EP1888241B1 - Beater for rotor shredders - Google Patents

Beater for rotor shredders Download PDF

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Publication number
EP1888241B1
EP1888241B1 EP06754951.9A EP06754951A EP1888241B1 EP 1888241 B1 EP1888241 B1 EP 1888241B1 EP 06754951 A EP06754951 A EP 06754951A EP 1888241 B1 EP1888241 B1 EP 1888241B1
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EP
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Prior art keywords
base body
cutting head
support surface
recess
cutting
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EP06754951.9A
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German (de)
French (fr)
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EP1888241A1 (en
Inventor
Ferdinand Doppstadt
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Doppstadt Familienholding GmbH
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Doppstadt Familienholding GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/28—Shape or construction of beater elements

Definitions

  • the invention relates to a flail for rotary shredders, comprising an elongate base body with a pivot bearing, by means of which the flail is pivotally articulated to a rotor about a pivot axis parallel to the rotor axis, and with a support surface extending towards the free end of the base body; a cutting head having cutting edges projecting at opposite ends and supported on the support body and cutting head on the base body by complementary mating structures provided on the support surface and on the support surface; and detachable connecting means for connecting the base body and the cutting head, which are passed through the complementary structures and the support surface of the base body to said complementary structures out a shallow depression in which the complementary, the body-side surface of the cutting head is held.
  • Rotary shredders contain a rotating rotor. At this rotating rotor Schlegel are articulated. The flails are pivotable about axes that are parallel to the axis of rotation of the rotor. As the rotor rotates, the flails are pulled outward by the centrifugal force. They then hit a hammer like a material to be shredded or shredded during the circulation. Such shredders are used for example for shredding waste wood. If a piece of material can not be shredded immediately by a mallet, the flail pivotally mounted on the rotor may deflect after impact. In many Schlegeln a cutting edge is provided so that they seek to split the good to be shredded in the manner of a hatchet or hoe.
  • the flails are exposed to considerable stress during operation of the rotor shredder and subject to heavy wear.
  • Schlegel are wearing parts. It is known to form Schlegel in two parts.
  • a basic body with considerable mass is pivotally mounted on the rotor with a pivot bearing.
  • a cutting head is fixed with a cutting edge, which impinges on the material to be crushed.
  • This cutting head or at least the cutting edge can be hardened.
  • the cutting head is still subject to wear and is replaced from time to time. But it usually does not need to be replaced also the body. It is important, however, that the attachment of the cutting head takes place on the body so that it is able to absorb the strong impact loads and has no weak points.
  • the impact forces should be transferred from the main body (with large mass) fully on the cutting head and thus on the material to be shredded.
  • the reaction forces on impact with the material to be crushed should be absorbed by the body.
  • the US 2,267,865 shows an L-shaped flail for a rotary shredder, in which a first arm carries at its end a pivot bearing and a crushing body forms the second arm of the "L".
  • This crushing body is generally cuboid and has on opposite side surfaces pairs of cutting edges. The cutting edges are parallel to the pivot axis of the L-shaped bracket.
  • This block-like crushing body is bolted by a bolt to the first arm of the bowl.
  • the bolt extends in a crossed manner to the cutting edges in the plane of symmetry between the side surfaces forming the cutting edges.
  • the cutting edges are formed by almost 90 ° edges of the cuboid crushing body.
  • the comminuting body hammers in a hammer-like manner with its side surface forming the cutting edges onto the material to be comminuted.
  • the DE 29 43 456 A1 shows a two-piece hammer for rotary shredders.
  • the cutting edges of the cutting head are aligned with the end faces of the body.
  • the attachment of the cutting head to the continuous flat surface of the body is only with a screw.
  • the US 5,285,974 A discloses a two-piece mallet for a rotary shredder .
  • a crushing body is screwed to a base body.
  • the main body has a block-like main part with a pivot bearing and a protruding flat part of substantially smaller thickness.
  • At this flat part of a crescent-shaped crushing body is screwed with two protruding cutting edges.
  • This crushing body is vibration-isolated from the main body.
  • the cutting edges of the crushing body extend in the direction of movement of the blade over the base of the flat part.
  • the disclosed U.S. patent application US 2004/0056129 A1 shows a two-piece hammer for shredders with a main body and a crushing or cutting head.
  • the main body has a portion of greater thickness, which forms a pivot bearing at its end. With this pivot bearing, the mallet is pivotally mounted on a rotor. At this section of greater thickness is followed to the outside, ie away from the pivot axis, a portion of lesser thickness. This forms on its front side a substantially planar, approximately radially to the pivot axis extending support surface. Between the support surface and the surface of the portion of greater thickness, a step is formed with an inclined surface. On the support surface sits a cutting head of approximately trapezoidal cross-section.
  • the cutting head forms cutting edges with the acute angles of the trapezoidal cross section.
  • the cutting head sits with its rear surface corresponding to the narrower trapezoidal edge on the support surface.
  • the cutting edges are provided on the surface facing away from the support surface.
  • the radially outer cutting edge projects obliquely upwards and outwards beyond the end face of the main body.
  • the other cutting edge is supported on the inclined surface of the step.
  • the connection between the body and the cutting head is made once by conditioning the cutting head on the support surface and the inclined surface of the step and by a bolt.
  • a truncated pyramidal projection is formed on the other hand, but on the support surface a truncated pyramidal projection is formed.
  • the cutting head has a complementary, truncated pyramidal recess.
  • the cutting head is placed with its recess on the projection.
  • the bolt extends through recess and projection. Opposing side surfaces of the pyramid are aligned with the cutting edges.
  • the JP 11076851 discloses a mallet comprising a base body with a cutting head fixed to the base body with a connecting screw.
  • the cutting head has cutting edges and is provided with a projection which projects into a complementary recess in the main body. This approach and the recess serve to center the cutting body on the base body to bring the cutting body in the correct position. Forces and moments can be transmitted only to a very limited extent by the cutting head to the base body by such a connection.
  • the DE 201 20 185 U1 describes a racket for a hammer crusher.
  • the racket consists of a base body and a releasably connected to the body shock body.
  • the impactor is inserted in a rectangular recess in the body. With these clubs, however, it can easily happen that the edges wear out and the impactors can no longer easily be exchanged. When inserting it can also quickly lead to tilting.
  • the hammer crushers are the impactors exposed to great forces and moments, so that it can lead to deformation of the Grundgropers.
  • the WO 02/055203 A1 discloses a projection on the base body, which is designed as a truncated pyramid. This truncated pyramid engages in a complementary depression of the cutting head. The cutting head itself is not sitting in a recess in the support surface of the body. The absorption of forces and moments on the body can only be limited.
  • the invention has for its object to provide a flail of the present type, which has an increased life and ensures better absorption of the forces acting on the cutting edge forces through the stable body.
  • the recess in the support surface of the body is flat quadrilateral truncated pyramid, wherein two opposite side surfaces of the truncated pyramid extend in the longitudinal direction of the body and the other two opposite side surfaces are arranged parallel to the cutting edges; the complementary structures of a truncated pyramid-shaped depression in the support surface of the base body and a corresponding truncated pyramid-shaped projection of the cutting head is formed .
  • the cutting head is reinforced by the approach and thus additional material.
  • the Ausnebroung complementary to the approach is provided in the solid body.
  • the main body can and should be made solid.
  • the body is subject to relatively little wear, so it does not need to be replaced or not often.
  • the body should have a significant mass to increase the impact.
  • the cutting head is usually made of harder material. He is at the cutting edge -independent of one Risk of breakage and subject to frequent replacement.
  • the cutting head should therefore not contain unnecessarily much material and only ensure a clean power transmission to the body.
  • the mallet 10 has two interconnected parts, a main body 12 and a cutting head 14.
  • the main body 12 is elongated.
  • the main body has at one end a bore 16 for a pivot bearing. By means of this pivot bearing the flail-together with other similar flails-can be articulated on a rotor.
  • the base body 12 forms a support surface for the cutting head 14.
  • the support surface is generally designated 18. How out Fig.1 and 4 can be seen, the support surface 18 then forms the bore 16 containing, thickened end portion of the body 12 a step with an inclined surface 20. Subsequently, the support surface 18 forms a flat, four-sided truncated pyramidal depression 22.
  • the base of the truncated pyramid is rectangular with two Longitudinal sides 24,26 which extend in the longitudinal direction of the baffle 10 along the side surfaces of the base body 12 and two transverse sides 28 and 30 which extend across the entire width of the base body 12.
  • the transverse side 28 forms the boundary between the inclined surface 20 and the Recess 22.
  • the transverse side 30 forms substantially the outer, front edge of the base body 12.
  • the shallow recess 22 forms four adjoining trapezoidal surfaces 32, 34, 36 and 38, of which the surfaces 32 and 34 along the base body 12 and the Surfaces 36 and 38 extend across the body 12. Subsequent to this shallow recess 22 and centrally to this, the support surface forms a steeper and deeper, also four-sided pyramidal recess 40.
  • the base of the depression 40 defining truncated pyramid is square, the sides of the square to the longitudinal sides of the body 10 and transverse are aligned to these.
  • the recess 40 has a flat bottom 42. Central to the bottom 42 through the base 12 through a bore 44 is provided.
  • the front end of the base body 12 forms a rounded end face 46. The end face 46 jumps back relative to the axis 48 of the bore 16 of a front edge 50, ie the distance of the end face 46 of the axis 48 is steadily lower from front to back.
  • the cutting head 14 On the support surface 18 of the cutting head 14 is attached.
  • the cutting head 14 is formed symmetrically to its longitudinal center plane 52 and to a plane 54 perpendicular thereto.
  • the rear side of the cutting head 14 is substantially complementary to the support surface 22 of the base body. This back is in Figure 3 represented and generally designated 56.
  • the rear 56 of the cutting head 14 has two planar inclined surfaces 58 and 60 .. These oblique surfaces form the inner and outer end faces of the cutting head 14.
  • the inclined surface 58 extends into Fig.1 from top left to bottom right.
  • the inclined surface 60 extends symmetrically thereto from top right to bottom left in Fig.1 ,
  • Subsequent to the inclined surfaces 58 and 60 forms the back 56 of the Cutting head 14 a flat, four-sided truncated pyramidal projection 62 with two trapezoidal side surfaces 64 and 66 in the longitudinal direction of the bracket 10 and two trapezoidal side surfaces 68 and 70 transversely thereto.
  • the side surfaces 68 and 70 are adjacent to the inclined surfaces 58 and 60, respectively.
  • the adjacent shorter parallel sides 72, 74, 76, 78 of the trapeze join each other and form a square.
  • This square is the base of a steeper and higher four-sided truncated pyramidal projection 80.
  • Centrally through the projection 80 extends a bore 82 which is aligned in the mounted state with the bore 44 of the body and has the same diameter as this.
  • the front of the cutting head 14 (top in Fig.1 is off Fig.1 and 2 seen.
  • the front side of the cutting head 14 has two symmetrical to the plane 54, rectangular, substantially planar surfaces 84 and 86.
  • the sides of the surfaces 84 and 86 are aligned with the longitudinal and transverse directions of the flail.
  • the planes of the planar surfaces 84 and 86 form an obtuse angle.
  • the surfaces 84 and 86 thus rise away from the plane of symmetry towards the front to the end faces 58 and 60, respectively.
  • a flat surface 88 is formed perpendicular to the axis 90 of the bores 44 and 82.
  • the front of the cutting head 14 thus forms a flat, bounded by the surfaces 84, 88 and 86 channel. Centered in the central area 88, centered about the axis 90, is a hexagonal recess 92 which forms a shoulder 94 around the bore 82.
  • a bolt 96 extends with a hexagonal head 98.
  • the head 98 is held in the recess 92 and sits on the shoulder 94 on.
  • the diameter of the shaft 100 is slightly smaller than the inner diameter of the bores 82 and 44.
  • an annular gap 102 is formed between the inner walls of the bores 82 and 44.
  • the bolt 96 is tightened on the rear side of the bracket 10 by a nut 104.
  • the nut 104 is seated in a recess 110 on the rear side of the main body 12.
  • the cutting head 14 is then supported on the support surface 22, that the end face 58 of the support body 14 rests against the inclined surface 20 of the base body and at this is supported, while the opposite end face 60 extends tangentially to the end face 46 of the base body 12 and practically adjoins this.
  • the cutting head 14 forms a cutting edge 106 between the surface 86 and the end surface 60. This cutting edge protrudes forward and outwardly beyond the body.
  • a positive retention takes place here -anders than in the aforementioned US 2004/0056129 A1 -
  • a truncated pyramidal projection 80 of the cutting head 14 which engages in a recess 40 of the base body.
  • the bolt 96 is guided freely through the holes 82 and 44 and is therefore claimed only to train when contraction of the cutting head and body and not to shear.
  • the cutting head can be implemented by 180 ° after loosening the bolt 96 and continue to be used with the other cutting edge 108.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)

Description

Die Erfindung betrifft einen Schlegel für Rotorschredder, enthaltend einen länglichen Grundkörper mit einem Schwenklager, mittels dessen der Schlegel an einem Rotor um eine zu der Rotorachse parallele Schwenkachse schwenkbar anlenkbar ist, und mit einer sich zum freien Ende des Grundkörpers hin erstreckenden Stützfläche; einen Schneidkopf mit an gegenüberliegenden Enden vorstehenden Schneidkanten, der über die Stützfläche und auf der Stützfläche vorgesehene, komplementär ineinandergreifende Strukturen an Stützfläche und Schneidkopf auf dem Grundkörper abgestützt ist; und lösbare Verbindungsmittel zum Verbinden von Grundkörper und Schneidkopf, welche durch die komplementären Strukturen hindurchgeführt sind und die Stützfläche des Grundkörpers zu den besagten komplementären Strukturen hin eine flache Vertiefung bildet, in welcher die dazu komplementäre, grundkörperseitige Fläche des Schneidkopfs gehalten ist.The invention relates to a flail for rotary shredders, comprising an elongate base body with a pivot bearing, by means of which the flail is pivotally articulated to a rotor about a pivot axis parallel to the rotor axis, and with a support surface extending towards the free end of the base body; a cutting head having cutting edges projecting at opposite ends and supported on the support body and cutting head on the base body by complementary mating structures provided on the support surface and on the support surface; and detachable connecting means for connecting the base body and the cutting head, which are passed through the complementary structures and the support surface of the base body to said complementary structures out a shallow depression in which the complementary, the body-side surface of the cutting head is held.

Rotorschredder enthalten einen umlaufenden Rotor. An diesem Umlaufenden Rotor sind Schlegel angelenkt. Die Schlegel sind schwenkbar um Achsen, die zu der Umlaufachse des Rotors parallel sind. Bei Umlauf des Rotors werden die Schlegel durch die Fliehkraft nach außen gezogen. Sie treffen dann bei dem Umlauf hammerartig auf ein zu zerkleinerndes oder zu schredderndes Material. Solche Rotorschredder werden beispielsweise zum Zerkleinern von Abfallholz verwendet. Wenn ein Materialstück durch einen Schlegel nicht sofort zerkleinert werden kann, kann der schwenkbar an dem Rotor gelagerte Schlegel nach dem Schlag ausweichen. Bei vielen Schlegeln ist eine Schneidkante vorgesehen, so daß sie das zu zerkleinernde Gut nach Art eines Beils oder einer Hacke zu spalten suchen.Rotary shredders contain a rotating rotor. At this rotating rotor Schlegel are articulated. The flails are pivotable about axes that are parallel to the axis of rotation of the rotor. As the rotor rotates, the flails are pulled outward by the centrifugal force. They then hit a hammer like a material to be shredded or shredded during the circulation. Such shredders are used for example for shredding waste wood. If a piece of material can not be shredded immediately by a mallet, the flail pivotally mounted on the rotor may deflect after impact. In many Schlegeln a cutting edge is provided so that they seek to split the good to be shredded in the manner of a hatchet or hoe.

Die Schlegel sind beim Betrieb des Rotorschredders erheblichen Beanspruchungen ausgesetzt und starkem Verschleiß unterworfen. Üblicherweise sind die Schlegel Verschleißteile. Es ist bekannt, Schlegel zweiteilig auszubilden. Ein Grundkörper mit erheblicher Masse ist mit einem Schwenklager schwenkbar an dem Rotor angebracht. An diesem Grundkörper ist ein Schneidkopf mit einer Schneidkante befestigt, welcher auf das zu zerkleinernde Gut auftrifft. Dieser Schneidkopf oder zumindest die Schneidkante kann gehärtet sein. Der Schneidkopf unterliegt aber trotzdem Verschleiß und wird von Zeit zu Zeit ausgewechselt. Es braucht aber in der Regel nicht auch der Grundkörper ausgewechselt zu werden. Wichtig ist dabei jedoch, daß die Befestigung des Schneidkopfs an dem Grundkörper so erfolgt, daß sie die starken Schlagbelastungen aufzunehmen vermag und keine Schwachstellen aufweist. Die Schlagkräfte sollen von dem Grundkörper (mit großer Masse) voll auf den Schneidkopf und damit auf das zu zerkleinernde Gut übertragen werden. Die Reaktionskräfte beim Aufprall auf das zu zerkleinernde Gut sollen von dem Grundkörper aufgenommen werden.The flails are exposed to considerable stress during operation of the rotor shredder and subject to heavy wear. Usually, the Schlegel are wearing parts. It is known to form Schlegel in two parts. A basic body with considerable mass is pivotally mounted on the rotor with a pivot bearing. At this body, a cutting head is fixed with a cutting edge, which impinges on the material to be crushed. This cutting head or at least the cutting edge can be hardened. The cutting head is still subject to wear and is replaced from time to time. But it usually does not need to be replaced also the body. It is important, however, that the attachment of the cutting head takes place on the body so that it is able to absorb the strong impact loads and has no weak points. The impact forces should be transferred from the main body (with large mass) fully on the cutting head and thus on the material to be shredded. The reaction forces on impact with the material to be crushed should be absorbed by the body.

Es sind verschiedene Schlegel dieser Art bekannt.There are several flails of this kind known.

Die US 2,267,865 zeigt einen L-förmigen Schlegel für einen Rotationsschredder, bei welchem ein erster Arm an seinem Ende ein Schwenklager trägt und ein Zerkleinerungskörper den zweiten Arm des "L" bildet. Dieser Zerkleinerungskörper ist allgemein quaderförmig und weist auf gegenüberliegenden Seitenflächen Paare von Schneidkanten auf. Die Schneidkanten verlaufen parallel zu der Schwenkachse des L-förmigen Schlegels. Dieser blockartige Zerkleinerungskörper ist durch einen Schraubbolzen mit dem ersten Arm des Schlegels verschraubt. Der Schraubbolzen erstreckt sich dabei gekreuzt zu den Schneidkanten in der Symmetrieebene zwischen den die Schneidkanten bildenden Seitenflächen. Die Schneidkanten werden von nahezu 90°-kanten des quaderförmigen Zerkleinerungskörpers gebildet. An dem ersten Arm sitzt ein rechteckiger Vorsprung, auf welchen der quaderförmige Zerkleinerungskörper mit einem entsprechenden rechteckigen Durchgangskanal aufgesetzt ist. Durch eine Bohrung des Vorsprungs ist und den Durchgangskanal ist der Schraubbolzen geführt. Bei dieser Anordnung ist die vordere Seitenfläche des quaderförmigen Zerkleinerungskörpers im wesentlichen Senkrecht zu der Bewegungsrichtung. Bei Umlauf des Rotors trifft der Zerkleinerungskörper hammerartig mit seiner die Schneidkanten bildenden Seitenfläche auf das zu zerkleinernde Gut auf.The US 2,267,865 shows an L-shaped flail for a rotary shredder, in which a first arm carries at its end a pivot bearing and a crushing body forms the second arm of the "L". This crushing body is generally cuboid and has on opposite side surfaces pairs of cutting edges. The cutting edges are parallel to the pivot axis of the L-shaped bracket. This block-like crushing body is bolted by a bolt to the first arm of the bowl. The bolt extends in a crossed manner to the cutting edges in the plane of symmetry between the side surfaces forming the cutting edges. The cutting edges are formed by almost 90 ° edges of the cuboid crushing body. On the first arm sits a rectangular projection on which the cuboid crushing body is mounted with a corresponding rectangular passage. Through a bore of the projection and the passage channel of the bolt is guided. In this arrangement, the front side surface of the cuboid crushing body is substantially perpendicular to the moving direction. When the rotor rotates, the comminuting body hammers in a hammer-like manner with its side surface forming the cutting edges onto the material to be comminuted.

Die DE 29 43 456 A1 zeigt einen zweiteiligen Schlegel für Rotationsschredder. Bei diesem Schlegel fluchten die Schneidkanten des Schneidkopfs mit den Stirnflächen des Grundkörpers. Die Befestigung des Schneidkopfs an der durchgehend planen Oberfläche des Grundkörpers erfolgt nur mit einer Schraube.The DE 29 43 456 A1 shows a two-piece hammer for rotary shredders. In this mallet, the cutting edges of the cutting head are aligned with the end faces of the body. The attachment of the cutting head to the continuous flat surface of the body is only with a screw.

Die US 5,285,974 A offenbart einen zweiteiligen Schlegel für einen Rotorschredder.. Bei diesem Schlegel ist ein Zerkleinerungskörper an einen Grundkörper angeschraubt. Der Grundkörper weist einen blockartigen Hauptteil mit einem Schwenklager und einen davon vorstehenden flachen Teil wesentlich geringerer Dicke auf. An diesen flachen Teil ist ein halbmondartiger Zerkleinerungskörper mit zwei vorstehenden Schneidkanten angeschraubt. Dieser Zerkleinerungskörper ist gegenüber dem Grundkörper schwingungsisoliert. Die Schneidkanten des Zerkleinerungskörpers erstrecken sich dabei in der Bewegungsrichtung des Schlegels über der Grundfläche des flachen Teils.The US 5,285,974 A discloses a two-piece mallet for a rotary shredder .. In this mallet a crushing body is screwed to a base body. The main body has a block-like main part with a pivot bearing and a protruding flat part of substantially smaller thickness. At this flat part of a crescent-shaped crushing body is screwed with two protruding cutting edges. This crushing body is vibration-isolated from the main body. The cutting edges of the crushing body extend in the direction of movement of the blade over the base of the flat part.

Die offengelegte US-Patentanmeldung US 2004/0056129 A1 zeigt einen zweiteiligen Schlegel für Rotorschredder mit einem Grundkörper und einem Zerkleinerungs- oder Schneidkopf. Der Grundkörper weist einen Abschnitt größerer Dicke auf, welcher an seinem Ende ein Schwenklager bildet. Mit diesem Schwenklager wird der Schlegel an einem Rotor schwenkbar gelagert. An diesen Abschnitt größerer Dicke schließt sich nach außen, also von der Schwenkachse weg, ein Abschnitt geringerer Dicke an. Dieser bildet auf seiner Vorderseite eine im wesentlichen plane, etwa radial zu der Schwenkachse verlaufende Stützfläche. Zwischen der Stützfläche und der Oberfläche des Abschnitts größerer Dicke ist eine Stufe mit einer Schrägfläche gebildet. Auf der Stützfläche sitzt ein Schneidkopf von näherungsweise trapezförmigem Querschnitt. Der Schneidkopf bildet mit den spitzen Winkeln des trapezförmigen Querschnitts Schneidkanten, Dabei sitzt der Schneidkopf mit seiner der schmaleren Trapezkante entsprechenden rückwärtigen Fläche auf der Stützfläche auf. Die Schneidkanten sind an der Fläche vorgesehen, die der Stützfläche abgewandt ist. Die radial äußere Schneidkante ragt schräg nach oben und nach außen über die Stirnfläche des Grundkörpers hinaus. Die andere Schneidkante ist an der Schrägfläche der Stufe abgestützt. Die Verbindung zwischen Grundkörper und Schneidkopf erfolgt einmal durch Anlage des Schneidkopfs an der Stützfläche und der Schrägfläche der Stufe sowie durch einen Schraubbolzen. Zum anderen ist aber auf der Stützfläche ein pyramidenstumpfförmiger Vorsprung angeformt. Der Schneidkopf weist eine dazu komplementäre, pyramidenstumpfförmige Ausnehmung auf. Der Schneidkopf wird mit seiner Ausnehmung auf den Vorsprung aufgesetzt. Der Schraubbolzen erstreckt sich durch Ausnehmung und Vorsprung. Gegenüberliegende Seitenflächen der Pyramide sind dabei nach den Schneidkanten ausgerichtet.The disclosed U.S. patent application US 2004/0056129 A1 shows a two-piece hammer for shredders with a main body and a crushing or cutting head. The main body has a portion of greater thickness, which forms a pivot bearing at its end. With this pivot bearing, the mallet is pivotally mounted on a rotor. At this section of greater thickness is followed to the outside, ie away from the pivot axis, a portion of lesser thickness. This forms on its front side a substantially planar, approximately radially to the pivot axis extending support surface. Between the support surface and the surface of the portion of greater thickness, a step is formed with an inclined surface. On the support surface sits a cutting head of approximately trapezoidal cross-section. The cutting head forms cutting edges with the acute angles of the trapezoidal cross section. In this case, the cutting head sits with its rear surface corresponding to the narrower trapezoidal edge on the support surface. The cutting edges are provided on the surface facing away from the support surface. The radially outer cutting edge projects obliquely upwards and outwards beyond the end face of the main body. The other cutting edge is supported on the inclined surface of the step. The connection between the body and the cutting head is made once by conditioning the cutting head on the support surface and the inclined surface of the step and by a bolt. On the other hand, but on the support surface a truncated pyramidal projection is formed. The cutting head has a complementary, truncated pyramidal recess. The cutting head is placed with its recess on the projection. The bolt extends through recess and projection. Opposing side surfaces of the pyramid are aligned with the cutting edges.

Bei einer solchen Anordnung müssen sehr starke Kräfte und Momente über den Schneidkopf auf den Gründkörper übertragen werden, wenn die weit außen jenseits des Grundkörpers liegende Schneidkante mit starkem Impuls auf ein zu zerkleinerndes Teil auftrifft. Bei dem Schlegel nach der US 2004/0056129 A1 ist der Schneidkopf gerade an der Stelle, wo im wesentlichen die Kräfte und Momente auf den Grundkörper übertragen werden, durch die pyramidenstumpfförmige Ausnehmung und die mit dieser fluchtenden Ausnehmung für den Kopf des Bolzens geschwächt. Das kann im Dauerbetrieb zu einem Bruch des Schneidkopfs führen, was die Lebensdauer des Schlegels begrenzt.In such an arrangement, very strong forces and moments must be transmitted via the cutting head to the base body when the cutting edge located far beyond the base body impinges with strong momentum on a part to be crushed. At the Schlegel after the US 2004/0056129 A1 is the cutting head just at the point where essentially the forces and moments are transmitted to the body, weakened by the truncated pyramidal recess and aligned with this recess for the head of the bolt. This can lead to breakage of the cutting head in continuous operation, which limits the life of the blade.

Die JP 11076851 offenbart einen Schlegel umfassend einen Grundkörper mit einem Schneidkopf, der mit einer Verbindungsschraube an dem Grundkörper befestigt ist. Der Schneidkopf verfügt über Schneidkanten und ist mit einem Ansatz versehen, welcher in eine komplementäre Vertiefung in dem Grundkörper ragt. Dieser Ansatz und die Vertiefung dienen dazu, den Schneidkörper an dem Grundköper zu zentrieren, um den Schneidkörper in die richtige Position zu bringen. Kräfte und Momente können durch eine solche Verbindung nur sehr bedingt von dem Schneidkopf auf den Grundkörper übertragen werden.The JP 11076851 discloses a mallet comprising a base body with a cutting head fixed to the base body with a connecting screw. The cutting head has cutting edges and is provided with a projection which projects into a complementary recess in the main body. This approach and the recess serve to center the cutting body on the base body to bring the cutting body in the correct position. Forces and moments can be transmitted only to a very limited extent by the cutting head to the base body by such a connection.

Die DE 201 20 185 U1 beschreibt einen Schläger für einen Hammerbrecher. Der Schläger besteht aus einem Grundkörper und einem mit dem Grundkörper lösbar verbundenen Schlagkörper. Der Schlagkörper wird in einer rechteckigen Vertiefung in den Grundkörper eingesetzt. Bei diesen Schlägern kann es jedoch leicht passieren, dass die Kanten verschleißen und sich die Schlagkörper nicht mehr problemlos austauschen lassen. Beim Einsetzen kann es zudem schnell zu einem Verkanten kommen. Gerade bei den Hammerbrechern sind die Schlagkörper großen Kräften und Momenten ausgesetzt, so dass es zu Verformungen auch des Grundköpers kommen kann.The DE 201 20 185 U1 describes a racket for a hammer crusher. The racket consists of a base body and a releasably connected to the body shock body. The impactor is inserted in a rectangular recess in the body. With these clubs, however, it can easily happen that the edges wear out and the impactors can no longer easily be exchanged. When inserting it can also quickly lead to tilting. Especially at The hammer crushers are the impactors exposed to great forces and moments, so that it can lead to deformation of the Grundköpers.

Die WO 02/055203 A1 offenbart einen Vorsprung am Grundkörper, welcher als Pyramidenstumpf ausgebildet ist. Dieser Pyramidenstumpf greift in eine komplementäre Vertiefung des Schneidkopfs. Der Schneidkopf selbst sitzt aber nicht in einer die Vertiefung in der Stützfläche des Grundkörpers. Die Aufnahme von Kräften und Momenten auf den Grundkörper kann nur bedingt erfolgen.The WO 02/055203 A1 discloses a projection on the base body, which is designed as a truncated pyramid. This truncated pyramid engages in a complementary depression of the cutting head. The cutting head itself is not sitting in a recess in the support surface of the body. The absorption of forces and moments on the body can only be limited.

Der Erfindung liegt die Aufgabe zugrunde, einen Schlegel der vorliegenden Art zu schaffen, der eine erhöhte Lebensdauer besitzt und eine bessere Aufnahme der auf die Schneidkante wirkenden Kräfte durch den stabilen Grundkörper gewährleistet.The invention has for its object to provide a flail of the present type, which has an increased life and ensures better absorption of the forces acting on the cutting edge forces through the stable body.

Ausgehend von einem Schlegel der eingangs genannten Art wird diese durch die Merkmale der unabhängigen Ansprüche 1 und 9 gelöst. Demnach ist vor allem die Vertiefung in der Stützfläche des Grundkörpers flach vierseitig- pyramidenstumpfförmig, wobei zwei gegenüberliegenden Seitenflächen des Pyramidenstumpfes sich in Längsrichtung des Grundkörpers erstrecken und die beiden anderen gegenüberliegenden Seitenflächen parallel zu den Schneidkanten angeordnet sind; die komplementären Strukturen von einer pyramidenstumpfförmigen Vertiefung in der Stützfläche des Grundkörpers und einem entsprechend pyramidenstumpfförmigen Ansatz des Schneidkopfs gebildet ist.Based on a hammer of the type mentioned this is achieved by the features of the independent claims 1 and 9. Accordingly, especially the recess in the support surface of the body is flat quadrilateral truncated pyramid, wherein two opposite side surfaces of the truncated pyramid extend in the longitudinal direction of the body and the other two opposite side surfaces are arranged parallel to the cutting edges; the complementary structures of a truncated pyramid-shaped depression in the support surface of the base body and a corresponding truncated pyramid-shaped projection of the cutting head is formed .

Es ist also nicht eine Ausnehmung in dem Schneidkopf vorgesehen, sondern der Schneidkopf weist einen Ansatz auf. Damit wird eine Schwächung des relativ dünnen Schneidkopfs vermieden. Im Gegenteil: Der Schneidkopf wird durch den Ansatz und damit zusätzliches Material verstärkt. Die zu dem Ansatz komplementäre Ausnebroung ist in dem massiveren Grundkörper vorgesehen. Der Grundkörper kann und sollte massiver ausgebildet sein. Der Grundkörper unterliegt relativ geringem Verschleiß, braucht also nicht oder nicht häufig ausgetauscht zu werden. Der Grundkörper sollte eine erhebliche Masse aufweisen, um die Schlagwirkung zu erhöhen. Der Schneidkopf besteht in der Regel aus härterem Material. Er ist an der Schneidkante -unabhängig von einer Bruchgefahr- starken Verschleiß unterworfen und muß häufig ausgetauscht werden. Der Schneidkopf sollte daher nicht unnötig viel Material enthalten und lediglich eine saubere Kraftübertragung auf den Grundkörper gewährleisten.So it is not a recess provided in the cutting head, but the cutting head has a lug. For a weakening of the relatively thin cutting head is avoided. On the contrary: The cutting head is reinforced by the approach and thus additional material. The Ausnebroung complementary to the approach is provided in the solid body. The main body can and should be made solid. The body is subject to relatively little wear, so it does not need to be replaced or not often. The body should have a significant mass to increase the impact. The cutting head is usually made of harder material. He is at the cutting edge -independent of one Risk of breakage and subject to frequent replacement. The cutting head should therefore not contain unnecessarily much material and only ensure a clean power transmission to the body.

Ausgestaltungen der Erfindung mit weiteren vorteilhaften Maßnahmen sind Gegenstand der Unteransprüche.Embodiments of the invention with further advantageous measures are the subject of the dependent claims.

Ein Ausführungsbeispiel der Erfindung ist nachstehend unter Bezugnahme auf die zugehörigen Zeichnungen näher erläutert.

Fig.1
zeigt einen Längsschnitt eines Schlegels für Rotorschredder.
Fig.2
zeigt eine Ansicht des Schlegels von oben in Fig.1 gesehen.
Fig.3
zeigt eine Ansicht des Schneidkopfs von unten in Fig.1 gesehen.
Fig.4
zeigt eine Ansicht des Grundkörpers von oben gesehen, wobei der Schneidkopf entfernt ist.
An embodiment of the invention is explained below with reference to the accompanying drawings.
Fig.1
shows a longitudinal section of a Schelsel for shredders.
Fig.2
shows a view of the bowl from above in Fig.1 seen.
Figure 3
shows a view of the cutting head from below in Fig.1 seen.
Figure 4
shows a view of the body seen from above, with the cutting head is removed.

Der Schlegel 10 weist zwei miteinander verbundene Teile auf, einen Grundkörper 12 und einen Schneidkopf 14. Der Grundkörper 12 ist langgestreckt. Der Grundkörper weist an einem Ende eine Bohrung 16 für ein Schwenklager auf. Mittels dieses Schwenklagers ist der Schlegel -zusammen mit anderen gleichartigen Schlegeln- an einem Rotor anlenkbar.The mallet 10 has two interconnected parts, a main body 12 and a cutting head 14. The main body 12 is elongated. The main body has at one end a bore 16 for a pivot bearing. By means of this pivot bearing the flail-together with other similar flails-can be articulated on a rotor.

Der Grundkörper 12 bildet eine Stützfläche für den Schneidkopf 14. Die Stützfläche ist generell mit 18 bezeichnet. Wie aus Fig.1 und 4 ersichtlich ist, bildet die Stützfläche 18 anschließend an den die Bohrung 16 enthaltenden, verdickten Endteil des Grundkörpers 12 eine Stufe mit einer Schrägfläche 20. Daran anschließend bildet die Stützfläche 18 eine flache, vierseitig-pyramidenstumpfförmige Vertiefung 22. Die Grundfläche des Pyramidenstumpfes ist rechteckig mit zwei Längsseiten 24,26, die sich in Längsrichtung des Schlegels 10 längs der Seitenflächen des Grundkörpers 12 erstrecken und zwei Querseiten 28 und 30, die sich quer über die gesamte Breite des Grundkörpers 12 erstrecken. Die Querseite 28 bildet die Grenze zwischen der Schrägfläche 20 und der Vertiefung 22. Die Querseite 30 bildet im wesentlichen die äußere, vordere Kante des Grundkörpers 12. Die flache Vertiefung 22 bildet vier aneinander anschließende trapezförmige Flächen 32, 34, 36 und 38, von denen sich die Flächen 32 und 34 längs des Grundkörpers 12 und die Flächen 36 und 38 quer über den Grundkörper 12 erstrecken. Anschließend an diese flache Vertiefung 22 und zentral zu dieser bildet die Stützfläche eine steilere und tiefere, ebenfalls vierseitig-pyramidenförmige Vertiefung 40. Die Grundfläche des die Vertiefung 40 definierenden Pyramidenstumpfes ist quadratisch, wobei die Seiten des Quadrats nach den Längsseiten des Grundkörpers 10 bzw. quer zu diesen ausgerichtet sind. Die Vertiefung 40 weist einen planen Boden 42 auf. Zentral zu dem Boden 42 ist durch den Grundkörper 12 hindurch eine Bohrung 44 vorgesehen. Das vordere Ende des Grundkörpers 12 bildet eine abgerundete Stirnfläche 46. Die Stirnfläche 46 springt bezogen auf die Achse 48 der Bohrung 16 von einer Vorderkante 50 zurück, d.h. der Abstand der Stirnfläche 46 von der Achse 48 wird von vorn nach hinten stetig geringer.The base body 12 forms a support surface for the cutting head 14. The support surface is generally designated 18. How out Fig.1 and 4 can be seen, the support surface 18 then forms the bore 16 containing, thickened end portion of the body 12 a step with an inclined surface 20. Subsequently, the support surface 18 forms a flat, four-sided truncated pyramidal depression 22. The base of the truncated pyramid is rectangular with two Longitudinal sides 24,26 which extend in the longitudinal direction of the baffle 10 along the side surfaces of the base body 12 and two transverse sides 28 and 30 which extend across the entire width of the base body 12. The transverse side 28 forms the boundary between the inclined surface 20 and the Recess 22. The transverse side 30 forms substantially the outer, front edge of the base body 12. The shallow recess 22 forms four adjoining trapezoidal surfaces 32, 34, 36 and 38, of which the surfaces 32 and 34 along the base body 12 and the Surfaces 36 and 38 extend across the body 12. Subsequent to this shallow recess 22 and centrally to this, the support surface forms a steeper and deeper, also four-sided pyramidal recess 40. The base of the depression 40 defining truncated pyramid is square, the sides of the square to the longitudinal sides of the body 10 and transverse are aligned to these. The recess 40 has a flat bottom 42. Central to the bottom 42 through the base 12 through a bore 44 is provided. The front end of the base body 12 forms a rounded end face 46. The end face 46 jumps back relative to the axis 48 of the bore 16 of a front edge 50, ie the distance of the end face 46 of the axis 48 is steadily lower from front to back.

Es wird hier angenommen, daß der (nicht dargestellte) Rotor entgegen dem Uhrzeigersinn in Fig.1 umläuft. Der Schlegel bewegt sich also, wenn man Fig.1 als eine Momentaufnahme betrachtet, von unten nach oben in Fig.1. Dementsprechend werden hier die in Fig.1 oberen Flächen als vordere und die in Fig.1 unteren Flächen als hintere Flächen bezeichnet. "Innen" bedeutet auf der Seite der Schwenkachse 48, "außen" bedeutet auf der Seite des freien Endes des Schlegels 10 oder diesem Ende zugewandt.It is assumed here that the rotor (not shown) counterclockwise in Fig.1 circulates. The Schlegel moves so, if you Fig.1 viewed as a snapshot, from bottom to top in Fig.1 , Accordingly, here in Fig.1 upper surfaces as the front and the in Fig.1 lower surfaces referred to as rear surfaces. "Inside" means on the side of the pivot axis 48, "outside" means on the side of the free end of the bracket 10 or facing this end.

Auf der Stützfläche 18 ist der Schneidkopf 14 befestigt. Der Schneidkopf 14 ist symmetrisch zu seiner Längsmittelebene 52 als auch zu einer dazu senkrechten Ebene 54 ausgebildet. Die Rückseite des Schneidkopfs 14 ist im wesentlichen komplementär zu der Stützfläche 22 des Grundkörpers. Diese Rückseite ist in Fig.3 dargestellt und generell mit 56 bezeichnet.On the support surface 18 of the cutting head 14 is attached. The cutting head 14 is formed symmetrically to its longitudinal center plane 52 and to a plane 54 perpendicular thereto. The rear side of the cutting head 14 is substantially complementary to the support surface 22 of the base body. This back is in Figure 3 represented and generally designated 56.

Die Rückseite 56 des Schneidkopfs 14 weist zwei plane Schrägflächen 58 und 60 auf.. Diese Schrägflächen bilden die inneren bzw. äußeren Stirnflächen des Schneidkopfs 14. Die Schrägfläche 58 erstreckt sich in Fig.1 von links oben nach rechts unten. Die Schrägfläche 60 erstreckt sich symmetrisch hierzu von rechts oben nach links unten in Fig.1. Anschließend an die Schrägflächen 58 und 60 bildet die Rückseite 56 des Schneidkopfs 14 eine flache, vierseitig-pyramidenstumpfförmige Erhebung 62 mit zwei trapezförmigen Seitenflächen 64 und 66 in Längsrichtung des Schlegels 10 und zwei trapezförmigen Seitenflächen 68 und 70 quer dazu. Die Seitenflächen 68 und 70 schließen sich an die Schrägflächen 58 bzw. 60 an. Die aneinander angrenzenden kürzeren Parallelseiten 72, 74, 76, 78 der Trapeze schließen aneinander an und bilden ein Quadrat. Dieses Quadrat ist die Grundfläche eines steileren und höheren vierseitig-pyramidenstumpfförmigen Vorsprungs 80. Zentral durch den Vorsprung 80 erstreckt sich eine Bohrung 82, welche im montierten Zustand mit der Bohrung 44 des Grundkörpers fluchtet und den gleichen Durchmesser besitzt wie diese.The rear 56 of the cutting head 14 has two planar inclined surfaces 58 and 60 .. These oblique surfaces form the inner and outer end faces of the cutting head 14. The inclined surface 58 extends into Fig.1 from top left to bottom right. The inclined surface 60 extends symmetrically thereto from top right to bottom left in Fig.1 , Subsequent to the inclined surfaces 58 and 60 forms the back 56 of the Cutting head 14 a flat, four-sided truncated pyramidal projection 62 with two trapezoidal side surfaces 64 and 66 in the longitudinal direction of the bracket 10 and two trapezoidal side surfaces 68 and 70 transversely thereto. The side surfaces 68 and 70 are adjacent to the inclined surfaces 58 and 60, respectively. The adjacent shorter parallel sides 72, 74, 76, 78 of the trapeze join each other and form a square. This square is the base of a steeper and higher four-sided truncated pyramidal projection 80. Centrally through the projection 80 extends a bore 82 which is aligned in the mounted state with the bore 44 of the body and has the same diameter as this.

Die Vorderseite des Schneidkopfs 14 (oben in Fig.1) ist aus Fig.1 und 2 ersichtlich. Die Vorderseite des Schneidkopfs 14 weist zwei zu der Ebene 54 symmetrische, rechteckige, im wesentlichen plane Flächen 84 und 86 auf. Die Seiten der Flächen 84 und 86 sind nach der Längs- und Querrichtung des Schlegels ausgerichtet. Die Ebenen der planen Flächen 84 und 86 bilden einen stumpfen Winkel. Die Flächen 84 und 86 steigen also von der Symmetrieebene weg nach vorn hin bis zu den Stirnflächen 58 bzw. 60 an. Zwischen den Flächen 84 und 86 ist eine plane Fläche 88 senkrecht zu der Achse 90 der Bohrungen 44 und 82 gebildet. Die Vorderseite des Schneidkopfs 14 bildet somit eine flache, von den Flächen 84, 88 und 86 begrenzte Rinne. In der mittleren Fläche 88 ist zentriert zu der Achse 90 eine sechseckige Vertiefung 92 vorgesehen, welche um die Bohrung 82 herum eine Schulter 94 bildet.The front of the cutting head 14 (top in Fig.1 is off Fig.1 and 2 seen. The front side of the cutting head 14 has two symmetrical to the plane 54, rectangular, substantially planar surfaces 84 and 86. The sides of the surfaces 84 and 86 are aligned with the longitudinal and transverse directions of the flail. The planes of the planar surfaces 84 and 86 form an obtuse angle. The surfaces 84 and 86 thus rise away from the plane of symmetry towards the front to the end faces 58 and 60, respectively. Between the surfaces 84 and 86, a flat surface 88 is formed perpendicular to the axis 90 of the bores 44 and 82. The front of the cutting head 14 thus forms a flat, bounded by the surfaces 84, 88 and 86 channel. Centered in the central area 88, centered about the axis 90, is a hexagonal recess 92 which forms a shoulder 94 around the bore 82.

Durch die Bohrungen 82 und 44 erstreckt sich ein Schraubbolzen 96 mit einem sechskantigen Kopf 98. Der Kopf 98 ist in der Vertiefung 92 gehalten und sitzt auf der Schulter 94 auf. Der Durchmesser des Schafts 100 ist etwas kleiner als der Innendurchmesser der Bohrungen 82 und 44. Dadurch wird zwischen den Innenwandungen der Bohrungen 82 und 44 ein Ringspalt 102 gebildet. Der Schraubbolzen 96 ist auf der hinteren Seite des Schlegels 10 durch eine Mutter 104 festgezogen. Die Mutter 104 sitzt in einer Ausnehmung 110 auf der Rückseite des Grundkörpers 12.Through the holes 82 and 44, a bolt 96 extends with a hexagonal head 98. The head 98 is held in the recess 92 and sits on the shoulder 94 on. The diameter of the shaft 100 is slightly smaller than the inner diameter of the bores 82 and 44. As a result, an annular gap 102 is formed between the inner walls of the bores 82 and 44. The bolt 96 is tightened on the rear side of the bracket 10 by a nut 104. The nut 104 is seated in a recess 110 on the rear side of the main body 12.

Der Schneidkopf 14 ist dann so auf der Stützfläche 22 gehaltert, daß die Stirnfläche 58 des Stützkörpers 14 an der Schrägfläche 20 des Grundkörpers anliegt und an dieser abgestützt wird, während die gegenüberliegende Stirnfläche 60 tangential zu der Stirnfläche 46 des Grundkörpers 12 verläuft und sich praktisch an diese anschließt. Der Schneidkopf 14 bildet eine Schneidkante 106 zwischen der Fläche 86 und der Stirnfläche 60. Diese Schneidkante ragt nach vorn und nach außen über den Grundkörper hinaus.The cutting head 14 is then supported on the support surface 22, that the end face 58 of the support body 14 rests against the inclined surface 20 of the base body and at this is supported, while the opposite end face 60 extends tangentially to the end face 46 of the base body 12 and practically adjoins this. The cutting head 14 forms a cutting edge 106 between the surface 86 and the end surface 60. This cutting edge protrudes forward and outwardly beyond the body.

Die beschriebene Konstruktion wirkt wie folgt:
Die Zerkleinerung des Gutes erfolgt im wesentlichen durch die Keilwirkung der vorstehenden Schneidkante. Der Grundkörper liegt in deren "Schatten" und ist daher praktisch keinem Verschleiß unterworfen. Die bei dieser Zerkleinerung auftretenden Reaktionskräfte müssen aber von der Schneidkante auf den Grundkörper abgeleitet werden. Hierzu dient die besondere Form von Grundkörper 12 und Schneidkopf 14. Durch die flache, vierseitig-pyramidenstumpfförmige Vertiefung 22 des Grundkörpers 12 und die dazu komplementäre Erhebung 62 auf der Rückseite des Schneidkopfs 14 wird der Schneidkopf 14 auf der gesamten Auflagefläche sowohl in Längs- als auch in Querrichtung an dem Grundkörper 12 geführt. Das ist besser als bei der US 2004/0056129 A1 , wo der Schneidkopf auf einer Planfläche des Grundkörpers abgestützt ist. Eine formschlüssige Halterung erfolgt hier -anders als bei der vorgenannten US 2004/0056129 A1 - durch einen pyramidenstumpfförmigen Vorsprung 80 des Schneidkopfs 14, der in eine Vertiefung 40 des Grundkörpers eingreift. Dadurch wird der Schneidkopf verstärkt und nicht geschwächt. Der Schraubbolzen 96 ist frei durch die Bohrungen 82 und 44 geführt und wird daher nur auf Zug beim Zusammenziehen von Schneidkopf und Grundkörper und nicht auf Scherung beansprucht.The construction described works as follows:
The comminution of the material takes place essentially by the wedging action of the projecting cutting edge. The body lies in their "shadow" and is therefore practically not subject to wear. However, the reaction forces occurring in this comminution must be derived from the cutting edge to the base body. Due to the flat, four-sided truncated pyramidal recess 22 of the body 12 and the complementary survey 62 on the back of the cutting head 14 of the cutting head 14 on the entire support surface in both longitudinal and guided in the transverse direction on the base body 12. That's better than the one US 2004/0056129 A1 where the cutting head is supported on a plane surface of the base body. A positive retention takes place here -anders than in the aforementioned US 2004/0056129 A1 - By a truncated pyramidal projection 80 of the cutting head 14 which engages in a recess 40 of the base body. As a result, the cutting head is reinforced and not weakened. The bolt 96 is guided freely through the holes 82 and 44 and is therefore claimed only to train when contraction of the cutting head and body and not to shear.

Wenn eine Schneidkante 106 verschlissen ist, kann der Schneidkopf nach Lösen des Schraubbolzens 96 um 180° umgesetzt und mit der anderen Schneidkante 108 weiterverwendet werden.If a cutting edge 106 is worn, the cutting head can be implemented by 180 ° after loosening the bolt 96 and continue to be used with the other cutting edge 108.

Claims (10)

  1. A beater (10) for rotor shredder, comprising an oblong base body (12) with a pivot bearing by means of which the beater (10) is pivoted on a rotor around an axis of rotation (48) parallel to the rotor axis and a support surface (18) extending to the free end of the base body (12); a cutting head (14) with protruding cutting edges (106,108) on opposite ends supported on the base body (12) via the support surface (18) and complementary interlocking structures (40,80) provided by the support surface (18) and cutting head (14); and releasable connection means (96) passing through the complementary structures (40,80) and connecting the base body (12) and cutting head (14), the complementary structures being formed by a recess (40) formed in the support surface (18) of the base body (12) and a thereto complementary projection (80) of the cutting head (14) and the support surface (18) of the base body (12) being formed by a shallow recess (22) with respect to said complementary structures in which the thereto complementary surface (62) of the cutting head (14) facing the base body (12) is held; characterized in that the recess (22) in the support surface (18) of the base body (12) is a shallow four-sided pyramidal frustum, whereby two opposing surfaces of the pyramidal frustum extend in the longitudinal direction of the base body (12) and the two other opposing side surfaces are arranged parallel to the cutting edges; the complementary structures are formed by a frustopyramidal recess (40) in the support surface (18) of the base body (12) and a corresponding frustopyramidal projection (80) of the cutting head (14).
  2. A beater according to Claim 1, characterized in that the recess (40) and the projection (80) form regular four-sided pyramids, whereby two opposing sides of the pyramid bases are perpendicular to the longitudinal direction of the base body (10) and parallel to the cutting edges (106,108) of the cutting head (14).
  3. A beater according to one of Claims 1 to 2, characterized in that the cutting edges (106,108) of a front side (84,86) facing away from the base body and formed by the rear side (56), which faces towards the base body and is complementary to the support surface (18), and a face surface (58,60) of the cutting head (14) which connects the front side and the rear side and extends at an angle out of the support surface (18), whereby the outer cutting edge (106) protrudes radially with respect to the axis of rotation (48) of the beater (10) over the base body (12), and the inner cutting edge (108) lies on an inclined step (20) of the support surface (18).
  4. A beater according to Claim 3, characterized in that
    (a) the front side of the cutting head (14) has two planar surfaces (84,86), whose planes intersect to form an obtuse angle that opens forward in the direction of rotation and between which a planar strip (88) is restricted so that the front side has the shape of a shallow groove, and
    (b) the connection means have a threaded bolt (96) that passes through the planar strip (88), the projection (80), the complementary recess (40), and through the base body (12) and is tightened by a nut (104).
  5. A beater according to Claim 4, characterized in that a polygon-shaped recess (92), into which the polygon head (98) of the threaded bolt (96) fits, is in the center of the planar strip (88).
  6. A beater according to Claim 5, characterized in that the side of the base body (12) opposite the head (98) of the threaded bolt (96) forms a recess (110), into which the nut (104) fits and which protects the nut (104).
  7. A beater according to Claim 5 or 6, characterized in that
    (a) the outer diameter of the threaded bolt (96) is smaller than the inner diameter of the holes (82,44), and
    (b) the shank (100) of the threaded bolt (96) is retained in the center of the holes (82,44) by the head (94) and the recess (94) through the formation of an annular gap (102).
  8. A beater according to one of Claims 3 to 7, characterized in that the outer face surface (60) of the cutting head (14) extends primarily tangential to the radial inwardly curved face surface (46) of the base body (12) opposite the axis of rotation (48).
  9. A cutting head (14) for placement on a base body (12) of a beater (10) for rotor shredders, whereby the cutting head (14) is provided with protruding cutting edges (106,108) on opposite ends and can be supported on the base body (12) via a support surface (18) of the base body and via complementary interlocking structures (40,80) provided on the support surface (18) and the cutting head (14), whereby the complementary structures have a projection (80) of the cutting head (14) to engage in the recess (40) formed in the support surface (18) of the base body (12), whereby the rear side (56) of the cutting head (14) has two flat inclined surfaces (58, 60) and the inclined surfaces (58, 60) form the inner and outer face surfaces of the cutting head (14); the inclined surface (58) extends from the upper left to the lower right and the inclined surface (60) extends symmetrically thereto from the upper right to the lower left; adjacent to the inclined surfaces (58, 60), the rear side (56) of the cutting head (14) forms a flat, four-sided frustopyramidal protrusion (62) with two trapezoidal side surfaces (64, 66) in the longitudinal direction of the beater (10) and two trapezoidal side surfaces (68, 70) perpendicular thereto; the side surfaces (68, 70) connect to the inclined surfaces (58, 60); the shorter parallel sides (72, 74, 76, 78) of the trapezoid are adjacent to each other and form a square, whereby the square is the base surface of a steeper and higher four-sided frustopyramidal projection (80) through which a hole (82) extends, which in the mounted state aligns with a hole (44) of the base body and has the same diameter as the hole (44).
  10. Cutting head according to Claim 9, characterized in that the projection (80) forms a regular four-sided pyramid, whereby two opposing sides of the pyramid base surfaces extend parallel to the cutting edges (106,108) of the cutting head (14).
EP06754951.9A 2005-05-17 2006-05-02 Beater for rotor shredders Active EP1888241B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005023339A DE102005023339A1 (en) 2005-05-17 2005-05-17 Flails for rotary shredders
PCT/EP2006/061966 WO2006122874A1 (en) 2005-05-17 2006-05-02 Beater for rotor shredders

Publications (2)

Publication Number Publication Date
EP1888241A1 EP1888241A1 (en) 2008-02-20
EP1888241B1 true EP1888241B1 (en) 2019-02-27

Family

ID=36688113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06754951.9A Active EP1888241B1 (en) 2005-05-17 2006-05-02 Beater for rotor shredders

Country Status (5)

Country Link
US (1) US7568645B2 (en)
EP (1) EP1888241B1 (en)
CA (1) CA2609261C (en)
DE (1) DE102005023339A1 (en)
WO (1) WO2006122874A1 (en)

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DE202007013269U1 (en) 2007-09-20 2009-02-12 Doppstadt Familienholding Gmbh Mallets for crushers
US7975949B2 (en) * 2008-07-25 2011-07-12 Gregory Kurt Orphall Hammer assembly for a rotary material crusher
DE202010014030U1 (en) 2010-10-08 2012-01-09 Doppstadt Familienholding Gmbh Mallets with a cutting insert and a base body
DE202010014029U1 (en) * 2010-10-08 2012-01-09 Doppstadt Familienholding Gmbh Mallets with split flail tip
US9186022B1 (en) * 2010-10-11 2015-11-17 Blendtec, Inc. Mixing blade for blending apparatus and methods
US9038933B2 (en) 2011-03-31 2015-05-26 Gil Fredsall Cutter assembly for grinding and crushing machines
US10335798B2 (en) 2011-03-31 2019-07-02 Gil Fredsall Cutter assembly for grinding and crushing machines with replaceable cutting edges
DE102011085520B4 (en) * 2011-10-31 2017-05-04 General Electric Technology Gmbh Hammer of a beater mill
US11292148B2 (en) * 2015-09-22 2022-04-05 Deere & Company Cutting device tooth mounting arrangement
CN112203770B (en) 2018-05-23 2023-01-03 维米尔制造公司 Chopping machine for crushing bulk material

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DE2943456A1 (en) * 1979-10-27 1982-02-18 Maschinenfabrik B. Maier Kg, 4800 Bielefeld Shredder for bark and annual plants - has rotor-fitted swinging impact elements with radially tapered cutting edges
AU595434B2 (en) * 1987-03-06 1990-03-29 Kabushiki Kaisha Kobe Seiko Sho (Also Known As Kobe Steel, Ltd) Impact crushing machine
DE29708025U1 (en) * 1997-05-06 1997-06-26 Kronenberger, Ernst Josef, Dipl.-Ing., 66706 Perl Shredding elements for shredder rotors in the form of hammers or flails
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DE10101434C1 (en) * 2001-01-13 2002-07-25 Werner Doppstadt Umwelttechnik Flail arrangement for rotor shredders
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Also Published As

Publication number Publication date
CA2609261A1 (en) 2006-11-23
US7568645B2 (en) 2009-08-04
EP1888241A1 (en) 2008-02-20
US20080142625A1 (en) 2008-06-19
DE102005023339A1 (en) 2006-11-30
CA2609261C (en) 2013-06-25
WO2006122874A1 (en) 2006-11-23

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