EP0224836B1 - Impact bar for impact crushers or similar crushers - Google Patents

Impact bar for impact crushers or similar crushers Download PDF

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Publication number
EP0224836B1
EP0224836B1 EP19860116276 EP86116276A EP0224836B1 EP 0224836 B1 EP0224836 B1 EP 0224836B1 EP 19860116276 EP19860116276 EP 19860116276 EP 86116276 A EP86116276 A EP 86116276A EP 0224836 B1 EP0224836 B1 EP 0224836B1
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EP
European Patent Office
Prior art keywords
arm according
protuberance
beating arm
rotor
working
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19860116276
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German (de)
French (fr)
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EP0224836A2 (en
EP0224836A3 (en
Inventor
Hermann Schrödl
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SCHROEDL, HERMANN
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Individual
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Publication of EP0224836A2 publication Critical patent/EP0224836A2/en
Publication of EP0224836A3 publication Critical patent/EP0224836A3/en
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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
    • B02C13/2804—Shape or construction of beater elements the beater elements being rigidly connected to the rotor

Definitions

  • the invention relates to a blow bar for impact crusher or the like. Comminution machines with the features according to the preamble of claim 1.
  • the invention is therefore based on the object to avoid these disadvantages and to provide a generic blow bar, which is characterized by its durable connection between the work tool and the base body in a low-effort construction and thereby enables the best splitting performance and long service life.
  • the invention solves this problem in that the mounting rail or mounting rails are arranged on the work tools and the rail head-like extension is rounded off in a mushroom-like manner. In this way, a particularly good holding of the work tools in the base body is achieved on the one hand with simple means and on the other hand an improvement in the comminution effect with reduction of wear is ensured. Because the mounting rails are molded onto the work tools and the grooves in the base body, there is no weakening of the tool cross-section and the mushroom-like rounded extensions of the mounting rails avoid losses in strength due to the notch effect and local stress peaks. The interlocking of the rounded extensions and correspondingly rounded grooves also allows relatively large manufacturing tolerances without fear of tearing out the holder.
  • the protruding mounting rails also bring with them a self-centering mounting, because when rotating the tool is moved relative to the base body in such a way that the back of the work tool lies against the base body and the mushroom-like extension nestles into the groove over a large area. Tearing out the tool is impossible and additional fasteners, such as screw bolts and the like, are unnecessary.
  • the interaction of the rounded rail heads and the rounded grooves also prevents the work tools from lying hollow on the base body, so that there is also no risk of breakage as a result of bending stresses during impact loads and the like. gives.
  • at least some of the work tools can have at least one protruding, strip-like elevation extending radially approximately over the height of the work tool, whereby not only a longer service life of the work tool is achieved in that there are no significant bending moments and shear forces acting transversely to these elevations , but also the splitting effect of the blow bar is significantly improved.
  • the splitting effect is further improved.
  • splitting crushed material is favored by this design and by the fact that the increase - based on the rotor cross section - runs within the bend pointing approximately in the direction of the rotor axis. Further advantages with regard to the splitting effect and the material flow result from the fact that the strip-like projection extending over at least part of the length of the working tool is designed in a cutting-like manner and also because the increase in the working tool is arranged in the center and the starting strength is based from the increase, decreases. This prevents the protrusion from breaking away, even under heavy loads.
  • the wear resistance of the blow bar is increased in that at least some of the work tools are provided on the front surface with an applied layer of wear-resistant material. It is particularly advantageous that at least part of the strip-like elevation and projections is formed from a hard material.
  • the particularly wear-resistant metallic alloys come into consideration as wear-resistant material, which in the known way, e.g. Cladding can be applied. The same also applies to the hard material to be applied, generally referred to as hard metal, which can also be glued on and dissolved. It is also possible to increase the adhesive effect by anchoring the wear-resistant material in the work tool, particularly on its front surface, e.g. through corresponding recesses in the work tool.
  • a symmetrical base body 2 is provided on both sides with a constriction in the region of its plane of symmetry, which is formed by a tangential axis X, into which retaining rails 38 and 39 arranged on a disk of the rotor engage in such a way that Support surfaces 36 and 37 running at an angle to the axis X absorb the radial forces.
  • the - based on the direction of rotation of the rotor - on the back of the base body 2 on the outside of the support surface 36 is adjoined by a support surface 34 arranged on the rotor 40, on which the back of the base body 2 of the blow bar 1 rests and thereby absorbs the tangential forces .
  • a component of the pair of forces formed from the tangential load is introduced into the rotor 40 via a support surface 35 which lies obliquely opposite the support surface 34 beyond the axis X.
  • the surfaces 34 and 35 run parallel to one another and form the width of the base body 2, the plane Y of which lies in the middle and runs through the rotor axis of rotation 42.
  • Another surface 34a, which adjoins the front oblique support surface 36, runs parallel to the support surface 34 and lies in the same plane as the support surface 35.
  • the working tool 3 has two mounting rails 14 and 15, each of which is provided with a mushroom-like rounded head-like extension 16 and 17 in relation to the cross section.
  • the enlargement 16 or 17 is followed by a narrowing 18 or 19 formed by a rounding on both sides.
  • the curves of the extensions and constrictions merge into one another and form concave or convex curved outer surfaces running in the longitudinal direction of the working tool 3.
  • the mounting rails 14 and 15 are arranged in the region of the rear of the work tool 3.
  • the working tool 3 consists of a carrier body 4, on which a layer 7 of wear-resistant material is applied to its front surface 5 and its top surface 6.
  • a narrow strip-like elevation 8 which extends approximately from the cover surface 6, radially in the direction of the center of the rotor, extends over the entire height of the working tool and forms two cutting edges 9A and 9B. Accordingly, the elevation 8 consists of two parts 5A and 5B, which run at a relatively large obtuse angle to one another, at the apex of which an edge 13 provided with a tip extends.
  • the part 5B of the elevation 8 which lies within the edge 13 with respect to the rotor cross section and which projects by the dimension R of the front surface 5 extends approximately in the direction of the rotor axis 42, the part 5a which lies between the edge 13 and the top surface 6 the increase 8 angled backwards accordingly.
  • the elevation 8, as can be seen from FIG. 3, is arranged centrally in the work tool 3. By cutting the top surface 6 with the inclined front surface 5A, an edge 12 is also created in cross section.
  • the basic body 2 belonging to the exemplary embodiment according to FIGS. 1 to 3 is shown separately in FIG. 7.
  • the support surface arranged on the rotor 40 includes the support surface 30 arranged on the rear side of the base body 2, which extends from the inclined support surface 33, which rests on the support surface 36, to close to the outer end of the base body 2.
  • the groove 22 belongs to the mounting rail 14 and the groove 23 belongs to the mounting rail 15, the two grooves being duplicated due to the symmetry of the base body 2. In the event of breakage or wear of the outer part of the base body 2, the latter can thus be turned over.
  • the constrictions 18 and 19 of the mounting rails 14 and 15 include corresponding constrictions 28 and 29 of the grooves 22 and 23.
  • the support surfaces 37 include corresponding opposite support surfaces 32, while the support surface 34A includes a support surface 31A.
  • the support surfaces 32 take the place of the support surfaces 33 and the support surface 31A takes the place of the support surface 31 and vice versa.
  • a constriction surface 26 adjoins the constriction 28, which supports the rear of the work tools 3 against tangential forces.
  • the constriction 29 merges into a subsequent support surface 27, on which a surface 21 (FIG. 2), which is arranged on the underside facing the rotor center, bears.
  • FIG. 4 shows a further exemplary embodiment with work tools 3A modified compared to the exemplary embodiment according to FIG. 1 and a base body 2A likewise modified, which is shown separately in FIG. 8.
  • the base body 2A also has a support surface 30, which again bears against the support surface 34 of the rotor 40A, and two inclined support surfaces 32 and 33, which abut the counter surfaces 36 and 37, which are held by the holding rails 38 and 39 of the rotor 40A.
  • the width B of the base body 2A of this blow bar 1A again extends from the contact surfaces 31 or 31 A to the contact surface 30.
  • the working tool 3A is again provided on its rear side with two mounting rails, of which only the mounting rail 14A which is closer to the center of the rotor in the installed state has a rail-head-like extension 16A provided with a mushroom-like curvature which engages in a correspondingly shaped groove 24 in the base body 2A.
  • a mounting rail 19 is provided on the work tool 3A, which has an approximately square cross section and fits into a correspondingly shaped groove 25 of the base body 2A.
  • a slightly curved surface 20 adjoins the mounting rail 19 on the outside and, in operation, is pressed against a correspondingly curved support surface 26A on the base body 2A.
  • the front surface 5 of the working tool 3A is again provided with a radial strip-like elevation 8 which is convexly curved on the outside by being angled several times in its length and thereby forming adjoining cutting edges 9A, 9B and 9C.
  • the outermost cutting edge 9A which is assigned to the surface part 5A, is followed by an edge 12 and to this again a cover surface 6, which is slightly inclined towards the rear of the working tool.
  • the working tool 3A furthermore has a strip-like projection 10, which is provided with a cutting edge 11 and is offset inwards relative to the outer edge 12 by a certain amount, which is characterized by the dimension h.
  • the projection 10 has the width k at its foot and runs parallel to the longitudinal extent of the blow bar.
  • the protruding thickness s of the protrusion 10 is less than the maximum height of the elevation 8 which protrudes from the front surface 5 by the dimension R.
  • the maximum height R lies in the area of the cutting edge 11 of the projection 10.
  • an outwardly curved surface 21 is arranged on the underside 18A of the mounting rail 14A, which rests on a correspondingly curved supporting surface 27 of the base body 2A.
  • the elevation 8 is arranged centrally in the work tool 3A.
  • FIG. 9 shows a further embodiment of a base body 2B, which is provided for receiving the work tool 3 shown in FIG. 2 and is accordingly provided with grooves 22 and 23 and support surfaces 26 and 27.
  • the work tools 2A and 2B shown in Figs. 8 and 9 are not intended to be reversed and therefore have only grooves for receiving a number of work tools.
  • 7 to 9 show certain distances from the axis X running tangentially in the constriction or in the holding rails 38 and 39.
  • Y1 is the maximum distance of the surface 30
  • Y2 is the maximum distance from the surface 26 or 26A
  • Y3 is the minimum distance of the lower mounting groove 23 or 24 from this axis.
  • Y1 In order for the tangential forces to be introduced into the rotor 40 or 40A without changing the direction, Y1 must be greater than Y3.
  • Y1 is also equal to or less than Y2.
  • a base body 2C is provided with a mounting rail 14B which engages in a correspondingly shaped groove in work tools 3B. Otherwise, the base body 2C is again provided on its rear side with a support surface 30 which adjoins the support surface 34 of the rotor, and is held again in the holding rails 38 and 39 of the rotor via support surfaces 36 and 37.
  • the base body 2C is provided with work tools 3B, which together form the blow bar 1B.

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

Description

Die Erfindung bezieht sich auf eine Schlagleiste für Prallbrecher od.dgl. Zerkleinerungsmaschinen mit den Merkmalen nach dem Oberbegriff des Anspruches 1.The invention relates to a blow bar for impact crusher or the like. Comminution machines with the features according to the preamble of claim 1.

Bei solchen Schlagleisten kommt es neben der Forderung nach einer guten Spaltwirkung und einer großen Verschleißfestigkeit der Arbeitswerkzeuge selbst vor allem auf die Stärke und Dauerhaftigkeit der Verbindung zwischen Arbeitswerkzeug und Grundkörper an, um die gewünschte Standzeit erzielen zu können. Wie die GB-A 2 153 704 oder auch die DE-C 956 188 zeigen, werden bisher die Arbeitswerkzeuge mittels einer Schwalbenschwanz-Halterung am Grundkörper befestigt, wobei die scharfwinkelige Nut im Arbeitswerkzeug vorgesehen ist. Diese Nut im Werkzeug führt allerdings zu einer beträchtlichen Bruchgefahr, die durch Bohrungen für eine zusätzliche, die Halterung verstärkende Verschraubung noch erhöht wird. Außerdem erfordert die Schwalbenschwanz-Halterung sehr enge Herstellungstoleranzen und läßt ohne Verschraubung bei zu großem Spiel sogar ein Herausreißen des Arbeitswerkzeuges befürchten. Die Einsatzfähigkeit dieser bekannten Schlagleisten hinsichtlich Rotordrehzahlen und Spaltwirkung bleibt daher zwangsweise von vornherein beschränkt.With such blow bars, in addition to the requirement for a good splitting effect and a high wear resistance of the work tools themselves, the strength and durability of the connection between the work tool and the base body are important in order to achieve the desired service life. As GB-A 2 153 704 or DE-C 956 188 show, the work tools have so far been attached to the base body by means of a dovetail holder, the sharp-angled groove being provided in the work tool. However, this groove in the tool leads to a considerable risk of breakage, which is further increased by bores for an additional screw connection which reinforces the holder. In addition, the dovetail bracket requires very tight manufacturing tolerances and can even fear tearing out the work tool without screwing if there is too much play. The usability of these known blow bars with regard to rotor speeds and splitting effect therefore remains restricted from the outset.

Der Erfindung liegt daher die Aufgabe zugrunde, diese Nachteile zu vermeiden und eine gattungsgemäße Schlagleiste zu schaffen, die sich bei aufwandsarmer Konstruktion durch ihre dauerfeste Verbindung zwischen Arbeitswerkzeug und Grundkörper auszeichnet und dadurch beste Spaltleistungen und hohe Standzeiten ermöglicht.The invention is therefore based on the object to avoid these disadvantages and to provide a generic blow bar, which is characterized by its durable connection between the work tool and the base body in a low-effort construction and thereby enables the best splitting performance and long service life.

Die Erfindung löst diese Aufgabe dadurch, daß die Halterungsschiene bzw. Halterungsschienen an den Arbeitswerkzeugen angeordnet sind und die schienenkopfartige Erweiterung etwa pilzartig abgerundet ist. So wird mit einfachen Mitteln einerseits eine besonders gute Halterung der Arbeitswerkzeuge im Grundkörper erreicht und anderseits für eine Verbesserung der Zerkleinerungswirkung bei Reduktion des Verschleißes gesorgt. Da nämlich die Halterungsschienen an den Arbeitswerkzeugen angeformt sind und die Nuten in den Grundkörpern, gibt es keine Schwächung des Werkzeugquerschnittes und die pilzartig abgerundeten Erweiterungen der Halterungsschienen vermeiden Festigkeitseinbußen durch Kerbwirkung und örtliche Spannungsspitzen. Das Ineinandergreifen der abgerundeten Erweiterungen und entsprechend ausgerundeten Nuten erlaubt darüber hinaus relativ große Fertigungstoleranzen, ohne dadurch ein Ausreißen der Halterung befürchten zu müssen. Die vorkragenden Halterungsschienen bringen weiters eine selbstzentrierende Halterung mit sich, denn bei Rotation wird das Werkzeug relativ zum Grundkörper so bewegt, daß sich der Rücken des Arbeitswerkzeuges gegen den Grundkörper anlegt und sich die pilzartige Erweiterung großflächig übergreifend in die Nut einschmiegt. Ein Ausreißen des Werkzeuges ist ausgeschlossen und zusätzliche Befestigungsmittel, wie Schraubenbolzen u.dgl., werden unnötig.The invention solves this problem in that the mounting rail or mounting rails are arranged on the work tools and the rail head-like extension is rounded off in a mushroom-like manner. In this way, a particularly good holding of the work tools in the base body is achieved on the one hand with simple means and on the other hand an improvement in the comminution effect with reduction of wear is ensured. Because the mounting rails are molded onto the work tools and the grooves in the base body, there is no weakening of the tool cross-section and the mushroom-like rounded extensions of the mounting rails avoid losses in strength due to the notch effect and local stress peaks. The interlocking of the rounded extensions and correspondingly rounded grooves also allows relatively large manufacturing tolerances without fear of tearing out the holder. The protruding mounting rails also bring with them a self-centering mounting, because when rotating the tool is moved relative to the base body in such a way that the back of the work tool lies against the base body and the mushroom-like extension nestles into the groove over a large area. Tearing out the tool is impossible and additional fasteners, such as screw bolts and the like, are unnecessary.

Das Zusammenwirken der abgerundeten Schienenköpfe und der ausgerundeten Nuten verhindert außerdem ein Hohlliegen der Arbeitswerkzeuge am Grundkörper, so daß es auch keine Bruchgefahr infolge von Biegespannungen bei Schlagbelastungen u.dgl. gibt. Erfindungsgemäß kann daher mindestens ein Teil der Arbeitswerkzeuge wenigstens eine vorstehende, sich radial etwa über die Höhe des Arbeitswerkzeuges erstreckende leistenartige Erhöhung aufweisen, wodurch nicht nur eine größere Standzeit des Arbeitswerkzeuges dadurch erzielt wird, daß keine nennenswerten, quer zu diesen Erhöhungen wirkenden Biegemomente und Scherkräfte entstehen, sondern darüber hinaus auch die Spaltwirkung der Schlagleiste erheblich verbessert wird.The interaction of the rounded rail heads and the rounded grooves also prevents the work tools from lying hollow on the base body, so that there is also no risk of breakage as a result of bending stresses during impact loads and the like. gives. According to the invention, therefore, at least some of the work tools can have at least one protruding, strip-like elevation extending radially approximately over the height of the work tool, whereby not only a longer service life of the work tool is achieved in that there are no significant bending moments and shear forces acting transversely to these elevations , but also the splitting effect of the blow bar is significantly improved.

Ist die Erhöhung schneidenartig ausgebildet und steht sie gegenüber der mit einem leistenartigen Vorsprung versehenen Arbeitskante an der Vorderfläche vor, wird die Spaltwirkung noch weiter verbessert.If the elevation is cut-like and protrudes from the working edge provided with a strip-like projection on the front surface, the splitting effect is further improved.

Ein weiterer Vorteil ergibt sich daraus, daß die Erhöhung an der Außenseite konvex gewölbt ist, da so die Keilwirkung der durch die dahinterliegenden Bauteile abgestützten Erhöhung noch verbessert wird. Ferner dringt die Erhöhung in das Brechgut noch leichter ein, wenn sie etwa im Bereich des Vorsprungs abgewinkelt ist, so daß sie dort die Spitze eines - stumpfen - Winkels bildet. Auch das Abfließen des sich an den Erhöhungen und Vorsprüngen des Arbeitswerkzeuge:Another advantage results from the fact that the elevation on the outside is convex, since the wedge effect of the elevation supported by the components behind it is thus further improved. Furthermore, the elevation penetrates the crushed material more easily if it is angled approximately in the region of the projection, so that it forms the tip of an - obtuse - angle there. Also the draining off of the ridges and protrusions of the working tools:

spaltenden Brechguts wird durch diese Ausbildung und dadurch, daß die Erhöhung - bezogen auf den Rotorquerschnitt - innerhalb der Abwinkelung etwa in Richtung auf die Rotorachse weisend verläuft, begünstigt. Weitere Vorteile im Hinblick auf die Spaltwirkung und den Materialfluß ergeben sich daraus, daß der sich über mindestens einen Teil der Länge des Arbeitswerkzeuges erstreckende leistenartige Vorsprung schneidenartig ausgebildet ist und ferner dadurch daß die Erhöhung im Arbeitswerkzeug mittig angeordnet ist und der Vorsprung in seiner Stärke, ausgehend von der Erhöhung, abnimmt. Auf diese Weise wird ein Ausbrechen des Vorsprungs auch bei großer Belastung vermieden.splitting crushed material is favored by this design and by the fact that the increase - based on the rotor cross section - runs within the bend pointing approximately in the direction of the rotor axis. Further advantages with regard to the splitting effect and the material flow result from the fact that the strip-like projection extending over at least part of the length of the working tool is designed in a cutting-like manner and also because the increase in the working tool is arranged in the center and the starting strength is based from the increase, decreases. This prevents the protrusion from breaking away, even under heavy loads.

Die Verschleißfestigkeit der Schlagleiste wird dadurch erhöht, daß zumindest ein Teil der Arbeitswerkzeuge an der Vorderfläche mit einer aufgebrachten Schicht aus verschleißfestem Material versehen ist. Dabei ist es besonders vorteilhaft, daß zumindest ein Teil der leistenartigen Erhöhung und Vorsprünge aus einem Hartstoff gebildet ist. Als verschleißfestes Material kommen die besonders verschleißfesten metallischen Legierungen in Betracht, die auf die bekannte Weise, z.B. Auftragsschweißung aufgebracht werden können. Das gleiche gilt auch für den aufzubringenden Hartstoff, allgemein als Hartmetall bezeichnet, der auch aufgeklebt und aufgelöst werden kann. Außerdem ist es möglich, die Haftwirkung dadurch zu vergrößern, daß das verschleißfeste Material im Arbeitswerkzeug, insbesondere an dessen Vorderfläche besonders verankert wird, z.B. durch entsprechende Ausnehmungen im Arbeitswerkzeug.The wear resistance of the blow bar is increased in that at least some of the work tools are provided on the front surface with an applied layer of wear-resistant material. It is particularly advantageous that at least part of the strip-like elevation and projections is formed from a hard material. The particularly wear-resistant metallic alloys come into consideration as wear-resistant material, which in the known way, e.g. Cladding can be applied. The same also applies to the hard material to be applied, generally referred to as hard metal, which can also be glued on and dissolved. It is also possible to increase the adhesive effect by anchoring the wear-resistant material in the work tool, particularly on its front surface, e.g. through corresponding recesses in the work tool.

In der Zeichnung sind mehrere Ausführungsbeispiele der Schlagleiste nach der Erfindung schematisch dargestellt und nachfolgend näher erläutert. Es zeigen

  • Fig. 1 eine Ausführungsform einer in einem Rotor gehaltenen Schlagleiste im Schnitt quer zur Rotorachse,
  • Fig. 2 das Arbeitswerkzeug nach Fig. 1 in Ansicht von der Stirnseite, Fig. 3 mehrere aneinander anschließende Arbeitskörper nach Fig. 2 in Ansicht in Richtung des Pfeiles 111 in Fig. 2,
  • Fig. 4 - 6 eine weitere Ausführungsform der Schlagleiste nach der Erfindung in den Fig. 1 bis 3 entsprechenden Darstellungen in gleicher Reihenfolge,
  • Fig. 7 - 9 drei verschiedene Grundkörper der Schlagleiste im Querschnitt und
  • Fig. 10 eine weitere Ausführungsform der Schlagleiste im eingebauten Zustand im Schnitt zur Rotorachse.
In the drawing, several embodiments of the blow bar according to the invention are shown schematically and explained in more detail below. Show it
  • 1 shows an embodiment of a blow bar held in a rotor in cross section to the rotor axis,
  • 2 shows the work tool according to FIG. 1 in a view from the end face, FIG. 3 shows a plurality of adjoining work bodies according to FIG. 2 in a view in the direction of the arrow 111 in FIG. 2,
  • 4 - 6 a further embodiment of the blow bar according to the invention in FIGS. 1 to 3 corresponding representations in the same order,
  • 7 - 9 three different basic bodies of the blow bar in cross section and
  • Fig. 10 shows another embodiment of the blow bar in the installed state in section to the rotor axis.

Wie aus Fig. 1 hervorgeht, ist ein symmetrischer Grundkörper 2 im Bereich seiner Symmetrieebene, die durch eine tangentiale Achse X gebildet wird, beidseitig mit einer Einschnürung versehen, in welche an einer Scheibe des Rotors 40 angeordnete Halteschienen 38 und 39 jeweils so eingreifen, daß schräg zur Achse X verlaufende Stützflächen 36 und 37 die radialen Kräfte aufnehmen. An die - bezogen auf die Drehrichtung des Rotors - an der Rückseite des Grundkörpers 2 an der Außenseite liegende Stützfläche 36 schließt sich eine am Rotor 40 angeordnete Stützfläche 34 an, an welcher die Rückseite des Grundkörpers 2 der Schlagleiste 1 anliegt und dadurch die tangentialen Kräfte aufnimmt. Eine Komponente des aus der tangentialen Belastung gebildeten Kräftepaars wird über eine Stützfläche 35, die der Stützfläche 34 jenseits der Achse X schräg gegenüberliegt, in den Rotor 40 eingeleitet. Die Flächen 34 und 35 verlaufen zueinander parallel und bilden die Breite des Grundkörpers 2, dessen mittig dazwischenliegende Ebene Y durch die Rotordrehachse 42 verläuft. Eine weitere Fläche 34a, die an die vordere schräge Stützfläche 36 anschließt, verläuft parallel zur Stützfläche 34 und liegt in der gleichen Ebene wie die Stützfläche 35.As can be seen from FIG. 1, a symmetrical base body 2 is provided on both sides with a constriction in the region of its plane of symmetry, which is formed by a tangential axis X, into which retaining rails 38 and 39 arranged on a disk of the rotor engage in such a way that Support surfaces 36 and 37 running at an angle to the axis X absorb the radial forces. The - based on the direction of rotation of the rotor - on the back of the base body 2 on the outside of the support surface 36 is adjoined by a support surface 34 arranged on the rotor 40, on which the back of the base body 2 of the blow bar 1 rests and thereby absorbs the tangential forces . A component of the pair of forces formed from the tangential load is introduced into the rotor 40 via a support surface 35 which lies obliquely opposite the support surface 34 beyond the axis X. The surfaces 34 and 35 run parallel to one another and form the width of the base body 2, the plane Y of which lies in the middle and runs through the rotor axis of rotation 42. Another surface 34a, which adjoins the front oblique support surface 36, runs parallel to the support surface 34 and lies in the same plane as the support surface 35.

Wie aus Fig. 2 zu entnehmen ist, weist das Arbeitswerkzeug 3 zwei Halterungsschienen 14 und 15 auf, die jeweils mit einer - bezogen auf den Querschnitt - pilzartig abgerundeten schienenkopfartigen Erweiterung 16 und 17 versehen sind. An die Erweiterung 16 bzw. 17 schließt sich eine durch eine beidseitige Rundung gebildete Verengung 18 bzw. 19 jeweils an. Die Rundungen der Erweiterungen und Verengungen gehen jeweils ineinander über und bilden konkav bzw. konvex gekrümmte in Längsrichtung des Arbeitswerkzeugs 3 verlaufende Außenflächen. Die Halterungsschienen 14 und 15 sind im Bereich der Rückseite des Arbeitswerkzeugs 3 angeordnet. Das Arbeitswerkzeug 3 besteht aus einem Trägerkörper 4, auf den eine Schicht 7 aus verschleißfestem Material an ihrer Vorderfläche 5 und ihrer Deckfläche 6 aufgebracht ist. Aus der Vorderfläche 5 ragt in Drehrichtung weisend, eine etwa von der Deckfläche 6, radial in Richtung zur Rotormitte etwa über die gesamte Höhe des Arbeitswerkzeugs sich erstreckende schmale leistenartige Erhöhung 8 vor, welche zwei Schneiden 9A und 9B bildet. Dementsprechend besteht die Erhöhung 8 aus zwei Teilen 5A und 5B, die in einem relativ großen stumpfen Winkel zueinander verlaufen, in dessen Scheitelpunkt eine mit einer Spitze versehene Kante 13 verläuft. Während der bezogen auf den Rotorquerschnitt innerhalb der Kante 13 liegende Teil 5B der Erhöhung 8, der um das Maß R der Vorderfläche 5 vorsteht, etwa in Richtung auf die Rotorachse 42 weisend verläuft, ist der zwischen der Kante 13 und der Deckfläche 6 liegende Teil 5a der Erhöhung 8 entsprechend nach hinten abgewinkelt. Die Erhöhung 8 ist, wie aus Fig. 3 ersichtlich, im Arbeitswerkzeug 3 mittig angeordnet. Durch den Schnitt der Deckfläche 6 mit der geneigt verlaufenden Vorderfläche 5A entsteht im Querschnitt außerdem eine Kante 12.As can be seen from FIG. 2, the working tool 3 has two mounting rails 14 and 15, each of which is provided with a mushroom-like rounded head-like extension 16 and 17 in relation to the cross section. The enlargement 16 or 17 is followed by a narrowing 18 or 19 formed by a rounding on both sides. The curves of the extensions and constrictions merge into one another and form concave or convex curved outer surfaces running in the longitudinal direction of the working tool 3. The mounting rails 14 and 15 are arranged in the region of the rear of the work tool 3. The working tool 3 consists of a carrier body 4, on which a layer 7 of wear-resistant material is applied to its front surface 5 and its top surface 6. From the front surface 5, pointing in the direction of rotation, a narrow strip-like elevation 8, which extends approximately from the cover surface 6, radially in the direction of the center of the rotor, extends over the entire height of the working tool and forms two cutting edges 9A and 9B. Accordingly, the elevation 8 consists of two parts 5A and 5B, which run at a relatively large obtuse angle to one another, at the apex of which an edge 13 provided with a tip extends. While the part 5B of the elevation 8 which lies within the edge 13 with respect to the rotor cross section and which projects by the dimension R of the front surface 5 extends approximately in the direction of the rotor axis 42, the part 5a which lies between the edge 13 and the top surface 6 the increase 8 angled backwards accordingly. The elevation 8, as can be seen from FIG. 3, is arranged centrally in the work tool 3. By cutting the top surface 6 with the inclined front surface 5A, an edge 12 is also created in cross section.

Der zum Ausführungsbeispiel nach den Fig. 1 bis 3 gehörende Grundkörper 2 ist gesondert in Fig. 7 dargestellt. Hier sind insbesondere die Gegenflächen zu den in Fig. 1 und 2 bezeichneten Flächen freigelegt dargestellt und bezeichnet. Zu der am Rotor 40 angeordneten Stützfläche gehört die an der Rückseite des Grundkörpers 2 angeordnete Auflagefläche 30, die von der schrägen Auflagefläche 33, die an der Stützfläche 36 anliegt, bis nahe an das äußere Ende des Grundkörpers 2 reicht. Zur Halterungsschiene 14 gehört die Nut 22 und zur Halerungsschiene 15 die Nut 23, wobei die beiden Nuten infolge der Symmetrie des Grundkörpers 2 doppelt vorhanden sind. Im Falle eines Bruchs oder Verschleißes des außenliegenden Teils des Grundkörpers 2 kann dieser somit umgedreht werden. Zu den Verengungen 18 und 19 der Halterungsschienen 14 und 15 gehören entsprechende Verengungen 28 und 29 der Nuten 22 und 23. Zu den Stützflächen 37 gehören entsprechende gegenüberliegende Auflagenflächen 32, während zur Stützfläche 34A eine Auflagefläche 31 A gehört. Beim beschriebenen Umkehren des Grundkörpers 2 treten die Auflageflächen 32 an die Stelle der Auflagenflächen 33 und die Auflagenfläche 31A an die Stelle der Auflagefläche 31 und umgekehrt. An die Verengung 28 schließt sich nach außen hin eine Stützfläche 26 an, welche die Rückseite der Arbeitswerkzeuge 3 gegen tangentiale Kräfte abstützt. Ferner geht die Verengung 29 in eine anschließende Stützfläche 27 über, an der eine an der zur Rotormitte hin gerichteten Unterseite an den Arbeitswerkzeugen 3 angeordnete Fläche 21 (Fig. 2) anliegt.The basic body 2 belonging to the exemplary embodiment according to FIGS. 1 to 3 is shown separately in FIG. 7. Here, in particular, the counter surfaces to the surfaces designated in FIGS. 1 and 2 are shown and labeled exposed. The support surface arranged on the rotor 40 includes the support surface 30 arranged on the rear side of the base body 2, which extends from the inclined support surface 33, which rests on the support surface 36, to close to the outer end of the base body 2. The groove 22 belongs to the mounting rail 14 and the groove 23 belongs to the mounting rail 15, the two grooves being duplicated due to the symmetry of the base body 2. In the event of breakage or wear of the outer part of the base body 2, the latter can thus be turned over. The constrictions 18 and 19 of the mounting rails 14 and 15 include corresponding constrictions 28 and 29 of the grooves 22 and 23. The support surfaces 37 include corresponding opposite support surfaces 32, while the support surface 34A includes a support surface 31A. When the base body 2 is reversed, the support surfaces 32 take the place of the support surfaces 33 and the support surface 31A takes the place of the support surface 31 and vice versa. A constriction surface 26 adjoins the constriction 28, which supports the rear of the work tools 3 against tangential forces. Furthermore, the constriction 29 merges into a subsequent support surface 27, on which a surface 21 (FIG. 2), which is arranged on the underside facing the rotor center, bears.

Fig. 4 zeigt ein weiteres Ausführungsbeispiel mit gegenüber dem Ausführungsbeispiel nach Fig. 1 geänderten Arbeitswerkzeugen 3A und einem ebenfalls geänderten Grundkörper 2A, der in Fig. 8 gesondert dargestellt ist. Der Grundkörper 2A weist aber ebenfalls eine Auflagefläche 30, die wieder an der Stützfläche 34 des Rotors 40A anliegt, sowie jeweils zwei schräge Auflageflächen 32 und 33 auf, die an den Gegenflächen 36 und 37 anliegen, welche durch die Halteschienen 38 und 39 des Rotors 40A gebildet werden. Die Breite B des Grundkörpers 2A dieser Schlagleiste 1A reicht wieder von den Auflageflächen 31 bzw. 31 A bis zur Auflagefläche 30.FIG. 4 shows a further exemplary embodiment with work tools 3A modified compared to the exemplary embodiment according to FIG. 1 and a base body 2A likewise modified, which is shown separately in FIG. 8. However, the base body 2A also has a support surface 30, which again bears against the support surface 34 of the rotor 40A, and two inclined support surfaces 32 and 33, which abut the counter surfaces 36 and 37, which are held by the holding rails 38 and 39 of the rotor 40A. The width B of the base body 2A of this blow bar 1A again extends from the contact surfaces 31 or 31 A to the contact surface 30.

Das Arbeitswerkzeug 3A ist an seiner Rückseite ebenfalls wieder mit zwei Halterungsschienen versehen, von der aber nur die im Einbauzustand näher zur Rotormitte liegende Halterungsschiene 14A eine mit einer pilzartigen Rundung versehene schienenkopfartige Erweiterung 16A aufweist, die in eine entsprechend geformte Nut 24 im Grundkörper 2A eingreift. Weiter außenliegend ist eine Halterungs schiene 19 am Arbeitswerkzeug 3A vorgesehen, die einen annähernd quadratischen Querschnitt aufweist und in eine entsprechend geformte Nut 25 des Grundkörpers 2A paßt. An die Halterungsschiene 19 schließt sich nach außen eine leicht gewölbte Fläche 20 an, die im Betrieb gegen eine entsprechend gewölbte Stützfläche 26A am Grundkörper 2A gepreßt wird. Die Vorderfläche 5 des Arbeitswerkzeugs 3A ist wieder mit einer radialen leistenartigen Erhöhung 8 versehen, die an der Außenseite konvex dadurch gewölbt ist, daß sie in ihrer Länge mehrfach abgewinkelt ist und dabei aneinander anschließende Schneiden 9A, 9B und 9C bildet. An die äußerste Schneide 9A, die dem Flächenteil 5A zugeordnet ist, schließt sich wieder eine Kante 12 und an diese wieder eine Deckfläche 6, die leicht zur Rückseite des Arbeitswerkzeugs hin geneigt ist, an. An der Vorderfläche 5 weist das Arbeitswerkzeug 3A ferner einen leistenartigen Vorsprung 10 auf, der mit einer Schneide 11 versehen ist und einen gewissen Betrag, der durch das Maß h gekennzeichnet ist, gegenüber der außenliegenden Kante 12 nach innen versetzt ist. Der Vorsprung 10 hat an seinem Fuß die Breite k und verläuft parallel zur Längserstreckung der Schlagleiste. Die vorspringende Stärke s des Vorsprungs 10 ist geringer als die maximale Höhe der Erhöhung 8, die um das Maß R gegenüber der Vorderfläche 5 vorsteht. Die maximale Höhe R liegt dabei im Bereich der Schneide 11 des Vorsprungs 10. An der Unterseite des Arbeitswerkzeugs 3A ist anschließend an die Verengung 18A der Halterungsschiene 14A eine nach außen gewölbte Fläche 21 angeordnet, die an einer entsprechend gewölbten Stützfläche 27 des Grundkörpers 2A anliegt. In Fig. 6 ist erkennbar, daß die Erhöhung 8 im Arbeitswerkzeug 3A mittig angeordnet ist.The working tool 3A is again provided on its rear side with two mounting rails, of which only the mounting rail 14A which is closer to the center of the rotor in the installed state has a rail-head-like extension 16A provided with a mushroom-like curvature which engages in a correspondingly shaped groove 24 in the base body 2A. Farther out, a mounting rail 19 is provided on the work tool 3A, which has an approximately square cross section and fits into a correspondingly shaped groove 25 of the base body 2A. A slightly curved surface 20 adjoins the mounting rail 19 on the outside and, in operation, is pressed against a correspondingly curved support surface 26A on the base body 2A. The front surface 5 of the working tool 3A is again provided with a radial strip-like elevation 8 which is convexly curved on the outside by being angled several times in its length and thereby forming adjoining cutting edges 9A, 9B and 9C. The outermost cutting edge 9A, which is assigned to the surface part 5A, is followed by an edge 12 and to this again a cover surface 6, which is slightly inclined towards the rear of the working tool. On the front surface 5, the working tool 3A furthermore has a strip-like projection 10, which is provided with a cutting edge 11 and is offset inwards relative to the outer edge 12 by a certain amount, which is characterized by the dimension h. The projection 10 has the width k at its foot and runs parallel to the longitudinal extent of the blow bar. The protruding thickness s of the protrusion 10 is less than the maximum height of the elevation 8 which protrudes from the front surface 5 by the dimension R. The maximum height R lies in the area of the cutting edge 11 of the projection 10. On the underside of the working tool 3A, an outwardly curved surface 21 is arranged on the underside 18A of the mounting rail 14A, which rests on a correspondingly curved supporting surface 27 of the base body 2A. In Fig. 6 it can be seen that the elevation 8 is arranged centrally in the work tool 3A.

Fig. 9 zeigt eine weitere Ausführungsform eines Grundkörpers 2B, der zur Aufnahme des in Fig. 2 dargestellten Arbeitswerkzeugs 3 vorgesehen ist, und dementsprechend mit Nuten 22 und 23 und Stützflächen 26 und 27 versehen ist. Die Arbeitswerkzeuge 2A und 2B, die in Fig. 8 und 9 dargestellt sind, sind nicht zum Umkehren bestimmt und weisen deshalb nur Nuten zur Aufnahme einer Reihe von Arbeitswerkzeugen auf. In den Fig. 7 bis 9 sind bestimmte Abstände von der in der Einschnürung, bzw. in den Halteschienen 38 und 39 tangential verlaufenden Achse X dargestellt. Dabei ist Y1 der maximale Abstand der Fläche 30, Y2 der maximale Abstand von der Fläche 26 bzw. 26A und Y3 der minimale Abstand der unteren Halterungsnut 23 bzw. 24 von dieser Achse. Damit die Tangentialkräfte in den Rotor 40 bzw. 40A ohne Richtungsänderung eingeleitet werden, muß Y1 größer als Y3 sein. Y1 ist ferner gleich oder kleiner als Y2.FIG. 9 shows a further embodiment of a base body 2B, which is provided for receiving the work tool 3 shown in FIG. 2 and is accordingly provided with grooves 22 and 23 and support surfaces 26 and 27. The work tools 2A and 2B shown in Figs. 8 and 9 are not intended to be reversed and therefore have only grooves for receiving a number of work tools. 7 to 9 show certain distances from the axis X running tangentially in the constriction or in the holding rails 38 and 39. Y1 is the maximum distance of the surface 30, Y2 is the maximum distance from the surface 26 or 26A and Y3 is the minimum distance of the lower mounting groove 23 or 24 from this axis. In order for the tangential forces to be introduced into the rotor 40 or 40A without changing the direction, Y1 must be greater than Y3. Y1 is also equal to or less than Y2.

Beim weiteren Ausführungsbeispiel nach Fig. 10 ist ein Grundkörper 2C mit einer Halterungsschiene 14B versehen, die jeweils in einer entsprechend geformten Nut von Arbeitswerkzeugen 3B eingreift. Im übrigen ist der Grundkörper 2C an seiner Rückseite wieder mit einer Auflagefläche 30 versehen, die an die Stützfläche 34 des Rotors anschließt, und über Stützflächen 36 und 37 wieder in den Halteschienen 38 und 39 des Rotors gehalten. Der Grundkörper 2C ist mit Arbeitswerkzeugen 3B versehen, welche zusammen die Schlagleiste 1 B bilden.In the further exemplary embodiment according to FIG. 10, a base body 2C is provided with a mounting rail 14B which engages in a correspondingly shaped groove in work tools 3B. Otherwise, the base body 2C is again provided on its rear side with a support surface 30 which adjoins the support surface 34 of the rotor, and is held again in the holding rails 38 and 39 of the rotor via support surfaces 36 and 37. The base body 2C is provided with work tools 3B, which together form the blow bar 1B.

Claims (10)

1. A beating arm (1) for a rebound crusher or similar reducing machinery, the arm comprising a main body (2, 2A, 2B) mounted in the rotor (40, 40A) and a number of working tools (3, 3A) which extend along the length of the main body and have on their front surface a working edge also extending longitudinally, the working tools (3, 3A) being connectable to the main body (2, 2A, 2B) by at least one mounting bar (14, 15; 14A, 19) which extends parallel to the length of the main body, forms at least to some extent on the outside a railhead-like widening (16, 16A, 17) and engages in a correspondingly shaped groove, characterised in that the or each mounting bar (14, 15; 14A, 19) is disposed on the working tools (3, 3A) and the railhead-like widening (16, 16A, 17) is rounded substantially to a mushroom shape.
2. A beating arm according to claim 1, characterised in that at least some of the working tools (3, 3A, 3B) have at least one projecting ridge-like protuberance (8) which extends radially substantially over the height of the tool.
3. A beating arm according to claim 2, charac- terlsed in that the protuberance (8) is of knife edge type ond projects on the front surface (5) relatively to the working edge, the same having a ridge-like projection (10).
4. A beating arm according to claim 3, characterised in that the protuberance (8) is of convex curvature on its outside.
5. A beating arm according to claim 4, characterised in that the protuberance (8) is bent approximately in the region of the projection (10).
6. A beating arm according to claim 5, characterised in that the protuberance (8) extends, as referred to the rotor cross-section, within the bend substantially towards the rotor axis (42).
7. A beating arm according to any claims 3 - 6, characterised in that the ridge-like projection (10) which extends over at least some of the length of the working tool is of the knife edge type.
8. A beating arm according to claim 7, characterised in that the protuberance (8) is disposed centrally in the tool (3, 3A) and the projection (10) decreases in thickness (s) starting from the protuberance (8).
9. A beating arm according to any of claims 1 - 8, characterised in that at least some of the working tools (3, 3A, 3B) on the front surface (5) have a face layer of wear-resistant material.
10. A beating arm according to any of claims 2 - 9, characterised in that at least some of the ridge-like protuberances (8) and projections (10) are made of a hard material.
EP19860116276 1985-12-03 1986-11-24 Impact bar for impact crushers or similar crushers Expired - Lifetime EP0224836B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT3506/85 1985-12-03
AT350685A AT392740B (en) 1985-12-03 1985-12-03 BOW BAR FOR IMPACT CRUSHERS OD. DGL. CRUSHING MACHINES

Publications (3)

Publication Number Publication Date
EP0224836A2 EP0224836A2 (en) 1987-06-10
EP0224836A3 EP0224836A3 (en) 1988-08-03
EP0224836B1 true EP0224836B1 (en) 1990-10-24

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ID=3551451

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860116276 Expired - Lifetime EP0224836B1 (en) 1985-12-03 1986-11-24 Impact bar for impact crushers or similar crushers

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EP (1) EP0224836B1 (en)
AT (1) AT392740B (en)
DE (1) DE3675165D1 (en)

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EP0581758A1 (en) * 1992-07-28 1994-02-02 Hermann Schrödl Impeller bar for impact-mill rotors

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EP3110568B1 (en) * 2014-02-28 2018-12-05 SGM Magnetics S.p.A. Ballistic separator drum for moist materials

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EP0581758A1 (en) * 1992-07-28 1994-02-02 Hermann Schrödl Impeller bar for impact-mill rotors
AT397773B (en) * 1992-07-28 1994-06-27 Schroedl Hermann STRIKE BAR FOR BREAKER ROTORS OD. DGL.
US5395063A (en) * 1992-07-28 1995-03-07 Schroedl; Hermann Hammer bar for use in a rotor of a crusher

Also Published As

Publication number Publication date
ATA350685A (en) 1990-11-15
DE3675165D1 (en) 1990-11-29
EP0224836A2 (en) 1987-06-10
EP0224836A3 (en) 1988-08-03
AT392740B (en) 1991-05-27

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