EP1819902A1 - Chisel holder - Google Patents

Chisel holder

Info

Publication number
EP1819902A1
EP1819902A1 EP05798097A EP05798097A EP1819902A1 EP 1819902 A1 EP1819902 A1 EP 1819902A1 EP 05798097 A EP05798097 A EP 05798097A EP 05798097 A EP05798097 A EP 05798097A EP 1819902 A1 EP1819902 A1 EP 1819902A1
Authority
EP
European Patent Office
Prior art keywords
projection
chisel holder
connecting section
base part
section
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.)
Granted
Application number
EP05798097A
Other languages
German (de)
French (fr)
Other versions
EP1819902B1 (en
Inventor
Bernd Holl
Günter TEWES
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wirtgen GmbH
Original Assignee
Wirtgen GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Wirtgen GmbH filed Critical Wirtgen GmbH
Publication of EP1819902A1 publication Critical patent/EP1819902A1/en
Application granted granted Critical
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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

Definitions

  • the invention relates to a chisel holder for a road milling machine or the like with a base part which carries a holding attachment, the holding attachment having a chisel receptacle and with a projection being connected to the base part in front of the holding attachment in the tool feed direction of the chisel holder.
  • Such a bit holder is known from DE 43 22 401 C2.
  • the chisel holder is provided with a plug-in attachment with which it is held interchangeably in a plug-in receptacle of a base body.
  • the base body is attached to the outer circumference of a milling drum tube.
  • the plug attachment of the chisel holder is connected in one piece to a base part.
  • the base part carries a holding attachment on the side facing away from the plug-in attachment.
  • the holding attachment is provided with a bore into which a shaft chisel can be inserted in a known manner.
  • DE 37 01 905 C1 shows an example of a possible assembly situation.
  • the holding attachment of the chisel holder is provided with a cylindrical section into which circumferential wear marks formed as groove-like depressions cations are introduced.
  • the base part In the area in the tool feed direction in front of the holding attachment, the base part has an apron-shaped projection which covers a surface of the base body into which the plug receptacle for the plug attachment is inserted. This area of the base body is thus protected.
  • Chisel holders are also known in the prior art, which are fastened directly to the milling drum tube without a base body.
  • the chisel holders described above are used on road milling machines, but also on related earth-working machines, such as soil stabilizers, mining machines etc.
  • the power consumption of the machine changes depending on the nature of the surface to be worked. It can be seen that layers built up in layers, which tend to form clod-like chips when they are broken up, provide the tool with a high resistance. For example, such chip forms arise when cutting asphalt surfaces in which there is an inadequate adhesive bond between the cover layer (usually about 4 cm thick) and the binder layer.
  • the base part has a connecting section designed as a chipbreaker, which is molded onto the base part and which, at least in part, extends over the projection from the holding attachment.
  • connection of the holding attachment to the projection by means of the connecting section brings improved tool rigidity. This has a positive effect particularly in the case of exposed holding approaches and / or projections and leads to an increase in the service life.
  • the connecting section extends in the tool feed direction. In this way, a cutting geometry is created which offers the milled material a low penetration resistance.
  • a conceivable variant of the invention can be such that the connecting section forms a web section, that the retaining projection has an end section projecting over the base part and that the web width running transverse to the feed device is smaller than the dimension of the end section in this direction.
  • a further variant of the invention is characterized in that the end section of the holding attachment has a chisel receptacle designed as a bore, and that the end section has an annular shape around the central longitudinal axis of the Chisel receptacle revolving support surface has that the support surface lying radially outside extends up to the dimensional limits of a cylindrical region of the end section and that the connecting section is connected to the retaining attachment set back in relation to the support surface.
  • the cylindrical region of the holding projection forms a wear zone, as is described in principle in DE 199 02 766.8-24.
  • the disclosure content of this document is made the subject of this document.
  • the head of a shaft chisel is supported on the ring-shaped contact surface with the interposition of a wear protection disc.
  • the wear protection disc extends at least up to the dimensional limits of the bearing surface. This creates a wear system.
  • the wear protection disc rotates on the contact surface and continuously processes the cylindrical area.
  • the recessed arrangement of the connecting section stabilizes the retaining projection, but does not impair this wear system.
  • the connecting section has chip-guiding surfaces on both sides of the web section, which diverge starting from the web section in the direction of the base part, and that the connecting section is connected to the retaining attachment via fillet-shaped transition sections.
  • the service life of the bit holder can be optimized in that the connecting section is hardened and / or that at least one hard material element is applied to the connecting section.
  • a hard metal can be used as the hard material element.
  • a good chip-breaking geometry results from the fact that the connecting section has a conical or rounded cutting shape.
  • Fig. 1 shows a chisel holder in a perspective front view
  • Fig. 2 shows the bit holder of FIG. 1 in side view
  • FIG 3 shows a side view of a tool combination with the chisel holder shown in FIGS. 1 and 2, as well as a base body and a round shank chisel mounted in the chisel holder 1 shows a chisel holder with a base part 10.
  • the base part 10 has a support part with a support surface 11 facing downwards.
  • the support part merges into a projection 15 in the feed direction.
  • the projection 15 is at an angle to the support part.
  • a downwardly projecting plug-in projection 12 is molded onto the base part 10.
  • the chisel holder can be inserted into a plug receptacle of a base body 50 with the plug-in attachment 12.
  • the plug-in attachment 12 can then be clamped in the plug receptacle.
  • Front centering surfaces 13 and a rear clamping surface 12.1 of the plug-in attachment 12 shown in FIG. 2 serve as a support.
  • the chisel holder is supported with its support surface 11 on a counter surface of the base body 50.
  • the projection 15 covers a shoulder 51 of the base body 50 and thus protects it from the wear attack of the removed milling material.
  • a holding projection 30 is formed on the base part 10 of the bit holder via a connecting section 35.
  • the connecting section 35 can also have a truncated cone-shaped or coved geometry. At its end facing away from the connecting section 35, the retaining projection 30 ends in a projecting cylindrical end section 34.
  • two wear marks 34.1 are rotated concentrically around a bore (chisel receptacle 31) made in the holding projection 30.
  • the wear marks 34.1 thus form groove-shaped depressions which are arranged behind a bearing surface 33 which closes off the cylindrical end section 34.
  • a round shank chisel 40 with its shank section can be inserted into the chisel receptacle 31.
  • the round shank chisel then has a chisel head 41 on the shank section, which carries a chisel tip made of hard material.
  • the chisel head 41 is supported by a wear protection disk 42 on the support surface 33 of the holding projection 30.
  • the holding projection 30 forms a central connecting part 34.2 between the cylindrical end section 34 and the rounding section 35. This is connected in one piece to the projection 15 by means of a connecting section 20.
  • the connecting section 20 extends from the connecting part 34.2 in the tool feed direction. It has a flattened web section 21 which merges into the side surfaces 19 of the projection 15 via inclined rake faces 22.
  • the connecting section 20 runs continuously in the direction of a front end region of the projection 15.
  • the projection 15 is closed off in the end region by means of a rounding transition 16.
  • the inclined surfaces 14 adjoin the side surfaces 19 via rounding transitions 17.
  • the connecting section 20 is connected on the one hand for reasons of voltage optimization and on the other hand for improved chip discharge with rounded transition sections 18, 23 to the holding projection 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Road Repair (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

The invention relates to a chisel holder for a road milling machine or similar, comprising a base part (10) which bears a retaining shoulder (30), wherein said shoulder (30) comprises a chisel receiving element (31) and wherein a projection (15) is joined to the base part (10) in the direction of advancement of the chisel holder upstream from the retaining shoulder. In order to improve cutting performance, particularly when the elements that are to be milled exist in the form of large chips, the base part (10) is provided with a connecting section which is embodied as a chip breaker and which is formed on the base part (10) and which extends, from the retaining shoulder (30) onwards, over the projection (15) in at least partial manner.

Description

MeißelhalterChisel holder

Die Erfindung betrifft einen Meißelhalter für eine Straßenfräsmaschine oder dergleichen mit einem Basisteil, das einen Halteansatz trägt, wobei der Hal¬ teansatz eine Meißelaufnahme aufweist und wobei in Werkzeug- Vorschubrichtung des Meißelhalters vor dem Halteansatz ein Vorsprung an das Basisteil angeschlossen ist.The invention relates to a chisel holder for a road milling machine or the like with a base part which carries a holding attachment, the holding attachment having a chisel receptacle and with a projection being connected to the base part in front of the holding attachment in the tool feed direction of the chisel holder.

Ein derartiger Meißelhalter ist aus der DE 43 22 401 C2 bekannt. Der Mei¬ ßelhalter ist dabei mit einem Steckansatz versehen, mit dem er in einer Steckaufnahme eines Basiskörpers auswechselbar gehalten ist. Der Basis¬ körper ist auf dem Außen-Umfang eines Fräswalzenrohres befestigt. Der Steckansatz des Meißelhalters ist einteilig an ein Basisteil angeschlossen. Das Basisteil trägt auf der dem Steckansatz abgewandten Seite einen Hal¬ teansatz. Der Halteansatz ist mit einer Bohrung versehen, in die ein Schaftmeißel in bekannter Weise eingesetzt werden kann. Beispielsweise zeigt die DE 37 01 905 C1 exemplarisch eine mögliche Montagesituation.Such a bit holder is known from DE 43 22 401 C2. The chisel holder is provided with a plug-in attachment with which it is held interchangeably in a plug-in receptacle of a base body. The base body is attached to the outer circumference of a milling drum tube. The plug attachment of the chisel holder is connected in one piece to a base part. The base part carries a holding attachment on the side facing away from the plug-in attachment. The holding attachment is provided with a bore into which a shaft chisel can be inserted in a known manner. For example, DE 37 01 905 C1 shows an example of a possible assembly situation.

Der Halteansatz des Meißelhalters ist mit einem zylindrischen Abschnitt versehen, in den umlaufende, als nutartige Vertiefungen ausgebildete Verschleißmar- kierungen eingebracht sind. Im Bereich in Werkzeug-Vorschubrichtung vor dem Halteansatz weist das Basisteil einen schürzenförmig ausgebildeten Vorsprung auf, der eine Fläche des Basiskörpers, in die die Steckaufnahme für den Steckansatz eingebracht ist überdeckt. Damit ist dieser Bereich des Basiskörpers geschützt. Es sind im Stand der Technik auch Meißelhalter bekannt, die ohne ein Basiskörpers unmittelbar auf dem Fräswalzenrohr be¬ festigt sind.The holding attachment of the chisel holder is provided with a cylindrical section into which circumferential wear marks formed as groove-like depressions cations are introduced. In the area in the tool feed direction in front of the holding attachment, the base part has an apron-shaped projection which covers a surface of the base body into which the plug receptacle for the plug attachment is inserted. This area of the base body is thus protected. Chisel holders are also known in the prior art, which are fastened directly to the milling drum tube without a base body.

Die vorbeschriebenen Meißelhalter kommen auf Straßenfräsmaschinen, aber auch auf artverwandten Erdbearbeitungsmaschinen, wie Bodenstabili- sierer, Bergbaumaschinen etc. zum Einsatz. Abhängig von der Beschaffen¬ heit des zu bearbeitenden Untergrundes ändert sich die Leistungsaufnah¬ me der Maschine. Es zeigt sich, dass in Schichten aufgebaute Beläge, die beim Zerteilen zur Bildung von schollenartigen Spänen neigen, dem Werk¬ zeug einen hohen Widerstand entgegensetzen. Beispielsweise entstehen solche Spanformen beim Zerteilen von Asphaltflächen, bei denen zwischen der Deckschicht (meist ca. 4 cm stark) und der Binderschicht ein ungenü¬ gender Haftverbund besteht.The chisel holders described above are used on road milling machines, but also on related earth-working machines, such as soil stabilizers, mining machines etc. The power consumption of the machine changes depending on the nature of the surface to be worked. It can be seen that layers built up in layers, which tend to form clod-like chips when they are broken up, provide the tool with a high resistance. For example, such chip forms arise when cutting asphalt surfaces in which there is an inadequate adhesive bond between the cover layer (usually about 4 cm thick) and the binder layer.

Es ist Aufgabe der Erfindung, einen Meißelhalter der eingangs erwähnten Art zu schaffen, mit dem die Schneidleistung einer Straßenfräsmaschine oder dergleichen verbessert werden kann.It is an object of the invention to provide a chisel holder of the type mentioned in the introduction with which the cutting performance of a road milling machine or the like can be improved.

Diese Aufgabe wird dadurch gelöst, dass das Basisteil einen als Spanbre¬ cher ausgebildeten Verbindungsabschnitt aufweist, der an das Basisteil an¬ geformt ist und der sich ausgehend vom Halteansatz zumindest teilweise über den Vorsprung erstreckt. Mit dem Spanbrecher können die entstandenen Späne, insbesondere größere Schollen effektiv zerteilt werden. Damit wird der Schneidwiderstand den der Mei¬ ßelhalter dem Fräsgut entgegensetzt verringert, was zu einer Reduzierung der Leistungsaufnahme führt.This object is achieved in that the base part has a connecting section designed as a chipbreaker, which is molded onto the base part and which, at least in part, extends over the projection from the holding attachment. With the chip breaker, the resulting chips, especially larger clods, can be effectively cut up. The cutting resistance that the bit holder opposes to the milled material is thus reduced, which leads to a reduction in the power consumption.

Auf diese Weise lässt sich eine Verbesserung des Maschinen-Wirkungsgrades erzielen.In this way, an improvement in machine efficiency can be achieved.

Es hat sich weiterhin gezeigt, dass die Anbindung des Halteansatzes an den Vor¬ sprung mittels des Verbindungsabschnittes eine verbesserte Werkzeugsteifigkeit bringt. Dies wirkt sich insbesondere bei exponierten Halteansätzen und/oder Vor¬ sprünge positiv aus und führt zu einer Steigerung der Standzeit.It has also been shown that the connection of the holding attachment to the projection by means of the connecting section brings improved tool rigidity. This has a positive effect particularly in the case of exposed holding approaches and / or projections and leads to an increase in the service life.

Gemäß einer bevorzugten Erfindungsausgestaltung ist es vorgesehen, dass sich der Verbindungsabschnitt in Werkzeug-Vorschubrichtung erstreckt. Auf diese Weise entsteht eine Schneidgeometrie, die dem Fräsgut einen geringen Eindring¬ widerstand entgegensetzt.According to a preferred embodiment of the invention, it is provided that the connecting section extends in the tool feed direction. In this way, a cutting geometry is created which offers the milled material a low penetration resistance.

Eine denkbare Erfindungsvariante kann dergestalt sein, dass der Verbindungs¬ abschnitt einen Stegabschnitt bildet, dass der Halteansatz einen über das Basis¬ teil auskragenden End-Abschnitt aufweist und dass die quer zur Vorschu- beinrichtung verlaufende Stegbreite kleiner ist als die Abmessung des End- Abschnittes in dieser Richtung.A conceivable variant of the invention can be such that the connecting section forms a web section, that the retaining projection has an end section projecting over the base part and that the web width running transverse to the feed device is smaller than the dimension of the end section in this direction.

Eine weitere Erfindungsvariante ist dadurch gekennzeichnet, dass der End- Abschnitt des Halteansatzes eine als Bohrung ausgebildete Meißelaufnahme aufweist, dass der End-Abschnitt eine ringförmig um die Mittellängsachse der Meißelaufnahme umlaufende Auflagefläche aufweist, dass sich die Auflagefläche radial außen liegend bis zu den Abmessungsbegrenzungen eines zylindrischen Bereiches des End-Abschnittes erstreckt und dass der Verbindungsabschnitt in Achsrichtung zurückversetzt gegenüber der Auflagefläche an den Halteansatz angebunden ist.A further variant of the invention is characterized in that the end section of the holding attachment has a chisel receptacle designed as a bore, and that the end section has an annular shape around the central longitudinal axis of the Chisel receptacle revolving support surface has that the support surface lying radially outside extends up to the dimensional limits of a cylindrical region of the end section and that the connecting section is connected to the retaining attachment set back in relation to the support surface.

Der zylindrische Bereich des Halteansatzes bildet eine Verschleißzone, wie sie prinzipiell in der DE 199 02 766.8-24 beschrieben ist. Der Offenbarungsgehalt dieses Dokumentes wird diesbezüglich zum Gegenstand der vorliegenden Schrift gemacht.The cylindrical region of the holding projection forms a wear zone, as is described in principle in DE 199 02 766.8-24. In this regard, the disclosure content of this document is made the subject of this document.

Auf der ringförmigen Auflagefläche stützt sich der Kopf eines Schaftmeißels unter Zwischenlage einer Verschleißschutzscheibe ab. Die Verschleißschutzscheibe erstreckt sich zumindest bis zu den Abmessungsbegrenzungen der Auflagefläche. Damit wird ein Verschleißsystem geschaffen. Während des Werkzeugeinsatzes dreht die Verschleißschutzscheibe auf der Auflagefläche und arbeitet den zylindri¬ schen Bereich kontinuierlich ab. Durch die zurückversetzte Anordnung des Ver¬ bindungsabschnittes wird der Halteansatz stabilisiert, jedoch dieses Verschlei߬ system nicht beeinträchtigt.The head of a shaft chisel is supported on the ring-shaped contact surface with the interposition of a wear protection disc. The wear protection disc extends at least up to the dimensional limits of the bearing surface. This creates a wear system. During the use of the tool, the wear protection disc rotates on the contact surface and continuously processes the cylindrical area. The recessed arrangement of the connecting section stabilizes the retaining projection, but does not impair this wear system.

Um eine kontinuierliche Spanableitung sicherzustellen kann es erfindungsgemäß vorgesehen sein, dass der Verbindungsabschnitt beidseitig des Stegabschnittes Spanleitflächen aufweist, die ausgehend vom Stegabschnitt in Richtung zum Ba¬ sisteil hin divergieren und dass der Verbindungsabschnitt über hohlkehlförmige Übergangsabschnitte an den Halteansatz angeschlossen ist. Eine Optimierung der Schneidgeometrie des Meißelhalters ergibt sich dadurch, dass das Basisteil im Bereich des Vorsprungs seitlich von zwei Schrägflächen begrenzt ist, die in Werkzeug-Vorschubrichtung zueinander pfeilförmig an¬ geordnet sind und dass der Verbindungsabschnitt und die Schrägfläche in einem frontseitigen Endbereich des Vorsprunges auslaufen. Der frontseitige Erdbereich bildet einen verjüngten Abschnitt der besonders bei grobspanigem Fräsunter¬ grund einen guten Spanabtrag ermöglicht.In order to ensure continuous chip removal, it can be provided according to the invention that the connecting section has chip-guiding surfaces on both sides of the web section, which diverge starting from the web section in the direction of the base part, and that the connecting section is connected to the retaining attachment via fillet-shaped transition sections. An optimization of the cutting geometry of the bit holder results from the fact that the base part in the area of the projection is laterally delimited by two inclined surfaces which are arranged arrow-shaped to one another in the tool feed direction and that the connecting section and the inclined surface terminate in a front end region of the projection. The front area of the earth forms a tapered section, which enables good chip removal, particularly with coarse-chip milling substrates.

Die Standzeit des Meißelhalters kann dadurch optimiert werden, dass der Verbin¬ dungsabschnitt gehärtet ist und/oder dass auf dem Verbindungsabschnitt mindes¬ tens ein Hartstoffelement aufgebracht ist. Als Hartstoffelement kann beispielswei¬ se ein Hartmetall zum Einsatz kommen.The service life of the bit holder can be optimized in that the connecting section is hardened and / or that at least one hard material element is applied to the connecting section. For example, a hard metal can be used as the hard material element.

Eine gut spanbrechende Geometrie ergibt sich dadurch, dass der Verbindungs¬ abschnitt eine konische oder gerundete Schneidenform aufweist.A good chip-breaking geometry results from the fact that the connecting section has a conical or rounded cutting shape.

Die Erfindung wird im Folgenden anhand eines in den Zeichnungen dargestellten Ausführungsbeispieles näher erläutert. Es zeigen:The invention is explained below with reference to an embodiment shown in the drawings. Show it:

Fig. 1 einen Meißelhalter in perspektivischer Frontansicht undFig. 1 shows a chisel holder in a perspective front view

Fig. 2 den Meißelhalter gemäß Fig. 1 in Seitenansicht undFig. 2 shows the bit holder of FIG. 1 in side view

Fig. 3 in Seitenansicht eine Werkzeugkombination mit dem in den Fig. 1 und Fig. 2 gezeigten Meißelhalter sowie ei¬ nen Basiskörper und einem im Meißelhalter montierten Rundschaftmeißel Die Fig. 1 zeigt einen Meißelhalter mit einem Basisteil 10. Das Basisteil 10 besitzt ein Stützteil mit einer nach unten gewandten Stützfläche 11. Das Stützteil geht in Vorschubrichtung in einen Vorsprung 15 über. Dabei steht der Vorsprung 15 im Winkel zu dem Stützteil.3 shows a side view of a tool combination with the chisel holder shown in FIGS. 1 and 2, as well as a base body and a round shank chisel mounted in the chisel holder 1 shows a chisel holder with a base part 10. The base part 10 has a support part with a support surface 11 facing downwards. The support part merges into a projection 15 in the feed direction. The projection 15 is at an angle to the support part.

Im Übergangsbereich von dem Stützteil zum Vorsprung 15 ist an das Basisteil 10 ein nach unten abstehender Steckansatz 12 angeformt. Mit dem Steckansatz 12 kann der Meißelhalter in eine Steckaufnahme eines Basiskörpers 50 eingesteckt werden. In der Steckaufnahme kann der Steckansatz 12 dann verspannt werden.In the transition area from the support part to the projection 15, a downwardly projecting plug-in projection 12 is molded onto the base part 10. The chisel holder can be inserted into a plug receptacle of a base body 50 with the plug-in attachment 12. The plug-in attachment 12 can then be clamped in the plug receptacle.

Frontseitige Zentrierflächen 13 sowie eine in Fig. 2 gezeigte rückseitige Spann¬ fläche 12.1 des Steckansatzes 12 dienen dabei als Abstützung. Im montierten Zustand stützt sich der Meißelhalter mit seiner Stützfläche 11 auf einer Gegen¬ fläche des Basiskörpers 50 ab. Der Vorsprung 15 überdeckt einen Absatz 51 des Basiskörpers 50 und schützt diesen so vor dem Verschleißangriff des abgetrage¬ nen Fräsgutes. An das Basisteil 10 des Meißelhalters ist ein Halteansatz 30 über einen Verbindungsabschnitt 35 angeformt. Der Verbindungsabschnitt 35 kann auch eine stumpfkegelförmige oder hohlkehlförmige Geometrie aufweisen. An seinem dem Verbindungsabschnitt 35 abgewandten Ende läuft der Halteansatz 30 in einem auskragendem zylindrischen End-Abschnitt 34 aus. In diesen End- Abschnitt 34 sind zwei konzentrisch um eine in den Halteansatz 30 eingebrachte Bohrung (Meißelaufnahme 31) umlaufende Verschleißmarkierungen 34.1 einge¬ dreht. Die Verschleißmarkierungen 34.1 bilden somit nutförmige Vertiefungen, die hinter einer den zylindrischen End-Abschnitt 34 abschließenden Auflagefläche 33 angeordnet sind. Wie die Fig. 3 erkennen lässt, kann in die Meißelaufnahme 31 ein Rundschaft¬ meißel 40 mit seinem Schaftabschnitt eingesetzt werden. Der Rundschaftmeißel weist an dem Schaftabschnitt anschließend einen Meißelkopf 41 auf, der eine Meißelspitze aus Hartwerkstoff trägt. Der Meißelkopf 41 stützt sich unter Zwi¬ schenlage einer Verschleißschutzscheibe 42 auf der Auflagefläche 33 des Halte¬ ansatzes 30 ab.Front centering surfaces 13 and a rear clamping surface 12.1 of the plug-in attachment 12 shown in FIG. 2 serve as a support. In the assembled state, the chisel holder is supported with its support surface 11 on a counter surface of the base body 50. The projection 15 covers a shoulder 51 of the base body 50 and thus protects it from the wear attack of the removed milling material. A holding projection 30 is formed on the base part 10 of the bit holder via a connecting section 35. The connecting section 35 can also have a truncated cone-shaped or coved geometry. At its end facing away from the connecting section 35, the retaining projection 30 ends in a projecting cylindrical end section 34. In this end section 34, two wear marks 34.1 are rotated concentrically around a bore (chisel receptacle 31) made in the holding projection 30. The wear marks 34.1 thus form groove-shaped depressions which are arranged behind a bearing surface 33 which closes off the cylindrical end section 34. As can be seen in FIG. 3, a round shank chisel 40 with its shank section can be inserted into the chisel receptacle 31. The round shank chisel then has a chisel head 41 on the shank section, which carries a chisel tip made of hard material. The chisel head 41 is supported by a wear protection disk 42 on the support surface 33 of the holding projection 30.

Wie die Fig. 2 deutlich erkennen lässt, bildet der Halteansatz 30 zwischen dem zylindrischen End-Abschnitt 34 und dem Verrundungsabschnitt 35 einen mittleren Verbindungsteil 34.2. Dieser ist mittels eines Verbindungsabschnittes 20 an den Vorsprung 15 einstückig angeschlossen.As can be clearly seen in FIG. 2, the holding projection 30 forms a central connecting part 34.2 between the cylindrical end section 34 and the rounding section 35. This is connected in one piece to the projection 15 by means of a connecting section 20.

Der Verbindungsabschnitt 20 erstreckt sich dabei ausgehend vom Verbindungsteil 34.2 in Werkzeug-Vorschubrichtung. Er weist einen abgeflachten Stegabschnitt 21 auf, der über geneigte Spanflächen 22 in die Seitenflächen 19 des Vorsprun¬ ges 15 übergeht. Der Verbindungsabschnitt 20 läuft kontinuierlich in Richtung zu einem frontseitigen Endbereich des Vorsprunges 15 hin aus.The connecting section 20 extends from the connecting part 34.2 in the tool feed direction. It has a flattened web section 21 which merges into the side surfaces 19 of the projection 15 via inclined rake faces 22. The connecting section 20 runs continuously in the direction of a front end region of the projection 15.

Zwei den Vorsprung 15 seitlich begrenzende Schrägflächen 14 laufen ebenfalls in diesem Bereich aus, so dass sich mit dem Verbindungsabschnitt 20 und den Schrägflächen 14 eine pfeilförmige Kontur ergibt.Two inclined surfaces 14 which laterally delimit the projection 15 likewise run out in this area, so that an arrow-shaped contour results with the connecting section 20 and the inclined surfaces 14.

Der Vorsprung 15 ist in dem Endbereich mittels eines Verrundungsüberganges 16 abgeschlossen. Die Schrägflächen 14 schließen sich über Verrundungs- übergänge 17 die Seitenflächen 19 an. Der Verbindungsabschnitt 20 ist aus Gründen der Spannungsoptimierung einerseits und zum verbesserten Span- abfluss andererseits mit verrundeten Übergangsabschnitten 18,23 an den Halte¬ ansatz 30 angeschlossen. The projection 15 is closed off in the end region by means of a rounding transition 16. The inclined surfaces 14 adjoin the side surfaces 19 via rounding transitions 17. The connecting section 20 is connected on the one hand for reasons of voltage optimization and on the other hand for improved chip discharge with rounded transition sections 18, 23 to the holding projection 30.

Claims

Patentansprüche Claims 1. Meißelhalter für eine Straßenfräsmaschine oder dergleichen mit einem Ba¬ sisteil (10), das einen Halteansatz (30) trägt, wobei der Halteansatz (30) eine Meißelaufnahme (31) aufweist und wobei in Werkzeug-Vor¬ schubrichtung des Meißelhalters vor dem Halteansatz (30) ein Vorsprung (15) an das Basisteil (10) angeschlossen ist, dadurch gekennzeichnet, dass das Basisteil (10) einen als Spanbrecher ausgebildeten Verbindungs¬ abschnitt (20) aufweist, der an das Basisteil (10) angeformt ist und der sich ausgehend vom Halteansatz (30) zumindest teilweise über den Vorsprung (15) erstreckt.1. Chisel holder for a road milling machine or the like with a base part (10) which carries a holding attachment (30), the holding attachment (30) having a chisel holder (31) and in the tool feed direction of the chisel holder in front of the holding attachment (30) a projection (15) is connected to the base part (10), characterized in that the base part (10) has a connecting section (20) designed as a chip breaker, which is molded onto the base part (10) and which is starting from the retaining projection (30) at least partially extends over the projection (15). 2. Meißelhalter nach Anspruch 1, dadurch gekennzeichnet, dass sich der Verbindungsabschnitt (20) in Werkzeug-Vorschubrichtung erstreckt.2. Chisel holder according to claim 1, characterized in that the connecting section (20) extends in the tool feed direction. 3. Meißelhalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Verbindungsabschnitt (20) einen Stegabschnitt (21) bildet, dass der Halteansatz (30) einen über das Basisteil (10) auskragenden3. Chisel holder according to claim 1 or 2, characterized in that the connecting section (20) forms a web section (21), that the retaining projection (30) projecting over the base part (10) End-Abschnitt (34) aufweist und dass die quer zur Vorschubeinrichtung verlaufende Stegbreite kleiner ist als die Abmessung des End-Abschnittes (34) in dieser Richtung. End section (34) and that the web width transverse to the feed device is smaller than the dimension of the end section (34) in this direction. 4. Meißelhalter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der End-Abschnitt (34) des Halteansatzes (30) eine als Bohrung aus¬ gebildete Meißelaufnahme (31) aufweist, dass der End-Abschnitt (34) eine ringförmig um die Mittellängsachse der Meißelaufnahme (31) umlaufende Auflagefläche (33) aufweist, dass sich die Auflagefläche (33) radial außen liegend bis zu den Abmes¬ sungsbegrenzungen eines zylindrischen Bereiches des End-Abschnittes (34) erstreckt und dass der Verbindungsabschnitt (20) in Achsrichtung zurückversetzt gegen¬ über der Auflagefläche (33) an den Halteansatz (30) angebunden ist.4. Chisel holder according to one of claims 1 to 3, characterized in that the end section (34) of the holding projection (30) has a chisel receptacle (31) formed as a bore, that the end section (34) has an annular shape The central longitudinal axis of the chisel receptacle (31) has a circumferential bearing surface (33) such that the bearing surface (33) extends radially outward to the dimensional limits of a cylindrical region of the end section (34) and that the connecting section (20) extends in the axial direction set back from the support surface (33) is connected to the retaining projection (30). 5. Meißelhalter nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass der Verbindungsabschnitt (20) beidseitig des Stegabschnittes (21) Spanleitflächen (22) aufweist, die ausgehend vom Stegabschnitt (21) in Richtung zum Basisteil (10) hin divergieren.5. Chisel holder according to claim 3 or 4, characterized in that the connecting section (20) on both sides of the web section (21) has chip guide surfaces (22) which, starting from the web section (21) diverge towards the base part (10). 6. Meißelhalter nach Anspruch 1 bis 5, dadurch gekennzeichnet, dass der Verbindungsabschnitt (20) über hohlkehlförmige Übergangs¬ abschnitte (18) an den Halteansatz (30) angeschlossen ist.6. Chisel holder according to claim 1 to 5, characterized in that the connecting section (20) via fillet-shaped transition sections (18) is connected to the holding projection (30). 7. Meißelhalter nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Basisteil (10) im Bereich des Vorsprungs (15) seitlich von zwei Schrägflächen (14) begrenzt ist, die in Werkzeug-Vorschubrichtung zuein¬ ander pfeilförmig angeordnet sind und dass der Verbindungsabschnitt (20) und die Schrägfläche (14) in einem frontseitigen Endbereich des Vorsprunges (15) auslaufen.7. Chisel holder according to one of claims 1 to 6, characterized in that the base part (10) in the region of the projection (15) is laterally delimited by two inclined surfaces (14) which are arranged arrow-shaped to one another in the tool feed direction and that the connecting section (20) and the inclined surface (14) end in a front end region of the projection (15). 8. Meißelhalter nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Verbindungsabschnitt (20) gehärtet ist.8. Chisel holder according to one of claims 1 to 7, characterized in that the connecting section (20) is hardened. 9. Meißelhalter nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass auf dem Verbindungsabschnitt (20) mindestens ein Hartstoffelement aufgebracht ist.9. Chisel holder according to one of claims 1 to 8, characterized in that at least one hard material element is applied to the connecting section (20). 10. Meißelhalter nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass der Verbindungsabschnitt (20) eine konische oder gerundete Schnei¬ denform aufweist. 10. Chisel holder according to one of claims 1 to 9, characterized in that the connecting section (20) has a conical or rounded cutting shape.
EP05798097.1A 2004-11-26 2005-10-08 Chisel holder Expired - Lifetime EP1819902B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004057302A DE102004057302B4 (en) 2004-11-26 2004-11-26 toolholders
PCT/EP2005/010865 WO2006056269A1 (en) 2004-11-26 2005-10-08 Chisel holder

Publications (2)

Publication Number Publication Date
EP1819902A1 true EP1819902A1 (en) 2007-08-22
EP1819902B1 EP1819902B1 (en) 2018-12-12

Family

ID=35457998

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05798097.1A Expired - Lifetime EP1819902B1 (en) 2004-11-26 2005-10-08 Chisel holder

Country Status (11)

Country Link
US (1) US7300115B2 (en)
EP (1) EP1819902B1 (en)
JP (1) JP4728341B2 (en)
KR (1) KR100915603B1 (en)
CN (1) CN101175895B (en)
AU (1) AU2005309142B2 (en)
BR (1) BRPI0518252B1 (en)
DE (1) DE102004057302B4 (en)
RU (1) RU2347907C1 (en)
TR (1) TR201900655T4 (en)
WO (1) WO2006056269A1 (en)

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DE102004057302B4 (en) 2011-01-13
JP4728341B2 (en) 2011-07-20
EP1819902B1 (en) 2018-12-12
WO2006056269A1 (en) 2006-06-01
CN101175895B (en) 2010-05-05
US7300115B2 (en) 2007-11-27
JP2008530393A (en) 2008-08-07
KR20070086512A (en) 2007-08-27
AU2005309142A1 (en) 2006-06-01
BRPI0518252B1 (en) 2017-05-09
RU2347907C1 (en) 2009-02-27
BRPI0518252A2 (en) 2008-11-11
KR100915603B1 (en) 2009-09-07
US20060119165A1 (en) 2006-06-08
AU2005309142B2 (en) 2011-06-30
RU2007123705A (en) 2009-01-10
TR201900655T4 (en) 2019-02-21
DE102004057302A1 (en) 2006-06-01
CN101175895A (en) 2008-05-07

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