EP3221102B1 - Drum for a chopping device, in particular a precision chipper - Google Patents

Drum for a chopping device, in particular a precision chipper Download PDF

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Publication number
EP3221102B1
EP3221102B1 EP15823589.5A EP15823589A EP3221102B1 EP 3221102 B1 EP3221102 B1 EP 3221102B1 EP 15823589 A EP15823589 A EP 15823589A EP 3221102 B1 EP3221102 B1 EP 3221102B1
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EP
European Patent Office
Prior art keywords
drum
spacer
disc
drum according
cutting tools
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Application number
EP15823589.5A
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German (de)
French (fr)
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EP3221102B8 (en
EP3221102A1 (en
Inventor
Johann Doppstadt
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Lig GmbH
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Doppstadt Familienholding GmbH
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Publication of EP3221102A1 publication Critical patent/EP3221102A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • B02C18/146—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers with a rotor comprising a plurality of axially contiguous disc-like segments each having at least one radially extending cutting element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/18—Knives; Mountings thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G13/00—Cutter blocks; Other rotary cutting tools
    • B27G13/08—Cutter blocks; Other rotary cutting tools in the shape of disc-like members; Wood-milling cutters
    • B27G13/10—Securing the cutters, e.g. by clamping collars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/005—Tools therefor

Definitions

  • the invention relates to a drum for a shredding device, in particular an exact chopper, with a shaft on which the drum is arranged, with cutting tools being provided in knife receptacles on the outer circumference of the drum, which are used to shred the material to be shredded, with at least one spacer, that has a support surface or contact surface for the material to be shredded on the drum, the height of which determines the chip size for the shredding.
  • Such drums are known in precision chippers, which are known either as a chopper drum, as a knife drum, flail drum or as a chopper drum. These drums are stored in a housing and can be rotated. These chippers are used in forestry, for example, to shred wood waste. But they also serve to crush feed or to remove cellulosic materials. When using exact chippers, emphasis is placed on an even chip in a certain dimension. It is desirable that different chip sizes for different goods to be shredded can be made with one device. It is known in the prior art that the knives are adjustable in height, i.e. are designed to be changeable in their flight circle. Due to the wear of the knives, however, the chip size changes after a short machining time, which is not wanted.
  • Precision chippers with a drum which have one or more supports which serve as a spacer or spacer for the material to be shredded.
  • the disadvantage of these devices is that the chip size cannot be changed.
  • Another disadvantage of these devices is that the spacer is exposed to very high wear when used as intended.
  • the EP 1 302 288 A2 relates to a wood processing device which comprises a drum having cutting tools.
  • the object of the invention is therefore to propose a device for comminuting material to be comminuted which no longer has at least one of the disadvantages of the prior art described above.
  • the object of the invention is achieved by a drum according to claim 1.
  • the drum is intended for a shredding device, in particular for an exact chopper.
  • the drum has a shaft on which the drum is arranged, with cutting tools being provided in knife receptacles on the outer circumference of the drum, which are used to comminute the material to be comminuted, at least one spacer, which has a support surface or a contact surface for the material to be comminuted on the drum, the height of which determines the chip size for comminution, the height of the spacer being adjustable or changeable, in particular adjustable, on the drum.
  • the drum is characterized in that the spacer is approximately T-shaped in section, so that it is on one side with one side of the upper crosspiece of the T on the outer edge of the drum disc and on the inner radius of the spacer, ie on a Form-fit surface formed there can be placed.
  • This solution according to the invention makes it possible to provide a device in which the chip size for the material to be shredded can be adjusted exactly to a desired dimension by adjusting or adjusting the at least one spacer and in particular can be adjusted to different dimensions. With a single device, different chip sizes of the material to be shredded can consequently be achieved by the inventive design of the drum. This measure also reduces wear on the knives or cutting tools.
  • the invention proposes that the spacer is approximately T-shaped in section, so that it is on one side with one side of the upper transverse web of the T on the outer edge of the drum disk and on the inner radius of the spacer, ie on a Form-fit surface formed there can be placed.
  • a positive connection is additionally provided, namely when the outer edge of the drum disc with the leg of the T in the installed position on the side facing the drum corresponds, ie they have the same radius. This reliably prevents an unwanted adjustment of the chip size.
  • the invention further provides that the two sides of the upper crosspiece are offset from one another.
  • offset is meant that, seen from the side, the upper crossbar of the T is lower on one side than on the other. As a result, two different interlocking surfaces are formed.
  • the invention is characterized in that the spacer is interchangeably arranged on the drum.
  • the spacer is interchangeably arranged on the drum.
  • the drum is formed by at least two drum disks which are arranged parallel to one another and spaced apart from one another on the shaft. This configuration is particularly advantageous because it cleverly enables both the cutting tools and the spacers to be attached to the drum disks without any problems due to the space available. For maintenance purposes too, it is advantageous if there is a certain distance between the individual drum disks, so that the maintenance personnel can easily access the cutting tools or the spacers in the event of maintenance.
  • the drum is designed as a rotor.
  • the drum is arranged, for example, in a housing and rotatably mounted there, so that it functions as a rotor. It does not matter whether the rotor is designed as a compact body that carries the spacers and the cutting tools on certain receptacles or whether a disk-shaped design of the motor is provided, the cutting tools and the spacers then being provided on the disks.
  • the rotor is designed as a compact drum.
  • the knife receptacles with the cutting tools and the at least one spacer are provided on the drum disk.
  • the advantages achieved in this way have already been described above. It is also advantageous if two spacers and two cutting tools are arranged on each drum disc.
  • the knife receptacles are formed in several parts, consisting of a lower part of the knife receptacle, an intermediate piece and a pressure piece, the cutting tool being arranged between the intermediate piece and the pressure piece.
  • the cutting characteristics for the cutting tool can be improved, and wear on the knives can also be minimized at the same time.
  • the arrangement of the intermediate piece makes it possible to hold intermediate pieces of different thicknesses in order, for example, to change the knife thickness or to be able to replace the knives in the event of wear.
  • the knife By means of the pressure piece, the knife is firmly pressed onto the lower part of the knife holder together with the intermediate piece, so that it cannot change in the intended use.
  • the lower part of the knife receptacle is fixed, for example by welding, to the drum or the drum disk, while the pressure piece is fastened to the lower part of the knife holding part, for example by means of known releasable fastening means.
  • Another aspect of the drum according to the invention is that the cutting tools and / or the spacers of two drum disks arranged next to one another are arranged offset to one another. Such an embodiment has proven advantageous and leads to the fact that wear on the knives and also on the spacers can be kept low.
  • the cutting tools and the spacers of two drum disks arranged next to one another are offset from one another in such a way that when the drum rotates, the support surface is active before the cutting tool is active or on the one to be shredded Attacks well.
  • This has the decisive advantage that the knives can only engage at the desired distance in order to obtain the desired chip size or the desired size.
  • this also leads to an increase in the service life of the cutting tools and to a uniform cutting performance of the device as a whole.
  • an advantageous further development of the solution according to the invention is characterized in that the side of the spacer that can be placed on the drum disk, that is to say the side of the upper transverse web of the T facing the drum disk in the installed position, corresponds to the outer radius of the drum disk.
  • the central web of the T-shaped spacer has at least two bores which cooperate with fastening means in order to fasten the spacer to the drum disk. In this way, a secure attachment is achieved by means of a frictional connection.
  • the upper web of the T-shaped spacer tapers in a crescent shape, preferably against the direction of rotation of the drum during the comminution process. This leads to a reduction in wear and increases the accuracy of the cutting performance of the comminution device with the drum according to the invention.
  • the central web of the T-shaped spacer has two further bores in order to fasten the spacer to the drum disk at a different height relative to the center of the drum disk.
  • the spacer is easily possible to set at least two different height positions of the spacer. This is achieved, for example, by attaching the spacer to the drum disk once on the left and once on the right with respect to the longitudinal extent of the drum. Since at the same time the upper crossbar of the T of the spacer is provided at different altitudes with respect to the central axis of the drum, a perfect frictional connection is obtained, which is supplemented by the positive locking of the support of the upper crossbar on the outer edge of the drum disc.
  • the bores for height adjustment of the spacer are designed as elongated holes.
  • a further development of the solution described above is characterized in that the bore formed as an elongated hole has grids in order to fix the spacer at the height positions determined by the grids. These grids serve to avoid displacement of the spacer in the elongated hole under heavy loads.
  • the grids provide an additional form fit that reliably prevents this.
  • the grids can be arranged both in the elongated hole and on the side parts of the central web of the T. It is only important that an additional positive connection is formed, which prevents the spacer from slipping or shifting.
  • a further variant of the drum according to the invention proposes that a preferably triangular support surface is provided on the support surface. This makes it possible to minimize wear on the spacer of the device.
  • a further disadvantage of the prior art, as described at the beginning, is thus eliminated by the solution according to the invention.
  • a further improvement of the variant described above suggests that the support surface is flattened at the corners. Accordingly, it is also provided according to the invention that the front support surface is designed as a protective element for the support surface. Overall, the measures described above serve to further reduce the wear on the contact surface that arises in the intended use. Improved protection of the cutting tools of the device is also achieved.
  • the invention also relates to a comminution device, in particular an exact chopper with at least one drum according to one of the previously described variants or embodiments of the invention.
  • a three-dimensional representation of an embodiment of the drum 1 according to the invention for the comminution device is shown. It is pointed out that this embodiment is in no way restrictive for the invention and only represents one of several possible embodiments.
  • the drum 1 is arranged on a shaft 2.
  • the drum consists of five drum disks 11, which are arranged at a distance from one another on the shaft 2.
  • Two cutting tools 3 are arranged in knife receptacles 31 on each of the drum disks 11.
  • the knife holders 31 consist of a lower knife holder part 33, an intermediate piece 32 and a pressure piece 33, the cutting tool 3 being arranged between the intermediate piece 32 and the pressure piece 33.
  • In the cutting direction in front of the cutting tool 3 is the spacer 4.
  • the spacer 4 is T-shaped, which is very nice in the Fig. 1 is shown in the lower spacer 4.
  • the spacer 4 is fastened on one side to the drum disk 11 with its central web.
  • the fastening takes place in bores 45 by means of fastening means 43.
  • Further bores 44 are provided on the central web of the T-shaped spacer 4, which are intended for the case in which the spacer 4 is to be fastened to the drum disk 11 at a different height , This takes place in a simple manner in that, after it has been detached from the fastening means 43, the spacer 4 is fastened on the other side of the drum disk 11 in holes correspondingly provided there by means of the holes 44 and the fastening means 43.
  • the upper transverse web of the T is provided offset at different heights, on the side facing the drum disks 1 when used as intended.
  • the spacer 4 has a contact surface 41 which is active before the cutting tool 3 is active or attacks the material to be shredded. In other words, the chip size for the material to be shredded is determined by the support surface 41.
  • a support surface 42 is provided in front of the support surface 41, which is essentially triangular. This support surface 42 is rounded or flattened at the corners.
  • the support surface 42 serves as a protective element for the support surface 41.
  • Fig. 2 shows the in Fig. 1 shown drum 1 in front view.
  • Fig. 1 Reference numerals presented are used in this figure for the same features, which is why a new presentation can be dispensed with.
  • the invention was previously described using an exemplary embodiment. The claims filed now and with the application later are attempts to formulate without prejudice to achieve further protection.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Harvester Elements (AREA)
  • Crushing And Grinding (AREA)

Description

Die Erfindung betrifft eine Trommel für eine Zerkleinerungsvorrichtung, insbesondere einen Exakthacker, mit einer Welle, auf der die Trommel angeordnet ist, wobei am äußeren Umfang der Trommel Schneidwerkzeuge in Messeraufnahmen vorgesehen sind, die der Zerkleinerung des zu zerkleinernden Gutes dienen, mit wenigstens einem Distanzstück, dass eine Auflagefläche bzw. Anlagefläche für das zu zerkleinernde Gut an der Trommel aufweist, durch dessen Höhe die Spangröße für die Zerkleinerung bestimmt wird.The invention relates to a drum for a shredding device, in particular an exact chopper, with a shaft on which the drum is arranged, with cutting tools being provided in knife receptacles on the outer circumference of the drum, which are used to shred the material to be shredded, with at least one spacer, that has a support surface or contact surface for the material to be shredded on the drum, the height of which determines the chip size for the shredding.

Derartige Trommeln sind in Exakthackern bekannt, die entweder als Hackerwalze, als Messertrommel, Schlegeltrommel oder auch als Hacktrommel bekannt sind. Diese Trommeln sind in einem Gehäuse gelagert und in eine Drehbewegung versetzbar. Eingesetzt werden diese Hackmaschinen beispielsweise in der Forstwirtschaft, um Holzabfälle zu zerkleinern. Sie dienen aber auch der Zerkleinerung von Futtermitteln oder für das Herauslösen zelluloseartiger Materialien. Beim Einsatz von Exakthackern wird Wert auf einen gleichmäßigen Span in einer bestimmten Dimension gelegt. Dabei ist es gewünscht, dass unterschiedliche Spangrößen für unterschiedliche zu zerkleinernde Güter mit einer Vorrichtung angefertigt werden können. Im Stand der Technik ist es dabei bekannt, dass die Messer höhenverstellbar sind, d.h. in ihrem Flugkreis veränderbar ausgebildet sind. Aufgrund der Abnutzung der Messer tritt hier allerdings nach kurzer Bearbeitungszeit eine Veränderung der Spangröße ein, die nicht gewollt ist. Bekannt sind auch Exakthacker mit einer Trommel, welche eine oder mehrere Auflagen aufweisen, die als Distanzstück bzw. Distanzhalter für das zu zerkleinernde Gut dienen. Der Nachteil dieser Vorrichtungen ist es allerdings, dass die Spangröße nicht veränderbar ist. Ein weiterer Nachteil dieser Vorrichtungen ist es, dass der Distanzhalter einem sehr hohen Verschleiß im bestimmungsgemäßen Einsatz ausgesetzt ist.Such drums are known in precision chippers, which are known either as a chopper drum, as a knife drum, flail drum or as a chopper drum. These drums are stored in a housing and can be rotated. These chippers are used in forestry, for example, to shred wood waste. But they also serve to crush feed or to remove cellulosic materials. When using exact chippers, emphasis is placed on an even chip in a certain dimension. It is desirable that different chip sizes for different goods to be shredded can be made with one device. It is known in the prior art that the knives are adjustable in height, i.e. are designed to be changeable in their flight circle. Due to the wear of the knives, however, the chip size changes after a short machining time, which is not wanted. Precision chippers with a drum are also known which have one or more supports which serve as a spacer or spacer for the material to be shredded. The disadvantage of these devices, however, is that the chip size cannot be changed. Another disadvantage of these devices is that the spacer is exposed to very high wear when used as intended.

In der Druckschrift DE 10 2005 053 006 B3 wird ein Hackrotor mit einstellbarer Einschneidtiefe beschrieben. Wie bereits aus der Zeichnung ersichtlich, ist dabei der Keil 4 stufenlos höhenverstellbar. Er ist um eine Achse schwenkbar. Der Nachteil dieser Vorrichtung ist allerdings, dass sich beim bestimmungsgemäßen Einsatz die Spangröße ungewollt verändern kann.In the publication DE 10 2005 053 006 B3 describes a chopping rotor with adjustable cutting depth. As can already be seen from the drawing, the wedge 4 is infinitely height-adjustable. It can be swiveled around an axis. The disadvantage of this device, however, is that the chip size can change unintentionally when used as intended.

Die EP 1 302 288 A2 betrifft eine Holzverarbeitungseinrichtung, die eine Schneidwerkzeuge aufweisende Trommel umfasst.The EP 1 302 288 A2 relates to a wood processing device which comprises a drum having cutting tools.

Aufgabe der Erfindung ist es daher, eine Vorrichtung für die Zerkleinerung von zu zerkleinerndem Gut vorzuschlagen, die zumindest einen der zuvor beschriebenen Nachteile des Standes der Technik nicht mehr aufweist.The object of the invention is therefore to propose a device for comminuting material to be comminuted which no longer has at least one of the disadvantages of the prior art described above.

Die Aufgabe der Erfindung wird gelöst durch eine Trommel gemäß Anspruch 1.The object of the invention is achieved by a drum according to claim 1.

Die Trommel ist für eine Zerkleinerungsvorrichtung, insbesondere für einen Exakthacker vorgesehen. Die Trommel weist eine Welle, auf der die Trommel angeordnet ist, wobei am äußeren Umfang der Trommel Schneidwerkzeuge in Messeraufnahmen vorgesehen sind, die der Zerkleinerung des zu zerkleinern Gutes dienen, wenigstens ein Distanzstück, welches eine Auflagefläche bzw. eine Anlagefläche für das zu zerkleinernde Gut an der Trommel aufweist, durch dessen Höhe die Spangröße für die Zerkleinerung bestimmt wird, wobei die Höhenlage des Distanzstücks auf der Trommel einstellbar bzw. veränderbar, insbesondere verstellbar ist, auf.The drum is intended for a shredding device, in particular for an exact chopper. The drum has a shaft on which the drum is arranged, with cutting tools being provided in knife receptacles on the outer circumference of the drum, which are used to comminute the material to be comminuted, at least one spacer, which has a support surface or a contact surface for the material to be comminuted on the drum, the height of which determines the chip size for comminution, the height of the spacer being adjustable or changeable, in particular adjustable, on the drum.

Die Trommel zeichnet sich dadurch aus, dass das Distanzstück im Schnitt gesehen in etwa T-förmig ausgebildet ist, so dass es einseitig mit einer Seite des oberen Querstegs des T auf den äußeren Rand der Trommelscheibe und auf den inneren Radius des Distanzstücks, d.h. auf eine dort gebildete Formschlussfläche aufsetzbar ist. Durch diese erfindungsgemäße Lösung gelingt es, eine Vorrichtung zur Verfügung zu stellen, bei der die Spangröße für das zu zer- kleinernde Gut durch Einstellung bzw. Verstellung des wenigstens einen Distanzstückes exakt auf ein gewünschtes Maß einstellbar und insbesondere auf unterschiedliche Maße einstellbar ist. Mit einer einzigen Vorrichtung lassen sich demzufolge durch die erfindungsgemäße Ausgestaltung der Trommel unterschiedliche Spangrößen des zu zerkleinern Gutes realisieren. Der Verschleiß an den Messern bzw. Schneidwerkzeugen wird durch diese Maßnahme ebenfalls reduziert. Erfindungsgemäß sind zwei Ausführungsformen von der Erfindung umfasst, nämlich sowohl eine stufenlose Verstellung als auch eine stufige bzw. gerastete Verstellung. Geschickter Weise schlägt die Erfindung vor, dass das Distanzstück im Schnitt gesehen in etwa T-förmig ausgebildet ist, so dass es einseitig mit einer Seite des oberen Querstegs des T auf den äußeren Rand der Trommelscheibe und auf den inneren Radius des Distanzstücks, d.h. auf eine dort gebildete Formschlussfläche aufsetzbar ist. Durch diese Ausgestaltung ist es möglich, dass neben der kraftschlüssigen Verbindung, d.h. der Befestigung des Distanzstücks an der Trommelscheibe, ein Formschluss zusätzlich zur Verfügung gestellt wird, nämlich dann, wenn der äußere Rand der Trommelscheibe mit dem Schenkel des T in Einbaustellung auf die Trommel zuweisenden Seite korrespondiert, d.h. sie den gleichen Radius besitzen. Eine ungewollte Verstellung der Spangröße wird dadurch sicher verhindert.The drum is characterized in that the spacer is approximately T-shaped in section, so that it is on one side with one side of the upper crosspiece of the T on the outer edge of the drum disc and on the inner radius of the spacer, ie on a Form-fit surface formed there can be placed. This solution according to the invention makes it possible to provide a device in which the chip size for the material to be shredded can be adjusted exactly to a desired dimension by adjusting or adjusting the at least one spacer and in particular can be adjusted to different dimensions. With a single device, different chip sizes of the material to be shredded can consequently be achieved by the inventive design of the drum. This measure also reduces wear on the knives or cutting tools. According to the invention, two embodiments are encompassed by the invention, namely both a stepless adjustment and a stepped or locked adjustment. Cleverly, the invention proposes that the spacer is approximately T-shaped in section, so that it is on one side with one side of the upper transverse web of the T on the outer edge of the drum disk and on the inner radius of the spacer, ie on a Form-fit surface formed there can be placed. By this configuration, it is possible that in addition to the non-positive connection, that is, the attachment of the spacer to the drum disc, a positive connection is additionally provided, namely when the outer edge of the drum disc with the leg of the T in the installed position on the side facing the drum corresponds, ie they have the same radius. This reliably prevents an unwanted adjustment of the chip size.

Dabei sieht die Erfindung weiter vor, dass die beiden Seiten des oberen Querstegs versetzt zueinander ausgestaltet sind. Mit versetzt ist dabei gemeint, das seitlich gesehen der obere Quersteg des T auf der einen Seite tiefer gelegt ist als auf der anderen. Demzufolge werden zwei unterschiedliche Formschlussflächen gebildet.The invention further provides that the two sides of the upper crosspiece are offset from one another. By offset is meant that, seen from the side, the upper crossbar of the T is lower on one side than on the other. As a result, two different interlocking surfaces are formed.

Die Erfindung zeichnet sich entsprechend einer Weiterbildung dadurch aus, dass das Distanzstück auswechselbar an der Trommel angeordnet ist. Die Vorteile einer solchen Ausgestaltung liegen auf der Hand. Neben einem möglichen Wechsel bei einem Verschleiß bzw. einer Beschädigung des Distanzstücks ist dadurch auch gleichzeitig eine Verstellung des Abstands des Distanzstücks von der Trommelachse möglich. Damit lassen sich unterschiedliche Abstände des Distanzstücks einstellen, wodurch eine unterschiedliche Spangröße resultiert.According to a further development, the invention is characterized in that the spacer is interchangeably arranged on the drum. The advantages of such a configuration are obvious. In addition to a possible change in the event of wear or damage to the spacer, an adjustment of the distance of the spacer from the drum axis is also possible at the same time. This allows different spacing of the spacer to be set, which results in a different chip size.

Erfindungsgemäß wurde gefunden, dass es von Vorteil ist, wenn die Trommel von wenigstens zwei Trommelscheiben gebildet ist, die parallel zueinander und beabstandet voneinander auf der Welle angeordnet sind. Diese Ausgestaltung ist insbesondere von Vorteil, weil es dadurch in geschickter Art und Weise gelingt, sowohl die Schneidwerkzeuge als auch die Distanzstücke aufgrund des vorhandenen Zwischenraum an den Trommelscheiben problemlos zu befestigen. Auch für Wartungszwecke ist es günstig, wenn zwischen den einzelnen Trommelscheiben ein gewisser Abstand ist, damit das Wartungspersonal im Wartungsfall problemlos an die Schneidwerkzeuge bzw. die Distanzstücke gelangen kann.It has been found according to the invention that it is advantageous if the drum is formed by at least two drum disks which are arranged parallel to one another and spaced apart from one another on the shaft. This configuration is particularly advantageous because it cleverly enables both the cutting tools and the spacers to be attached to the drum disks without any problems due to the space available. For maintenance purposes too, it is advantageous if there is a certain distance between the individual drum disks, so that the maintenance personnel can easily access the cutting tools or the spacers in the event of maintenance.

Erfindungsgemäß hat es sich auch als Vorteil erwiesen, wenn die Trommel als Rotor ausgebildet ist. Demzufolge wird die Trommel beispielsweise in einem Gehäuse angeordnet und dort drehbar gelagert, so dass sie als Rotor funktioniert. Dabei spielt es keine Rolle, ob der Rotor als ein kompakter Körper ausgebildet ist, der an bestimmten Aufnahmen die Distanzstücke und die Schneidwerkzeuge trägt oder ob eine scheibenförmige Ausgestaltung des Motors vorgesehen ist, wobei die Schneidwerkzeuge und die Distanzstücke dann an den Scheiben vorgesehen sind.According to the invention, it has also proven to be advantageous if the drum is designed as a rotor. As a result, the drum is arranged, for example, in a housing and rotatably mounted there, so that it functions as a rotor. It does not matter whether the rotor is designed as a compact body that carries the spacers and the cutting tools on certain receptacles or whether a disk-shaped design of the motor is provided, the cutting tools and the spacers then being provided on the disks.

Demnach ist entsprechend einer Variante der Erfindung der Rotor als Kompakttrommel ausgebildet.Accordingly, according to a variant of the invention, the rotor is designed as a compact drum.

Wie bereits erwähnt, ist es nach der Erfindung entsprechend einer vorteilhaften Weiterbildung vorgesehen, dass die Messeraufnahmen mit den Schneidwerkzeugen und das wenigstens eine Distanzstück an der Trommelscheibe vorgesehen sind. Die dadurch erzielten Vorteile wurden bereits weiter vorn beschrieben. Dabei ist es weiterhin von Vorteil, wenn an jeder Trommelscheibe zwei Distanzstücke und zwei Schneidwerkzeuge angeordnet sind.As already mentioned, according to the invention, according to an advantageous further development, the knife receptacles with the cutting tools and the at least one spacer are provided on the drum disk. The advantages achieved in this way have already been described above. It is also advantageous if two spacers and two cutting tools are arranged on each drum disc.

Es hat sich dabei entsprechend einer weiteren erfindungsgemäßen Variante als vorteilhaft erwiesen, wenn die Messeraufnahmen mehrteilig, bestehend aus einem Messeraufnahmeunterteil, einem Zwischenstück und einem Druckstück ausgebildet sind, wobei das Schneidwerkzeug zwischen dem Zwischenstück und dem Druckstück angeordnet ist. Insbesondere durch die Anordnung eines Zwischenstücks lässt sich die Schneidcharakteristik für das Schneidwerkzeug verbessern, wobei gleichzeitig auch der Verschleiß an den Messern minimiert werden kann. Des Weiteren besteht durch die Anordnung des Zwischenstücks die Möglichkeit, dass man Zwischenstücke unterschiedlicher Stärke vorhält, um beispielsweise die Messerstärke zu verändern bzw. die Messer bei einem Verschleiß auswechseln zu können. Durch das Druckstück wird das Messer auf dem Messeraufnahmeunterteil gemeinsam mit dem Zwischenstück fest angedrückt, sodass es sich im bestimmungsgemäßen Einsatz nicht verändern kann. Das Messeraufnahmeunterteil wird dabei beispielsweise fest, zum Beispiel durch Verschweißen, an der Trommel bzw. der Trommelscheibe befestigt, während das Druckstück beispielsweise mittels bekannter lösbare Befestigungsmittel an dem Messeraufnahmeunterteil befestigt wird.In accordance with a further variant according to the invention, it has proven to be advantageous if the knife receptacles are formed in several parts, consisting of a lower part of the knife receptacle, an intermediate piece and a pressure piece, the cutting tool being arranged between the intermediate piece and the pressure piece. In particular, by arranging an intermediate piece, the cutting characteristics for the cutting tool can be improved, and wear on the knives can also be minimized at the same time. Furthermore, the arrangement of the intermediate piece makes it possible to hold intermediate pieces of different thicknesses in order, for example, to change the knife thickness or to be able to replace the knives in the event of wear. By means of the pressure piece, the knife is firmly pressed onto the lower part of the knife holder together with the intermediate piece, so that it cannot change in the intended use. The lower part of the knife receptacle is fixed, for example by welding, to the drum or the drum disk, while the pressure piece is fastened to the lower part of the knife holding part, for example by means of known releasable fastening means.

Ein weiterer Aspekt der erfindungsgemäßen Trommel ist auch, dass die Schneidwerkzeuge und/oder die Distanzstücke von zwei nebeneinander angeordneten Trommelscheiben versetzt zueinander angeordnet sind. Eine solche Ausgestaltung hat sich vorteilhaft bewährt und führt dazu, dass der Verschleiß an den Messern und auch an den Distanzstücken gering gehalten werden kann.Another aspect of the drum according to the invention is that the cutting tools and / or the spacers of two drum disks arranged next to one another are arranged offset to one another. Such an embodiment has proven advantageous and leads to the fact that wear on the knives and also on the spacers can be kept low.

Von besonderem Vorteil ist es dabei, wenn die Schneidwerkzeuge und die Distanzstücke von zwei nebeneinander angeordneten Trommelscheiben so versetzt zueinander angeordnet sind, dass bei einer Drehung der Trommel die Auflagefläche aktiv ist, bevor das Schneidwerkzeug aktiv ist bzw. an dem zu zerkleinernden Gut angreift. Das hat den entscheidenden Vorteil, dass die Messer nur im gewünschten Abstand in Eingriff gelangen können, um die gewünschte Spangröße bzw. das gewünschte Zerkleinerungsmaß zu erhalten. Dies führt natürlich auch zur Erhöhung der Lebensdauer der Schneidwerkzeuge und zu einer gleichmäßigen Schneidleistung der Vorrichtung insgesamt.It is particularly advantageous if the cutting tools and the spacers of two drum disks arranged next to one another are offset from one another in such a way that when the drum rotates, the support surface is active before the cutting tool is active or on the one to be shredded Attacks well. This has the decisive advantage that the knives can only engage at the desired distance in order to obtain the desired chip size or the desired size. Of course, this also leads to an increase in the service life of the cutting tools and to a uniform cutting performance of the device as a whole.

Demzufolge zeichnet sich eine vorteilhafte Weiterbildung der erfindungsgemäßen Lösung dadurch aus, dass die auf die Trommelscheibe aufsetzbare Seite des Distanzstücks, das heißt die in Einbaustellung auf die Trommelscheibe zuweisende Seite des oberen Querstegs des T mit dem äußeren Radius der Trommelscheibe korrespondiert.Accordingly, an advantageous further development of the solution according to the invention is characterized in that the side of the spacer that can be placed on the drum disk, that is to say the side of the upper transverse web of the T facing the drum disk in the installed position, corresponds to the outer radius of the drum disk.

Erfindungsgemäß ist es zudem vorgesehen, dass der mittlere Steg des T-förmigen Distanzstücks wenigstens zwei Bohrungen aufweist, die mit Befestigungsmitteln zusammenwirken, um das Distanzstück an der Trommelscheibe zu befestigen. Hierdurch wird eine sichere Befestigung mithilfe eines Kraftschlusses erreicht. Nach der Erfindung ist es weiterhin alternativ oder zusätzlich vorgesehen, dass seitlich gesehen der obere Steg des T-förmigen Distanzsücks sich sichelförmig verjüngt, vorzugsweise entgegen der Drehrichtung der Trommel beim Zerkleinerungsvorgang. Dies führt zu einer Verringerung des Verschleißes und erhöht die Genauigkeit der Schneidleistung der Zerkleinerungsvorrichtung mit der erfindungsgemäßen Trommel.According to the invention, it is also provided that the central web of the T-shaped spacer has at least two bores which cooperate with fastening means in order to fasten the spacer to the drum disk. In this way, a secure attachment is achieved by means of a frictional connection. According to the invention, it is alternatively or additionally provided that, seen from the side, the upper web of the T-shaped spacer tapers in a crescent shape, preferably against the direction of rotation of the drum during the comminution process. This leads to a reduction in wear and increases the accuracy of the cutting performance of the comminution device with the drum according to the invention.

Entsprechend einer bevorzugten Ausgestaltung der erfindungsgemäßen Trommel ist es vorgesehen, dass der mittlere Steg des T-förmigen Distanzstücks zwei weitere Bohrungen aufweist, um das Distanzstück an der Trommelscheibe in einer anderen Höhenlage bezogen auf das Zentrum der Trommelscheibe zu befestigen. Nun ist es in einfacher Weise möglich, zumindest zwei unterschiedliche Höhenlagen des Distanzstücks einzustellen. Dies gelingt beispielsweise dadurch, indem man das Distanzstück einmal linksseitig mit einmal rechtsseitig bezogen auf die Längserstreckung der Trommel an der Trommelscheibe befestigt. Da gleichzeitig der obere Quersteg des T des Distanzstücks in unterschiedlichen Höhenlagen bezogen auf die Mittelachse der Trommel vorgesehen ist, erhält man wiederum einen perfekten Kraftschluss, der durch den Formschluss der Auflage des oberen Querstegs auf dem äußeren Rand der Trommelscheibe ergänzt wird.According to a preferred embodiment of the drum according to the invention, it is provided that the central web of the T-shaped spacer has two further bores in order to fasten the spacer to the drum disk at a different height relative to the center of the drum disk. Now it is easily possible to set at least two different height positions of the spacer. This is achieved, for example, by attaching the spacer to the drum disk once on the left and once on the right with respect to the longitudinal extent of the drum. Since at the same time the upper crossbar of the T of the spacer is provided at different altitudes with respect to the central axis of the drum, a perfect frictional connection is obtained, which is supplemented by the positive locking of the support of the upper crossbar on the outer edge of the drum disc.

Für die Erreichung einer stufenlosen Verstellung ist es entsprechend einer Weiterbildung der Erfindung vorgesehen, dass die Bohrungen zur Höhenverstellung des Distanzstücks als Langlöcher ausgebildet sind.In order to achieve stepless adjustment, it is provided according to a development of the invention that the bores for height adjustment of the spacer are designed as elongated holes.

Eine Weiterbildung der zuvor beschriebenen Lösung zeichnet sich dadurch aus, dass die als Langloch ausgebildete Bohrung Rasterungen aufweist, um das Distanzstück in durch die Rasterung bestimmten Höhenlagen zu fixieren. Dieser Rasterungen dienen dazu, bei starker Belastung ein Verschieben des Distanzstücks in dem Langloch zu vermeiden. Durch die Rasterungen wird ein zusätzlicher Formschluss zur Verfügung gestellt, der dies sicher verhindert. Die Rasterungen können dabei erfindungsgemäß sowohl in dem Langloch als auch an den Seitenteilen des mittleren Stegs des T angeordnet sein. Wichtig ist dabei nur, dass ein zusätzlicher Formschluss gebildet wird, der ein Verrutschen bzw. Verschieben des Distanzstücks verhindert. Eine weitere Variante der erfindungsgemäßen Trommel schlägt vor, dass an der Auflagefläche eine vorzugsweise dreieckförmig ausgebildete Auflagevorfläche vorgesehen ist. Dadurch gelingt es, den Verschleiß an dem Distanzhalter der Vorrichtung zu minimieren. Somit wird durch die erfindungsgemäße Lösung ein weiterer Nachteil des Standes der Technik, wie er eingangs beschrieben wurde, beseitigt.A further development of the solution described above is characterized in that the bore formed as an elongated hole has grids in order to fix the spacer at the height positions determined by the grids. These grids serve to avoid displacement of the spacer in the elongated hole under heavy loads. The grids provide an additional form fit that reliably prevents this. According to the invention, the grids can be arranged both in the elongated hole and on the side parts of the central web of the T. It is only important that an additional positive connection is formed, which prevents the spacer from slipping or shifting. A further variant of the drum according to the invention proposes that a preferably triangular support surface is provided on the support surface. This makes it possible to minimize wear on the spacer of the device. A further disadvantage of the prior art, as described at the beginning, is thus eliminated by the solution according to the invention.

Eine weitere Verbesserung der zuvor beschriebenen Variante schlägt vor, dass die Auflagevorfläche an den Ecken abgeflacht ist. Demzufolge ist es nach der Erfindung auch vorgesehen, dass die Auflagevorfläche als Schutzelement für die Auflagefläche ausgebildet ist. Die zuvor beschriebenen Maßnahmen dienen insgesamt dazu, den Verschleiß an der Auflagefläche, der im bestimmungsgemäßen Einsatz entsteht, weiter zu reduzieren. Auch wird ein verbesserter Schutz der Schneidwerkzeuge der Vorrichtung erreicht.A further improvement of the variant described above suggests that the support surface is flattened at the corners. Accordingly, it is also provided according to the invention that the front support surface is designed as a protective element for the support surface. Overall, the measures described above serve to further reduce the wear on the contact surface that arises in the intended use. Improved protection of the cutting tools of the device is also achieved.

Die Erfindung betrifft auch eine Zerkleinerungsvorrichtung, insbesondere einen Exakthacker mit wenigstens einer Trommel nach einem der zuvor beschriebenen Varianten bzw. Ausführungsformen der Erfindung.The invention also relates to a comminution device, in particular an exact chopper with at least one drum according to one of the previously described variants or embodiments of the invention.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels weiter beschrieben. Es zeigen:

  • Fig. 1 eine dreidimensionale Darstellung einer Ausführungsform der erfindungsgemäßen Trommel und
  • Fig. 2 die in Fig. 1 dargestellte Trommel als Vorderansicht.
The invention is further described below using an exemplary embodiment. Show it:
  • Fig. 1 a three-dimensional representation of an embodiment of the drum according to the invention and
  • Fig. 2 in the Fig. 1 drum shown as a front view.

In der Fig. 1 ist eine dreidimensionale Darstellung einer Ausführungsform der erfindungsgemäßen Trommel 1 für die Zerkleinerungsvorrichtung gezeigt. Es wird darauf hingewiesen, dass diese Ausführungsform keineswegs einschränkend für die Erfindung ist und nur eine von mehreren möglichen Ausführungsformen darstellt. Die Trommel 1 ist auf einer Welle 2 angeordnet. In der gezeigten Ausführungsform besteht dabei die Trommel aus fünf Trommelscheiben 11 , die beanstandet voneinander auf der Welle 2 angeordnet sind. Auf jeder der Trommelscheiben 11 sind zwei Schneidwerkzeuge 3 in Messeraufnahmen 31 angeordnet. Die Messeraufnahmen 31 bestehen dabei aus einem Messeraufnahmeunterteil 33, einem Zwischenstück 32 und einem Druckstück 33, wobei das Schneidwerkzeug 3 zwischen dem Zwischenstück 32 und dem Druckstück 33 angeordnet ist. In Schneidrichtung vor dem Schneidwerkzeug 3 befindet sich das Distanzstück 4. Das Distanzstück 4 ist dabei T-förmig ausgebildet, was sehr schön in der Fig. 1 in dem unteren Distanzstück 4 gezeigt ist. Das Distanzstück 4 ist dabei mit seinem mittleren Steg einseitig an der Trommelscheibe 11 befestigt. Die Befestigung erfolgt dabei in Bohrungen 45 mittels Befestigungsmitteln 43. An dem mittleren Steg des T-förmig ausgebildeten Distanzstücks 4 sind weitere Bohrungen 44 vorgesehen, die für den Fall gedacht sind, dass man das Distanzstücks 4 in einer anderen Höhenlage an der Trommelscheibe 11 befestigen möchte. Dies erfolgt in einfacher Weise dadurch, dass man das Distanzstück 4, nachdem es von den Befestigungsmitteln 43 gelöst wurde, auf der anderen Seite der Trommelscheibe 11 in dort korrespondierend vorgesehenen Bohrungen mittels der Bohrungen 44 und den Befestigungsmitteln 43 befestigt. Wie ersichtlich, ist der obere Quersteg des T in unterschiedlichen Höhenlagen versetzt vorgesehen, und zwar auf der im bestimmungsgemäßen Einsatz der Trommelscheiben 1 zugewandten Seite. Dort befinden sich an dem inneren Radius des Distanzstücks 4 Formschlussflächen 46. Das Distanzstücks 4 weist eine Auflagefläche 41 auf, die aktiv ist, bevor das Schneidwerkzeug 3 aktiv ist bzw. an dem zu zerkleinern Gut angreift. D.h. durch die Auflagefläche 41 wird demzufolge die Spangröße für das zu zerkleinernde Gut bestimmt. In Schneidrichtung gesehen vor der Auflagefläche 41 ist eine Auflagevorfläche 42 vorgesehen, die im Wesentlichen dreieckförmig ausgebildet ist. Diese Auflagevorfläche 42 ist an den Ecken abgerundet bzw. abgeflacht. Die Auflagevorfläche 42 dient als Schutzelement für die Auflagefläche 41.In the Fig. 1 a three-dimensional representation of an embodiment of the drum 1 according to the invention for the comminution device is shown. It is pointed out that this embodiment is in no way restrictive for the invention and only represents one of several possible embodiments. The drum 1 is arranged on a shaft 2. In the embodiment shown, the drum consists of five drum disks 11, which are arranged at a distance from one another on the shaft 2. Two cutting tools 3 are arranged in knife receptacles 31 on each of the drum disks 11. The knife holders 31 consist of a lower knife holder part 33, an intermediate piece 32 and a pressure piece 33, the cutting tool 3 being arranged between the intermediate piece 32 and the pressure piece 33. In the cutting direction in front of the cutting tool 3 is the spacer 4. The spacer 4 is T-shaped, which is very nice in the Fig. 1 is shown in the lower spacer 4. The spacer 4 is fastened on one side to the drum disk 11 with its central web. The fastening takes place in bores 45 by means of fastening means 43. Further bores 44 are provided on the central web of the T-shaped spacer 4, which are intended for the case in which the spacer 4 is to be fastened to the drum disk 11 at a different height , This takes place in a simple manner in that, after it has been detached from the fastening means 43, the spacer 4 is fastened on the other side of the drum disk 11 in holes correspondingly provided there by means of the holes 44 and the fastening means 43. As can be seen, the upper transverse web of the T is provided offset at different heights, on the side facing the drum disks 1 when used as intended. There are positive locking surfaces 46 on the inner radius of the spacer 4. The spacer 4 has a contact surface 41 which is active before the cutting tool 3 is active or attacks the material to be shredded. In other words, the chip size for the material to be shredded is determined by the support surface 41. When viewed in the cutting direction, a support surface 42 is provided in front of the support surface 41, which is essentially triangular. This support surface 42 is rounded or flattened at the corners. The support surface 42 serves as a protective element for the support surface 41.

Fig. 2 zeigt die in Fig. 1 gezeigte Trommel 1 in Vorderansicht. Die in Fig. 1 vorgestellten Bezugszeichen werden in dieser Fig. für die gleichen Merkmale benutzt, weshalb eine erneute Vorstellung verzichtet werden kann. Die Erfindung wurde zuvor anhand eines Ausführungsbeispiels beschrieben. Die jetzt und mit der Anmeldung später eingereichten Ansprüche sind Versuche zur Formulierung ohne Präjudiz für die Erzielung eines weitergehenden Schutzes. Fig. 2 shows the in Fig. 1 shown drum 1 in front view. In the Fig. 1 Reference numerals presented are used in this figure for the same features, which is why a new presentation can be dispensed with. The invention was previously described using an exemplary embodiment. The claims filed now and with the application later are attempts to formulate without prejudice to achieve further protection.

Die in den abhängigen Ansprüchen angeführten Rückbeziehungen weisen auf die weitere Ausbildung des Gegenstandes des Hauptanspruches durch die Merkmale des jeweiligen Unteranspruches hin. Jedoch sind diese nicht als ein Verzicht auf die Erzielung eines selbständigen, gegenständlichen Schutzes für die Merkmale der rückbezogenen Unteransprüche zu verstehen.The back-references given in the dependent claims indicate the further development of the subject matter of the main claim through the features of the respective sub-claim. However, these are not to be understood as a waiver of the achievement of independent, objective protection for the features of the related subclaims.

Merkmale, die bislang nur in der Beschreibung offenbart wurden, können im Laufe des Verfahrens als von erfindungswesentlicher Bedeutung, zum Beispiel zur Abgrenzung vom Stand der Technik in den Ansprüchen beansprucht werden.Features that were previously only disclosed in the description can be claimed in the course of the method as being of importance for the invention, for example for delimitation from the prior art in the claims.

Claims (18)

  1. A drum for a crushing device, in particular a precision chipper, having a shaft (2) on which the drum (1) is arranged, wherein on the outer periphery of the drum (1) cutting tools (3) are provided in blade holding fixtures (31), which serve the crushing of the material to be crushed, having at least one spacer (4) that has on the drum (1) a support surface (41) and/or contact surface for the material to be crushed, the chip size for the crushing being determined by the height of said spacer,
    wherein the height position of the spacer (4) on the drum (1) is variable and/or changeable, in particular adjustable,
    characterised in that
    the spacer (4), when seen in section view, is approximately T-shaped,
    wherein the two sides of the upper cross web are arranged to one another,
    such that the spacer (4) can be placed on the outer periphery of the drum disc (11) in two different height positions relative to the central axis of the drum by means of the positive-locking surfaces (46) formed with the inner radius of the spacer (4) on the side facing the drum (1).
  2. Drum according to claim 1, characterised in that the spacer (4) is arranged on the drum (1) in a replaceable manner.
  3. Drum according to claim 2, characterised in that the spacer (4) is designed as a deflector.
  4. Drum according to any one of the preceding claims, characterised in that the drum (1) is formed of at least two drum discs (11), which are arranged in parallel with and spaced apart from each other on the shaft (2).
  5. Drum according to any one of the preceding claims, characterised in that the blade holding fixtures (31) having the cutting tools (3), and the at least one spacer (4) are provided on the drum disc (11).
  6. Drum according to any one of the preceding claims, characterised in that the blade receptacles (31) are formed in several parts, consisting of the blade holding fixturebase (33), an intermediate piece (32) and a pressure piece (33), wherein the cutting tool (3) is arranged between the intermediate piece (32) and the pressure piece (33), in particular two spacers (4) and two cutting tools (3) are arranged on each drum disc (11).
  7. Drum according to any one of the preceding claims, characterised in that the cutting tools (3) and/or the spacers (4) of two adjacently arranged drum discs (11) are arranged offset from to another.
  8. Drum according to any one of the preceding claims, characterised in that the cutting tools (3) and the spacers (4) of two adjacently arranged drum discs (11) are arranged offset to one another such that upon rotation of the drum the bearing surface (41) is active before the cutting tool (3) is active and/or acts on the material to be crushed.
  9. Drum according to any claim 7 or 8, characterised in that the side of the spacer (4) that is placeable on the drum disc (11), i.e. the side of the upper cross web of the T-piece facing the drum disc in the installed position, corresponds to the outer radius of the drum disc (11).
  10. Drum according to any one of the preceding claims 7 to 9, characterised in that the middle web of the T-shaped spacer (4) has at least two bores (44) which interact with fastening means (43) in order to fasten the spacer (4) to the drum disc.
  11. Drum according to any one of the preceding claims 7 to 9, characterised in that the middle web of the T-shaped spacer (4) has at least two bores (44) which interact with fastening means (43) in order to fasten the spacer (4) to the drum disc, and, when seen laterally, the upper web of the T-shaped spacer (4) tapers in a sickle shape, preferably counter to the direction of rotation of the drum (1) during the crushing process.
  12. Drum according to any one of the preceding claims 7 to 9, characterised in that, when seen laterally, the upper web of the T-shaped spacer (4) tapers in a sickle shape, preferably counter to the direction of rotation of the drum (1) during the crushing process.
  13. Drum according to any one of the preceding claims 7 to 12, characterised in that the middle web of the T-shaped spacer (4) has two further bores (45) in order to fasten the spacer (4) to the drum disc (11) at a different height position in relation to the centre of the drum disc (1).
  14. Drum according to any one of the preceding claims 10 to 13, characterised in that the bores (44, 45) are designed as slots for the height adjustment of the spacer (4).
  15. Drum according to claim 14, characterized in that the bore formed as a slot (44, 45) has notches in order to fix the spacer (4) in a height position defined by the notches.
  16. Drum according to any one of the preceding claims, characterised in that a preferably triangular-shaped support front surface (42) is provided on the support surface (41).
  17. Drum according to claim 16, characterised in that the support front surface (42) is flattened at the corners, in particular the support front surface (42) is designed as a protective element for the support surface (41).
  18. A crushing device, in particular a precision chipper, having at least one drum (1) according to one of claims 1 to 17.
EP15823589.5A 2014-11-19 2015-11-19 Drum for a chopping device, in particular a precision chipper Active EP3221102B8 (en)

Applications Claiming Priority (2)

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DE202014009164.1U DE202014009164U1 (en) 2014-11-19 2014-11-19 Drum for a shredding device, in particular an exact chipper
PCT/EP2015/002315 WO2016078764A1 (en) 2014-11-19 2015-11-19 Drum for a chopping device, in particular a precision chipper

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EP3221102A1 EP3221102A1 (en) 2017-09-27
EP3221102B1 true EP3221102B1 (en) 2020-01-01
EP3221102B8 EP3221102B8 (en) 2020-02-26

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EP (1) EP3221102B8 (en)
JP (1) JP6661634B2 (en)
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WO (1) WO2016078764A1 (en)

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DE202017000378U1 (en) 2017-01-24 2018-04-25 B. Maier Zerkleinerungstechnik Gmbh Knife drum for shredding wood
CN107790254A (en) * 2017-10-31 2018-03-13 天津仁义合自动化技术股份有限公司 One kind is applied to sheet material blank and waste material breaker
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Publication number Publication date
EP3221102B8 (en) 2020-02-26
US10589282B2 (en) 2020-03-17
WO2016078764A1 (en) 2016-05-26
DE202014009164U1 (en) 2016-02-22
JP2017534452A (en) 2017-11-24
EP3221102A1 (en) 2017-09-27
US20170341082A1 (en) 2017-11-30
JP6661634B2 (en) 2020-03-11

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