EP3625392B1 - Wear protection assembly for the clearing blade of a snowplow - Google Patents

Wear protection assembly for the clearing blade of a snowplow Download PDF

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Publication number
EP3625392B1
EP3625392B1 EP19749211.9A EP19749211A EP3625392B1 EP 3625392 B1 EP3625392 B1 EP 3625392B1 EP 19749211 A EP19749211 A EP 19749211A EP 3625392 B1 EP3625392 B1 EP 3625392B1
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EP
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Prior art keywords
clearing
wear
reinforcing elements
protection assembly
blade
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EP19749211.9A
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German (de)
French (fr)
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EP3625392A1 (en
Inventor
Roland KÜPER
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Kueper GmbH and Co KG
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Kueper GmbH and Co KG
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Publication of EP3625392A1 publication Critical patent/EP3625392A1/en
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H5/00—Removing snow or ice from roads or like surfaces; Grading or roughening snow or ice
    • E01H5/04—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material
    • E01H5/06—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material dislodging essentially by non-driven elements, e.g. scraper blades, snow-plough blades, scoop blades
    • E01H5/061—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material dislodging essentially by non-driven elements, e.g. scraper blades, snow-plough blades, scoop blades by scraper blades
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H5/00—Removing snow or ice from roads or like surfaces; Grading or roughening snow or ice
    • E01H5/04—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material
    • E01H5/06—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material dislodging essentially by non-driven elements, e.g. scraper blades, snow-plough blades, scoop blades
    • E01H5/065—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material dislodging essentially by non-driven elements, e.g. scraper blades, snow-plough blades, scoop blades characterised by the form of the snow-plough blade, e.g. flexible, or by snow-plough blade accessories
    • E01H5/066—Snow-plough blade accessories, e.g. deflector plates, skid shoes

Definitions

  • the invention relates to a wear protection arrangement for the clearing blade of a snow plow, which has several clearing strips arranged next to one another, fastened with a fastening neck on the lower edge of the clearing blade, on the front side of which plate-shaped reinforcing elements are arranged in areas at risk of wear, each of which extends from the wear edge of the clearing strip to above its fastening neck range, the parts of this wear protection arrangement are connected to each other and to the lower edge of the clearing blade by a screw connection, which on the one hand has an upper screw bolt connection with at least one screw bolt, which through aligned bores in the lower edge of the clearing blade, in the fastening neck of the clearing strip and in the reinforcing element is guided, and on the other hand has a lower screw bolt connection with at least one screw bolt, which is below the lower edge of the clearing blade by each other f luminous bores is guided in the reinforcing element and in the clearing bar, the bore being arranged in the clearing bar between its wear area and its fastening neck.
  • Some such wear protection arrangement is for example from DE 10 2015 117 001 A1 known.
  • the reinforcement elements disclosed there are each designed as a sandwich, consisting of a wear rubber layer vukanized between a base plate and a cover plate, in which hard material wear elements can optionally be embedded.
  • the object of the invention is to further develop the wear protection arrangement of the type mentioned at the outset such that the plate-shaped reinforcing elements used therein are suitable for inexpensive mass production and can be used on different types of snowploughs without reworking.
  • the invention proposes that the reinforcing elements are each made as one-piece cast pieces made of chilled cast iron and that the holes provided for the upper screw bolt connection in the reinforcing elements are designed as elongated holes that are vertical to the lower edge of the blade are widened.
  • the height of the reinforcement elements above the road surface in the fully assembled state is based exclusively on the lower screw bolt connection, ie on the ones present in the clearing strips Bores and thus on the blade itself.
  • the fixing of the reinforcing elements can be adapted to the different heights of the holes in the lower edge of the blade, depending on the blade type.
  • the orientation of the reinforcing elements exclusively on the scraper bar made possible for the first time by the invention, makes it possible for the first time to precisely coordinate the heights of the wear edges of clearing bars and reinforcing elements from the outset, regardless of the peculiarities of the clearing blade.
  • the wear endangering the lower screw bolt connection is dependent on the angle of incidence of the scraper blade in relation to the road surface. In the case of a small angle of attack, at which the surface of the clearing strip runs essentially perpendicular to the road surface, this wear occurs significantly later than in the case of a larger angle of attack. In principle, this wear is of course also dependent on the height of the lower screw bolt connection above the road surface, which is uncertain in the wear protection arrangements of the type mentioned according to the prior art, depending on the type of blade.
  • the heights of the clearing strips on the one hand and the reinforcing elements on the other hand are constant, it is possible, according to an advantageous further development of the invention, to provide the front sides of the reinforcing elements with departure markings, which depend on the permissible wear range depending on the angle of the clearing strips show the angle of attack. This can reliably prevent accidents from occurring due to incorrect operation.
  • the production of the reinforcement elements as cast pieces made of chilled cast iron finally makes it possible to design the reinforcement element surfaces that come into contact with the snow during clearing work in a simple manner so that the snow flowing off to the side at high speed does not splash up and thus the field of vision of the Driver of the snow plow impaired.
  • a particularly advantageous embodiment of the wear protection arrangement according to the invention proposes that the reinforcement elements in the wear area have a thickened central section and laterally sloping flanks in the direction of the front side of the clearing strip.
  • the thickened middle section ensures a large wear surface on the lower edge of the reinforcement elements.
  • the inclined flanks ensure that the snow, which quickly slides to the side during clearing work, does not splash up, but can flow off to the side largely unhindered.
  • the clearing blade of a snow plow is denoted by the reference number 1 in the drawing.
  • several clearing strips 2 are attached next to one another (cf. Figures 1 and 4th ).
  • These clearing strips 2 each consist in their wear area of a base plate 3 and a cover plate 4, between which a wear rubber layer 5 is vulcanized.
  • hard material bodies 6, which can consist of fused corundum, for example.
  • the cover plate 4 is angled in the upper edge area of the clearing bar 2 in the direction of the base plate 3 in such a way that it rests on the base plate 3 and in this area together with the base plate 3 forms a fastening neck 7 with which the clearing bar 2 is attached to the lower edge of the clearing blade 1 is secured with screws 8.
  • plate-shaped reinforcing elements 9 are mounted in areas particularly exposed to wear, each of which is designed as one-piece cast pieces made of chilled cast iron.
  • an upper screw bolt connection is initially provided, which has at least one screw bolt 10, which is guided through aligned bores in the lower edge of the clearing blade 1, in the fastening neck 7 of the clearing bar 2 and in the reinforcing element 9 is.
  • a lower screw bolt connection with at least one screw bolt 11 is provided to fix the reinforcing elements 9 in the wear protection arrangement, which is guided below the lower edge of the clearing blade 1 through mutually aligned bores in the reinforcing element 9 and in the clearing bar 2, the bore in the clearing bar 2 between whose wear area and whose fastening neck 7 is arranged.
  • the boreholes of the upper screw bolt connection in the reinforcing elements 9 are designed as elongated holes which are widened vertically to the lower edge of the clearing strip 2.
  • the height of the reinforcement elements 9 in the fully assembled wear arrangement is automatically adapted to the respective height of the clearing strip, even if the height of the drill holes in the lower edge of the clearing blade is different due to the type.
  • the use of elongated holes instead of circular bores is irrelevant for the durability of the screw connections insofar as the screws are always tensioned so intensively that all static and dynamic loads occurring during operation are ensured solely by the surface pressure of the flat parts, so that it does not depend on the shear forces to be absorbed by the screw bolts.
  • the reinforcing element 9 has a thickened central portion 9a in order to provide the largest possible and load-bearing wear surface, and laterally sloping flanks 9b in the direction of the front side of the clearing strip 2. These gently sloping flanks 9b ensure better lateral discharge of the snow along the clearing strip during clearing work, which avoids the risk of snow spraying up during the clearing work and robbing the driver of the snow plow from sight.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cleaning Of Streets, Tracks, Or Beaches (AREA)

Description

Die Erfindung betrifft eine Verschleißschutzanordnung für den Räumschild eines Schneepfluges, die mehrere nebeneinander angeordnete, mit einem Befestigungshals am unteren Rand des Räumschildes befestigte Räumleisten aufweist, auf deren Vorderseite in verschleißgefährdeten Teilbereichen plattenförmige Verstärkungselemente angeordnet sind, die jeweils von der Verschleißkante der Räumleiste bis über deren Befestigungshals reichen, wobei die Teile dieser Verschleißschutzanordnung miteinander und mit dem unteren Rand des Räumschildes durch einen Schraubverbund verbunden sind, welcher einerseits eine obere Schraubenbolzenverbindung mit mindestens einem Schraubenbolzen aufweist, der durch miteinander fluchtende Bohrungen im unteren Rand des Räumschildes, im Befestigungshals der Räumleiste und im Verstärkungselement geführt ist, und andererseits eine untere Schraubenbolzenverbindung mit mindestens einem Schraubenbolzen aufweist, der unterhalb der Unterkante des Räumschildes durch miteinander fluchtende Bohrungen in dem Verstärkungselement und in der Räumleiste geführt ist, wobei die Bohrung in der Räumleiste zwischen deren Verschleißbereich und deren Befestigungshals angeordnet ist.The invention relates to a wear protection arrangement for the clearing blade of a snow plow, which has several clearing strips arranged next to one another, fastened with a fastening neck on the lower edge of the clearing blade, on the front side of which plate-shaped reinforcing elements are arranged in areas at risk of wear, each of which extends from the wear edge of the clearing strip to above its fastening neck range, the parts of this wear protection arrangement are connected to each other and to the lower edge of the clearing blade by a screw connection, which on the one hand has an upper screw bolt connection with at least one screw bolt, which through aligned bores in the lower edge of the clearing blade, in the fastening neck of the clearing strip and in the reinforcing element is guided, and on the other hand has a lower screw bolt connection with at least one screw bolt, which is below the lower edge of the clearing blade by each other f luminous bores is guided in the reinforcing element and in the clearing bar, the bore being arranged in the clearing bar between its wear area and its fastening neck.

Einige derartige Verschleißschutzanordnung ist beispielsweise aus der DE 10 2015 117 001 A1 bekannt. Die dort offenbarten Verstärkungselemente sind jeweils als Sandwich ausgebildet, bestehend aus einer zwischen einer Grundplatte und einer Deckplatte einvukanisierten Verschleißgummischicht, in die gegebenenfalls noch Hartstoff-Verschleißelemente eingebettet sein können.Some such wear protection arrangement is for example from DE 10 2015 117 001 A1 known. The reinforcement elements disclosed there are each designed as a sandwich, consisting of a wear rubber layer vukanized between a base plate and a cover plate, in which hard material wear elements can optionally be embedded.

Diese Sandwich-Verschleißelemente haben sich in der Praxis zwar gut bewährt, sind aber wegen ihres komplizierten Aufbaus in der Herstellung extrem teuer.Although these sandwich wear elements have proven themselves in practice, they are extremely expensive to manufacture because of their complicated structure.

Ein besonderes Problem bei der Anbringung von plattenförmigen Verstärkungselementen an der Vorderseite von Räumleisten ergibt sich aus der Typenvielfalt der zum Einsatz kommenden Schneepflüge, insbesondere durch die unterschiedlich ausgestalteten Schraubverbindungen zwischen der Unterkante von deren Räumschild und dem Befestigungshals der Räumleisten. Wegen der bei der Räumarbeit auftretenden, extrem starken dynamischen Belastungen ist es unumgänglich notwendig, die auf den Räumleisten aufliegenden Verstärkungselemente sowohl mit dem Räumschild als auch mit der Räumleiste ausreichend fest zu verbinden. Aus diesem Grund werden bei den bekannten Verschleißschutzanordnungen der eingangs genannten Art die Abstände zwischen den Bohrungen der oberen Schraubenbolzenverbindung einerseits und den Bohrungen der unteren Schraubenbolzenverbindung andererseits passgenau aufeinander abgestimmt, was bedeutet, dass für jeden abweichenden Schneepflugtyp besonders angepasste Verstärkungselemente bereitgehalten werden müssen.A particular problem when attaching plate-shaped reinforcing elements to the front of clearing strips results from the variety of types that are used Snow plows, in particular due to the differently designed screw connections between the lower edge of the clearing blade and the fastening neck of the clearing strips. Because of the extremely strong dynamic loads that occur during clearing work, it is essential to connect the reinforcing elements resting on the clearing strips with both the clearing blade and the clearing strip with sufficient strength. For this reason, in the known wear protection arrangements of the type mentioned, the distances between the bores of the upper screw bolt connection on the one hand and the bores of the lower screw bolt connection on the other hand are precisely matched to one another, which means that specially adapted reinforcing elements must be kept ready for each different type of snow plow.

Diese Anpassung an die verschiedenen Abmessungen mag bei den bekannten Sandwich-Verschleißelementen noch hinnehmbar sein, weil in Anbetracht der hohen Fertigungskosten bei der Fertigung ohnehin mit verhältnismäßig kleinen Losgrößen gearbeitet wird. Bei der Massenherstellung von Verschleißelementen aus Hartguss, die im Prinzip ebenfalls aus dem Stand der Technik bekannt sind, ist diese Notwendigkeit der individuellen Anpassung ein großes Problem, welches bisher nur dadurch gelöst werden kann, dass die Verschleißschutzelemente ohne die Bohrungen gefertigt werden und die Bohrungen nachträglich individuell eingebracht werden. Auch hierdurch erhöhen sich die Kosten für die Fertigung, die Lagerhaltung und die Distribution erheblich.This adaptation to the different dimensions may still be acceptable in the case of the known sandwich wear elements because, in view of the high production costs, relatively small batch sizes are used in production anyway. In the mass production of wear elements made of chilled cast iron, which in principle are also known from the prior art, this need for individual adaptation is a major problem, which so far can only be solved by manufacturing the wear protection elements without the bores and the bores afterwards be introduced individually. This also increases the costs for production, storage and distribution considerably.

Es ist Aufgabe der Erfindung, die Verschleißschutzanordnung der eingangs genannten Art dahingehend weiterzubilden, dass die darin verwendeten plattenförmigen Verstärkungselemente für eine kostengünstige Massenfertigung geeignet sind und ohne Nachbearbeitung an unterschiedlichen Schneepflugtypen zum Einsatz gebracht werden können.The object of the invention is to further develop the wear protection arrangement of the type mentioned at the outset such that the plate-shaped reinforcing elements used therein are suitable for inexpensive mass production and can be used on different types of snowploughs without reworking.

Zur Lösung dieser Aufgabe schlägt die Erfindung ausgehend von einer Verschleißschutzanordnung der eingangs genannten Art vor, dass die Verstärkungselemente jeweils als einteilige Gussstücke aus Hartguss hergestellt sind und dass die für die obere Schraubbolzenverbindung vorgesehenen Bohrungen in den Verstärkungselementen als Langlöcher ausgebildet sind, die vertikal zum unteren Rand des Räumschildes aufgeweitet sind.To solve this problem, based on a wear protection arrangement of the type mentioned, the invention proposes that the reinforcing elements are each made as one-piece cast pieces made of chilled cast iron and that the holes provided for the upper screw bolt connection in the reinforcing elements are designed as elongated holes that are vertical to the lower edge of the blade are widened.

Bei der Verschleißschutzanordnung gemäß der Erfindung orientiert sich die Höhenlage der Verstärkungselemente oberhalb der Straßenoberfläche im fertig montierten Zustand ausschließlich an der unteren Schraubenbolzenverbindung, d.h. an den in den Räumleisten vorhandenen Bohrungen und damit an der Räumleiste selbst. Im Bereich der oberen Schraubenbolzenverbindung ist die Festlegung der Verstärkungselemente demgegenüber an die je nach Räumschildtyp unterschiedlichen Höhenlagen der in der Unterkante des Räumschildes vorhandenen Bohrungen anpassbar. Die durch die Erfindung erstmals ermöglichte Orientierung der Verstärkungselemente ausschließlich an der Räumleiste macht es erstmals möglich, die Höhenlagen der Verschleißkanten von Räumleisten und Verstärkungselementen unabhängig von den Besonderheiten des Räumschildes von vornherein exakt aufeinander abzustimmen.In the wear protection arrangement according to the invention, the height of the reinforcement elements above the road surface in the fully assembled state is based exclusively on the lower screw bolt connection, ie on the ones present in the clearing strips Bores and thus on the blade itself. In the area of the upper screw bolt connection, the fixing of the reinforcing elements can be adapted to the different heights of the holes in the lower edge of the blade, depending on the blade type. The orientation of the reinforcing elements exclusively on the scraper bar, made possible for the first time by the invention, makes it possible for the first time to precisely coordinate the heights of the wear edges of clearing bars and reinforcing elements from the outset, regardless of the peculiarities of the clearing blade.

Ein weiteres Problem bei der Verwendung von Verschleißschutzanordnungen mit zusätzlichen Verstärkungselementen der eingangs genannten Art besteht darin, dass die Gefahr besteht, dass bei fortschreitendem Verschleiß gegen Ende der Standzeit die untere Schraubenbolzenverbindung durch Verschleiß zerstört wird, so dass die Verstärkungselemente zur Unzeit abgerissen werden können und bei der Schneeräumung den nachfolgenden Straßenverkehr extrem gefährden.Another problem with the use of wear protection arrangements with additional reinforcing elements of the type mentioned above is that there is a risk that, as wear progresses towards the end of the service life, the lower screw bolt connection will be destroyed by wear, so that the reinforcing elements can be torn off at an inopportune time extremely endanger the following road traffic when clearing snow.

Der die untere Schraubenbolzenverbindung gefährdende Verschleiß ist abhängig von dem Anstellwinkel der Räumleiste in Bezug auf die Straßenoberfläche. Bei einem kleinen Anstellwinkel, bei welchem die Oberfläche der Räumleiste im Wesentlichen senkrecht zur Sraßenoberfläche verläuft, erfolgt dieser Verschleiß deutlich später, als bei einem größeren Anstellwinkel. Grundsätzlich ist dieser Verschleiß natürlich auch abhängig von der Höhenlage der unteren Schraubenbolzenverbindung oberhalb der Straßenoberfläche, die bei den nach dem Stand der Technik bekannten Verschleißschutzanordnungen der genannten Art je nach Räumschildtyp ungewiss ist.The wear endangering the lower screw bolt connection is dependent on the angle of incidence of the scraper blade in relation to the road surface. In the case of a small angle of attack, at which the surface of the clearing strip runs essentially perpendicular to the road surface, this wear occurs significantly later than in the case of a larger angle of attack. In principle, this wear is of course also dependent on the height of the lower screw bolt connection above the road surface, which is uncertain in the wear protection arrangements of the type mentioned according to the prior art, depending on the type of blade.

Dadurch, dass nach der Lehre der Erfindung die Höhenlagen der Räumleisten einerseits und der Verstärkungselemente andererseits gleichbleibend sind, ist es nach einer vorteilhaften Weiterbildung der Erfindung möglich, die Vorderseiten der Verstärkungselemente mit Abfahrmarkierungen zu versehen, die in Abhängigkeit vom Anstellwinkel der Räumleisten den zulässigen Verschleißbereich abhängig vom Anstellwinkel anzeigen. Hierdurch kann zuverlässig vermieden werden, dass es durch Fehlbedienung zu Unfällen kommt.Because, according to the teaching of the invention, the heights of the clearing strips on the one hand and the reinforcing elements on the other hand are constant, it is possible, according to an advantageous further development of the invention, to provide the front sides of the reinforcing elements with departure markings, which depend on the permissible wear range depending on the angle of the clearing strips show the angle of attack. This can reliably prevent accidents from occurring due to incorrect operation.

Durch die erfindungsgemäß vorgeschlagene exakte Ausrichtung der Verstärkungselemente an den Räumleisten ist es weiterhin möglich, die Anlageflächen der Räumleisten einerseits und der Verstärkungselemente andererseits aneinander anzupassen. Besondere Vorteile ergeben sich, wenn die Räumleisten an ihrer Vorderseite im Bereich der unteren Schraubenbolzenverbindung eine parallel zu ihrer Unterkante verlaufende Aufwölbung aufweisen, die in die eine in der Anlagefläche der Verstärkungselemente vorgesehene Einwölbung passt. Hierdurch werden einerseits eine vollflächige Abstützung und andererseits ein zusätzlicher Formschluss zwischen den Räumleisten und den Verstärkungselementen erzielt.The exact alignment of the reinforcement elements on the clearing strips proposed according to the invention also makes it possible to adapt the contact surfaces of the clearing strips on the one hand and the reinforcing elements on the other hand to one another. Particular advantages result if the clearing strips have a bulge running parallel to their lower edge on their front side in the area of the lower screw bolt connection, which into the one in the The contact surface of the reinforcement elements fits into the bulge provided. In this way, on the one hand, full-surface support and, on the other hand, an additional form fit between the clearing strips and the reinforcing elements are achieved.

Die Herstellung der Verstärkungselemente als Gussstücke aus Hartguss macht es schließlich möglich, die bei der Räumarbeit mit dem Schnee in Berührung kommenden Oberflächen der Verstärkungselemente auf einfache Weise so zu gestalten, dass der mit großer Geschwindigkeit zur Seite hin abfließende Schnee nicht hochspritzt und hierdurch das Sichtfeld des Fahrers des Schneepfluges beeinträchtigt. Um solche Sichtbehinderungen zu vermeiden, schlägt eine besonders vorteilhafte Ausgestaltung der Verschleißschutzanordnung gemäß der Erfindung vor, dass die Verstärkungselemente im Verschleißbereich einen verdickten Mittenabschnitt und seitlich in Richtung auf die Vorderseite der Räumleiste abfallende Flanken aufweist. Der verdickte Mittenabschnitt sorgt für eine große Verschleißfläche an der Unterkante der Verstärkungselemente. Die geneigten Flanken sorgen dafür, dass der bei der Räumarbeit schnell zur Seite gleitende Schnee nicht hochspritzt, sondern weitgehend unbehindert seitlich abfließen kann.The production of the reinforcement elements as cast pieces made of chilled cast iron finally makes it possible to design the reinforcement element surfaces that come into contact with the snow during clearing work in a simple manner so that the snow flowing off to the side at high speed does not splash up and thus the field of vision of the Driver of the snow plow impaired. In order to avoid such visual obstructions, a particularly advantageous embodiment of the wear protection arrangement according to the invention proposes that the reinforcement elements in the wear area have a thickened central section and laterally sloping flanks in the direction of the front side of the clearing strip. The thickened middle section ensures a large wear surface on the lower edge of the reinforcement elements. The inclined flanks ensure that the snow, which quickly slides to the side during clearing work, does not splash up, but can flow off to the side largely unhindered.

Zwei Ausführungsbeispiele von Verschleißschutzanordnungen gemäß der Erfindung werden im Folgenden anhand der Zeichnung näher erläutert. Es zeigen:

Figur 1:
perspektivisch eine am Räumschild eines Schneepfluges montierte Verschleißschutzanordnung gemäß der Erfindung in einer ersten Ausführungsform, geeignet für kleine Anstellwinkel zwischen 0° und 15°;
Figur 2:
einen senkrechten Schnitt durch die in Figur 1 dargestellte Verschleißschutzanordnung;
Figuren 3a, 3b, 3c und 3d:
das in der Verschleißschutzanordnung gemäß Figur 1 verwendete Verstärkungselement in Vorderansicht (a), Seitenansicht (b), perspektivisch von hinten (c) und perspektivisch von vorne (d);
Figur 4:
perspektivisch eine am Räumschild eines Schneepfluges montierte Verschleißschutzanordnung gemäß Erfindung in einer zweiten. Ausführungsform, geeignet für Anstellwinkel zwischen 16° und 30°;
Figur 5:
einen senkrechten Schnitt durch die in Figur 4 dargestellte Verschleißschutzanordnung;
Figur 6a, 6b, 6c und 6d:
das in der Verschleißschutz Anordnung gemäß Figur 4 verwendete Verstärkungselement in Vorderansicht (a), Seitenansicht (b), perspektivisch von hinten (c) und perspektivisch von vorne (d);
Two exemplary embodiments of wear protection arrangements according to the invention are explained in more detail below with reference to the drawing. Show it:
Figure 1:
in perspective a wear protection arrangement according to the invention mounted on the clearing blade of a snow plow in a first embodiment, suitable for small angles of attack between 0 ° and 15 °;
Figure 2:
a vertical section through the in Figure 1 Wear protection arrangement shown;
Figures 3a, 3b, 3c and 3d:
that in the wear protection arrangement according to Figure 1 reinforcement element used in front view (a), side view (b), perspective from the rear (c) and perspective from the front (d);
Figure 4:
in perspective a wear protection arrangement according to the invention mounted on the clearing blade of a snow plow in a second. Embodiment suitable for angles of attack between 16 ° and 30 °;
Figure 5:
a vertical section through the in Figure 4 Wear protection arrangement shown;
Figure 6a, 6b, 6c and 6d:
in the wear protection arrangement according to Figure 4 reinforcement element used in front view (a), side view (b), perspective from the rear (c) and perspective from the front (d);

In der Zeichnung ist der Räumschild eines Schneepfluges mit dem Bezugszeichen 1 bezeichnet. An der Unterkante dieses Räumschildes 1 sind nebeneinander mehrere Räumleisten 2 befestigt (vergl. Figuren 1 und 4). Diese Räumleisten 2 bestehen in ihrem Verschleißbereich jeweils aus einer Grundplatte 3 und einer Deckplatte 4, zwischen denen eine Verschleißgummischicht 5 einvulkanisiert ist. In diese Verschleißgummischicht 5 sind Hartstoffkörper 6, die zum Beispiel aus Schmelzkorund bestehen können. Die Deckplatte 4 ist im oberen Randbereich der Räumleiste 2 derart in Richtung auf die Grundplatte 3 abgekröpft , dass sie auf der Grundplatte 3 aufliegt und in diesem Bereich zusammen mit der Grundplatte 3 einen Befestigungshals 7 bildet , mit welchem die Räumleiste 2 an der Unterkante des Räumschildes 1 mithilfe von Schrauben 8 befestigt ist.The clearing blade of a snow plow is denoted by the reference number 1 in the drawing. At the lower edge of this clearing blade 1, several clearing strips 2 are attached next to one another (cf. Figures 1 and 4th ). These clearing strips 2 each consist in their wear area of a base plate 3 and a cover plate 4, between which a wear rubber layer 5 is vulcanized. In this wear rubber layer 5 are hard material bodies 6, which can consist of fused corundum, for example. The cover plate 4 is angled in the upper edge area of the clearing bar 2 in the direction of the base plate 3 in such a way that it rests on the base plate 3 and in this area together with the base plate 3 forms a fastening neck 7 with which the clearing bar 2 is attached to the lower edge of the clearing blade 1 is secured with screws 8.

Auf die Vorderseite der Räumleisten 2 sind in besonders dem Verschleiß ausgesetzten Bereichen plattenförmige Verstärkungselemente 9 aufmontiert, die jeweils als einteilige Gussstücke aus Hartguss ausgebildet sind. Zur Befestigung dieser Verstärkungselemente 9 an der Räumleiste 2 und dem Räumschild 1 ist zunächst eine obere Schraubenbolzenverbindung vorgesehen, welche mindestens einen Schraubenbolzen 10 aufweist, der durch miteinander fluchtende Bohrungen im unteren Rand des Räumschildes 1, im Befestigungshals 7 der Räumleiste 2 und im Verstärkungselement 9 geführt ist. Weiterhin ist zur Festlegung der Verstärkungselemente 9 in der Verschleißschutzanordnung eine untere Schraubenbolzenverbindung mit mindestens einem Schraubenbolzen 11 vorgesehen, der unterhalb der Unterkante des Räumschildes 1 durch miteinander fluchende Bohrungen im Verstärkungselement 9 und in der Räumleiste 2 geführt ist, wobei die Bohrung in der Räumleiste 2 zwischen deren Verschleißbereich und deren Befestigungshals 7 angeordnet ist.On the front side of the clearing strips 2, plate-shaped reinforcing elements 9 are mounted in areas particularly exposed to wear, each of which is designed as one-piece cast pieces made of chilled cast iron. To attach these reinforcing elements 9 to the clearing bar 2 and the clearing blade 1, an upper screw bolt connection is initially provided, which has at least one screw bolt 10, which is guided through aligned bores in the lower edge of the clearing blade 1, in the fastening neck 7 of the clearing bar 2 and in the reinforcing element 9 is. Furthermore, a lower screw bolt connection with at least one screw bolt 11 is provided to fix the reinforcing elements 9 in the wear protection arrangement, which is guided below the lower edge of the clearing blade 1 through mutually aligned bores in the reinforcing element 9 and in the clearing bar 2, the bore in the clearing bar 2 between whose wear area and whose fastening neck 7 is arranged.

Nach der Lehre der Erfindung sind die Bohrlöcher der oberen Schraubenbolzenverbindung in den Verstärkungselementen 9 als Langlöcher ausgebildet, die vertikal zum unteren Rand der Räumleiste 2 aufgeweitet sind. Hierdurch wird die Höhenlage der Verstärkungselemente 9 in der fertig montierten Verschleißanordnung automatisch an die jeweilige Höhenlage der Räumleiste angepasst, und zwar auch dann, wenn typbedingt die Höhenlage der Bohrlöcher in der Unterkante des Räumschildes unterschiedlich ist. Die Verwendung von Langlöchern anstelle von kreisrunden Bohrungen ist für die Haltbarkeit der Schraubverbindungen insofern ohne Belang, als die Schrauben in jedem Fall so intensiv gespannt werden, dass alle im Betrieb auftretenden statischen und dynamischen Belastungen allein durch die Flächenpressung der flächig aufeinander liegenden Teile sichergestellt wird, so dass es auf von den Schraubenbolzen aufzunehmende Scherkräfte nicht ankommt.According to the teaching of the invention, the boreholes of the upper screw bolt connection in the reinforcing elements 9 are designed as elongated holes which are widened vertically to the lower edge of the clearing strip 2. As a result, the height of the reinforcement elements 9 in the fully assembled wear arrangement is automatically adapted to the respective height of the clearing strip, even if the height of the drill holes in the lower edge of the clearing blade is different due to the type. The use of elongated holes instead of circular bores is irrelevant for the durability of the screw connections insofar as the screws are always tensioned so intensively that all static and dynamic loads occurring during operation are ensured solely by the surface pressure of the flat parts, so that it does not depend on the shear forces to be absorbed by the screw bolts.

Wegen der durch die Erfindung ermöglichten Anpassung an die unterschiedlichsten Einbausituationen an der Unterkante des Räumschildes 1 ist es erstmals möglich, die Verstärkungselemente 9 in sehr großer Stückzahl aus Hartguss zu fertigen, ohne dass nachträgliche Anpassungsarbeiten nötig sind.Because of the adaptation to a wide variety of installation situations on the lower edge of the clearing blade 1 made possible by the invention, it is possible for the first time to manufacture the reinforcing elements 9 in very large numbers from chilled cast iron without the need for subsequent adaptation work.

Beim Ausführungsbeispiel gemäß den Figuren 1-3 sind in der oberen Schraubenbolzenverbindung drei Langlöcher nebeneinander in dem Verstärkungselement vorgesehen. Die untere Schraubenbolzenverbindung weist demgegenüber zwei nebeneinander angeordnete Schraubenbolzen auf. Auch durch diese Maßnahme ist es möglich, dieses Verstärkungselement 9 noch besser an unterschiedliche Einbausituationen anzupassen. Weil das Verstärkungselement 9 relativ zu der Räumleiste 2 nach der Lehre der Erfindung automatisch immer die gleiche Höhenlage relativ zur Räumleiste 2 einnimmt, ist es möglich, die Auflageflächen zwischen Räumleiste 2 und Verstärkungselemente 9 aneinander anzupassen. So weist hier die Räumleiste 2 beim Ausführungsbeispiel der Figuren 1-3 eine sich über ihre gesamte Länge erstreckende konvexe Aufwölbung 12 auf, die formgenau in eine angepasste konkave Einwölbung 13 an der Rückseite des Verstärkungselementes 9 passt. Hierdurch ergibt sich ein optimaler Halt des Verstärkungselementes 9 an der Räumleiste 2.In the embodiment according to Figures 1-3 three elongated holes are provided next to one another in the reinforcement element in the upper screw bolt connection. In contrast, the lower screw bolt connection has two screw bolts arranged next to one another. This measure also makes it possible to adapt this reinforcing element 9 even better to different installation situations. Because the reinforcing element 9 automatically always assumes the same height position relative to the clearing bar 2 relative to the clearing bar 2 according to the teaching of the invention, it is possible to adapt the bearing surfaces between clearing bar 2 and reinforcing elements 9 to one another. So here has the clearing strip 2 in the embodiment of Figures 1-3 a convex bulge 12 extending over its entire length, which precisely fits into an adapted concave bulge 13 on the rear side of the reinforcing element 9. This results in an optimal hold of the reinforcement element 9 on the clearing strip 2.

Wegen der gleichen Höhenlage von Räumleiste 2 und Verstärkungselement 9 ist es möglich, an der Vorderseite derVerstärkungselemente9 eine für viele Einsatzfälle geltende Abfahrmarkierung 14 anzubringen, bis zu welcher das Verstärkungselement 9 abgenutzt werden kann, ohne dass die untere Schraubenbolzenverbindung durch Verschleiß gefährdet wird. Der Abfahrbereich ist natürlich von dem Anstellwinkel abhängig, mit welchem die Verschleißschutzanordnung zum Einsatz kommt. Die aus den Figuren 1-3 erkennbaren Abfahrmarkierungen gelten für Anstellwinkel von 0° bis 15°.Because the clearing strip 2 and reinforcing element 9 are at the same height, it is possible to apply a departure marking 14, which is valid for many applications, to the front of the reinforcing elements 9, up to which the reinforcing element 9 can be worn without the lower screw bolt connection being endangered by wear. The departure area is of course dependent on the angle of attack with which the wear protection arrangement is used Use comes. The ones from the Figures 1-3 recognizable departure markings apply to angles of incidence from 0 ° to 15 °.

Wie sich schließlich noch aus den Figuren 3a bis 3d ergibt, hat das Verstärkungselement 9 einen verdickten Mittelabschnitt 9a, um eine möglichst große und tragfähige Verschleißfläche zur Verfügung zu stellen, und seitlich in Richtung auf die Vorderseite der Räumleiste 2 abfallende Flanken 9b. Diese flach abfallenden Flanken 9b sorgen bei der Räumarbeit für einen besseren seitlichen Abfluss des Schnees entlang der Räumleiste, wodurch die Gefahr vermieden wird, dass Schnee während der Räumarbeit hochspritzt und dem Fahrer des Schneepfluges die Sicht nimmt.As can be seen from the Figures 3a to 3d results, the reinforcing element 9 has a thickened central portion 9a in order to provide the largest possible and load-bearing wear surface, and laterally sloping flanks 9b in the direction of the front side of the clearing strip 2. These gently sloping flanks 9b ensure better lateral discharge of the snow along the clearing strip during clearing work, which avoids the risk of snow spraying up during the clearing work and robbing the driver of the snow plow from sight.

Das Ausführungsbeispiel der Figuren 4-6 entspricht weitgehend dem Ausführungsbeispiel der Figuren 1-3. Dort sind allerdings sowohl die obere Schraubenbolzenverbindung als auch die untere Schraubenbolzenverbindung jeweils mit nur einem Schraubbolzen und entsprechen weniger Bohrlöchern versehen. Außerdem ist die dort dargestellte Verschleißschutzanordnung für Anstellwinkel zwischen 16° und 30° vorgesehen, wodurch sich eine entsprechend andere Lage der Abfahrmarkierungen 14 ergibt.The embodiment of the Figures 4-6 corresponds largely to the embodiment of Figures 1-3 . There, however, both the upper screw bolt connection and the lower screw bolt connection are each provided with only one screw bolt and correspond to fewer drill holes. In addition, the wear protection arrangement shown there is provided for angles of incidence between 16 ° and 30 °, which results in a correspondingly different position of the departure markings 14.

Claims (4)

  1. Wear-protection assembly for the clearing blade (1) of a snowplough, which wear-protection assembly comprises a plurality of clearing strips (2), which are arranged side by side and can be fastened to the lower edge of the clearing blade (1) by means of a fastening neck (7), on the front side of which clearing strips planar reinforcing elements (9) are arranged in subregions at risk of wear, which reinforcing elements each reach from the wear edge of the clearing strip (2) as far as over the fastening neck (7) thereof, wherein the parts of said wear-protection assembly are interconnected and connected to the lower edge of the clearing blade (1) by means of a screw connection, which comprises, on one hand, an upper threaded-bolt connection having at least one threaded bolt (10), which is guided through bores aligned with one another in the lower edge of the clearing blade (1), in the fastening neck (7) of the clearing strip (2) and in the reinforcing element (9), and comprises, on the other hand, a lower threaded-bolt connection having at least one threaded bolt (11), which is guided, below the bottom edge of the clearing blade (1), through bores aligned with one another in the reinforcing element (9) and in the clearing strip (2),
    wherein the bore in the clearing strip (2) is arranged between the wear region thereof and the fastening neck (7) thereof,
    characterised in that the reinforcing elements (9) are each produced as single-part castings from chilled cast iron, and in that the bores provided for the upper threaded-bolt connection in the reinforcing elements (9) are designed as slots which are widened vertically in relation to the lower edge of the clearing blade (1).
  2. Wear-protection assembly according to claim 1, characterised in that wear indicators (14) are arranged on the front side of the reinforcing elements (9) depending on the pitch of the wear-protection assembly and the respective position of the lower threaded-bolt connection.
  3. Wear-protection assembly according to claim 1, characterised in that the clearing strips (2) comprise, at the front side thereof in the region of the lower threaded-bolt connection, a convex portion (12) extending in parallel with the bottom edge of the clearing strip, which convex portion fits into a concave portion (13) provided in the contact surface of the reinforcing elements (9).
  4. Wear-protection assembly according to claim 1, characterised in that in the wear region, the reinforcing elements (9) comprise a thickened central portion (9a) and, at the sides, comprise edges (9b) that slope downwards towards the front side of the clearing strip (2).
EP19749211.9A 2018-07-20 2019-07-16 Wear protection assembly for the clearing blade of a snowplow Active EP3625392B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018117655.4A DE102018117655A1 (en) 2018-07-20 2018-07-20 Wear protection arrangement for the snow plow blade
PCT/EP2019/069106 WO2020016220A1 (en) 2018-07-20 2019-07-16 Wear protection assembly for the clearing blade of a snowplow

Publications (2)

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EP3625392A1 EP3625392A1 (en) 2020-03-25
EP3625392B1 true EP3625392B1 (en) 2021-05-19

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EP19749211.9A Active EP3625392B1 (en) 2018-07-20 2019-07-16 Wear protection assembly for the clearing blade of a snowplow

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EP (1) EP3625392B1 (en)
DE (1) DE102018117655A1 (en)
WO (1) WO2020016220A1 (en)

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Publication number Priority date Publication date Assignee Title
EP3940145B1 (en) 2020-07-16 2024-03-27 Gestion Pihm Inc. Sweeping blade device and sweeping blade assembly for a vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934654A (en) * 1974-09-06 1976-01-27 Kennametal Inc. Earthworking blade device
DE102013011436A1 (en) * 2013-07-10 2015-01-15 Küper Gmbh & Co. Kg Two-piece curb deflector
DE102014006274B4 (en) * 2014-05-02 2016-05-25 Küper Gmbh & Co. Kg Curb deflector for the plow blade of a snow plow
DE102015117001A1 (en) 2015-10-06 2017-04-06 Küper Gmbh & Co. Kg Wear protection arrangement for the snow blade of a snow plow
US9938678B2 (en) * 2016-07-07 2018-04-10 Lakin General Corporation Plow blade wear member

Non-Patent Citations (1)

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Title
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WO2020016220A1 (en) 2020-01-23
DE102018117655A1 (en) 2020-01-23
EP3625392A1 (en) 2020-03-25

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