EP1159511A1 - Chisel holder changing system - Google Patents

Chisel holder changing system

Info

Publication number
EP1159511A1
EP1159511A1 EP00904946A EP00904946A EP1159511A1 EP 1159511 A1 EP1159511 A1 EP 1159511A1 EP 00904946 A EP00904946 A EP 00904946A EP 00904946 A EP00904946 A EP 00904946A EP 1159511 A1 EP1159511 A1 EP 1159511A1
Authority
EP
European Patent Office
Prior art keywords
chisel
holder
base part
toothing
chisel holder
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
EP00904946A
Other languages
German (de)
French (fr)
Other versions
EP1159511B1 (en
Inventor
Bernd Holl
Dieter Simons
Günter HÄHN
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
Application filed by Wirtgen GmbH filed Critical Wirtgen GmbH
Publication of EP1159511A1 publication Critical patent/EP1159511A1/en
Application granted granted Critical
Publication of EP1159511B1 publication Critical patent/EP1159511B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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
    • E21C35/188—Mining picks; Holders therefor characterised by adaptations to use an extraction tool
    • 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
    • E21C35/19—Means for fixing picks or holders
    • 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
    • E21C35/19—Means for fixing picks or holders
    • E21C35/191—Means for fixing picks or holders for fixing holders
    • 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
    • E21C35/19—Means for fixing picks or holders
    • E21C35/193—Means for fixing picks or holders using bolts as main fixing elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32262—At selected angle

Definitions

  • the invention relates to a bit holder changing system for a road milling machine, a cutting machine or the like with a base part to which a bit holder is exchangeably fastened by means of a connecting mechanism, the bit holder interchangeably receiving at least one bit, the central longitudinal axis of the bit being smaller than the working surface in the working angle is set as 90 °.
  • the bit holder changing system has a base part, which protrudes welded onto a surface of a roller body.
  • the base part has a plug-in receptacle into which a plug insert of the chisel holder can be inserted.
  • the chisel holder is provided with a mounting hole into which a chisel shank of a round shank chisel is inserted.
  • the chisel holder can be clamped to the base part using a fastening screw.
  • the central longitudinal axis (axis of rotation) of the round shank bit is inclined with respect to the surface to be machined.
  • This object is achieved in that the chisel holder can be fixed to the base part in two or more attachment positions, and in that the central longitudinal axis of the chisel is inclined by different working angles in the different attachment positions.
  • the chisel holder is supported on a contact surface of the base part by means of a support surface, and that the chisel holder can be displaced relative to the contact surface on its support surface in order to achieve the different mounting positions.
  • the bit holder can be adjusted with respect to the base part.
  • certain, preferably used, working angles are assigned to the individual grid points. In the case of a road milling machine, these are, for example, the angles 35 °, 40 ° and 45 °.
  • the rasterized adjustment can be achieved, for example, in that the chisel holder is provided with a toothing that is in engagement with a counter-toothing of the base part, that the toothing and the counter-toothing have flat support flanks that extend transversely to the direction of adjustment of the bit holder relative to the base part.
  • the forces occurring during operation can be safely diverted into the base part via the support flanks.
  • the tool holder changing system is usually applied to a roller-shaped base body which can be moved about an axis of rotation.
  • a tool holder changing system is characterized in that the counter-toothing of the base part has two partial teeth and that the partial teeth for absorbing transverse forces in the direction transverse to the feed direction of the bit are inclined.
  • An alternative design variant of a bit holder change system can be realized, for example, in that the base part has a contact part which is equipped with a plurality of concentrically arranged tooth elements of the counter-toothing, that the bit holder carries a clamping plate which is provided with a toothing adapted to the counter-toothing, and that the bit holder is rotatable relative to the base part about an adjustment axis which is arranged transversely to the direction of advance of the bit.
  • Such a connection mechanism can also be designed as a Hirth tooth system. Due to the large number of tooth elements, extremely high forces can be transmitted via this connection mechanism.
  • the chisel holder has a base body which carries a holding attachment for receiving the chisel that the base body has an elongated hole which is aligned with a threaded receptacle of the base part, that a fastening screw can be inserted into the elongated hole and screwed into the threaded receptacle, and that the bit holder is adjustable when the fastening screw is loosened.
  • the screw head of the fastening screw should be protected in a recess that widens after the elongated hole. A particularly good and firm bracing of the screw head with the chisel holder can be achieved if the screw head is designed as a lens screw head.
  • the chisel holder In the event of wear or in the case of impermissibly high loads, it can happen that a bit holder is damaged.
  • the chisel holder carries a holding attachment on a base body, that the holding attachment has a receiving bore for a chisel shaft of the chisel, and that the holding attachment with the base body over a predetermined breaking point is connected.
  • FIG. 1A and 1B show a tool holder changing system in two views and in a first setting position
  • Fig. 4 shows an embodiment variant of a base part for a
  • FIG. 5 in side view a further embodiment variant of a tool holder changing system.
  • 1 shows a tool holder changing system which has a base part 40 and a tool holder 20.
  • the base part 40 has a lower connection surface 41 with which it can be placed on a cylindrical base body, for example a road milling machine.
  • the connection to the cylindrical base body is made by means of weld seams.
  • the base part 40 On its side facing upward, the base part 40 is provided with an arcuate contact surface.
  • the contact surface has counter teeth 42.
  • the individual teeth of this counter-toothing 42 are triangular in cross-section and thus form two contact flanks.
  • the teeth of the counter toothing 42 extend over the entire width of the base part 40.
  • a thread receiver 43 is incorporated into the contact surface of the base part 40 over half the width of the teeth.
  • the thread receptacle is arranged so that it is incorporated into the base part to take up as much space as possible and thereby provides a sufficient thread length for a fastening screw.
  • the thread receptacle 43 is therefore introduced obliquely into the contact surface.
  • a low overall height of the base part 40 can also be achieved. This has particular advantages, since the entire structure of the bit holder changing system can therefore be kept small.
  • the chisel holder 20 can be attached to the base part 40.
  • the chisel holder 20 has a base body 25 which is provided with an elongated hole 28.
  • the elongated hole 28 widens towards the outside of the base body 25 by means of a recess 27.
  • the fastening screw which in the present case represents the connecting mechanism 30, can be inserted through the elongated hole 28 and screwed into the threaded receptacle 43.
  • the screw head 32 is then protected in the recess 27. When the fastening screw is tightened, the screw head 32 is in the transition area between
  • Chisel holder 20 can be pressed against the base part 40 and over which large forces can be transmitted during work.
  • the base body 25 has a protruding retaining lug 21, into which a receiving bore 22 is machined.
  • the central longitudinal axis of the receiving bore 27 is at right angles to the arcuate contact surface of the base part 40.
  • An expulsion channel 23 is drilled into the tool holder 20 from the rear of the tool holder changing system.
  • the drive-out channel 23 crosses the receiving bore 22.
  • a chisel 10 can be inserted into the receiving bore 22.
  • the chisel 10 has a chisel head 17 which carries a chisel tip 11.
  • the chisel tip 1 1 is designed as a hard metal element.
  • a chisel shaft adjoins the chisel head 17, on which a clamping sleeve 12 is fitted.
  • the clamping sleeve 12 is spread out in the receiving bore 22. At the same time, the clamping sleeve 12 holds the chisel shaft of the chisel 10 and thus prevents it from falling out. In the inserted state, the chisel head 17 rests on a wear protection disk 14. The wear protection disc 14 is supported around the receiving bore 22 on the bit holder 20. The chisel 10 can be pulled out of the receiving bore 22 in two different ways. On the one hand, an expulsion mandrel can be inserted into the expulsion channel 23 through an inlet opening 24 until it comes to rest on an end face 13 of the chisel shaft.
  • the chisel shank can then be driven out of the receiving bore 22 with a hammer blow. Furthermore, a circumferential extraction groove 15 is introduced into the chisel head 17, into which an extraction tool can be inserted.
  • the chisel 10 can then be levered out of the receiving bore 22 by means of a lever.
  • 1 A and 1 B show that the fastening screw is arranged centrally in the slot 28. This results in a working angle a at which the central longitudinal axis 16 of the chisel 10 is set in relation to the surface to be machined.
  • the complementary angle is shown in FIG. 1A with a '. If this working angle a is now to be changed, then only the fastening screw has to be loosened.
  • the bit holder 20 can then be displaced relative to the base part 40.
  • the fastening screw is then tightened again, so that the toothing 26 can be braced with the counter toothing 42.
  • FIGS. 2A and 2B Such a changed setting position is shown in FIGS. 2A and 2B.
  • the working angle a is now 45 ° (compared to the previous setting of 40 °). 2A and 2B, the fastening screw and the screw head 32 abut one end of the elongated hole 28 and the recess 27, respectively.
  • FIGS. 3A and 3B The other maximum working angle a is illustrated in FIGS. 3A and 3B.
  • the fastening screw and the screw head 32 abut against the other end of the elongated hole 28 or the recess 27. 3A and 3B, a working angle a of 35 ° is realized. It can be seen that regardless of the setting position of the chisel holder 20, the central longitudinal axis 16 of the chisel 10 is always arranged normal to the contact surface of the base part 40. This enables optimal derivation of the forces generated during work.
  • Screw head 32 of the fastening screw selected a cylindrical geometry.
  • a lens head geometry can also be selected to improve the contact pressure.
  • FIG. 4 A possible embodiment of a base part 40 is shown in perspective in FIG. 4.
  • the opposite toothing 42 divided into two partial teeth 42.1 and 42.2.
  • the two partial teeth 42.1 and 42.2 are inclined in the direction transverse to the feed direction of the round shank chisel 10.
  • This forms a toothed strip-shaped edge 42.3 in the transition area between the two partial teeth 42.1, 42.2.
  • the toothing 26 of the bit holder 20 is also designed. As a result of this configuration, the forces acting transversely to the direction of advance of the chisel can be positively transmitted into the base part 40 via the teeth 26 and the counter teeth 42.
  • FIG. 5 shows a further embodiment variant of a bit holder changing system.
  • the base part 40 is placed with its connecting surface 41 on the surface of a roller body 50.
  • the base part 40 has an abutment part 44.
  • This abutment part 44 is provided with counter teeth 42 in the form of a star.
  • the individual teeth of the counter toothing 42 are directed radially outwards from a common center.
  • the central longitudinal axis of the fastening screw, of which the screw head 32 can be seen in FIG. 5, is also arranged in this center.
  • a clamping plate 25.1 of the base body 25 of the bit holder 20 can be placed on the system part 44.
  • the clamping plate 2.5 is provided with a toothing 26 which is adapted to the counter toothing 42 of the base part 40.
  • the toothed connection shown in FIG. 5 is usually referred to as a Hirth toothing.
  • the teeth 26 are braced with the counter teeth 42 by means of the fastening screw.
  • the fastening screw is loosened, the chisel holder 20 can be gradually offset relative to the base part 40 in accordance with the tooth pitch. This also changes the working angle a of the chisel 10.
  • the working angle a can be changed quickly and without great effort.
  • the removal tool for example a road milling machine
  • the removal tool can be easily adapted to different applications. If, for example, a large working angle ⁇ is selected, a fine surface roughness can be generated in road milling machines. Small working angles a, on the other hand, lead to a large overburden volume with a high roughness depth.

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  • 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)
  • Road Repair (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Materials For Medical Uses (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

A chisel-holder changing system for a road milling machine, a coal cutting machine or the like to which a chisel-holder is fastened in an exchangeable manner by means of a connecting mechanism. The chisel-holder accommodates at least one chisel that can be exchanged. The middle longitudinal axis of the chisel is set at an operating angle of less than 90° with respect to the surface to be worked. In order to be able to obtain varied removal results using such a chisel-holder changing system, the chisel-holder can be fixed in two or more configuring positions to the base part and in different attachment positions of the chisel, the middle longitudinal axis of the chisel is slanted at various working angles.

Description

MeißelhalterwechselsystemChisel holder changing system
Die Erfindung betrifft ein Meißelhalterwechselsystem für eine Straßenfräse, eine Schrämmaschine oder dergleichen mit einem Basisteil, an dem ein Meißelhalter mittels einer Verbindungsmechanik auswechselbar befestigt ist, wobei der Meißelhalter wenigstens einen Meißel auswechselbar aufnimmt, wobei die Mittellängsachse des Meißels gegenüber der zu bearbeitenden Oberfläche im Arbeitswinkel kleiner als 90° angestellt ist.The invention relates to a bit holder changing system for a road milling machine, a cutting machine or the like with a base part to which a bit holder is exchangeably fastened by means of a connecting mechanism, the bit holder interchangeably receiving at least one bit, the central longitudinal axis of the bit being smaller than the working surface in the working angle is set as 90 °.
Ein solches Meißelhalterwechselsystem ist aus der DE 43 22 401 C2 bekannt. Das Meißelhalterwechselsystem weist ein Basisteil auf, das abstehend auf einer Oberfläche eines Walzenkörpes aufgeschweißt. Das Basisteil besitzt eine Steckaufnahme in die ein Steckeinsatz des Meißelhalters einsetzbar ist. Der Meißel- halter ist mit einer Aufnahmebohrung versehen, in die ein Meißelschaft eines Rundschaftmeißels eingesetzt ist. Der Meißelhalter kann mit dem Basisteil mittels einer Befestigungsschraube verspannt werden. Im montierten Zustand ist die Mittellängsachse (Rotationsachse) des Rundschaftmeißels gegenüber der zu bearbeitenden Oberfläche geneigt.Such a tool holder changing system is known from DE 43 22 401 C2. The bit holder changing system has a base part, which protrudes welded onto a surface of a roller body. The base part has a plug-in receptacle into which a plug insert of the chisel holder can be inserted. The chisel holder is provided with a mounting hole into which a chisel shank of a round shank chisel is inserted. The chisel holder can be clamped to the base part using a fastening screw. When assembled, the central longitudinal axis (axis of rotation) of the round shank bit is inclined with respect to the surface to be machined.
Es ist Aufgabe der Erfindung ein Meißelhalterwechselsystem der eingangs erwähnten Art zu schaffen, mit dem sich unterschiedliche Abtragergebnisse hinsichtlich der Oberflächenqualität der bearbeiteten Oberfläche ergeben. Diese Aufgabe wird dadurch gelöst, daß der Meißelhalter in zwei oder mehreren Anbaupositionen an dem Basisteil festlegbar ist, und daß die Mittellängsachse des Meißels in den verschiedenen Anbaupositionen um unterschiedliche Arbeitswinkel geneigt ist.It is an object of the invention to provide a tool holder changing system of the type mentioned at the beginning, with which different removal results result with regard to the surface quality of the processed surface. This object is achieved in that the chisel holder can be fixed to the base part in two or more attachment positions, and in that the central longitudinal axis of the chisel is inclined by different working angles in the different attachment positions.
Infolge der unterschiedlichen Anstellungen des Meißels lassen sich mit einem einzigen Meißelhalterwechselsystem unterschiedliche Abtragergebnisse reali- sieren. Beispielsweise kann bei einer Straßenfräse durch die Variation des Ar- beitswinkles entweder ein Grob- oder Feinfräsen erfolgen.As a result of the different positions of the bit, different removal results can be achieved with a single bit holder changing system. For example, with a road milling machine, either rough or fine milling can be carried out by varying the working angle.
Nach einer bevorzugten Ausgestaltungsvariante der Erfindung ist es vorgesehen, daß der Meißelhalter mittels einer Stützfläche an einer Anlagefläche des Basisteils abgestützt ist, und daß der Meißelhalter zur Verwirklichung der unterschiedlichen Anbaupositionen an seiner Stützfläche gegenüber der Anlagefläche versetzbar ist.According to a preferred embodiment variant of the invention, it is provided that the chisel holder is supported on a contact surface of the base part by means of a support surface, and that the chisel holder can be displaced relative to the contact surface on its support surface in order to achieve the different mounting positions.
Um einen schnellen Wechsel der Meißelpositionierung erreichen zu können, ist es denkbar, daß der Meißelhalter gegenüber dem Basisteil gerastert verstellbar ist. Insbesondere kann es dabei vorgesehen sein, daß den einzelnen Rasterpunkten bestimmte, bevorzugt eingesetzte Arbeitswinkel zugeordnet sind. Bei einer Straßenfräse sind dies beispielsweise die Winkel 35°, 40° und 45°.In order to be able to achieve a quick change of the bit positioning, it is conceivable that the bit holder can be adjusted with respect to the base part. In particular, it can be provided that certain, preferably used, working angles are assigned to the individual grid points. In the case of a road milling machine, these are, for example, the angles 35 °, 40 ° and 45 °.
Die gerasterte Verstellung läßt sich beispielsweise dadurch verwirklichen, daß der Meißelhalter mit einer Zahnung versehen ist, die in Eingriff mit einer Gegenzahnung des Basisteils steht, daß die Zahnung und die Gegenzahnung flächige Stützflanken aufweisen, die sich quer zur Verstellrichtung des Meißelhalters gegenüber dem Basisteil erstrecken. Über die Stützflanken können die im Arbeits- betrieb auftretenden Kräfte sicher in das Basisteil abgeleitet werden. Üblicherweise ist das Meißelhalterwechselsystem auf einem walzenförmigen Grundkörper aufgebracht, der sich um eine Rotationsachse bewegen läßt. Damit auch die, in Richtung der Rotationsachse wirkenden Kräfte im Arbeitseinsatz si- eher aufgenommen werden kann, ist ein erfindungsgemäßes Meißelhalterwechselsystem dadurch gekennzeichnet, daß die Gegenzahnung des Basisteils zwei Teilzahnungen aufweist, und daß die Teilzahnungen zur Aufnahme von Querkräften in Richtung quer zur Vorschubrichtung des Meißels geneigt sind.The rasterized adjustment can be achieved, for example, in that the chisel holder is provided with a toothing that is in engagement with a counter-toothing of the base part, that the toothing and the counter-toothing have flat support flanks that extend transversely to the direction of adjustment of the bit holder relative to the base part. The forces occurring during operation can be safely diverted into the base part via the support flanks. The tool holder changing system is usually applied to a roller-shaped base body which can be moved about an axis of rotation. In order that the forces acting in the direction of the axis of rotation can be absorbed in work, a tool holder changing system according to the invention is characterized in that the counter-toothing of the base part has two partial teeth and that the partial teeth for absorbing transverse forces in the direction transverse to the feed direction of the bit are inclined.
Eine alternative Ausgestaltungsvariante eines Meißelhalterwechselsystems läßt sich beispielsweise dadurch verwirklichen, daß das Basisteil ein Anlageteil aufweist, das mit einer Vielzahl konzentrisch angeordneter Zahnelemente der Gegenzahnung ausgestattet ist, daß der Meißelhalter eine Spannplatte trägt, die mit einer auf die Gegenzahnung angepaßt ausgebildeten Zahnung versehen ist, und daß der Meißelhalter gegenüber dem Basisteil um eine Verstellachse verdrehbar ist, die quer zur Vorschubrichtung des Meißels angeordnet ist. Eine solche Verbindungsmechanik kann auch als Hirth-Verzahnung ausgebildet sein. Aufgrund der Vielzahl der Zahnelemeπte lassen sich über diese Verbindungsmechanik extrem hohe Kräfte übertragen.An alternative design variant of a bit holder change system can be realized, for example, in that the base part has a contact part which is equipped with a plurality of concentrically arranged tooth elements of the counter-toothing, that the bit holder carries a clamping plate which is provided with a toothing adapted to the counter-toothing, and that the bit holder is rotatable relative to the base part about an adjustment axis which is arranged transversely to the direction of advance of the bit. Such a connection mechanism can also be designed as a Hirth tooth system. Due to the large number of tooth elements, extremely high forces can be transmitted via this connection mechanism.
Um eine feste Verbindung des Meißelhalters mit dem Basisteil zu schaffen, die gleichzeitig aber auch einen einfachen und schnellen Wechsel des Arbeitswinkels zuläßt, kann es nach einer Ausgestaltung der Erfindung vorgesehen sein, daß der Meißelhalter einen Grundkörper aufweist, der einen Halteansatz zur Aufnahme des Meißels trägt, daß der Grundkörper ein Langloch aufweist, das fluchtend zu einer Gewindeaufnahme des Basisteils angeordnet ist, daß in das Langloch eine Befestigungsschraube einführbar und in die Gewindeaufnahme einschraubbar ist, und daß der Meißelhalter bei gelöster Befestigungsschraube verstellbar ist.In order to create a firm connection of the chisel holder to the base part, which at the same time also allows a simple and quick change of the working angle, it can be provided according to one embodiment of the invention that the chisel holder has a base body which carries a holding attachment for receiving the chisel that the base body has an elongated hole which is aligned with a threaded receptacle of the base part, that a fastening screw can be inserted into the elongated hole and screwed into the threaded receptacle, and that the bit holder is adjustable when the fastening screw is loosened.
Der Schraubenkopf der Befestigungsschraube sollte hierbei in einer Ausnehmung geschützt untergebracht sein, die sich im Anschluß an das Langloch erweitert. Eine besonders gute und feste Verspannung des Schraubenkopfes mit dem Meißelhalter läßt sich dann erreichen, wenn der Schraubenkopf als Linsen- schraubenkopf ausgebildet ist.The screw head of the fastening screw should be protected in a recess that widens after the elongated hole. A particularly good and firm bracing of the screw head with the chisel holder can be achieved if the screw head is designed as a lens screw head.
Im Veschleißfall oder bei unzulässig hohen Beanspruchungen kann es vorkommen, daß ein Meißelhalter Schaden nimmt. Um zu verhindern, daß der Meißelhalter dabei unkontrolliert abbricht und beispielsweise das Basisteil beschädigt kann es vorgesehen sein, daß der Meißelhalter an einem Grundkörper einen Halteansatz trägt, daß der Halteansatz eine Aufnahmebohrung für einen Meißelschaft des Meißels aufweist, und daß der Halteansatz mit dem Grundkörper über eine Sollbruchstelle verbunden ist.In the event of wear or in the case of impermissibly high loads, it can happen that a bit holder is damaged. In order to prevent the chisel holder from breaking off in an uncontrolled manner and, for example, damaging the base part, it can be provided that the chisel holder carries a holding attachment on a base body, that the holding attachment has a receiving bore for a chisel shaft of the chisel, and that the holding attachment with the base body over a predetermined breaking point is connected.
Die Erfindung wird im folgenden anhand von in den Zeichnungen dargestellten Ausführungsbeispielen näher erläutert. Es zeigen:The invention is explained in more detail below with reference to exemplary embodiments shown in the drawings. Show it:
Fig. 1 A und 1 B ein Meißelhalterwechselsystem in zwei Ansichten und in einer ersten Einstellposition,1A and 1B show a tool holder changing system in two views and in a first setting position,
Fig. 2A und 2B das Meißelhalterwechselsystem gemäß den Fig. 1 A und2A and 2B, the bit holder changing system according to FIGS. 1A and
1 B in einer zweiten Einstellposition,1 B in a second setting position,
Fig. 3A und 3B das Meißelhalterwechselsystem gemäß den Fig. 1 A und3A and 3B, the bit holder changing system according to FIGS. 1A and
1 B in einer dritten Einstellposition,1 B in a third setting position,
Fig. 4 eine Ausgestaltungsvariante eines Basisteiles für einFig. 4 shows an embodiment variant of a base part for a
Meißelhalterwechselsystem in perspektivischer Ansicht undChisel holder changing system in perspective view and
Fig. 5 in Seitendarstellung eine weitere Ausgestaltungsvariante eines Meißelhalterwechselsystems. In der Fig. 1 ist ein Meißelhalterwechselsystem dargestellt, das ein Basisteil 40 und einen Meißelhalter 20 aufweist. Das Basisteil 40 weist eine untere Ver- bindungsfläche 41 auf, mit der es auf einen walzenförmigen Grundkörper, beispielsweise einer Straßenfräse, aufgesetzt werden kann. Die Verbindung mit dem walzenförmigen Grundkörper erfolgt mittels Schweißnähten. An seiner nach oben gewandten Seite ist das Basisteil 40 mit einer bogenförmigen Anlagefläche versehen. Die Anlagefläche weist eine Gegenzahnung 42 auf. Die einzelnen Zähne dieser Gegenzahnung 42 sind, wie dies die Fig. 1 A erkennen läßt, im Querschnitt dreiecksförmig ausgebildet und bilden somit zwei Anlageflanken. Die Zähne der Gegenzahnung 42 erstrecken sich über die gesamte Breite des Basisteils 40. Auf der Hälfte der Breite der Zähne ist eine Gewindeaufnahme 43 in die Anlagefläche des Basisteils 40 eingearbeitet. Die Gewindeaufnahme ist dabei so angeordnet, daß sie zum einen möglichst raumgreifend in das Basisteil eingearbeitet ist und dadurch eine ausreichende Gewindelänge für eine Befestigungsschraube bereitstellt. Wie die Fig. 1 A erkennen läßt, ist die Gewindeaufnahme 43 daher schräg in die Anlagefläche eingebracht. Infolge dieser platzsparenden Anordnung kann auch eine geringe Bauhöhe des Basisteils 40 verwirklicht werden. Dies hat besondere Vorteile, da daher der gesamte Aufbau des Meißelhalterwechselsystems klein gehalten werden kann.Fig. 5 in side view a further embodiment variant of a tool holder changing system. 1 shows a tool holder changing system which has a base part 40 and a tool holder 20. The base part 40 has a lower connection surface 41 with which it can be placed on a cylindrical base body, for example a road milling machine. The connection to the cylindrical base body is made by means of weld seams. On its side facing upward, the base part 40 is provided with an arcuate contact surface. The contact surface has counter teeth 42. As can be seen in FIG. 1A, the individual teeth of this counter-toothing 42 are triangular in cross-section and thus form two contact flanks. The teeth of the counter toothing 42 extend over the entire width of the base part 40. A thread receiver 43 is incorporated into the contact surface of the base part 40 over half the width of the teeth. The thread receptacle is arranged so that it is incorporated into the base part to take up as much space as possible and thereby provides a sufficient thread length for a fastening screw. As can be seen in FIG. 1A, the thread receptacle 43 is therefore introduced obliquely into the contact surface. As a result of this space-saving arrangement, a low overall height of the base part 40 can also be achieved. This has particular advantages, since the entire structure of the bit holder changing system can therefore be kept small.
An dem Basisteil 40 kann der Meißelhalter 20 angebaut werden. Der Meißelhalter 20 weist einen Grundkörper 25 auf, der mit einem Langloch 28 versehen ist. Das Langloch 28 erweitert sich zur Außenseite des Grundkörpers 25 hin mittels einer Ausnehmung 27. Durch das Langloch 28 kann die Befestigungsschraube, die vorliegend die Verbindungsmechanik 30 repräsentiert hindurchgesteckt und in die Gewindeaufnahme 43 hineingeschraubt werden. Dabei ist dann der Schraubenkopf 32 in der Ausnehmung 27 geschützt untergebracht. Bei angezogener Befesti- gungsschraube wird der Schraubenkopf 32 im Übergangsbereich zwischenThe chisel holder 20 can be attached to the base part 40. The chisel holder 20 has a base body 25 which is provided with an elongated hole 28. The elongated hole 28 widens towards the outside of the base body 25 by means of a recess 27. The fastening screw, which in the present case represents the connecting mechanism 30, can be inserted through the elongated hole 28 and screwed into the threaded receptacle 43. The screw head 32 is then protected in the recess 27. When the fastening screw is tightened, the screw head 32 is in the transition area between
Langloch 28 und Ausnehmung 27 an den Meißelhalter 20 angepreßt. Hierdurch kann eine Zahnung 26 des Grundkörpers 25 in festem Eingriff mit der Gegenzahnung 42 gehalten werden. Aufgrund der Vielzahl der in Eingriff stehenden Zähne wird eine große Verbindungsfläche geschaffen, über die derElongated hole 28 and recess 27 pressed against the chisel holder 20. Hereby A toothing 26 of the base body 25 can be held in firm engagement with the counter toothing 42. Due to the large number of teeth that are engaged, a large connecting surface is created over which the
Meißelhalter 20 an das Basisteil 40 angepreßt werden kann und über die im Arbeitseinsatz große Kräfte übertragbar sind.Chisel holder 20 can be pressed against the base part 40 and over which large forces can be transmitted during work.
Der Grundkörper 25 weist einen abstehenden Halteansatz 21 auf, in den eine Aufnahmebohrung 22 eingearbeitet ist. Die Mittellängsachse der Aufnahmebohrung 27 steht dabei rechtwinklig zu der bogenförmigen Anlagefläche des Basisteils 40. Von der Rückseite des Meißelhalterwechselsystems ist ein Austreibkanal 23 in dem Meißelhalter 20 eingebohrt. Der Austreibkanal 23 kreuzt die Aufnahmebohrung 22. In die Aufnahmebohrung 22 kann ein Meißel 10 ein- gesetzt werden. Der Meißel 10 weist einen Meißelkopf 17 auf, der eine Meißelspitze 11 trägt. Die Meißelspitze 1 1 ist als Hartmetallelement ausgebildet. An den Meißelkopf 17 schließt sich ein Meißelschaft an, auf den eine Spannhülse 12 aufgezogen ist. Die Spannhülse 12 ist in der Aufnahmebohrung 22 verspreizt. Gleichzeitig hält die Spannhülse 12 den Meißelschaft des Meißels 10 und verhindert so sein Herausfallen. Im eingesetzten Zustand liegt der Meißelkopf 17 auf einer Verschleißschutzscheibe 14 auf. Die Verschleißschutzscheibe 14 stützt sich um die Aufnahmebohrung 22 herum an dem Meißelhalter 20 ab. Das Ausziehen des Meißels 10 aus der Aufnahmebohrung 22 kann auf zwei verschiedene Arten erfolgen. Zum einen kann ein Austreibdorn durch eine Eintrittsöffnung 24 in den Austreibkanal 23 eingeführt werden, bis dieser an einer Stirnfläche 13 des Meißelschafts zum Liegen kommt. Anschließend kann mit einem Hammerschlag der Meißelschaft aus der Aufnahmebohrung 22 ausgetrieben werden. Weiterhin ist in den Meißelkopf 17 eine umlaufende Ausziehnut 15 eingebracht, in die ein Ausziehwerkzeug eingesetzt werden kann. Mittels eines Hebels kann dann der Meißel 10 aus der Aufnahmebohrung 22 ausgehebelt werden. Die Fig. 1 A und 1 B lassen erkennen, daß die Befestigungsschraube mittig im Langloch 28 angeordnet ist. Hierbei ergibt sich ein Arbeitswinkel a unter dem die Mittellängsachse 16 des Meißels 10 gegenüber der zu bearbeitenden Oberfläche angestellt ist. Der Komplementärwinkel ist in der Fig. 1 A mit a' dargestellt. Wenn nun dieser Arbeitswinkel a verändert werden soll, so muß lediglich die Befestigungsschraube gelöst werden. Dann kann der Meißelhalter 20 gegenüber dem Basisteil 40 versetzt werden. Anschließend wird die Befestigungsschraube wieder angezogen, so daß sich die Zahnung 26 mit der Gegenzahnung 42 verspannen kann. In den Fig. 2A und 2B ist eine solche veränderte Einstellposition gezeigt. Dabei beträgt der Arbeits Winkel a nunmehr 45° (gegenüber der vorherigen Einstellung von 40°). In der Einstellposition gemäß den Fig. 2A und 2B schlägt die Befestigungsschraube und der Schraubenkopf 32 an dem einen Ende des Langloches 28 bzw. der Ausnehmung 27 an.The base body 25 has a protruding retaining lug 21, into which a receiving bore 22 is machined. The central longitudinal axis of the receiving bore 27 is at right angles to the arcuate contact surface of the base part 40. An expulsion channel 23 is drilled into the tool holder 20 from the rear of the tool holder changing system. The drive-out channel 23 crosses the receiving bore 22. A chisel 10 can be inserted into the receiving bore 22. The chisel 10 has a chisel head 17 which carries a chisel tip 11. The chisel tip 1 1 is designed as a hard metal element. A chisel shaft adjoins the chisel head 17, on which a clamping sleeve 12 is fitted. The clamping sleeve 12 is spread out in the receiving bore 22. At the same time, the clamping sleeve 12 holds the chisel shaft of the chisel 10 and thus prevents it from falling out. In the inserted state, the chisel head 17 rests on a wear protection disk 14. The wear protection disc 14 is supported around the receiving bore 22 on the bit holder 20. The chisel 10 can be pulled out of the receiving bore 22 in two different ways. On the one hand, an expulsion mandrel can be inserted into the expulsion channel 23 through an inlet opening 24 until it comes to rest on an end face 13 of the chisel shaft. The chisel shank can then be driven out of the receiving bore 22 with a hammer blow. Furthermore, a circumferential extraction groove 15 is introduced into the chisel head 17, into which an extraction tool can be inserted. The chisel 10 can then be levered out of the receiving bore 22 by means of a lever. 1 A and 1 B show that the fastening screw is arranged centrally in the slot 28. This results in a working angle a at which the central longitudinal axis 16 of the chisel 10 is set in relation to the surface to be machined. The complementary angle is shown in FIG. 1A with a '. If this working angle a is now to be changed, then only the fastening screw has to be loosened. The bit holder 20 can then be displaced relative to the base part 40. The fastening screw is then tightened again, so that the toothing 26 can be braced with the counter toothing 42. Such a changed setting position is shown in FIGS. 2A and 2B. The working angle a is now 45 ° (compared to the previous setting of 40 °). 2A and 2B, the fastening screw and the screw head 32 abut one end of the elongated hole 28 and the recess 27, respectively.
Der andere maximale Arbeitswinkel a ist in den Fig. 3A und 3B veranschaulicht. Hierbei schlägt die Befestigungsschraube und der Schraubenkopf 32 an dem anderen Ende des Langloches 28 bzw. der Ausnehmung 27 an. In den Fig. 3A und 3B ist ein Arbeitswinkel a von 35° verwirklicht. Es ist erkennbar, daß unabhängig von der Einstellposition des Meißelhalters 20 die Mittellängsachse 16 des Meißels 10 stets normal zu der Anlagefläche des Basisteils 40 angeordnet ist. Hierdurch wird eine optimale Ableitung der im Arbeitseinsatz entstehenden Kräfte möglich.The other maximum working angle a is illustrated in FIGS. 3A and 3B. Here, the fastening screw and the screw head 32 abut against the other end of the elongated hole 28 or the recess 27. 3A and 3B, a working angle a of 35 ° is realized. It can be seen that regardless of the setting position of the chisel holder 20, the central longitudinal axis 16 of the chisel 10 is always arranged normal to the contact surface of the base part 40. This enables optimal derivation of the forces generated during work.
In dem in den Fig. 1 A bis 3B dargestellten Ausführungsbeispiels wurde für denIn the embodiment shown in FIGS. 1 A to 3B was for the
Schraubenkopf 32 der Befestigungsschraube eine zylindrische Geometrie gewählt. Zur Verbesserung des Anpressdruckes kann auch eine Linsenkopfgeometrie gewählt werden.Screw head 32 of the fastening screw selected a cylindrical geometry. A lens head geometry can also be selected to improve the contact pressure.
In der Fig. 4 ist eine mögliche Ausgestaltung eines Basisteils 40 in perspektivischer Darstellung gezeigt. Wie diese Zeichnung erkennen läßt, ist die Gegen- zahnung 42 in zwei Teilzahnungen 42.1 und 42.2 unterteilt. Die beiden Teilzahnungen 42.1 und 42.2 sind in Richtung quer zur Vorschubrichtung des Rundschaftmeißels 10 geneigt. Damit bildet sich im Übergangsbereich zwischen den beiden Teilzahnungen 42.1 , 42.2 eine zahnleistenförmige Kante 42.3. Entsprechend dieser Ausbildung der Gegenzahnung 42 ist auch die Zahnung 26 des Meißelhalters 20 ausgeführt. Infolge dieser Ausgestaltung lassen sich die Kräfte, die quer zur Vorschubrichtung des Meißels wirken, formschlüssig über die Zahnung 26 und die Gegenzahnung 42 in das Basisteil 40 übertragen.A possible embodiment of a base part 40 is shown in perspective in FIG. 4. As this drawing shows, the opposite toothing 42 divided into two partial teeth 42.1 and 42.2. The two partial teeth 42.1 and 42.2 are inclined in the direction transverse to the feed direction of the round shank chisel 10. This forms a toothed strip-shaped edge 42.3 in the transition area between the two partial teeth 42.1, 42.2. In accordance with this configuration of the counter toothing 42, the toothing 26 of the bit holder 20 is also designed. As a result of this configuration, the forces acting transversely to the direction of advance of the chisel can be positively transmitted into the base part 40 via the teeth 26 and the counter teeth 42.
In der Fig. 5 ist eine weitere Ausgestaltungsvariante eines Meißelhalterwechselsystems gezeigt. Wie diese Darstellung erkennen läßt, ist das Basisteil 40 mit seiner Verbindungsfläche 41 auf die Oberfläche eines Walzenkörpers 50 aufge- setzt. Das Basisteil 40 besitzt ein Anlageteil 44. Dieses Anlageteil 44 ist mit einer sternförmig ausgebildeten Gegenzahnung 42 versehen. Dabei sind die einzelnen Zähne der Gegenzahnung 42 ausgehend von einem gemeinsamen Zentrum radial nach außen gerichtet. In diesem Zentrum ist auch die Mittellängsachse der Befestigungsschraube angeordnet, von der in Fig. 5 der Schraubenkopf 32 erkennbar ist. Auf das Anlageteil 44 kann eine Spannplatte 25.1 des Grundkörpers 25 des Meißelhalters 20 aufgesetzt werden. Die Spannplatte 2.5 ist mit einer Zahnung 26 versehen, die auf die Gegenzahnung 42 des Basisteils 40 angepaßt ausgebildet ist. Die in der Fig. 5 dargestellte Zahnungsverbindung wird üblicherweise als Hirth-Verzahnung bezeichnet. Die Verspannung der Zahnung 26 mit der Gegenzahnung 42 erfolgt mittels der Befestigungsschraube. Wenn die Befestigungsschraube gelöst ist, kann der Meißelhalter 20 stufenweise, entsprechend der Zahnungsteilung gegenüber dem Basisteil 40 versetzt werden. Damit ändert sich auch der Arbeitswinkel a des Meißels 10.5 shows a further embodiment variant of a bit holder changing system. As can be seen from this illustration, the base part 40 is placed with its connecting surface 41 on the surface of a roller body 50. The base part 40 has an abutment part 44. This abutment part 44 is provided with counter teeth 42 in the form of a star. The individual teeth of the counter toothing 42 are directed radially outwards from a common center. The central longitudinal axis of the fastening screw, of which the screw head 32 can be seen in FIG. 5, is also arranged in this center. A clamping plate 25.1 of the base body 25 of the bit holder 20 can be placed on the system part 44. The clamping plate 2.5 is provided with a toothing 26 which is adapted to the counter toothing 42 of the base part 40. The toothed connection shown in FIG. 5 is usually referred to as a Hirth toothing. The teeth 26 are braced with the counter teeth 42 by means of the fastening screw. When the fastening screw is loosened, the chisel holder 20 can be gradually offset relative to the base part 40 in accordance with the tooth pitch. This also changes the working angle a of the chisel 10.
Mit den in den Zeichnungen dargestellten Meißelhalterwechselsystemen läßt sich der Arbeitswinkel a schnell und ohne großen Aufwand umstellen. Dement- sprechend läßt sich das Abtragswerkzeug, beispielsweise eine Straßenfräse, auf unterschiedliche Anwendungsfälle einfach anpassen. Wird beispielsweise ein großer Arbeitswinkel a gewählt, so läßt sich bei Straßenfräsen eine feine Oberflächenrauhigkeit erzeugen. Kleine Arbeitswinkel a hingegen führen zu einem großen Abraumvolumen bei gleichzeitig großer Rauhtiefe. With the chisel holder changing systems shown in the drawings, the working angle a can be changed quickly and without great effort. Dementia speaking, the removal tool, for example a road milling machine, can be easily adapted to different applications. If, for example, a large working angle α is selected, a fine surface roughness can be generated in road milling machines. Small working angles a, on the other hand, lead to a large overburden volume with a high roughness depth.

Claims

00
AnsprücheExpectations
Ö 1 . Meißelhalterwechselsystem für eine Straßenfräse, einer Schrämmaschine oder dergleichen mit einem Basisteil, an dem ein Meißelhalter mittels einer Verbindungsmechanik auswechselbar befestigt ist, wobei der Meißelhalter wenigstens einen Meißel auswechselbar aufnimmt und wobei die Mittellängsachse des Meißels gegenüber zu bearbeitenden Oberfläche im 0 Arbeitswinkel kleiner als 90° angestellt ist, dadurch gekennzeichnet, daß der Meißelhalter (20) in zwei oder mehreren Anbaupositionen an dem Basisteil (40) festlegbar ist, und daß die Mittellängsachse (16) des Meißels (10) in den verschiedenen An- 5 baupositionen um unterschiedliche Arbeitswinkel (σ) geneigt ist.Ö 1. Chisel holder change system for a road milling machine, a cutting machine or the like with a base part to which a chisel holder is interchangeably fastened by means of a connection mechanism, the chisel holder interchangeably receiving at least one chisel and the central longitudinal axis of the chisel being less than 90 ° in relation to the surface to be machined characterized in that the chisel holder (20) can be fixed in two or more attachment positions on the base part (40), and in that the central longitudinal axis (16) of the chisel (10) in the different attachment positions by different working angles (σ) is inclined.
2. Meißelhalterwechselsystem nach Anspruch 1 , dadurch gekennzeichnet, daß der Meißelhalter (20) mittels einer Stützfläche an einer Anlagefläche des 0 Basisteils (40) abgestützt ist, und daß der Meißelhalter (20) zur Verwirklichung der unterschiedlichen Anbaupositionen an seiner Stützfläche gegenüber der Anlagefläche versetzbar ist.2. Chisel holder changing system according to claim 1, characterized in that the chisel holder (20) is supported by means of a support surface on a contact surface of the base part (40), and that the chisel holder (20) can be displaced relative to the contact surface on its supporting surface in order to achieve the different mounting positions is.
5 3. Meißelhalterwechselsystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Meißelhalter (20) gegenüber dem Basisteil (40) gerastert verstellbar ist. 05 3. tool holder change system according to claim 1 or 2, characterized in that the bit holder (20) can be adjusted in relation to the base part (40). 0
4. Meißelhalterwechselsystem nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Meißelhalter (20) mit einer Zahnung (26) versehen ist, die im Eingriff mit einer Gegenzahnung (42) des Basisteils (40) steht, ό daß die Zahnung (26) und die Gegenzahnung (42) flächige Stützflanken aufweisen, die sich quer zur Verstellrichtung des Meißelhalters (20) gegenüber dem Basisteil (40) erstrecken.4. Chisel holder changing system according to one of claims 1 to 3, characterized in that the chisel holder (20) is provided with a toothing (26) which is in engagement with a counter toothing (42) of the base part (40), ό that the toothing ( 26) and the counter teeth (42) have flat support flanks which extend transversely to the direction of adjustment of the bit holder (20) relative to the base part (40).
5. Meißelhalterwechselsystem nach Anspruch 4, 0 dadurch gekennzeichnet, daß die Gegenzahnung (42) des Basisteils (40) zwei Teilzahnungen (42.1 , 42.2) aufweist, und daß die Teilzahnungen zur Aufnahme von Querkräften (42.1 , 42.2) in Richtung quer zur Vorschubrichtung des Meißels (10) geneigt sind. 55. Chisel holder changing system according to claim 4, 0 characterized in that the counter-toothing (42) of the base part (40) has two partial teeth (42.1, 42.2), and that the partial teeth for receiving transverse forces (42.1, 42.2) in the direction transverse to the feed direction of the Chisels (10) are inclined. 5
6. Meißelhalterwechselsystem nach Anspruch 4, dadurch gekennzeichnet, daß das Basisteil (40) ein Anlageteil (44) aufweist, das mit einer Vielzahl konzentrisch angeordneter Zahnelemente der Gegenzahnung (42) ausge- 0 stattet ist, daß der Meißelhalter (20) eine Spannplatte (25) trägt, die mit einer auf die Gegenzahnung (42) angepaßt ausgebildeten Zahnung (26) versehen ist, und daß der Meißelhalter (20) gegenüber dem Basisteil (40) um eine Verstellachse verdrehbar ist, die quer zur Vorschubrichtung des Meißels (10) an- 5 geordnet ist. 6. Chisel holder changing system according to claim 4, characterized in that the base part (40) has a contact part (44) which is equipped with a plurality of concentrically arranged tooth elements of the counter toothing (42) that the bit holder (20) has a clamping plate ( 25), which is provided with a toothing (26) adapted to the counter-toothing (42), and that the bit holder (20) can be rotated relative to the base part (40) about an adjustment axis which is transverse to the direction of advance of the bit (10) is arranged 5.
7. Meißelhalterwechselsystem nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Meißelhalter (20) einen Grundkörper (25) aufweist, der einen Halteansatz (21 ) zur Aufnahme des Meißels (10) trägt, daß der Grundkörper (25) ein Langloch (28) aufweist, das fluchtend zu einer Gewindeaufnahme (43) des Basisteils (20) angeordnet ist, daß in das Langloch (28) eine Befestigungsschraube einführbar und in die Gewindeaufnahme (43) einschraubbar ist, und daß der Meißelhalter (20) bei gelöster Befestigungsschraube verstellbar ist.7. Chisel holder changing system according to one of claims 1 to 6, characterized in that the chisel holder (20) has a base body (25) which carries a retaining projection (21) for receiving the chisel (10), that the base body (25) has an elongated hole (28), which is arranged in alignment with a thread receptacle (43) of the base part (20), that a fastening screw can be inserted into the slot (28) and screwed into the thread receptacle (43), and that the bit holder (20) is loosened Fastening screw is adjustable.
8. Meißelhalterwechselsystem nach Anspruch 7, dadurch gekennzeichnet, daß sich das Langloch (28) zu einer Ausnehmung (27) erweitert, in der ein8. tool holder change system according to claim 7, characterized in that the elongated hole (28) widens into a recess (27) in which a
Schraubenkopf (32) der Befestigungsschraube untergebracht ist.Screw head (32) of the fastening screw is housed.
9. Meißelhalterwechselsystem nach Anspruch 8, dadurch gekennzeichnet, daß der Schraubenkopf (32) als Linsenkopf ausgebildet ist.9. tool holder change system according to claim 8, characterized in that the screw head (32) is designed as a lens head.
10. Meißelhalterwechselsystem nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der Meißelhalter (20) an seinem Grundkörper (25) einen Halteansatz (21) trägt, daß der Halteansatz (21 ) eine Aufnahmebohrung (22) für einen Meißelschaft des Meißels (10) aufweist, und daß der Halteansatz (21 ) mit dem Grundkörper (25) über eine Sollbruchstelle (25.2) verbunden ist. 10. chisel holder changing system according to one of claims 1 to 9, characterized in that the chisel holder (20) on its base body (25) carries a retaining lug (21), that the retaining lug (21) has a receiving bore (22) for a chisel shank of the chisel ( 10), and that the retaining projection (21) is connected to the base body (25) via a predetermined breaking point (25.2).
EP00904946A 1999-02-27 2000-01-22 Chisel holder changing system Expired - Lifetime EP1159511B1 (en)

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DE19908656A DE19908656C1 (en) 1999-02-27 1999-02-27 Chisel holder changing system
PCT/EP2000/000477 WO2000052303A1 (en) 1999-02-27 2000-01-22 Chisel holder changing system

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US6619756B1 (en) 2003-09-16
EP1159511B1 (en) 2006-05-17
JP2002538339A (en) 2002-11-12
WO2000052303A1 (en) 2000-09-08
JP3392827B2 (en) 2003-03-31
ATE326612T1 (en) 2006-06-15
DE19908656C1 (en) 2000-08-31
DE50012771D1 (en) 2006-06-22

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