EP1943409A1 - Circular-shank tool comprising a tool holder - Google Patents

Circular-shank tool comprising a tool holder

Info

Publication number
EP1943409A1
EP1943409A1 EP06762196A EP06762196A EP1943409A1 EP 1943409 A1 EP1943409 A1 EP 1943409A1 EP 06762196 A EP06762196 A EP 06762196A EP 06762196 A EP06762196 A EP 06762196A EP 1943409 A1 EP1943409 A1 EP 1943409A1
Authority
EP
European Patent Office
Prior art keywords
clamping sleeve
chisel
shank
round shank
holding elements
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
EP06762196A
Other languages
German (de)
French (fr)
Other versions
EP1943409B1 (en
Inventor
Karl Kammerer
Bernhard Mossmann
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.)
Betek GmbH and Co KG
Original Assignee
Betek Bergbau und Hartmetalltechnik Karl Heinz Simon GmbH and Co KG DE
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 Betek Bergbau und Hartmetalltechnik Karl Heinz Simon GmbH and Co KG DE filed Critical Betek Bergbau und Hartmetalltechnik Karl Heinz Simon GmbH and Co KG DE
Publication of EP1943409A1 publication Critical patent/EP1943409A1/en
Application granted granted Critical
Publication of EP1943409B1 publication Critical patent/EP1943409B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/19—Means for fixing picks or holders
    • E21C35/197—Means for fixing picks or holders using sleeves, rings or the like, 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
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/895—Having axial, core-receiving central portion

Definitions

  • the invention relates to a round shank chisel with a shank which is held in the bore of the chisel holder by means of an adapter sleeve, the shank being rotatably held in the adapter sleeve, the adapter sleeve being provided with one or more holding elements which project inwards and which fit into the adapter engage the circumferential groove introduced so that the clamping sleeve is held immovably in the axial direction on the shank of the picks.
  • the axial position of the clamping sleeve on the shaft of the chisel holder is important so that the clamping sleeve has the smallest possible axial play.
  • the shaft of the round shank chisel must be centered in the clamping sleeve by the holding elements in such a way that the shaft can be freely rotated in the clamping sleeve.
  • a round shank chisel with a chisel holder of the type mentioned at the outset is known from EP 0 264 015 A1 and DE 37 12 427 A1.
  • both a circumferential circumferential groove with in the shank of the round shank chisel and the stamped and / or pressed-in holding elements of the clamping sleeve are arranged in the end region of the shaft or the clamping sleeve.
  • the axial position of the clamping sleeve on the shank of the round shank chisel is thus secured, but when attaching the clamping sleeve, attention must be paid to the correct position of the end faces of the clamping sleeve.
  • this arrangement of the circumferential groove and holding elements does not contribute to improved centering of the shank of the round shank chisel in the clamping sleeve.
  • This object of the invention is achieved in that the holding element or elements are arranged in the central transverse plane of the clamping sleeve or have the same axial distance from it, and in that the clamping sleeve is in two axial positions on the shaft of the round shank chisel rotated by 180 ° about its longitudinal axis - Can be brought and optionally fixed in one of the two identical positions.
  • a uniform rotational behavior regardless of the orientation of the clamping sleeve can be achieved in a simple manner in that the holding element or elements are formed symmetrically to the central transverse planes of the clamping sleeve.
  • the outer edges on the two end faces of the clamping sleeve are chamfered, then the insertion of the round shank chisel with the clamping sleeve attached to the shaft into the bore of the chisel holder is facilitated, with the chamfered outer edges of the front sides of the clamping sleeve being carried out in one embodiment stand at an angle of approx. 30 ° to 60 ° to the outer wall of the clamping sleeve in order to enable the clamping sleeve to be reliably joined in a corresponding receptacle of a chisel holder.
  • the holding elements are divided between two punching edges directed transversely to the longitudinal axis of the clamping sleeve and punched in and / or pressed in so that the punching edges overlap one another Extend part of the circumference of the clamping sleeve and have a distance from one another which is equal to or less than the width of the circumferential groove in the shank of the round shank chisel.
  • the holding elements facing the convex groove base of the circumferential groove form a coaxial, concave centering section.
  • the design of the holding elements is preferably provided and designed such that the clamping sleeve has three holding elements, one of which holds the slot opposite the slot of the clamping sleeve, and that the two other holding elements are each offset by approximately 100 ° on the circumference of the clamping sleeve are and that the width of the circumferential groove and thus the associated width of the holding elements is selected about 1/9 to 1/3 of the axial dimension of the clamping sleeve.
  • the concave centering sections of the holding elements extend, for example, over an angular range of approximately 30 ° to 50 ° of the circumference of the clamping sleeve in order to obtain a stable mounting.
  • an embodiment of the holding elements provides that the ends of the concave centering sections of the holding elements have a convex curve, into a transition section and this merge into the inner wall of the adapter sleeve via a concave curve.
  • the convex outer sections of the clamping sleeve opposite the concave centering sections merge at the ends with a concave rounding, a transition section and a convex rounding into the outer wall of the clamping sleeve and that the holding elements are stamped and / or pressed in so far inwards that the convex outer sections, which lie opposite the concave centering sections, are spaced apart from the inner wall of the clamping sleeve, and that the depth of the circumferential groove in the shank of the round shank chisel is dimensioned such that the concave centering sections of the holding elements in the clamping state of the clamping sleeve are a small distance from the groove base of the Take circumferential groove.
  • the face of the clamping sleeve facing the chisel tip is at a distance from the conical insertion section of the bore in the chisel shark.
  • ter stands, which receives a conical shoulder of the chisel head or a centering shoulder of a wear disc arranged between the chisel holder and the chisel head, then this end face of the clamping sleeve is also exposed.
  • FIG. 2 shows a longitudinal section through the clamping sleeve along the line INI of FIG.
  • Fig. 3 shows a cross section through the adapter sleeve along the line IM-III of Fig. 1 and
  • Fig. 4 is a partial longitudinal section through a round shank chisel with a chisel holder, in which a new clamping sleeve according to Fig. 1 to 3 is applied to the shank and inserted into the bore of the chisel holder.
  • 1 to 3 carries the longitudinal slot 11, in which the outer edges 14 and 15 of the end faces 11 and 13 are chamfered.
  • the bevelled outer edges 14 and 15 are at an angle of approximately 30 ° to the outer wall of the clamping sleeve 0, so that these do not interfere with the insertion into a conical insertion section 42 of a bore 41 in a bit holder 40 (see FIG. 4).
  • the outer edges 14 and 15 are chamfered on both end faces 12 and 13, since the clamping sleeve 10 can face the insertion section 42 with each of the two end faces 12 and 13.
  • the holding elements 16, 17 and 18 are arranged in the region of the central transverse plane 38 of the clamping sleeve 10 and are formed symmetrically to the latter.
  • a circumferential groove 39 is introduced into the shank 31 of the round shank chisel 30, the arrangement of which is such that the clamping sleeve 10 can be fixed in one of the two axial positions on the shank 31, in which the holding elements 16, 17 and 18 engage in the circumferential groove 39.
  • the clamping sleeve 20 is mirror image of the central transverse plane 38, it can be fixed on the shaft 31 rotated by 180 °. This facilitates the application, since it is no longer necessary to pay attention to the correct position relative to the shaft 31, as in the known round shank chisels.
  • the new adapter sleeve 10 can therefore assume one of two identical positions on the shaft 31.
  • the coordination of the holding elements 16, 17 and 18 and the circumferential groove 39 in the shaft 31 ensures that the end face 12 facing the bit tip 37 does not protrude into the conical insertion section 42 of the bore 41 in the bit holder 40 and is exposed (see FIG. 4).
  • the chisel head 36 projects into the conical insertion section 42 with a conical shoulder 32 of the collar 33, to which the pull-out groove 34 and the trigger collar 35 of the chisel head 36 with the inserted chisel tip 37 are connected.
  • the clamping sleeve 10 has three holding elements 16, 17 and 18 distributed over the circumference.
  • One holding element 16 is opposite slot 11.
  • the two other holding elements 17 and 18 are offset with an angle X of approximately 100 ° relative to this one holding element 16 on the circumference of the clamping sleeve 10.
  • the holding elements 16, 17 and 18 are divided by two parallel punched edges 20 and 21, which are directed transversely to the longitudinal axis 19 of the clamping sleeve 10 and extend over an angular range of 50 ° to 60 ° of the circumference of the clamping sleeve 10.
  • the ends of the centering sections 22 of the holding elements 16, 17 and 18 pass over a convex curve 26, a transition section and a concave curve 25 into the inner wall of the clamping sleeve 10.
  • the convex outer sections opposite the concave centering sections 22 merge at the two ends via a concave rounding 24, a transition section and a convex rounding 23 into the outer wall of the clamping sleeve 10.
  • the holding elements 16, 17 and 18 can be stamped and / or pressed in so far that they are in the tensioned state of the clamping sleeve 10 in the bore 41 of the bit holder 40 with the concave centering sections 22 at a short distance from the convex groove base of the circumferential groove 39 .
  • the depth of the circumferential groove 39 must be designed accordingly and can also be dimensioned such that the convex outer sections of the holding elements 16, 17 and 18 are spaced apart from the inner wall of the clamping sleeve 10, as can be seen from the cross section according to FIG. 3.
  • the chisel head 36 can be supported on a wear plate which rests on the end face of the chisel holder 40 and projects into the conical insertion section 42 of the chisel holder 40 with a centering projection.
  • the centering shoulder of the wear plate then does not come into contact with the facing end face of the clamping sleeve 10 applied to the shaft 31 of the round shank chisel 30 and cannot impair the rotational mobility of the shaft 31.

Abstract

The invention relates to a circular-shank tool (30) comprising a shank (31) that is held in the bore (41) of a tool holder (40) by means of a locking sleeve (10), said shank (31) being rotatably held in the locking sleeve (10). The locking sleeve (10) is provided with one or more retaining elements (16, 17, 18) that project inwards and engage in a peripheral groove (39) that is provided in the shank (31) of the tool (30), thus indisplaceably securing the locking sleeve (10) in an axial direction on the shank (31) of the tool. Since the locking sleeve (20) is mirror-symmetrical to the central transversal plane (38), it can be fixed to the shank (31) in a position that has been rotated through 180°.

Description

Rundschaftmeißel mit MeißelhalterRound shank chisel with chisel holder
Die Erfindung betrifft einen Rundschaftmeißel mit einem Schaft der mittels einer Spannhülse in der Bohrung des Meißelhalters gehalten ist, wobei der Schaft drehbar in der Spannhülse gehalten ist, wobei die Spannhülse mit einem oder mehreren nach innen ragenden Halteelementen versehen ist, die in eine in den Schaft des Rundschaftmeißels eingebrachte Umfangsnut eingreifen, so dass die Spannhülse in axialer Richtung auf dem Schaft des Rundschaftmeißels unverschiebbar festgehalten ist.The invention relates to a round shank chisel with a shank which is held in the bore of the chisel holder by means of an adapter sleeve, the shank being rotatably held in the adapter sleeve, the adapter sleeve being provided with one or more holding elements which project inwards and which fit into the adapter engage the circumferential groove introduced so that the clamping sleeve is held immovably in the axial direction on the shank of the picks.
Bei einem derartigen Rundschaftmeißel mit Meißelhalter ist die axiale Stellung der Spannhülse auf dem Schaft des Meißelhalters wichtig, damit die Spannhülse ein möglichst kleines Axialspiel besitzt. Zudem muss der Schaft des Rundschaftmeißels in der Spannhülse durch die Halteelemente so zentriert sein, dass der Schaft frei drehbar in der Spannhülse geführt ist.In such a round shank chisel with a chisel holder, the axial position of the clamping sleeve on the shaft of the chisel holder is important so that the clamping sleeve has the smallest possible axial play. In addition, the shaft of the round shank chisel must be centered in the clamping sleeve by the holding elements in such a way that the shaft can be freely rotated in the clamping sleeve.
Ein Rundschaftmeißel mit Meißelhalter der eingangs erwähnte Art ist aus der EP 0 264 015 A1 und der DE 37 12 427 A1 bekannt. Bei diesem bekannten Rundschaftmeißeln sind sowohl eine umlaufende Umfangsnut mit im Schaft des Rundschaftmeißels als auch die eingestanzten und/oder eingedrückten Halteelemente der Spannhülse in dem Endbereich des Schaftes beziehungsweise der Spannhülse an- geordnet. Die axiale Stellung der Spannhülse auf dem Schaft des Rundschaftmeißels ist damit wohl gesichert, beim Aufbringen der Spannhülse muss aber auf die richtige Stellung der Stirnseiten der Spannhülse geachtet werden. Zudem trägt diese Anordnung von Umfangsnut und Halteelementen nicht zu einer verbesserten Zentrierung des Schaf- tes des Rundschaftmeißels in der Spannhülse bei.A round shank chisel with a chisel holder of the type mentioned at the outset is known from EP 0 264 015 A1 and DE 37 12 427 A1. In this known round shank chisels, both a circumferential circumferential groove with in the shank of the round shank chisel and the stamped and / or pressed-in holding elements of the clamping sleeve are arranged in the end region of the shaft or the clamping sleeve. The axial position of the clamping sleeve on the shank of the round shank chisel is thus secured, but when attaching the clamping sleeve, attention must be paid to the correct position of the end faces of the clamping sleeve. In addition, this arrangement of the circumferential groove and holding elements does not contribute to improved centering of the shank of the round shank chisel in the clamping sleeve.
Es ist Aufgabe der Erfindung, bei einem Rundschaftmeißel der eingangs erwähnten Art das Aufbringen der Spannhülse auf den Schaft des Rundschaftmeißels zu erleichtern und dabei die Zentrierung derselben auf dem Schaft zu verbessern.It is an object of the invention to facilitate the application of the clamping sleeve to the shank of the round shank chisel in a round shank chisel of the type mentioned at the beginning and to improve the centering thereof on the shank.
Diese Aufgabe der Erfindung wird dadurch gelöst, dass das oder die Halteelemente in der Mittelquerebene der Spannhülse angeordnet sind oder zu dieser den gleichen axialen Abstand aufweisen, und dass die Spannhülse in zwei um 180° um ihre Längsachse verdrehten axialen Stellung auf dem Schaft des Rundschaftmeißels auf- bringbar und wahlweise in einer der beiden identischen Stellungen darauf festlegbar ist.This object of the invention is achieved in that the holding element or elements are arranged in the central transverse plane of the clamping sleeve or have the same axial distance from it, and in that the clamping sleeve is in two axial positions on the shaft of the round shank chisel rotated by 180 ° about its longitudinal axis - Can be brought and optionally fixed in one of the two identical positions.
Mit der Verlagerung der Halteelemente in die Mittelquerebene der Spannhülse und der entsprechenden Lage der Umfangsnut im Schaft des Rundschaftmeißels braucht beim Aufbringen der Spannhülse nicht auf die richtige Stellung der Stirnseiten der Spannhülse geachtet werden.With the displacement of the holding elements in the central transverse plane of the clamping sleeve and the corresponding position of the circumferential groove in the shank of the round shank chisel, the correct position of the end faces of the clamping sleeve need not be taken into account when applying the clamping sleeve.
Dasselbe gilt beispielsweise auch, wenn zwei oder mehrere Umfangsreihen von Haltelementen im gleichen Abstand zur Mittelquerebene angeordnet sind.The same applies, for example, if two or more circumferential rows of holding elements are arranged at the same distance from the central transverse plane.
Unabhängig von der Stellung der Spannhülse wird stets eine der identischen Stellungen der Spannhülse auf dem Schaft des Rundschaftmeißels erreicht. Mit dieser Fixierung und symmetrischen Lagerung der Spannhülse wird auch die Zentrierung der Spannhülse über die gesamte Längsrichtung verbessert. Damit verbessert sich auch die freie Drehbarkeit des Schaftes in der Spannhülse.Regardless of the position of the adapter sleeve, one of the identical positions of the adapter sleeve on the shank of the round shank chisel is always achieved. This fixation and symmetrical mounting of the adapter sleeve also improves the centering of the adapter sleeve over the entire longitudinal direction. This also improves the free rotatability of the shaft in the adapter sleeve.
Ein unabhängig von der Ausrichtung der Spannhülse gleichmäßiges Drehverhalten kann auf einfache Weise dadurch erreicht werden, dass das bzw. die Halteelemente symmetrisch zu der Mittelquerebenen der Spannhülse ausgebildet sind.A uniform rotational behavior regardless of the orientation of the clamping sleeve can be achieved in a simple manner in that the holding element or elements are formed symmetrically to the central transverse planes of the clamping sleeve.
Ist nach einer weiteren Ausgestaltung vorgesehen, dass die Außenkanten an den beiden Stirnseiten der Spannhülse abgeschrägt sind, dann wird auch das Einbringen des Rundschaftmeißels mit auf dem Schaft aufgebrachter Spannhülse in die Bohrung des Meißelhalters erleichtert, wobei nach einer Ausführung die abgeschrägten Außenkanten der Stirnseiten der Spannhülse im Winkel von ca. 30° bis 60° zur Außenwandung der Spannhülse stehen, um ein zuverlässiges Fügen der Spannhülse in einer entsprechenden Aufnahme eines Meißelhalters zu ermöglichen.If, according to a further embodiment, it is provided that the outer edges on the two end faces of the clamping sleeve are chamfered, then the insertion of the round shank chisel with the clamping sleeve attached to the shaft into the bore of the chisel holder is facilitated, with the chamfered outer edges of the front sides of the clamping sleeve being carried out in one embodiment stand at an angle of approx. 30 ° to 60 ° to the outer wall of the clamping sleeve in order to enable the clamping sleeve to be reliably joined in a corresponding receptacle of a chisel holder.
Um das Axialspiel der Spannhülse auf dem Schaft des Rundschaftmeißels auf ein Minimum zu reduzieren, sieht eine Weiterbildung vor, dass die Halteelemente zwischen zwei quer zur Längsachse der Spannhülse gerichteten Stanzkanten abgeteilt und nach innen eingestanzt und/oder eingedrückt sind, dass sich die Stanzkanten über einen Teil des Umfanges der Spannhülse erstrecken und zueinander einen Abstand aufweisen, der gleich oder kleiner als die Breite der Umfangsnut im Schaft des Rundschaftmeißels ist. Zur Verringerung des Radialspieles kann es zusätzlich vorgesehen sein, dass die Halteelemente den konvexen Nutgrund der Umfangsnut zu- gekehrt einen koaxialen, konkaven Zentrierabschnitt bilden.In order to reduce the axial play of the clamping sleeve on the shank of the round shank chisel to a minimum, a further development provides that the holding elements are divided between two punching edges directed transversely to the longitudinal axis of the clamping sleeve and punched in and / or pressed in so that the punching edges overlap one another Extend part of the circumference of the clamping sleeve and have a distance from one another which is equal to or less than the width of the circumferential groove in the shank of the round shank chisel. To reduce the radial play, it can additionally be provided that the holding elements facing the convex groove base of the circumferential groove form a coaxial, concave centering section.
Die dabei gebildeten konkaven Zentrierungsabschnitte der Halteelemente garantieren dabei eine gute Zentrierung des Schaftes in der Spannhülse. - A -The concave centering sections of the holding elements formed thereby guarantee good centering of the shaft in the clamping sleeve. - A -
Die Ausbildung der Halteelemente ist dabei vorzugsweise so vorgesehen und ausgebildet, dass die Spannhülse drei Halteelemente aufweist, von denen ein Halteelement dem Schlitz der Spannhülse gegenüberliegt, und dass die beiden anderen Halteelemente gegenüber dem einen Halteelement am Umfang der Spannhülse jeweils um ca. 100° versetzt sind sowie dass die Breite der Umfangsnut und damit die zugeordnete Breite der Halteelemente etwa 1/9 bis 1/3 der axialen Abmessung der Spannhülse gewählt ist. Die konkaven Zentrierabschnitte der Halteelemente erstrecken sich dabei beispielsweise über einen Winkelbereich von etwa 30° bis 50° des Umfanges der Spannhülse, um eine stabile Lagerung zu erhalten.The design of the holding elements is preferably provided and designed such that the clamping sleeve has three holding elements, one of which holds the slot opposite the slot of the clamping sleeve, and that the two other holding elements are each offset by approximately 100 ° on the circumference of the clamping sleeve are and that the width of the circumferential groove and thus the associated width of the holding elements is selected about 1/9 to 1/3 of the axial dimension of the clamping sleeve. The concave centering sections of the holding elements extend, for example, over an angular range of approximately 30 ° to 50 ° of the circumference of the clamping sleeve in order to obtain a stable mounting.
Damit an den eingestanzten und/oder eingedrückten Halteelementen keine scharfen Kanten entstehen, die die freie Drehbarkeit des Schaftes des Rundschaftmeißels beeinträchtigen könnten, sieht eine Ausbildung der Halteelemente vor, dass die Enden der konkaven Zentrierabschnitte der Halteelemente über eine konvexe Rundung, in einen Übergansabschnitt und dieser über eine konkave Rundung in die Innenwandung der Spannhülse übergehen. Zusätzlich kann es vorgesehen sein, dass die den konkaven Zentrierabschnitten gegenüberliegenden konvexen Außenabschnitte der Spannhülse an den Enden über eine konkave Rundung, einen Übergangsabschnitt und eine konvexe Rundung in die Außenwandung der Spannhülse übergehen sowie dass die Halteelemente so weit nach innen eingestanzt und/oder eingedrückt sind, dass die konvexen Außenabschnitte, die den konkaven Zentrierabschnitten gegenüberliegen, zu der Innenwandung der Spannhülse beabstandet sind, und dass die Tiefe der Umfangsnut im Schaft des Rundschaftmeißels so bemessen ist, dass die konkaven Zentrierabschnitte der Halteelemente im Spannzustand der Spannhülse einen kleinen Abstand zum Nutgrund der Umfangsnut einnehmen.So that there are no sharp edges on the stamped and / or pressed-in holding elements, which could impair the free rotatability of the shaft of the round shank chisel, an embodiment of the holding elements provides that the ends of the concave centering sections of the holding elements have a convex curve, into a transition section and this merge into the inner wall of the adapter sleeve via a concave curve. In addition, it can be provided that the convex outer sections of the clamping sleeve opposite the concave centering sections merge at the ends with a concave rounding, a transition section and a convex rounding into the outer wall of the clamping sleeve and that the holding elements are stamped and / or pressed in so far inwards that the convex outer sections, which lie opposite the concave centering sections, are spaced apart from the inner wall of the clamping sleeve, and that the depth of the circumferential groove in the shank of the round shank chisel is dimensioned such that the concave centering sections of the holding elements in the clamping state of the clamping sleeve are a small distance from the groove base of the Take circumferential groove.
Ist schließlich vorgesehen, dass die der Meißelspitze zugekehrte Stirnseite der Spannhülse im Abstand zum konischen Einführabschnitt der Bohrung im Meißelhai- ter steht, der einen konischen Absatz des Meißelkopfes oder einen Zentrieransatz einer zwischen Meißelhalter und Meißelkopf angeordneten Verschleißscheibe aufnimmt, dann ist gerade auch diese Stirnseite der Spannhülse freigelegt.Finally, it is provided that the face of the clamping sleeve facing the chisel tip is at a distance from the conical insertion section of the bore in the chisel shark. ter stands, which receives a conical shoulder of the chisel head or a centering shoulder of a wear disc arranged between the chisel holder and the chisel head, then this end face of the clamping sleeve is also exposed.
Die Erfindung wird anhand eines in den Zeichnungen dargestellten Ausführungsbeispieles näher erläutert. Es zeigen:The invention is explained in more detail using an exemplary embodiment shown in the drawings. Show it:
Fig. 1 eine Seitenansicht der neuen Spannhülse auf den Schlitz derselben gesehen,1 is a side view of the new adapter sleeve seen on the slot of the same,
Fig. 2 einen Längsschnitt durch die Spannhülse entlang der Linie INI der Fig.2 shows a longitudinal section through the clamping sleeve along the line INI of FIG.
1 ,1 ,
Fig. 3 einen Querschnitt durch die Spannhülse entlang der Linie IM-III der Fig. 1 undFig. 3 shows a cross section through the adapter sleeve along the line IM-III of Fig. 1 and
Fig. 4 einen Teillängsschnitt durch einen Rundschaftmeißel mit Meißelhalter, bei dem eine neue Spannhülse nach Fig. 1 bis 3 auf dem Schaft aufgebracht und in die Bohrung des Meißelhalters eingesetzt ist.Fig. 4 is a partial longitudinal section through a round shank chisel with a chisel holder, in which a new clamping sleeve according to Fig. 1 to 3 is applied to the shank and inserted into the bore of the chisel holder.
Die Spannhülse 10 nach Fig. 1 bis 3 trägt den längsgerichteten Schlitz 11 , bei der die Außenkanten 14 und 15 der Stirnseiten 11 und 13 abgeschrägt sind. Die abgeschrägten Außenkanten 14 und 15 stehen in einem Winkel von ca. 30° zur Außen- wandung der SpannhülselO, damit diese das Einführen in einen konischen Einführungsabschnitt 42 einer Bohrung 41 eines Meißelhalters 40 nicht beeinträchtigen (siehe Figur 4). Die Außenkanten 14 und 15 sind an beiden Stirnseiten 12 und 13 abgeschrägt, da die Spannhülse 10 mit jeder der beiden Stirnseiten 12 und 13 dem Einführungsabschnitt 42 zugekehrt sein kann.1 to 3 carries the longitudinal slot 11, in which the outer edges 14 and 15 of the end faces 11 and 13 are chamfered. The bevelled outer edges 14 and 15 are at an angle of approximately 30 ° to the outer wall of the clamping sleeve 0, so that these do not interfere with the insertion into a conical insertion section 42 of a bore 41 in a bit holder 40 (see FIG. 4). The outer edges 14 and 15 are chamfered on both end faces 12 and 13, since the clamping sleeve 10 can face the insertion section 42 with each of the two end faces 12 and 13.
Die Halteelemente 16, 17 und 18 sind im Bereich der Mittelquerebene 38 der Spannhülse 10 angeordnet und symmetrisch zu dieser ausgebildet.The holding elements 16, 17 and 18 are arranged in the region of the central transverse plane 38 of the clamping sleeve 10 and are formed symmetrically to the latter.
Wie in Fig. 4 gezeigt ist, ist im Schaft 31 des Rundschaftmeißels 30 eine Umfangsnut 39 eingebracht, deren Anordnung so getroffen ist, dass die Spannhülse 10 in einer der beiden axialen Stellungen auf dem Schaft 31 festgelegt werden kann, bei der die Halteelemente 16, 17 und 18 in die Umfangsnut 39 eingreifen. Da die Spannhülse 20 zur Mittelquerebene 38 spiegelbildlich ausgebildet ist, kann sie um 180° verdreht auf dem Schaft 31 festgelegt werden. Dies erleichtert das Aufbringen, da nicht mehr auf die richtige Stellung zum Schaft 31 geachtet werden muss, wie bei den bekannten Rundschaftmeißeln. Die neue Spannhülse 10 kann daher eine von zwei identischen Stellungen auf dem Schaft 31 einnehmen. Dabei ist durch die Abstimmung der Halteelemente 16, 17 und 18 sowie der Umfangsnut 39 im Schaft 31 sichergestellt, dass auch die der Meißelspitze 37 zugekehrte Stirnseite 12 nicht in den konischen Einführungsabschnitt 42 der Bohrung 41 im Meißelhalter 40 ragt und frei liegt (siehe Fig. 4). In den konischen Einführungsabschnitt 42 ragt der Meißelkopf 36 mit einem konischen Absatz 32 des Bundes 33, an den sich die Auszugskehle 34 und der Abzugsbund 35 des Meißelkopfes 36 mit der eingesetzten Meißelspitze 37 anschließt.As shown in FIG. 4, a circumferential groove 39 is introduced into the shank 31 of the round shank chisel 30, the arrangement of which is such that the clamping sleeve 10 can be fixed in one of the two axial positions on the shank 31, in which the holding elements 16, 17 and 18 engage in the circumferential groove 39. Since the clamping sleeve 20 is mirror image of the central transverse plane 38, it can be fixed on the shaft 31 rotated by 180 °. This facilitates the application, since it is no longer necessary to pay attention to the correct position relative to the shaft 31, as in the known round shank chisels. The new adapter sleeve 10 can therefore assume one of two identical positions on the shaft 31. The coordination of the holding elements 16, 17 and 18 and the circumferential groove 39 in the shaft 31 ensures that the end face 12 facing the bit tip 37 does not protrude into the conical insertion section 42 of the bore 41 in the bit holder 40 and is exposed (see FIG. 4). The chisel head 36 projects into the conical insertion section 42 with a conical shoulder 32 of the collar 33, to which the pull-out groove 34 and the trigger collar 35 of the chisel head 36 with the inserted chisel tip 37 are connected.
Wie die Fig. 1 bis 3 zeigen, weist die Spannhülse 10 drei über den Umfang verteilte Halteelemente 16, 17 und 18 auf. Das eine Halteelement 16 liegt dem Schlitz 11 gegenüber. Die beiden anderen Haltelemente 17 und 18 sind mit einem Winkel X von etwa 100° gegenüber diesem einen Halteelement 16 auf dem Umfang der Spannhülse 10 versetzt angeordnet. Die Halteelemente 16, 17 und 18 sind durch zwei parallele Stanzkanten 20 und 21 abgeteilt, die quer zur Längsachse 19 der Spannhülse 10 gerichtet sind und sich ü- ber einen Winkelbereich von 50° bis 60° des Umfanges der Spannhülse 10 erstrecken.1 to 3 show, the clamping sleeve 10 has three holding elements 16, 17 and 18 distributed over the circumference. One holding element 16 is opposite slot 11. The two other holding elements 17 and 18 are offset with an angle X of approximately 100 ° relative to this one holding element 16 on the circumference of the clamping sleeve 10. The holding elements 16, 17 and 18 are divided by two parallel punched edges 20 and 21, which are directed transversely to the longitudinal axis 19 of the clamping sleeve 10 and extend over an angular range of 50 ° to 60 ° of the circumference of the clamping sleeve 10.
Die eingestanzten und/oder eingedrückten Halteelemente 16, 17 und 18 bilden dem Nutgrund der Umfangsnut 39 zugekehrt einen koaxialen, konkaven Zentrierabschnitt 22, der etwa einen Winkelbereich von 30° bis 50° umfasst.The stamped and / or pressed-in holding elements 16, 17 and 18, facing the groove base of the circumferential groove 39, form a coaxial, concave centering section 22, which comprises approximately an angular range of 30 ° to 50 °.
Die Zentrierabschnitte 22 der Halteelemente 16, 17 und 18 gehen mit ihren Enden über eine konvexe Rundung 26, einen Übergangsabschnitt und eine konkave Rundung 25 in die Innenwandung der Spannhülse 10 über. Die, den konkaven Zentrierabschnitten 22 gegenüberliegenden konvexen Außenabschnitte gehen an den beiden Enden über eine konkave Rundung 24, einen Übergangsabschnitt und eine kon- vexe Rundung 23 in die Außenwandung der Spannhülse 10 über.The ends of the centering sections 22 of the holding elements 16, 17 and 18 pass over a convex curve 26, a transition section and a concave curve 25 into the inner wall of the clamping sleeve 10. The convex outer sections opposite the concave centering sections 22 merge at the two ends via a concave rounding 24, a transition section and a convex rounding 23 into the outer wall of the clamping sleeve 10.
Die Halteelemente 16, 17 und 18 können soweit nach innen geformt eingestanzt und/oder eingedrückt sein, dass sie im verspannten Zustand der Spannhülse 10 in der Bohrung 41 des Meißelhalters 40 mit den konkaven Zentrierabschnitten 22 in geringem Abstand zu dem konvexen Nutgrund der Umfangsnut 39 stehen. Die Tiefe der Umfangsnut 39 ist entsprechend auszulegen und kann zudem so bemessen sein, dass die konvexen Außenabschnitte der Halteelemente 16, 17 und 18 zur Innenwandung der Spannhülse 10 beabstandet sind, wie dem Querschnitt nach Fig. 3 zu entnehmen ist.The holding elements 16, 17 and 18 can be stamped and / or pressed in so far that they are in the tensioned state of the clamping sleeve 10 in the bore 41 of the bit holder 40 with the concave centering sections 22 at a short distance from the convex groove base of the circumferential groove 39 . The depth of the circumferential groove 39 must be designed accordingly and can also be dimensioned such that the convex outer sections of the holding elements 16, 17 and 18 are spaced apart from the inner wall of the clamping sleeve 10, as can be seen from the cross section according to FIG. 3.
Der Meißelkopf 36 kann sich auf einer Verschleißscheibe abstützen, die an der Stirnseite des Meißelhalters 40 anliegt und mit einem Zentrieransatz in den konischen Einführungsabschnitt 42 des Meißelhalters 40 ragt. Der Zentrieransatz der Verschleißscheibe kommt dann nicht mit der zugekehrten Stirnseite der auf dem Schaft 31 des Rundschaftmeißels 30 aufgebrachten Spannhülse 10 in Kontakt und kann die Drehbeweglichkeit des Schaftes 31 nicht beeinträchtigen. The chisel head 36 can be supported on a wear plate which rests on the end face of the chisel holder 40 and projects into the conical insertion section 42 of the chisel holder 40 with a centering projection. The centering shoulder of the wear plate then does not come into contact with the facing end face of the clamping sleeve 10 applied to the shaft 31 of the round shank chisel 30 and cannot impair the rotational mobility of the shaft 31.

Claims

PatentansprücheClaims
1. Rundschaftmeißel (30) mit einem Schaft (31) der mittels einer Spannhülse1. Round shank chisel (30) with a shank (31) by means of an adapter sleeve
(10) in der Bohrung (41) des Meißelhalters (40) gehalten ist, wobei der Schaft (31) drehbar in der Spannhülse (10) gehalten ist, wobei die Spannhülse (10) mit einem oder mehreren nach innen ragenden Halteelementen (16,17,18) versehen ist, die in eine in den Schaft (31) des Rundschaftmeißels (30) einge- brachte Umfangsnut (39) eingreifen, so dass die Spannhülse (10) in axialer(10) is held in the bore (41) of the chisel holder (40), the shaft (31) being rotatably held in the clamping sleeve (10), the clamping sleeve (10) having one or more inwardly projecting holding elements (16, 17, 18) is provided, which engage in a circumferential groove (39) made in the shank (31) of the round shank chisel (30), so that the clamping sleeve (10) is axially
Richtung auf dem Schaft (31) des Rundschaftmeißels (30) unverschiebbar festgehalten ist, dadurch gekennzeichnet, dass das oder die Halteelemente (16,17,18) in der Mittelquerebene (38) der Spannhülse (10) angeordnet sind oder zu dieser den gleichen axialen Abstand aufweisen, und dass die Spannhülse (10) in zwei um 180° um ihre Längsachse (19) verdrehten axialen Stellung auf dem Schaft (31) des Rundschaftmeißels (30) aufbringbar und wahlweise in einer der beiden identischen Stellungen darauf fest- legbar ist. Direction on the shank (31) of the round shank chisel (30) is held immovably, characterized in that the holding element or elements (16, 17, 18) are arranged in the central transverse plane (38) of the clamping sleeve (10) or the same axially to the latter Have a distance, and that the clamping sleeve (10) can be applied in two axial positions rotated by 180 ° about its longitudinal axis (19) on the shank (31) of the round shank chisel (30) and can optionally be fixed thereon in one of the two identical positions.
2. Rundschaftmeißel nach Anspruch 1 , dadurch gekennzeichnet, dass das bzw. die Halteelemente (16,17,18) symmetrisch zu der Mittelquerebenen (38) der Spannhülse (10) ausgebildet sind.2. Round shank chisel according to claim 1, characterized in that the holding element or elements (16, 17, 18) are formed symmetrically to the central transverse planes (38) of the clamping sleeve (10).
3. Rundschaftmeißel nach Anspruch 1 oder 22, dadurch gekennzeichnet, dass die Außenkanten (14,15) an den beiden Stirnseiten (12,13) der Spannhülse (10) abgeschrägt sind.3. Round shank chisel according to claim 1 or 22, characterized in that the outer edges (14, 15) on the two end faces (12, 13) of the clamping sleeve (10) are chamfered.
4. Rundschaftmeißel nach Anspruch 3, dadurch gekennzeichnet, dass die abgeschrägten Außenkanten (14,15) der Spannhülse (10) im Winkel von 10° bis 60° zur Außenwandung der Spannhülse (10) stehen.4. Round shank chisel according to claim 3, characterized in that the bevelled outer edges (14, 15) of the clamping sleeve (10) are at an angle of 10 ° to 60 ° to the outer wall of the clamping sleeve (10).
5. Rundschaftmeißel nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Halteelemente (16,17,18) zwischen zwei quer zur Längsachse (19) der Spannhülse (10) gerichteten Stanzkanten (20,21) abgeteilt und nach innen eingestanzt und/oder eingedrückt sind, dass sich die Stanzkanten (20,21) über einen Teil des Umfanges der Spannhülse (10) erstrecken und zueinander einen Abstand aufweisen, der gleich oder kleiner als die Breite der Umfangsnut (39) im Schaft (31) des Rundschaftmeißels (30) ist. 5. Round shank chisel according to one of claims 1 to 3, characterized in that the holding elements (16, 17, 18) are divided between two punching edges (20, 21) directed transversely to the longitudinal axis (19) of the clamping sleeve (10) and stamped inwards and / or are pressed in that the punched edges (20, 21) extend over part of the circumference of the clamping sleeve (10) and are at a distance from one another which is equal to or less than the width of the circumferential groove (39) in the shank (31) of the round shank chisel (30) is.
6. Rundschaftmeißel nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Halteelemente (16,17,18) den konvexen Nutgrund der Umfangsnut6. Round shank chisel according to one of claims 1 to 5, characterized in that the holding elements (16, 17, 18) the convex groove base of the circumferential groove
(39) zugekehrt einen koaxialen, konkaven Zentrierabschnitt (22) bilden.(39) facing form a coaxial, concave centering section (22).
7. Rundschaftmeißel nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Spannhülse (10) drei Halteelemente (16,17,18) aufweist, von denen ein Halteelement (16) dem Schlitz (11) der Spannhülse (10) gegenüberliegt, und dass die beiden anderen Halteelemente (17,18) gegenüber dem einen Halteelement (16) am Umfang der Spannhülse (10) jeweils um ca. 100° versetzt sind.7. Round shank chisel according to one of claims 1 to 6, characterized in that the clamping sleeve (10) has three holding elements (16, 17, 18), of which one holding element (16) is opposite the slot (11) of the clamping sleeve (10), and that the two other holding elements (17, 18) are each offset by approximately 100 ° relative to the one holding element (16) on the circumference of the clamping sleeve (10).
8. Rundschaftmeißel nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Breite der Umfangsnut (39) und damit die zugeordnete Breite der Halteelemente (16,17,18) etwa 1/9 bis 1/3 der axialen Abmessung der Spannhülse (10) gewählt ist.8. Round shank chisel according to one of claims 1 to 7, characterized in that the width of the circumferential groove (39) and thus the associated width of the holding elements (16, 17, 18) is approximately 1/9 to 1/3 of the axial dimension of the clamping sleeve ( 10) is selected.
9. Rundschaftmeißel nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass sich die konkaven Zentrierabschnitte (22) der Halteelemente (16,17,18) über einen Winkelbereich von etwa 30° bis 50° des Umfanges der Spannhülse (10) erstrecken. 9. Round chisel according to one of claims 6 to 8, characterized in that the concave centering sections (22) of the holding elements (16, 17, 18) extend over an angular range of approximately 30 ° to 50 ° of the circumference of the clamping sleeve (10).
10. Rundschaftmeißel nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, dass die Enden der konkaven Zentrierabschnitte (22) der Halteelemente (16,17,18) über eine konvexe Rundung (26), einen Übergansabschnitt und ei- ne konkave Rundung (25) in die Innenwandung der Spannhülse (10) übergehen, und dass die den konkaven Zentrierabschnitten (22) gegenüberliegenden konvexen Außenabschnitte der Spannhülse (10) an den Enden über eine konkave Rundung (24), einen Übergangsabschnitt und eine konvexe Rundung (23) in die Außenwandung der Spannhülse (10) übergehen.10. Round shank chisel according to one of claims 6 to 9, characterized in that the ends of the concave centering sections (22) of the holding elements (16, 17, 18) via a convex curve (26), a transition section and a concave curve (25 ) pass into the inner wall of the clamping sleeve (10), and that the convex outer sections of the clamping sleeve (10) opposite the concave centering sections (22) at the ends via a concave rounding (24), a transition section and a convex rounding (23) into the Go over the outer wall of the adapter sleeve (10).
11. Rundschaftmeißel nach einem der Ansprüche 6 bis 10, dadurch gekennzeichnet, dass die Halteelemente (16,17,18) so weit nach innen eingestanzt und/oder eingedrückt sind, dass die konvexen Außenabschnitte, die den konkaven11. Round shank chisel according to one of claims 6 to 10, characterized in that the holding elements (16, 17, 18) are stamped and / or pressed in so far that the convex outer sections which make up the concave
Zentrierabschnitten (22) gegenüberliegen, zu der Innenwandung der Spannhülse (10) beabstandet sind, und dass die Tiefe der Umfangsnut (39) im Schaft (31) des Rundschaftmeißels (30) so bemessen ist, dass die konkaven Zentrierabschnitte (22) der Halte- elemente (16,17,18) bei in der Bohrung (41) des Meißelhalters (40) verspannter Spannhülse (10) an dem Nutgrund der Umfangsnut (39) anliegen oder einen kleinen Abstand zu diesem einnehmen.Centering sections (22) are opposite, spaced from the inner wall of the clamping sleeve (10), and that the depth of the circumferential groove (39) in the shank (31) of the round shank chisel (30) is dimensioned such that the concave centering sections (22) of the holding When the clamping sleeve (10) is clamped in the bore (41) of the chisel holder (40), the elements (16, 17, 18) lie against the groove base of the circumferential groove (39) or take a small distance from it.
12. Rundschaftmeißel nach einem der Ansprüche 4 bis 9, dadurch gekennzeichnet, dass die der Meißelspitze (37) zugekehrte Stirnseite (12) der Spannhülse (10) im Abstand zum konischen Einführabschnitt (42) der Bohrung (41) im Meißelhalter (40) steht, der einen konischen Absatz (32) des Meißelkopfes (36) oder einen Zentrieransatz einer zwischen Meißelhalter (40) und Meißelkopf (36) angeordneten Verschleißscheibe aufnimmt. 12. Round shank chisel according to one of claims 4 to 9, characterized in that the end face (12) of the clamping sleeve (10) facing the chisel tip (37) is at a distance from the conical insertion section (42) of the bore (41) in the chisel holder (40) , which has a conical shoulder (32) of the chisel head (36) or a centering shoulder of a wear disc arranged between the chisel holder (40) and the chisel head (36).
EP06762196.1A 2005-10-27 2006-06-27 Circular-shank tool comprising a tool holder Active EP1943409B1 (en)

Applications Claiming Priority (2)

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DE102005051450A DE102005051450B4 (en) 2005-10-27 2005-10-27 Round shank chisel and chisel holder
PCT/EP2006/006157 WO2007048455A1 (en) 2005-10-27 2006-06-27 Circular-shank tool comprising a tool holder

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EP1943409A1 true EP1943409A1 (en) 2008-07-16
EP1943409B1 EP1943409B1 (en) 2014-06-11

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EP (1) EP1943409B1 (en)
JP (1) JP4824761B2 (en)
KR (1) KR101004703B1 (en)
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AU (1) AU2006308264B2 (en)
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TW200726902A (en) 2007-07-16
TWI343446B (en) 2011-06-11
KR20080069581A (en) 2008-07-28
JP2009513849A (en) 2009-04-02
US7922256B2 (en) 2011-04-12
EP1943409B1 (en) 2014-06-11
AU2006308264A1 (en) 2007-05-03
RU2375572C1 (en) 2009-12-10
JP4824761B2 (en) 2011-11-30
US20090162159A1 (en) 2009-06-25
CN101300404A (en) 2008-11-05
WO2007048455A1 (en) 2007-05-03
AU2006308264B2 (en) 2010-11-11
CN101300404B (en) 2011-09-28
DE102005051450B4 (en) 2010-08-05
KR101004703B1 (en) 2011-01-04
DE102005051450A1 (en) 2007-05-03

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