EP3108070A1 - Concrete jaw crusher - Google Patents

Concrete jaw crusher

Info

Publication number
EP3108070A1
EP3108070A1 EP15706417.1A EP15706417A EP3108070A1 EP 3108070 A1 EP3108070 A1 EP 3108070A1 EP 15706417 A EP15706417 A EP 15706417A EP 3108070 A1 EP3108070 A1 EP 3108070A1
Authority
EP
European Patent Office
Prior art keywords
cutting edge
axis
virtual
concrete
jaw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15706417.1A
Other languages
German (de)
French (fr)
Other versions
EP3108070B1 (en
Inventor
Thomas Ostermeyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gebr Egli Maschinen AG
Original Assignee
Gebr Egli Maschinen AG
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Publication date
Application filed by Gebr Egli Maschinen AG filed Critical Gebr Egli Maschinen AG
Publication of EP3108070A1 publication Critical patent/EP3108070A1/en
Application granted granted Critical
Publication of EP3108070B1 publication Critical patent/EP3108070B1/en
Active legal-status Critical Current
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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/96Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/965Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements of metal-cutting or concrete-crushing implements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/08Wrecking of buildings
    • E04G23/082Wrecking of buildings using shears, breakers, jaws and the like

Definitions

  • the present invention relates to a Betonbrechzan- ge.
  • Concrete crushing pincers in the form of a box scissors are known from the prior art. Such concrete pincers have pliers jaws with sharp corners in the distal area, and the
  • Cutting edges are arranged in a side view substantially in a plane. It has been shown in these concrete pincers that the wear in the area of the corners is disproportionately increased. There occur locally very high mechanical stresses. Constructively, the corners themselves are stiff, but the adjacent walls on the box are softer, resulting in an uneven kerf with poor cutting results.
  • This concrete crusher has a first jaw having a frame-like first base defining an interior of the first jaw and having a first cutting edge, and a second jaw having a second cutting edge and pivotally connected to the first jaw about a hinge axis to immerse in the interior.
  • the first cutting edge consists of two legs, which are essentially mirror-symmetrical to a central axis, which is perpendicular to the hinge axis. The legs further form a distal end portion in the form of a straight edge.
  • the central axis intersects the hinge axis and the distal end portion.
  • the legs form a U-shaped profile in a plan view, which is slightly rounded at the corners with a constant radius of curvature is.
  • This concrete pincers does not have the disadvantages of the aforementioned box scissors, but it is relatively expensive to produce. It is therefore the object of the present invention to provide a concrete pincers, which ensures a uniform cutting gap and which is easier to manufacture and at the same time durable. This object is achieved by the Betonbrechzange with the features of claim 1.
  • Advantageous developments of the present invention are specified in the subclaims.
  • the ellipse shows a better cutting gap, but is more complex to manufacture.
  • the advantages of the concrete pincers are a uniform line of force, a constant stress level in the component, a uniform cutting gap with a pulling cut, less and more uniform wear, easier and less expensive sharpening, a lighter construction of the entire concrete pincers and a separation of the crushing zone, if provided are.
  • Fig. 1 shows an embodiment of a concrete crushing tongs in a perspective view
  • FIG. 2 shows the embodiment of the concrete pincers in another perspective view
  • FIGS. 3 and 4 show the embodiment of the concrete crushing tongs in a side view in the opened or closed state
  • Fig. 5 shows the embodiment of the Betonbrechzange in a sectional view from below
  • Fig. 6 shows in a plan view the course of a cutting edge of a forceps jaw of the concrete crushing pincers according to the embodiment of the present invention.
  • Fig. 7 shows a sketch for explaining a dished bow and a basket bow.
  • FIG. 1 shows an embodiment of a concrete crushing tongs 1 in perspective views or in side views or bottom views.
  • the concrete crushing tongs 1 have a first forceps jaw 2 which has a frame-like first basic body 3 which defines an interior 4 of the first forceps jaw 1 and has a first cutting edge 5.
  • the concrete crushing jaw 1 also has a second jaw 6, which has a second cutting edge 7 and is pivotally connected to the first jaw 2 about a hinge axis 8 to immerse in the interior 4.
  • the cutting process during concrete cutting is u.
  • Cutting edge 5 happens to shear the intervening concrete.
  • the second cutting edge 7 is substantially on. adapted the shape of the first cutting edge 5; but it is smaller because it dips into the interior 4.
  • FIG. 6 shows a plan view (in the xy plane) of the course of the first cutting edge 5 of the first forceps jaw 2 of the concrete crushing jaw 1 according to the exemplary embodiment of the present invention.
  • the description is similar, since the shape of the second cutting edge 7 is adapted to the shape of the first cutting edge 5.
  • the first cutting edge 5 of the first jaw 2 consists of two legs 9, 10 which extend substantially mirror-symmetrically to a central axis 11, which is perpendicular to the hinge axis 8.
  • the legs 9, 10 further form a distal end portion 12 of the first cutting edge 5, wherein the distal end portion 12 in the present embodiment is a punctiform tip 12 of the first cutting edge 5.
  • you can the distal end portion 12 may be a curve of the first cutting edge 5, which may be rectilinear or curved.
  • the legs 9, 10 of the first cutting edge 5 in a plan view perpendicular to the hinge axis 8 and perpendicular to the central axis 11 each have a cutting edge segment with a non-constant radius of curvature.
  • the course of the cutting edge segment in plan view is defined by certain geometric figures as follows.
  • a virtual quarter ellipse is defined by a large semiaxis a, which runs parallel to the articulation axis 8 of the concrete crushing tongs 1, and a small semiaxis b, which ends at the distal end portion 12 of the first cutting edge 5.
  • the small semiaxis b thus extends between a center M of the virtual quarter ellipse and the distal end portion 12 of the first cutting edge 5.
  • a virtual, half dished bow according to DIN 28011 and a virtual, half basket bow according to DIN 28013 are each defined with a radius ra, a Kallote rl, a brim r2 and a board h, wherein the radius ra identical to the large semi-axis a of the virtual Quarter ellipse is and where ends or tips (corresponding to the high points of the whole dipper bow or the whole basket bow) of the virtual, half dovetail and the virtual, half basket arch respectively at the intersection of the quarter ellipse with the distal End portion 12 lie and the board h ends at the large semi-axis a.
  • paddle bow and basket bow are generally defined in corresponding DIN standards and are described in FIG. 7 (derived from Borowski, "vaulted ground”,
  • the cutting edge segment extends between the virtual quarter ellipse and the virtual half half beater arc, and / or extends between the virtual quarter ellipse and the virtual, half basket bow on the side of the hinge axis 8 (ie adjacent to the hinge axis 8) and outside Quarter ellipse and the virtual, half basket bow on the side of the distal end portion 12 of
  • Cutting edge 5 i.e., adjacent to the distal end portion 12 of the cutting edge 5, as exemplified in FIG.
  • the radius of the cutting edge 5 in the region of the Kailote rl is in the illustrated embodiment approximately three times as large as the radius of the cutting edge 5 in the region of the rim r2.
  • the board h has a size which is smaller than two-thirds of the small semi-axis b. More preferably, the board h has a size that is smaller than half of the small semi-axis b. More preferably, the board h has a size which is smaller than one third of the small semi-axis b. It is also conceivable that the board h has a size of zero.
  • the ratio between the major half axis a and the minor half axis b is in a range of 4: 1 to 3: 1, more preferably in a range of 3: 1 to 2: 1, and more preferably in a range of 2: 1 to 1.5: 1.
  • the crusher is shown in a side view (in the yz plane).
  • the first cutting edge 5 in the region of the distal end portion 12 has a straight line section 14, to which an angled or curved portion 15 adjoins the side of the hinge axis 8, which is angled or curved to the side of the other cutting edge 7.
  • the second cutting edge 7 preferably also has a corresponding configuration.
  • crushing teeth 13 are preferably arranged on the first and second forceps jaws 2, 6 for penetration into concrete.
  • the crushing teeth 13 are located when viewed from the hinge axis 8 behind the first cutting edge 5 and before the second cutting edge 7.
  • the crushing teeth 13 penetrate the concrete and split it.
  • the crushing teeth 13 hold the
  • Cutting edges 5, 7 also prevents it from coming into contact with unbroken concrete. After the concrete through the crushing teeth 13 crumbled, the cutting edges 5, 7 can cut out of and removed from the concrete reinforcements.
  • the first and the second cutting edge 5, 7 welded to the corresponding forceps jaw 2, 6.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crushing And Grinding (AREA)

Abstract

A concrete jaw crusher (1) comprises a first jaw (2) having a frame-type first main body (3) which defines an interior (4) of the first jaw (1) and which has a first cutting edge (5), and a second jaw (6) that has a second cutting edge (7) and is connected to the first jaw (2) in such a way as to be able to pivot about a pivot pin (8) and plunge into the interior (4). At least the first cutting edge (5) or the second cutting edge (7) is composed of two sections, each of which includes a cutting edge segment having an irregular radius of curvature.

Description

Betonbrechzange  Concrete-crushing pincers
Die vorliegende Erfindung bezieht sich auf eine Betonbrechzan- ge . The present invention relates to a Betonbrechzan- ge.
Aus dem Stand der Technik sind Betonbrechzangen in Gestalt einer Kastenschere bekannt. Derartige Betonbrechzangen haben Zangenbacken mit scharfen Ecken im distalen Bereich, und die Concrete crushing pincers in the form of a box scissors are known from the prior art. Such concrete pincers have pliers jaws with sharp corners in the distal area, and the
Schneidkanten sind in einer Seitenansicht im Wesentlichen in einer Ebene angeordnet. Es hat sich bei diesen Betonbrechzangen gezeigt, dass der Verschleiß im Bereich der Ecken weit überproportional erhöht ist. Dort treten lokal sehr hohe mechanische Spannungen auf. Konstruktiv sind die Ecken selbst steif, die angrenzenden Wände am Kasten sind jedoch weicher, woraus ein ungleichmäßiger Schnittspalt mit schlechten Schnittergebnissen resultiert . Cutting edges are arranged in a side view substantially in a plane. It has been shown in these concrete pincers that the wear in the area of the corners is disproportionately increased. There occur locally very high mechanical stresses. Constructively, the corners themselves are stiff, but the adjacent walls on the box are softer, resulting in an uneven kerf with poor cutting results.
Aus der WO 96/02708 A ist eine andere Betonbrechzange gemäß dem Oberbegriff von Anspruch 1 bekannt. Diese Betonbrechzange hat eine erste Zangenbacke, die einen rahmenartigen ersten Grundkörper aufweist, der einen Innenraum der ersten Zangenbacke definiert und eine erste Schneidkante aufweist, und eine zweite Zangenbacke, die eine zweite Schneidkante aufweist und mit der ersten Zangenbacke um eine Gelenkachse schwenkbar verbunden ist, um in den Innenraum einzutauchen. Die erste Schneidkante besteht aus zwei Schenkeln, die im Wesentlichen spiegelsymmetrisch zu einer Mittelachse verlaufen, die senkrecht zur Gelenkachse steht. Die Schenkel bilden des Weiteren einen distalen Endabschnitt in Gestalt einer geraden Kante. Die Mittelachse schneidet die Gelenkachse und den distalen Endabschnitt. Die Schenkel bilden in einer Draufsicht ein U-förmiges Profil, das an den Ecken mit konstantem Krümmungsradius leicht abgerundet ist. Diese Betonbrechzange hat nicht die Nachteile der eingangs erwähnten Kastenscheren, sie ist jedoch relativ aufwändig herzustellen . Es ist daher die Aufgabe der vorliegenden Erfindung, eine Betonbrechzange vorzusehen, die für einen gleichmäßigen Schnittspalt sorgt und die einfacher herzustellen und gleichzeitig haltbar ist . Diese Aufgabe wird durch die Betonbrechzange mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen der vorliegenden Erfindung sind in den Unteransprüchen angegeben. From WO 96/02708 A another Betonbrechzange according to the preamble of claim 1 is known. This concrete crusher has a first jaw having a frame-like first base defining an interior of the first jaw and having a first cutting edge, and a second jaw having a second cutting edge and pivotally connected to the first jaw about a hinge axis to immerse in the interior. The first cutting edge consists of two legs, which are essentially mirror-symmetrical to a central axis, which is perpendicular to the hinge axis. The legs further form a distal end portion in the form of a straight edge. The central axis intersects the hinge axis and the distal end portion. The legs form a U-shaped profile in a plan view, which is slightly rounded at the corners with a constant radius of curvature is. This concrete pincers does not have the disadvantages of the aforementioned box scissors, but it is relatively expensive to produce. It is therefore the object of the present invention to provide a concrete pincers, which ensures a uniform cutting gap and which is easier to manufacture and at the same time durable. This object is achieved by the Betonbrechzange with the features of claim 1. Advantageous developments of the present invention are specified in the subclaims.
In Untersuchungen, die zur vorliegenden Erfindung führten, wur- de die Betonbrechzange aus der WO 96/02708 A in mehreren Stufen weitergebildet. Zunächst wurden die Eckradien mit verschiedenen, weiteren Radien anstatt mit einer Geraden verbunden, so dass ein kontinuierlicher Bogen entstand, der das Problem des ungleichmäßigen Schneidspalts weitgehend eliminierte. Dies hat zu weiteren Überlegungen geführt, um die Bogenform zu optimieren. Insbesondere wurden bekannte, mathematisch definierte Bögen mittels FEM Analyse untersucht, nämlich eine Ellipse, ein Klöpperbogen nach DIN 28011 und ein Korbbogen nach DIN 28013. Im Dünnblechbereich funktionieren die beiden letztgenanntenIn investigations leading to the present invention, the concrete pincers from WO 96/02708 A were further developed in several stages. First, the corner radii were connected with different, wider radii instead of a straight line, so that a continuous arc was created, which largely eliminated the problem of uneven cutting gap. This has led to further considerations to optimize the bow shape. In particular, known, mathematically defined sheets were examined by means of FEM analysis, namely an ellipse, a dished bow according to DIN 28011 and a basket bow according to DIN 28013. In thin sheet metal work the latter two
Formen gut, der Schnittspalt kann jedoch noch weiter optimiert werden. Die Ellipse zeigt einen besseren Schnittspalt, ist aber in der Herstellung aufwändiger. Shapes well, but the kerf can be further optimized. The ellipse shows a better cutting gap, but is more complex to manufacture.
Die besten Ergebnisse konnten erzielt werden, wenn die Betonbrechzange gemäß Anspruch 1 ausgebildet wird. Die Vorteile der Betonbrechzange sind ein gleichmäßiger Kraftlinienverlauf, ein konstantes Spannungsniveau im Bauteil, ein gleichmäßiger Schneidspalt bei einem ziehenden Schnitt, weniger und gleichmäßigerer Verschleiß, leichteres und kostengünstige- res Schärfen, eine leichtere Bauweise der gesamten Betonbrechzange und eine Trennung der Brechzone, sofern Zähne vorgesehen sind. The best results could be achieved when the concrete crushing tongs is formed according to claim 1. The advantages of the concrete pincers are a uniform line of force, a constant stress level in the component, a uniform cutting gap with a pulling cut, less and more uniform wear, easier and less expensive sharpening, a lighter construction of the entire concrete pincers and a separation of the crushing zone, if provided are.
KURZBESCHREIBUNG DER ZEICHNUNGEN BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 zeigt ein Ausführungsbeispiel einer Betonbrechzange in einer perspektivischen Ansicht; Fig. 1 shows an embodiment of a concrete crushing tongs in a perspective view;
Fig. 2 zeigt das Ausführungsbeispiel der Betonbrechzange in ei- ner anderen perspektivischen Ansicht; FIG. 2 shows the embodiment of the concrete pincers in another perspective view; FIG.
Figuren 3 und 4 zeigen das Ausführungsbeispiel der Betonbrech- zange in einer Seitenansicht im geöffneten bzw. geschlossenen Zustand; FIGS. 3 and 4 show the embodiment of the concrete crushing tongs in a side view in the opened or closed state;
Fig. 5 zeigt das Ausführungsbeispiel der Betonbrechzange in einer Schnittansicht von unten; Fig. 5 shows the embodiment of the Betonbrechzange in a sectional view from below;
Fig. 6 zeigt in einer Draufsicht den Verlauf einer Schneidkante einer Zangenbacke der Betonbrechzange gemäß dem Ausführungsbeispiel der vorliegenden Erfindung; und Fig. 6 shows in a plan view the course of a cutting edge of a forceps jaw of the concrete crushing pincers according to the embodiment of the present invention; and
Fig. 7 zeigt eine Skizze zur Erläuterung eines Klöpperbogens und eine Korbbogens . Fig. 7 shows a sketch for explaining a dished bow and a basket bow.
BESCHREIBUNG DER AUSFÜHRUNGSBEISPIELE Figuren 1 bis 5 zeigen ein Ausführungsbeispiel einer Betonbrechzange 1 in perspektivischen Ansichten bzw. in Seitenansichten oder Unteransichten. Gemäß der Fig. 1 hat die Betonbrechzange 1 eine erste Zangenbacke 2, die einen rahmenartigen ersten Grundkörper 3 aufweist, der einen Innenraum 4 der ersten Zangenbacke 1 definiert und eine erste Schneidkante 5 aufweist. Die Betonbrechzange 1 hat außerdem eine zweite Zangenbacke 6, die eine zweite Schneidkan- te 7 aufweist und mit der ersten Zangenbacke 2 um eine Gelenkachse 8 schwenkbar verbunden ist, um in den Innenraum 4 einzutauchen. Der Schneidvorgang beim Betonschneiden wird u. A. DESCRIPTION OF THE EMBODIMENTS Figures 1 to 5 show an embodiment of a concrete crushing tongs 1 in perspective views or in side views or bottom views. According to FIG. 1, the concrete crushing tongs 1 have a first forceps jaw 2 which has a frame-like first basic body 3 which defines an interior 4 of the first forceps jaw 1 and has a first cutting edge 5. The concrete crushing jaw 1 also has a second jaw 6, which has a second cutting edge 7 and is pivotally connected to the first jaw 2 about a hinge axis 8 to immerse in the interior 4. The cutting process during concrete cutting is u. A.
dadurch bewirkt, dass die zweite Schneidkante 7 die erste causes the second cutting edge 7, the first
Schneidkante 5 passiert, um den dazwischenliegenden Beton zu scheren. Die zweite Schneidkante 7 ist im Wesentlichen an. die Form der ersten Schneidkante 5 angepasst; sie ist aber kleiner, da sie in den Innenraum 4 eintaucht. Cutting edge 5 happens to shear the intervening concrete. The second cutting edge 7 is substantially on. adapted the shape of the first cutting edge 5; but it is smaller because it dips into the interior 4.
Die Fig. 6 zeigt in einer Draufsicht (in der xy-Ebene) den Ver- lauf der ersten Schneidkante 5 der ersten Zangenbacke 2 der Betonbrechzange 1 gemäß dem Ausführungsbeispiel der vorliegenden Erfindung. Für die zweite Schneidkante 7 der zweiten Zangenbacke 6 ist die Beschreibung ähnlich, da die Form der zweiten Schneidkante 7 an die Form der ersten Schneidkante 5 angepasst ist. FIG. 6 shows a plan view (in the xy plane) of the course of the first cutting edge 5 of the first forceps jaw 2 of the concrete crushing jaw 1 according to the exemplary embodiment of the present invention. For the second cutting edge 7 of the second jaw 6, the description is similar, since the shape of the second cutting edge 7 is adapted to the shape of the first cutting edge 5.
Die erste Schneidkante 5 der ersten Zangenbacke 2 besteht aus zwei Schenkeln 9, 10, die im Wesentlichen spiegelsymmetrisch zu einer Mittelachse 11 verlaufen, die senkrecht zur Gelenkachse 8 steht. Die Schenkel 9, 10 bilden des Weiteren einen distalen Endabschnitt 12 der ersten Schneidkante 5, wobei der distale Endabschnitt 12 im gegenwärtigen Ausführungsbeispiel eine punktuelle Spitze 12 der ersten Schneidkante 5 ist. Alternativ kann der distale Endabschnitt 12 eine Kurve der ersten Schneidkante 5 sein, die geradlinig oder gekrümmt sein kann. Die MittelachseThe first cutting edge 5 of the first jaw 2 consists of two legs 9, 10 which extend substantially mirror-symmetrically to a central axis 11, which is perpendicular to the hinge axis 8. The legs 9, 10 further form a distal end portion 12 of the first cutting edge 5, wherein the distal end portion 12 in the present embodiment is a punctiform tip 12 of the first cutting edge 5. Alternatively, you can the distal end portion 12 may be a curve of the first cutting edge 5, which may be rectilinear or curved. The central axis
11 schneidet die Gelenkachse 8 und den distalen Endabschnitt11 intersects the hinge axis 8 and the distal end portion
12. 12th
Im Folgenden wird der Verlauf der ersten Schneidkante 5 gemäß der vorliegenden Erfindung beschrieben. In the following, the course of the first cutting edge 5 according to the present invention will be described.
Gemäß der Fig. 6 haben die Schenkel 9, 10 der ersten Schneid- kante 5 in einer Draufsicht senkrecht zur Gelenkachse 8 und senkrecht zur Mittelachse 11 jeweils ein Schneidkantensegment mit nicht-konstantem Krümmungsradius. Der Verlauf des Schneidkantensegments in der Draufsicht wird durch bestimmte geometrische Figuren folgendermaßen definiert. According to FIG. 6, the legs 9, 10 of the first cutting edge 5 in a plan view perpendicular to the hinge axis 8 and perpendicular to the central axis 11 each have a cutting edge segment with a non-constant radius of curvature. The course of the cutting edge segment in plan view is defined by certain geometric figures as follows.
Zunächst wird eine virtuelle Viertelellipse durch eine große Halbachse a, die parallel zur Gelenkachse 8 der Betonbrechzange 1 verläuft, und eine kleine Halbachse b definiert, die am distalen Endabschnitt 12 der ersten Schneidkante 5 endet. Die kleine Halbachse b verläuft also zwischen einem Mittelpunkt M der virtuellen Viertelellipse und dem distalen Endabschnitt 12 der ersten Schneidkante 5. First, a virtual quarter ellipse is defined by a large semiaxis a, which runs parallel to the articulation axis 8 of the concrete crushing tongs 1, and a small semiaxis b, which ends at the distal end portion 12 of the first cutting edge 5. The small semiaxis b thus extends between a center M of the virtual quarter ellipse and the distal end portion 12 of the first cutting edge 5.
Daneben werden ein virtueller, halber Klöpperbogen nach DIN 28011 und ein virtueller, halber Korbbogen nach DIN 28013 jeweils mit einem Radius ra, einer Kallote rl, einer Krempe r2 und einem Bord h definiert, wobei der Radius ra identisch zu der großen Halbachse a der virtuellen Viertelellipse ist und wobei Enden oder Spitzen (entsprechend den Hochpunkten des gan- zen Klöpperbogen oder des ganzen Korbbogens) des virtuellen, halben Klöpperbogens und des virtuellen, halben Korbbogens jeweils auf dem Schnittpunkt der Viertelellipse mit dem distalen Endabschnitt 12 liegen und der Bord h an der großen Halbachse a endet . In addition, a virtual, half dished bow according to DIN 28011 and a virtual, half basket bow according to DIN 28013 are each defined with a radius ra, a Kallote rl, a brim r2 and a board h, wherein the radius ra identical to the large semi-axis a of the virtual Quarter ellipse is and where ends or tips (corresponding to the high points of the whole dipper bow or the whole basket bow) of the virtual, half dovetail and the virtual, half basket arch respectively at the intersection of the quarter ellipse with the distal End portion 12 lie and the board h ends at the large semi-axis a.
Die Begriffe Klopperbogen und Korbbogen sind in entsprechenden DIN-Normen allgemein definiert und werden in der Fig. 7 beschrieben (abgeleitet aus Borowski, "Gewölbter Boden", The terms paddle bow and basket bow are generally defined in corresponding DIN standards and are described in FIG. 7 (derived from Borowski, "vaulted ground",
http://de.wikipedia.org). http://de.wikipedia.org).
Beim Klopperbogen nach DIN 28011 ist rl = Da und r2 = 0,1 * Da, wobei Da = 2 * ra gilt. Beim Korbbogen nach DIN 28013 ist rl = 0,8 * Da und r2 = 0,154 * Da, wobei Da = 2 * ra gilt. Die verwendeten Begriffe "halber Klopperbogen" und "halber Korbbogen" meinen jeweils einen Bogen in einem Winkel von 90°, da ein ganzer Klopperbogen und ein ganzer Korbbogen üblicherweise in einem Winkel von 180° aufgespannt sind (siehe Fig. 7) . In the knocking arc according to DIN 28011, rl = Da and r2 = 0.1 * Da, where Da = 2 * ra. For the basket bow according to DIN 28013, rl = 0.8 * Da and r2 = 0.154 * Da, where Da = 2 * ra. The terms "half pad bow" and "half basket bow" used in each case an arc at an angle of 90 °, since a whole beater bow and a whole basket bow are usually spanned at an angle of 180 ° (see Fig. 7).
Gemäß der vorliegenden Erfindung verläuft das Schneidkantensegment zwischen der virtuellen Viertelellipse und dem virtuellen, halben Klopperbogen, und/oder es verläuft zwischen der virtuellen Viertelellipse und dem virtuellen, halben Korbbogen an der Seite der Gelenkachse 8 (d.h. angrenzend an der Gelenkachse 8) und außerhalb der Viertelellipse und des virtuellen, halben Korbbogens an der Seite des distalen Endabschnitts 12 der According to the present invention, the cutting edge segment extends between the virtual quarter ellipse and the virtual half half beater arc, and / or extends between the virtual quarter ellipse and the virtual, half basket bow on the side of the hinge axis 8 (ie adjacent to the hinge axis 8) and outside Quarter ellipse and the virtual, half basket bow on the side of the distal end portion 12 of
Schneidkante 5 (d.h. angrenzend an dem distalen Endabschnitt 12 der Schneidkante 5) , wie es in der Fig. 6 beispielhaft dargestellt ist. Cutting edge 5 (i.e., adjacent to the distal end portion 12 of the cutting edge 5), as exemplified in FIG.
Im dargestellten Ausführungsbeispiel liegt die Schneidkante 5 auf einem Verlauf, der annähernd durch rl = k *Da und r2 = 0,33 * k * Da definiert ist, wobei Da = 2 * ra gilt und k eine Konstante zwischen 1 und 0.8 ist. Der Radius der Schneidkante 5 im Bereich der Kailote rl ist im dargestellten Ausführungsbeispiel ungefähr dreimal so groß wie der Radius der Schneidkante 5 im Bereich der Krempe r2. In the exemplary embodiment illustrated, the cutting edge 5 lies on a course which is approximately defined by rl = k * Da and r2 = 0.33 * k * Da, where Da = 2 * ra and k is a constant between 1 and 0.8. The radius of the cutting edge 5 in the region of the Kailote rl is in the illustrated embodiment approximately three times as large as the radius of the cutting edge 5 in the region of the rim r2.
Vorzugsweise hat der Bord h eine Größe, die kleiner ist als zwei Drittel der kleinen Halbachse b. Weiter bevorzugt hat der Bord h eine Größe, die kleiner ist als die Hälfte der kleinen Halbachse b. Weiter bevorzugt hat der Bord h eine Größe, die kleiner ist als ein Drittel der kleinen Halbachse b. Es ist auch denkbar, dass das der Bord h eine Größe von Null hat. Preferably, the board h has a size which is smaller than two-thirds of the small semi-axis b. More preferably, the board h has a size that is smaller than half of the small semi-axis b. More preferably, the board h has a size which is smaller than one third of the small semi-axis b. It is also conceivable that the board h has a size of zero.
Vorzugsweise liegt das Verhältnis zwischen der großen Halbachse a und der kleinen Halbachse b in einem Bereich von 4:1 bis 3:1, weiter bevorzugt in einem Bereich von 3:1 bis 2:1, und weiter bevorzugt in einem Bereich von 2:1 bis 1,5:1. Preferably, the ratio between the major half axis a and the minor half axis b is in a range of 4: 1 to 3: 1, more preferably in a range of 3: 1 to 2: 1, and more preferably in a range of 2: 1 to 1.5: 1.
Gemäß den Figuren 3 und 4 ist die Brechzange in einer Seitenansicht (in der yz-Ebene) gezeigt. In dieser Ebene hat die erste Schneidkante 5 im Bereich des distalen Endabschnitts 12 einen Geradenabschnitt 14, an dem sich zur Seite der Gelenkachse 8 hin ein angewinkelter oder gekrümmter Abschnitt 15 anschließt, der zur Seite der anderen Schneidkante 7 hin angewinkelt oder gekrümmt ist. Die zweite Schneidkante 7 hat vorzugsweise ebenfalls eine entsprechende Konfiguration. Referring to Figures 3 and 4, the crusher is shown in a side view (in the yz plane). In this plane, the first cutting edge 5 in the region of the distal end portion 12 has a straight line section 14, to which an angled or curved portion 15 adjoins the side of the hinge axis 8, which is angled or curved to the side of the other cutting edge 7. The second cutting edge 7 preferably also has a corresponding configuration.
Gemäß den Figuren 1 bis 5 sind vorzugsweise an der ersten und der zweiten Zangenbacke 2, 6 Brechzähne 13 zum Eindringen in Beton angeordnet. Die Brechzähne 13 befinden sich bei Betrachtung von der Gelenkachse 8 hinter der ersten Schneidkante 5 und vor der zweiten Schneidkante 7. Die Brechzähne 13 durchdringen den Beton und spalten ihn. Die Brechzähne 13 halten die According to FIGS. 1 to 5, crushing teeth 13 are preferably arranged on the first and second forceps jaws 2, 6 for penetration into concrete. The crushing teeth 13 are located when viewed from the hinge axis 8 behind the first cutting edge 5 and before the second cutting edge 7. The crushing teeth 13 penetrate the concrete and split it. The crushing teeth 13 hold the
Schneidkanten 5, 7 außerdem davon ab, mit ungebrochenem Beton in Kontakt zu treten. Nachdem der Beton durch die Brechzähne 13 zerbröselt wurde, können die Schneidkanten 5, 7 die aus und vom Beton befreiten Armierungen zerschneiden. Cutting edges 5, 7 also prevents it from coming into contact with unbroken concrete. After the concrete through the crushing teeth 13 crumbled, the cutting edges 5, 7 can cut out of and removed from the concrete reinforcements.
Vorzugsweise sind die erste und die zweite Schneidkante 5, 7 auf die entsprechende Zangenbacke 2, 6 aufgeschweißt. Preferably, the first and the second cutting edge 5, 7 welded to the corresponding forceps jaw 2, 6.
Der Schutzumfang ist nicht auf das hier dargestellte Ausführungsbeispiel beschränkt, sondern umfasst alle möglichen Betonbrechzangen, sofern diese unter den Schutzumfang der Ansprüche fallen. The scope of protection is not limited to the embodiment shown here, but includes all possible concrete crushing tongs, provided that they fall within the scope of the claims.

Claims

ANSPRÜCHE
1. Betonbrechzange (1) mit: 1. Concrete crushing tongs (1) with:
einer ersten Zangenbacke (2) , die einen rahmenartigen ers- ten Grundkörper (3) aufweist, der einen Innenraum (4) der ersten Zangenbacke (1) definiert und eine erste Schneidkante (5) aufweist, und  a first forceps jaw (2) which has a frame-like first base body (3) which defines an inner space (4) of the first forceps jaw (1) and has a first cutting edge (5), and
einer zweiten Zangenbacke (6) , die eine zweite Schneidkante (7) aufweist und mit der ersten Zangenbacke (2) um eine Ge- lenkachse (8) schwenkbar verbunden ist, um in den Innenraum (4) einzutauchen,  a second jaw (6) which has a second cutting edge (7) and is pivotally connected to the first jaw (2) about a hinge axis (8) in order to dip into the inner space (4),
wobei zumindest eine der ersten und der zweiten Schneidkante (5, 7) aus zwei Schenkeln (9, 10) besteht, die im Wesentlichen spiegelsymmetrisch zu einer Mittelachse (11) verlaufen, die senkrecht zur Gelenkachse (8) steht, wobei  wherein at least one of the first and second cutting edges (5, 7) consists of two legs (9, 10) which are substantially mirror-symmetrical to a central axis (11) perpendicular to the hinge axis (8)
die Schenkel (9, 10) einen distalen Endabschnitt (12) der Schneidkante (5, 7) bilden, wobei der distale Endabschnitt (12) entweder eine punktuelle Spitze (12) der Schneidkante (5, 7) oder eine Kurve der Schneidkante (5, -7) ist, und wobei die Mit- telachse (11) die Gelenkachse (8) und den distalen Endabschnitt (12) schneidet,  the legs (9, 10) form a distal end portion (12) of the cutting edge (5, 7), the distal end portion (12) having either a punctiform tip (12) of the cutting edge (5, 7) or a curve of the cutting edge (5 , -7), and wherein the central axis (11) intersects the hinge axis (8) and the distal end section (12),
dadurch gekennzeichnet, dass characterized in that
die Schenkel (9, 10) in einer Draufsicht (xy) senkrecht zur Gelenkachse (8) und senkrecht zur Mittelachse (11) jeweils ein Schneidkantensegment mit nicht -konstantem Krümmungsradius aufweisen,  the legs (9, 10) in a plan view (xy) perpendicular to the hinge axis (8) and perpendicular to the central axis (11) each have a cutting edge segment with non-constant radius of curvature,
der Verlauf des Schneidkantensegments in der Draufsicht folgendermaßen definiert ist:  the course of the cutting edge segment in plan view is defined as follows:
eine virtuelle Viertelellipse ist durch eine große Halb- achse (a) , die parallel zur Gelenkachse (8) der Betonbrechzange (1) verläuft, und eine kleine Halbachse (b) definiert, welche am distalen Endabschnitt (12)- der Schneidkante (5, 7) endet, ein virtueller, halber Klöpperbogen und ein virtueller, halber Korbbogen sind jeweils mit einem Radius (ra) , einer Kailote (rl) , einer Krempe (r2) und einem Bord (h) definiert, wobei der Radius (ra) identisch zu der großen Halbachse (a) der Viertelellipse ist und wobei Spitzen des virtuellen, halben Klöpperbogens und des virtuellen, halben Korbbogens jeweils auf einem Schnittpunkt der virtuellen Viertelellipse mit dem distalen Endabschnitt (12) liegen und der Bord (h) an der großen Halbachse (a) endet, und A virtual quarter-ellipse is defined by a large half-axis (a) parallel to the articulated axis (8) of the concrete-crushing tongs (1) and a small half-axis (b) located at the distal end portion (12) - the cutting edge (5). 7) ends, a virtual half dome bow and a virtual half dome bow are each defined with a radius (ra), a kailote (rl), a brim (r2) and a board (h), where the radius (ra) is identical to the large half axis (a) is the quarter-ellipse and wherein tips of the virtual, half-dome bow and the virtual, half-basket bow lie respectively at an intersection of the virtual quarter ellipse with the distal end portion (12) and the board (h) ends at the major half-axis (a), and
das Schneidkantensegment  the cutting edge segment
zwischen der virtuellen Viertelellipse und dem virtuellen, halben Klöpperbogen verläuft, und/oder  runs between the virtual quarter ellipse and the virtual, half dipper bow, and / or
zwischen der virtuellen Viertelellipse und dem virtuellen, halben Korbbogen an der Seite der Gelenkachse (8) und außerhalb der virtuellen Viertelellipse und des virtuellen, halben Korbbogens a der Seite des distalen Endabschnitts (12) der Schneidkante (5, 7) verläuft.  between the virtual quarter ellipse and the virtual, half basket arc on the side of the hinge axis (8) and outside the virtual quarter ellipse and the virtual, half basket arch a the side of the distal end portion (12) of the cutting edge (5, 7).
2. Betonbrechzange (1) gemäß Anspruch 1, 2. Betonbrechzange (1) according to claim 1,
wobei der Bord (h) eine Größe von Null hat.  wherein the board (h) has a size of zero.
3. Betonbrechzange (1) gemäß Anspruch 1, 3. Concrete crushing tongs (1) according to claim 1,
wobei der Bord (h) eine Größe hat, die kleiner ist als ein Drittel der kleinen Halbachse (b) .  wherein the board (h) has a size which is smaller than one third of the semi-minor axis (b).
4. Betonbrechzange (1) gemäß Anspruch 1, 4. Concrete crushing tongs (1) according to claim 1,
.·. wobei der Bord (h) eine Größe hat, die kleiner ist als die Hälfte der kleinen Halbachse (b) . , ·. wherein the board (h) has a size smaller than half of the semi-minor axis (b).
5. Betonbrechzange (1) gemäß Anspruch 1, 5. Betonbrechzange (1) according to claim 1,
wobei der Bord (h) eine Größe hat, die kleiner ist als zwei Drittel der kleinen Halbachse (b) . wherein the board (h) has a size which is smaller than two-thirds of the semi-minor axis (b).
6. Betonbrechzange (1) gemäß einem der vorherigen Ansprüche, wobei das Verhältnis zwischen der großen Halbachse (a) und der kleinen Halbachse (b) in einem Bereich von 4:1 bis 3:1 liegt . A concrete pincers (1) according to any one of the preceding claims, wherein the ratio between the major half axis (a) and the minor half axis (b) is in a range of 4: 1 to 3: 1.
7. Betonbrechzange (1) gemäß einem der vorherigen Ansprüche, wobei das Verhältnis zwischen der großen Halbachse (a) und der kleinen Halbachse (b) in einem Bereich von 3 : 1 bis 2 : 1 liegt . 7. Concrete crushing tongs (1) according to one of the preceding claims, wherein the ratio between the major half-axis (a) and the semi-minor axis (b) in a range of 3: 1 to 2: 1.
8. Betonbrechzange (1) gemäß einem der vorherigen Ansprüche, wobei das Verhältnis zwischen der großen Halbachse (a) und der kleinen Halbachse (b) in einem Bereich von 2:1 bis 1,5:1 liegt. 8. The concrete breaking tongs (1) according to one of the preceding claims, wherein the ratio between the major half axis (a) and the small half axis (b) is in a range of 2: 1 to 1.5: 1.
9. Betonbrechzange (1) gemäß einem der vorherigen Ansprüche, wobei zumindest die erste oder die zweite Schneidkante (5, 7) in einer Ebene (yz) , die senkrecht zur Gelenkachse (8) und parallel zur Mittelachse (11) aufgespannt ist, im Bereich des distalen Endabschnitts (12) einen Geradenabschnitt (14) aufweist, an dem sich zur Seite der Gelenkachse (8) hin ein angewinkelter oder gekrümmter Abschnitt (15) anschließt, der zur Seite der anderen Schneidkante (5, 7) hin angewinkelt oder gekrümmt ist . 9. concrete breaking pliers (1) according to one of the preceding claims, wherein at least the first or the second cutting edge (5, 7) in a plane (yz) which is perpendicular to the hinge axis (8) and parallel to the central axis (11) is clamped in the Area of the distal end portion (12) has a straight line portion (14), to which an angled or curved portion (15) adjoins the side of the hinge axis (8), the angled or curved to the side of the other cutting edge (5, 7) is.
10. Betonbrechzange (1) gemäß einem der vorherigen Ansprüche, wobei zumindest an einer von der ersten und der zweiten Zangenbacke (2, 6) Brechzähne (13) zum Eindringen in Beton angeordnet sind, wobei sich die Brechzähne (13) bei Betrachtung von der Gelenkachse (8) hinter der ersten Schneidkante (5) und vor der zweiten Schneidkante (7) befinden. 10. Concrete crushing tongs (1) according to one of the preceding claims, wherein on at least one of the first and the second jaw (2, 6) crushing teeth (13) are arranged for penetration into concrete, wherein the crushing teeth (13) when viewed from the Joint axis (8) behind the first cutting edge (5) and before the second cutting edge (7) are located.
11. Betonbrechzange (1) nach einem der vorherigen Ansprüche, wobei zumindest eine der ersten und der zweiten Schneidkante (5, 7) auf die entsprechende Zangenbacke (2, 6) aufgeschweißt ist. 11. Concrete crushing tongs (1) according to one of the preceding claims, wherein at least one of the first and the second cutting edge (5, 7) on the corresponding jaw (2, 6) is welded.
EP15706417.1A 2014-02-18 2015-02-18 Concrete jaw crusher Active EP3108070B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014202972.4A DE102014202972A1 (en) 2014-02-18 2014-02-18 Concrete-crushing pincers
PCT/EP2015/053410 WO2015124623A1 (en) 2014-02-18 2015-02-18 Concrete jaw crusher

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EP3108070A1 true EP3108070A1 (en) 2016-12-28
EP3108070B1 EP3108070B1 (en) 2018-04-11

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WO (1) WO2015124623A1 (en)

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CN108704748A (en) * 2018-05-25 2018-10-26 河北卓秋实业有限公司 A kind of automatical and efficient broken armored concrete cutting material block device
DE102018220265A1 (en) * 2018-11-26 2020-05-28 Thyssenkrupp Ag End floor

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JPS57117153U (en) * 1981-01-13 1982-07-20
DE4424740A1 (en) 1994-07-13 1996-01-18 Schilling Ostermeyer Maschinen Concrete crushing pliers
US6839969B2 (en) * 2002-11-18 2005-01-11 Genesis Equipment And Manufacturing, Inc. Replaceable demolition shear piercing tip
AT9148U1 (en) * 2006-03-23 2007-05-15 Wimmer Alois Ing CANCEL TONG
EP2581506A1 (en) * 2011-10-14 2013-04-17 Caterpillar Work Tools B. V. Wear pack for a demolition tool

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