EP4026949B1 - Scraper bars assembly and scraper bars cartridge - Google Patents
Scraper bars assembly and scraper bars cartridge Download PDFInfo
- Publication number
- EP4026949B1 EP4026949B1 EP22020005.9A EP22020005A EP4026949B1 EP 4026949 B1 EP4026949 B1 EP 4026949B1 EP 22020005 A EP22020005 A EP 22020005A EP 4026949 B1 EP4026949 B1 EP 4026949B1
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- EP
- European Patent Office
- Prior art keywords
- cutting edge
- segments
- cassette
- scraper
- segment
- 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.)
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Links
- 238000006073 displacement reaction Methods 0.000 claims description 15
- 150000003839 salts Chemical class 0.000 description 6
- 238000011109 contamination Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Images
Classifications
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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
- E01H5/062—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 by scraper blades displaceable for shock-absorbing purposes
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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
Definitions
- the invention relates to a scraper bar arrangement for attachment to a plow blade according to the preamble of patent claim 1 and a scraper bar cassette for use in a scraper bar arrangement according to the invention according to the preamble of patent claim 9.
- the scraper bar can be made of steel, for example.
- a scraper bar is typically a plate-shaped element that extends essentially the entire length of the plow blade.
- scraper bar arrangements have already become known which include scraper bar segments that are adjustable in the height direction. Such training is available, for example, in the US 5743032 and the SE 454279 described.
- a plow with a width of 3 m which for stability reasons consists of two or three rigid elements that can move slightly relative to each other, has a relatively poor adaptability to punctual grooves or holes.
- the present invention therefore aims to further develop a scraper bar arrangement in such a way that the adaptability is increased and the clearing result on uneven road surfaces is improved.
- the present invention further aims to facilitate the interchangeability of the scraper blades and to increase the stability of adjustable scraper blade elements.
- the scraper bar arrangement according to the invention therefore consists of a combination of a sliding plate with a large number of adjustable scraper bar segments. Because the scraper bar segments are independently adjustable in the height direction, ie transversely to the scraper edge, they can adapt to uneven roads while at the same time the rigid scraper edge remains in contact with the road surface. When individual scraper bar segments are extended downwards, they can also scrape off the snow from lower-lying areas of the road, such as grooves or holes. However, if there is no space below the scraper edge of the rigid scraper bar to extend the scraper bar segments, they remain in the upwardly retracted position due to the own weight of the plow blade.
- a further feature according to the invention lies in the subdivision of the scraper bar segments arranged along the longitudinal extent of the rigid scraper bar into at least two, preferably at least three, groups of scraper bar segments.
- the adjustable scraper segments of a group are each combined in a scraper cassette, in which the scraper segments are adjustable in a direction that runs transversely to a scraper edge of the scraper segments.
- the arrangement of a plurality of scraper segments in a scraper cassette enables the scraper segments to be assembled and dismantled together, so that downtime is minimized.
- the scraper cassette is viewed as a wearing part that can be easily replaced if necessary.
- the scraper bar segments are slidably displaceable parallel to the sliding plate.
- the scraper bar segments can be supported on the sliding plate, so that the scraping forces that occur during contact with the road are absorbed not only by the individual scraper bar segments, but also by the sliding plate behind them.
- the cutting edge segments are designed as flat plate-like elements, the plate plane of which runs parallel to the plane of the rigid sliding plate.
- the feature that the scraper segments slide on the rigid slide plate during the displacement movement does not mean that the scraper segments and the rigid slide plate must directly touch each other.
- the sliding can also be achieved with the help of an intermediate layer or an intermediate element, which preferably has friction-optimized properties.
- the sliding plate has a fastening section which is fastened to a scraper holder.
- the scraper cassette can be designed as a standard component, while any necessary adaptation to different assembly situations, e.g. different hole patterns of the plow blade or the scraper bar carrier, can be done by means of a correspondingly adapted design of the sliding plate.
- a preferred embodiment provides that the fastening section of the sliding plate is secured to the scraper bar carrier with the aid of fastening elements, in particular screw bolts, which pass through holes formed in the fastening section is attached.
- fastening elements in particular screw bolts
- the bores are designed as countersunk bores, which enables a recessed arrangement of the head of the fastening elements or screw bolts.
- the scraper cassette has a housing that is open on the side facing the cover element Includes cutting edge segments.
- the open housing is closed by the cover element as soon as the housing is attached to the scraper bar support.
- the scraper segments each have an elongated guide slot running in the direction of displacement and that positioning bushings are attached to the sliding plate, which pass through the guide slot and form a guide element for the displacement movement of the scraper segments .
- the positioning bushings advantageously each have a hole with an internal thread for a fastening screw, with which a plate-like cover element of the scraper cassette is fastened.
- each scraper segment is assigned at least one spring element, in particular a helical spring, arranged in the scraper cassette, against which the respective scraper segment is adjustable.
- two adjacent scraper segments each have form-fitting elements that interact with each other laterally, which limit the relative displacement movement of the scraper segments. This limits the maximum stroke of each scraper segment relative to its adjacent scraper segment. If the maximum permissible stroke relative to the adjacent scraper segment is significantly smaller than the stroke possible without limitation, e.g. less than half of the otherwise possible stroke, this means that a scraper segment cannot be fully extended individually, but only at a time Course with the neighboring cutting edge segments. It is preferably provided here that the interoperating form-fitting elements are formed by a laterally projecting pin of one scraper segment and by a lateral groove of the other scraper segment, into which the pin engages.
- each scraper segment is assigned at least one spring element, in particular a helical spring, arranged in the scraper cassette, against which the respective scraper segment can be adjusted.
- the scraper bar cassette preferably forms a housing for the scraper bar segments that is open on the side facing the cover element.
- the scraper bar segments preferably each have an elongated guide slot running in the direction of displacement, positioning bushings being attached to the scraper bar cassette, which pass through the guide slot and form a guide element for the displacement movement of the scraper bar segments.
- the positioning bushings preferably have a bore with an internal thread for a fastening screw, with which a plate-like cover element of the scraper cassette is fastened.
- FIG. 1 a representation of a plow blade which is equipped with a scraper bar arrangement according to the invention
- Fig. 2 a cross-sectional view of the scraper bar arrangement
- Fig. 3 a front view of a scraper cassette in an open state.
- a plow blade of a snow plow is designated 1.
- the plow blade 1 carries on its lower side facing the road surface a scraper bar arrangement 2, which comprises a plurality of scraper bar cassettes 4 adjoining one another in the longitudinal direction, of which in Fig. 1 only one is shown.
- the cutting edge cassette 4 comprises a plurality of cutting edge segments 5, which are guided independently of one another in the direction of the double arrow 6.
- the scraper bar arrangement 2 is attached to a scraper bar support 7 which is L-shaped in cross section.
- the scraper bar arrangement 2 comprises a sliding plate 3, which lies in a fastening section 9 between the scraper bar segment 5 and one leg of the scraper bar carrier 7.
- the sliding plate 3 is fastened in the fastening section 9 to the scraper bar support 7 with the aid of screw bolts 10, the head of the screw bolts 10 being sunk into the rigid sliding plate 3 so that the adjustable scraper bar segments 5 can slide along a flat surface on the sliding plate 3.
- the sliding surface of the sliding plate 3 is in the in Fig. 2 Example shown is formed by a sliding support 11.
- the adjustable scraper segments 5 are held in the scraper cassette 4 with the help of positioning bushings 12 and 13, which can be, for example, by means of a Welded connection are attached to the sliding plate 3 and have an internal thread into which fastening screws 16 are screwed in order to fasten a plate-like cover element 8 of the scraper cassette 4 to form a housing on the sliding plate 3.
- the cutting edge segment 5 has a guide slot 15 ( Fig. 3 ), in which the positioning bushings 12 and 13 are arranged.
- Coil springs 14 engage on the scraper bar segments 5, as shown better Fig. 3 is visible.
- Fig. 3 It can be seen that two adjacent cutting edge segments 5 each have form-fitting elements that interact with each other laterally, namely a pin 18 and a groove 19, into which the pin 18 engages.
- the height of the groove 19 in the direction of the displacement movement 6 limits the stroke of a scraper segment 5 relative to the adjacent scraper segment 5.
- the scraper assembly has the following characteristics.
- the system basically consists of two assemblies, the sliding plate and the scraper cassette with the scraper segments.
- the sliding plate serves as a connection to the shield. It is screwed to the shield body together with the existing rigid scraper bar. It should be noted that the existing holes must be lowered to ensure a flat sliding surface for the cutting edge segments.
- the advantage of this sliding plate is that it is independent of the hole patterns of different plow types. This will be the hole pattern of the plow to be assembled transferred to the sliding plate and the pre-assembled scraper bar cassette with the vertically movable, spring-loaded scraper bar segments is mounted on it.
- the permanently welded threaded bushings are located on the sliding plate. Together with the hardened drill bushings (wear-resistant) mounted on them, they serve to guide the spring-loaded cutting edge segments.
- the cover element is positioned and screwed together. This guarantees stable lateral guidance of the vertically movable cutting edge segments.
- the base body also has a sliding surface on which the movable cutting edge segments slide and are supported.
- the spring holders with the pre-tensioned springs are also pre-assembled on the base body, making it particularly easy to change the wear elements.
- the pre-assembled base body is screwed to the scraper holder of the shield body during assembly.
- the cutting edge segments are then inserted individually. This has the great advantage that assembly and replacement of worn scraper bar segments can be carried out quickly without heavy lifting.
- the pre-assembled cover unit is then positioned and screwed onto the system using the threaded bushings.
- the cover unit consists of a cover plate, a welded-on sliding plate with cutouts to absorb dirt and minimize friction, and a seal that protects the system from contamination from above.
- the solution using your own cover unit offers the advantage of easy installation.
- the spring preload force of the individual scraper bar segments is dimensioned so that they are completely retracted when used on flat roads, so that the plow rests on both the scraper bar segments.
- the individual scraper strip segments now adapt optimally to the given surface thanks to the spring preload force.
- Another advantage of the scraper bar arrangement according to the invention is that the snow can also be pulled out of driveways or dead ends, i.e. in the opposite clearing direction.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Repair (AREA)
- Preliminary Treatment Of Fibers (AREA)
Description
Die Erfindung betrifft eine Schürfleistenanordnung zur Befestigung an einem Pflugschild gemäß dem Oberbegriff des Patentanspruchs 1 und eine Schürfleistenkassette für die Verwendung in einer erfindungsgemäßen Schürfleistenanordnung gemäß dem Oberbegriff des Patentanspruchs 9.The invention relates to a scraper bar arrangement for attachment to a plow blade according to the preamble of
Es ist bereits bekannt im unteren Endbereich eines Pflugs, insbesondere eines Schneepflugs, eine oder mehrere auswechselbare Schürfleisten anzubringen, damit der durch die Reibung verursachte Verschleiß sich nicht auf das Pflugschild selbst, sondern auf ein separates, auswechselbares Bauteil auswirkt. Die Schürfleiste kann beispielsweise aus Stahl hergestellt sein. Bei einer Schürfleiste handelt es sich typischerweise um ein plattenförmiges Element, das sich im Wesentlichen über die gesamte Länge des Pflugschilds erstreckt.It is already known to attach one or more replaceable scrapers to the lower end area of a plow, in particular a snow plow, so that the wear caused by friction does not affect the plow blade itself, but rather a separate, replaceable component. The scraper bar can be made of steel, for example. A scraper bar is typically a plate-shaped element that extends essentially the entire length of the plow blade.
Da eine starre Schürfleiste sich nicht an Bodenunebenheiten anpassen kann, sind bereits Schürfleistenanordnungen bekannt geworden, die in Höhenrichtung verstellbare Schürfleistensegmente umfassen. Derartige Ausbildungen sind beispielswiese in der
Weiters bilden die Dokumente
Bodenunebenheiten sind auf verschiedene Ursachen zurückzuführen. Durch den Schwerverkehr kommt es in vielen Bereichen zu erheblichen Spurrillen im Straßenbelag. In Gemeindegebieten sind die Straßen meist bombiert gestaltet, damit das Oberflächenwasser seitlich abgeleitet werden kann. In abgelegenen Ortsteilen haben die Straßen oft einen schlechten Zustand und weisen Schlaglöcher und dgl. auf.Uneven floors can be attributed to various causes. This happens in many cases due to heavy traffic Areas lead to significant ruts in the road surface. In municipal areas, the streets are usually cambered so that surface water can be drained away to the sides can. In remote areas, the roads are often in poor condition and have potholes and the like.
Beim Räumen von Schnee verursacht eine unebene Fahrbahn große Probleme. Je mehr Restschnee bei der mechanischen Räumung mit dem Schneepflug auf der Fahrbahnoberfläche haften bleiben, desto mehr Streusalz muss aufgewendet werden, um die Straße wieder schneefrei zu bekommen. Die Verwendung von Streusalz hat den Nachteil, dass das Entfernen des Schnees auf Grund der physikalischen und chemischen Reaktionen längere Zeit in Anspruch nimmt. Außerdem verursacht Streusalz hohe Kosten, wenn man berücksichtigt, dass eine Kleinstadt durchschnittlich ca. 20-25 Tonnen Streusalz pro Schneetag verbraucht. Schließlich belastet Streusalz die Umwelt.An uneven road surface causes major problems when clearing snow. The more remaining snow remains on the road surface during mechanical clearing with the snow plow, the more road salt must be used to clear the road of snow again. The disadvantage of using road salt is that removing the snow takes a long time due to the physical and chemical reactions. In addition, road salt causes high costs, considering that a small town uses an average of around 20-25 tons of road salt per snow day. After all, road salt pollutes the environment.
Eine verbesserte mechanische Räumung durch eine bessere Anpassungsfähigkeit der Schneepflüge an die Straßenoberfläche würde dazu führen, dass der Winterdienst rascher und kostengünstiger vonstatten geht. Allerdings hat ein Pflug mit 3 m Breite, der stabilitätsbedingt aus zwei oder drei starren Elementen besteht, die sich relativ zueinander ein wenig bewegen können, eine relativ schlechte Anpassungsfähigkeit an punktuelle Rillen oder Löcher.Improved mechanical clearance through better adaptability of snow plows to the road surface would result in winter road clearance being carried out more quickly and cost-effectively. However, a plow with a width of 3 m, which for stability reasons consists of two or three rigid elements that can move slightly relative to each other, has a relatively poor adaptability to punctual grooves or holes.
Die vorliegende Erfindung zielt daher darauf ab, eine Schürfleistenanordnung dahingehend weiterzuentwickeln, dass die Anpassungsfähigkeit erhöht und das Räumergebnis bei unebener Straßenoberfläche verbessert wird. Die vorliegende Erfindung zielt weiters darauf ab, die Auswechselbarkeit der Schürfleisten zu erleichtern und die Stabilität von verstellbaren Schürfleistenelementen zu erhöhen.The present invention therefore aims to further develop a scraper bar arrangement in such a way that the adaptability is increased and the clearing result on uneven road surfaces is improved. The present invention further aims to facilitate the interchangeability of the scraper blades and to increase the stability of adjustable scraper blade elements.
Die Aufgabe wird erfindungsgemäß durch eine Schürfleistenanordnung, welche die im Patentanspruch 1 angeführten Merkmale aufweist, und durch eine Schürfleistenkassette, welche die im Patentanspruch 9 angeführten Merkmale aufweist, gelöst.The object is achieved according to the invention by a scraper arrangement which has the features listed in
Die erfindungsgemäße Schürfleistenanordnung besteht somit aus einer Kombination einer Gleitplatte mit einer Vielzahl von verstellbaren Schürfleistensegmenten. Dadurch, dass die Schürfleistensegmente unabhängig voneinander in Höhenrichtung, d.h. quer zur Schürfkante, verstellbar sind, können sich diese an Straßenunebenheiten anpassen, während gleichzeitig die starre Schürfkante im Kontakt mit der Straßenoberfläche bleibt. Im nach unten ausgefahrenen Zustand einzelner Schürfleistensegmente können diese den Schnee auch von tiefer gelegenen Straßenstellen, wie z.B. Rillen oder Löchern, abkratzen. Wenn unterhalb der Schürfkante der starren Schürfleiste hingegen kein Raum für ein Ausfahren der Schürfleistensegmente vorhanden ist, verbleiben diese auf Grund des Eigengewichts des Pflugschilds in der nach oben eingefahrenen Position.The scraper bar arrangement according to the invention therefore consists of a combination of a sliding plate with a large number of adjustable scraper bar segments. Because the scraper bar segments are independently adjustable in the height direction, ie transversely to the scraper edge, they can adapt to uneven roads while at the same time the rigid scraper edge remains in contact with the road surface. When individual scraper bar segments are extended downwards, they can also scrape off the snow from lower-lying areas of the road, such as grooves or holes. However, if there is no space below the scraper edge of the rigid scraper bar to extend the scraper bar segments, they remain in the upwardly retracted position due to the own weight of the plow blade.
Ein weiteres erfindungsgemäßes Merkmal liegt in der Unterteilung der entlang der Längserstreckung der starren Schürfleiste angeordneten Schürfleistensegmente in wenigstens zwei, bevorzugt, wenigstens drei Gruppen von Schürfleistensegmenten. Die verstellbaren Schürfleistensegmente einer Gruppe sind hierbei jeweils in einer Schürfleistenkassette zusammengefasst, in der die Schürfleistensegmente in einer quer zu einer Schürfkante der Schürfleistensegmente verlaufenden Richtung verstellbar geführt sind. Die Anordnung einer Mehrzahl von Schürfleistensegmenten in einer Schürfleistenkassette ermöglicht die gemeinsame Montage und Demontage der Schürfleistensegmente, sodass die Stillstandzeiten minimiert werden. Die Schürfleistenkassette wird hierbei als Verschleißteil betrachtet, das bei Bedarf in einfacher Weise ausgetauscht wird.A further feature according to the invention lies in the subdivision of the scraper bar segments arranged along the longitudinal extent of the rigid scraper bar into at least two, preferably at least three, groups of scraper bar segments. The adjustable scraper segments of a group are each combined in a scraper cassette, in which the scraper segments are adjustable in a direction that runs transversely to a scraper edge of the scraper segments. The arrangement of a plurality of scraper segments in a scraper cassette enables the scraper segments to be assembled and dismantled together, so that downtime is minimized. The scraper cassette is viewed as a wearing part that can be easily replaced if necessary.
Gemäß einer bevorzugten Weiterbildung der Erfindung sind die Schürfleistensegmente parallel zu der Gleitplatte an dieser gleitend verschiebbar. Auf diese Weise können sich die Schürfleistensegmente an der Gleitplatte abstützen, sodass die beim Straßenkontakt auftretenden Schürfkräfte nicht nur von den einzelnen Schürfleistensegmenten, sondern auch von der dahinter liegenden Gleitplatte aufgenommen werden. Dabei sind die Schürfleistensegmente als flache plattenartige Elemente ausgebildet, deren Plattenebene parallel zur Ebene der starren Gleitplatte verläuft.According to a preferred development of the invention, the scraper bar segments are slidably displaceable parallel to the sliding plate. In this way, the scraper bar segments can be supported on the sliding plate, so that the scraping forces that occur during contact with the road are absorbed not only by the individual scraper bar segments, but also by the sliding plate behind them. The cutting edge segments are designed as flat plate-like elements, the plate plane of which runs parallel to the plane of the rigid sliding plate.
Das Merkmal, wonach die Schürfleistensegmente bei der Verschiebebewegung an der starren Gleitplatte gleiten, bedeutet nicht, dass die Schürfleistensegmente und die starre Gleitplatte einander direkt berühren müssen. Das Gleiten kann auch unter Vermittlung einer Zwischenschicht oder eines Zwischenelements erfolgen, welche(s) bevorzugt reibungsoptimierte Eigenschaften aufweist.The feature that the scraper segments slide on the rigid slide plate during the displacement movement does not mean that the scraper segments and the rigid slide plate must directly touch each other. The sliding can also be achieved with the help of an intermediate layer or an intermediate element, which preferably has friction-optimized properties.
Zur Befestigung der Schürfleistenkassette an dem Pflugschild oder an dessen Schürfleistenträger ist bevorzugt vorgesehen, dass die Gleitplatte einen Befestigungsabschnitt aufweist, der an einem Schürfleistenträger befestigt ist. Die Schürfleistenkassette kann hierbei als Standardbauteil ausgeführt werden, während eine ggf. erforderliche Anpassung an unterschiedliche Montagesituationen, z.B. unterschiedliche Lochmuster des Pflugschilds oder des Schürfleistenträgers, mittels einer entsprechend angepassten Ausbildung der Gleitplatte erfolgen kann.In order to attach the scraper cassette to the plow blade or to its scraper holder, it is preferably provided that the sliding plate has a fastening section which is fastened to a scraper holder. The scraper cassette can be designed as a standard component, while any necessary adaptation to different assembly situations, e.g. different hole patterns of the plow blade or the scraper bar carrier, can be done by means of a correspondingly adapted design of the sliding plate.
Um eine gemeinsame Befestigung der starren Schürfleiste und der Gleitplatte an dem Pflugschild oder an dessen Schürfleistenträger zu erlauben, sieht eine bevorzugte Ausbildung vor, dass der Befestigungsabschnitt der Gleitplatte mit Hilfe von Befestigungselementen, insbesondere Schraubbolzen, welche in dem Befestigungsabschnitt ausgebildete Bohrungen durchsetzen, an dem Schürfleistenträger befestigt ist. Um eine ebene Gleitfläche für die Schürfleistensegmente an der Gleitplatte zu gewährleisten, ist es hierbei vorteilhaft, wenn die Bohrungen als Senkbohrungen ausgeführt sind, was eine versenkte Anordnung des Kopfes der Befestigungselemente bzw. Schraubbolzen ermöglicht.In order to allow a joint attachment of the rigid scraper bar and the sliding plate to the plow blade or to its scraper bar carrier, a preferred embodiment provides that the fastening section of the sliding plate is secured to the scraper bar carrier with the aid of fastening elements, in particular screw bolts, which pass through holes formed in the fastening section is attached. In order to ensure a flat sliding surface for the cutting edge segments on the sliding plate, it is advantageous if the bores are designed as countersunk bores, which enables a recessed arrangement of the head of the fastening elements or screw bolts.
Eine besonders einfache Bauweise mit einer minimalen Anzahl an Bauteilen ist gemäß einer bevorzugen Ausbildung vorgesehen, wenn die Schürfleistenkassette ein an der dem Deckelelement zugewandten Seite offenes Gehäuse für die Schürfleistensegmente umfasst. Das offene Gehäuse wird hierbei durch das Deckelelement verschlossen, sobald das Gehäuse an dem Schürfleistenträger befestigt wird.A particularly simple design with a minimum number of components is provided according to a preferred embodiment if the scraper cassette has a housing that is open on the side facing the cover element Includes cutting edge segments. The open housing is closed by the cover element as soon as the housing is attached to the scraper bar support.
Für eine konstruktiv einfache Befestigung und Führung der Schürfleistensegmente in der Schürfleistenkassette ist bevorzugt vorgesehen, dass die Schürfleistensegmente jeweils einen länglichen, in Verschieberichtung verlaufenden Führungsschlitz aufweisen und dass an der Gleitplatte Positionierungsbuchsen befestigt sind, welche den Führungsschlitz durchsetzen und ein Führungselement für die Verschiebebewegung der Schürfleistensegmente ausbilden.For a structurally simple attachment and guidance of the scraper segments in the scraper cassette, it is preferably provided that the scraper segments each have an elongated guide slot running in the direction of displacement and that positioning bushings are attached to the sliding plate, which pass through the guide slot and form a guide element for the displacement movement of the scraper segments .
Mit Vorteil weisen die Positionierungsbuchsen hierbei jeweils eine Bohrung mit einem Innengewinde für eine Befestigungsschraube auf, mit welcher ein plattenartiges Deckelelement der Schürfleistenkassette befestigt ist.The positioning bushings advantageously each have a hole with an internal thread for a fastening screw, with which a plate-like cover element of the scraper cassette is fastened.
Wie bereits erwähnt sind die Schürfleistensegmente gegen eine Federkraft verschiebbar angeordnet. Für die Bereitstellung einer Federkraft ist bevorzugt ein gesondertes Federelement vorgesehen, welches im Inneren der Schürfleistenkassette angeordnet ist, um eine geschützte Anordnung des Federelements zu gewährleisten. In diesem Zusammenhang ist bevorzugt vorgesehen, dass jedem Schürfleistensegment wenigstens ein in der Schürfleistenkassette angeordnetes Federelement, insbesondere eine Schraubenfeder, zugeordnet ist, gegen welche(s) das jeweilige Schürfleistensegment verstellbar ist.As already mentioned, the scraper bar segments are arranged to be displaceable against a spring force. To provide a spring force, a separate spring element is preferably provided, which is arranged inside the scraper cassette in order to ensure a protected arrangement of the spring element. In this context, it is preferably provided that each scraper segment is assigned at least one spring element, in particular a helical spring, arranged in the scraper cassette, against which the respective scraper segment is adjustable.
Um zu verhindern, dass einzelne Schürfleistensegmente beim Eintritt in ein kleines Loch in der Fahrbahn hängenbleiben und dadurch beschädigt werden oder umgekehrt die Fahrbahn durch Ausreißen des Asphalts beschädigen, ist erfindungsgemäß vorgesehen, dass zwei benachbarte Schürfleistensegmente seitlich jeweils miteinander zusammenwirkende Formschlusselemente aufweisen, welche die relative Verschiebebewegung der Schürfleistensegmente begrenzen. Damit wird der maximale Hub jedes Schürfleistensegments relativ zu seinem benachbarten Schürfleistensegment begrenzt. Wenn der durch die Begrenzung maximal zulässige Hub relativ zum benachbarten Schürfleistensegment deutlich kleiner ist als der ohne Begrenzung mögliche Hub, z.B. weniger als die Hälfte des sonst möglichen Hubs beträgt, führt dies dazu, dass ein Schürfleistensegment nicht einzeln vollständig ausfahren kann, sondern immer nur im Verlauf mit den benachbarten Schürfleistensegmenten. Bevorzugt ist hierbei vorgesehen, dass die miteinander zusammenwirkenden Formschlusselemente von einem seitlich vorstehenden Zapfen des einen Schürfleistensegments und von einer seitlichen Nut des anderen Schürfleistensegments gebildet werden, in welche der Zapfen eingreift.To prevent individual scraper segments from getting stuck in the road when entering a small hole and are thereby damaged or, conversely, damage the road by tearing out the asphalt, it is provided according to the invention that two adjacent scraper segments each have form-fitting elements that interact with each other laterally, which limit the relative displacement movement of the scraper segments. This limits the maximum stroke of each scraper segment relative to its adjacent scraper segment. If the maximum permissible stroke relative to the adjacent scraper segment is significantly smaller than the stroke possible without limitation, e.g. less than half of the otherwise possible stroke, this means that a scraper segment cannot be fully extended individually, but only at a time Course with the neighboring cutting edge segments. It is preferably provided here that the interoperating form-fitting elements are formed by a laterally projecting pin of one scraper segment and by a lateral groove of the other scraper segment, into which the pin engages.
Bevorzugt ist jedem Schürfleistensegment wenigstens ein in der Schürfleistenkassette angeordnetes Federelement, insbesondere eine Schraubenfeder, zugeordnet, gegen welche(s) das jeweilige Schürfleistensegment verstellbar ist.Preferably, each scraper segment is assigned at least one spring element, in particular a helical spring, arranged in the scraper cassette, against which the respective scraper segment can be adjusted.
Bevorzugt bildet die Schürfleistenkassette ein an der der Deckelelement zugewandten Seite offenes Gehäuse für die Schürfleistensegmente.The scraper bar cassette preferably forms a housing for the scraper bar segments that is open on the side facing the cover element.
Wie bereits im Zusammenhang mit der erfindungsgemäßen Schürfleistenanordnung beschrieben, weisen die Schürfleistensegmente bevorzugt jeweils einen länglichen, in Verschieberichtung verlaufenden Führungsschlitz auf, wobei an der Schürfleistenkassette Positionierungsbuchsen befestigt sind, welche den Führungsschlitz durchsetzen und ein Führungselement für die Verschiebebewegung der Schürfleistensegmente ausbilden.As already described in connection with the scraper bar arrangement according to the invention, the scraper bar segments preferably each have an elongated guide slot running in the direction of displacement, positioning bushings being attached to the scraper bar cassette, which pass through the guide slot and form a guide element for the displacement movement of the scraper bar segments.
Die Positionierungsbuchsen weisen bevorzugt eine Bohrung mit einem Innengewinde für eine Befestigungsschraube auf, mit welcher ein plattenartiges Deckelelement der Schürfleistenkassette befestigt ist.The positioning bushings preferably have a bore with an internal thread for a fastening screw, with which a plate-like cover element of the scraper cassette is fastened.
Die Erfindung wird nachfolgend anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert. In dieser zeigen
In
In der Querschnittsansicht gemäß
Die verstellbaren Schürfleistensegmente 5 sind in der Schürfleistenkassette 4 gehalten, und zwar mit Hilfe von Positionierungsbuchsen 12 und 13, die z.B. mittels einer Schweißverbindung an der Gleitplatte 3 befestigt sind und ein Innengewinde aufweisen, in welches Befestigungsschrauben 16 eingeschraubt sind, um ein plattenartiges Deckelelement 8 der Schürfleistenkassette 4 zur Ausbildung eines Gehäuses an der Gleitplatte 3 zu befestigen. Für die Führung der Verschiebebewegung gemäß dem Doppelpfeil 6 weist das Schürfleistensegment 5 einen Führungsschlitz 15 (
In
Zusammenfassend hat die Schürfleistenanordnung die folgenden Eigenschaften. Grundlegend besteht das System aus zwei Baugruppen, der Gleitplatte und der Schürfleistenkassette mit den Schürfleistensegmenten. Die Gleitplatte dient als Verbindung zum Schild. Sie wird zusammen mit der bestehenden starren Schürfleiste an den Schildkörper verschraubt. Dabei ist zu beachten, dass die bestehenden Bohrungen gesenkt werden müssen, um eine ebene Gleitfläche für die Schürfleistensegmente zu gewährleisten. Der Vorteil dieser Gleitplatte liegt in der Unabhängigkeit von den Lochbildern verschiedener Pflugtypen. Es wird das jeweils vorliegende Lochbild des zu montierenden Pfluges auf die Gleitplatte übernommen und darauf die vormontierte Schürfleistenkassette mit den vertikal beweglichen, federvorgespannten Schürfleistensegmenten montiert.In summary, the scraper assembly has the following characteristics. The system basically consists of two assemblies, the sliding plate and the scraper cassette with the scraper segments. The sliding plate serves as a connection to the shield. It is screwed to the shield body together with the existing rigid scraper bar. It should be noted that the existing holes must be lowered to ensure a flat sliding surface for the cutting edge segments. The advantage of this sliding plate is that it is independent of the hole patterns of different plow types. This will be the hole pattern of the plow to be assembled transferred to the sliding plate and the pre-assembled scraper bar cassette with the vertically movable, spring-loaded scraper bar segments is mounted on it.
Auf der Gleitplatte befinden sich die fix verschweißten Gewindebuchsen. Zusammen mit den darauf gelagerten gehärteten Bohrbuchsen (verschleißfest) dienen sie als Führung der federvorgespannten Schürfleistensegmente. Zudem wird das Deckelelement damit positioniert und verschraubt. Dies garantiert eine stabile seitliche Führung der vertikal beweglichen Schürfleistensegmente. Der Grundkörper besitzt zudem eine Gleitfläche, auf der die beweglichen Schürfleistensegmente gleiten und abgestützt werden.The permanently welded threaded bushings are located on the sliding plate. Together with the hardened drill bushings (wear-resistant) mounted on them, they serve to guide the spring-loaded cutting edge segments. In addition, the cover element is positioned and screwed together. This guarantees stable lateral guidance of the vertically movable cutting edge segments. The base body also has a sliding surface on which the movable cutting edge segments slide and are supported.
Am Grundkörper vormontiert befinden sich ebenfalls die Federhalter mit den vorgespannten Federn, welche ein besonders einfaches Wechseln der Verschleißelemente ermöglichen. Der fertig vormontierte Grundkörper wird bei der Montage mit der Schürfleistenaufnahme des Schildkörpers verschraubt. Anschließend werden die Schürfleistensegmente einzeln eingelegt. Dies hat den großen Vorteil, dass die Montage sowie das Austauschen verschlissener Schürfleistensegmente ohne schweres Heben rasch erfolgen kann. In weiterer Folge wird nun die vormontierte Deckeleinheit mithilfe der Gewindebuchsen auf dem System positioniert und verschraubt. Die Deckeleinheit besteht aus einem Deckelblech, einem aufgeschweißten Gleitblech mit Freischnitten zur Schmutzaufnahme und Reibungsminimierung sowie einer Dichtung, die das System vor Verschmutzungen von oben schützt. Die Lösung mittels der eigenen Deckeleinheit bringt den Vorteil der einfachen Montage. Dadurch können die Schürfleistensegmente bei Erreichen der Verschleißgrenze einfach durch Abschrauben des Deckels gewechselt werden. Die Federn bleiben durch den Federhalter vorgespannt in Position und die einzelnen Schürfleistensegmente können nach der Reihe direkt am Pflug, ohne schweres Heben des Monteurs getauscht werden. In diesem Schritt können zudem eventuelle Verunreinigungen einfach beseitigt werden.The spring holders with the pre-tensioned springs are also pre-assembled on the base body, making it particularly easy to change the wear elements. The pre-assembled base body is screwed to the scraper holder of the shield body during assembly. The cutting edge segments are then inserted individually. This has the great advantage that assembly and replacement of worn scraper bar segments can be carried out quickly without heavy lifting. The pre-assembled cover unit is then positioned and screwed onto the system using the threaded bushings. The cover unit consists of a cover plate, a welded-on sliding plate with cutouts to absorb dirt and minimize friction, and a seal that protects the system from contamination from above. The solution using your own cover unit offers the advantage of easy installation. This means that when the wear limit is reached, the scraper bar segments can be removed simply by unscrewing the cover change. The springs remain pre-tensioned in position by the spring holder and the individual scraper bar segments can be replaced one after the other directly on the plow without the fitter having to do any heavy lifting. In this step, any contamination can also be easily removed.
Die Funktionsweise ist wie folgt. Die Federvorspannkraft der einzelnen Schürfleistensegmente ist so dimensioniert, dass sie im Einsatz auf ebenen Straßen vollständig eingefahren sind, der Pflug also sowohl auf den Schürfleistensegmenten aufliegt. Auf Straßen mit Spurrillen passen sich nun die einzelnen Schürfleistensegmente durch die Federvorspannkraft optimal an die gegebene Oberfläche an. Durch die Verwendung dieses Systems erhält der Anwender somit ein optimales Räumergebnis durch die mechanische Räumung und kann dadurch in weiterer Folge den Verbrauch von Streusalz und die damit verbundenen Kosten deutlich reduzieren.How it works is as follows. The spring preload force of the individual scraper bar segments is dimensioned so that they are completely retracted when used on flat roads, so that the plow rests on both the scraper bar segments. On roads with ruts, the individual scraper strip segments now adapt optimally to the given surface thanks to the spring preload force. By using this system, the user receives an optimal clearing result through mechanical clearing and can subsequently significantly reduce the consumption of road salt and the associated costs.
Ein weiterer Vorteil der erfindungsgemäßen Schürfleistenanordnung liegt darin, dass der Schnee aus Einfahrten oder Sackgassen auch herausgezogen werden kann, d.h. in der entgegengesetzten Räumrichtung.Another advantage of the scraper bar arrangement according to the invention is that the snow can also be pulled out of driveways or dead ends, i.e. in the opposite clearing direction.
Claims (14)
- A cutting edge arrangement for attachment to a plow blade, the cutting edge arrangement comprising adjustable cutting edge segments, wherein the adjustable cutting edge segments (5) comprise at least two groups of adjustable cutting edge segments (5), wherein the adjustable cutting edge segments (5) of one group are each arranged in a cutting edge cassette (4) in which the cutting edge segments (5) are guided adjustably against a spring force in a direction (6) extending transversely to a cutting edge (17) of the cutting edge segments (5), wherein the cutting edge segments (5) are displaceable in the respective cutting edge cassette (4) independently of one another between a retracted position and an extended position, and wherein the cutting edge cassette (4) has a slide plate (3) on which the cutting edge segments (5) slide during the displacement movement, characterized in that two adjacent cutting edge segments (5) each have laterally interacting positive-locking elements which limit the relative displacement movement of the cutting edge segments (5).
- Cutting edge arrangement according to claim 1, characterized in that the cutting edge segments (5) are slidable parallel to the slide plate (3) on the latter.
- Cutting edge arrangement according to claim 1 or 2, characterized in that the slide plate (3) has a fastening section (9) which is fastened to a cutting edge carrier (7) by means of fastening elements, in particular screw bolts (10), which pass through bores formed in the fastening section (9).
- Cutting edge arrangement according to claim 1, 2 or 3, characterized in that the cutting edge cassette (4) forms a housing for the cutting edge segments (5).
- Cutting edge arrangement according to any one of claims 1 to 4, characterized in that the cutting edge segments (5) each have an elongated guide slot (15) running in the displacement direction (6), and in that positioning bushings (12, 13) are fastened to the slide plate (3), which bushings pass through the guide slot (15) and form a guide element for the displacement movement of the cutting edge segments (5).
- Cutting edge arrangement according to claim 5, characterized in that the positioning bushings (12, 13) each have a bore with an internal thread for a fastening screw (16) with which a plate-like cover element (8) of the cutting edge cassette (5) is fastened.
- Cutting edge arrangement according to any one of claims 1 to 6, characterized in that each cutting edge segment (5) is assigned at least one spring element (14), in particular a helical spring, which is arranged in the cutting edge cassette (4) and against which the respective cutting edge segment (5) can be displaced.
- Cutting edge arrangement according to claim 1, characterized in that the cooperating positive-locking elements are formed by a laterally projecting pin of one cutting edge segment (5) and by a lateral groove of the other cutting edge segment (5) in which the pin engages.
- Cutting edge cassette for use in a cutting edge arrangement according to any one of claims 1 to 8, comprising a plurality of cutting edge segments (5) which are adjustably guided in the cutting edge cassette (4) against a spring force in a direction (6) extending transversely to a cutting edge (17) of the cutting edge segments (5), wherein the cutting edge segments (5) are displaceable in the cutting edge cassette (4) independently of one another between a retracted and an extended position, characterized in that two adjacent cutting edge segments (5) each have laterally cooperating positive-locking elements which limit the relative displacement movement of the cutting edge segments (5).
- Cutting edge cassette according to claim 9, characterized in that each cutting edge segment (5) is assigned at least one spring element (14), in particular a helical spring, which is arranged in the cutting edge cassette (4) and against which the respective cutting edge segment (5) can be displaced.
- Cutting edge cassette according to claim 9 or 10, characterized in that the cutting edge cassette (4) comprises a housing for the cutting edge segments (5) which is open on the side facing the cover element (8).
- Cutting edge cassette according to any one of claims 9 to 11, characterized in that the cutting edge segments (5) each have an elongated guide slot (15) running in the direction of displacement, and in that positioning bushings (12, 13) are fastened to the cutting edge cassette (4), which bushings pass through the guide slot (15) and form a guide element for the displacement movement of the cutting edge segments (5).
- Cutting edge cassettee according to claim 12, characterized in that the positioning bushings (12, 13) each have a bore with an internal thread for a fastening screw (16) with which a plate-like cover element (8) of the cutting edge cassette (4) is fastened.
- Cutting edge arrangement according to claim 9, characterized in that the cooperating positive-locking elements are formed by a laterally projecting pin of one cutting edge segment (5) and by a lateral groove of the other cutting edge segment (5) in which the pin engages.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA7/2021A AT523738B8 (en) | 2021-01-12 | 2021-01-12 | Scraper assembly and scraper cartridge |
Publications (3)
Publication Number | Publication Date |
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EP4026949A1 EP4026949A1 (en) | 2022-07-13 |
EP4026949B1 true EP4026949B1 (en) | 2023-11-15 |
EP4026949C0 EP4026949C0 (en) | 2023-11-15 |
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EP22020005.9A Active EP4026949B1 (en) | 2021-01-12 | 2022-01-11 | Scraper bars assembly and scraper bars cartridge |
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EP (1) | EP4026949B1 (en) |
AT (1) | AT523738B8 (en) |
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FI679U1 (en) | 1993-01-22 | 1993-04-23 | Pertti Vauhkonen | Bett Foer en plog |
CA2698744A1 (en) * | 2010-04-06 | 2011-10-06 | Jimmy Vigneault | Device for scraping undesirable material on a surface, method of manufacturing of said device as well as the device's use |
CA2867957A1 (en) * | 2014-10-17 | 2016-04-17 | Jimmy Vigneault | Scraper blade device with juxtaposed blade segments having a swivel interconnection between mating edges |
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2021
- 2021-01-12 AT ATA7/2021A patent/AT523738B8/en active
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- 2022-01-11 EP EP22020005.9A patent/EP4026949B1/en active Active
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EP4026949A1 (en) | 2022-07-13 |
AT523738A4 (en) | 2021-11-15 |
AT523738B1 (en) | 2021-11-15 |
EP4026949C0 (en) | 2023-11-15 |
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