EP1812651A1 - Pflugschar für schneepflug und schneepflug - Google Patents

Pflugschar für schneepflug und schneepflug

Info

Publication number
EP1812651A1
EP1812651A1 EP05801465A EP05801465A EP1812651A1 EP 1812651 A1 EP1812651 A1 EP 1812651A1 EP 05801465 A EP05801465 A EP 05801465A EP 05801465 A EP05801465 A EP 05801465A EP 1812651 A1 EP1812651 A1 EP 1812651A1
Authority
EP
European Patent Office
Prior art keywords
blade
wear
snowplough
inner core
resistant members
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05801465A
Other languages
English (en)
French (fr)
Other versions
EP1812651A4 (de
EP1812651B1 (de
Inventor
Lars GRÖNVALL
Peter Ahlberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Metso Sweden AB
Original Assignee
Metso Minerals Wear Protection AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Metso Minerals Wear Protection AB filed Critical Metso Minerals Wear Protection AB
Publication of EP1812651A1 publication Critical patent/EP1812651A1/de
Publication of EP1812651A4 publication Critical patent/EP1812651A4/de
Application granted granted Critical
Publication of EP1812651B1 publication Critical patent/EP1812651B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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 present invention relates to a share or blade for a snowplough comprising at least one outer layer arranged on an inner core.
  • the invention also relates to a snowplough fitted with such blades.
  • a snowplough blade is a wearing part which is screw ⁇ ed to an attachment plate of a snowplough.
  • a plurality of short blades are arranged side by side to cover the entire plough width.
  • the blades are often made entirely of rubber or polyurethane.
  • they can also be built as a sandwich construction.
  • An example of such a snowplough blade is disclosed in DE-C-3, 404, 030 and consists of a rubber or plastic body, which on both sides is covered with steel plates.
  • a wear-resistant member of corundum is embedded in the body.
  • a drawback of this sandwich con ⁇ struction is that the hard steel wears down the roadways and tends to damage or raise well covers and the like.
  • the object of the present invention therefore is to provide a blade which is improved compared with prior-art snowplough blades.
  • a special object is to provide a blade with a long life, which can be used also at places where sparking is not allowed.
  • An object of the present invention is also to pro ⁇ vide a snowplough blade which is easy to be disposed of once it has worn out.
  • the outer layer is made essentially of plastic material and the inner core essen ⁇ tially of elastomeric material. With this construction, a stable blade with good wear resistance is ensured.
  • the inner core there is a fastening means for fastening at least one wear-resistant member arranged in the core.
  • the wear-resistant member increases the wear resistance of the blade, and the fastening means makes it possible for the wear-resistant member to be more reliably held in the blade and the load displacements to be better con ⁇ trolled.
  • the blade comprises two such outer layers, which are arranged on opposite sides of the inner core. This improves the stability and strength of the blade.
  • the plastic material in the outer layer is prefer- ably polycarbonate plastic, which ensures good rigidity.
  • the elastomeric material is advantageously polyure- thane, which has good wear resistance and is easy to shape as desired.
  • the wear-resistant member is preferably made of a ceramic material. Ceramic materials have high wear resis ⁇ tance and are easy to shape as required.
  • the fastening means may comprise a rib extending along a length of the blade and provided with projec ⁇ tions, between which said at least one wear-resistant member is arranged.
  • This is a mechanically simple way of fastening the wear-resistant member in the blade.
  • the blade advantageously comprises a plurality of said wear-resistant members, the wear-resistant members being arranged in an abutment surface of the blade, which abutment surface is adapted, in use, to abut against a ⁇ ground surface, and the wear-resistant members having such a shape and being arranged in such a manner relative to each other that in a travelling direction of the snow- plough they overlap each other at least partly.
  • the wear- resistant members are thus held more safely in the blade and the risk of snow swaths is reduced.
  • the wear-resistant members can in the plane of the abutment surface be trapezoidal, rhomboid or T-shaped to provide the desired overlap.
  • the inventive snowplough comprises at least one inventive blade. This makes the snowplough stable and resistant to wear.
  • Fig. 1 is a perspective view of part of an inventive snowplough
  • Fig. 2 is a side view of the snowplough part in Fig. 1,
  • Fig. 3 is a perspective view of an inventive snow- plough blade
  • Fig. 4 is a sectional view of the snowplough blade in Fig. 3
  • Fig. 5 illustrates a fastening means for fastening wear-resistant members in the blade in Fig. 4, and
  • Figs ⁇ a-c are top plan views of different embodi ⁇ ments of wear-resistant members in the blade in Fig. 4. Description of Preferred Embodiments
  • the snowplough 1 partly shown in Fig. 1 has a plough plate 2 and three snowplough blades 3 screwed to the plough plate 2. As shown in Figs 2 and 3, there are through holes 4 in the upper part of the blade 3 for fas ⁇ tening by means of screw joints 5.
  • the blade 3 consists, as can be seen most easily from the section in Fig. 4, of a sandwich construction with two outer layers 6 on an inner core 7.
  • the outer layers 6 consist of plastic material and the inner core 7 of elastomeric material.
  • a plurality of wear-resistant members 8 are embedded to increase the resistance to wear of the blade 3.
  • a fastening means in the form of a rib 9.
  • the rib 9 extends along the length of the blade 3 and has projections 10, between which fit the wear-resistant mem ⁇ bers 8.
  • the rib 9 controls the positioning of the wear- resistant members 8 in manufacture of the blade 3 and also controls the distribution of forces when using the blade 3.
  • a tubular piece 11 extending therethrough is used.
  • Figs ⁇ a-c illustrate different examples of the appearance of the wear-resistant members 8. These exam ⁇ ples illustrate the shape of the wear-resistant members 8 in the plane of the abutment surface 12.
  • the abutment surface 12 is the surface of the blade 3 which in use of the snowplough 1 abuts against the ground surface 13, as shown in Fig. 2.
  • the wear-resistant members 8 have such a shape and are arranged in such a manner relative to each other that in the travelling direction R of the snowplough 1 they part- Iy overlap each other. This reduces the existence of snow swaths which otherwise form between the wear-resistant members 8 when the elastomeric material between them has worn off.
  • the desired overlap can be provided by the wear-resistant members 8 in the plane of the abutment surface 12 being trapezoidal, as shown in Fig. 6a, and placed side by side alternately with a short side or a long side in the travelling direction R.
  • the desired overlap can also be provided by the wear-resistant mem ⁇ bers being given a rhomboid shape, as shown in Fig. 6b.
  • Fig. ⁇ c shows wear-resistant members 8 which in the plane of the abutment surface 12 are T-shaped. This is a some- what more complicated shape, which on the other hand ensures improved locking of the wear-resistant members 8 in the inner core 7.
  • the wear-resistant members can also have other shapes, for instance rectangular as in Fig.
  • the wear-resistant members 8 can also be cylindrical with a circular shape in the plane of the abutment surface 12. In this way, sharp corners, which may cause stress con ⁇ centrations, are avoided.
  • the wear-resistant members 8 extend, as is to be seen in Fig. 4, all the way to the abutment surface 12 and have an end face which is paral- IeI to the abutment surface 12.
  • the blade 3 can, however, also be designed so that the wear-resistant members 8 from the beginning are completely embedded in the core 7 and are not uncovered in the abutment surface 12 until the blade 3 has worn down somewhat.
  • the end face of the wear-resistant members 8 can also make an angle greater than zero to the abutment surface 12.
  • the plastic material of the outer layers ⁇ is in the shown example polycarbonate plastic (PC) .
  • PC polycarbonate plastic
  • Polycarbonate plastic is kinder to the roadway than the steel that is used in prior-art sandwich blades.
  • polycar ⁇ bonate plastic is better at absorbing shocks and impacts than steel. As a result, a smoother action is ensured.
  • the elastomeric material of the inner core 7 is in the shown example polyurethane (PU) . Also other plastic and elastomeric materials can be used for the outer layers 6 and the inner core 7, respec ⁇ tively. Instead of polyurethane, for instance natural rubber can be used.
  • the plastic of the outer layers 6 gives the blade the necessary stability and the elasto- meric material of the inner core 7 provides resistance to wear. Since the outer layers 6 are made of plastic, there will be no sparking as the snowplough travels over the ground surface 13, which means that snowploughs 1 with such blades 3 can be used also at airports and other places where sparking is not allowed.
  • the inventive blade 3 consists of plastic and elastomeric material it is easier to be disposed of once it has worn out.
  • the material can be burnt and the energy used for heating.
  • the wear-resistant members 8 are suitably made of a ceramic material, but other wear-resistant materials are also conceivable, such as corundum or steel.
  • the tubular piece 11 is preferably made of plastic. It may also be made of metal but must in that case be removed before the worn-out blade 3 is burnt.
  • the tubular piece 11 can also be excluded or replaced by a washer, such as a terminal cup washer.
  • the number of wear-resistant members 8 in the inner core 7 of the blade 3 is not decisive.
  • the blade 3 can also be made entirely without wear-resistant members, but this would reduce its resistance to wear.
  • the blade 3 can also be made with only one outer layer 6, preferably arranged on the front side of the blade 3 in the travelling direction R.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cleaning Of Streets, Tracks, Or Beaches (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Road Paving Structures (AREA)
EP05801465.5A 2004-11-10 2005-11-10 Pflugschar für schneepflug und schneepflug Not-in-force EP1812651B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0402727A SE527977C2 (sv) 2004-11-10 2004-11-10 Snöplogskär och snöplog
PCT/SE2005/001686 WO2006052196A1 (en) 2004-11-10 2005-11-10 Snowplough share and snowplough

Publications (3)

Publication Number Publication Date
EP1812651A1 true EP1812651A1 (de) 2007-08-01
EP1812651A4 EP1812651A4 (de) 2013-02-27
EP1812651B1 EP1812651B1 (de) 2016-03-30

Family

ID=33488195

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05801465.5A Not-in-force EP1812651B1 (de) 2004-11-10 2005-11-10 Pflugschar für schneepflug und schneepflug

Country Status (3)

Country Link
EP (1) EP1812651B1 (de)
SE (1) SE527977C2 (de)
WO (1) WO2006052196A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016114457A1 (de) 2016-08-04 2018-02-08 Küper Gmbh & Co. Kg Räumleiste für den Einsatz bei hohen Geschwindigkeiten und langen Räumstrecken
DE102018125674A1 (de) * 2018-10-16 2020-04-16 Küper Gmbh & Co. Kg Räumleiste für den Räumschild eines Schneepflugs

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3334121A1 (de) * 1983-03-31 1984-04-05 Bernhard Dipl.-Ing. 1000 Berlin Leuschner Raeumleiste fuer den raeumschild eines schneepfluges
WO1995028526A1 (en) * 1994-04-13 1995-10-26 Scana Staal A/S Ploughshare

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4347677A (en) * 1979-02-05 1982-09-07 Gummi Kuper Gmbh & Co. Kg Snow removal bar for the snow removal plate of a snow plow
JPH01178606A (ja) * 1988-01-09 1989-07-14 Topy Ind Ltd 除雪用プラウとその製造方法
US4833799A (en) * 1988-08-08 1989-05-30 Harte Francis A Automotive snow plow with tow ring receiving push bar plates

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3334121A1 (de) * 1983-03-31 1984-04-05 Bernhard Dipl.-Ing. 1000 Berlin Leuschner Raeumleiste fuer den raeumschild eines schneepfluges
WO1995028526A1 (en) * 1994-04-13 1995-10-26 Scana Staal A/S Ploughshare

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2006052196A1 *

Also Published As

Publication number Publication date
SE0402727D0 (sv) 2004-11-10
SE0402727L (sv) 2006-05-11
EP1812651A4 (de) 2013-02-27
SE527977C2 (sv) 2006-07-25
EP1812651B1 (de) 2016-03-30
WO2006052196A1 (en) 2006-05-18

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