good sealing effect (labyrinth seal) between the bead and the groove. If the range between 0.5 mm and 1.5 mm is selected, the result is a good combined effect between sealing and side guide.
- the groove is, starting from the seat, incorporated in the support element.
- the material thickness of the support element in the region of the groove is reduced by the depth.
- the ratio of the thickness of the groove receiving part of the support element to the depth of the groove is at least 2 to 1 and / or that the material thickness between the groove and one of the seat opposite support surface is at least 2 mm.
- a uniform abrasion of the chisel holder over the entire wear surface without the formation of a free rotation disabled edge on the outer circumference of the wear surface can be achieved in that the support member has a diameter between 38 mm and 49 mm, preferably between 40 mm and 48 mm.
- the support member includes at its outer periphery at least approximately with the wear surface of the chisel holder.
- the range between 38 mm and 49 mm is to be preferred in particular for use in road milling.
- a diameter of 38 mm forms a lower limit, which ensures sufficient carrying capacity of the support element.
- 49 mm represents an upper limit, where the friction between bit holder, support element and chisel is such that an optimized turning behavior of the bit is possible.
- An optimized rotational behavior is when free rotation of the bit is possible in order to avoid one-sided wear of the bit, but at the same time excessive rotation of the bit are avoided, resulting in increased abrasion of a bearing surface of the bit, the support element and the wear surface of the chisel holder leads.
- a diameter range between 40 mm and 48 mm is preferred for large milling provide, and this area also forms an optimum between sufficient bearing capacity of the support element and turning capability of the bit.
- a particularly preferred variant of the invention is such that the groove has a rounded, in particular circular contour and that the radius of the contour is in a range between 0.5 mm and 6 mm, particularly preferably at a radius of 1.5 mm. Furthermore, it can be provided that the surface of the groove is transferred over a rounding section in the surface of the seat. By the circular contour or the rounded transition from the surface of the groove in the surface of the seat edges in the area between the seat and the wear surface are avoided. This leads to an improved rotatability of the support element and thus to a reduced wear of the bit. From a lower radius of the groove of 0.5 mm ensures that the bead is not formed too sharp-edged to achieve good rotation of the support element. In this case, sufficient stability of the support element is achieved up to a radius of 6 mm.
- the rotatability can be improved in particular in that the rounding section is formed by a circular arc section with a second radius in a range between 0.2 mm and 25 mm, particularly preferably 1.0 mm.
- the rounding section merges tangentially into the seat surface.
- a secure guidance of the support element on the drill collar can be achieved in that the support element forms a guide region, which is formed by a bore extending in the direction of the central longitudinal axis of the bit, that the guide region is transferred via a circumferential ridge in the centering and that Bridge a width in a range between 0.1 mm and 2.0 mm, more preferably 0.5 mm.
- the guide area is in the assembled state opposite a cylindrically shaped centering of the drill collar. In this case, the diameter of the centering section is selected such that it can move with a predetermined play in the bore forming the guide area.
- the rotary bearing thus formed ensures a free rotation between the guide region of the support element and the centering of the drill collar with low lateral offset transverse to the central longitudinal axis of the bit. Since both the guide region and the centering section are formed as continuous cylindrical surfaces with constant diameters, the free rotation of disabled edges and transitions can be avoided.
- the guide extends over the entire length of the guide region and the centering, resulting in a high mechanical strength in this area. By the web is avoided that the material thickness of the centering approach in the transition to the guide area is too small and thus sensitive to mechanical damage.
- the width of the web is to be chosen as small as possible in order to obtain the largest possible centering surfaces and guide areas under the given spatial conditions and the preferred inclination of the centering surface.
- FIG. 1 shows in side view a chisel 10 in its mounting position on a chisel holder 40, wherein a portion of the chisel holder 40 is shown in a sectional view.
- the bit 10 is designed as a round shank chisel. It has a chisel head 13, which merges into a chisel tip 14, consisting of hard material, for example hard metal.
- a cup is incorporated in the chisel head 13 at the end, in which the chisel tip 14 is soldered.
- the chisel head 13 merges into a cylindrical centering section 12, which merges into a cylindrical chisel shaft 11 after a tapering region 12.
- the chisel head can pass directly into the chisel shaft 11 even without the rejuvenation area.
- the chisel shank 11 is in the representation predominantly covered by a holding projection 43 of the chisel holder 40 and by a fastening sleeve 20.
- a circumferential groove 15 is introduced in the drill collar 11, a circumferential groove 15 is introduced.
- the bit 10 is formed with its chisel shank 11, its chisel head 13 and its chisel tip 14 rotationally symmetrical to the running through the chisel tip 14 center longitudinal axis.
- the fastening sleeve 20 is arranged in the area of the chisel shank 11, the fastening sleeve 20 is arranged. It is made of a sheet material, such as steel.
- holding elements 21 are pronounced from the flat material and are expressed in the area enclosed by the fastening sleeve 20. The holding elements 21 are thereby cut free along two edges which extend in the circumferential direction of the fastening sleeve 20.
- the fastening sleeve 20 is rolled in such a way that a circular cross-section results, leaving a clamping slot 23.
- the holding elements 21 engage in the groove 15 of the cutter shank 11.
- the fastening sleeve holds the chisel 10 with the holding elements 21, while it is itself held by its bias in the holding projection 43 of the chisel holder 40. It thus enables a rotation of the bit 10 about its central longitudinal axis, while a movement in the direction of the central longitudinal axis is blocked.
- a support member 30 is provided between the chisel head 13 and the holding lug 43 of the chisel holder 40.
- the bit holder 40 has a base part 41, to which a lower side projecting tab 42 is formed.
- the base member 41 also carries the integrally formed retaining lug 43, in which a bit holder 46 is introduced as a cylindrical bore.
- the bit receptacle 46 is designed as a through hole, which is open at its two longitudinal ends.
- a Austreibdorn (not shown) of a Austreibtechnikmaschinectiones be introduced. This Austreibdorn then acts on the free end of the drill collar 11 a.
- the plug projection 42 remote from the end of the bit holder 46 opens into a cylindrical portion 44 of the retaining projection 43.
- wear marks 45 are provided in the form of circumferential rings.
- FIG. 2 shows one in the FIG. 1 with II marked detail.
- the chisel head 13 is closed in the direction chisel shaft 11 with a collar 13.2, which forms a support surface 13.1.
- This rests on a support surface 31.1 of the support element 30, which is formed by a recess 31 on the upper side of the support element 30.
- the support surface 31.1 is correspondingly limited on the outside by an edge 31.2.
- the support member 30 On the opposite side of the support surface 31.1, the support member 30 has a seat surface 33, with which it rests on a wear surface 47 of the cylindrical portion 44 of the holding lug 43.
- the support member 30 is constructed substantially rotationally symmetrical to the central longitudinal axis of the bit 10.
- the seat 33 passes over an inner circumferential groove 35 in an inclined to the central longitudinal axis extending centering surface 34.1 of a spigot 34 over.
- the centering projection 34 of the support member 30 is inserted into a correspondingly shaped centering receptacle 48 of the bit holder 40.
- the support member 30 has a bore, through which a guide portion 36 is formed for guiding the chisel 10.
- the centering section 12 of the drill collar 11 is assigned to the guide region 36.
- the outer diameter of the cylindrical centering 12 is tuned to the inner diameter of the guide portion 36 that a free rotation between the support member 30 and the centering 12 is maintained.
- the play between these two components should be chosen so that the smallest possible lateral offset (transverse to the central longitudinal axis of the bit (10)) is formed.
- the diameters of the guide region 36 and of the centering section remain the same over their entire axial length. As a result, the rotational capability of the bit 10 obstructing edges and discontinuities are avoided in this area.
- the centering section 12 following a tapering region 12.1, merges into a cylindrical tool shank 11.
- the chisel shaft 11 is held on the mounting sleeve 20 in the retaining lug 43 of the chisel holder 40.
- the fastening sleeve 20 has a chamfer 22.
- the bit 10 may rotate about the central longitudinal axis.
- the free rotation ensures that I wear the chisel 10 evenly over its entire circumference.
- the wear surface 47 is abraded.
- the present wear of the retaining projection 43 can be about the in FIG. 1 shown wear marks 45 are evaluated.
- the wear surface 47 of the retaining lug 43 which is flat when new, works into the groove 35 of the support element 30, as described in US Pat FIG. 2 is shown.
- the support member 30 receives an additional lateral guidance, which has a positive effect on the rotation of the support member 30 and thus of the bit 10.
- the centering surface 34.1 merges tangentially into the surface of the groove 35, so that no the rotatability obstructing edges are formed. Accordingly, the surface of the groove 35 via a rounding section without sharp edges in the seat 33 via.
- the groove 35 counteracts with its radially outer surface portion forces acting radially inwardly on the support member 30. Radially outward forces counteract the radially inner surface portion. This reduces the force which must be absorbed by the centering surface 34.1, which leads in this area to a reduced surface pressure and correspondingly to a reduced wear. In addition, this support also counteracts a wobbling movement in the disc plane of the support element 30, which causes a significant reduction in wear on the bit holder 40. Furthermore, the groove is used with her worked from the wear surface 47 counterpart as a labyrinthine seal. Abraummaterial, which passes between the seat 33 and the wear surface 47 is prevented by this seal on further penetration and so does not or only to a reduced extent in the area of the drill collar 11th
- the support member 30 is shown again.
- the seat surface 33 merges into the groove 35 arranged circumferentially to form a central bore.
- the groove 35 follows the likewise circumferentially arranged to the central bore centering projection 34 with the inclined centering 34.1.
- the surface of the central bore forms the guide region 36.
- the centering projection 34 is closed by a circumferential web 39.
- FIG. 4 shows in a sectional side view a section of a in the FIGS. 1 to 3 shown support element. It has on its upper side the cup-shaped recess 31, which is bounded on the outside by the rounded edge 31.2.
- the recess 31 forms the support surface 31.1, which has a rounding in the Guidance area 36 passes.
- the support member 30 Turned away from the recess 31, the support member 30, the seat 33, which is arranged plane parallel to the support surface 31.1.
- the seat surface 33 merges with the centering shoulder 34 via the groove 35.
- centering 34.1 of the spigot 34 is arranged inclined to the guide portion 36 shown by a central bore.
- the centering lug 31 is closed by the web 39, which connects the centering surface 34.1 and the guide portion 36.
- the depth of the groove 35 with respect to the seat surface 34 is one millimeter at a radius 37 of 1.5 mm marked by an arrow.
- the thickness of the support element 30 is between the support surface 31.1 and the seat 33 five millimeters. This ensures a sufficient material thickness between the groove 35 and the support surface 31.1.
- a second radius 38 of the rounding section between the groove 35 and the seat surface 33 is one millimeter, wherein the rounding section merges tangentially into the surface of the groove 35 and the seat surface 33.
- the width of the web is in the embodiment 0.5 mm.
Abstract
Die Erfindung betrifft einen Meißel, insbesondere Rundschaftmeißel, mit einem Meißelkopf und einem Meißelschaft, mit einem Stützelement, das an seiner Unterseite einen vorstehenden Zentrieransatz aufweist und wobei der Zentrieransatz eine zur Mittellängsachse des Meißels geneigt verlaufende Zentrierfläche aufweist, die in eine Sitzfläche übergeht. Dabei ist es vorgesehen, dass im Übergangbereich von der Zentrierfläche zu der Sitzfläche eine umlaufende Nut angeordnet ist und dass die Tiefe der Nut gegenüber der Sitzfläche größer oder gleich 0,3 mm ist.Der Meißel weist eine optimierte Drehbarkeit und damit einen geringen Verschleiß auf.The invention relates to a chisel, in particular round shank chisel, with a chisel head and a chisel shank, with a support member having on its underside a projecting spigot and wherein the spigot has an inclined to the central longitudinal axis of the chisel centering surface, which merges into a seat surface. It is provided that in the transition region from the centering surface to the seat a circumferential groove is arranged and that the depth of the groove relative to the seat is greater than or equal to 0.3 mm. The bit has an optimized rotation and thus a low wear.
Description
Die Erfindung betrifft einen Meißel, insbesondere Rundschaftmeißel, mit einem Meißelkopf und einem Meißelschaft, mit einem Stützelement, das an seiner Unterseite einen vorstehenden Zentrieransatz aufweist und wobei der Zentrieransatz eine zur Mittellängsachse des Meißels geneigt verlaufende Zentrierfläche aufweist, die in eine Sitzfläche übergeht.The invention relates to a chisel, in particular round shank chisel, with a chisel head and a chisel shank, with a support member having on its underside a projecting spigot and wherein the spigot has an inclined to the central longitudinal axis of the chisel centering surface which merges into a seat surface.
Ein derartiger Meißel ist aus der
Die
In der
Es ist daher Aufgabe der Erfindung, einen Meißel der eingangs erwähnten Art mit optimiertem Verschleißverhalten zu schaffen.It is therefore an object of the invention to provide a chisel of the type mentioned with optimized wear behavior.
Die Aufgabe der Erfindung wird dadurch gelöst, dass im Übergangbereich von der Zentrierfläche zu der Sitzfläche eine umlaufende Nut angeordnet ist und dass die Tiefe der Nut gegenüber der Sitzfläche größer oder gleich 0,3 mm ist.The object of the invention is achieved in that a circumferential groove is arranged in the transition region from the centering surface to the seat surface and that the depth of the groove relative to the seat surface is greater than or equal to 0.3 mm.
In Montagestellung liegt das Stützelement mit seiner Sitzfläche auf einer Verschleißfläche eines Meißelhalters auf. Im Neuzustand stellt die Nut den zugeordneten Kantenbereich des Meißelhalters frei, was zu einer planen Auflage des Stützelementes und einer freien Drehbarkeit führt. Durch die Belastung während der Benutzung verschleißen das Stützelement und der Meißelhalter im Bereich der Sitzfläche beziehungsweise der Verschleißfläche. Dabei entsteht am Meißelhalter im Bereich der Nut ein umlaufender Wulst. Dieser entsteht dadurch, dass das Stützelement die Verschleißfläche des Meißelhalters in Folge der Rotation des Meißels und des Stützelementes abschleift. Mit dem Wulst erhält das Stützelement eine zusätzliche seitliche Führung, wodurch beispielsweise ein Verklemmen des Stützelementes und somit eine einseitige und damit schnelle Abnutzung des Stützelementes und des Meißels sicher vermieden werden kann. Durch die Nut und den in die Nut eingeschliffenen Bereich des Meißelhalters bildet sich ein labyrinthartiger Dichtungsbereich aus, der das Eindringen von Abraummaterial in den Bereich des Meißelschaftes verringert. Damit wird auch in diesem Bereich der Verschleiß verringert und die freie Drehbarkeit des Meißels verbessert. Die Tiefe der Nut von mindestens 0,3 mm gewährleistet eine sichere seitliche Führung sowie eine merkliche Reduzierung des Eintrags von Abraummaterial.In assembly position, the support element lies with its seat on a wear surface of a chisel holder. When new, the groove releases the associated edge region of the chisel holder, which leads to a flat support of the support element and a free rotation. Due to the load during use wear the support member and the bit holder in the region of the seat or the wear surface. This results in the chisel holder in Area of the groove a circumferential bead. This results from the fact that the support element abrades the wear surface of the bit holder due to the rotation of the bit and the support element. With the bead, the support element receives an additional lateral guidance, whereby, for example, jamming of the support element and thus a one-sided and thus rapid wear of the support element and the chisel can be safely avoided. Through the groove and the cut into the groove portion of the bit holder forms a labyrinth-like sealing area, which reduces the penetration of waste material in the region of the drill collar. Thus, the wear is reduced in this area and the free rotation of the chisel improved. The depth of the groove of at least 0.3 mm ensures a safe lateral guidance and a noticeable reduction of the entry of space material.
Der Meißelhalter sollte im Bereich der Verschleißfläche härter als das Stützelement sein. Dadurch kann der Meißelhalter mehrere Verschleißzyklen des Meißels überstehen. Ist ein Meißel verschlissen, kann ein neuer Meißel zu dem Meißelhalter kombiniert werden. Die Nut dieses neuen Meißels nimmt dann den Wulst auf, wobei die ideale Auflage des Stützelements auf der Verschleißfläche des Meißelhalters erhalten bleibt.The bit holder should be harder than the support element in the area of the wear surface. This allows the bit holder to survive multiple wear cycles of the bit. If a chisel is worn, a new chisel can be combined with the chisel holder. The groove of this new bit then picks up the bead, maintaining the ideal support of the support element on the wear surface of the bit holder.
Entsprechend einer bevorzugten Ausgestaltungsvariante der Erfindung kann es vorgesehen sein, dass die Zentrierfläche tangential in die Oberfläche der Nut übergeht. Die Zentrierfläche geht somit übergangslos in die durch die Nut gebildete Oberfläche über. Dadurch bildet sich kein Stetigkeitssprung aus, was sich positiv auf das Drehverhalten und somit den Verschleiß des Meißels und des Stützelementes auswirkt. Durch den stetigen Übergang von der Zentrierfläche in die Oberfläche der Nut wird die Fläche zur Aufnahme von seitlich einwirkenden Kräften vergrößert, was zu einer geringeren Flächenpressung und damit zu einem reduzierten Verschleiß im Bereich der Zentrieraufnahme des Meißelhalters führt.According to a preferred embodiment variant of the invention, it can be provided that the centering surface merges tangentially into the surface of the groove. The centering surface thus merges seamlessly into the surface formed by the groove. As a result, no continuity jump forms, which has a positive effect on the rotational behavior and thus the wear of the bit and the support element. Due to the continuous transition from the centering surface into the surface of the groove, the surface for receiving laterally acting forces is increased, which leads to a lower surface pressure and thus to a reduced wear in the region of the centering of the chisel holder.
Eine gute seitliche Führung des Stützelementes ergibt sich dadurch, dass die Nut eine Tiefe zwischen 0,3 mm und 2 mm, vorzugsweise zwischen 0,5 mm und 1,5 mm, gegenüber der Sitzfläche aufweist. Wird die Tiefe der Nut kleiner als 0,3 mm gewählt, so ergibt sich kein ausreichend ausgeprägter Wulst, der zu einer Seitenstabilisierung des Stützelements führt. Nuttiefen bis 2 mm ergeben eine gute Dichtwirkung (Labyrinthdichtung) zwischen dem Wulst und der Nut. Wird der Maßbereich zwischen 0,5 mm und 1,5 mm gewählt, so ergibt sich eine gute kombinierte Wirkung zwischen Abdichtung und Seitenführung.A good lateral guidance of the support element results from the fact that the groove has a depth between 0.3 mm and 2 mm, preferably between 0.5 mm and 1.5 mm, relative to the seat. If the depth of the groove is chosen smaller than 0.3 mm, so there is no sufficiently pronounced bead, which leads to a lateral stabilization of the support element. Groove depths up to 2 mm provide a good sealing effect (labyrinth seal) between the bead and the groove. If the range between 0.5 mm and 1.5 mm is selected, the result is a good combined effect between sealing and side guide.
Die Nut ist, ausgehend von der Sitzfläche, in das Stützelement eingearbeitet. Dadurch ist die Materialstärke des Stützelementes im Bereich der Nut um deren Tiefe reduziert. Um dennoch eine ausreichende Stabilität und Langlebigkeit des Stützelementes zu erhalten kann es vorgesehen sein, dass das Verhältnis der Dicke des die Nut aufnehmenden Teils des Stützelementes zur Tiefe der Nut mindestens 2 zu 1 beträgt und/oder dass die Materialdicke zwischen der Nut und einer der Sitzfläche gegenüberliegenden Stützfläche mindestens 2 mm beträgt.The groove is, starting from the seat, incorporated in the support element. As a result, the material thickness of the support element in the region of the groove is reduced by the depth. In order nevertheless to obtain sufficient stability and durability of the support element, it may be provided that the ratio of the thickness of the groove receiving part of the support element to the depth of the groove is at least 2 to 1 and / or that the material thickness between the groove and one of the seat opposite support surface is at least 2 mm.
Ein gleichmäßiger Abrieb des Meißelhalters über die gesamte Verschleißfläche ohne die Bildung eines die freie Drehung behinderten Randes am Außenumfang der Verschleißfläche kann dadurch erreicht werden, dass das Stützelement einen Durchmesser zwischen 38 mm und 49 mm, bevorzugt zwischen 40 mm und 48 mm, aufweist. Damit schließt das Stützelement an seinem Außenumfang zumindest annähernd mit der Verschleißfläche des Meißelhalters ab.A uniform abrasion of the chisel holder over the entire wear surface without the formation of a free rotation disabled edge on the outer circumference of the wear surface can be achieved in that the support member has a diameter between 38 mm and 49 mm, preferably between 40 mm and 48 mm. Thus, the support member includes at its outer periphery at least approximately with the wear surface of the chisel holder.
Der Bereich zwischen 38 mm und 49 mm ist dabei insbesondere für den Einsatz in Straßenfräsen zu bevorzugen. Dabei bildet ein Durchmesser von 38 mm eine untere Grenze, die eine ausreichende Tragfähigkeit des Stützelementes gewährleistet. 49 mm stellt eine obere Grenze dar, bei der die Reibung zwischen Meißelhalter, Stützelement und Meißel derart ist, dass ein optimiertes Drehverhalten des Meißels möglich ist. Ein optimiertes Drehverhalten liegt dann vor, wenn eine freie Drehung des Meißels möglich ist, um eine einseitige Abnutzung des Meißels zu vermeiden, gleichzeitig aber zu starke Drehungen des Meißels vermieden werden, welche zu einem verstärkten Abrieb einer Auflagefläche des Meißels, des Stützelementes und der Verschleißfläche des Meißelhalters führt.The range between 38 mm and 49 mm is to be preferred in particular for use in road milling. In this case, a diameter of 38 mm forms a lower limit, which ensures sufficient carrying capacity of the support element. 49 mm represents an upper limit, where the friction between bit holder, support element and chisel is such that an optimized turning behavior of the bit is possible. An optimized rotational behavior is when free rotation of the bit is possible in order to avoid one-sided wear of the bit, but at the same time excessive rotation of the bit are avoided, resulting in increased abrasion of a bearing surface of the bit, the support element and the wear surface of the chisel holder leads.
Ein Durchmesserbereich zwischen 40 mm und 48 mm ist bevorzugt für Großfräsen vorzusehen, wobei dieser Bereich auch hier ein Optimum zwischen ausreichender Tragfähigkeit des Stützelementes und Drehfähigkeit des Meißels bildet.A diameter range between 40 mm and 48 mm is preferred for large milling provide, and this area also forms an optimum between sufficient bearing capacity of the support element and turning capability of the bit.
Eine besonders bevorzugte Erfindungsvariante ist derart, dass die Nut eine abgerundete, insbesondere kreisförmige Kontur aufweist und dass der Radius der Kontur in einem Bereich zwischen 0,5 mm und 6 mm, besonders bevorzugt bei einem Radius von 1,5 mm, liegt. Weiterhin kann es vorgesehen sein, dass die Oberfläche der Nut über einen Verrundungsabschnitt in die Oberfläche der Sitzfläche übergeleitet ist. Durch die kreisförmige Kontur beziehungsweise die verrundete Überleitung von der Oberfläche der Nut in die Oberfläche der Sitzfläche werden Kanten im Bereich zwischen der Sitzfläche und der Verschleißfläche vermieden. Dies führt zu einer verbesserten Drehbarkeit des Stützelements und somit zu einem reduzierten Verschleiß des Meißels. Ab einem unteren Radius der Nut von 0,5 mm ist gewährleistet, dass der Wulst nicht zu scharfkantig ausgebildet wird, um eine gute Drehbarkeit des Stützelementes zu erreichen. Dabei wird bis zu einem Radius von 6 mm eine ausreichende Steitenstabilität des Stützelementes erreicht.A particularly preferred variant of the invention is such that the groove has a rounded, in particular circular contour and that the radius of the contour is in a range between 0.5 mm and 6 mm, particularly preferably at a radius of 1.5 mm. Furthermore, it can be provided that the surface of the groove is transferred over a rounding section in the surface of the seat. By the circular contour or the rounded transition from the surface of the groove in the surface of the seat edges in the area between the seat and the wear surface are avoided. This leads to an improved rotatability of the support element and thus to a reduced wear of the bit. From a lower radius of the groove of 0.5 mm ensures that the bead is not formed too sharp-edged to achieve good rotation of the support element. In this case, sufficient stability of the support element is achieved up to a radius of 6 mm.
Die Drehbarkeit kann dabei insbesondere dadurch verbessert sein, dass der Verrundungsabschnitt von einem Kreisbogenabschnitt mit einem zweiten Radius in einem Bereich zwischen 0,2 mm und 25 mm, besonders bevorzugt von 1,0 mm, gebildet ist.The rotatability can be improved in particular in that the rounding section is formed by a circular arc section with a second radius in a range between 0.2 mm and 25 mm, particularly preferably 1.0 mm.
Auch im Bereich des Übergangs von der Nut zu der Sitzfläche ist es bezüglich der Drehbarkeit des Stützelements und des Meißels vorteilhaft, wenn keine scharfen Kanten vorliegen. Daher kann es vorgesehen sein, dass der Verrundungsabschnitt tangential in die Sitzfläche übergeht.Also in the region of the transition from the groove to the seat surface, it is advantageous with regard to the rotatability of the support element and of the bit when there are no sharp edges. Therefore, it can be provided that the rounding section merges tangentially into the seat surface.
Eine sichere Führung des Stützelementes an dem Meißelschaft kann dadurch erreicht werden, dass das Stützelement einen Führungsbereich bildet, der von einer sich in Richtung der Mittellängsachse des Meißels erstreckenden Bohrung gebildet ist, dass der Führungsbereich über einen umlaufenden Steg in die Zentrierfläche übergeleitet ist und dass der Steg eine Breite in einem Bereich zwischen 0,1 mm und 2,0 mm, besonders bevorzugt von 0,5 mm, aufweist. Der Führungsbereich liegt dabei im montierten Zustand einem zylindrisch ausgeformten Zentrierabschnitt des Meißelschaftes gegenüber. Dabei ist der Durchmesser des Zentrierabschnitts derart gewählt, dass er sich mit einem vorgegebenen Spiel in der den Führungsbereich bildenden Bohrung bewegen kann. Die so gebildete Drehlagerung gewährleistet eine freie Drehbarkeit zwischen dem Führungsbereich des Stützelementes und dem Zentrierabschnitt des Meißelschaftes bei gleichzeitig geringem seitlichem Versatz quer zur Mittellängsachse des Meißels. Da sowohl der Führungsbereich wie auch der Zentrierabschnitt als durchgängige zylindrische Flächen mit gleich bleibenden Durchmessern ausgebildet sind können die freie Drehbarkeit behinderte Kanten und Übergänge vermieden werden. Dabei erstreckt sich die Führung über die komplette Länge des Führungsbereichs und des Zentrierabschnitts, was zu einer hohen mechanischen Belastbarkeit in diesem Bereich führt. Durch den Steg wird vermieden, dass die Materialstärke des Zentrieransatzes im Übergang zu dem Führungsbereich zu gering und damit empfindlich für mechanischen Beschädigungen wird. Gleichzeitig ist die Breite des Stegs so gering wie möglich zu wählen, um unter den gegebenen räumlichen Bedingungen und der bevorzugten Neigung der Zentrierfläche möglichst große Zentrierflächen und Führungsbereiche zu erhalten.A secure guidance of the support element on the drill collar can be achieved in that the support element forms a guide region, which is formed by a bore extending in the direction of the central longitudinal axis of the bit, that the guide region is transferred via a circumferential ridge in the centering and that Bridge a width in a range between 0.1 mm and 2.0 mm, more preferably 0.5 mm. The guide area is in the assembled state opposite a cylindrically shaped centering of the drill collar. In this case, the diameter of the centering section is selected such that it can move with a predetermined play in the bore forming the guide area. The rotary bearing thus formed ensures a free rotation between the guide region of the support element and the centering of the drill collar with low lateral offset transverse to the central longitudinal axis of the bit. Since both the guide region and the centering section are formed as continuous cylindrical surfaces with constant diameters, the free rotation of disabled edges and transitions can be avoided. The guide extends over the entire length of the guide region and the centering, resulting in a high mechanical strength in this area. By the web is avoided that the material thickness of the centering approach in the transition to the guide area is too small and thus sensitive to mechanical damage. At the same time, the width of the web is to be chosen as small as possible in order to obtain the largest possible centering surfaces and guide areas under the given spatial conditions and the preferred inclination of the centering surface.
Die Erfindung wird im Folgenden anhand eines in den Zeichnungen dargestellten Ausführungsbeispieles näher erläutert. Es zeigen:
- Figur 1
- in Seitenansicht einen Meißel in seiner Montagestellung an einem Meißelhalter,
- Figur 2
- ein in der
Figur 1 mit II. markiertes Detail, - Figur 3
- in perspektivischer Ansicht ein in den
Figuren 1 bis 2 gezeigtes Stützelement, - Figur 4
- in einer seitlichen Schnittdarstellung ein Ausschnitt eines in den
Figuren 1 bis 3 gezeigten Stützelementes.
- FIG. 1
- in side view a chisel in its mounting position on a chisel holder,
- FIG. 2
- an Indian
FIG. 1 detail marked with II. - FIG. 3
- in perspective view in the
FIGS. 1 to 2 shown supporting element, - FIG. 4
- in a lateral sectional view a section of a in the
FIGS. 1 to 3 shown support element.
Zwischen dem Meißelkopf 13 und dem Halteansatz 43 des Meißelhalters 40 ist ein Stützelement 30 vorgesehen.Between the
Der Meißelhalter 40 weist ein Basisteil 41 auf, an das ein unterseitig vorstehender Steckansatz 42 angeformt ist. Das Basisteil 41 trägt weiterhin den einteilig angeformten Halteansatz 43, in den als zylindrische Bohrung eine Meißelaufnahme 46 eingebracht ist. Dabei ist die Meißelaufnahme 46 als Durchgangsbohrung ausgeführt, die an ihren beiden längsseitigen Enden offen ist. Durch das dem Steckansatz 42 zugekehrte Ende der Meißelaufnahme 46 kann ein Austreibdorn (nicht dargestellt) eines Austreibwerkzeuges eingeführt werden. Dieser Austreibdorn wirkt dann auf das freie Ende des Meißelschaftes 11 ein. Das dem Steckansatz 42 abgewandte Ende der Meißelaufnahme 46 mündet in einem zylindrischen Abschnitt 44 des Halteansatzes 43. Am äußeren Umfang des Halteansatzes 43 sind Verschleißmarkierungen 45 in Form von umlaufenden Ringen vorgesehen.The
Entlang der Mittellängsachse weist das Stützelement 30 eine Bohrung auf, durch die ein Führungsbereich 36 zur Führung des Meißels 10 gebildet ist. In der Montagestellung ist der Zentrierabschnitt 12 des Meißelschaftes 11 dem Führungsbereich 36 zugeordnet. Auf diese Weise entsteht zwischen dem Führungsbereich 36 und dem Zentrierabschnitt 12 eine Drehlagerung. Hierbei ist darauf zu achten, dass der Außendurchmesser des zylindrischen Zentrierabschnittes 12 so auf den Innendurchmesser des Führungsbereiches 36 abgestimmt ist, dass eine freie Drehbarkeit zwischen dem Stützelement 30 und dem Zentrierabschnitt 12 erhalten bleibt. Das Spiel zwischen diesen beiden Bauteilen sollte so gewählt werden, dass ein möglichst geringer seitlicher Versatz (quer zur Mittellängsachse des Meißels (10)) entsteht. In dem Ausführungsbeispiel bleiben die Durchmesser des Führungsbereichs 36 und des Zentrierabschnittes über deren komplette axiale Länge jeweils gleich. Dadurch werden auch in diesem Bereich die Drehfähigkeit des Meißels 10 behindernde Kanten und Unstetigkeiten vermieden. Wie bereits zu
Der Meißelschaft 11 ist über die Befestigungshülse 20 in dem Halteansatz 43 des Meißelhalters 40 gehalten. An ihrem oberen Ende weist die Befestigungshülse 20 eine Fase 22 auf.The
Während des Betriebs kann sich der Meißel 10 um die Mittellängsachse drehen. Durch die freie Drehbarkeit ist gewährleistet, dass ich der Meißel 10 gleichmäßig über seinen gesamten Umfang abnutzt. Dabei dreht sich auch das lose aufgelegte und von dem Zentrierabschnitt 12 des Meißelschafts 11 gehaltene Stützelement 30, wodurch die Drehbarkeit des Meißels 10 insgesamt weiter verbessert wird. Durch die Drehung und die hohe mechanische Belastung des Meißels 10 erfolgt auch ein Verschleiß des Meißelhalters 40, hauptsächlich im oberen Abschnitt 44 des Halteansatzes 43. Durch die Belastung wird die Verschleißfläche 47 abgerieben. Der vorliegende Verschleiß des Halteansatzes 43 kann dabei über die in
Durch die Relativbewegung zwischen dem Stützelement 30 und dem Halteansatz 43 arbeitet sich die im Neuzustand ebene Verschleißfläche 47 des Halteansatzes 43 in die Nut 35 des Stützelementes 30 ein, so wie dies in
In der
In dem ausgebildeten Rand 31.2 auf der Oberseite des Stützelementes 30 sind als radial verlaufende Nuten ausgeführte Ausnehmungen 32 vorgesehen. Die Darstellung nach
In dem gezeigten Ausführungsbeispiel beträgt die Tiefe der Nut 35 gegenüber der Sitzfläche 34 einen Millimeter bei einem durch einen Pfeil markierten Radius 37 von 1,5 mm. Die Dicke des Stützelementes 30 beträgt zwischen der Stützfläche 31.1 und der Sitzfläche 33 fünf Millimeter. Dadurch ist eine ausreichende Materialstärke zwischen der Nut 35 und der Stützfläche 31.1 gewährleistet. Ein zweiter Radius 38 des Verrundungsabschnittes zwischen der Nut 35 und der Sitzfläche 33 beträgt einen Millimeter, wobei der Verrundungsabschnitt tangential in die Oberfläche der Nut 35 und der Sitzfläche 33 übergeht. Die Breite des Stegs beträgt in dem Ausführungsbeispiel 0,5 mm.In the embodiment shown, the depth of the
Claims (10)
dadurch gekennzeichnet,
dass im Übergangbereich von der Zentrierfläche (34.1) zu der Sitzfläche (33) eine umlaufende Nut (35) angeordnet ist und dass die Tiefe der Nut (35) gegenüber der Sitzfläche (33) größer oder gleich 0,3 mm ist.Chisel (10), in particular round shank chisel, with a chisel head (13) and a chisel shank (11), with a support element (30) having on its underside a projecting centering projection (34) and wherein the centering lug (34) extends to the center longitudinal axis of the Chisel (10) has inclined centering surface (34.1), which merges into a seat surface (33),
characterized,
that of the centering surface in the transition area (34.1) to the seat (33) has a circumferential groove (35) is arranged and that the depth of the groove (35) opposite the seat surface (33) is greater than or equal to 0.3 mm.
dadurch gekennzeichnet,
dass die Zentrierfläche (34.1) tangential in die Oberfläche der Nut (35) übergeht.Chisel (10) according to claim 1,
characterized,
that the centering surface (34.1) tangentially into the surface of the groove (35) passes.
dadurch gekennzeichnet,
dass die Nut (35) eine Tiefe zwischen 0,3 mm und 2 mm, vorzugsweise zwischen 0,5 mm und 1,5 mm, gegenüber der Sitzfläche (33) aufweist.Chisel (10) according to claim 1 or 2,
characterized,
that the groove (35) has a depth between 0.3 mm and 2 mm, preferably between 0.5 mm and 1.5 mm, with respect to the seat surface (33).
dadurch gekennzeichnet,
dass das Verhältnis der Dicke des die Nut aufnehmenden Teils des Stützelementes (30) zur Tiefe der Nut (35) mindestens 2 zu 1 beträgt und/oder dass die Materialdicke zwischen der Nut (35) und einer der Sitzfläche (33) gegenüberliegenden Stützfläche (31.1) mindestens 2 mm beträgt.A bit (10) according to any one of claims 1 to 3,
characterized,
in that the ratio of the thickness of the groove-receiving part of the support element (30) to the depth of the groove (35) is at least 2 to 1 and / or that the material thickness between the groove (35) and a support surface (31.1 ) is at least 2 mm.
dadurch gekennzeichnet,
dass das Stützelement (30) einen Durchmesser zwischen 38 mm und 95 mm aufweist.A bit (10) according to any one of claims 1 to 4,
characterized,
in that the support element (30) has a diameter between 38 mm and 95 mm.
dadurch gekennzeichnet,
dass die Nut (35) eine abgerundete, insbesondere kreisförmige Kontur aufweist und dass der Radius (37) der Kontur in einem Bereich zwischen 0,5 mm und 6 mm, besonders bevorzugt bei einem Radius (37) von 1,5mm, liegt.A bit (10) according to any one of claims 1 to 5,
characterized,
in that the groove (35) has a rounded, in particular circular contour, and that the radius (37) of the contour lies in a range between 0.5 mm and 6 mm, particularly preferably at a radius (37) of 1.5 mm.
dadurch gekennzeichnet,
dass die Oberfläche der Nut (35) über einen Verrundungsabschnitt oder eine Fase in die Oberfläche der Sitzfläche (33) übergeleitet ist.A bit (10) according to any one of claims 1 to 6,
characterized,
in that the surface of the groove (35) is transferred over a rounding section or a chamfer into the surface of the seat surface (33).
dadurch gekennzeichnet,
dass der Verrundungsabschnitt von einem Kreisbogenabschnitt mit einem zweiten Radius (38) in einem Bereich zwischen 0,2 mm und 25 mm, besonders bevorzugt von 1,0mm, gebildet ist.Chisel (10) according to claim 7,
characterized,
in that the rounding section is formed by a circular arc section having a second radius (38) in a range between 0.2 mm and 25 mm, particularly preferably 1.0 mm.
dadurch gekennzeichnet,
dass der Verrundungsabschnitt tangential in die Sitzfläche (33) übergeht.Chisel (10) according to claim 7 or 8,
characterized,
that the rounding section merges tangentially into the seat surface (33).
dadurch gekennzeichnet,
dass das Stützelement (30) einen Führungsbereich (36) bildet, der von einer sich in Richtung der Mittellängsachse des Meißels (10) erstreckenden Bohrung gebildet ist, dass der Führungsbereich (36) über einen umlaufenden Steg (39) in die Zentrierfläche (34.1) übergeleitet ist und dass der Steg (39) eine Breite in einem Bereich zwischen 0,1 mm und 2,0mm, besonders bevorzugt von 0,5mm, aufweist.A bit (10) according to any one of claims 1 to 9,
characterized,
in that the support element (30) forms a guide region (36), which is formed by a bore extending in the direction of the central longitudinal axis of the bit (10), in that the guide region (36) projects into the centering surface (34.1) via a circumferential web (39). is transferred and that the web (39) has a width in a range between 0.1 mm and 2.0 mm, more preferably of 0.5 mm.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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DE102014104040.6A DE102014104040A1 (en) | 2014-03-24 | 2014-03-24 | Chisel, in particular round shank chisel |
EP15709929.2A EP3122998B1 (en) | 2014-03-24 | 2015-03-13 | Pick, in particular a round shaft pick |
PCT/EP2015/055263 WO2015144450A1 (en) | 2014-03-24 | 2015-03-13 | Pick, in particular a round shaft pick |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
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EP15709929.2A Division-Into EP3122998B1 (en) | 2014-03-24 | 2015-03-13 | Pick, in particular a round shaft pick |
EP15709929.2A Division EP3122998B1 (en) | 2014-03-24 | 2015-03-13 | Pick, in particular a round shaft pick |
Publications (1)
Publication Number | Publication Date |
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EP3492696A1 true EP3492696A1 (en) | 2019-06-05 |
Family
ID=52682726
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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EP18211085.8A Withdrawn EP3492696A1 (en) | 2014-03-24 | 2015-03-13 | Chisel, in particular round shaft chisel |
EP15709929.2A Active EP3122998B1 (en) | 2014-03-24 | 2015-03-13 | Pick, in particular a round shaft pick |
Family Applications After (1)
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EP15709929.2A Active EP3122998B1 (en) | 2014-03-24 | 2015-03-13 | Pick, in particular a round shaft pick |
Country Status (8)
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US (2) | US10260341B2 (en) |
EP (2) | EP3492696A1 (en) |
CN (1) | CN106460508B (en) |
DE (1) | DE102014104040A1 (en) |
DK (1) | DK3122998T3 (en) |
ES (1) | ES2747709T3 (en) |
PL (1) | PL3122998T3 (en) |
WO (1) | WO2015144450A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016108808A1 (en) | 2016-05-12 | 2017-11-16 | Betek Gmbh & Co. Kg | Chisel with a support element with a spigot |
KR102540125B1 (en) * | 2017-08-30 | 2023-06-05 | 주성엔지니어링(주) | Substrate safe arrival device and apparatus for substrate processing apparatus |
DE102017123368A1 (en) | 2017-10-09 | 2019-04-11 | Wirtgen Gmbh | toolholders |
DE102018109151A1 (en) | 2018-04-17 | 2019-10-17 | Betek Gmbh & Co. Kg | Tooth |
DE102018109150A1 (en) | 2018-04-17 | 2019-10-17 | Betek Gmbh & Co. Kg | Tooth |
DE202018006276U1 (en) | 2018-04-17 | 2019-10-24 | Betek Gmbh & Co. Kg | Tooth |
AU201816544S (en) | 2018-08-01 | 2018-11-27 | Betek Gmbh & Co Kg | A chisel |
USD982633S1 (en) | 2021-03-11 | 2023-04-04 | Kennametal Inc. | Washerless cutting tool assembly |
US11585217B2 (en) | 2021-03-11 | 2023-02-21 | Kennametal Inc. | Washerless cutting tool assembly |
USD1015136S1 (en) | 2022-02-21 | 2024-02-20 | Kennametal Inc. | Washer for cutting tools |
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DE3701905C1 (en) | 1987-01-23 | 1988-09-15 | Betek Bergbau & Hartmetall | Attachment of a round shank chisel |
DE19856916C1 (en) * | 1998-12-10 | 2000-08-31 | Betek Bergbau & Hartmetall | Attachment for a round shank chisel |
US6113195A (en) * | 1998-10-08 | 2000-09-05 | Sandvik Ab | Rotatable cutting bit and bit washer therefor |
EP1427913A1 (en) * | 2001-09-10 | 2004-06-16 | Kennametal Inc. | Embossed washer |
DE202009014077U1 (en) * | 2009-10-19 | 2010-03-25 | Betek Bergbau- Und Hartmetalltechnik Karl-Heinz Simon Gmbh & Co. Kg | Chisel, in particular round shank chisel |
EP2639402A2 (en) | 2009-10-19 | 2013-09-18 | Betek GmbH & Co. KG | Round shaft bit with a retaining sleeve |
Family Cites Families (4)
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US4911504A (en) * | 1988-07-20 | 1990-03-27 | Kennametal Inc. | Cutter bit and tip |
US5725283A (en) * | 1996-04-16 | 1998-03-10 | Joy Mm Delaware, Inc. | Apparatus for holding a cutting bit |
DE202007010047U1 (en) * | 2007-07-02 | 2007-09-27 | Wirtgen Gmbh | Tool |
WO2011016765A1 (en) * | 2009-08-04 | 2011-02-10 | Sandvik Intellectual Property Ab | Non-rotating washer for tool pick, tool and block assembly, method to reduce erosive wear and material removal machine |
-
2014
- 2014-03-24 DE DE102014104040.6A patent/DE102014104040A1/en not_active Withdrawn
-
2015
- 2015-03-13 DK DK15709929.2T patent/DK3122998T3/en active
- 2015-03-13 WO PCT/EP2015/055263 patent/WO2015144450A1/en active Application Filing
- 2015-03-13 CN CN201580015184.1A patent/CN106460508B/en active Active
- 2015-03-13 ES ES15709929T patent/ES2747709T3/en active Active
- 2015-03-13 EP EP18211085.8A patent/EP3492696A1/en not_active Withdrawn
- 2015-03-13 EP EP15709929.2A patent/EP3122998B1/en active Active
- 2015-03-13 PL PL15709929T patent/PL3122998T3/en unknown
-
2016
- 2016-09-23 US US15/273,794 patent/US10260341B2/en active Active
-
2019
- 2019-02-28 US US16/288,529 patent/US10662770B2/en active Active
Patent Citations (7)
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DE3701905C1 (en) | 1987-01-23 | 1988-09-15 | Betek Bergbau & Hartmetall | Attachment of a round shank chisel |
US6113195A (en) * | 1998-10-08 | 2000-09-05 | Sandvik Ab | Rotatable cutting bit and bit washer therefor |
DE19856916C1 (en) * | 1998-12-10 | 2000-08-31 | Betek Bergbau & Hartmetall | Attachment for a round shank chisel |
EP1427913A1 (en) * | 2001-09-10 | 2004-06-16 | Kennametal Inc. | Embossed washer |
EP1427913B1 (en) | 2001-09-10 | 2006-02-15 | Kennametal Inc. | Embossed washer |
DE202009014077U1 (en) * | 2009-10-19 | 2010-03-25 | Betek Bergbau- Und Hartmetalltechnik Karl-Heinz Simon Gmbh & Co. Kg | Chisel, in particular round shank chisel |
EP2639402A2 (en) | 2009-10-19 | 2013-09-18 | Betek GmbH & Co. KG | Round shaft bit with a retaining sleeve |
Also Published As
Publication number | Publication date |
---|---|
WO2015144450A1 (en) | 2015-10-01 |
US20170030191A1 (en) | 2017-02-02 |
US10260341B2 (en) | 2019-04-16 |
CN106460508B (en) | 2019-11-26 |
US20190195069A1 (en) | 2019-06-27 |
US10662770B2 (en) | 2020-05-26 |
EP3122998A1 (en) | 2017-02-01 |
CN106460508A (en) | 2017-02-22 |
DE102014104040A1 (en) | 2015-09-24 |
EP3122998B1 (en) | 2019-07-10 |
PL3122998T3 (en) | 2020-03-31 |
DK3122998T3 (en) | 2019-10-07 |
ES2747709T3 (en) | 2020-03-11 |
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